End plate and battery module

Abstract

The utility model provides an end plate and battery module relates to battery technical field, the end plate includes the plate body, the plate body has the first wall portion and the second wall portion that are spaced apart along the first direction, the both ends of first wall portion are connected with the side wall, first wall portion and second wall portion are connected through the side wall, and the inside forms the cavity, the cavity has the gap, the gap is located in the cavity. The notch is used for being detachably connected with the fixing base, and a rib is arranged in the cavity. Hoisting holes are formed in the first wall part, the two hoisting holes are formed in a spaced mode in the second direction, and the second direction is perpendicular to the first direction; the problems that an existing end plate is multiple in machining procedure, large in error risk and high in production cost are solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an end plate and a battery module. Background Technology

[0002] Currently, battery modules are composed of multiple stacked cells, end plates, and other connecting structures, with the end plates located on both sides of the cell stacking direction.

[0003] For example, patent CN218182364U discloses a module end plate and a battery module. A first through hole is formed through the side of the end plate, and a groove is formed at least at one end of the upper and lower ends of the end plate. A tooling is inserted through at least one groove and passes through the lower surface of the first through hole. A pin is inserted into the first through hole, and the lifting tooling is fixed in place using a tenon and mortise joint for lifting. This end plate, with openings on its side and at least one end for lifting, requires work on at least two surfaces during manufacturing, resulting in numerous processing steps, high error risk, and high production costs. Utility Model Content

[0004] In view of this, this utility model proposes an end plate and battery module, which can solve the problems of multiple processing steps, high error risk and high production cost of existing end plates.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides an end plate, including a plate body, the plate body having a first wall portion and a second wall portion spaced apart along a first direction, the two ends of the first wall portion being connected to side walls, the first wall portion and the second wall portion being connected through the side walls, and a cavity being formed inside, the cavity having a notch, the notch being used for detachable connection with a fixing seat, and ribs being provided inside the cavity;

[0007] The first wall portion is provided with lifting holes, and two lifting holes are spaced apart along a second direction, which is perpendicular to the first direction.

[0008] Based on the above technical solutions, preferably, a limiting block is provided on the first wall portion.

[0009] More preferably, two limiting blocks are provided, and the two limiting blocks are respectively aligned with the two lifting holes;

[0010] The hoisting hole has multiple hole edges, and the hole edges are connected to form the opening of the hoisting hole. The limiting block is disposed on any of the hole edges of the hoisting hole that is aligned with it.

[0011] Based on the above technical solution, preferably, the two limiting blocks are respectively disposed on the side of the two lifting holes facing each other, and the limiting blocks extend along a third direction; the third direction, the second direction and the first direction are perpendicular to each other.

[0012] Based on the above technical solutions, preferably, the cavity includes a first cavity and a second cavity, and the ribs include a plurality of first ribs and a plurality of second ribs disposed in the first cavity, wherein the first ribs and the second ribs are both inclined and the inclination directions are opposite.

[0013] In the second direction, the first rib and the second rib are arranged alternately, and the end of the first rib is spaced apart from the end of the adjacent second rib.

[0014] Based on the above technical solutions, preferably, the cavity includes a first cavity and a second cavity, the notch is formed on the second cavity, and the rib includes a third rib disposed in the second cavity. The third rib is provided at intervals along the second direction, and the third rib extends along the third direction.

[0015] The first wall portion has a disassembly hole along the first direction, and the disassembly hole communicates with the second cavity.

[0016] More preferably, the notch includes a bottom edge notch formed in the first wall portion and a top edge notch formed in the second wall portion, wherein the height of the top edge of the top edge notch is different from the height of the bottom edge of the bottom edge notch.

[0017] More preferably, an intermediate rib is provided between the two third ribs, the intermediate rib extending along the third direction, and both the intermediate rib and the third rib are flush with the bottom edge of the notch.

[0018] Based on the above technical solution, preferably, the plate body has mounting through holes on both sides in the second direction, and the mounting through holes are used to install fastening bolts.

[0019] This utility model also provides a battery module, including:

[0020] A battery pack consists of multiple stacked battery cells;

[0021] The aforementioned end plates are provided in two parts, and are respectively located on both sides of the battery pack;

[0022] Two insulating sheets, the insulating sheets being located between the end plate and the battery cell; and

[0023] A fixing seat is provided on the notch of the end plate.

