Temperature compensated current measuring device and battery pack using the same
First Claim
1. A battery pack comprising:
- a rechargeable battery;
a charging/discharging switching element electrically connected to a high-current path of the rechargeable battery;
a conductor electrically connected to the high-current path in which a current for charging/discharging of the rechargeable battery flows;
a temperature sensor disposed around the conductor to measure a temperature of the conductor; and
a charging/discharging control circuit electrically connected to the rechargeable battery to measure a voltage of the rechargeable battery, electrically connected to two positions of the conductor to measure a voltage between two positions of the conductor, and electrically connected to the temperature sensor to measure the temperature of the conductor;
wherein the charging/discharging control circuit is programmed to calculate a charging/discharging current flowing in the conductor by using a previously memorized lookup table for temperature resistance, the measured voltage between the two positions of the conductor, and the temperature measured from the conductor as input signals; and
to adjust the charging/discharging current flowing in the charging/discharging switching element according to the previously memorized lookup table for temperature-resistance, the measured voltage between the two positions of the conductor, the voltage of the rechargeable battery and the temperature measured from the conductor.
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Accused Products
Abstract
A battery pack, and more particularly, a temperature compensated current measuring device which can accurately measure an actual current flowing in a circuit of a charging/discharging path in the battery pack. The temperature compensated current measuring device includes a conductor in which current flows, a temperature sensor disposed around the conductor to measure a temperature of the conductor, and a temperature compensated current detection circuit part electrically connected to two positions of the conductor to measure a voltage between the two positions, electrically connected to the temperature sensor to measure a temperature of the conductor, and measuring the current flowing in the conductor by using the measured temperature and the voltage as an input signal. Thus, it is possible to accurately calculate an actual charging/discharging current with the temperature compensated current measuring device and effectively control the charging capacity of the battery pack.
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Citations
11 Claims
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1. A battery pack comprising:
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a rechargeable battery; a charging/discharging switching element electrically connected to a high-current path of the rechargeable battery; a conductor electrically connected to the high-current path in which a current for charging/discharging of the rechargeable battery flows; a temperature sensor disposed around the conductor to measure a temperature of the conductor; and a charging/discharging control circuit electrically connected to the rechargeable battery to measure a voltage of the rechargeable battery, electrically connected to two positions of the conductor to measure a voltage between two positions of the conductor, and electrically connected to the temperature sensor to measure the temperature of the conductor; wherein the charging/discharging control circuit is programmed to calculate a charging/discharging current flowing in the conductor by using a previously memorized lookup table for temperature resistance, the measured voltage between the two positions of the conductor, and the temperature measured from the conductor as input signals; and
to adjust the charging/discharging current flowing in the charging/discharging switching element according to the previously memorized lookup table for temperature-resistance, the measured voltage between the two positions of the conductor, the voltage of the rechargeable battery and the temperature measured from the conductor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification