Reserve activated electrochemical cell with a cell condition che

Details Reserve activated electrochemical cell with a cell condition che Reserve activated electrochemical cell with a cell condition che

1989-07-31

1990-08-14

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

With measuring, testing, or indicating means

429116, H01M 636

Patent

active

049486837

ABSTRACT:
A reserve activated electrochemical cell with a cell condition checking apparatus uses a sealed electrochemical fluid, e.g., an electrolyte, storing reservoir having an expandable pressurized capsule within the reservoir for pressurizing the fluid. The reservoir is provided with a rupturable diaphragm arranged as a fluid-tight seal across an opening in a wall of the reservoir. A selectively operable lance is arranged with a pointed end adjacent to the diaphragm for activating the cell by piercing the diaphragm to release the fluid into the electrode assembly. A reservoir leak indicator is located in the reservoir to provide an indication of a leakage path between the pressurized capsule and the fluid stored in the reservoir allowing a migration of the fluid into the capsule. In a first embodiment of the reservoir leak detector, a visual indication of fluid leakage is provided through a transparent window in a wall of the reservoir by a visual change in a fluid reactive substance located in the capsule. In a second embodiment, a conductive path is established by a fluid leakage between two spaced-apart non-reactive electrodes located within the reservoir and connected by respective conductive wires to respective locations external of the reservoir. In a third embodiment, the fluid leak detection is provided by an output signal representative of an electrochemical reaction between two spaced-apart reactive electrodes located within the pressurized capsule and connected by respective conductive wire to respective locations external of the reservoir.

REFERENCES:
patent: 3514338 (1970-05-01), Eekma
patent: 3563806 (1971-02-01), Hruden
patent: 3656340 (1972-04-01), Ball
patent: 4695520 (1987-09-01), Koper et al.
patent: 4861686 (1989-08-01), Snyder

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