[0024] The end plate and battery module of this utility model have the following advantages over the prior art:

[0025] (1) The cavity structure formed by the first wall, the second wall, and the side wall, as well as the ribs set in the cavity, significantly improves the overall strength and rigidity of the end plate, effectively bearing the mechanical stress and vibration of the battery pack during transportation and use, and preventing the end plate from deforming or being damaged. The setting of two lifting holes facilitates the connection and operation of lifting equipment, improves the lifting and handling efficiency of the battery pack, and ensures the safety and stability of the lifting process. The two lifting holes are both opened in the first wall of the plate, which facilitates production and processing. They can be completed in one operation. Compared with the existing end plates where the lifting holes are opened on different wall surfaces, which requires processing multiple surfaces during the preparation of the lifting holes, increases the number of processes and steps, and results in long processing time and low production efficiency;

[0026] (2) By opening the limiting block, disassembly hole and hoisting hole in the first wall, the preparation of three parts can be completed by processing one side of the plate, which greatly reduces the machining time, improves manufacturing efficiency and reduces manufacturing cost. In addition, the limiting block limits the cable tie, which simplifies the machining operation, reduces the machining time, improves manufacturing efficiency and reduces manufacturing cost compared with the existing structure of limiting the cable tie with the limiting groove. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a perspective view of the end plate of this utility model;

[0029] Figure 2 This is a perspective view of the end plate of this utility model from another direction;

[0030] Figure 3 for Figure 1 Top view;

[0031] Figure 4 for Figure 1 The main view;

[0032] Figure 5 This is a schematic diagram of the battery module of this utility model;

[0033] Figure 6 for Figure 5 The main view.

[0034] Figure label:

[0035] 1. Plate; 101. First wall portion; 102. Second wall portion; 103. Side wall;

[0036] 2. Cavity; 21. First cavity; 22. Second cavity;

[0037] 3. Rib; 31. First rib; 32. Second rib; 33. Third rib; 34. Intermediate rib;

[0038] 4. Gap; 41. Bottom edge gap; 42. Top edge gap;

[0039] 5. Lifting hole; 6. Limiting block; 7. Disassembly hole; 8. Installation through hole;

[0040] 9. Installing components; 91. Fastening bolts; 92. Washers;

[0041] 10. Fixing base; 11. Buckle. Detailed Implementation

[0042] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0043] like Figures 1 to 4 As shown, this utility model provides an end plate, which includes a plate body 1. The plate body 1 has a first wall portion 101 and a second wall portion 102 spaced apart along a first direction. The two ends of the first wall portion 101 are connected to side walls 103. The first wall portion 101 and the second wall portion 102 are connected through the side walls 103, and a cavity 2 is formed inside. The cavity 2 has a notch 4, which is used for detachable connection with a fixing seat 10. Ribs 3 are provided inside the cavity 2. The first wall portion 101 is provided with a lifting hole 5. Two lifting holes 5 are spaced apart along a second direction, which is perpendicular to the first direction.

[0044] The cavity 2 structure formed by the first wall portion 101, the second wall portion 102, and the side wall 103, along with the ribs 3 provided within the cavity 2, significantly improves the overall strength and rigidity of the end plate. This effectively withstands the mechanical stress and vibration experienced by the battery pack during transportation and use, preventing deformation or damage to the end plate. Secondly, the cavity 2 structure reduces material usage while maintaining strength, achieving a lightweight design, making it particularly suitable for weight-sensitive applications such as electric vehicles. Furthermore, the notch 4 on the cavity 2 allows for detachable connection of the end plate to the mounting base 10, facilitating installation and maintenance, simplifying the assembly and disassembly process of the battery pack, and improving production efficiency and maintenance convenience.

[0045] The two lifting holes 5 on the first wall portion 101 are spaced apart along the second direction, facilitating the connection and operation of lifting equipment, improving the efficiency of battery pack lifting and handling, and ensuring the safety and stability of the lifting process. Having both lifting holes 5 located on the first wall portion 101 of the plate body 1 facilitates manufacturing and processing, allowing for completion in a single operation. This contrasts with existing end plates where the lifting holes 5 are located on different wall surfaces, requiring processing on multiple surfaces during hole preparation, increasing steps and processing time, and reducing production efficiency. Furthermore, processing multiple surfaces requires ensuring the relative position and dimensional accuracy of each surface, placing higher demands on equipment and operator skills, increasing the risk of errors; multi-surface processing also requires more equipment, tools, and time, significantly increasing production costs.

[0046] The end plate integrates multiple functional structures, including cavity 2, ribs 3, notch 4, and lifting hole 5, achieving a multi-functional integrated design. This reduces the use of additional components, simplifies the structural design of the battery pack, and lowers manufacturing costs. The flexible structural design of the end plate can adapt to the needs of battery packs of different sizes and types, improving its versatility and applicability, and facilitating large-scale production and application.

[0047] Furthermore, the cavity 2 structure increases airflow space, optimizes the heat dissipation performance of the end plate, and helps the battery pack dissipate heat during charging and discharging, thereby improving the battery pack's safety and lifespan. The overall structure of the end plate is compact and aesthetically pleasing, while the cavity 2 structure also provides some protection for the internal components, enhancing the battery pack's appearance and protection performance.

[0048] like Figures 1 to 4As shown, in some embodiments, a limiting block 6 is provided on the first wall portion 101. The limiting block 6 is used to cooperate with the cable tie to limit the cable tie. Specifically, the cable tie includes steel cable ties and plastic cable ties arranged at intervals. The bottom end of the steel cable tie cooperates with the top end of the limiting block 6, and the top end of the plastic cable tie cooperates with the bottom end of the limiting block 6. A single limiting block 6 allows simultaneous cooperation with both steel and plastic cable ties. Furthermore, the limiting block 6 offers significant processing advantages compared to traditional limiting grooves. The limiting block 6 can be achieved through simple machining, while limiting grooves typically require more complex machining processes, such as milling or wire cutting, increasing manufacturing difficulty and cost. In addition, both the limiting block 6 and the lifting hole 5 are located on the first wall portion 101, making production and preparation easier.

[0049] Two limiting blocks 6 are provided, each corresponding to one of the two lifting holes 5. Each lifting hole 5 has multiple hole edges, which are connected to form the opening of the lifting hole 5. The limiting blocks 6 are positioned on any of the hole edges of the corresponding lifting hole 5. The presence of two limiting blocks 6 further enhances the limiting effect on the cable ties. By placing the limiting blocks 6 at the hole edges of the lifting holes 5, the structural strength of the lifting holes 5 can be improved.

[0050] The two limiting blocks 6 are respectively disposed on the sides of the two lifting holes 5 facing each other, and the limiting blocks 6 extend along a third direction; the third direction, the second direction, and the first direction are perpendicular to each other. The limiting blocks 6 extend along the third direction, and the steel cable ties and plastic steel straps are spaced apart along the third direction, which not only ensures reliable limiting of the cable ties, but also further improves the safety during the lifting process.

[0051] like Figures 1 to 4 As shown, in some embodiments, the cavity 2 includes a first cavity 21 and a second cavity 22. The ribs 3 include a plurality of first ribs 31 and a plurality of second ribs 32 disposed within the first cavity 21. The first ribs 31 and the second ribs 32 are both inclined in opposite directions. In the second direction, the first ribs 31 and the second ribs 32 are arranged alternately, and the ends of the first ribs 31 are spaced apart from the ends of their adjacent second ribs 32. The alternating arrangement of the first ribs 31 and the second ribs 32 ensures the structural strength and deformation resistance of the plate 1 in the first cavity 21.

[0052] Furthermore, the ends of the first rib 31 and the adjacent ends of the second rib 32 are spaced apart. At this time, the projection shape of the portion enclosed by one of the first ribs 31, the adjacent second rib 32, the first wall portion 101 and the second wall portion 102 is a parallelogram. Compared with the layout with a projection shape of triangle, this can further improve the structural strength, ensure the ability to effectively resist external impacts and vibrations, and ensure the service life of the battery pack.

[0053] Compared to a layout with a triangular projection shape, the end plate provided in this embodiment can reduce the number of first ribs 31 and second ribs 32 used in the same size first cavity 21, thereby reducing raw materials, increasing structural strength, and being more conducive to extrusion molding.

[0054] like Figures 1 to 4 As shown, in some embodiments, the cavity 2 includes a first cavity 21 and a second cavity 22. The notch 4 is formed in the second cavity 22. The rib 3 includes a third rib 33 disposed within the second cavity 22. Two third ribs 33 are spaced apart along the second direction and extend along the third direction. The first wall portion 101 has a disassembly hole 7 along the first direction, which communicates with the second cavity 22. The disassembly hole 7 allows for the disassembly of the fixing seat 10 mounted on the notch 4, facilitating operation and reducing maintenance costs and time. The third rib 33 enhances the structural strength and deformation resistance of the plate 1 at the second cavity 22, ensuring the service life of the battery pack.

[0055] Of course, the opening depth of the disassembly hole 7 is not limited in this embodiment. The opening depth of the disassembly hole 7 can be equal to the thickness of the first wall portion 101; or the opening depth of the disassembly hole 7 can be greater than the thickness of the first wall portion 101 and less than the width of the first cavity 21 in the first direction; or the depth of the disassembly hole 7 can be greater than the thickness of the plate 1 in the first direction, in which case the disassembly hole 7 is a through hole. In this embodiment, the opening depth of the disassembly hole 7 is equal to the thickness of the first wall portion 101, which not only enables the disassembly of the fixing seat 10 but also reduces machining time, increases end plate manufacturing efficiency, and reduces manufacturing costs.

[0056] In some embodiments, the notch 4 includes a bottom edge notch 41 formed in the first wall portion 101 and a top edge notch 42 formed in the second wall portion 102. The height of the top edge of the top edge notch 42 is different from the height of the bottom edge of the bottom edge notch 41. The above is based on the bottom of the plate 1 as the height reference and the third direction as the height direction. The bottom edge of the bottom edge notch 41 and the top edge of the top edge notch 42 are both matched with the corresponding positions of the bottom of the fixing base 10. By setting the height of the bottom edge and the height of the top edge to be different, it is convenient to install and prevents the installation from being reversed.

[0057] In this embodiment, the first cavity 21 and the second cavity 22 are formed side by side along the second direction. In a cross-section perpendicular to the third direction, the first cavity 21 can be located on the left and the second cavity 22 can be located on the right. The notch 4 is provided on the second cavity 22, in which case the notch 4 is located on the right. Alternatively, the first cavity 21 can be located on the right and the second cavity 22 on the left, with the notch 4 provided on the second cavity 22, in which case the notch 4 is located on the left. This end plate can be positioned with the notch 4 on the left or right side of the plate 1 according to different application scenarios and usage requirements. Compared with end plates with notches 4 on both the left and right sides, the end plate in this embodiment can reduce machining time, improve the structural strength of the plate 1, facilitate observation of the notch 4 position, and improve assembly efficiency.

[0058] like Figures 1 to 4 As shown, in some embodiments, an intermediate rib 34 is provided between the two third ribs 33. The intermediate rib 34 extends along the third direction, and both the intermediate rib 34 and the third ribs 33 are flush with the bottom edge of the notch 4. The intermediate rib 34 is provided to further enhance the structural strength of the second cavity 22. In addition, by making both the intermediate rib 34 and the third rib 33 flush with the bottom edge of the notch 4, it is also convenient for manufacturing and processing. The intermediate rib 34 can also provide support for the fixing seat 10.

[0059] In some embodiments, the detachable connection between the notch 4 and the fixing seat 10 includes screw engagement, snap-fit ​​engagement, or pin hole engagement. In this embodiment, two snap-fits 11 are spaced apart at the bottom of the fixing seat 10. The two snap-fits 11 are respectively engaged with two third ribs 33 at the alignment of the disassembly hole 7. The fixing seat 10 and the plate 1 are fixedly connected by the snap-fits 11 and the third ribs 33. At the disassembly hole 7, the operator can cancel the snap-fits 11 and the third ribs 33 to remove the fixing seat 10 from the plate 1.

[0060] like Figures 1 to 6 As shown, in some embodiments, the plate 1 has mounting through holes 8 on both sides in the second direction, which are used to install fastening bolts 91. Specifically, the end plate is assembled onto the battery box via a mounting assembly 9, which includes fastening bolts 91. The fastening bolts 91 are fitted into the mounting through holes 8, and their ends are screwed into the battery box, thereby detachably connecting the end plate to the battery box. Of course, a washer 92 can also be provided between the fastening bolts 91 and the end plate. The washer 92 increases the contact area, reduces the pressure between the fastening bolts 91 and the end plate surface, and prevents damage. Furthermore, the washer 92 can increase friction, preventing the fastening bolts 91 from loosening due to vibration or load, ensuring the reliability of the connection.

[0061] In summary, the embodiments of this application provide an end plate that, by all of the lifting hole 5, the limiting block 6, and the disassembly hole 7 are provided on the first wall portion 101 of the plate body 1, can complete the preparation of three components by processing one side of the plate body 1, which greatly reduces machining time, improves manufacturing efficiency, reduces manufacturing costs, and solves the problems of multiple processing steps, high error risk, and high production costs of existing end plates.

