Device for determining physical quantity of battery pack
First Claim
1. A device for determining a physical quantity of a battery pack as a combined body of a plurality of single secondary battery cells, comprising:
- a physical quantity detecting part for generating a signal of a level corresponding to a value of a physical quantity of the battery pack to be detected;
a temperature detecting part for generating a signal of a level corresponding to an ambient temperature in the device;
an A/D converter for converting analog signals from the physical quantity detecting part and the temperature detecting part into digital signals;
a storage part for storing in advance signal levels that are obtained from the physical quantity detecting part and the temperature detecting part via the A/D converter so as to correspond to a plurality of temperatures in a predetermined temperature range;
a signal processing part for correcting a signal level obtained from the physical quantity detecting part via the A/D converter, based on the signal levels corresponding to the plurality of temperatures that have been stored in the storage part; and
a voltage regulator for regulating a voltage level of an input power source to supply the temperature detecting part and the A/D converter with reference voltages as a reference voltage for detection and a reference voltage for conversion, respectively, and supply the storage part and the signal processing part with the reference voltage as a supply voltage.
1 Assignment
0 Petitions
Accused Products
Abstract
A device is provided that allows a physical quantity of a battery pack to be determined at low cost with high accuracy with respect to variations in environmental temperature. A voltage regulator supplies a temperature detecting part and an A/D converter with reference voltages as a reference voltage for detection and a reference voltage for conversion, respectively, and supplies a storage part and a signal processing part with the reference voltage as a supply voltage. Based on signal levels obtained from physical quantity detecting parts and the temperature detecting part via the A/D converter so as to correspond to a plurality of temperatures in a predetermined temperature range, which have been stored in the storage part, a signal level obtained from the physical quantity detecting part via the A/D converter is corrected in the signal processing part.
-
Citations
6 Claims
-
1. A device for determining a physical quantity of a battery pack as a combined body of a plurality of single secondary battery cells, comprising:
-
a physical quantity detecting part for generating a signal of a level corresponding to a value of a physical quantity of the battery pack to be detected;
a temperature detecting part for generating a signal of a level corresponding to an ambient temperature in the device;
an A/D converter for converting analog signals from the physical quantity detecting part and the temperature detecting part into digital signals;
a storage part for storing in advance signal levels that are obtained from the physical quantity detecting part and the temperature detecting part via the A/D converter so as to correspond to a plurality of temperatures in a predetermined temperature range;
a signal processing part for correcting a signal level obtained from the physical quantity detecting part via the A/D converter, based on the signal levels corresponding to the plurality of temperatures that have been stored in the storage part; and
a voltage regulator for regulating a voltage level of an input power source to supply the temperature detecting part and the A/D converter with reference voltages as a reference voltage for detection and a reference voltage for conversion, respectively, and supply the storage part and the signal processing part with the reference voltage as a supply voltage. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification