BMS of lithium or lifepo4 Battery Industry

Battery management system (BATTERY MANAGEMENT SYSTEM), or BMS, is the link between the battery and the user, mainly for secondary batteries. There are some disadvantages of secondary batteries, such as less stored energy, short life, series-parallel use problems, use of security, battery power estimation difficulties, etc. Battery performance is very complex, and the characteristics of different types of batteries also vary greatly. Battery management system (BMS) is mainly to improve battery utilization, prevent overcharge and overdischarge, extend battery life, and monitor battery status. As the BMS evolves, other functions will be added.

BMS is increasingly important, the industry is poised for development, mastering the "software technology + data" to become a dominant BMS companies to dominate the top priority. the key to BMS software technology lies in the excellent algorithm, the performance of the SOC accuracy continues to improve; data is the basis of BMS software technology, a sufficient amount of data to help the BMS algorithm to achieve qualitative improvement.

The basic working principle of BMS is that MCU collects the current, voltage, temperature and other battery working parameters provided by the sensor, so as to analyze the working condition of the battery, estimate its remaining power, and decide whether to start the protection circuit or carry out equalization; the working status of the battery can be displayed through the display, and can also communicate with the host computer, so as to realize remote monitoring.

BMS equalization technology is an important technology to solve the consistency of the battery. The capacity of the battery pack will be determined by the least discharged cell (barrel effect). In order to improve the life and stability of the whole pack, the BMS must be equalized to keep the capacity, voltage and other indicators of each cell within the same range. Equalization technology is a key technology of battery energy management system that is currently being researched and developed around the world.

In recent years, power battery companies and vehicle manufacturers have taken advantage of their market and resources, and the industry chain has been gradually extended to power battery BMS. 2016, the market share of professional BMS companies has dropped from 60% to 42%, and in the first half of 2017, their market share further dropped to about 30%, so how can professional BMS companies survive under the attack of the upstream and downstream of the industry chain?

Professional BMS enterprises, battery enterprises and vehicle enterprises, the market share of the three parties has undergone a huge shift. For any party, to win the battle for the BMS market, it is necessary to master the core technology of BMS, and it is optimistic that professional third-party BMS enterprises with the advantages of talent team and working condition database will dominate in the future.