Electrode based charging control for vehicle battery
AssigneeGM Global Technology Operations LLC
InventorsBrian J. Koch, Jing Gao, Xi Chen
Life of this patent
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Abstract
A method for controlling charging of a battery to minimize or avoid lithium plating. The method may include charging the battery during with a first charge current having a first charge profile, monitoring charging of the battery with the first charge current, and thereafter charging the battery with a second charge current having a cathode charge profile to prevent a cathode potential of the battery from exceeding a cathode threshold.
Claims20
A method for minimizing or avoiding lithium plating when direct current (DC) fast charging a battery included in a vehicle, comprising:
- charging the battery during a first charging phase with a first charge current having a first charge profile;
- and
- commencing a second charging phase for charging the battery with a second charge current having a cathode charge profile, the cathode charge profile incrementally decaying the second charge current to prevent a cathode potential of a cathode of the battery from exceeding a cathode threshold.
A method for minimizing or avoiding lithium plating when direct current (DC) fast charging a battery included in a vehicle, comprising:
- charging the battery during a first charging phase with a first charge current having a first charge profile;
- monitoring a cathode potential of a cathode of the battery during the first charging phase;
- and
- in response to the cathode potential approaching a cathode threshold, commencing a second charging phase for charging the battery with a second charge current having a cathode charge profile, the cathode charge profile adjusting the second charge current relative to the first charge current to prevent the cathode potential from exceeding the cathode threshold.
A system for minimizing or avoiding lithium plating when direct current (DC) fast charging a battery included in a vehicle, comprising:
- a battery monitor configured for monitoring a voltage of the battery;
- and
- a battery charger configured for
- charging the battery during a first charging phase with a first charge current having a first charge profile;
- and
- commencing a second charging phase for charging the battery with a second charge current having a cathode charge profile in response to the voltage surpassing a first voltage threshold, the cathode charge profile adjusting the second charge current relative to the first charge current to prevent a cathode potential of a cathode of the battery from exceeding a cathode threshold.
Dependencies are inferred from the claim text.