Fault determination apparatus and fault determination method for a battery set

A fault determination method for a battery set for determining fault of a battery set comprising a plurality of serially connected cells, the method comprising the steps of;

• measuring voltage of each of the plurality of cells at a predetermined timing,
• computing a voltage difference between the maximum and the minimum values of the measured voltage,
• measuring electric current passing through the battery set at the same timing as said predetermined timing,
• storing a plurality of value pairs containing the measured electric current and said computed voltage difference,
• and determining fault of said battery set on the basis of the stored value pairs.

A fault determination apparatus for a battery set for determining fault of a battery set comprising a plurality of serially connected cells, the apparatus comprising:

• a voltmeter that measures a voltage value of each of the plurality of serially connected cells;
• an ammeter that measures electric current passing through the battery set;
• an electronic processing device that controls the fault determination apparatus and executes a fault determination process;
• a clock generating circuit that outputs a clock signal to the electronic processing device at a predetermined timing;
• and
• a power supply that supplies power to each portion of the fault determination apparatus, wherein the electronic processing device receives input voltage values measured by the voltmeter at the predetermined timing, computes a voltage difference between the maximum and the minimum values of the voltage, receives the value of electric current measured by the ammeter at the predetermined timing, stores a plurality of value pairs containing the electric current and the computed voltage difference, determines fault of the battery set on the basis of the stored pairs and outputs fault determination signals to at least a display.

A fault determination apparatus for a battery set for determining fault of a battery set comprising a plurality of serially connected cells, the apparatus comprising:

• a voltmeter that measures a voltage of each of the plurality of serially connected cells;
• an ammeter that measures electric current passing through the battery set;
• an electronic processing device that controls the fault determination apparatus and executes a fault determination process;
• and
• a power supply that supplies power to each portion of the fault determination apparatus, wherein the fault determination process includes, receiving the input voltage values measured by the voltmeter at a predetermined timing interval, computing a voltage difference between the maximum and the minimum voltage values, receiving the value of the electric current measured by the ammeter at the predetermined timing, storing a plurality of value pairs containing the electric current and the computed voltage difference, determining fault of the battery set on the basis of the stored pairs and outputting fault determination signals to at least a display.

A fault determination apparatus for a battery set for determining fault of a battery set comprising a plurality of serially connected cells, the apparatus comprising:

• a voltmeter that measures a voltage value of each of the plurality of serially connected cells;
• an ammeter that measures electric current passing through the battery set;
• a power supply that supplies power to each portion of the fault determination apparatus, and
• a fault determinator that receives voltage values measured by the voltmeter at a predetermined timing, computes a voltage difference between the maximum and minimum values of the voltage, receives the value of electric current measured by the ammeter at the predetermined timing, stores a plurality of value pairs containing the electric current and the computed voltage difference and determines fault of the battery set on the basis of the stored pairs.