Method for reusing decommissioned lithium ion power battery
A power battery and lithium-ion technology, which is applied in the field of reuse of retired lithium-ion power batteries, can solve the problems of differences in polarization degree, difficulty in selecting self-discharge batteries, large polarization differences, etc., and achieve the effect of improving consistency.
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[0019] Such as figure 1 As shown, take the reuse of 10 sets of decommissioned battery packs after use as an example. The specific steps are as follows: (1) Disassemble 10 sets of 168 parallel electric bus decommissioned battery packs into standard modules, a total of 1680 sets of standard modules; (2) Check the appearance, voltage, internal resistance, and capacity of the standard modules, and eliminate unqualified modules. A total of 10 groups of unqualified modules were eliminated; (3) Charge the qualified modules to 100% SOC, and after standing for 12 hours at room temperature, test the module polarization voltage U1; (4) Divide the modules into 5 gears according to U1, U1-1, U1-2, ... U1-5, U1-1: ≥3.35V, 167 pieces, U1-2: >3.338, ≤3.35V, 418 pieces, U1-3: >3.330, ≤3.338, 751 pcs, U1-4: >3.325, ≤3.330, 251 pcs, U1-5: <3.325V, 83 pcs; (5) After the module continues to stand at room temperature for 10 days, test the module voltage U2, and eliminate the module with large self...
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