Battery management systems (BMS) having isolated, distributed, daisy-chained battery module controllers
First Claim
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1. A battery management system comprising:
- a battery pack controller coupled to a plurality of daisy-chained battery module controllers to form a communication network,wherein each of the plurality of daisy-chained battery module controllers is connected to another battery module controller via a single communication wire to form a daisy-chained configuration, andwherein each of the plurality of daisy-chained battery module controllers is configured to be mounted on a battery module and comprises;
a shunt resistor configured to discharge energy from the battery module it is configured to be mounted on;
a processor configured to instruct the shunt resistor to discharge energy from the battery module it is configured to be mounted on;
a communication terminal configured to receive a message from the battery pack controller comprising an instruction to remove energy from the battery module it is configured to be mounted on; and
an isolation circuit configured to electrically isolate the battery module controller from other components within the battery management system coupled to the battery module controller, wherein the single communication wire is capacitively coupled to the processor via the isolation circuit.
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Abstract
Embodiments disclosed herein relate to a battery pack that may be used in an battery energy storage system. In an embodiment, the battery pack may include an integrated battery management system (BMS) having isolated, distributed, daisy-chained battery module controllers. The daisy-chained battery module controllers may be coupled to a battery pack controller, which may charge and/or discharge the battery pack using the battery modules controllers and a balancing charger.
95 Citations
18 Claims
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1. A battery management system comprising:
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a battery pack controller coupled to a plurality of daisy-chained battery module controllers to form a communication network, wherein each of the plurality of daisy-chained battery module controllers is connected to another battery module controller via a single communication wire to form a daisy-chained configuration, and wherein each of the plurality of daisy-chained battery module controllers is configured to be mounted on a battery module and comprises; a shunt resistor configured to discharge energy from the battery module it is configured to be mounted on; a processor configured to instruct the shunt resistor to discharge energy from the battery module it is configured to be mounted on; a communication terminal configured to receive a message from the battery pack controller comprising an instruction to remove energy from the battery module it is configured to be mounted on; and an isolation circuit configured to electrically isolate the battery module controller from other components within the battery management system coupled to the battery module controller, wherein the single communication wire is capacitively coupled to the processor via the isolation circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A battery module controller configured to be mounted on a battery module of a battery pack and to be coupled to another battery module controller via a single communication wire to form a daisy-chained configuration, the battery module controller comprising:
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a shunt resistor configured to remove energy from the battery module it is configured to be mounted on; a processor configured to instruct the shunt resistor to remove energy from the battery module it is configured to be mounted on; a communication terminal configured to receive a message, via the single communication wire, from an external battery pack controller comprising an instruction to remove energy from the battery module it is configured to be mounted on; and an isolation circuit configured to electrically isolate the battery module controller from other components within the battery pack coupled to the battery module controller, wherein the single communication wire is capacitively coupled to the processor via the isolation circuit. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for a battery module controller in a network of daisy-chained battery module controllers, each of which is coupled to another battery module controller via a single communication wire, the method comprising:
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electrically isolating, via an isolation circuit, the battery module controller from other battery module controllers of the network of daisy-chained battery module controllers, wherein a single communication wire is capacitively coupled to a processor of the battery module controller via the isolation circuit; receiving, at a communication terminal of the battery module controller via the single communication wire, a message comprising an address and an instruction from an external battery pack controller; determining, by the processor of the battery module controller, whether the address associated with the message matches a unique address of the battery module controller; and performing the instruction associated with the message in response to determining that the address associated with the message matches the unique address of the battery module controller. - View Dependent Claims (16, 17, 18)
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Specification