Automatic equalization regulating method and apparatus for series accumulator battery

Abstract

The invention provides an automatically balancing and adjusting method for charging and discharging series storage battery and a device thereof. The device is formed by a DC / DC inverter, wherein, an input end of the DC / DC inverter is connected with a positive end and a negative end of the storage battery, while N groups of completely same current output ends are respectively connected with positive electrodes and negative electrodes of corresponding N batteries; as long as a high-frequency pulse generator is started to work, the inverter can directly distribute electric quantity according to voltage of each battery to transfer electric quantity from a high-capacity battery to a low-capacity battery, so that voltage and electric capacity of each battery tends to be the same to realize balance. The automatically balancing and adjusting method can avoid the phenomena of over charge and over discharge of the storage battery during the process of charging and discharging, thereby protecting the storage battery, and prolonging the service life of the storage battery.

Description

technical field [0001] The invention relates to a method and device for automatically balancing and adjusting the voltage and power of each battery during the charging and discharging process of a series storage battery group, which is suitable for various types of storage batteries and supercapacitors. Background technique [0002] During the use of series battery packs, there will inevitably be differences in capacity and performance among the batteries. When charging, the batteries with small capacity and poor performance will be overcharged, and when discharging, the batteries with small capacity and poor performance will be overcharged. overdischarge phenomenon. Constant repeated overcharge and overdischarge will make the capacity of the poor battery smaller and smaller, and the performance will be worse and worse. This vicious cycle process accelerates the damage of the poor battery. However, the available capacity of the series battery pack is determined by the capac...

AI Technical Summary

Problems solved by technology

In the design of the control software, the characteristic values ​​such as the upper and lower limits of the battery voltage should be set as the start and end conditions of the balance control, that is to say, there is no control dead zone in the balance control

In addition, various physical quantities are affected by temperature, working conditions, etc., and some need to add compensation measures, which increase the workload of system hardware and software, and increase the difficulty of achieving the expected equilibrium effect.

[0005] To sum up, in the existing technology, the system is relatively complex, the cost is high, and the reliability is also greatly affected. Therefore, for battery packs with low value, especially for electric vehicles, the working conditions vary greatly and the reliability requirements are high. , there are great difficulties in the practical promotion of the above-mentioned equalization device

At present, there are dozens of related patent technologies in China, but looking at the market, except for a few cases, there is no corresponding product accepted by users, especially in urgently needed fields such as electric bicycles and electric transport vehicles, and no mature balance has been found. device products, resulting in short battery life has become a major problem in the industry

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