发明申请
US20140322579A1 METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY (AS AMENDED) 有权
生产非水电解质二次电池的方法(已修订)

METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY (AS AMENDED)
摘要:
The present invention provides a method for producing a nonaqueous electrolyte secondary battery in which the drop in capacity retention rate is controlled by forming a coating in a more favorable state on the surface of the negative electrode active material. This production method comprises a step S10 of preparing a battery assembly in which an electrode assembly is housed within a battery case, the electrode assembly including a positive electrode produced by forming a positive electrode active material layer containing at least a positive electrode active material, and a negative electrode produced by forming a negative electrode active material layer containing at least a negative electrode active material; a first injection step S20 of injecting a nonaqueous electrolyte containing a specified additive into the battery case; a precharging step S30 of forming the additive-derived coating on the surface of the negative electrode active material; a second injection step S40 of injecting a nonaqueous electrolyte not containing an additive into the battery case; and a charge and discharge step S50 of charging and discharging the battery assembly to a predetermined charging and discharge voltage.
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