BMS is the "brain" of the power battery, which is responsible for managing and maintaining each module of the battery, preventing battery overcharge and overdischarge, monitoring battery status, and extending battery life. With the development of new energy vehicles, the market size of BMS has also grown significantly. At the same time, the market share of professional BMS companies, battery companies and vehicle companies has undergone tremendous changes. For any party, to win the battle of the BMS market, it must master the core technology of BMS.

Power battery companies are engaged in the research and development and production of battery cells. They have a better understanding of the electrochemical performance of battery cells, and are familiar with BMS research and development. This advantage is unique to power battery companies. The disadvantage is that power battery companies need to have a thorough understanding of the needs of the vehicle.

In fact, the three parties participating in the competition in the BMS market have changed. The market share of professional BMS R&D companies is constantly being eroded by vehicle companies and power battery companies, and their dominant position may be lost. According to statistics, in 2016, the market share of professional BMS companies has dropped from 60% to 42%. In the first half of 2017, its market share further dropped to about 30%, and the living space of professional BMS companies was continuously squeezed. In this battle for BMS market share, it is difficult for small and medium-sized BMS companies with weak R&D capabilities to get rid of the fate of being eliminated.

Mastering the core technology of BMS is the key to success
The complexity of the BMS system itself determines that it has strong technical barriers, which requires technical research and development time and technical precipitation. Whether it is a vehicle company, a power battery company or a professional BMS company, a firm grasp of the core BMS technology is the key to winning the competition.

So, what is the core technology of BMS? The BMS system generally includes a detection module and an operation control module. The former refers to measuring the voltage, current and temperature of the cell and the voltage of the battery pack, and transmits these signals to the operation module for processing and issuing instructions. Therefore, the operation control module is the brain of the BMS, which generally includes hardware, basic software, runtime environment (RTE) and application software. Among them, the application software is the core part. The environment developed with Simulink, a multi-domain simulation and model-based design tool for dynamic and embedded systems, is generally divided into two parts: battery state estimation algorithms and fault diagnosis and protection. State estimation includes SOC (StateOfCharge), SOP (StateOfPower), SOH (StateofHealth), as well as equalization and thermal management.

BMS expert Lin Jian believes that a complete BMS requires accurate SOC, SOP and SOH estimation, an effective dynamic balance control strategy, and a fault-tolerant and error-correcting mechanism. The core technology of BMS is the battery state estimation strategy . Whether it is a car company, a battery company or a professional BMS company, only algorithms that master high precision and high error correction ability can be considered to have the "killer" and win the competition.

What are the power battery companies in the BMS market competition?

When talking about the core technology of BMS, Lin Jian said bluntly that if he can't master the core technology of BMS, how can he talk about "overtaking on a curve"?

So, in the context of the growing BMS market, what should power battery companies do? Simply put, it is to get involved in the research and development of BMS. At present, powerful power battery companies have directly invested in or invested in BMS companies. For example, Sandton New Energy's parent company, Sound Group, has strategically invested in Udan Technology, combining the resource advantages of Sandton New Energy with Udan Technology's technological advantages. Strong alliance to jointly create a powerful power battery system. This is also a reference for power battery companies to strengthen their advantages in the BMS field.