Voltage detector for an assembled battery
First Claim
1. A total voltage detector for an assembled battery in which multiple electric cells are electrically connected in series, the detector comprising:
- cell voltage sensors that detect voltages of the multiple cells;
a total voltage sensor that detects a first total voltage of the assembled battery by detecting the voltage between positive and negative terminals of the assembled battery; and
a controller receiving input from the cell voltage sensors and the total voltage sensor, the controller including;
a total voltage computation part operable to compute a second total voltage of the assembled battery by adding together the voltages of the multiple cells;
a correlation determination part operable to obtain a correlation between the second total voltage and the first total voltage; and
a total voltage correction part operable to correct the first total voltage based on the correlation.
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Accused Products
Abstract
An apparatus and method for detecting total voltage of an assembled battery including a number of serially-connected electric cells. Voltages of the respective cells are detected and added up, correlation between the resulting total voltage and a total voltage obtained by detecting the voltage of the assembled battery directly from its terminals is obtained, and a corrective arithmetic operation is carried out inside the device to correct the total voltage obtained through direct detection. The total voltage is detected with a high degree of accuracy without the need for individual adjustment operations using a variable resistance, high-accuracy external tester.
10 Citations
20 Claims
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1. A total voltage detector for an assembled battery in which multiple electric cells are electrically connected in series, the detector comprising:
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cell voltage sensors that detect voltages of the multiple cells; a total voltage sensor that detects a first total voltage of the assembled battery by detecting the voltage between positive and negative terminals of the assembled battery; and a controller receiving input from the cell voltage sensors and the total voltage sensor, the controller including; a total voltage computation part operable to compute a second total voltage of the assembled battery by adding together the voltages of the multiple cells; a correlation determination part operable to obtain a correlation between the second total voltage and the first total voltage; and a total voltage correction part operable to correct the first total voltage based on the correlation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A total voltage detector for an assembled battery in which multiple electric cells are arranged in series electrically, the detector comprising:
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means for detecting voltages of the multiple cells; means for detecting a first total voltage of the assembled battery by detecting a voltage between positive and negative terminals of the assembled battery; means for computing a sum of the voltages of the multiple cells; means for determining a correlation between the sum and the first total voltage; and means for correcting the first total voltage based on the correlation. - View Dependent Claims (10)
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11. A method of detecting a total voltage of an assembled battery in which multiple electric cells are electrically connected in series, the assembled battery having positive and negative terminals, the method comprising:
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detecting voltages of the multiple cells; detecting a first total voltage of the assembled battery by detecting the voltage between the positive and negative terminals of the assembled battery; adding together the voltages of the multiple cells to obtain a second total voltage of the assembled battery; obtaining a correlation between the second total voltage and the first total voltage; and selectively correcting the first total voltage based on the correlation. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification