Artery AT32 microcontrollers strengthen the stable and reliable application of Smart BMS protection board

Article by: Artery Technology

ARTERY’s Cortex-M4-based AT32 microcontrollers support CAN, RS-485, UART and other peripheral interfaces, and process data according to battery configuration files to make appropriate decisions.

In recent years, with higher requirements for the production and manufacturing of new energy vehicles and an increasing demand for safer drive batteries, the BMS high-performance drive battery has been highly praised and its market share has increased. greatly increased. According to statistics, the BMS market size in China reached RMB 9.7 billion in 2020, with annual growth of 6.6%, and is expected to exceed RMB 12 billion in 2022 and RMB 16 billion in 2025.

It is generally known that lithium-ion batteries contain highly active lithium. For a single lithium battery with limited capacity and density, its internal structure may be damaged by overcharging, over-discharging, or charging and discharging with excessive current, thus affecting the service life and performance. In addition, the lithium ion activity and the safety of lithium batteries are also affected when the operating temperature is too high or too low, which leads to the combustion and explosion of the lithium battery in the worst case. . Therefore, the BMS intelligent protection board, a set of safety protection devices, is designed in the lithium battery circuit to ensure battery safety, extend the service life, and make full use of the superior performance of the lithium batteries.

The BMS intelligent protection board is specially designed for large capacity lithium batteries, with voltage acquisition, active high current equalization, and overcharge, over-discharge, over-current and over-temperature protection functions. It is usually composed of MCU, analog front end (AFE), memory and other electronic devices, where the MCU serves as the control core of the BMS protection board.

Application of MCU ARTERY AT32 in Smart BMS protection board

ARTERY AT32 microcontrollers consist of Cortex-M4 processor core, support CAN*2, RS-485, UART and other peripheral interfaces to realize multiple communication modes, and process data according to configuration files batteries to make the appropriate decisions. During the charging and discharging process, AT32 MCU collects terminal voltage, temperature, charging/discharging current and total voltage of each battery cell in real time to protect the battery from overcharging and overdischarging excessive and prolong its life. When fully charged, it can ensure power balance current between individual cells (ternary lithium/lithium-iron: 30±5mA, LTO: 20±5mA), achieve equalized charging of cells in the battery and greatly improve the charging effect in the series. charging mode.

Featuring high performance, high stability, high cost performance and low power consumption, ARTERY AT32 microcontrollers have been put into mass production and widely applied in BMS intelligent protection boards. BMS protection boards based on ARTERY AT32F421 and AT32F413 series MCUs have been widely used in two/three-wheel electric vehicles, industrial drones, storage AGVs, energy storage for recreational vehicles, equipment marine, outdoor portable energy storage, household energy storage, commercial cleaning services, low-speed electric vehicles and other scenarios.

Advantages of ARTERY AT32F413 MCU for BMS intelligent protection board

  • Up to 200MHz CPU and 256KB Flash, meeting LED/LCD display requirements;
  • CAN*2, RS-485, UART and other on-chip peripheral interfaces to realize multiple communication modes;
  • CAN, connected to the electric vehicle control unit to improve system stability and data transfer rate;
  • I2C, connected to AFE for parameter configuration and real-time data acquisition;
  • Fast ADC conversion rate, to get battery voltage, current and temperature in time and properly handle relevant issues to avoid overcharging, over-discharging and overheating;
  • Operating temperature range of -40 to 105°C, suitable for complex environments and ensuring system stability;
  • Supports sLib (Security Library) to protect core codes.

In order to provide more competitive product solutions and keep up with the development trend of smart and connected vehicles, IoT and intellectualization, ARTERY Technology and Dongguan Daly Electronics Co. Ltd are collaborating to provide more competitive and better MCUs. integrated, accurate, secure and stable battery management solutions using their respective resources and advantages for win-win results. As a leading technology-oriented new energy enterprise, Daly plays a pivotal role in the development of new energy industry, and its DALY BMS protection board has competitive advantages such as sensitive detection, full-time intelligent balance, intelligent communication, control function, performance enhancement, slow degradation and transfer-type battery equalization.

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