Battery module
AssigneesPanasonic Energy Co., Ltd., Panasonic Holdings Corporation
InventorsYuji Kishida, Tatsuya Hirano, Kazutoshi Kohira
Life of this patent
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Abstract
A battery module includes a plurality of cylindrical batteries and lead plate connected to cylindrical batteries and electrically connecting the plurality of cylindrical batteries. Cylindrical battery includes can bottom valve including a thin-walled line ruptured and opening an exhaust port when an internal pressure of an outer covering can becomes higher than a threshold pressure. Lead plate includes double-supported arm arranged opposing a can bottom of cylindrical battery and coupled to lead plate at both ends at a position opposing can bottom valve, and gas permeation gap of exhaust gas ejected from the exhaust port on both sides of double-supported arm.
Claims15
A battery module comprising:
- a plurality of cylindrical batteries;
- and
- a lead plate connected to the plurality of cylindrical batteries and electrically connecting the plurality of cylindrical batteries to each other,
- wherein
- each of the plurality of cylindrical batteries includes a can bottom valve including a thin-walled line that is ruptured and opens an exhaust port when an internal pressure of an outer covering can becomes higher than a threshold pressure, and
- the lead plate includes
- a double-supported arm arranged opposing the can bottom valve at a can bottom of a corresponding one of the plurality of cylindrical batteries, wherein the double-supported arm is free of direct contact with the can bottom and coupled to a rest of the lead plate at both ends of the double-supported arm, and
- a gas permeation gap for exhaust gas ejected from the exhaust port disposed on both sides of the double-supported arm.
A battery module comprising:
- a plurality of cylindrical batteries;
- and
- a lead plate connected to the plurality of cylindrical batteries and electrically connecting the plurality of cylindrical batteries to each other,
- wherein
- each of the plurality of cylindrical batteries includes a can bottom valve including a thin-walled line that is ruptured and opens an exhaust port when an internal pressure of an outer covering can becomes higher than a threshold pressure,
- the lead plate includes
- a double-supported arm arranged opposing a can bottom of a corresponding one of the plurality of cylindrical batteries and coupled to the lead plate at both ends at a position opposing the can bottom valve, and
- a gas permeation gap for exhaust gas ejected from the exhaust port disposed on both sides of the double-supported arm,
- the lead plate includes connection arms provided by welding to the can bottom on both sides of the double-supported arm,
- the gas permeation gap is provided between the double-supported arm and each of the connection arms, and
- each of the connection arms is a cantilever arm with one end coupled to the lead plate, and includes a tip welded to the can bottom.
Dependencies are inferred from the claim text.