Protective device for protecting individual battery cells in a b

Details Protective device for protecting individual battery cells in a b Protective device for protecting individual battery cells in a b

1995-11-20

1997-11-04

Nuzzolillo, M.

Chemistry: electrical current producing apparatus, product, and

Having polarity safety feature

429 7, 429 90, H01M 234

Patent

active

056838271

ABSTRACT:
A rechargeable battery pack which includes several battery cells. Each cell has a positive electrode and a negative electrode connected in series. Each of the battery cells further includes a reverse polarity protection device. The protection device includes a low voltage switch connected between the positive electrode and the negative electrode of the battery cell. The low voltage switch is switched on to become a short circuit when a voltage difference between the positive electrode and the negative electrode for each of the battery cells is lower than a threshold switch-on voltage such that the each of the battery cells is bypassed and protected by conducting a current through the short circuit in the low voltage switch.

REFERENCES:
patent: 4879188 (1989-11-01), Meinhold et al.
patent: 5389470 (1995-02-01), Parker et al.
patent: 5460901 (1995-10-01), Syrjala
patent: 5462814 (1995-10-01), Fernandez et al.
patent: 5496654 (1996-03-01), Perkins

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