CN219394704U

CN219394704U - ACDC two-in-one power supply

Info

Publication number: CN219394704U
Application number: CN202122488458.4U
Authority: CN
Inventors: 张家书; 冯鹏辉; 焦朋朋; 黄昆; 焦轶冰; 张伟强
Original assignee: Luoyang Grasen Power Technology Co ltd
Current assignee: Luoyang Grasen Power Technology Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2023-07-21
Anticipated expiration: 2031-10-15

Abstract

The utility model provides an ACDC two-in-one power supply, which is characterized in that a first EMI circuit, a full-bridge rectifying circuit, a PFC Boost module and a DC/DC isolation conversion module are sequentially connected in series to form a power grid Boost circuit, a second EMI circuit, a Boost module and the DC/DC isolation conversion module are sequentially connected to form a battery Boost circuit, the second EMI circuit is externally connected with a high-voltage battery, the output ends of the PFC Boost module and the Boost module are connected in parallel and then are connected with the DC/DC isolation conversion module, and the output end of the DC/DC isolation conversion module supplies power for a control system BMS. In the utility model, the Boost module boosts the voltage of the high-voltage battery to a certain voltage, the PFC Boost module boosts the voltage of the power grid to a certain voltage, the two outputs are connected in parallel, and the two outputs are used for the control system BMS through the isolation DC/DC output module.

Description

ACDC two-in-one power supply

Technical Field

The utility model relates to the field of power supplies, in particular to an ACDC two-in-one power supply.

Background

The energy storage system requires its auxiliary power supply:

in order to prevent serious faults of a system caused by sudden power failure of a control system BMS when a power grid suddenly fails, an auxiliary power supply of an energy storage system still can work normally when the power grid fails, namely the auxiliary power supply simultaneously takes power from the power grid and takes power from a high-voltage battery, and the auxiliary power supply is isolated and converted into low-voltage output;

in order to save energy, the auxiliary power supply is required to take power from the power grid preferentially, and when the power grid is powered down, the power grid is immediately converted into a high-voltage battery to take power.

As shown in fig. 2, in the conventional method, an isolated AC/DC module and an isolated DC/DC module are used, the AC/DC module takes power from a power grid, the DC/DC module takes power from a high-voltage battery, the two modules output power through a PSD (competitive power supply module) and then supply power to an energy storage control system, the output voltage of the AC/DC module is slightly higher than the output voltage of the DC/DC module in design, the PSD is guaranteed to preferentially select the ACDC module for power supply, the power grid is powered down, and the power is immediately switched to the DC/DC module for power supply.

In the traditional topology implementation architecture, the auxiliary power supply of the energy storage system has large volume, complex structure and high cost.

Disclosure of Invention

The utility model provides an ACDC two-in-one power supply for solving the problems in the prior art.

The technical scheme of the utility model is realized as follows:

an ACDC two-in-one power supply comprising:

the system comprises a first EMI circuit, a second EMI circuit, a full-bridge rectification circuit, a PFC Boost module, a Boost module, a DC/DC isolation conversion module, an auxiliary power supply, a first MCU micro-control unit and a second MCU micro-control unit;

the first EMI circuit, the full-bridge rectifying circuit, the PFC boost module and the DC/DC isolation conversion module are sequentially connected in series to form a power grid boost circuit, and the EMI circuit is externally connected with a power grid;

the second EMI circuit, the Boost module and the DC/DC isolation conversion module are sequentially connected to form a battery Boost circuit, and the second EMI circuit is externally connected with a high-voltage battery;

the output ends of the PFC Boost module and the Boost module are connected in parallel and then connected with the DC/DC isolation conversion module, and the output end of the DC/DC isolation conversion module supplies power for the control system BMS;

the auxiliary power supply can provide auxiliary power, the first MCU micro-control unit is responsible for primary side sampling and control, the second MCU micro-control unit is responsible for secondary side sampling and control, and the first MCU micro-control unit and the second MCU micro-control unit adopt isolation communication.

Preferably, an anti-reflection diode is further arranged between the second EMI circuit and the Boost module.

The beneficial effects are that: according to the utility model, a non-isolated Boost module and a non-isolated PFC Boost module are used, the Boost module boosts the voltage of the high-voltage battery to a certain voltage, the PFC Boost module boosts the voltage of the power grid to a certain voltage, the two outputs are connected in parallel, and the isolated DC/DC output module is used for a control system BMS.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the present utility model;

fig. 2 is a structural diagram of a conventional architecture.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-2, an ACDC two-in-one power supply includes:

the PFC Boost module and the Boost module are connected in parallel at the output end, and PFC Boost is higher than Boost, so that the power supply of the power grid is realized, the power grid is preferentially consumed, the power grid is powered down, and the power supply is immediately switched to the function of supplying power to the high-voltage battery.

The anti-reverse diode is connected in series with the positive line and the negative line of the direct current input, can be used as reverse connection protection of the direct current input, and can also prevent the direct current negative line, the battery negative line and other equipment of the power grid, which are passed through by the non-isolation circuit in the auxiliary power supply, from forming circulation.

The output ends of the PFC Boost module and the Boost module are connected in parallel and then connected with the DC/DC isolation conversion module, and the output end of the DC/DC isolation conversion module supplies power for the control system BMS.

And an anti-reflection circuit is arranged between the second EMI circuit and the Boost module.

Compared with the original power supply structure (such as fig. 2), the power supply structure (such as fig. 1) has the following advantages:

1. only one isolation DC/DC module is used, so that the cost can be saved by at least 30%;

2. in the original topological structure, an auxiliary power supply is required to be designed in the isolated AC/DC module, and an auxiliary power supply is required to be designed in the isolated DC/DC module, and only one auxiliary power supply is required in the power supply, so that the design is simplified, and the cost is saved by about 10%;

3. the non-isolated Boost module and the non-isolated PFC Boost module are output in parallel, namely the two module Boost capacitors can be shared, namely compared with the old topological structure, the Boost capacitor of the Boost part in the DC/DC isolated module is omitted, and the cost is saved by 5%;

4. the power supply uses an internal MCU micro control unit for working state monitoring, so that the special PSD competition power supply module at the rear end of the original topological structure is omitted, and the cost is reduced by about 10%;

5. the complexity of the whole power supply system is reduced, the original energy storage system needs to purchase three parts, only one part is needed to be assembled in the assembly and cabinet body, the number of internal connecting lines of the system is greatly reduced, and the whole volume of the new topology power supply is reduced by more than 1/2 compared with that of the old topology power supply.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. An ACDC two-in-one power supply, comprising:

2. The ACDC two-in-one power supply of claim 1 wherein: and an anti-reflection diode is further arranged between the second EMI circuit and the Boost module.