Battery and battery module

Abstract

A battery (100) and a battery module (200). The battery (100) comprises a battery cell (110) and an insulation sheet (120), wherein the battery cell (110) has a top surface (1101) and a bottom surface (1102) opposite each other, and the top surface (1101) is provided with at least one terminal (111); and the insulation sheet (120) is arranged on the side of the top surface (1101) away from the bottom surface (1102), the insulation sheet (120) is provided with a connection region (121), the connection region (121) is exposed from the top surface (1101), and a press strip (20) is connected to the battery cell (110) by means of the connection region (121).

Description

Batteries and battery modules

[0001] This application claims priority to Chinese Patent Application No. 202421690509.9, filed on July 16, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to a battery and a battery module. Background Technology

[0003] In the manufacturing process of battery modules, it is usually necessary to add a pressure strip structure to suppress the expansion force of the battery cell and reduce the shear force on the adhesive at the bottom of the battery cell, thereby improving the displacement of the battery module in the horizontal and vertical directions. When the pressure strip is directly connected to the top insulating sheet of the battery cell, the connection method between the pressure strip and the battery cell is: pressure strip - structural adhesive - top insulating sheet - top insulating sheet adhesive - top cover. Invention Overview

[0004] However, the top insulating film and other film layers between the pressure strip and the battery cell are prone to bulging or detachment from the battery cell during the expansion process, which affects the force exerted by the pressure strip on the battery cell and causes the pressure strip to fail to suppress the expansion force of the battery cell.

[0005] In a first aspect, embodiments of this application provide a battery, comprising:

[0006] The battery cell has a top surface and a bottom surface, with at least one terminal post disposed on the top surface;

[0007] An insulating sheet is placed on the top surface away from the bottom surface. The insulating sheet has a connection area that is exposed on the top surface. The pressure strip is connected to the battery cell through the connection area.

[0008] Secondly, embodiments of this application provide a battery module, including:

[0009] A battery pack includes at least one sub-battery pack, the sub-battery pack including a plurality of batteries in a first aspect, the plurality of batteries being arranged along a second direction;

[0010] At least one pressure strip extends along a second direction and is connected to the sub-battery pack;

[0011] The pressure strip is located on the top surface away from the bottom surface and is connected to the battery cell through the connection area. Beneficial effects

[0012] This application provides a battery and a battery module. An insulating sheet is provided on the top surface of the battery, and the insulating sheet has a connection area that exposes the top surface of the battery cell. A pressure strip is connected to the top surface of the battery cell through the connection area. In this application, because the insulating sheet has a connection area that avoids the pressure strip, the pressure strip is directly connected and fixed to the battery cell through the connection area. During the expansion of the battery cell, the pressure strip remains pressed against the top surface of the battery cell, preventing problems such as the pressure strip detaching from or shifting from the battery cell. Therefore, in this application, the pressure strip can more effectively suppress the expansion force of the battery cell and reduce the shear force on the adhesive at the bottom of the battery cell, improving the horizontal and vertical displacement of the battery module. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the exploded structure of a battery provided in an embodiment of this application;

[0014] Figure 2 is a schematic diagram of the structure of a battery provided in an embodiment of this application;

[0015] Figure 3 is a top view of one type of battery provided in an embodiment of this application;

[0016] Figure 4 is a top view of one type of battery provided in an embodiment of this application;

[0017] Figure 5 is a top view of one type of battery provided in an embodiment of this application;

[0018] Figure 6 is a top view of one type of battery provided in an embodiment of this application;

[0019] Figure 7 is a top view of one type of battery provided in an embodiment of this application;

[0020] Figure 8 is a top view of one of the battery modules provided in the embodiments of this application;

[0021] Figure 9 is a top view of one of the battery modules provided in the embodiments of this application;

[0022] Figure 10 is a top view of one of the battery modules provided in the embodiments of this application;

[0023] Figure 11 is a top view of one of the battery modules provided in the embodiments of this application;

[0024] Figure 12 is a top view of one of the battery modules provided in the embodiments of this application;

[0025] Figure 13 is a top view of one of the battery modules provided in the embodiments of this application.

