High-precision battery model

Abstract

The invention discloses a high-precision battery model. The battery model comprises a micro control unit (MCU), a power supply unit, a temperature simulation unit, a battery model unit and an RS485 communication unit; the power supply unit internally adopts a low-dropout linear voltage regulator LDO for stabilized voltage output; a battery simulation unit internally adopts a high-precision ADC anda DAC for output sampling and control and can simulate a short circuit, an open circuit, reverse connection and other faults; the temperature simulation unit controls the output of simulation temperature and voltage through the micro control unit (MCU) to simulate the real battery temperature; the RS485 communication unit is connected to a 485 communication interface in the micro control unit (MCU) to control the battery simulation unit. Compared with a battery simulator in the market, the high-precision battery model has the advantages that the output precision and the response speed are higher, isolated output is adopted, and multilevel series connection can be conducted for simulating the battery model.

Description

technical field [0001] The invention relates to the field of electric vehicle power supplies, in particular to a high-precision battery model. Background technique [0002] With the emergence of new energy electric vehicles and its rapid development in society, people are not only concerned about its low-carbon environmental protection and energy saving, but also pay more and more attention to its safety and reliability, and new energy electric vehicles The safety and reliability of the car depend to a large extent on the battery management system BMS of the electronic control unit. The main function of the battery management system BMS is to improve the utilization rate of the battery, prevent the battery from overcharging and overdischarging, and prolong the battery life. life, to monitor the state of the battery. For new energy electric vehicles, the battery management system BMS system is very important and is the core housekeeper of the battery. [0003] In the develo...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, most of the battery simulators used to test the BMS of the battery management system adopt the DC / DC scheme. The battery simulator of the DC / DC scheme uses a switching power supply internally, and the switching frequency interferes a lot with the output voltage ripple, and The output response speed of the battery simulator of this scheme is low, and the output accuracy is also low, which has a certain gap with the real battery output characteristics.

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