Binding end cover of battery module and battery module

Abstract

The utility model provides a battery module bundling end cover and a battery module. The battery module binding end cover comprises a battery module end plate and an end plate reinforcing steel plate, the battery module end plate comprises an end plate body and a reinforcing convex rib, one surface of the end plate body is used for abutting against the battery module, and the other surface of the end plate body is provided with a reinforcing accommodating groove; at least part of the end plate reinforcing steel plate is arranged in the reinforcing containing groove, and the end plate reinforcing steel plate is connected with at least one of the side wall of the reinforcing containing groove and the reinforcing convex rib. The end plate body serves as a bundling baffle for the battery module and provides sufficient extrusion force for bundling of the battery module, the reinforcing convex ribs are additionally arranged at the bottom of the reinforcing containing groove and connected with the end plate reinforcing steel plate, so that connection between the end plate body and the end plate reinforcing steel plate is more stable, and the battery module can be bundled more stably. Therefore, the overall mechanical strength of the battery module binding end cover is improved, and the battery module binding end cover can bear more pressure generated by battery expansion in a battery module.

Description

Technical Field

[0001] The present disclosure relates to the technical field of batteries, and particularly to a battery module bundling end cover and a battery module. Background Art

[0002] Lithium batteries have advantages such as high power density, high energy density, and low self-discharge rate, making them an ideal choice for various applications from small portable electronic devices to large-scale energy storage systems. Multiple single cells are arranged side by side to form a battery aggregate, and a frame for accommodating and fixing the battery aggregate is formed by two battery end plates and two battery side plates fixedly connected together. The battery aggregate is placed in the frame to form a battery module.

[0003] Most of the existing battery end plates are formed by injection molding or die casting. When the battery module is working, it undergoes cyclic charge and discharge. With the electrochemical reaction, the single cells will expand. At this time, restricted by the space and squeezed, an expansion force will be generated. The current battery end plates cannot well absorb the pressure generated by the expansion of the single cells. Especially when the battery module reaches the end of its life, the expansion force will become greater, causing the battery end plate to bear a greater force, resulting in deformation or damage of the battery end plate, squeezing adjacent parts, and more seriously, it may even conduct the expansion force to the battery side plate, causing the side plate to crack, thus leading to electrical safety problems. Summary of the Utility Model

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a battery module bundling end cover and a battery module that can effectively improve the mechanical strength to withstand more pressure generated by battery expansion.

[0005] The purpose of the present disclosure is achieved through the following technical solutions:

[0006] A battery module bundling end cover includes: a battery module end plate and an end plate reinforcing steel plate; the battery module end plate includes an end plate body and reinforcing ribs. One side of the end plate body is used to abut against the battery module, and an enhancing accommodation groove is formed on the other side of the end plate body. The reinforcing ribs are formed at the bottom of the enhancing accommodation groove; at least a part of the end plate reinforcing steel plate is disposed in the enhancing accommodation groove, and the end plate reinforcing steel plate is connected to at least one of the side wall of the enhancing accommodation groove and the reinforcing ribs.

[0007] In one embodiment, the reinforcing ribs protrude towards the end plate reinforcing steel plate.

[0008] In one embodiment, the height of the end plate reinforcing steel plate is equal to the depth of the enhancing accommodation groove.

[0009] In one embodiment, the end plate reinforcing steel plate is respectively connected to the side wall of the reinforcing accommodating groove and the reinforcing rib.

[0010] In one embodiment, the end plate reinforcing steel plate is connected to at least two opposite side walls of the reinforcing accommodating groove.

[0011] In one embodiment, the end plate reinforcing steel plate and the side wall of the reinforcing accommodating groove are perpendicularly arranged at the connection part.

[0012] In one embodiment, the end plate reinforcing steel plate and the side wall of the reinforcing accommodating groove are inclined to each other at the connection part.

[0013] In one embodiment, the battery module bundling end cover further includes at least two steel strip limiting bumps. At least two of the steel strip limiting bumps are oppositely arranged on the end plate reinforcing steel plate. A steel strip bundling limiting area is formed between at least two of the steel strip limiting bumps, and the steel strip bundling limiting area is used for clamping a steel strip.

[0014] In one embodiment, the end plate reinforcing steel plate is provided with at least one lifting hole, and the lifting hole is located in the steel strip bundling limiting area.

[0015] A battery module includes the battery module bundling end cover according to any one of the above embodiments.

[0016] Compared with the prior art, the present disclosure has at least the following advantages:

[0017] The end plate body serves as a bundling baffle for the battery module, providing sufficient extrusion force for bundling the battery module. By adding a reinforcing rib at the bottom of the reinforcing accommodating groove, and connecting the reinforcing rib with the end plate reinforcing steel plate, the connection between the end plate body and the end plate reinforcing steel plate becomes more stable, thereby improving the overall mechanical strength of the battery module bundling end cover, so that the battery module bundling end cover can withstand more pressure generated by battery expansion in the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of a battery module bundling end cover in one embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To facilitate the understanding of the present disclosure, the present disclosure will be described more comprehensively below with reference to the relevant accompanying drawings. The preferred embodiments of the present disclosure are shown in the accompanying drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure content of the present disclosure more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only embodiments.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present disclosure belongs. The terms used in the specification of the present disclosure herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0023] The present disclosure relates to a battery module bundling end cover. In one embodiment, the battery module bundling end cover includes a battery module end plate and an end plate reinforcing steel plate; the battery module end plate includes an end plate body and a reinforcing rib, one side of the end plate body is used to abut against the battery module, and an enhancing accommodation groove is formed on the other side of the end plate body, and the reinforcing rib is formed at the bottom of the enhancing accommodation groove; at least part of the end plate reinforcing steel plate is arranged in the enhancing accommodation groove, and the end plate reinforcing steel plate is connected to at least one of the side wall of the enhancing accommodation groove and the reinforcing rib. The end plate body serves as a bundling baffle for the battery module, providing sufficient extrusion force for the bundling of the battery module. By adding a reinforcing rib at the bottom of the enhancing accommodation groove and connecting the reinforcing rib to the end plate reinforcing steel plate, the connection between the end plate body and the end plate reinforcing steel plate becomes more stable, thereby improving the overall mechanical strength of the battery module bundling end cover, so that the battery module bundling end cover can withstand more pressure generated by battery expansion in the battery module.

[0024] Please refer to Figure 1 , which is a schematic structural diagram of a battery module bundling end cover according to an embodiment of the present disclosure.

[0025] The bundling end cover 10 of an embodiment includes a battery module end plate 100 and an end plate reinforcing steel plate 200; the battery module end plate 100 includes an end plate body 110 and reinforcing ribs 120, one side of the end plate body 110 is used to abut against the battery module, and an enhancing accommodation groove 102 is formed on the other side of the end plate body 110, and the reinforcing ribs 120 are formed at the bottom of the enhancing accommodation groove 102; at least part of the end plate reinforcing steel plate 200 is arranged in the enhancing accommodation groove 102, and the end plate reinforcing steel plate 200 is connected to at least one of the side wall of the enhancing accommodation groove 102 and the reinforcing ribs 120.

[0026] In this embodiment, the end plate body 110 serves as a bundling baffle for the battery module, providing sufficient extrusion force for bundling the battery module. By adding the reinforcing ribs 120 at the bottom of the enhancing accommodation groove 102, and connecting the reinforcing ribs 120 with the end plate reinforcing steel plate 200, the connection between the end plate body 110 and the end plate reinforcing steel plate 200 becomes more stable, thereby improving the overall mechanical strength of the battery module bundling end cover, so that the battery module bundling end cover can withstand more pressure generated by battery expansion in the battery module.

[0027] In one of the embodiments, please refer to Figure 1 , the reinforcing ribs 120 protrude towards the end plate reinforcing steel plate 200. In this embodiment, the reinforcing ribs 120 are arranged in the enhancing accommodation groove 102. Specifically, the reinforcing ribs 120 protrude from the bottom of the enhancing accommodation groove 102, so that the protruding direction of the reinforcing ribs 120 is opposite to that of the end plate reinforcing steel plate 200, thereby forming the reinforcing ribs 120 protruding towards the end plate reinforcing steel plate 200 at the bottom of the enhancing accommodation groove 102, facilitating the stable connection between the end plate reinforcing steel plate 200 and the end plate body 110 through the reinforcing ribs 120, so as to improve the connection stability of the end plate reinforcing steel plate 200 in the enhancing accommodation groove 102, and thus improve the overall mechanical strength of the battery module bundling end cover.

[0028] In one of the embodiments, please refer to Figure 1, the height of the end plate reinforcement steel plate 200 is equal to the depth of the reinforcement accommodating groove 102. In this embodiment, the reinforcement rib 120 is disposed in the reinforcement accommodating groove 102. Specifically, the reinforcement rib 120 is convexly disposed at the bottom of the reinforcement accommodating groove 102, so that the protruding direction of the reinforcement rib 120 is opposite to the end plate reinforcement steel plate 200, so that the bottom of the reinforcement accommodating groove 102 forms a reinforcement rib 120 protruding toward the end plate reinforcement steel plate 200, so that the end plate reinforcement steel plate 200 is stably connected to the end plate body 110 through the reinforcement rib 120, so as to improve the connection stability of the end plate reinforcement steel plate 200 in the reinforcement accommodating groove 102, thereby improving the overall mechanical strength of the battery module bundling end cover. The end plate reinforcement steel plate 200 is synchronously located in the reinforcement accommodating groove 102, that is, the end plate reinforcement steel plate 200 is located on the side of the end plate body 110 away from the battery module. By setting the height of the end plate reinforcement steel plate 200 to be equal to the depth of the reinforcement accommodating groove 102, the end surface of the end plate reinforcement steel plate 200 is flush with the side of the end plate body 110 away from the battery module, which is convenient for the end plate reinforcement steel plate 200 and the end plate body 110 to jointly support the steel belt bundling, that is, the end plate reinforcement steel plate 200 and the end plate body 110 are both in contact with the steel belt, thereby increasing the contact area between the steel belt and the battery module bundling end cover, so as to improve the bundling stability of the steel belt.

[0029] In one embodiment, see Figure 1 , the end plate reinforcement steel plate 200 is respectively connected to the side wall of the reinforcement accommodating groove 102 and the reinforcement rib 120. In this embodiment, the end plate reinforcement steel plate 200 is disposed in the reinforcement accommodating groove 102, and the end plate reinforcement steel plate 200 is simultaneously connected to the side wall of the reinforcement accommodating groove 102 and the reinforcement rib 120. Specifically, the two ends of the end plate reinforcement steel plate 200 are respectively welded to the two side walls of the reinforcement accommodating groove 102, and the bottom of the end plate reinforcement steel plate 200 is welded to the reinforcement rib 120, so that there are at least three connection points between the end plate reinforcement steel plate 200 and the battery module end plate 100, so that the connection between the end plate reinforcement steel plate 200 and the battery module end plate 100 is more stable, thereby improving the overall mechanical strength of the battery module bundling end cover.

[0030] In one embodiment, see Figure 1, the end plate reinforcing steel plate 200 is connected to at least two oppositely arranged side walls of the reinforcing accommodating groove 102. In this embodiment, both ends of the end plate reinforcing steel plate 200 are connected to the side walls of the reinforcing accommodating groove 102, and the end plate reinforcing steel plate 200 connects the two oppositely arranged side walls of the reinforcing accommodating groove 102, so that the end plate reinforcing steel plate 200 is clamped by the two oppositely arranged side walls of the reinforcing accommodating groove 102, thereby making the connection between the end plate reinforcing steel plate 200 and the end plate body 110 more stable, and further improving the overall mechanical strength of the battery module bundling end cover.

[0031] In one embodiment, please refer to Figure 1 , the end plate reinforcing steel plate 200 and the side wall of the reinforcing accommodating groove 102 are perpendicularly arranged at the connection. In this embodiment, the end of the end plate reinforcing steel plate 200 is connected to the side wall of the reinforcing accommodating groove 102. At the connection between the end of the end plate reinforcing steel plate 200 and the side wall of the reinforcing accommodating groove 102, the two are perpendicular to each other, so that the two side walls of the reinforcing accommodating groove 102 stably clamp the end plate reinforcing steel plate 200, so that the clamping forces received by both ends of the end plate reinforcing steel plate 200 are equal, and further improving the installation stability of the end plate reinforcing steel plate 200 in the reinforcing accommodating groove 102.

[0032] In one embodiment, please refer to Figure 1 , the end plate reinforcing steel plate 200 and the side wall of the reinforcing accommodating groove 102 are inclined to each other at the connection. In this embodiment, the end of the end plate reinforcing steel plate 200 is connected to the side wall of the reinforcing accommodating groove 102. At the connection between the end of the end plate reinforcing steel plate 200 and the side wall of the reinforcing accommodating groove 102, the two are inclined to each other, so that the reinforcing accommodating groove 102 is connected to the end plate reinforcing steel plate 200 diagonally, so that the clamping forces received by both ends of the end plate reinforcing steel plate 200 are increased, and further improving the installation stability of the end plate reinforcing steel plate 200 in the reinforcing accommodating groove 102.

[0033] In another embodiment, the number of the end plate reinforcing steel plates is multiple, and the multiple end plate reinforcing steel plates are in a "rice" - shaped structure or a "field" - shaped structure in the reinforcing accommodating groove.

[0034] In one embodiment, please refer to Figure 1The battery module bundling end cap 10 further includes at least two steel belt limiting protrusions 300, at least two of the steel belt limiting protrusions 300 are relatively arranged on the end plate reinforcement steel plate 200, and a steel belt bundling limiting area 302 is formed between the at least two of the steel belt limiting protrusions 300, and the steel belt bundling limiting area 302 is used to clamp the steel belt. In this embodiment, the steel belt limiting protrusion 300 is located on the side of the end plate reinforcement steel plate 200 away from the reinforcement rib 120, and the steel belt limiting protrusion 300 corresponds to the steel belt. Specifically, the steel belt limiting protrusion 300 is convexly arranged on the end plate reinforcement steel plate 200, and a steel belt bundling limiting area 302 is formed between the two steel belt limiting protrusions 300 on the end plate reinforcement steel plate 200, so that the steel belt is stably bundled on the end plate reinforcement steel plate 200.

[0035] Furthermore, the end plate reinforcement steel plate 200 is provided with at least one hoisting hole 202, and the hoisting hole 202 is located in the steel strapping limiting area 302. In this embodiment, the hoisting hole 202 is located on the end plate reinforcement steel plate 200, and the end plate reinforcement steel plate 200 is hoisted to the battery module through the hoisting hole 202. The hoisting hole 202 increases the hoisting area of ​​the end plate reinforcement steel plate 200, making the hoisting of the end plate reinforcement steel plate 200 more stable.

[0036] In one of the embodiments, the present disclosure also relates to a battery module, including the battery module bundling end cap described in any of the above embodiments. In this embodiment, the end plate body serves as a bundling baffle for the battery module, providing sufficient extrusion force for bundling the battery module, and by adding a reinforcing rib at the bottom of the reinforcing groove, the reinforcing rib is connected to the end plate reinforcing steel plate, so that the connection between the end plate body and the end plate reinforcing steel plate is more stable, thereby improving the overall mechanical strength of the battery module bundling end cap, so that the battery module bundling end cap can withstand more pressure generated by battery expansion in the battery module.

[0037] The above-described embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present disclosure. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the attached claims.

Claims

1. A battery module bundling end cover, characterized in that, Comprising: A battery module end plate, the battery module end plate includes an end plate body and reinforcing ribs. One side of the end plate body is used to abut against the battery module, and an enhanced accommodation groove is formed on the other side of the end plate body. The reinforcing ribs are formed at the bottom of the enhanced accommodation groove. An end plate reinforcing steel plate, at least a part of the end plate reinforcing steel plate is arranged in the enhanced accommodation groove, and the end plate reinforcing steel plate is connected to at least one of the side walls of the enhanced accommodation groove and the reinforcing ribs.

2. The battery module bundling end cover according to claim 1, wherein, The reinforcing ribs protrude towards the end plate reinforcing steel plate.

3. The battery module bundling end cover according to claim 1, characterized in that, The height of the end plate reinforcing steel plate is less than or equal to the depth of the enhanced accommodation groove.

4. The battery module bundling end cover according to claim 1, wherein, The end plate reinforcing steel plate is respectively connected to the side walls of the enhanced accommodation groove and the reinforcing ribs.

5. The battery module bundling end cover according to claim 1, characterized in that, The end plate reinforcing steel plate is connected to at least two relatively arranged side walls of the enhanced accommodation groove.

6. The battery module bundling end cover according to claim 1, wherein The end plate reinforcing steel plate and the side walls of the enhanced accommodation groove are perpendicularly arranged at the connection.

7. The battery module bundling end cover according to claim 1, characterized in that, The end plate reinforcing steel plate and the side walls of the enhanced accommodation groove are obliquely arranged at the connection.

8. The battery module bundling end cover according to claim 1, characterized in that, The battery module bundling end cover further includes at least two steel strip limiting bumps. At least two of the steel strip limiting bumps are relatively arranged on the end plate reinforcing steel plate, and a steel strip bundling limiting area is formed between at least two of the steel strip limiting bumps. The steel strip bundling limiting area is used for clamping the steel strip.

9. The battery module bundling end cover according to claim 8, characterized in that, The end plate reinforcing steel plate is provided with at least one lifting hole, and the lifting hole is located in the steel strip bundling limiting area.

10. A battery module, characterized in that, Comprising the battery module bundling end cover according to any one of claims 1 to 9.

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