CN219226521U

CN219226521U - Top cover and battery with same

Info

Publication number: CN219226521U
Application number: CN202320138316.1U
Authority: CN
Inventors: 杨恒峰; 冯群翔; 占莎; 蒋治亿; 章兵
Original assignee: Trina Energy Storage Solutions Jiangsu Co Ltd
Current assignee: Trina Energy Storage Solutions Jiangsu Co Ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-06-20
Anticipated expiration: 2033-02-07

Abstract

The utility model relates to the technical field of batteries, in particular to a top cover and a battery with the top cover. The utility model relates to a top cover, which is characterized in that a first air hole at a projection position of an explosion-proof valve, namely a first air hole at a bearing plate of a cover plate body, is omitted, and is formed on a lower plastic body, so that the air interaction between the explosion-proof valve and a bare cell is not influenced, and meanwhile, the risk of falling scraps generated when the explosion-proof valve is opened is avoided.

Description

Top cover and battery with same

Technical Field

The utility model relates to the technical field of batteries, in particular to a top cover and a battery with the top cover.

Background

The prior secondary battery top cover mainly comprises a pole column, a sealing ring, a light aluminum sheet, an upper plastic and a lower plastic, wherein the main function of the lower plastic is to provide a space in the height direction for bending positive and negative pole lugs and prevent the positive and negative poles from being shorted, so that three bearing plates are respectively positioned at the positive side, the negative side and the projection position (middle position) of the explosion-proof valve.

Disclosure of Invention

The utility model aims to solve the technical problems that: in order to overcome the technical problems in the prior art, the present utility model provides a top cover, comprising,

the cover plate body, the explosion-proof valve arranged on the cover plate body and the lower plastic arranged at the bottom of the cover plate body, wherein,

the two sides of the lower plastic are provided with first air holes.

Further, two mounting holes are formed on the cover plate body, a positive pole column and a negative pole column are arranged in the mounting holes, wherein,

and the positive pole and the negative pole are both communicated with the bare cell.

Further, annular grooves are formed in the side walls of the mounting holes, and sealing rings are placed in the annular grooves, so that the positive pole column and the negative pole column are insulated from the cover plate body.

Further, a placing groove is arranged on the cover plate body, an explosion-proof patch and the explosion-proof valve are arranged in the placing groove, wherein,

the explosion-proof valve is located below the explosion-proof patch.

Further, the upper surface of the cover plate body is provided with a light aluminum sheet, the light aluminum sheet is provided with a fixing groove, the fixing groove corresponds to the placing groove, the fixing groove and the placing groove are communicated to form an installation cavity, wherein,

the explosion-proof valve is installed in the installation cavity.

Further, the explosion-proof valve is welded and arranged in the mounting cavity.

Further, the lower plastic is extended to the lower side of the cover plate body, wherein,

the first air holes are uniformly formed in the lower plastic body and are formed in the length direction of the lower plastic body.

Further, the cover plate body is also extended downwards with a bearing plate, the bearing plate is positioned below the explosion-proof valve, and a cavity is formed between the bearing plate and the lower plastics on both sides, wherein,

the cavity is suitable for placing the bare cell electrode lug;

second air holes are formed in two sides of the bearing plate;

the height of the downward extension of the bearing plate is consistent with the height of the downward extension of the lower plastic.

Further, one end of the first air hole is communicated with the bare cell, and the other end of the first air hole is communicated with the explosion-proof valve.

Also included is a battery comprising a top cover as described above.

The beneficial effects are that: the utility model relates to a top cover, which is characterized in that a first air hole at a projection position of an explosion-proof valve, namely a first air hole at a bearing plate of a cover plate body, is omitted, and is formed on a lower plastic body, so that the air interaction between the explosion-proof valve and a bare cell is not influenced, and meanwhile, the risk of falling scraps generated when the explosion-proof valve is opened is avoided.

Drawings

FIG. 1 is a cross-sectional view of the overall structure of the present utility model;

FIG. 2 is a schematic view of the structure of the mounting hole of the present utility model;

FIG. 3 is a front elevational view of the overall structure of the present utility model;

in the figure:

100. the anti-explosion valve comprises a cover plate body, 110, an anti-explosion valve, 111, an anti-explosion patch, 120, lower plastic, 121, a first air hole, 130, a mounting hole, 131, a positive pole, 132, a negative pole, 133, a sealing ring, 140, an aluminum sheet, 150, a bearing plate, 151, a cavity, 152 and a second air hole.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the utility model. In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may include one or more of the feature, either explicitly or implicitly. Moreover, the terms "first," "second," and the like, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

Example 1

As shown in fig. 1 to 3, a top cover includes a cover body 100, an explosion-proof valve 110 disposed on the cover body 100, and a lower plastic 120 disposed at the bottom of the cover body 100, wherein first air holes 121 are formed on two sides of the lower plastic 120. The first air hole 121 can realize the gas interaction between the explosion-proof valve 110 and the bare cell, and also avoid the risk that the chips generated when the explosion-proof valve 110 is opened fall into the bare cell, and avoid secondary short circuit.

Two mounting holes 130 are formed in the cover plate body 100, and a positive pole 131 and a negative pole 132 are mounted in the mounting holes 130, wherein the positive pole 131 and the negative pole 132 are both conducted with the bare cell. The positive pole 131 and the negative pole 132 are suitable for being installed in the installation hole 130, and the positive pole 131 and the negative pole 132 are arranged in a conducting way with the bare cell.

The side walls of the mounting holes 130 are respectively provided with a ring groove, and sealing rings 133 are arranged in the ring grooves to insulate the positive electrode column 131 and the negative electrode column 132 from the cover plate body 100. The arrangement of the sealing ring 133 ensures that the positive pole 131 and the negative pole 132 are not contacted with the cover plate body 100, and ensures the insulativity.

The cover plate body 100 is provided with a placing groove, and an explosion-proof patch 111 and an explosion-proof valve 110 are installed in the placing groove, wherein the explosion-proof valve 110 is located below the explosion-proof patch 111. The upper surface of the cover plate body 100 is provided with a light aluminum sheet 140, the light aluminum sheet 140 is provided with a fixing groove, the fixing groove corresponds to the placing groove, and the fixing groove and the placing groove are communicated to form an installation cavity, wherein the explosion-proof valve 110 is installed in the installation cavity. The explosion proof valve 110 is welded in the mounting cavity. The fixing groove on the photo-aluminum sheet 140 is used to assemble the explosion-proof valve 110, the photo-aluminum sheet 140 is assembled on the cap plate body 100, and the explosion-proof valve 110 is welded in the installation cavity formed by the fixing groove and the placing groove to isolate the internal bare cell and the electrolyte from the external air. The explosion proof patch 111 serves to protect the explosion proof valve 110 and prevent foreign materials from entering the inside of the explosion proof valve 110.

The lower plastic 120 extends below the cover plate body 100, wherein the first air holes 121 are uniformly formed in the lower plastic 120 and are formed along the length direction of the lower plastic 120. One end of the first air hole 121 is communicated with the bare cell, and the other end is communicated with the explosion-proof valve 110, so that air interaction between the explosion-proof valve 110 and the bare cell is ensured.

The cover plate body 100 further extends downwards to form a carrier plate 150, the carrier plate 150 is located below the explosion-proof valve 110, and a cavity 151 is formed between the carrier plate 150 and the lower plastic 120 on both sides, wherein the cavity 151 is suitable for placing a bare cell tab; the two sides of the carrier plate 150 are provided with second air holes 152. The height of the downward extension of the carrier plate 150 is identical to the height of the downward extension of the lower plastic 120. The cavity 151 is used for installing the tab, so as to prevent the positive and negative tabs from being inserted into the bare cell to cause short circuit. The explosion-proof valve 110 generates scraps when opened, and the carrying plate 150 is suitable for collecting the generated scraps in the carrying plate 150, so that the scraps are prevented from falling into the bare cell, and secondary short circuit is caused. The carrier plate 150 has a U-shaped cross section to facilitate collection of debris. The second air holes 152 are formed on two sides of the bearing plate 150, and the second air holes 152 communicate the explosion-proof valve 110 with the bare cell to realize gas interaction.

Example two

The utility model also provides a battery comprising the top cover.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims

1. A top cap, characterized in that: comprising the steps of (a) a step of,

the two sides of the lower plastic are provided with first air holes.

2. A cover as defined in claim 1, wherein:

two mounting holes are formed in the cover plate body, a positive pole column and a negative pole column are arranged in the mounting holes, wherein,

3. A cover as claimed in claim 2, wherein:

the side walls of the mounting holes are respectively provided with a ring groove, and sealing rings are arranged in the ring grooves, so that the positive pole column and the negative pole column are insulated from the cover plate body.

4. A cover as defined in claim 1, wherein:

a placing groove is arranged on the cover plate body, an explosion-proof patch and the explosion-proof valve are arranged in the placing groove, wherein,

the explosion-proof valve is located below the explosion-proof patch.

5. A cover as defined in claim 4, wherein:

the upper surface of the cover plate body is provided with a light aluminum sheet, the light aluminum sheet is provided with a fixing groove, the fixing groove corresponds to the placing groove, the fixing groove and the placing groove are communicated to form an installation cavity, wherein,

the explosion-proof valve is installed in the installation cavity.

6. A cover as defined in claim 5, wherein:

the explosion-proof valve is welded in the mounting cavity.

7. A cover as defined in claim 1, wherein:

the lower plastic is arranged to extend to the lower part of the cover plate body, wherein,

8. A cover as defined in claim 7, wherein:

the cover plate body is also extended downwards with a bearing plate, the bearing plate is positioned below the explosion-proof valve, and a cavity is formed between the bearing plate and the lower plastics on both sides, wherein,

the cavity is suitable for placing the bare cell electrode lug;

second air holes are formed in two sides of the bearing plate;

9. A cover as defined in claim 1, wherein:

one end of the first air hole is communicated with the bare cell, and the other end of the first air hole is communicated with the explosion-proof valve.

10. A battery, characterized in that: the battery comprising a top cover according to any one of claims 1 to 9.