Battery endplate and battery pack having it

Abstract

This utility model discloses a battery end plate and a battery pack having the same. The battery end plate is formed by die casting and is adapted to span the same end of multiple rows of battery modules. The battery end plate has at least a first battery region and a second battery region along its length. The battery end plate has an inner end face and an outer end face on opposite sides along its thickness direction. The outer end face of the battery end plate has reinforcing ribs arranged in a grid pattern along the transverse and longitudinal directions. The reinforcing ribs correspond to the positions of the first battery region and the second battery region. The battery end plate according to this utility model embodiment has advantages such as high structural strength and resistance to deformation.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a battery end plate and a battery pack having the same. Background Technology

[0002] Battery end plates are an essential component of batteries. They work in conjunction with steel strips to constrain the dimensions of the battery module and secure it during battery pack assembly for production operations.

[0003] In related technologies, battery end plates are usually covered on the end face of the battery module. The battery end plates are processed by sheet metal bending and sheet metal stamping, and the end plates are processed into plate-shaped structures. However, for battery end plates with multiple rows, the length of the battery end plates is relatively large, which can easily cause the end plates to deform under stress. The battery end plates are prone to deformation when subjected to external forces. Utility Model Content

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a battery end plate that has advantages such as high structural strength and resistance to deformation.

[0005] To achieve the above objectives, an embodiment of the present invention provides a battery end plate, wherein the battery end plate is integrally formed by die casting and is adapted to span the same end of multiple rows of battery modules. The battery end plate has at least a first battery region and a second battery region along its length direction. The battery end plate has an inner end face and an outer end face respectively constructed on opposite sides along its thickness direction. The outer end face of the battery end plate is constructed with reinforcing ribs arranged in a grid pattern along the transverse and longitudinal directions. The positions of the reinforcing ribs correspond to the positions of the first battery region and the second battery region.

[0006] According to an embodiment of this utility model, the battery end plate has reinforcing ribs arranged in a grid pattern along the transverse and longitudinal directions on its outer end face, which can effectively disperse the external load and stress applied to the battery end plate. The grid-structured reinforcing ribs increase the effective load-bearing area, enabling the force on the battery end plate to be evenly transferred to the surface of the battery module, avoiding material damage or deformation caused by localized stress concentration. Simultaneously, the presence of the reinforcing ribs provides additional support, covering both the first and second battery areas. This means that the main stress-bearing areas of the entire battery end plate are strengthened, making it less prone to deformation of the internal battery module when the battery end plate is under stress, thus improving the overall structural strength. Furthermore, by using die-casting technology, the battery end plate can form a uniform and dense material structure, reducing the possibility of bubbles or micro-cracks, thereby improving the overall structural strength of the battery end plate.

[0007] Therefore, the battery end plate according to the present invention has advantages such as high structural strength and prevention of deformation.

[0008] According to some specific embodiments of the present invention, the battery end plate has an upper edge and a lower edge respectively on opposite sides along the height direction; wherein, the upper edge is provided with an insulating mounting hole suitable for installing an insulating component, the position of the insulating mounting hole corresponds to the first battery region and the second battery region, the insulating mounting hole in the first battery region is suitable for installing an insulating component that is insulated from the battery in the first battery region, and the insulating mounting hole in the second battery region is suitable for installing an insulating component that is insulated from the battery in the second battery region.

[0009] According to some specific embodiments of the present invention, the insulating mounting holes of the first battery region are arranged in pairs and are respectively located on both sides of one of the longitudinal reinforcing ribs of the first battery region; the insulating mounting holes of the second battery region are arranged in pairs and are respectively located on both sides of one of the longitudinal reinforcing ribs of the second battery region.

[0010] According to some specific embodiments of the present invention, the battery end plate has an upper edge and a lower edge on opposite sides along the height direction; wherein, the lower edge has a reference mounting hole, which is used as a positioning reference for the visual recognition device or for mounting on the liquid cooling plate.

[0011] According to some specific embodiments of the present invention, the battery end plate has frame ribs on opposite sides along its length, and the mesh-like reinforcing ribs are formed between the frame ribs on both sides; wherein, the frame ribs are provided with limiting grooves extending along the flat side, and the limiting grooves are adapted to accommodate steel strips to bind the battery end plate to the end of the battery module.

[0012] According to some specific embodiments of the present invention, the battery end plate has frame ribs on opposite sides along its length, and the battery end plate has partition ribs between the first battery area and the second battery area; wherein, the frame ribs and the partition ribs are each provided with tooling alignment grooves on the outer end face of the battery end plate, and the tooling alignment grooves are adapted for a robotic arm to extend into in order to stack battery modules.

[0013] According to some specific embodiments of the present invention, the inner end face of the battery end plate is constructed with a filling groove corresponding to the position of the tooling alignment groove. The filling groove and the alignment groove are interconnected. The filling groove is suitable for installing insulating buffer material on the inner end face of the battery end plate.

[0014] According to some specific embodiments of this utility model, the battery end plate is provided with identification marks in the grid formed by the reinforcing ribs.

[0015] According to some specific embodiments of this utility model, the battery end plate is an aluminum alloy casting, and the reinforcing rib is flush with the outer end face of the battery end plate.

[0016] According to a second aspect embodiment of the present invention, the battery pack includes: a multi-row battery module; a battery end plate according to the above embodiment of the present invention, the battery end plate being mounted at the end of the multi-row battery module, and the battery end plate located at one end of the battery module being adapted to span across the multi-row battery module; a steel strip, the steel strip being bound to the outer periphery of the battery end plate and the battery module; and an insulating member, the insulating member being mounted on the battery end plate.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the battery end plate installation according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the battery end plate according to an embodiment of the present utility model; Figure 3 This is a structural schematic diagram of the outer end face of the battery end plate according to an embodiment of the present utility model; Figure 4 This is a structural schematic diagram of the inner end face of the battery end plate according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the upper edge of the battery end plate according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the lower edge of the battery end plate according to an embodiment of the present utility model; Figure 7 This is a side view of the battery end plate according to an embodiment of the present utility model.

[0019] Figure label: Battery end plate 1, inner end face 100, outer end face 200, upper edge 300, lower edge 400, frame rib 500. Rib 600, filling groove 101, reinforcing rib 210, limiting groove 211, identification mark 212, insulating mounting hole 301. Reference mounting hole 401, tooling alignment groove 501, First battery area 10, second battery area 20, steel strip 30, insulating component 11. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0023] In the description of this utility model, "multiple" means two or more, and "several" means one or more.

[0024] The battery end plate 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0025] like Figures 1-7 As shown, the battery end plate 1 is integrally formed by die casting. The battery end plate 1 is suitable for spanning the same end of multiple rows of battery modules. The battery end plate 1 has at least a first battery region 10 and a second battery region 20 along its length. The battery end plate 1 has an inner end face 100 and an outer end face 200 respectively on opposite sides along its thickness direction. The outer end face 200 of the battery end plate 1 is provided with reinforcing ribs 210 arranged in a grid pattern along the transverse and longitudinal directions. The positions of the reinforcing ribs 210 correspond to those of the first battery region 10 and the second battery region 20.

[0026] For example, the battery end plate is a rectangular integral structure. The end plate has an inner end face and an outer end face along the thickness direction. The inner end face is in direct contact with the battery module in the internal space. The outer end face is constructed with reinforcing ribs 210. The width of the horizontally extending reinforcing ribs 210 and the vertically extending reinforcing ribs 210 is equal, both being 2mm~3mm.

[0027] According to an embodiment of the present invention, the battery end plate 1 has reinforcing ribs 210 arranged in a grid pattern along the transverse and longitudinal directions on its outer end face 200, which can effectively disperse the external load and stress applied to the battery end plate 1. The grid structure of the reinforcing ribs 210 increases the effective load-bearing area, enabling the force on the battery end plate 1 to be evenly transferred to the surface of the battery module, avoiding material damage or deformation caused by localized stress concentration. Simultaneously, the presence of the reinforcing ribs 210 provides additional support. The reinforcing ribs 210 cover the first battery region 10 and the second battery region 20, meaning that the main stress-bearing areas of the entire battery end plate 1 are strengthened. When the battery end plate 1 is under stress, the internal battery module is less prone to deformation, improving the overall structural strength. Furthermore, by using die-casting technology, the battery end plate 1 can form a uniform and dense material structure, thereby improving the overall structural strength of the battery end plate 1.

[0028] Therefore, the battery end plate 1 according to the present utility model embodiment has advantages such as high structural strength and prevention of deformation.

