What is a BMS chip
Time:2020-03-04
Views:670
Battery, motor, and electronic control technology are the core technologies of electric vehicles, and the most core function in electronic control is the BMS (Battery Management System), which is the battery management system.
As a major pillar behind intelligent driving, BMS protects the safe use of electric vehicle power batteries. BMS is a management system that monitors and manages batteries. By collecting and calculating parameters such as voltage, current, temperature, and SOC (state of charge), it controls the charging and discharging process of batteries, achieves battery protection, and improves the overall performance of batteries. It is an important link connecting on-board power batteries and electric vehicles.
The main chips used in BMS include AFE, MCU, ADC, digital isolators, etc. Among them, AFE analog front-end chips (specifically referred to as battery sampling chips in BMS) are used to collect information such as battery cell voltage and temperature, while also supporting battery equalization function. Generally, the chips will integrate passive equalization function. The MCU chip in BMS plays a role in processing the information collected by the BMS AFE chip and calculating the State of Charge (SOC). SOC is an important parameter in battery management systems, and other parameters are calculated based on SOC. Therefore, battery management systems require high performance of MCU chips.
At present, the technical threshold for vehicle grade BMS chips is high, and the suppliers are mainly foreign enterprises. The rapid development of the new energy vehicle industry has driven the continuous expansion of the overall BMS market, and the importance of BMS chips is becoming increasingly prominent. However, the technical threshold for BMS chips is relatively high. For example, BMS MCU chips require a large amount of knowledge and experience accumulation. Currently, a large number of mature solutions are mastered by manufacturers such as NXP; The main suppliers of BMS AFE are overseas companies such as Adeno and Texas Instruments. Enterprises lack long-term research and development accumulation and a large amount of data accumulation, making it difficult to develop BMS chips that truly meet downstream application needs.
The certification requirements for vehicle grade BMS chips are strict and the certification cycle is long. With the continuous promotion of the national "carbon neutrality" strategy, China‘s new energy vehicle industry will usher in a golden 5 years, providing a vast blue ocean for the application of BMS chips in the market. Before entering the supply chain system of the entire vehicle factory, automotive grade semiconductor enterprises generally need to pass certifications such as the quality management system IATF 16949 and the reliability standard AEC-Q series. After completing the certification and review of relevant vehicle level standards and specifications, it is necessary to undergo rigorous application testing verification and long-term on board verification before entering the automotive front-end supply chain.
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