Battery cover plate assembly

Abstract

The utility model relates to a battery cover plate assembly which comprises a top cover base body of a square plate-shaped structure; the pole columns comprise a positive pole column and a negative pole column, and the positive pole column and the negative pole column are oppositely arranged on the two sides of the end face of the top cover base body; the lower bracket is arranged at the lower end of the top cover base body and is connected with the top cover base body; the collector plates comprise a positive collector plate and a negative collector plate, and the positive collector plate and the negative collector plate are oppositely arranged on the two sides of the lower support. According to the battery cover plate assembly provided by the invention, the square battery cover plate is provided, and the corresponding collector plate is arranged, so that the outer package requirement of the square lithium battery is met.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cover assembly. Background Art

[0002] Lithium batteries are currently booming, with widespread applications in consumer batteries, power batteries, and energy storage batteries. Based on their shape, batteries can generally be categorized as cylindrical, prismatic, and soft-pack lithium batteries.

[0003] However, due to the diverse shapes of existing lithium batteries, existing lithium battery packaging cannot fully adapt to existing lithium battery shapes. If the battery packaging design does not meet the requirements, it may lead to poor battery current capacity and heat dissipation issues. To meet the needs of the diverse shapes of lithium batteries, a new technical solution is needed in this field to solve the technical problem of lithium battery packaging adaptation. Utility Model Content

[0004] The purpose of the present application is to provide a battery cover assembly, which meets the outer packaging requirements of square lithium batteries by providing a square battery cover and arranging a corresponding current collecting plate.

[0005] To this end, an embodiment of the present application provides a battery cover assembly, comprising: a top cover base, which is a square plate structure; poles, comprising a positive pole and a negative pole, the positive pole and the negative pole being arranged on both sides of the end face of the top cover base opposite to each other; a lower bracket, arranged at the lower end of the top cover base and connected to the top cover base; and a current collecting plate, comprising a positive current collecting plate and a negative current collecting plate, the positive current collecting plate and the negative current collecting plate being arranged on both sides of the lower bracket opposite to each other; wherein, the positive current collecting plate and the negative current collecting plate are L-shaped, the L-shaped short sides of the positive collecting plate and the negative collecting plate are pressed between the top cover base and the lower bracket, and the L-shaped short sides of the positive collecting plate and the negative collecting plate are both covered on the lower bracket and are arranged toward the center of the lower bracket.

[0006] In a possible implementation, a positive electrode slot and a negative electrode slot are provided at opposite ends of the top cover base, the positive electrode column is adapted to and buried in the positive electrode slot, and the negative electrode column is adapted to and buried in the negative electrode slot.

[0007] In a possible implementation, the space between the positive electrode column and the positive electrode tank is filled with a positive electrode wrapping injection molding glue, and the space between the negative electrode column and the negative electrode tank is filled with a negative electrode wrapping injection molding glue.

[0008] In a possible implementation, both the positive electrode post and the negative electrode post are provided with a pole center hole, and a sealing ring is provided in each of the pole center holes.

[0009] In a possible implementation, limiting holes are provided in both the positive electrode tank and the negative electrode tank, and limiting members are provided in the limiting holes to respectively confine the positive electrode column and the negative electrode column in the positive electrode tank and the negative electrode tank.

[0010] In a possible implementation, it further includes a positive electrode column rivet and a negative electrode column rivet, wherein the positive electrode column rivet is inserted into the positive electrode column to rivet the positive electrode column to the top cover base, and the negative electrode column rivet is inserted into the negative electrode column to rivet the negative electrode column to the top cover base.

[0011] In a possible implementation, the positive electrode column and the positive electrode column rivet are welded at the end surface connection, and the negative electrode column and the negative electrode column rivet are welded at the end surface connection.

[0012] In a possible implementation, insulating pads are provided at the compressed portions of the L-shaped short sides of the positive current collecting plate and the negative current collecting plate.

[0013] In a possible implementation, a liquid injection hole is provided on a side of the top cover substrate close to the positive electrode.

[0014] In a possible implementation, an explosion-proof valve hole is provided at the center of the top cover base, and an explosion-proof valve is provided in the explosion-proof valve hole.

[0015] According to the battery cover assembly provided in the embodiment of the present application, a square top cover base is provided, which is adapted to a square lithium battery. In addition, the embodiment of the present application provides an L-shaped current collecting plate to increase the contact area between the current collecting plate and the positive electrode column, thereby improving the heat dissipation capacity and current flow capacity of the battery and enhancing the overall performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In addition, in the drawings, the same reference numerals are used for the same components, and the drawings are not drawn according to the actual scale.

[0017] Figure 1 An exploded view of a battery cover assembly provided in an embodiment of the present application is shown;

[0018] Figure 2 A schematic structural diagram of a battery cover assembly provided in an embodiment of the present application is shown.

[0019] Description of reference numerals:

[0020] 1. Top cover base; 11. Positive electrode tank; 12. Liquid injection hole; 13. Explosion-proof valve hole; 14. Negative electrode tank; 15. Limit hole; 16. Electrode center hole;

[0021] 2. Insulation pad;

[0022] 3. Sealing ring;

[0023] 41. Plastic injection wrapping of positive electrode; 42. Plastic injection wrapping of negative electrode;

[0024] 51. Positive pole; 52. Negative pole;

[0025] 61. Positive pole rivet; 62. Negative pole rivet;

[0026] 71. Positive current collecting plate; 72. Negative current collecting plate;

[0027] 8. Lower bracket;

[0028] 9. Explosion-proof valve. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0030] Batteries are generally categorized by shape into cylindrical lithium batteries, prismatic lithium batteries, and soft-pack lithium batteries. However, due to the diverse shapes of existing lithium batteries, the outer packaging of existing lithium batteries cannot fully adapt to the shape of existing lithium batteries. If the battery outer packaging design does not meet the requirements, there may be problems with poor battery current capacity and heat dissipation. To address the above issues, the embodiments of the present application provide a battery cover assembly that is suitable for prismatic lithium batteries and improves the battery's heat dissipation and current capacity.

[0031] Specifically, such as Figures 1 to 2As shown, the embodiment of the present application provides a battery cover assembly, which includes a top cover base 1, a pole, a lower bracket 8 and a current collecting plate. Since the embodiment of the present application is faced with a lithium battery with a square structure, the top cover base 1 is a square plate structure, which is convenient for adapting to a square lithium battery; the pole includes a positive pole 51 and a negative pole 52, and the positive pole 51 and the negative pole 52 are arranged on both sides of the end face of the top cover base 1 opposite to each other, and the positive pole 51 and the negative pole 52 are riveted to the top cover base 1; the lower bracket 8 is arranged on the top The lower end of the cover base 1 is connected to the lower end surface of the top cover base 1; the current collecting plate includes a positive current collecting plate 71 and a negative current collecting plate 72, and the positive current collecting plate 71 and the negative current collecting plate 72 are arranged on both sides of the lower bracket 8 opposite to each other; wherein, the positive current collecting plate 71 and the negative current collecting plate 72 are L-shaped, and the short sides of the L-shaped positive current collecting plate 71 and the negative current collecting plate 72 are pressed tightly between the top cover base 1 and the lower bracket 8, and the short sides of the L-shaped positive current collecting plate 71 and the negative current collecting plate 72 are both covered on the lower bracket 8 and arranged toward the center of the lower bracket 8. Through such a setting, the contact area between the current collecting plate and the pole can be increased, effectively increasing the transmission and distribution of current, improving the heat dissipation and overcurrent capacity of the battery, and thus improving the overall performance of the battery.

