Method for detecting distribution of lithium ion battery negative electrode binder in electrode sheet

A technology of lithium ion battery and detection method, which is applied in the direction of material analysis, measurement device, analysis material, etc. using wave/particle radiation, can solve the problems of reduced adhesion and peeling of negative electrode materials, and achieves the effect of simple and fast operation.

Inactive Publication Date: 2018-03-23
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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Problems solved by technology

When the negative electrode is coated, there is a risk that the binder (SBR) will float up with the evaporation of water during the drying process. The floating of SBR will lead to a decrease in the adhesion of the negative electrode material, which will be used in the subsequent manufacturing process and the cycle process of the finished battery. In case of stripping

Method used

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  • Method for detecting distribution of lithium ion battery negative electrode binder in electrode sheet
  • Method for detecting distribution of lithium ion battery negative electrode binder in electrode sheet
  • Method for detecting distribution of lithium ion battery negative electrode binder in electrode sheet

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Embodiment Construction

[0019] refer to figure 1 A method for detecting the distribution of a lithium-ion battery negative electrode binder in a pole piece proposed by the present invention includes the following steps.

[0020] S1. Obtain the lithium battery negative electrode sheet 2 and paste it on the silicon wafer 1 through the conductive adhesive 3 .

[0021] S2. Cutting the negative electrode sheet 2 to obtain a section of the negative electrode sheet 2 fixed on the silicon wafer 1, and the silicon wafer 1 and the section of the electrode sheet form an assembly. This step also includes: for the obtained assembly, bonding the negative electrode sheet 2 on the silicon wafer 1 through the adhesive tape 4 , and part of the negative electrode sheet 2 is exposed outside the adhesive tape 4 . In this way, double-layer fixing of the negative electrode sheet 2 and the silicon wafer 1 in the section through the adhesive tape 4 and the conductive glue 3 is beneficial to ensure the flatness of the sectio...

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Abstract

The invention discloses a method for detecting the distribution of a lithium ion battery negative electrode binder in an electrode sheet. The binder on a cross section is dyed, and the distribution ofthe binder on the cross section is obtained through element analysis.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a method for detecting the distribution of a lithium-ion battery negative electrode binder in a pole piece. Background technique [0002] Lithium-ion battery is a rechargeable battery with high working voltage, high energy density, low self-discharge rate, long cycle life and environmental friendliness. It is widely used in digital products, automotive power batteries and large energy storage equipment. It is a new The backbone of the energy industry. [0003] Lithium-ion batteries mainly use the back and forth transfer of lithium ions between the positive and negative electrodes to realize the charging and discharging process. The positive and negative electrodes repeatedly intercalate and deintercalate lithium ions. The performance of ion batteries plays a crucial role. When the negative electrode is coated, there is a risk that the binder (SBR) will float up wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/00G01N1/28G01N1/30
Inventor 王晓燕宫璐吴洋洋邵亚运
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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