- Patent Title: Cell balancing module and method in voltage balancing device for a stack of batteries which compares the cell voltages to a coded reference voltage derived from at least two reference voltages
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Application No.: US13985277Application Date: 2012-02-14
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Publication No.: US09647463B2Publication Date: 2017-05-09
- Inventor: Manfred Brandl , Sandeep Vernekar , Vijay Ele , Sudhakar Singamala , V. Veeresh Babu
- Applicant: Manfred Brandl , Sandeep Vernekar , Vijay Ele , Sudhakar Singamala , V. Veeresh Babu
- Applicant Address: AT Unterpremstaetten
- Assignee: AMS AG
- Current Assignee: AMS AG
- Current Assignee Address: AT Unterpremstaetten
- Agency: McDermott Will & Emery LLP
- Priority: EP11154561 20110215
- International Application: PCT/EP2012/052490 WO 20120214
- International Announcement: WO2012/110497 WO 20120823
- Main IPC: H02J7/00
- IPC: H02J7/00 ; B60L11/18 ; H01M10/42
Abstract:
The invention relates to a cell balancing module, particularly for voltage balancing of a stack of batteries. The cell balancing module comprises an interface (SPI, VrefH, VrefL) to input a coded reference voltage (Vref) and input nodes (In1, . . . , InN) for connecting a stack of energy storage cells (BAT1, . . . , BATn). A switching unit (SW) is connected to each of the input nodes (In1, . . . , InN) and a local balancing unit (loc) coupled to the switching unit (SW) and the interface (SPI, VrefH, VrefL). The local balancing unit (loc) is designed to compare the coded reference voltage (Vref) with cell voltages (VBAT1, . . . , VBATn) of the stack of energy storage cells (BAT1, . . . , BATn) to be connected and to charge balance the stack of energy storage cells (BAT1, . . . , BATn) to be connected depending on the comparison of coded reference voltage (Vref) and cell voltages (VBAT1, . . . , VBATn). The invention also relates to a voltage balancing device and method for cell balancing, particularly for voltage balancing of a stack of batteries.
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