[0029] In some optional embodiments of this utility model, such as Figure 2 and Figure 5 As shown, the battery end plate 1 has an upper edge 300 and a lower edge 400 on opposite sides along its height. The upper edge 300 has an insulating mounting hole 301 suitable for mounting the insulating component 11. The position of the insulating mounting hole 301 corresponds to the first battery region 10 and the second battery region 20. The insulating mounting hole 301 in the first battery region 10 is suitable for installing an insulating component that is insulated from the battery in the first battery region, and the insulating mounting hole 301 in the second battery region 20 is suitable for installing an insulating component that is insulated from the battery in the second battery region. That is, the insulating component 11 in the first battery region 10 is insulated from the battery in the first battery region 10, and the insulating component 11 in the second battery region 20 is insulated from the battery in the second battery region 20.

[0030] The position of the insulating mounting hole 301 corresponds to the first battery area 10 and the second battery area 20, serving as a precise positioning reference. During production, the battery end plate 1 is fixed in a defined position, and the production line can locate and identify the insulating mounting hole 301 according to a predetermined program, thereby fixing the battery module to the first battery area 10 and the second battery area 20. Furthermore, in the preset program, the insulating mounting hole 301 provides a visually identifiable positioning reference, facilitating laser cleaning of the battery module terminals and laser welding of the aluminum bar and battery module terminals. This improves production efficiency and processing accuracy, ensuring welding quality. By installing the insulating component 11 in the first battery area 10 and the second battery area 20, the electrical connection between the batteries can be effectively isolated, preventing short circuits and leakage, ensuring the safety and stability of the battery module.

[0031] In some optional embodiments of this utility model, such as Figure 2 As shown, the insulating mounting holes 301 in the first battery region 10 are arranged in pairs and are located on both sides of one of the longitudinal reinforcing ribs 210 in the first battery region 10. The insulating mounting holes 301 in the second battery region 20 are also arranged in pairs and are located on both sides of one of the longitudinal reinforcing ribs 301 in the second battery region 20. Furthermore, the insulating mounting holes 301 in the first battery region 10 and the second battery region 20 can be arranged in multiple pairs, and the insulating mounting holes 301 can be square slots.

[0032] The insulating mounting holes 301 are arranged in pairs and located on both sides of the reinforcing ribs 301 in the first battery region 10 and the second battery region 20, with one of the longitudinal reinforcing ribs 301 directly opposite the bottom of the insulating base. When the insulating base is under force, the bottom is well supported, which can improve the stability and insulation performance of the insulating component 11, ensure good electrical isolation between batteries, and prevent short circuits and leakage risks. The paired distribution of the insulating mounting holes 301 near the reinforcing ribs 210 of the structure helps to disperse the force applied to the battery end plate 1, improving its compressive strength and durability.

[0033] In some optional embodiments of this utility model, such as Figure 2 and Figure 6 As shown, the battery end plate 1 has an upper edge 300 and a lower edge 400 on opposite sides along the height direction. The lower edge 400 is provided with a reference mounting hole 401, which is adapted to pass a fastener through to mount the battery end plate 1 to the liquid cooling plate, and / or the reference mounting hole 401 is used as a positioning reference for the visual recognition device.

[0034] In addition, the upper edge 400 may also be provided with reference mounting holes 401, which are spaced apart between pairs of insulating mounting holes 301. The reference mounting holes 401 serve as positioning references for the vision recognition equipment and play a crucial role on the production line. The vision recognition system can accurately identify the position of the battery end plate 1, which helps improve production efficiency and assembly accuracy, ensuring the accurate positioning of the battery module. In a preset program, the reference mounting holes 401 also assist in the application of thermally conductive adhesive to the bottom of the battery module, enabling operators or automated equipment to apply the adhesive at the correct location on the bottom of the battery, ensuring good thermal conductivity.

[0035] In addition, the reference mounting hole 401 provides a fixing point for the installation of the liquid cooling plate, which is fixed by screws to ensure that the liquid cooling plate can be firmly connected to the battery module, optimize the cooling effect, and thus enhance the overall stability and reliability of the system.

[0036] In some optional embodiments of this utility model, such as Figure 6As shown, the reference mounting hole 401 is constructed as an oblong hole, with the long axis of the oblong hole extending along the length or width direction of the lower edge.

[0037] Since the length of the battery module may have certain tolerances, the use of an oblong hole structure can effectively compensate for this variation. This oblong hole's flexibility allows the battery module to move freely within a certain range without affecting its connection to the liquid cooling plate or other components.

[0038] Meanwhile, the long axis of the oblong hole extends along its lower length, providing more adjustment space during installation and ensuring precise alignment of components. This helps reduce assembly errors caused by tolerances, improving overall assembly quality and reliability.

[0039] In some optional embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the battery end plate 1 has frame ribs 500 on opposite sides along its length, and mesh-like reinforcing ribs 210 are formed between the frame ribs 500 on both sides. The frame ribs 210 are provided with limiting grooves 211 extending in a flat direction, which are adapted to accommodate steel strips 30 to bind the battery end plate 1 to the end of the battery module.

[0040] The limiting groove 211 allows the steel strip 30 to be safely embedded and secured, ensuring the stability of the battery end plate 1 during transportation and use, and preventing the battery module from loosening or shifting due to vibration or external force. The limiting groove 211 not only accommodates the steel strip but also provides an accurate positioning reference, making the bundling process between the battery end plate 1 and the battery module more convenient and efficient, ensuring the correct position of the battery module within the battery pack.

[0041] In some optional embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the battery end plate 1 has frame ribs 500 on opposite sides along its length, and a partition rib 600 is formed between the first battery region 10 and the second battery region 20. Both the frame ribs 500 and the partition ribs 600 have tooling alignment grooves 501 on their outer end faces 200 of the battery end plate 1. The tooling alignment grooves 501 are suitable for a robotic arm to extend into for stacking battery modules. The tooling alignment grooves 501 extend along the length of the frame ribs and the partition ribs 600.

[0042] The tooling alignment slot 501 provides a clear alignment reference for the robotic arm, ensuring accurate positioning when stacking battery modules, thereby guaranteeing the stability and alignment of the battery modules. By using the tooling alignment slot 501, the robotic arm can grasp and place battery modules more quickly, reducing manual alignment time, thus improving overall assembly efficiency and shortening the production cycle.

[0043] Meanwhile, the tooling alignment slot 501 can effectively reduce assembly errors caused by manual operation, ensuring that each battery module can be consistently and stably joined together when stacked, thus improving product quality.

[0044] In some optional embodiments of this utility model, such as Figure 4 As shown, a filling groove 101 corresponding to the position of the tooling alignment groove 501 is constructed on the inner end face 200 of the battery end plate 1. The filling groove 101 and the alignment groove 501 are interconnected. The filling groove 101 extends along the height direction of the battery end plate 1 and extends beyond both ends of the alignment groove 501. The filling groove 101 is suitable for installing insulating buffer material on the inner end face 200 of the battery end plate 1.

[0045] The filling groove 501 facilitates the installation of insulating buffer material on the inner side of the battery end plate 1. This insulating buffer material is located between the battery module and the battery end plate 1, effectively preventing electrical short circuits between battery modules and enhancing safety. Furthermore, by installing the buffer material, the filling groove 501 is filled with insulating buffer material, which effectively reduces vibration and external impacts to the battery module during use, thereby protecting internal components and extending the battery module's lifespan.

[0046] In some optional embodiments of this utility model, such as Figure 3 As shown, the battery end plate 1 has an identification mark 212 set in the grid formed by the reinforcing ribs 210.

[0047] The identification mark 212 provides a unique identifier for each battery module, facilitating easy traceability of the cell origin, production batch, and relevant parameters during later use, thus enhancing product traceability. The identification mark 212 also allows for recording the performance indicators and quality data of each battery module during production and inspection, facilitating quality tracking and troubleshooting, and improving overall quality management. Furthermore, the unique identification mark 211 effectively prevents counterfeiting and ensures that users receive genuine battery products that meet quality standards.

[0048] In some optional embodiments of this utility model, the battery module end plate 1 is an aluminum alloy casting, and the reinforcing rib 210 is flush with the outer end face of the battery end plate 1. Aluminum alloy has a good strength-to-weight ratio, and the battery end plate 1 manufactured through casting can effectively integrate complex shapes and reinforcing ribs, thereby improving the overall compressive and bending resistance of the fixture and enhancing the overall strength and durability of the battery module. The reinforcing rib 210 being flush with the outer end face of the battery end plate 1 can better distribute the load under stress, allowing the battery end plate 1 to remain flat when subjected to external impact or pressure, preventing deformation or structural failure.

[0049] The following describes the battery pack according to an embodiment of the present invention.

