BATTERY STATUS DETECTION DEVICE
First Claim
1. A device detecting a status of a secondary battery supplying power to an electric load, the device comprising:
- a voltage detection unit detecting voltages of the secondary battery;
a current detection unit detecting charge/discharge currents of the secondary battery;
an internal resistance calculation unit calculating an internal resistance value of the secondary battery based on a voltage difference between the voltages detected by the voltage detection unit before and after a start of charging the secondary battery and a current difference between the charge/discharge currents detected by the current detection unit before and after the start of charging the secondary battery;
a degradation determining unit determining whether the secondary battery is degraded by comparing the internal resistance value calculated by the internal resistance calculation unit with a degradation determining threshold of the secondary battery; and
an output unit outputting a signal indicating the determination result of the degradation determining unit.
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Accused Products
Abstract
A battery status detection device for detecting the status of a secondary battery 200 supplying power to a mobile device 300 includes a voltage detection unit 20 detecting voltages of the secondary battery 200; a current detection unit 30 detecting charge/discharge currents of the secondary battery 200; an arithmetic processing unit 50 calculating an internal resistance value of the secondary battery 200 based on a voltage difference between the voltages detected by the voltage detection unit 20 before and after the start of charging the secondary battery 200 and a current difference between the charge/discharge currents detected by the current detection unit 30 before and after the start of charging the secondary battery 200 and determining whether the secondary battery 200 is degraded based on the calculated internal resistance value; and a communication processing unit 70 outputting a signal indicating the determination result of the arithmetic processing unit 50.
46 Citations
9 Claims
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1. A device detecting a status of a secondary battery supplying power to an electric load, the device comprising:
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a voltage detection unit detecting voltages of the secondary battery; a current detection unit detecting charge/discharge currents of the secondary battery; an internal resistance calculation unit calculating an internal resistance value of the secondary battery based on a voltage difference between the voltages detected by the voltage detection unit before and after a start of charging the secondary battery and a current difference between the charge/discharge currents detected by the current detection unit before and after the start of charging the secondary battery; a degradation determining unit determining whether the secondary battery is degraded by comparing the internal resistance value calculated by the internal resistance calculation unit with a degradation determining threshold of the secondary battery; and an output unit outputting a signal indicating the determination result of the degradation determining unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device detecting a status of a secondary battery supplying power to an electric load, the device comprising:
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a voltage detection unit detecting voltages of the secondary battery; a current detection unit detecting charge/discharge currents of the secondary battery; an internal resistance calculation unit calculating an internal resistance value of the secondary battery based on a voltage difference between the voltages detected by the voltage detection unit before and after a start of discharging of the secondary battery and a current difference between the charge/discharge currents detected by the current detection unit before and after the start of discharging of the secondary battery; a degradation determining unit determining whether the secondary battery is degraded by comparing the internal resistance value calculated by the internal resistance calculation unit with a degradation determining threshold of the secondary battery; and an output unit outputting a signal indicating the determination result of the degradation determining unit. - View Dependent Claims (9)
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Specification