Energy storage cabinet and power converter

Abstract

The embodiment of the utility model provides 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 being electrically connected with a power source, and at least one input port in the plurality of input ports on each PCB is used for being electrically connected with a load. The at least one input port is electrically connected with the power source end and is electrically connected with the load end, so that at least one external port of the power converter can be reduced, and the arrangement distance among the rest of the external ports can be increased under the condition that the size of the power converter is not changed; and the sparking risk or the electric arc pulling risk between the ports is reduced. Besides, a part of current output by the power source is directly transmitted to the load end, so that the current flowing through at least one port can be reduced, and the risk probability of the port is reduced. In conclusion, the safety performance of the power converter can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power conversion, and in particular to an energy storage cabinet and a power converter. BACKGROUND

[0002] The power converter in the related art comprises two ports of bat+ and bat- for connecting with a power source and three ports of Bus+, Bus- and N for connecting with a load, and the current flowing from the two ports of bat+ and bat- flows to the load through the processing of a power conversion circuit in the power converter and then flows out through the three ports of Bus+, Bus- and N.

[0003] However, for a power converter with relatively large input power, the current flowing from the two ports of bat+ and bat- of the power converter and the current flowing out from the three ports of Bus+, Bus- and N of the power converter are both very large, in order to ensure safety, the two ports of bat+ and bat- and the three ports of Bus+, Bus- and N need to be made large enough to enable the current to flow safely, however, in the case that the layout space of the ports of the power converter is limited, it is difficult to make all the ports large enough, which results in that the power converter cannot input large current. In the case that the size of the power converter is fixed, when passing large current, electrical sparking, arc drawing and the like are likely to occur between the ports, which causes safety risks in the use of the power converter. UTILITY MODEL CONTENT

[0004] Embodiments of the present application provide an energy storage cabinet and a power converter to improve the safety risks of the power converter.

[0005] In a first aspect, an energy storage cabinet is provided, which comprises a cabinet body, a power converter arranged in the cabinet body, at least one battery cluster, and a plurality of wires. The at least one battery cluster comprises a plurality of battery packs arranged in stacks. The power converter comprises at least one PCB board and a power conversion circuit arranged on each of the at least one PCB board. Each of the PCB boards comprises a plurality of input ports. The plurality of input ports on each of the PCB boards are electrically connected to one of the battery clusters through the plurality of wires. The plurality of input ports on each of the PCB boards comprises at least one first port. The wire electrically connected to the at least one first port is used to electrically connect 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 part of the received current is transmitted to the power conversion circuit through the at least one first port, and another part of the received current is transmitted to the external load through the wire electrically connected to the at least one first port.

[0006] In the embodiment, since the at least one first port is used to receive a part of the current output by the power source and transmit to the power conversion circuit, that is, the at least one first port is used to transmit the current output by the power conversion circuit to the load at the same time, another part of the current output by the power source is directly transmitted to the load. Therefore, the at least one first port is an input port used to receive the current input by the power source and an output port used to output the current to the load. In this way, at least one output port used to be electrically connected with the external load can be saved. In the case that the size of the power converter is unchanged, the number of external ports is reduced, and the distance between the plurality of external ports can be appropriately increased, thereby effectively reducing the risk of electrical sparking or electric arc between the plurality of external ports. In addition, since the wire connected with the at least one first port is electrically connected with the battery cluster and the load at the same time, that is, the battery cluster and the load can be directly communicated through the wire, for the first port, only a part of the current output by the battery cluster enters the power conversion circuit through the first port, and another part of the current output by the battery cluster is directly transmitted to the load end, that is, only a part of the current output by the battery cluster is used to be output to the load after being acted on by the power conversion circuit to meet the requirement of voltage conversion. Since the first port only transmits a part of the current output by the battery cluster to the power conversion circuit, the current pressure required to be borne by the first port is less than the total current output by the battery cluster, thereby effectively reducing the risk of electrical sparking or electric arc when the current flows through the first port. In addition, since the first port does not need to bear large current, the size of the first port can be effectively reduced, which is beneficial to the miniaturization design of the power converter.

[0007] In some embodiments, the at least one PCB includes a first PCB and a second PCB, and the at least one battery cluster includes a first battery cluster and a second battery cluster. The first port of the first PCB is electrically connected with the output port of the second PCB, and the polarity of the first port of the first PCB is the same as that of the output port of the second PCB. The first port of the second PCB is electrically connected with the output port of the first PCB, and the polarity of the first port of the second PCB is the same as that of the output port of the first PCB. The polarity of the first port on the first PCB is opposite to that of the first port on the second PCB.

[0008] In the embodiment, since the wire connected to the first port of the first PCB board is electrically connected to the output port of the second PCB board, the wire connected to 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 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, so that when the wire is used to electrically connect the first port of the first PCB board to the output port of the second PCB board and the wire is used to electrically connect the first port of the second PCB board to the output port of the first PCB board, the power conversion circuit on the first PCB board and the power conversion circuit on the second PCB board can be arranged in parallel, so as to be suitable for the energy storage cabinet with larger power conversion demand. Moreover, since the power conversion circuit on the first PCB board and the power conversion circuit on the second PCB board are arranged in parallel, when one of the PCBs is damaged, the other PCB of the power converter can continue to work, thereby avoiding the direct downtime of the power converter.

[0009] In some embodiments, the plurality of input ports on the first PCB board includes a first positive input port and a first negative input port, the first positive input port or the first negative input port is the first port, the plurality of input ports on the second PCB board includes a second positive input port and a second negative input port, the second positive input port or the second negative input port is the first port, and the wire electrically connected to the first port on the first PCB board is electrically connected to the output port of the second PCB board. The wire electrically connected to the first port on the second PCB board is electrically connected to the output port of the first PCB board.

[0010] In the embodiment, the first positive input port and the first negative input port on the first PCB board and the second PCB board are directly used, so that the connection ports for connecting the power conversion circuits on the first PCB board and the second PCB board can be avoided on the first PCB board and the second PCB board, that is, the positive connection ports and the negative connection ports for electrically connecting the power conversion circuits on the first PCB board and the second PCB board can be saved on the first PCB board, and the positive connection ports and the negative connection ports for electrically connecting the power conversion circuits on the first PCB board and the second PCB board can also be saved on the second PCB board, so that the number of ports arranged on the first PCB board and the second PCB board can be effectively reduced, and the cables and the like for connecting the power conversion circuits on the first PCB board and the second PCB board arranged in the power converter can also be reduced, so that not only the risk of electrical sparking or electric arc between the ports can be reduced by reducing the number of ports prone to electrical sparking or electric arc, but also the power converter can be miniaturized by reducing the ports and the cables, or the distance between the ports can be enlarged under the premise that the volume of the power converter is unchanged, so as to reduce the risk of electrical sparking or electric arc between the ports.

[0011] In some embodiments, the first PCB board and the second PCB board are arranged in the height direction of the power converter, and the output port of the second PCB board is arranged opposite to the first port on the first PCB board in the height direction of the power converter, and the output port of the first PCB board is arranged opposite to the first port on the second PCB board.

[0012] In the embodiment, the output port of the second PCB board is arranged opposite to the first port on the first PCB board in the height direction of the power converter, and the output port of the first PCB board is arranged opposite to the first port on the second PCB board, so that the wire electrically connected to the output port of the second PCB board can be connected to the first port on the first PCB board, and the wire electrically connected to the output port of the first PCB board can be connected to the first port on the second PCB board.

[0013] In some embodiments, the wire is a copper bar, the copper bar electrically connected to the first port includes a first part extending in the height direction of the power converter and a plurality of second parts spaced on the first part in 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, and the plurality of second parts are used for plugging and electrically connecting with the first port or the output port of the first PCB board or the output port of the second PCB board.

[0014] In the embodiment, the copper bar is plugged and electrically connected with the first port or the output port of the first PCB board or the output port of the second PCB board through the second part, which not only facilitates the assembly connection of the copper bar with the first port or the output port of the first PCB board or the output port of the second PCB board, i.e. facilitates the assembly connection of the power converter, but also reduces the loss when the current flows through the copper bar due to the low resistance of the copper bar.

[0015] In some embodiments, the first positive input port is the first port on the first PCB board, and the plurality of second parts of the copper bar electrically connected to the first port on the first PCB board are respectively plugged and electrically connected with the positive output end 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 the first port on the second PCB board, and the plurality of second parts of the copper bar electrically connected to the first port on the second PCB board are respectively plugged and electrically connected with the negative output end of the second battery cluster, the second negative input port and the output port of the first PCB board.

[0016] In the embodiment, the plurality of second portions of the copper bar electrically connected by the first port on the first PCB are respectively plugged into and electrically connected with the positive output end of the first battery cluster, the first positive input port and the output port of the second PCB, so that the current flowing through the first port, the first positive input port and the output port of the second PCB can be effectively reduced, and the size of the first port, the first positive input port and the output port of the second PCB of the first PCB can be effectively reduced. Similarly, the plurality of second portions of the copper bar electrically connected by the first port on the second PCB are respectively plugged into and electrically connected with the negative output end of the second battery cluster, the second negative input port and the output port of the first PCB, so that the size of the first port, the second negative input port and the output port of the first PCB of the second PCB can be effectively reduced.

[0017] In some embodiments, the power conversion circuit on the first PCB and the power conversion circuit on the second PCB are connected in parallel.

[0018] In the embodiment, the first PCB and the second PCB are in parallel, so that the normal operation of the other PCB will not be affected when one of the PCBs is damaged.

[0019] In some embodiments, the first PCB is provided with a plurality of power conversion circuits, the plurality of power conversion circuits on the first PCB are connected in series, the second PCB is provided with a plurality of power conversion circuits, the plurality of power conversion circuits on the second PCB are connected in series, the wires are used to connect the circuits after the series connection of the plurality of power conversion circuits on the first PCB and the circuits after the series connection of the plurality of power conversion circuits on the second PCB in parallel, and the output port of the first PCB and the output port of the second PCB are used to electrically connect the total circuit after parallel connection with the load.

[0020] In the embodiment, the first PCB and the second PCB are in parallel, so that the normal operation of the other PCB will not be affected when one of the PCBs is damaged. Moreover, the parallel connection of the circuits after the series connection of the plurality of power conversion circuits on the first PCB and the circuits after the series connection of the plurality of power conversion circuits on the second PCB utilizes the wires on the cabinet, i.e. the wires outside the power converter, so that too many wires can be avoided in the power converter, and the safety risk caused by the wires can be reduced. Moreover, the parallel connection of the circuits after the series connection of the plurality of power conversion circuits on the first PCB and the circuits after the series connection of the plurality of power conversion circuits on the second PCB utilizes the ports already on the first PCB and the ports already on the second PCB, so that the number of ports can be saved by avoiding the parallel ports on the first PCB and the second PCB, and the miniaturization design of the power converter is facilitated on the premise of improving the safety of the power converter.

[0021] In some embodiments, the first PCB further comprises a first ground port, and the second PCB further comprises 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 with a ground port of an external load.

[0022] In the embodiment, since the power converter necessarily has an externally connected ground port, by utilizing the externally connected ground port and additionally providing an externally connected ground port, the first ground port on the first PCB and the second ground port on the second PCB can be electrically connected by an external wire, so that the ground of the power conversion circuit on the first PCB and the ground of the power conversion circuit on the second PCB are in parallel, thereby avoiding the additional provision of a port for electrically connecting the ground of the power conversion circuit on the first PCB and the ground of the power conversion circuit on the second PCB.

[0023] In some embodiments, the at least one PCB comprises one PCB, the plurality of input ports on the one PCB comprises a positive input port and a negative input port, the positive input port or the negative input port is the first port, the one PCB further comprises a ground port and an output port, and the wire electrically connected to the first port is used to electrically connect with the battery cluster and the external load respectively, and the ground port and the output port are electrically connected with the external load by wires respectively.

[0024] 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 to an external load can be saved. While the size of the power converter remains unchanged, the number of multiple external ports is reduced, and the spacing between the multiple external ports can be appropriately increased, thereby effectively reducing the risk of electrical sparks or arcing between the multiple external ports. Secondly, since the wire connected to the first port simultaneously electrically connects the battery cluster and the load, that is, the battery cluster and the load can be directly connected via the wire, for the first port, only a portion of the current output by the battery cluster enters the power conversion circuit through the first port, and the other portion of the current output by the battery cluster is directly transmitted to the load end. In other words, only a portion of the current output by the battery cluster is used to be output to the load after being acted upon by the power conversion circuit to meet the voltage conversion requirements. Since this port only transmits a portion of the current output by 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 by the battery cluster, thereby effectively reducing the risk of electrical sparks or arcing when current flows through the first port. Moreover, since this port does not need to carry large currents, the size of the first port can be effectively reduced, which is conducive to the miniaturization design of the power converter.

[0025] In some embodiments, the multiple wires are copper busbars, the multiple wires are fixed on the rear wall of the cabinet, the multiple input ports are provided 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 the input ports.

[0026] In this embodiment, the wires are fixed on the rear wall of the cabinet, and multiple input ports are provided on the side of the power converter facing the rear wall, so that when the power converter is inserted into the cabinet, the power converter can be connected to the wires, reducing the difficulty of connecting the power converter.

[0027] In a second aspect, an embodiment of the present application provides a power converter, comprising at least one PCB board and a power conversion circuit provided on each of the at least one PCB board. Each PCB board includes a plurality of input ports, each of which is electrically connected to a power source via a conductor, the plurality of input ports including at least one first port, the conductor electrically connected to the at least one first port being electrically connected to a load, the conductor electrically connected to the at least one first port being configured to receive current output by the power source, and to transmit a portion of the received current to the power conversion circuit via the at least one first port, and another portion of the received current being transmitted to the load via the conductor electrically connected to the at least one first port.

[0028] In the embodiment, like the power converter of the energy storage cabinet in the foregoing, the power converter in the embodiment can also reduce the number of external ports of the power converter through the arrangement of the first port, so that the distance between the multiple external ports of the power converter can be reduced, and the risk of electrical sparking or arcing between the multiple external ports can be reduced. Also, since the first port only delivers a part of the current output by the battery cluster to the power conversion circuit, the first port does not need to bear a large current, so the size of the first port can be effectively reduced, which is conducive to the miniaturization design of the power converter.

[0029] In some embodiments, the at least one PCB includes a first PCB and a second PCB. 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 polarity of the first port on the second PCB and the output port of the first PCB is the same.

[0030] The polarity of the first port on the first PCB and the first port on the second PCB is opposite.

[0031] In the 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 and the power conversion circuit on the second PCB can be arranged in parallel, and when one of the PCBs is damaged, the other PCB of the power converter continues to work, avoiding direct downtime of the power converter.

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

[0033] The embodiment directly utilizes the positive input port and the negative input port on the first PCB and the second PCB, which can effectively reduce the number of ports on the first PCB and the second PCB, and can also reduce the cables and the like in the power converter for connecting the power conversion circuit on the first PCB and the second PCB, so as to not only reduce the risk of electric sparking or electric arc in the power converter by reducing the number of ports prone to electric sparking or electric arc, but also facilitate the miniaturization of the power converter by reducing the ports and the cables, or expand the distance between the ports under the premise of the same volume of the power converter, so as to reduce the risk of electric sparking or electric arc between the ports.

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

[0035] In the embodiment, the output port of the second PCB is arranged opposite to the first port on the first PCB in the height direction of the power converter, and the output port of the first PCB is arranged opposite to the first port on the second PCB, so that the wire electrically connected to the output port of the second PCB can be conveniently connected to the first port on the first PCB, and the wire electrically connected to the output port of the first PCB can be conveniently connected to the first port on the second PCB.

[0036] In some embodiments, the wire is a copper bar, the copper bar electrically connected to the first port includes a first part extending in the height direction of the power converter and a plurality of second parts spaced apart on the first part in 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, and the plurality of second parts are used for plugging and electrically connecting with the first port or the output port of the first PCB or the output port of the second PCB.

[0037] In the embodiment, the copper bar is plugged and electrically connected with the first port or the output port of the first PCB or the output port of the second PCB through the second part, which not only facilitates the assembly connection of the copper bar with the first port or the output port of the first PCB or the output port of the second PCB, but also reduces the loss when the current flows through the copper bar due to the low resistance of the copper bar.

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

[0039] In the present embodiment, since the plurality of second portions of the wire electrically connected to the first port on the first PCB are respectively plugged into and electrically connected to the positive output of the first battery cluster, the first positive input port, and the output port of the second PCB, the current flowing through the first port, the first positive input port, and the output port of the second PCB can be effectively reduced, and thus the size of the first port, the first positive input port, and the output port of the second PCB on the first PCB can be effectively reduced. Similarly, since the plurality of second portions of the wire electrically connected to the first port on the second PCB are respectively plugged into and electrically connected to the negative output of the second battery cluster, the second negative input port, and the output port of the first PCB, the size of the first port, the second negative input port, and the output port of the first PCB on the second PCB can be effectively reduced.

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

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

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

[0043] In the embodiment, since the power converter must have an externally connected ground port, the embodiment adds an externally connected ground port by utilizing the externally connected ground port, and thus the first externally connected ground port on the first PCB and the second externally connected ground port on the second PCB are electrically connected by external wires, so that the ground terminals of the power conversion circuits on the first PCB and the second PCB are connected in parallel, thereby avoiding the need to additionally provide ports on the first PCB and the second PCB for electrically connecting the ground terminals of the power conversion circuits on the first PCB and the second PCB.

[0044] In some embodiments, the at least one PCB includes one PCB, the plurality of input ports on the one PCB include a positive input port and a negative input port, the positive input port or the negative input port is the first port, the one PCB further includes a ground port and an output port, and the wires electrically connected to the first port are used to electrically connect the power source and the load, respectively, and the ground port and the output port are electrically connected to the external load by wires.

[0045] In the embodiment, since the positive input port or the negative input port is the first port, and the first port is both an input port and an output port of the power converter, one output port for electrically connecting the external load can be saved, and in the case where the size of the power converter does not change, the number of externally connected ports is reduced, and the spacing between the externally connected ports can be appropriately increased, thereby effectively reducing the risk of electrical sparking or arcing between the externally connected ports. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced.

[0047] Figure 1 A structural schematic view of the left wall behind the hidden cabinet body of the energy storage cabinet according to the embodiment of the present application;

[0048] Figure 2 A structural schematic view of a power converter in the related art;

[0049] Figure 3a A Figure 1 A connection schematic view of the power converter in the energy storage cabinet according to the embodiment;

[0050] Figure 3b A Figure 3a A current flow direction view of the wire connected to the first port according to the embodiment;

[0051] Figure 4 AFigure 1 exploded structural diagram of a power converter and a wire in the power converter;

[0052] Figure 5 for Figure 1 partial structural diagram of a power converter in an embodiment;

[0053] Figure 6 for

[0054] Figure 7 simplified diagram of a front view of another power converter provided by an embodiment of the present application;

[0055] Figure 8 simplified diagram of a front view of another power converter provided by an embodiment of the present application.

[0056] Explanation of Reference Signs:

[0057] 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;

[0058] 100, energy storage cabinet;

[0059] 10, cabinet body; 11, top wall; 12, bottom wall; 14, right wall; 15, front wall; 16, rear wall;

[0060] 20, battery cluster; 20a, first battery cluster; 20b, second battery cluster; 21, battery pack;

[0061] 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, ground port; 326, first ground port; 327, second ground port; 328, connection port; 33, shell; 331, top wall; 332, bottom wall;

[0062] 40, cluster control box; 41, positive output end of the cluster control box; 42, negative output end of the cluster control box;

[0063] 50, wire; 51, copper bar; 511, first part; 512, second part;

[0064] 60, load external interface; 61, positive interface; 62, negative interface; 63, ground interface. DETAILED DESCRIPTION

[0065] The following first explains some of the terms involved in the embodiments of this application.

[0066] The terms "first", "second", "third", "fourth", etc. in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0067] In this specification, the interpretation of terms such as "vertical" and so on.

[0068] Vertical: The vertical defined in this application is not limited to an absolute vertical intersection relationship (angle of 90 degrees). It allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and structural flatness. It allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0069] With the rapid growth of the social economy, the data center industry is booming globally, and the development and construction of data centers will continue at a rapid pace. Data centers are a strategic resource as important as human resources and natural resources. In the data center industry of the information age, only by utilizing data on a large scale and flexibly can we better understand and apply data.

[0070] Data centers typically consist of multiple modules, including cabinets, 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 power the cabinets and other modules.

[0071] Figure 1 This is a schematic structural diagram of the left wall of the hidden cabinet body 10 of an energy storage cabinet 100 provided in an embodiment of the present application. Figure 1The energy storage cabinet 100 in the embodiment can be applied to a power supply and distribution system in a data center. It can be understood that the energy storage cabinet 100 in the present application can also be an energy storage cabinet 100 applied in other scenarios, such as a commercial and industrial energy storage cabinet 100, a container-type energy storage cabinet 100, etc. It can be understood that the energy storage cabinet 100 in the embodiment of the present application can not only be used to receive external electric energy and store the external electric energy, but also can deliver the stored electric energy to an external load.

[0072] Referring to Figure 1 The energy storage cabinet 100 includes a cabinet body 10 and a battery cluster 20, a power converter 30 and a cluster control box 40 located in the cabinet body 10. The battery cluster 20 includes a plurality of battery packs 21 connected in series, and the power converter 30 is used to adjust the voltage of the battery cluster 20.

[0073] The cabinet body 10 includes a top wall 11 and a bottom wall 12 opposite in the height direction Z of the energy storage cabinet 100, a left wall (not shown in the figure) and a right wall 14 opposite in the length direction X of the energy storage cabinet 100, and a front wall 15 and a rear wall 16 opposite in 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, and 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 enclose an inner cavity of the cabinet body 10. The battery cluster 20, the power converter 30 and the cluster control box 40 are arranged in the inner cavity of the cabinet body 10.

[0074] It can be understood that the front wall 15 is usually provided as a cabinet door, or part of the front wall 15 is provided as a cabinet door, to facilitate assembly and maintenance.

[0075] The cluster control box 40 is electrically connected between the battery cluster 20 and the power converter 30, such as the electrical connection between the cluster control box 40 and the battery cluster 20 and the power converter 30 can be achieved by wires 50. The cluster control box 40 is used to control the charging and discharging of the battery cluster 20 and to ensure the safety performance of the charging and discharging of the battery cluster 20.

[0076] However, the energy storage cabinet 100 in the related art, when the input and output power is large, will cause the safety performance of the power converter 30 of the energy storage cabinet 100 to be greatly threatened, because the energy storage cabinet 100 in the related art needs a large current to flow through the power converter 30 when working, which causes the input and output ports 324 of the power converter 30 and the power conversion circuit on the PCB (Printed Circuit Board) to need to flow a large current, thereby greatly increasing the probability of arc and electrical sparking of the power converter 30, thereby greatly threatening the safety of the power converter 30.

[0077] Figure 2 A structure diagram of a power converter 30 in the related art.

[0078] Referring to Figure 2 A power converter 30 in the related art includes multiple PCB boards 31, each of which is provided with a power conversion circuit, and the power conversion circuits on the multiple PCB boards 31 are connected in series inside the power converter 30 through connection ports 328. Each battery cluster 20 is connected to one PCB board 31a and then output to a load through a certain PCB board 31b of the multiple PCB boards 31. Taking the power converter 30 including two PCB boards 31 as an example, and taking two battery clusters 20 as an example, the one PCB board 31a needs to be provided with four input ports 321, bat1+, bat1-, bat2+, and 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 be provided with three output ports 324, Bus+, Bus+, and N, for connection with the load, and three connection ports 328 for series connection with the power conversion circuit of the previous PCB board 31a. Thus, the power converter 30 in the related art needs to be provided with at least thirteen ports and at least three cables.

[0079] Such design at least has the following problems:

[0080] 1. Multiple connection ports 328 for series connection of different PCB boards 31 need to be provided on the PCB boards 31, such as three connection ports 328, positive, negative, and N, for each PCB board 31, and then the connection ports 328 on different PCB boards 31 need to be connected together through cables or copper bars 51, etc. Since the power converter 30 needs to be laid out with multiple connection ports 328 and copper bars 51 or cables for connection with the connection ports 328, a large space is needed, thus resulting in a large volume of the power converter 30. If the volume of the power converter 30 is too large, the distance between different ports will be too close, thus arc and electrical sparking are prone to occur.

[0081] 2. The large current input by the battery cluster 20 will pass through all the input ports 321, connection ports 328, and output ports 324 on the PCB boards 31 of the power converter 30. In order to enable each port to carry large current, each port needs to be made large enough in size, which however results in further increase of the volume of the power converter 30 and further shortening of the distance between different ports, thus arc and electrical sparking are prone to occur.

[0082] 3. Since multiple PCB boards 31 are connected in series, when one of the PCB boards 31 is damaged, the power conversion circuits on all the PCB boards 31 are disconnected and cannot work, i.e., the power converter 30 cannot work at all.

[0083] Figure 3a for Figure 1 A schematic diagram of the connection of the power converter in the energy storage cabinet 100 in the embodiment; Figure 3b for Figure 3a A current flow diagram of the wire 50 connected to the first port 3210 in the embodiment; Figure 4 for Figure 1 Schematic diagram of the exploded structure of the power converter 30 and the wire 50; Figure 5 for Figure 1 A schematic diagram of a portion of the structure of the power converter 30 in the embodiment.

[0084] In order to improve the safety performance of the power converter 30 when passing a large current and facilitate the miniaturization of the power converter 30, refer to Figure 3a and Figure 4 The energy storage cabinet 100 also includes a plurality of conductors 50. The cabinet body 10 is provided with a plurality of external load interfaces 60 for electrically connecting to an external load. It is understood that the plurality of external load interfaces 60 may include a positive electrode interface 61, a negative electrode interface 62, and a ground interface 63. The conductors 50 are used to connect the power converter 30 to the battery cluster 20, and to connect the power converter 30 to the external load interfaces 60, thereby electrically connecting the power converter 30 between the battery cluster 20 and the external load interfaces 60.

[0085] To facilitate connection, in some embodiments, the wire 50 is a copper bus 51 , such as a hard copper bus 51 or a soft copper bus 51 .

[0086] The energy storage cabinet 100 in this embodiment mainly reduces the current flowing from the battery cluster 20 into the power converter 30 to effectively reduce the load pressure of the power converter 30 and improve the safety of the power converter 30. Figure 3a - Figure 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 Color Department of Corrections) conversion or DC-AC (Domestic Communication Assistant Center) conversion.

[0087] The plurality of external ports on each PCB 31 are electrically connected to the power conversion circuit, specifically, the plurality of external ports can be electrically connected to the power conversion circuit through the lines on the PCB 31. The plurality of external ports are used to electrically connect the power conversion circuit between the battery cluster 20 and an external load, the electrical energy output by the battery cluster 20 is converted by the power conversion circuit and then delivered to the external load. Of course, the external load can also be replaced by an external power source, the electrical energy is delivered to the power conversion circuit through the external power source, and then delivered to the battery cluster 20 for storage after the electrical energy is converted by the power conversion circuit.

[0088] In order to achieve the electrical connection between the power conversion circuit and the battery cluster 20 and the external load, with reference to Figure 3a and Figure 5 In some embodiments, the plurality of external ports on each PCB 31 include a plurality of input ports 321 for electrical connection with a power source such as the battery cluster 20. The plurality of input ports 321 on each PCB 31 are respectively electrically connected to the power source through the wires 50 such as copper bars 51.

[0089] In some embodiments, the plurality of external ports of the power converter 30 are duckbill ports. The duckbill port has a simple structure and is easy to install.

[0090] With reference to Figure 3a and Figure 3b In some embodiments, the plurality of input ports 321 on each PCB 31 include at least one first port 3210, which is used for electrical connection with a load, that is, the wire 50 electrically connected to the first port 3210 is used for electrical connection with the battery cluster 20 and the load at the same time. That is, the wire 50 connected to at least one first port 3210 of the plurality of input ports 321 on each PCB 31 is used for electrical connection with the load.

[0091] Based on this, the at least one first port 3210 is used to receive a part of the current output by the power source and deliver it to the power conversion circuit, and the first port 3210 is also used to deliver the current output by the power conversion circuit to the load, while another part of the current output by the power source is directly delivered to the load. Specifically, the copper bar 51 electrically connected to the at least one first port 3210 is used to receive the current output by the battery cluster 20, and a part of the received current is delivered to the power conversion circuit through the at least one first port 3210, and another part of the received current is delivered to the external load through the copper bar 51 electrically connected to the at least one first port 3210.

[0092] In this embodiment, at least one first port 3210 is the same as the input port 321, which can be used to receive the current input from the power source, and the same as the output port 324, which is used to output current to the load. In this way, at least the following advantages exist: first, since at least one first port 3210 is both an input port of the power converter 30 and an output port of the power converter 30, an output port for electrical connection with an external load can be saved, and in the case of a constant size of the power converter 30, the number of external ports is reduced, and the spacing between multiple external ports can be appropriately increased, thereby effectively reducing the risk of electrical sparking or arcing between multiple external ports. Second, since the wire 50 connected to the at least one first port 3210 is electrically connected to the battery cluster 20 and the load at the same time, that is, the battery cluster 20 and the load can be directly connected through the wire 50, so for this first port 3210, only a part of the current output by the battery cluster 20 enters the power conversion circuit through the first port 3210, and another part of the current output by the battery cluster 20 is directly delivered to the load, that is, only a part of the current output by the battery cluster 20 is used to be output to the load after being acted on by the power conversion circuit to meet the requirement of voltage conversion. Since the first port 3210 only delivers a part of the current output by the battery cluster 20 to the power conversion circuit, the current pressure required to be borne by the first port 3210 is smaller than the total current output by the battery cluster 20, thereby effectively reducing the risk of electrical sparking or arcing when the current flows through the first port 3210, and since the first port 3210 does not need to bear a large current, the size of the first port 3210 can be effectively reduced, which is beneficial to the miniaturization design of the power converter 30.

[0093] It should be noted that at least one first port 3210 in the plurality of input ports 321 on each PCB board 31 is used to be electrically connected with the load, which can be explained at least from the following two cases, taking the power source as the battery cluster 20 for example.

[0094] The first is when one PCB 31 needs to connect one battery cluster 20, then the plurality of external ports on the PCB 31 includes two input ports 321 for electrical connection with the battery cluster 20, the two input ports 321 are respectively a positive input port 322 and a negative input port 323, one of the positive input port 322 and the negative input port 323 is the first port 3210, the first port 3210 is used for electrical connection with the load, and the other one of the positive input port 322 and the negative input port 323 is not used for direct connection with the load. The plurality of external ports on the PCB 31 further includes one output port 324 for electrical connection with the external load (load external interface 60), in some embodiments, the positive input port 322 is the first port 3210, and the output port 324 and the positive input port 322 together serve as the output of the PCB 31 and are electrically connected with the load external interface 60. In some embodiments, 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 of the PCB 31 and are electrically connected with the load external interface 60.

[0095] The second is when one PCB 31 needs to connect multiple battery clusters 20, such as two battery clusters 20, then the PCB 31 is provided with two parallel power conversion circuits for electrical connection with the two battery clusters 20. Specifically, the plurality of external ports of the PCB 31 includes four input ports 321, that is, two pairs of positive input ports 322 and negative input ports 323, wherein the two positive input ports 322 are electrically connected through the lines on the PCB 31, and the two negative input ports 323 are electrically connected through the lines on the PCB 31, thereby realizing the parallel connection between the two power conversion circuits, at this time, each pair of positive input port 322 and negative input port 323 has one interface as the first port 3210, for electrical connection with the external load (load external interface 60), that is, at this time, two first ports 3210 are provided in the four input ports 321 for electrical connection with the load external interface 60.

[0096] It should be further noted that the plurality of input ports 321 are not directly connected with the battery cluster 20, but the cluster control box 40 is electrically connected between the plurality of input ports 321 and the battery cluster 20, to facilitate the control of the battery cluster 20.

[0097] Referring to Figure 3a - Figure 5In some embodiments, the power converter 30 comprises two PCB boards 31, for the convenience of description, the two PCB boards 31 are set as a first PCB board 31a and a second PCB board 31b, the first PCB board 31a is provided with a total power conversion circuit, the power conversion circuit on the first PCB board 31a is used to be electrically connected with a battery cluster 20, similarly, the second PCB board 31b is provided with a total power conversion circuit, the power conversion circuit on the second PCB board 31b is used to be electrically connected with a battery cluster 20. For the convenience of description, the battery cluster 20 electrically connected with the first PCB board 31a is set as a first battery cluster 20a, and the battery cluster 20 electrically connected with the second PCB board 31b is set as a second battery cluster 20b.

[0098] Referring to Figure 3a - Figure 5 In some embodiments, the plurality of input ports 321 on the first PCB board 31a comprises a first positive input port 3221 and a first negative input port 3231, for the convenience of description, the first positive input port 3221 is set as a bat (Battery) 1+ port, and the first negative input port 3231 is set as a bat1- port, the bat1+ port and the bat1- port are used to be electrically connected with a first power source (the first battery cluster 20a). Specifically, the bat1+ port and the bat1- port can be electrically connected with the output end of the cluster control box 40 electrically connected with the first battery cluster 20a.

[0099] The plurality of external ports on the first PCB board 31a further comprises a first output port 3241 used to be electrically connected with an external load.

[0100] Referring to Figure 3a - Figure 5 In some embodiments, the plurality of input ports 321 on the second PCB board 31b comprises a second positive input port 3222 and a second negative input port 3232, for the convenience of description, the second positive input port 3222 is set as a bat2+ port, and the second negative input port 3232 is set as a bat2- port, the bat2+ port and the bat2- port are used to be electrically connected with a second power source (the second battery cluster 20b). Specifically, the bat2+ port and the bat2- port can be electrically connected with the output end of the cluster control box 40 electrically connected with the second battery cluster 20b.

[0101] The plurality of external ports on the second PCB board 31b further comprises a second output port 3242 used to be electrically connected with an external load.

[0102] Referring to Figure 3a - Figure 5 In some embodiments, the first PCB board 31a or the second PCB board 31b is further provided with a grounding port 325, for the convenience of description, the grounding port 325 is set as an N port.

[0103] The power converter 30 in the embodiment is used as an output end of the power converter 30 for electrical connection with an external load through the first output port 3241, the second output port 3242 and the N port, and is specifically electrically connected with the load external interface 60 arranged 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 with the positive interface 61, the negative interface 62 and the ground interface 63 of 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 with the positive interface 61 of the load external interface 60, and the first output port 3241 is a negative output port for electrical connection with 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 end of the power converter 30 for electrical connection with the external load, the current transformed by the power converter 30 can be delivered to the load.

[0104] Referring to Figure 3a In order to reduce the number of external connection ports and reduce the bearing current of the external connection ports, in some embodiments, the bat1+ port is the first port 3210, and the bat1+ port is electrically connected with the Bus+ port through the wire 50, such as through the copper bar 51 arranged on the cabinet 10, that is, the wire 50 connected with the bat1+ port is electrically connected with the Bus+ port.

[0105] The bat2- port is the first port 3210, and the bat2- port is electrically connected with the Bus- port through the wire 50, such as through the copper bar 51 arranged on the cabinet 10, that is, the wire 50 connected with the bat2- port is electrically connected with the Bus- port.

[0106] In the 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, the bat1+ port can also serve as an output port of the first PCB board 31a, and the bat2- port can also serve as an output port of the second PCB board 31b. Thus, by electrically connecting the bat1+ port and the Bus+ port through the wire 50, and 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 arranged in parallel, so as to be suitable for the energy storage cabinet 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 arranged in parallel, when one of the PCBs is damaged, the other PCB of the power converter 30 can continue to work, avoiding direct downtime of the power converter 30.

