End plate, battery pack and vehicle

Abstract

The utility model discloses an end plate, a battery pack and a vehicle, and belongs to the technical field of batteries. The end plate is used for being installed in a box body of the battery pack to clamp a battery cell group, the end plate comprises a plate body, the plate body extends in the transverse direction, the plate body is provided with a first end face and a second end face which are opposite in the thickness direction, the first end face faces the battery cell group, and the second end face faces the box body; the first reinforcing rib is arranged on the second end face and at least partially extends in the transverse direction, and the first reinforcing rib is perpendicular to the second end face; the second reinforcing rib is arranged on the second end face and extends in the transverse direction, the second reinforcing rib is arranged on the side, in the height direction of the plate body, of the first reinforcing rib and inclines towards the direction close to the first reinforcing rib in the direction away from the plate body, and the second reinforcing rib is made of an elastically-deformable material. The first reinforcing ribs and the second reinforcing ribs are arranged to abut against the box body, so that the multiple battery cells of the battery cell group are pressed and fixed, the mounting stability is high, the structure is simple, and the cost is low.

Description

Technical Field

[0001] This application belongs to the technical field of battery packs, and particularly relates to an end plate, a battery pack, and a vehicle. Background Art

[0002] For the power battery system of new energy vehicles, generally in the form of modules, the modules are integrally installed in the battery pack. The CTP (Cell to Pack) structure is a technology that directly assembles battery cells into a battery pack, and multiple battery cells in the box are directly pressed and fixed through the end plate. Compared with the traditional module method, CTP eliminates the module design in the intermediate link, but poses higher requirements on the end plate. In practical applications, many structures may have problems such as insufficiently stable fixation of battery cells and increased manufacturing costs due to complex structures. Summary of the Utility Model

[0003] This application aims to solve at least one of the technical problems existing in the prior art. For this reason, this application provides an end plate, a battery pack, and a vehicle, which can press and fix multiple battery cells, have high installation stability, and a simple structure and low cost.

[0004] In a first aspect, this application provides an end plate for being installed in a box body of a battery pack to clamp a battery cell group. The end plate includes:

[0005] A plate body extending along the transverse direction. The plate body has opposite first and second end faces in its thickness direction. The first end face faces the battery cell group and is used to abut against the battery cell group, and the second end face faces the box body;

[0006] A first reinforcing rib provided on the second end face and at least partially extending along the transverse direction. The first reinforcing rib is perpendicular to the second end face;

[0007] A second reinforcing rib provided on the second end face and extending along the transverse direction. The second reinforcing rib is provided on the lower side of the first reinforcing rib and slopes upward in a direction away from the plate body. The second reinforcing rib is made of an elastically deformable material.

[0008] According to the end plate of this application, the first end face is used to tightly abut against the battery cells. By providing the first and second reinforcing ribs on the second end face, the first reinforcing rib directly abuts against the wall surface of the box body to provide sufficient pressing force. The second reinforcing rib is inclined and elastically deformable. When the battery cells are loaded into the box body, it provides more deformation for the adaptive adjustment of the attitude of the battery cells entering the box. Moreover, the elastically deformable second reinforcing rib can effectively overcome the influence of the later expansion force of the battery cells. By the first and second reinforcing ribs abutting against the box body to provide sufficient pressing force to ensure the installation stability of the battery cell group, and the structure is simple and the manufacturing cost is low.

[0009] According to an embodiment of this application, the included angle between the second reinforcing rib and the second end face is 55° - 75°.

[0010] According to an embodiment of the present application, a glue blocking member is provided at the lower end of the second end face for sealing the gap between the plate body and the box body.

[0011] According to an embodiment of the present application, a joint support is provided at the upper end of the second end face.

[0012] According to an embodiment of the present application, at least a part of the first reinforcing rib extends in the up and down direction and is connected to the joint support; and / or,

[0013] The projection of the first reinforcing rib on the second end face is in a closed frame shape.

[0014] According to an embodiment of the present application, the height H1 of the first reinforcing rib in the stacking direction of the battery cell group and the height H2 of the second reinforcing rib in the stacking direction of the battery cell group satisfy:

[0015] H1 < H2.

[0016] In a second aspect, the present application provides a battery pack, which includes:

[0017] A box body;

[0018] A battery cell group, installed in the box body, and the battery cell group includes a plurality of battery cells stacked longitudinally;

[0019] An end plate as described in any one of the first aspect, and an end plate is provided between the end of the battery cell group in the stacking direction and the box body.

[0020] The beneficial effects of the battery pack in the second aspect of the present application are the same as those of the end plate in the first aspect, and will not be elaborated here.

[0021] According to an embodiment of the present application, a boss is provided at the upper end of the surface of the box body for connecting with the end plate, and the boss abuts against the first reinforcing rib;

[0022] A third reinforcing rib is provided on the second end face, the third reinforcing rib extends horizontally and is arranged between the first reinforcing rib and the second reinforcing rib, the third reinforcing rib is located below the boss, and the projection of the third reinforcing rib and the boss in the height direction of the battery pack has an overlapping part.

[0023] According to an embodiment of the present application, the third reinforcing rib is perpendicular to the second end face, and the height H3 of the third reinforcing rib in the stacking direction of the battery cell group and the height H1 of the first reinforcing rib in the stacking direction of the battery cell group satisfy:

[0024] H3 > H1; and / or,

[0025] The height H3 of the third reinforcing rib in the stacking direction of the battery cell group, the height H2 of the second reinforcing rib in the stacking direction of the battery cell group, and the height Ht of the boss satisfy:

[0026] 1 mm ≤ H2 - H3 = Ht ≤ 5 mm.

[0027] In a third aspect, the present application provides a vehicle, characterized in that it includes a battery pack as described in any one of the second aspect, and the battery pack is used to supply electrical energy to the vehicle.

[0028] The additional aspects and advantages of the present application will be partly given in the following description, partly will become apparent from the following description, or will be learned through the practice of the present application. Description of the Drawings

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0030] Figure 1 is a schematic structural diagram of the battery pack provided by the embodiment of the present application;

[0031] Figure 2 is a schematic structural diagram of the box body provided by the embodiment of the present application;

[0032] Figure 3 is a schematic structural diagram of the assembly relationship between the battery cell group and the end plate provided by the embodiment of the present application;

[0033] Figure 4 is one of the schematic structural diagrams of the end plate provided by the embodiment of the present application;

[0034] Figure 5 is another schematic structural diagram of the end plate provided by the embodiment of the present application;

[0035] Figure 6 is a partial schematic structural diagram of the frame provided by the embodiment of the present application;

[0036] Figure 7 is a schematic installation structure diagram of the end plate and the box body provided by the embodiment of the present application;

[0037] Figure 8 is Figure 7 an enlarged schematic diagram of part A in

[0038] Reference Signs:

[0039] 100, battery pack;

[0040] 1, box body; 11, cover body; 12, frame; 121, boss; 13, bottom plate; 14, battery cell compartment;

[0041] 2, battery cell group; 21, battery cell; 211, terminal;

[0042] 3. End plate; 31. Plate body; 311. First end face; 312. Second end face; 313. First reinforcing rib; 314. Second reinforcing rib; 315. Third reinforcing rib; 316. Joint support; 317. Rubber blocking part. Detailed implementation manners

[0043] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application.

[0044] For the power battery system of traditional new energy vehicles, generally, battery cells are assembled into modules, and the modules are assembled into battery packs. Most of the batteries produced by lithium battery manufacturers at home and abroad are in the battery cell-module-battery pack mode, that is, first, single battery cells are produced, and then two or more single battery cells are assembled into a battery module in series or parallel, and then two or more battery modules are combined into a battery pack in series or parallel.

[0045] Generally, the battery cell grouping adopts a module grouping scheme. The module has structural parts such as end plates and side plates. These structural parts press the battery cell group from both ends and the side to fix it into a whole, and this whole, as a small assembly, completes steps such as being put into the box and fixed inside the battery pack. Generally speaking, the structural parts of the battery cell module grouping scheme are relatively numerous, and it can be transported as an independent assembly without relying on the box structure to press it.

[0046] With the emergence of the CTP structure, the battery cell grouping without modules has put forward higher requirements for the end plate. In practical applications, many structures may have problems such as poor heat dissipation effect, insufficient firm fixation of the battery cells, and increased manufacturing cost due to complex structure.

[0047] Based on the above considerations, in order to solve the problems of poor fixing strength of the battery cells in the CTP structure and high manufacturing cost due to complex end plate structure, the present application proposes an end plate. The end of the battery cell group realizes pre-pressing and grouping of the battery cells by borrowing the box structure through the end plate. The end plate includes a plate body, a first reinforcing rib, and a second reinforcing rib. The plate body extends horizontally. The plate body has opposite first and second end faces in its thickness direction. The first end face faces the battery cell group and is used to abut against the battery cell group, and the second end face faces the box body; the first reinforcing rib is arranged on the second end face and at least partially extends horizontally, and the first reinforcing rib is perpendicular to the second end face; the second reinforcing rib is arranged on the second end face and extends horizontally. The second reinforcing rib is arranged below the first reinforcing rib and slopes upward in a direction away from the plate body. The second reinforcing rib is made of an elastically deformable material.

[0048] In the end plate of this structure, it abuts against the battery cell through the first end face. By providing a first reinforcing rib and a second reinforcing rib on the second end face, the first reinforcing rib directly abuts against the wall surface of the box body to provide sufficient pressing force. The second reinforcing rib is inclined and elastically deformable. When the battery cell is installed into the box body, it provides more deformation for the adaptive adjustment of the attitude of the battery cell entering the box. Moreover, the elastically deformable second reinforcing rib can effectively overcome the influence of the later expansion force of the battery cell. The first reinforcing rib and the second reinforcing rib abut against the box body to provide sufficient pressing force to ensure the installation stability of the battery cell group, and the structure is simple and the manufacturing cost is low.

[0049] According to some embodiments of the present application, please refer to Figure 1 and Figure 2 , an embodiment of the present application provides a battery pack 100, adopting a CTP structure. The battery pack 100 includes a box body 1, a battery cell group 2, and an end plate 3.

[0050] The box body 1 is used for the battery cell compartment 14 for installing the battery cell group 2. Among them, the box body 1 may include a box body proper and a cover body 11. The box body proper and the cover body 11 are covered with each other, and the box body proper and the cover body 11 jointly define the battery cell compartment 14 for accommodating the battery cell 21. The box body proper may be a hollow structure with one end open, and the cover body 11 may be a plate-like structure. The cover body 11 is covered on the open side of the box body proper, so that the box body proper and the cover body 11 jointly define the battery cell compartment 14; the box body proper and the cover body 11 may also both be hollow structures with one side open, and the open side of the box body proper is covered on the open side of the cover body 11. Of course, the box body 1 formed by the box body proper and the cover body 11 may be of various shapes, such as a cylinder, a cuboid, etc.

[0051] In one example, please refer to Figure 1 and Figure 2 , the box body proper may include a frame 12 and a bottom plate 13. The bottom plate 13 is arranged at the bottom of the frame 12 and is hermetically connected to the frame 12. The frame 12 can divide the interior of the box body 1 into multiple battery cell compartments 14. When the battery cell group 2 is installed in the battery cell compartment 14, the frame 12 applies a pressing force to the battery cell group 2 to ensure the fixation of the battery cell group 2.

[0052] The battery cell group 2 is installed in the box body 1, and the battery cell group 2 includes a plurality of battery cells 21 stacked.

[0053] The battery cell group 2 is installed in the battery cell compartment 14 of the box body 1. Multiple battery cells 21 can be connected in series, in parallel, or in a combined series-parallel connection. A combined series-parallel connection means that there are both series and parallel connections among multiple battery cells 21. Multiple battery cells 21 can be directly connected in series, in parallel, or in a combined series-parallel connection together, and then the battery cell group 2 formed by multiple battery cells 21 is accommodated in the box body 1. Of course, it is also possible to first accommodate the battery cell group 2 formed by stacking multiple battery cells 21 in the box body 1 and then perform series, parallel, or combined series-parallel connections. The battery pack 100 can also include other structures. For example, the battery pack 100 can also include a busbar component for realizing the electrical connection among multiple battery cells 21.

[0054] Please refer to Figure 3 , and an end plate 3 is provided between the end of the battery cell group 2 in the stacking direction and the box body 1.

[0055] The stacking direction of multiple battery cells 21 in the battery cell group 2 can be set longitudinally. The end of the battery cell group 2 in the stacking direction is provided with an end plate 3. The end plate 3 and the box body 1 jointly apply a pressing force to both ends of the battery cell group 2 in the stacking direction to ensure the installation stability of multiple battery cells 21 in the battery cell group 2. During the assembly process, the end plate 3 is first set at the end of the battery cell group 2 in the stacking direction, and then the end plate 3 and the battery cell group 2 are installed together in the battery cell compartment 14 of the box body 1.

[0056] Please refer to Figure 4 and Figure 5 , according to some embodiments of the present application, the embodiments of the present application also provide an end plate 3, which includes a plate body 31, a first reinforcing rib 313, and a second reinforcing rib 314.

[0057] The plate body 31 extends horizontally. The plate body 31 has opposite first end face 311 and second end face 312 in its thickness direction. The first end face 311 faces the battery cell group 2 and is used for abutting against the battery cell group 2, and the second end face 312 faces the box body 1.

[0058] By setting the plate body 31 to extend horizontally, it is convenient to fit with the end face of the battery cell 21, providing sufficient contact area and pressing force. The first end face 311 of the plate body 31 faces the battery cell group 2 and abuts against the battery cell 21 at the end of the battery cell group 2. The first end face 311 can be set as a flat surface to facilitate full contact between the plate body 31 and the surface of the battery cell 21. The second end face 312 is opposite to the first end face 311 and is set to face the box body 1.

[0059] The first reinforcing rib 313 is provided on the second end face 312 and at least partially extends horizontally. The first reinforcing rib 313 is perpendicular to the second end face 312.

[0060] By setting at least part of the first reinforcing rib 313 to extend transversely, it is convenient to increase the coverage of the first reinforcing rib 313, facilitate the full contact between the first reinforcing rib 313 and the box body 1, improve the overall structural strength and stability, and enhance the bending resistance of the plate body 31 in the transverse direction. The first reinforcing rib 313 is perpendicular to the second end face 312, and one end of the first reinforcing rib 313 away from the second end face 312 is used to abut against the box body 1. The pressing force applied by the box body 1 can be transmitted to the plate body 31 through the first reinforcing rib 313 and then to the battery cell group 2. The perpendicular setting ensures the effective transmission of the pressing force and improves the installation stability of the battery cell group 2.

[0061] The second reinforcing rib 314 is arranged on the second end face 312 and extends transversely. The second reinforcing rib 314 is arranged on the lower side of the first reinforcing rib 313 and slopes upward in the direction away from the plate body 31. The second reinforcing rib 314 is made of an elastically deformable material.

[0062] By setting the second reinforcing rib 314 to extend transversely, it is convenient to increase the coverage of the second reinforcing rib 314, facilitate the full contact between the second reinforcing rib 314 and the box body 1, and similarly improve the overall structural strength and stability, and enhance the bending resistance of the plate body 31 in the transverse direction. Among them, the second reinforcing rib 314 is arranged on the lower side of the first reinforcing rib 313 in the height direction of the plate body 31. The first reinforcing rib 313 and the second reinforcing rib 314 are arranged at intervals to improve the overall structural strength of the end plate 3, increase the contact area between the end plate 3 and the box body 1, have more pressing force transmission paths, higher stability, and stronger pressing force.

[0063] Among them, the second reinforcing rib 314 is arranged at an angle with respect to the second end face 312. The second reinforcing rib 314 slopes upward in the direction away from the plate body 31 and toward the first reinforcing rib 313, that is, upward. And the second reinforcing rib 314 is made of an elastically deformable material. When installing the battery cell group 2 and the end plate 3, first clamp the battery cell group 2 and the end plate 3 together and then install them into the box body 1.

[0064] In actual implementation, taking the box body of the box 1 as a hollow structure with an upper opening as an example, generally along the height direction of the battery cell 21, that is, the height direction of the plate body 31, it is installed from the opening of the box body downward to the bottom plate 13. The second reinforcing rib 314 contacts the box 1 first. By arranging the second reinforcing rib 314 obliquely, the second reinforcing rib 314 can play a guiding role. Through the elastic deformation of the second reinforcing rib 314, more deformation is provided for the adaptive adjustment of the attitude of the battery cell 21 when it enters the box. The installation is smoother, the stability after installation is higher, and the assembly accuracy is higher. After being completely assembled into the box 1, the first reinforcing rib 313 also abuts against the box body and is located on the side close to the opening of the box body, providing a stable pressing force on the upper part of the entire battery cell group 2. The second reinforcing rib 314 elastically abuts against the box 1, and can also provide a stable pressing force on the lower part of the battery cell group 2. And during the subsequent expansion process of the battery cell 21, it can adaptively deform to ensure the stability of the pressing and the overall structural strength.

[0065] According to the end plate 3 of the embodiment of the present application, the first end face 311 is used to tightly abut against the battery cell 21. By arranging the first reinforcing rib 313 and the second reinforcing rib 314 on the second end face 312, the first reinforcing rib 313 directly abuts against the wall surface of the box 1 to provide sufficient pressing force. The second reinforcing rib 314 is arranged obliquely and can be elastically deformed. When the battery cell 21 is loaded into the box 1, more deformation is provided for the adaptive adjustment of the attitude of the battery cell 21 when it enters the box. And the elastically deformable second reinforcing rib 314 can effectively overcome the influence of the later expansion force of the battery cell 21. By the first reinforcing rib 313 and the second reinforcing rib 314 abutting against the box 1 to provide sufficient pressing force to ensure the installation stability of the battery cell group 2, and the structure is simple and the manufacturing cost is low.

[0066] According to the battery pack 100 of the embodiment of the present application, the beneficial effects of the battery pack 100 are the same as those of the above-mentioned end plate 3, and will not be elaborated here.

[0067] According to some embodiments of the present application, the first reinforcing rib 313, the second reinforcing rib 314 and the plate body 31 can be integrally formed. The end plate 3 can be made of plastic material and is manufactured by an injection molding process as a whole. By integrally forming the first reinforcing rib 313, the second reinforcing rib 314 and the plate body 31, the manufacturing is simple and the cost is low, and the integrated structure has higher strength, is more stable in use, has insulation effect, and is light in weight to meet the requirements of lightweight design.

[0068] Please refer to Figure 7 and Figure 8 , according to some embodiments of the present application, the included angle α between the second reinforcing rib 314 and the second end face 312 can be 55° - 75°.

[0069] By limiting the included angle range between the second reinforcing rib 314 and the second end face 312, the second reinforcing rib 314 can be effectively deformed during the installation process to correct the assembly. After the assembly is completed, there is sufficient abutting force between the second reinforcing rib 314 and the box body 1 to ensure the pressing effect on the battery cell group 2.

[0070] Among them, the value range of the included angle α between the second reinforcing rib 314 and the second end face 312 is [55°, 75°]. Exemplarily, α can take values of 55°, 60°, 65°, 70°, 75° or other angles between 55° - 75°, and specific limitations are not made here.

[0071] Please refer to FIG. 7. According to some embodiments of the present application, a glue blocking member 317 is provided at the lower end of the second end face 312 for sealing the gap between the plate body 31 and the box body 1.

[0072] It can be understood that when installing the battery cell group 2, glue is first applied to the bottom of the box body 1. When the battery cell group 2 is pressed downwards, the glue will overflow under the pressure of the battery cell 21. By providing the glue blocking member 317 at the lower end of the second end face 312, it is possible to prevent the glue from overflowing upwards along the gap between the end plate 3 and the box body 1, thereby ensuring the bonding effect at the bottom. The glue blocking member 317 can be a foam or a sealing strip, etc., and can be fixed to the second end face 312 by an adhesive method.

[0073] Please refer to Figure 5 , according to some embodiments of the present application, a plurality of second reinforcing ribs 314 are provided along the up and down direction.

[0074] By providing a plurality of second reinforcing ribs 314, the overall assembly stability is improved. Among them, the plurality of second reinforcing ribs 314 can be arranged at intervals along the height direction of the plate body 31 to increase the coverage range of the reinforcing ribs. The number of the second reinforcing ribs 314 can be two, three or more than three, and the specific number is not limited here. In one example, as Figure 5 shown, two second reinforcing ribs 314 are provided.

[0075] Please refer to Figure 5 , according to some embodiments of the present application, a joint support 316 is provided at the upper end of the second end face 312.

[0076] The joint support 316 can meet the clamping of the high and low voltage connectors and facilitate the installation of the high and low voltage connectors. By arranging the joint support 316 at the upper end in the height direction of the plate body 31, the position of the joint support 316 is located away from the bottom plate 13, so as to facilitate the wiring of the high and low voltage connectors and facilitate the misalignment setting with the part of the box body 1 for abutting against the end plate 3, and avoid interference between the joint support 316 and the box body 1.

[0077] Taking one end of the terminal 211 of the battery cell 21 located in the height direction of the battery cell 21 as an example, the joint support 316 is located at one end of the plate body 31 close to the terminal 211.

[0078] Please refer to Figure 5 , according to some embodiments of the present application, at least a part of the first reinforcing rib 313 extends in the up-and-down direction and is connected to the joint support 316.

[0079] By setting at least a part of the first reinforcing rib 313 to extend in the height direction of the plate body 31, the bending resistance of the plate body 31 in the height direction is enhanced. Moreover, a part of the first reinforcing rib 313 extends laterally and a part extends in the height direction, thereby increasing the coverage area of the first reinforcing rib 313 to improve the contact area between the first reinforcing rib 313 and the box body 1 and improve the stability of the abutment. Among them, the part of the first reinforcing rib 313 extending in the height direction is connected to the joint support 316 because the joint support 316 and the part of the box body 1 for pressing the battery cell 21 are arranged in a dislocation manner to ensure that the first reinforcing rib 313 can be in full contact with the box body 1.

[0080] Please refer to Figure 5 , according to some embodiments of the present application, the projection of the first reinforcing rib 313 on the second end face 312 is in a closed frame shape.

[0081] The projection of the first reinforcing rib 313 on the second end face 312 can be in a closed frame shape, which not only has better overall stability, higher structural strength, but also has a large coverage area to ensure that the first reinforcing rib 313 is in full contact with the box body 1. Among them, the projection of the first reinforcing rib 313 on the second end face 312 can be a rectangular frame, a square frame, or a frame in the shape of a Chinese character 'Ri' or a frame in the shape of a Chinese character 'Tian', etc., which is not specifically limited herein. Exemplarily, in Figure 5 , the projection of the first reinforcing rib 313 on the second end face 312 is in a frame in the shape of a Chinese character 'Ri' extending laterally.

[0082] In some embodiments, the end of the first reinforcing rib 313 away from the plate body 31 can be arranged in a flat surface to ensure that the first reinforcing rib 313 fits tightly against the surface of the box body 1 and improve the pressing effect.

[0083] Please refer to Figure 7 and Figure 8 , according to some embodiments of the present application, the height H1 of the first reinforcing rib 313 in the stacking direction of the battery cell group 2 and the height H2 of the second reinforcing rib 314 in the stacking direction of the battery cell group 2 satisfy:

[0084] H1 < H2.

[0085] It can be understood that the stacking direction of the battery cell group 2 is the thickness direction of the plate body 31, that is, the longitudinal direction. Since the second reinforcing rib 314 can be elastically deformed, by setting the height of the second reinforcing rib 314 in the thickness direction of the plate body 31 to be greater than the height of the first reinforcing rib 313, the second reinforcing rib 314 can be fully contacted with the box body 1 to ensure that sufficient pressing force can be provided and the overall stability can be improved.

[0086] Please refer to Figure 5 , according to some embodiments of the present application, the joint supports 316, the first reinforcing ribs 313 and the second reinforcing ribs 314 are provided in multiple groups spaced apart in the transverse direction on the second end face 312, and each group of joint supports 316, the first reinforcing ribs 313 and the second reinforcing ribs 314 correspond to each other in the up and down direction.

[0087] The first reinforcing ribs 313, the second reinforcing ribs 314 and the joint supports 316 are all provided in multiple groups spaced apart in the transverse direction to form gaps between each group, so that when the end plate 3 and the battery cell group 2 are installed, they can be clamped in the gaps by a clamping tool to fix the end plate 3 and the battery cell group 2, which is convenient for the assembly of the battery cell group 2 and the end plate 3.

[0088] Among them, the number of groups of the joint supports 316, the first reinforcing ribs 313 and the second reinforcing ribs 314 is not limited here and is designed according to actual needs.

[0089] In one example, the joint supports 316, the first reinforcing ribs 313 and the second reinforcing ribs 314 are provided in two groups, and the two joint supports 316 are convenient for installing high-voltage and low-voltage connectors respectively, and the two groups can form a gap for the tool to clamp.

[0090] In another example, one end plate 3 can correspond to two battery cell groups 2 distributed in the transverse direction, that is, the ends of the two battery cell groups 2 distributed in the transverse direction are provided with the same end plate 3. The joint supports 316, the first reinforcing ribs 313 and the second reinforcing ribs 314 can be provided with four joint supports 316 to respectively correspond to the high-voltage and low-voltage connectors of the two battery cell groups 2 and form three gaps to improve the clamping stability of the tool.

[0091] Please refer to Figure 6 , according to some embodiments of the present application, a boss 121 is provided at the upper end of the surface of the box body 1 for connecting with the end plate 3, and the boss 121 abuts against the first reinforcing rib 313.

[0092] It is understandable that the frame 12 of the box body 1 is used to abut against the end plate 3 and is hereinafter referred to as the box body 1. The surface of the box body 1 that abuts against the end plate 3 is provided with a boss 121. The boss 121 protrudes from the surface where it is located and is directly opposite to the first reinforcing rib 313. It is understandable that the surface of the boss 121 facing the plate body 31 is a plane, so that the first reinforcing rib 313 can stably contact with the boss 121 to improve the pressing force. The boss 121 can be set at the upper end, that is, the end away from the bottom plate 13 of the box body 1, so that when the first reinforcing rib 313 is in hard contact with the boss 121, a stable pressing force is provided to the upper end of the battery cell group 2, that is, the end away from the bottom plate 13, so that the battery cell group 2 is not easy to loosen and has high stability.

[0093] Among them, the second reinforcing rib 314 and the boss 121 can be staggered in the up and down direction, that is, the height direction of the battery pack 100. During the assembly process, the second reinforcing rib 314 can pass through the boss 121 from top to bottom by utilizing the characteristics of elastic deformation. After the assembly is completed, the second reinforcing rib 314 abuts against the surface of the lower part of the box body 1 where the boss 121 is not provided. Because the height of the second reinforcing rib 314 in the stacking direction of the battery cell group 2 is greater than that of the first reinforcing rib 313, the first reinforcing rib 313 and the second reinforcing rib 314 are both kept tightly against the box body 1, ensuring that each position in the height direction of the entire end plate 3 applies a stable clamping force to the battery cell group 2.

[0094] The second end surface 312 is provided with a third reinforcing rib 315 , which is provided between the first reinforcing rib 313 and the second reinforcing rib 314 . The third reinforcing rib 315 is located at the lower side of the boss 121 , and the projection of the reinforcing rib and the boss 121 in the height direction of the battery pack 100 has an overlapping portion.

[0095] Among them, the boss 121 can be a rectangular boss 121 extending in the transverse direction, and the third reinforcing rib 315 can extend in the transverse direction. After the assembly is completed, the third reinforcing rib 315 is just located on the lower side of the boss 121, that is, the side facing the bottom plate 13, so that the third reinforcing rib 315 can be clamped and limited with the lower edge of the boss 121. While the end plate 3 is subjected to the longitudinal clamping force, the limitation in the up and down directions is realized, which can limit and correct the assembly posture and spatial position of the end plate 3, and further improve the stability of the overall structure.

[0096] Furthermore, the spacing between the third reinforcing rib 315 and the boss 121 in the vertical direction can be 1 mm-2 mm, and the overall stability is improved by limiting the spacing between the third reinforcing rib 315 and the boss 121. Exemplarily, the spacing between the third reinforcing rib 315 and the boss 121 in the height direction of the plate body 31 can be 1 mm, 1.2 mm, 1.5 mm, 1.6 mm, 1.7 mm, 2 mm, or other values between 1 mm and 2 mm.

[0097] Please refer to Figure 7 and Figure 8 According to some embodiments of the present application, the third reinforcing rib 315 is perpendicular to the second end face 312. The height H3 of the third reinforcing rib 315 in the stacking direction of the battery cell group 2 and the height H1 of the first reinforcing rib 313 in the stacking direction of the battery cell group 2 can satisfy:

[0098] H3>H1.

[0099] By setting the height of the third reinforcing rib 315 to be greater than the height of the first reinforcing rib 313, when the first reinforcing rib 313 abuts against the boss 121, the third reinforcing rib 315 can extend to one side of the boss 121 to limit the position of the boss 121.

[0100] Please refer to Figure 7 and Figure 8 According to some embodiments of the present application, the height H3 of the third reinforcing rib 315 in the stacking direction of the battery cell group 2, the height H2 of the second reinforcing rib 314 in the stacking direction of the battery cell group 2, and the height Ht of the boss 121 can satisfy:

[0101] 1mm≤H2 - H3 = Ht≤5mm.

[0102] It can be understood that the height of the second reinforcing rib 314 in the stacking direction of the battery cell group 2 is greater than that of the third reinforcing rib 315, so as to reduce the assembly difficulty and protect the third reinforcing rib 315 from damage.

[0103] By limiting the height difference between the second reinforcing rib 314 and the third reinforcing rib 315 in the stacking direction of the battery cell group 2, when the second reinforcing rib 314 abuts against the box body 1, at least part of the third reinforcing rib 315 can be engaged and limited with the boss 121. It should be noted that in the case of H2 - H3 = Ht, since the second reinforcing rib 314 will generate a certain deformation when it contacts the box body 1 and receives a pressing force, the third reinforcing rib 315 can play a role in limiting the position.

