Thermally-activated switch for short-circuiting a battery cell
First Claim
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1. A thermally activated short-circuiting switch designed to be connected in parallel with a battery cell comprising;
- first and second contact elements, thermally activatable means for causing the first and second contact elements to be short-circuited, the switch having a first state in which it is not activated and a second state in which it is activated and forms a short circuit between the first and second contact elements, the first and second contact elements have first and second regions which face each other, and said thermally activatable means being mechanically linked at least to said first contact element in said first state of the switch;
said first contact element including a housing and a mass of metal disposed therein constituting said thermally activatable means, said first and second regions of the first and second contact elements are spaced apart such that dome of liquid which tends to form upon melting of the mass of metal produces a short-circuit between said first and second regions.
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Abstract
A thermally activated short-circuit switch for connection in parallel with a battery cell has first and second contact elements (6; 3) which are distinct from the electrodes of a diode, and thermally activatable means (45) for short-circuiting the first and second contact elements (6; 3). The first and second contact elements have respective first and second regions (6; 3) facing each other, and said thermally activatable means (45) is mechanically linked to the first contact element (6).
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6 Claims
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1. A thermally activated short-circuiting switch designed to be connected in parallel with a battery cell comprising;
- first and second contact elements, thermally activatable means for causing the first and second contact elements to be short-circuited, the switch having a first state in which it is not activated and a second state in which it is activated and forms a short circuit between the first and second contact elements, the first and second contact elements have first and second regions which face each other, and said thermally activatable means being mechanically linked at least to said first contact element in said first state of the switch;
said first contact element including a housing and a mass of metal disposed therein constituting said thermally activatable means, said first and second regions of the first and second contact elements are spaced apart such that dome of liquid which tends to form upon melting of the mass of metal produces a short-circuit between said first and second regions. - View Dependent Claims (2, 3, 4, 5, 6)
- first and second contact elements, thermally activatable means for causing the first and second contact elements to be short-circuited, the switch having a first state in which it is not activated and a second state in which it is activated and forms a short circuit between the first and second contact elements, the first and second contact elements have first and second regions which face each other, and said thermally activatable means being mechanically linked at least to said first contact element in said first state of the switch;
Specification