Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack, the battery module comprises a plurality of battery cells, a gasket and a vapor chamber, the plurality of battery cells are superposed along a first direction, the gasket is abutted between two adjacent battery cells, a mounting gap is formed between the two adjacent battery cells, at least one part of the vapor chamber is mounted in the mounting gap, and the vapor chamber is mounted in the mounting gap. The gasket is attached to the side face of the battery cell, and at least part of the gasket and the vapor chamber do not coincide in the first direction. According to the battery module, the gaskets and the vapor chambers are arranged between the adjacent battery cells, and the vapor chambers are used for balancing the temperatures of the high-temperature areas and the low-temperature areas of the battery cells, so that the temperatures of the surfaces of the battery cells are uniform; therefore, the problem that the service life of the battery cell is affected due to large temperature difference of the battery cell in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular to a battery module and a battery pack. Background Art

[0002] With the development of new energy technology, battery technology is also constantly improving. At present, in order to improve the range of new energy vehicles, the batteries used in new energy vehicles mostly increase the number of batteries or increase the energy density of batteries. The former is limited by installation space, installation cost and vehicle weight, while the latter will cause increased heat due to the high density of the battery.

[0003] In the existing technology, the heat of the battery is mainly generated at the battery tab position, which makes the temperature near the battery tab higher than other areas of the battery, forming a local high-temperature zone, which in turn causes a large temperature difference in the battery cell. The temperature difference phenomenon of the battery cell will directly affect the service life of the battery cell. Utility Model Content

[0004] The main purpose of the present application is to provide a battery module and a battery pack to solve the problem in the related art that the temperature difference in the battery cells affects the service life of the battery cells.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a battery module is provided, which includes a battery cell, wherein a plurality of battery cells are provided and the plurality of battery cells are stacked along a first direction; a gasket, wherein the gasket abuts between two adjacent battery cells, and an installation gap is formed between the two adjacent battery cells; and a heat spreader, wherein at least a portion of the heat spreader is installed inside the installation gap and is attached to the side of the battery cell, and the gasket and the heat spreader do not overlap at least partially along the first direction.

[0006] Furthermore, the gasket and the vapor chamber do not overlap at all along the first direction, and along the first direction, the thickness of the gasket is greater than the thickness of at least two vapor chambers.

[0007] Furthermore, the gasket is arranged on the lower side of the heat spreader along the height direction of the battery cell; or the gasket includes a plurality of sub-gaskets, and the plurality of sub-gaskets are arranged along the outer circumference of the heat spreader.

[0008] Furthermore, the gasket is formed with an avoidance groove, and at least a portion of the heat spreader is arranged inside the avoidance groove.

[0009] Furthermore, the battery module also includes a shell; a heat sink, the heat sink, the battery cell, the gasket and the heat spreader are all arranged inside the shell, the heat sink is arranged on the top side of the battery cell, and a part of the heat spreader extends out of the gap and contacts the heat sink for heat dissipation.

[0010] Furthermore, portions of the two vapor chambers disposed between two adjacent battery cells that are exposed outside the gap are bent in opposite directions along a first direction to form coplanar support surfaces, and the heat sink is supported on the support surfaces.

[0011] Furthermore, the heat spreaders and the battery cells are arranged in a one-to-one correspondence, and the portion of the heat spreader exposed outside the gap is bent toward one side of the corresponding battery cell.

[0012] Furthermore, the heat sink is a plate structure with multiple fins provided on the side of the plate structure facing away from the battery cell; or the heat sink is a thermally conductive adhesive coating provided on the top of the heat spreader; or the heat sink is a liquid cooling plate with liquid cooling medium flowing inside the liquid cooling plate.

[0013] Furthermore, the battery module also includes a connector, and two adjacent battery cells are electrically connected through the connector. Along a second direction perpendicular to the first direction, one end of the connector is connected to the battery cell, and the other end of the connector is bent toward the bottom or top side of the battery cell.

[0014] Furthermore, the connecting piece includes a first bending section and a second bending section. The first bending section has an avoidance hole with an avoidance gap. The first bending section forms two parts respectively connected to the two battery cells with the avoidance hole as the boundary, and the heat sink is located in the avoidance hole.

[0015] Furthermore, the first bending section and the second bending section are integrally formed; and / or the first bending section and the second bending section are vertically arranged; and / or the second bending section extends along the height direction of the battery core.

[0016] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a battery pack is provided, which includes the above-mentioned battery module.

[0017] By applying the technical solution of the present application, a battery module is provided with a gasket and a vapor chamber between adjacent battery cells, wherein the vapor chamber is used to balance the temperature of the high-temperature area and the low-temperature area of ​​the battery cell to achieve a uniform temperature on the surface of the battery cell, thereby overcoming the problem of the battery cell in the prior art that the battery cell life is affected by the large temperature difference. The gasket is provided between two adjacent battery cells so that a gap is formed between the two battery cells along the first direction. The gap is used to provide an installation position for the vapor chamber. The provision of the gasket and the gap facilitates the gasket to play a role of buffering and providing supplement when the battery cell expands. At the same time, the gap provides deformation space for the battery cell to deform, so that the battery cell will not directly abut against the vapor chamber after expansion, causing damage to the vapor chamber and the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0019] Figure 1 A schematic diagram of the three-dimensional structure of the battery module without a heat sink of the present application is shown;

[0020] Figure 2 An exploded view of the battery module of the present application is shown, wherein the heat sink is a liquid cooling plate;

[0021] Figure 3 A schematic diagram of the three-dimensional structure of the battery module of the present application is shown, wherein the heat sink is a liquid cooling plate;

[0022] Figure 4 A front view of the battery module of the present application is shown, wherein the heat sink is a liquid cooling plate;

[0023] Figure 5 An exploded view of the battery module of the present application is shown, wherein the heat sink is a plate structure with fins;

[0024] Figure 6 A schematic diagram of the three-dimensional structure of the battery module of the present application is shown, wherein the heat sink is a plate structure with fins;

[0025] Figure 7 A schematic diagram showing the structure of a gasket and a heat spreader arrangement in the present application is shown;

[0026] Figure 8 A schematic diagram showing the structure of another gasket and vapor chamber arrangement of the present application is shown;

[0027] Figure 9 A schematic diagram of the three-dimensional structure of the connector of the present application is shown.

[0028] The above drawings include the following reference numerals:

[0029] 10. Battery cell; 110. Gap; 20. Gasket; 210. Sub-gasket; 30. Heat spreader; 310. Support surface; 40. Insulation sheet; 50. End plate; 60. Connector; 610. First bending section; 611. Avoidance hole; 620. Second bending section; 70. Liquid cooling plate; 80. Plate structure; 810. Fin. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary, not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0033] Example 1

[0034] In order to solve the problem in the prior art that the temperature difference phenomenon in the battery cells affects the service life of the battery cells, the present application provides a battery module.

[0035] The present application achieves a uniform temperature effect by disposing a heat spreader 30 in the battery module, effectively solving the problem of a large temperature difference in the battery cell 10 affecting the life of the battery cell 10 .

[0036] like Figures 1 to 9 As shown, the battery module includes a battery cell 10, a gasket 20 and a heat spreader 30. A plurality of battery cells 10 are provided, and the plurality of battery cells 10 are stacked along a first direction. The gasket 20 abuts between two adjacent battery cells 10, and an installation gap 110 is formed between the two adjacent battery cells 10. At least a portion of the heat spreader 30 is installed inside the installation gap 110 and is attached to the side of the battery cell 10. The gasket 20 and the heat spreader 30 do not overlap at least partially along the first direction.

[0037] The sides of two adjacent battery cells 10 facing each other are respectively provided with a vapor chamber 30 , and the two vapor chambers 30 located in the same installation gap 110 are spaced apart along the first direction.

[0038] Specifically, the heat spreader 30 has the effect of uniform heat conduction, and by fitting the heat spreader 30 to the side of the battery cell 10, the heat generated by the battery cell 10 is evenly transferred through the heat spreader 30 to the entire surface of the battery cell 10 that is in contact with the heat spreader 30.

[0039] The battery module in this embodiment adopts a gasket 20 and a heat spreader 30 set between adjacent battery cells 10, wherein the heat spreader 30 is used to balance the temperature of the high-temperature area and the low-temperature area of ​​the battery cell 10 to achieve uniform temperature on the surface of the battery cell 10, thereby overcoming the problem in the prior art that the battery cell 10 is affected by the large temperature difference.

[0040] In this embodiment, the vapor chamber 30 is positioned in close contact with the large surface of the battery cell 10. Specifically, the first direction is the width of a single battery cell 10, the length of the battery cell 10 is the second direction, and the side formed by the length and the height of the battery cell 10 is the large surface of the battery cell 10. Specifically, the side of two adjacent battery cells 10 facing each other is the large surface of the battery cell 10. The close contact between the vapor chamber 30 and the large surface of the battery cell 10 can better evenly distribute the heat of the battery cell 10 and avoid large temperature differences.

[0041] The first direction is Figure 1 The X direction is shown, and the second direction is Figure 1 In the Y direction shown, the height direction of the battery cell 10 is Figure 1 The Z direction is shown.

[0042] In this embodiment, the material of the heat sink 30 can be C1020 oxygen-free copper or C5191 alloy copper.

[0043] In this embodiment, the gasket 20 can be an XPP gasket 20 made of a foam material, or a gasket 20 made of an elastically deformable plastic material. The gasket 20 is disposed between two adjacent battery cells 10 so that a gap 110 is formed between the two battery cells 10 along a first direction. The gap 110 is used to provide an installation location for the vapor chamber 30. The arrangement of the gasket 20 and the gap 110 facilitates the gasket 20 to act as a buffer and supplement when the battery cell 10 expands. The gap 110 also provides deformation space for the battery cell 10 to deform, thereby preventing the battery cell 10 from directly contacting the vapor chamber 30 after expansion, thereby causing damage to the vapor chamber 30 and the battery cell 10.

[0044] like Figures 1 to 6 As shown, in this embodiment, the two heat spreaders 30 located in the same gap 110 are spaced apart along the first direction. The structural arrangement of the compartments prevents the battery cells 10 from expanding and squeezing the heat spreaders 30 and causing collisions between them.

[0045] Specifically, the gasket 20 and the vapor chamber 30 in this embodiment do not overlap at all along the first direction, and the thickness of the gasket 20 along the first direction is greater than the thickness of at least two vapor chambers 30. Since the thickness of the gasket 20 is greater than the thickness of the two vapor chambers 30, the thickness of the gap 110 formed by the gasket 20 between two adjacent battery cells 10 is greater than the thickness of the two vapor chambers 30, thereby enabling the two vapor chambers 30 to be spaced apart.

[0046] In this embodiment, the gasket 20 and the vapor chamber 30 are disposed between two adjacent battery cells 10 in the same group. According to the different structures of the gasket 20 and the vapor chamber 30 , this embodiment provides the following three implementation methods.

[0047] like Figure 7 In the specific embodiment shown, the gasket 20 is disposed on the lower side of the heat spreader 30 along the height direction of the battery cell 10 .

[0048] Specifically, the heat spreader 30 and the gasket 20 are arranged in an upper and lower structure along the height direction of the battery cell 10, which is conducive to the gasket 20 providing a stable gap 110, thereby improving the stability of the overall structure; and the heat spreader 30 and the gasket 20 are arranged in an upper and lower structure along the height direction of the battery cell 10, which is convenient for installation and conducive to improving installation efficiency.

[0049] like Figure 8 In the illustrated embodiment, the gasket 20 includes a plurality of sub-gaskets 210 , which are disposed along the outer periphery of the vapor chamber 30 .

[0050] Specifically, by adopting a plurality of sub-gaskets 210 and arranging them on the outer peripheral side of the heat spreader 30 , it is beneficial to evenly apply force between the gasket 20 and the battery cell 10 , and facilitates the stable installation of the heat spreader 30 .

[0051] Furthermore, there can be two sub-gaskets 210, which are symmetrically arranged on both sides of the heat spreader 30; there can also be three sub-gaskets 210, which are symmetrically arranged on both sides of the heat spreader 30, and the other sub-gasket 210 is arranged on the bottom side of the heat spreader 30.

