Novel distributed battery management system and method thereof

Abstract

The invention discloses a novel distributed battery management system, which includes an FPGA controller, a power battery module, a battery pack parameter acquisition module, a battery pack equalization module, a CAN bus physical layer module, an SPI bus physical layer module and a power module. The FPGA controller is internally integrated with a CAN bus controller and an SPI bus controller; the battery pack parameter acquisition module is connected to the SPI bus controller through an SPI bus; the battery pack equalization module is connected to the FPGA controller through the SPI bus; and the CAN bus physical layer module is connected to CANH and CANL antennas of the CAN bus controller through CANH and CANL lines, and one end of the CAN bus physical layer module is connected to a CANH and a CANL of a vehicle controller of an electric vehicle. According to the novel distributed battery management system, not only can battery voltage or current acquisition be completed quickly, but also the battery charging equalization efficiency is high; and CAN bus signal transmission is more reliable, and very high anti-interference ability is achieved.

Description

technical field [0001] The invention relates to a novel distributed battery management system and a method thereof, belonging to the technical field of battery management. Background technique [0002] The battery management system is the key core component of new energy electric vehicles. The currently widely used battery management system generally uses DSP or ARM as the control core. The serial working principle of these control chips brings long time for parameter collection and algorithm, and obvious delay. It cannot meet the real-time performance of power battery monitoring. [0003] Inaccurate collection of SOC parameters will bring a large cumulative error. At the same time, the equalization algorithm and SOC estimation time are long, and the execution of the interface with the peripherals is performed serially, which is not conducive to timely monitoring of the real-time status of the power battery. Contents of the invention [0004] Aiming at the deficiencies ex...

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Problems solved by technology

[0002] The battery management system is the key core component of new energy electric vehicles. Currently, the commonly used battery management systems generally use DSP or ARM as the control core. The serial working principle of these control chips brings long time for parameter collection and algorithm, and obvious delay. Can not meet the real-time performance of power battery monitoring

[0003] Inaccurate collection of SOC parameters will bring a large cumulative error. At the same time, the equalization algorithm and SOC estimation time are long, and the execution of the interface with the peripherals is executed serially, which is not conducive to timely monitoring of the real-time status of the power battery.

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