Battery, battery module, and battery pack

Abstract

A battery (100) and a battery module. The battery (100) comprises: a battery body (110); and a positive terminal (120) and a negative terminal (130), wherein both the positive terminal (120) and the negative terminal (130) protrude from an end surface (111) of the battery body (110), the negative terminal (130) and the positive terminal (120) are located on the same end surface (111), a gap is formed between the negative terminal (130) and the positive terminal (120), the negative terminal (130) and the positive terminal (120) are respectively located on two sides of the battery body (110), and the height of the positive terminal (120) is higher than or lower than that of the negative terminal (130).

Description

Batteries, battery modules and battery packs

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on October 30, 2023, with application number 202322927413.1. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery, a battery module and a battery pack. Background Art

[0003] Traditional power batteries generally use multiple batteries connected in series and parallel to form a battery module, thereby achieving high-power charging and discharging of the battery module. SUMMARY OF THE INVENTION

[0004] In related technologies, the positive and negative poles of a battery are generally arranged on the two end faces of the battery body, which means that the battery connection module (CCS) of the battery module needs to be separately arranged at both ends of the battery, resulting in complicated production steps, low production efficiency and high production costs for power batteries.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0006] Battery body;

[0007] A positive electrode column is arranged on one end face of the battery body, and the positive electrode column protrudes from the end face of the battery body; and a negative electrode column is arranged on one end face of the battery body, and the negative electrode column protrudes from the end face of the battery body. The negative electrode column and the positive electrode column are located on the same end face, and there is a gap between the negative electrode column and the positive electrode column. The negative electrode column and the positive electrode column are respectively located on both sides of the axial cross-section of the battery body, and the height from the top surface of the positive electrode column to the end face of the battery body is higher or lower than the height from the top surface of the negative electrode column to the end face of the battery body.

[0008] In a second aspect, an embodiment of the present application provides a battery module, the battery module comprising:

[0009] At least two batteries according to any of the above solutions;

[0010] a first busbar electrically connected to the positive and negative electrodes of two adjacent batteries;

[0011] The control circuit board is arranged on a surface of the first bus bar away from the battery, and the control circuit board is electrically connected to the first bus bar.

[0012] In a third aspect, an embodiment of the present application provides a battery pack, which includes a box body and a plurality of battery modules arranged inside the box body, and the battery modules include the above-mentioned battery modules. Beneficial effects

[0013] The battery provided by the present application arranges the positive electrode column and the negative electrode column on the same end face of the battery body so that the busbar can be integrated at the same end of the battery, thereby improving the production efficiency of the battery module and reducing the time and labor costs of production. In addition, there is a gap between the positive electrode column and the negative electrode column, which can ensure that the positive electrode column and the negative electrode column are arranged at the same end of the battery body without contacting each other, thereby preventing the positive electrode column and the negative electrode column from being connected and causing a short circuit. By arranging the positive electrode column and the negative electrode column on both sides of the axial cross-section of the battery body with different heights of the positive electrode column and the negative electrode column, the operator can quickly distinguish between the positive electrode column and the negative electrode column, so that the operator can complete the battery connection operation without spending too much attention and operation when connecting the battery, thereby having a fool-proof effect and reducing the difficulty of connecting two adjacent batteries in series and parallel.

[0014] The battery module provided in this application is designed based on the above-mentioned battery. Its beneficial effects can be found in the beneficial effects of the above-mentioned battery, which will not be described in detail here.

[0015] The battery pack provided in this application is designed based on the above-mentioned battery module. Its beneficial effects can be found in the beneficial effects of the above-mentioned battery module, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of a battery provided in an embodiment of the present application;

[0017] FIG2 is a front view of the battery shown in FIG1 ;

[0018] FIG3 is a top view of the battery shown in FIG1 ;

[0019] FIG4 is a schematic diagram of a battery module provided in an embodiment of the present application;

[0020] FIG5 is a schematic diagram of a first busbar in the battery module shown in FIG4 ;

[0021] FIG6 is an exploded view of the battery module shown in FIG4 ;

[0022] FIG7 is a schematic diagram illustrating the assembly relationship among the battery, the first bus bar, and the control circuit board in the battery module shown in FIG4 .

[0023] Reference numerals:

[0024] 10. Battery module; 20. Battery pack;

[0025] 100, battery; 110, battery body; 111, end face; 120, positive electrode column; 130, negative electrode column;

[0026] 200, first busbar; 211, positive electrode connection portion; 212, negative electrode connection portion; 201, first first busbar; 202, second first busbar; 203, third first busbar; 204, fourth first busbar; 205, fifth first busbar; 206, sixth first busbar; 207, seventh first busbar; 208, eighth first busbar; 209, ninth first busbar; 210, series region; 220, parallel region; 221, parallel connection portion;

[0027] 300, control circuit board; 310, voltage collector;

[0028] 400, second bus;

[0029] 500, first insulating film; 501, first through hole;

[0030] 600 , second insulating film; 601 , second through hole. Modes for Carrying Out the Invention

[0031] 1 to 3 , the present application provides a battery 100, which includes a battery body 110, a positive electrode column 120, and a negative electrode column 130, wherein the positive electrode column 120 is arranged on one end surface 111 of the battery body 110, and the positive electrode column 120 protrudes from the end surface 111 of the battery body 110; the negative electrode column 130 is arranged on one end surface 111 of the battery body 110, and the negative electrode column 130 protrudes from the end surface 111 of the battery body 110; the negative electrode column 130 and the positive electrode column 120 are located on the same end surface, and there is a gap between the negative electrode column 130 and the positive electrode column 120; the negative electrode column 130 and the positive electrode column 120 are respectively located on both sides of an axial cross-section of the battery body 110; the height from the top surface of the positive electrode column 120 to the end surface 111 of the battery body 110 is higher or lower than the height from the top surface of the negative electrode column 130 to the end surface 111 of the battery body 110.

[0032] Specifically, the height from the top surface of the positive electrode post 120 to the end surface 111 of the battery body 110 is different from the height from the top surface of the negative electrode post 130 to the end surface 111 of the battery body 110. Specifically, the height from the top surface of the positive electrode post 120 to the end surface 111 of the battery body 110 is higher than the height from the top surface of the negative electrode post 130 to the end surface 111 of the battery body 110, or alternatively, the height from the top surface of the negative electrode post 130 to the end surface 111 of the battery body 110 is higher than the height from the top surface of the positive electrode post 120 to the end surface 111 of the battery body 110.

[0033] In the present application, by arranging the positive electrode column 120 and the negative electrode column 130 on the same end surface 111 of the battery body 110, and with a gap between the positive electrode column 120 and the negative electrode column 130, it is possible to ensure that the positive electrode column 120 and the negative electrode column 130 are both arranged at the same end of the battery body 110 while being separated from each other and not in contact, thereby preventing the positive electrode column 120 and the negative electrode column 130 from being connected and causing a short circuit, so that the busbar can be integrated at the same end of the battery, thereby improving the production efficiency of the power battery and reducing the time cost of production. And labor costs, and, by arranging the positive electrode column 120 and the negative electrode column 130 on both sides of the axial section of the battery body 110, the heights of the positive electrode column 120 and the negative electrode column 130 are different, so that the operator can quickly distinguish the positive electrode column 120 from the negative electrode column 130, so that the operator does not need to spend too much attention and operation to complete the connection operation of the battery 100 when connecting the battery 100, thereby playing a fool-proof effect, avoiding connection errors during production, and reducing the difficulty of connecting two adjacent batteries 100 in series and parallel.

[0034] In this embodiment, the orthographic projection of the positive electrode column 120 on the end face 111 of the battery body 110 and the orthographic projection of the negative electrode column 130 on the end face 111 of the battery body 110 are symmetrical about the midline of the end face of the battery body 110, which can ensure that the flow area of ​​the positive electrode column 120 and the negative electrode column 130 of the battery body 110 is the same.

[0035] In this embodiment, the battery body 110 is a cylinder, and the orthographic projections of the positive electrode column 120 and the negative electrode column 130 on the end surface 111 of the battery body 110 both have arc-shaped edges, the center of the arc-shaped edges is the center of the end surface 111 of the battery body 110 .

[0036] In this embodiment, the orthographic projections of the positive electrode column 120 and the negative electrode column 130 on the end surface 111 of the battery body 110 are both semicircular.

[0037] Alternatively, the orthographic projections of the positive electrode column 120 and the negative electrode column 130 on the end surface 111 of the battery body 110 are both fan-shaped.

[0038] In this embodiment, by setting the center of the edge of the positive electrode column 120 and the negative electrode column 130 to be the same as the center of the end face 111 of the battery body 110, the positive electrode column 120 and the negative electrode column 130 have a larger flow area on the limited end face 111 of the battery body 110 while ensuring non-contact, so that the battery 100 can meet the flow requirements of fast charging.

[0039] Alternatively, the battery body 110 is a rectangular parallelepiped, and the orthographic projections of the positive electrode column 120 and the negative electrode column 130 on the end faces of the battery body 110 are both quadrilaterals.

[0040] In this embodiment, the distance between the edge of the orthographic projection of the positive electrode column 120 on the end face 111 of the battery body 110 and the edge of the end face of the battery body, and the distance between the edge of the orthographic projection of the negative electrode column 130 on the end face 111 of the battery body 110 and the edge of the end face 111 of the battery body 110 are both greater than 0.1 mm, so that the positive electrode column 120 and the negative electrode column 130 are each spaced a certain distance from the edge of the battery body 110. Even if the outer side surfaces of two adjacent batteries 100 are in contact, a certain distance can be ensured between the positive electrode column 120 and the negative electrode column 130 located on the end faces of the two batteries 100, and they will not directly contact each other, thereby preventing a short circuit due to a small spacing between two adjacent batteries 100 when multiple batteries are assembled into a battery module. There is no need to set an insulating member between adjacent batteries 100, thereby improving the safety of the battery module and improving the production efficiency of the battery module.

[0041] In this embodiment, the battery body 110 includes a shell and a positive electrode material and a negative electrode material arranged inside the shell. The shell is cylindrical. The positive electrode column 120 is arranged on the top surface of the shell and is electrically connected to the positive electrode material. The negative electrode column 130 is arranged on the top surface of the shell and is electrically connected to the negative electrode material.

[0042] 4 to 7 , based on the battery 100 provided in the above embodiments of the present application, the present application further provides a battery module 10 , which includes at least two batteries 100 according to any of the above embodiments, a first bus bar 200 , and a control circuit board 300 ;

[0043] The first busbar 200 is electrically connected to the positive electrode column 120 and the negative electrode column 130 of two adjacent batteries 100. The first busbar 200 is used to connect at least two batteries 100 in series and parallel. The control circuit board 300 is arranged on a surface of the first busbar 200 away from the battery 100. The control circuit board 300 is electrically connected to the first busbar 200. The control circuit board 300 is used to control the charging and discharging of at least two batteries 100 electrically connected to the busbar.

[0044] In the present application, by adopting a battery module 10 in which the positive electrode column 120 and the negative electrode column 130 are both arranged on the same surface of the battery body 110, the first bus 200 can be integrated on the same end surface of the battery 100 and contact the positive electrode column 120 and the negative electrode column 130 to achieve electrical connection, making the production and assembly of the battery module 10 easier, improving the production efficiency of the battery module 10 and reducing the production cost of the battery module 10.

[0045] In this embodiment, the battery module 10 includes at least two battery groups 20, which are arranged along a first direction X. Each battery group 20 includes at least two batteries 100 arranged along a second direction Y, wherein the first direction X is perpendicular to the second direction Y. The batteries 100 of two adjacent battery groups 20 are staggered to achieve maximum space utilization. The busbar connects two adjacent batteries 100 in the same battery group 20 in series and connects the batteries 100 of two adjacent battery groups 20 in parallel.

[0046] In this embodiment, the battery module 10 includes four battery groups 20, and the four battery groups 20 are sequentially arranged as a first battery group, a second battery group, a third battery group and a fourth battery group in the first direction X, wherein the first battery group, the second battery group, the third battery group and the fourth battery group are each provided with ten batteries 100, wherein the ten batteries 100 of the first battery group are arranged along the second direction Y, the ten batteries 100 of the second battery group are arranged along the second direction Y, the ten batteries 100 of the third battery group are arranged along the third direction, and the ten batteries 100 of the fourth battery group are arranged along the second direction Y, and the batteries 100 of the first battery group are staggered with the batteries 100 of the second battery group, that is, the batteries 100 of the first battery group are located in the gap between two adjacent batteries 100 of the second battery group, and the batteries 100 of the second battery group are staggered. The batteries 100 of the first battery group are misaligned with the batteries 100 of the first battery group and with the batteries 100 of the third battery group, that is, the batteries 100 of the second battery group are located in the gap between two adjacent batteries 100 of the first battery group and in the gap between two adjacent batteries 100 of the third battery group, the batteries 100 of the third battery group are misaligned with the batteries 100 of the second battery group and with the batteries 100 of the fourth battery group, that is, the batteries 100 of the third battery group are located in the gap between two adjacent batteries 100 of the second battery group and in the gap between two adjacent batteries 100 of the fourth battery group, and the batteries 100 of the fourth battery group are misaligned with the batteries 100 of the third battery group, that is, the batteries 100 of the fourth battery group are located in the gap between two adjacent batteries 100 of the third battery group.

[0047] Specifically, any three adjacent batteries 100 in the battery module 10 are arranged in an isosceles triangle or an equilateral triangle to achieve maximum space utilization.

[0048] Alternatively, the number of battery packs 20 is set to three, five, six or more.

[0049] The number of batteries 100 included in each battery pack 20 may be the same or different.

[0050] In this embodiment, each battery pack 20 includes the same number of batteries 100, which is beneficial for the second bus 400 to aggregate and output current.

[0051] In this embodiment, the distance between two adjacent batteries 100 is greater than or equal to 1 mm and less than or equal to 4 mm.

[0052] Specifically, the distance between two adjacent batteries 100 is 1 mm, 2 mm, 3 mm or 4 mm.

[0053] Within the above range, heat dissipation of the batteries 100 in the battery module 10 is facilitated, and the space area occupied by the battery module 10 is minimized.

[0054] Specifically, the first busbar 200 is arranged on two adjacent batteries 100 arranged along the first direction X. The first busbar 200 is electrically connected to one of the positive electrode column 120 and the negative electrode column 130 of the previous battery 100 in the first direction X, and is electrically connected to the other of the positive electrode column 120 and the negative electrode column 130 of the next battery 100 in the first direction X, thereby realizing the series connection of the previous battery 100 and the next battery 100.

[0055] In this embodiment, the battery module 10 includes at least two first busbars 200 , and one first busbar 200 is electrically connected to one of the positive electrode column 120 and the negative electrode column 130 of the batteries 100 in the same arrangement order in each battery pack 20 .

[0056] Specifically, the battery module 10 includes nine first busbars 200, which are arranged along the second direction Y. The nine first busbars 200 are sequentially arranged in the second direction Y as a first first busbar 201, a second first busbar 202, a third first busbar 203, a fourth first busbar 204, a fifth first busbar 205, a sixth first busbar 206, a seventh first busbar 207, an eighth first busbar 208, and a ninth first busbar 209.

[0057] The first first busbar 201 is electrically connected to the positive electrode post 120 of the first battery 100 of the first battery group and the negative electrode post 130 of the second battery 100, and is electrically connected to the positive electrode post 120 of the first battery 100 of the second battery group and the negative electrode post 130 of the second battery 100, and is electrically connected to the positive electrode post 120 of the first battery 100 of the third battery group and the negative electrode post 130 of the second battery 100, and is electrically connected to the positive electrode post 120 of the first battery 100 of the fourth battery group and the negative electrode post 130 of the second battery 100;

[0058] The second first bus bar 202 is electrically connected to the positive electrode post 120 of the second battery 100 of the first battery group and the negative electrode post 130 of the third battery 100, and is also electrically connected to the positive electrode post 120 of the second battery 100 of the second battery group and the negative electrode post 130 of the third battery 100, and is also electrically connected to the positive electrode post 120 of the second battery 100 of the third battery group and the negative electrode post 130 of the third battery 100, and is also electrically connected to the positive electrode post 120 of the second battery 100 of the fourth battery group and the negative electrode post 130 of the third battery 100. 0, the third first busbar 203, the fourth first busbar 204, the fifth first busbar 205, the sixth first busbar 206, the seventh first busbar 207, the eighth first busbar 208, and the ninth first busbar 209 are respectively electrically connected to the third battery 100, the fourth battery 100, the fifth battery 100, the sixth battery 100, the seventh battery 100, the eighth battery 100, the ninth battery 100 and the tenth battery 100 in sequence according to the above connection method, thereby realizing four battery groups in series and parallel.

[0059] In this embodiment, the battery module 10 also includes a second bus 400, which is electrically connected to one of the positive electrode column 120 or the negative electrode column 130 of the first battery 100 arranged along the second direction Y in the battery pack 20, and is electrically connected to the other of the positive electrode column 120 or the negative electrode column 130 of the last battery 100 arranged along the second direction Y in the battery pack 20.

[0060] In this embodiment, the batteries 100 are connected in series and parallel via the first busbar 200 , and then are combined via the second busbar 400 to output current.

[0061] Specifically, the second bus 400 includes a positive bus and a negative bus, the positive bus is electrically connected to the positive electrode column 120 of one of the first battery 100 or the last battery 100 arranged along the second direction Y in the battery pack 20, and the negative bus is electrically connected to the negative electrode column 130 of the other of the first battery 100 or the last battery 100 arranged along the second direction Y in the battery pack 20.

[0062] In this embodiment, the second bus 400 is used to modularly output the battery pack 20 connected in series and parallel, and no additional wires are required for output, which avoids short circuits caused by the internal wiring of the battery module 10 and reduces the integrity of the battery module 10. The second bus 400 and the first bus 200 are both arranged on the same end of the battery 100, which simplifies the assembly process of the battery module 10 and improves the production efficiency of the battery module 10.

[0063] In this embodiment, the control circuit board 300 is connected to a voltage collector 310, which is electrically connected to the first bus 200. The voltage collector 310 obtains voltage information of the battery 100 through the first bus 200 and feeds the voltage information back to the control circuit board 300, which controls the charging and discharging of the battery 100.

[0064] In this embodiment, the first busbar 200 includes a series region 210 and a parallel region 220, the parallel region 220 is located between two adjacent series regions 210, the first busbar 200 includes a parallel connection portion 221 in the parallel region 220, the first busbar 200 includes a positive connection portion 211 and a negative connection portion 212 in the series region 210, the positive connection portion 211 and the negative connection portion 212 located in the two adjacent series regions 210 are connected through the parallel connection portion 221, the positive connection portion 211 is electrically connected to the positive electrode column 120, and the negative connection portion 212 is electrically connected to the negative electrode column 130.

[0065] Specifically, the series region 210 of the first busbar 200 is used to connect two adjacent batteries in the same battery pack 20 in series, and the parallel region 220 is used to connect two adjacent series regions 210 in parallel.

[0066] In this embodiment, the first busbar 200 includes a plurality of series-connected regions 210 , wherein a line connecting the centers of the negative electrode connection portions 212 of two adjacent series-connected regions 210 forms an obtuse angle or an acute angle with the first direction X, and a line connecting the centers of the positive electrode connection portions 211 of two adjacent series-connected regions forms an obtuse angle or an acute angle with the first direction X.

[0067] Specifically, the parallel connection portion 221 is an oblique rib, and an angle is formed between the parallel connection portion 221 and the negative electrode connection portion 212 or the positive electrode connection portion 211 , and the angle is greater than 90° or less than 90°.

[0068] Specifically, the multiple series-connected regions 210 of the same first busbar 200 are staggered, and the first busbar can connect the batteries of different staggered battery packs 20 in series and in parallel.

[0069] In this embodiment, the positive electrode connection portion 211 completely covers the top surface of the positive electrode column of the battery 100 , and the negative electrode connection portion 212 completely covers the top surface of the negative electrode column of the battery 100 , thereby increasing the flow area of ​​the battery 100 .

[0070] In this embodiment, the battery module 10 also includes a first insulating film 500 and a second insulating film 600. The first insulating film 500 is arranged between the first bus 200 and the battery 100. The first insulating film 500 is provided with a first through hole 501. The first insulating film 500 exposes the bottom surface of the positive electrode connection part 211 and the negative electrode connection part 212 through the first through hole 501. The second insulating film 600 is provided with a second through hole 601. The second insulating film 600 exposes the top surface of the positive electrode connection part 211 and the negative electrode connection part 212 through the second through hole 601.

[0071] Specifically, the first busbar 200 is welded to the positive electrode post of the battery 100 via the positive electrode connector 211, and the first busbar 200 is welded to the negative electrode post of the battery 100 via the negative electrode connector 212. The first insulating film 500 is used to insulate the non-welded area of ​​the first busbar 200 from the non-welded area of ​​the battery 100. The first insulating film 500 and the second insulating film 600 fix the first busbar 200 and the control circuit board 300 between the first insulating film 500 and the second insulating film 600, so that the first insulating film 500, the second insulating film 600, the first busbar 200 and the control circuit board 300 form a whole. The positive electrode connector 211 and the negative electrode connector 212 are exposed through the first through hole 501 of the first insulating film 500 and the second through hole 601 of the second insulating film 600. The other areas of the positive electrode connector 211 and the negative electrode connector 212 of the first busbar 200 are covered by the first insulating film 500 and the second insulating film 600.

[0072] In this embodiment, the second through hole 601 is a laser welding window for exposing the top surfaces of the positive electrode connection portion 211 and the negative electrode connection portion 212, so that the laser can be irradiated onto the positive electrode connection portion 211 and the negative electrode connection portion 212 to weld the bottom surface of the positive electrode connection portion 211 to the positive electrode column and weld the bottom surface of the negative electrode connection portion 212 to the negative electrode column.

[0073] The present application also provides a battery pack, which includes a housing and a plurality of battery modules disposed within the housing. The battery modules are configured as the battery modules provided in the above embodiments. The battery pack can be a power battery pack or an energy storage battery pack.

Claims

1. A battery (100), comprising: Battery body (110); A positive electrode column (120) is arranged on an end surface (111) of the battery body (110), and the positive electrode column (120) protrudes from the end surface (111) of the battery body (110); and A negative electrode column (130) is arranged on an end surface (111) of the battery body (110), the negative electrode column (130) protrudes from the end surface (111) of the battery body (110), the negative electrode column (130) and the positive electrode column (120) are located on the same end surface (111), a gap is provided between the negative electrode column (130) and the positive electrode column (120), the negative electrode column (130) and the positive electrode column (120) are respectively located on both sides of an axial section of the battery body (110), and the height from the top surface of the positive electrode column (120) to the end surface (111) of the battery body (110) is higher or lower than the height from the top surface of the negative electrode column (130) to the end surface (111) of the battery body (110).

2. The battery (100) according to claim 1, wherein: The orthographic projection of the positive electrode column (120) on the end surface (111) of the battery body (110) and the orthographic projection of the negative electrode column (130) on the end surface (111) of the battery body (110) are symmetrical about the midline of the end surface of the battery body (110).

3. The battery (100) according to claim 1 or 2, wherein: The battery body (110) is a cylinder, and the orthographic projections of the positive electrode column (120) and the negative electrode column (130) on the end surface (111) of the battery body (110) both have arc-shaped edges, and the center of the arc-shaped edges is the center of the end surface (111) of the battery body (110).

4. The battery (100) according to claim 1 or 2, wherein: The battery body (110) is a rectangular parallelepiped, and the orthographic projections of the positive electrode column (120) and the negative electrode column (130) on the end surface (111) of the battery body (110) are both quadrilaterals.

5. The battery (100) according to claim 1 or 2, wherein: The distance between the edge of the orthographic projection of the positive electrode column (120) on the end surface (111) of the battery body (110) and the edge of the end surface (111) of the battery body (110) is greater than 0.1 mm; and / or the distance between the edge of the orthographic projection of the negative electrode column (130) on the end surface (111) of the battery body (110) and the edge of the end surface (111) of the battery body (110) is greater than 0.1 mm.

6. A battery module (10), comprising: At least two batteries (100) according to any one of claims 1 to 5; A first busbar (200) electrically connected to the positive electrode posts (120) and the negative electrode posts (130) of two adjacent batteries (100); A control circuit board (300) is arranged on a surface of the first bus bar (200) away from the battery (100), and the control circuit board (300) is electrically connected to the first bus bar (200).

7. The battery module (10) according to claim 6, wherein: The battery module (10) comprises at least two battery groups (20), wherein at least two of the battery groups (20) are arranged along a first direction, and each of the battery groups (20) comprises at least two batteries (100) arranged along a second direction, wherein the first direction is perpendicular to the second direction, and the first bus bar (200) is connected in series to two adjacent batteries (100) located in the same battery group (20), and the first bus bar (200) is connected in parallel to the batteries (100) of two adjacent battery groups (20).

8. The battery module (10) according to claim 7, wherein: The batteries (100) of two adjacent battery packs (20) are misaligned.

9. The battery module (10) according to claim 7, wherein: Any three adjacent batteries (100) in the battery module (10) are arranged in an isosceles triangle or an equilateral triangle.

10. The battery module (10) according to claim 7, wherein: The battery module (10) further comprises a second bus bar (400), wherein the second bus bar (400) is electrically connected to one of the positive electrode column (120) or the negative electrode column (130) of the first battery (100) arranged along the second direction in the battery pack (20), and is electrically connected to the other of the positive electrode column (120) or the negative electrode column (130) of the last battery (100) arranged along the second direction in the battery pack (20).

11. The battery module (10) according to claim 10, wherein: The second busbar (400) and the first busbar (200) are both arranged on the same end of the battery (100).

12. The battery module (10) according to claim 7, wherein: The distance between two adjacent batteries (100) is greater than or equal to 1 mm and less than or equal to 4 mm.

13. The battery module (10) according to any one of claims 6 to 12, wherein: The first busbar (200) comprises a series region (210) and a parallel region (220), wherein the parallel region (220) is located between two adjacent series regions (210), the first busbar (200) comprises a parallel connection portion (221) in the parallel region (220), the first busbar (200) comprises a positive electrode connection portion (211) and a negative electrode connection portion (212) in the series region (210), the positive electrode connection portion (211) and the negative electrode connection portion (212) located in two adjacent series regions (210) are connected via the parallel connection portion (221), the positive electrode connection portion (211) is electrically connected to the positive electrode column (120), and the negative electrode connection portion (212) is electrically connected to the negative electrode column (130).

14. The battery module (10) according to claim 13, wherein: The same first busbar (200) comprises a plurality of the series connection areas (210), and the plurality of the series connection areas (210) are arranged in a staggered manner.

15. The battery module according to claim 13, wherein: The battery module (10) further comprises a first insulating film (500) and a second insulating film (600), wherein the first insulating film (500) is arranged between the first busbar (200) and the battery (100), the first insulating film (500) is provided with a first through hole (501), and the first insulating film (500) exposes the bottom surfaces of the positive electrode connecting part (211) and the negative electrode connecting part (212) through the first through hole (501), and the second insulating film (600) is provided with a second through hole (601), and the second insulating film (600) exposes the top surfaces of the positive electrode connecting part (211) and the negative electrode connecting part (212) through the second through hole (601). 16 . A battery pack, comprising a box body and a plurality of battery modules arranged inside the box body, wherein the battery modules comprise the battery modules according to any one of claims 6 to 15.

Images