Module end plate and battery pack

Abstract

The utility model provides a module end plate and a battery pack. The module end plate is arranged at the end of a battery module in a battery pack shell and comprises an end plate body, a first channel penetrating through the end plate body in the height direction and a second channel communicated with the first channel are formed in the end plate body, and the first channel is communicated with the second channel. The second channel is perpendicular to the end plate body and extends outwards from the first channel; the limiting part comprises an abutting push rod arranged in the first channel in a sliding mode and a limiting column arranged in the second channel in a sliding mode; the side, facing the second channel, of the abutting-against rod is sunken to form an inclined abutting-against face. According to the module end plate disclosed by the utility model, through the arrangement of the propping push rod and the limiting column in the limiting part, after the battery module is arranged in the battery pack shell, the propping push rod is driven to enable the limiting column to be inserted into the limiting hole of the battery pack shell, so that the restraint of the battery module in the height direction is formed, and the fixing effect of the battery module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and particularly relates to a module end plate. The utility model also relates to a battery pack provided with the above module end plate. Background Art

[0002] With the rapid development of new energy technologies, the battery pack, as the core component of electric vehicles, has been increasingly valued for its safety and stability. Currently, the battery pack generally includes a battery pack housing and battery modules disposed in the battery pack housing. Among them, module end plates are usually provided at both ends of the battery module, and the battery module is fixedly connected to the battery pack housing through the module end plates.

[0003] The module end plates of the existing battery modules usually adopt a bolt connection method. The module end plates can pass through bolts and are screwed to the battery pack housing through the bolts, so as to fix the module end plates to the battery pack housing, thereby realizing the fixation of the battery module. However, in the existing fixation method of fixing the battery module through bolts, when the battery pack bumps during long-term driving with the vehicle, the bolts used to fix the battery module are likely to become loose due to vibration, resulting in a decrease in the fixation effect of the battery module. Summary of the Utility Model

[0004] In view of this, the utility model aims to propose one to improve the fixation effect of the battery module.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A module end plate is disposed at the end of a battery module in a battery pack housing, and includes:

[0007] A end plate body, on which a first channel penetrating the end plate body in the height direction and a second channel communicating with the first channel are provided, and the second channel extends perpendicularly outward from the first channel with respect to the end plate body;

[0008] A limiting part, including a push rod sliding in the first channel and a limiting column sliding in the second channel; an inclined abutting surface is recessed on one side of the push rod facing the second channel; when the push rod moves downward in the first channel, the limiting column is pushed by the abutting surface and moves toward the battery pack housing, so that one end of the limiting column is inserted into a limiting hole on the battery pack housing.

[0009] Further, the limiting hole is provided on a cross beam of the battery pack housing.

[0010] Further, vertical surfaces connected to the abutting surface are formed at the upper and lower ends of the abutting surface.

[0011] Furthermore, a chamfered structure is formed at one end of the limiting column abutting against the abutting surface.

[0012] Furthermore, an inclined guide surface is provided on one side of the bottom of the module end plate close to the battery pack shell.

[0013] Furthermore, a clamping groove is provided on the outer side surface of the end plate body, and the clamping groove passes through the top end of the end plate body along the height direction.

[0014] Furthermore, a plurality of reinforcing ribs are provided on the outer side surface of the end plate body in a horizontal and vertically staggered manner.

[0015] Furthermore, the first channels are configured to be multiple and spaced apart along the length direction of the end plate body, and each of the first channels is connected to the second channel; each of the second channels is provided with the limiting column, and the push rods are configured to be multiple and correspond one to one to each of the first channels.

[0016] Furthermore, any of the first channels is connected to a plurality of the second channels spaced apart along the length direction of the first channel, and each of the second channels is provided with the limiting column; and the push rod is provided with a plurality of abutment surfaces corresponding one to one with each of the limiting columns.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The module end plate described in the utility model, through the arrangement of the push rod and the limit column in the limit part, enables the push rod to drive the limit column to insert into the limit hole of the battery pack shell after the battery module is loaded into the battery pack shell, so as to constitute a constraint on the battery module in the height direction. Compared with the prior art, it can prevent the connection effect between the battery module and the battery pack shell from being reduced due to vibration, thereby improving the fixing effect of the battery module.

[0019] In addition, the limiting hole is set on the crossbeam of the battery pack shell. The crossbeam itself has good structural strength. The module end plate is connected to the crossbeam, which can ensure the crossbeam's bearing effect on the battery module, thereby improving the fixation effect of the battery module in the battery pack. The upper and lower ends of the abutment surface are connected to the vertical surface, which can leave a certain amount of space for the limiting column, and push the limiting column when the limiting column is pushed and inserted into the limiting hole, ensuring that the limiting column remains in the limiting hole of the crossbeam.

