Battery end plate and blade battery

Abstract

This utility model relates to the field of battery technology, specifically to a battery end plate and a blade battery. The battery end plate includes: an end plate body and a guide support structure; the end plate body has a receiving groove formed along the length of the tab for accommodating the tab; the guide support structure is located on one side of the end plate body corresponding to the folded portion of the tab; the thickness of the guide support structure gradually increases from the bottom to the top of the receiving groove to form a guide support slope for guiding and supporting the folded portion of the tab. The battery end plate and blade battery provided by this utility model, after battery assembly, utilize the guide support structure with gradually increasing thickness from the bottom to the top of the receiving groove to guide and support the folded portion of the tab, preventing the sidewall of the end plate from bulging outward due to pressure from the folded portion of the tab. Furthermore, the guide support slope can gather the folded portion of the tab, further preventing excessive pressure on the sidewall of the end plate from the folded portion of the tab, significantly improving the stability and safety factor of the battery end plate during use.

Description

Technical Field

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

[0002] With the continuous development of lithium-ion battery technology, lithium-ion batteries have been widely used in electric vehicles and energy storage, thus placing increasingly higher demands on their performance and safety. In existing blade cell designs, the positive terminal plate is located between the positive electrode cover and the electrode assembly. After the tabs are inserted into the end plate, the cover plate and the end plate are joined and pressed together, thereby fixing the position of the electrode assembly. In addition, the positive terminal plate also serves to accommodate the tabs, ensuring internal insulation. The insulating sheet of the bare cell is fixed around the end plate by heat fusion, further protecting the electrode assembly and preventing contact with the casing.

[0003] However, see Figure 6 As shown, because the tabs of the battery cell are relatively wide, the positive terminal plate needs to pass through a large tab size. However, the terminal plate is usually made using injection molding, and the material is often a material that is easily deformed (such as PP). In this case, the baffle on one side of the terminal plate may be squeezed by the tabs and bulge outward, which may cause the battery cell tabs to be exposed and lead to a short circuit. Utility Model Content

[0004] This utility model provides a battery end plate and a blade battery to solve the defect in existing blade batteries where the tabs easily squeeze the side wall of the end plate, causing it to bulge outward and deform, resulting in exposed battery tabs and short circuits.

[0005] This utility model provides a battery end plate, including: an end plate body and a guide support structure.

[0006] The end plate body has a receiving groove for accommodating the electrode along the length direction of the electrode tab. The guide support structure is provided on one side of the end plate body corresponding to the closing part of the electrode tab. The thickness of the guide support structure gradually increases from the bottom to the top of the receiving groove to form a guide support slope for guiding and supporting the closing part of the electrode tab.

[0007] According to the battery end plate provided by this utility model, the guide support structure includes a plurality of guide support member groups spaced apart along the length direction of the electrode tab, the guide support member group includes at least one guide support member, and the thickness of the guide support member gradually increases from the bottom to the top of the receiving groove to form the guide support slope.

[0008] According to the battery end plate provided by this utility model, the number of guide supports is the same in each of the guide support groups.

[0009] According to the battery end plate provided by this utility model, the spacing between adjacent guide support groups is the same.

[0010] According to the battery end plate provided by this utility model, the end plate body is provided with a limiting snap-fit ​​structure on one side corresponding to the folding part of the electrode tab, and the limiting snap-fit ​​structure is used to snap-fit ​​with the plastic part under the cover plate.

[0011] According to the battery end plate provided by this utility model, the limiting snap-fit ​​structure includes a plurality of limiting snap-fit ​​component groups spaced apart along the length direction of the electrode tab, and the limiting snap-fit ​​component group includes at least one limiting snap-fit ​​component, which is used to snap-fit ​​with the plastic part under the cover plate.

[0012] According to the battery end plate provided by this utility model, the number of limiting clips is the same in each of the limiting clip groups.

[0013] According to the battery end plate provided by this utility model, the spacing between adjacent limiting clip groups is the same.

[0014] According to the battery end plate provided by this utility model, the limiting snap-fit ​​structure and the guide support structure are integrally arranged, and the guide support structure and the end plate body are integrally arranged.

[0015] Another aspect of this utility model provides a blade battery, comprising: an electrode assembly, a battery end plate as described in any of the preceding claims, and a cover plate.

[0016] The electrode assembly is provided with electrode tabs, which are located in the receiving groove. The folding part of the electrode tabs is located on the same side as the guide support structure. The bottom of the cover plate is provided with a cover plate lower plastic part, which is engaged with the limiting snap-fit ​​structure.

[0017] The battery end plate and blade battery provided by this utility model have a receiving groove on the end plate body for accommodating the tabs, and a guide support structure on one side of the end plate body corresponding to the folded part of the tabs. After the battery is assembled, the guide support structure with gradually increasing thickness along the bottom to the top of the receiving groove can guide and support the folded part of the tabs, preventing the side wall of the end plate from being squeezed by the folded part of the tabs and deforming outward. In addition, the guide support slope can gather the folded part of the tabs, further preventing the folded part of the tabs from excessively squeezing the side wall of the end plate, which can significantly improve the stability and safety factor of the battery end plate during use.

[0018] 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

[0019] To more clearly illustrate the technical solutions in 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is one of the schematic diagrams of the battery end plate provided in this embodiment of the utility model.

[0021] Figure 2 This is the second schematic diagram of the battery end plate provided in this embodiment of the utility model.

[0022] Figure 3 This is the third schematic diagram of the battery end plate provided in this embodiment of the utility model.

[0023] Figure 4 This is a schematic diagram of the blade battery provided in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the guide support of the tabs on the middle plate of the blade battery provided in this embodiment of the utility model.

[0025] Figure 6 This is a schematic diagram showing how the folded-back portion of the tabs in an existing blade battery compresses the sidewall of the end plate.

[0026] Figure label:

[0027] 100. Battery end plate; 110. End plate body; 111. Receiving groove; 120. Guide support structure; 121. Guide support inclined surface; 122. Guide support component assembly; 1221. Guide support component; 130. Limiting snap-fit ​​structure; 131. Limiting snap-fit ​​component assembly; 1311. Limiting snap-fit ​​component; 200. Terminal assembly; 210. Terminal tab; 211. Gathering part; 300. Cover plate; 310. Plastic part under cover plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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 the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0031] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] The following is combined with Figures 1 to 5 This invention describes the battery end plate and blade battery provided by this utility model.

[0034] See Figures 1 to 3 As shown, the battery end plate 100 provided in this embodiment of the present invention includes: an end plate body 110 and a guide support structure 120.

[0035] The end plate body 110 has a receiving groove 111 for accommodating the electrode 210 along the length direction of the electrode 210. The guide support structure 120 is provided on one side of the end plate body 110 corresponding to the closing portion 211 of the electrode 210. The thickness of the guide support structure 120 gradually increases from the bottom to the top of the receiving groove 111 to form a guide support slope 121 for guiding and supporting the closing portion 211 of the electrode 210.

[0036] The battery end plate 100 and blade battery provided by this utility model are achieved by providing a receiving groove 111 on the end plate body 110 for accommodating the tab 210, and providing a guide support structure 120 on one side of the end plate body 110 corresponding to the folding portion 211 of the tab 210. See [reference needed] Figure 4 As shown, after the battery is assembled, the guide support structure 120, whose thickness gradually increases from the bottom to the top of the receiving groove 111, can guide and support the folded portion 211 of the tab 210, preventing the side wall of the end plate from being squeezed by the folded portion 211 of the tab 210 and deforming outward. In addition, the guide support slope 121 can gather the folded portion 211 of the tab 210, further preventing the folded portion 211 of the tab 210 from excessively squeezing the side wall of the end plate, which can significantly improve the stability and safety factor of the battery end plate 100 during use.

