CN216720203U - Battery box and battery package - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery box body and a battery pack. The battery box includes case body and partition structure, and the partition structure sets up in the case body to form battery accommodation space and exhaust space, the partition structure includes: mounting a plate; the pressure relief structure and the mounting plate are independently formed structures, and the pressure relief structure is arranged on the mounting plate; wherein, the gas in the battery accommodation space can be collected to the exhaust space in and discharge through pressure release structure to this pressure release that realizes the battery box avoids causing the safety problem. Because pressure relief structure and mounting panel are independent shaping structure, consequently can control pressure relief structure's installation to reduce the impaired risk of pressure relief structure, with this pressure release effect of guaranteeing.

Description

Battery box and battery pack

technical field

The utility model relates to the technical field of batteries, in particular to a battery box and a battery pack.

Background technique

In the related art, the inner space of the battery pack may include an accommodation space for placing batteries and an exhaust space for exhausting air. A pressure relief structure is arranged between the accommodating space and the exhaust space, so as to avoid the thermal runaway problem of the battery pack. However, due to the structural limitation of the pressure relief structure, it may be damaged during the installation process, thereby affecting the pressure relief effect.

Utility model content

The utility model provides a battery box body and a battery pack to improve the performance of the battery box body.

According to the first aspect of the present utility model, a battery box is provided, including a box body and a partition structure, the partition structure is arranged in the box body to form a battery accommodating space and an exhaust space, and the partition structure includes:

mounting plate;

The pressure relief structure, the pressure relief structure and the mounting plate are independent molding structures, and the pressure relief structure is arranged on the mounting plate;

The gas in the battery accommodating space can be collected into the exhaust space through the pressure relief structure and discharged.

The battery box of the embodiment of the present invention includes a box body and a partition structure. The partition structure forms a battery accommodating space and an exhaust space in the box body. The partition structure includes a mounting plate and a pressure relief structure. The gas in the battery accommodating space can pass through The pressure relief structure is collected into the exhaust space and discharged, so as to realize the pressure relief of the battery box and avoid safety problems. Since the pressure relief structure and the mounting plate are independently formed structures, the installation of the pressure relief structure can be controlled, thereby reducing the risk of damage to the pressure relief structure, thereby ensuring the pressure relief effect.

According to a second aspect of the present invention, a battery pack is provided, including the above-mentioned battery case.

The battery pack of the embodiment of the present invention includes a battery box body, the battery box body includes a box body and a partition structure, the partition structure forms a battery accommodating space and an exhaust space in the box body, the partition structure includes a mounting plate and a pressure relief structure, the battery The gas in the accommodating space can be collected into the exhaust space and discharged through the pressure relief structure, so as to realize the pressure relief of the battery box and avoid causing safety problems. Since the pressure relief structure and the mounting plate are independently formed structures, the installation of the pressure relief structure can be controlled, thereby reducing the risk of damage to the pressure relief structure, thereby ensuring the pressure relief effect.

Description of drawings

For a better understanding of the present disclosure, reference may be made to the embodiments shown in the following figures. Components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. Additionally, the relevant elements or components may be arranged differently as known in the art. Furthermore, in the drawings, the same reference numerals refer to the same or similar parts throughout the various figures. in:

FIG. 1 is a schematic structural diagram of a battery pack according to an exemplary embodiment;

FIG. 2 is a schematic diagram of a partial structure of a battery pack according to an exemplary embodiment;

FIG. 3 is a schematic structural diagram of a battery case according to an exemplary embodiment;

4 is a schematic structural diagram of a battery accommodating space of a battery case according to an exemplary embodiment;

5 is a schematic structural diagram of an exhaust space of a battery case according to an exemplary embodiment;

FIG. 6 is a schematic structural diagram of a battery according to an exemplary embodiment;

FIG. 7 is a partial structural schematic diagram of a battery pack according to an exemplary embodiment.

The reference numerals are explained as follows:

1. Battery; 2. Battery shell; 3. Explosion-proof valve; 4. Explosion-proof hole; 5. Battery module; 6. Housing part; 7. Cover plate; 10. Box body; 11. Battery storage space; 12. Exhaust space; 13, bottom plate; 14, frame; 15, top cover; 20, partition structure; 21, mounting plate; 211, air collecting groove; 2111, bottom wall; 2112, side wall; 213, the second plate body; 214, the circulating flow channel; 215, the weakening part; 216, the first solder; 22, the pressure relief structure; 23, the heat conduction part.

Detailed ways

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, so it should be understood that various modifications may be made to the example embodiments without departing from the scope of the present disclosure. modifications and changes.

In the description of the present disclosure, unless otherwise explicitly specified and limited, the terms "first" and "second" are only used for the purpose of description, and cannot be construed as indicating or implying relative importance; the term "plurality" is a means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the/said" or "an" object is also intended to mean one of the possible plurality of such objects.

Unless otherwise specified or stated, the terms "connected", "fixed", etc. should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection, or a signal connection. Connection; "connection" can be directly connected or indirectly connected through an intermediary. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

Further, in the description of the present disclosure, it should be understood that the directional terms "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are from the angles shown in the drawings. described, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being connected "on", "under", or "inside" or "outside" another element(s), it can not only be directly connected "On", "under" or "inside", "outside" another element(s), or indirectly connected "on", "under" or "outside" another element(s) through intervening elements inside and outside".

An embodiment of the present invention provides a battery box. Please refer to FIGS. 1 to 5 . The battery box includes a box body 10 and a partition structure 20 . The partition structure 20 is disposed in the box body 10 to form a battery accommodating space. 11 and the exhaust space 12, the separation structure 20 includes: the mounting plate 21; the pressure relief structure 22, the pressure relief structure 22 and the mounting plate 21 are independent molding structures, and the pressure relief structure 22 is arranged on the mounting plate 21; wherein, the battery accommodating space 11 The gas inside can be collected into the exhaust space 12 through the pressure relief structure 22 and discharged.

The battery box of one embodiment of the present invention includes a box body 10 and a partition structure 20 , the partition structure 20 forms a battery accommodating space 11 and an exhaust space 12 in the box body 10 , and the partition structure 20 includes a mounting plate 21 and a pressure relief structure 22. The gas in the battery accommodating space 11 can be collected into the exhaust space 12 through the pressure relief structure 22 and discharged, so as to realize the pressure relief of the battery box and avoid causing safety problems. Since the pressure relief structure 22 and the mounting plate 21 are independently formed structures, the installation of the pressure relief structure 22 can be controlled, thereby reducing the risk of damage to the pressure relief structure 22, thereby ensuring the pressure relief effect.

It should be noted that the pressure relief structure 22 and the mounting plate 21 are independent molding structures, that is, the mounting plate 21 and the pressure relief structure 22 need to be independently formed before the pressure relief structure 22 is installed on the mounting plate 21. When the plate 21 is installed and transported, the pressure relief structure 22 may not be installed first, so as to avoid problems such as damage to the pressure relief structure 22 caused by various unnecessary operations, thereby ensuring the pressure relief performance of the pressure relief structure 22 . For the battery case in this embodiment, the pressure relief structure 22 can be installed when the batteries are grouped. In addition, since the pressure relief structure 22 and the mounting plate 21 are formed independently, the manufacturing difficulty of the mounting plate 21 can be reduced, and the forming efficiency of the components can be improved to a certain extent.

The pressure relief structure 22 may be a valve body, and when the pressure in the battery accommodating space 11 reaches a certain value, the valve body can be opened, so that the battery accommodating space 11 and the exhaust space 12 are communicated. The pressure relief structure 22 can be similar to an explosion-proof structure, such as an explosion-proof valve. When the pressure in the battery accommodating space 11 reaches a certain value, the explosion-proof structure can be broken, so that the battery accommodating space 11 and the exhaust space 12 are communicated. The pressure relief structure 22 can also be a structure with relatively low strength, such as a thin aluminum plate. When the pressure in the battery accommodating space 11 reaches a certain value, the thin aluminum plate can be broken through, so that the battery accommodating space 11 and the exhaust space 12 are connected. . The pressure relief structure 22 can also be a score, as long as the strength is relatively low. It should be noted that when the pressure in the battery accommodating space 11 reaches a certain value, it does not specifically mean that the overall air pressure in the battery accommodating space 11 reaches a certain value, but may also mean that the local air pressure in the battery accommodating space 11 reaches a certain value. For example, the pressure relief port of the battery is directly opposite to the pressure relief structure 22. At this time, the local air pressure discharged from the pressure relief port of the battery will be relatively high, so it can also directly break through a certain value, collect it into the exhaust space 12 and discharge it. The air pressure in other parts of the battery accommodating space 11 may also have very small changes during the time. In some embodiments, it is not excluded that the air pressure in other parts of the battery accommodating space 11 does not change. In this embodiment, the gas pressure in the battery accommodating space 11 reaches a certain value, and it is emphasized that the pressure relief structure 22 can be broken.

