CN220553499U - Battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack. The battery pack includes: the battery comprises a shell, two electrode assemblies and an electric core, wherein the two electrode assemblies are led out from the same side of the shell and are arranged at intervals, and at least part of the heat exchange assembly is arranged between the two electrode assemblies; the battery cell is arranged in the shell and is electrically connected with the electrode assembly, a gap is formed between the battery cell and the inner surface of one side of the shell, on which the electrode assembly is arranged, and the gap is smaller than or equal to 0.5mm; an insulating paint layer is arranged on the outer surface of the shell. The battery pack can improve the heat dissipation effect of the battery so as to improve the structural performance and the safety performance of the battery pack.

Description

Battery pack

Technical Field

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

Background

In the existing battery pack, heat at the battery is required to be dissipated in time so as to avoid thermal runaway of the battery. However, the insulating film is wrapped on the surface of the battery, so that the heat in the battery cannot be rapidly dissipated due to poor heat conduction performance, and the temperature rise in the battery is severe, so that thermal runaway is extremely easy to occur.

Therefore, how to improve the heat dissipation effect of the battery is a technical problem to be solved.

Disclosure of Invention

The utility model provides a battery pack, which can improve the heat dissipation effect of a battery so as to improve the structural performance and the safety performance of the battery pack.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

according to a first aspect of the present utility model, there is provided a battery pack comprising: the battery comprises a shell, two electrode assemblies and an electric core, wherein the two electrode assemblies are led out from the same side of the shell and are arranged at intervals, and at least part of the heat exchange assembly is arranged between the two electrode assemblies; the battery cell is arranged in the shell and is electrically connected with the electrode assembly, a gap is formed between the battery cell and the inner surface of one side of the shell, on which the electrode assembly is arranged, and the gap is smaller than or equal to 0.5mm; an insulating paint layer is arranged on the outer surface of the shell.

It should be noted that, the thermal conductivity of the insulating paint layer that the group battery that this application provided adopted is superior to conventional insulating film, when setting up heat exchange assembly between two electrode assemblies, after the inside heat transfer of electric core to the casing, owing to insulating paint layer has better thermal conductivity, so insulating paint layer can be with the heat quick transfer to external environment of casing, also can pass through the casing and transmit heat exchange assembly fast, utilize heat exchange assembly to dispel the heat, in order to promote the radiating effect of battery, and then make the battery satisfy the demand of high-rate quick charge, promote the security performance and the structural performance of group battery.

Drawings

For a better understanding of the present application, reference may be made to the embodiments illustrated in the following drawings. The 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 application. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. Wherein:

fig. 1 is a schematic perspective view of a battery pack according to an embodiment of the present disclosure;

FIG. 2 is a schematic illustration in semi-section of the structure of FIG. 1;

fig. 3 is a cross-sectional view of a second perspective structure of a battery pack provided in an embodiment of the present application;

fig. 4 is a cross-sectional view of a third perspective structure of a battery pack according to an embodiment of the present application.

The reference numerals are explained as follows:

100. a battery; 110. a housing; 111. a housing member; 112. a cover plate body; 120. an electrode assembly; 130. a battery cell; 200. a heat exchange assembly; 300. an insulating paint layer; 400. and a pressure relief structure.

Detailed Description

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

In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present application can be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, which are described in the exemplary embodiments of the present application, are described with the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present application. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

The embodiment of the application provides a battery pack. Fig. 1 is a schematic perspective view of a battery pack according to an embodiment of the present disclosure; fig. 2 is a schematic diagram of the structure of fig. 1 in semi-section. Referring to the structure shown in fig. 1 to 2, the battery pack includes: the battery 100 comprises a shell 110, two electrode assemblies 120 and an electric core 130, wherein the two electrode assemblies 120 are led out from the same side of the shell 110 and are arranged at intervals, and at least part of the heat exchange assembly 200 is arranged between the two electrode assemblies 120; the battery cell 130 is arranged in the shell 110 and is electrically connected with the electrode assembly 120, and a gap is formed between the battery cell 130 and the inner surface of one side of the shell 110, on which the electrode assembly 120 is arranged, and is smaller than or equal to 0.5mm; the outer surface of the housing 110 is provided with an insulating paint layer 300.

Specifically, in the battery pack provided in the embodiment of the present application, the electrode assemblies 120 are led out from the same side of the casing 110 and are arranged at intervals therebetween, so as to improve the space utilization rate of the battery 100 in the battery pack; a battery cell 130 is provided inside the case 110, and the battery cell 130 is connected with the electrode assembly 120 to connect the battery cell 130 inside the battery 100 with external devices through the electrode assembly 120; the heat exchange assembly 200 is disposed between the two electrode assemblies 120 to improve the space utilization of the battery pack, and the heat exchange assembly 200 is used for heat exchange with the battery 100; the insulating varnish layer 300 disposed on the outer surface of the battery 100 can effectively protect the battery 100, and simultaneously, can accelerate the heat exchange process between the battery 100 and the outside.

It should be understood that the heat exchange position of the heat exchange assembly 200 with the housing 110 is mainly at the portion of the housing 110 corresponding to the heat exchange assembly 200. Since the battery cells 130 exchange heat with the housing 110 throughout the heat dissipation process of the battery cells 130, heat at the portion of the housing 110 corresponding to the heat exchange assembly 200 may come from multiple orientations. Specifically, the battery cell 130 exchanges heat with the side of the case 110 where the electrode assembly 120 is disposed; the battery cell 130 also has heat exchange at other positions of the case 110 where the electrode assembly 120 is not disposed, wherein heat at other positions of the case 110 where the electrode assembly 120 is not disposed can be transferred to the position of the case 110 where the electrode assembly 120 is disposed, so as to enhance the heat exchange effect between the heat exchange assembly 200 and the battery cell 130.

It should be noted that, in the present embodiment, the gap between the battery cell 130 and the inner surface of the side of the housing 110 where the electrode assembly 120 is disposed is less than or equal to 0.5mm, so that the distance between the battery cell 130 and the heat exchange assembly 200 can be shortened to enhance the heat exchange effect between the heat exchange assembly 200 and the battery cell 130.

Of course, the heat inside the battery 100 may be dissipated to the external environment through the case 110 in addition to the heat exchange with the heat exchange assembly 200, so as to cool the battery 100.

It should be noted that, the thermal conductivity of the insulating paint layer 300 adopted by the battery pack provided by the embodiment of the application is superior to that of a conventional insulating film, when the heat exchange assembly 200 is arranged between the two electrode assemblies 120, after the heat inside the battery cell 130 is transferred to the shell 110, the insulating paint layer 300 can quickly transfer the heat of the shell 110 to the external environment, and also can quickly transfer the heat of the shell 110 to the heat exchange assembly 200 through the shell 110, so that the heat exchange assembly 200 is utilized to dissipate the heat, and the heat dissipation effect of the battery 100 is improved, so that the battery 100 meets the requirement of high-rate quick charge, and the safety performance and the structural performance of the battery pack are improved.

With continued reference to the structure shown in fig. 1 and 2, when the battery cell 130 is disposed inside the case 110, a gap value between the battery cell 130 and an inner surface of the case 110 on the side where the electrode assembly 120 is disposed is preferably 0, that is, the battery cell 130 and the case 110 are preferably in an abutting state on the side.

However, since there may be an assembly gap between the battery cell 130 and the case 110, there may be a gap of not more than 0.5mm between the battery cell 130 and the inner surface of the case 110 on the side where the electrode assembly 120 is disposed. In addition, if the battery cell 130 cannot be maintained in a completely flat state toward the inner wall of the case 110 due to factors such as manufacturing processes, gaps between the respective positions of the battery cell 130 and the inner surface of the case 110 on the side where the electrode assembly 120 is disposed may be different. Illustratively, a partial region of the battery cell 130 is in contact with the inner surface of the case 110 on the side where the electrode assembly 120 is disposed, and at this time, the gap value at this position is 0mm; a partial region of the battery cell 130 is not in contact with the inner surface of the case 110 on the side where the electrode assembly 120 is disposed, and a gap at this position is 0.5mm or less.

With continued reference to the structure shown in fig. 1 and 2, to improve stability of the relative position between the heat exchange assembly 200 and the battery 100, the heat exchange assembly 200 and the housing 110 may be bonded. Further, the heat exchange assembly 200 and the housing 110 are bonded by using a glue layer, for example, the glue layer may be set to be a heat conducting glue, so as to improve the heat exchange effect between the heat exchange assembly 200 and the battery 100 on the premise of improving the stability between the heat exchange assembly 200 and the battery 100.

It should be appreciated that in this embodiment, the heat exchange assembly 200 may include a heat exchange plate, which may be a liquid cooled plate.

In addition, an insulating varnish layer 300 may be provided at other portions of the battery 100. In one embodiment, referring to the structure shown in fig. 3, an insulating varnish layer 300 is further disposed on the inner surface of the housing 110.

It should be noted that, when the insulating varnish layer 300 is attached to both the inner surface and the outer surface of the housing 110, the insulating varnish layers 300 attached to the inner surface and the outer surface of the housing 110 may cooperate with each other to increase the heat transfer rate of the battery 100.

Specifically, the heat generated by the battery cell 130 firstly contacts the insulating paint layer 300 attached to the inner surface of the housing 110, and then the insulating paint layer 300 can utilize the better heat conducting property of the insulating paint layer to quickly transfer the heat to the inner surface of the housing 110 to which the insulating paint layer 300 is attached; then, the insulating paint layer 300 attached to the outer wall of the shell 110 can rapidly transfer heat at the shell 110 by utilizing the better heat conducting property of the insulating paint layer; the heat exchange assembly 200 disposed between the two electrode assemblies 120 can exchange heat with the housing 110 in time, so that the heat transferred from the insulating paint layer 300 is rapidly cooled, and the battery 100 meets the requirement of high-rate rapid charging, and the safety performance and the structural performance of the battery pack are improved.

Notably, the insulating paint layer 300 may be sprayed or coated on the surface of the case 110. In a specific embodiment, the insulating paint layer 300 covers the entire inner surface of the case 110; in another specific embodiment, the insulating varnish layer 300 covers a portion of the inner surface of the housing 110.

In one embodiment, referring to the structure shown in fig. 4, the housing 110 includes a housing member 111 and a cover body 112, the housing member 111 has an opening, and the cover body 112 is snapped into the opening to seal the battery cell 130; the electrode assembly 120 is disposed on the cover body 112; an insulating varnish layer 300 is provided on the housing part 111.

It should be noted that, the insulating paint layer 300 may be sprayed or coated on the outer surface and/or the inner surface of the housing member 111, so as to accelerate the heat transfer efficiency from the battery cell 130 to the outside of the housing member 111, enhance the heat exchange capability between the heat exchange assembly 200 and the housing 110, and utilize the heat exchange assembly 200 to dissipate heat, so that the battery 100 meets the requirement of high-rate fast charging, and improve the safety performance and the structural performance of the battery pack.

In one embodiment, the insulating varnish layer 300 is further provided on the cover plate body, and the insulating varnish layer 300 is located on a surface of the cover plate body opposite to the heat exchange assembly 200.

It should be noted that the insulating paint layer 300 may be sprayed or coated on the outer surface and/or the inner surface of the cover plate body to accelerate the heat exchange effect between the battery 100 and the external environment and/or the heat exchange assembly 200.

In one embodiment, the cell 130 includes a cell body and a tab portion that exits from the cell body and is located on a side of the cell body facing the heat exchange assembly 200.

It should be understood that the common cell body mainly includes both winding type and lamination type. The wound cell main body is mainly formed by winding and placing a positive electrode plate and a negative electrode plate, and the stacked cell main body is mainly formed by stacking the positive electrode plate and the negative electrode plate, and a diaphragm is arranged between the positive electrode plate and the negative electrode plate no matter the wound cell main body or the stacked cell main body. The portions of the positive and negative electrode sheets having active material constitute the cell main body, and the portions of the positive and negative electrode sheets having no active material constitute the tabs in the cell 130. The positive electrode tab and the negative electrode tab can be located at one end of the battery core main body together or located at two ends of the battery core main body respectively; after the lugs with the multiple positive polarities are folded, the lug with the positive polarity is formed, and after the lugs with the multiple negative polarities are folded, the lug with the negative polarity is formed. As shown in fig. 1, in the battery 100 provided in the embodiment of the present application, the positive-polarity tab portion and the negative-polarity tab portion are located on the same side of the battery cell main body and are disposed towards the tab assembly, so as to facilitate heat dissipation in the battery cell main body and connection between the tab portion and the electrode assembly 120.

It is worth noting that, because the tab portion bears the overcurrent function and generates larger heat, the battery cell 130 in the battery pack provided by the embodiment of the application is preferably a laminated battery cell 130, the heat transfer of the laminated battery cell 130 is also faster, the periphery of the laminated battery cell 130 is provided with an opening surface, the heat dissipation efficiency is faster than that of the coiled battery cell 130, and the heat exchange effect between the battery 100 and the outside can be improved.

In addition, it should be noted that, in the battery pack provided by the embodiment of the application, the heat transfer rate of the same pole piece (positive pole or negative pole piece) in the leading-out direction of the pole lug is relatively fast, when the pole lug is arranged on the side of the battery core main body facing the heat exchange component 200, the arrangement direction of the heat exchange component 200 and the battery 100 corresponds to the leading-out direction of the pole lug from the pole piece, so that the heat exchange component 200 can cool the heat generated by the battery 100 more timely and fast, and the battery 100 can meet the requirement of high-rate fast charge.

During charge and discharge of the battery 100, the active material of positive polarity and the active material of negative polarity react with the electrolyte, and the tab is connected to the electrode terminal to form a current loop. It is understood that the electrolyte is composed of electrolyte, organic solvent, and additives. The electrolyte is an important material inside the battery 100, and is capable of transporting lithium ions and providing power required by the battery 100, and is a key component for the battery 100 to exert energy.

In one embodiment, the number of cells 130 within the housing 110 is a plurality. It should be understood that "plurality" refers to at least two.

It should be noted that the number of the battery cells 130 in the housing 110 may be plural, so as to reduce the difficulty in manufacturing the battery 100 and increase the capacity of the battery 100.

In a particular embodiment, a plurality of cells 130 are stacked in a pole piece stacking direction, wherein the pole ears of each cell 130 lead from the same side. Illustratively, two battery cells 130 are disposed in the housing 110, and the positive-polarity tab portion in one battery cell 130 and the positive-polarity tab portion in the other battery cell 130 are connected to the same pole; the tab portion of one cell 130 having a negative polarity and the tab portion of the other cell 130 having a negative polarity are connected to the other terminal.

In one embodiment, the thickness of the insulating varnish layer 300 is 40 μm to 300 μm.

It should be understood that, if the thickness of the insulating varnish layer 300 is too small, the insulating varnish layer 300 cannot protect the housing 110, and if the insulating varnish layer 300 is scratched, the housing 110 is easily contacted with an external structure and short-circuited, which may affect the safety performance of the battery 100; if the thickness of the insulating varnish layer 300 is too large, the efficiency of the insulating varnish layer 300 in transferring heat is reduced, and the heat exchanging effect of the heat exchanging assembly 200 and the battery 100 is affected.

It should be noted that, in this embodiment, through setting up the thickness of insulating paint layer 300 in the above-mentioned scope, can ensure insulating paint layer 300 to the insulating effect of casing 110 to and can guarantee that insulating paint layer 300 carries out heat exchange, dispels the heat to battery 100 with casing 110 with heat exchange assembly 200 with the heat in the casing 110 fast transfer to external environment, and then makes battery 100 satisfy the demand that high-multiplying power was filled soon, promotes the security performance and the structural performance of group battery.

For example, when the thickness of the insulating varnish layer 300 is set, the thickness value of the insulating varnish layer 300 may be one of the following values.

40μm、50μm、60μm、70μm、80μm、90μm、100μm、110μm、120μm、130μm、140μm、150μm、160μm、170μm、180μm、190μm、200μm、210μm、220μm、230μm、240μm、250μm、260μm、270μm、280μm、290μm、300μm。

In one embodiment, in the battery pack provided in the embodiment of the present application, the battery 100 further includes an insulating separator, and the battery cell 130 is abutted to an inner surface of the side of the case 110 where the electrode assembly 120 is disposed through the insulating separator. It should be appreciated that the abutment between the cell 130 and the housing 110 is an "indirect abutment". The insulating spacer insulates the housing 110 from the battery cell 130.

It should be noted that, in the present embodiment, the insulating spacer has a relatively thin thickness and a substantially plate-shaped structure, and the insulating spacer has a relatively good heat conduction effect between the battery cell 130 and the housing 110, so as to improve the heat exchange effect between the heat exchange assembly 200 and the battery 100. Meanwhile, the structure of the butt joint between the battery cell 130 and the shell 110 can be used for facilitating heat exchange between the battery cell 130 with higher temperature and the shell 110, and improving the cooling effect of the heat exchange assembly 200 on the battery cell 130, so that the safety performance of the battery pack is improved.

It should be understood that the insulating spacer in this embodiment is different from the existing lower plastic structure. The thickness of the existing lower plastic structure is thicker, in addition, the two sides of the lower plastic are generally provided with bulges which are propped against the battery core, and a hole is formed between the battery core and the lower plastic at the center of the battery core, so that the heat conduction effect is poor.

In one embodiment, please continue to refer to the structure shown in fig. 1 and 2, in this embodiment, the height of the electrode assembly 120 penetrating out of the cover plate body 112 is greater than or equal to the thickness of the heat exchange assembly 200.

It should be noted that, in the present embodiment, the thickness of the heat exchange assembly 200 is smaller than the size of the electrode assembly 120 penetrating out of the cover plate body 112. The structure can avoid the heat exchange assembly 200 occupying excessive space in the battery pack, and can improve the space utilization rate of the structure in the battery pack. Meanwhile, since the thickness of the heat exchange assembly 200 does not exceed the size of the electrode assembly 120 protruding out of the cover plate body 112, the connection between the electrode assembly 120 and the structures such as the conductive bars is facilitated, and the assembly difficulty can be reduced.

It is noted that, when specifically setting the thickness of the heat exchange assembly 200 in the embodiment of the present application, the thickness of the heat exchange assembly 200 may be set to be consistent with the height of the protruding cover plate body 112 of the electrode assembly 120, so as to ensure the volume of the heat exchange assembly 200 as much as possible, thereby facilitating the arrangement of more refrigerants in the heat exchange assembly 200, facilitating the improvement of the cooling effect of the heat exchange assembly 200 on the battery 100, and improving the safety performance of the battery pack.

Alternatively, the thickness of the heat exchange assembly 200 may be smaller than the height of the electrode assembly 120 protruding from the cover plate body 112, so as to avoid interference between the heat exchange assembly 200 and other structures, which is not described in detail.

In one embodiment, referring to the structure shown in fig. 2 to 4, the battery 100 further includes a pressure relief structure 400, the pressure relief structure 400 is disposed on the housing 110, and the pressure relief structure 400 and the heat exchange assembly 200 are disposed on opposite sides of the housing 110.

Specifically, when the pressure of the gas in the battery 100 reaches a certain value, the part of the gas is ejected out of the pressure release structure 400 into the battery 100 to release the pressure, so as to ensure the safety performance of the battery pack.

It should be understood that the pressure relief structure 400 may be a through hole, a thin plate or a score provided at the bottom of the housing 110, which will not be described herein.

It should be noted that, in the present embodiment, the heat exchange assembly 200 and the pressure release structure 400 are disposed on opposite sides of the battery 100. The heat exchange assembly 200 can be avoided in this structure setting to avoid the pressure release structure 400 to break through the heat exchange assembly 200 when carrying out the pressure release, so that arrange the heat exchange assembly 200 near battery 100, simplify the heat exchange assembly 200 structure, simultaneously, guarantee the heat exchange effect of heat exchange assembly 200 and battery 100.

In one embodiment, the battery pack is a battery pack, the battery pack further includes a case, the battery 100 is disposed in the case, and the pressure release structure 400 is located on a side of the battery 100 near a bottom plate of the case.

It should be noted that, in the present embodiment, after the high-pressure gas in the housing 110 is discharged from the pressure release structure 400, the high-pressure gas can enter the bottom region of the housing, so as to avoid the high-pressure gas from spraying other structural members in the housing, thereby improving the safety performance of the battery pack.

It should be understood that, after the battery 100 is placed in the case, a side of the case 110 facing the bottom plate of the case is a bottom surface, and a side of the case 110 facing away from the bottom plate of the case is a top surface. It is noted that, in arranging the structure of the battery 100, the electrode assembly 120 may be provided to protrude from the top surface of the case 110 so as to arrange other structures on the top of the battery 100.

In a specific embodiment, please continue to refer to the structure shown in fig. 1 and 2, the heat exchange assembly 200 is disposed on top of the battery 100, so as to reasonably optimize the structural layout of the battery 100 and improve the flatness of the battery 100 after being placed in the case.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the application being indicated by the following claims. It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of protection of the application is limited only by the claims that follow.

Claims (10)

1. A battery pack, comprising: the battery comprises a shell, two electrode assemblies and an electric core, wherein the two electrode assemblies are led out from the same side of the shell and are arranged at intervals, and at least part of the heat exchange assembly is arranged between the two electrode assemblies; the battery cell is arranged in the shell and is electrically connected with the electrode assembly, a gap is formed between the battery cell and the inner surface of one side of the shell, on which the electrode assembly is arranged, and the gap is smaller than or equal to 0.5mm; an insulating paint layer is arranged on the outer surface of the shell.

2. The battery of claim 1, wherein the insulating paint layer is further disposed on an inner surface of the housing.

3. The battery of claim 1, wherein the housing comprises a housing member and a cover body, the housing member having an opening, the cover body snap-fitting the opening to seal the cells; the electrode assembly is arranged on the cover plate body; the insulating paint layer is arranged on the shell piece.

4. The battery pack of claim 3, wherein the insulating paint layer is further provided on the cover body, and the insulating paint layer is provided on a surface of the cover body opposite to the heat exchange assembly.

5. The battery of claim 1, wherein the number of cells in the housing is a plurality.

6. The battery of any of claims 1-5, wherein the cells are laminated cells.

7. The battery according to any one of claims 1 to 5, wherein the thickness of the insulating varnish layer is 40 μm to 300 μm.

8. The battery pack according to any one of claims 1 to 5, wherein the battery further comprises an insulating separator, and the battery cell is abutted against an inner surface of a side of the case where the electrode assembly is disposed, through the insulating separator.

9. The battery of any of claims 1-5, wherein the battery further comprises a pressure relief structure disposed on the housing and the pressure relief structure and the heat exchange assembly are on opposite sides of the housing.

10. The battery of claim 9, wherein the battery is a battery pack; the battery pack also comprises a box body, the battery is arranged in the box body, and the pressure relief structure is positioned on one side of the battery, which is close to the bottom plate of the box body.