Li-ion battery high voltage distribution system architecture
AssigneeThe Boeing Company
InventorsSheverria Antony Aikens, Mehdy Barekatein, Glen M. Brown
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Abstract
Systems and methods for operating a lithium-ion battery high-voltage distribution system architecture are disclosed. A battery pack includes: a plurality of lithium-ion battery cells; a disconnect mechanism operable in an operational position between a battery bus and the plurality of lithium-ion battery cells and a bypass position between the battery bus and a bus-power pass through; and a battery management system. The battery management system is configured to monitor battery pack performance, and responsive to detecting a triggering event in the battery pack performance, cause the disconnect mechanism to be in the bypass position.
Claims20
A method of operating a plurality of lithium-ion battery packs connected in series, wherein at least a first battery pack in the plurality of lithium-ion battery packs is identified as an operational battery pack comprising a battery management system (BMS) and initially having an associated first disconnect mechanism in an operational position, and wherein at least a second battery pack in the plurality of lithium-ion battery packs is identified as a reserve battery pack initially having an associated second disconnect mechanism in a bypass position, the method comprising:
- operating the associated first disconnect mechanism of the operational battery pack in the operational position;
- monitoring a battery of the operational battery pack via a sensor;
- responsive to detecting a short circuit within the operational battery pack via the sensor, causing via the BMS the associated first disconnect mechanism to operate in the bypass position, the bypass position electrically bypassing the operational battery pack;
- transmitting, to the reserve battery pack, a communication indicating that the associated first disconnect mechanism of the operational battery pack is in the bypass position, the communication including a notification of the short circuit and that the operational battery pack is operating in the bypass position, and
- responsive to receiving the communication at the reserve battery pack transitioning the associated second disconnect mechanism of the reserve battery pack to the operational position;
- and
- responsive to receiving the communication at the reserve battery pack, increasing a threshold current value for detecting the short circuit.
A method of operating a battery system having a plurality of battery packs connected in series, wherein at least one of the battery packs in the plurality of battery packs is identified as an operational battery pack initially having an associated disconnect mechanism in an operational position, and wherein at least one of the battery packs in the plurality of battery packs is identified as a reserve battery pack initially having an associated disconnect mechanism a bypass position, the method comprising:
- monitoring the operational battery pack via a sensor;
- detecting a short circuit based at least in part on sensor signals received from the sensor;
- responsive to detecting the short circuit, switching the disconnect mechanism associated with the operational battery pack from the operational position to the bypass position;
- and
- further responsive to detecting the short circuit, transmitting a communication to the reserve battery pack, the communication including a notification of the short circuit, to thereby cause the disconnect mechanism associated with the reserve battery pack to switch from the bypass position to the operational position and increase a threshold current value for detecting the short circuit.
A method of operating a battery system having a plurality of battery packs connected in series, wherein at least one of the battery packs in the plurality of battery packs is identified as an operational battery pack initially having an associated disconnect mechanism in an operational position, and wherein at least one of the battery packs in the plurality of battery packs is identified as a reserve battery pack initially having an associated disconnect mechanism a bypass position, the method comprising:
- receiving a communication from the operational battery pack, the communication including a notification of a short circuit;
- responsive to receiving the communication, switching the disconnect mechanism associated with the reserve battery pack to switch from the bypass position to the operational position;
- and
- increasing a threshold current value for detecting the short circuit.
Dependencies are inferred from the claim text.