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Battery cell pole sheet and battery cell

A pole piece and battery cell technology, which is applied in the field of battery production, can solve the problem of over-thickness of the pole piece glue, achieve the effect of improving safety, increasing volume energy density, and avoiding the safety risk of lithium analysis

Pending Publication Date: 2020-01-24
HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a battery pole piece for the deficiencies of the prior art, which solves the problem of super-thick glue on the pole piece after winding, helps to reduce the overall thickness of the battery cell, and improves the battery life. energy density, thereby improving the quality of the battery

Method used

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  • Battery cell pole sheet and battery cell
  • Battery cell pole sheet and battery cell
  • Battery cell pole sheet and battery cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as Figure 1~4 As shown, a battery pole piece includes a pole piece and a pole piece. The pole piece is provided with a coating area 1 and an empty foil area 2. The pole piece is accommodated in the empty foil area 2. The pole piece is covered with a first insulating glue 3 The coating area 1 is provided with several grooves 4 at intervals to cooperate with the first insulating glue 3 , the first insulating glue 3 is accommodated in the grooves 4 , and the bottom surface of the grooves 4 is provided with a second insulating glue 5 . In the manufacturing process of the existing lithium-ion batteries, in order to avoid the problem of lithium precipitation during the charging process of the positive and negative electrodes and reduce the potential safety hazard, an auxiliary adhesive tape will be pasted on the positive and negative electrodes themselves to prevent the insertion of lithium ions. At the same time, in order to protect the thinner area of ​​the coating, t...

Embodiment 2

[0039] Such as Figure 1~4 Shown, a kind of electric core, comprises separator and the anode sheet 6 and cathode sheet 7 that are made of above-mentioned electric core pole sheet, anode sheet 6, cathode sheet 7 pole separators are wound to form electric core, the anode sheet 6 The empty foil area 2 and the empty foil area 2 of the cathode sheet 7 are staggered, the empty foil area 2 of the anode sheet 6 is welded with a negative electrode ear 8, the empty foil area 2 of the cathode sheet 7 is welded with a positive electrode ear 9, and the anode sheet 6 corresponds to the positive electrode ear 9 is provided with a groove 4, and the position of the cathode sheet 7 corresponding to the negative tab 8 is provided with a groove 4.

[0040] It should be noted that: the empty foil area 2 of the anode sheet 6 and the empty foil area 2 of the cathode sheet 7 are staggered to prevent the negative tab 8 and the positive tab 9 from overlapping together, and prevent the short circuit bet...

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Abstract

The invention belongs to the technical field of battery production and relates to a battery cell pole sheet. The battery cell pole sheet comprises a pole sheet and tabs; the pole sheet is provided with a coating area and an empty foil area; the tabs are accommodated in the empty foil area; the tabs are covered with first insulating paste; a plurality of grooves matched with the first insulating paste are formed in the coating area at intervals; the first insulating paste is accommodated in the grooves; and second insulating paste is arranged at the bottom surfaces of the grooves. With the battery cell pole sheet of the invention adopted, the problem that the paste application positions of wound pole sheets are too thick can be solved; the overall thickness of a battery cell is reduced; theenergy density of a battery is improved; and the quality of the battery can be improved. The invention also discloses a battery cell.

Description

technical field [0001] The invention belongs to the technical field of battery production, and in particular relates to a battery pole piece and a battery. Background technique [0002] Nowadays, all countries are vigorously developing green and high-efficiency secondary batteries. As a new type of secondary battery, lithium-ion batteries have the advantages of high energy density and power density, high working voltage, light weight, small size, long cycle life, good safety, and environmental protection. They are widely used in portable appliances, electric tools, large Energy storage, electric transportation power supply and other aspects have broad application prospects. [0003] In the manufacturing process of existing lithium-ion batteries, in order to avoid the problem of lithium deposition during the charging process of the positive and negative electrodes and reduce the potential safety hazard, an auxiliary adhesive tape is pasted on the positive and negative electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M4/13H01M10/0587H01M50/538
CPCH01M4/13H01M10/0587H01M50/538Y02E60/10Y02P70/50
Inventor 屈永辉纪荣进郑明清陈杰李载波杨山
Owner HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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