[0037] Specifically, the battery end plate 100 includes an end plate body 110 and a guide support structure 120. The end plate body 110 accommodates the battery tabs 210 and provides fixation and support. The end plate body 110 has a receiving groove 111 along the length of the tabs 210 to accommodate and fix the position of the tabs 210, ensuring correct connection and stable operation of the battery tabs 210. The guide support structure 120 gradually increases in thickness from the bottom to the top of the receiving groove 111, forming a guide support slope 121 for guiding and supporting the gathered portion 211 of the tabs 210. The guide support structure 120 provides structural reinforcement to the side of the receiving groove 111 located at the gathered portion 211 of the tabs 210, and the guide support slope 121 guides and gathers the gathered portion 211 of the tabs 210.

[0038] Since the thickness of the guide support structure 120 gradually increases from the bottom to the top of the receiving groove 111, it can be implemented in various ways according to the prior art. For example, a gradually thickened portion is provided on the side wall of the receiving groove 111 corresponding to the closing portion 211 of the tab 210, so that the side wall forms a continuously thickened inclined structure from the bottom to the top. Through the linear change in the thickness of the side wall, a guide support inclined surface 121 with a guiding function is formed. Alternatively, multiple guide support members 1221 are provided at intervals along the length direction of the tab 210 on one side of the receiving groove 111 located at the closing portion 211 of the tab 210, and the thickness of the guide support members 1221 gradually increases from the bottom to the top of the receiving groove 111.

[0039] In practical implementation, the guide support structure 120 can be directly formed during the manufacturing process of the end plate body 110 using injection molding, making it integrally formed with the end plate body 110; or it can be connected to the corresponding side of the receiving groove 111 through an independent component, thereby enhancing the stability of the end plate structure. Furthermore, the guide support structure 120 gradually increases in thickness from the bottom to the top of the receiving groove 111, providing stable support and preventing the end plate from deforming due to the converging portion 211 of the tab 210 pressing against the end plate body 110. Moreover, by precisely designing the guide support slope 121, it can be ensured that the converging portion 211 of the tab 210 is properly guided and gathered, further improving the overall strength and service life of the battery end plate 100 and reducing potential safety hazards caused by the tab 210 being squeezed.

[0040] See Figures 1 to 3 As shown, according to some embodiments of the present invention, the guide support structure 120 includes a plurality of guide support member groups 122 spaced apart along the length direction of the tab 210. Each guide support member group 122 includes at least one guide support member 1221. The thickness of the guide support member 1221 gradually increases from the bottom to the top of the receiving groove 111 to form a guide support inclined surface 121.

[0041] By configuring the guide support structure 120 to include multiple guide support groups 122 spaced apart along the length of the tab 210, the guide support 1221 in the multiple guide support groups 122 can strengthen the structure at different positions of the end plate body 110, and the guide support slope 121 formed by each guide support 1221 can guide and gather the closing portion 211 of the tab 210, preventing the closing portion 211 of the tab 210 from excessively squeezing the side wall of the end plate.

[0042] It should be noted that in each guide support group 122, the number of guide support members 1221 can be one or more. The number of guide support members 1221 in each guide support group 122 can be the same or different. The spacing between adjacent guide support groups 122 can be the same or different, and no special restrictions are placed on this.

[0043] See Figures 1 to 3 As shown, according to some embodiments of the present invention, the number of guide supports 1221 is the same in each guide support group 122.

[0044] By setting the number of guide support members 1221 in each guide support member group 122 to be the same, the uniformity and stability of the force on the guide support structure 120 can be improved, ensuring that the force on the whole is more uniform when each guide support member 1221 provides guide support, avoiding excessive deformation or stress concentration in local areas due to uneven support, thereby improving the durability and reliability of the battery end plate 100.

[0045] See Figures 1 to 3 As shown, according to some embodiments of the present invention, the spacing between adjacent guide support groups 122 is the same.

[0046] By setting the spacing of adjacent guide support groups 122 to be the same, the uniformity and stability of the force on the guide support structure 120 can be further optimized, ensuring that the force on each guide support 1221 is more uniform when providing guide support, avoiding excessive deformation or stress concentration in local areas due to uneven support, thereby improving the durability and reliability of the battery end plate 100.

[0047] See Figure 1 and Figure 2 As shown in the figure, as an example, in this embodiment, the end plate body 110 is provided with three guide support groups 122 on one side of the retracted portion 211 of the tab 210, and each guide support group 122 includes a guide support 1221.

[0048] See Figures 1 to 3 As shown, according to some embodiments of the present invention, the end plate body 110 is provided with a limiting snap-fit ​​structure 130 on one side of the retracting portion 211 of the tab 210, and the limiting snap-fit ​​structure 130 is used to snap-fit ​​with the plastic part 310 under the cover plate.

[0049] By providing a limiting snap-fit ​​structure 130 on one side of the closing portion 211 of the tab 210 corresponding to the end plate body 110, the limiting snap-fit ​​structure 130 can be snapped into the plastic part 310 under the cover plate, thereby further improving the end plate body 110's resistance to deformation under the squeezing action of the closing portion 211 of the tab 210, and further improving the stability and safety of the battery end plate 100 during use.

[0050] The limiting snap-fit ​​structure 130 can also be implemented in various ways in the prior art. For example, a limiting block, limiting protrusion, or other structure can be provided on one side of the end plate body 110 corresponding to the closing part 211 of the tab 210 for snap-fit ​​engagement with the plastic part 310 under the cover plate.

[0051] Similarly, the limiting snap-fit ​​structure 130 and the end plate body 110 can also be formed by injection molding process, directly forming the guide support structure 120 during the manufacturing process of the end plate body 110, so that it is integrally formed with the end plate body 110; or it can be connected to the corresponding side of the receiving groove 111 through independent components, so as to achieve the effect of snap-fit ​​with the plastic part 310 under the cover plate and enhance the stability of the end plate structure.

[0052] See Figures 1 to 3 As shown, according to some embodiments of the present invention, the limiting snap-fit ​​structure 130 includes a plurality of limiting snap-fit ​​component groups 131 spaced apart along the length direction of the tab 210. Each limiting snap-fit ​​component group 131 includes at least one limiting snap-fit ​​component 1311, which is used to snap-fit ​​with the plastic part 310 under the cover plate.

[0053] By setting the limiting snap-fit ​​structure 130 to include multiple limiting snap-fit ​​groups 131 spaced apart along the length direction of the tab 210, the various limiting snap-fit ​​groups 1311 in the multiple limiting snap-fit ​​groups 131 can strengthen the connection between different positions of the end plate body 110 and the plastic part 310 under the cover plate, thereby improving the end plate body 110's resistance to deformation under the squeezing action of the tab 210's closing part 211.

[0054] It should be noted that in each limit card connector group 131, the number of limit card connectors 1311 can be one or more. The number of limit card connectors 1311 in each limit card connector group 131 can be the same or different. The spacing between adjacent limit card connector groups 131 can be the same or different, and there are no special restrictions on this.

[0055] See Figures 1 to 3 As shown, according to some embodiments of the present invention, the number of limit card connectors 1311 is the same in each limit card connector group 131.

[0056] By setting the number of limiting snap-fit ​​pieces 1311 in each limiting snap-fit ​​piece group 131 to be the same, the snap-fit ​​effect of the limiting snap-fit ​​structure 130 on the entire end plate body 110 can be further ensured to be uniform and consistent. This improves the connection stability between the end plate body 110 and the plastic part 310 under the cover plate, allowing each snap-fit ​​point to be evenly distributed under force, avoiding excessive local stress concentration, thereby reducing the risk of deformation and improving the durability and reliability of the battery end plate 100.

[0057] See Figures 1 to 3 As shown, according to some embodiments of the present invention, the spacing between adjacent limiting card connector groups 131 is the same.

[0058] By setting the spacing between adjacent limit latching components 131 to be the same, the uniformity and stability of the force on the limit latching structure 130 can be further optimized, ensuring that the force on each limit latching component 1311 is more uniform when providing connection support, avoiding excessive deformation or stress concentration in local areas due to uneven support, thereby improving the durability and reliability of the battery end plate 100.

