Voltage measurement for multiple cell battery pack
First Claim
1. A method for detecting a voltage of a rechargeable battery set in an apparatus, the apparatus including a square wave generator, a first circuit that has a resistor, a capacitor and the rechargeable battery set, and a second circuit that has a resistor and a capacitor matching the equivalent, components in the first circuit, the method comprising the steps of:
- generating a wave form with a positive phase and a negative phase by the square wave generator;
sending the wave form to the first circuit, wherein the positive phase of the wave form flows a first loop from the resistor to the capacitor and to the positive side of the rechargeable battery set, and the negative phase of the wave form flows a second loop from the negative side of the battery set toward the capacitor and then the resistor;
sending the wave form to the second circuit;
driving a matching voltage in the second circuit to become equivalent to the voltage of the rechargeable battery set; and
measuring the matching voltage as the battery voltage.
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Abstract
A method and apparatus to detect cell voltage of each of a plurality of battery cells in a rechargeable battery pack is disclosed. The method comprises generating a square wave form with a positive phase and a negative phase, sending the square wave form to a first circuit that is connected to a battery cell and to a second circuit with matching components of the first circuit, and finally driving a matching voltage of the second circuit to become equivalent to the battery cell voltage for measurement.
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Citations
8 Claims
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1. A method for detecting a voltage of a rechargeable battery set in an apparatus, the apparatus including a square wave generator, a first circuit that has a resistor, a capacitor and the rechargeable battery set, and a second circuit that has a resistor and a capacitor matching the equivalent, components in the first circuit, the method comprising the steps of:
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generating a wave form with a positive phase and a negative phase by the square wave generator; sending the wave form to the first circuit, wherein the positive phase of the wave form flows a first loop from the resistor to the capacitor and to the positive side of the rechargeable battery set, and the negative phase of the wave form flows a second loop from the negative side of the battery set toward the capacitor and then the resistor; sending the wave form to the second circuit; driving a matching voltage in the second circuit to become equivalent to the voltage of the rechargeable battery set; and measuring the matching voltage as the battery voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification