Battery pack
First Claim
Patent Images
1. A battery pack, comprising:
- a battery case for housing secondary batteries inside the battery case;
a battery management unit for managing states of the secondary batteries;
an information transfer circuit which is connected to the battery management unit and transfers information about the secondary batteries to the battery management unit;
a diagnostic circuit which is branched and formed from the information transfer circuit and is extended to an outer surface of the battery case;
a cell monitoring unit for monitoring states of the individual secondary batteries,a first power source line for supplying electric power to both of the battery management unit and the cell monitoring unit;
a second power source line for supplying electric power to only the cell monitoring unit; and
a breaking unit which is interposed in both of the second power source line and a portion between the cell monitoring unit and the battery management unit in the first power source line and breaks power feeding from the first power source line to the cell monitoring unit at the time of power feeding from the second power source line,wherein the information transfer circuit has a communication circuit for making connection between the battery management unit and the cell monitoring unit, andthe diagnostic circuit has a first diagnostic circuit branched and formed from the communication circuit.
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Abstract
A battery pack for housing plural secondary batteries inside a case includes a battery management unit for managing states of the plural secondary batteries, an information transfer circuit which is connected to the battery management unit and transfers information about the secondary batteries to the battery management unit, and a diagnostic circuit which is branched and formed from the information transfer circuit and is extended to an outer surface of the case.
14 Citations
7 Claims
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1. A battery pack, comprising:
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a battery case for housing secondary batteries inside the battery case; a battery management unit for managing states of the secondary batteries; an information transfer circuit which is connected to the battery management unit and transfers information about the secondary batteries to the battery management unit; a diagnostic circuit which is branched and formed from the information transfer circuit and is extended to an outer surface of the battery case; a cell monitoring unit for monitoring states of the individual secondary batteries, a first power source line for supplying electric power to both of the battery management unit and the cell monitoring unit; a second power source line for supplying electric power to only the cell monitoring unit; and a breaking unit which is interposed in both of the second power source line and a portion between the cell monitoring unit and the battery management unit in the first power source line and breaks power feeding from the first power source line to the cell monitoring unit at the time of power feeding from the second power source line, wherein the information transfer circuit has a communication circuit for making connection between the battery management unit and the cell monitoring unit, and the diagnostic circuit has a first diagnostic circuit branched and formed from the communication circuit. - View Dependent Claims (2, 3, 4)
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5. The battery pack, comprising:
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a battery case for housing secondary batteries inside the battery case; a battery management unit for managing states of the secondary batteries; an information transfer circuit which is connected to the battery management unit and transfers information about the secondary batteries to the battery management unit; a diagnostic circuit which is branched and formed from the information transfer circuit and is extended to an outer surface of the battery case; a cell monitoring unit for monitoring states of the-individual secondary batteries; a first power source line for supplying electric power to both of the battery management unit and the cell monitoring unit; a second power source line for supplying electric power to only the cell monitoring unit; and a breaking unit which is interposed in both of the second power source line and a portion between the cell monitoring unit and the battery management unit in the first power source line and breaks power feeding from the first power source line to the cell monitoring unit at the time of power feeding from the second power source line. - View Dependent Claims (6, 7)
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Specification