Invention Grant
- Patent Title: Battery heating circuits and methods with resonance components in series using voltage inversion based on predetermined conditions
- Patent Title (中): 基于预定条件的电压加热电路和谐振元件串联使用电压反转的方法
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Application No.: US13187279Application Date: 2011-07-20
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Publication No.: US08975872B2Publication Date: 2015-03-10
- Inventor: Wenhui Xu , Yaochuan Han , Wei Feng , Qinyao Yang , Wenjin Xia , Xianyin Li
- Applicant: Wenhui Xu , Yaochuan Han , Wei Feng , Qinyao Yang , Wenjin Xia , Xianyin Li
- Applicant Address: CN Shenzhen
- Assignee: BYD Company Limited
- Current Assignee: BYD Company Limited
- Current Assignee Address: CN Shenzhen
- Agency: Jones Day
- Priority: CN201010245288 20100730; CN201010274785 20100830; CN201110137264 20110523
- Main IPC: H01M10/46
- IPC: H01M10/46 ; H02J7/00 ; H01L23/34 ; H01M10/615 ; H01M10/625 ; H01M10/657 ; H01M10/6571 ; H02M3/158
Abstract:
A circuit for heating a battery includes a switch unit, control module, damping component, energy storage circuit, and superposition unit. The energy storage circuit forms a loop with the battery, and includes current and charge storage components. The damping component, switch unit, current storage component, and charge storage component connect in series. The control module switches on the switch unit so current flows between the battery and energy storage circuit and switches off the switch unit to stop current flow. The superposition unit superposes energy in the energy storage circuit with energy in the battery after the switch unit switches on and off. The control module switches the switch unit off after the first positive half cycle of current flow through the switch unit after the switch unit switches on. Voltage applied to the switch unit when the switch unit switches off is lower than the switch unit's voltage rating.
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