CN219658832U

CN219658832U - Top cover of power battery

Info

Publication number: CN219658832U
Application number: CN202320942950.0U
Authority: CN
Inventors: 汤鹏; 马永岗
Original assignee: Jiangsu Yaoning New Energy Innovation Technology Co ltd
Current assignee: Jiangsu Yaoning New Energy Innovation Technology Co ltd
Priority date: 2023-04-24
Filing date: 2023-04-24
Publication date: 2023-09-08
Anticipated expiration: 2033-04-24

Abstract

The utility model provides a power battery top cover, comprising: and (3) a lower plastic, a polished aluminum sheet and a punching support. At least two bosses are arranged on the lower plastic; a groove matched with the boss is formed in the aluminum sheet; the punching support is fixedly arranged at two ends of the lower plastic and perpendicular to the bottom surface of the lower plastic; wherein the aluminum sheet is arranged on the upper side of the lower plastic and connected with the lower plastic, and the punching support is arranged on the left side and the right side of the lower plastic. According to the power battery top cover, the boss and the groove are used for fixing the lower plastic and the aluminum sheet, so that the lower plastic and the aluminum sheet are prevented from sliding relatively. The aluminum sheet and the lower plastic are tightly connected, so that the structure is more stable. The punching support can support the battery cell, reduce short circuit risk and improve electrolyte wettability. The reliability of the power battery is improved. The safety of the battery is improved. And the top cover welding rate is improved.

Description

Top cover of power battery

Technical Field

The utility model relates to the field of new energy lithium batteries, in particular to a top cover of a power battery.

Background

A battery refers to a device that converts chemical energy into electrical energy in a cup, tank, or other container or portion of a composite container that contains an electrolyte solution and metal electrodes to generate an electrical current. Has a positive electrode and a negative electrode. With the advancement of technology, batteries are widely referred to as small devices capable of generating electrical energy. Such as a solar cell. The performance parameters of the battery are mainly electromotive force, capacity, specific energy and resistance. The battery is used as an energy source, the current which has stable voltage, stable current, long-time stable power supply and little influence from the outside can be obtained, the battery has simple structure, convenient carrying, simple and easy charging and discharging operation, is not influenced by the outside climate and temperature, has stable and reliable performance, and plays a great role in various aspects in the life of the modern society.

The battery may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like. The battery may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc. Batteries are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like. The battery may include a cadmium nickel battery, a hydrogen nickel battery, a lithium ion battery, a secondary alkaline zinc manganese battery, and the like. In addition to improving the performance of batteries, safety issues are also a non-negligible issue in the development of battery technology. If the safety problem of the battery is not guaranteed, the battery cannot be used. Therefore, how to enhance the safety of the battery is a technical problem to be solved in the battery technology. The plastic shifts when the battery cell tab and the electrode post are welded, and the lower plastic and the aluminum sheet slide relatively.

Disclosure of Invention

In view of the above drawbacks of the prior art, the present utility model provides a top cover of a power battery to improve the relative sliding between the top cover members.

To achieve the above and other related objects, the present utility model provides a power battery top cover comprising: and (3) a lower plastic, a polished aluminum sheet and a punching support.

At least two bosses are arranged on the lower plastic; a groove matched with the boss is formed in the aluminum sheet; the punching support is fixedly arranged at two ends of the lower plastic and perpendicular to the bottom surface of the lower plastic; wherein the aluminum sheet is arranged on the upper side of the lower plastic and connected with the lower plastic, and the punching support is arranged on the left side and the right side of the lower plastic.

In an example of the present utility model, the perforated support is provided with through holes, and the through holes are linearly arranged on the perforated support.

In an example of the utility model, the lower plastic and the aluminum sheet are relatively fixed by the clamping of the boss and the groove.

In an example of the present utility model, one end of the photo-aluminum sheet is provided with a liquid injection hole, and the other end of the photo-aluminum sheet is provided with a first pole hole.

In an example of the present utility model, the lower plastic is provided with mesh openings at the positions corresponding to the liquid injection holes of the aluminum sheet, and the lower plastic is provided with second pole holes at the positions corresponding to the first pole holes of the aluminum sheet.

In an example of the present utility model, a post is disposed between the aluminum sheet and the lower plastic, the post penetrating through the first post hole and the second post hole.

In an example of the present utility model, a tab is disposed at an end of the pole near the lower plastic, and a sealing ring is disposed between the pole and the second pole hole.

