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US 12,603,336 B2Granted
Battery monitoring system for measuring hydrogen concentration to detect battery cell overtemperature and predict thermal runaway
AssigneeGM Global Technology Operations LLC
InventorsMichelle H. Wiebenga, Rasoul Salehi, Lei Wang, Wei Li
Life of this patent
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Abstract
A battery monitoring system includes a hydrogen sensing system configured to selectively measure a plurality of hydrogen concentrations in a plurality of battery cells, respectively. A controller is configured to detect battery cell overtemperature in at least one of the plurality of battery cells in response to a corresponding one of the plurality of measured hydrogen concentrations of the plurality of battery cells.
Claims16
A battery monitoring system comprising:
- a hydrogen sensing system configured to selectively measure a plurality of hydrogen concentrations in a plurality of battery cells, respectively;
- and
- a controller configured to detect battery cell overtemperature in at least one of the plurality of battery cells in response to a corresponding one of the plurality of hydrogen concentrations of the plurality of battery cells, wherein detecting battery cell overtemperature includes:
- causing the hydrogen sensing system to measure a first hydrogen concentration of one of the plurality of battery cells;
- if hydrogen is detected, calculating a rate of increase of the first hydrogen concentration;
- if the rate of increase of the first hydrogen concentration is greater than a predetermined rate, diagnosing a thermal runaway event for a corresponding one of the plurality of battery cells;
- and
- if the rate of increase of the first hydrogen concentration is less than the predetermined rate, diagnosing an overtemperature event for a corresponding one of the plurality of battery cells.
5 more elements
A method for monitoring overtemperature in a battery module including a plurality of battery cells, comprising:
- selectively measuring a plurality of hydrogen concentrations within a plurality of battery cells, respectively;
- and
- detecting battery cell overtemperature in at least one of the plurality of battery cells in response to a corresponding one of the plurality of the hydrogen concentrations of the plurality of battery cells, wherein detecting battery cell overtemperature includes:
- measuring a first hydrogen concentration of one of the plurality of battery cells;
- in response to detecting hydrogen in the one of the plurality of battery cells, comparing the first hydrogen concentration to a predetermined hydrogen concentration;
- in response to the first hydrogen concentration being less than or equal to the predetermined hydrogen concentration, increasing a monitoring frequency;
- and
- in response to the first hydrogen concentration being greater than the predetermined hydrogen concentration, diagnosing an overtemperature event in a corresponding one of the plurality of battery cells.
5 more elements
Dependencies are inferred from the claim text.