In one embodiment, the gas in the battery accommodating space 11 can damage the pressure relief structure 22 , so that the gas is collected into the exhaust space 12 and discharged. The damage of the pressure relief structure 22 can be considered as the damage of the middle part of the pressure relief structure 22, so as to realize the discharge of gas. For example, the pressure relief structure 22 can be an explosion-proof membrane, and the explosion-proof membrane is provided with a thinned part, and the gas in the battery accommodating space 11 The thinned portion can be broken through, so that the gas is collected into the exhaust space 12 and discharged.

In one embodiment, the gas in the battery accommodating space 11 can cause at least part of the pressure relief structure 22 to detach from the mounting plate 21 from its connection with the mounting plate 21 , so that the gas is collected into the exhaust space 12 and discharged, that is, The pressure relief structure 22 is not damaged, but the pressure relief structure 22 fails due to the connection between the pressure relief structure 22 and the mounting plate 21 , so that the gas in the battery accommodating space 11 can be collected into the exhaust space 12 and discharged.

It should be noted that the pressure relief structure 22 may be separated from the mounting plate 21 as a whole, or the pressure relief structure 22 may be partially separated from the mounting plate 21. At this time, a gap may be formed between the pressure relief structure 22 and the mounting plate 21, so as to Realize the emission of gas. This embodiment emphasizes the failure of the connection between the pressure relief structure 22 and the mounting plate 21 , rather than the pressure relief by the destruction of the pressure relief structure 22 itself.

In one embodiment, the pressure relief structure 22 can be detached from the mounting plate 21 at a preset temperature; wherein the preset temperature is a, 100°C≤a≤300°C, so that the gas generated by thermal runaway is discharged from the failure point to the exhaust Air space 12.

In some embodiments, the preset temperature a may be 100°C, 110°C, 120°C, 150°C, 200°C, 210°C, 220°C, 250°C, 270°C, 280°C, 290°C, 300°C, and the like.

It should be noted that the connection between the pressure relief structure 22 and the mounting plate 21 can fail at the preset temperature a, so that the gas can be discharged in the early stage of thermal runaway, and the safety performance of the battery pack can be improved. Alternatively, the pressure relief structure 22 may include a first part and a second part, the first part and the second part are connected, and the connection between the first part and the second part may fail at a predetermined temperature a, similar to the structure of the pressure relief structure 22 itself be damaged.

In one embodiment, the pressure relief structure 22 and the mounting plate 21 are connected by a first solder 216, that is, the pressure relief structure 22 and the mounting plate 21 are soldered, and the melting point of the first solder 216 may be 100°C to 300°C, Therefore, the first brazing filler metal 216 can be damaged and fail at 100° C. to 300° C., thereby ensuring reliable heat dissipation and pressure relief.

The first solder 216 may be a tin-containing solder.

In one embodiment, the pressure relief structure 22 is bonded to the mounting plate 21, that is, the pressure relief structure 22 and the mounting plate 21 can be connected by an adhesive layer, and the adhesive layer can be damaged and fail at 100°C to 300°C, so as to Ensure reliable heat dissipation and pressure relief.

The adhesive layer can be adhesive, the adhesive can be polyurethane, epoxy, acrylic, and the adhesive can be melted at 100°C to 300°C.

In one embodiment, the pressure relief structure 22 may be an aluminum plate, a copper plate, a nickel plate, or the like. The pressure relief structure 22 can be broken under the impact of a certain pressure, so that the battery accommodating space 11 and the exhaust space 12 communicate with each other. Alternatively, the connection between the pressure relief structure 22 and the mounting plate 21 is disabled at a preset temperature, so that the battery accommodating space 11 and the exhaust space 12 are communicated.

In one embodiment, as shown in FIGS. 1 and 2 , the pressure relief structure 22 is located on the side of the mounting plate 21 close to the battery accommodating space 11 , so that the heat in the battery accommodating space 11 can quickly contact the pressure relief structure 22 and the battery accommodating space 11 . Install the connection of the plate 21, so as to realize the exhaust.

It should be noted that, in the early stage of thermal runaway, the gas can melt the connection between the pressure relief structure 22 and the mounting plate 21 to realize gas leakage, and the pressure of the subsequent contact with the pressure relief structure 22 can be relatively large, so it can also be The pressure relief structure 22 is broken, or the pressure relief structure 22 is directly flushed into the exhaust space 12 . Of course, in some embodiments, if the gas can melt the connection between the pressure relief structure 22 and the mounting plate 21 in the early stage of thermal runaway, so as to realize gas leakage, and the subsequent heat may decrease, the pressure relief structure will not be melted. 22 breaks, but the pressure relief structure 22 and the mounting plate 21 achieve a secondary connection.

In one embodiment, the pressure relief structure 22 is located on the other side of the installation plate 21 close to the exhaust space 12 , so that after the connection between the pressure relief structure 22 and the installation plate 21 fails, the pressure relief structure 22 may also under its own gravity The lower part is further disengaged from the mounting plate 21, thereby increasing the pressure relief capacity.

In one embodiment, as shown in FIG. 1 and FIG. 2 , the mounting plate 21 and the pressure relief structure 22 are formed with a gas collecting groove 211 ; wherein the gas in the battery accommodating space 11 can be collected to the exhaust space through the gas collecting groove 211 12 and drain. Due to the formation of the gas collection groove 211 , the gas can be quickly collected in the gas collection groove 211 , thereby improving the pressure relief capability of the pressure relief structure 22 .

It should be noted that the gas collecting tank 211 can collect the gas discharged from the battery, so as to ensure the pressure relief capability of the pressure relief structure 22 . For example, the pressure relief structure 22 can be broken under the impact of a certain pressure, and at this time, the existence of the gas collecting groove 211 can ensure the internal pressure of the gas collecting groove 211 . Alternatively, the connection between the pressure relief structure 22 and the mounting plate 21 is disabled at a preset temperature, and the air collecting groove 211 can sufficiently collect heat, thereby ensuring that the heat is discharged in time.

In some embodiments, as shown in FIG. 1 and FIG. 2 , the gas collecting groove 211 includes a bottom wall 2111 and a side wall 2112 , and the pressure relief structure 22 may form the side wall 2112 of the gas collecting groove 211 .

In some embodiments, the pressure relief structure 22 forms at least part of the bottom wall 2111 of the air collecting groove 211 . This design not only facilitates the installation of the pressure relief structure 22 , but also ensures that the pressure relief structure 22 can be reliably separated from the mounting plate 21 .

In some embodiments, the gas collecting groove 211 may be a through groove, that is, the gas collecting groove 211 includes three openings. In this case, the opposite sides of the bottom wall 2111 of the The air groove 211 is arranged on a flat plate. At this time, a depression may be formed on the plate, and two ends of the depression pass through opposite ends of the plate. Alternatively, the air collecting groove 211 may be a groove, that is, the air collecting groove 211 includes an opening, and the bottom wall 2111 of the air collecting groove 211 surrounds a circumferentially closed side wall 2112, for example, the air collecting groove 211 is arranged on a flat plate At this time, a groove may be provided inside the plate.

In some embodiments, the upper and lower sides of the mounting plate 21 form the battery accommodating space 11 and the exhaust space 12 . As shown in FIG. 1 , the battery accommodating space 11 and the exhaust space 12 are stacked on top of each other. In some embodiments, it is not excluded that the upper and lower sides of the mounting plate 21 form the exhaust space 12 and the battery accommodating space 11 .

In some embodiments, the battery accommodating space 11 and the exhaust space 12 are formed on the left and right sides of the mounting plate 21 . At this time, the exhaust space 12 may be arranged around the circumference of the battery accommodating space 11 , that is, the exhaust space 12 is provided around the battery accommodating space 11 . Alternatively, the exhaust space 12 may be only a part of the circumference of the battery accommodating space 11. For example, the battery accommodating space 11 may be a rectangular space, and in this case, the exhaust space 12 may be located on at least one side of the four circumferential outer sides of the rectangular space, Therefore, the gas in the battery accommodating space 11 can enter into the exhaust space 12 from the side thereof, so as to realize pressure relief through the exhaust space 12 .

In one embodiment, as shown in FIGS. 3 to 5 , the box body 10 further includes: a bottom plate 13 ; a frame 14 , and the frame 14 is arranged around the bottom plate 13 ; A battery accommodating space 11 and an exhaust space 12 are respectively formed on both sides.

It should be noted that the arrangement of the frame 14 around the bottom plate 13 does not have a specific meaning, and the key point is to explain that the frame 14 forms a circumferentially closed space. The frame 14 is connected with the bottom plate 13, and the frame 14 can be arranged on the bottom plate 13, or the frame 14 can be connected with the circumferential edge of the bottom plate 13, and it is not limited here that the top cover 15 is connected to the frame 14, and is connected to the partition structure 20. Oppositely arranged, so that the box body 10 can form a closed space.

The bottom plate 13 and the frame 14 form a large cavity, and the partition structure 20 can divide the large cavity into upper and lower parts, that is, the battery accommodating space 11 and the exhaust space 12 . The bottom plate 13 can be used to protect the bottom of the battery box, and the specific structure of the bottom plate 13 is not limited. The frame 14 is connected to the bottom plate 13, and the frame 14 may be formed by splicing a plurality of beams, or the frame 14 may also be an integral plate-like structure to enclose a circumferential closed space.

At least one of the bottom plate 13 and the frame 14 is provided with an exhaust through hole, so that the gas in the exhaust space 12 can be discharged in time. The inside of the exhaust through hole may not be provided with other structures, and in this case, the exhaust space 12 may be directly connected to the outside through the exhaust through hole.

In one embodiment, as shown in FIG. 4 , the mounting plate 21 may include a weakened portion 215 , and the battery accommodating space 11 may be collected to the exhaust space 12 through the weakened portion 215 and the pressure relief structure 22 . The weakened portion 215 may be a through hole. As shown in FIG. 4 , the gas in the battery accommodating space 11 may pass through the through hole to reach the pressure relief structure 22 . Alternatively, the weakening portion 215 can be a valve body, when the pressure in the battery accommodating space 11 reaches a certain value, the valve body can be opened, and the gas in the battery accommodating space 11 can pass through the valve body to reach the pressure relief structure 22 . The weakened portion 215 can be similar to an explosion-proof structure, such as an explosion-proof valve. When the pressure in the battery accommodating space 11 reaches a certain value, it can break through the explosion-proof structure, and the gas in the battery accommodating space 11 can pass through the explosion-proof structure to reach the pressure relief structure 22 . The specific structure of the weakening portion 215 is not limited here.

In one embodiment, as shown in FIG. 2 , the mounting plate 21 includes: a first plate body 212; Two plate bodies 213; wherein, the second plate body 213 and the pressure relief structure 22 form a gas collecting tank 211, and the gas in the battery accommodating space 11 can be collected into the gas collecting tank 211, thereby ensuring that the gas in the battery accommodating space 11 can pass through The pressure relief structure 22 is collected into the exhaust space 12 and discharged. The arrangement of the second plate body 213 and the first plate body 212 can increase the structural strength of the mounting plate 21 so as to reliably support the battery.

The gas in the battery accommodating space 11 can be collected to the gas collecting tank 211 through the first plate body 212 . The first plate body 212 may be provided with the aforementioned weakened portion 215 , and the weakened portion 215 may be a through hole. As shown in FIG. 4 , the gas in the battery accommodating space 11 can pass through the through hole to reach the pressure relief structure 22 . Alternatively, the weakening portion 215 can be a valve body, when the pressure in the battery accommodating space 11 reaches a certain value, the valve body can be opened, and the gas in the battery accommodating space 11 can pass through the valve body to reach the pressure relief structure 22 . The weakened portion 215 can be similar to an explosion-proof structure, such as an explosion-proof valve. When the pressure in the battery accommodating space 11 reaches a certain value, it can break through the explosion-proof structure, and the gas in the battery accommodating space 11 can pass through the explosion-proof structure to reach the pressure relief structure 22 .

The pressure relief structure 22 is connected to the second plate body 213 , for example, an installation through hole may be provided on the second plate body 213 , and the pressure relief structure 22 is connected to the second plate body 213 to block the installation through hole. A plurality of pressure relief structures 22 may be installed on the second plate body 213 .

The gas in the battery accommodating space 11 can be directly collected into the gas collecting tank 211 . The first plate body 212 may be provided with a through hole, and at least part of the explosion-proof valve of the battery may pass through the through hole and be located in the gas collecting groove 211, so that after the pressure relief structure 22 releases the explosion-proof hole, the gas inside the battery can be directly Entering into the gas collecting tank 211, considering that the battery is located in the battery accommodating space 11, the gas inside the battery directly entering the gas collecting tank 211 can also be understood as the gas in the battery accommodating space 11 can be directly collected to the gas collecting tank 211.

