Power supply control circuit of high-voltage box, high-voltage box and energy storage outdoor cabinet

Abstract

The utility model relates to a power supply control circuit of a high-voltage box, the high-voltage box and an energy storage outdoor cabinet. The power supply control circuit utilizes the AC / DC module to convert AC commercial power into DC voltage to supply power to the load module when the AC commercial power supplies power normally. When the power supply of the alternating-current mains supply is abnormal, the battery cluster outputs battery voltage to supply power to the load module. And through the AC / DC module, when the power supply of the AC commercial power is normal, the DC voltage is controlled to be higher than the battery voltage. Redundant components such as contactors, pre-charging components, fuses and the like in a conventional high-voltage box are omitted. The design of the high-voltage box power supply control loop with high integration level is realized, the volume size of the high-voltage box is reduced, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of industrial and commercial energy storage systems, and in particular to a power supply control circuit for a high-voltage box, a high-voltage box, and an outdoor energy storage cabinet. Background Technology

[0002] Currently, commercial and industrial energy storage outdoor integrated cabinets have increasingly stringent requirements regarding space dimensions and product cost. The high-voltage box of the energy storage outdoor integrated cabinet, as the most important power supply module, provides power. Existing high-voltage boxes include UPS (Uninterruptible Power Supply) modules, typically connected to a 220V AC mains power supply on one end. This allows for the inversion and conversion of AC mains power into DC power to supply the load of the energy storage outdoor integrated cabinet or store it in high-power storage devices. It also provides DC power to the load when the AC mains power is disconnected, utilizing the high-power storage devices.

[0003] However, the existing high-voltage boxes have complex internal circuit modules, which occupy a large space in the outdoor integrated energy storage cabinet. Utility Model Content

[0004] Based on this, it is necessary to provide a power supply control circuit for a high-voltage box that eliminates redundant components such as contactors, pre-charge components, and fuses in conventional high-voltage boxes, reduces production costs, and achieves a highly integrated high-voltage box, as well as a high-voltage box and an outdoor energy storage cabinet.

[0005] In one aspect, a power supply control circuit for a high-voltage box is provided, comprising: a DC molded case circuit breaker and an AC / DC module.

[0006] The first terminal of the AC molded case circuit breaker can be used to connect to AC mains power. The first terminal of the AC / DC module is connected to the second terminal of the AC molded case circuit breaker. The second terminal of the AC / DC module is connected to the load module. The second terminal of the AC / DC module can also be used to connect to the battery pack.

[0007] The AC molded case circuit breaker is used to control the connection and disconnection of the circuit between the AC mains power and the load module;

[0008] The AC / DC module is used to convert the AC mains power into DC voltage to power the load module when the AC mains power supply is normal.

[0009] The battery cluster is used to output battery voltage to power the load module when the AC mains power supply is abnormal;

[0010] The AC / DC module is also used to control the DC voltage to be higher than the battery voltage when the AC mains power supply is normal.

[0011] In one embodiment, the second terminal of the AC / DC module is connected to the input terminal of the first blocking current-carrying diode, the output terminal of the first blocking current-carrying diode is connected to the output terminal of the second blocking current-carrying diode, and the input terminal of the second blocking current-carrying diode can be used to connect the battery cluster.

[0012] The first and second blocking diodes are used to reverse bias and block the current when the battery cluster supplies power to the load module, thereby preventing circulating current from being generated between the AC mains power and the battery cluster.

[0013] In one embodiment, the input terminal of the second blocking current diode is also connected to a first terminal of the DC / DC module, and the second terminal of the DC / DC module can be used to connect to the battery cluster.

[0014] The DC / DC module is used to convert the raw voltage generated by the battery cluster into a stable output battery voltage.

[0015] In one embodiment, the second terminal of the DC / DC module is also connected to the first terminal of a DC microcircuit breaker, and the second terminal of the DC microcircuit breaker is connected to the battery cluster.

[0016] The DC microcircuit breaker is used to control the battery current output by the battery cluster to maintain within a preset current range.

[0017] In one embodiment, the second terminal of the DC microcircuit breaker is connected to the first terminal of a DC fuse, and the second terminal of the DC fuse is connected to the battery cluster.

[0018] The DC fuse is used to disconnect the connection circuit between the battery cluster and the load module when the battery current of the battery cluster exceeds the preset current range.

