Power distribution system and power distribution method for energy storage system

Abstract

The application provides a power distribution system and a power distribution method of an energy storage system, comprising a first voltage conversion module, a first auxiliary power supply module, a second auxiliary power supply module and a third auxiliary power supply module: the first voltage conversion module is used for converting an alternating current input voltage into a direct current output voltage and supplying power to the first auxiliary power supply module, the second auxiliary power supply module and the third auxiliary power supply module respectively, and the direct current output voltage is smaller than the alternating current input voltage; the first auxiliary power supply module is used for supplying power to a fire-fighting auxiliary load with the direct current output voltage; the second auxiliary power supply module is used for supplying power to a high-voltage box and a monitoring load with the direct current output voltage; and the third auxiliary power supply module is used for supplying power to the high-voltage box, a control load, a switch load and a sensing load with the direct current output voltage. The power distribution can be completed through a lower direct current output voltage, which greatly improves the power distribution safety and reduces the cost.

Description

Technical Field

[0001] This application relates to the field of energy storage and power distribution technology, and in particular to a power distribution system and power distribution method for an energy storage system. Background Technology

[0002] An uninterruptible power supply (UPS) system mainly consists of battery banks, rectifiers and inverters, and static switches. Electrical energy is stored in the batteries in direct current (DC) form. The energy storage industry commonly uses 220V AC power distribution for UPS systems. However, due to the higher voltage, this poses safety hazards, is not well-suited for high-altitude environments, and is also costly. Summary of the Invention

[0003] In view of this, this application provides a power distribution system and method for an energy storage system, which can complete power distribution with a lower DC output voltage, greatly improving power distribution safety while reducing costs.

[0004] In a first aspect, embodiments of this application provide a power distribution system for an energy storage system, including a first voltage conversion module, a first auxiliary power supply module, a second auxiliary power supply module, and a third auxiliary power supply module, wherein the first voltage conversion module is respectively connected to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module. The first voltage conversion module is used to convert the AC input voltage into a DC output voltage and supply power to the first auxiliary power supply module, the second auxiliary power supply module and the third auxiliary power supply module respectively, wherein the DC output voltage is less than the AC input voltage; The first auxiliary power supply module is used to supply power to the fire auxiliary load with the DC output voltage; The second auxiliary power supply module is used to supply power to the high-voltage box and the monitoring load with the DC output voltage; The third auxiliary power supply module is used to supply power to the high-voltage box, control load, switching load and sensing load with the DC output voltage.

[0005] In one possible embodiment, the first voltage conversion module is connected to the mains power module via an input branch; The first voltage conversion module is connected to the first auxiliary power supply module through a first output branch, and the first output branch includes a first switch module; The first voltage conversion module is connected to the combiner module through the second output branch. The combiner module is connected to the second auxiliary power supply module through the first sub-branch. The combiner module is connected to the third auxiliary power supply module through the second sub-branch. The first sub-branch includes a second switch module, and the second sub-branch includes a third switch module.

[0006] In one possible embodiment, the first output branch includes a first positive transmission path and a first negative transmission path. The first port of the first voltage conversion module is connected to the first port of the first auxiliary power supply module through the first positive transmission path. The second port of the first voltage conversion module is connected to the second port of the first auxiliary power supply module through the first negative transmission path. The first switch module is connected in series with the first positive transmission path and / or the first negative transmission path. The second output branch includes a second positive transmission path and a second negative transmission path. The third port of the first voltage conversion module is connected to the positive bus port of the bus module through the second positive transmission path, and the fourth port of the first voltage conversion module is connected to the negative bus port of the bus module through the second negative transmission path. The first sub-branch includes a third positive transmission path and a third negative transmission path. The positive terminal is connected to the first port of the second auxiliary power supply module through the third positive transmission path. The negative terminal is connected to the second port of the second auxiliary power supply module through the third negative transmission path. The second switch module is connected in series with the third positive transmission path and / or the third negative transmission path. The second sub-branch includes a fourth positive transmission path and a fourth negative transmission path. The positive terminal is connected to the first port of the third auxiliary power supply module through the fourth positive transmission path, and the negative terminal is connected to the second port of the third auxiliary power supply module through the fourth negative transmission path. The third switch module is connected in series with the fourth positive transmission path and / or the fourth negative transmission path.

[0007] In one possible embodiment, the first auxiliary power supply module is configured with a first power, the second auxiliary power supply module is configured with a second power, and the third auxiliary power supply module is configured with a third power, wherein the first power is less than the second power and the third power.

[0008] In one possible embodiment, the first port of the first auxiliary power supply module is connected to the first port of the fire auxiliary load through a first positive power supply path, the second port of the first auxiliary power supply module is connected to the second port of the fire auxiliary load through a first negative power supply path, and the fourth switch module is connected in series to the first positive power supply path and / or the first negative power supply path.

[0009] In one possible embodiment, the first port of the second auxiliary power supply module is connected to the first port of the high voltage box through the second positive power supply path, the second port of the second auxiliary power supply module is connected to the second port of the high voltage box through the second negative power supply path, and the fifth switch module is connected in series to the second positive power supply path and / or the second negative power supply path; The first port of the second auxiliary power supply module is connected to the first port of the monitored load through the third positive power supply path, the second port of the second auxiliary power supply module is connected to the second port of the monitored load through the third negative power supply path, and the sixth switch module is connected in series to the third positive power supply path and / or the third negative power supply path.

[0010] In one possible embodiment, the first port of the third auxiliary power supply module is connected to the third port of the high-voltage box through the fourth positive power supply path, the second port of the third auxiliary power supply module is connected to the fourth port of the high-voltage box through the fourth negative power supply path, and the seventh switch module is connected in series to the fourth positive power supply path and / or the fourth negative power supply path. The first port of the third auxiliary power supply module is connected to the first port of the switch load through the fifth positive power supply path, the second port of the third auxiliary power supply module is connected to the second port of the switch load through the fifth negative power supply path, and the eighth switch module is connected in series with the fifth positive power supply path and / or the fifth negative power supply path; The first port of the third auxiliary power supply module is connected to the first port of the control load and the first port of the sensing load through the sixth positive power supply path, and the second port of the third auxiliary power supply module is connected to the second port of the control load and the second port of the sensing load through the sixth negative power supply path. The ninth switch module is connected in series to the sixth positive power supply path and / or the sixth negative power supply path.

[0011] Secondly, embodiments of this application provide a power distribution method for an energy storage system, applied to the power distribution system described in any of the first aspects of embodiments of this application, the method comprising: The first voltage conversion module converts the AC input voltage into a DC output voltage and supplies power to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The DC output voltage is less than the AC input voltage. The fire auxiliary load is powered by the DC output voltage through the first auxiliary power supply module; The second auxiliary power supply module supplies power to the high-voltage box and the monitoring load at the DC output voltage. The third auxiliary power supply module supplies power to the high-voltage box, control load, switching load and sensing load with the DC output voltage.

[0012] Thirdly, embodiments of this application provide an electronic device including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the programs include instructions for performing steps in any method of the second aspect of embodiments of this application.

[0013] Fourthly, embodiments of this application provide a computer storage medium, wherein the computer storage medium stores a computer program for electronic data interchange, wherein the computer program causes a computer to perform some or all of the steps described in any method of the second aspect of embodiments of this application.

[0014] Fifthly, embodiments of this application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps described in any method of the second aspect of this application. The computer program product may be a software installation package.

[0015] As can be seen, the power distribution system and method of the above-mentioned energy storage system include a first voltage conversion module, a first auxiliary power supply module, a second auxiliary power supply module, and a third auxiliary power supply module. The first voltage conversion module is connected to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The first voltage conversion module is used to convert the AC input voltage into a DC output voltage and supply power to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The DC output voltage is lower than the AC input voltage. The first auxiliary power supply module is used to supply power to the fire-fighting auxiliary load with the DC output voltage. The second auxiliary power supply module is used to supply power to the high-voltage box and the monitoring load with the DC output voltage. The third auxiliary power supply module is used to supply power to the high-voltage box, the control load, the switching load, and the sensing load with the DC output voltage. Implementing this application allows power distribution to be completed with a lower DC output voltage, greatly improving power distribution safety while reducing costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A system architecture diagram of a power distribution system for an energy storage system provided in this application embodiment; Figure 2 A system architecture diagram of the power distribution system for another energy storage system provided in this application embodiment; Figure 3 A partial structural example diagram of the power distribution system of an energy storage system provided in this application embodiment; Figure 4 This application provides a schematic diagram of the power supply structure of a first auxiliary power supply module according to an embodiment of the present application. Figure 5 This is a schematic diagram of the power supply structure of a second auxiliary power supply module provided in an embodiment of this application; Figure 6 A schematic diagram of the power supply structure of a third auxiliary power supply module provided in an embodiment of this application; Figure 7 A schematic flowchart illustrating a power distribution method for an energy storage system provided in an embodiment of this application; Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0018] Please see Figure 1 , Figure 1 The system architecture diagram of the power distribution system of an energy storage system provided in this application embodiment includes a first voltage conversion module 110, a first auxiliary power supply module 120, a second auxiliary power supply module 130 and a third auxiliary power supply module 140. The first voltage conversion module 110 is connected to the first auxiliary power supply module 120, the second auxiliary power supply module 130 and the third auxiliary power supply module 140 respectively.

