Split BMS Power Management System Integrating Advantages Of Lead-acid Battery And Lithium Battery

Under the trend of global green economy development and low carbon emission reduction, large-scale electrification wave has been set off around the world. In 2022, the sales volume of new energy vehicles is expected to reach 5.5 million, with a year-on-year growth of more than 56%. The sales volume of new energy vehicles is expected to continue to rise. As the main power source of new energy vehicles, lithium batteries will greatly affect the development of the new energy industry. It is predicted that the global lithium battery market will reach 694.565 billion yuan in 2025, with a shipment volume of 439.32GWH, indicating the huge market scale.

Before lithium batteries came into the public's view, the high safety and cheap price of lead-acid batteries made them popular in many application fields. The lightweight and portable characteristics of lithium batteries made them occupy the small battery markets such as mobile phone batteries and notebook computer batteries. Lithium battery and lead-acid battery will compete in the electric bicycle market and electric vehicle market in the future. There is an enterprise that combines the advantages of lead-acid battery and lithium battery to form a complement and formally enters the electric bicycle industry.

QINGYUAN YIYUAN POWER SUPPLY CO., LTD., a high-tech green energy enterprise, is the first enterprise in the industry to propose the use of lithium battery split technology to comprehensively replace lead-acid batteries. It is mainly engaged in the BMS power management system for lithium ion power.

In the era of sustainable development, QINGYUAN YIYUAN POWER SUPPLY CO.

Lead acid battery has the disadvantages of serious environmental pollution, excessive weight, short life, etc., while lithium battery is superior to lead acid battery in terms of weight, environmental protection, energy density, etc., but the current BMS technology of lithium battery is difficult to make lithium battery as universal as lead acid battery. After comparing the advantages and disadvantages of lead acid battery and lithium battery, Xiaju New Energy Technology has successfully developed a separate BMS power management system and thermal management system, Complement the advantages of the two to effectively solve the problem of lithium battery safety and large-scale promotion.

The split lithium battery can be used in more than 90% of electric bicycles, and the battery can be circulated and sold separately in the market. This can not only solve the problem of high R&D costs for new products of vehicle manufacturers, but also solve the after-sales problem of lithium battery for vehicles.

The biggest advantage of the split type is that it can quickly occupy the market, obtain huge market capacity, and occupy a place in the market competition.

The split BMS power management system, which uses ternary and lithium iron phosphate and other environmental protection materials, has the characteristics of environmental protection, non pollution, strong adaptability, high recovery value, fast after-sales efficiency, low price, etc. It is consistent with the use of lead-acid batteries, and can be spliced with a variety of structural forms. At the same time, the thermal runaway safety warning system is integrated inside the battery, which can effectively solve the safety accidents caused by fire and explosion when the battery is used.

From the technical perspective, the split BMS power management system is supported by four major parts: the equalization system, the thermal management system, the data center, and the FreeRTOS operating system. The equalization system adopts the resistance consumption method and energy transfer method. By solving the problems of heat dissipation of the balanced resistance and energy transfer of the single body, the battery life cycle can be extended and the energy can be maximized.

The thermal management system is the first in the industry. It can heat the battery at low temperature. The working efficiency of the battery at minus 30 ℃ is ≥ 80%. It can prevent the battery from burning out of control at high temperature. The built-in temperature balance system can keep the temperature difference within ± 3 ℃; The data center collects the battery information to the server. In case of any potential safety hazard, the data center will send an early warning to the customer in time to prevent it. At the same time, the data center has a fast product replacement capability, and supports OTA air download technology, which can timely and remotely repair the shipped BMS program problems; The FreeRTOS operating system uses multiple algorithm libraries to expand more advanced BMS algorithms.