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To buy battery equalizer, choose Shenzhen HUAXIAO Technology Co.,Ltd.

(Summary description)The abbreviation of battery equalizer "BE" is used to maintain the charge and discharge balance between each battery in the battery pack connected in series. During the working process of the battery connected in series, due to the difference in the chemical composition and temperature of the battery cells, it will cause two The charge and discharge of each battery will vary. So a battery equalizer is needed.

To buy battery equalizer, choose Shenzhen HUAXIAO Technology Co.,Ltd.

(Summary description)The abbreviation of battery equalizer "BE" is used to maintain the charge and discharge balance between each battery in the battery pack connected in series. During the working process of the battery connected in series, due to the difference in the chemical composition and temperature of the battery cells, it will cause two The charge and discharge of each battery will vary. So a battery equalizer is needed.

Information

The abbreviation of battery equalizer "BE" is used to maintain the charge and discharge balance between each battery in the battery pack connected in series. During the working process of the battery connected in series, due to the difference in the chemical composition and temperature of the battery cells, it will cause two The charge and discharge of each battery will vary. So a battery equalizer is needed.

battery equalizer

In order to meet the energy and voltage requirements of lithium-ion batteries, hundreds or even thousands of single cells need to be combined into battery packs in series and parallel. In theory, these single cells should have exactly the same characteristics. However, in fact, due to the fluctuation of related process parameters in the manufacturing and production processes, even the same batch of lithium-ion batteries still have certain differences in performance. Although we will screen and match before grouping, we still cannot guarantee 100% Therefore, these differences will continue to accumulate with the increase in the number of cycles after the group is formed, resulting in the continuous expansion of the performance difference between the single batteries. At the same time, due to the huge number of batteries in the battery pack, the difference will continue to accumulate during the use process. There must be a certain temperature gradient inside the middle battery pack. The existence of the temperature gradient will also cause the inconsistency of the internal resistance of the battery and the inconsistency of the current distribution, which will lead to the inconsistent decline of the single battery. These factors will lead to the cycle of the battery pack. The performance is much lower than the cycle life of a single battery.

The inconsistency between single lithium-ion batteries mainly includes indicators such as temperature, voltage, SoC, capacity and internal resistance. If we take the time factor into account, the inconsistency of lithium-ion batteries should also include self-discharge, coulomb efficiency, The rate of capacity decline, etc.,

The balancing strategy of lithium-ion batteries can be divided into two categories: 1) dissipative battery equalizer; 2) non-dissipative battery equalizer. The main difference between the two is where the energy of the battery goes during the equalization process. The dissipative equalization restores the balance between the single cells by directly discharging all the batteries to a certain fixed voltage value. The advantage is that the structure is simple, but the energy There is more waste, and there is also the problem of heat production. The non-dissipative balance transfers the power of the higher voltage single battery to the lower voltage battery to achieve the balance between the single batteries. The advantage is that there is less energy waste, but the disadvantage is that the structure is more complicated and the cost is higher. 

The lithium battery equalizer has been launched. This product is proposed to meet the maintenance and repair needs of battery boxes, battery modules and single cells. The lithium battery equalizer is designed to solve the problem of different power lithium batteries in series and groups. Developed for the problem of shortening the cycle life of the battery pack due to the expansion of the balance; it is a professional choice for power battery testing and maintenance.

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