Rectangular lithium battery with improved packing structure

A packaging structure, lithium battery technology, applied in structural parts, battery pack parts, circuits, etc., can solve the problems of cell shaking, pole piece staggering, and the force cannot be completely consistent, so as to improve safety performance and improve product quality. quality effect

CN102769110AInactive Publication Date: 2012-11-07赵宽 +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2012-11-07
Estimated Expiration
Not applicable · inactive patent

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    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a rectangular lithium battery with an improved packing structure. One end of a rectangular shell of the rectangular lithium battery is fixed with a reinforcing plate. An electrical contact and a safety valve are fixed on the reinforcing plate. One side perpendicular to the reinforcing plate is an opened wide mouth, through which a wound or laminated electrical core can be parallely filled into the rectangular shell. After the electrical core enters the shell, peripheries of the shell bottom and the rectangular shell's opened wide mouth are welded and sealed. The process of the electrical core entering the shell is performed without extrusion and pressure, and dislocation of anode and cathode pieces will not be caused. By the improvement of the packing structure of the rectangular lithium battery, security hidden danger caused by disadvantages of an assembly technology can be avoided, and safety performance of lithium battery can be raised.
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Description

technical field

[0001] The invention relates to a lithium battery, in particular to a rectangular lithium battery with an improved packaging structure. Background technique

[0002] The existing lithium battery shapes and structures include cylindrical lithium batteries, rectangular lithium batteries, and aluminum-plastic composite film soft-pack lithium batteries. Tight packaging structure sealing, rectangular lithium battery is made of coiled or laminated cells into a rectangular metal shell, sealed by laser welding package structure, aluminum-plastic composite film soft package lithium battery is made of coiled or laminated cells It is sealed by aluminum-plastic composite film through hot-melt packaging structure. These structural forms have their own advantages and disadvantages. Among them, the problem of rectangular lithium battery is particularly prominent in the technical solution of winding or laminating cells into rectangular metal shells. The process of laminatin...

Examples

Embodiment Construction

[0018] refer to figure 1 , the positive and negative electrical contacts 3 and the safety valve 4 are fixed on the reinforcing plate 7 at the end of the rectangular shell 1;

[0019] refer to figure 2 , the battery cell 5 is loaded into the wide opening of the rectangular shell 1; the coiled or laminated battery core 5 is placed parallel to the wide opening of the rectangular shell 1 into the shell, and one end of the electrical connecting piece 8 is connected to the electrical connection The contact 3 is connected, and one end is connected to the cell 5;

[0020] refer to image 3 , Figure 4 , the bottom of the shell 2 is in the direction of the wide mouth of one side perpendicular to the plane of the reinforcement plate 7 fixed on the end of the rectangular shell 1, and the four sides of the bottom of the shell 2 are welded and sealed with the wide mouth of the rectangular shell 1 around.