Self-excitation negative pulse voltage regulation equalization battery

Abstract

The invention discloses a self-excitation underswing voltage stabilizing battery which is serially connection and used for the storage battery or the monomers of the storage battery unit. The battery inside is embedded or externally provided with a control module which can generate underswing by self-excitation, so as to achieve the aim of eliminating the concentration polarization and ohmic polarization produced at the charging telophase of the battery, improving the charging receiving ability and automatically balancing the end voltage of the monomers in the battery and thus realize balance and consistence. The invention is generally used for the storage battery field needing a plurality of serially connected monomers and requiring consistence such as the valve controlled lead-acid accumulator, the nickel hydrogen battery, the lithium ion cell, the double-energy power battery, the fork battery and the small valve controlled lead-acid accumulator of the lead-acid accumulator and the UPS of the electric vehicles such as the assistant bicycle, the electric motorcycle and the electric car.

Description

Technical field [0001] The present invention relates to a battery pack or each monomer in a battery unit used in series, which is commonly used in lead-acid batteries for electric vehicles such as assisted bicycles, electric motorcycles, and electric cars, valve-regulated lead-acid batteries for UPS, and nickel-hydrogen batteries , Lithium-ion batteries, dual-energy power batteries, forklift batteries, small valve-regulated lead-acid batteries, and other storage batteries that require multiple cells to be used in series and require consistency. Background technique [0002] The battery pack is composed of multiple battery cells. The charging control generally only controls the current and voltage of the entire battery pack. Due to the objective differences between the battery cells, no matter how the battery is configured for capacity and voltage before leaving the factory, it has been repeatedly After charging and discharging cycles, there will always be differences in the capac...

AI Technical Summary

Problems solved by technology

There are also obvious deficiencies: 1. Regardless of whether the battery pack is at the end of charging or at the end of discharge, as long as there is a difference in the voltage between the battery cells, the circuit will move the charge back and forth. Practice has proved that even if the energy conversion rate of the resonant circuit can be as high as 90 %, which also causes a lot of waste of electricity, and finally manifests as a great drop in the actual capacity of the battery pack

2. The structure of the resonant circuit is relatively complex, the cost is high, and it has no practical application value in many fields. For example, a set of commonly used 36V electric moped batteries has a total of 18 monomers, which requires 17 sets of resonant circuits, and the cost of the resonant circuit is the lowest. Also more than 2 times the value of the battery itself

[0005] CN1667909A discloses a circuit, the general principle is similar to CN1275829A, but the resonant circuit is removed and replaced by a bypass resistor, which indeed reduces the cost, but there are also obvious deficiencies: 1. If the difference between the cells of the battery pack is relatively large, Using resistors to bypass heat is quite serious, and heat dissipation has become a new problem in practical applications; 2. The high voltage of the battery charging process does not necessarily mean that the capacity is large, but the internal resistance of the battery may be relatively large. If the voltage is high, it will be discharged. It is bound to cause the unit with small capacity to be not easy to fill up

However, after all, the charger works on the whole set of batteries at the same time, but it cannot solve the problem of imbalance between batteries, and the phenomenon of hydrogen evolution in high-voltage cells still exists.

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