A grid-connected and off-grid energy storage integrated system auxiliary power supply circuit

Abstract

The utility model relates to new energy energy storage technical field discloses a kind of off-grid energy storage integrated system auxiliary power supply power supply circuit, including battery cluster, PCS module, uninterrupted voltage source, AC-DC compatible input switching power supply;One end of high-voltage control box is connected with the input end of uninterrupted voltage source through PCS module;The input end of uninterrupted voltage source is simultaneously connected with grid mains;Uninterrupted voltage source converts alternating current into direct current output, to be used for the auxiliary power supply of control cabinet and battery system;The other end of high-voltage control box is connected with the input end of AC-DC compatible input switching power supply, and the input end of AC-DC compatible input switching power supply is also connected with grid mains and the alternating current output of PCS module;AC-DC compatible input switching power supply converts input alternating current and direct current into direct current output, to be used for the auxiliary power supply of control cabinet and battery system.The utility model improves the reliability of off-grid energy storage integrated system auxiliary power supply power supply.

Description

Technical Field

[0001] This utility model relates to the field of new energy storage technology, and in particular to an auxiliary power supply circuit for an integrated on-grid and off-grid energy storage system. Background Technology

[0002] An integrated grid-connected and off-grid energy storage system refers to a system that converts other forms of energy into electrical energy and stores it through various media, releasing it when needed. The integrated system is comprised of devices consisting of conversion elements, energy storage elements, and grid connection devices composed of power electronic components. Other forms of energy are converted into electrical energy through conversion devices. The energy storage devices primarily achieve energy storage, release, or rapid power exchange. The grid connection devices enable bidirectional energy transfer and conversion between the energy storage devices and the grid, achieving functions such as peak shaving, energy optimization, improved power supply reliability, and power system stability. For the auxiliary power supply of an integrated grid-connected and off-grid energy storage system, reliable power supply relies on the mains power or other conversion methods. To ensure stable system operation, the auxiliary power supply method and approach of the entire system are particularly important during operation. Utility Model Content

[0003] In view of this, in order to solve the technical problems existing in the prior art, the present invention provides an auxiliary power supply circuit for an integrated grid-connected and off-grid energy storage system.

[0004] This utility model provides an auxiliary power supply circuit for an integrated on-grid and off-grid energy storage system, comprising a battery cluster, a PCS module, an uninterruptible voltage source (UPS), and an AC / DC compatible input switching power supply. The battery cluster includes a high-voltage control box and a series-connected battery box. The high-voltage control box is connected to the series-connected battery box. One end of the high-voltage control box is connected to the input terminal of the UPS via the PCS module. The input terminal of the UPS is simultaneously connected to the mains power grid. The UPS converts AC power to DC power for auxiliary power supply to the control cabinet and battery system. The input terminal of the AC / DC compatible input switching power supply is connected to the other end of the high-voltage control box, and the input terminal of the AC / DC compatible input switching power supply is also connected to the mains power grid and the AC power output from the PCS module. The AC / DC compatible input switching power supply converts the input AC and DC power to DC power for auxiliary power supply to the control cabinet and battery system.

[0005] Furthermore, when the mains power fails and / or the uninterruptible voltage source is depleted, the AC / DC compatible input switching power supply is powered through the battery cluster to provide auxiliary power to the control cabinet and battery system.

[0006] Furthermore, it also includes a DC-DC module; one end of the high-voltage control box is connected to the PCS module through the DC-DC module; the DC-DC module is used to convert the DC power output from the high-voltage control box and output the converted DC power to the PCS module.

[0007] Furthermore, it also includes a first fuse; the first fuse is disposed between the positive output port of the high-voltage control box and the positive input port of the AC / DC compatible input switching power supply.

[0008] Furthermore, it also includes a second fuse; the second fuse is located between the output of the PCS module and the live wire input port of the AC / DC compatible input switching power supply.

[0009] Furthermore, it also includes a first anti-reverse diode, the anode of which is connected to the positive output port of the uninterruptible voltage source, and the cathode is used to output DC power.

