SECONDARY BATTERY PROTECTION CIRCUIT AND BATTERY DEVICE
First Claim
1. A secondary battery protection circuit comprising:
- an overcharge detection device having an overcharge detection circuit and configured to detect overcharging of a secondary battery; and
a charge breaking element configured to interrupt charging to the secondary battery when the overcharging is detected,the overcharge detection device having a second detection circuit,the second detection circuit having a detection voltage threshold being identical to a detection voltage threshold of the overcharge detection circuit or in the vicinity of not greater than the detection voltage threshold of the overcharge detection circuit, andthe secondary battery protection circuit being configured to reduce current consumption of the overcharge detection device when a voltage of the secondary battery is less than the detection voltage threshold of the second detection circuit.
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Accused Products
Abstract
To realize an overcharge detection device capable of bring about a state of reducing current consumption thereof except for when a lithium ion secondary battery becomes overcharged, and provide a secondary battery protection circuit and a battery device low in power consumption and safe. There is provided a secondary battery protection circuit which is provided with a second detection circuit having a detection voltage threshold identical to or lower than a detection voltage threshold of an overcharge detection circuit and reduces current consumption of the overcharge detection device when the voltage of the secondary battery is less than the detection voltage threshold of the second detection circuit.
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Citations
4 Claims
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1. A secondary battery protection circuit comprising:
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an overcharge detection device having an overcharge detection circuit and configured to detect overcharging of a secondary battery; and a charge breaking element configured to interrupt charging to the secondary battery when the overcharging is detected, the overcharge detection device having a second detection circuit, the second detection circuit having a detection voltage threshold being identical to a detection voltage threshold of the overcharge detection circuit or in the vicinity of not greater than the detection voltage threshold of the overcharge detection circuit, and the secondary battery protection circuit being configured to reduce current consumption of the overcharge detection device when a voltage of the secondary battery is less than the detection voltage threshold of the second detection circuit. - View Dependent Claims (2, 3, 4)
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Specification