Battery end plate and battery module

Abstract

This disclosure provides a battery end plate and a battery module; the battery end plate includes an end plate body and a limiting protrusion structure; the limiting protrusion structure is disposed on the side end face of the end plate body; a limiting strip lateral groove is formed on the limiting protrusion structure; the end plate body has an outer support surface, which is opposite to the end face of the battery module; the outer support surface extends into the limiting strip lateral groove and forms a guiding arc portion; when the battery module discharges, although the battery module shortens in the length direction, that is, the elongated steel strip may separate from the outer support surface, the change in the width direction of the battery module is small, so that part of the steel strip can still be kept in the limiting strip lateral groove, thereby reducing the occurrence of the elongated steel strip falling off the battery end plate, and ultimately reducing the occurrence of battery module short circuit.

Description

Technical Field

[0001] This disclosure relates to the technical field of new energy batteries, and in particular to a battery end plate and a battery module. Background Technology

[0002] With the increasing power consumption of electric vehicles, energy storage boxes, and other electrical devices, it has become necessary to stack multiple individual batteries to form battery packs to improve the power supply capacity of these devices. Some manufacturers use battery modules, such as those described in Chinese patent document CN215869661U, which first bind the battery pack together with steel straps. Then, battery end plates are placed between the battery pack ends and the steel straps to tighten the steel straps, constrain the battery pack size, provide pre-pressure, or resist battery expansion. However, as multiple individual batteries expand simultaneously during charging, the steel straps are significantly stretched along the length of the battery pack. When the battery pack discharges, the multiple individual batteries contract simultaneously, causing the battery pack to shorten in length. The stretched steel straps, due to insufficient compressive force, may wobble and detach from the battery end plates, or even fall off entirely. The detached steel straps could potentially come into contact with conductive parts of the battery pack, causing a short circuit. Utility Model Content

[0003] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a battery end plate and battery module that can maintain the stability of the steel strip even after the steel strip is stretched.

[0004] The purpose of this disclosure is achieved through the following technical solution:

[0005] A battery end plate, comprising:

[0006] End plate body, the end plate body is used to fit against the end face of the battery pack;

[0007] The battery end plate also includes a limiting protrusion structure;

[0008] The limiting protrusion structure is disposed on the side end face of the end plate body, and the limiting protrusion structure is used to protrude along the width direction of the battery pack; a limiting strip side groove is formed on the limiting protrusion structure, and the limiting strip side groove is used to accommodate a portion of the steel strip; the end plate body has an outer support surface, and the outer support surface is opposite to the end face of the battery pack; the outer support surface extends from the limiting strip side groove and forms a guide arc portion; the outer support surface is used to abut against the steel strip, and stretches the steel strip when the battery pack expands, so that the steel strip is tightly attached to the bottom of the limiting strip side groove along the guide arc portion.

[0009] In some embodiments, the limiting protrusion structure includes at least two protrusions, each of which is arranged vertically at intervals, and a limiting lateral groove is formed between two adjacent protrusions.

[0010] In some embodiments, a downward-sloping guide surface is formed on the protrusion near the top surface of the end plate body, the downward-sloping guide surface being inclined downward from the top surface of the end plate body.

[0011] In some embodiments, the guide ramp extends to the top surface of the end plate body; and / or,

[0012] The distance between the surface of the guide ramp and the side end face of the end plate body gradually decreases along the anti-gravity direction.

[0013] In some embodiments, a protrusion near the bottom surface of the end plate body is formed with an upward guide slope, which is inclined upward from the bottom surface of the end plate body.

[0014] In some embodiments, the guide ramp extends to the bottom surface of the end plate body; and / or,

[0015] The distance between the surface of the guide ramp and the side end face of the end plate body gradually decreases along the direction of gravity.

[0016] In some embodiments, the number of limiting protrusions includes three, namely an upper protrusion, a middle protrusion, and a lower protrusion arranged sequentially along the direction of gravity; the length of the lower protrusion protruding from the end plate body is greater than the length of the middle protrusion protruding from the end plate body, and the length of the middle protrusion protruding from the end plate body is greater than the length of the upper protrusion protruding from the end plate body.

[0017] A battery module includes a steel strip, a battery pack, and a battery end plate according to any of the above embodiments; the steel strip binds the battery pack, the end plate body is disposed between the end face of the battery pack and the steel strip, the outer support surface abuts against the steel strip, and the belt limiting side groove accommodates a portion of the steel strip.

[0018] In some embodiments, the battery pack includes a deformable pretensioner and at least two individual cells, the individual cells being stacked and the deformable pretensioner being disposed between two adjacent individual cells; the individual cells located at the ends of the battery pack are attached to the end plate body.

[0019] In some embodiments, the battery module further includes an insulating sheet disposed between the end plate body and the end face of the battery pack; the insulating sheet has a damping portion that extends beyond the end face of the battery pack and folds over to the side of the battery pack; the damping portion contacts the steel strip.

[0020] Compared with the prior art, this disclosure has at least the following advantages:

[0021] In the aforementioned battery end plate, the outer support surface on the end plate body is away from the end face of the battery pack, and the guide arc portion of the outer support surface extends towards the limiting side groove. At this time, the steel strip can contact the outer support surface, and part of the steel strip can be accommodated in the limiting side groove. When multiple individual cells in the battery pack expand simultaneously during charging, the outer support surface will synchronously stretch the steel strip in the length direction of the battery pack. After the steel strip is tightened, it will deform and stick tightly to the bottom of the limiting side groove along the guide arc portion. When the battery pack discharges, since the limiting protrusion structure is set on the side end face of the end plate body and protrudes along the width direction of the battery pack, although the battery pack shortens in the length direction, that is, the stretched steel strip may separate from the outer support surface, the change in the width direction of the battery pack is small, so that part of the steel strip can still continue to be kept in the limiting side groove, thereby reducing the occurrence of the stretched steel strip falling off the battery end plate and ultimately reducing the occurrence of battery pack short circuit. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a battery end plate according to an embodiment of the present disclosure;

[0024] Figure 2 This is a side view of a battery module according to another embodiment of the present disclosure;

[0025] Figure 3 for Figure 2 The battery module shown is a partial cross-sectional view obtained by cutting along A1-A2;

[0026] Figure 4 for Figure 3 The enlarged view shown at point B in the middle.

[0027] Figure label:

[0028] 10. Battery end plate;

[0029] 100. End plate body; 110. Outer support surface; 1110. Guide arc-shaped part;

[0030] 200. Limiting protrusion structure; 210. Protrusion; 2110. Upper protrusion; 2111. Lower guide slope; 2120. Middle protrusion; 2130. Lower protrusion; 2131. Upper guide slope; 201. Limiting band lateral groove; 2011. Upper limit band lateral groove; 2012. Lower limit band lateral groove;

[0031] 30. Steel strip; 310. Second magnetic block;

[0032] 40. Battery pack; 410. Deformable preload sheet; 420. Individual cell;

[0033] 50. Insulating sheet; 510. Damping part; 520. First magnetic block. Detailed Implementation

[0034] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0038] Please see Figure 1 and Figure 2In one embodiment, the battery end plate 10 includes an end plate body 100 and a limiting protrusion structure 200. The end plate body 100 is disposed in contact with the end face of the battery pack 40. The limiting protrusion structure 200 is disposed on the side end face of the end plate body 100 and is provided to protrude along the width direction of the battery pack 40. A limiting strip side groove 201 is formed on the limiting protrusion structure 200, which is used to accommodate a portion of the steel strip 30. The end plate body 100 has an outer support surface 110, which is opposite to the end face of the battery pack 40. The outer support surface 110 extends toward the limiting strip side groove 201 and forms a guiding arc-shaped portion 1110. The outer support surface 110 is used to abut against the steel strip 30 and stretch the steel strip 30 when the battery pack 40 expands, so that the steel strip 30 is tightly attached to the bottom of the limiting strip side groove 201 along the guiding arc-shaped portion 1110.

