Battery management and acquisition subsystem of new energy vehicle and method for controlling battery management and acquisition subsystem

Abstract

The invention discloses a battery management and acquisition subsystem of a new energy vehicle. The battery management and acquisition subsystem contains a balancing algorithm identifying and balancing processing algorithm and comprises an MCU (microprogrammed control unit) module, an LTC6802 module, a single voltage acquisition / discharge circuit, a whole-set and half-set acquisition circuit, a temperature acquisition module, a CAN (controller area network) communication module, an acquisition subsystem sequence address setting module, a power processing module and a digital optocoupler isolation module. 12 channels of single voltages of battery sets are acquired by an LTC6802 core technology, whole-set and half-set voltages are acquired, and 16 temperatures are acquired by a temperature acquisition circuit. A battery management system is provided with four channels of CAN nodes, each CAN node accesses four battery management and acquisition subsystems, accordingly, voltages of the maximum 192 single batteries can be acquired, 16 whole-set voltages, 16 half-set batteries and 256 temperatures can be acquired, and the service requirement of the current new energy vehicle can be met completely.

Description

technical field [0001] The invention relates to a battery management acquisition subsystem device for a new energy vehicle and a control method thereof. Background technique [0002] As an important part of the battery management system, the battery management acquisition subsystem undertakes the important task of online monitoring of power batteries for new energy vehicles. Its real-time and accurate detection of the voltage of each unit of the power battery pack, the voltage of half rent / group, and the temperature of different points of the battery box is the battery management system's online SOC estimation, SOH estimation, thermal management, charge and discharge control, balance control, fault The basis for the implementation of diagnostic strategies, its rapid processing capability of a large amount of data and its real-time interaction capability with the central controller also play a key role in the effective operation of the entire battery management system. [00...

AI Technical Summary

Problems solved by technology

[0008] 5) The number of battery management and acquisition subsystems is large, there are many built-in modules, and the power consumption is large. At present, the system rarely considers low power consumption design

Since the battery management system often uses the managed battery as the energy system, if there is no low-power design function, the battery life will be reduced and resources will be wasted

[0009] 6) Aiming at the inconsistency of the battery during long-term use, its technical solutions are lacking

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