Title: Housing for battery cell with protection for pressure and temperature

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.

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Other info:

Inventors: Rackin, Mark H. (Sunrise, FL, US)

Application Number: 504210
Filing Date: 1974-09-09
Publication_date: 1976-01-20
Assignee: Motorola, Inc. (Chicago, IL)
Primary Class(es): 429/97
Other Classes:
US Patent Ref:

2269040	Jan, 1942	Rublee	136/179.
2289128	Jul, 1942	Kopf	136/182.
2651669	Sep, 1953	Neumann	136/179.
3373057	Mar, 1968	Jost et al.	136/179.
3617386	Nov, 1971	Bosben et al.	136/178.
3622397	Nov, 1971	Belove	136/181.

Other Refs:
Primary Examiner: Walton, Donald L.
Assistant Examiner:
Attorney: Southard; Donald B., Gillman; James W.