[0026] Explanation of reference numerals in the attached diagram: 10-Battery pack, 100-Battery, 101-Sub-battery pack, 110-Cell, 1101-Top surface, 1102-Bottom surface, 111-Terminal, 1111-First terminal, 1112-Second terminal, 112-Explosion-proof valve, 113-QR code, 120-Insulating sheet, 1200-Sub-insulating sheet, 1201-First sub-insulating sheet, 1202-Second sub-insulating sheet, 1203-Third sub-insulating sheet, 121-Connection area, 1211-First connection area, 1212-Second connection area. 122-Terminal hole, 1221-First terminal hole, 1222-Second terminal hole, 123-Explosion-proof valve hole, 124-QR code hole, 125-Detection hole, 130-Outer protective film, 20-Pressure strip, 200-Battery module, 210-First pressure strip, 220-Second pressure strip. Embodiments of the present invention

[0027] Please refer to Figures 1-2, which illustrate a battery 100 provided in this application. The battery 100 includes a cell 110 and an insulating sheet 120. The cell 110 has a top surface 1101 and a bottom surface 1102 facing each other. The top surface 1101 is provided with at least one terminal post 111. The insulating sheet 120 is disposed on the side of the top surface 1101 away from the bottom surface 1102. The insulating sheet 120 is provided with a connection area 121, which is exposed above the top surface 1101. A pressure strip 20 is connected to the cell 110 through the connection area 121.

[0028] In traditional battery modules, the pressure strip 20 is usually directly set on the insulating sheet 120 and not directly connected to the cell 110. During the expansion of the cell 110, the change in the volume of the cell 110 will cause the insulating sheet 120 to deform, such as bulging. At this time, the insulating sheet 120 and the cell 110 are easy to separate. As a result, the pressure strip 20 connected to the surface of the insulating sheet 120 cannot be tightly pressed onto the cell 110, which affects the fixing effect of the pressure strip 20 on the cell 110. After the cell 110 loses the force of the pressure strip 20, the cell 110 will be vertically displaced upward under the action of expansion force. At the same time, the cell 110 will be horizontally displaced under the shear force of the glue at the bottom of the cell, which will affect the performance of the battery module.

[0029] This application provides a connection area 121 on the insulating sheet 120, exposing the top surface 1101 of the battery cell 110. This allows the pressure strip 20 to be directly connected and fixed to the battery cell 110 at the connection area 121. During the expansion of the battery cell 110, the pressure strip 20 remains pressed against the top surface 1101 of the battery cell 110, preventing issues such as the pressure strip 20 detaching from or shifting from the battery cell 110. In a battery module, multiple battery cells 110 are typically included, with the pressure strip 20 pressed against the top surfaces of these cells. In this application, the pressure strip 20 remains fixed to the battery cells 110, securing multiple cells 110 together to form a single unit. It also exerts vertical pressure on the battery cells 110. During the expansion of the battery cell 110, both vertical and horizontal expansion forces are generated. At this time, the pressure strip 20 exerts both vertical and horizontal restraining forces on the battery cell 110. In the vertical direction, the compression of adjacent cells 110 causes vertical displacement of the cells. The pressure strip 20 fixes multiple cells 110 into a whole, which can suppress the vertical upward displacement of the cells 110 caused by cell expansion. In the horizontal direction, adjacent cells 110 are always connected and fixed to the pressure strip 20. Therefore, the cells 110 will not be displaced horizontally due to the expansion force of the cells and the shear force of the adhesive at the bottom of the cells. Therefore, the battery 100 of this application can more effectively suppress the expansion force of the cells 110 and reduce the shear force on the adhesive at the bottom of the cells 110, thereby improving the displacement of the battery module in both the horizontal and vertical directions.

