Energy storage cabinet and power converter

Abstract

Provided in the embodiments of the present application are an energy storage cabinet and a power converter. A plurality of external ports on each PCB of the power converter comprise a plurality of input ports used for electrically connecting to a power source. At least one input port among the plurality of input ports on each PCB is used for electrically connecting to a load, such that the at least one input port is electrically connected to both a power source end and a load end. Therefore, at least one external port can be removed from the power converter, such that while the size of the power converter remains unchanged, the arrangement distance between the remaining multiple external ports can be increased, thereby reducing the risk of sparking or arcing between the ports. In addition, since part of the current output by the power source is directly delivered to the load end, the current flowing through the at least one port can be reduced, thereby reducing the probability of a risk occurring at said port. In summary, the safety performance of the power converter can be improved.

Description

Energy storage cabinet and power converter

[0001] This application claims priority to Chinese Patent Application No. 202422573948.8, filed on October 23, 2024, entitled “Energy Storage Cabinet and Power Converter”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of power conversion, and more particularly to an energy storage cabinet and a power converter. Background Technology

[0003] The power converter in the related technology includes two ports, bat+ and bat-, for connecting to the power source, and three ports, Bus+, Bus- and N, for connecting to the load. The current flowing into the two ports, bat+ and bat-, is processed by the power conversion circuit in the power converter and then flows to the load through the three ports, Bus+, Bus- and N.

[0004] However, for power converters with high input power, the current flowing into the bat+ and bat- ports and the current flowing out of the Bus+, Bus-, and N ports are all very large. To ensure safety, the bat+ and bat- ports and the Bus+, Bus-, and N ports need to be sufficiently large to allow the current to pass safely. However, given the limited space in the power converter's port layout, it is difficult to make all ports large enough, which prevents the power converter from accepting large currents. Furthermore, with a fixed power converter size, large currents can easily cause electrical arcing or sparking between the ports, posing a safety risk during operation. Summary of the Invention

[0005] Embodiments of this application provide an energy storage cabinet and a power converter to improve the safety of the power converter.

[0006] In a first aspect, embodiments of this application provide an energy storage cabinet, which includes a cabinet body, a power converter disposed within the cabinet body, at least one battery cluster, and multiple wires. The at least one battery cluster includes multiple stacked battery packs. The power converter includes at least one PCB board and a power conversion circuit disposed on each of the at least one PCB board. Each PCB board includes multiple input ports, and the multiple input ports on each PCB board are electrically connected to a battery cluster via multiple wires. The multiple input ports on each PCB board include at least one first port, and the wire electrically connected to the at least one first port is used for electrical connection to an external load. The wire electrically connected to the at least one first port is used to receive the current output by the battery cluster, and a portion of the received current is transmitted to the power conversion circuit through the at least one first port, while another portion of the received current is transmitted to the external load through the wire electrically connected to the at least one first port.

[0007] In this embodiment, at least one first port is used to receive a portion of the current output from the power source and send it to the power conversion circuit. This means at least one first port simultaneously sends the current output from the power conversion circuit to the load, while the other portion of the current output from the power source is directly sent to the load. Thus, at least one first port serves as both an input port for receiving the current input from the power source and an output port for outputting current to the load. This design saves at least one output port used for electrical connection to an external load. With the power converter size remaining constant, the number of external ports is reduced, allowing for a greater spacing between multiple external ports, effectively reducing the risk of electrical arcing or sparking between them. Secondly, since the wire connected to at least one first port simultaneously connects the battery pack and the load, meaning the battery pack and load can be directly connected via the wire, only a portion of the current output from the battery pack enters the power conversion circuit through the first port. The other portion of the current output from the battery pack is directly sent to the load. In other words, only a portion of the current output from the battery pack is used to pass through the power conversion circuit and then output to the load to meet the transformation requirements. Since the first port only supplies a portion of the current output from the battery cluster to the power conversion circuit, the current pressure that the first port needs to withstand is less than the total current output from the battery cluster. This effectively reduces the danger of electrical arcing or sparking when current flows through the first port. Moreover, since the first port does not need to carry a large current, its size can be effectively reduced, which is beneficial for the miniaturization design of the power converter.

[0008] In some embodiments, at least one PCB board includes a first PCB board and a second PCB board, and at least one battery cluster includes a first battery cluster and a second battery cluster. A first port of the first PCB board is electrically connected to an output port of the second PCB board, and the first port of the first PCB board and the output port of the second PCB board have the same polarity. A first port of the second PCB board is electrically connected to an output port of the first PCB board, and the first port of the second PCB board has the same polarity. The first port on the first PCB board and the first port on the second PCB board have opposite polarities.

[0009] In this embodiment, since the wires connected to the first port of the first PCB board are electrically connected to the output port of the second PCB board, and the wires connected to the first port of the second PCB board are electrically connected to the output port of the first PCB board, and since the first port of the first PCB board can also serve as the output port of the first PCB board, and the first port of the second PCB board can also serve as the output port of the second PCB board, the power conversion circuits on the first PCB board and the power conversion circuits on the second PCB board can be connected in parallel, making it suitable for energy storage cabinets with higher power conversion requirements. Furthermore, because the power conversion circuits on the first and second PCB boards are connected in parallel, if one PCB board fails, the other PCB board of the power converter can continue to operate, avoiding direct shutdown of the power converter.

[0010] In some embodiments, the plurality of input ports on the first PCB board include a first positive input port and a first negative input port, wherein the first positive input port or the first negative input port is a first port. The plurality of input ports on the second PCB board include a second positive input port and a second negative input port, wherein the second positive input port or the second negative input port is a first port. A wire electrically connected to the first port on the first PCB board is electrically connected to an output port on the second PCB board. A wire electrically connected to the first port on the second PCB board is electrically connected to an output port on the first PCB board.

[0011] This embodiment directly utilizes the existing positive and negative input ports on the first and second PCBs, thus avoiding the need for connection ports on both PCBs to connect the power conversion circuits on the first and second PCBs. This saves on both the positive and negative connection ports on the first and second PCBs, effectively reducing the number of ports on both boards and the wiring within the power converter. This not only reduces the risk of electrical arcing or sparking by reducing the number of ports prone to this problem, but also facilitates miniaturization of the power converter. Alternatively, it allows for increased spacing between ports without changing the overall size of the power converter, further reducing the risk of electrical arcing or sparking.

[0012] In some embodiments, the first PCB board and the second PCB board are arranged in the height direction of the power converter. In the height direction of the power converter, the output port of the second PCB board is arranged opposite to the first port on the first PCB board, and the output port of the first PCB board is arranged opposite to the first port on the second PCB board.

[0013] In this embodiment, since the output ports of the second PCB board and the first ports of the first PCB board are arranged opposite each other along the height direction of the power converter, it is convenient to connect the wires electrically connected to the output ports of the second PCB board to the first ports of the first PCB board. It is also convenient to connect the wires electrically connected to the output ports of the first PCB board to the first ports of the second PCB board.

[0014] In some embodiments, the conductor is a copper busbar. The copper busbar electrically connected to the first port includes a first portion extending along the height direction of the power converter and a plurality of second portions spaced along the height direction of the power converter on the first portion. The extension direction of the plurality of second portions is perpendicular to the extension direction of the first portion. The plurality of second portions are used to plug into and electrically connect to the first port or the output port of the first PCB board or the output port of the second PCB board.

[0015] In this embodiment, since the copper busbar is plugged into and electrically connected to the first port, the output port of the first PCB board, or the output port of the second PCB board through the second part, it not only facilitates the assembly and connection of the copper busbar with the first port, the output port of the first PCB board, or the output port of the second PCB board, thus facilitating the assembly and connection of the power converter, but also reduces the loss when the current flows through the copper busbar due to its low resistance.

[0016] In some embodiments, the first positive input port is a first port on a first PCB board, and multiple second portions of the copper busbar electrically connected to the first port on the first PCB board are respectively plugged into and electrically connected to the positive output terminal of the first battery cluster, the first positive input port, and the output port of the second PCB board. The second negative input port is a first port on a second PCB board, and multiple second portions of the copper busbar electrically connected to the first port on the second PCB board are respectively plugged into and electrically connected to the negative output terminal of the second battery cluster, the second negative input port, and the output port of the first PCB board.