[0050] According to an embodiment of the present invention, the battery pack includes: a multi-row battery module, a steel strip 30, an insulating member 11, and a battery end plate 1 according to the above embodiment of the present invention. The battery end plate 1 is installed at the end of the multi-row battery module, and the battery end plate 1 located at one end of the battery module is adapted to span across the multi-row battery module. The steel strip 30 is tied to the outer periphery of the battery end plate 1 and the battery module. The insulating member 11 is installed on the battery end plate and is insulated from the battery cells of the battery module.

[0051] The battery end plate 1 provides a stable support structure, ensuring that all batteries in the battery module are reliably secured together, preventing loosening during vibration or use. The steel strip 30 tightly secures the battery end plate 1 to the battery module, increasing the overall strength and stability of the structure, enabling it to withstand external forces and pressures, and improving the battery pack's durability. The insertion of the insulator 11 effectively prevents the risk of short circuits between the battery end plate and the battery module, thereby improving the battery pack's safety. Furthermore, the insulator 11 reduces current leakage during battery operation, ensuring normal battery function.

[0052] The battery pack according to the present invention has advantages such as high structural strength and prevention of deformation by utilizing the battery end plate 1 of the above embodiment of the present invention.

[0053] Other components and operations, such as the battery end plate 1 and the battery pack, according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0055] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery end plate, characterized by, The battery end plate is integrally formed by die casting. The battery end plate is adapted to span the same end of multiple rows of battery modules. The battery end plate has at least a first battery region and a second battery region along its length. The battery end plate has an inner end face and an outer end face respectively on opposite sides along its thickness direction. The outer end face of the battery end plate is provided with reinforcing ribs arranged in a grid pattern along the transverse and longitudinal directions. The positions of the reinforcing ribs correspond to the positions of the first battery region and the second battery region.

2. The battery end plate of claim 1, wherein, The battery end plate has an upper edge and a lower edge on opposite sides along the height direction; The upper edge is provided with insulating mounting holes suitable for installing insulating components. The positions of the insulating mounting holes correspond to the first battery region and the second battery region. The insulating mounting holes in the first battery region are suitable for installing insulating components that are insulated from the battery module in the first battery region, and the insulating mounting holes in the second battery region are suitable for installing insulating components that are insulated from the battery module in the second battery region.

3. The battery end plate of claim 2, wherein, The insulating mounting holes in the first battery region are arranged in pairs and are respectively located on both sides of one of the longitudinal reinforcing ribs in the first battery region; The insulating mounting holes of the second battery region are arranged in pairs and are respectively located on both sides of one of the longitudinal reinforcing ribs of the second battery region.

4. The battery end plate of claim 1, wherein, The battery end plate has an upper edge and a lower edge on opposite sides along the height direction; The lower edge is provided with a reference mounting hole, which is adapted to insert a fastener to mount the battery end plate to the liquid cooling plate, and / or the reference mounting hole is adapted to be recognized by a visual recognition device.

5. The battery end plate of claim 1, wherein, The battery end plate has frame ribs on opposite sides along its length, and the mesh-like reinforcing ribs are formed between the frame ribs on both sides. The frame rib has a limiting groove extending along the flat side, which is adapted to accommodate a steel strip to bind the battery end plate to the end of the battery module.

6. The battery end plate of claim 5, wherein, The battery end plate has frame ribs on opposite sides along its length, and the battery end plate has partition ribs between the first battery area and the second battery area. The frame ribs and the partition ribs are each provided with a tooling alignment groove on the outer end face of the battery end plate. The tooling alignment groove is adapted for a robotic arm to extend into and stack the battery modules.

7. The battery end plate of claim 6, wherein, The inner end face of the battery end plate is provided with a filling groove corresponding to the position of the tooling alignment groove. The filling groove and the alignment groove are interconnected. The filling groove is suitable for installing insulating buffer material on the inner end face of the battery end plate.

8. The battery end plate of claim 1, wherein, The battery end plate has identification marks set in the grid formed by the reinforcing ribs.

9. The battery module end plate of claim 1, wherein, The battery end plate is an aluminum alloy casting, and the reinforcing rib is flush with the outer end face of the battery end plate.

10. A battery pack, characterized by, The battery pack includes: Multi-row battery modules; The battery end plate according to any one of claims 1-9, wherein the battery end plate is installed at the end of the multi-row battery module, and the battery end plate located at one end of the battery module is adapted to span across the multi-row battery module. A steel strip, which is bundled around the battery end plate and the outer periphery of the battery module; An insulating component is mounted on the battery end plate.

Images