Secondary battery devices
First Claim
Patent Images
1. A secondary battery device comprising an accumulator, multiple protective circuits, and a first and a second output terminals, in which device:
- each of the protective circuits includes two fuses connected in series to form a series circuit, the series circuits of the two fuses are connected to each other in parallel, and when an external circuit is connected to the first and second output terminals, a discharging current supplied from the accumulator to the external circuit and a charging current supplied from the external circuit to the accumulator flow through the two fuses of each of the series circuits;
wherein each of the protective circuits includes a heater, and one end of each heater is connected to a junction between the two fuses, one end of a rectifier element is connected to the other end of each heater, the other end of each of the rectifier elements is connected to a switch element, and when the switch element is turned on, a current flows through the heater of each of the protective circuits via the switch element and each of the rectifier elements.
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Abstract
A secondary battery device 1 including multiple protective circuits U1-U3 connected in parallel and each having two fuses fa, fb connected in series, wherein a terminal tc of each heater h is connected to a switch element 4 via rectifier element D1-D3. Even if a potential difference is generated between terminals tc, no residual current flows because any one of the rectifier elements D1-D3 is reverse-biased.
18 Citations
12 Claims
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1. A secondary battery device comprising an accumulator, multiple protective circuits, and a first and a second output terminals, in which device:
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each of the protective circuits includes two fuses connected in series to form a series circuit, the series circuits of the two fuses are connected to each other in parallel, and when an external circuit is connected to the first and second output terminals, a discharging current supplied from the accumulator to the external circuit and a charging current supplied from the external circuit to the accumulator flow through the two fuses of each of the series circuits;
wherein each of the protective circuits includes a heater, and one end of each heater is connected to a junction between the two fuses, one end of a rectifier element is connected to the other end of each heater, the other end of each of the rectifier elements is connected to a switch element, and when the switch element is turned on, a current flows through the heater of each of the protective circuits via the switch element and each of the rectifier elements. - View Dependent Claims (4, 7, 10)
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2. A secondary battery device comprising an accumulator, multiple protective circuits, and a first and a second output terminals, in which device:
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each of the protective circuits includes two fuses connected in series to form a series circuit, the series circuits of the two fuses are connected to each other in parallel, and when an external circuit is connected to the first and second output terminals, a discharging current supplied from the accumulator to the external circuit and a charging current supplied from the external circuit to the accumulator flow through the two fuses of each of the series circuits;
wherein each of the protective circuits includes a heater, one end of each heater is connected to a junction between the two fuses, a switch element is connected to the other end of each heater, and when any one of the switch elements is turned on, a current flows through the heater of the protective circuit connected to the switch element via the switch element that is turned on. - View Dependent Claims (5, 8, 11)
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3. A secondary battery device comprising an accumulator, multiple protective circuits, and a first and a second output terminals, in which device:
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each of the protective circuits includes two fuses connected in series to form a series circuit, and a heater, one end of each heater is connected to a junction between the two fuses of the series circuit, the other end of each heater is connected to a switch element, when the switch element is turned on, a current flows through the heater in each of the protective circuits via the switch element that is turned on, and when an external circuit is connected to the first and second output terminals, a discharging current supplied from the accumulator to the external circuit and a charging current supplied from the external circuit to the accumulator flow through the two fuses of the series circuit in each of the multiple protective circuits;
wherein the junctions in the series circuits in the protective circuits are connected to each other. - View Dependent Claims (6, 9, 12)
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Specification