[0039] It is understandable that, since the outer support surface 110 on the end plate body 100 is away from the end face of the battery pack 40, and the guide arc portion 1110 of the outer support surface 110 extends towards the band-limiting side groove 201, the steel strip 30 can contact the outer support surface 110 at this time, and part of the steel strip 30 can be accommodated in the band-limiting side groove 201. When multiple individual cells 420 in the battery pack 40 expand simultaneously during charging, the outer support surface 110 will simultaneously stretch the steel strip 30 in the length direction of the battery pack 40. After the steel strip 30 is tightened, it will deform and adhere tightly to the band-limiting side groove 201 along the guide arc portion 1110. The bottom of the groove 01, when the battery pack 40 discharges, because the limiting protrusion structure 200 is set on the side end face of the end plate body 100 and protrudes along the width direction of the battery pack 40, although the battery pack 40 shortens in the length direction, that is, the elongated steel strip 30 may separate from the outer support surface 110, the change in the width direction of the battery pack 40 is small, so that part of the steel strip 30 can still continue to be kept in the limiting side groove 201, thereby reducing the occurrence of the elongated steel strip 30 falling off the battery end plate 10, and ultimately reducing the occurrence of short circuit of the battery pack 40.

[0040] Please see Figure 1 and Figure 2 In this embodiment, there are two limiting protrusion structures 200, which are respectively disposed on two opposite side end faces of the end plate body 100. The belt-limiting side groove 201 of one limiting protrusion structure 200 is opposite to the belt-limiting side groove 201 of the other limiting protrusion structure 200, so that the first part and the second part of the same steel strip 30 can be accommodated by the two belt-limiting side grooves 201 respectively, thereby improving the overall limiting effect on the steel strip 30. Specifically, the limiting protrusion structure 200 and the end plate body 100 are integrally connected structures.

[0041] Please see Figure 1In some embodiments, the limiting protrusion structure 200 includes at least two protrusions 210, which are arranged vertically at intervals, and a band-limiting lateral groove 201 is formed between adjacent two protrusions 210. It is understood that because the protrusions 210 are arranged vertically at intervals, a band-limiting lateral groove 201 can be formed between adjacent two protrusions 210, that is, the limiting protrusion structure 200 can form at least one band-limiting lateral groove 201, thereby accommodating at least one portion of the steel strip 30 through a band-limiting lateral groove 201. In this embodiment, there are three protrusions 210, and the middle protrusion 210 can form a band-limiting lateral groove 201 with the protrusions 210 on both sides, thereby accommodating at least two portions of the steel strip 30. Furthermore, the protrusion 210 located in the middle extends in a linear shape and forms a rib-like or strip-like structure, which can separate different band-limiting side grooves 201 through the protrusion 210, and avoid the accommodating distance of each band-limiting side groove 201 being too close, so that the steel strip 30 can enter the adjacent band-limiting side groove 201 during the expansion and contraction of the battery pack 40.

[0042] Please see Figure 2 In some embodiments, the protrusion 210 near the top surface of the end plate body 100 is formed with a downward guide slope 2111, which is inclined downward from the top surface of the end plate body 100. It can be understood that since the downward guide slope 2111 of the protrusion 210 is inclined downward from the top surface of the end plate body 100, and the protrusion 210 is located near the top surface of the end plate body 100, when the end plate body 100 is attached to the end face of the battery pack 40, a portion of the steel strip 30 can move downward along the downward guide slope 2111 through the top surface of the end plate body 100, thereby more smoothly entering the corresponding band-limiting side groove 201, ultimately positioning the end plate body 100 between the end face of the battery pack 40 and the steel strip 30. In this embodiment, the downward guide slope 2111 is inclined downward from the top surface of the end plate body 100 toward the band-limiting side groove 201 closest to it.

[0043] Please see Figure 2 In some embodiments, the guide ramp 2111 extends to the top surface of the end plate body 100. It can be understood that because the guide ramp 2111 extends to the top surface of the end plate body 100, the steel strip 30 can more easily pass through the top surface of the end plate body 100 and enter the guide ramp 2111.

