WO2025060433A1 - Heat exchange apparatus and energy storage apparatus - Google Patents

Abstract

A heat exchange apparatus and an energy storage apparatus, relating to the technical field of cooling and dehumidification devices. The heat exchange apparatus is used for being arranged in an energy storage apparatus, and comprises a heat exchanger and a partition member. The heat exchanger is internally provided with a refrigerant channel; the partition member is located in the heat exchanger; the partition member divides the heat exchanger into a first heat exchange portion and a second heat exchange portion, and divides the refrigerant channel into a first refrigerant channel and a second refrigerant channel; the first heat exchange portion is used for dissipating heat from an energy storage battery; the second heat exchange portion is located outside the energy storage battery and used for reducing the air humidity in an energy storage cabinet; and the first refrigerant channel is separately communicated with a first refrigerant inlet pipe and a first refrigerant output pipe, and the second refrigerant channel is separately communicated with a second refrigerant inlet pipe and a second refrigerant outlet pipe. In the present application, the heat exchanger is divided into two heat exchange portions by means of the partition member so as to form a cooling module for the energy storage battery and a dehumidification module for the energy storage battery, respectively, such that dual cooling of the temperature of the energy storage battery and the humidity of the environment in which the energy storage battery is located can be realized by means of a single heat exchange component.

Description

Heat exchangers and energy storage devices

This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office of China on September 22, 2023, with application number 202322597618.8, and the priority of the Chinese patent application with the invention name “Heat Exchange Device and Energy Storage Device”, all contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the technical field of cooling and dehumidification of energy storage systems, and in particular to a heat exchange device and an energy storage device.

Background Art

In energy storage devices, if the temperature of the energy storage battery is too high or the humidity of the energy storage cabinet is too high, it will affect the normal operation of the equipment. Generally, the energy storage thermal management system is usually composed of a liquid cooling unit and a water circulation system. The conventional response method is to use a dehumidified air-cooled evaporator and a throttled low-temperature and low-pressure refrigerant to cool the humid air in the energy storage cabinet. The temperature of the evaporator is reduced to below the dew point to dehumidify the humid air in the energy storage cabinet. A plate heat exchanger is used to transfer the cold to the ethylene glycol aqueous solution, and the low-temperature ethylene glycol aqueous solution is used to cool the energy storage battery.

Therefore, two heat exchangers are usually required in the energy storage cabinet to exchange cold energy with the energy storage battery and the humid air in the cabinet. However, in terms of function, both heat exchangers need to input low-temperature refrigerant and use the low-temperature refrigerant to cool the high-temperature battery and the air around the battery. Two heat exchangers will result in a large number of parts and a complex system, and the two heat exchangers need to be fixed and installed separately in the cabinet.

Summary of the invention

The present application provides a heat exchange device and an energy storage device, which are divided into two heat exchange parts by a partition to respectively constitute a refrigeration module of the energy storage battery and a dehumidification module of the energy storage battery. A single heat exchange component can achieve dual cooling of the energy storage battery temperature and the humidity of the environment in which the energy storage battery is located.

In a first aspect, the present application provides a heat exchange device for being arranged in an energy storage device, wherein the energy storage device includes an energy storage cabinet and an energy storage battery located in the energy storage cabinet, and is characterized in that it includes: a heat exchanger, wherein the heat exchanger has a refrigerant channel; a partition located in the heat exchanger, wherein the partition divides the heat exchanger into a first heat exchange portion and a second heat exchange portion; the first heat exchange portion includes a first refrigerant channel and a third refrigerant channel, the second heat exchange portion includes a second refrigerant channel, the first refrigerant channel is used to circulate refrigerant, and the first refrigerant channel and the third refrigerant channel are adjacently arranged to circulate the third refrigerant The medium in the channel dissipates heat, the third refrigerant channel is used to be connected to the inner cavity of the cold plate, the cold plate is used to contact the energy storage battery to dissipate heat for the energy storage battery, and the second heat exchange part is used to reduce the air humidity in the energy storage cabinet; the refrigerant pipe includes a liquid inlet pipe, a liquid outlet pipe, a first refrigerant inlet pipe, a first refrigerant outlet pipe, a second refrigerant inlet pipe and a second refrigerant outlet pipe, the third refrigerant channel is respectively connected to the liquid inlet pipe and the liquid outlet pipe, the second refrigerant channel is respectively connected to the second refrigerant inlet pipe and the second refrigerant outlet pipe, and the first refrigerant channel is respectively connected to the first refrigerant inlet pipe and the first refrigerant outlet pipe.

In this embodiment, compared with setting two heat exchangers for heat dissipation and dehumidification respectively, the heat exchanger of this embodiment is divided into two heat exchange parts by a partition to respectively constitute a refrigeration device of the energy storage battery and a dehumidification device of the energy storage battery, and a single heat exchange component can realize dual cooling of the temperature of the energy storage battery and the humidity of the environment in which the energy storage battery is located. In addition, the first heat exchange part and the second heat exchange part are an integral device, and only one installation position needs to be set in the power storage system to simultaneously install the first heat exchange part and the second heat exchange part, which reduces the number of installation positions, makes installation more convenient, and saves installation space and installation costs. Furthermore, the first heat exchange part and the second heat exchange part are two parts separated from the same heat exchanger. During preparation, only one process, such as brazing, is required to prepare a heat exchanger having both cooling and dehumidification functions at one time, and the preparation process is simpler; furthermore, the distance between the first heat exchange part and the second heat exchange part is shortened, and the piping routing between refrigeration modules such as compressors and each heat exchange part is simpler, which can reduce the length of the piping; the dehumidification function of the energy storage cabinet space and the cooling function of the battery thermal management are combined into one, which can save the number of parts. For example, only two end covers are needed to seal the two heat exchange tube openings of the heat exchanger, which is half the number of end covers required for sealing the two separate heat exchangers, thereby achieving the purpose of improving manufacturing efficiency and reducing costs.

In a possible implementation, the heat exchanger includes a first liquid dispensing tube, a heat exchange plate, and a second liquid dispensing tube, wherein the heat exchange plate is located between the first liquid dispensing tube and the second liquid dispensing tube; the partition includes a first partition and a second partition, wherein the first partition divides the first liquid dispensing tube into a first liquid dispensing portion and a second liquid dispensing portion, and the second partition divides the second liquid dispensing tube into a first liquid dispensing portion and a second liquid dispensing portion. Three liquid separation parts and a fourth liquid separation part; the heat exchange plate includes a first heat exchange plate and a second heat exchange plate; the first heat exchange part includes the first liquid separation part, the first heat exchange plate and the third liquid separation part, and the second heat exchange part includes the second liquid separation part, the second heat exchange plate and the fourth liquid separation part; the third refrigerant channel includes the first inner cavity of the first liquid separation part, the first inner cavity of the first heat exchange plate and the first inner cavity of the third liquid separation part which are connected in sequence; the second refrigerant channel includes the inner cavity of the second liquid separation part, the inner cavity of the second heat exchange plate and the inner cavity of the fourth liquid separation part which are connected in sequence; the first refrigerant channel includes the second inner cavity of the first liquid separation part, the second inner cavity of the first heat exchange plate and the second inner cavity of the third liquid separation part which are connected in sequence.

In this embodiment, by setting a first liquid separator, a heat exchange plate and a second liquid separator, the heat exchange plate can be a plate-shaped tube to form a plate heat exchanger, thereby increasing the contact area between the third refrigerant channel and the first refrigerant channel in the heat exchange device and increasing the heat exchange efficiency. The first liquid separator is divided into a first liquid separator and a second liquid separator by a separator, and the second liquid separator is divided into a third liquid separator and a fourth liquid separator. The first heat exchange plate is connected between the first liquid separator and the third liquid separator, and the second heat exchange plate is connected between the second liquid separator and the fourth liquid separator. The first liquid separator, the first heat exchange plate and the third liquid separator constitute the first heat exchange part, and the first heat exchange part can be used to dissipate heat for the energy storage battery. The second liquid separator, the second heat exchange plate and the fourth liquid separator constitute the second heat exchange part, and the second heat exchange part can be used to cool the air around the energy storage battery to reduce the humidity of the air around the energy storage battery. The first heat exchange part and the second heat exchange part can work independently, and the first heat exchange part and the second heat exchange part are an integral structure. The first liquid separation part and the third liquid separation part serve as the refrigerant inlet pipe and the refrigerant outlet pipe of the first heat exchange plate, and are used to be connected with the refrigerant pipeline of the compressor system.