[0032] In an alternative example, Figure 1 As shown, a positive electrode slot 11 and a negative electrode slot 14 are provided at opposite ends of the top cover base 1 provided in the embodiment of the present application, the positive electrode column 51 is adapted to the positive electrode slot 11 and buried in the positive electrode slot 11, and the negative electrode column 52 is adapted to the negative electrode slot 14 and buried in the negative electrode slot 14.

[0033] For example, Figure 1 As shown, the positive electrode column 51 and the positive electrode tank 11 are both square structures with rounded corners, and the negative electrode column 52 and the negative electrode tank 14 are both square structures with rounded corners. The positive electrode column 51 is buried in the positive electrode tank 11, with a portion protruding from the positive electrode tank 11. Similarly, the negative electrode column 52 is buried in the negative electrode tank 14, with a portion protruding from the negative electrode tank 14. It should be noted that those skilled in the art can adjust the shapes of the positive electrode column 51, the positive electrode tank 11, the negative electrode column 52, and the negative electrode tank 14 according to actual conditions to better adapt to actual production needs. Such adjustments and changes to the shapes of the positive electrode column 51, the positive electrode tank 11, the negative electrode column 52, and the negative electrode tank 14 do not deviate from the principles and scope of the present application and should be limited to the scope of protection of the present application.

[0034] In an optional example, the space between the positive electrode column 51 and the positive electrode tank 11 is filled with a positive electrode wrapping injection molding glue 41, and the space between the negative electrode column 52 and the negative electrode tank 14 is filled with a negative electrode wrapping injection molding glue 42. In an additional example, the shape and size of the positive electrode tank 11 and the negative electrode tank 14 described in the above example can be determined by the positive electrode wrapping injection molding glue 41 and the negative electrode wrapping injection molding glue 42 in this example, that is, the positive electrode tank 11 and the negative electrode tank 14 are injection molding grooves, which are constructed into the same shape as the above-mentioned poles by injection molding glue, so as to facilitate adaptation to poles with different cross-sectional shapes.

[0035] In an alternative example, Figure 1 As shown, both the positive pole 51 and the negative pole 52 are provided with a pole center hole 16, and a sealing ring 3 is provided in each pole center hole 16. The sealing ring 3 can seal the connection between the pole and the pole slot to play an insulating role.

[0036] In an alternative example, Figure 1 As shown, the positive electrode tank 11 and the negative electrode tank 14 are both provided with a limiting hole 15, and a limiting member is provided in the limiting hole 15 to respectively limit the positive electrode column 51 and the negative electrode column 52 within the positive electrode tank 11 and the negative electrode tank 14. The limiting member can be a pin, which locks the electrode column to prevent it from rotating loose.

[0037] In an optional example, the embodiment of the present application further includes a positive electrode post rivet 61 and a negative electrode post rivet 62, wherein the positive electrode post rivet 61 is provided in the positive electrode post 51 to rivet the positive electrode post 51 to the top cover base 1, and the negative electrode post rivet 62 is provided in the negative electrode post 52 to rivet the negative electrode post 52 to the top cover base 1. The positive electrode post rivet 61 and the negative electrode post rivet 62 pass through the top cover base 1, the electrode post plastic wrap, and the positive and negative electrode posts from bottom to top, riveting and tightening the positive and negative electrode posts so that the electrode posts and the electrode post plastic wrap are tightly pressed into the electrode post plastic wrap groove, thereby playing a role of connection and fastening.

[0038] In an optional example, the positive electrode column 51 is welded to the positive electrode column rivet 61 at the end face connection, and the negative electrode column 52 is welded to the negative electrode column rivet 62 at the end face connection. Welding is performed on the upper end faces of the positive and negative electrode column rivets and the positive and negative electrode columns. The poles are assembled by riveting first and then welding. At the lower end faces of the positive and negative electrode column rivets, the positive and negative current collecting plates are welded to the pole column rivets by welding, further strengthening the stability of the rivet connection.

[0039] In an optional example, the compressed portions of the L-shaped short sides of the positive current collecting plate 71 and the negative current collecting plate 72 are both provided with insulating pads 2. The insulating pads 2 are made of insulating plastic, which provides good insulation, thereby insulating the top cover base 1 and the lower bracket 8, making the battery cover safer and preventing leakage.

[0040] In an optional example, a liquid injection hole 12 is provided on one side of the top cover substrate 1 close to the positive electrode. Electrolyte can be injected into the battery through the liquid injection hole 12 to ensure the activity of the battery chemical materials.

[0041] In an optional example, an explosion-proof valve hole 13 is provided at the center of the top cover base 1, and an explosion-proof valve 9 is provided in the explosion-proof valve hole 13. The provision of the explosion-proof valve 9 further enhances the protective effect of the battery cover on the battery.

[0042] According to the battery cover assembly provided in the embodiment of the present application, a square top cover base is provided, which is adapted to a square lithium battery. In addition, the embodiment of the present application provides an L-shaped current collecting plate to increase the contact area between the current collecting plate and the positive electrode column, thereby improving the heat dissipation capacity and current flow capacity of the battery and enhancing the overall performance of the battery.

[0043] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0044] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0045] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cover assembly, characterized in that: include: A top cover base, wherein the top cover base is a square plate structure; The poles include a positive pole and a negative pole, wherein the positive pole and the negative pole are arranged on opposite sides of the end surface of the top cover base; a lower bracket, disposed at the lower end of the top cover base and connected to the top cover base; and The current collecting plate includes a positive current collecting plate and a negative current collecting plate, wherein the positive current collecting plate and the negative current collecting plate are arranged on both sides of the lower bracket opposite to each other; Among them, the positive current collecting plate and the negative current collecting plate are L-shaped, and the L-shaped short sides of the positive current collecting plate and the negative current collecting plate are pressed between the top cover base and the lower bracket. The L-shaped short sides of the positive current collecting plate and the negative current collecting plate are both covered on the lower bracket and are arranged towards the center of the lower bracket.

2. The battery cover assembly according to claim 1, characterized in that: A positive electrode slot and a negative electrode slot are oppositely arranged at two ends of the top cover base. The positive electrode column is adapted to and buried in the positive electrode slot, and the negative electrode column is adapted to and buried in the negative electrode slot.

3. The battery cover assembly according to claim 2, characterized in that: The space between the positive electrode column and the positive electrode tank is filled with positive electrode wrapping injection glue, and the space between the negative electrode column and the negative electrode tank is filled with negative electrode wrapping injection glue.

4. The battery cover assembly according to claim 2, characterized in that: The positive pole and the negative pole are both provided with pole center holes, and sealing rings are both provided in the pole center holes.

5. The battery cover assembly according to claim 2, characterized in that: Limiting holes are provided in both the positive electrode tank and the negative electrode tank, and limiting members are provided in the limiting holes to respectively limit the positive electrode column and the negative electrode column in the positive electrode tank and the negative electrode tank.

6. The battery cover assembly according to claim 2, characterized in that: It also includes a positive electrode column rivet and a negative electrode column rivet. The positive electrode column rivet is inserted into the positive electrode column to rivet the positive electrode column to the top cover base, and the negative electrode column rivet is inserted into the negative electrode column to rivet the negative electrode column to the top cover base.

7. The battery cover assembly according to claim 6, characterized in that: The positive electrode column and the positive electrode column rivet are welded at the end surface connection, and the negative electrode column and the negative electrode column rivet are welded at the end surface connection.

8. The battery cover assembly according to claim 1, characterized in that: Insulation pads are provided on the compressed portions of the L-shaped short sides of the positive current collecting plate and the negative current collecting plate.

9. The battery cover assembly according to claim 1, characterized in that: A liquid injection hole is provided on one side of the top cover base body close to the positive electrode.

10. The battery cover assembly according to claim 1, characterized in that: An explosion-proof valve hole is provided at the center of the top cover base, and an explosion-proof valve is provided in the explosion-proof valve hole.

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