Housing for battery cell with protection for pressure and temper

Details Housing for battery cell with protection for pressure and temper Housing for battery cell with protection for pressure and temper

1974-09-09

1976-01-20

Walton, Donald L.

Batteries: thermoelectric and photoelectric

Thermoelectric

Radiation pyrometer

136181, H01M 650

Patent

active

039335267

ABSTRACT:
A housing for a battery cell includes a built-in switch for opening the circuit to the battery in response to excess pressure and/or temperature. The housing has a first conducting contact connected to the first battery electrode, and a second contact connected to the second electrode and connected through a wall of the housing to provide a circuit to the battery cell. The second contact may be a porous wall to allow gasses which form in the battery cell to pass to the outer housing wall, and when the pressure exceeds a predetermined value the outer wall will flex and open the electrical connection to the battery. The outer wall can be a bimetallic disc which flexes with rise in temperature of the battery cell to open the connection when the temperature exceeds a predetermined value. The pressure responsive action can be provided alone, the temperature responsive action can be provided alone, or the two features can be used in combination to provide a housing wherein the connection to the battery is opened in response to excessive pressure or temperature, or a combination of the two conditions.

REFERENCES:
patent: 2269040 (1942-01-01), Rublee
patent: 2289128 (1942-07-01), Kopf
patent: 2651669 (1953-09-01), Neumann
patent: 3373057 (1968-03-01), Jost et al.
patent: 3617386 (1971-11-01), Bosben et al.
patent: 3622397 (1971-11-01), Belove

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