[0044] Please see Figure 2In some embodiments, the distance between the surface of the guide ramp 2111 and the side end face of the end plate body 100 gradually decreases along the anti-gravity direction. It can be understood that, since the distance between the surface of the guide ramp 2111 and the side end face of the end plate body 100 gradually decreases along the anti-gravity direction—specifically, the distance between the surface of the guide ramp 2111 and the side end face of the end plate body 100 gradually decreases from the corresponding belt-limiting side groove 201 towards the top surface of the end plate body 100—the shorter the distance between the surface of the guide ramp 2111 and the side end face of the end plate body 100, the easier it is for the steel strip 30 to pass through the top surface of the end plate body 100 and enter the guide ramp 2111.

[0045] Please see Figure 2 In some embodiments, the protrusion 210 near the bottom surface of the end plate body 100 has an upward guide slope 2131, which is inclined upward from the bottom surface of the end plate body 100. It can be understood that since the upward guide slope 2131 of the protrusion 210 is inclined upward from the bottom surface of the end plate body 100, and the protrusion 210 is located close to the bottom surface of the end plate body 100, when the end plate body 100 is attached to the end face of the battery pack 40, a portion of the steel strip 30 can move upward along the upward guide slope 2131 through the bottom surface of the end plate body 100, thereby more smoothly entering the corresponding band-limiting side groove 201, ultimately positioning the end plate body 100 between the end face of the battery pack 40 and the steel strip 30. In this embodiment, the upward guide slope 2131 is inclined upward from the bottom surface of the end plate body 100 toward the band-limiting side groove 201 closest to it.

[0046] Please see Figure 2 In some embodiments, the guide ramp 2131 extends to the bottom surface of the end plate body 100. It can be understood that because the guide ramp 2131 extends to the bottom surface of the end plate body 100, the steel strip 30 can more easily pass through the bottom surface of the end plate body 100 and enter the guide ramp 2131.

[0047] Please see Figure 2 In some embodiments, the distance between the surface of the guide ramp 2131 and the side end face of the end plate body 100 gradually decreases along the direction of gravity. It can be understood that, since the distance between the surface of the guide ramp 2131 and the side end face of the end plate body 100 gradually decreases along the direction of gravity—specifically, the distance between the surface of the guide ramp 2131 and the side end face of the end plate body 100 gradually decreases from the corresponding belt-limiting side groove 201 towards the bottom surface of the end plate body 100—the shorter the distance between the surface of the guide ramp 2131 and the side end face of the end plate body 100, the easier it is for the steel strip 30 to pass through the bottom surface of the end plate body 100 and enter the guide ramp 2131.

[0048] Please see Figure 1 and Figure 2 In some embodiments, the number of limiting protrusion structures 200 includes three, namely an upper protrusion 2110, a middle protrusion 2120 and a lower protrusion 2130 arranged sequentially along the direction of gravity; the lower protrusion 2130 protrudes from the end plate body 100 by a greater length than the middle protrusion 2120 protrudes from the end plate body 100, and the middle protrusion 2120 protrudes from the end plate body 100 by a greater length than the upper protrusion 2110 protrudes from the end plate body 100. It is understandable that since the upper protrusion 2110, the middle protrusion 2120 and the lower protrusion 2130 are arranged sequentially along the direction of gravity, specifically, the middle protrusion 2120 and the upper protrusion 2110 can form an upper limit band side groove 2011. The length of the middle protrusion 2120 protruding out of the end plate body 100 is greater than the length of the upper protrusion 2110 protruding out of the end plate body 100, so that the part of the steel strip 30 contained in the upper limit band side groove 2011 can be further supported by the protruding part of the middle protrusion 2120, so that after the steel strip 30 is stretched, its part can be more stably kept in the upper limit band side groove 2011. Furthermore, a lower limit band lateral groove 2012 can be formed between the middle protrusion 2120 and the lower protrusion 2130. The length of the lower protrusion 2130 protruding from the end plate body 100 is greater than the length of the middle protrusion 2120 protruding from the end plate body 100. This allows the portion of the steel strip 30 contained in the lower limit band lateral groove 2012 to be further supported by the protruding portion of the lower protrusion 2130, thereby enabling the steel strip 30 to be more stably held within the lower limit band lateral groove 2012 after it is stretched.

[0049] Please see Figure 2 and Figure 3 This disclosure also provides a battery module, including a steel strip 30, a battery pack 40, and a battery end plate 10 of any of the above embodiments; the steel strip 30 binds the battery pack 40, the end plate body 100 is disposed between the end face of the battery pack 40 and the steel strip 30, the outer support surface 110 abuts against the steel strip 30, and the belt limiting side groove 201 accommodates a portion of the steel strip 30. It is understood that by applying the battery end plate 10 of this disclosure to the battery pack 40, when multiple individual cells 420 in the battery pack 40 expand simultaneously during charging, the outer support surface 110 will simultaneously stretch the steel strip 30 in the length direction of the battery pack 40. After the steel strip 30 is tightened, it will deform and adhere tightly to the bottom of the groove 201 along the guide arc portion 1110. When the battery pack 40 is discharging, although the battery pack 40 shortens in the length direction, part of the steel strip 30 can still remain in the groove 201, thereby reducing the occurrence of the stretched steel strip 30 falling off the battery end plate 10.

[0050] In this embodiment, there are two battery end plates 10. One battery end plate 10 is respectively provided between each end face of the battery pack 40 and the steel strip 30, that is, battery end plates 10 are provided on both opposite end faces of the battery pack 40. The two battery end plates 10 can provide compressive force under the binding action of the steel strip 30, thereby fixing and constraining the battery pack 40. Furthermore, the battery end plates 10 are provided with lifting holes and installation interfaces.

[0051] In some embodiments, the battery pack 40 includes a deformable pretensioner 410 and at least two individual cells 420, which are stacked together. A deformable pretensioner 410 is positioned between adjacent individual cells 420. The individual cells 420 located at the ends of the battery pack 40 are in contact with the end plate body 100. It is understood that because the deformable pretensioner 410 is positioned between adjacent individual cells 420 in the battery pack 40, the stacked individual cells 420 can be compressed when the battery pack 40 is bundled, i.e., the deformable pretensioner 410 is compressed. This allows the deformable pretensioner 410 to provide deformation force after the battery pack 40 is bundled, thereby compensating for the gap between the steel strip 30 and the battery pack 40. This gap can be a tolerance or formed by the expansion and contraction of the battery pack 40, thus ensuring stable compressive force between the steel strip 30 and the battery end plate 10. Specifically, the deformable pretensioner 410 can be a heat-insulating cotton sheet.

[0052] Please see Figure 3 and Figure 4 In some embodiments, the battery module further includes an insulating sheet 50 disposed between the end plate body 100 and the end face of the battery pack 40. The insulating sheet 50 has a damping portion 510 extending beyond the end face of the battery pack 40 and folded to the side of the battery pack 40. The damping portion 510 contacts the steel strip 30. It can be understood that by providing the insulating sheet 50 between the end plate body 100 and the end face of the battery pack 40, the insulation protection of the battery pack 40 can be further improved. Furthermore, the contact between the damping portion 510 of the insulating sheet 50 and the steel strip 30 can further reduce the swaying of the steel strip 30 through the frictional force of the damping portion 510. Further, the damping portion 510 has a built-in first magnetic block 520, and the steel strip 30 has a built-in second magnetic block 310. The first magnetic block 520 and the second magnetic block 310 are positioned correspondingly and magnetically attracted to each other, further reducing the occurrence of the steel strip 30 detaching.

[0053] Compared with the prior art, this disclosure has at least the following advantages:

[0054] The aforementioned battery end plate 10 has an outer support surface 110 on its body 100 that faces away from the end face of the battery pack 40, and the guide arc portion 1110 of the outer support surface 110 extends toward the band-limiting side groove 201. At this time, the steel strip 30 can contact the outer support surface 110, and part of the steel strip 30 can be accommodated in the band-limiting side groove 201. When multiple individual cells 420 in the battery pack 40 expand simultaneously during charging, the outer support surface 110 will simultaneously stretch the steel strip 30 in the length direction of the battery pack 40. After the steel strip 30 is taut, it will deform and adhere tightly to the band-limiting side along the guide arc portion 1110. The bottom of the groove 201 is connected to the battery pack 40. When the battery pack 40 discharges, the limiting protrusion structure 200 is provided on the side end face of the end plate body 100 and protrudes along the width direction of the battery pack 40. At this time, although the battery pack 40 shortens in the length direction, that is, the elongated steel strip 30 may separate from the outer support surface 110, the change in the width direction of the battery pack 40 is small, so that part of the steel strip 30 can still be kept in the limiting side groove 201, thereby reducing the occurrence of the elongated steel strip 30 falling off the battery end plate 10, and ultimately reducing the occurrence of short circuit of the battery pack 40.

[0055] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A battery end plate, comprising: End plate body, the end plate body is used to fit against the end face of the battery pack; The battery end plate is characterized in that it further includes a limiting protrusion structure; The limiting protrusion structure is disposed on the side end face of the end plate body, and the limiting protrusion structure is used to protrude along the width direction of the battery pack; a limiting strip side groove is formed on the limiting protrusion structure, and the limiting strip side groove is used to accommodate a portion of the steel strip; the end plate body has an outer support surface, and the outer support surface is opposite to the end face of the battery pack; the outer support surface extends from the limiting strip side groove and forms a guide arc portion; the outer support surface is used to abut against the steel strip, and stretches the steel strip when the battery pack expands, so that the steel strip is tightly attached to the bottom of the limiting strip side groove along the guide arc portion.

2. The battery end plate of claim 1, wherein, The limiting protrusion structure includes at least two protrusions, each of which is arranged vertically at intervals, and a limiting lateral groove is formed between two adjacent protrusions.

3. The battery end plate of claim 2, wherein, A downward-sloping guide surface is formed on the protrusion near the top surface of the end plate body, and the downward-sloping guide surface is inclined downward from the top surface of the end plate body.

4. The battery end plate of claim 3, wherein, The guide ramp extends to the top surface of the end plate body; and / or, The distance between the surface of the guide ramp and the side end face of the end plate body gradually decreases along the anti-gravity direction.

5. The battery end plate of claim 2, wherein, A guide ramp is formed on the protrusion near the bottom surface of the end plate body, and the guide ramp is inclined upward from the bottom surface of the end plate body.

6. The battery end plate of claim 5, wherein, The inclined surface of the guide extends to the bottom surface of the end plate body; and / or, The distance between the surface of the guide ramp and the side end face of the end plate body gradually decreases along the direction of gravity.

7. The battery end plate according to claim 1, characterized in that, The number of limiting protrusions includes three, namely an upper protrusion, a middle protrusion, and a lower protrusion arranged sequentially along the direction of gravity; the lower protrusion protrudes from the end plate body by a greater length than the middle protrusion protrudes from the end plate body, and the middle protrusion protrudes from the end plate body by a greater length than the upper protrusion protrudes from the end plate body.

8. A battery module, characterized by The device includes a steel strip, a battery pack, and a battery end plate according to any one of claims 1 to 7; the steel strip binds the battery pack, the end plate body is disposed between the end face of the battery pack and the steel strip, the outer support surface abuts against the steel strip, and the belt-limiting lateral groove accommodates a portion of the steel strip.

9. The battery module of claim 8, wherein, The battery pack includes a deformable pre-tightening plate and at least two individual cells, which are stacked together, with the deformable pre-tightening plate disposed between two adjacent individual cells; the individual cells located at the ends of the battery pack are attached to the end plate body.

10. The battery module of claim 8, wherein, The battery module further includes an insulating sheet disposed between the end plate body and the end face of the battery pack; the insulating sheet has a damping portion that extends beyond the end face of the battery pack and folds over to the side of the battery pack; the damping portion contacts the steel strip.

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