[0059] See Figure 1 and Figure 2 As shown, as an example, in this embodiment, the end plate body 110 is provided with three limiting fastener groups 131 on one side of the retracting portion 211 of the tab 210, and each limiting fastener group 131 includes a limiting fastener 1311.

[0060] See Figure 1 As shown, according to some embodiments of the present invention, the limiting snap-fit ​​structure 130 and the guide support structure 120 are integrally configured, and the guide support structure 120 and the end plate body 110 are integrally configured.

[0061] By integrating the limiting snap-fit ​​structure 130 with the guide support structure 120, and integrating the guide support structure 120 with the end plate body 110, the compactness and structural stability of the battery end plate 100 can be improved, and the processing technology of the battery end plate 100 can be simplified, enabling it to be integrally molded by injection molding.

[0062] The blade battery provided by this utility model is described below. The blade battery described below can be referred to in correspondence with the battery end plate 100 described above.

[0063] See Figure 4 and Figure 5 As shown, the blade battery provided in this embodiment of the present invention includes: an electrode assembly 200, a battery end plate 100 as described above, and a cover plate 300.

[0064] The electrode assembly 200 is provided with electrode tabs 210, which are located in the receiving groove 111. The folding part 211 of the electrode tabs 210 and the guide support structure 120 are located on the same side. The bottom of the cover plate 300 is provided with a cover plate lower plastic part 310, which is engaged with the limiting snap-fit ​​structure 130.

[0065] The blade battery provided by this utility model, by adopting the battery end plate 100 described in any of the above embodiments, can use the guide support structure 120 to guide and support the folded portion 211 of the tab 210, preventing the side wall of the end plate from being squeezed by the folded portion 211 of the tab 210 and deforming outward. In addition, the guide support inclined surface 121 can gather the folded portion 211 of the tab 210, further preventing the folded portion 211 of the tab 210 from excessively squeezing the side wall of the end plate, which can significantly improve the stability and safety factor of the blade battery during use.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery end plate, characterized in that, include: The end plate body has a receiving groove formed along the length direction of the electrode tab for accommodating the electrode tab. A guide support structure is provided on one side of the end plate body corresponding to the closing portion of the electrode tab. The thickness of the guide support structure gradually increases from the bottom to the top of the receiving groove to form a guide support slope for guiding and supporting the closing portion of the electrode tab.

2. The battery end plate according to claim 1, characterized in that, The guide support structure includes a plurality of guide support groups spaced apart along the length of the tab, each guide support group including at least one guide support member, the thickness of which gradually increases from the bottom to the top of the receiving groove to form the guide support slope.

3. The battery end plate according to claim 2, characterized in that, In each of the guide support groups, the number of guide supports is the same.

4. The battery end plate according to claim 3, characterized in that, The spacing between adjacent guide support groups is the same.

5. The battery end plate according to claim 1, characterized in that, The end plate body is provided with a limiting snap-fit ​​structure on one side corresponding to the folding part of the electrode ear. The limiting snap-fit ​​structure is used to snap-fit ​​with the plastic part under the cover plate.

6. The battery end plate according to claim 5, characterized in that, The limiting snap-fit ​​structure includes a plurality of limiting snap-fit ​​component groups spaced apart along the length direction of the electrode lug. Each limiting snap-fit ​​component group includes at least one limiting snap-fit ​​component, which is used to snap-fit ​​with the plastic part under the cover plate.

7. The battery end plate according to claim 6, characterized in that, In each of the aforementioned limit card connector groups, the number of limit card connectors is the same.

8. The battery end plate according to claim 7, characterized in that, The spacing between adjacent limit clip groups is the same.

9. The battery end plate according to claim 5, characterized in that, The limiting snap-fit ​​structure is integrally formed with the guide support structure, and the guide support structure is integrally formed with the end plate body.

10. A blade battery, characterized in that, include: The electrode assembly is provided with electrode tabs; The battery end plate as described in any one of claims 1 to 9, wherein the tab is located within the receiving groove, and the folded portion of the tab is located on the same side as the guide support structure; A cover plate, the bottom of which is provided with a lower plastic part, which engages with a limiting snap-fit ​​structure.

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