[0010] Furthermore, it also includes a first switch and a second switch; when the cathode of the first anti-reverse diode is connected to the first switch, the uninterruptible voltage source is used to provide auxiliary power to the control cabinet; when the cathode of the first anti-reverse diode is connected to the second switch, the uninterruptible voltage source is used to provide auxiliary power to the battery system.

[0011] Furthermore, it also includes a second anti-reverse diode, the anode of which is connected to the positive output port of the AC / DC compatible input switching power supply, and the cathode is used to output DC power.

[0012] Furthermore, it also includes a first switch and a second switch; when the cathode of the second anti-reverse diode is connected to the first switch, the AC / DC compatible input switching power supply is used to provide auxiliary power to the control cabinet; when the cathode of the first anti-reverse diode is connected to the second switch, the AC / DC compatible input switching power supply is used to provide auxiliary power to the battery system.

[0013] Due to the adoption of the above technical solution, this utility model has the following advantages: it solves the problem of reliable and stable auxiliary power supply for on-grid and off-grid integrated energy storage systems, ensuring the operation of the system and ensuring that system data can still be stored normally when the battery has power in the event of a sudden power outage. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of an auxiliary power supply circuit for an integrated on-grid and off-grid energy storage system provided for an embodiment of this utility model. Detailed Implementation

[0016] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0017] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0018] like Figure 1 As shown, this utility model provides an embodiment of an auxiliary power supply circuit for an integrated on-grid and off-grid energy storage system, which includes a battery cluster, a PCS (energy storage converter) module, an uninterruptible power supply (UPS), and an AC / DC compatible input switching power supply UP1. The battery cluster includes a high-voltage control box and a series-connected battery box (Pack01-Pack0n, a total of n battery boxes). The high-voltage control box is connected to the series-connected battery box. One end of the high-voltage control box is connected to the input terminal of the UPS through the PCS module. The input terminal of the UPS is simultaneously connected to the mains power. The UPS converts AC power to DC power for auxiliary power supply to the control cabinet and battery system. The input terminal of the AC / DC compatible input switching power supply UP1 is connected to the other end of the high-voltage control box, and the input terminal of the UP1 is also connected to the mains power and the AC power output from the PCS module. The AC / DC compatible input switching power supply UP1 converts the input AC and DC power to DC power for auxiliary power supply to the control cabinet and battery system.

[0019] Optionally, when the mains power fails and / or the uninterruptible voltage source UPS is depleted, the AC / DC compatible input switching power supply UP1 is powered by the battery cluster for auxiliary power supply to the control cabinet and battery system.

[0020] Optionally, it also includes a DC-DC module; one end of the high-voltage control box is connected to the PCS module through the DC-DC module; the DC-DC module is used to convert the DC power output from the high-voltage control box and output the converted DC power to the PCS module.

[0021] Optionally, it also includes a first fuse F1; the first fuse F1 is disposed between the positive output port of the high-voltage control box and the positive input port of the AC / DC compatible input switching power supply UP1.

[0022] Optionally, a second fuse F2 is also included; the second fuse F2 is disposed between the output of the PCS module and the live wire input port of the AC / DC compatible input switching power supply UP1.

[0023] Optionally, it also includes a first anti-reverse diode D1, the anode of which is connected to the positive output port of the uninterruptible voltage source UPS, and the cathode is used to output DC power.

[0024] Optionally, it also includes a first switch MCB1 and a second switch MCB2; when the cathode of the first anti-reverse diode D1 is connected to the first switch MCB1, the uninterruptible power supply UPS is used to provide auxiliary power to the control cabinet; when the cathode of the first anti-reverse diode D1 is connected to the second switch MCB2, the uninterruptible power supply UPS is used to provide auxiliary power to the battery system.

[0025] Optionally, it also includes a second reverse protection diode D2, the anode of which is connected to the positive output port of the AC / DC compatible input switching power supply UP1, and the cathode is used to output DC power.

[0026] Optionally, it also includes a first switch MCB1 and a second switch MCB2; when the cathode of the second anti-reverse diode D2 is connected to the first switch MCB1, the AC / DC compatible input switching power supply UP1 is used to provide auxiliary power to the control cabinet; when the cathode of the first anti-reverse diode D1 is connected to the second switch MCB2, the AC / DC compatible input switching power supply UP1 is used to provide auxiliary power to the battery system.