[0020] In addition, a chamfer structure is formed at one end of the limiting post, which can reduce the resistance of the pushing rod to push the limiting post, improve the smoothness of the pushing rod to push the limiting post, reduce the wear between the limiting post and the abutting surface, and improve the reliability. A guiding surface is provided at the bottom of the end plate, and this guiding surface can guide the two cross beams to ensure that the battery module can smoothly enter between the two cross beams, thus facilitating the assembly of the battery module. A clamping groove is provided on the outer side surface of the end plate body, which can avoid the interference between the clamping jaws of the assembly tooling and the cross beam during the assembly process of the battery module, thus facilitating the assembly of the battery module.

[0021] Furthermore, reinforcing rib plates are provided on the outer side surface of the end plate body, which can improve the structural strength of the module end plate. By providing a plurality of first channels and second channels, as well as corresponding multiple pushing rods, limiting posts, and abutting surfaces, the number of fixed points for the module end plate to connect to the cross beam can be increased, thereby improving the fixing effect of the battery module.

[0022] Another object of the present invention is to provide a battery pack, in which a plurality of battery modules are provided. The end of the battery module is provided with the module end plate as described above, and the battery module is fixed on the battery pack housing through the limiting portion on the module end plate.

[0023] The battery pack and / or the module end plate of the present invention have the same technical effects as the prior art and will not be elaborated herein. Description of the Drawings

[0024] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the module end plate according to Embodiment 1 of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall structure of the end plate body according to Embodiment 1 of the present invention;

[0027] Figure 3 It is a schematic diagram of the overall structure of the pushing rod according to Embodiment 1 of the present invention;

[0028] Figure 4 For the present invention Figure 1 The cross-sectional view at the A-A position in;

[0029] Figure 5 It is a schematic diagram of the connection between the module end plate and the battery pack housing according to Embodiment 1 of the present invention;

[0030] Figure 6Structural schematic diagram of the battery module according to Embodiment 1 of the present utility model;

[0031] Figure 7 Structural schematic diagram of the battery module according to Embodiment 1 of the present utility model loaded in the battery pack housing;

[0032] Explanation of reference numerals:

[0033] 1. End plate body; 101. First channel; 102. Second channel; 103. Guiding surface; 104. Clamping groove; 105. Reinforcing rib plate;

[0034] 2. Pushing rod; 201. Contact surface; 202. Vertical surface;

[0035] 3. Limit post; 301. Chamfer structure;

[0036] 4. Battery module; 5. Battery cell; 6. Battery pack housing;

[0037] 7. Cross beam; 701. Limit hole. Detailed implementation manners

[0038] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0039] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures, technologies, etc. are proposed to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0040] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; 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. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0042] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0043] Embodiment 1

[0044] This embodiment relates to a module end plate, which is arranged at the end of the battery module 4 in the battery pack housing 6. In terms of the overall structure, as Figure 1 、 Figure 2 and Figure 3 shown, the module end plate of this embodiment includes an end plate body 1 and a limiting part.

[0045] Among them, a first channel 101 penetrating the end plate body 1 in the height direction is provided on the end plate body 1, and a second channel 102 communicating with the first channel 101, and the second channel 102 extends outward perpendicular to the end plate body 1 from the first channel 101. The limiting part includes a push rod 2 slidably arranged in the first channel 101 and a limiting column 3 slidably arranged in the second channel 102. An inclined abutting surface 201 is formed by the depression on one side of the push rod 2 facing the second channel 102.

[0046] When the push rod 2 moves downward in the first channel 101, as Figure 4 and Figure 5 shown, the limiting column 3 is pushed by the abutting surface 201 to move towards the battery pack housing 6, so that one end of the limiting column 3 is inserted into the limiting hole 701 on the battery pack housing 6, so that the limiting column 3 is located in the limiting hole 701 and the second channel 102, and a constraint on the module end plate and the battery module 4 is formed in the height direction.

[0047] As described above, through the arrangement of the push rod 2 and the limiting column 3 in the limiting part, after the battery module 4 is installed in the battery pack housing 6, the push rod 2 is driven to insert the limiting column 3 into the limiting hole 701 of the battery pack housing 6 to form a constraint on the battery module 4 in the height direction. Compared with the prior art, it can prevent the connection effect between the battery module 4 and the battery pack housing 6 from decreasing due to vibration, thereby improving the fixing effect of the battery module 4.

[0048] Based on the above overall introduction, specifically, as Figure 6As shown in the figure, the battery module 4 of this embodiment includes a battery cell group 5 composed of a plurality of battery cells 5, and module end plates respectively disposed on two opposite sides of the battery cell group 5. In order to improve the compactness of the battery module 4, so as to be easily installed in the battery pack, reduce the volume of the battery pack, and reduce the weight of the battery pack, the battery cell group 5 of this embodiment is composed of a plurality of horizontally and vertically arranged battery cells 5 bonded to each other. At the same time, the module end plates are also connected by bonding to the side surfaces of the battery cell group 5 to simplify the structures such as cable ties and housings in the battery module 4 and improve the compactness of the battery module 4. Moreover, a plurality of module end plates can be arranged on one side surface of the battery cell group 5 to increase the connection points between the battery module 4 and the battery pack housing 6, thereby improving the fixing effect of the battery module 4.

[0049] In addition, as Figure 7 shown, the battery pack housing 6 usually has a cross beam 7 for strengthening the structural strength of the battery pack housing 6. In order to further improve the fixing effect of the battery module 4, the limiting hole 701 of this embodiment is provided on the cross beam 7 of the battery pack housing 6. It can be understood that the cross beam 7, as a component for strengthening the structural strength of the battery pack housing 6, itself has good structural strength. By setting the limiting hole 701 on the cross beam 7 and connecting the module end plate to the cross beam 7, the bearing effect of the cross beam 7 on the battery module 4 can be ensured, thereby improving the fixing effect of the battery module 4 in the battery pack.

[0050] During specific implementation, for the battery module 4 loaded in the battery pack housing 6, the gap between the module end plate thereon and the cross beam 7 is small or there is no gap, so as to ensure that the limiting post 3 can be inserted into the limiting hole 701 on the cross beam 7. In addition, the battery pack housing 6 of this embodiment is provided with a plurality of spaced cross beams 7. Module end plates are provided at both ends of the battery module 4, and the battery module 4 is disposed between two cross beams 7 and connected to the two cross beams 7.

[0051] In this embodiment, as Figure 3 shown, vertical surfaces 202 connected to the abutting surface 201 are formed at the upper and lower ends of the abutting surface 201. The vertical surface 202 located at the lower section of the abutting surface 201 can leave a certain accommodation space for the limiting post 3, preventing it from being pushed by the pushing surface when the limiting post 3 is not pushed. And the vertical surface 202 located at the lower section of the abutting surface 201 can laterally push the limiting post 3 when the limiting post 3 is pushed and inserted into the limiting hole 701, ensuring that the limiting post 3 remains in the limiting hole 701 of the cross beam 7.

[0052] In order to improve the smoothness of the push rod 2 pushing the limit post 3, a chamfer structure 301 is formed at one end of the limit post 3 in contact with the contact surface 201 in this embodiment. Through the setting of the chamfer structure 301, the resistance of the push rod 2 pushing the limit post 3 can be reduced, the smoothness of the push rod 2 pushing the limit post 3 can be improved, and the setting of the chamfer structure 301 can reduce the module wear between the limit post 3 and the contact surface 201, improving the reliability of the limiting part.

[0053] In order to facilitate the installation of the battery module 4 between the two cross beams 7 in the battery pack housing 6, a guiding surface 103 which is inclined is provided on one side of the bottom of the module end plate close to the battery pack housing 6 in this embodiment. When the battery module 4 is clamped by the assembly work and installed between the two cross beams 7 of the battery pack housing 6 from top to bottom, the guiding surface 103 can guide the two cross beams 7, ensuring that the battery module 4 can smoothly enter between the two cross beams 7, thus facilitating the assembly of the battery module 4.

[0054] Since the gap between the module end plate and the cross beam 7 is small, in order to facilitate the clamping of the battery module 4 by the assembly tooling and install the battery module 4 in the battery pack housing 6, a clamping groove 104 is provided on the outer side surface of the end plate body 1 in this embodiment, and the clamping groove 104 penetrates through the top end of the end plate body 1 along the height direction. By providing the clamping groove 104, the clamping groove 104 can accommodate the clamping jaws of the assembly tooling. During the assembly process of the battery module 4, interference between the clamping jaws of the assembly tooling and the cross beam 7 can be avoided, thus facilitating the assembly of the battery module 4. In specific implementation, the clamping grooves 104 in this embodiment are configured as multiple arranged transversely along the module end plate.

[0055] In order to improve the structural strength of the module end plate, a plurality of reinforcing rib plates 105 which are horizontally and vertically staggered are provided on the outer side surface of the end plate body 1 in this embodiment. Through the setting of the reinforcing rib plates 105, the structural strength of the module end plate can be improved, thus ensuring the stability of the connection between the battery module 4 and the battery pack housing 6 and improving the fixing effect of the battery module 4.