In a possible implementation, the first separator separates and isolates the inner cavity of the first liquid-separating part and the inner cavity of the second liquid-separating part, and the first liquid-separating tube and the first separator are in an integrated structure; the second separator separates and isolates the inner cavity of the third liquid-separating part and the inner cavity of the fourth liquid-separating part, and the second liquid-separating tube and the second separator are in an integrated structure. Both the first separator and the second separator can be in an integrated structure with the liquid-separating tube, for example, welded in the liquid-separating tube, and can be welded in the liquid-separating tube together when the liquid-separating tube is brazed, without increasing the complexity of the preparation process.

In a possible implementation, the first direction is the direction from the first liquid dispensing tube toward the second liquid dispensing tube, and the first heat exchange plate and the second heat exchange plate are spaced apart in a direction perpendicular to the first direction. The first heat exchange plate and the second heat exchange plate are spaced apart, and no heat transfer occurs between the first heat exchange plate and the second heat exchange plate, forming a heat exchange device in which the first heat exchange plate and the second heat exchange plate are located in the same heat exchanger but have independent functions.

In a possible implementation, the first inner cavity in the first liquid separating portion is located outside the second inner cavity in the first liquid separating portion;

The first inner cavity in the first heat exchange plate is located on both sides of the second inner cavity in the first heat exchange plate;

The first inner cavity in the third liquid separating portion is located at the periphery of the second inner cavity in the third liquid separating portion.

In this embodiment, a low-temperature refrigerant flows in the refrigerant channel, and the first refrigerant inlet pipe passes through the first liquid-dividing part and is connected to the second inner cavity in the first liquid-dividing part; the first refrigerant outlet pipe passes through the third liquid-dividing part and is connected to the second inner cavity in the third liquid-dividing part. The first refrigerant inlet pipe, the second inner cavity of the first liquid-dividing part, the second inner cavity of the first heat exchange plate, the second inner cavity of the third liquid-dividing part and the first refrigerant outlet pipe flow in sequence to form the first refrigerant channel of the first heat exchange part, and the low-temperature refrigerant reduced in pressure by the throttling device flows in the first refrigerant channel. The first inner cavity of the first liquid-dividing part, the first inner cavity of the first heat exchange plate and the first inner cavity of the third liquid-dividing part are connected in sequence to form the third refrigerant channel, and the third refrigerant channel is located at the periphery of the first refrigerant channel. The low-temperature refrigerant flowing in the third refrigerant channel first transmits the cold to the ethylene glycol aqueous solution in the third refrigerant channel, and the ethylene glycol aqueous solution can flow into the cold plate, and the cold plate transfers the cold to the energy storage battery for direct heat exchange. The heat exchange device provided in this embodiment can constitute an indirect heat exchange refrigeration system of the refrigerant and the intermediate medium (ethylene glycol aqueous solution), which can be safer when cooling the energy storage battery. Specifically, when the refrigerant is transformed between the liquid phase and the gas phase, an unbalanced gas-liquid transformation is likely to occur, resulting in an uneven flow of the refrigerant in the refrigerant pipeline, and a large temperature difference in the refrigerant pipeline. When directly cooling the energy storage battery, etc., it causes a large temperature change, which affects the temperature uniformity of the battery. The present application adopts an indirect heat exchange refrigeration system, and the intermediate medium (ethylene glycol aqueous solution) is a single-phase medium, there is no phase change, the temperature distribution is uniform, and the temperature uniformity of the energy storage battery is good.

In a possible implementation, the first inner cavity in the first heat exchange plate includes a plurality of first sub-inner cavities arranged side by side, and the two ends of the plurality of first sub-inner cavities are respectively connected to the first inner cavity of the first liquid separation part and the first inner cavity of the third liquid separation part; or, the second inner cavity in the first heat exchange plate includes a plurality of second sub-inner cavities arranged side by side, and the two ends of the plurality of second sub-inner cavities are respectively connected to the second inner cavity of the first liquid separation part and the second inner cavity of the third liquid separation part. The refrigerant in each first sub-inner cavity and the second sub-inner cavity circulates independently to improve the refrigeration efficiency.

In a possible implementation, the second heat exchange plate includes a plurality of heat exchange tubes, the two ends of the plurality of heat exchange tubes are respectively connected to the inner cavity of the second liquid separation part and the inner cavity of the fourth liquid separation part, and a gap channel is provided between two adjacent heat exchange tubes. The gap channel between the two heat exchange tubes can be used for air to circulate through, so as to increase the heat exchange area between the air and the second heat exchange plate and improve the cooling rate. rate to improve dehumidification efficiency.

In a possible implementation, the second heat exchange plate further includes a fin, and the fin is connected between two adjacent heat exchange tubes. The fin can increase the heat exchange area between the air and the second heat exchange plate, increase the cooling rate, and thus improve the dehumidification efficiency.

In one possible implementation, a throttling device is provided on the first refrigerant inlet pipe and the second refrigerant inlet pipe, and the throttling device can reduce the pressure of the refrigerant flowing into the first refrigerant inlet pipe and the second refrigerant inlet pipe, thereby reducing the temperature of the refrigerant so that it can better flow into the heat exchange plate for cooling.

In a second aspect, the present application provides an energy storage device, comprising an energy storage battery, a cold plate and a heat exchange device as described in any one of the above items, wherein a third refrigerant channel of the heat exchange device is connected to an inner cavity of the cold plate, and the cold plate is in contact with the energy storage battery to dissipate heat from the energy storage battery.

In one possible implementation, the energy storage device includes an energy storage cabinet and an air circulation device, the energy storage battery, the air circulation device and the heat exchange device are all located in the energy storage cabinet, the air outlet of the air circulation device faces the second heat exchange part of the energy storage device, and the air circulation device is used to increase the circulation speed of the air around the second heat exchange part to improve the efficiency of the second heat exchange part in reducing the air humidity in the energy storage cabinet where the energy storage battery is located.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of an energy storage device provided in an embodiment of the present application;

FIG2 is a schematic diagram of a heat exchange plate structure provided in an embodiment of the present application;

FIG3 is a schematic cross-sectional view of A-A in FIG2 provided by the present application;

FIG4 is a schematic diagram of the pipeline connection of the heat exchange device provided in an embodiment of the present application;

FIG5 is a second schematic diagram of the heat exchange plate structure provided in an embodiment of the present application;

FIG6 is a cross-sectional schematic diagram 1 of FIG5 provided by the present application;

FIG7 is a schematic cross-sectional view B-B in FIG5 provided by the present application;

FIG8 is a schematic cross-sectional view of C-C in FIG5 provided by the present application;

FIG9 is a schematic cross-sectional view D-D in FIG5 provided by the present application;

FIG10 is a cross-sectional view E-E in FIG5 provided by the present application;

FIG11 is a second cross-sectional schematic diagram of F-F in FIG5 provided by the present application;

FIG12 is a second cross-sectional schematic diagram of the C-C section in FIG5 provided by the present application;

FIG13 is a second cross-sectional schematic diagram of D-D in FIG5 provided by the present application;

FIG14 is a second cross-sectional schematic diagram of E-E in FIG5 provided by the present application;

FIG15 is a schematic diagram of a collector provided in an embodiment of the present application;

FIG16 is a third schematic diagram of the heat exchange plate structure provided in an embodiment of the present application;

FIG17 is a schematic diagram of an application scenario of an energy storage device provided in an embodiment of the present application;

Figure 18 is the third C-C cross-sectional schematic diagram in Figure 5 provided by the present application.

