1. Lossy equilibrium is the earliest equilibrium, which is relatively easy to realize. When in use, it is connected in parallel at both ends of the battery to be balanced. When the battery voltage rises to a certain set value due to charging, the switch tube is turned on, so that the discharge resistor is turned on, and excess electric energy is lost in the form of heat energy, which is not conducive to energy saving and environmental protection, and is only suitable for charging balance.
2. Lossless equalization is a kind of battery equalization that has developed rapidly in recent years. The main principle is to send part of the electricity from the high-voltage battery back to the battery circuit or directly to the low-voltage battery through the conversion device. The energy storage elements used are mainly capacitors or inductors, and the basic balance of battery voltage in the battery pack is realized through repeated charging and discharging of capacitors or inductors.
Two national patent applications, with patent application numbers of 20112055582.1and 20 1220 153997.0 respectively. This technology uses general electronic components, and does not use special devices such as single chip microcomputer and MCU. The circuit is simple and efficient, which realizes power transfer between batteries and has high conversion efficiency. The power consumption of each equalizer is extremely low, only mA, or even lower. There are only three connecting wires, which are very convenient to install, use and maintain. When the number of series batteries reaches two or more, it can be used, especially for large-capacity power batteries and supercapacitors.
At present, the prototype of this technical test has realized the power balance of nickel-hydrogen battery, nickel-cadmium battery and various lithium-ion batteries, and the number of balanced batteries is unlimited. The same applies to supercapacitors.