An auxiliary battery charging apparatus 1 is used for charging an auxiliary battery 3 from a main battery 4. The main battery has at least a first module 5-1 including a plurality of first cells 6-1. The charging apparatus has an intermediate storage device 13 (e.g. a transformer or capacitor) for connection to the auxiliary battery. A first switch unit 10 selectively connects one or more of the first cells to the intermediate storage device. A charging control unit 9 receives control signal (BAL1) to identify one or more of the first cells having a relatively low depth-of-discharge. The control unit outputs a control signal (SW1) to control the first switch unit so as to connect the identified cells to the intermediate storage device and thus charge the auxiliary battery. The auxiliary battery charging apparatus is used in an electric vehicle (e.g. EV, HEV, PHEV, BEV).
Auxiliary battery charging apparatus and method
30.11.2016
Patent
Elektronische Ressource
Englisch
Apparatus and Method for charging using auxiliary battery
Europäisches Patentamt | 2023
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