INTER-MODULE VOLTAGE BALANCE CORRECTING CIRCUIT OF A POWER STORAGE SYSTEM
First Claim
1. An inter-module voltage balance correcting circuit of a power storage system including a plurality of storage modules connected in series, each of the storage modules including a plurality of storage cells connected in series, the inter-module voltage balance correcting circuit comprising:
- a resistance voltage dividing circuit that equally divides a series voltage across a first storage module and a second storage module connected in series; and
a pair of transistors that are turned ON/OFF in a complementary manner based on a voltage that appears between an intermediate connecting point between the first and second storage modules and a voltage dividing point of the resistance voltage dividing circuit,one of the pair of transistors being turned ON in a case where a dividing voltage that appears at the voltage dividing point becomes higher than an intermediate voltage that appears at the intermediate connecting point and causing a bypass discharge resistive element to be connected to a storage module situated at a positive side of the 2-series-connected modules,the other of the pair of transistors being turned ON in a case where the dividing voltage becomes lower than the intermediate voltage and causing a bypass discharge resistive element to be connected to a storage module situated at a negative side of the 2-series-connected modules.
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Accused Products
Abstract
Provided is an inter-module voltage balance correcting circuit of a power storage system including a plurality of storage modules connected in series, each of the storage modules including a plurality of storage cells connected in series. The inter-module voltage balance correcting circuit includes a resistance voltage dividing circuit (R1-R2) that equally divides a series voltage across a first storage module and a second storage module connected in series; and a pair of transistors that are turned ON/OFF complementarily based on a voltage (Vp1-Vp2) appearing between an intermediate connecting point (p2) between the storage modules M1, M2 in series and a voltage dividing point p1 of the resistance voltage dividing circuit, and a bypass discharge resistive element is selectively connected to modules by turning ON/OFF the complementary transistors.
20 Citations
6 Claims
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1. An inter-module voltage balance correcting circuit of a power storage system including a plurality of storage modules connected in series, each of the storage modules including a plurality of storage cells connected in series, the inter-module voltage balance correcting circuit comprising:
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a resistance voltage dividing circuit that equally divides a series voltage across a first storage module and a second storage module connected in series; and a pair of transistors that are turned ON/OFF in a complementary manner based on a voltage that appears between an intermediate connecting point between the first and second storage modules and a voltage dividing point of the resistance voltage dividing circuit, one of the pair of transistors being turned ON in a case where a dividing voltage that appears at the voltage dividing point becomes higher than an intermediate voltage that appears at the intermediate connecting point and causing a bypass discharge resistive element to be connected to a storage module situated at a positive side of the 2-series-connected modules, the other of the pair of transistors being turned ON in a case where the dividing voltage becomes lower than the intermediate voltage and causing a bypass discharge resistive element to be connected to a storage module situated at a negative side of the 2-series-connected modules. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification