Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack, the battery module comprises a liquid cooling assembly, a support assembly and a battery cell assembly, the liquid cooling assembly comprises two liquid cooling plates, and each liquid cooling plate is internally provided with a liquid cooling cavity; the supporting assembly comprises at least one supporting piece, the supporting piece is arranged between the two liquid cooling plates, and a first liquid cooling flow channel is formed in the supporting piece; the battery cell assembly comprises a plurality of battery cells; wherein at least one supporting piece is arranged on the peripheral side of any battery cell; in the embodiment of the utility model, the two liquid cooling plates can carry out heat dissipation on the two ends of the plurality of battery cells in the battery cell assembly in the first direction, and the supporting piece can also carry out heat dissipation on the peripheral sides of the plurality of battery cells in the battery cell assembly on the basis of supporting the two liquid cooling plates. The heat dissipation area of the battery cell can be effectively increased, so that the heat dissipation efficiency and the heat dissipation effect of the battery cell are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery module and a battery pack. Background Art

[0002] In the related art, the liquid cooling component in the battery module often only cools the bottom of the battery cell. The method for cooling the bottom of the battery cell is to fix the bottom of the module on a liquid cooling plate, and use the flowing coolant to take away the heat from the bottom of the battery cell to dissipate the heat of the battery cell. Although this solution is simple, the heat dissipation efficiency and effect are not good. Once the battery cell has thermal runaway, it is easy to cause the battery cell to catch fire and explode. Utility Model Content

[0003] The embodiments of the utility model provide a battery module and a battery pack, which can improve the technical problem of poor heat dissipation efficiency and heat dissipation effect of the battery module in the related art.

[0004] In a first aspect, an embodiment of the present utility model provides a battery module, the battery module comprising:

[0005] A liquid cooling assembly, comprising two liquid cooling plates, the two liquid cooling plates being spaced apart in a first direction, and each of the liquid cooling plates being provided with a liquid cooling cavity;

[0006] A support assembly, comprising at least one support member, wherein the support member is disposed between the two liquid cooling plates, the support member extends along the first direction, and two ends of the support member in the first direction are respectively connected to the two liquid cooling plates, and a first liquid cooling channel is disposed in the support member; and

[0007] A battery cell assembly, comprising a plurality of battery cells, wherein the plurality of battery cell arrays are arranged between the two liquid cooling plates;

[0008] Wherein, at least one supporting member is arranged on the peripheral side of any of the battery cells.

[0009] In one embodiment, one of the two liquid cooling plates is provided with a liquid inlet, and the other is provided with a liquid outlet, and the liquid inlet and the liquid outlet are respectively connected to the liquid cooling cavity in the corresponding liquid cooling plate;

[0010] The two liquid cooling chambers are both in communication with the plurality of first liquid cooling channels.

[0011] In one embodiment, the support member includes two support portions, both of which extend along the first direction, one end of the two support portions in the first direction is respectively connected to the two liquid cooling plates, and the other ends of the two support portions in the first direction are connected to each other;

[0012] Wherein, sub-channels are arranged in the two support parts, and the sub-channels extend along the first direction. The two sub-channels are interconnected to form the first liquid-cooling channel.

[0013] In one embodiment, the sub-channels penetrate two ends of the corresponding support portion in the first direction;

[0014] A through hole is provided on one side of the liquid cooling plate close to the supporting portion in the first direction, and the through hole is communicated with the liquid cooling cavity and the sub-channel.

[0015] In one embodiment, the liquid cooling plate comprises:

[0016] A first plate member is fixedly connected to the support portion, and the via hole is correspondingly arranged on the first plate member; and

[0017] The second plate is arranged on a side of the first plate away from the support portion in the first direction, and a groove is arranged on a surface of the second plate facing the first plate. The groove is arranged opposite to the through hole in the first direction, and a notch of the groove is sealed and fitted with the surface of the first plate to form the liquid cooling cavity.

[0018] In one embodiment, the support portion is cylindrical, and the wall thickness of the support portion is defined as L; wherein L satisfies:

[0019] 0.9mm≤L≤1.1mm.

[0020] In one embodiment, the battery cell assembly further includes a plurality of battery cell groups, each of the battery cell groups includes a plurality of the battery cells arranged along the second direction;

[0021] The support assembly further comprises a plurality of support member groups, each of the support member groups comprising a plurality of the support members arranged along the second direction;

[0022] The plurality of battery cell groups and the plurality of support member groups are alternately arranged in a third direction, and the first direction, the second direction and the third direction are mutually crossed in pairs.

[0023] In one embodiment, an orthographic projection of one of the battery cells in the battery cell group in the third direction is located between two of the support members in the adjacent support member groups; or

[0024] At least part of the orthographic projection of one of the battery cells in the battery cell group in the third direction is located on two of the support members in the adjacent support member groups.

[0025] In one embodiment, the liquid cooling plate is provided with a mounting groove at an end position corresponding to each of the battery cells, and the mounting groove is configured to allow at least a portion of the battery cell to be embedded.

[0026] In one embodiment, the liquid cooling chamber includes a plurality of second liquid cooling channels spaced apart in a second direction, the plurality of second liquid cooling channels all extend along a third direction, and two adjacent second liquid cooling channels are interconnected; the first direction, the second direction and the third direction intersect each other in pairs.

[0027] In a second aspect, an embodiment of the present invention provides a battery pack, which includes the battery module as described above.

[0028] Beneficial effects of the embodiments of the utility model:

[0029] In an embodiment of the utility model, the two liquid cooling plates can dissipate heat at both ends of the multiple battery cells in the battery cell assembly in the first direction. The support member can not only support the two liquid cooling plates, but also dissipate heat on the surrounding sides of the multiple battery cells in the battery cell assembly. Compared with the heat dissipation method of only cooling the bottom of the battery cell in the related art, the heat dissipation area of ​​the battery cell can be effectively increased, thereby improving the heat dissipation efficiency and heat dissipation effect of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a three-dimensional schematic diagram of a battery module provided by an embodiment of the utility model;

[0032] Figure 2 is an exploded schematic diagram of a battery module provided by an embodiment of the utility model;

[0033] Figure 3 is a cross-sectional schematic diagram of a battery module provided by an embodiment of the utility model;

[0034] Figure 4 It is a schematic diagram of the assembly of the liquid cooling plate and the support part provided by the embodiment of the utility model;

[0035] Figure 5 It is a schematic diagram of the assembly of the first plate and the support part provided in an embodiment of the utility model;

[0036] Figure 6is a cross-sectional schematic diagram of a battery module provided by an embodiment of the utility model;

[0037] Figure 7 It is a cross-sectional schematic diagram of a liquid cooling plate provided in an embodiment of the utility model.

[0038] Reference numerals:

[0039] 1000, battery module; 1, liquid-cooling assembly; 11, liquid-cooling plate; 111, first plate; 112, second plate; 12, liquid-cooling chamber; 121, second liquid-cooling channel; 2, support assembly; 20, support member group; 200, support member; 201, support part; 202, sub-channel; 22, first liquid-cooling channel; 3, battery cell assembly; 30, battery cell group; 301, battery cell; 4, liquid inlet; 5, liquid outlet; 6, groove; 7, mounting groove; 8, via. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0041] In the related art, the liquid cooling component in the battery module often only cools the bottom of the battery cell. The method for cooling the bottom of the battery cell is to fix the bottom of the module on a liquid cooling plate, and use the flowing coolant to take away the heat from the bottom of the battery cell to dissipate the heat of the battery cell. Although this solution is simple, the heat dissipation efficiency and effect are not good. Once the battery cell has thermal runaway, it is easy to cause the battery cell to catch fire and explode.

[0042] In view of this, the utility model proposes a battery module. Figures 1 to 7Some embodiments of the utility model. Wherein, as shown in the direction markings in the accompanying drawings, the X direction is the second direction, the Y direction is the third direction, and the Z direction is the first direction. The first direction, the second direction and the third direction intersect each other in pairs, and the angles between the first direction, the second direction and the third direction are not limited, and can be 80°, 85°, 90°, 95°, 100°; preferably, in the following embodiments, the angles between the first direction, the second direction and the third direction are 90° for explanation, that is, a spatial rectangular coordinate system is established by the first direction, the second direction and the third direction to explain some embodiments of the present application; it should be emphasized that the angles between the first direction, the second direction and the third direction are 90° and do not constitute a limitation on the following embodiments of the present application.

[0043] See also Figures 1 to 3 In some embodiments of the present application, the battery module 1000 includes a liquid cooling component 1 and a battery cell component 3, the liquid cooling component 1 includes two liquid cooling plates 11, the two liquid cooling plates 11 are spaced apart in a first direction Z, and each of the liquid cooling plates 11 is provided with a liquid cooling cavity 12; the battery cell component 3 includes a plurality of battery cells 301, the battery cells 301 extend along the first direction Z, and the plurality of battery cells 301 are arrayed between the two liquid cooling plates 11; that is, the two liquid cooling plates 11 can respectively dissipate heat from both ends of the plurality of battery cells 301 in the first direction Z.

[0044] In some embodiments, the battery module 1000 further includes a support assembly 2, the support assembly 2 includes at least one support member 200, the support member 200 is arranged between the two liquid cooling plates 11, the support member 200 extends along the first direction Z, and the two ends of the support member 200 in the first direction Z are respectively connected to the two liquid cooling plates 11, and a first liquid cooling channel 22 is arranged in the support member 200; wherein, at least one support member 200 is arranged on the peripheral side of any of the battery cells 301. That is, in this embodiment, the support member 200 can play the role of spacing and supporting the two liquid cooling plates 11, and the first liquid cooling channel 22 arranged in the support member 200 can play the role of dissipating heat on the peripheral side of the battery cell 301, that is, the support member 200 has the functions of supporting the liquid cooling plate 11 and dissipating heat on the battery cell 301 at the same time.

[0045] In an embodiment of the utility model, the two liquid cooling plates 11 can dissipate heat at both ends of the multiple battery cells 301 in the battery cell assembly 3 in the first direction Z. The support member 200 can not only support the two liquid cooling plates 11, but also dissipate heat on the surrounding sides of the multiple battery cells 301 in the battery cell assembly 3. Compared with the heat dissipation method of only cooling the bottom of the battery cell in the related art, the heat dissipation area of ​​the battery cell 301 can be effectively increased, thereby improving the heat dissipation efficiency and heat dissipation effect of the battery cell 301.

[0046] It can be understood that, since at least one of the support members 200 is disposed on the circumferential side of each of the battery cells 301 in the battery cell assembly 3 , the uniformity of heat dissipation of the plurality of battery cells 301 in the battery cell assembly 3 can also be improved.

[0047] Furthermore, in the above embodiment, the two liquid cooling plates 11 are supported at intervals by the support member 200, which not only strengthens the structural strength of the battery pack, but also eliminates the need to redesign the support structure to support the two liquid cooling plates 11. Similarly, since the coolant located on the periphery of the battery cell 301 is arranged in the first liquid cooling channel 22 of the support member 200, that is, the coolant is not in direct contact with the battery cell 301, compared with the battery pack adopting immersion heat dissipation in the related art, and the battery cell 301 needs to be in direct contact with the coolant, the battery module 1000 described in the embodiment of the present application can facilitate operators to replace a single battery cell 301 and maintain the entire battery module 1000.

[0048] In addition, the shape of the battery cell 301 is not limited, and can be a columnar battery cell structure, a polygonal battery cell structure, or a special-shaped battery cell structure; specifically, the battery cell 301 can be a cylindrical battery cell, a square battery cell, etc.

[0049] In some embodiments of the present application, the first liquid-cooling channel 22 located in the support member 200 and the liquid-cooling cavity 12 located in the liquid-cooling plate 11 may be interconnected or may not be interconnected.

[0050] In a specific embodiment of the present application, the first liquid-cooling channel 22 and the liquid-cooling cavity 12 are interconnected; and a liquid inlet 4 is provided on one of the two liquid-cooling plates 11, and a liquid outlet 5 is provided on the other, and the liquid inlet 4 and the liquid outlet 5 are respectively connected to the liquid-cooling cavity 12 in the corresponding liquid-cooling plate 11; that is, in this embodiment, the flow path of the coolant in the battery module 1000 is as follows: it flows from the liquid inlet 4 of one liquid-cooling plate 11 to the liquid-cooling cavity 12, then flows from the liquid-cooling cavity 12 into a plurality of the first liquid-cooling channels 22, and then flows from a plurality of the first liquid-cooling channels 22 into the liquid-cooling cavity 12 of another liquid-cooling plate 11, and finally flows out from the liquid outlet 5; the flow path design of the coolant in the battery module 1000 is simple, and only one liquid inlet 4 and one liquid outlet 5 need to be designed to complete the circulation of the coolant in the battery module 1000.

[0051] Please refer again Figures 1 to 3 In some embodiments of the present application, the support member 200 includes two support parts 201, both of which extend along the first direction Z, and one end of the two support parts 201 in the first direction Z is respectively connected to the two liquid cooling plates 11, and the other ends of the two support parts 201 in the first direction Z are connected to each other; wherein, sub-channels 202 are arranged in the two support parts 201, and the sub-channels 202 extend along the first direction Z, and the two sub-channels 202 are connected to each other to form the first liquid cooling channel 22.

[0052] That is, in this embodiment, both of the two liquid cooling plates 11 are connected with a plurality of the supporting parts 201. When assembling the battery module 1000, the battery cell 301 can be installed on one of the liquid cooling plates 11, and then the other liquid cooling plate 11 is fixed to the liquid cooling plate 11 installed with the battery cell 301 along the first direction Z, so that the two supporting parts 201 opposite to each other in the first direction Z are connected to complete the assembly of the battery module 1000, thereby avoiding the structural setting of the supporting member 200 from interfering with the installation of the battery cell 301.

[0053] There is no limitation on the connection form between the two support parts 201 , which can be either adhesive connection or clip connection, on the basis that the problem of coolant leakage will not occur after the two support parts 201 are connected to each other.

[0054] See also Figure 3In some embodiments of the present application, the sub-channel 202 passes through both ends of the corresponding support portion 201 in the first direction Z; the liquid cooling plate 11 is provided with a through hole 8 on one side close to the support portion 201 in the first direction Z, and the through hole 8 is connected to the liquid cooling cavity 12 and the sub-channel 202. Based on the above embodiment, after the two liquid cooling plates 11 and the support member 200 are assembled and formed, a cooling liquid flow path in which two liquid cooling cavities 12 and a plurality of the first liquid cooling channels 22 are connected to each other can be directly formed in the battery module 1000.

[0055] See also Figures 4 to 5 In some embodiments of the present application, the liquid cooling plate 11 includes a first plate 111 and a second plate 112, the first plate 111 is fixedly connected to the support portion 201, and the through hole 8 is correspondingly arranged on the first plate 111; the second plate 112 is arranged on the side of the first plate 111 away from the support portion 201 in the first direction Z, and a groove 6 is arranged on the surface of the second plate 112 facing the first plate 111, and the groove 6 is arranged opposite to the through hole 8 in the first direction Z, and the notch of the groove 6 is sealed and fitted with the surface of the first plate 111 to form the liquid cooling cavity 12. By designing the liquid cooling plate 11 as a structural form in which the first plate 111 and the second plate 112 are combined with each other, the opening of the liquid cooling cavity 12 in the liquid cooling plate 11 can be facilitated.

[0056] See also Figure 6 In some embodiments of the present application, the support portion 201 is cylindrical, and the wall thickness of the support portion 201 is defined as L; wherein, L satisfies: 0.9mm≤L≤1.1mm. In this embodiment, the value of L is designed to satisfy this interval range so that the support portion 201 can meet the support strength requirements of the two liquid cooling plates 11. If the value of L is less than 0.9mm, the support strength of the support portion 201 is poor, resulting in the support portion 201 being broken under the influence of external environmental factors, causing the problem of coolant leakage; if the value of L is greater than 1.1mm, there is a problem that the support portion 201 occupies too large an area between the two liquid cooling plates 11, which reduces the assembly space of the battery cell assembly 3 or other components in the battery module 1000, thereby affecting the capacity density of the battery module 1000.

[0057] See also Figure 1 , Figure 2 and Figure 6In some embodiments of the present application, the battery cell assembly 3 further includes a plurality of battery cell groups 30, each of which includes a plurality of battery cells 301 arranged along the second direction X; the support assembly 2 further includes a plurality of support member groups 20, each of which includes a plurality of support members 200 arranged along the second direction X; wherein the plurality of battery cell groups 30 and the plurality of support member groups 20 are alternately arranged in the third direction Y. In this embodiment, the support members 200 are arranged on both sides of the battery cell 301 in the third direction Y to dissipate heat from the peripheral side of the battery cell 301, thereby increasing the heat dissipation area of ​​the battery cell 301, and further improving the heat dissipation efficiency of the battery cell 301.

[0058] Further, in one embodiment, the orthographic projection of one of the battery cells 301 located in the battery cell group 30 in the third direction Y is located between two of the support members 200 in the adjacent support member group 20. In this arrangement, the adjacent battery cell groups 30 and the plurality of battery cells 301 in the support member group 20 and the plurality of support members 200 are arranged in a staggered arrangement in the second direction X, so that four support members 200 are arranged on the circumference of each battery cell 301, and the four support members 200 simultaneously dissipate heat from the circumference of one battery cell 301, so as to further increase the heat dissipation area of ​​the battery cell 301 and improve the heat dissipation efficiency of the battery cell 301.

[0059] In another embodiment, at least part of the orthographic projection of a cell 301 in the cell group 30 in the third direction Y is located on two support members 200 in the adjacent support member group 20. That is, the adjacent cell group 30 and the plurality of cells 301 and the plurality of support members 200 in the support member group 20 are also arranged in a staggered arrangement in the second direction X, so that four support members 200 are arranged on the peripheral side of each cell 301, and the four support members 200 simultaneously dissipate heat from the peripheral side of one cell 301, so as to further increase the heat dissipation area of ​​the cell 301 and improve the heat dissipation efficiency of the cell 301.

[0060] See also Figure 2In some embodiments of the present application, the liquid cooling plate 11 is provided with a mounting groove 7 at the end position corresponding to each of the battery cells 301, and the mounting groove 7 is configured to allow at least a portion of the battery cell 301 to be embedded. That is, when the battery cell 301 is installed between two of the liquid cooling plates 11, both ends of the battery cell 301 are embedded in the two mounting grooves 7 that are oppositely arranged on the two liquid cooling plates 11, thereby achieving relative fixation of the battery cell 301 and the two liquid cooling plates 11. It can be understood that the groove shape of the mounting groove 7 matches the structural shape of the battery cell 301, so that the battery cell 301 can be fixed and limited in the mounting groove 7.

[0061] See also Figure 4 In some embodiments of the present application, the liquid cooling chamber 12 includes a plurality of second liquid cooling channels 121 spaced apart in a second direction X, the plurality of second liquid cooling channels 121 all extend along a third direction Y, and two adjacent second liquid cooling channels 121 are interconnected; wherein the arrangement of the liquid cooling channels can increase the heat exchange area between the liquid cooling chamber 12 and the battery core assembly 3, thereby improving the heat exchange efficiency between the liquid cooling chamber 12 and the battery core assembly 3.

[0062] It should be noted that the number of the liquid cooling chambers 12 disposed in the liquid cooling plate 11 is not limited. In one embodiment, the number of the liquid cooling chambers 12 disposed in the liquid cooling plate 11 is as follows: Figure 4 As shown in the figure, a liquid cooling chamber 12 is provided in the liquid cooling plate 11; in another embodiment, Figure 7 As shown, two liquid cooling chambers 12 are arranged in one liquid cooling plate 11 .

