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Quadratic core of lithium ion battery and fabricating method

A lithium-ion battery, square technology, applied in the manufacture of electrolyte batteries, secondary batteries, and final product manufacturing, etc., can solve the problems of large influence of subsequent processes, difficult process, heavy workload, etc., to improve production efficiency and simplify products. Process, the effect of reducing requirements

Inactive Publication Date: 2005-11-16
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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Problems solved by technology

The winding battery core structure has the highest utilization rate of the pole piece substrate, less diaphragm usage, and high battery specific energy, but its process starting point is high, the requirements are strict, the subsequent process is greatly affected, and the process is difficult; the laminated battery core structure uses Double the diaphragm, the process is simple, and the follow-up process is improved, but the workload is heavy, and the assembly requirements for the battery core into the shell are high

Method used

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  • Quadratic core of lithium ion battery and fabricating method

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Embodiment 1

[0014] Refer to attached figure 1 , the structure of the square lithium ion battery core is negative electrode copper foil 1; positive electrode aluminum foil 2; diaphragm 3; negative electrode active material 4; positive electrode active material 5.

[0015] A method for manufacturing a square lithium-ion battery core, using a positive electrode aluminum foil 2 with double-sided positive electrode active materials 5 and a negative electrode copper foil 1 coated with negative electrode active materials 4 at intervals on one side, and using a slitting machine to cut according to the designed battery core height For the above two kinds of plates, place the positive aluminum foil 2 between the two layers of separators 3, and stick the surface of the two negative electrode copper foils 1 with the negative electrode active material 4 on the other two sides of the two layers of separators 3 so that they are stacked together. The respective offsets of the positive and negative tabs a...

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Abstract

Battery core is made by following steps: inserting plate with a pole ear and coated active material on both sides into middle of two layers of diaphragm; preparing two sheets of plate with a pole ear and coated active material on single side; with the side coated by active material being faced to diaphragm, adhibiting the two sheet of plate onto diaphragm; consecutive folding the combination of plate and diaphragm in zigzag repeatedly; through testing, packing and enwrapping procedures so as to produce quadrate battery core. Features are: simplifying technique, raising production efficiency, suitable to volume production.

Description

technical field [0001] The invention belongs to the technical field of prismatic lithium-ion batteries, in particular to a prismatic lithium-ion battery core and a manufacturing method thereof. Background technique [0002] At present, there are two types of high-capacity lithium-ion battery core structures: winding type and laminated type, and the pole pieces are double-sided coated electrode materials. The winding battery core structure has the highest utilization rate of the pole piece substrate, less diaphragm usage, and high battery specific energy, but its process starting point is high, the requirements are strict, the subsequent process is greatly affected, and the process is difficult; the laminated battery core structure uses Twice the diaphragm is used, the process is simple, and the follow-up process is improved, but the workload is heavy, and the assembly requirements for the battery core into the shell are high. Contents of the invention [0003] In order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/058
CPCY02E60/10Y02P70/50
Inventor 白杨孙毅谭玲生田爽
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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