[0062] In existing battery modules, the end plates are generally made of cast iron. However, to meet the requirements of higher energy density and lightweight design of battery packs, the end plates need to be reduced in weight. To achieve this weight reduction, changing the material of the end plate from cast iron to aluminum profiles can significantly reduce its weight, thus meeting the lightweight requirements. However, end plates made of aluminum profiles are often more expensive than those made of cast iron. In this embodiment, the end plate structure is optimized, reducing the amount of raw materials and machining time, effectively lowering manufacturing costs and increasing the strength of the end plate.

[0063] like Figures 1 to 6 As shown, this utility model also provides a battery module, including a battery pack, end plates, insulating sheets, and a mounting base 10. The battery pack includes multiple stacked cells; two end plates are provided, located on opposite sides of the battery pack, and the end plates are any of the end plates described above; the insulating sheets are located between the end plates and the cells, serving for electrical insulation and thermal isolation; the mounting base 10 is disposed on the notch 4 of the end plate, serving to fix the end plate and the battery pack. This battery module design not only improves the overall performance of the battery pack but also enhances its safety and reliability, making it suitable for various demanding application scenarios.

[0064] During installation, the end plate and insulating sheet are fixed to the battery cell, and the busbar of the battery pack is fixed at the notch 4 of the end plate by the fixing seat 10. The steel cable tie and plastic cable tie are tied to the end plates on both sides, and the battery module is fixed to the battery box by passing the fastening bolt 91 and the washer 92 through the mounting through hole 8 of the end plate.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An end plate characterized by, The plate body (1) has a first wall part (101) and a second wall part (102) arranged at intervals along a first direction, both ends of the first wall part (101) are connected with a side wall (103), the first wall part (101) and the second wall part (102) are connected through the side wall (103), and a cavity (2) is formed inside, the cavity (2) has a notch (4) for detachable connection with a fixing seat (10), and a rib (3) is arranged in the cavity (2). A lifting hole (5) is formed in the first wall part (101), and two lifting holes (5) are arranged at intervals along a second direction perpendicular to the first direction.

2. The end plate of claim 1, wherein: A limiting block (6) is arranged on the first wall part (101).

3. The end plate of claim 2, wherein: Two limiting blocks (6) are arranged, and the two limiting blocks (6) are respectively arranged opposite to the two lifting holes (5). The lifting hole (5) has a plurality of hole edges, each hole edge is connected to form an opening of the lifting hole (5), and the limiting block (6) is arranged on any hole edge of the lifting hole (5) opposite to it.

4. The end plate of claim 3, wherein: The two limiting blocks (6) are respectively arranged on the hole edges on the side opposite to the two lifting holes (5), and the limiting blocks (6) extend along a third direction; the third direction, the second direction and the first direction are perpendicular to each other.

5. The end plate of claim 1, wherein: The cavity (2) includes a first cavity (21) and a second cavity (22), the rib (3) includes a plurality of first ribs (31) and a plurality of second ribs (32) arranged in the first cavity (21), and the first ribs (31) and the second ribs (32) are both arranged obliquely and the oblique directions are opposite. In the second direction, the first ribs (31) and the second ribs (32) are arranged alternately, and the end of the first rib (31) is arranged at intervals with the end of the second rib (32) adjacent to it.

6. The end plate of claim 1, wherein The cavity (2) includes a first cavity (21) and a second cavity (22), the notch (4) is formed in the second cavity (22), the rib (3) includes a third rib (33) arranged in the second cavity (22), the third rib (33) is arranged at intervals along the second direction, and the third rib (33) extends along a third direction. The first wall part (101) is provided with a dismounting hole (7) along the first direction, and the dismounting hole (7) communicates with the second cavity (22).

7. The end plate of claim 6, wherein The notch (4) includes a bottom edge defect (41) formed in the first wall part (101) and a top edge defect (42) formed in the second wall part (102), and the height of the top edge of the top edge defect (42) is different from the height of the bottom edge of the bottom edge defect (41).

8. The end plate of claim 7, wherein An intermediate rib (34) is arranged between the two third ribs (33), the intermediate rib (34) extends along the third direction, and the intermediate rib (34) and the third rib (33) are flush with the bottom edge of the notch (4).

9. The end plate of claim 1, wherein: The plate body (1) is provided with a mounting through hole (8) on both sides of the second direction, and the mounting through hole (8) is used for mounting a fastening bolt (91).

10. A battery module, characterized by: Comprise: A battery pack comprising a plurality of stacked battery cells; The end plate of any one of claims 1 to 9, wherein two end plates are provided and located on both sides of the battery pack, respectively; Two insulating sheets located between the end plate and the battery cell; and A fixing seat (10) provided on the notch (4) of the end plate.

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