Reference numerals
100-heat exchanger; 100a-first heat exchange part; 100b-second heat exchange part; 110-refrigerant channel; 110a-first refrigerant channel; 110b-second refrigerant channel; 110c-third refrigerant channel; 111-first inner cavity; 112-second inner cavity; 120a-first refrigerant inlet pipe; 120b-second refrigerant inlet pipe; 120c-first inlet end; 130a-first refrigerant outlet pipe; 130b-second refrigerant outlet pipe; 130c-first outlet port; 140-first liquid separation pipe; 141-first liquid separation part; 1411-first refrigerant pipe; 142-second liquid separation part; 150-heat exchange plate; 151-first heat exchange plate; 151a-first partition plate; 151b-second sub-inner cavity; 151c-second partition plate; 151d-first sub-inner cavity; 1511-second refrigerant pipe; 152- The second heat exchange plate; 152a-heat exchange tube; 152b-fin; 160-second liquid distribution tube; 161-third liquid distribution part; 1611-third refrigerant tube; 162-fourth liquid distribution part; 170-collecting pipe; 171-first through hole; 172-second through hole; 181-first channel; 182-second channel; 183-third channel; 184-liquid outlet pipe; 185-liquid inlet pipe; 200-separator; 210-first partition; 220-second partition; 300-throttling device; 400-energy storage battery; 500-energy storage cabinet; 510-first cabinet; 520-second cabinet; 600-air circulation device; 700-condenser; 700a-second inlet end; 700b-second outlet end; 800-compressor; 800a-third inlet end; 800b-third outlet end; 900-cold plate.

DETAILED DESCRIPTION

The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of the present application are explained and described below.

It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

It should be understood that the term "and/or" used in this article is only a description of the same field of the associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.

It should be understood that the terms “first”, “second”, etc. used in the present application are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

In the description of the present application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

When used in this application, “within the range of…”, unless it is separately specified that an end value is not included, it is assumed that both end values of the range are included. For example, in the range of 1 to 5, the two values 1 and 5 are included.

In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

The present application provides a heat exchange device that can be used in the field of energy storage devices, for example, it can be used in energy storage thermal management systems. Energy storage devices mainly include energy and material input and output, energy conversion and storage equipment, often involving multiple energies, multiple equipment, multiple materials and multiple processes. It is mainly a complex energy system that changes over time, and multiple indicators are required to describe its performance. With the intensification of the global energy crisis, skyrocketing electricity prices and energy security concerns have continued to heat up the energy storage market. Whether it is the power supply side, the grid side or the user side, energy storage can play a role in peak load regulation in the power system.

Among them, thermal management is an important part of electrochemical energy storage devices and an important measure to ensure the safety of energy storage power stations. Energy storage devices must be equipped with a thermal management system with sufficient strength and flexibility to ensure the safe and stable operation of power stations. At present, in energy storage application products, common energy storage thermal management systems are mainly divided into two categories: air cooling and liquid cooling. The air cooling system has a simple structure and low cost, while the liquid cooling has lower power consumption and better cooling effect. The air cooling system has the characteristics of simple system, fewer parts than the liquid cooling system, low cost of the whole machine and convenient installation. It is widely used in scenarios with low battery energy density and slow charging and discharging speed. The liquid cooling system has the characteristics of large heat load and high heat exchange efficiency. It is widely used in occasions with high battery pack energy density, fast charging and discharging speed and large ambient temperature changes. Through reasonable configuration, the cost of the liquid cooling system can be lower than that of the air cooling system. In addition to the two main technical lines of air cooling and liquid cooling, there is also an immersion liquid cooling energy storage method, which dissipates heat by immersing the electrochemical energy storage unit in a liquid coolant. The advantages of the immersion liquid cooling energy storage power station are high efficiency, reliability and safety. The energy storage thermal management liquid cooling system is the main line of future technological development.

The present application provides a heat exchange device, which can be arranged in an energy storage device, and can simultaneously reduce the temperature of an energy storage battery in the energy storage device and the air humidity in the space outside the energy storage battery, wherein the air humidity in the space outside can be the humidity value of the surrounding air in contact with the energy storage battery. The energy storage device includes an energy storage cabinet and an energy storage battery located in the energy storage cabinet, and the heat exchange device can reduce the temperature of a cold plate, the cold plate is in contact with the energy storage battery and is used to reduce the temperature of the energy storage battery, and the other part is located outside the energy storage battery and is used to reduce the air humidity in the energy storage cabinet.

In one embodiment, as shown in FIG. 1 , the heat exchange device 10 may be located in an energy storage cabinet 500, and the energy storage cabinet 500 may include a first cabinet 510 and a second cabinet 520. The heat exchange device 10 may be installed in the first cabinet 510, and the energy storage battery 400 may be installed in the second cabinet 520. There may be multiple energy storage batteries 400, and the multiple energy storage batteries 400 may be stacked in the second cabinet 520 in a drawer-like structure. The energy storage cabinet 500 may be provided with a vertical cabinet board in the middle to separate it into the first cabinet 510 and the second cabinet 520, and the energy storage battery 400 may be installed in the second cabinet 520, and the main body of the heat exchange device 10 and the energy storage battery 400 are provided separately.

The heat exchange device 10 may include various devices used as a refrigeration system such as a heat exchanger 100, a condenser 700, a compressor 800, and a throttle valve. Referring to FIG1 , the high-temperature refrigerant compressed by the compressor 800 is condensed, cooled, and depressurized by the condenser 700, and depressurized and cooled to a low-temperature refrigerant by the throttle valve. The low-temperature refrigerant enters the heat exchanger 100 for refrigeration, and the refrigerant after heat exchange returns to the compressor 800 for recompression, forming a refrigeration cycle.

The heat exchanger 100 has two functions. One part can be used to cool the energy storage battery 400, and the other part can be used to cool the energy storage cabinet. The air inside 500 is cooled to reduce the ambient humidity inside the energy storage cabinet 500 .

The heat exchange device 10 also includes an air circulation device 600, which can be a fan for blowing air to a portion of the heat exchanger 100 used to reduce the internal air temperature of the energy storage cabinet 500. This portion of the heat exchanger 100 can condense the surrounding air into water droplets to reduce the surrounding humidity value. A ventilation window can be provided between the first cabinet 510 and the second cabinet 520. The air circulation device 600 can blow relatively dry air into the second cabinet 520 to reduce the ambient humidity value in the second cabinet 520.

A cold plate 900 may also be provided in the energy storage cabinet. The cold plate 900 has a circulation channel for loading a medium such as an ethylene glycol aqueous solution. The ethylene glycol aqueous solution circulating in the cold plate 900 may flow into the heat exchanger 100 to exchange heat with the low-temperature refrigerant. The low-temperature ethylene glycol aqueous solution flows out of the heat exchanger 100 and enters a plurality of cold plates 900 respectively. The low-temperature ethylene glycol aqueous solution in the cold plate 900 reduces the temperature of the energy storage battery 400. Referring to FIG. 1 , the cold plate 900 may be attached between two adjacent energy storage batteries 400 and attached to the shell of the energy storage battery 400 to dissipate heat from the energy storage battery 400. It should be noted that the cold plate 900 may be a partial component of the heat exchange device described in the present application. The cold plate 900, the heat exchanger 100, the condenser 700, the compressor 800, etc. are sold and used as a whole; the cold plate 900 may also be a component other than the heat exchange device described in the present application and does not belong to the heat exchange device described in the present application.

Referring to Figures 2 and 3, a partition 200 is provided in the heat exchanger 100, wherein the heat exchanger 100 can be a heat exchange plate or a heat exchange plate having a refrigerant channel 110 to form a tubular heat exchanger (including a coil structure that extends reciprocatingly and is bent) or a plate heat exchanger. Figures 2 and 3 only exemplarily show the pipeline form of the heat exchanger 100, and schematically show that the heat exchanger 100 is divided into two parts by the partition 200, and do not limit the heat exchanger 100 described in the present application to only the shape described in Figures 2 or 3.

The separator 200 may be located in the heat exchanger 100 to separate the heat exchanger 100 into two parts, namely, the first heat exchange part 100a and the second heat exchange part 100b. The separator 200 may be located entirely in the heat exchanger 100, or may partially pass through the tube wall of the heat exchanger 100, with one part located inside the heat exchanger 100 and the other part located outside the heat exchanger 100. The separator 200 may separate the refrigerant channel 110 in the heat exchanger 100 into two parts, namely, the first refrigerant channel 110a and the second refrigerant channel 110b, wherein the first refrigerant channel 110a is located in the first heat exchange part 100a and the second refrigerant channel 110b is located in the second heat exchange part 100b.

3, the first refrigerant channel 110a is connected to the first refrigerant inlet pipe 120a and the first refrigerant outlet pipe 130a respectively, and the second refrigerant channel 110b is connected to the second refrigerant inlet pipe 120b and the second refrigerant outlet pipe 130b respectively. A throttling device 300 may be provided on the first refrigerant inlet pipe 120a and the second refrigerant inlet pipe 120b.

