Battery management system and driving method thereof
AssigneeSamsung SDI Co., Ltd.
InventorsYong-Jun Tae, Yusai Murakami, Gye-Jong Lim
Life of this patent
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Abstract
A battery management system (BMS) includes at least one sub-BMS and a main BMS. The at least one sub-BMS measures information about a battery, and generates an activation signal according to operating state. The main BMS receives the activation signal and determines the operating state of the at least two sub-BMSs. If the at least two sub-BMSs normally operate, the main BMS generates a synchronization signal and transfers the same to the sub-BMSs. The at least one sub-BMS measures the information about the battery according to the synchronization signal.
Claims18
A battery management system (BMS) comprising:
- at least two sub-BMSs configured to measure information about a battery and to generate an activation signal according to an operating state;
- and
- a main BMS configured to receive the activation signal to determine the operating state of the at least two sub-BMSs, and to generate and transfer a synchronization signal to the sub-BMSs when the at least two sub-BMSs operate normally,
- wherein the at least two sub-BMSs are configured to measure the information about the battery according to the synchronization signal.
A method of driving a battery management system (BMS) including at least two sub-BMSs comprising:
- generating an activation signal by the at least two sub-BMSs according to an operating state;
- determining the operating state of the at least two sub-BMSs upon receiving the activation signal, and generating a synchronization signal when the at least two sub-BMSs operate normally;
- transferring the synchronization signal to the at least two sub-BMSs;
- measuring information about a battery according to the synchronization signal, the information about the battery being measured by the at least two sub-BMSs;
- and
- receiving the information about the battery measured by the at least two sub-BMSs according to the synchronization signal.
A vehicle system comprising:
- a plurality of battery cells in series;
- a battery;
- a main battery management system (BMS);
- and
- at least two sub-battery management systems (sub-BMSs), wherein:
- the at least two sub-BMSs are configured to measure information about the battery and generate activation signals according to an operating state,
- the main BMS is configured to receive the activation signals to determine the operating state of the at least two sub-BMSs, and to generate and transfer a synchronization signal to the at least two sub-BMSs when the at least two sub-BMSs operate normally, and
- the at least two sub-BMSs are configured to measure the information about the battery according to the synchronization signal.
A method of matching a synchronization of a plurality of battery management systems (BMSs) comprising a main BMS, at least two sub-BMSs, and a plurality of battery cells organized in a battery stack, the method comprising:
- determining a power-on or power-off state of each of the at least two sub-BMSs;
- generating an activation signal from each of the sub-BMS in the power-on state;
- transmitting the activation signal through an AND gate to the main BMS;
- when all of the at least two sub-BMSs are in the power-on state, generating a synchronization signal in the main BMS;
- transmitting the synchronization signal to the at least two sub-BMSs;
- detecting a voltage sequentially in each of the plurality of battery cells associated with a specific one of the at least two sub-BMSs according to the synchronization signal;
- simultaneously detecting the voltage in corresponding battery cells of each other of the at least two sub-BMSs;
- and
- subsequently determining a current of the battery.
Dependencies are inferred from the claim text.