An electric battery comprising a plurality of cell groups (30, 32, 34, 36) connected in series, each cell group configured to convert chemical energy into electrical energy, each cell group comprising a single lithium ion-cell, or a plurality of lithium-ion cells (30, 32, 34, 36) connected in parallel. The electric battery also comprises for each of the plurality of cell groups (30, 32, 34, 36) measurement and processing circuitry located at the cell group, and a cell model configured for the cell group in dependence on measurements of the cell group taken during testing. The measurement and processing circuitry comprises a non-volatile memory, a measurement arrangement (38, 44) configured to measure at least one of an electrical property or a physical property of the cell group, an analogue to digital converter "ADC" (40, 42, 46) configured to convert an analogue signal received by the ADC from the measurement arrangement to a corresponding digital signal, and a microcontroller. The microcontroller is configured to process the digital signal received from the ADC (40, 42, 46) to determine a condition of the cell group in dependence on one or more measurements of the cell group and the cell model, and to store the determined condition of the cell group in the non-volatile memory. The cell model is stored in memory local to the microcontroller.
BATTERY CONDITION DETERMINATION
BATTERIEZUSTANDSBESTIMMUNG
DÉTERMINATION D'ÉTAT DE BATTERIE
2017-03-08
Patent
Electronic Resource
English
IPC: | H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES |