POWER SUPPLY DEVICE FOR DETECTING DISCONNECTION OF VOLTAGE DETECTION LINES
First Claim
1. A power supply device comprising a plurality of battery units, wherein each of the battery unit comprising:
- a battery block that includes a plurality of battery cells serially connected to each other;
a voltage detecting circuit that detects the voltages of the battery cells, which constitute the battery block, through voltage detection lines;
a power supply circuit that supplies electric power for operating the voltage detecting circuit from the battery block; and
a disconnection detecting circuit that detects disconnection of said voltage detection lines based on the detection voltages of the battery cells, which are detected by said voltage detecting circuit,wherein the battery blocks of the battery units are serially connected to each other to constitute a battery pack,wherein at least one of the battery blocks of the battery units includes an unbalance resistor that is connected to the at least one of the battery blocks to increase the power consumption of the at least one of the battery blocks so that a current flows in the voltage detection line that is connected to a node between the at least one of the battery blocks and an adjacent block of the battery blocks, which is connected next to the at least one of the battery blocks to which said unbalance resistor connected.
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Accused Products
Abstract
A power supply device includes battery units 10. Each unit 10 includes a battery block 2, a voltage detector 4, a power supply circuit 5, and a disconnection detector 8. The block 2 includes serially-connected battery cells 3. The voltage detector 4 detects the cell 3 voltages through voltage detection lines 6. The power supply circuit 5 supplies power from the block 2 to the voltage detector 4. The voltage detector 4 is powered by electric power from the block 2. The disconnection detector 8 detects disconnection of the lines 6 based on the detected cell 3 voltages. An unbalance resistor 12 is connected to one of the blocks 2 to increase power consumption of this block 2. Thus, a current flows in the line 6 that is connected to a node 16 between this block 2 and an adjacent block connected next to this block 2.
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Citations
7 Claims
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1. A power supply device comprising a plurality of battery units, wherein each of the battery unit comprising:
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a battery block that includes a plurality of battery cells serially connected to each other; a voltage detecting circuit that detects the voltages of the battery cells, which constitute the battery block, through voltage detection lines; a power supply circuit that supplies electric power for operating the voltage detecting circuit from the battery block; and a disconnection detecting circuit that detects disconnection of said voltage detection lines based on the detection voltages of the battery cells, which are detected by said voltage detecting circuit, wherein the battery blocks of the battery units are serially connected to each other to constitute a battery pack, wherein at least one of the battery blocks of the battery units includes an unbalance resistor that is connected to the at least one of the battery blocks to increase the power consumption of the at least one of the battery blocks so that a current flows in the voltage detection line that is connected to a node between the at least one of the battery blocks and an adjacent block of the battery blocks, which is connected next to the at least one of the battery blocks to which said unbalance resistor connected. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification