In recent years, with the continuous and rapid development of the economy, the basic industries such as electricity, communication and computer have developed very rapidly. These industries are in a period of high growth, and the demand for batteries is increasing day by day. The following we for everyone to explain the battery balancer technology research!
One of the most important problems in the use of series battery pack is that the cycle life is shorter than the design life. In addition to the physical properties of batteries and incorrect charging and discharging operations, the inconsistency of charging and discharging characteristics of individual batteries is the most important factor affecting battery life. The inconsistency of a single battery will cause the battery power imbalance between charging and discharging, which will damage the over-charged or over-discharged battery and affect the entire battery pack. In order to prolong the service life of the battery, the difference of battery state needs to be kept in a small range. Therefore, based on the existing battery health management technology, we carried out the research of battery equalization technology.
To realize the equal charging of each single battery of the series battery set, which is mainly divided into active and passive equalization technology. However, most products with balanced functions need to be completed in the charging and discharging process of batteries in principle design. However, for standby batteries, 99% of the time is in the floating charging state, both in terms of design and practical use, and the frequency of charging and discharging operations is very low.
If the equalization circuit of the backup battery is designed according to the equalization principle of the charging and discharging process, the corresponding equalization products will be wasted by a lot of idle, and the equalization effect of the backup battery is not guaranteed. Frequent battery charging and discharging in order to maintain a good online balance will damage batteries and increase O&M costs. Therefore, from the design principle, the equalization operation process should be carried out in the floating charging state.
Although the constant voltage charging process of the floating charging state of the battery has a certain equalization effect on the battery, the floating charging voltage setting is not too high to avoid electrolyte water loss and other reasons, so the equalization ability is very limited.
When researching equalization technology in our company, we take into account the operation and maintenance cost of users and battery usage habits. We have developed an active equalization system with many years of dedication. It solves the problem of charging and discharging balance of battery packs such as electric forklifts, electric vehicles and electric tractors, and effectively extends the battery range and service life of battery packs.
Battery equalizer, also known as battery balancer, is a kind of electronic protection equipment to prevent the service life of the battery from being reduced due to the voltage imbalance between the cells inside the battery. When the voltage between battery cells is out of balance, different battery cells have different charging and discharging speeds. When one battery cell is charged, the other battery cells are in the state of overcharging or undercharging. Overcharging or undercharging will damage the battery, reducing the battery capacity and shortening the battery life. The battery equalizer can balance the power of each battery grid in real time, thus extending the service life of the battery by 5-30%.