[0017] In this embodiment, since multiple second parts of the copper busbar electrically connected to the first port on the first PCB board are respectively plugged into and electrically connected to the positive output terminal of the first battery cluster, the first positive input port, and the output port of the second PCB board, the current flowing through the first port, the first positive input port, and the output port of the second PCB board can be effectively reduced, thereby effectively reducing the size of the first port, the first positive input port, and the output port of the first PCB board. Similarly, since multiple second parts of the copper busbar electrically connected to the first port on the second PCB board are respectively plugged into and electrically connected to the negative output terminal of the second battery cluster, the second negative input port, and the output port of the first PCB board, the size of the first port, the second negative input port, and the output port of the first PCB board can be effectively reduced.

[0018] In some embodiments, the power conversion circuit on the first PCB board and the power conversion circuit on the second PCB board are connected in parallel.

[0019] In this embodiment, since the first PCB board and the second PCB board are connected in parallel, the normal operation of the other PCB board will not be affected by the damage of one PCB board.

[0020] In some embodiments, a multi-stage power conversion circuit is provided on the first PCB board, and the multi-stage power conversion circuits on the first PCB board are connected in series. A multi-stage power conversion circuit is provided on the second PCB board, and the multi-stage power conversion circuits on the second PCB board are connected in series. A wire is used to connect the circuit after the multi-stage power conversion circuits on the first PCB board are connected in parallel to the circuit after the multi-stage power conversion circuits on the second PCB board are connected in parallel. The output ports of the first PCB board and the output ports of the second PCB board are used to electrically connect the parallel circuit to the load.

[0021] In this embodiment, since the first PCB board and the second PCB board are connected in parallel, the normal operation of the other PCB board will not be affected by the failure of one PCB board. Furthermore, the parallel connection of the series-connected circuits of the multi-stage power conversion circuits on the first PCB board and the series-connected circuits of the multi-stage power conversion circuits on the second PCB board utilizes the wires on the cabinet, i.e., the external wires of the power converter, thus avoiding excessive wires inside the power converter and reducing the safety risks associated with wires. Moreover, the parallel connection of the series-connected circuits of the multi-stage power conversion circuits on the first PCB board and the series-connected circuits of the multi-stage power conversion circuits on the second PCB board utilizes the existing ports on both PCB boards, thus avoiding the need for parallel ports on both PCB boards, saving the number of ports, and facilitating the miniaturization design of the power converter while improving its safety.

[0022] In some embodiments, the first PCB board further includes a first ground port, and the second PCB board further includes a second ground port. The first ground port and the second ground port are electrically connected by a wire, and the wire electrically connected to the first ground port or the second ground port is used to electrically connect to the ground port of an external load.

[0023] In this embodiment, since the power converter necessarily has an external grounding port, this embodiment utilizes this external grounding port and adds another external grounding port. The first grounding port on the first PCB and the second grounding port on the second PCB can be electrically connected through an external wire to realize the parallel connection of the grounding terminal of the power conversion circuit on the first PCB and the grounding terminal of the power conversion circuit on the second PCB. This avoids the need to additionally set ports on the first PCB and the second PCB for electrically connecting the grounding terminal of the power conversion circuit on the first PCB and the grounding terminal of the power conversion circuit on the second PCB.

[0024] In some embodiments, at least one PCB board includes a PCB board with multiple input ports including a positive input port and a negative input port, the positive input port or the negative input port being a first port, the PCB board also including a ground port and an output port, the wires electrically connected to the first port being used to electrically connect to the battery cluster and an external load respectively, the ground port and the output port being electrically connected to the external load respectively through wires.

[0025] In this embodiment, since the positive or negative input port is the first port, and the first port is both the input and output port of the power converter, one output port for electrical connection to an external load can be saved. With the power converter size remaining unchanged, the number of external ports is reduced, allowing for a suitable increase in the spacing between them, thus effectively reducing the risk of electrical arcing or sparking between the external ports. Secondly, since the wire connected to the first port simultaneously connects the battery pack and the load, meaning the battery pack and load can be directly connected via the wire, only a portion of the current output from the battery pack enters the power conversion circuit through the first port. The other portion of the current output from the battery pack is directly delivered to the load. In other words, only a portion of the current output from the battery pack is used to pass through the power conversion circuit and is then output to the load to meet the transformation requirements. Since this port only supplies a portion of the current output from the battery cluster to the power conversion circuit, the current pressure that the first port needs to withstand is less than the total current output from the battery cluster. This effectively reduces the danger of electrical arcing or sparking when current flows through the first port. Moreover, since this port does not need to carry a large current, the size of the first port can be effectively reduced, which is beneficial for the miniaturization design of the power converter.

[0026] In some embodiments, multiple wires are copper busbars, multiple wires are fixed on the rear wall of the cabinet, multiple input ports are located on the side of the power converter facing the rear wall, multiple wires are plugged into multiple input ports and electrically connected to the input ports.

[0027] In this embodiment, a wire is fixed to the rear wall of the cabinet, and multiple input ports are located on the side of the power converter facing the rear wall. This allows the power converter to be connected to the wire when it is inserted into the cabinet, reducing the difficulty of connecting the power converter.

[0028] Secondly, embodiments of this application provide a power converter, which includes at least one PCB board and a power conversion circuit disposed on each of the at least one PCB board. Each PCB board includes multiple input ports, which are respectively used to be electrically connected to a power source via wires. Among the multiple input ports, there is at least one first port. The wire electrically connected to the at least one first port is used to be electrically connected to a load. The wire electrically connected to the at least one first port is used to receive the current output by the power source and to transmit a portion of the received current to the power conversion circuit through the at least one first port. The other portion of the received current is transmitted to the load through the wire electrically connected to the at least one first port.

[0029] In this embodiment, similar to the power converter in the energy storage cabinet mentioned earlier, the power converter in this embodiment can also reduce the number of external ports by setting a first port. This reduces the distance between multiple external ports, lowering the risk of electrical arcing or sparking between them. Similarly, since the first port only supplies a portion of the current output from the battery cluster to the power conversion circuit, it does not need to carry a large current, effectively reducing its size and facilitating miniaturization of the power converter.

[0030] In some embodiments, at least one PCB board includes a first PCB board and a second PCB board. A first port on the first PCB board is electrically connected to an output port on the second PCB board, and the first port on the first PCB board and the output port on the second PCB board have the same polarity. A first port on the second PCB board is electrically connected to an output port on the first PCB board, and the first port on the second PCB board and the output port on the first PCB board have the same polarity. Alternatively, the first port on the first PCB board and the first port on the second PCB board have opposite polarities.

[0031] In this embodiment, since the first positive input port or the first negative input port is the first port and the second positive input port or the second negative input port is the first port, the power conversion circuit on the first PCB board and the power conversion circuit on the second PCB board can be connected in parallel. When one of the PCB boards is damaged, the other PCB board of the power converter continues to work, avoiding the direct shutdown of the power converter.

[0032] In some embodiments, the plurality of input ports on the first PCB board include a first positive input port and a first negative input port, wherein the first positive input port or the first negative input port is a first port. The plurality of input ports on the second PCB board include a second positive input port and a second negative input port, wherein the second positive input port or the second negative input port is a first port. A wire electrically connected to the first port on the first PCB board is electrically connected to an output port on the second PCB board. A wire electrically connected to the first port on the second PCB board is electrically connected to an output port on the first PCB board.

[0033] This embodiment directly utilizes the existing positive and negative input ports on the first and second PCBs, effectively reducing the number of ports on both boards. It also reduces the number of cables within the power converter used to connect the power conversion circuits on the first and second PCBs. This not only reduces the risk of electrical arcing or sparking in the power converter by decreasing the number of ports prone to this problem, but also facilitates miniaturization of the power converter. Alternatively, it allows for increased spacing between ports without changing the overall size of the power converter, further reducing the risk of electrical arcing or sparking between ports.

[0034] In some embodiments, the first PCB board and the second PCB board are arranged in the height direction of the power converter. In the height direction of the power converter, the output port of the second PCB board is arranged opposite to the first port on the first PCB board, and the output port of the first PCB board is arranged opposite to the first port on the second PCB board.

[0035] In this embodiment, since the output ports of the second PCB board and the first ports of the first PCB board are arranged opposite each other along the height direction of the power converter, it is convenient to connect the wires electrically connected to the output ports of the second PCB board to the first ports of the first PCB board. It is also convenient to connect the wires electrically connected to the output ports of the first PCB board to the first ports of the second PCB board.

[0036] In some embodiments, the conductor is a copper busbar. The copper busbar electrically connected to the first port includes a first portion extending along the height direction of the power converter and a plurality of second portions spaced along the height direction of the power converter on the first portion. The extension direction of the plurality of second portions is perpendicular to the extension direction of the first portion. The plurality of second portions are used to plug into and electrically connect to the first port or the output port of the first PCB board or the output port of the second PCB board.

[0037] In this embodiment, since the copper busbar is plugged into and electrically connected to the first port, the output port of the first PCB board, or the output port of the second PCB board through the second part, it not only facilitates the assembly and connection of the copper busbar with the first port, the output port of the first PCB board, or the output port of the second PCB board, thus facilitating the assembly and connection of the power converter, but also reduces the loss when the current flows through the copper busbar due to its low resistance.

[0038] In some embodiments, the first positive input port is a first port on a first PCB board, and multiple second portions of the wires electrically connected to the first port on the first PCB board are respectively plugged into and electrically connected to the positive output terminal of the first battery cluster, the first positive input port, and the output port of the second PCB board. The second negative input port is a first port on a second PCB board, and multiple second portions of the wires electrically connected to the first port on the second PCB board are respectively plugged into and electrically connected to the negative output terminal of the second battery cluster, the second negative input port, and the output port of the first PCB board.

[0039] In this embodiment, since multiple second portions of the wires electrically connected to the first port on the first PCB board are respectively plugged into and electrically connected to the positive output terminal of the first battery cluster, the first positive input port, and the output port of the second PCB board, the current flowing through the first port, the first positive input port, and the output port of the second PCB board can be effectively reduced, thereby effectively reducing the size of the first port, the first positive input port, and the output port of the first PCB board. Similarly, since multiple second portions of the wires electrically connected to the first port on the second PCB board are respectively plugged into and electrically connected to the negative output terminal of the second battery cluster, the second negative input port, and the output port of the first PCB board, the size of the first port, the second negative input port, and the output port of the first PCB board can be effectively reduced.

[0040] In some embodiments, the power conversion circuit on the first PCB board and the power conversion circuit on the second PCB board are connected in parallel.

[0041] In this embodiment, since the first PCB board and the second PCB board are connected in parallel, the normal operation of the other PCB board will not be affected by the damage of one PCB board.

[0042] In some embodiments, the first PCB board further includes a first ground port, and the second PCB board further includes a second ground port. The first ground port and the second ground port are electrically connected by a wire, and the wire electrically connected to the first ground port or the second ground port is used to electrically connect to the ground port of the load.

[0043] In this embodiment, since the power converter necessarily has an external grounding port, this embodiment utilizes this external grounding port and adds another external grounding port. The first grounding port on the first PCB and the second grounding port on the second PCB can be electrically connected through an external wire to realize the parallel connection of the grounding terminal of the power conversion circuit on the first PCB and the grounding terminal of the power conversion circuit on the second PCB. This avoids the need to additionally set ports on the first PCB and the second PCB for electrically connecting the grounding terminal of the power conversion circuit on the first PCB and the grounding terminal of the power conversion circuit on the second PCB.

[0044] In some embodiments, at least one PCB board includes a PCB board with multiple input ports including a positive input port and a negative input port, the positive input port or the negative input port being a first port. The PCB board also includes a ground port and an output port. The wires electrically connected to the first port are used to electrically connect to a power source and a load, respectively. The ground port and the output port are electrically connected to an external load through wires, respectively.

[0045] In this embodiment, since the positive input port or the negative input port is the first port, and the first port is both the input port and the output port of the power converter, one output port for electrical connection with an external load can be saved. With the size of the power converter remaining unchanged, the number of multiple external ports is reduced, and the spacing between multiple external ports can be appropriately increased, thereby effectively reducing the risk of electrical arcing or arcing between multiple external ports. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0047] Figure 1 is a structural diagram of the left wall of the hidden cabinet of an energy storage cabinet provided in an embodiment of this application;

[0048] Figure 2 is a simplified structural diagram of a power converter in the related technology;

[0049] Figure 3a is a schematic diagram of the connection of the power converter in the energy storage cabinet in the embodiment of Figure 1;

[0050] Figure 3b is a diagram showing the current flow of the wire connected to the first port in the embodiment of Figure 3a;

[0051] Figure 4 is an exploded view of the power converter and conductors in Figure 1.

[0052] Figure 5 is a partial structural schematic diagram of the power converter in the embodiment of Figure 1;

[0053] Figure 6 is a schematic diagram of the control logic of a power converter provided in an embodiment of this application;

[0054] Figure 7 is a simplified front view of another power converter provided in an embodiment of this application;

[0055] Figure 8 is a simplified front view of another power converter provided in an embodiment of this application.

[0056] Explanation of reference numerals in the attached diagram: X, length direction of the energy storage cabinet; Y, depth direction of the energy storage cabinet; Z, height direction of the energy storage cabinet; Z, height direction of the power converter; 100, energy storage cabinet; 10, cabinet body; 11, top wall; 12, bottom wall; 14, right wall; 15, front wall; 16, rear wall; 20, battery cluster; 20a, first battery cluster; 20b, second battery cluster; 21, battery pack; 30. Power converter; 31. PCB board; 31a. First PCB board; 31b. Second PCB board; 321. Input port; 3210. First port; 322. Positive input port; 3221. First positive input port; 3222. Second positive input port; 323. Negative input port; 3231. First negative input port; 3232. Second negative input port; 324. Output port; 3241. First output port; 3242. Second output port; 325. Grounding port; 326. First grounding port; 327. Second grounding port; 328. Connection port; 33. Housing; 331. Top wall; 332. Bottom wall; 40. Cluster control box; 41. Positive output terminal of cluster control box; 42. Negative output terminal of cluster control box; 50. Wire; 51. Copper busbar; 511. First part; 512. Second part; 60. Load external interface; 61. Positive interface; 62. Negative interface; 63. Grounding interface. Detailed Implementation

[0057] The following section will first explain some of the terms used in the embodiments of this application.

[0058] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0059] In this specification, terms such as "vertical" are explained.

[0060] Perpendicularity: The perpendicularity defined in this application is not limited to an absolute perpendicular intersection (with an included angle of 90 degrees). It is permissible for non-absolute perpendicular intersections caused by factors such as assembly tolerances, design tolerances, and structural flatness. It is permissible for errors within a small angular range, such as an assembly error range of 80 to 100 degrees, which can all be understood as a perpendicular relationship.

[0061] With rapid socio-economic growth, the data center industry is booming globally, and its development and construction are poised for a period of rapid expansion. Data centers are a strategic resource as important as human and natural resources. In the information age, only by utilizing data on a large scale and with flexibility can we better understand and leverage it.

[0062] Data centers typically consist of multiple modules, including server racks, power supply and distribution systems, cooling systems, intelligent monitoring systems, and fire protection systems. The power supply and distribution system includes energy storage cabinets, which are used to supply power to the server racks and other modules.

[0063] Figure 1 is a structural schematic diagram of the hidden cabinet 10 of an energy storage cabinet 100 provided in an embodiment of this application, showing the structure behind the left wall. The energy storage cabinet 100 in the embodiment of Figure 1 can be applied to the power supply and distribution system in a data center. It is understood that the energy storage cabinet 100 in this application can also be an energy storage cabinet 100 used in other scenarios, such as an industrial and commercial energy storage cabinet 100, a containerized energy storage cabinet 100, etc. It is understood that the energy storage cabinet 100 in the embodiment of this application can not only be used to receive and store external electrical energy, but also to transmit the stored electrical energy to external loads.

[0064] Referring to Figure 1, the energy storage cabinet 100 includes a cabinet 10 and a battery cluster 20, a power converter 30, and a cluster control box 40 located within the cabinet 10. The battery cluster 20 includes multiple battery packs 21 connected in series, and the power converter 30 is used to regulate the voltage of the battery cluster 20.

[0065] The cabinet 10 includes a top wall 11 and a bottom wall 12 opposite each other along the height direction Z of the energy storage cabinet 100, a left wall (not shown in the figure) and a right wall 14 opposite each other along the length direction X of the energy storage cabinet 100, and a front wall 15 and a rear wall 16 opposite each other along the depth direction Y of the energy storage cabinet 100. The front wall 15, the rear wall 16, the left wall and the right wall 14 are located between the top wall 11 and the bottom wall 12. The top wall 11, the bottom wall 12, the front wall 15, the rear wall 16, the left wall and the right wall 14 together form the inner cavity of the cabinet 10. The battery cluster 20, the power converter 30 and the cluster control box 40 are located in the inner cavity of the cabinet 10.

[0066] Understandably, the front wall 15 is usually set as a cabinet door, or a portion of the front wall 15 is set as a cabinet door, to facilitate assembly and maintenance.

[0067] The cluster control box 40 is electrically connected between the battery cluster 20 and the power converter 30, for example, through a wire 50. The cluster control box 40 is used to control the charging and discharging of the battery cluster 20 and to ensure the safe charging and discharging performance of the battery cluster 20.

[0068] However, when the input and output power of the energy storage cabinet 100 in the related technology is large, the safety performance of the power converter 30 of the energy storage cabinet 100 will be greatly threatened. This is because the energy storage cabinet 100 in the related technology requires a large current to flow through the power converter 30 when it is working. This means that the input and output ports 324 of the power converter 30 and the power conversion circuit on the PCB (Printed Circuit Board) need to carry a large current, which greatly increases the probability of arcing and electrical sparking in the power converter 30, thus greatly threatening the safety of the power converter 30.

[0069] Figure 2 is a simplified structural diagram of a power converter 30 in the related art.

[0070] Referring to Figure 2, a power converter 30 in the related art includes multiple PCB boards 31, each with a power conversion circuit. These circuits are connected in series within the power converter 30 via connection ports 328. Multiple battery clusters 20 are connected to one PCB board 31a, and then output to the load via another PCB board 31b. Taking a power converter 30 with two PCB boards 31 as an example, and two battery clusters 20 as examples, one PCB board 31a needs to have four input ports 321 (bat1+, bat1-, bat2+, bat2-) for electrical connection with the two battery clusters 20, and three connection ports 328 for series connection with the power conversion circuit on the other PCB board 31b. The other PCB board 31b needs to have three output ports 324 (Bus+, Bus+, N) for connection to the load, and three connection ports 328 for series connection with the power conversion circuit on the first PCB board 31a. Therefore, the power converter 30 in the relevant technology needs to have at least thirteen ports and at least three cables.

[0071] This design has at least the following problems:

[0072] 1. Multiple connection ports 328 for connecting different PCBs 31 in series are required on the PCB board 31. For example, each PCB board 31 needs to have three connection ports 328: positive, negative, and N. Then, the connection ports 328 on different PCBs 31 need to be connected together by cables or copper busbars 51. Since the power converter 30 needs to be laid out with multiple connection ports 328 and copper busbars 51 or cables for connecting to the connection ports 328, it needs to occupy a large space, resulting in a large size of the power converter 30. If the size of the power converter 30 is too large, the distance between different ports will be too close, which will easily cause arcing and electrical sparking.

[0073] 2. The large current input to the battery cluster 20 will pass through all the input ports 321 of the power converter 30, the connection ports 328 and the output ports 324 on each PCB board 31, etc. In order for each port to be able to carry a large current, each port needs to be made large enough. However, this will lead to a further increase in the size of the power converter 30, and will also lead to a further reduction in the distance between different ports, which will easily cause arcing and electrical sparking problems.

[0074] 3. Since multiple PCBs 31 are connected in series, if one of the PCBs 31 is damaged, the power conversion circuits on all PCBs 31 will be disconnected and unable to work, that is, the power converter 30 will be completely unable to work.

[0075] Figure 3a is a connection diagram of the power converter in the energy storage cabinet 100 in the embodiment of Figure 1; Figure 3b is a current flow diagram of the wire 50 connected to the first port 3210 in the embodiment of Figure 3a; Figure 4 is an exploded structural diagram of the power converter 30 and the wire 50 in Figure 1; Figure 5 is a partial structural diagram of the power converter 30 in the embodiment of Figure 1.

[0076] To improve the safety performance of the power converter 30 when carrying large currents and to facilitate its miniaturization, referring to Figures 3a and 4, the energy storage cabinet 100 also includes multiple wires 50. The cabinet 10 is provided with multiple load external interfaces 60 for electrical connection to external loads. It is understood that the multiple load external interfaces 60 may include a positive interface 61, a negative interface 62, and a grounding interface 63. The wires 50 are used to connect the power converter 30 and the battery cluster 20, and to connect the power converter 30 and the load external interfaces 60, so that the power converter 30 is electrically connected between the battery cluster 20 and the load external interfaces 60.

[0077] For ease of connection, in some implementations, the conductor 50 is a copper busbar 51, such as a hard copper busbar 51 or a soft copper busbar 51.

[0078] In this embodiment, the energy storage cabinet 100 primarily reduces the load on the power converter 30 by decreasing the current flowing from the battery cluster 20 into the power converter 30, thereby improving the safety of the power converter 30. Referring to Figures 3a-5, in some embodiments, the power converter 30 includes a housing 33 and at least one PCB board 31 disposed within the housing 33. The power converter 30 also includes a power conversion circuit and multiple external ports disposed on each of the at least one PCB board 31. Since each PCB board 31 is provided with a power conversion circuit, each PCB board 31 has a power conversion function. It should be noted that the power conversion circuit in this application can be either a voltage conversion circuit or a current conversion circuit. For example, the power converter 30 can be used for DC-DC (District of Columbia Department of Corrections) conversion and also for DC-AC (Domestic Communications Assistance Center) conversion.

[0079] Multiple external ports on each PCB board 31 are electrically connected to the power conversion circuit. Specifically, these external ports can be electrically connected to the power conversion circuit via lines on the PCB board 31. These external ports are used to electrically connect the power conversion circuit between the battery cluster 20 and an external load. The electrical energy output from the battery cluster 20 is converted by the power conversion circuit and then delivered to the external load. Alternatively, the external load can be replaced by an external power source, which supplies electrical energy to the power conversion circuit, converts the energy, and then delivers it to the battery cluster 20 for storage.

[0080] To enable the power conversion circuitry to be electrically connected between the battery cluster 20 and an external load, referring to Figures 3a and 5, in some embodiments, multiple external ports on each PCB board 31 include multiple input ports 321 for electrical connection to a power source (such as the battery cluster 20). The multiple input ports 321 on each PCB board 31 are electrically connected to the power source via wires 50 (such as copper busbars 51).

[0081] In some implementations, multiple external ports of the power converter 30 are duckbill ports. Duckbill ports have a simple structure and are easy to install.

[0082] Referring to Figures 3a and 3b, in some embodiments, each PCB board 31 includes at least one first port 3210 among the plurality of input ports 321. The first port 3210 is used for electrical connection to a load, that is, the wire 50 electrically connected to the first port 3210 is used for electrical connection to both the battery cluster 20 and the load. In other words, the wire 50 connected to at least one first port 3210 among the plurality of input ports 321 on each PCB board 31 is used for electrical connection to a load.

[0083] Based on this, at least one first port 3210 is used to receive a portion of the current output from the power source and transmit it to the power conversion circuit. The first port 3210 is also used to transmit the current output from the power conversion circuit to the load, while another portion of the current output from the power source is directly transmitted to the load. Specifically, the copper busbar 51 electrically connected to at least one first port 3210 is used to receive the current output from the battery cluster 20, and transmit a portion of the received current to the power conversion circuit through at least one first port 3210. The other portion of the received current is transmitted to the external load through the copper busbar 51 electrically connected to at least one first port 3210.

[0084] In this embodiment, at least one first port 3210 can be used to receive current input from the power source, just like the input port 321, and also to output current to the load, just like the output port 324. This design offers at least the following advantages: First, since at least one first port 3210 serves as both an input port and an output port of the power converter 30, one output port for electrical connection to an external load can be saved. With the size of the power converter 30 remaining unchanged, the number of external ports is reduced, allowing for a more appropriate increase in the spacing between multiple external ports, thereby effectively reducing the risk of electrical arcing or sparking between multiple external ports. Secondly, since the wire 50 connected to at least one first port 3210 simultaneously connects the battery cluster 20 and the load, meaning the battery cluster 20 and the load can be directly connected via the wire 50, only a portion of the current output from the battery cluster 20 enters the power conversion circuit through the first port 3210. The other portion of the current output from the battery cluster 20 is directly supplied to the load. In other words, only a portion of the current output from the battery cluster 20 is used to pass through the power conversion circuit and then output to the load to meet the transformation requirements. Because the first port 3210 only supplies a portion of the current output from the battery cluster 20 to the power conversion circuit, the current pressure that the first port 3210 needs to withstand is less than the total current output from the battery cluster 20. This effectively reduces the danger of electrical sparking or arcing when current flows through the first port 3210. Moreover, since the first port 3210 does not need to carry a large current, its size can be effectively reduced, which is beneficial for the miniaturization design of the power converter 30.

[0085] It should be noted that at least one first port 3210 of the plurality of input ports 321 on each PCB board 31 is used for electrical connection with the load, which can be explained in at least the following two cases, taking the power source as battery cluster 20 as an example.

[0086] The first type involves a PCB board 31 that needs to connect to a battery cluster 20. The PCB board 31 has multiple external ports, including two input ports 321 for electrical connection to the battery cluster 20. These two input ports 321 are a positive input port 322 and a negative input port 323. One of the positive and negative input ports 322 and 323 is a first port 3210, which is used for electrical connection to a load. The other port is not used for direct connection to a load. The PCB board 31 also includes an output port 324 for electrical connection to an external load (load external interface 60). In some embodiments, the positive input port 322 is the first port 3210. The output port 324 and the positive input port 322 together serve as the output terminal of the PCB board 31, electrically connected to the load external interface 60. In some implementations, the negative input port 323 is the first port 3210, and the output port 324 and the negative input port 323 together serve as the output terminal of the PCB board 31 and are electrically connected to the load external interface 60.

[0087] The second scenario involves a PCB board 31 that needs to connect multiple battery clusters 20, such as two battery clusters 20. In this case, the PCB board 31 has two parallel power conversion circuits for electrical connection to the two battery clusters 20. Specifically, the multiple external ports of the PCB board 31 include four input ports 321, namely two pairs of positive input ports 322 and negative input ports 323. The two positive input ports 322 are electrically connected to each other through lines on the PCB board 31, and the two negative input ports 323 are electrically connected to each other through lines on the PCB board 31, thereby realizing the parallel connection between the two power conversion circuits. In this case, each pair of positive input ports 322 and negative input ports 323 has an interface called a first port 3210 for electrical connection to an external load (load external interface 60). That is, in this case, two of the four input ports 321 are first ports 3210 for electrical connection to the load external interface 60.

[0088] It should also be noted that the multiple input ports 321 are not directly connected to the battery cluster 20, but are electrically connected to the cluster control box 40 between the multiple input ports 321 and the battery cluster 20 to facilitate the control of the battery cluster 20.

[0089] Referring to Figures 3a-5, in some embodiments, the power converter 30 includes two PCB boards 31. For ease of description, the two PCB boards 31 are designated as a first PCB board 31a and a second PCB board 31b. The first PCB board 31a has a general power conversion circuit, which is electrically connected to a battery cluster 20. Similarly, the second PCB board 31b has a general power conversion circuit, which is also electrically connected to a battery cluster 20. For ease of description, the battery cluster 20 electrically connected to the first PCB board 31a is designated as the first battery cluster 20a, and the battery cluster 20 electrically connected to the second PCB board 31b is designated as the second battery cluster 20b.

[0090] Referring to Figures 3a-5, in some embodiments, the multiple input ports 321 on the first PCB board 31a include a first positive input port 3221 and a first negative input port 3231. For ease of description, the first positive input port 3221 is designated as the bat(Battery)1+ port, and the first negative input port 3231 is designated as the bat1- port. The bat1+ and bat1- ports are used for electrical connection with the first power source (first battery cluster 20a). Specifically, it can be electrically connected to the output terminal of the cluster control box 40, which is electrically connected to the first battery cluster 20a.

[0091] The multiple external ports on the first PCB board 31a also include a first output port 3241 for electrical connection to an external load.

[0092] Referring to Figures 3a-5, in some embodiments, the multiple input ports 321 on the second PCB board 31b include a second positive input port 3222 and a second negative input port 3232. For ease of description, the first positive input port 322 is designated as the bat2+ port, and the second negative input port 3232 is designated as the bat2- port. The bat2+ and bat2- ports are used for electrical connection with the second power source (second battery cluster 20b). Specifically, they can be electrically connected to the output terminal of the cluster control box 40, which is electrically connected to the second battery cluster 20b.

[0093] The multiple external ports on the second PCB board 31b also include a second output port 3242 for electrical connection to an external load.

[0094] Referring to Figures 3a-5, in some embodiments, a grounding port 325 is also provided on the first PCB board 31a or the second PCB board 31b. For ease of description, the grounding port 325 is set as the N port.

[0095] In this embodiment, the power converter 30 uses a first output port 3241, a second output port 3242, and an N port as its output terminals for electrical connection to an external load. Specifically, it is electrically connected to the load external interface 60 located on the cabinet 10. It can be understood that the first output port 3241, the second output port 3242, and the N port are respectively connected to the positive interface 61, the negative interface 62, and the ground interface 63 on the load external interface 60. For example, as shown in Figure 3a, in some embodiments, the second output port 3242 is a positive output port for electrical connection to the positive interface 61 of the load external interface 60, and the first output port 3241 is a negative output port for electrical connection to the negative interface 62 of the load external interface 60. The positive output port is represented by the Bus+ port, and the negative output port is represented by the Bus- port. Since the first output port 3241, the second output port 3242 and the N port are used as the output terminals of the power converter 30 for electrical connection with an external load, the current converted by the power converter 30 can be delivered to the load.

[0096] Referring to Figure 3a, in order to reduce the number of external ports and reduce the current carried by the external ports, in some embodiments, the bat1+ port is the first port 3210. The bat1+ port and the Bus+ port are electrically connected by a wire 50, for example, by a copper busbar 51 provided in the cabinet 10. That is, the wire 50 connected to the bat1+ port is electrically connected to the Bus+ port.

[0097] The bat2-port is the first port 3210. The bat2-port and the Bus-port are electrically connected by a wire 50, for example, by a copper busbar 51 located in the cabinet 10. That is, the wire 50 connected to the bat2-port is electrically connected to the Bus-port.

[0098] In this embodiment, since the wire 50 connected to the bat1+ port is electrically connected to the Bus+ port, and the wire 50 connected to the bat2- port is electrically connected to the Bus- port, and the bat1+ port can also serve as an output port of the first PCB board 31, and the bat2- port can also serve as an output port of the second PCB board 31b, by electrically connecting the bat1+ port and the Bus+ port through the wire 50, and by electrically connecting the bat2- port and the Bus- port through the wire 50, the power conversion circuit on the first PCB board 31a and the power conversion circuit on the second PCB board 31b can be connected in parallel, which is suitable for energy storage cabinets 100 with greater power conversion requirements. Moreover, since the power conversion circuit on the first PCB board 31a and the power conversion circuit on the second PCB board 31b are connected in parallel, the other PCB board 31 of the power converter 30 can continue to work when one of the PCBs fails, avoiding direct shutdown of the power converter 30.

[0099] Furthermore, compared to the embodiment in Figure 2, the power converter 30 in this embodiment can effectively reduce the number of ports on the PCB board 31. Specifically, since the bat1+ port is the first port 3210, and the wire 50 connected to the first port 3210 is electrically connected to the Bus+ port, the first port 3210 and the Bus- port on the first PCB board 31a can be used as output ports of the first PCB board 31a for electrical connection with the load external interface 60. The wire 50 connected to the first port 3210 on the second PCB board 31b is electrically connected to the Bus- port, so the first port 3210 and the Bus+ port on the second PCB board 31b can be used as output ports of the second PCB board 31b for electrical connection with the load external interface 60. Furthermore, the power conversion circuits on the first PCB board 31a and the second PCB board 31b can be connected in parallel via wires 50 outside the power converter 30. Since this embodiment directly utilizes the existing positive input port 322 and negative input port 323 on the first PCB board 31a and the second PCB board 31b, it avoids the need to additionally provide connection ports 328 (as shown in Figure 2) on the first PCB board 31a and the second PCB board 31b for connecting the power conversion circuits on the first PCB board 31a and the second PCB board 31b. The first PCB board 31a can save on the positive and negative connection ports used for electrical connection with the power conversion circuit on the second PCB board 31b. Similarly, the second PCB board 31b can save on the positive and negative connection ports used for electrical connection with the power conversion circuit on the second PCB board 31b. This effectively reduces the number of ports on the first and second PCB boards 31a and 31b, and also reduces the number of cables within the power converter 30 used to connect the power conversion circuits on the first and second PCB boards 31a and 31b. This not only reduces the risk of electrical arcing or sparking in the power converter 30 by reducing the number of ports prone to arcing or sparking, but also facilitates miniaturization of the power converter 30 by reducing ports and cables. Alternatively, without changing the size of the power converter 30, the distance between ports can be increased to further reduce the risk of electrical arcing or sparking between ports.

[0100] Furthermore, since the wire 50 connected to the bat1+ port is electrically connected to the Bus+ port, a portion of the current output from the first battery cluster 20a can be directly shunted to the load, and another portion can be shunted to the Bus+ port, thus effectively reducing the current flowing through the bat1+ port, which is electrically connected to the Bus+ port. Similarly, since the wire 50 connected to the bat2- port is electrically connected to the Bus- port, a portion of the current output from the second battery cluster 20b can be directly shunted to the load, and another portion can be shunted to the Bus- port, thus effectively reducing the current flowing through the bat2- port, which is electrically connected to the Bus- port. This effectively reduces the current flowing through the bat1+ port and the first output port 3241 on the first PCB board 31a, as well as the bat2- port and the Bus+ port on the second PCB board 31b. This reduces the size of the bat1+ port and the Bus- port on the first PCB board 31a, as well as the bat2- port and the second output port 3242 on the second PCB board 31b. It also improves the safety performance of the bat1+ port and the Bus- port on the first PCB board 31a, as well as the bat2- port and the Bus+ port on the second PCB board 31b.

[0101] It is understood that in some other implementations, the bat1-port and the bat2+port may also be the first port 3210, with the bat1-port and the Bus-port electrically connected by wire 50, and the bat2+port and the Bus+port electrically connected by wire 50.

[0102] Referring to Figures 3a-5, in a specific embodiment, the bat1+ port is the first port 3210. The bat1+ port, the Bus+ port, the positive output terminal of the first battery cluster 20a, and the positive interface of the load external interface 60 are electrically connected through the same wire 50. The bat2- port is the first port 3210. The bat2- port, the Bus- port, the negative output terminal of the second battery cluster 20b, and the negative interface 62 of the load external interface 60 are simultaneously electrically connected through another wire 50. The negative output terminal of the first battery cluster 20a is electrically connected to bat1- through wire 50, and the positive output terminal of the second battery cluster 20b is electrically connected to bat2+ through wire 50. In this embodiment, the current output from the first battery cluster 20a can be synchronously shunted to the bat1+ port, the Bus+ port, and the negative interface 62 of the positive external load interface. Similarly, the bat2- port, the Bus- port, and the negative interface 62 of the load external interface 60 can also be shunted. This effectively reduces the current flowing through the bat1+ port, Bus+ port, bat2- port, and Bus- port, thereby improving the safety of the power converter 30 while effectively reducing the size of the bat1+ port, Bus+ port, bat2- port, and Bus- port. Alternatively, when the energy storage cabinet 100 requires high-power conversion, the power converter 30 in this embodiment has more space to accommodate larger bat1+ port, Bus+ port, bat2- port, and Bus- port.

[0103] Referring to Figures 3a-5, in some embodiments, the housing 33 of the power converter 30 includes opposing top wall 331 and bottom wall 332.

[0104] The first PCB board 31a and the second PCB board 31b are arranged in the height direction of the power converter 30, that is, the first PCB board 31a and the second PCB board 31b are respectively set on the top wall 331 and the bottom wall 332. For example, the first PCB board 31a is set on the bottom wall 332 and the second PCB board 31b is set on the top wall 331.

[0105] Referring to Figures 3a-5, in some embodiments, the first PCB board 31a and the second PCB board 31b are arranged along the height direction of the power converter 30. In the height direction Z of the power converter 30, the Bus+ port is directly opposite to the first port 3210 on the first PCB board 31a, and the Bus- port is directly opposite to the first port 3210 on the second PCB board 31b. In this embodiment, because the Bus+ port is directly opposite to the first port 3210 on the first PCB board 31a, and the Bus- port is directly opposite to the first port 3210 on the second PCB board 31b, it is convenient to connect the wire 50 electrically connected to the Bus+ port to the first port 3210 on the first PCB board 31a. It is also convenient to connect the wire 50 electrically connected to the Bus- port to the first port 3210 on the second PCB board 31b.

[0106] Referring to Figures 3a-5, in some embodiments, the first PCB board 31a and the second PCB board 31b are symmetrically arranged, that is, the various functional devices provided on the first PCB board 31a are located on the side of the first PCB board 31a facing the second PCB board 31b, and the various functional devices provided on the second PCB board 31b are located on the side of the second PCB board 31b facing the first PCB board 31a.

[0107] To facilitate the connection between the wire 50 and the power converter 30, referring to Figures 3a-5, in some embodiments, the wire 50 is a rigid copper busbar 51. Multiple copper busbars 51 are fixed on the rear wall 16 of the cabinet 10, and multiple external ports are provided on the side of the power converter 30 housing 33 facing the rear wall 16. Multiple copper busbars 51 are plugged into multiple external ports and electrically connected to the external ports.

[0108] Referring to Figures 3a-5, in some embodiments, the copper busbar 51 electrically connected to the first port 3210 includes a first portion 511 extending along the height direction Z of the power converter 30 and a plurality of second portions 512 spaced along the height direction Z of the power converter 30 on the first portion 511, the extension direction of the plurality of second portions 512 being perpendicular to the extension direction of the first portion 511.

[0109] In this configuration, multiple second portions 512 of the copper busbar 51, electrically connected to the first port 3210 on the first PCB board 31a, are respectively plugged into and electrically connected to the bat1+ port, the Bus+ port, and the output port of the cluster control box 40 of the first battery cluster 20a. Similarly, multiple second portions 512 of the copper busbar 51, electrically connected to the first port 3210 on the second PCB board 31b, are respectively plugged into and electrically connected to the bat2- port, the Bus- port, and the output port of the cluster control box 40 of the second battery cluster 20b.

[0110] In this embodiment, since the copper busbar 51 can be fixed to the rear wall 16 of the cabinet 10 first, and then the power converter 30 is inserted into the cabinet 10, the second part 512 of the copper busbar 51 can be plugged into the bat1+ port, Bus+ port, bat2- port, or Bus- port, etc., so that the assembly and connection of the power converter 30 is still convenient even when the external port of the power converter 30 is located on the rear wall of the housing 33 of the power converter 30. In addition, since the resistance of the copper busbar 51 is low, the loss when the current passes through the copper busbar 51 can be effectively reduced.

[0111] Furthermore, since the Bus+ port is arranged opposite to the first port 3210 on the first PCB board 31a, and the Bus- port is arranged opposite to the first port 3210 on the second PCB board 31b, the arrangement direction of the Bus+ port and the first port 3210 on the first PCB board 31a is consistent with the extension direction of the first part 511 of the copper busbar 51 electrically connected to the first port 3210, and the arrangement direction of the Bus- port and the first port 3210 on the second PCB board 31b is consistent with the extension direction of the first part 511 of the copper busbar 51 electrically connected to the first port 3210. This effectively simplifies the copper busbar 51 and reduces the difficulty of connecting the power converter 30 to the copper busbar 51.

[0112] For ease of connection, referring to Figures 3a-5, in some embodiments, the output terminal of the cluster control box 40 is also located on the side of the cluster control box 40 housing 33 facing the rear wall 16, so that the copper busbar 51 can easily connect the output terminal of the cluster control box 40 and the external port of the power converter 30.

[0113] In some embodiments, the first portion 511 and a plurality of second portions 512 of the copper busbar 51 electrically connected to the first port 3210 are integrally formed, thereby not only improving the strength of the copper busbar 51 electrically connected to the first port 3210, but also reducing the resistance of the copper busbar 51 electrically connected to the first port 3210.

[0114] Figure 6 is a schematic diagram of the control logic of a power converter 30 provided in an embodiment of this application.

[0115] Referring to Figure 6, in some embodiments, a multi-stage power conversion circuit is provided on the first PCB board 31a. These multi-stage power conversion circuits on the first PCB board 31a are connected in series. It is understood that the multi-stage power conversion circuits on the first PCB board 31a can be connected in series through the lines on the first PCB board 31a. A multi-stage power conversion circuit is provided on the second PCB board 31b. These multi-stage power conversion circuits on the second PCB board 31b are connected in series. It is understood that the multi-stage power conversion circuits on the second PCB board 31b can be connected in series through the lines on the second PCB board 31b.

[0116] Since the first port 3210 on the first PCB board 31a is the bat1+ port, the wire 50 connected to the bat1+ port is electrically connected to the Bus+ port, and the first port 3210 on the second PCB board 31b is the bat2- port, the wire 50 connected to the bat2- port is electrically connected to the Bus- port, the circuit after the multi-stage power conversion circuit on the first PCB board 31a is connected in series and the circuit after the multi-stage power conversion circuit on the second PCB board 31b is connected in series can be set in parallel through the wire 50 provided on the cabinet 10. The Bus- port, Bus+ port and N port are used to electrically connect the parallel total circuit to the external load. In this embodiment, since the first PCB board 31a and the second PCB board 31b are connected in parallel, the normal operation of the other PCB board 31 will not be affected by the damage of one PCB board 31. Moreover, since the circuit after the series connection of the multi-stage power conversion circuit on the first PCB board 31a and the circuit after the series connection of the multi-stage power conversion circuit on the second PCB board 31b are connected in parallel using the wires 50 on the cabinet 10, that is, the wires 50 outside the power converter 30, it can avoid having too many wires 50 inside the power converter 30, reducing the safety risks caused by the wires 50. Furthermore, since the circuit after the series connection of the multi-stage power conversion circuit on the first PCB board 31a and the circuit after the series connection of the multi-stage power conversion circuit on the second PCB board 31b are connected in parallel using the ports already existing on the first PCB board 31a and the external ports already existing on the second PCB board 31b, it can avoid having connection ports for parallel connection on the first PCB board 31a and the second PCB board 31b (as shown in Figure 2), saving the number of ports. While improving the safety of the power converter 30, it also facilitates the miniaturization design of the power converter 30.

[0117] Figure 7 is a simplified front view of another power converter 30 provided in this embodiment. The main difference between the power converter 30 in Figure 7 and the embodiments in Figures 3a-5 lies in the design of the grounding port 325. It should be noted that the components and connections not shown in Figure 7 mentioned in this embodiment, but the components and connections shown in Figures 3a-5, can be referred to the embodiments in Figures 3a-5, such as the bat1+ port, Bus+ port, bat2- port, and Bus- port, etc., and will not be described again here.

[0118] Referring to Figure 7, in some embodiments, the plurality of external ports on the first PCB board 31a further include a first ground port 326. For ease of description, in this embodiment, the first ground port 326 on the first PCB board 31a is designated as port N1. The plurality of external ports on the second PCB board 31b further include a second ground port 327. For ease of description, in this embodiment, the second ground port 327 on the second PCB board 31b is designated as port N2.

[0119] Ports N1 and N2 are electrically connected, and either port N1 or N2 is used for electrical connection to the load. Specifically, ports N1 and N2 can be electrically connected by wires 50 on the cabinet 10. For example, taking copper busbar 51 as an example, the copper busbar 51 plugged into port N1 is simultaneously plugged into and electrically connected to port N2 and the grounding port 325 of the load external interface 60.

[0120] In this embodiment, since the power converter 30 necessarily has an external grounding port 325, this embodiment utilizes the external grounding port 325 and adds another external grounding port 325. The first grounding port 326 on the first PCB board 31a and the second grounding port 327 on the second PCB board 31b can be electrically connected through an external wire 50 to realize the parallel connection of the grounding terminal of the power conversion circuit on the first PCB board 31a and the grounding terminal of the power conversion circuit on the second PCB board 31b. Compared with the scheme in the embodiments of Figures 3a-5, it can avoid setting additional connection ports on the first PCB board 31a and the second PCB board 31b for electrically connecting the grounding terminal of the power conversion circuit on the first PCB board 31a and the grounding terminal of the power conversion circuit on the second PCB board 31b (as shown in Figure 2), thereby effectively reducing the number of ports. Furthermore, in the embodiments shown in Figures 3a-5, the additional connection ports on the first PCB board 31a and the second PCB board 31b require cable connection, which is located inside the housing 33 of the power converter 30. In this embodiment, the first grounding port 326 of the power conversion circuit on the first PCB board 31a and the second grounding port 327 of the power conversion circuit on the second PCB board 31b are connected in parallel by an external wire 50, thus avoiding the need for a wire 50 inside the housing 33 of the power converter 30 and improving the safety of the power converter 30.

[0121] Furthermore, in this embodiment, the bat1+ port, Bus+ port, the positive output terminal of the first battery cluster 20a, and the positive interface 61 of the load external interface 60 are electrically connected via the same wire 50, and the bat2- port, Bus- port, the negative output terminal of the second battery cluster 20b, and the negative interface 62 of the load external interface 60 are electrically connected via the same wire 50. This eliminates the need for additional ports and cables located within the power converter 30 housing 33, besides the external ports, thus improving the safety of the power converter 30 and facilitating its miniaturization design.

[0122] To facilitate the connection of the wires 50, referring to Figure 7, in some embodiments, the bat1+ port and the Bus+ port are arranged facing each other in the height direction of the power converter 30. This facilitates the connection of the wires 50 that are plugged into the bat1+ port to the Bus+ port.

[0123] To facilitate the connection of the wires 50, referring to Figure 7, in some embodiments, the bat2-port and the bus-port are arranged facing each other in the height direction of the power converter 30. This facilitates the connection of the wires 50 that are plugged into the bat2-port to the bus-port.

[0124] To facilitate the connection of the wires 50, referring to Figure 7, in some embodiments, the N1 port and the N2 port are arranged facing each other in the height direction of the power converter 30. This facilitates the connection of the wire 50, which is plugged into the N1 port, to the N2 port for electrical connection.

[0125] To improve the rationality of external ports, referring to Figure 7, in some embodiments, the bat1- port and bat2+ port are arranged facing each other in the height direction of the power converter 30, so as to make full use of the space in the height direction of the power converter 30, which is beneficial to the miniaturization design of the power converter 30.

[0126] Figure 8 is a simplified front view of another power converter 30 provided in this embodiment. The main difference between the power converter 30 in Figure 8 and the embodiments in Figures 3a-5 lies in the number of PCB boards 31 and the design of external ports. It should be noted that the components and connections not shown in Figure 7 mentioned in this embodiment, but which are shown in Figures 3a-5, can be referred to in the embodiments in Figures 3a-5, such as the bat+ port, Bus port, etc., and will not be described again here.

[0127] Referring to Figure 8, in some embodiments, at least one PCB board 31 includes a PCB board 31, and a plurality of input ports 321 on the PCB board 31 include a bat+ port and a bat- port, which are used for electrical connection to a power source. A plurality of external ports on the PCB board 31 also include an N port and a Bus+ port. The bat- port is a first port 3210, and the first port 3210, the N port, and the Bus+ port are used for electrical connection to a load. The bat- port is used to electrically connect to the negative output terminal of the power source (e.g., battery cluster 20) and the negative input terminal of the load via wires 50, respectively. The bat+ port is used to electrically connect to the positive output terminal of the power source, and the Bus+ port is used to electrically connect to the positive input terminal of the load.

[0128] It is understandable that in some other implementations, the bat+ port can be the first port 3210, and the output port 324 on the PCB board 31 can be the Bus- port.

[0129] In this embodiment, the first port 3210 is used to be electrically connected to the load, that is, the wire 50 connected to the first port 3210 is simultaneously electrically connected to the battery cluster 20 and the load.

[0130] Based on this, the first port 3210 is used to receive a portion of the current output from the battery cluster 20 and send it to the power conversion circuit. The first port 3210 is also used to send the current output from the power conversion circuit to the load, and another portion of the current output from the battery cluster 20 is sent directly to the load. Since the first port 3210 is both the input port 321 and the output port 324 of the power converter 30, one output port 324 for electrical connection to an external load can be saved. With the size of the power converter 30 remaining unchanged, the number of multiple external ports is reduced, and the spacing between multiple external ports can be appropriately increased, thereby effectively reducing the risk of electrical arcing or sparking between multiple external ports. Secondly, since the wire 50 connected to the first port 3210 is electrically connected to both the battery cluster 20 and the load, meaning the battery cluster 20 and the load can be directly connected via the wire 50, only a portion of the current output from the battery cluster 20 enters the power conversion circuit through this port. The other portion of the current output from the battery cluster 20 is directly supplied to the load. In other words, only a portion of the current output from the battery cluster 20 is used to pass through the power conversion circuit and then output to the load to meet the transformation requirements. Because this port only supplies a portion of the current output from the battery cluster 20 to the power conversion circuit, the current pressure that this port needs to withstand is less than the total current output from the battery cluster 20. This effectively reduces the danger of electrical arcing or sparking when current flows through this port. Moreover, since this port does not need to carry a large current, its size can be effectively reduced, which is beneficial for the miniaturization design of the power converter 30.

[0131] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An energy storage cabinet, characterized by, The energy storage cabinet includes a cabinet, a power converter installed inside the cabinet, at least one battery cluster, and multiple wires. The at least one battery cluster includes multiple stacked battery packs. The power converter includes at least one PCB board and a power conversion circuit disposed on each of the at least one PCB board. Each PCB board includes a plurality of input ports, and the plurality of input ports on each PCB board are electrically connected to a battery cluster through a plurality of wires. The plurality of input ports on each of the PCB boards include at least one first port, and the wires electrically connected to the at least one first port are used for electrical connection to an external load; The wire electrically connected to the at least one first port is used to receive the current output by the battery cluster, and a portion of the received current is transmitted to the power conversion circuit through the at least one first port, while another portion of the received current is transmitted to the external load through the wire electrically connected to the at least one first port.

2. The energy storage cabinet of claim 1, wherein, The at least one PCB board includes a first PCB board and a second PCB board, and the at least one battery cluster includes a first battery cluster and a second battery cluster; The first port of the first PCB board is electrically connected to the output port of the second PCB board, and the first port of the first PCB board and the output port of the second PCB board have the same polarity. The first port of the second PCB board is electrically connected to the output port of the first PCB board, and the first port of the second PCB board has the same polarity as the output port of the first PCB board. The first port on the first PCB has the opposite polarity to the first port on the second PCB.

3. The energy storage cabinet of claim 2, wherein, The first PCB board and the second PCB board are arranged in the height direction of the power converter. In the height direction of the power converter, the output port of the second PCB board is arranged opposite to the first port on the first PCB board, and the output port of the first PCB board is arranged opposite to the first port on the second PCB board.

4. The energy storage cabinet of claim 2, wherein, The plurality of conductors are all copper busbars. The copper busbar electrically connected to the first port includes a first part and a plurality of second parts. The first part extends along the height direction of the power converter. The plurality of second parts are spaced apart on the first part along the height direction of the power converter. The extension direction of the plurality of second parts is perpendicular to the extension direction of the first part. The plurality of second parts are respectively used to plug into and electrically connect to the first port, the output port of the first PCB board, or the output port of the second PCB board.

5. The energy storage cabinet of claim 4, wherein, The first port on the first PCB board is the positive input port on the first PCB board. The second parts of the copper busbar electrically connected to the positive input port on the first PCB board are respectively plugged into and electrically connected to the positive output terminal of the first battery cluster, the positive input port and the output port of the second PCB board. The first port on the second PCB board is the negative input port on the second PCB board. Multiple second parts of the wires electrically connected to the negative input port on the second PCB board are respectively plugged into and electrically connected to the negative output terminal of the second battery cluster, the negative input port and the output port of the first PCB board.

6. The energy storage cabinet of claim 2, wherein, The power conversion circuit on the first PCB board and the power conversion circuit on the second PCB board are connected in parallel.

7. The energy storage cabinet of claim 2, wherein, The first PCB board further includes a first grounding port, and the second PCB board further includes a second grounding port. The first grounding port and the second grounding port are electrically connected by a wire. The wire connected to the first grounding port or the second grounding port is used to electrically connect to the grounding port of the external load.

8. The energy storage cabinet of claim 1, wherein, The at least one PCB board includes a PCB board, and the plurality of input ports on the PCB board include a positive input port and a negative input port. The positive input port or the negative input port is the first port. The PCB board also includes a ground port and an output port. The wires electrically connected to the first port are used to electrically connect to the battery cluster and the external load, respectively. The ground port and the output port are electrically connected to the external load through the wires, respectively.

9. The energy storage cabinet of any of claims 1-8, wherein, All of the multiple wires are copper busbars, which are fixed to the rear wall of the cabinet. The multiple input ports are located on the side of the power converter facing the rear wall. The multiple wires are plugged into the multiple input ports and electrically connected to them.

10. A power converter, characterized by, The power converter includes at least one PCB board and a power conversion circuit disposed on each of the at least one PCB board. Each of the PCB boards includes multiple input ports, which are respectively used to be electrically connected to a power source via wires. The multiple input ports include at least one first port. The wire electrically connected to the at least one first port is used to be electrically connected to a load. The wire electrically connected to the at least one first port is used to receive the current output by the power source and to transmit a portion of the received current to the power conversion circuit through the at least one first port. The other portion of the received current is transmitted to the load through the wire electrically connected to the at least one first port.

11. The power converter of claim 10, wherein, The at least one PCB board includes a first PCB board and a second PCB board; The first port on the first PCB is electrically connected to the output port of the second PCB, and the polarity of the first port on the first PCB and the output port of the second PCB is the same. The first port on the second PCB is electrically connected to the output port of the first PCB, and the first port on the second PCB and the output port of the first PCB have the same polarity. The first port on the first PCB and the first port on the second PCB have opposite polarities.

12. The power converter of claim 11, wherein, The first PCB board and the second PCB board are arranged in the height direction of the power converter. In the height direction of the power converter, the output port of the second PCB board is arranged opposite to the first port on the first PCB board, and the output port of the first PCB board is arranged opposite to the first port on the second PCB board.

13. The power converter of claim 11, wherein, The conductor is a copper busbar. The copper busbar electrically connected to the first port includes a first portion extending along the height direction of the power converter and a plurality of second portions spaced apart on the first portion along the height direction of the power converter. The extension direction of the plurality of second portions is perpendicular to the extension direction of the first portion. The plurality of second portions are used to plug into and electrically connect to the first port, the output port of the first PCB board, or the output port of the second PCB board.

14. The power converter of claim 13, wherein, The first port on the first PCB board is the positive input port on the first PCB board. The multiple second parts of the copper busbar electrically connected to the positive input port on the first PCB board are respectively plugged into and electrically connected to the positive output terminal of the first battery cluster, the positive input port and the output port of the second PCB board. The first port on the second PCB board is the negative input port. The multiple second parts of the copper busbar electrically connected to the negative input port on the second PCB board are respectively plugged into and electrically connected to the negative output terminal of the second battery cluster, the negative input port and the output port of the first PCB board.

15. The power converter of claim 11, wherein, The power conversion circuit on the first PCB board and the power conversion circuit on the second PCB board are connected in parallel.

16. The power converter of claim 11, wherein, The first PCB board further includes a first grounding port, and the second PCB board further includes a second grounding port. The first grounding port and the second grounding port are electrically connected by a wire, and the wire electrically connected to the first grounding port or the second grounding port is used to electrically connect to the grounding port of the load.

17. The power converter of claim 10, wherein, The at least one PCB board includes a PCB board, and the plurality of input ports on the PCB board include a positive input port and a negative input port. The positive input port or the negative input port is the first port. The PCB board also includes a ground port and an output port. The wires electrically connected to the first port are used to electrically connect to the power source and the load, respectively. The ground port and the output port are electrically connected to the load through wires, respectively.

Images