It should be noted that, the first plate body 212 may be provided with a through hole, and the through hole may be a through hole provided on an integral plate, or, a through hole may be formed between two adjacent independent plate bodies. The hole is not limited here.

It should be noted that the gas in the battery accommodating space 11 can be regarded as the gas located outside the battery. For example, the gas inside the battery is discharged from the battery and enters the outside of the battery, and the gas can be collected into the exhaust space 12 through the pressure relief structure 22 . Alternatively, the gas in the battery accommodating space 11 can be regarded as the gas inside the battery, and the gas inside the battery can be directly collected to the exhaust space 12 through the pressure relief structure 22 . In one embodiment, a circulating flow channel 214 is formed between the second plate body 213 and the first plate body 212 , and the second plate body 213 and the first plate body 212 are connected by a second brazing material; wherein the second brazing material The melting point is greater than 300°C, so that the temperature in the battery box can damage the pressure relief structure 22 but will not damage the connection between the second plate body 213 and the first plate body 212 . The second solder may be a 4-series solder.

The second plate body 213 is brazed to the first plate body 212 , and the second plate body 213 is brazed to the pressure relief structure 22 . The circulation flow channel 214 may be a fluid heat exchange channel, and the circulation flow channel 214 may also be a gas heat exchange channel, so as to be used for cooling or heating the batteries inside the battery case.

In one embodiment, as shown in FIG. 1 and FIG. 2 , there is a certain distance between the battery 1 and the separation structure 20 ; wherein, a heat conduction part 23 is provided between the battery and the separation structure 20 , and the heat conduction part 23 exposes the battery Therefore, the separation structure 20 can reliably dissipate heat or heat the battery.

The thermally conductive portion 23 can be an adhesive layer, which not only enables the separation structure 20 to reliably dissipate heat or heat the battery, but also can be used to connect the separation structure 20 and the battery, so as to ensure the stability of the battery. The thermally conductive portion 23 may include ultra-high temperature thermally conductive adhesive, silicone thermally conductive adhesive, epoxy resin AB adhesive, polyurethane adhesive, polyurethane thermally conductive conductive adhesive, thermally conductive silicone grease, and the like.

An embodiment of the present invention also provides a battery pack, including the above-mentioned battery box.

A battery pack according to an embodiment of the present invention includes a battery box, the battery box includes a box body 10 and a partition structure 20 , the partition structure 20 forms a battery accommodating space 11 and an exhaust space 12 in the box body 10 , and the partition structure 20 includes The mounting plate 21 and the pressure relief structure 22, the gas in the battery accommodating space 11 can be collected into the exhaust space 12 through the pressure relief structure 22 and discharged, thereby realizing the pressure relief of the battery box and avoiding safety problems. Since the pressure relief structure 22 and the mounting plate 21 are independently formed structures, the installation of the pressure relief structure 22 can be controlled, thereby reducing the risk of damage to the pressure relief structure 22, thereby ensuring the pressure relief effect.

In one embodiment, the battery pack further includes a battery including a cell and an electrolyte, the smallest unit capable of performing electrochemical reactions such as charge/discharge. The cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein, the polarities of the first electrode and the second electrode can be interchanged. The battery cell is arranged in the battery casing. The battery is arranged in the battery accommodating space 11 . The mounting plate 21 can be used to support the battery.

As shown in FIG. 7 , a plurality of batteries can be formed into a battery module 5 and then arranged in the battery box, and the plurality of batteries can be fixed by the end plates and the side plates. Multiple batteries can be directly arranged in the battery box, that is, there is no need to group multiple batteries, and in this case, the end plate and the side plate can be removed.

An embodiment of the present invention also provides a battery structure, including a main body and a pressure relief structure, the main body is formed with a cavity, and the pressure relief structure is connected to the main body; wherein, the gas in the cavity can make at least part of the pressure relief structure composed of Its connection to the body is disengaged from the body to allow the gas to exit the chamber.

