Control system having protection function and supporting adding of different types of chargeable and dischargeable devices and method thereof

Abstract

The invention discloses a control system having a protection function and supporting adding of different types of chargeable and dischargeable devices and a control method thereof. The system comprises two or more parallel-connected charge and discharge device module groups and one master control module. The charge and discharge device module groups are connected in parallel with a DC bus via positive and negative interfaces to perform charging or discharging. Each charge and discharge device module group comprises a charge and discharge device, a charge control module, a discharge control module, a current / voltage detection module, a protection device and a module group control module. The charge and discharge device, the charge control module, the discharge control module and the protection device are connected in series in the loop. The current / voltage detection module is used for detecting current of the loop or detecting voltage of the bus. A problem of mutual charge and discharge caused by mutual parallel connection of multiple different types of voltage levels of charge and discharge device module groups can be solved, and each charge and discharge device module group can realize the complete cycle process of charge and discharge.

Description

technical field [0001] The invention relates to a control system and a control method that supports the addition of different types of rechargeable and discharge devices with protection functions. 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 never disapp...

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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