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Causes and characteristics of self-discharge of Ni-MH battery

source:other news release time:2023-02-21 Hits:0     Popular:Lithium-ion battery wholesale

  LiFePO4 battery pack (84).jpg

  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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