[0027] When the system is connected to the grid: the external power grid will be connected to the AC side of the PCS, and other forms of energy will be connected to the DC-DC module after conversion. Usually, the mains power will provide AC input to both the UPS and the UPn power supply. The UPS and UPn output auxiliary power (not limited to 24V). At the same time, the UPn also has a DC input interface. The DC interface is connected to the front stage of the high voltage control box of the battery cluster to provide DC power to the system auxiliary power supply. Even when the grid power fails or the UPS is low on power, the energy storage battery cluster is charged, and the UPn also has the ability to provide auxiliary power to ensure data recording, remote monitoring, etc.

[0028] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of protection of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the scope of protection of this utility model.

Claims

1. An auxiliary power supply circuit for an integrated grid-connected and off-grid energy storage system, characterized in that, The system includes a battery cluster, a PCS module, an uninterruptible power supply (UPS), and an AC / DC compatible input switching power supply. The battery cluster includes a high-voltage control box and a series-connected battery box. The high-voltage control box is connected to the series-connected battery box. One end of the high-voltage control box is connected to the input terminal of the UPS via the PCS module. The input terminal of the UPS is also connected to the mains power supply. The UPS converts AC power to DC power for auxiliary power supply to the control cabinet and battery system. The input terminal of the AC / DC compatible input switching power supply is connected to the other end of the high-voltage control box. The input terminal of the AC / DC compatible input switching power supply is also connected to the mains power supply and the AC power output from the PCS module. The AC / DC compatible input switching power supply converts the input AC and DC power to DC power for auxiliary power supply to the control cabinet and battery system.

2. The auxiliary power supply circuit for the integrated grid-connected and off-grid energy storage system according to claim 1, characterized in that, When the mains power fails and / or the uninterruptible voltage source is depleted, the AC / DC compatible input switching power supply is powered through the battery cluster to provide auxiliary power to the control cabinet and battery system.

3. The auxiliary power supply circuit for the integrated grid-connected and off-grid energy storage system according to claim 1, characterized in that, It also includes a DC-DC module; one end of the high-voltage control box is connected to the PCS module through the DC-DC module; the DC-DC module is used to convert the DC power output from the high-voltage control box and output the converted DC power to the PCS module.

4. The auxiliary power supply circuit for the integrated grid-connected and off-grid energy storage system according to claim 1, characterized in that, It also includes a first fuse; the first fuse is located between the positive output port of the high-voltage control box and the positive input port of the AC / DC compatible input switching power supply.

5. The off-grid energy storage integrated system auxiliary power supply power supply circuit of claim 1, wherein, It also includes a second fuse; the second fuse is located between the output of the PCS module and the live wire input port of the AC / DC compatible input switching power supply.

6. The off-grid energy storage integrated system auxiliary power supply power supply circuit of claim 1, wherein, It also includes a first anti-reverse diode, the anode of which is connected to the positive output port of the uninterruptible voltage source, and the cathode is used to output DC power.

7. The auxiliary power supply circuit for the integrated grid-connected and off-grid energy storage system according to claim 6, characterized in that, It also includes a first switch and a second switch; when the cathode of the first anti-reverse diode is connected to the first switch, the uninterruptible voltage source is used to provide auxiliary power to the control cabinet; when the cathode of the first anti-reverse diode is connected to the second switch, the uninterruptible voltage source is used to provide auxiliary power to the battery system.

8. The off-grid energy storage integrated system auxiliary power supply power supply circuit of claim 1, wherein, It also includes a second anti-reverse diode, the anode of which is connected to the positive output port of the AC / DC compatible input switching power supply, and the cathode is used to output DC power.

9. The auxiliary power supply circuit for the integrated grid-connected and off-grid energy storage system according to claim 8, characterized in that, It also includes a first switch and a second switch; when the cathode of the second anti-reverse diode is connected to the first switch, the AC / DC compatible input switching power supply is used to provide auxiliary power to the control cabinet; when the cathode of the first anti-reverse diode is connected to the second switch, the AC / DC compatible input switching power supply is used to provide auxiliary power to the battery system.

Images