Manufacturing method for non-aqueous secondary batteries

Abstract

This invention provides a method for manufacturing a non-aqueous secondary battery in which the reaction resistance of the electrode body can be adjusted. [Solution] A method for manufacturing a non-aqueous secondary battery includes: a reaction resistance calculation step for calculating the reaction resistance of an electrode body; a reaction resistance determination step for determining whether the reaction resistance calculated in the reaction resistance calculation step is included in a specified reaction resistance; if the reaction resistance calculated in the reaction resistance determination step is not included in the specified reaction resistance, a dissolution amount calculation step for calculating the dissolution amount corresponding to the specified reaction resistance; and an aging condition determination step for determining aging conditions based on a known correspondence between the dissolution amount and the aging conditions for aging. Aging is performed based on the aging conditions determined in the aging condition determination step, and if the reaction resistance is included in the specified reaction resistance, aging is performed based on the specified aging conditions.

Claims

1. A method for manufacturing a non-aqueous secondary battery comprising an electrode body and a non-aqueous electrolyte injected into a battery case housing the electrode body, A reaction resistance calculation step for calculating the reaction resistance of the electrode body, A reaction resistance determination step that determines whether the reaction resistance calculated in the reaction resistance calculation step is included in the specified reaction resistance, If the reaction resistance calculated in the reaction resistance determination step does not fall within the specified reaction resistance, the elution amount calculation step calculates the elution amount corresponding to the specified reaction resistance based on a known correspondence between the amount of binder eluted by the negative electrode active material contained in the electrode body due to aging and the reaction resistance, The process includes: an aging condition determination step, in which the aging conditions are determined based on a known correspondence between the amount of elution and the aging conditions; The aging process is performed based on the aging conditions determined in the aging condition determination step, and if the reaction resistance is included in the specified reaction resistance, the aging process is performed based on the specified aging conditions. A method for manufacturing a non-aqueous secondary battery.

2. In the aging condition determination step, the specified aging conditions are increased or decreased so that the amount of elution calculated in the elution amount calculation step is obtained. A method for manufacturing a non-aqueous secondary battery according to claim 1.

3. The aging conditions are at least one of time and temperature. A method for manufacturing a non-aqueous secondary battery according to claim 1 or 2.

4. In the reaction resistance calculation step, the reaction resistance is calculated using the specific surface area of ​​the negative electrode active material contained in the electrode body, based on the known correspondence between the specific surface area of ​​the negative electrode active material contained in the electrode body and the reaction resistance. A method for manufacturing a non-aqueous secondary battery according to claim 1.

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