Referring to Figures 4 and 1, the first inlet end 120c of the first refrigerant inlet pipe 120a and the second refrigerant inlet pipe 120b can be both connected to the second outlet end 700b of the condenser 700, the second inlet end 700a of the condenser 700 is connected to the third outlet end 800b of the compressor 800, and the first outlet end 130c of the first refrigerant outlet pipe 130a and the second refrigerant outlet pipe 130b can be both connected to the third inlet end 800a of the compressor 800. The high-temperature and high-pressure refrigerant compressed by the compressor 800 is discharged from the third outlet port 800b and enters the condenser 700 for condensation and heat dissipation. The refrigerant discharged from the condenser 700 enters the first heat exchange part 100a and the second heat exchange part 100b through the first refrigerant inlet pipe 120a and the second refrigerant inlet pipe 120b respectively. When the refrigerant passes through the throttling device 300 provided on the first refrigerant inlet pipe 120a and the second refrigerant inlet pipe 120b, the refrigerant pressure is reduced, so that the temperature of the refrigerant drops rapidly (to about 10 degrees). ), the low-temperature refrigerant enters the first heat exchange part 100a and the second heat exchange part 100b respectively, so as to exchange heat with the energy storage battery in the energy storage device and the air around the energy storage battery respectively. The first heat exchange part 100a and the energy storage battery 400 exchange heat through the cold plate 900, which can reduce the temperature of the energy storage battery. The second heat exchange part 100b can reduce the humidity value of the ambient air, and can blow relatively dry gas into the environment where the energy storage battery is located through a fan or other device to reduce the humidity of the air around the energy storage battery. Among them, the air outlet of the fan or other wind circulation device faces the second heat exchange part of the energy storage device, and the wind blown by the fan can be blown straight to the second heat exchange part to increase the circulation speed of the air around the second heat exchange part, and improve the efficiency of the second heat exchange part in reducing the air humidity in the energy storage cabinet where the energy storage battery is located. The first heat exchange part 100a described in the present application can be directly connected to the energy storage battery to reduce the temperature of the energy storage battery; it can also perform indirect heat exchange through the cold plate 900 as shown in Figure 1, and the first heat exchange part 100a performs heat exchange with the medium such as the ethylene glycol aqueous solution in the cold plate 900, and the low-temperature ethylene glycol aqueous solution flows into the cold plate 900, and the cold plate 900 is connected to the energy storage battery, and the low-temperature cold plate 900 can reduce the temperature of the energy storage battery.

The first heat exchange part 100a and the second heat exchanger 100b can share a compressor and condenser system, and the compressor, condenser and heat exchanger can constitute a refrigerant compression refrigeration cycle pipeline (the refrigeration cycle pipeline can also include components such as a throttling device). In this embodiment, compared with setting two heat exchangers to dissipate heat and dehumidify respectively, the heat exchanger 100 of this embodiment is divided into two heat exchange parts by a partition 200 to respectively constitute a refrigeration device for the energy storage battery and a dehumidification device for the energy storage battery. The dual cooling of the energy storage battery temperature and the humidity of the environment in which the energy storage battery is located can be achieved through a single heat exchange component. In addition, the first heat exchange part and the second heat exchange part are an integral device. Only one installation position needs to be set in the power storage system to install the first heat exchange part and the second heat exchange part simultaneously. The installation position is reduced, the installation is more convenient, and the installation space and installation cost are saved. In addition, the first heat exchange part and the second heat exchange part are two parts separated from the same heat exchanger. During preparation, only one process such as brazing is required to prepare a heat exchanger with both cooling and dehumidification functions at one time. The preparation process of the heat exchanger with dehumidification function is simpler; in addition, the distance between the first heat exchange part and the second heat exchange part is shortened, and the piping routing between the compressor and other refrigeration modules and the heat exchange parts is simpler, which can reduce the length of the piping; the dehumidification function of the energy storage cabinet space and the cooling function of the battery thermal management are combined into one, which can save the number of parts. For example, only two end covers are needed to seal the heat exchange tube openings of the heat exchanger, which is half the number of end covers required for two separate heat exchangers, thereby achieving the purpose of improving manufacturing efficiency and reducing costs.

In a possible implementation, as shown in FIG5 , the heat exchanger 100 includes a first liquid distributing pipe 140, a heat exchange plate 150, and a second liquid distributing pipe 160. The heat exchange plate 150 is located between the first liquid distributing pipe 140 and the second liquid distributing pipe 160. The inner cavity of the first liquid distributing pipe 140, the inner cavity of the heat exchange plate 150, and the inner cavity of the second liquid distributing pipe 160 are sequentially connected.

The separator 200 includes a first separator 210 and a second separator 220 . The first separator 210 separates the first liquid dispensing tube 140 into a first liquid dispensing portion 141 and a second liquid dispensing portion 142 . The second separator 220 separates the second liquid dispensing tube 160 into a third liquid dispensing portion 161 and a fourth liquid dispensing portion 162 .

The heat exchange plate 150 includes a first heat exchange plate 151 and a second heat exchange plate 152. The first heat exchange plate 151 is connected between the first liquid separation part 141 and the third liquid separation part 161, and the second heat exchange plate 152 is connected between the second liquid separation part 142 and the fourth liquid separation part 162. The first heat exchange part 100a includes the first liquid separation part 141, the first heat exchange plate 151 and the third liquid separation part 161, and the second heat exchange part 100b includes the second liquid separation part 142, the second heat exchange plate 152 and the fourth liquid separation part 162.

In one embodiment, the first direction is the direction from the first liquid dispensing tube 140 toward the second liquid dispensing tube 160, which is consistent with the X-axis direction shown in FIG5. The first heat exchange plate 151 and the second heat exchange plate 152 may be spaced apart in a direction perpendicular to the first direction (the Y-axis direction in FIG5), and there may be a gap between the first heat exchange plate 151 and the second heat exchange plate 152, so that the first heat exchange plate 151 and the second heat exchange plate 152 are relatively independent and no heat exchange occurs.

Among them, the first liquid dispensing tube 140 can be a cylindrical tube, and the shape can be a cylindrical shape as shown in Figure 5, or a prism shape such as a triangular prism, a quadrangular prism or a pentagonal prism. The present application takes the cylindrical first liquid dispensing tube 140 as an example. It should be noted that the shape of the second liquid dispensing tube 160 can also be cylindrical or prism-shaped, and the shape of the second liquid dispensing tube 160 can be the same as the shape of the first liquid dispensing tube 140, or it can be different. The present application takes the first liquid dispensing tube 140 and the second liquid dispensing tube 160 as an example in which the shapes are the same and both are cylindrical. The shape of the heat exchange plate 150 can be plate-shaped to form a plate heat exchanger to improve the heat exchange efficiency of the heat exchanger 100. In this embodiment, the height value of the first liquid dispensing tube 140 and the second liquid dispensing tube 160 in the Z direction (corresponding to the diameter of the first liquid dispensing tube 140 and the second liquid dispensing tube 160 in Figure 5) is greater than the height value of the heat exchange plate 150 in the Z direction (corresponding to the thickness value of the heat exchange plate 150 in Figure 5).

During preparation, the first liquid distributor 140, the heat exchange plate 150 and the second liquid distributor 160 are pre-formed separately. The first liquid distributor 140 and the second liquid distributor 160 can be made into the shape of a collecting tube 170 as shown in Figure 15. In one embodiment, the collecting tube 170 can be a cylindrical tube body, and a through hole is set on one side of the collecting tube 170. The through hole is used for inserting the heat exchange plate 150, and the heat exchange plate 150 is to pass through the through hole and inserted into a part of the inner part of the collecting tube 170, so as to achieve a sealed connection between the collecting tube 170 and the heat exchange plate 150 by brazing. The through hole includes a first through hole 171 and a second through hole 172, the first through hole 171 is used to connect the first heat exchange plate, the second through hole 172 is used to connect the second heat exchange plate, and the first heat exchange plate can pass through the first through hole 171 and be inserted into a part of the interior of the header 170, the first heat exchange plate and the hole wall of the first through hole 171 are integrally welded by a high-temperature brazing furnace, the heat exchange tube can pass through the second through hole 172 and be inserted into a part of the interior of the header 170, and the hole wall of the heat exchange tube and the second through hole 172 are integrally welded by a high-temperature brazing furnace. The height value of the first liquid distributor 140 and the second liquid distributor 160 in the Z direction (corresponding to the diameter of the first liquid distributor 140 and the second liquid distributor 160 in FIG. 5) is greater than the height value of the heat exchange plate 150 in the Z direction (corresponding to the thickness value of the heat exchange plate 150 in FIG. 5), so that the heat exchange plate 150 can be inserted into a part of the first liquid distributor 140 and the second liquid distributor 160 for brazing.

During preparation, the first liquid-distributing tube 140 can be prepared as a pipeline having a hollow cavity, and a first separator 210 is arranged in the first liquid-distributing tube 140. The first separator 210 separates the hollow cavity of the first liquid-distributing tube 140 into a first liquid-distributing portion 141 and a second liquid-distributing portion 142. The first liquid-distributing portion 141 belongs to a part of the first liquid-distributing tube of the first heat exchange portion 100a, and the second liquid-distributing portion 142 belongs to a part of the first liquid-distributing tube of the second heat exchange portion 100b. The first separator 210 separates and isolates the inner cavity of the first liquid-distributing portion 141 from the inner cavity of the second liquid-distributing portion 142. The first liquid-distributing tube 140 can be an integrated structure with the first separator 210. For example, the first separator 210 can be welded in the first liquid-distributing tube 140, and can be welded in the liquid-distributing tube together when the liquid-distributing tube is brazed, without increasing the complexity of the preparation process.

The first liquid separation part 141 is connected to a first refrigerant inlet pipe 120a, which is in communication with the inner cavity of the first liquid separation part 141, so that refrigerant is injected into the first liquid separation part 141 to reduce the temperature of the first liquid separation part 141. The second liquid separation part 142 is connected to a second refrigerant inlet pipe 120b, which is in communication with the inner cavity of the second liquid separation part 142, so that refrigerant is injected into the second liquid separation part 142 to reduce the temperature of the second liquid separation part 142.

Similar to the first liquid dispensing tube 140, the second liquid dispensing tube 160 can be prepared as a pipeline with a hollow cavity, and a second partition 220 is arranged in the second liquid dispensing tube 160, and the second partition 220 divides the hollow cavity of the second liquid dispensing tube 160 into a third liquid dispensing portion 161 and a fourth liquid dispensing portion 162. The third liquid dispensing portion 161 and the first liquid dispensing portion 141 both belong to the first heat exchange portion 100a, and the fourth liquid dispensing portion 162 and the second liquid dispensing portion 162 are respectively connected to the first heat exchange portion 100a and the fourth liquid dispensing portion 162. The liquid separation part 142 belongs to the second heat exchange part 100b. The second separator 220 separates and isolates the inner cavity of the third liquid separation part 161 and the inner cavity of the fourth liquid separation part 162, and the second liquid separation tube 160 can be an integrated structure with the second separator 220. For example, the second separator 220 can be welded in the second liquid separation tube 160, and can be welded in the liquid separation tube when the liquid separation tube is brazed, without increasing the complexity of the preparation process.

The third liquid separation part 161 is connected to a first refrigerant outlet pipe 130a, the first refrigerant outlet pipe 130a is in communication with the inner cavity of the third liquid separation part 161, and the refrigerant after heat exchange in the first heat exchange part 100a can be returned to the compressor through the first refrigerant outlet pipe 130a. The fourth liquid separation part 162 is connected to a second refrigerant outlet pipe 130b, the second refrigerant outlet pipe 130b is in communication with the inner cavity of the fourth liquid separation part 162, and the refrigerant after heat exchange in the second heat exchange part 100b can be returned to the compressor through the second refrigerant outlet pipe 130b.

As shown in FIG. 11 , the second inner cavity 112 of the first liquid separation part 141, the second inner cavity 112 of the first heat exchange plate 151 and the second inner cavity 112 of the third liquid separation part 161 are connected in sequence and constitute the first refrigerant channel 110a. The first heat exchange plate 151 is connected between the first liquid separation part 141 and the third liquid separation part 161. The first heat exchange plate 151 can be a plate-type heat exchange plate. The two side planes of the first heat exchange plate 151 have a large surface area, so that the first heat exchange plate 151 has a good heat exchange efficiency. The low-temperature refrigerant can enter the first liquid separation part 141 through the first refrigerant inlet pipe 120a, and then enter the first heat exchange plate 151 through the first liquid separation part 141. Through the large heat exchange area of the first heat exchange plate 151, heat exchange is performed on the contacted medium such as ethylene glycol aqueous solution. The heat exchanged medium enters the cold plate to reduce the temperature of the energy storage battery. The refrigerant after heat exchange in the first heat exchange plate 151 flows into the third liquid separation portion 161 and returns to the compressor via the third liquid separation portion 161 to form a circulating refrigeration of the refrigerant in the first heat exchange portion 100a.

As shown in FIG. 7 , the second heat exchange plate 152 is connected between the second liquid separation part 142 and the fourth liquid separation part 162, and the inner cavity of the second liquid separation part 142, the inner cavity of the second heat exchange plate 152 and the inner cavity of the fourth liquid separation part 162 are sequentially connected to form the second refrigerant channel 110b. The second heat exchange plate 152 can be a tubular heat exchange plate, and a fin structure is connected between adjacent heat exchange tubes of the tubular heat exchange plate. The second heat exchange plate 152 can have multiple ventilation channels, and can be equipped with a fan or other wind circulation device to accelerate the circulation between the surrounding air and the second heat exchange plate 152. The surrounding air can exchange heat with the second heat exchange plate 152 to reduce the temperature of the surrounding air, and condense into water droplets when the dew point is reached, thereby reducing the humidity value of the surrounding air of the second heat exchange part 100b.

Among them, the low-temperature refrigerant can enter the second liquid separation part 142 through the second refrigerant inlet pipe 120b, and then enter the second heat exchange plate 152 through the second liquid separation part 142. The temperature of the surrounding air is reduced to reduce the humidity value of the surrounding air through the larger heat exchange area of the second heat exchange plate 152, and then the relatively dry gas is blown into the space where the energy storage battery is located to reduce the humidity value around the energy storage battery. The refrigerant after heat exchange in the second heat exchange plate 152 flows into the fourth liquid separation part 162, and returns to the compressor through the fourth liquid separation part 162 to form a circulating refrigeration of the refrigerant in the second heat exchange part 100b.

In this embodiment, the first liquid-distributing tube 140, the heat exchange plate 150 and the second liquid-distributing tube 160 are provided. The heat exchange plate 150 can be a plate-shaped tube to form a plate heat exchanger, thereby increasing the contact area between the refrigerant and the medium such as the ethylene glycol aqueous solution, and increasing the heat exchange efficiency between the heat exchanger and the cold plate. The first liquid-distributing tube 140 is divided into a first liquid-distributing part 141 and a second liquid-distributing part 142 by a separator 200, and the second liquid-distributing tube 160 is divided into a third liquid-distributing part 161 and a fourth liquid-distributing part 162. The first heat-distributing plate 151 is connected between the first liquid-distributing part 141 and the third liquid-distributing part 161, and the second heat-distributing plate 152 is connected between the second liquid-distributing part 142 and the fourth liquid-distributing part 162. The first liquid-distributing part 141, the first heat-distributing plate 151 and the third liquid-distributing part 161 constitute the first heat-exchanging part 100a, and the first heat-exchanging part 100a can be used to dissipate heat for the energy storage battery. The second liquid separation part 142, the second heat exchange plate 152 and the fourth liquid separation part 162 constitute the second heat exchange part 100b, which can be used to cool the air around the energy storage battery to reduce the humidity of the air around the energy storage battery. The first heat exchange part 100a and the second heat exchange part 100b can work independently, and the first heat exchange part 100a and the second heat exchange part 100b are an integral structure.

In one embodiment, referring to FIG6 , FIG6 is a cross-sectional schematic diagram of A-A in FIG5 , and FIG6 shows an internal cross-sectional schematic diagram of the first heat exchange part 100a in FIG5 . The first liquid separation part 141 may include a first refrigerant tube 1411, the first heat exchange plate 151 may include a second refrigerant tube 1511, and the third liquid separation part 161 may include a third refrigerant tube 1611. The inner cavity of the first refrigerant tube 1411, the inner cavity of the second refrigerant tube 1511, and the inner cavity of the third refrigerant tube 1611 are sequentially connected to form a first refrigerant channel 110a.

In this embodiment, the first liquid-separating portion 141 of the first liquid-separating pipe may be a first refrigerant pipe 1411, and the internal cavity of the first refrigerant pipe 1411 constitutes a portion of the first refrigerant channel 110a of the first liquid-separating portion 141. The first heat exchange plate 151 may be a second refrigerant pipe 1511, and the internal cavity of the second refrigerant pipe 1511 constitutes a portion of the first refrigerant channel 110a of the first heat exchange plate 151. The third liquid-separating portion 161 of the second liquid-separating pipe may be a third refrigerant pipe 1611, and the internal cavity of the third refrigerant pipe 1611 constitutes a portion of the first refrigerant channel 110a of the third liquid-separating portion 161.

In this embodiment, the left side of the first refrigerant tube 1411 is connected to the second refrigerant tube 1511, and the right side of the first refrigerant tube 1411 is connected to the first refrigerant inlet tube 120a. The right side of the third refrigerant tube 1611 is connected to the second refrigerant tube 1511, and the left side of the third refrigerant tube 1611 is connected to the first refrigerant outlet tube 130a. The refrigerant can directly flow through the first refrigerant channel 110a in the first liquid separation part 141, the first heat exchange plate 151 and the third liquid separation part 161, and the refrigerant can directly exchange heat with the first liquid separation tube, the first heat exchange plate 151 and the second liquid separation tube.

In this embodiment, the first heat exchange part can be directly in contact with the device that needs to be cooled, such as the energy storage battery, and the low temperature flowing in the first heat exchange part The warm and cold medium can exchange heat with the energy storage battery to reduce the temperature of the energy storage battery.

In one embodiment, as shown in FIG. 7 , the left side of the second liquid-separating portion 142 is connected to the second heat exchange plate 152, and the right side of the second liquid-separating portion 142 is connected to the second refrigerant inlet pipe 120b. The right side of the fourth liquid-separating portion 162 is connected to the second heat exchange plate 152, and the left side of the fourth liquid-separating portion 162 is connected to the second refrigerant outlet pipe 130b. The inner cavity of the second liquid-separating portion 142, the second heat exchange plate 152 and the fourth liquid-separating portion 162 constitutes the refrigerant channel of the second heat exchange portion. The refrigerant enters the refrigerant channel of the second heat exchange portion from the second refrigerant inlet pipe 120b, and can perform heat exchange with the air around the energy storage battery through the second heat exchange plate 152 to reduce the humidity value of the surrounding air. After the heat exchange, the refrigerant can be returned to the compressor through the second refrigerant outlet pipe 130b.

In one embodiment, as shown in FIG8 , the first heat exchange plate 151 can be composed of a plurality of second sub-cavities 151b arranged side by side. For example, a plurality of first partition plates 151a can be arranged in the first heat exchange plate 151, and the first partition plates 151a extend from one side of the first liquid separation part to one side of the third liquid separation part. The plurality of first partition plates 151a divide the first heat exchange plate 151 into a plurality of second sub-cavities 151b, and the plurality of second sub-cavities 151b are arranged in sequence along the left and right directions shown in FIG8 . And both ends of each second sub-cavity 151b are respectively connected to the second cavity of the first liquid separation part and the second cavity of the third liquid separation part. The refrigerant flowing into the first refrigerant inlet pipe can enter each second sub-cavity 151b through the first liquid separation part, and heat exchange is performed through the plurality of second sub-cavities 151b and the medium such as ethylene glycol aqueous solution. The refrigerant after heat exchange is collected in the third liquid separation part and returned to the compressor through the first refrigerant outlet pipe.

In this embodiment, the first liquid distributing portion 141 of the first liquid distributing tube 140 and the third liquid distributing portion 161 of the second liquid distributing tube 160 can be used as liquid distributing tubes of the plurality of second sub-inner cavities 151 b to evenly distribute the refrigerant in all the second sub-inner cavities 151 b.

5 and 8 , the second heat exchange plate 152 may be composed of a plurality of heat exchange tubes 152a, wherein the heat exchange tubes 152a are spaced apart by a certain gap, and fins 152b are provided in the gaps. The fins 152b may connect two adjacent heat exchange tubes 152a, and the coldness of the refrigerant flowing through the heat exchange tubes 152a may be more efficiently exchanged with the surrounding air through the fins.

The two ends of the plurality of heat exchange tubes 152a are connected to the inner cavity of the second liquid separation part and the inner cavity of the fourth liquid separation part. In this embodiment, the second liquid separation part 142 of the first liquid separation tube 140 and the fourth liquid separation part 162 of the second liquid separation tube 160 can be used as liquid separation tubes of the plurality of heat exchange tubes 152a to evenly distribute the refrigerant in all the heat exchange tubes 152a.

In one embodiment, referring to FIG. 9 , the first liquid dispensing tube 140 is divided into a first liquid dispensing portion 141 and a second liquid dispensing portion 142 by a first partition 210. The first partition 210 may be a sealing plate disposed in the first liquid dispensing tube 140. The first partition 210 and the first liquid dispensing tube 140 are an integrated structure. The sealing plate may be welded to the inner wall of the first liquid dispensing tube 140 to separate the first liquid dispensing portion 141 and the second liquid dispensing portion 142 into two relatively sealed components, and the inner cavity of the first liquid dispensing portion 141 and the inner cavity of the second liquid dispensing portion 142 are two non-circulating cavities.

In one embodiment, as shown in FIG. 10 , the second liquid dispensing tube 160 is divided into a third liquid dispensing portion 161 and a fourth liquid dispensing portion 162 by a second partition 220. The second partition 220 may be a sealing plate disposed in the second liquid dispensing tube 160. The second partition 220 and the second liquid dispensing tube 160 are an integrated structure. The sealing plate may be welded to the inner wall of the second liquid dispensing tube 160 to separate the third liquid dispensing portion 161 and the fourth liquid dispensing portion 162 into two relatively sealed components, and the inner cavity of the third liquid dispensing portion 161 and the inner cavity of the fourth liquid dispensing portion 162 are two non-circulating cavities.

In some possible embodiments, as shown in FIG. 11 , the first refrigerant tube 1411 may be a refrigerant tube disposed inside the first liquid separation portion 141, the inner cavity of the first refrigerant tube 1411 is the second inner cavity 112 of the first liquid separation portion 141, a first channel 181 is provided between the first liquid separation portion 141 and the first refrigerant tube 1411, the first channel 181 and the first refrigerant channel inside the first refrigerant tube 1411 do not circulate, and the first channel 181 is a part of the first inner cavity 11. In this embodiment, the first refrigerant tube 1411 is a round tube disposed inside the first liquid separation portion 141, the first channel 181 is a gap channel surrounding the periphery of the first refrigerant tube 1411, and the first inner cavity 111 in the first liquid separation portion 141 is located at the periphery of the second inner cavity 112.

Similarly, referring to Figures 11 and 12, the second refrigerant tube 1511 is a refrigerant tube arranged inside the first heat exchange plate 151, the inner cavity of the second refrigerant tube 1511 is the second inner cavity 112 of the first heat exchange plate 151, the second inner cavity 112 of the second refrigerant tube 1511 is connected to the second inner cavity 112 of the first refrigerant tube 1411, and a second channel 182 is provided between the first heat exchange plate 151 and the second refrigerant tube 1511, and the second channel 182 is a part of the first inner cavity 111. In this embodiment, the first heat exchange plate 151 is plate-shaped, the inner cavity of the first heat exchange plate 151 is a plate-shaped inner cavity, the second refrigerant tube 1511 in the first heat exchange plate 151 is also plate-shaped, and the second refrigerant tube 1511 separates the inner cavity of the first heat exchange plate 151, the second channel 182 is located at the upper and lower sides of the second refrigerant tube 1511, and the first inner cavity 111 in the first heat exchange plate 151 is located at both sides of the second inner cavity 112 in the first heat exchange plate 151. Specifically, the first channel 181 is an annular channel surrounding the outside of the first refrigerant tube 1411 (viewing angle shown in FIG. 11), and the right end of the second refrigerant tube 1511 is inserted into the first liquid separation part 141, so that the first channel 181 and the second channel 182 are connected.

The third refrigerant tube 1611 is a refrigerant tube disposed inside the third liquid separation part 161. The inner cavity of the third refrigerant tube 1611 is the second inner cavity 112 of the third liquid separation part 161. A third channel 183 is provided between the third liquid separation part 161 and the third refrigerant tube 1611. It can be a part of the first inner cavity 112, and the third channel 183 and the first refrigerant channel 110a inside the third refrigerant tube 1611 do not flow. In this embodiment, the third refrigerant tube 1611 is a round tube arranged in the third liquid separation part 161, the third channel 183 is a gap channel surrounding the periphery of the third refrigerant tube 1611, and the first inner cavity 111 in the third liquid separation part 161 is located at the periphery of the second inner cavity 112 in the third liquid separation part 161.

Referring to FIG. 5 , FIG. 13 and FIG. 14 , the first channel 181 is also connected to the liquid outlet pipe 184, which is connected to the tube wall of the first liquid separation part 141 and is connected to the first inner cavity 111 in the first liquid separation part 141 (specifically connected to the first channel 181). The third channel 183 is also connected to the liquid inlet pipe 185, which is connected to the tube wall of the third liquid separation part 161 and is connected to the first inner cavity 111 in the third liquid separation part 161 (specifically connected to the third channel 183). The liquid outlet pipe 184, the first channel 181, the second channel 182, the third channel 183 and the liquid inlet pipe 185 are in circulation with each other to form the third refrigerant channel 110c of the first heat exchange part. A medium such as a 50% ethylene glycol aqueous solution can flow through the third refrigerant channel. The third refrigerant channel 110 c includes the first inner cavity 111 in the first liquid separation portion 141 , the first inner cavity 111 in the first heat exchange plate 151 , and the first inner cavity 111 in the third liquid separation portion 161 .

Low-temperature refrigerant flows in the refrigerant channel. The first refrigerant inlet pipe 120a passes through the first liquid separation part 141 and is connected to the first refrigerant pipe 1411 in the first liquid separation part 141; the first refrigerant outlet pipe 130a passes through the third liquid separation part 161 and is connected to the third refrigerant pipe 1611 in the third liquid separation part 161. The inner cavities of the first refrigerant inlet pipe 120a, the first refrigerant pipe 1411, the second refrigerant pipe 1511, the third refrigerant pipe 1611 and the first refrigerant outlet pipe 130a flow with each other to form the first refrigerant channel of the first heat exchange part. The low-temperature refrigerant reduced in pressure by the throttling device flows in the first refrigerant channel. A third refrigerant channel is provided outside the first refrigerant channel, and the first refrigerant channel and the second refrigerant channel are arranged adjacent to each other. The medium such as the ethylene glycol aqueous solution flowing in the third refrigerant channel is cooled by the low-temperature refrigerant flowing in the first refrigerant channel. The cooled medium such as the ethylene glycol aqueous solution can flow into the cold plate and perform heat exchange with the contacting energy storage battery through the cold plate.

As shown in FIG11 , the flow direction of the low-temperature refrigerant in the second refrigerant tube 1511 (the arrow pointing to the left in FIG11 ) is opposite to the flow direction of the ethylene glycol aqueous solution outside the second refrigerant tube 1511 (the arrow pointing to the right in FIG11 ), so as to improve the heat exchange efficiency between the refrigerant in the refrigerant tube and the ethylene glycol aqueous solution and other media. It should be noted that the inlet and outlet described in this application refer to the inlet and outlet ends of the refrigerant in a certain flow direction, and do not limit the first liquid dispensing tube or liquid inlet in the application to only be able to take in liquid, nor do they limit the second liquid dispensing tube or liquid outlet in this application to only be able to discharge liquid, and are specifically set according to the flow direction.

The heat exchange device provided in this embodiment can constitute an indirect heat exchange refrigeration system of the refrigerant and the intermediate medium (ethylene glycol aqueous solution), which can be safer when cooling the energy storage battery. Specifically, when the refrigerant is transformed between the liquid phase and the gas phase, an unbalanced gas-liquid transformation is likely to occur, resulting in an uneven flow of the refrigerant in the refrigerant pipeline, and a large temperature difference in the refrigerant pipeline. When directly cooling the energy storage battery, etc., it causes a large temperature change, which affects the temperature uniformity of the battery. The present application adopts an indirect heat exchange refrigeration system, and the intermediate medium (ethylene glycol aqueous solution) is a single-phase medium, there is no phase change, the temperature distribution is uniform, and the temperature uniformity of the energy storage battery is good.

In one embodiment, the third refrigerant channel formed by the liquid outlet pipe 184, the first inner cavity 111 and the liquid inlet pipe 185 connected in sequence is also connected to a circulation pump, and the circulation pump can drive the ethylene glycol aqueous solution in the third refrigerant channel to circulate.

In one embodiment, as shown in FIG. 12, the first heat exchange plate 151 has a first partition plate 151a and a second partition plate 151c. The first partition plate 151a divides the second inner cavity 112 in the first heat exchange plate 151 into a plurality of second sub-inner cavities 151b, and the second partition plate 151c divides the first inner cavity 111 in the first heat exchange plate 151 into a plurality of first sub-inner cavities 151d. The two ends of the plurality of second sub-inner cavities 151b are respectively connected to the second inner cavity of the first liquid separation part and the second inner cavity of the third liquid separation part to form a connected first refrigerant channel; the two ends of the plurality of first sub-inner cavities 151d are respectively connected to the first inner cavity of the first liquid separation part and the first inner cavity of the third liquid separation part to form a connected third refrigerant channel. In this embodiment, the first partition plate 151a and the second partition plate 151c can be arranged one-to-one in the Z direction shown in FIG. 12 to form a plurality of first sub-inner cavities 151d and a plurality of second sub-inner cavities 151b arranged one-to-one in the Z direction.

In one embodiment, referring to FIG. 18 , the first partition plate 151 a and the second partition plate 151 c may be staggered along the Y direction to form a structure in which the first sub-inner cavity 151 d and the second sub-inner cavity 151 b are staggered along the Y direction.

In one embodiment, as shown in FIG. 16 , the liquid outlet pipe 184 can be connected to the arcuate side wall of the tube wall of the first liquid separation part 141, the arcuate side wall of the tube wall of the first liquid separation part 141 is provided with a through hole, one end of the liquid outlet pipe 184 is sealedly connected to the through hole on the arcuate side wall, and the liquid outlet pipe 184 is in communication with the first channel 181 of the first liquid separation part 141. The liquid inlet pipe 185 can be connected to the arcuate side wall of the tube wall of the third liquid separation part 161, the arcuate side wall of the tube wall of the third liquid separation part 161 is provided with a through hole, one end of the liquid inlet pipe 185 is sealedly connected to the through hole on the arcuate side wall, and the liquid inlet pipe 185 is in communication with the third channel 183 of the third liquid separation part 161.

In some possible implementations, the pipeline connections in the above embodiments, such as the liquid outlet pipe 184, the first channel 181, the second channel 182, the third channel 183 and the liquid inlet pipe 185, can be integrally welded by a high-temperature brazing furnace.

The present application also provides an energy storage device, as shown in FIG1, comprising an energy storage battery 400 and any of the heat exchange devices described above. The energy storage device provided by the present application can be applied to the new energy smart microgrid field, the power transmission and distribution field, or the new energy field (such as the photovoltaic grid-connected field). Or wind power grid-connected field), photovoltaic power generation field (such as power supply to household appliances (such as refrigerators, air conditioners) or power grid), or wind power generation field, or high-power converter field (such as converting direct current into high-power high-voltage alternating current) and many other application fields, which can be determined according to the actual application scenario and are not limited here. The energy storage device provided in this application can be adapted to different application scenarios, such as photovoltaic energy storage power supply application scenarios, wind energy storage power supply application scenarios, pure energy storage application scenarios or other energy storage power supply application scenarios. The photovoltaic energy storage power supply application scenario will be taken as an example for explanation below, and no further details will be given below.

