Secondary battery and method of manufacturing the same
AssigneePrime Planet Energy & Solutions, Inc.
InventorsYoshitaka Matsumasa, Tomokazu Yamanaka
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Abstract
Provided is a technique to reduce voids between an electrode tab and a current collecting unit in a portion where the electrode tab and the current collecting unit are welded. The secondary battery manufacturing method disclosed herein is a method of manufacturing a secondary battery including an electrode body having an electrode tab and a current collecting unit electrically connected to the electrode body. This method includes: welding between the electrode tab and the current collecting unit, by sandwiching the electrode tab between a transparent material and the current collecting unit and then applying laser to penetrate the transparent material.
Claims8
A method of manufacturing a secondary battery comprising
- an electrode body comprising multiple electrode tabs, and
- a current collecting unit electrically connected to the electrode body via the multiple electrode tabs, the method comprising:
- stacking the multiple electrode tabs,
- disposing the stacked multiple electrode tabs on the current collecting unit,
- after disposing the multiple electrode tabs on the current collecting unit, sandwiching the multiple electrode tabs between a transparent material and the current collecting unit, wherein the transparent material is disposed on a topmost surface of the multiple electrode tabs disposed on the current collecting unit,
- pressurizing the multiple electrode tabs against the current collecting unit with the transparent material, and
- while pressurizing the multiple electrode tabs against the current collecting unit, welding between the multiple electrode tabs and the current collecting unit, with the multiple electrode tabs sandwiched between the transparent material and the current collecting unit, by applying a laser to penetrate the transparent material.
Dependencies are inferred from the claim text.