Toyota Jidosha Kabushiki Kaisha

Takashi Takimoto

Tomohiro Matsuura

Mizuho Matsumoto

Yuta Nemoto

Satomi Yamamoto

Tomohiro Ono

A secondary battery according to the present disclosure includes a battery case, an electrode member contained in the battery case, and a lid configured to hermetically seal the battery case. A current-carrying part, which electrically connects a collector terminal of the electrode member with an external electrode terminal, includes a displacement part configured to be displaced outward in response to a rise in an internal pressure of the battery case, the displacement part being connected to at least a part of the collector terminal. When the displacement part is displaced outward in response to the rise in the internal pressure of the battery case, the connection between the displacement part and the collector terminal is disconnected and the current-carrying part is electrically cut off from the collector terminal. In the secondary battery according to the present disclosure, the current-carrying part including the displacement part is disposed in the lid.

Secondary battery

A battery pack is a battery pack that is configured by arranging plural chargeable-dischargeable single cells in a specified direction. Each of the plural single cells includes: an electrode body including a positive electrode and a negative electrode; and a box-shaped battery case accommodating the electrode body and an electrolyte. The two adjacent single cells in the battery pack are provided with gas discharge valves in mutually opposing surfaces of the battery cases, each of the gas discharge valves discharging gas that is produced in the battery case. In the battery cases provided in the two adjacent single cells, the gas discharge valves that are provided in the mutually opposing surfaces are disposed at positions that do not overlap each other when seen in an arrangement direction of the single cells.

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Toyota, Japan

Takashi Takimoto