Referring to FIG. 17, FIG. 17 is a schematic diagram of an application scenario of the energy storage device provided in the present application. In the light energy storage power supply application scenario, as shown in FIG. 17, the energy storage device includes an energy storage cabinet 500, a power generation device 910 (for example, a photovoltaic power generation device), an inverter 920, a transformer 930, a power grid 940 (or other power equipment) and a converter 950. Among them, the power generation device 910 is connected to the energy storage cabinet 500 through an inverter 920 and a converter 950, and the energy storage cabinet 500 is connected to the power grid 940 through a converter 950 and a transformer 930. When the power consumption of the power grid 940 is low, the power generation device 910 can simultaneously supply energy to the energy storage cabinet 500 and the power grid 940. At this time, the energy storage cabinet 500 can receive and store the electric energy transmitted by the power generation device 910 through the converter 950 and the inverter 920. When the power consumption of the power grid 940 is high, the power generation device 910 and the energy storage cabinet 500 can simultaneously supply energy to the power grid 940 . At this time, the energy storage cabinet 500 can transmit its stored energy to the power grid 940 through the converter 950 and the transformer 930 .

In some possible implementations, the energy storage cabinet 500 may also receive electric energy transmitted from the power grid 940 through the converter 950 and the transformer 930. It is understood that in some pure energy storage application scenarios (for example, when there is no power generation device 910 and inverter 920 in the system), the energy storage cabinet 500 may also be used as a power supply device to supply power to the power grid 940 through the converter 950 and the transformer 930. It is further understood that in some pure energy storage application scenarios (for example, when there is no power generation device 910 and inverter 920 in the system), the energy storage cabinet 500 may also receive electric energy transmitted from the power grid 940 through the converter 950 and the transformer 930.

In the application scenario shown in FIG. 17 , the energy storage cabinet 500 includes the heat exchange device described in any of the above embodiments, at least one energy storage battery 400 (which may be a battery pack) and at least one DC-DC converter. The energy storage battery 400 may be connected to the heat exchanger 100 of the heat exchange device, and the DC-DC converter may be connected to the power grid 940 through the converter 950 and the transformer 930. Here, multiple energy storage batteries 400 may be integrated into a battery cluster, a DC-DC converter may perform current conversion corresponding to one battery cluster, and a DC-DC converter may also perform current conversion corresponding to multiple battery clusters. It can be understood that when the temperature of the battery cell in the energy storage battery 400 is too high or too low, it may cause the various components (e.g., the energy storage battery 400) in the energy storage cabinet 500 to increase the loss and shorten the service life due to the high temperature, or cause the various components (e.g., the energy storage battery 400) in the energy storage cabinet 500 to be unable to provide sufficient supply voltage due to the low temperature. At this time, the above-mentioned heat exchange device can circulate low-temperature refrigerant to exchange heat with the battery cells in the energy storage battery 400, thereby increasing or decreasing the temperature of the battery cells; and when the humidity in the energy storage cabinet 500 is high, the heat exchanger 100 in the heat exchange device can also reduce the air humidity value in the energy storage cabinet 500 to ensure normal energy storage and power supply of the system. The system has a simple structure, is easy to integrate, has low temperature control cost, high system safety, and strong applicability.

In a possible embodiment, the energy storage device may also be a power storage system of a new energy vehicle, and the heat exchange device may cool and dehumidify the energy storage battery in the new energy vehicle.

The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims (11)

A heat exchange device, used to be arranged in an energy storage device, wherein the energy storage device comprises an energy storage cabinet and an energy storage battery located in the energy storage cabinet, characterized in that it comprises: A heat exchanger, wherein the heat exchanger has a refrigerant channel; A partition, located in the heat exchanger, the partition divides the heat exchanger into a first heat exchange part and a second heat exchange part; the first heat exchange part includes a first refrigerant channel and a third refrigerant channel, the second heat exchange part includes a second refrigerant channel, the first refrigerant channel is used to circulate refrigerant, the first refrigerant channel and the third refrigerant channel are adjacently arranged to dissipate heat from the medium in the third refrigerant channel, the third refrigerant channel is used to communicate with the inner cavity of a cold plate, the cold plate is used to contact the energy storage battery to dissipate heat from the energy storage battery, and the second heat exchange part is used to reduce the air humidity in the energy storage cabinet; The refrigerant pipe includes a liquid inlet pipe, a liquid outlet pipe, a first refrigerant inlet pipe, a first refrigerant outlet pipe, a second refrigerant inlet pipe and a second refrigerant outlet pipe, the first refrigerant channel is respectively connected to the first refrigerant inlet pipe and the first refrigerant outlet pipe, the second refrigerant channel is respectively connected to the second refrigerant inlet pipe and the second refrigerant outlet pipe, and the third refrigerant channel is respectively connected to the liquid inlet pipe and the liquid outlet pipe. The heat exchange device according to claim 1, characterized in that the heat exchanger comprises a first liquid distributing pipe, a heat exchange plate and a second liquid distributing pipe, wherein the heat exchange plate is located between the first liquid distributing pipe and the second liquid distributing pipe; The separator includes a first separator and a second separator, the first separator separates the first liquid dispensing tube into a first liquid dispensing portion and a second liquid dispensing portion, and the second separator separates the second liquid dispensing tube into a third liquid dispensing portion and a fourth liquid dispensing portion; The heat exchange plate comprises a first heat exchange plate and a second heat exchange plate; The first heat exchange part includes the first liquid separation part, the first heat exchange plate and the third liquid separation part, and the second heat exchange part includes the second liquid separation part, the second heat exchange plate and the fourth liquid separation part; The first refrigerant channel includes the second inner cavity of the first liquid separation part, the second inner cavity of the first heat exchange plate, and the second inner cavity of the third liquid separation part, which are connected in sequence; the second refrigerant channel includes the inner cavity of the second liquid separation part, the inner cavity of the second heat exchange plate, and the inner cavity of the fourth liquid separation part, which are connected in sequence; the third refrigerant channel includes the first inner cavity of the first liquid separation part, the first inner cavity of the first heat exchange plate, and the first inner cavity of the third liquid separation part, which are connected in sequence. The heat exchange device according to claim 2, characterized in that the first partition separates and isolates the inner cavity of the first liquid separation part and the inner cavity of the second liquid separation part, and the first liquid separation pipe and the first partition are an integrated structure; The second partition separates and isolates the inner cavity of the third liquid-separating portion and the inner cavity of the fourth liquid-separating portion, and the second liquid-separating tube and the second partition are in an integrated structure. The heat exchange device according to claim 2 or 3 is characterized in that the first direction is the direction from the first liquid distributing tube to the second liquid distributing tube, and the first heat exchange plate and the second heat exchange plate are spaced apart in a direction perpendicular to the first direction. The heat exchange device according to any one of claims 2 to 4, characterized in that: The first inner cavity in the first liquid separation part is located at the periphery of the second inner cavity in the first liquid separation part; The first inner cavity in the first heat exchange plate is located on both sides of the second inner cavity in the first heat exchange plate; The first inner cavity in the third liquid separating portion is located at the periphery of the second inner cavity in the third liquid separating portion. The heat exchange device according to any one of claims 2 to 5 is characterized in that the first inner cavity in the first heat exchange plate includes a plurality of first sub-cavities arranged side by side, and two ends of the plurality of first sub-cavities are respectively connected to the first inner cavity of the first liquid separation part and the first inner cavity of the third liquid separation part; or, the second inner cavity in the first heat exchange plate includes a plurality of second sub-cavities arranged side by side, and two ends of the plurality of second sub-cavities are respectively connected to the second inner cavity of the first liquid separation part and the second inner cavity of the third liquid separation part. The heat exchange device according to any one of claims 2 to 6 is characterized in that the second heat exchange plate comprises a plurality of heat exchange tubes, both ends of the plurality of heat exchange tubes are respectively connected to the inner cavity of the second liquid separation part and the inner cavity of the fourth liquid separation part, and there is a gap channel between two adjacent heat exchange tubes. The heat exchange device according to claim 7 is characterized in that the second heat exchange plate further comprises a fin, and the fin is connected between two adjacent heat exchange tubes. The heat exchange device according to any one of claims 1 to 8 is characterized in that a throttling device is provided on both the first refrigerant inlet pipe and the second refrigerant inlet pipe. An energy storage device, characterized in that it comprises an energy storage battery, a cold plate and a heat exchange device as described in any one of claims 1 to 9 above, wherein a third refrigerant channel of the heat exchange device is connected to an inner cavity of the cold plate, and the cold plate is in contact with the energy storage battery to dissipate heat from the energy storage battery. The energy storage device according to claim 10 is characterized in that the energy storage device includes an energy storage cabinet and an air circulation device, the energy storage battery, the air circulation device and the heat exchange device are all located in the energy storage cabinet, and the air outlet of the air circulation device faces the second heat exchange part of the energy storage device.