Battery module end plate assembly, battery module and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery module end plate assembly, a battery module and a battery pack, the battery module end plate assembly comprises two end plates, the two end plates are configured to be respectively clamped at two opposite ends of a battery cell group, the two end plates are both provided with avoiding grooves, notches of the avoiding grooves in the two end plates are arranged in a back-to-back manner, and the battery cell group is arranged between the two end plates. Two clamping parts of the clamping equipment can extend into the corresponding avoiding grooves respectively, and the two clamping parts can abut against the groove bottoms of the corresponding avoiding grooves respectively.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery module end plate assembly, a battery module and a battery pack. Background Art

[0002] A battery module generally includes end plates and a battery cell group formed by arranging a plurality of battery cells in sequence. Among them, usually two end plates are provided, and the two end plates are respectively clamped at opposite ends of the battery cell group to play a constraining role on the battery cell group.

[0003] In the prior art, the surface of the end plate facing away from the battery cell group is covered with reinforcing ribs, so that there is no area on the end plate that can be clamped by the clamping jaws of the manipulator. Therefore, the manipulator cannot be used to clamp and transfer the battery module, which increases the difficulty of transferring the battery module and reduces the production efficiency of the battery pack.

[0004] Therefore, there is an urgent need to propose a battery module end plate assembly, a battery module and a battery pack to solve the above technical problems. Summary of the Utility Model

[0005] The first object of the present application is to provide a battery module end plate assembly, which can reduce the difficulty of clamping and transferring the battery module, and thus is beneficial to improving the production efficiency of the battery pack.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] The battery module end plate assembly includes two end plates, the two end plates are configured to be respectively clamped at opposite ends of the battery cell group, avoidance grooves are provided on both end plates, and the openings of the avoidance grooves on the two end plates face away from each other. The two clamping parts of the clamping device can respectively extend into a corresponding avoidance groove, and the two clamping parts can respectively abut against the bottom of the corresponding avoidance groove.

[0008] Optionally, the end plate includes an end plate body and a surrounding plate, and the surrounding plate is arranged on the end plate body;

[0009] The number of the surrounding plates is at least two, and at least two surrounding plates are connected end to end in sequence to enclose an avoidance groove;

[0010] Or, the surrounding plate is a continuous annular structure, and the surrounding plate encloses an avoidance groove.

[0011] Optionally, a weight reduction groove is provided on the end plate body, the opening of the weight reduction groove faces away from the battery cell group, and at least two surrounding plates are all arranged at the bottom of the weight reduction groove.

[0012] Optionally, the height of the surrounding plate is less than or equal to the depth of the weight reduction groove.

[0013] Optionally, the end plate further includes reinforcing ribs, and the reinforcing ribs are arranged at the bottom of the weight reduction groove and / or on the inner wall of the weight reduction groove.

[0014] Optionally, the cross-sectional area of the notch of the avoidance groove is greater than or equal to 100 mm 2 and less than or equal to 3000 mm 2 .

[0015] The second object of the present application is to provide a battery module, which is difficult to clamp and transfer, thereby facilitating the improvement of the production efficiency of the battery pack.

[0016] To achieve this purpose, the present application adopts the following technical solutions:

[0017] The battery module includes a battery cell group and the above-mentioned battery module end plate assembly, and the two end plates of the battery module end plate assembly are respectively clamped at opposite ends of the battery cell group.

[0018] The third object of the present application is to provide a battery pack with high production efficiency.

[0019] To achieve this purpose, the present application adopts the following technical solutions:

[0020] The battery pack includes a battery box and the above-mentioned battery module. The battery box is provided with a receiving cavity, and the battery module is arranged in the receiving cavity.

[0021] Optionally, the side of the battery cell group facing the inner bottom wall of the receiving cavity is flush with the side of the end plate facing the inner bottom wall of the receiving cavity.

[0022] Optionally, the inner bottom wall of the receiving cavity is provided with convex ribs, and the side of the end plate facing away from the battery cell group is provided with a stepped structure, the stepped structure is arranged facing the inner bottom wall of the receiving cavity, and the stepped structure is lapped with the convex ribs.

[0023] Optionally, the surface of the side of the end plate facing away from the battery cell group and the step tread surface of the stepped structure are transitioned through an arc surface.

[0024] Advantages of the present application:

[0025] For the battery module end plate assembly provided by the present application, avoidance grooves are provided on both end plates, and the notches of the avoidance grooves on the two end plates are arranged back to back, that is, the notches of the avoidance grooves on the two end plates are arranged away from the battery cell group. In actual production, the two clamping parts of the clamping device can extend into a corresponding avoidance groove, and the bottoms of the two avoidance grooves can abut against a corresponding clamping part, so that the two clamping parts of the clamping device can cooperate with each other to clamp the two end plates sandwiching the battery cell group. It can be seen that the setting of the avoidance groove greatly reduces the difficulty of clamping and transferring the battery module, thereby facilitating the improvement of the production efficiency of the battery pack.

[0026] The battery module provided by this application adopts the above-mentioned battery module end plate assembly. In actual production, clamping equipment can be used to clamp and transfer the battery module, reducing the difficulty of transferring the battery module and improving the production efficiency of the battery pack.

[0027] The battery pack provided by this application adopts the above-mentioned battery module and has a high production efficiency. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the end plate provided by an embodiment of this application Figure 1 ;

[0029] Figure 2 It is a schematic structural diagram of the end plate provided by an embodiment of this application Figure 2 ;

[0030] Figure 3 It is a schematic structural diagram of the end plate provided by an embodiment of this application Figure 3 ;

[0031] Figure 4 It is a schematic structural diagram of the battery module provided by an embodiment of this application;

[0032] Figure 5 It is a schematic partial structural diagram of the battery pack provided by an embodiment of this application.

[0033] In the figure:

[0034] 10, battery cell group; 20, battery box; 21, accommodation cavity; 22, rib.

[0035] 100, end plate; 110, avoidance groove; 120, end plate body; 130, surrounding plate; 140, weight reduction groove; 150, reinforcing rib; 160, step structure; 161, step tread; 162, step vertical surface; 170, arc surface; 180, mounting hole. Detailed Description of the Embodiment

[0036] The following further describes this application in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain this application, rather than limiting this application. Additionally, it should be noted that for the convenience of description, only parts related to this application rather than all structures are shown in the drawings.

[0037] In the description of the present application, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] In the present application, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0039] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] This embodiment provides a battery module end plate assembly, which can reduce the difficulty of clamping and transferring the battery module, and thus is beneficial to improving the production efficiency of the battery pack.

[0041] Specifically, as Figures 1 to 4 shown, the battery module end plate assembly includes two end plates 100, and the two end plates 100 are configured to be respectively clamped at opposite ends of the battery cell group 10. Avoidance grooves 110 are provided on both of the two end plates 100, and the openings of the avoidance grooves 110 on the two end plates 100 are arranged in opposite directions. Two clamping parts (not shown in the figure) of the clamping device can respectively extend into a corresponding avoidance groove 110, and the two clamping parts can respectively abut against the bottom of a corresponding avoidance groove 110.

[0042] Optionally, the above-mentioned clamping device is a manipulator, and the above-mentioned clamping part is the jaw of the manipulator. Of course, in other implementation schemes, the clamping device can be other devices with clamping functions, such as two clamping plates respectively driven by two driving devices.

[0043] In the battery module end plate assembly provided in this embodiment, avoidance grooves 110 are provided on both end plates 100, and the openings of the avoidance grooves 110 on the two end plates 100 are arranged back to back, that is, the openings of the avoidance grooves 110 on the two end plates 100 both face away from the battery cell group 10. In actual production, the two clamping parts of the clamping device can extend into a corresponding avoidance groove 110, and the bottoms of the two avoidance grooves 110 can abut against a corresponding clamping part, so that the two clamping parts of the clamping device can cooperate with each other to clamp the two end plates 100 sandwiching the battery cell group 10. It can be seen that the setting of the avoidance grooves 110 greatly reduces the difficulty of clamping and transferring the battery module, which is beneficial to improving the production efficiency of the battery pack.

[0044] Optionally, as Figures 1 to 4 shown, the end plate 100 includes an end plate body 120 and at least two surrounding plates 130. The at least two surrounding plates 130 are all arranged on the end plate body 120, and the at least two surrounding plates 130 are connected end to end in sequence to enclose the avoidance groove 110. In this embodiment, the number of the surrounding plates 130 is four. In other implementation schemes, the number of the surrounding plates 130 can be two, three, five or even more. It can be understood that the shape of the avoidance groove 110 will change with the change of the number of the surrounding plates 130. For example, when there are two surrounding plates 130, the avoidance groove 110 is circular; when there are three surrounding plates 130, the avoidance groove 110 is triangular; when there are four surrounding plates 130, the avoidance groove 110 is square. Other numbers of the surrounding plates 130 and other shapes of the avoidance groove 110 will not be listed one by one here.

[0045] In another implementation scheme, the number of the surrounding plates 130 can also be one, and this surrounding plate 130 is a continuous ring structure, and the surrounding plate 130 encloses to form the avoidance groove 110. It can be understood that the above continuous ring structure can be a circular ring structure or a square ring structure, etc.

[0046] Optionally, the cross-sectional area of the opening of the avoidance groove 110 is greater than or equal to 100 mm 2 and less than or equal to 3000 mm 2 . Exemplarily, the cross-sectional area of the opening of the avoidance groove 110 can be 100 mm 2 , 2000 mm 2 , 2500 mm 2 or 3000 mm 2 and so on. If the cross-sectional area of the opening of the avoidance groove 110 is less than 100 mm 2 , there may be a problem that the clamping parts of some models of clamping devices cannot extend into the avoidance groove 110. If the cross-sectional area of the opening of the avoidance groove 110 is greater than 3000 mm 2, the structural strength of the end plate 100 will be reduced. Therefore, the cross-sectional area of the notch of the avoidance groove 110 is set to be greater than or equal to 100 mm 2 and less than or equal to 3000 mm 2 , which can not only make the end plate 100 adapt to diverse clamping devices, but also ensure the structural strength of the end plate 100.

[0047] Further, in this embodiment, the number of the surrounding plates 130 is four, and the four surrounding plates cooperate to enclose a square avoidance groove 110. Therefore, the side length of each surrounding plate 130 is 50 mm, and the four surrounding plates 130 enclose a square avoidance groove 110 with a length and a width of 50 mm, providing sufficient space for the clamping part of the clamping device to facilitate the clamping of the battery module, and at the same time ensuring that the end plate 100 has sufficient structural strength.

[0048] Further, as Figures 1 to 4 shown, a weight reduction groove 140 is provided on the end plate body 120, and the notch of the weight reduction groove 140 faces away from the battery cell group 10. At least two surrounding plates 130 are arranged at the bottom of the weight reduction groove 140. The setting of the weight reduction groove 140 can reduce the overall weight of the end plate 100, which is beneficial to improving the energy density of the battery pack.

[0049] Furthermore, as Figures 1 to 4 shown, the height of the surrounding plate 130 is less than or equal to the depth of the weight reduction groove 140, so that the structure on the side of the end plate 100 facing away from the battery cell group 10 is relatively regular. After the battery module is installed in the battery box 20, the utilization rate of the internal space of the battery box 20 can be improved, which is beneficial to improving the energy density of the battery pack.

[0050] Optionally, as Figures 1 to 4 shown, the end plate 100 further includes a reinforcing rib 150, and the reinforcing rib 150 is arranged at the bottom of the weight reduction groove 140 and / or on the inner wall of the weight reduction groove 140 to improve the overall structural strength of the end plate 100.

[0051] Optionally, as Figures 1 to 4 shown, the centers of the end plate body 120, the weight reduction groove 140, and the avoidance groove 110 overlap, that is to say, the weight reduction groove 140 and the avoidance groove 110 are both located in the central area of the end plate body 120, making the overall weight of the end plate 100 relatively uniform.

[0052] Preferably, as Figures 1 to 4 shown, the number of the reinforcing ribs 150 is multiple, and the multiple reinforcing ribs 150 are distributed outside the avoidance groove 110, and a part of the reinforcing ribs 150 are symmetrically arranged about the first axis ( Figure 3 the x-axis in Figure 3is symmetrically arranged with respect to the y-axis therein), the first axis and the second axis intersect at the center position of the avoidance groove 110, and the first axis, the second axis, and the groove depth direction of the avoidance groove 110 ( Figure 3 the z-direction therein) are perpendicular to each other in pairs. This structural design can not only improve the overall structural strength of the end plate 100, but also improve the uniformity of the structural strength and the uniformity of the weight distribution of the end plate 100.

[0053] This embodiment also provides a battery module, which is relatively easy to clamp and transfer, thereby facilitating the improvement of the production efficiency of the battery pack.

[0054] Specifically, as Figure 4 shown, the battery module includes a battery cell group 10 and the above-mentioned battery module end plate assembly. The battery cell group 10 includes a plurality of battery cells arranged in sequence, and the two end plates 100 of the battery module end plate assembly are respectively clamped at opposite ends of the battery cell group 10.

[0055] The battery module adopts the above-mentioned battery module end plate assembly. In actual production, a clamping device can be used to clamp and transfer the battery module, reducing the transfer difficulty of the battery module and improving the production efficiency of the battery pack.

[0056] This embodiment also provides a battery pack with high production efficiency.

[0057] Specifically, as Figure 5 shown, the battery pack includes a battery box 20 and the above-mentioned battery module. The battery box 20 is provided with a receiving cavity 21, and the battery module is arranged in the receiving cavity 21. The battery pack adopts the above-mentioned battery module. In actual production, a clamping device can be used to clamp and transfer the battery module, reducing the transfer difficulty of the battery module, and thus improving the production efficiency of the battery pack.

[0058] Optionally, as Figure 4 and Figure 5As shown, one side of the battery cell group 10 facing the inner bottom wall of the accommodation cavity 21 is flush with one side of the end plate 100 facing the inner bottom wall of the accommodation cavity 21. This structural design can protect the bottom of the battery cell adjacent to the end plate 100. Specifically, since the battery cell adjacent to the end plate 100 is located on the outermost side of the battery cell group 10, when the battery cells in the battery cell group 10 expand and when the battery pack is being transported, the battery cells on the outermost side of the battery cell group 10 are prone to collide with other components (such as the rib 22 inside the battery box 20, etc.) within the accommodation cavity 21, resulting in the blue film on the outer wall of this battery cell being punctured or scratched, making its insulation and voltage withstand performance not meet the requirements (production requirements, usage requirements, or standard requirements, etc.). In this embodiment, for the provided end plate 100, one side of the end plate 100 facing the inner bottom wall of the accommodation cavity 21 is flush with one side of the battery cell group 10 facing the inner bottom wall of the accommodation cavity 21. The end plate 100 separates the battery cells on the outermost side of the battery cell group 10 from other components (such as the rib 22 inside the battery box 20, etc.) within the accommodation cavity 21, avoiding the collision of the battery cells on the outermost side of the battery cell group 10 with other components (such as the rib 22 inside the battery box 20, etc.) within the accommodation cavity 21, and thus being able to avoid the problem of the blue film on the outer wall of this battery cell being damaged.

[0059] Optionally, as Figure 3 and 5 shown, the inner bottom wall of the accommodation cavity 21 is provided with a rib 22. The side of the end plate 100 facing away from the battery cell group 10 is provided with a step structure 160. The step structure 160 is arranged facing the inner bottom wall of the accommodation cavity 21, and the step structure 160 is lapped with the rib 22. That is, the step tread surface 161 of the step structure 160 abuts against the top wall of the rib 22, and the step vertical surface 162 of the step structure 160 fits against the side wall of the rib 22. When the battery module is installed into the battery box 20, the design of the step structure 160 and the rib 22 is beneficial for quickly positioning the battery module and is beneficial for improving production efficiency.

[0060] Furthermore, as Figure 1 、 Figure 3 and Figure 5 shown, the battery pack further includes long bolts (not shown in the figure). The end plate 100 is provided with mounting holes 180, and the rib 22 is provided with threaded holes (not shown in the figure). The long bolts pass through the mounting holes 180 and are threadedly connected to the threaded holes to fix the battery module within the battery box 20.

