Method for testing battery pole piece and mold for preparing battery pole piece

A technology of battery pole pieces and testing methods, which is applied in the field of failure analysis and research of lithium-ion batteries, can solve the problems of current collector damage, dressing residue, and long time-consuming wiping operations, etc., and achieve the effect of simple testing methods
CN108490354BActive Publication Date: 2019-12-20INST OF PHYSICS - CHINESE ACAD OF SCI
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF PHYSICS - CHINESE ACAD OF SCI
Publication Date
2019-12-20

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a battery pole piece testing method and a die for preparing a battery pole piece, and belongs to the field of failure analysis research of lithium ion batteries. A battery is disassembled, pre-treatment is carried out on a double-side battery pole piece, and capacity and impedance testing results of the double-side pole piece after treatment are basically the same with thoseof a single-side pole piece in the disassembled battery. The double-side battery pole piece after disassembling of the battery is sliced directly, rubberizing is carried out after that the pole pieceis processed by the die, single-side treatment is completed for the double-side pole piece, the pole piece is assembled into a button cell form, a charging-discharging curve of a half cell and electromechanical impedance spectra of a full cell and a symmetric cell are measured, and the testing method is simple and accurate.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the research field of failure analysis of lithium ion batteries, in particular to a battery pole piece testing method and a mold for preparing battery pole pieces. Background technique

[0002] As one of the most widely used and largest chemical energy storage technologies, lithium-ion batteries can accurately obtain the main cause of battery failure through failure analysis, which is conducive to preventing safety accidents during battery use and prolonging battery life. Improve the reliability of the battery, and at the same time feed back information to optimize the improvement plan in the process of battery production and preparation.

[0003] Capacity fading is a common manifestation of battery failure. The commonly used failure analysis method after battery disassembly is electrochemical measurement method, including half-cell charge and discharge test, and electrochemical impedance spectroscopy test of full battery and s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More