Battery voltage monitoring apparatus
First Claim
1. A battery voltage monitoring apparatus for monitoring an assembled battery voltage, the assembled battery including a plurality of battery cells, said battery voltage monitoring apparatus comprising:
- a plurality of input terminals, each input terminal connected to the plurality of battery cells respectively through a potential measurement line;
a voltage sensor connected to plurality of input terminals the voltage sensor detecting a potential of the plurality of battery cells;
an output logic circuit outputting a potential detect signal based on an output of the voltage sensor, the potential detect signal representing that an abnormal potential is detected; and
a current source,wherein the voltage sensor comprises;
a reference voltage generating circuit generating a reference voltage; and
a comparator having a hysteresis characteristic and comprising a first terminal and a second terminal, the second terminal inputting the reference voltage, andwherein one end of the current source is connected between the one of the plurality of input terminals and the first terminal, and the output of the voltage sensor is generated based on an output of the comparator.
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Abstract
A battery voltage monitoring apparatus monitoring an assembled battery voltage, the assembled battery including a plurality of battery cells, includes a voltage sensor detecting potential of the plurality of battery cells; an output logic circuit outputting a potential detect signal based on an output of the voltage sensor, the potential detect signal representing that abnormal potential is detected; and a delay circuit adding certain delay to the output of the voltage sensor and outputting the delayed voltage detect signal to the output logic circuit; wherein, the voltage sensor comprises at least one comparator having hysteresis characteristic, and detects the potential of the battery cell based on an output of the comparator.
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Citations
20 Claims
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1. A battery voltage monitoring apparatus for monitoring an assembled battery voltage, the assembled battery including a plurality of battery cells, said battery voltage monitoring apparatus comprising:
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a plurality of input terminals, each input terminal connected to the plurality of battery cells respectively through a potential measurement line; a voltage sensor connected to plurality of input terminals the voltage sensor detecting a potential of the plurality of battery cells; an output logic circuit outputting a potential detect signal based on an output of the voltage sensor, the potential detect signal representing that an abnormal potential is detected; and a current source, wherein the voltage sensor comprises; a reference voltage generating circuit generating a reference voltage; and a comparator having a hysteresis characteristic and comprising a first terminal and a second terminal, the second terminal inputting the reference voltage, and wherein one end of the current source is connected between the one of the plurality of input terminals and the first terminal, and the output of the voltage sensor is generated based on an output of the comparator. - View Dependent Claims (2, 3, 4, 5, 8, 9, 10, 11, 12, 13)
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6. The battery voltage monitoring apparatus according to claim , wherein the battery voltage monitoring apparatus comprises a plurality of voltage sensor modules, each voltage sensor module including a plurality of voltage sensors, and
wherein the comparator having a hysteresis characteristic is provided to the voltage sensor, the voltage sensor is connected to a terminal, the terminal is supplied with a source potential of the voltage sensor module.
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14. A battery voltage monitoring apparatus monitoring an assembled battery voltage, the assembled battery including a plurality of battery cells, comprising:
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a plurality of input terminals, each input terminal connected to the plurality of battery cells respectively through a potential measurement line; a voltage sensor connected to one of the plurality of input terminals, the voltage sensor detecting a potential of each of the plurality of battery cells; an output logic circuit outputting a potential detect signal based on an output of the voltage sensor, the potential detect signal representing that an abnormal potential is detected; and a current source, wherein the voltage sensor comprises; a reference voltage generating circuit generating a reference voltage; and a comparator having a hysteresis characteristic and comprising a first terminal and a second terminal, the second terminal inputting the reference voltage, and wherein one end of the current source is connected between the one of the plurality of input terminals and the first terminal, and the output of the voltage sensor is generated based on an output of the comparator. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A battery voltage monitoring apparatus monitoring an assembled battery voltage, the assembled battery including a plurality of battery cells, comprising:
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a plurality of input terminals, each input terminal connected to the plurality of battery cells respectively through a potential measurement line; a voltage sensor connected to one of the plurality of input terminals, the voltage sensor detecting a potential of each of the plurality of battery cells; and a current source, wherein the voltage sensor comprises; a reference voltage generating circuit generating a reference voltage; and a comparator having a hysteresis characteristic and comprising a first terminal and a second terminal, the second terminal inputting the reference voltage, and wherein one end of the current source is connected between the one of the plurality of input terminals and the first terminal, and the output of the voltage sensor is generated based on an output of the comparator.
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Specification