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Lithium-ion battery with pneumatic anti-gas-expansion automatic liquid replenishing device

An automatic liquid replenishment device and lithium-ion battery technology, applied in the direction of battery components, electrolyte storage battery manufacturing, non-aqueous electrolyte storage battery, etc., can solve the problems of large electrolyte consumption, restriction of practical application, safety performance cannot be guaranteed, etc. Achieve the effects of preventing safety accidents, improving safety performance, ensuring cycle performance and rate performance

Active Publication Date: 2016-03-30
WANXIANG 123 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a power battery, lithium-ion batteries have outstanding advantages such as excellent cycle performance and long cycle life compared with traditional batteries. It will consume a large amount of electrolyte, which will affect the rate performance and cycle performance of the battery. If it is used as a power battery, the minimum safety performance cannot be guaranteed, which greatly restricts its practical application.
In order to solve this problem, people in related fields have adopted methods such as material coating, electrolyte formula improvement, and battery formation process improvement to prevent the flatulence of lithium-ion batteries. Although improvements and optimizations have been made to a certain extent, it still cannot completely make it no flatulence
[0004] Since the existing technology cannot realize that the lithium-ion battery does not have flatulence at all in a short period of time, we might as well solve this problem from the perspective of how to avoid safety accidents caused by battery flatulence

Method used

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  • Lithium-ion battery with pneumatic anti-gas-expansion automatic liquid replenishing device
  • Lithium-ion battery with pneumatic anti-gas-expansion automatic liquid replenishing device
  • Lithium-ion battery with pneumatic anti-gas-expansion automatic liquid replenishing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 Shown: a lithium-ion battery equipped with a pneumatic anti-flatulence automatic liquid replenishment device, including a battery case 1, a battery top cover plate 2, a positive pole 3, a negative pole 4, and a positive pole inside the battery shell. The battery cell is composed of a negative electrode sheet, a diaphragm and an electrolyte. The inside of the battery case is divided into three chambers. The three chambers are respectively the cell chamber 11, the spare electrolyte chamber 12 and the A gas buffer chamber 13, the spare electrolyte chamber is equipped with a spare electrolyte, and the spare electrolyte in the spare electrolyte chamber contains a gas scavenger. An insulating sleeve 22 is provided on the outer wall of the positive pole column and the outer wall of the negative pole pole located between the spare electrolyte chamber and the gas buffer chamber. A fixed partition 14 is used to separate the cell chamber and the spare electrolyte...

Embodiment 2

[0023] Such as figure 2 Shown: a lithium-ion battery equipped with a pneumatic anti-flatulence automatic liquid replenishment device, including a battery case, a battery top cover, a positive pole, a negative pole, and a positive pole piece and a negative pole piece arranged inside the battery shell. , diaphragm and electrolyte, the inside of the battery case is divided into three chambers, and the three chambers are from the top of the battery from bottom to top, respectively, the cell chamber, the spare electrolyte chamber and the gas buffer chamber. A standby electrolyte is housed in the standby electrolyte cavity, and the standby electrolyte in the standby electrolyte cavity contains a gas eliminating agent. An insulating sleeve is provided on the outer wall of the positive pole column and the outer wall of the negative pole pole located between the spare electrolyte chamber and the gas buffer chamber. The part that separates the cell chamber and the spare electrolyte ch...

Embodiment 3

[0026] Such as image 3 Shown: a lithium-ion battery equipped with a pneumatic anti-flatulence automatic liquid replenishment device, including a battery case, a battery top cover, a positive pole, a negative pole, and a positive pole piece and a negative pole piece arranged inside the battery shell. , diaphragm and electrolyte, the inside of the battery case is divided into three chambers, and the three chambers are from the top of the battery from bottom to top, respectively, the cell chamber, the spare electrolyte chamber and the gas buffer chamber. A standby electrolyte is housed in the standby electrolyte cavity, and the standby electrolyte in the standby electrolyte cavity contains a gas eliminating agent. An insulating sleeve is provided on the outer wall of the positive pole column and the outer wall of the negative pole pole located between the spare electrolyte chamber and the gas buffer chamber. The part that separates the cell chamber and the spare electrolyte cha...

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Abstract

The invention relates to the technical field of safety of lithium-ion batteries, and discloses a lithium-ion battery with a pneumatic anti-gas-expansion automatic liquid replenishing device. The lithium-ion battery comprises a battery shell, a battery top cover board, a positive pole, a negative pole and a battery core, wherein the battery core is arranged in the battery shell; the inside of the battery shell is divided into a battery core cavity, a backup electrolyte cavity and a gas buffer cavity; the backup electrolyte cavity is filled with a backup electrolyte; a fixed partition plate is used for partitioning the battery core cavity and the backup electrolyte cavity; a pneumatic elastic film is used for partitioning the backup electrolyte cavity and the gas buffer cavity; a one-way valve A is arranged on the fixed partition plate; one-way valves B are arranged on the fixed partition plate and the pneumatic elastic film; a one-way exhaust valve is arranged on the battery top cover board; and breathable moisture absorption layers are arranged at air inlets of the one-way valve A located at the bottom of the fixed partition plate and the one-way exhaust valve. According to the lithium-ion battery with the pneumatic anti-gas-expansion automatic liquid replenishing device, the potential safety hazard caused by battery gas expansion can be effectively solved; and the electrolyte can be automatically replenished timely.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery safety, in particular to a lithium ion battery equipped with a pneumatic anti-flatulence automatic liquid replenishment device. Background technique [0002] With the gradual strengthening of people's awareness of environmental protection and the non-renewability of global oil, the development of new energy vehicles is becoming more and more popular, especially electric vehicles have been greatly developed. [0003] As a power battery, lithium-ion batteries have outstanding advantages such as excellent cycle performance and long cycle life compared with traditional batteries. It will consume a large amount of electrolyte, which will affect the rate performance and cycle performance of the battery. If it is used as a power battery, the minimum safety performance cannot be guaranteed, which greatly restricts its practical application. In order to solve this problem, people in related fi...

Claims

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Application Information

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IPC IPC(8): H01M2/36H01M10/058H01M50/317H01M50/609H01M50/673
CPCY02E60/10Y02P70/50
Inventor 杜小红
Owner WANXIANG 123 CO LTD
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