Secondary battery, battery pack, and vehicle
AssigneeKabushiki Kaisha Toshiba
InventorsKazuki Ise, Shinsuke Matsuno, Norio Takami, Hiroki Inagaki
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Abstract
According to one embodiment, a secondary battery is provided. The secondary battery includes a negative electrode including a negative electrode current collector, a negative electrode terminal electrically connected to the negative electrode current collector, a joint electrically connecting the negative electrode terminal and the negative electrode current collector, and a water repellent layer covering the joint. The joint is covered with the inner surface of the water repellent layer. A contact angle θ with respect to water on an outer surface of the water repellent layer satisfies 80°≤θ.
Claims14
A secondary battery comprising:
- a negative electrode comprising a negative electrode current collector;
- a negative electrode terminal electrically connected to the negative electrode current collector;
- a joint electrically connecting the negative electrode terminal and the negative electrode current collector;
- a water repellent layer covering the joint;
- a positive electrode;
- and
- an aqueous electrolyte containing at least one of lithium salt and sodium salt,
- wherein each of the negative electrode terminal and the negative electrode current collector comprises zinc or an alloy containing zinc, or the negative electrode comprises a coating layer containing boehmite in at least a part of a surface of each of the negative electrode terminal and the negative electrode current collector, and
- the joint is covered with an inner surface of the water repellent layer, and a contact angle θ with respect to water on an outer surface of the water repellent layer satisfies 80°≤θ.
Dependencies are inferred from the claim text.