Wide capacity range battery charging and repairing integrated device

Abstract

The invention provides a wide-capacity-range battery charging and repairing integrated device. The integrated device comprises an integrated module, a storage battery, a DC / DC module and a rectification module, wherein the output of the integrated module is connected with the storage battery to control charging, discharging and repairing of the storage battery, and the integrated module comprisesa first bridge arm, a second bridge arm and a third bridge arm. The three bridge arms are connected to the positive and negative end of the direct-current bus, namely, the PN end; and the first bridgearm and the second bridge arm can be connected in series and output to the storage battery, and the first bridge arm and the second bridge arm can also be connected in parallel and output to the storage battery. According to the invention, the adaptive capacity range of the storage battery is wider, the charging, discharging and repairing functions can be completed, and the storage batteries of different types, different batches, different models and different aging states can be repaired more flexibly, so that the repairing effect is improved; and the amplitude, the frequency, the positive polarity and the negative polarity of the applied pulse current can be randomly controlled, and the flexibility of repair control is improved.

Description

technical field [0001] The invention relates to a circuit device for charging or controlling a battery pack in an electric energy storage system, in particular to an integrated converter and control device for charging and discharging batteries and repairing them. Background technique [0002] In recent years, despite the emergence of various new batteries, lead-acid batteries are still widely used due to their low price, high reliability, and safety. However, due to improper use and maintenance, problems such as plate corrosion and sulfation of the battery will be caused, which greatly shortens the service life of the battery and increases the cost of use. At present, there are many repair methods for this problem. Among them, the characteristics of the battery can be effectively improved and the service life of the battery can be improved by adding an active repair agent and using the pulse repair method. At present, there are many technologies for repairing batteries, bu...

AI Technical Summary

Problems solved by technology

At present, there are many technologies for repairing batteries, but there are problems such as complex control, high cost, and difficulty in decoupling and flexibly controlling the charging and discharging current and high-frequency pulse current.

[0003] Chinese patent CN201510191311.5 discloses a high-frequency resonant lead-acid battery repair device and method. The main circuit of this patent uses a step-down chopper circuit. Since it can only control the charging in the current continuous mode, it cannot be realized by adding high-frequency current pulses. High-frequency resonance; if the current discontinuous mode is used, the charging current cannot be guaranteed

This invention uses switched capacitors to add current pulses. Since the capacitor can be regarded as a voltage source in the transient state, uncontrollable current spikes will be generated when the power supply is switched, so the repair effect will be limited.

[0008] Chinese patent CN108988451A discloses an isolated bidirectional charger control method and control circuit, but the circuit cannot inject large current pulses when controlling the charging and discharging current, and at the same time, the cost is high due to the use of more power devices

[0009] In summary, the existing technology mainly has relatively simple control in terms of battery charging and repairing the converter, and it is impossible to truly decouple the charging and discharging current and pulse injection, and independently and accurately control

At the same time, due to the parameter setting of the converter in the prior art, the capacity range of the battery to be adapted is small, and the application is limited

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