source:other news
release time:2023-02-21
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1. Diaphragm
① The diaphragm has poor isolation performance, poor tensile strength and poor uniformity
② Poor electronic insulation
③ Characteristics of diaphragm self-discharge · physical self-discharge or chemical self-discharge · batch occurrence · self-discharge degree close
2. Polar plate
① Characteristics of self-discharge due to powder drop of pole piece and powder drop of pole piece
A. Physical self-discharge
B. The whole batch appears
C. The degree of self-discharge is close to
D. Remove the battery and remove the powder obviously
② Winding dislocation
3. Collecting fluid
① There are burrs in the fluid collection
② There is a sharp edge at the welding point of the pole lug
③ Self-discharge characteristics of current collector · physical self-discharge · individual occurrence · serious self-discharge degree · occurrence of short circuit battery · inconspicuous removal of battery
4. Impurities
① Impurities in electrolyte
② Impurities in the active material of the electrode plate · self-dissociation of the active material of the positive electrode · self-dissociation of the active material of the negative electrode · self-discharge characteristics of the active material of the electrode plate
A. Chemical self-discharge
B. The whole batch appears
C. The degree of self-discharge is related to the state of charge
③ Diaphragm extract
④ Impurity self-discharge characteristics · chemical self-discharge · occurrence of the whole batch · self-discharge degree is close to · battery disassembly is not obvious
5. Other reasons
① External micro short circuit
② Conductive substances deposited on the diaphragm
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