[0030] In some embodiments, referring to Figures 3-7, the insulating sheet 120 has two opposite ends in a first direction X. The connection region 121 may be located between at least one end of the insulating sheet 120 in the first direction and / or between the opposite ends of the insulating sheet 120 in the first direction. The insulating sheet 120 may include one or more connection regions 121, which is not limited herein. The first direction is the extending direction of the insulating sheet 120. For example, the battery cell may be a square battery cell, and the insulating sheet 120 may be rectangular. The first direction may be the extending direction of the longer side of the rectangle, but is not limited thereto.

[0031] Taking the insulating sheet 120 as an example, which includes two connecting regions 121, please refer to Figures 3-4. The two connecting regions 121 can be located at opposite ends of the insulating sheet 120 in the first direction. Please refer to Figures 5-6. The two connecting regions 121 can both be located between opposite ends of the insulating sheet 120 in the first direction. Please refer to Figure 7. One of the two connecting regions 121 can be located at one end of the insulating sheet 120 in the first direction, and the other can be located between opposite ends of the insulating sheet 120 in the first direction.

[0032] In some embodiments, referring to Figures 3-4, when the connection area 121 is located at at least one end of the insulating sheet 120 in a first direction, the connection area 121 is a notch provided at the end of the insulating sheet 120.

[0033] Referring to Figure 3, when the connection area 121 is located at the end of the insulating sheet 120, a notch can be provided at the end, exposing the top surface 1101, so that the pressure strip 20 contacts and connects with the battery cell 110 at the notch. The shape of the notch can be U-shaped, that is, the edge of the end of the insulating sheet 120 is at least partially concave towards the center of the insulating sheet 120. The notch can also be other shapes, which are not limited here.

[0034] Referring to Figures 2 and 4, when the connection area 121 is located at the end of the insulating sheet 120 in the first direction, the connection area 121 can also be formed by the overall inward reduction of the edge of the end of the insulating sheet 120. That is, the length of the insulating sheet 120 in the first direction is less than the length of the top surface 1101 in the first direction, and the opposite ends of the insulating sheet 120 in the first direction are respectively exposed at the opposite ends of the top surface 1101 in the first direction. As shown in Figure 4, in the first direction, the distance a from the edge of the insulating sheet 120 to the center line C of the top surface 1101 is less than the distance b from the edge of the top surface 1101 on the same side to the center line C. The area AA between the edge of the insulating sheet 120 and the edge of the top surface 1101 on the top surface 1101 is regarded as the connection area 121, wherein the center line C is perpendicular to the first direction, and the top surface 1101 is symmetrical about the center line C.

[0035] In some embodiments, referring to FIG5, when the connecting area 121 is located between opposite ends of the insulating sheet 120 in a first direction, the connecting area 121 is a through hole provided on the insulating sheet 120. The through hole penetrates the insulating sheet 120 in a direction perpendicular to the top surface 1101, and the pressure strip 20 is connected to the exposed top surface 1101 inside the through hole. The through hole can be regular or irregular in shape, such as rectangular, circular, etc., but is not limited thereto.

[0036] In some embodiments, referring to FIG6, when the connection region 121 is located between opposite ends of the insulating sheet 120 in a first direction, the connection region 121 extends along the second direction Y and divides the insulating sheet 120 into a plurality of sub-insulating sheets (1200) spaced apart along the first direction, the second direction being perpendicular to the first direction.

[0037] Specifically, referring to Figure 6, the insulating sheet 120 includes two connection areas 121, both located between opposite ends of the insulating sheet 120 in the first direction. The length of the insulating sheet 120 in the first direction can be equal to the length of the top surface 1101 in the first direction. The two connection areas 121 divide the insulating sheet 120 into three sub-insulating sheets: a first sub-insulating sheet 1201, a second sub-insulating sheet 1202, and a third sub-insulating sheet 1203 arranged at intervals along the first direction. The area between the first sub-insulating sheet 1201 and the second sub-insulating sheet 1202 that exposes the top surface 1101 is the first connection area 1211, and the area between the second sub-insulating sheet 1202 and the third sub-insulating sheet 1203 that exposes the top surface 1101 is the second connection area 1212. In this embodiment, when attaching the insulating sheet 120 to the top surface 1101, it can be attached in three sections, that is, the first sub-insulating sheet 1201, the second sub-insulating sheet 1202 and the third sub-insulating sheet 1203 are attached to the corresponding areas of the top surface 1101 in sequence. At the same time, a first connection area 1211 is reserved between the first sub-insulating sheet 1201 and the second sub-insulating sheet 1202, and a second connection area 1212 is reserved between the second sub-insulating sheet 1202 and the third sub-insulating sheet 1203.

[0038] In this application, referring to Figure 1, the top surface 1101 of the battery 100 may be provided with one or more terminals 111, which is not limited here. The top surface 1101 of the battery 100 is also provided with an explosion-proof valve 112, a QR code 113, etc. The positions of the terminals 111, explosion-proof valve 112, and QR code 113 on the top surface 1101 are not limited, but they do not overlap with the connection area 121. Correspondingly, the insulating sheet 120 is provided with terminal hole 122, explosion-proof valve hole 123, QR code hole 124, etc.

[0039] In some embodiments, please refer to FIG1. ​​The top surface 1101 is provided with a first pole post 1111 and a second pole post 1112, and an explosion-proof valve 112 located between the first pole post 1111 and the second pole post 1112. The insulating sheet 120 is provided with a first pole post hole 1221 corresponding to the first pole post 1111 and a second pole post hole 1222 corresponding to the second pole post 1112, and an explosion-proof valve hole 123 corresponding to the explosion-proof valve 112.

[0040] Please refer to Figure 5. When the connection area 121 is located between the two opposite ends of the insulating sheet 120 in the first direction, the connection area 121 is located between the first pole hole 1221 and the explosion-proof valve hole 123 and / or the second pole hole 1222 and the explosion-proof valve hole 123.

[0041] In this embodiment, the explosion-proof valve 112 can be located at the center of the top surface 1101 to facilitate uniform explosion-proof pressure relief. The first pole 1111 and the second pole 1112 can be symmetrically arranged about the explosion-proof valve 112. When the connection area 121 is located between the first pole hole 1221 or the second pole hole 1222 and the explosion-proof valve hole 123, the pressure strip 20 is installed between the first pole 1111 and the second pole 1112. Since the expansion force is greatest at the center of the battery cell 110, the closer the pressure strip 20 is to the center, the better its effect in suppressing the expansion force of the battery cell.

[0042] In some embodiments, referring to Figure 4, the length of the battery cell 110 in the first direction is L, and the length of the connecting area 121 in the first direction is M, where M ranges from (L / 30-5) mm ≤ M ≤ (L / 30+5) mm. The length M of the connecting area 121 in the first direction corresponds to the width of the pressure strip 20 in the first direction. If the value of M is too small, the width of the pressure strip 20 is too narrow, which cannot suppress the expansion force of the battery cell 110. If the value of M is too large, the width of the pressure strip 20 is too large, which occupies a large space and increases cost and weight.

[0043] In some embodiments, when the length L of the battery cell 110 is greater than or equal to 300 mm, the length M of the connection area 121 is greater than or equal to 10 mm; when the length L of the battery cell 110 is less than or equal to 300 mm, the length M of the connection area 121 is less than or equal to 10 mm.

[0044] In some embodiments, referring to FIG1, the insulating sheet 120 is also provided with a detection hole 125, and the connection area 121 does not overlap with the detection hole 125. For example, the detection hole 125 can be a temperature / pressure sensor (NTC) hole, providing space for thermistors, probes, etc., so as to monitor the temperature of the cell 110 in real time and ensure the safety of the cell 110.

[0045] The detection hole 125 can be set close to the explosion-proof valve 112. For example, the distance between the detection hole 125 and the explosion-proof valve hole 123 can be 2 mm-4 mm. If the distance between the detection hole 125 and the explosion-proof valve hole 123 is too close, the connection between the detection hole 125 and the explosion-proof valve hole 123 on the insulating sheet 120 may be easily pulled off. If the distance between the detection hole 125 and the explosion-proof valve hole 123 is too far, it will increase the line length of the NTC and reduce the space utilization.

[0046] In some embodiments, referring to FIG1, the battery 100 further includes an outer protective film 130, which may be a polymer film, such as a blue film. Specifically, the cell 110 also includes a side surface located between the top surface 1101 and the bottom surface 1102, and the outer protective film 130 covers the bottom surface 1102 and the side surface to protect the cell 110.

[0047] Please refer to Figures 8-13. This application also provides a battery module 200, which includes a battery pack 10 and at least one retaining strip 20. The battery pack 10 includes at least one sub-battery pack 101, which includes a plurality of batteries 100 as described above. The plurality of batteries 100 are arranged along a second direction, and the plurality of batteries 100 may be two or more batteries 100. The retaining strip 20 extends along the second direction and is connected to the sub-battery pack 101. The retaining strip 20 is disposed on the side of the top surface 1101 away from the bottom surface 1102 and is connected to the battery cell 110 through a connection area 121.

[0048] In this application, the multiple batteries 100 in the sub-battery pack 101 have identical structures, so that the connection areas 121 on the multiple batteries 100 can be arranged and extended in the same direction, so that the pressure strip 20 can be aligned and connected with the connection area 121 on each battery 100 in the sub-battery pack 101. The bottom of the multiple batteries 100 in the sub-battery pack 101 is fixed to the fastener with glue, so that the multiple batteries 100 are fixed together.

[0049] In the sub-battery pack 101, multiple batteries 100 are arranged along a second direction, that is, the connection areas 121 on the multiple batteries 100 are arranged along the second direction. The pressure strip 20 extends along the second direction in the same direction as the arrangement of the connection areas 121. The pressure strip 20 covers the connection areas 121 arranged along the second direction and is connected to the corresponding cell 110 through the connection area 121 on each battery 100, so as to realize the fixed connection between the pressure strip 20 and each cell 110 in the sub-battery pack 101. The multiple batteries 100 in the sub-battery pack 101 are connected into a whole by the pressure strip 20. Since the positions of the cell 110 and the pressure strip 20 are relatively fixed, during the expansion of the cell 110, the pressure strip 20 can suppress the expansion force of the cell 110 and reduce the shear force on the glue at the bottom of the cell 110, thereby improving the displacement of the battery module 200 in the horizontal and vertical directions.

[0050] The pressure strip 20 and the battery cell 110 can be connected by adhesive, for example, by structural adhesive, but not limited to this.

[0051] In some embodiments, as shown in Figures 8-10, the pressure strip 20 is located between at least one end of the sub-battery pack 101 in a first direction and / or between the opposite ends of the sub-battery pack 101 in the first direction.

[0052] Specifically, taking a sub-battery pack 101 with two pressure strips 20 as an example, the two pressure strips 20 are parallel and both extend along the second direction. Each battery 100 in the corresponding sub-battery pack 101 includes two connection areas 121. Referring to Figure 8, the two pressure strips 20 can be located at opposite ends of the sub-battery pack 101 in the first direction, in which case the two connection areas 121 of the battery 100 are located at opposite ends of the insulating sheet 120 in the first direction. Referring to Figure 9, the two pressure strips 20 can both be located between opposite ends of the sub-battery pack 101 in the first direction, in which case the two connection areas 121 of the battery 100 are both located between opposite ends of the insulating sheet 120 in the first direction. Referring to Figure 10, one of the two pressure strips 20 can be located at one end of the sub-battery pack 101 in the first direction, and the other can be located between opposite ends of the sub-battery pack 101 in the first direction. In this case, one of the two connection areas 121 of the battery 100 is located at one end of the insulating sheet 120 in the first direction, and the other is located between opposite ends of the insulating sheet 120 in the first direction. The position of the connection area 121 corresponds to the position of the insulating sheet 120.

[0053] In some embodiments, referring to FIG9, when the pressure bar 20 is located between the opposite ends of the sub-battery pack 101 in a first direction, the pressure bar 20 is located between the first terminal post 1111 and the explosion-proof valve 112 and / or the second terminal post 1112 and the explosion-proof valve 112.

[0054] In some embodiments, referring to Figures 11-13, when the battery pack 10 includes a plurality of sub-battery packs 101, the plurality of sub-battery packs 101 are arranged along a first direction. The battery module 200 includes a first pressure strip 210 and a second pressure strip 220. The first pressure strip 210 is located between opposite ends of the sub-battery packs 101 in the first direction or at least one end of the battery pack 10 in the first direction. The second pressure strip 220 is located between two adjacent sub-battery packs 101 and is connected to the two adjacent sub-battery packs 101.

[0055] Please refer to Figures 11-12. When the connection area 121 of the battery 100 is located at the end of the insulating sheet 120 in the first direction, and the connection areas 121 of two adjacent sub-battery groups 101 are adjacent, the two adjacent sub-battery groups 101 can share a second pressure strip 220, and the second pressure strip 220 is simultaneously connected to the two adjacent sub-battery groups 101. At this time, the second pressure strip 220 can simultaneously suppress the cell expansion force of the two adjacent sub-battery groups 101.

[0056] In some embodiments, the length of the second pressure strip 220 in the first direction is twice the length of the first pressure strip 210 in the first direction, so as to simultaneously satisfy the expansion force suppression effect on two adjacent sub-battery packs 101.

[0057] Specifically, please refer to Figure 11. The battery module 200 includes a first pressure strip 210 and a second pressure strip 220. The first pressure strip 210 is located at both ends of the battery pack 10 in a first direction, and the second pressure strip 220 is located between two adjacent sub-battery packs 101, that is, two adjacent sub-battery packs 101 share one second pressure strip 220. In this embodiment, the space at both ends of the battery cell 110 is fully utilized, and a thickened second pressure strip 220 is provided between two adjacent sub-battery packs 101, which can simultaneously control the expansion degree of the battery cells on the left and right sides, and is more aesthetically pleasing.

[0058] Referring to Figure 12, the battery module 200 includes a first pressure strip 210 and a second pressure strip 220. The first pressure strip 210 is located between opposite ends of the sub-battery pack 101 in a first direction, for example, between the terminal post 111 and the explosion-proof valve 112. The second pressure strip 220 is located between two adjacent sub-battery packs 101, meaning that two adjacent sub-battery packs 101 share one second pressure strip 220. In this embodiment, the first pressure strip 210 is located near the center of the battery 100, which can more effectively suppress expansion force. At the same time, a thickened second pressure strip 220 is provided between two adjacent sub-battery packs 101, which can simultaneously control the expansion degree on the left and right sides.

[0059] Referring to Figure 13, the battery module 200 may also include only multiple first pressure strips 210 without the second pressure strips 220. All the first pressure strips 210 are located between opposite ends of the sub-battery pack 101 in the first direction. In this embodiment, the first pressure strips 210 are all positioned close to the center of the battery 100, thus more effectively suppressing expansion force. However, compared to the embodiment in Figure 12, the space utilization is not high, and it cannot simultaneously suppress the expansion force of adjacent sub-battery packs 101.

[0060] In this application, the material of the pressure strip can be metal, such as aluminum or steel, but is not limited to this.

Claims

1. A battery, comprising: a cell (110) having opposite top and bottom surfaces (1101, 1102), the top surface (1101) being provided with at least one pole post (111); an insulating sheet (120) provided on a side of the top surface (1101) away from the bottom surface (1102), the insulating sheet (120) being provided with a connecting region (121) that exposes the top surface (1101) and through which a compression strip (20) is connected to the cell (110).

2. The battery of claim 1, wherein, The insulating sheet (120) has opposite ends in a first direction, and the connecting region (121) is located between at least one end of the insulating sheet (120) in the first direction and / or between the opposite ends of the insulating sheet (120) in the first direction, the first direction being the direction of extension of the insulating sheet (120).

3. The battery of claim 2, wherein, When the connecting region (121) is located at at least one end of the insulating sheet (120) in the first direction, the connecting region (121) is a notch provided at the end of the insulating sheet (120).

4. The battery of claim 2, wherein, When the connecting region (121) is located between the opposite ends of the insulating sheet (120) in the first direction, the connecting region (121) is a through hole provided on the insulating sheet (120), the through hole penetrating the insulating sheet (120) in a direction perpendicular to the top surface (1101).

5. The battery of claim 2, wherein, When the connecting region (121) is located between the opposite ends of the insulating sheet (120) in the first direction, the connecting region (121) extends in a second direction and divides the insulating sheet (120) into a plurality of sub-insulating sheets (1200) arranged at intervals in the first direction, the second direction being perpendicular to the first direction.

6. The battery of claim 2, wherein, The top surface (1101) is provided with a first pole post (1111) and a second pole post (1112), and an explosion-proof valve (112) located between the first pole post (1111) and the second pole post (1112), and the insulating sheet (120) is provided with a first pole post hole (1221) corresponding to the first pole post (1111), a second pole post hole (1222) corresponding to the second pole post (1112), and an explosion-proof valve hole (123) corresponding to the explosion-proof valve (112); When the connecting region (121) is located between the opposite ends of the insulating sheet (120) in the first direction, the connecting region (121) is located between the first pole post hole (1221) and the explosion-proof valve hole (123) and / or between the second pole post hole (1222) and the explosion-proof valve hole (123).

7. The battery of any one of claims 2-6, wherein, The length of the cell (110) in the first direction is L, and the length of the connecting region (121) in the first direction is M, (L / 30-5) mm≤M≤(L / 30+5) mm.

8. The battery of any one of claims 1-6, wherein, The insulating sheet (120) is further provided with a detection hole (125), and the connecting region (121) does not overlap the detection hole (125).

9. A battery module, comprising: A battery pack (10) comprising at least one sub-battery pack (101), the sub-battery pack (101) comprising a plurality of batteries (100) as claimed in any one of claims 1-8, the plurality of batteries (100) being arranged along a second direction; at least one pressing strip (20) extending along the second direction and connected with the sub-battery pack (101); wherein the pressing strip (20) is arranged on a side of the top surface (1101) away from the bottom surface (1102) and connected with the battery cell (110) through the connecting area (121).

10. The battery module of claim 9, wherein, The sub-battery pack (101) has opposite ends in a first direction, the pressing strip (20) being located between at least one end of the sub-battery pack (101) in the first direction and / or between the opposite ends of the sub-battery pack (101) in the first direction, the first direction being perpendicular to the second direction.

11. The battery module of claim 10, wherein, The battery pack (10) comprises a plurality of the sub-battery packs (101), the plurality of sub-battery packs (101) being arranged along the first direction; The battery module (200) comprises a first pressing strip (210) and a second pressing strip (220), the first pressing strip (210) being located between the opposite ends of the sub-battery pack (101) in the first direction or at least one end of the battery pack (10) in the first direction, the second pressing strip (220) being located between and connected with adjacent two sub-battery packs (101).

12. The battery module of claim 11, wherein, The length of the second pressing strip (220) in the first direction is 2 times the length of the first pressing strip (210) in the first direction.

13. The battery module of any one of claims 9-12, wherein, The pressing strip (20) is connected with the battery cell (110) by adhesion.

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