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Cause Analysis of Common Fault Issues and Generation of Lithium Battery

Return Listsource:Gratene date: 2022-06-17

Cause Analysis of Common Fault Issues and Generation of Lithium BatteryThe common fault and causes of lithium batteries are mainly as follows:

1, low battery capacity

Cause: a. The amount of attachment is small; b. The amount of polar flakes differ from the difference between the attachment; C. Censions breakage; d. Electrolyte less; E. Electrolytic liquid conductivity is low; f. Positive and negative block Not equipped; g. The diaphragm porosity is small; h. Adhesive aging → Attachment falls; i. Colloids ultra-thick (unsubstantially not penetrated) J. Posage is not fully charged; k. Positive and negative The material is small.

2, battery resistance increase

Cause: a. Negative electrode sheet and extortion; b. Positive electrode tablets and extorted soldel; c. Positive ear and cap duly welding; d. Negative ear and shell deficiency; e. Rivet and pressure plate contact ; F. Positive Negative electrical appliance; g. There is no lithium salt in electrolyte; h. The battery has been short-circuited; i. The diaphragm paper porosity is small.

3, battery voltage is low

cause:

a. Depression (electrolytic solution decomposition; positive impurities; water); b. Unification (SEI film does not form safety); c. Customer’s circuit board leakage (refer to the battery that is sent back after processing); D The customer did not print (the core after the process); E. burr; f. Micro short circuit; g. The negative electrode produces dendrites.

4. The following points have the following reasons for ultra-thickness:

a. Weld leakage; B. Electrolytic solution decomposition; c. No dry water; D. Cap sealing is poor; E. Shell wall is too thick; f. Shell is too thick; g. Coil is too thick (too much) The pole is not compacted; the diaphragm is too thick).

5, battery changes into an abnormal

a. The unified formation (SEI film is incomplete, dense); b. baking temperature is too high → adhesive aging → deprive; C. The negative electrode is low; d. Positive electrode atmosphere and negative attachment; E Air leakage, weld leakage; F. Electrolytic solution decomposition, and electrical conductivity decrease.

6, battery explosion

A. The distribution cabinet has failed (caused by supercharge); b. Diaphragm closed effect; c. Internal short circuit.

7. Battery short circuit

A. Cool; b. Shell fashion; c. Vegetable scraping (diaphragm is too small or unpleassed); d. Wound is not uniform; e. No package is good; f. The diaphragm has holes; g. Burr

8. Battery is broken.

A) Extreme ear and rivets are not welded, or the effective solder joint area is small;

B) The connecting piece is broken (which is too welded when the connecting piece is solder or solder is soldered) 

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