The powerful lithium-ion battery management system can effectively monitor, protect, balance, and alarm the lithium-ion battery pack, thereby improving the working efficiency and service life of the entire power lithium-ion battery pack. Lithium-ion batteries are widely used in various precision equipment due to their high operating voltage, small size, ľahký, high energy density, no memory effect, no pollution, small self-discharge, and long cycle life. However, lithium-ion batteries have serious defects. In summary, there are two aspects:

(1) Security

Lithium-ion batteries have poor safety, and sometimes have defects such as explosions. In particular, the lithium-ion battery with lithium cobalt oxide as the positive electrode material cannot be discharged at a large current and has poor safety. In addition, almost all kinds of lithium-ion batteries are overcharged or over-discharged, which can cause irreversible damage to the cells. Lithium-ion batteries are also extremely sensitive to temperature: if the temperature is too high, the electrolyte may decompose, burn or even explode; if the temperature is too low, the performance of the lithium-ion battery will deteriorate significantly, affecting the normal use of the equipment.

Due to the limitations of the battery manufacturing process, there will be differences in the internal resistance and capacity of each battery cell. When multiple battery cells are used in series, the charging and discharging rates of each battery cell will be inconsistent, which leads to a low utilization rate of the battery capacity. In view of this, lithium-ion batteries usually require a special protection system to monitor the health of the battery during actual use, so as to manage the use of lithium-ion batteries.

(2) Maintainability

The capacity fading and the inability to accurately predict the capacity of lithium-ion batteries at low temperatures make the equipment less maintainable. For long-term online meters, the battery needs to be replaced regularly, while the remote monitoring equipment work sites are scattered, and the distances between each site are long, so the battery replacement is a huge workload and high cost.

In order to reduce the maintenance workload and maintenance cost, the lithium-ion battery BMS management system must have an accurate charge state estimation function to accurately grasp the charge state of the battery and carry out battery replacement work more purposefully; at the same time, the battery management system must have Lower self-consumption to reduce maintenance frequency and prolong battery life. Preto, for the long-term continuous power supply remote monitoring instrument, the rational design of the lithium-ion battery BMS management system is of great significance to the maintenance of the equipment.