Balanced judgment and supplementary device of energy transfer type battery pack and method thereof

Abstract

The invention relates to a balanced judgment and supplementary device of an energy transfer type battery pack and a method thereof, which are mainly used on occasions when numerous batteries are connected in series for use in industry. The device comprises balancing modules and a measurement and control module, wherein the balancing modules are connected in turns, are connected with each single battery, and charge the single battery by using the energy of the battery pack or the energy of an external power supply; the measurement and control module is connected with the battery pack and each single battery therein, and measures and compares the single battery. The method comprises the following steps of: measuring and controlling the total voltage of battery packs connected in series and the voltage of each single battery; calculating the average voltage of the batteries of the battery packs connected in series; sending starting / stopping signals; and making the voltage of the single battery approach to the average voltage of the battery packs. The device and the method have the advantages of having the function of ensuring the voltage balancing, which is performed in a mode of energy transfer, of the single batteries of the battery packs connected in series in use, having small losses, and being favorable to be applied to middle or large-capacity battery packs.

Description

technical field [0001] The invention relates to an energy transfer type battery group equalization judging and replenishing device and method thereof, belonging to the technical field of batteries. Background technique [0002] For important power supply equipment in industrial applications, a set of batteries is required as a backup power supply, and the voltage of a single battery is not high, so it cannot be used directly. Generally, dozens or even hundreds of batteries are connected in series to increase the total voltage for use. Due to the inevitable performance inconsistency in the process of battery manufacture and use, when charging and discharging a battery pack in series, using a certain method to balance the voltage of each single battery will improve the use of the battery and prolong the service life of the battery. At present, there are some methods for balancing the charge and discharge of series-connected battery packs, most of which use the method of resist...

AI Technical Summary

Problems solved by technology

[0003] An object of the present invention is to solve the technical problem existing in the prior art that charging and discharging series-connected battery packs is not conducive to equalization under the condition of charging and discharging large-capacity series-connected battery packs; a constant current control mode is provided, which can It can be used together with the original charging and discharging equipment of the series battery pack without affecting each other. It has the function of ensuring the voltage balance of the single cells in the series battery pack during use, and the balance is carried out by means of energy transfer, with small loss, which is conducive to application in medium An energy-transfer type battery pack balance judgment and supplementary device for large-capacity battery packs

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