Are lithium-ion battery pack balance protection boards good? What is the balancing principle of lithium-ion battery protection boards?
Are lithium-ion battery balance boards good? The balancing principle of lithium-ion battery maintenance boards. Many lithium-ion battery maintenance board manufacturers mention the introduction of a balancing function in their products, highlighting its important role in battery systems. Lithium-ion battery maintenance boards, as a useful way to extend battery life, are gradually attracting our attention. At the same time, the key applications of lithium-ion battery maintenance board balancing systems have also garnered widespread attention.
Regarding multi-series balancing lithium-ion battery systems, there are two traditional methods: passive balancing and automatic balancing. Whether a lithium-ion battery pack maintenance board has a balancing function is controversial. The following are the opinions of lithium-ion battery manufacturers.
1. It is necessary to take a balanced approach: The storage time after the production of lithium-ion batteries is longer because people maintain the static power consumption of the plate and the self-discharge rate of various batteries are different, forming the entire bundle, battery voltage, with a significant voltage difference, but to ensure consistent capacity under the condition of balanced lithium-ion battery pack voltage function, it is possible to achieve the battery capacity of full charge and full discharge, so as to maximize the battery result.
2. Balancing does not work: Many people believe that the balancing function of lithium-ion battery packs works in the middle and later stages. However, in actual use, battery packs experience varying capacity losses in the middle and later stages due to different battery capacities, resulting in a poor capacity. The balancing function through the maintenance board does not compensate for the battery's capacity loss. Therefore, we should understand that the balancing function of lithium-ion battery packs does not compensate for the voltage and capacity loss.
For lithium-ion battery packs in the 13 series, it is recommended not to use the balancing function. However, it is necessary to strictly shut down the battery pack to achieve consistency in battery capacity and internal resistance as much as possible. Lithium-ion batteries are susceptible to damage during storage, but not during use! Lithium-ion batteries are suitable for individual storage, not for overall storage. Battery packs should be tested and delivered to consumers as soon as possible.
When charging lithium-ion batteries in series, it is essential to ensure that each battery is charged in a balanced manner; otherwise, the overall performance and lifespan of the battery will be affected. Commonly used equalization charging techniques include: constant shunt resistor equalization charging, switched shunt resistor equalization charging, average battery voltage equalization charging, switched capacitor equalization charging, buck converter equalization charging, and inductor equalization charging.
During the charging process of lithium-ion batteries, each lithium-ion battery has a balancing circuit. During charging, the balancing circuit of the lithium-ion battery maintenance board controls the voltage of each battery, ensuring that each battery is in the same state and guaranteeing the performance and lifespan of the lithium-ion battery.
Based on the balancing principle of lithium-ion battery maintenance boards, the single-chip lithium-ion battery maintenance unit in the control circuit can be selected according to the voltage level and maintenance delay time of the lithium-ion battery to be maintained. The parallel discharge branch resistor can be achieved using a power resistor or a resistor network.
The maintenance subsystem model of a lithium-ion battery repair board primarily uses logic operation modules, symbolic function modules, one-dimensional lookup table modules, integration modules, delay modules, switching modules, and mathematical operation modules to simulate the timing and logic of maintenance actions. Because the simulation environment differs from the actual circuit, filtering and strong/weak current isolation should not be performed during simulation; otherwise, the remaining modules often result in a longer simulation time.
Based on the balance principle of lithium-ion batteries, after changing the maintenance chip model and number, the power maintenance and charging of lithium-ion battery packs with arbitrary structure and voltage level can be completed in the switching equipment and power component circuits of energy consumption.
Conclusion: Lithium-ion battery maintenance boards function to protect the battery and prevent overcharging. Balancing lithium-ion batteries balances voltage, thereby ensuring full charging of the battery capacity, maximizing its efficiency, and allowing the battery to perform at its best.