[0104] Wherein, the value range of H2 - H3 can be [1mm, 5mm]. Exemplarily, H2 - H3 can take values of 1mm, 1.5mm, 2mm, 3mm, 4mm, 5mm or other values between 1mm and 5mm, and no specific limitation is made here.

[0105] Further, in some embodiments, the value range of H2-H3 can be [1 mm, 2 mm]. Exemplarily, H2-H3 can take values of 1 mm, 1.2 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2 mm, or other values between 1 mm and 2 mm, which are not specifically limited herein. By further defining the height difference between the second reinforcing rib 314 and the third reinforcing rib 315, that is, the height of the boss 121, the space occupied by the component in the stacking direction is reduced, and the space layout is optimized.

[0106] An embodiment of the present application further provides a vehicle, including the battery pack 100 in any of the above technical solutions, and the battery pack 100 is used to provide electrical energy for the vehicle.

[0107] It can be understood that since the vehicle of the embodiment of the present application includes the battery pack 100 in any of the above technical solutions, it has the technical features and technical effects of the battery pack 100 in any of the above technical solutions, which will not be elaborated herein.

[0108] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0109] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application.

[0110] In the description of the present application, the "first feature", "second feature" may include one or more of such features.

[0111] In the description of the present application, the meaning of "a plurality" is two or more.

[0112] In the description of the present application, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween.

[0113] In the description of the present application, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature.

[0114] In the description of this specification, the description of reference terms such as "an embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0115] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An end plate for being installed in a box body of a battery pack to clamp a battery cell group, characterized in that The end plate includes: A plate body extending transversely, the plate body having opposite first and second end faces in its thickness direction, the first end face facing the battery cell group and being used to abut against the battery cell group, and the second end face facing the box body; A first reinforcing rib provided on the second end face and at least partially extending transversely, the first reinforcing rib being perpendicular to the second end face; A second reinforcing rib provided on the second end face and extending transversely, the second reinforcing rib being provided below the first reinforcing rib and sloping upward in a direction away from the plate body, and the second reinforcing rib being made of an elastically deformable material.

2. The end plate according to claim 1, wherein The included angle between the second reinforcing rib and the second end face is 55°-75°.

3. The end plate according to claim 1, characterized in that, A glue-blocking member is provided at the lower end of the second end face for sealing the gap between the plate body and the box body.

4. The end plate according to any one of claims 1-3, characterized in that A joint support is provided at the upper end of the second end face.

5. The end plate according to claim 4, wherein At least a part of the first reinforcing rib extends in the up-and-down direction and is connected to the joint support; and / or, The projection of the first reinforcing rib on the second end face is in a closed frame shape.

6. The end plate according to any one of claims 1-3, characterized in that, The height H1 of the first reinforcing rib in the stacking direction of the battery cell group and the height H2 of the second reinforcing rib in the stacking direction of the battery cell group satisfy: H1 < H2.

7. A battery pack, characterized in that, Including: A box body; A battery cell group installed in the box body, the battery cell group including a plurality of battery cells stacked longitudinally; The end plate according to any one of claims 1-6, the end plate being provided between the end of the battery cell group in the stacking direction and the box body.

8. The battery pack according to claim 7, wherein A boss is provided at the upper end of the surface of the box body for connecting with the end plate, and the boss abuts against the first reinforcing rib; A third reinforcing rib is provided on the second end face, the third reinforcing rib being provided between the first reinforcing rib and the second reinforcing rib, the third reinforcing rib being located below the boss, and the reinforcing rib and the projection of the boss in the height direction of the battery pack have an overlapping part.

9. The battery pack according to claim 8, characterized in that, The third reinforcing rib is perpendicular to the second end face, the height H3 of the third reinforcing rib in the stacking direction of the battery cell group and the height H1 of the first reinforcing rib in the stacking direction of the battery cell group satisfy: H3 > H1; and / or, The height H3 of the third reinforcing rib in the stacking direction of the battery cell group, the height H2 of the second reinforcing rib in the stacking direction of the battery cell group and the height Ht of the boss satisfy: 1mm ≤ H2 - H3 = Ht ≤ 5mm.

10. A vehicle, characterized in that, Including the battery pack according to any one of claims 7-9, the battery pack being used to supply electrical energy to the vehicle.

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