In one example of the utility model, the side of the aluminum sheet away from the lower plastic is provided with a square concave surface outside the first pole hole.

In one example of the utility model, the concave surface is provided with an upper plastic, the upper plastic is matched with the concave surface, the upper plastic and the concave surface are fixed through at least two ceramic posts, and one surface of the upper plastic, which is far away from the concave surface, is provided with a riveting block.

In one example of the utility model, the middle of the upper plastic and the riveting block is provided with a through hole matched with the pole.

According to the power battery top cover, the boss and the groove are used for fixing the lower plastic and the aluminum sheet, so that the lower plastic and the aluminum sheet are prevented from sliding relatively. The aluminum sheet and the lower plastic are tightly connected, so that the structure is more stable. The punching support can support the battery cell, reduce short circuit risk and improve electrolyte wettability. The reliability of the power battery is improved. The safety of the battery is improved. And the top cover welding rate is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a battery top cover according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a perforated bracket according to an embodiment of the utility model;

fig. 3 is a schematic view of an aluminum sheet according to an embodiment of the present utility model.

Description of element reference numerals

100. Lower plastic; 110. a boss; 120. a mesh; 130. a second post hole; 200. a polished aluminum sheet; 210. a liquid injection hole; 220. a first post hole; 230. a concave surface; 240. a groove; 300. a punching support; 400. a pole; 500. a tab; 600. a ceramic column; 700. applying plastic; 800. and riveting the blocks.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the utility model is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the utility model. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.

Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs and to which this utility model belongs, and any method, apparatus, or material of the prior art similar or equivalent to the methods, apparatus, or materials described in the examples of this utility model may be used to practice the utility model.

It should be understood that the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like are used in this specification for descriptive purposes only and not for purposes of limitation, and that the utility model may be practiced without materially departing from the novel teachings and without departing from the scope of the utility model.

Referring to fig. 1 to 3, a power battery top cover includes: lower plastic 100, aluminum sheet 200, and punching support 300.

The battery includes a case having an opening for accommodating an electrode assembly, and a top cap, the electrode assembly being fittable into the case through the opening of the case. The top cover is used for covering the opening of the shell so as to realize sealing. The battery case comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separator. The battery mainly relies on metal ions to move between the positive and negative electrode sheets. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive current collector includes a positive current collecting portion coated with a positive active material layer and a positive tab 500 connected to the positive current collecting portion, the positive tab 500 not being coated with the positive active material layer. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative current collector includes a negative current collecting portion coated with a negative active material layer and a negative tab 500 connected to the negative current collecting portion, the negative tab 500 not being coated with the negative active material layer.

In an embodiment of the present utility model, at least two bosses 110 are disposed on the lower plastic 100 of the top cover; the aluminum flake 200 is provided with a groove 240 matched with the boss 110. The aluminum sheet 200 and the lower plastic 100 are disposed opposite to each other, and the boss 110 and the groove 240 are engaged with each other so that the relative sliding between the aluminum sheet 200 and the lower plastic 100 can be achieved. The punching support 300 is fixedly arranged at two ends of the lower plastic 100 perpendicular to the bottom surface of the lower plastic 100; wherein the aluminum sheet 200 is disposed at one side of the lower plastic 100, and the perforated bracket 300 is disposed at the other side of the lower plastic 100. After the top cover is sealed with the battery case, the perforated support 300 is positioned inside the case to provide a supporting force.

In an embodiment of the present utility model, the perforated support 300 is provided with through holes, and the through holes are linearly arranged on the perforated support 300. The through holes on the perforated support 300 can facilitate the flow of the electrolyte and improve the wettability of the electrolyte. The column of the punching support 300 plays a role in supporting the battery.

In an embodiment of the present utility model, one side of the lower plastic 100 and the aluminum sheet 200 is relatively fixed by the engagement of the boss 110 and the groove 240. The boss 110 enters the groove 240, and the at least two sets of snap-fit bosses 110 and grooves 240 fix the relative positions of the aluminum sheet 200 and the lower plastic 100, so that the aluminum sheet 200 and the lower plastic 100 do not slide relatively.

