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IP India · live recordAbstract
The cell balancing system 100 comprises a Battery Management System (BMS) 112 comprising a computing unit 114. The BMS 112, in turn the computing unit 114, receives power from the battery pack 102 through a DC-DC convertor 110. A switch matrix 106 connects the plurality of cells 104 of the battery pack 102 to the BMS 112, characterized in that, the BMS 112 adapted to monitor at least one parameter related to plurality of cells 104, select at least one target cell 104 based on the at least one parameter, and control power supply from the at least one target cell 104 to at least one load to perform cell balancing. A solution is provided for cell balancing by selectively choosing cells 104 to power the BMS 112 and other loads. Further, a multifunctional startup circuit 108 is provided in conjunction with the switch matrix 106 and the BMS 112.
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Claims:1. A cell balancing system (100) for a battery pack (102) in a vehicle, said system (100) comprises: a Battery Management System (BMS) (112) comprising a computing unit (114), said BMS (112) receives 5 power from said battery pack (102) through a DC-DC convertor (110); and a switch matrix (106) connects plurality of cells (104) of said battery pack (102) to said BMS (112), characterized in, said BMS (112) adapted to 10 monitor at least one parameter related to said plurality of cells (104), select at least one target cell (104) based on said at least one parameter, and control power supply from said at least one target cell (104) 15 to at least one load to perform cell balancing. 2. The system (100) as claimed in claim 1, wherein said load is selected from a group comprising but not limited to, an in-vehicle electronics, said BMS (112) and internal components, an auxiliary Electronic Control Units (ECUs) 20 of a vehicle and electrical loads of said vehicle. 3. The system (100) as claimed in claim 1, wherein said switch matrix (106) comprises at least one of plurality of relays, plurality of semiconductor switches and a combination of said plurality of relays and said plurality of 25 semiconductor switches. 4. A method of cell balancing in a battery pack (102), characterized by, said method comprises the steps of: monitoring at least one parameter related to said plurality of cells 30 (104); selecting at least one target cell (104) based on said at least one parameter, controlling power supply from said at least one target cell (104) to at least one load and performing cell balancing. 5. The method as claimed in claim 4, wherein said load is selected from a group comprising but not limited to, an in-vehicle electronics, said BMS (112) and internal components, an auxiliary Electronic Control Units (ECUs) of a vehicle and electrical loads of said vehicle. 10 6. The method as claimed in claim 4, wherein said step of selecting comprises operating a switch matrix (106) made up of at least one of plurality of relays, plurality of semiconductor switches and a combination of said plurality of relays and said plurality of semiconductor switches. 7. A cell balancing system (100) for a battery pack (102), said system (100) comprises: a Battery Management System (BMS) (112) connected to said battery pack (102) through a DC-DC convertor (110); 20 a switch matrix (106) connected to plurality of cell (104) of said battery pack (102), characterized in that, a startup circuit (108) connected across said switch matrix (106) and said DC-DC convertor (110), said startup circuit (108) is configured to perform at least two functions, a first function to 25 provide initial power to said DC-DC convertor (110), and a second function to operate as a default circuit when no cell balancing is carried out. 8. The system (100) as claimed in claim 7, wherein said startup circuit (108) 30 is also configured to perform a third function which is to act as a fail-safe circuit when said switch matrix (106) fails. 9. The system (100) as claimed in claim 7, wherein said startup circuit (108) comprises at least two depletion MOSFETs operated though a gate driver (202), which in turn is triggered by said BMS (112), and a combination of a linear voltage regulator and a capacitor (210) 5 to supply power. 10. The system (100) as claimed in claim 7, wherein said switch matrix (106) comprises at least one of plurality of relays, plurality of semiconductor switches and a combination thereof. , Description:The cell balancing system 100 comprises a Battery Management System (BMS) 112 comprising a computing unit 114. The BMS 112, in turn the computing unit 114, receives power from the battery pack 102 through a DC-DC convertor 110. A switch matrix 106 connects the plurality of cells 104 of the battery pack 102 to the BMS 112, characterized in that, the BMS 112 adapted to monitor at least one parameter related to plurality of cells 104, select at least one target cell 104 based on the at least one parameter, and control power supply from the at least one target cell 104 to at least one load to perform cell balancing. A solution is provided for cell balancing by selectively choosing cells 104 to power the BMS 112 and other loads. Further, a multifunctional startup circuit 108 is provided in conjunction with the switch matrix 106 and the BMS 112.