[0019] In one embodiment, the second terminal of the AC molded case circuit breaker is also connected to the first terminal of an external switch, and the second terminal of the external switch is connected to the first terminal of the AC / DC module.

[0020] The external switch is used to control the connection between the AC mains power and the load module, thereby controlling the operation of the high-voltage box power supply control circuit.

[0021] Secondly, a high-voltage box power supply circuit is provided, including an energy storage converter, a DC molded case circuit breaker, and the power supply control circuit of the high-voltage box described in the first aspect. The input terminal of the energy storage converter is connected to AC mains power, the output terminal of the energy storage converter is connected to the first terminal of the DC molded case circuit breaker, and the second terminal of the DC molded case circuit breaker is connected to a battery pack.

[0022] The input terminal of the power supply control circuit of the high-voltage box is connected to the input terminal of the energy storage converter, and the output terminal of the power supply control circuit of the high-voltage box is connected to the battery cluster and the load module.

[0023] Thirdly, a high-voltage box is provided, including the high-voltage box power supply circuit and battery cluster described in the second aspect above, wherein the high-voltage box power supply circuit is connected to the battery cluster.

[0024] Fourthly, an outdoor energy storage cabinet is provided, comprising a power supply control circuit for a high-voltage box as described in the first aspect, a battery cluster, and a load module. The power supply control circuit for the high-voltage box is connected to the battery cluster and the load module. The load module includes multiple load units connected in parallel, each load unit receiving the DC voltage output from the power supply control circuit of the high-voltage box to form a working circuit.

[0025] The aforementioned high-voltage box power supply control circuit, high-voltage box, and energy storage outdoor cabinet, by constructing a power supply control circuit for the high-voltage box, only retains the DC molded case circuit breaker found in existing high-voltage box power supply circuits, eliminating redundant components such as contactors, pre-charging components, and fuses found in conventional high-voltage boxes. When the AC 220V AC mains power supply is normal, an AC / DC module converts the AC 220V AC mains power to DC voltage to power the load module. When the AC mains power supply is abnormal, the battery cluster outputs battery voltage to power the load module. By placing an AC / DC module between the AC mains power and the battery cluster, the DC voltage is controlled to be higher than the battery voltage when the AC mains power supply is normal. This achieves a highly integrated high-voltage box power supply circuit design, which helps to reduce the size of the high-voltage box and lower production costs. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 Here is a structural block diagram of the power supply control circuit of a high-voltage box according to one embodiment. Figure 1 ;

[0028] Figure 2 Here is a structural block diagram of the power supply control circuit of a high-voltage box according to one embodiment. Figure 2 ;

[0029] Figure 3 Here is a structural block diagram of the power supply control circuit of a high-voltage box according to one embodiment. Figure 3 ;

[0030] Figure 4 Here is a structural block diagram of the power supply control circuit of a high-voltage box according to one embodiment. Figure 4 ;

[0031] Figure 5 Here is a structural block diagram of the power supply control circuit of a high-voltage box according to one embodiment. Figure 5 ;

[0032] Figure 6 Here is a structural block diagram of the power supply control circuit of a high-voltage box according to one embodiment. Figure 6 ;

[0033] Figure 7 A structural block diagram of the power supply control circuit of a high-voltage box according to a preferred embodiment;

[0034] Figure 8 This is a structural block diagram of a high-voltage box power supply circuit according to one embodiment. Detailed Implementation

[0035] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0037] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0038] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0039] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0040] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0041] like Figure 1 As shown, in one embodiment, the power supply control circuit of the high-voltage box includes an AC molded case circuit breaker 20 and an AC / DC module 30. The first terminal of the AC molded case circuit breaker 20 is connected to AC mains power. The first terminal of the AC / DC module 30 is connected to the second terminal of the AC molded case circuit breaker 20, and the second terminal of the AC / DC module 30 is connected to a load module. The second terminal of the AC / DC module 30 can also be used to connect to a battery pack. The load module can be a load inside the high-voltage box or a load inside an outdoor energy storage cabinet.

[0042] The AC molded case circuit breaker 20 is used to control the connection and disconnection of the circuit between the AC mains power and the load module.

