Energy storage DC/DC conversion module, controller thereof and energy storage power conversion system

Abstract

The invention provides an energy storage DC / DC conversion module, a controller thereof and an energy storage power conversion system. The controller comprises a BMS control unit and a DC / DC control unit. wherein a battery pack connected to the outer side of the first side interface of the energy storage DC / DC conversion module is controlled by the BMS control unit; a power conversion unit in the energy storage DC / DC conversion module is controlled by the DC / DC control unit; the BMS control unit is in communication connection with the DC / DC control unit; the power supply of the BMS control unitand the power supply of the DC / DC control unit are mutually independent; in other words, the BMS control unit originally arranged in the battery pack is moved into the energy storage DC / DC conversionmodule, so that the BMS control unit and a switch cabinet in the battery pack can be omitted, the size and cost of the battery pack are reduced, and the size and cost of a system where the energy storage DC / DC conversion module is located are reduced.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and more specifically relates to an energy storage DC / DC conversion module, a controller thereof, and an energy storage power conversion system. Background technique [0002] In the existing technology, such as figure 1 As shown, the battery system and the DC / DC module are independently matched to complete the power conversion of the energy storage system; the battery system includes multiple battery units ( figure 1 1 battery unit is used as an example for demonstration), the battery unit includes a battery pack, a switchgear and a BMS control unit, the BMS control unit communicates with the battery pack, and the switchgear is controlled by the BMS control unit, that is, the The BMS control unit receives the state parameters of the battery pack, and controls the on-off state of the switchgear according to the state parameters of the battery, and then controls whether the DC / DC module ...

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, such as figure 1 As shown, the battery system and the DC / DC module are independently matched to complete the power conversion of the energy storage system; the battery system includes multiple battery units ( figure 1 1 battery unit is used as an example for demonstration), the battery unit includes a battery pack, a switchgear and a BMS control unit, the BMS control unit communicates with the battery pack, and the switchgear is controlled by the BMS control unit, that is, the The BMS control unit receives the state parameters of the battery pack, and controls the on-off state of the switchgear according to the state parameters of the battery, and then controls whether the DC / DC module is powered on. As a result, the internal components of the battery unit are relatively complicated and its volume is large, resulting in The battery system is large in size and high in cost, and the system composed of the battery system and DC / DC modules is large in size and high in cost

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