Power distribution circuit board of energy storage system and energy storage system

Abstract

The utility model discloses a power distribution circuit board of an energy storage system and the energy storage system, the power distribution circuit board of the energy storage system comprises a three-phase load power supply module, the three-phase load power supply module comprises a first AC copper bar, a first onboard fuse base and a first connector, the first connector is coupled to the first AC copper bar through the first onboard fuse base, and the first connector is coupled to the first AC copper bar through the first onboard fuse base; the first connector is used for connecting three-phase alternating current electric equipment; the single-phase load power supply module comprises a second alternating-current copper bar, a second onboard fuse base and a second connector, the second connector is coupled to the second alternating-current copper bar through the second onboard fuse base, and the second connector is used for being connected with single-phase alternating-current electric equipment; the direct current load power supply module comprises a direct current copper bar, an electric fuse and a third connector, the third connector is coupled to the direct current copper bar through the electric fuse, and the third connector is used for being connected with direct current electric equipment. According to the embodiment of the invention, the size of the power distribution module of the energy storage system can be reduced, and the usability of the power distribution module can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic circuit, in particular to a power distribution circuit board of energy storage system and the energy storage system. BACKGROUND

[0002] The energy storage system includes a central control room, and an AC / DC power distribution module is arranged in the central control room. A traditional AC power distribution module uses different types of rail circuit breakers as overcurrent protection devices, which occupies a large space and has complex wiring. A traditional DC power distribution module uses different types of rail fuses as loop overcurrent protection devices, which also occupies a large space and needs to consider wiring isolation from the AC power distribution module. Therefore, the AC / DC power distribution module of the current energy storage system has problems of large size, low ease of use, high maintenance cost and the like. CONTENT OF THE INVENTION

[0003] The embodiment of the present application provides a power distribution circuit board of energy storage system and the energy storage system, which can reduce the size of the power distribution module of the energy storage system and improve the ease of use of the power distribution module.

[0004] In a first aspect, the embodiment of the present application provides a power distribution circuit board of energy storage system, which comprises:

[0005] A three-phase load power supply module comprises a first AC copper bar, a first on-board fuse base and a first connector, the first connector is coupled to the first AC copper bar through the first on-board fuse base, and the first connector is used for a three-phase AC electrical equipment;

[0006] A single-phase load power supply module comprises a second AC copper bar, a second on-board fuse base and a second connector, the second connector is coupled to the second AC copper bar through the second on-board fuse base, and the second connector is used for a single-phase AC electrical equipment;

[0007] A DC load power supply module comprises a DC copper bar, an electric fuse and a third connector, the third connector is coupled to the DC copper bar through the electric fuse, and the third connector is used for a DC electrical equipment.

[0008] In some embodiments, the first on-board fuse base is fixed to the power distribution circuit board through its own pin to be coupled to the first AC copper bar and the corresponding first connector;

[0009] And / or, the second on-board fuse base is fixed to the power distribution circuit board through its own pin to be coupled to the second AC copper bar and the corresponding second connector.

[0010] In some embodiments, the energy storage system further comprises a monitoring module; the first on-board fuse base comprises a first feedback contact, the second on-board fuse base comprises a second feedback contact, and the first feedback contact and the second feedback contact are used to connect signal collection pins of the monitoring module.

[0011] In some embodiments, the electric fuse comprises a micro switch and a control chip, a control pin of the control chip is connected to a control end of the micro switch, and two switch ends of the micro switch are coupled to the DC copper bar and the corresponding third connector, respectively.

[0012] In some embodiments, at least one of the first connector, the second connector and the third connector is a pluggable connection terminal.

[0013] In some embodiments, the power distribution circuit board is a multi-layer board structure, and at least one of the first AC copper bar, the second AC copper bar and the DC copper bar is arranged on an inner layer board of the power distribution circuit board.

[0014] In some embodiments, the three-phase load power supply module is arranged in a first circuit area of the power distribution circuit board, the single-phase load power supply module is arranged in a second circuit area of the power distribution circuit board, and the DC load power supply module is arranged in a third circuit area of the power distribution circuit board; the first circuit area, the second circuit area and the third circuit area are arranged in sequence along a length direction of the power distribution circuit board.

[0015] In some embodiments, the first circuit area, the second circuit area and the third circuit area are electrically connected through an interior of the power distribution circuit board; the first circuit area, the second circuit area and the third circuit area are each provided with an RS485 communication port, and the RS485 communication port is used to connect a monitoring module of the energy storage system.

[0016] In the second aspect, embodiments of the present application provide an energy storage system comprising the power distribution circuit board as described in the first aspect.

[0017] In some embodiments, the energy storage system further comprises a central control cabinet, and the power distribution circuit board is arranged in the central control cabinet.

[0018] The power distribution circuit board and the energy storage system have at least the following beneficial effects: the power distribution circuit board integrates a three-phase load power supply module, a single-phase load power supply module and a direct-current load power supply module, wherein the three-phase load power supply module and the single-phase load power supply module both adopt a board-mounted fuse holder, and the direct-current load power supply module adopts an electric fuse, which is small in size and can be reused after self-recovery, so that compared with a traditional power distribution circuit board using a guide rail type fuse holder, the power distribution circuit board of the embodiment greatly reduces the size, and the wiring mode of the board-mounted fuse holder and the electric fuse is relatively simpler than that of the traditional guide rail type fuse holder, so that the wiring of the power distribution circuit board can be simplified, the convenience of the installation and maintenance personnel in connecting the power distribution cable is improved, and the step of replacing the fuse core after overcurrent protection of the traditional guide rail type fuse can be omitted by using the self-recovery feature of the electric fuse.

[0019] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by means of the structure particularly pointed out in the description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a module schematic diagram of the power distribution circuit board provided by the embodiment of the present application;

[0021] Figure 2 is a component layout schematic diagram of the power distribution circuit board provided by the embodiment of the present application;

[0022] Figure 3 is a schematic diagram of an energy storage system provided by one embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application. In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be sequentially changed or adjusted in a manner that is obvious to those skilled in the art. Therefore, the order in the specification and the drawings is only for clear description of a certain embodiment, and does not mean that it is a necessary order, unless otherwise stated that a certain order must be followed.

[0024] In the description of the present application, the meaning of one or more is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. is understood as not including the number, above, below, etc. is understood as including the number. If the first, second is described, it is only used to distinguish the technical features for the purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0025] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified.

[0026] The energy storage system includes a central control room, and an AC / DC power distribution module is arranged in the central control room. The traditional AC power distribution module uses different types of rail circuit breakers as overcurrent protection devices, which occupies a large space and has complex wiring. The traditional DC power distribution module uses different types of rail fuses as loop overcurrent protection devices, which also occupies a large space and needs to consider wiring isolation from the AC power distribution module. Therefore, the AC / DC power distribution module of the current energy storage system has problems of large volume, low ease of use, high maintenance cost, etc.

[0027] Based on this, the present application provides an energy storage system power distribution circuit board and an energy storage system. The power distribution circuit board of the present application integrates a three-phase load power supply module, a single-phase load power supply module and a DC load power supply module. The three-phase load power supply module and the single-phase load power supply module both use a board-mounted fuse base, and the DC load power supply module uses an electric fuse. The volume is relatively small and can realize self-recovery reuse. Therefore, compared with the traditional power distribution circuit board using a rail fuse base, the power distribution circuit board of the present application greatly reduces the volume, and the wiring method of the board-mounted fuse base and the electric fuse is relatively simpler than the traditional rail fuse base, which can simplify the wiring of the power distribution circuit board, improve the convenience of the installation and maintenance personnel when connecting the power distribution cable, and use the self-recovery characteristic of the electric fuse to save the step of replacing the fuse core after the overcurrent protection of the traditional rail fuse.

[0028] The power distribution circuit board of the energy storage system and the energy storage system thereof will be described below with reference to the accompanying drawings.

[0029] Referring to Figure 1 , the Figure 1 is a module schematic diagram of the power distribution circuit board provided by the present application.

[0030] In some embodiments, the power distribution circuit board 100 of the energy storage system includes a three-phase load power supply module 200, a single-phase load power supply module 300 and a DC load power supply module 400.

[0031] Specifically, the three-phase load power supply module 200 includes a first AC copper bar 210, a first on-board fuse base 220, and a first connector 230 coupled to the first AC copper bar 210 through the first on-board fuse base 220, and the first connector 230 is used to connect a three-phase AC electrical device. In the embodiment of the present application, overcurrent protection is achieved by arranging a first on-board fuse between the first connector 230 and the first AC copper bar 210, thereby improving the safety of the three-phase load power supply module 200 and further improving the safety of the power distribution circuit board 100.

[0032] It should be noted that the three-phase load power supply module 200 includes at least one first connector 230, wherein the first connector 230 can also be directly connected to the first AC copper bar 210 through a wire, that is, the first connector 230 in the three-phase load power supply module 200 can be coupled to the first AC copper bar 210 through the first on-board fuse base 220, or can be directly connected to the first AC copper bar 210 through a wire.

[0033] It can be understood that the first on-board fuse can protect the circuit from overcurrent, and when the current exceeds the set value, the first on-board fuse will be fused, thereby cutting off the circuit and protecting the circuit and the device from damage. The three-phase AC electrical device includes but is not limited to a three-phase transformer, a three-phase motor, a three-phase generator, etc., and the embodiment of the present application does not make specific limitations.

[0034] In some embodiments, the single-phase load power supply module 300 includes a second AC copper bar 310, a second on-board fuse base 320, and a second connector 330 coupled to the second AC copper bar 310 through the second on-board fuse base 320, and the second connector 330 is used to connect a single-phase AC electrical device. In the embodiment of the present application, overcurrent protection is achieved by arranging a second on-board fuse between the second connector 330 and the second AC copper bar 310, thereby improving the safety of the single-phase load power supply module 300 and further improving the safety of the power distribution circuit board 100.

[0035] It can be understood that the second on-board fuse can protect the circuit from overcurrent, and when the current exceeds the set value, the second on-board fuse will be fused, thereby cutting off the circuit and protecting the circuit and the device from damage. The single-phase AC electrical device includes but is not limited to lighting devices, household appliances, etc., and the embodiment of the present application does not make specific limitations.

[0036] In some embodiments, the direct current load power supply module 400 comprises a direct current copper bar 410, an electric fuse 420, and a third connector 430 coupled to the direct current copper bar 410 through the electric fuse 420, the third connector 430 being used for connecting a direct current electrical device, the electric fuse 420 being capable of being reused while realizing overcurrent protection, thereby ensuring the continuity and reliability of the circuit.

[0037] It is worth noting that the electric fuse 420 in the embodiments of the present application can be reused, that is, when the current exceeds the set value, the electric fuse 420 will cut off the circuit to protect the circuit and the device from damage, and when the current decreases to within the set value, the electric fuse 420 can be restored to the connected state, thereby ensuring the continuity and reliability of the circuit, reducing maintenance costs and interruption time, and further reducing unnecessary replacement and maintenance.

[0038] Referring to Figure 2 , it is shown that Figure 2 is a schematic diagram of the element layout of the power distribution circuit board 100 provided by the embodiments of the present application.

[0039] In some embodiments, the first on-board fuse base 220 is fixed to the power distribution circuit board 100 through its own pin to be coupled to the first alternating current copper bar 210 and the corresponding first connector 230, the first on-board fuse base 220 being fixed to the circuit board through the pin to be capable of providing stable mechanical support to prevent the power distribution circuit board 100 from being bent or deformed during use, thereby ensuring the stability and reliability of the device, while being capable of simplifying the installation and maintenance work, and / or the second on-board fuse base 320 is fixed to the power distribution circuit board 100 through its own pin to be coupled to the second alternating current copper bar 310 and the corresponding second connector 330, similarly, the second on-board fuse base 320 is fixed to the circuit board through the pin to also be capable of providing stable mechanical support to prevent the power distribution circuit board 100 from being bent or deformed during use, thereby ensuring the stability and reliability of the device.

[0040] It can be understood that the pin fixing mode of the embodiments of the present application can provide electrical isolation between the power distribution circuit board 100 and other metal components to avoid short circuit and signal interference and ensure the safe operation of the circuit.

[0041] In some embodiments, the energy storage system 500 further comprises a monitoring module for monitoring the communication of the three-phase load power supply module 200, the single-phase load power supply module 300, and / or the direct current load power supply module 400 to realize real-time monitoring of the three-phase load power supply module 200, the single-phase load power supply module 300, and / or the direct current load power supply module 400, thereby improving the safety and reliability of the circuit.

[0042] Notably, the first on-board fuse base 220 includes a first feedback contact, and the second on-board fuse base 320 includes a second feedback contact, which are used to connect the signal collection pins of the monitoring module, so that the signals transmitted through the first feedback contact can feedback the state of the first on-board fuse base 220, and the signals transmitted through the second feedback contact can feedback the state of the second on-board fuse base 320, thereby realizing real-time feedback of the first on-board fuse base 220 and the second on-board fuse base 320.

[0043] In some embodiments, the first on-board fuse base 220 further includes a first fuse core, and the second on-board fuse base 320 further includes a second fuse core, wherein the models of the first on-board fuse base 220 and the second on-board fuse base 320 are consistent, and the current parameter models of the first fuse core and the second fuse core can be set according to the needs of the user, thereby realizing overcurrent protection for different load devices.

[0044] It can be understood that the first fuse core and the second fuse core are used to cut off the circuit when the circuit is overloaded or short-circuited, and since the current exceeds the rated value of the fuse core, the fuse core will be melted due to heat, thereby protecting the circuit and the device from damage.

[0045] Specifically, the signal transmitted by the first feedback contact can indicate the state of the first fuse core, and the signal transmitted by the second feedback contact can indicate the state of the second fuse core. When the fuse core is melted, the feedback contact will change its state (for example, from closed to open), and this state change is used to provide a signal to the circuit or device indicating whether the fuse has acted, thereby realizing monitoring of the state of the circuit and protection of the circuit.

[0046] In some embodiments, the electric fuse 420 includes a micro switch and a control chip, the control pin of the control chip is connected to the control end of the micro switch to adjust the electric fuse 420 to switch to different states, and the two switch ends of the micro switch are respectively coupled to the direct current copper bar 410 and the corresponding third connector 430, thereby ensuring the stability and reliability of the device, and simplifying the installation and maintenance work.

[0047] It can be understood that the design of the electric fuse 420 has an anti-time delay feature, that is, within a certain range of overload current, the fuse will not be melted until the current returns to normal, and the fuse can continue to be used after the cutting action, thereby ensuring the continuity and reliability of the circuit, reducing maintenance costs and interruption time, and further reducing unnecessary replacement and maintenance.

[0048] Specifically, the electric fuse 420 in the embodiment of the present application can be an E-FUSE protection device, that is, the E-FUSE includes a control chip and a switch, the E-FUSE serves as a direct current 24V loop short circuit and overload protection, and can be restored after action, supporting repeated use.

[0049] In some embodiments, the traditional energy storage system 500 has a large space size, complex internal AC and DC wiring, and different energy storage system 500 control room power distribution modules need to be redesigned. The three-phase load power supply module 200 in the embodiment of the present application is arranged in the first circuit area of the power distribution circuit board 100, the single-phase load power supply module 300 is arranged in the second circuit area of the power distribution circuit board 100, and the direct current load power supply module 400 is arranged in the third circuit area of the power distribution circuit board 100. The power distribution circuit board 100 of the embodiment of the present application can simultaneously compatible with the three-phase load power supply module 200, the single-phase load power supply module 300 and the direct current load power supply module 400, reducing the volume of the power distribution circuit board 100, wherein the first circuit area, the second circuit area and the third circuit area are arranged in sequence along the length direction of the power distribution circuit board 100.

[0050] Reference Figure 2 The three-phase load power supply module 200 in the embodiment of the present application is arranged in the first circuit area of the power distribution circuit board 100, the single-phase load power supply module 300 is arranged in the second circuit area of the power distribution circuit board 100, and the direct current load power supply module 400 is arranged in the third circuit area of the power distribution circuit board 100. Moreover, the three-phase load power supply module 200 includes a plurality of first connectors 230, three first connectors 230 are shown in the figure, which are represented as XP1, XP11 and XP1n respectively, the single-phase load power supply module 300 includes a plurality of second connectors 330, four second connectors 330 are shown in the figure, which are represented as XP21, XP22, XP23 and XP2m respectively, and the direct current load power supply module 400 includes a plurality of third connectors 430, three third connectors 430 are shown in the figure, which are represented as XP31, XP32 and XP3i respectively. The number of ports of the first connector 230 in the three-phase load power supply module 200 can be the same or different, and the number of ports of the first connector 230 is five and four respectively in the figure as an example. The number of ports of the second connector 330 in the single-phase load power supply module 300 is two, and the number of ports of the third connector 430 in the direct current load power supply module 400 is two.

[0051] By Figure 2It can be known that the three-phase load power supply module 200 includes five first AC copper bars 210, and the five first AC copper bars 210 are respectively live wire, zero line and ground wire, and are respectively denoted as L1, L2, L3, N and PE; the single-phase load power supply module 300 includes two second AC copper bars 310, and the two second AC copper bars 310 are respectively live wire and zero line, and are denoted as L and N; and the DC load power supply module 400 includes two DC copper bars 410, and the two DC copper bars 410 are respectively positive and negative, and are denoted as 24V+ and 0V.

[0052] Specifically, the first connectors 230 with labels XP11 and XP1n in the three-phase load power supply module 200 are coupled to the first AC copper bars 210 through the first on-board fuse bases 220, and the first connector 230 with a label XP1 is directly connected to the first AC copper bar 210; one end of all the second connectors 330 in the single-phase load power supply module 300 is coupled to the second AC copper bar 310 through the second on-board fuse base 320; and all the third connectors 430 in the DC load power supply module 400 are coupled to the DC copper bar 410 through the electric fuse 420. The power distribution circuit board 100 in the embodiment of the application can be compatible with multiple models of current protection devices, simplify the wiring structure, and improve the neatness of the circuit.

[0053] In some embodiments, at least one of the first connector 230, the second connector 330 and the third connector 430 is a pluggable connection terminal, so that the electrical equipment can be quickly connected or disconnected, without the need for additional welding process or screws and nuts to fix the connection, simplifying the connection process and further reducing the time and workload of assembly and maintenance.

[0054] It can be understood that the first connector 230 and the second connector 330 in the embodiment of the application can be pluggable connection terminals, the first connector 230, the second connector 330 and the third connector 430 can all be pluggable connection terminals, and the like, and the embodiment of the application does not make specific limitations.

[0055] In some embodiments, the traditional AC power distribution part uses different models of guide rail type miniature circuit breakers as overcurrent protection devices, which occupies a large space and has complex wiring. In order to avoid the above problems, the power distribution circuit board 100 in the embodiment of the application is a multi-layer board structure, and at least one of the first AC copper bar 210, the second AC copper bar 310 and the DC copper bar 410 is arranged on the inner layer board of the power distribution circuit board 100. The copper bar is arranged on the inner layer board of the power distribution circuit board 100, the complex AC wiring in the past is optimized, and the cross-coupling problem between the inner and outer layer signal pins can be reduced, so that the influence of cross interference is reduced.

[0056] It can be understood that at least one of the first AC copper bar 210, the second AC copper bar 310 and the DC copper bar 410 of the embodiment of the present application is arranged on the inner layer plate of the power distribution circuit board 100, and at least one of the first connector 230, the second connector 330 and the third connector 430 is a pluggable connection terminal, which can optimize the complex AC wiring as a whole, and can select a suitable power port according to the load, which is convenient for wiring, so that the structure of the power distribution circuit board 100 is more compact and occupies less space.

[0057] In some embodiments, the first circuit region, the second circuit region and the third circuit region are electrically connected through the inside of the power distribution circuit board 100; the first circuit region, the second circuit region and the third circuit region are each provided with an RS485 communication port, wherein the RS485 communication port adopts differential signal transmission, which can effectively resist electromagnetic interference and signal attenuation, and the RS485 communication port is used to connect with a monitoring module of the energy storage system 500 to realize data transmission.

[0058] It can be understood that the RS485 communication port can be flexibly configured as a half-duplex or full-duplex mode, so as to realize the interconnection communication between the first circuit region, the second circuit region, the third circuit region and the monitoring module, and improve the flexibility and expandability of the power distribution circuit board 100.

[0059] As shown in Figure 3 , Figure 3 is a schematic view of an energy storage system 500 provided by an embodiment of the present application.

[0060] The embodiment of the present application also provides an energy storage system 500 comprising the foregoing power distribution circuit board 100. The energy storage system 500 can bring the beneficial effects of any one of the embodiments of the power distribution circuit board 100 described above, and the present embodiment will not be described here.

[0061] In some embodiments, the energy storage system 500 further comprises a central control cabinet 600, and the power distribution circuit board 100 is arranged in the central control cabinet 600. Specifically, the power distribution circuit board 100 in the embodiment of the present application can be directly fixed to the central control cabinet 600, or can be made into a cabinet type and arranged as a cabinet type in the central control room as a whole.

