Method for manufacturing battery
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTakayuki Hayashi, Yoshihiro Bouki, Mitsugu Takaki
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Abstract
An alkaline secondary battery has a positive electrode plate having a predetermined shape, formed from a long-shaped electrode substrate. A manufacturing method thereof comprises an impurity detecting step for applying X-rays to the electrode substrate to acquire a transmitted image, and detecting based on the transmitted image whether a metal impurity particle made of a metal dissolved at a positive electrode potential and deposited at a negative electrode potential exists in the electrode substrate. The method includes a marking step for, when the metal impurity particle exists, applying a marking indicative of its particle-existing portion on the electrode substrate.
Claims14
A method for manufacturing a battery having a positive electrode plate having a predetermined shape, formed from an electrode substrate, comprising:
- an impurity detecting step for applying X-rays onto the electrode substrate or the positive electrode plate corresponding to an object to be examined to acquire a transmitted image, and detecting based on the transmitted image whether a metal impurity particle comprising a metal to be dissolved at a positive electrode potential and deposited at a negative electrode potential exists in the object.
A method for manufacturing an electrode substrate to be used as a positive electrode plate of a battery, comprising:
- an impurity detecting step for applying X-rays onto the electrode substrate to acquire a transmitted image and detecting based on the transmitted image whether a metal impurity particle comprised of a metal to be dissolved at a positive electrode potential and deposited at a negative electrode potential when the battery is constructed, exists in the electrode substrate.
Dependencies are inferred from the claim text.