[0107] In addition, compared with the power converter 30 in the prior art, Figure 2 In the 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, the bat1+ port can also serve as an output port of the first PCB board 31a, and the bat2- port can also serve as an output port of the second PCB board 31b. Thus, by electrically connecting the bat1+ port and the Bus+ port through the wire 50, and 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 arranged in parallel, so as to be suitable for the energy storage cabinet 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 arranged in parallel, when one of the PCBs is damaged, the other PCB of the power converter 30 can continue to work, avoiding direct downtime of the power converter 30. Figure 2, that is, the positive connection port and the negative connection port for electrically connecting with the power conversion circuit on the second PCB board 31b can be saved on the first PCB board 31a, and the positive connection port and the negative connection port for electrically connecting with the power conversion circuit on the second PCB board 31b can be saved on the second PCB board 31b, so that the number of ports arranged on the first PCB board 31a and the second PCB board 31b can be effectively reduced, and the cable or the like for connecting the power conversion circuit on the first PCB board 31a and the second PCB board 31b arranged in the power converter 30 can also be reduced. Therefore, not only the risk of electric sparking or electric arc in the power converter 30 can be reduced by reducing the number of ports prone to electric sparking or electric arc, but also the miniaturization of the power converter 30 can be facilitated by reducing the ports and the cable, or the distance between the ports can be enlarged under the premise that the volume of the power converter 30 is unchanged, so as to reduce the risk of electric sparking or electric arc between the ports.

[0108] In addition, since the wire 50 connected with the bat1+ port is electrically connected with the Bus+ port, the current output from the first battery cluster 20a can not only be directly shunted to the load, but also be shunted to the Bus+ port, so that the current flowing through the bat1+ port electrically connected with the Bus+ port can be effectively reduced. Similarly, since the wire 50 connected with the bat2- port is electrically connected with the Bus- port, the current output from the second battery cluster 20b can not only be directly shunted to the load, but also be shunted to the Bus- port, so that the current flowing through the bat2- port electrically connected with the Bus- port can be effectively reduced. Therefore, the currents flowing through the bat1+ port and the first output port 3241 on the first PCB board 31a and the bat2- port and the Bus+ port on the second PCB board 31b are effectively reduced, so that the size of the bat1+ port and the Bus- port on the first PCB board 31a and the bat2- port and the second output port 3242 on the second PCB board 31b can be effectively reduced, and the safety of the bat1+ port and the Bus- port on the first PCB board 31a and the bat2- port and the Bus+ port on the second PCB board 31b can be improved.

[0109] It can be understood that in other embodiments, the bat1- port and the bat2+ port can also be the first port 3210, the bat1- port is electrically connected with the Bus- port through the wire 50, and the bat2+ port is electrically connected with the Bus+ port through the wire 50.

[0110] Referring to Figure 3a - Figure 5In 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 terminal of the load external interface 60 are electrically connected by the same wire 50, and 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 terminal of the load external interface 60 are electrically connected by another wire 50. In this embodiment, the current output from the first battery cluster 20a can be shunted to the bat1+ port, the Bus+ port, and the positive terminal of the load external interface 60, and the bat2- port, the Bus- port, and the negative terminal of the load external interface 60 can also be shunted, so that the currents flowing through the bat1+ port, the Bus+ port, the bat2- port, and the Bus- port can be effectively reduced, thereby improving the safety of the power converter 30 while effectively reducing the size of the bat1+ port, the Bus+ port, the bat2- port, and the Bus- port. Alternatively, when the energy storage cabinet 100 needs a large power conversion, the power converter 30 in this embodiment has more space to set the bat1+ port, the Bus+ port, the bat2- port, and the Bus- port with larger sizes.

[0111] With reference to Figure 3a - Figure 5 In some embodiments, the housing 33 of the power converter 30 includes opposite top and bottom walls 331 and 332.

[0112] The first and second PCB boards 31a and 31b are arranged in the height direction of the power converter 30, i.e., the first and second PCB boards 31a and 31b are respectively arranged on the top and bottom walls 331 and 332. For example, the first PCB board 31a is arranged on the bottom wall 332, and the second PCB board 31b is arranged on the top wall 331.

[0113] With reference to Figure 3a - Figure 5In some embodiments, the first PCB board 31a and the second PCB board 31b are arranged in the height direction of the power converter 30. In the height direction Z of the power converter 30, 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. In this embodiment, since the Bus+ port is arranged opposite to the first port 3210 on the first PCB board 31a in the height direction Z of the power converter 30, and the Bus- port is arranged opposite to the first port 3210 on the second PCB board 31b, the wire 50 electrically connected to the Bus+ port can be conveniently connected to the first port 3210 on the first PCB board 31a. The wire 50 electrically connected to the Bus- port can also be conveniently connected to the first port 3210 on the second PCB board 31b.

[0114] Referring to Figure 3a - Figure 5 In some embodiments, the first PCB board 31a and the second PCB board 31b are symmetrically arranged, that is, various functional devices arranged on the first PCB board 31a are located on the side of the first PCB board 31a facing the second PCB board 31b, and various functional devices arranged on the second PCB board 31b are located on the side of the second PCB board 31b facing the first PCB board 31a.

[0115] In order to facilitate the connection of the wire 50 to the power converter 30, referring to Figure 3a - Figure 5 In some embodiments, the wire 50 is a hard copper bar 51, a plurality of copper bars 51 are fixed on the rear wall 16 of the cabinet 10, a plurality of external ports are arranged on the side of the shell 33 of the power converter 30 facing the rear wall 16, and the plurality of copper bars 51 are inserted into the plurality of external ports and electrically connected to the external ports.

[0116] Referring to Figure 3a - Figure 5 In some embodiments, the copper bar 51 electrically connected to the first port 3210 includes a first portion 511 extending in the height direction Z of the power converter 30 and a plurality of second portions 512 arranged on the first portion 511 in the height direction Z of the power converter 30, and the extension direction of the plurality of second portions 512 is perpendicular to the extension direction of the first portion 511.

[0117] The plurality of second portions 512 of the copper bar 51 electrically connected to the first port 3210 on the first PCB board 31a are respectively inserted 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. The plurality of second portions 512 of the copper bar 51 electrically connected to the first port 3210 on the second PCB board 31b are respectively inserted 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.

[0118] In the embodiment, the copper bar 51 can be first fixed to the rear wall 16 of the cabinet 10, and then the power converter 30 is inserted into the cabinet 10, so that the second part 512 of the copper bar 51 can be connected with the bat1+ port, the Bus+ port, the bat2- port or the Bus- port, etc. When the external port of the power converter 30 is arranged on the rear wall of the shell 33 of the power converter 30, the assembly and connection of the power converter 30 can still be convenient. In addition, since the copper bar 51 has small resistance, the loss of current passing through the copper bar 51 can be effectively reduced.

[0119] In addition, 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. That is, 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 bar 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 bar 51 electrically connected to the first port 3210, so that the copper bar 51 can be effectively simplified, and the difficulty of the power converter 30 and the copper bar 51 can be reduced.

[0120] In order to facilitate connection, refer to Figure 3a - Figure 5 In some embodiments, the output end of the cluster control box 40 is also arranged on the side of the cluster control box 40 shell 33 facing the rear wall 16, so that the copper bar 51 can conveniently connect the output end of the cluster control box 40 and the external port of the power converter 30.

[0121] In some embodiments, the first part 511 and the plurality of second parts 512 of the copper bar 51 electrically connected to the first port 3210 are integrally formed, so that not only the strength of the copper bar 51 electrically connected to the first port 3210 can be improved, but also the resistance of the copper bar 51 electrically connected to the first port 3210 can be reduced.

[0122] Figure 6 A control logic schematic diagram of the power converter 30 provided in the embodiment of the application.

[0123] Refer to Figure 6In some embodiments, the first PCB board 31a is provided with multi-stage power conversion circuits, and the multi-stage power conversion circuits on the first PCB board 31a are connected in series. It can be 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. The second PCB board 31b is also provided with multi-stage power conversion circuits, and the multi-stage power conversion circuits on the second PCB board 31b are connected in series. It can be 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.

[0124] Since the first port 3210 on the first PCB board 31a is a 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 a bat2- port, the wire 50 connected to the bat2- port is electrically connected to the Bus- port, so that the multi-stage power conversion circuits connected in series on the first PCB board 31a and the multi-stage power conversion circuits connected in series on the second PCB board 31b can be connected in parallel through the wires 50 provided on the cabinet 10, and the Bus- port, the Bus+ port and the N port are used to electrically connect the total circuit connected in parallel to the external load. In this embodiment, since the first PCB board 31a and the second PCB board 31b are in parallel, the normal operation of the other PCB board 31 will not be affected when one of the PCB boards 31 is damaged. Moreover, since the multi-stage power conversion circuits connected in series on the first PCB board 31a and the multi-stage power conversion circuits connected in series on the second PCB board 31b are connected in parallel through the wires 50 on the cabinet 10, i.e., the wires 50 outside the power converter 30, it is possible to avoid too many wires 50 inside the power converter 30, thereby reducing the safety risk caused by the wires 50. Moreover, since the multi-stage power conversion circuits connected in series on the first PCB board 31a and the multi-stage power conversion circuits connected in series on the second PCB board 31b are connected in parallel through the ports already provided on the first PCB board 31a and the external ports already provided on the second PCB board 31b, it is possible to avoid providing connection ports for parallel connection (such as Figure 2 ) on the first PCB board 31a and the second PCB board 31b, thereby saving the number of ports and facilitating the miniaturization design of the power converter 30 under the premise of improving the safety of the power converter 30.

[0125] Figure 7 Another front view of the power converter 30 provided in the embodiments of the present application. Figure 7 The embodiments and Figure 3a - Figure 5 The main difference between the power converter 30 in the embodiments is the design of the grounding port 325. It should be noted that the Figure 7components and connection relationships not shown in the drawings, but shown in the Figure 3a - Figure 5 embodiments, such as bat1+ port, Bus+ port, bat2- port and Bus- port, etc., and will not be described here. Figure 3a - Figure 5

[0126] Referring to Figure 7 , in some embodiments, the plurality of external ports on the first PCB board 31a further includes a first ground port 326. For the convenience of description, in the present embodiment, the first ground port 326 on the first PCB board 31a is set as N1 port. The plurality of external ports on the second PCB board 31b further includes a second ground port 327. For the convenience of description, in the present embodiment, the second ground port 327 on the second PCB board 31b is set as N2 port.

[0127] , the N1 port and the N2 port are electrically connected, and the N1 port or the N2 port is used for electrical connection with the load. Specifically, the N1 port and the N2 port can be electrically connected by setting the wire 50 on the cabinet 10, such as taking the copper bar 51 as an example, the copper bar 51 inserted into the N1 port is simultaneously inserted into and electrically connected with the ground port 325 of the N2 port and the load external interface 60.

[0128] In the present embodiment, since the power converter 30 necessarily has a ground port 325 for external connection, by utilizing the ground port 325 for external connection and additionally setting a ground port 325 for external connection, the first ground port 326 on the first PCB board 31a and the second ground port 327 on the second PCB board 31b can be electrically connected by external wire 50, so as to realize the parallel connection of the ground end of the power conversion circuit on the first PCB board 31a and the ground end of the power conversion circuit on the second PCB board 31b, thereby compared with Figure 3a - Figure 5 the scheme in the embodiment, it can avoid the additional setting of the connection port (such as Figure 2 ) on the first PCB board 31a and the second PCB board 31b for electrically connecting the ground end of the power conversion circuit on the first PCB board 31a and the ground end of the power conversion circuit on the second PCB board 31b, thereby effectively reducing the number of ports. Moreover, Figure 3a - Figure 5 in the scheme in the embodiment, the connection ports additionally set on the first PCB board 31a and the second PCB board 31b need to be connected by cable, and the cable is located inside the shell 33 of the power converter 30, while in the present embodiment, the parallel connection of the first ground port 326 of the power conversion circuit on the first PCB board 31a and the second ground port 327 of the power conversion circuit on the second PCB board 31b is realized by external wire 50, thereby avoiding the setting of wire 50 inside the shell 33 of the power converter 30, and further improving the safety of the power converter 30.​

[0129] Furthermore, in this embodiment, the bat1+ port, the bus+ port, the positive output terminal of the first battery cluster 20a, and the positive terminal 61 of the load external interface 60 are electrically connected via the same wire 50, and the bat2- port, the bus- port, the negative output terminal of the second battery cluster 20b, and the negative terminal 62 of the load external interface 60 are electrically connected via the same wire 50. Consequently, in this embodiment, the power converter 30 does not require any additional ports or cables located within the housing 33 of the power converter 30, other than the external ports. This not only improves the safety of the power converter 30, but also facilitates a compact design of the power converter 30.

[0130] In order to facilitate the connection of the wire 50, refer to Figure 7 In some embodiments, the bat1+ port and the Bus+ port are arranged opposite each other in the height direction of the power converter 30, so as to facilitate the connection and electrical connection between the wire 50 connected to the bat1+ port and the Bus+ port.

[0131] In order to facilitate the connection of the wire 50, refer to Figure 7 In some embodiments, the bat2-port and the bus-port are arranged opposite each other in the height direction of the power converter 30. This facilitates the connection and electrical connection between the wire 50 plugged into the bat2-port and the bus-port.

[0132] In order to facilitate the connection of the wire 50, refer to Figure 7 In some embodiments, the N1 port and the N2 port are arranged opposite each other in the height direction of the power converter 30. This facilitates the connection and electrical connection of the wire 50 connected to the N1 port to the N2 port.

[0133] In order to improve the rationality of external ports, refer to Figure 7 In some implementations, the bat1- port and the bat2+ port are arranged opposite each other in the height direction of the power converter 30, thereby making full use of the space of the power converter 30 in the height direction, which is conducive to the miniaturized design of the power converter 30.

[0134] Figure 8 This is a simplified diagram of a front view of another power converter 30 provided in an embodiment of the present application. Figure 8 Examples and Figure 3a - Figure 5 The main difference between the power converter 30 in the embodiment is the number of PCB boards 31 and the design of the external ports. Figure 7 The components and connections not shown in the drawings are Figure 3a - Figure 5 The components and connection relationships shown in Figure 3a - Figure 5Embodiments, such as a bat+ port, a Bus port, and the like, are not described herein again.

[0135] Referring to Figure 8 In some embodiments, the at least one PCB board 31 comprises one PCB board 31, the plurality of input ports 321 on the one PCB board 31 comprises a bat+ port and a bat- port, the bat+ port and the bat- port are configured to be electrically connected to a power source. The plurality of external ports on the one PCB board 31 further comprises an N port and a Bus+ port, the bat- port is the first port 3210, the first port 3210, the N port, and the Bus+ port are configured to be electrically connected to a load. The bat- port is configured to be electrically connected to a negative output terminal of the power source (such as the battery cluster 20) and a negative input terminal of the load via the wire 50 respectively, the bat+ port is configured to be electrically connected to a positive output terminal of the power source, and the Bus+ port is configured to be electrically connected to a positive input terminal of the load.

[0136] It can be understood that in other embodiments, the bat+ port can be the first port 3210, and the output port 324 on the PCB board 31 can be a Bus- port.

[0137] In the present embodiment, the first port 3210 is configured to be electrically connected to a load, that is, the wire 50 connected to the first port 3210 is simultaneously electrically connected to the battery cluster 20 and the load.

[0138] Based on this, first port 3210 is used to receive a portion of the current output by battery cluster 20 and transmit it to the power conversion circuit. First port 3210 is also used to transmit the current output by the power conversion circuit to the load, while the remaining portion of the current output by battery cluster 20 is directly transmitted to the load. Since first port 3210 serves as both input port 321 of power converter 30 and output port 324 of power converter 30, one output port 324 for electrical connection to an external load is saved. While the size of power converter 30 remains unchanged, the number of external ports is reduced, and the spacing between the multiple external ports can be appropriately increased, thereby effectively reducing the risk of electrical sparks or arcing between the multiple external ports. Secondly, because the wire 50 connected to the first port 3210 electrically connects both the battery cluster 20 and the load, that is, the battery cluster 20 and the load can be directly connected via the wire 50, only a portion of the current output by the battery cluster 20 enters the power conversion circuit through this port, while the remaining portion of the current output by the battery cluster 20 is directly delivered to the load. In other words, only a portion of the current output by the battery cluster 20 is used to pass through the power conversion circuit and then be output to the load to meet the voltage conversion requirements. Because this port only transmits a portion of the current output by 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 by the battery cluster 20, thereby effectively reducing the risk of electrical sparks or arcing when current flows through this port. Furthermore, because this port does not need to carry large currents, its size can be effectively reduced, which facilitates the miniaturization of the power converter 30.

[0139] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An energy storage cabinet, characterized in that: The energy storage cabinet includes a cabinet body, a power converter arranged in the cabinet body, at least one battery cluster and a plurality of wires, wherein the at least one battery cluster includes a plurality of stacked battery packs; The power converter includes at least one PCB board and a power conversion circuit provided on each of the at least one PCB board, each of the PCB boards includes a plurality of input ports, and the plurality of input ports on each of the PCB boards are electrically connected to one of the battery clusters through a plurality of the wires; The plurality of input ports on each of the PCB boards include at least one first port, and the wire electrically connected to the at least one first port is used to be electrically connected 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 transmit a portion of the received current to the power conversion circuit through the at least one first port, and transmit another portion of the received current to the external load through the wire electrically connected to the at least one first port.

2. The energy storage cabinet according to claim 1, characterized in that: 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 polarity of the first port of the first PCB board and the output port of the second PCB board are the same; The first port of the second PCB board is electrically connected to the output port of the first PCB board, and the polarity of the first port of the second PCB board is the same as that of the output port of the first PCB board; The polarity of the first port on the first PCB board is opposite to that of the first port on the second PCB board.

3. The energy storage cabinet according to claim 2, characterized in that: 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 according to claim 2, characterized in that: The multiple wires are all copper busbars. The copper busbar electrically connected to the first port includes a first part and multiple second parts. The first part extends along the height direction of the power converter. The multiple second parts are arranged on the first part at intervals along the height direction of the power converter. The extension direction of the multiple second parts is perpendicular to the extension direction of the first part. The multiple second parts are respectively used to be plugged into and electrically connected to the first port or the output port of the first PCB board or the output port of the second PCB board.

5. The energy storage cabinet according to claim 4, characterized in that: The first port on the first PCB is a positive input port on the first PCB, and the plurality of second portions of the copper busbar electrically connected to the positive input port on the first PCB are respectively plugged into and electrically connected to the positive output end of the first battery cluster, the positive input port, and the output port of the second PCB; The first port on the second PCB board is a negative input port on the second PCB board, and the multiple second portions of the wire electrically connected to the negative input port on the second PCB board are respectively plugged into and electrically connected to the negative output end of the second battery cluster, the negative input port, and the output port of the first PCB board.

6. The energy storage cabinet according to claim 2, characterized in that: 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 according to claim 2, characterized in that: The first PCB board also includes a first ground port, and the second PCB board also includes a second ground port. The first ground port and the second ground port are electrically connected through 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 external load.

8. The energy storage cabinet according to claim 1, characterized in that: The at least one PCB board includes one PCB board, the multiple input ports on the one 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 one PCB board further includes a ground port and an output port, the first port is electrically connected to a wire for electrically connecting to the battery cluster and the external load, respectively, and the ground port and the output port are electrically connected to the external load via the wires, respectively.

9. The energy storage cabinet according to any one of claims 1 to 8, characterized in that: The multiple wires are all copper bars, the multiple wires are fixed on the rear wall of the cabinet, the multiple input ports are arranged on the side of the power converter facing the rear wall, and the multiple wires are plugged into the multiple input ports and electrically connected to the input ports.

10. A power converter, characterized in that: The power converter includes at least one PCB board and a power conversion circuit provided on each of the at least one PCB board; Each of the PCB boards includes a plurality of input ports, and the plurality of input ports are used to be electrically connected to a power source through wires respectively. The plurality of input ports include at least one first port, and 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 transmit a portion of the received current to the power conversion circuit through the at least one first port, and another 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 according to 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 board is electrically connected to the output port of the second PCB board, and the polarity of the first port on the first PCB board and the output port of the second PCB board are the same; The first port on the second PCB board is electrically connected to the output port of the first PCB board, and the polarity of the first port on the second PCB board is the same as that of the output port of the first PCB board; The polarity of the first port on the first PCB board and the polarity of the first port on the second PCB board are opposite.

12. The power converter according to 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 according to claim 11, wherein: The wire is a copper busbar, and 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, wherein the extension direction of the plurality of second portions is perpendicular to the extension direction of the first portion, and the plurality of second portions are used to be plugged into and electrically connected to the first port or the output port of the first PCB board or the output port of the second PCB board.

14. The power converter according to claim 13, wherein: The first port on the first PCB is a positive input port on the first PCB, and the plurality of second portions of the copper busbar electrically connected to the positive input port on the first PCB are respectively plugged into and electrically connected to the positive output end of the first battery cluster, the positive input port, and the output port of the second PCB; The first port on the second PCB board is a negative input port, and the multiple second portions 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 end of the second battery cluster, the negative input port, and the output port of the first PCB board.

15. The power converter according to 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 according to claim 11, wherein: The first PCB board also includes a first ground port, and the second PCB board also includes a second ground port. The first ground port and the second ground port are electrically connected via a wire, and the wire electrically connected to the first ground port or the second ground port is used to be electrically connected to the ground port of the load.

17. The power converter according to claim 10, characterized in that The at least one PCB board includes a PCB board, the multiple 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 wire electrically connected to the first port is used to be electrically connected to the power source and the load respectively, and the ground port and the output port are electrically connected to the load respectively through wires.

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