Self-discharging screening method of lithium ion battery
A lithium-ion battery and screening method technology, which is applied in the field of self-discharge screening of lithium-ion batteries, can solve problems such as high misjudgment rate and complexity, and achieve the effects of improving product quality, improving screening accuracy, and reducing shipping risks
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[0018] The following describes the invention in detail with reference to the drawings and embodiments:
[0019] The present invention designs a lithium-ion battery self-discharge screening method. The method firstly places the battery fully charged or half-charged and then determines the open circuit voltage and then screens and then uses the "3σ" cycle method to remove the corresponding self-discharged battery so as to realize the self-discharge of the lithium ion battery. Discharge screening.
[0020] As an embodiment of the present invention, the present invention provides a lithium ion battery self-discharge screening method, which is characterized in that it includes the following two steps:
[0021] Step 1: Pre-charge the battery to be screened to full or half-charged, perform high-temperature aging treatment, and store at room temperature. The detected open-circuit voltage is recorded as OCV1 and then stored at room temperature. The detected open-circuit voltage is recorded as...
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