In one embodiment of the present utility model, one end of the aluminum sheet 200 is provided with a liquid injection hole 210 to facilitate injection of an electrolyte. The other end of the photo-aluminum sheet 200 is provided with a first post hole 220. The lower plastic 100 is provided with mesh holes 120 at the positions corresponding to the injection holes 210 of the aluminum sheet 200, so that the injected electrolyte conveniently passes through the top cover through the mesh holes 120 and enters the battery case. The lower plastic 100 is provided with a second post 400 hole 130 at a position corresponding to the first post hole 220 of the photo-aluminum sheet 200. A post 400 is disposed between the aluminum sheet 200 and the lower plastic 100, and the post 400 penetrates through the first post hole 220 and the second post 400 hole 130. At one end, the photo-aluminum sheet 200 is provided with a first post hole 220 and the lower plastic 100 is provided with a second post 400 hole 130. The other end of the aluminum sheet 200 is provided with a liquid injection hole 210, and the lower plastic 100 is provided with a mesh 120. The pole 400 penetrates through the first pole hole 220 and the first and second pole 400 holes, and a pole lug 500 is fixedly arranged on the pole 400 at one side of the lower plastic 100.

In an embodiment of the present utility model, a tab 500 is disposed at one end of the pole 400 near the lower plastic 100, and a sealing ring is disposed between the pole 400 and the second pole hole 130. In this embodiment, the sealing ring is sleeved on the pole 400 and located between the pole tab 500 and the second pole hole 130, so as to prevent the electrolyte from exuding.

In one embodiment of the present utility model, a square concave surface 230 is disposed on the side of the aluminum sheet 200 away from the lower plastic 100 outside the first pole hole 220. The concave surface 230 is provided with an upper plastic 700, the upper plastic 700 is matched with the concave surface 230, the upper plastic 700 and the concave surface 230 are fixed through at least two ceramic columns 600, and one surface of the upper plastic 700 away from the concave surface 230 is provided with a riveting block 800. The upper plastic 700 is matched with the concave 230, and a through hole matched with the pole 400 is arranged in the middle of the upper plastic 700. The upper plastic 700 is fixed on the aluminum sheet 200 through the post 400 and the ceramic post 600. The middle part of the riveting block 800 is also provided with a through hole matched with the pole 400, and the riveting is fast fixed through the pole 400.

According to the power battery top cover, the boss 110 and the groove 240 are clamped to prevent relative sliding between the aluminum sheet 200 and the lower plastic 100. The perforated support 300 is used to provide support for the battery and to increase the wettability of the electrolyte. Therefore, the utility model effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance. The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. A power cell top cover, comprising:

the lower plastic is provided with at least two bosses;

the aluminum sheet is provided with a groove matched with the boss;

the punching support is fixedly arranged at two ends of the lower plastic and perpendicular to the bottom surface of the lower plastic;

the aluminum sheet is arranged on the upper side of the lower plastic and is connected with the lower plastic, and the punching support is arranged on the left side and the right side of the lower plastic.

2. The power cell top cover of claim 1, wherein the perforated support is provided with through holes, and the through holes are linearly arranged on the perforated support.

3. The power cell top cover of claim 1, wherein the lower plastic and the aluminum sheet are relatively fixed by the engagement of the boss and the groove.

4. The power cell top cover of claim 3, wherein one end of the photo-aluminum sheet is provided with a liquid injection hole, and the other end of the photo-aluminum sheet is provided with a first pole hole.

5. The power cell top cover of claim 4, wherein the lower plastic is provided with mesh openings at the corresponding positions of the aluminum sheet liquid injection holes, and the lower plastic is provided with second pole holes at the corresponding positions of the aluminum sheet first pole holes.

6. The power cell top cover of claim 5, wherein a post is disposed between the aluminum sheet and the lower plastic, the post extending through the first post hole and the second post hole.

7. The power cell top cover of claim 6, wherein a tab is disposed at an end of the post adjacent to the lower plastic, and a seal ring is disposed between the post and the second post hole.

8. The power cell top cover of claim 7, wherein a side of the photo-aluminum sheet remote from the lower plastic is provided with a square concave surface outside the first post hole.

9. The power battery top cover according to claim 8, wherein an upper plastic is arranged on the concave surface, the upper plastic is matched with the concave surface, the upper plastic and the concave surface are fixed through at least two ceramic columns, and a riveting block is arranged on one surface of the upper plastic, which is far away from the concave surface.

10. The power cell top cover of claim 9, wherein the upper plastic and the middle of the rivet block are provided with through holes matching the pole.