A full-cycle control system supporting arbitrary parallel connection of different types of chargeable and discharging devices and its control method

Abstract

The invention discloses a full-cycle control system and a control method that supports arbitrary parallel connection of different types of chargeable and dischargeable devices. The system includes two or more parallelly connected charging and discharging device modules and a main control module. The group is charged or discharged in parallel with the DC bus through the positive and negative interfaces; the charging and discharging device module includes a charging and discharging device, a charging control module, a discharging control module, a current / voltage detection module and a module control module. The discharge device, the charge control module and the discharge control module are connected in series on the loop, and the current / voltage detection module is used to detect the current of the loop or the voltage of the bus. The invention solves the problem that multiple charging and discharging device modules of different voltage levels are connected in parallel to each other and cause mutual charging and discharging, and each charging and discharging device module realizes a full cycle process of charging and discharging.

Description

technical field [0001] The invention relates to a full-cycle control system and a control method thereof that support arbitrary parallel connection of different types of rechargeable and dischargeable devices. Background technique [0002] With the vigorous development of electronic technology, the use of medium and large battery packs is increasing. During the production, testing and use of these battery packs, many charging and discharging processes are used. [0003] The existing charging equipment or discharging equipment has the following disadvantages: [0004] 1. The battery packs need to use the same type of battery modules for parallel use, that is, the parallel battery packs require the same voltage for each battery, and it is not possible to parallel input and output battery modules of completely different types and voltage levels. Because in the battery pack, the difference between the monomers always exists. Take the capacity as an example, the difference will...

AI Technical Summary

Problems solved by technology

The same current flows through the battery pack. Relatively speaking, the battery pack with a large capacity is always in a small current, shallow charge and shallow discharge, tending to slow capacity decay and prolong life, while the battery pack with a small capacity is always in a high current overcharge and over discharge, tending to capacity. The attenuation is accelerated, the life is shortened, the difference in performance parameters between the two is getting bigger and bigger, forming a positive feedback characteristic, small capacity fails early, and the life of the group is shortened

[0005] 2. The charging and discharging steps of the battery pack cannot achieve the full cycle function, which makes the use of the battery pack troublesome

[0006] 3. The battery pack cannot be connected in parallel to increase capacity at will. When connecting in parallel, it is necessary to consider whether the batteries connected in parallel are of the same type and at the same voltage. It cannot be directly connected in parallel at any time, any type of battery, and any voltage battery.

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