The battery structure of an embodiment of the present invention includes a main body and a pressure relief structure, and the pressure relief structure is connected to the main body, so that the chamber formed by the main body can discharge gas through the pressure relief structure. Because the gas in the chamber can make at least part of the pressure relief structure detach from the main body from its connection with the main body, that is, the pressure relief structure is not damaged, but the pressure relief structure fails from its connection with the main body, so that the pressure relief structure in the chamber is Gas can be vented.

It should be noted that, since the structure of the pressure relief structure itself does not need to be damaged, the structure of the pressure relief structure itself may not be designed with similar thinning, so as to prevent the external gas and liquid from corroding it.

In one embodiment, the pressure relief structure can be separated from the main body at a preset temperature; wherein the preset temperature is a, 100°C≤a≤300°C, so that the gas generated by thermal runaway is discharged from the failure place.

In one embodiment, the pressure relief structure and the main body are connected by the first solder 216, that is, the pressure relief structure and the main body are brazed, and the melting point of the first solder 216 may be 100°C to 300°C, so that the first solder can be The material 216 is damaged and fails at 100 ℃ to 300 ℃, so as to ensure reliable heat dissipation and pressure relief.

In one embodiment, the pressure relief structure includes a first metal piece, the body includes a second metal piece, and the first metal piece is connected to the second metal piece. The first metal piece can be made of aluminum, copper and other materials, and the second metal piece can be made of aluminum, steel and other materials.

In some embodiments, the battery structure may be the battery case described above. For other structures of the battery structure, reference may be made to the above-mentioned battery case, which is not limited here.

In some embodiments, as shown in FIG. 6 , the battery structure may be a battery case or a battery 1 (the battery 1 includes a battery case 2 ), and the battery case may be provided with an explosion-proof hole 4 , a pressure relief structure (such as an explosion-proof valve) 3) It is arranged on the battery case 2 to cover the explosion-proof hole 4 . For the pressure relief structure in this embodiment, reference may be made to the pressure relief structure 22 described above, which will not be repeated here.

It should be noted that, as shown in FIG. 6 , the battery case includes a case part 6 and a cover plate 7 , and the case part 6 and the cover plate 7 are connected to seal the battery cells. The housing part 6 may be provided with explosion-proof holes 4 . Alternatively, the cover plate 7 may be provided with an explosion-proof hole 4 .

An embodiment of the present invention also provides a battery structure, comprising a main body and a pressure relief structure, the main body is formed with a cavity, and the pressure relief structure is connected to the main body; wherein, at least part of the pressure relief structure can be detached at a preset temperature Main body, the preset temperature is a, 100℃≤a≤300℃.

The battery structure of an embodiment of the present invention includes a main body and a pressure relief structure, and the pressure relief structure is connected to the main body, so that the chamber formed by the main body can discharge gas through the pressure relief structure. Because the gas in the chamber can make at least part of the pressure relief structure detach from the main body at a preset temperature, the preset temperature is a, and 100°C≤a≤300°C, so that the gas generated by thermal runaway can be discharged from the failure place in time, Avoid failure to release pressure in time.

It should be noted that at least a part of the pressure relief structure can be separated from the main body at a preset temperature. At this time, the connection between the pressure relief structure and the main body can fail at the preset temperature a, so that it can be realized in the early stage of thermal runaway. The gas is discharged to improve the safety performance of the battery pack. Alternatively, the pressure relief structure may include a first part and a second part, the first part and the second part are connected, and the connection between the first part and the second part may fail at a predetermined temperature a.

In one embodiment, the pressure relief structure and the main body are connected by the first solder 216, that is, the pressure relief structure and the main body are brazed, and the melting point of the first solder 216 may be 100°C to 300°C, so that the first solder can be The material 216 is damaged and fails at 100 ℃ to 300 ℃, so as to ensure reliable heat dissipation and pressure relief.

In one embodiment, the pressure relief structure includes a first metal piece, the body includes a second metal piece, and the first metal piece is connected to the second metal piece. The first metal piece can be made of aluminum, copper and other materials, and the second metal piece can be made of aluminum, steel and other materials.

In some embodiments, the battery structure may be the battery case described above. For other structures of the battery structure, reference may be made to the above-mentioned battery case, which is not limited here.

In some embodiments, as shown in FIG. 6 , the battery structure may be a battery case or a battery 1 (the battery 1 includes a battery case 2 ), and the battery case 2 may be provided with an explosion-proof hole 4 , a pressure relief structure (such as an explosion-proof structure) The valve 3) is arranged on the battery casing 2 to cover the explosion-proof hole 4. For the pressure relief structure in this embodiment, reference may be made to the pressure relief structure 22 described above, which will not be repeated here.

