CN219553754U

CN219553754U - Battery cover plate

Info

Publication number: CN219553754U
Application number: CN202321092459.XU
Authority: CN
Inventors: 许飞; 赵永锋; 葛增乐; 杲绍芒; 王昌权; 马红涛; 袁艳艳; 郑娇杰; 邹海永; 许四龙; 孙中华; 胡亚乐; 王富卫
Original assignee: Guangxi Ningfu New Energy Technology Co ltd
Current assignee: Guangxi Ningfu New Energy Technology Co ltd
Priority date: 2023-05-09
Filing date: 2023-05-09
Publication date: 2023-08-18
Anticipated expiration: 2033-05-09

Abstract

The utility model discloses a battery cover plate, which belongs to the technical field of batteries and comprises a cover plate main body, wherein the cover plate main body comprises a first polar column and a second polar column, a welding hole is formed in the first polar column, and the bottom of the welding hole is fixedly connected or integrally formed with a welding part; the cover plate main body is provided with a through hole for accommodating the first pole, the first pole passes through the through hole and is welded with the current collecting piece through a welding part, and the second pole is welded on the welding hole; an insulating layer is arranged between the first pole and the cover plate main body. Through the area increase with second post top surface, at battery pole piece welding process, the welding is more convenient, reduces the degree of difficulty of being connected with other batteries, the welding equipment between a plurality of batteries in the module of being convenient for welding speed improves production efficiency. Meanwhile, the situation that the battery pole piece is welded and is in cold joint or welding leakage is effectively avoided, the quality of the module is ensured, and the yield is improved.

Description

Battery cover plate

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a battery cover plate.

Background

With the development of the age, the use scale of new energy technology and new energy batteries is continuously enlarged, the requirements of the market on the new energy batteries are more and more strict, and especially the requirements on the safety performance of the new energy are more and more high.

In the current new energy technology, the battery generally comprises a case, an electrode assembly mounted inside the case, and positive and negative electrode cap assemblies positioned at the opening of the case. The anode and cathode cap assembly generally includes a cap plate and an insulating plate positioned on a side of the cap plate facing the electrode unit.

Meanwhile, in order to enable the battery to form a module, the casing cover plate is reserved with the pole for convenient connection, but in the prior art, the reserved pole is small in area (the top surface is generally circular with the diameter of 2-5 mm), the welding difficulty is high, the virtual welding and the missing welding can be possibly caused, and the quality of the module after grouping is affected.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides a battery cover plate, which solves the technical problems of inconvenient welding or cold joint caused by too small welding point of a pole piece of a battery.

The purpose of the utility model is realized in the following way: a battery cover plate comprises a cover plate main body, wherein the upper surface of the cover plate main body is fixedly connected with a second pole, and the area of the top surface of the second pole is not less than 50mm ² 。

Further, the top surface of the second pole is round, and the diameter of the second pole is 8mm.

Further, the solar cell further comprises a first polar post, wherein a welding hole is formed in the first polar post, and a welding part is fixedly connected or integrally formed at the bottom of the welding hole; the cover plate main body is provided with a through hole for accommodating the first pole, the first pole passes through the through hole and is welded with the current collecting piece through a welding part, and the second pole is welded on the welding hole; an insulating layer is arranged between the first pole and the cover plate main body.

Further, the second pole is welded at the top of the welding hole, and the area of the second pole is larger than that of the welding part.

Further, the insulating layer is integrally injection molded between the first pole and the cover plate body.

Further, after the second pole is welded on the welding hole, the horizontal height of the top surface of the second pole is not higher than that of the top surface of the first pole.

Further, a first limit groove is formed in the periphery of the first pole.

Further, a second limiting groove is formed in the cover plate main body, the second limiting groove is of an annular structure, and the second limiting groove surrounds the through hole in the cover plate main body.

The utility model has the beneficial effects that: by setting the area of the top surface of the second pole to not less than 50mm ² In the welding process of the battery pole pieces, the welding is more convenient, the difficulty of connection with other batteries is reduced, the welding and the assembly among a plurality of batteries in the module are convenient, the welding speed is accelerated, and the production efficiency is improved. Meanwhile, the situation that the battery pole piece is welded and is in cold joint or welding leakage is effectively avoided, the quality of the module is ensured, and the yield is improved.

Drawings

FIG. 1 is an exploded view of the structure of the present utility model;

FIG. 2 is a top view of the present utility model;

figure 3 is a front cross-sectional view of the utility model at A-A of figure 2.

In the figure: 11. a battery case; 131. a cover plate main body; 1311. a liquid injection hole; 1312. a through hole; 1313. the second limit groove; 132. an insulating layer; 133. a first pole; 1331. a welding part; 1332. a first limit groove; 134. a second post; 14. and a current collecting plate.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings, and it should be noted that all the azimuth words, such as up, down, front, back, left, right, etc., appearing in the present utility model are azimuth words made by taking fig. 1 as a reference drawing, and all the azimuth words do not limit the present utility model, but are used for more clear description and explanation of the present utility model.

Example 1

As shown in fig. 1-3, the present embodiment discloses a battery cover plate, which includes a cover plate main body 131, wherein the cover plate main body 131 includes a first pole post 133 and a second pole post 134, a welding hole is formed on the first pole post 133, and a welding portion 1331 is fixedly connected or integrally formed at the bottom of the welding hole; the cover plate main body 131 is provided with a through hole 1312 for accommodating the first pole 133, the first pole 133 passes through the through hole 1312 and is welded with the current collecting plate 14 by a welding part 1331, and the first poleThe diode 134 is welded on the welding hole; an insulating layer 132 is disposed between the first pole 133 and the cover body 131. The second post 134 is fixedly connected to the upper surface of the cover plate main body 131, and the area of the top surface of the second post 134 is not smaller than 50mm ² And the top surface of the second post 134 is circular, and the diameter of the second post 134 is 8mm.

The present embodiment is achieved by setting the area of the top surface of the second post 134 to be not less than 50mm ² In the welding process of the battery pole pieces, the welding is more convenient, the difficulty of connection with other batteries is reduced, the welding and the assembly among a plurality of batteries in the module are convenient, the welding speed is accelerated, and the production efficiency is improved. Meanwhile, the situation that the battery pole piece is welded and is in cold joint or welding leakage is effectively avoided, the quality of the module is ensured, and the yield is improved.

Example 2

As shown in fig. 1-3, the present embodiment discloses a battery cover plate, which includes a cover plate main body 131, wherein the cover plate main body 131 includes a first pole post 133 and a second pole post 134, a welding hole is formed on the first pole post 133, and a welding portion 1331 is fixedly connected or integrally formed at the bottom of the welding hole; the cover plate main body 131 is provided with a through hole 1312 for accommodating the first pole 133, the first pole 133 passes through the through hole 1312 and is welded with the current collecting piece 14 through a welding part 1331, and the second pole 134 is welded on the welding hole; an insulating layer 132 is disposed between the first pole 133 and the cover body 131. The second post 134 is fixedly connected to the upper surface of the cover plate main body 131, and the area of the top surface of the second post 134 is not smaller than 50mm ² And the top surface of the second post 134 is circular, and the diameter of the second post 134 is 8mm. The top surface of the second pole 134 is circular, the diameter is 8mm, the surface area of the second pole 134 is far larger than 2-5mm used in the prior art, the assembly of module welding is very convenient, the conditions of wrong welding and cold welding can be reduced, and the welding difficulty is reduced.

For better effect, the cover body 131 is circular in shape and is sized to fit the top opening of the battery case 11 to close the battery case 11. The cover plate main body 131 is also provided with a through hole 1312 and a liquid injection hole 1311; the insulating layer 132 is used to isolate the first pole 133 from the cover body 131, and simultaneously isolate the cover body 131 from the current collecting plate 14, so as to ensure insulation therebetween. In order to facilitate the connection and fixation of the cap body 13 and the current collecting tab 14, a welding portion 1331 is provided on the first pole 133, the lower surface of the welding portion 1331 is in contact with the upper surface of the current collecting tab 14, and laser is used to weld from above the welding portion 1331, thereby completing the welding between the first pole 133 and the current collecting tab 14.

