WO2012020941A2 - 신규한 구조의 전지팩 - Google Patents
신규한 구조의 전지팩 Download PDFInfo
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- WO2012020941A2 WO2012020941A2 PCT/KR2011/005677 KR2011005677W WO2012020941A2 WO 2012020941 A2 WO2012020941 A2 WO 2012020941A2 KR 2011005677 W KR2011005677 W KR 2011005677W WO 2012020941 A2 WO2012020941 A2 WO 2012020941A2
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- Prior art keywords
- flow path
- flow
- fluid
- battery
- battery pack
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/085—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
- F16K11/0856—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug having all the connecting conduits situated in more than one plane perpendicular to the axis of the plug
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/222—Inorganic material
- H01M50/224—Metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to a battery pack having a novel structure, and more particularly, a battery pack capable of controlling temperature, including a plurality of battery cells or unit modules ('unit cells') capable of charging and discharging. Or two or more battery modules; A fluid flow path configured to allow a fluid for cooling or heating the battery module to pass through the battery module; A flow conversion unit positioned on the fluid flow path and converting a flow direction of the fluid according to a temperature state of the battery module; And an operation controller for controlling the operation of the flow conversion unit based on the information on the temperature of the battery module.
- a battery pack capable of controlling temperature, including a plurality of battery cells or unit modules ('unit cells') capable of charging and discharging. Or two or more battery modules; A fluid flow path configured to allow a fluid for cooling or heating the battery module to pass through the battery module; A flow conversion unit positioned on the fluid flow path and converting a flow direction of the fluid according to a temperature state of the battery module; And an operation controller for controlling the operation of the flow conversion
- Secondary batteries capable of charging and discharging have been widely used as energy sources of wireless mobile devices. Secondary batteries are also attracting attention as a power source for electric vehicles (EVs) and hybrid electric vehicles (HEVs), which are proposed as a way to solve air pollution in conventional gasoline and diesel vehicles that use fossil fuels. .
- EVs electric vehicles
- HEVs hybrid electric vehicles
- One or two or four battery cells are used for small mobile devices, whereas medium and large battery modules, which are electrically connected to a plurality of battery cells, are used in medium and large devices such as automobiles due to the necessity of high output capacity.
- the medium-large battery module is preferably manufactured in a small size and weight
- the rectangular battery, the pouch-type battery, etc. which can be charged with high integration and have a small weight to capacity, are mainly used as battery cells of the medium-large battery module.
- a pouch-type battery using an aluminum laminate sheet or the like as an exterior member has attracted much attention in recent years due to advantages such as low weight, low manufacturing cost, and easy form deformation.
- the medium-large battery module In order for the medium-large battery module to provide the output and capacity required by a given device or device, it is necessary to electrically connect a plurality of battery cells in series and maintain a stable structure against external force.
- the battery cells constituting the medium-large battery module is composed of a secondary battery capable of charging and discharging, such a high output large capacity secondary battery generates a large amount of heat during the charging and discharging process. If this is not effectively removed, thermal buildup occurs and consequently accelerates the deterioration of the unit cell, and in some cases there is a risk of fire or explosion. Therefore, a vehicle battery pack that is a high output large capacity battery requires a cooling system for cooling the battery cells embedded therein.
- a battery module or battery pack consisting of a plate-shaped battery cell in which the electrode assembly of the anode / separator / cathode structure is built in the battery case of the laminate sheet including the resin layer and the metal layer as an automotive battery such as HEV, PHEV, EV, etc.
- a cooling system for keeping the cells below a certain temperature is very important.
- it is necessary to reduce the deterioration variation between batteries by setting the temperature variation between the batteries to a specific range or less to prevent the battery pack from rapidly decreasing its performance.
- the air flowing into the battery pack gradually increases as the battery surface is cooled, which is a battery located at the front and a rear of the battery pack.
- Such temperature control is required for cooling systems that eliminate heat insulation as well as for heating systems that provide heat to eliminate supercooled conditions.