It should be noted that the pressure relief structure 22 can be separated from the mounting plate 21 , or the pressure relief structure can be separated from the main body, which can be considered as at least a partial separation of the pressure relief structure 22 , that is, a part of the pressure relief structure 22 is separated, or the pressure relief structure 22 of all detachment. For example, if the pressure relief structure 22 is broken from the middle thereof, and at this time, the pressure relief structure 22 also releases the internal gas, it can also be considered that the pressure relief structure 22 is separated from the mounting plate or the main body. For example, the first solder 216 or the adhesive between the pressure relief structure 22 and the mounting plate 21 fails. At this time, although the pressure relief structure 22 and the mounting plate 21 are still connected, the pressure relief structure 22 can release the internal gas , it can still be considered that the pressure relief structure 22 is separated from the mounting plate 21 . Therefore, the pressure relief structure 22 mentioned in the above embodiment is disengaged, the key point is that the strength gas can be released through the pressure relief structure 22, and it is not limited that the pressure relief structure 22 must be separated from the mounting plate 21 or the main body.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the inventive creations disclosed herein. This disclosure is intended to cover any modifications, uses, or adaptations of the present invention that follow the general principles of this disclosure and include common knowledge or practice in the art not disclosed by this disclosure means. The specification and example embodiments are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the appended claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of protection of the present disclosure is limited only by the appended claims.

Claims (13)

1. A battery case, characterized by comprising a case body (10) and a partition structure (20), the partition structure (20) being provided in the case body (10) to form a battery housing space (11) and a gas exhaust space (12), the partition structure (20) comprising:

a mounting plate (21);

the pressure relief structure (22), the pressure relief structure (22) and the mounting plate (21) are of independent molding structures, and the pressure relief structure (22) is arranged on the mounting plate (21);

the gas in the battery accommodating space (11) can be collected into the exhaust space (12) through the pressure relief structure (22) and discharged.

2. The battery box according to claim 1, characterized in that the gas in the battery receiving space (11) can make at least part of the pressure relief structure (22) break away from the mounting plate (21) from its connection with the mounting plate (21) so that the gas is collected in the exhaust space (12) and exhausted.

3. The battery box according to claim 1 or 2, characterized in that the pressure relief structure (22) is detachable from the mounting plate (21) at a preset temperature;

wherein the preset temperature is a, and a is more than or equal to 100 ℃ and less than or equal to 300 ℃.

4. The battery case according to claim 3, wherein the pressure relief structure (22) is connected to the mounting plate (21) by a first brazing filler metal (216).

5. The battery box according to claim 3, characterized in that the pressure relief structure (22) is bonded to the mounting plate (21).

6. The battery box according to claim 4 or 5, characterized in that the pressure relief structure (22) is located on the side of the mounting plate (21) close to the battery receiving space (11).

7. The battery box according to claim 4 or 5, characterized in that the pressure relief structure (22) is located on the other side of the mounting plate (21) near the exhaust space (12).

8. The battery box according to claim 1 or 2, characterized in that the mounting plate (21) and the pressure relief structure (22) are formed with a gas collection channel (211);

wherein the gas in the battery accommodating space (11) can be collected into the exhaust space (12) through the gas collecting groove (211) and discharged.

9. The battery box according to claim 8, characterized in that the pressure relief structure (22) forms at least part of a bottom wall (2111) of the gas collection channel (211).

10. The battery box according to claim 8, characterized in that the mounting plate (21) comprises:

a first plate (212);

the second plate body (213), the second plate body (213) is arranged opposite to the first plate body (212), and the pressure relief structure (22) is arranged on the second plate body (213);

the second plate body (213) and the pressure relief structure (22) form the gas collecting groove (211), and gas in the battery accommodating space (11) can be collected to the gas collecting groove (211).

11. The battery case according to claim 10, wherein a circulation flow channel (214) is formed between the second plate body (213) and the first plate body (212), and the second plate body (213) and the first plate body (212) are connected by a second brazing material;

wherein the melting point of the second brazing filler metal is more than 300 ℃.

12. The battery case according to claim 1 or 2, wherein the battery housing space (11) and the air discharge space (12) are stacked one on top of the other.

13. A battery pack characterized by comprising the battery case according to any one of claims 1 to 12.

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