[0063] The utility model further proposes a battery pack, which includes a battery module 1000. The battery module 1000 is as described above. Since the battery pack adopts all the technical solutions of all the above embodiments, it at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0064] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery module, characterized in that: include: A liquid cooling assembly, comprising two liquid cooling plates, the two liquid cooling plates being spaced apart in a first direction, and each of the liquid cooling plates being provided with a liquid cooling cavity; A support assembly, comprising at least one support member, wherein the support member is disposed between the two liquid cooling plates, the support member extends along the first direction, and two ends of the support member in the first direction are respectively connected to the two liquid cooling plates, and a first liquid cooling channel is disposed in the support member; and A battery cell assembly, comprising a plurality of battery cells, wherein the plurality of battery cell arrays are arranged between the two liquid cooling plates; Wherein, at least one supporting member is arranged on the peripheral side of any of the battery cells.

2. The battery module according to claim 1, characterized in that: One of the two liquid cooling plates is provided with a liquid inlet, and the other is provided with a liquid outlet, and the liquid inlet and the liquid outlet are respectively connected to the liquid cooling cavity in the corresponding liquid cooling plate; The two liquid cooling chambers are both in communication with the plurality of first liquid cooling channels.

3. The battery module according to claim 1, characterized in that: The support member comprises two support parts, one end of the two support parts in the first direction is respectively connected to the two liquid cooling plates, and the other ends of the two support parts in the first direction are connected to each other; Wherein, sub-channels are arranged in the two support parts, and the sub-channels extend along the first direction. The two sub-channels are interconnected to form the first liquid-cooling channel.

4. The battery module according to claim 3, characterized in that: The sub-channels pass through two ends of the corresponding support portion in the first direction; A through hole is provided on one side of the liquid cooling plate close to the supporting portion in the first direction, and the through hole is communicated with the liquid cooling cavity and the sub-channel.

5. The battery module according to claim 4, characterized in that: The liquid cooling plate comprises: A first plate member is fixedly connected to the support portion, and the via hole is correspondingly arranged on the first plate member; and The second plate is arranged on a side of the first plate away from the support portion in the first direction, and a groove is arranged on a surface of the second plate facing the first plate. The groove is arranged opposite to the through hole in the first direction, and a notch of the groove is sealed and fitted with the surface of the first plate to form the liquid cooling cavity.

6. The battery module according to claim 3, characterized in that: The support portion is cylindrical, and the wall thickness of the support portion is defined as L; wherein L satisfies: 0.9mm≤L≤1.1mm.

7. The battery module according to any one of claims 1 to 6, characterized in that: The battery cell assembly further includes a plurality of battery cell groups, each of the battery cell groups including a plurality of the battery cells arranged along the second direction; The support assembly further comprises a plurality of support member groups, each of the support member groups comprising a plurality of the support members arranged along the second direction; The plurality of battery cell groups and the plurality of support member groups are alternately arranged in a third direction, and the first direction, the second direction and the third direction are mutually crossed in pairs.

8. The battery module according to claim 7, characterized in that: An orthographic projection of one of the battery cells in the battery cell group in the third direction is located between two of the support members in the adjacent support member groups; or At least part of the orthographic projection of one of the battery cells in the battery cell group in the third direction is located on two of the support members in the adjacent support member groups.

9. The battery module according to any one of claims 1 to 6, characterized in that: The liquid cooling plate is provided with a mounting groove at an end position corresponding to each of the battery cells, and the mounting groove is configured to allow at least a portion of the battery cell to be embedded.

10. The battery module according to any one of claims 1 to 6, characterized in that: The liquid cooling chamber includes a plurality of second liquid cooling channels spaced apart in a second direction, the plurality of second liquid cooling channels all extend along a third direction, and two adjacent second liquid cooling channels are interconnected; the first direction, the second direction and the third direction intersect each other in pairs.

11. A battery pack, characterized in that: Comprising the battery module according to any one of claims 1 to 10.

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