Internal short detection and mitigation in batteries
AssigneeRobert Bosch GmbH
InventorsJohn F. Christensen, Aleksandar Kojic
Life of this patent
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Abstract
Devices, systems, and techniques for identifying a dendrite material within a battery. The method comprising receiving, by a battery management system, an output from sensing circuitry within the battery indicative of a first voltage level, detecting, by the battery management system, a change from the first voltage level to a second voltage level that is indicative of an internal short within a sensing sheet, determining by the battery management system, a resistance and a two-dimensional position of the internal short within the sensing sheet, and identifying, by the battery management system, a dendrite material based on the resistance of the internal short.
Claims7
A system comprising:
- a battery having
- an anode;
- a cathode;
- an electrically insulating separator having a sensing sheet and located between the anode and the cathode, wherein the electrically insulating separator electrically insulates the anode from the cathode, and wherein the sensing sheet includes three or more sensing tabs located at a periphery of the sensing sheet;
- and
- sensing circuitry configured to
- electrically connect to each of the three or more sensing tabs,
- determine at least one of a resistance, a current, or a voltage at each of the three or more sensing tabs, and
- output an indication of the at least one of the resistance, the current, or the voltage at each of the three or more sensing tabs;
- and
- a battery management system communicatively connected to the battery and configured to
- receive the output from the sensing circuitry, and
- determine a resistance and a two-dimensional position of an internal short on the sensing sheet based on the output from the sensing circuitry.
Dependencies are inferred from the claim text.