Full-cycle control system for supporting arbitrary parallel connection of different types of charging-discharging devices and control method thereof

Abstract

The invention discloses a full-cycle control system for supporting arbitrary parallel connection of different types of charging-discharging devices and a control method thereof. The system comprises two or more than two parallel-connected charging / discharging device sets and a main control module, wherein the charging / discharging device sets are connected in parallel with a direct current bus via a positive-negative port for charging or discharging; each charging / discharging device set comprises a charging / discharging device, a charging control module, a discharging control module, a current / current detection module and a set control module; the charging / discharging device, the charging control module and the discharging control module are connected in series onto a loop; and the current / voltage detection module is used for detecting the current of the loop or the voltage of a detection bus. By the full-cycle control system, the problem of mutual charging and discharging caused by mutual parallel connection of a plurality of charging-discharging device sets with different types of voltage classes is solved, the full-cycle process of charging and discharging of each charging-discharging module set is achieved.

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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