[0062] It should be noted that when the central control cabinet 600 is in a cabinet type, the cabinet shell leads out the power port corresponding to the three-phase load power supply module 200 through the first connector 230, leads out the power port corresponding to the single-phase load power supply module 300 through the second connector 330, and leads out the power port corresponding to the DC load power supply module 400 through the third connector 430, and the embodiment of the present application will make key parameter silk printing on the shell of the cabinet shell, so as to realize the differentiation of different modules.

[0063] The apparatus embodiments described above are only illustrative, and units described as separate components may or may not be physically separate, i.e., may be located in one place or distributed over multiple network nodes. Some or all of the modules can be selected to achieve the purposes of the embodiments according to actual needs.

[0064] It should be understood that, in the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that there are three cases of only A, only B, and A and B at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the front and rear associated objects. "At least one of the following" or the like means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0065] In several embodiments provided in the present application, it should be understood that the disclosed system and apparatus can be implemented in other ways. For example, the apparatus embodiments described above are only illustrative, such as the division of units, which is only a logical functional division, and actual implementation can have another division manner, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed units can be indirect coupling or communication connection through some interfaces, apparatuses or units, which can be electrical, mechanical or other forms. The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place or distributed over multiple network units. Some or all of the units can be selected to achieve the purposes of the embodiments according to actual needs.

[0066] It should also be understood that the various embodiments provided by the embodiments of the present application can be combined in any way to achieve different technical effects.

[0067] The above is a specific description of the preferred embodiments of the present application, but the present application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A power distribution circuit board for an energy storage system, characterized by, The power distribution circuit board comprises: a three-phase load power supply module comprising a first AC copper bar, a first on-board fuse base, and a first connector, the first connector being coupled to the first AC copper bar through the first on-board fuse base, and the first connector being used for connecting a three-phase AC electrical device; a single-phase load power supply module comprising a second AC copper bar, a second on-board fuse base, and a second connector, the second connector being coupled to the second AC copper bar through the second on-board fuse base, and the second connector being used for connecting a single-phase AC electrical device; a DC load power supply module comprising a DC copper bar, an electric fuse, and a third connector, the third connector being coupled to the DC copper bar through the electric fuse, and the third connector being used for connecting a DC electrical device.

2. The power distribution circuit board of claim 1, wherein, The first on-board fuse base is fixed to the power distribution circuit board by its own pin to be coupled to the first AC copper bar and the corresponding first connector. The second on-board fuse base is fixed to the power distribution circuit board by its own pin to be coupled to the second AC copper bar and the corresponding second connector.

3. The power distribution circuit board of claim 2, wherein, The energy storage system further comprises a monitoring module; the first on-board fuse base comprises a first feedback contact, and the second on-board fuse base comprises a second feedback contact, and the first feedback contact and the second feedback contact are used for connecting signal acquisition pins of the monitoring module.

4. The power distribution circuit board of claim 1, wherein, The electric fuse comprises a microswitch and a control chip, a control pin of the control chip being connected to a control end of the microswitch, and two switch ends of the microswitch being coupled to the DC copper bar and the corresponding third connector, respectively.

5. The power distribution circuit board of claim 1, wherein, At least one of the first connector, the second connector, and the third connector is a pluggable connection terminal.

6. The power distribution circuit board of claim 1, wherein, The power distribution circuit board is a multi-layer board structure, and at least one of the first AC copper bar, the second AC copper bar, and the DC copper bar is arranged on an inner layer of the power distribution circuit board.

7. The power distribution circuit board of claim 1, wherein, The three-phase load power supply module is arranged in a first circuit area of the power distribution circuit board, the single-phase load power supply module is arranged in a second circuit area of the power distribution circuit board, and the DC load power supply module is arranged in a third circuit area of the power distribution circuit board; the first circuit area, the second circuit area, and the third circuit area are arranged in sequence along a length direction of the power distribution circuit board.

8. The power distribution circuit board of claim 7, wherein, The first circuit area, the second circuit area, and the third circuit area are electrically connected through an interior of the power distribution circuit board; the first circuit area, the second circuit area, and the third circuit area are each provided with an RS485 communication port, and the RS485 communication port is used for connecting the monitoring module of the energy storage system.

9. An energy storage system characterized by, The power distribution circuit board comprises any one of claims 1 to 8.

10. The energy storage system of claim 9, wherein, The energy storage system further comprises a central control cabinet, and the power distribution circuit board is arranged in the central control cabinet.

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