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Lithium ion secondary cell

A secondary battery, lithium-ion technology, applied in the direction of secondary battery, electrolyte battery manufacturing, non-aqueous electrolyte battery, etc., can solve the problems affecting the electrochemical performance of the battery, reduce irreversible capacity, improve cycle performance, and increase battery capacity Effect

Active Publication Date: 2006-05-17
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water in the battery will have a series of adverse side reactions with the components in the battery, which will seriously affect the electrochemical performance of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Wind the prefabricated positive and negative electrode sheets together with the diaphragm to form a square lithium-ion secondary battery pole core, encapsulate the metal lithium sheet with 0.1% electrolyte weight, and store it in the square battery shell at the same time as the pole core. Among them, the metal lithium sheet is placed at the bottom of the square casing, and the packaging material is ethyl cellulose. Inject the pre-made electrolyte into the battery case, seal it, and make a square lithium-ion secondary battery with a thickness of 4mm, a width of 30mm, and a height of 48mm.

Embodiment 2

[0036] A method similar to that of Example 1 was used, but 0.5% lithium metal flakes by weight of the electrolyte were added.

Embodiment 3

[0038] A method similar to that of Example 1 was used, but 2% of the weight of the electrolyte lithium metal sheet was added.

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PUM

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Abstract

A lithium ion secondary storage cell consists of electrode core component formed by positive electrode, negative electrode and diaphragm. It features that said component is packaged in metal shell together with nonaqueous cell liquor and metal lithium is packaged in package material of metal shell for raising cell volume and for improving cell storage performance.

Description

【Technical field】 [0001] The invention relates to a lithium-ion secondary battery, in particular to a lithium-ion secondary battery comprising an electrode core assembly composed of positive poles, negative poles and separators, the above-mentioned components being packaged in a metal shell together with a non-hydrolytic electrolyte. 【Background technique】 [0002] Due to its high working voltage, high specific energy, no memory effect, no pollution, small self-discharge, and long cycle life, lithium-ion secondary batteries have gradually replaced traditional secondary batteries such as nickel separators and nickel-metal hydride, and have become It is an ideal energy source for modern mobile electronic equipment and communication equipment, such as mobile phones, notebook computers, laptop computers, personal digital assistants (PDA), cameras, digital cameras, etc. [0003] Lithium-ion secondary battery is a Li+ concentration battery, its positive and negative electrodes are...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/058
CPCY02E60/10Y02P70/50
Inventor 沈晞张小兵凡明文
Owner BYD CO LTD
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