With the rapid development of energy transformation and new energy industry, energy storage system, as an important part of the new power system, is facing unprecedented opportunities for development. As one of the core technologies of energy storage system, battery management system (BMS) is known as the "intelligent housekeeper" of battery pack, and its performance, safety and reliability directly determine the overall performance of energy storage system. 

However, the industry is also facing many challenges in the process of rapid development. On the one hand, the problem of consistency management of battery packs needs to be solved urgently. Because the battery pack is composed of multiple single batteries in series or parallel, the slight differences in the production process of each single battery, such as capacity, internal resistance, self-discharge rate, etc., will lead to imbalance in the charging and discharging process of the battery pack, thus affecting the overall performance and life of the battery pack. On the other hand, with the improvement of battery energy density and the diversification of application scenarios, the requirements for safety control technology of BMS are getting higher and higher, and it is necessary to effectively prevent and control safety problems such as thermal runaway. 

Under such industry background, Qualtech can focus on the field of battery management system, carry out in-depth research and development in active balancing technology, and overall layout. It has successively launched active equalization solutions adapted to multiple application scenarios, covering 16 strings, 52 strings and 104 strings of active equalization products. Qualtech can elaborately build a new generation of active balanced BMS, which has achieved a number of technological breakthroughs and brought new and efficient solutions for battery management. 

01 Efficient Energy Balancing Improves System Performance 

The new generation of active equalization BMS adopts advanced active equalization technology to achieve equalization efficiency ≥ 80%, which is much higher than 0% efficiency of traditional passive equalization. This technological breakthrough means less loss and better overall energy utilization of the battery pack during energy distribution. At the same time, with the efficient energy transfer mechanism, the new product can quickly identify and balance the unbalanced state in the battery pack, significantly shorten the equalization time, and improve the system response speed. This fast equalization capability enables the battery pack to quickly reach the best working state under different working conditions, thereby improving the stability and reliability of the system. Whether in energy storage system to cope with grid fluctuations or in electric vehicle to optimize endurance performance, this efficient energy balancing technology can provide strong support for system performance. 

02 Extend battery life and reduce maintenance costs 

Qualtech's new generation of BMS supports a balanced current of 1 to 3A, which can distribute the energy in the battery pack more quickly and evenly, and further prolong the battery life. This efficient energy distribution reduces the difference between battery cells and reduces the aging rate of batteries caused by imbalance. In addition, the active and passive integrated design makes the system more concise, reduces the complex hardware structure, and improves the equalization effect and the reliability of the whole system. This design not only reduces the failure rate of the system, but also reduces maintenance costs and downtime, and improves the full life cycle benefits of the battery pack. For high-cost application scenarios such as energy storage systems and electric vehicle, this optimization is undoubtedly of great economic value. 

03 High voltage design ensures system safety 

The application scenarios of energy storage system and electric vehicle often involve high voltage environment, which puts forward extremely high requirements for the safety of BMS. Qualtech's new generation of active balancing BMS has the ability to withstand up to 6000V DC, which can withstand extreme working pressure and ensure the safety and stability of the system in high voltage environment. This high voltage design not only reduces the risk of system failure caused by voltage problems, but also guarantees the reliability of energy storage system in high voltage application scenarios. Especially in the fast charging scenario of energy storage power station and electric vehicle, this design can effectively prevent thermal runaway and other security issues, and provide a solid security barrier for the operation of the system. 

04 Meet domestic and foreign certification and expand market application 

Qualtech's new generation of BMS products fully consider the certification requirements of domestic and foreign markets in design, and its ultra-wide body design meets foreign certification standards and export specifications. This makes the product not only competitive in the domestic market, but also can enter the international market smoothly, meet the certification needs of different regions and countries, and further expand the application scope and market space of the product. In the wave of global energy transformation, the demand for energy storage systems and electric vehicle is growing rapidly. Qualtech can pave the way for products to enter the international market by meeting international certification standards, and also provide strong support for the company's business expansion worldwide. 

05 Bidirectional balan optimized energy flow 

Through the bidirectional conversion between the control end power supply and the battery core, the new generation of BMS realizes that the control end power supply charges the battery core, or the battery core outputs electric energy to the control end power supply, and supports the bidirectional flow of charging and discharging. This two-way equalization technology makes the flow of energy inside and outside the battery pack more flexible and efficient, and improves the overall energy utilization and dynamic response ability of the system.

 In the energy storage system, this two-way equalization technology can optimize the energy distribution and improve the charging and discharging efficiency of the system; in the electric vehicle, it can optimize the endurance performance and prolong the battery life. This technological breakthrough not only improves the performance of the system, but also brings higher economic value to users. 

Qualtech's new generation of active balanced BMS has not only achieved many breakthroughs in technology, but also reached a new height in performance, security and market adaptability. It adds a bright stroke to the company's 4S + C full-stack self-developed technology closed-loop, and injects new vitality and competitiveness into the field of battery management system. 

With the continuous expansion of the energy storage system and electric vehicle market, Qualtech's new generation of BMS is expected to shine in these areas and push the industry to a higher level. Through technological innovation and market expansion, Qualtech is injecting continuous impetus into global energy transformation and green low-carbon development.