Battery shell, battery monomer and battery module

Abstract

The utility model relates to the technical field of batteries, in particular to a battery shell, a battery monomer and a battery module. A containing cavity is formed in the battery shell and used for containing a battery cell, and the battery cell is attached to the inner wall of the containing cavity. A flow channel is arranged in at least one surface of the battery shell, the flow channel is arranged along the height direction of the battery shell, a liquid inlet and a liquid outlet are formed in at least one surface of the battery shell, the liquid inlet and the liquid outlet are both communicated with the flow channel, and the flow channel is configured to be filled with cooling liquid. The battery shell can reduce the temperature difference between the top and the bottom of the battery cell, improve the temperature equalization effect, prolong the service life of the battery cell, reduce the potential safety hazard and achieve the purpose of saving the cost.

Description

Technical Field

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

[0002] The liquid cooling device of the battery in the prior art is usually arranged at the bottom of the battery module, and the battery is cooled by the liquid cooling device so that the battery can work within a reasonable temperature range. However, since the liquid cooling device is located at the bottom of the battery, this causes a phenomenon that the temperature at the top of the battery is high and the temperature at the bottom is low along the height direction of the battery, resulting in a large temperature difference at different positions of the same battery, and further causing a phenomenon of local lithium deposition at the bottom of the battery, affecting the service life of the battery and increasing potential safety hazards.

[0003] Therefore, it is urgent to design a battery housing, a battery cell and a battery module to solve the above technical problems. Summary of the Utility Model

[0004] The first object of the utility model is to provide a battery housing, which can reduce the temperature difference between the top and the bottom of the battery cell, improve the temperature equalization effect, extend the service life of the battery cell and reduce potential safety hazards.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] The utility model provides a battery housing, in which a containing chamber is arranged, the containing chamber is used for containing a battery cell, and the battery cell is attached to the inner wall of the containing chamber. A flow channel is arranged inside at least one surface of the battery housing, the flow channel is arranged along the height direction of the battery housing, an inlet and an outlet are arranged on at least one surface of the battery housing, both the inlet and the outlet are communicated with the flow channel, and the flow channel is configured to be filled with a coolant.

[0007] As an optional technical solution of the battery housing, N partitions are arranged in the flow channel along the height direction of the battery housing, the N partitions divide the flow channel into N + 1 sub-flow channels, and two adjacent sub-flow channels are communicated with each other, where N is a positive integer.

[0008] As an optional technical solution of the battery housing, a gap is arranged between the partition and the bottom of the flow channel, and two adjacent sub-flow channels are communicated with each other through the gap.

[0009] As an optional technical solution of the battery housing, the battery housing includes two relatively arranged first surfaces and two relatively arranged second surfaces, and the first surface and the second surface are adjacent to enclose the containing chamber.

[0010] As an alternative technical solution of the battery housing, the area of the first surface is larger than that of the second surface, at least one of the first surfaces is provided with the flow channel inside, and both the liquid inlet and the liquid outlet are arranged on the first surface.

[0011] As an alternative technical solution of the battery housing, the flow channels are arranged inside both of the first surfaces, and a through groove is arranged inside one of the second surfaces, and the through groove is configured to communicate the flow channels inside the two first surfaces.

[0012] As an alternative technical solution of the battery housing, along the direction perpendicular to the first surface, the ratio of the projected area of the first surface to the projected area of the flow channel is between 1.05 and 2.0.

[0013] As an alternative technical solution of the battery housing, the flow channel penetrates through the top of the first surface and forms an opening on the top of the first surface, and the battery housing further includes a sealing member, and the sealing member plugs the opening;

[0014] Or, both the top and the bottom of the first surface are solid structures.

[0015] As an alternative technical solution of the battery housing, a protruding portion protrudes from the top of the first surface, and both the liquid inlet and the liquid outlet are arranged on the protruding portion.

[0016] As an alternative technical solution of the battery housing, the height of the protruding portion is set to be between 0.1 cm and 5 cm.

[0017] The second object of the present utility model is to provide a battery cell, which has high heat exchange performance and good uniformity effect, can reduce the temperature difference between the top and the bottom of the battery core, extend the service life, and reduce potential safety hazards.

[0018] To achieve this purpose, the present utility model adopts the following technical solutions:

[0019] The present utility model provides a battery cell, which includes a battery core, a cover plate, a bottom plate and the above-mentioned battery housing, the battery core is accommodated in the accommodation chamber of the battery housing, the battery housing has a first opening and a second opening, the cover plate is sealed to the first opening, and the cover plate is connected to the battery core, and the bottom plate is sealed to the second opening.

[0020] The third object of the present utility model is to provide a battery module, which has high heat exchange performance and good uniformity effect, can reduce the temperature difference between the top and the bottom of the battery core, extend the service life, and reduce potential safety hazards.

[0021] To achieve this purpose, the present utility model adopts the following technical solutions:

[0022] The present utility model provides a battery module, which includes more than one of the above-mentioned battery cells, and the multiple battery cells are stacked along the thickness direction of the battery core.

[0023] As an alternative technical solution of a battery module, the battery module includes a first connecting pipe and a second connecting pipe. The first connecting pipe connects the liquid inlet ports on two adjacent battery cells, and the second connecting pipe connects the liquid outlet ports on two adjacent battery cells.

[0024] As an alternative technical solution of a battery module, an explosion-proof valve is provided on the cover plate. Along the height direction of the battery cell, both the first connecting pipe and the second connecting pipe are arranged offset from the explosion-proof valve on the cover plate.

[0025] As an alternative technical solution of a battery module, a flow channel is provided inside a first surface of the battery housing. The multiple battery cells are stacked along the thickness direction of the battery core, and a battery core is provided between two first surfaces of two adjacent battery cells.

[0026] The beneficial effects of the present utility model at least include:

[0027] The present utility model provides a battery housing, in which a receiving chamber is provided. The receiving chamber is used to receive the battery core, and the battery core is attached to the inner wall of the receiving chamber. A flow channel is provided inside at least one surface of the battery housing. The flow channel is arranged along the height direction of the battery housing. An inlet port and an outlet port are provided on at least one surface of the battery housing. Both the inlet port and the outlet port are communicated with the flow channel, and the flow channel is configured to be filled with a coolant. By providing a flow channel inside at least one surface of the battery housing, and the arrangement direction of the flow channel is consistent with the height direction of the battery core (i.e., the height direction of the battery housing), in actual work, the coolant can flow from the inlet port into the flow channel, then fill the flow channel, and finally flow out from the outlet port. Since the battery core is attached to the inner wall of the receiving chamber, the heat on the battery core can be taken away by the coolant in the flow channel, thereby achieving the effect of reducing the temperature of the battery core. Since the arrangement direction of the flow channel is consistent with the height direction of the battery core, the top and bottom positions of the battery core are both cooled by the coolant, so as to minimize the temperature difference between the top and bottom of the battery core, improve the uniform effect on the battery core, avoid the phenomenon of local lithium deposition at the bottom of the battery core, extend the service life, reduce potential safety hazards, and achieve the purpose of cost savings.

[0028] The present utility model also provides a battery cell, which has high heat transfer performance and good uniform effect, can reduce the temperature difference between the top and bottom of the battery core, extend the service life, and reduce potential safety hazards.

[0029] The present utility model also provides a battery module, which has high heat exchange performance and good uniformity effect, can reduce the temperature difference between the top and bottom of the battery cells, extend the service life, and reduce potential safety hazards. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the content of the embodiments of the present utility model and these drawings.

[0031] Figure 1 is a schematic structural diagram of the battery cell provided by the embodiment of the present utility model;

[0032] Figure 2 is an exploded view of the battery cell provided by the embodiment of the present utility model;

[0033] Figure 3 is a sectional view of the battery cell provided by the embodiment of the present utility model;

[0034] Figure 4 is a schematic structural diagram of the battery module provided by the embodiment of the present utility model;

[0035] Figure 5 is an exploded view of the battery module provided by the embodiment of the present utility model.

[0036] Reference Signs

[0037] 100, battery housing; 110, accommodation chamber; 120, flow channel; 130, liquid inlet; 140, liquid outlet; 150, partition; 160, gap; 170, first surface; 180, second surface; 190, protruding portion; 200, cover plate; 210, explosion-proof valve; 300, bottom plate; 400, first connecting pipe; 500, second connecting pipe. Detailed Embodiments

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0039] Accordingly, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0040] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0042] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0044] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0045] This embodiment provides a battery housing that can reduce the temperature difference between the top and bottom of the battery cell, improve the temperature equalization effect, extend the service life of the battery cell, and reduce potential safety hazards.

[0046] As Figures 1-3 shown, a receiving chamber 110 is provided inside the battery housing 100. The receiving chamber 110 is used to receive the battery cell, and the battery cell is attached to the inner wall of the receiving chamber 110. A flow channel 120 is provided inside at least one surface of the battery housing 100. The flow channel 120 is arranged along the height direction of the battery housing 100. An inlet 130 and an outlet 140 are provided on at least one surface of the battery housing 100. Both the inlet 130 and the outlet 140 are communicated with the flow channel 120, and the flow channel 120 is configured to be filled with a coolant.

[0047] Specifically, in this embodiment, the flow channel 120 can be provided inside one or more surfaces of the battery housing 100, and the arrangement direction of the flow channel 120 is consistent with the height direction of the battery cell (i.e., the height direction of the battery housing 100). In this way, during actual operation, the coolant can flow from the inlet 130 into the interior of the flow channel 120, then fill the flow channel 120, and finally flow out from the outlet 140. Since the battery cell is attached to the inner wall of the receiving chamber 110, the heat on the battery cell can be taken away by the coolant in the flow channel 120, thereby achieving the effect of reducing the temperature of the battery cell. Since the arrangement direction of the flow channel 120 is consistent with the height direction of the battery cell, the coolant can dissipate heat from both the top and bottom positions of the battery cell, thereby minimizing the temperature difference between the top and bottom of the battery cell as much as possible, improving the uniform effect on the battery cell, avoiding the phenomenon of local lithium deposition at the bottom of the battery cell, extending the service life, reducing potential safety hazards, and achieving the purpose of cost savings.

[0048] It can be understood that when the temperature of the battery cell is lower than the set value, the coolant in this embodiment also has a heating function and can heat the battery cell through heat transfer of the battery housing 100.

[0049] As Figure 3As shown, in this embodiment, N partitions 150 are arranged in the flow channel 120 along the height direction of the battery housing 100. Specifically, the N partitions 150 extend along the height direction of the battery housing 100 and are equidistantly arranged along the width direction of the battery housing 100. In this way, when the coolant flows from the liquid inlet 130 into the flow channel 120, the coolant can timely fall to the bottom of the flow channel 120 under the action of gravity, improving the heat exchange efficiency, and thus avoiding the problem that the partition 150 causes resistance to the flow of the coolant when the partition 150 is arranged horizontally. The N partitions 150 divide the flow channel 120 into N + 1 sub-flow channels, and two adjacent sub-flow channels are interconnected. A gap 160 is provided between the partition 150 and the bottom of the flow channel 120, and two adjacent sub-flow channels are interconnected through the gap 160. In this way, coolant flows in each sub-flow channel, avoiding the phenomenon that the heat exchange efficiency is reduced due to the occurrence of a dead zone of coolant flow.

[0050] Optionally, N in this embodiment can be set to values such as 1, 2, 3, 4, etc., and N is a positive integer.

[0051] Optionally, the partition 150 is welded to the side wall of the flow channel 120, improving the mechanical strength of the battery housing 100 and extending the service life.

[0052] As Figures 1-3 shown, in this embodiment, the battery housing 100 includes two relatively arranged first surfaces 170 and two relatively arranged second surfaces 180. The first surface 170 and the second surface 180 are adjacent to enclose a containing chamber 110. Specifically, the first surface 170 and the second surface 180 are welded or integrally formed, and the two first surfaces 170 and the two second surfaces 180 enclose a rectangular containing chamber 110, which can then be used to contain a square battery cell.

[0053] Furthermore, the area of the first surface 170 in this embodiment is larger than the area of the second surface 180. At least one flow channel 120 is arranged inside the first surface 170, and both the liquid inlet 130 and the liquid outlet 140 are arranged on the first surface 170. It can be understood that the first surface 170 is the large surface where the battery cell contacts the battery housing 100. By arranging the flow channel 120 inside the first surface 170, the contact area between the battery cell and the battery housing 100 is increased, thereby improving the heat exchange efficiency, improving the temperature uniformity effect on the battery cell, and reducing potential safety hazards.

[0054] In some embodiments, the operator can arrange flow channels 120 inside both of the first surfaces 170, further improving the heat exchange efficiency and improving the temperature uniformity effect on the battery cell.

[0055] Specifically, flow channels 120 are provided inside both of the two first faces 170, and a through groove (not shown in the figure) is provided inside one of the second faces 180. The through groove is configured to connect the flow channels 120 inside the two first faces 170. This enables the flow channels 120 inside the two first faces 170 to be connected by the through groove inside the second face 180, thereby increasing the heat exchange area and improving the heat exchange efficiency.

[0056] Optionally, in this embodiment, along the direction perpendicular to the first face 170, the ratio of the projected area of the first face 170 to the projected area of the flow channel 120 is between 1.05 and 2.0. Exemplarily, the ratio can be set to values such as 1.05, 1.2, 1.3, 1.4, 1.5, 2.0, etc. Thus, on the premise of ensuring the mechanical strength of the first face 170, the heat exchange area of the flow channel 120 is increased as much as possible to improve the heat exchange efficiency.

[0057] Optionally, in this embodiment, the flow channel 120 penetrates through the top of the first face 170 and forms an opening at the top of the first face 170. The battery housing 100 further includes a seal (not shown in the figure), and the seal plugs the opening, thereby ensuring the sealing performance of the battery housing 100, avoiding the phenomenon of coolant leakage, and improving safety. Optionally, the seal can be set as a silicone part or a metal part, etc.

[0058] In some embodiments, both the top and bottom of the first face 170 are solid structures, so that there is no need to use a seal to perform additional sealing work on the opening, improving the work efficiency and the sealing performance of the battery housing 100.

[0059] Furthermore, as Figures 1-3 shown, a protruding portion 190 protrudes from the top of the first face 170 in this embodiment, and both the liquid inlet 130 and the liquid outlet 140 are provided on the protruding portion 190. This enables both the liquid inlet 130 and the liquid outlet 140 to be located at a relatively high position of the battery housing 100, so that the coolant in the flow channel 120 can fill the flow channel 120 as much as possible, thereby improving the heat exchange efficiency for the battery cells, improving the temperature uniformity effect, and avoiding the phenomenon of heat exchange dead zones.

[0060] Optionally, the height of the protruding portion 190 in this embodiment can be set between 0.1 cm and 5 cm. For example, the protruding portion 190 can be set to values such as 0.1 cm, 1 cm, 3 cm, 5 cm, etc., so as to facilitate the setting of the liquid inlet 130 and the liquid outlet 140.

[0061] Optionally, the battery housing 100 in this embodiment is made of a metal material, for example, it can be processed and made of materials such as aluminum alloy or stainless steel.

[0062] As Figures 1-3As shown in the figure, this embodiment also provides a battery cell, which includes a battery core, a cover plate 200, a bottom plate 300, and the above-mentioned battery housing 100. The battery core is accommodated in the accommodation chamber 110 of the battery housing 100. The battery housing 100 has a first opening and a second opening. The cover plate 200 is sealed to the first opening and is connected to the battery core, and the bottom plate 300 is sealed to the second opening. The battery core in this embodiment can be set as a square wound core wound, or other types of battery cores, which will not be elaborated here.

[0063] The battery cell in this embodiment has high heat transfer performance and good uniformity effect, can reduce the temperature difference between the top and bottom of the battery core, extend the service life, and reduce potential safety hazards.

[0064] As Figures 4-5 shown in the figure, this embodiment also provides a battery module, which includes a plurality of the above-mentioned battery cells, and the plurality of battery cells are stacked along the thickness direction of the battery core.

[0065] Specifically, a flow channel 120 is provided inside a first surface 170 of the battery housing 100. The plurality of battery cells are stacked along the thickness direction of the battery core, and a battery core is provided between two first surfaces 170 of two adjacent battery cells. This enables each first surface 170 (large surface) of each battery cell to exchange heat with the battery cores on both adjacent sides. In other words, heat exchange can be achieved on both large surfaces of each battery core, thereby improving the heat exchange efficiency, reducing potential safety hazards, and improving the temperature uniformity effect of the battery core.

[0066] As Figures 4-5 shown in the figure, the battery module in this embodiment includes a first connecting pipe 400 and a second connecting pipe 500. The first connecting pipe 400 connects the liquid inlets 130 on two adjacent battery cells, and the second connecting pipe 500 connects the liquid outlets 140 on two adjacent battery cells. This can connect the flow channels 120 on each battery housing 100, realize the series connection function of multiple flow channels 120, improve the integration of the battery module, and facilitate assembly.

[0067] Furthermore, as Figures 4-5 shown in the figure, an explosion-proof valve 210 is provided on the cover plate 200. Along the height direction of the battery cell, both the first connecting pipe 400 and the second connecting pipe 500 are arranged in a staggered manner with the explosion-proof valve 210 on the cover plate 200. This can enable both the first connecting pipe 400 and the second connecting pipe 500 to avoid the explosion-proof valve 210, so as not to affect the exhaust and pressure relief work of the explosion-proof valve 210, and improve the safety performance of the battery module.

[0068] This battery module has high heat transfer performance and good uniformity effect, can reduce the temperature difference between the top and bottom of the battery core, extend the service life, and reduce potential safety hazards.

[0069] Obviously, the above are only the preferred embodiments of the present utility model and the technical principles applied. Those skilled in the art will understand that the present utility model is not limited to the specific embodiments here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present utility model. Therefore, although the present utility model has been described in detail through the above embodiments, the present utility model is not limited to the above embodiments only. Without departing from the concept of the present utility model, more other equivalent embodiments can be included, and the scope of the present utility model is determined by the scope of the appended claims.

[0070] Note that in the description of this specification, the descriptions referring to the terms "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A battery housing, wherein a housing chamber (110) is provided in the battery housing (100), the housing chamber (110) is used to accommodate a battery cell, and the battery cell is attached to an inner wall of the housing chamber (110), characterized in that: A flow channel (120) is provided inside at least one side of the battery housing (100), and the flow channel (120) is arranged along the height direction of the battery housing (100). A liquid inlet (130) and a liquid outlet (140) are provided on at least one side of the battery housing (100), and the liquid inlet (130) and the liquid outlet (140) are both connected to the flow channel (120), and the flow channel (120) is configured to be filled with coolant.

2. The battery housing according to claim 1, characterized in that: N partitions (150) are arranged in the flow channel (120) along the height direction of the battery housing (100), and the N partitions (150) divide the flow channel (120) into N+1 sub-flow channels, and two adjacent sub-flow channels are connected to each other, and N is a positive integer.

3. The battery housing according to claim 2, characterized in that: A gap (160) is provided between the partition plate (150) and the bottom of the flow channel (120), and two adjacent sub-flow channels are connected to each other through the gap (160).

4. The battery housing according to claim 1, characterized in that: The battery housing (100) comprises two first surfaces (170) arranged opposite to each other and two second surfaces (180) arranged opposite to each other, wherein the first surfaces (170) and the second surfaces (180) are adjacent to each other to enclose the accommodating chamber (110).

5. The battery casing according to claim 4, characterized in that: The area of ​​the first surface (170) is greater than the area of ​​the second surface (180), the flow channel (120) is arranged inside at least one of the first surfaces (170), and the liquid inlet (130) and the liquid outlet (140) are both arranged on the first surface (170).

6. The battery casing according to claim 5, characterized in that: The flow channels (120) are disposed inside the two first surfaces (170), and a through groove is disposed inside one of the second surfaces (180), and the through groove is configured to connect the flow channels (120) in the two first surfaces (170).

7. The battery case according to claim 5, characterized in that: Along a direction perpendicular to the first surface (170), a ratio of a projected area of ​​the first surface (170) to a projected area of ​​the flow channel (120) is between 1.05 and 2.

0.

8. The battery casing according to claim 5, characterized in that: The flow channel (120) passes through the top of the first surface (170) and forms an opening at the top of the first surface (170); the battery housing (100) further comprises a sealing member, and the sealing member is sealed at the opening; Alternatively, the top and bottom of the first surface (170) are both solid structures.

9. The battery case according to claim 5, characterized in that: A protruding portion (190) is protruding from the top of the first surface (170), and the liquid inlet (130) and the liquid outlet (140) are both arranged on the protruding portion (190).

10. The battery casing according to claim 9, characterized in that: The height of the protruding portion (190) is set to be between 0.1 cm and 5 cm.

11. A battery cell, characterized in that: The battery cell comprises a battery cell, a cover plate (200), a bottom plate (300) and a battery casing (100) according to any one of claims 1 to 10, wherein the battery cell is accommodated in a accommodating chamber (110) of the battery casing (100), the battery casing (100) having a first opening and a second opening, the cover plate (200) being sealed at the first opening, the cover plate (200) being connected to the battery cell, and the bottom plate (300) being sealed at the second opening.

12. A battery module, characterized in that: The battery module comprises a plurality of battery cells as claimed in claim 11, and the plurality of battery cells are stacked along a thickness direction of the battery core.

13. The battery module according to claim 12, characterized in that: The battery module comprises a first connecting tube (400) and a second connecting tube (500), wherein the first connecting tube (400) connects the liquid inlets (130) on two adjacent battery cells, and the second connecting tube (500) connects the liquid outlets (140) on two adjacent battery cells.

14. The battery module according to claim 13, characterized in that: An explosion-proof valve (210) is provided on the cover plate (200), and along the height direction of the battery cell, the first connecting pipe (400) and the second connecting pipe (500) are both arranged in a staggered manner with respect to the explosion-proof valve (210) on the cover plate (200).

15. The battery module according to claim 14, characterized in that: A flow channel (120) is arranged inside a first surface (170) of the battery housing (100); a plurality of battery cells are stacked along the thickness direction of the battery core; and a battery core is arranged between two first surfaces (170) of two adjacent battery cells.

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