Battery protection circuit for multiple battery power supply and charging system
First Claim
1. A protection circuit for controlling the charge and discharge of an auxiliary battery of a multi-battery power supply and charging system, the multi-battery power supply and charging system including a chassis storage battery for supplying electrical power to chassis loads, the auxiliary storage battery for supplying electrical power to auxiliary loads, and an electrical power generator for charging the batteries and supplying electrical power to the loads, the electrical power generator, the batteries and the loads each having an ungrounded terminal and each having a grounded terminal connected to a common ground, the ungrounded electrical power generator terminal being connected to the ungrounded chassis battery terminal, the protection circuit comprising:
- (a) circuit node connection terminals including an electrical power generator node for connection to the ungrounded terminal of the electrical power generator, an auxiliary battery node for connection to the ungrounded terminal of the auxiliary storage battery, an auxiliary load node for connection to the ungrounded terminal of the auxiliary load and a ground node for connection to the common ground;
(b) a switching control circuit including a digital processor, the control circuit having a voltage sensing circuit connected to the power generator node, a voltage sensing circuit connected to the auxiliary battery node, a ground terminal for connection to the common ground and outputs for controlling switches;
(c) an electrically controlled first switch connected between the power generator node and the auxiliary load node, the first switch having a control input terminal connected to an output of the control circuit for being switched between a closed state and an open state by the control circuit;
(d) an electrically controlled second switch connected between the auxiliary load node and the auxiliary battery node, the second switch having a control input terminal connected to an output of the control circuit for being switched between a closed state and an open state by the control circuit.
1 Assignment
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Accused Products
Abstract
A battery protection circuit for connection to a vehicle'"'"'s auxiliary battery, auxiliary battery load and chassis battery that is connected to the vehicle'"'"'s alternator. A switching control circuit, including a digital processor, has a voltage sensing circuit connected to the alternator, a voltage sensing circuit connected to the auxiliary battery, a ground terminal for connection to the vehicle'"'"'s common ground and outputs for controlling switches. An electrically controlled first switch is interconnected between the alternator and the auxiliary load. The first switch has a control input terminal connected to an output of the control circuit for being switched between a closed state and an open state. An electrically controlled second switch is interconnected between the auxiliary load and the auxiliary battery. The second switch has a control input terminal connected to an output of the control circuit for being switched between a closed state and an open state.
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Citations
20 Claims
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1. A protection circuit for controlling the charge and discharge of an auxiliary battery of a multi-battery power supply and charging system, the multi-battery power supply and charging system including a chassis storage battery for supplying electrical power to chassis loads, the auxiliary storage battery for supplying electrical power to auxiliary loads, and an electrical power generator for charging the batteries and supplying electrical power to the loads, the electrical power generator, the batteries and the loads each having an ungrounded terminal and each having a grounded terminal connected to a common ground, the ungrounded electrical power generator terminal being connected to the ungrounded chassis battery terminal, the protection circuit comprising:
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(a) circuit node connection terminals including an electrical power generator node for connection to the ungrounded terminal of the electrical power generator, an auxiliary battery node for connection to the ungrounded terminal of the auxiliary storage battery, an auxiliary load node for connection to the ungrounded terminal of the auxiliary load and a ground node for connection to the common ground; (b) a switching control circuit including a digital processor, the control circuit having a voltage sensing circuit connected to the power generator node, a voltage sensing circuit connected to the auxiliary battery node, a ground terminal for connection to the common ground and outputs for controlling switches; (c) an electrically controlled first switch connected between the power generator node and the auxiliary load node, the first switch having a control input terminal connected to an output of the control circuit for being switched between a closed state and an open state by the control circuit; (d) an electrically controlled second switch connected between the auxiliary load node and the auxiliary battery node, the second switch having a control input terminal connected to an output of the control circuit for being switched between a closed state and an open state by the control circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification