Invention Grant
US08970063B2 Method and arrangement for balancing voltages of series connection of storage units for electrical energy
有权
用于平衡用于电能的存储单元的串联连接电压的方法和装置
- Patent Title: Method and arrangement for balancing voltages of series connection of storage units for electrical energy
- Patent Title (中): 用于平衡用于电能的存储单元的串联连接电压的方法和装置
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Application No.: US13152014Application Date: 2011-06-02
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Publication No.: US08970063B2Publication Date: 2015-03-03
- Inventor: Ora Veli-Matti Leppänen
- Applicant: Ora Veli-Matti Leppänen
- Applicant Address: FI Helsinki
- Assignee: ABB Oy
- Current Assignee: ABB Oy
- Current Assignee Address: FI Helsinki
- Agency: Buchanan Ingersoll & Rooney PC
- Priority: EP10164920 20100604
- Main IPC: H02J3/14
- IPC: H02J3/14 ; H02J7/00
Abstract:
An arrangement which includes two or more energy storage units for electrical energy connected in series, and two or more balancing resistor units. Each balancing resistor unit is connected in parallel with one of the energy storage units. The arrangement also includes means for determining a voltage over all of the series-connected energy storage units and means for determining the energy storage unit voltages between poles of the energy storage units. One or more of the balancing resistor units include a base resistor unit and a control resistor unit connected in series and a switching device connected in parallel with the control resistor units. The arrangement further comprises means for determining reference voltages for the energy storage units based on the voltage over all of the series-connected capacitors and means for controlling the switching device to control the resistance of one or more of the balancing resistor units so that the energy storage unit voltage of each energy storage unit is maintained within a set range of the reference voltage for each energy storage unit.
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