[0052] In a specific embodiment not shown in the figure, the gasket 20 is formed with an avoidance groove, and at least a portion of the heat sink 30 is disposed inside the avoidance groove.

[0053] Specifically, by setting an avoidance groove on the gasket 20, the placement space of the heat spreader 30 is increased. The structural setting of the avoidance groove on the gasket 20 is conducive to improving the installation accuracy of the heat spreader 30, thereby avoiding the phenomenon of misalignment during installation of the heat spreader 30, which is conducive to improving the installation efficiency; at the same time, the structural setting of the avoidance groove can achieve the function of limiting the heat spreader 30, which is conducive to the stability of the installation of the heat spreader 30.

[0054] like Figures 2 to 6 As shown, the battery module also includes a shell and a heat sink. The heat sink, battery cell 10, gasket 20 and heat spreader 30 are all arranged inside the shell. The heat sink is arranged on the top side of the battery cell 10, and a part of the heat spreader 30 extends out of the gap 110 and contacts the heat sink for heat dissipation.

[0055] Specifically, a heat sink is provided to cool the heat spreader 30 , thereby evenly cooling the battery cells 10 through the heat spreader 30 , which is beneficial to improving the efficiency of the battery cells 10 and avoiding the phenomenon of low efficiency caused by high temperature of the battery cells 10 .

[0056] In this embodiment, the portions of the two vapor chambers 30 disposed between two adjacent battery cells 10 that are exposed outside the gap 110 are bent in opposite directions along a first direction to form coplanar support surfaces 310 , and the heat sink is supported on the support surfaces 310 .

[0057] A support surface 310 is formed on each of the two vapor chambers 30 to support the heat sink via the support surface 310. In the present application, the vapor chamber 30 is generally arranged in an L-shaped structure.

[0058] Furthermore, the vapor chamber 30 is disposed in a one-to-one correspondence with the battery cells 10, and the portion of the vapor chamber 30 exposed outside the gap 110 is bent toward one side of the corresponding battery cell 10. The one-to-one correspondence between the vapor chamber 30 and the battery cell 10 ensures effective heat dissipation for the battery cell 10. Since there is a large space at the top of the battery cell 10, bending the vapor chamber 30 toward the corresponding battery cell 10 facilitates forming a larger support surface 310, thereby improving heat dissipation and enhancing the stability of the supporting heat sink.

[0059] In this embodiment, the heat sink is used to cool the vapor chamber. Depending on the structural setting of the heat sink for cooling, the heat sink can adopt air cooling, liquid cooling and corresponding glue cooling.

[0060] In this embodiment, if Figure 5 and Figure 6 As shown, when the heat sink is air-cooled, the heat sink is a plate structure 80, and a plurality of fins 810 are provided on the side of the plate structure 80 facing away from the battery cell 10. By providing a plurality of fins 810, the area in contact with the air is increased, so as to achieve improved heat dissipation effect when gas flows through the fins 810.

[0061] It can be understood that the heat sink can be a heat spreader 30 that allows air flow through the fins 810 through the air inlet on the shell; or a part of the heat sink can be exposed on the outside of the battery cell 10 to facilitate the flow of gas through the fins 810 to dissipate heat to the heat spreader 30; or a blowing component can be set to blow air to the fins 810 to dissipate heat to the heat spreader 30.

[0062] In this embodiment, if Figure 2 、 Figure 3 and Figure 4 As shown, when the heat sink performs liquid cooling, the heat sink is a liquid cooling plate 70, and a liquid cooling medium flows inside the liquid cooling plate 70.

[0063] Specifically, the liquid cooling plate 70 has a liquid cooling channel inside and is connected to the liquid supply mechanism and liquid return mechanism outside the battery module, thereby realizing the flow of liquid cooling medium inside the liquid cooling plate 70, and using the liquid cooling medium for heat exchange to cool the heat plate 30.

[0064] In this embodiment, when a heat dissipation structure using glue is adopted, the heat dissipation element is a thermally conductive glue coating disposed on the top of the heat spreader 30. The heat dissipation efficiency of the heat spreader 30 is increased by the provision of the thermally conductive glue.

[0065] like Figures 1 to 9 As shown, the battery module also includes a connector 60, and two adjacent battery cells 10 are electrically connected through the connector 60. Along a second direction perpendicular to the first direction, one end of the connector 60 is connected to the battery cell 10, and the other end of the connector 60 is bent toward the bottom or top side of the battery cell 10.

[0066] It is understandable that the other end of the connector 60 can be bent toward the bottom or top of the battery cell 10 as needed, so as to achieve misalignment with the heat spreader 30 .

[0067] Specifically, the connector 60 is used to achieve electrical connection between the battery cells 10. The connector 60 in this embodiment is bent in the second direction toward the bottom or top of the battery cell 10, and is thus misaligned with the heat spreader 30, avoiding occupying the setting space of the heat spreader 30, increasing the installable space of the heat spreader 30, and thereby improving the effect of the heat spreader 30 in uniformly distributing the temperature of the battery cells 10.

[0068] The connecting member 60 is preferably a copper busbar or an aluminum busbar.

[0069] In this embodiment, if Figure 9 As shown, the connector 60 includes a first bending section 610 and a second bending section 620 . The first bending section 610 has a avoidance hole 611 for avoiding the gap 110 . The first bending section 610 is divided into two parts connected to the two battery cells 10 respectively with the avoidance hole 611 as the boundary.

[0070] The heat spreader 30 is located in the avoidance hole 611 .

[0071] Specifically, by setting the avoidance hole 611 , the two parts connected by the avoidance hole 611 are spaced apart along the first direction, and then the two parts are adapted to be electrically connected to two adjacent battery cells 10 .

[0072] Furthermore, the setting of the avoidance hole 611 can allow the heat spreader 30 to pass through, so that the heat spreader 30 can pass through the avoidance hole 611 and extend toward the top side of the battery cell 10.

[0073] In this embodiment, the first bending section 610 and the second bending section 620 are integrally formed. The integrally formed structure is beneficial to improving the connection strength of the first bending section 610 and the second bending section 620, and is also beneficial to improving the production efficiency of the connecting member 60.

[0074] In this embodiment, the first bending section 610 and the second bending section 620 are arranged vertically, and the second bending section 620 extends along the height direction of the battery cell 10. The vertical arrangement of the first bending section 610 and the second bending section 620 facilitates the installation of the connector 60. The arrangement of the second bending section 620 along the height line of the battery cell 10 prevents the second bending section 620 from being easily bent toward the battery cell 10 or the housing due to force, thereby improving the stability of the installation of the connector 60.

[0075] like Figures 1 to 6 As shown, the battery module also includes an outer shell, an end plate 50 and an insulating sheet 40. A plurality of battery cells 10 are stacked along a first direction to form a group of battery cells 10. The group of battery cells 10 is arranged inside the outer shell, and the end plate 50 is arranged inside the outer shell. End plates 50 are provided at both ends of the group of battery cells 10 along the first direction, and the insulating sheet 40 is padded between the end plate 50 and the group of battery cells 10.

[0076] Specifically, the end plates 50 are arranged at both ends of the first direction of the battery cell 10 group to protect the battery cell 10 group and also to position the battery cell 10 group. By arranging an insulating sheet 40 between the end plate 50 and the battery cell 10 group, leakage is avoided and the stability of the operation of the battery module is ensured.

[0077] In this embodiment, the end plate 50 and the battery cell 10 group are preferably connected by wrapping tape to fix the end plate 50 and the battery cell 10 group.

[0078] Example 2

[0079] This embodiment provides a battery pack, which includes the battery module of Embodiment 1. The battery pack of this embodiment includes the battery module of this embodiment, so the battery pack provided by this embodiment has a uniform overall temperature, which is conducive to improving the service life of the battery pack.

[0080] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0081] The battery module adopts a method of setting a gasket 20 and a heat spreader 30 between adjacent battery cells 10, wherein the heat spreader 30 is used to balance the temperature of the high-temperature area and the low-temperature area of ​​the battery cell 10 to achieve a uniform temperature on the surface of the battery cell 10, thereby overcoming the problem of the battery cell 10 in the prior art that the battery cell 10 has a large temperature difference, which affects the life of the battery cell 10. The gasket 20 is set between two adjacent battery cells 10 so that a gap 110 is formed between the two battery cells 10 along the first direction. The gap 110 is used to provide an installation position for the heat spreader 30. The arrangement of the gasket 20 and the gap 110 is conducive to achieving the role of the gasket 20 in buffering and providing supplement when the battery cell 10 expands. At the same time, the gap 110 provides deformation space for the battery cell 10 to deform, so that the battery cell 10 will not directly abut against the heat spreader 30 after expansion, causing damage to the heat spreader 30 and the battery cell 10.

[0082] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0083] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0084] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0085] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery module, characterized in that: include: A battery cell (10), wherein a plurality of the battery cells (10) are provided, and the plurality of battery cells (10) are stacked along a first direction; a gasket (20), the gasket (20) being in contact between two adjacent battery cells (10), so that an installation gap (110) is formed between the two adjacent battery cells (10); A heat spreader (30), at least a portion of which is installed inside the installation gap (110) and affixed to the side of the battery cell (10), and the gasket (20) and the heat spreader (30) at least partially do not overlap along the first direction.

2. The battery module according to claim 1, wherein: The gasket (20) and the heat spreader (30) do not overlap at all along the first direction, and along the first direction, the thickness of the gasket (20) is greater than the thickness of at least two of the heat spreaders (30).

3. The battery module according to claim 1, wherein: Along the height direction of the battery core (10), the gasket (20) is arranged on the lower side of the heat spreader (30); or The gasket (20) includes a plurality of sub-gaskets (210), and the plurality of sub-gaskets (210) are arranged along the outer peripheral side of the heat spreader (30).

4. The battery module according to claim 1, wherein: The gasket (20) is formed with an avoidance groove, and at least a portion of the heat spreader (30) is arranged inside the avoidance groove.

5. The battery module according to any one of claims 1 to 4, characterized in that: The battery module further includes: shell; A heat sink, wherein the heat sink, the battery cell (10), the gasket (20) and the heat spreader (30) are all arranged inside the housing, the heat sink is arranged on the top side of the battery cell (10), and a portion of the heat spreader (30) extends out of the gap (110) to contact the heat sink for heat dissipation.

6. The battery module according to claim 5, characterized in that: Portions of the two heat spreaders (30) disposed between two adjacent battery cells (10) exposed outside the gap (110) are bent in opposite directions along the first direction to form two coplanar support surfaces (310), and the heat sink is supported on the support surfaces (310).

7. The battery module according to claim 6, characterized in that: The heat spreader (30) and the battery core (10) are arranged in a one-to-one correspondence, and the portion of the heat spreader (30) exposed outside the gap (110) is bent toward one side of the corresponding battery core (10).

8. The battery module according to claim 5, characterized in that: The heat sink is a plate structure (80), and a plurality of fins (810) are provided on a side of the plate structure (80) facing away from the battery core (10); or The heat sink is a heat-conducting adhesive coating provided on the top of the heat spreader (30); or The heat sink is a liquid cooling plate (70), and a liquid cooling medium flows inside the liquid cooling plate (70).

9. The battery module according to any one of claims 1 to 4, characterized in that: The battery module further comprises a connector (60), and two adjacent battery cells (10) are electrically connected via the connector (60). Along a second direction perpendicular to the first direction, one end of the connecting member (60) is connected to the battery core (10), and the other end of the connecting member (60) is bent toward the bottom or top of the battery core (10).

10. The battery module according to claim 9, characterized in that: The connecting member (60) comprises a first bending section (610) and a second bending section (620); the first bending section (610) is provided with a avoidance hole (611) for avoiding the gap (110); the first bending section (610) is formed into two parts respectively connected to the two battery cells (10) with the avoidance hole (611) as a boundary; the heat spreader (30) is located in the avoidance hole (611).

11. The battery module according to claim 10, characterized in that: The first bending section (610) and the second bending section (620) are integrally formed; and / or The first bending section (610) and the second bending section (620) are arranged vertically.

12. A battery pack, characterized in that: The battery pack includes the battery module according to any one of claims 1 to 11.

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