Quantitative analysis method of electrolyte consumption

A quantitative analysis, electrolyte technology, applied in the field of electrolyte analysis, to achieve the effect of strong repeatability and simple operation

Active Publication Date: 2016-03-30
DONGGUAN AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no literature reports documenting the quantitative analysis of electrolyte consumption in batteries

Method used

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  • Quantitative analysis method of electrolyte consumption
  • Quantitative analysis method of electrolyte consumption
  • Quantitative analysis method of electrolyte consumption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] (1) select internal standard substance: according to the component contained in the electrolyte solution 1 of battery 1, select internal standard substance to be cyclohexylbenzene;

[0082] (2) Perform the first pretreatment and the second pretreatment on the two used batteries 1 respectively.

[0083] 1) Two used batteries 1 were obtained through the following charge / discharge cycles:

[0084]Each battery 1 was subjected to the following charge / discharge cycle: at 25°C, the battery 1 was first charged to 4.2V with a constant current of 1C, further charged with a constant voltage of 4.2V to a current of 0.025C, and then charged with a constant current of 1C to 0.025C. The constant current discharges the battery to 3.0V, which is a charge-discharge cycle process. The battery can be charged / discharged 100 times in the above manner,

[0085] 2) Perform the first pretreatment on a battery 1 obtained through the above step 1):

[0086] Disassemble the used battery 1, quic...

Embodiment 2

[0105] (1) Select internal standard: according to the components contained in the electrolyte solution 2 of battery 2, select internal standard to be ethyl acetate;

[0106] (2) Carry out the first pretreatment and the second pretreatment respectively to two used batteries 2:

[0107] 1) Two used batteries 2 were obtained through the following charge / discharge cycles:

[0108] Each battery 1 was subjected to the following charge / discharge cycle: at 25°C, the battery 1 was first charged to 4.2V with a constant current of 1C, further charged with a constant voltage of 4.2V to a current of 0.025C, and then charged with a constant current of 1C to 0.025C. The constant current discharges the battery to 3.0V, which is a charge-discharge cycle process. The battery can carry out 300 charge / discharge cycles according to the above method,

[0109] 2) Carry out the first pretreatment to a battery 2 obtained through the above step 1):

[0110] Disassemble the used battery 2, quickly wi...

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Abstract

The invention relates to a quantitative analysis method of electrolyte consumption. The method comprises the following steps: selecting an internal standard substance; respectively carrying out a centrifuging method and a soaking method on two groups of parallel used batteries to obtain a first to-be-detected electrolyte and a second to-be-detected electrolyte; and detecting and calculating: respectively detecting the first to-be-detected electrolyte and the second to-be-detected electrolyte and then calculating respective consumption of all components of the electrolytes. The quantitative analysis method of electrolyte consumption is simple to operate and high in repeatability; the method can be used for obtaining the consumption of each component of electrolyte in a used battery, thereby providing a powerful support for injection of electrolyte in required amount during the process of battery preparation.

Description

technical field [0001] The present application relates to the field of electrolyte analysis, in particular to a quantitative analysis method for electrolyte consumption. Background technique [0002] The electrolyte is the medium used in chemical batteries, electrolytic capacitors, etc. The electrolyte provides ions for their normal work and ensures that the chemical reactions that occur during work are reversible. In lithium batteries, which are more and more widely used, choosing a suitable electrolyte is the key to obtain lithium batteries with excellent performance. The electrolyte mainly consists of organic solvents, lithium salts and additives. When preparing a lithium battery, the wound cell is placed in an outer package, and the selected electrolyte is injected. [0003] In practical applications, as the lithium battery is used repeatedly, the electrolyte in the lithium battery will be consumed. In order to ensure that an appropriate amount of electrolyte is added...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42
CPCH01M10/42Y02E60/10
Inventor 张晓茹郭佳丽李乐华
Owner DONGGUAN AMPEREX TECH
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