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US 9,318,910 B2Granted
Cell balancing circuit and cell balancing method using the same
AssigneeSamsung SDI Co., Ltd.
InventorTae-Jin Kim
Life of this patent
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Abstract
A battery cell balancing system is disclosed. In one embodiment, the system includes a plurality of battery cells arranged in series and a power supply configured to receive the cumulative voltage of the battery cells and output a first charging voltage to one of the battery cells that has a voltage less than a reference voltage. According to one embodiment, it is possible to implement a cell balancing operation using the cumulative voltage of the battery cells.
Claims20
A battery cell balancing system, comprising:
- a plurality of battery cells arranged in series;
- and
- a power supply configured to receive the cumulative voltage of the battery cells and output a first charging voltage to one of the battery cells that has a voltage less than a reference voltage,
- wherein the power supply comprises:
- first and second input terminals respectively connected to a positive end terminal and a negative end terminal of the battery cells;
- and
- an output terminal disposed on the opposite side of the first and second input terminals and selectively connected to at least one of the battery cells.
4 more elements
A battery pack voltage balancer, comprising:
- a plurality of switches respectively connected between positive and negative terminals of each of a plurality of battery cells within a battery pack, wherein each of the switches is configured to be selectively turned on;
- and
- a power supply configured to receive the cumulative voltage of the battery cells and provide a first charging voltage to one of the battery cells that has a voltage less than a reference voltage via a turned-on switch,
- wherein the power supply comprises:
- first and second input terminals respectively connected to a positive end terminal and a negative end terminal of the battery cells;
- and
- an output terminal disposed on the opposite side of the first and second input terminals and connected to the switches.
4 more elements
A battery cell balancing method, comprising:
- receiving the cumulative voltage of a plurality of battery cells coupled in series through first and second input terminals respectively connected to a positive end terminal and a negative end terminal of the battery cells;
- converting the received cumulative voltage to a first charging voltage;
- and providing the first charging voltage to one of the battery cells that has a voltage less than a reference voltage through an output terminal disposed on the opposite side of the first and second input terminals and selectively connected to the batter cells.
Dependencies are inferred from the claim text.