For better effect, the cap body 131, the first pole 133, and the insulating layer 132 through the injection molding process are fixed together; before injection molding, the cover plate main body 131 and the first pole 133 are subjected to electrochemical corrosion, and tiny holes are formed on the surfaces of the cover plate main body 131 and the first pole 133, so that the connection strength between the cover plate main body and the insulating layer 132 is increased.

For better effect, the second pole 134 is connected and fixed with the first pole 133 through laser welding, the second pole 134 is placed on the welding hole on the first pole 133, and the laser welding fixes the two, so that the battery can output current outwards.

For better effect, the second post 134 is welded on top of the welding hole, and the area of the second post 134 is larger than that of the welding part 1331.

For better effect, the insulating layer 132 is integrally injection molded between the first pole 133 and the cap body 131. First pole 133 is mounted on cover plate main body 131 according to a set position, then plastic is injected between cover plate main body 131 and first pole 133 to form insulating layer 132, after insulating layer 132 is solidified, cover plate main body 131 and first pole 133 are fixedly connected, and cover plate main body 131 and first pole 133 are fixedly sealed through insulating layer 132 formed by injection molding.

For better effect, the level of the top surface of the second post 134 is not higher than the level of the top surface of the first post 133 after the second post 134 is welded on the welding hole.

For better effect, a first limiting groove 1332 is formed on the outer periphery of the first pole 133.

For better effect, the cover main body 131 is provided with a second limiting groove 1312, the second limiting groove 1313 is in an annular structure, and the second limiting groove 1313 surrounds the through hole 1312 on the cover main body 131.

In the welding process of the battery pole piece, the embodiment is more convenient to weld, reduces the difficulty of being connected with other batteries, facilitates welding and assembling among a plurality of batteries in the module, accelerates the welding speed, and improves the production efficiency. Meanwhile, the situation that the battery pole piece is welded and is in cold joint or welding leakage is effectively avoided, the quality of the module is ensured, and the yield is improved.

The present utility model is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present utility model and the concept thereof, can be replaced or changed equally within the scope of the present utility model.

Claims

1. A battery cover plate comprising a cover plate body (131), characterized in that: the upper surface of the cover plate main body (131) is fixedly connected with a second post (134), and the area of the top surface of the second post (134) is not smaller than 50mm ² 。

2. The battery cover plate according to claim 1, wherein: the top surface of the second pole (134) is round, and the diameter of the second pole (134) is 8mm.

3. The battery cover plate according to claim 1, wherein: the solar cell further comprises a first polar column (133), wherein a welding hole is formed in the first polar column (133), and a welding part (1331) is fixedly connected or integrally formed at the bottom of the welding hole; the cover plate main body (131) is provided with a through hole (1312) for accommodating the first pole (133), the first pole (133) passes through the through hole (1312) and then is welded with the current collecting piece (14) through a welding part (1331), and the second pole (134) is welded on the welding hole; an insulating layer (132) is arranged between the first pole (133) and the cover plate main body (131).

4. A battery cover plate according to claim 3, wherein: the second pole (134) is welded at the top of the welding hole, and the area of the second pole (134) is larger than that of the welding part (1331).

5. The battery cover plate of claim 4, wherein: the insulating layer (132) is integrally injection molded between the first pole (133) and the cover plate body (131).

6. The battery cover plate of claim 5, wherein: after the second pole (134) is welded on the welding hole, the top surface of the second pole (134) is not higher than the top surface of the first pole (133).

7. A battery cover plate according to claim 3, wherein: a first limit groove (1332) is formed in the periphery of the first pole (133).

8. A battery cover plate according to claim 3, wherein: the cover plate body (131) is provided with a second limit groove (1313), the second limit groove (1313) is of an annular structure, and the second limit groove (1313) surrounds a through hole (1312) in the cover plate body (131).