Non-aqueous electrolyte lithium secondary battery

A non-aqueous electrolyte and lithium secondary battery technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve problems such as poor safety performance, achieve the effect of avoiding internal short circuit and improving safety performance

Inactive Publication Date: 2004-08-25
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to improve the problem of poor safety performance of the existing non-aqueous electrolyte lithium secondary battery for power, and provide a non-aqueous electrolyte lithium secondary battery for power with high safety performance

Method used

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  • Non-aqueous electrolyte lithium secondary battery
  • Non-aqueous electrolyte lithium secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The non-aqueous electrolyte lithium secondary battery with a square shell is now used for description, please refer to figure 1 , The non-aqueous electrolyte lithium secondary battery of the present invention comprises pole core 16, support body 8 and 8 ', insulator 3 and 3 ', side pressure plate 10 and battery casing 7.

[0037] Please refer to figure 2 , the pole core 16 is formed by stacking and winding the positive electrode sheet, the diaphragm, and the negative electrode sheet in sequence. In the middle of the pole core 16, two supports 8 and 8 wrapped with hot-melt adhesive sheets 9 are respectively placed between the positive electrode sheet, the negative electrode sheet, and the separator. '. Both support bodies 8 and 8' are plate-shaped. The first function of the above-mentioned support body 8 and 8' is to provide support to the insulator, and the second is to rely on the bonding force of the hot melt adhesive on it to make the central pole piece adhere to ...

Embodiment 2

[0060] Except that the wedge-shaped block θ angle is changed to 2°, the others are the same as in Embodiment 1.

Embodiment 3

[0062] Except that the θ angle of the wedge block is changed to 6°, the others are the same as in Embodiment 1.

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Abstract

This invention relates to a Li secondary battery of non-aqueous liquid electrolyte including a negative pole and a positive pole capable of inlaying and disinlaying the Li ionic battery, membranes and non-aqueous liquid electrolyte housed in a outer shell of the battery, among which, a support is put in the cove composed of positive, negative plates and membranes, side pressure plates are placed at the outside or of the core, pressed by wedge blocks to make the core bend, laterally fixed in the shell by the top and bottom insulators, which has excellent multiplying factor discharge performance and safety performance.

Description

【Technical field】 [0001] The present invention relates to a secondary battery. In particular, it relates to a non-aqueous electrolyte lithium secondary battery with large capacity and excellent high-rate discharge performance suitable for vehicle power. 【Background technique】 [0002] The non-aqueous electrolyte lithium secondary battery uses a carbon-based material that can intercalate and deintercalate lithium ions as the negative electrode active material, and uses LiCoO 2 , LiNiCoO 2 , LiMnO 4 After a lithium-containing transition metal oxide is used as the positive electrode active material and an electrolyte whose solute is metal lithium salt is used as the electrolyte to make a battery, lithium ions from the positive electrode active material enter and exit the carbon particles to perform charge and discharge. [0003] Based on environmental protection and other reasons, the market of electric bicycles and electric vehicles is developing rapidly. Lithium-ion batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/50H01M4/52H01M4/58H01M10/36H01M10/38H01M10/40
CPCH01M4/505Y02E60/122H01M4/525H01M10/0525H01M10/38H01M4/485Y02E60/10Y02P70/50
Inventor 谭伟华王传福董俊卿张金涛付才林
Owner BYD CO LTD
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