[0056] In order to increase the fixing points between the module end plate and the battery pack housing 6 and improve the fixing effect of the battery module 4, the first channels 101 in this embodiment are configured as multiple spaced along the length direction of the end plate body 1, and each first channel 101 communicates with the second channel 102. A limit post 3 is provided in each second channel 102, and the push rods 2 are configured as multiple corresponding to each first channel 101 one by one. By providing a plurality of first channels 101 and a plurality of limit posts 3 located in the second channels 102, the number of limit posts 3 can be increased, and the fixing points of the module end plate for connecting the cross beam 7 can be increased in the transverse direction, thus improving the fixing effect of the battery module 4. In this embodiment, the first channels 101 are set as four spaced ones to ensure the fixing effect between the battery module 4 and the end plate.

[0057] In addition, each first channel 101 of this embodiment is connected to a plurality of second channels 102 which are arranged at intervals along the length direction of the first channel 101, and a limiting post 3 is provided in each second channel 102. A plurality of abutting surfaces 201 corresponding to the limiting posts 3 one by one are provided on the abutting push rod 2. By arranging a plurality of second channels 102 and the limiting posts 3 therein on a first channel 101, the number of the limiting posts 3 is further increased, and the fixing points for connecting the cross beam 7 are increased in the height direction for the module end plate, further improving the fixing effect of the battery module 4.

[0058] In summary, for the module end plate structure of this embodiment, through the arrangement of the abutting push rod 2 and the limiting post 3 in the limiting portion, after the battery module 4 is installed in the battery pack housing 6, the abutting push rod 2 is driven to insert the limiting post 3 into the limiting hole 701 of the battery pack housing 6, so as to form a constraint on the battery module 4 in the height direction. Compared with the prior art, it can prevent the connection effect between the battery module 4 and the battery pack housing 6 from decreasing due to vibration, thereby improving the fixing effect of the battery module 4 and having good practicability.

[0059] Embodiment 2

[0060] This embodiment relates to a battery pack. In terms of the overall structure, a plurality of battery modules 4 are provided in the battery pack, and a module end plate as described in Embodiment 1 is provided at the end of the battery module 4. The battery module 4 is fixed on the battery pack housing 6 through the limiting portion on the module end plate.

[0061] For the battery pack of this embodiment, through the arrangement of the module end plate, the fixing effect of the battery module 4 in the battery pack housing 6 can be improved, and the stability of the battery module 4 in the battery pack can be improved, so as to improve the quality of the battery pack.

[0062] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A module end plate is disposed at the end of a battery module within a battery pack housing, characterized in that, Comprising: An end plate body, on which there is a first channel penetrating the end plate body in the height direction, and a second channel communicating with the first channel, and the second channel extends outward perpendicular to the end plate body from the first channel; A limiting part, including a pushing rod slidably arranged in the first channel and a limiting column slidably arranged in the second channel; An inclined abutting surface is formed by a depression on one side of the pushing rod facing the second channel; When the pushing rod moves downward in the first channel, the limiting column is pushed by the abutting surface and moves towards the battery pack housing, so that one end of the limiting column is inserted into a limiting hole on the battery pack housing.

2. The module end plate according to claim 1, wherein: The limiting hole is arranged on a cross beam of the battery pack housing.

3. The module end plate according to claim 1, wherein: Vertical surfaces connected to the abutting surface are formed at the upper and lower ends of the abutting surface.

4. The module end plate according to claim 1, wherein: A chamfer structure is formed at one end of the limiting column abutting against the abutting surface.

5. The module end plate according to claim 1, wherein: A guiding surface is arranged obliquely on one side of the bottom of the module end plate close to the battery pack housing.

6. The module end plate according to claim 1, wherein: A clamping groove is arranged on the outer side surface of the end plate body, and the clamping groove penetrates the top end of the end plate body in the height direction.

7. The module end plate according to claim 1, wherein: A plurality of reinforcing rib plates intersecting horizontally and vertically are arranged on the outer side surface of the end plate body.

8. The module end plate according to any one of claims 1 to 7, wherein: The first channels are configured to be a plurality arranged at intervals along the length direction of the end plate body, and each of the first channels communicates with the second channel; The limiting columns are arranged in each of the second channels, and the pushing rods are configured to be a plurality corresponding to each of the first channels one by one.

9. The module end plate according to claim 8, wherein: Any one of the first channels communicates with a plurality of the second channels arranged at intervals along the length direction of the first channel, and the limiting columns are arranged in each of the second channels; A plurality of abutting surfaces corresponding to each of the limiting columns one by one are arranged on the pushing rod.

10. A battery pack, wherein: A plurality of battery modules are arranged in the battery pack, and the ends of the battery modules are provided with the module end plate according to any one of claims 1 to 9; The battery module is fixed on the battery pack housing through the limiting part on the module end plate.

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