- the present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
- the inventors of the present application after repeated experiments and in-depth studies on the battery pack, surprisingly, when placing the flow conversion unit on the fluid flow path for converting the flow direction of the fluid in accordance with the temperature state of the battery module, It was confirmed that the performance and lifespan of the battery pack can be greatly improved by maintaining the temperature of the battery pack uniformly with only the flow converting unit without greatly changing the structure of the present invention.
- the battery pack according to the present invention is a battery pack that can control the temperature
- One or more battery modules including a plurality of battery cells or unit modules ('unit cells') capable of charging and discharging;
- a fluid flow path configured to allow a fluid for cooling or heating the battery module to pass through the battery module
- a flow conversion unit positioned on the fluid flow path and converting a flow direction of the fluid according to a temperature state of the battery module;
- an operation control unit for controlling the operation of the flow conversion unit based on the information on the temperature of the battery module.
- the flow conversion unit is located on the fluid flow path to change the flow direction of the fluid in accordance with the temperature state of the battery module, only the flow conversion unit without changing the structure of the battery pack significantly The temperature of the pack can be kept uniform.
- the temperature variation between the batteries can be reduced by configuring a battery pack cooling system that changes the direction of the cooling path inside the battery pack by adding only a flow converter without changing the paths of the final inlet and the final outlet of the battery pack.
- the cooling direction can be flexibly changed according to the temperature difference between the battery located in the front part of the battery module and the battery part located in the rear part of the battery module, it is possible to maintain the temperature deviation between the desired battery with high accuracy.
- the method of stacking battery modules in battery pack design has limitations in terms of mechanically stable system configuration and reliable cooling system configuration.
- the battery pack according to the present invention is reliable regardless of the stacking structure of the battery module. Since the cooling system can be configured, the flexibility of the battery pack design can be easily obtained.
- the battery module constituting the battery pack according to the present invention is manufactured by stacking a plurality of unit cells with high density, and removes heat generated during charging and discharging and / or appropriately heats the supercooled battery module.
- Adjacent unit cells are stacked at regular intervals so as to be stacked.
- the battery cells themselves are sequentially stacked while being spaced at a predetermined interval without a separate member, or in the case of battery cells having low mechanical rigidity, one or two or more combinations are embedded in a predetermined mounting member and the mounting members are mounted.
- By stacking a plurality of battery modules can be configured. The latter case is referred to as 'unit module' in the present invention.
- a fluid flow path is provided between the battery cells and / or the unit module so that heat accumulated between the stacked battery cells can be effectively removed or a supercooled state can be eliminated. It is made of a structure formed between them.
- the fluid flow path, the first flow path for the fluid flows from the outside to the flow conversion unit, the second flow path for the fluid discharged from the flow conversion unit to the outside, the first flow path fluid is introduced into the battery module It may have a structure including a three flow path, and a fourth flow path for discharging the fluid from the battery module to the flow conversion unit.
- the third flow passage and the fourth flow passage are configured to face each other with respect to the battery module, so that the fluid flowing into the third flow passage passes through the battery module and is cooled or discharged through the fourth flow passage.
- the fluid introduced into the fourth flow path may be discharged through the third flow path after cooling or heating while passing through the battery module.
- the flow converting part is connected to a first flow path and a third flow path and a connection state (a) for connecting the second flow path and the fourth flow path, or the connection of the first flow path and the fourth flow path and the second flow path. And a connection state (b) for connecting the third flow path to determine a flow direction of the fluid.
- the flow converter maintains the connection state (a) so that fluid flows into the front part of the battery module and flows to the rear part of the battery module.
- the temperature is out of a predetermined range than the temperature of the battery located in the flow conversion unit by selecting the connection state (b) it is possible to change the flow direction of the fluid to flow into the rear portion of the battery module flows to the front portion of the battery module.
- the flow converting unit an external inlet connected to the first flow path, an external outlet connected to the second flow path, an internal inlet connected to the third flow path, and an internal discharge port connected to the fourth flow path.
- Fixed portion comprising a; And a second communication port which is rotatably mounted in the fixing part and communicates with the first inlet port, the external outlet port, and the internal outlet port, which is in communication with the external inlet port and the internal inlet port.
- a third communication port capable of communicating with the fourth communication port, and a fourth communication port communicating with the external outlet and the internal inlet, wherein only the first communication port and the second communication port communicate with the inlet and the outlet in the connected state (a).
- a rotating part having a structure in which only the third communication port and the fourth communication port communicate with the inlet port and the outlet port in the connected state (b).
- the rotating part is preferably a cylindrical structure, which may be mounted in a form inserted vertically from the top of the fixing part.
- the first communication hole and the second communication hole may be formed of a through hole penetrating the rotating part horizontally.
- the third communication port and the fourth communication port may be formed in the shape of a groove on the outer surface of the rotating part at the interface of the rotating part and the fixing part.
- the outer inlet and the outer outlet are formed on one side of the fixing part, the inner inlet and the inner outlet are formed on the opposite side of the fixing part, and the connection state (a) is connected when the rotating part rotates 90 degrees. It may be a structure that is converted to state (b).
- the operation controller may control the flow converter when a temperature difference between a unit cell adjacent to the third flow path and a temperature of the unit cell adjacent to the fourth flow path is equal to or greater than a predetermined value.
- the operation controller controls the flow conversion unit to control the flow path of the third flow path and the fourth flow path.
- the cooling or heating system of the battery pack may be configured to change the fluid direction.
- the flow driving force of the fluid may be provided in a variety of ways, for example by a pump, which pump may be selectively positioned on any flow path.
- the structure of the above embodiment is a method of changing the inflow and outflow direction of the fluid to the battery module only by operation in the flow change unit in a state in which the inflow and outflow direction of the fluid to the battery pack is unchanged, so that the entire battery pack There is also an effect that can be applied flexibly to a conventional battery pack because no structural change is caused.
- the flow converter may have a structure including a variable pump for changing the flow direction of the fluid.
- a variable pump that communicates with the first flow path and the third flow path, communicates with the second flow path and the fourth flow path, and provides a flow driving force for the fluid, has a fluid flow from the first flow path to the third flow path.
- variable pump may be configured to It may be provided between three flow paths, or may be installed between a second flow path and a fourth flow path. In some cases, it may be provided between the first flow path and the third flow path and between the second flow path and the fourth flow path, respectively.
- the conditions for determining the fluid flow direction are, for example, as described above, the temperature difference between the unit cell adjacent to the third flow path and the unit cell adjacent to the fourth flow path. Can be set when is greater than or equal to a predetermined size.
- the fluid is not particularly limited as long as it is a material capable of transferring heat for cooling or heating, and typically, air, water, and the like may be mentioned.
- the unit cells may have a structure that is built in the module case.
- the unit cells may be stacked on the side, and may have a structure in which the fluid inlet and the fluid outlet are respectively located on the upper and lower portions of the module case so that the fluid may flow in a direction perpendicular to the stacking direction of the unit cell.
- the temperature of the unit cell located in the rear of the battery module is unit cell located in the front of the battery module There is a problem that is higher than the temperature of.
- the battery pack according to the present invention includes a flow converting unit which can change the flow path of the fluid flowing into and out of the battery module as necessary, so that the problems occurring in the battery pack of the conventional structure as described above can be easily solved. have.
- a flow space ('fluid inlet') from the fluid inlet to the unit cell stack and a fluid space ('fluid outlet') from the unit cell stack to the fluid outlet are respectively provided in the module case. It may be made of a structure that is formed.
- the fluid inlet and the fluid outlet are flow spaces through which fluids can be introduced and discharged to effectively cool or heat the heat generated by charging and discharging the battery cells, and are respectively formed at upper and lower portions of the module case in opposite directions. have. In some cases, the fluid inlet and the fluid outlet may be formed at the lower and upper portions of the module case, respectively.
- the battery cell is, as a secondary battery, a nickel hydride secondary battery, a lithium secondary battery, and the like, and the like. Among them, a lithium secondary battery having a high energy density and a high discharge voltage is particularly preferable.
- a charge / discharge unit cell constituting the battery module a rectangular battery and a pouch-type battery are preferable in terms of shape.
- battery module refers to a structure of a battery system capable of mechanically coupling two or more charge / discharge battery cells or unit modules and simultaneously electrically connecting them to provide a high output large capacity electricity. As it is meant to be inclusive, it includes all cases that constitute one device per se or a part of a large device.
- a large battery module may be configured by connecting a plurality of small battery modules, or a plurality of unit modules may be connected by connecting a small number of battery cells.
- the structure of the unit module can be made in a variety of configurations, a preferred example will be described below.
- the unit module is a structure in which the plate-shaped battery cells in which the electrode terminals are formed at the top and the bottom, or both at one side thereof are connected to each other in series, and two or more batteries having the stacked structure by bending the connection parts of the electrode terminals are formed.
- Cells, and except for the electrode terminal portion may be configured to include a high-strength cell cover coupled to surround the outer surface of the battery cells.
- the plate-shaped battery cell is a battery cell having a thin thickness and a relatively wide width and length so as to minimize the overall size when it is charged for the configuration of the battery module.
- a secondary battery having a structure in which an electrode assembly is embedded in a battery case of a laminate sheet including a resin layer and a metal layer, and electrode terminals protrude from upper and lower ends thereof, and specifically, a pouch type of an aluminum laminate sheet. It may be a structure in which the electrode assembly is built in the case.
- a secondary battery having such a structure may be referred to as a pouch type battery cell.
- These battery cells can be configured as a unit module in a structure wrapped in a high-strength cell cover made of synthetic resin or metal in two or more units, the high-strength cell cover is charged and discharged while protecting the battery cell with low mechanical rigidity It prevents the sealing part of the battery cell from being separated by suppressing the change of repetitive expansion and contraction during the time. Therefore, it becomes possible to manufacture a medium-large battery module with more excellent safety ultimately.
- the battery cells in the unit module or between the module modules are connected in series and / or in parallel, and in a preferred embodiment, the electrode terminals are arranged with the battery cells arranged longitudinally in series so that their electrode terminals are continuously adjacent to each other.
- the plurality of unit modules may be manufactured by folding the battery cells in two or more units so as to overlap each other and wrapping the cells in a predetermined unit by the cell cover.
- Coupling of the electrode terminals may be implemented in various ways, such as welding, soldering, mechanical fastening, preferably by welding.
- the plurality of battery cells or unit modules in which the electrode terminals are interconnected and filled with high density may be vertically mounted in a vertically separated case coupled to a prefabricated fastening structure to constitute a battery module.
- the battery pack according to the present invention includes a plurality of battery cells to achieve a high output large capacity, the high heat generated during charging and discharging seriously emerged in terms of safety, electric vehicles requiring heating to increase the operating efficiency in the super-cooled state, It can be used especially suitably for the power supply of a hybrid electric vehicle or a plug-in hybrid electric vehicle.
- FIG. 1 is a schematic view of a battery pack according to an embodiment of the present invention.
- FIG. 2 is a schematic view of a battery pack according to another embodiment of the present invention.
- FIG. 3 and 4 are perspective views according to one embodiment of the flow converter of FIG. 1;
- FIG. 5 and 6 are perspective views according to one embodiment of the flow converter of FIG. 2;
- FIG. 7 is a schematic view of a flow conversion unit according to another embodiment in the battery pack of the present invention.
- FIG. 8 is a perspective view of a battery module according to another embodiment of the present invention.
- FIG. 1 is a schematic diagram of a battery pack according to an embodiment of the present invention.
- the battery pack 200 is a battery pack for controlling temperature, and includes a battery module 100, a fluid flow path 270, a flow converter 250, and an operation controller 260.
- the battery module 100 includes a plurality of unit modules capable of charging and discharging, and the fluid flow path 270 is formed so that fluid for cooling or heating the battery module 100 passes through the battery module 100.
- the flow converting unit 250 is located on the fluid flow path 270 to change the flow direction of the fluid according to the temperature state of the battery module 100, the operation control unit 260 is a temperature for the temperature of the battery module 100 It is connected to the flow transformer 250 to control the operation of the flow transformer 250 based on the information.
- the fluid flow path 270 may include a first flow path 210 through which fluid is introduced into the flow converter 250 from the outside, a second flow path 220 through which fluid is discharged from the flow converter 250 to the outside, and flow. And a third flow path 230 through which fluid flows from the converter 250 into the battery module 100, and a fourth flow path 240 through which fluid is discharged from the battery module 100 to the flow converter 250.
- the third flow path 230 and the fourth flow path 240 face each other with respect to the battery module 100.
- the flow converter 250 selects a connection state (a) for connecting the first flow path 210 and the third flow path 230 and the connection of the second flow path 220 and the fourth flow path 240. After the fluid flowing through the first flow path 210 and the third flow path 230 cools or heats the battery module 100, the fluid flows to the outside through the fourth flow path 240 and the second flow path 220. To be discharged.
- FIG. 2 is a schematic view of a battery pack according to another embodiment of the present invention.
- the flow converter 250a may be connected to a first flow path 210 and a fourth flow path 240, and a connection state b for connecting the second flow path 220 and the third flow path 230. ),
- the fluid flowing through the first flow path 210 and the fourth flow path 240 cools or heats the battery module 100 and then opens the third flow path 230 and the second flow path 220. It is discharged to the outside via diesel.
- the operation control unit 260 of FIG. 1 when the temperature of the battery module 100 adjacent to the fourth flow path 240 is greater than about 5 degrees Celsius higher than the temperature of the battery module 100 adjacent to the third flow path 230.
- the flow converter 250 By controlling the flow converter 250 as in the flow converter 250a of FIG. 2, the flow path of the fluid is changed.
- FIG. 3 and 4 are perspective views schematically showing the flow converter of FIG. 1. Specifically, the flow converting part 250 of FIG. 3 shows a state before the rotating part 252 is inserted into the fixing part 254, and the flow converting part 250 of FIG. The state after being inserted into 254) is shown.
- the flow converter 250 is composed of a fixed part 254 and a rotating part 252.
- the fixing part 254 may include an external inlet port 2252 connected to the first flow path 210, an external outlet port 2544 connected to the second flow path 220, and an internal inlet port connected to the third flow path 230. 2546, and an internal outlet 2548 connected to the fourth flow path 240.
- the rotating part 252 is rotatably mounted inside the fixing part 254, and communicates with the outer inlet 2542 and the inner inlet 2546 of the fixing part 254, and And a second communication port 2524 communicating the external outlet 2544 and the internal outlet 2548 of the fixed portion 254.
- the rotating part 252 has a cylindrical structure, and is mounted in a form inserted vertically from the top of the fixing part 254, and the first communication port 2522 and the second communication port 2524 in the connected state (a). Only the inlets 2542 and 2546 and the outlets 2544 and 2548 communicate with each other.
- the first communication port 2522 and the second communication port 2524 are formed in the form of a through hole penetrating the rotating part 252 horizontally, and the third communication port 2526 and the fourth communication port 2528 are the rotating part. It is formed in the form of a groove on the outer surface of the rotating part 252 at the interface of the 252 and the fixing part 254.
- FIG. 5 and 6 schematically show perspective views of the flow converting part of FIG. 2.
- the flow converting part 250a of FIG. 5 shows a state before the rotating part 252 is inserted into the fixing part 254, and the rotating part 252 of the flow converting part 250a of FIG. 6 has a fixing part ( The state after being inserted into 254) is shown.
- the rotating portion 252 may include a third communication port 2526 communicating with an external inlet 2542 and an internal outlet 2548 of the fixing unit 254, and a fixing unit 254. And a fourth communication port 2528 in communication with the external outlet 2544 and the internal inlet 2546.
- the flow converting part 250a of FIGS. 5 and 6 rotates the flow converting part 250 of FIG. 3 by 90 degrees in the direction of the right arrow, so that the rotating part 252 is connected to the third communication hole (b).
- 2526 and only the fourth communication port 2528 are configured to communicate with the inlets 2542 and 2546 and the outlets 2544 and 2548.
- connection state (a) is converted to the connection state (b) when the rotary unit 252 is rotated 90 degrees.
- FIG 7 schematically shows another example of the flow conversion unit in the battery pack of the present invention.
- the flow converter 250 ′ includes a variable pump 255 for changing the flow direction of the fluid. Specifically, the first flow path 210 and the third flow path 230 is in communication, the second flow path 220 and the fourth flow path 240 is in communication, the variable pump 255 for providing a flow driving force of the fluid ) Is included.
- the operation control unit 260 is in an operating state (solid line display) to provide fluid flow from the first flow path 210 to the third flow path 230 and fluid flow from the fourth flow path 240 to the second flow path 220. ), Or an operating state (dotted dashed line display) that provides a fluid flow from the second flow path 220 to the fourth flow path 240 and a fluid flow from the third flow path 230 to the first flow path 210, Determine the direction of flow of the fluid.
- the conditions for determining the flow direction of the fluid may be the same as described with reference to FIGS. 1 to 6.
- FIG. 8 is a perspective view schematically showing a battery module according to another embodiment of the present invention, the A portion of the unit modules viewed from the B direction to explain the state in which the unit modules are stacked inside the battery module A lamination state is shown typically.
- the battery module 100a includes a unit module stack 32 in which a plurality of unit modules 30 are stacked sideways and electrically connected to each other, and such a unit module stack 32 is provided. It is composed of a module case 70, the fluid inlet 10, the fluid is introduced into the battery module 100a from the outside and the fluid outlet port (not shown) for discharging the fluid from the unit module stack 32 .
- the fluid flowing from the fluid inlet 10 passes through the flow path 50 formed between the unit modules 30 and cools or heats the heat generated in the unit modules 30, and finally passes through the fluid outlet so as to finally flow the conversion unit ( It is discharged to the outside through 250).
- the battery pack according to the present invention includes a flow conversion unit located on the fluid flow path to change the flow direction of the fluid in accordance with the temperature state of the battery module, greatly changing the structure of the battery pack Without maintaining the temperature of the battery pack uniformly only by the flow conversion unit can significantly improve the performance and life of the battery pack.
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Abstract
Description
Claims (17)
- 온도를 제어할 수 있는 전지팩으로서,충방전이 가능한 전지셀 또는 단위모듈('단위 셀') 다수 개를 포함하고 있는 하나 또는 둘 이상의 전지모듈;상기 전지모듈의 냉각 또는 가열을 위한 유체가 전지모듈을 통과하도록 형성되어 있는 유체 유로;상기 유체 유로 상에 위치하고, 전지모듈의 온도 상태에 따라 유체의 유동 방향을 변환시키는 유동 변환부; 및전지모듈의 온도에 대한 정보를 바탕으로 상기 유동 변환부의 작동을 제어하는 작동 제어부;를 포함하고 있는 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 유체 유로는, 외부로부터 유동 변환부로 유체가 유입되는 제 1 유로, 유동 변환부로부터 외부로 유체가 배출되는 제 2 유로, 유동 변환부로부터 전지모듈로 유체가 유입되는 제 3 유로, 및 전지모듈로부터 유동 변환부로 유체가 배출되는 제 4 유로를 포함하고 있는 것을 특징으로 하는 전지팩.
- 제 2 항에 있어서, 상기 제 3 유로와 제 4 유로는 전지모듈을 중심으로 서로 대향하고 있는 것을 특징으로 하는 전지팩.
- 제 2 항에 있어서, 상기 유동 변환부는, 제 1 유로와 제 3 유로의 연결 및 제 2 유로와 제 4 유로의 연결을 위한 연결 상태(a), 또는 제 1 유로와 제 4 유로의 연결 및 제 2 유로와 제 3 유로의 연결을 위한 연결 상태(b)를 선택하여 유체의 유동 방향을 결정하는 것을 특징으로 하는 전지팩.
- 제 4 항에 있어서, 상기 유동 변환부는,제 1 유로에 연결되는 외부 유입구, 제 2 유로에 연결되어 있는 외부 배출구, 제 3 유로에 연결되어 있는 내부 유입구, 및 제 4 유로에 연결되어 있는 내부 배출구를 포함하고 있는 고정부; 및상기 고정부의 내부에 회전 가능하게 장착에 되어 있고, 외부 유입구 및 내부 유입구와 연통할 수 있는 제 1 연통구, 외부 배출구 및 내부 배출구를 연통할 수 있는 제 2 연통구, 외부 유입구 및 내부 배출구와 연통할 수 있는 제 3 연통구, 및 외부 배출구 및 내부 유입구와 연통할 수 있는 제 4 연통구를 포함하며, 연결 상태(a)에서 제 1 연통구와 제 2 연통구 만이 유입구 및 배출구에 연통되고, 연결 상태(b)에서 제 3 연통구와 제 4 연통구 만이 유입구 및 배출구에 연통되는 구조로 이루어진 회전부;를 포함하는 것을 특징으로 하는 전지팩.
- 제 5 항에 있어서, 상기 회전부는 원통 구조로서, 고정부의 상부로부터 수직으로 삽입된 형태로 장착되어 있는 것을 특징으로 하는 전지팩.
- 제 6 항에 있어서, 제 1 연통구와 제 2 연통구는 상기 회전부를 수평으로 관통하는 관통구의 형태로 형성되어 있고, 제 3 연통구와 제 4 연통구는 회전부와 고정부의 계면에서 회전부의 외면에 그루브의 형태로 형성되어 있는 것을 특징으로 하는 전지팩.
- 제 7 항에 있어서, 상기 외부 유입구와 외부 배출구는 고정부의 일측에 형성되어 있고, 상기 내부 유입구와 내부 배출구는 고정부의 대향측에 형성되어 있으며, 회전부의 90도 회전시 연결 상태(a)가 연결 상태(b)로 변환되는 것을 특징으로 하는 전지팩.
- 제 2 항에 있어서, 상기 작동 제어부는 제 3 유로에 인접한 단위셀의 온도와 제 4 유로에 인접한 단위셀의 온도 차이가 소정값 이상일 때 유동 변환부를 제어하는 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 제 1 유로와 제 3 유로가 연통되어 있고 제 2 유로와 제 4 유로가 연통되어 있으며, 상기 유동 변환부는 유체의 유동 구동력을 제공하는 가변 펌프를 포함하고 있고, 상기 가변 펌프는, 제 1 유로부터 제 3 유로로의 유체 유동과 제 4 유로부터 제 2 유로로의 유체 유동을 제공하는 가동 상태(c), 또는 제 2 유로부터 제 4 유로로의 유체 유동과 제 3 유로부터 제 1 유로로의 유체 유동을 제공하는 가동 상태(d)를 선택하여, 유체의 유동 방향을 결정하는 구조로 이루어진 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 단위 셀들은 모듈 케이스에 내장되어 있는 구조로 이루어진 것을 특징으로 하는 전지팩.
- 제 11 항에 있어서, 상기 단위 셀들은 측면으로 적층되어 있고, 상기 유체가 단위 셀 적층방향에 수직한 방향으로 유동할 수 있도록 유체 유입구와 유체 배출구가 모듈 케이스의 상부 및 하부에 각각 위치하고 있는 것을 특징으로 하는 전지팩.
- 제 12 항에 있어서, 상기 유체 유입구로부터 단위 셀 적층체에 이르는 유동 공간('유체 유입부')과 단위 셀 적층체로부터 유체 배출구에 이르는 유동 공간('유체 배출부')이 모듈 케이스에 각각 형성되어 있는 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 전지셀은 리튬 이차전지인 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 단위모듈은 전극단자들이 직렬로 상호 연결되어 있는 둘 또는 그 이상의 전지셀들, 및 상기 전극단자 부위를 제외하고 상기 전지셀들의 외면을 감싸도록 상호 결합되는 한 쌍의 셀 커버;를 포함하는 구조로 이루어진 것을 특징으로 하는 전지팩.
- 제 15 항에 있어서, 상기 단위모듈은 금속 소재의 셀 커버 내부에 두 개의 전지셀들이 장착되어 있는 구조로 이루어진 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 전지팩은 전기자동차, 하이브리드 전기자동차, 또는 플러그-인 하이브리드 전기자동차의 전원으로 사용되는 것을 특징으로 하는 전지팩.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP11816557.0A EP2605328B1 (en) | 2010-08-09 | 2011-08-02 | Battery pack of novel structure |
| CN201180037791.XA CN103053067B (zh) | 2010-08-09 | 2011-08-02 | 具有新型结构的电池组 |
| JP2013524031A JP5526289B2 (ja) | 2010-08-09 | 2011-08-02 | 新規な構造の電池パック |
| US13/747,072 US8852782B2 (en) | 2010-08-09 | 2013-01-22 | Battery pack having novel structure |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2010-0076187 | 2010-08-09 | ||
| KR20100076187 | 2010-08-09 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/747,072 Continuation US8852782B2 (en) | 2010-08-09 | 2013-01-22 | Battery pack having novel structure |
Publications (2)
| Publication Number | Publication Date |
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| WO2012020941A2 true WO2012020941A2 (ko) | 2012-02-16 |
| WO2012020941A3 WO2012020941A3 (ko) | 2012-05-31 |
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| PCT/KR2011/005677 Ceased WO2012020941A2 (ko) | 2010-08-09 | 2011-08-02 | 신규한 구조의 전지팩 |
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| US (1) | US8852782B2 (ko) |
| EP (1) | EP2605328B1 (ko) |
| JP (1) | JP5526289B2 (ko) |
| KR (1) | KR101240961B1 (ko) |
| CN (1) | CN103053067B (ko) |
| WO (1) | WO2012020941A2 (ko) |
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| JP2007087779A (ja) * | 2005-09-22 | 2007-04-05 | Corona Corp | 燃料電池システム |
| US20070077474A1 (en) * | 2005-10-04 | 2007-04-05 | Goebel Steven G | Fuel cell system water mass balancing scheme |
| JP2007179944A (ja) * | 2005-12-28 | 2007-07-12 | Toyota Motor Corp | 蓄電装置の冷却構造 |
| KR100870457B1 (ko) | 2006-05-22 | 2008-11-25 | 주식회사 엘지화학 | 전지모듈 |
| KR100896131B1 (ko) | 2006-05-22 | 2009-05-08 | 주식회사 엘지화학 | 중대형 전지모듈 |
| JP5154454B2 (ja) * | 2006-03-06 | 2013-02-27 | エルジー・ケム・リミテッド | 電池モジュール |
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| JP2009245802A (ja) * | 2008-03-31 | 2009-10-22 | Toyota Motor Corp | 燃料電池システム |
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2011
- 2011-08-02 WO PCT/KR2011/005677 patent/WO2012020941A2/ko not_active Ceased
- 2011-08-02 KR KR1020110076903A patent/KR101240961B1/ko active Active
- 2011-08-02 CN CN201180037791.XA patent/CN103053067B/zh active Active
- 2011-08-02 EP EP11816557.0A patent/EP2605328B1/en active Active
- 2011-08-02 JP JP2013524031A patent/JP5526289B2/ja active Active
-
2013
- 2013-01-22 US US13/747,072 patent/US8852782B2/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060045443A (ko) | 2004-04-02 | 2006-05-17 | 도시바 마쯔시따 디스플레이 테크놀로지 컴퍼니, 리미티드 | 액정 표시 장치 |
| KR20060045444A (ko) | 2004-04-02 | 2006-05-17 | 소니 가부시끼 가이샤 | 고체 촬상 디바이스 및 그 제조 방법 |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR101240961B1 (ko) | 2013-03-11 |
| EP2605328B1 (en) | 2016-02-03 |
| JP2013539166A (ja) | 2013-10-17 |
| JP5526289B2 (ja) | 2014-06-18 |
| WO2012020941A3 (ko) | 2012-05-31 |
| US20130130076A1 (en) | 2013-05-23 |
| CN103053067A (zh) | 2013-04-17 |
| KR20120014541A (ko) | 2012-02-17 |
| CN103053067B (zh) | 2015-07-22 |
| EP2605328A4 (en) | 2014-03-19 |
| EP2605328A2 (en) | 2013-06-19 |
| US8852782B2 (en) | 2014-10-07 |
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