[0061] Even further, as Figure 1 and Figure 3 shown, two mounting holes 180 are symmetrically provided on the end plate 100. Each mounting hole 180 corresponds to a long bolt and a threaded hole, improving the stability and reliability of the connection between the end plate 100 and the rib 22.

[0062] In this embodiment, the height of the vertical step surface 162 is 2 mm. Of course, in other embodiments, the height of the vertical step surface 162 can also be other values, which can be determined according to the specific height of the rib 22. Similarly, the width of the step tread surface 161 can be determined according to the specific width of the rib 22, and no further enumeration will be made here.

[0063] Optionally, as Figure 3 shown, the surface of the end plate 100 facing away from the battery cell group 10 is transitioned with the step tread surface 161 of the step structure 160 through the arc surface 170. On the one hand, this structural design can reduce the concentrated stress generated at the position of the arc surface 170. On the other hand, the end plate 100 in this embodiment is made by an injection molding process. This structural design can reduce the probability of burrs generated at the position of the arc surface 170, eliminating the process of scraping burrs after the demolding of the end plate 100, and reducing the mold design difficulty, which is beneficial to reducing the production cost.

[0064] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, rather than limiting the implementation manners of the present application. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present application shall be included within the protection scope of the claims of the present application.

Claims

1. Battery module end plate assembly, characterized in that It includes two end plates (100), and the two end plates (100) are configured to be respectively clamped at opposite ends of the battery cell group (10). Avoidance grooves (110) are provided on both of the two end plates (100), and the openings of the avoidance grooves (110) on the two end plates (100) face away from each other. The two clamping parts of the clamping device can respectively extend into a corresponding avoidance groove (110), and the two clamping parts can respectively abut against the bottom of the corresponding avoidance groove (110).

2. The battery module end plate assembly according to claim 1, wherein The end plate (100) includes an end plate body (120) and a surrounding plate (130), and the surrounding plate (130) is arranged on the end plate body (120). The number of the surrounding plates (130) is at least two, and at least two surrounding plates (130) are sequentially connected end to end to enclose the avoidance groove (110). Or, the surrounding plate (130) is a continuous annular structure, and the surrounding plate (130) encloses to form the avoidance groove (110).

3. The battery module end plate assembly according to claim 2, wherein A weight reduction groove (140) is provided on the end plate body (120), the opening of the weight reduction groove (140) faces away from the battery cell group (10), and at least two surrounding plates (130) are all arranged at the bottom of the weight reduction groove (140).

4. The battery module end plate assembly according to claim 3, wherein The height of the surrounding plate (130) is less than or equal to the depth of the weight reduction groove (140).

5. The battery module end plate assembly according to claim 3, characterized in that, The end plate (100) further includes a reinforcing rib (150), and the reinforcing rib (150) is arranged at the bottom of the weight reduction groove (140) and / or on the inner wall of the weight reduction groove (140).

6. The battery module end plate assembly according to claim 1, characterized in that The cross-sectional area of the notch of the avoidance groove (110) is greater than or equal to 100 mm 2 and less than or equal to 3000 mm 2 .

7. Battery module, characterized in that, It includes a battery cell group (10) and the battery module end plate assembly according to any one of claims 1-6, and the two end plates (100) of the battery module end plate assembly are respectively clamped at opposite ends of the battery cell group (10).

8. Battery pack, characterized in that, It includes a battery box (20) and the battery module according to claim 7. The battery box (20) is provided with a receiving cavity (21), and the battery module is arranged in the receiving cavity (21).

9. The battery pack according to claim 8, characterized in that, The side of the battery cell group (10) facing the inner bottom wall of the receiving cavity (21) is flush with the side of the end plate (100) facing the inner bottom wall of the receiving cavity (21).

10. The battery pack according to claim 8, characterized in that, The inner bottom wall of the receiving cavity (21) is provided with a convex rib (22). The side of the end plate (100) facing away from the battery cell group (10) is provided with a step structure (160). The step structure (160) faces the inner bottom wall of the receiving cavity (21), and the step structure (160) is lapped with the convex rib (22).

11. The battery pack according to claim 10, wherein, The surface of the side of the end plate (100) facing away from the battery cell group (10) and the step tread surface (161) of the step structure (160) are transitioned through an arc surface (170).

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