Method for screening abnormal lithium ion batteries
A lithium-ion battery and lithium-ion technology, applied in sorting and other directions, can solve the problem of hidden self-discharge leakage and abnormal cells that are difficult to screen out, and achieve the effect of increasing the friction of the pole piece
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Embodiment 1
[0026] Embodiment 1 (23Ah square battery)
[0027] A method for screening abnormal lithium-ion batteries, the steps are as follows:
[0028] a. Blow dry the surface moisture of the battery after formation and cleaning, clamp it with a clamp, the clamp pressure is 23Kgf, transport it to the power supply cabinet, and fill the battery with a current of 0.2C;
[0029] b. Send the above-mentioned fully charged battery to the vibration table in the room with explosion-proof, exhaust and heating devices, set the vibration parameters of the battery pack according to the national standard GBT-31467, and the vibration time is 1h;
[0030] c. Ship out the batteries after the above-mentioned vibration after standing still for 8 hours, remove the batteries with obvious abnormal appearance (flatulence, liquid leakage, ablation, etc.), and put the remaining batteries into the capacity separation cabinet for capacity separation treatment, and calculate the battery The n value of the capacity...
Embodiment 2
[0033] Embodiment 2 (105Ah square battery)
[0034] a. Blow dry the surface moisture of the battery after formation and cleaning, clamp it with a clamp, the clamp pressure is 105Kgf, transport it to the power supply cabinet, and fill the battery with a current of 0.2C;
[0035] b. Send the above-mentioned fully charged battery to the vibration table in the room with explosion-proof, exhaust and heating devices, set the vibration parameters of the battery pack according to the national standard GBT-31467, and the vibration time is 2h;
[0036] c. Ship out the batteries after the above-mentioned vibrating batteries have been left to stand for 12 hours, remove the batteries with obvious abnormal appearance (flatulence, liquid leakage, ablation, etc.), and put the remaining batteries into the capacity separation cabinet for capacity separation treatment, and calculate the battery capacity The n value of the capacity retention rate, excluding flatulence, liquid leakage, ablation or...
Embodiment 3
[0039] Embodiment 3 (15Ah cylindrical battery)
[0040] a. Blow dry the surface moisture of the battery after formation and cleaning, clamp it with a clamp, the clamp pressure is 15Kgf, transport it to the power supply cabinet, and fill the battery with a current of 0.1C;
[0041] b. Send the above-mentioned fully charged battery to the vibration table in the room with explosion-proof, exhaust and heating devices, set the vibration parameters of the battery pack according to the national standard GBT-31467, and the vibration time is 0.5h;
[0042]c. Ship out the batteries after the above-mentioned vibrations have been left to stand for 16 hours, and remove the batteries with obvious abnormal appearance (flatulence, liquid leakage, ablation, etc.), and the remaining batteries are put into the capacity separation cabinet for capacity separation treatment, and the battery is calculated The n value of the capacity retention rate, excluding flatulence, liquid leakage, ablation or n...
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