Battery protection device
First Claim
1. A device for protecting a battery which provides starting power to a motor and auxiliary power to a load normally powered by a generator driven by said motor, comprising mechanical switch means for connection intermediate said battery and load;
- first circuit means for detecting current flowing from said battery to said load and integrating a signal representative of said detected current;
second circuit means for producing a control output signal when the product of said integration reaches a predetermined level; and
electrical switch means operatively coupled to said mechanical switch means and to said second circuit means for opening said mechanical switch means in response to said control output signal, said first circuit means being adapted for operative coupling to said generator for disabling the production of said control output signal when said generator is operative.
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Abstract
A device for providing protection to a battery utilized as an auxiliary and starting power source for a motor-generator. The device includes a switch positioned intermediate the battery and the load and circuit means for integrating current flow from said battery when said generator is inoperative and automatically opening the switch when the product of said integration reaches a predetermined threshold level. The device is particularly adapted for a vehicular battery and uses a length of the battery cable for detecting current flow.
36 Citations
20 Claims
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1. A device for protecting a battery which provides starting power to a motor and auxiliary power to a load normally powered by a generator driven by said motor, comprising mechanical switch means for connection intermediate said battery and load;
- first circuit means for detecting current flowing from said battery to said load and integrating a signal representative of said detected current;
second circuit means for producing a control output signal when the product of said integration reaches a predetermined level; and
electrical switch means operatively coupled to said mechanical switch means and to said second circuit means for opening said mechanical switch means in response to said control output signal, said first circuit means being adapted for operative coupling to said generator for disabling the production of said control output signal when said generator is operative. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- first circuit means for detecting current flowing from said battery to said load and integrating a signal representative of said detected current;
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18. A device for protecting a battery which provides starting power to a motor and auxiliary power to a load normally powered by a generator driven by said motor, comprising mechanical switch means connected intermediate said battery and load, circuit means for detecting current flow through said mechanical switch means from said battery to said load and for producing a control output signal in response to a predetermined drain from said battery, means for detecting the operation of said generator for rendering said circuit means inoperative during operation of said generator;
- and electircal switch means operatively coupled to said mechanical switch means and to said circuit means for opening said mechanical switch means in response to said output control signal, said mechanical switch means including a pair of fixed contact means, a displaceable contact means displaceable between a first position in electrical contact with said fixed contact means and a second position out of electrical contact therewith, means for biasing said displaceable contact means into its first position, index means for holding said displaceable contact means in its first position against the force of said bias means, and means operatively coupling said electrical switch means and index means for the selective release of said index means to effect opening of said switch means.
- View Dependent Claims (19, 20)
Specification