[0043] The AC / DC module 30 is used to convert the AC mains power into DC voltage to power the load module when the AC mains power supply is normal.

[0044] The battery cluster is used to output battery voltage to power the load module when the AC mains power supply is abnormal.

[0045] The AC / DC module 30 is also used to control the DC voltage to be higher than the battery voltage when the AC mains power supply is normal.

[0046] In this embodiment, by constructing a power supply control circuit for the high-voltage box, only the DC molded case circuit breaker of the existing high-voltage box power supply circuit is retained, eliminating redundant components such as contactors, pre-charge components, and fuses found in conventional high-voltage boxes. An AC / DC module is used to convert AC mains power to DC voltage to power the load module when AC mains power is normal. When AC mains power is abnormal, the battery cluster outputs battery voltage to power the load module. By placing an AC / DC module between the AC mains power and the battery cluster, the DC voltage is controlled to be higher than the battery voltage when AC mains power is normal. This achieves a highly integrated high-voltage box power supply circuit design, which helps to reduce the size of the high-voltage box and lower production costs.

[0047] In one embodiment, such as Figure 2As shown, the power supply control circuit of the high-voltage box also includes a first blocking current diode D1 and a second blocking current diode D2. The second terminal of the AC / DC module 30 is connected to the input terminal of the first blocking current diode D1, the output terminal of the first blocking current diode D1 is connected to the output terminal of the second blocking current diode D2, and the input terminal of the second blocking current diode D2 can be used to connect the battery cluster.

[0048] The first circulating current blocking diode D1 and the second circulating current blocking diode D2 are used to reverse bias and block the current when the battery cluster supplies power to the load module, thereby preventing circulating current from being generated between the AC mains power and the battery cluster.

[0049] More specifically, such as Figure 3 As shown, the power supply control circuit of the high-voltage box also includes a DC / DC module 50. The input terminal of the second blocking current diode D2 is also connected to the first terminal of the DC / DC module, and the second terminal of the DC / DC module can be used to connect the battery cluster.

[0050] The DC / DC module 50 is used to convert the original voltage generated by the battery cluster into a stable output battery voltage.

[0051] Specifically, the original voltage of the battery cluster is less than or equal to 1000V, while the operating voltage of the load module is 24V. Therefore, the DC / DC module converts the original 1000V voltage generated by the battery cluster into a stable output 24V battery voltage to power the load module.

[0052] Furthermore, such as Figure 4 As shown, the power supply control circuit of the high-voltage box also includes a DC microcircuit breaker 60. The second terminal of the DC / DC module 50 is also connected to the first terminal of the DC microcircuit breaker 60, and the second terminal of the DC microcircuit breaker 60 can be used to connect the battery cluster.

[0053] The DC microcircuit breaker 60 is used to control the battery current output by the battery cluster to maintain within a preset current range.

[0054] More preferably, such as Figure 5 As shown, the power supply control circuit of the high-voltage box also includes a DC fuse 70. The second end of the DC microcircuit breaker 60 is connected to the first end of the DC fuse 70, and the second end of the DC fuse 70 can be used to connect the battery cluster.

[0055] The DC fuse 70 is used to control the connection circuit between the battery cluster and the load module to disconnect when the battery current of the battery cluster exceeds the preset current range.

[0056] In this embodiment, by setting up a DC microcircuit breaker and a DC fuse, the shunt tripping of the battery cluster is achieved. When the AC mains power is lost and the battery cluster is undervoltage, the DC microcircuit breaker can be linked to disconnect its circuit, thereby ensuring that the battery cluster will not discharge to an extreme degree and thus damage the battery life.

[0057] In one embodiment, such as Figure 6 As shown, the power supply control circuit of the high-voltage box also includes an external switch SQ. The second terminal of the AC molded case circuit breaker 20 is also connected to the first terminal of the external switch SQ, and the second terminal of the external switch SQ is connected to the first terminal of the AC / DC module 30.

[0058] The external switch SQ is used to control the connection between the AC mains power and the load module, thereby controlling the operation of the power supply control circuit of the high-voltage box.

[0059] In detail, in the power supply control circuit, the AC molded case circuit breaker is in the closed state under normal conditions. Therefore, by setting an external switch SQ in the power supply control circuit, the connection between the AC mains power and the load module is controlled by controlling the closed state of the external switch, thereby controlling the operation of the power supply control circuit of the high voltage box.

[0060] In a preferred embodiment, such as Figure 7 As shown, a power supply control circuit for a high-voltage box is provided, including an AC molded case circuit breaker 20, an external switch SQ, an AC / DC module 30, a first blocking current diode D1, a second blocking current diode D2, a DC / DC module 50, a DC micro-circuit breaker 60, and a DC fuse 70 connected in series.

[0061] In this circuit, the first terminal of the AC molded case circuit breaker 20 is connected to AC 220V AC mains power. The first terminal of the AC / DC module 30 is connected to the second terminal of the AC molded case circuit breaker 20. The second terminal of the AC / DC module 30 is connected to the input terminal of the first blocking current diode D1, and the output terminal of the first blocking current diode D1 is connected to the output terminal of the second blocking current diode D2. The input terminal of the second blocking current diode D2 is also connected to the first terminal of the DC / DC module 50. The second terminal of the DC fuse 70 is connected to the battery pack. Multiple load units are connected in parallel between the first blocking current diode D1 and the second blocking current diode D2.

[0062] When the AC mains power is normal, the AC mains power supplies multiple load units through the AC molded case circuit breaker 20, external switch SQ1, AC / DC module 30, and first blocking current diode D1. When the AC mains power is disconnected, the positive and negative terminals of the battery cluster supply power to multiple load units through the DC fuse 70, DC microcircuit breaker 60, DC / DC module 50, and second blocking current diode D2.

[0063] Simultaneously, the ADJ unit of AC / DC module 30 is used to regulate the DC voltage, ensuring that the DC voltage at the output side of the AC / DC module is slightly higher than the battery voltage at the output side of the DC / DC module. Since the voltage at the parallel connection node is determined by the side with the higher output voltage, under normal power supply, even if there is a voltage difference at the outputs, the side with the lower output voltage will not output current due to the reverse-biased blocking diode connected in series, thus preventing the risk of circulating current. This also ensures that when AC mains power is restored after an outage, the power supply for multiple load units can switch from the battery pack to AC mains, thereby reducing battery pack discharge losses.

[0064] In one embodiment, such as Figure 8 As shown, a high-voltage box power supply circuit is provided, including as follows: Figure 7 The diagram shows the power supply control circuit of the high-voltage box, as well as the energy storage converter 10 and the DC molded case circuit breaker 40. The input terminal of the energy storage converter 10 is connected to AC 220V mains power. The output terminal of the energy storage converter 10 is connected to the first terminal of the DC molded case circuit breaker 40, and the second terminal of the DC molded case circuit breaker 40 is connected to the battery pack. The input terminal of the power supply control circuit of the high-voltage box is connected to the input terminal of the energy storage converter 10, and the output terminal of the power supply control circuit of the high-voltage box is connected to the battery pack and the load module.

[0065] In one embodiment, a high-voltage box is provided, including a high-voltage box power supply circuit and a battery cluster as described in the above embodiments, wherein the high-voltage box power supply circuit is connected to the battery cluster. The high-voltage box can implement the functions corresponding to the power supply control circuit of the high-voltage box as described in the above embodiments.

[0066] In one embodiment, an outdoor energy storage cabinet is provided, including a power supply control circuit for a high-voltage box as described in the above embodiments, a battery cluster, and a load module. The power supply control circuit for the high-voltage box is connected to the battery cluster and the load module. The load module includes multiple load units connected in parallel, which are used to receive the DC voltage output by the power supply control circuit of the high-voltage box to form a working circuit.

[0067] In detail, the power supply control circuit of this high-voltage box can support power supply to the battery management module (BMU) of the outdoor energy storage cabinet, and the power supply can be configured according to the number of battery management modules. It supports CAN communication with the battery management module (BMU) of the outdoor energy storage cabinet to achieve the aggregation and management of battery cluster information. It supports LAN and CAN communication with the battery management system host (ESMU) of the outdoor energy storage cabinet to achieve information exchange. It supports communication control and dry contact control with the energy storage converter, supporting CAN communication and RS-485 communication methods. It supports automatic addressing function of the battery management system (BCU) of the outdoor energy storage cabinet. Furthermore, this high-voltage box has a black-start function. When the outdoor energy storage cabinet is off-grid, the battery clusters provide power for black-start. Simultaneously, when the battery management system (BCU) of this high-voltage box receives a black-start command, the BCU outputs a start signal to the energy storage converter to start the entire system, realizing the black-start of the energy storage system.

[0068] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A power supply control circuit for a high-voltage box, characterized in that, include: AC molded case circuit breakers, AC / DC modules, The first terminal of the AC molded case circuit breaker can be used to connect to AC mains power. The first terminal of the AC / DC module is connected to the second terminal of the AC molded case circuit breaker. The second terminal of the AC / DC module is connected to the load module. The second terminal of the AC / DC module can also be used to connect to a battery pack. The AC molded case circuit breaker is used to control the connection and disconnection of the circuit between the AC mains power and the load module; The AC / DC module is used to convert the AC mains power into DC voltage to power the load module when the AC mains power supply is normal. The battery cluster is used to output battery voltage to power the load module when the AC mains power supply is abnormal; The AC / DC module is also used to control the DC voltage to be higher than the battery voltage when the AC mains power supply is normal.

2. The power supply control circuit for the high-voltage box according to claim 1, characterized in that, The second terminal of the AC / DC module is connected to the input terminal of the first blocking current-carrying diode, the output terminal of the first blocking current-carrying diode is connected to the output terminal of the second blocking current-carrying diode, and the input terminal of the second blocking current-carrying diode can be used to connect the battery cluster. The first and second blocking diodes are used to reverse bias and block the current when the battery cluster supplies power to the load module, thereby preventing circulating current from being generated between the AC mains power and the battery cluster.

3. The power supply control circuit for the high-voltage box according to claim 2, characterized in that, The input terminal of the second blocking diode is also connected to the first terminal of the DC / DC module, and the second terminal of the DC / DC module can be used to connect to the battery pack. The DC / DC module is used to convert the raw voltage generated by the battery cluster into a stable output battery voltage.

4. The power supply control circuit for the high-voltage box according to claim 3, characterized in that, The second terminal of the DC / DC module is also connected to the first terminal of the DC microcircuit breaker, and the second terminal of the DC microcircuit breaker is connected to the battery cluster. The DC microcircuit breaker is used to control the battery current output by the battery cluster to maintain within a preset current range.

5. The power supply control circuit for the high-voltage box according to claim 4, characterized in that, The second terminal of the DC microcircuit breaker is connected to the first terminal of the DC fuse, and the second terminal of the DC fuse is connected to the battery cluster. The DC fuse is used to disconnect the connection circuit between the battery cluster and the load module when the battery current of the battery cluster exceeds the preset current range.

6. The power supply control circuit for the high-voltage box according to claim 1, characterized in that, The second terminal of the AC molded case circuit breaker is also connected to the first terminal of an external switch, and the second terminal of the external switch is connected to the first terminal of the AC / DC module. The external switch is used to control the connection between the AC mains power and the load module, thereby controlling the operation of the high-voltage box power supply control circuit.

7. A high-voltage box power supply circuit, characterized in that, The system includes an energy storage converter, a DC molded case circuit breaker, and a power supply control circuit for a high-voltage box as described in any one of claims 1 to 6, wherein the input terminal of the energy storage converter is connected to AC mains power, the output terminal of the energy storage converter is connected to the first terminal of the DC molded case circuit breaker, and the second terminal of the DC molded case circuit breaker is connected to a battery pack. The input terminal of the power supply control circuit of the high-voltage box is connected to the input terminal of the energy storage converter, and the output terminal of the power supply control circuit of the high-voltage box is connected to the battery cluster and the load module.

8. A high-pressure box, characterized in that, It includes the high-voltage box power supply circuit as described in claim 7 and the battery cluster, wherein the high-voltage box power supply circuit is connected to the battery cluster.

9. An outdoor energy storage cabinet, characterized in that, It includes a power supply control circuit, a battery pack, and a load module for a high-voltage box as described in any one of claims 1 to 8, wherein the power supply control circuit of the high-voltage box is connected to the battery pack and the load module.

10. The outdoor energy storage cabinet according to claim 9, characterized in that, The load module includes multiple load units connected in parallel. The load units are used to receive the DC voltage output by the power supply control circuit of the high-voltage box to form a working circuit.

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