CN211507757U

CN211507757U - Power battery's utmost point post, apron subassembly and power battery

Info

Publication number: CN211507757U
Application number: CN202020379193.7U
Authority: CN
Inventors: 卢永强; 张勇杰
Original assignee: China Aviation Lithium Battery Co Ltd; China Aviation Lithium Battery Research Institute Co Ltd
Current assignee: Avic Innovation Technology Research Institute Jiangsu Co ltd; China Aviation Lithium Battery Co Ltd; China Lithium Battery Technology Co Ltd; CALB Technology Co Ltd
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-09-15
Anticipated expiration: 2030-03-23

Abstract

The utility model provides a power battery's utmost point post, apron subassembly and power battery. The pole column comprises a metal sheet and a metal cylinder fixedly connected with the metal sheet, the axis of the metal cylinder is perpendicular to the surface of the metal sheet, and a through hole is formed in the metal sheet. The utility model discloses an at power battery's utmost point post, apron subassembly or power battery, because the sheetmetal of utmost point post is provided with the through-hole, can reduce local area of overflowing, the effect that fuses when the short circuit played the fuse improves power battery's security.

Description

Power battery's utmost point post, apron subassembly and power battery

Technical Field

The utility model belongs to the chemical power source field, concretely relates to power battery's utmost point post, apron subassembly and power battery.

Background

Lithium power batteries have become an ideal power source for modern vehicles due to their advantages of no pollution, low cost, high capacity, long cycle life, etc. When the power battery is used in modern vehicles, higher requirements are placed on the safety of the battery.

SUMMERY OF THE UTILITY MODEL

In order to improve the safety of the power battery, the utility model provides a power battery's utmost point post, apron subassembly and power battery.

An aspect of the utility model provides a power battery's utmost point post, including the sheetmetal and with sheetmetal fixed connection's metal cylinder, be provided with the through-hole on the sheetmetal, the through-hole set up in the sheetmetal with locate outside the cylinder connecting portion.

The utility model discloses another aspect provides a power battery's apron subassembly including above-mentioned power battery utmost point post.

The utility model discloses another aspect provides a power battery, including above-mentioned utmost point post or above-mentioned apron subassembly.

The utility model discloses an at power battery's utmost point post, apron subassembly or power battery, because the sheetmetal of utmost point post is provided with the through-hole, can reduce local area of overflowing, the effect that fuses when the short circuit played the fuse improves power battery's security.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a sectional view of a pole according to an embodiment of the present invention.

Fig. 2 is a plan view of a pole according to an embodiment of the present invention.

Fig. 3 is a partial cross-sectional view of a cover plate assembly according to an embodiment of the present invention.

Fig. 4 is a partial cross-sectional view of a cover plate assembly according to another embodiment of the present invention.

Fig. 5 is a partial sectional view of a power battery according to an embodiment of the present invention.

Fig. 6 is a partial cross-sectional view of a power cell according to another embodiment of the present invention.

Wherein the reference numerals are as follows:

1-cover plate; 2-a metal sheet; 3-sealing glue; 4-an insulating sleeve; 5-a column; 6-through holes; 7-Current collector

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers are exaggerated for clarity. The same reference numerals denote the same or similar structures in the drawings, and thus detailed descriptions thereof will be omitted.

The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention. The utility model discloses well "connect" includes direct connection and indirect connection.

As shown in fig. 1 and 2, the utility model discloses a power battery's utmost point post includes sheetmetal 2 and with sheetmetal 2 fixed connection's metal cylinder 5, is provided with through-hole 6 on sheetmetal 2, and through-hole 6 sets up in any position outside sheetmetal 2 and the 5 connecting portion of cylinder. The fixed connection between the metal column 5 and the metal sheet 2 can be any angle connection, and the invention is illustrated in the drawings by only taking the case that the axis of the metal column 5 is perpendicular to the surface of the metal sheet 2, but the invention is not intended to be limited thereto. The connection of the metal column 5 to the metal sheet 2 may be a fixed connection of the metal column 5 through the metal sheet 2.

The metal cylinder 5 may have a cylindrical shape, a prismatic shape, or the like. The metal sheet 2 is fixedly and electrically connected with the metal column 5, and the through hole 6 is arranged at any position on the metal sheet 2 except the connecting part of the metal sheet 2 and the column 5, so that the local over-current area can be reduced, the fuse wire is fused during short circuit, and the safety of the power battery is improved. The metal sheet 2 and the metal column 5 can be integrated and are directly manufactured by punching a plate and a bar; or the two parts can be separated and connected by friction welding or laser welding.

Fig. 3 and 4 show the cover plate assembly of the present invention, including the pole and the cover plate 1. Wherein the pole column comprises a metal sheet 2 and a metal column body 5 fixedly connected with the metal sheet 2, and a through hole 6 is arranged on the metal sheet 2 except the connecting part of the metal sheet 5 and the column body 2. The cover plate 1 is provided with a through hole, the column body 5 of the pole column penetrates through the through hole of the cover plate, and one surface of the metal sheet 2 of the pole column is fixedly connected with the surface of the cover plate 1 through the sealing glue layer 3. Fig. 3 shows an embodiment of the cover plate assembly in which the pole is of unitary construction. Fig. 4 shows another embodiment of the cover assembly in which the pole is a split structure.

The sealant layer 3 may be a hot melt sealant layer. The cover plate 1 and the metal sheet 2 are directly connected through hot melting sealant in a hot pressing mode, and the sealing glue layer 3 plays roles in insulating, sealing and fixing. The sealant layer 3 may be any insulating hot-pressing adhesive, such as one or more of modified polypropylene (PP), modified ethylene-vinyl acetate copolymer (EVA), butyl rubber, polyisobutylene, etc. Preferably, the sealant layer 3 has a thickness of 0.05 to 0.3 mm.

The outer surface of the column body 5 of the pole is provided with an insulating sleeve to be insulated from the cover plate 1. The insulating sleeve can be a plastic insulating sleeve.

The utility model discloses still protect a power battery including above-mentioned utmost point post or apron subassembly. Fig. 5 shows a power battery of an embodiment, the metal sheet 2 of the pole is arranged outside the power battery for connecting with an external circuit, and the column body 5 is electrically connected with the pole ear of the power battery through the current collector 7. Because the metal sheet 2 of utmost point post is provided with through-hole 6, can reduce local overcurrent area, the effect that fuses when the short circuit played the fuse improves power battery's security. Meanwhile, the metal sheet 2 is arranged outside the power battery, so that the metal sheet cannot fall into the shell after being locally fused, the short circuit inside the battery core is avoided, and the safety is further improved. Further, the utility model discloses utilize sealed glue to act as sealed insulating and fixed dual function, can only adopt one step of hot pressing technology to accomplish utmost point post equipment, simple process, the part is few, can reduce apron subassembly cost.

Fig. 6 shows a power battery according to another embodiment, in which the metal sheet 2 of the pole is disposed inside the power battery and electrically connected to the pole ear of the power battery through the current collector 7, and the column 5 is exposed for connection to an external circuit. Because the metal sheet 2 of utmost point post is provided with through-hole 6, can reduce local overcurrent area, the effect that fuses when the short circuit played the fuse improves power battery's security. Furthermore, the sealant is used for sealing, insulating and fixing, the pole can be assembled by adopting a hot pressing process, the process is simple, the number of parts is small, and the cost of the cover plate assembly can be reduced.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a power battery's utmost point post, its characterized in that, including the sheetmetal and with sheetmetal fixed connection's metal cylinder, be provided with the through-hole on the sheetmetal, the through-hole set up in the sheetmetal with the department outside the cylinder connecting portion.

2. The pole of the power battery as claimed in claim 1, wherein the metal sheet and the metal cylinder are integrated or separated.

3. A cover plate assembly for a power battery, comprising the pole of claim 1 or 2.

4. The cover plate assembly of a power battery according to claim 3, comprising:

the apron is provided with the through-hole, utmost point post the cylinder runs through the through-hole of apron, utmost point post a sheetmetal surface with the apron surface is through sealing glue layer fixed connection.

5. The cover plate assembly of a power battery according to claim 4, wherein the sealant layer is a hot melt sealant layer.

6. The cover plate assembly of a power battery according to claim 5, wherein the hot melt sealant layer is formed of one of modified polypropylene, modified ethylene vinyl acetate copolymer, butyl rubber, and polyisobutylene.

7. The cover plate assembly for a power battery according to claim 4, wherein the thickness of the sealant layer is 0.05-0.3 mm.

8. A power cell comprising a post according to claim 1 or 2 or a cover plate assembly according to any one of claims 3 to 7.

9. The power battery of claim 8, wherein the metal sheet of the pole is disposed outside the power battery, and the post is electrically connected to a tab of the power battery.

10. The power battery of claim 8, wherein the metal sheet of the pole is disposed inside the power battery and electrically connected to a tab of the power battery.