[0019] The first voltage conversion module 110 is used to convert the AC input voltage into a DC output voltage and supply power to the first auxiliary power supply module 120, the second auxiliary power supply module 130 and the third auxiliary power supply module 140 respectively, wherein the DC output voltage is less than the AC input voltage.

[0020] The first auxiliary power supply module 120 is used to supply power to the fire auxiliary load with the DC output voltage; The second auxiliary power supply module 130 is used to supply power to the high-voltage box and the monitoring load with the DC output voltage; The third auxiliary power supply module 140 is used to supply power to the high-voltage box, control load, switching load and sensing load with the DC output voltage.

[0021] The first voltage conversion module 110 can be an AC-DC voltage conversion module that supports a wide voltage input. It can adopt active power factor correction and wide voltage topology design internally. The input range usually covers AC power from 90V to 305V. For example, it can be compatible with AC power input of 220V and 277V, and can stably output a lower DC voltage, such as 24V DC voltage. No specific limitation is made here.

[0022] The first auxiliary power supply module 120, the second auxiliary power supply module 130, and the third auxiliary power supply module 140 can be UPS. The first auxiliary power supply module 120 is configured with a first power rating, the second auxiliary power supply module 130 with a second power rating, and the third auxiliary power supply module 140 with a third power rating. The first power rating is lower than the second and third power ratings. Since the first auxiliary power supply module 120 supplies power to the fire-fighting auxiliary load, it essentially acts as a backup power module for the fire-fighting auxiliary load; therefore, its power rating can be lower, only needing to meet the rated and peak power requirements of the fire-fighting auxiliary load. The second auxiliary power supply module 130 and the third auxiliary power supply module 140, however, require higher power ratings because the rated and peak power of the loads they supply is higher. For example, the fire auxiliary load can be a fire fan with a rated power of 289.2W, and the first power can be 480W, which fully meets the requirements of the fire auxiliary load; the high-voltage box has a rated power of 59.4W and a peak power of 659.4W, and the monitoring load has a rated power of 30W and a peak power of 30W. The sum of the peak power of the high-voltage box and the monitoring load is 689.4W, and the second power can be 960W, which fully meets the requirements of the high-voltage box and the monitoring load; similarly, the sum of the peak power of the high-voltage box, control load, switch load and sensor load is much smaller than 960W, and the third power can be 960W.

[0023] Among them, the control load may include the display control module, the controller module, etc., the sensing load may include the dynamic environment sensor, etc., and the switching load may include the drive mechanism of the main switch of the bus module, etc., without specific limitations.

[0024] Please see Figure 2 , Figure 2The following is a system architecture diagram of the power distribution system of another energy storage system provided in this application embodiment. The first voltage conversion module 110 is connected to the mains power module through an input branch; the first voltage conversion module 110 is connected to the first auxiliary power supply module 120 through a first output branch, the first output branch including a first switch module QF1; the first voltage conversion module 110 is connected to the combiner module 150 through a second output branch, the combiner module 150 is connected to the second auxiliary power supply module 130 through a first sub-branch, the combiner module 150 is connected to the third auxiliary power supply module 140 through a second sub-branch, the first sub-branch including a second switch module QF2, and the second sub-branch including a third switch module QF3.

[0025] The AC power module can provide AC input voltage, and the bus module 150 can be a bus. Since the first sub-branch and the second sub-branch are physically isolated, the failure of the second auxiliary power supply module 130 will not affect the third auxiliary power supply module 140. Similarly, the failure of the third auxiliary power supply module 140 will not affect the second auxiliary power supply module 130.

[0026] Please see Figure 3 , Figure 3 This is a partial structural example diagram of the power distribution system of an energy storage system provided in an embodiment of this application. In this diagram, the first voltage conversion module is represented by AC-DC, the first auxiliary power supply module is represented by UPS1, the second auxiliary power supply module is represented by UPS2, and the third auxiliary power supply module is represented by UPS3.

[0027] The first output branch includes a first positive transmission path and a first negative transmission path. The first port +V1 of the first voltage conversion module ACDC is connected to the first port of the first auxiliary power supply module UPS1 through the first positive transmission path. The second port -V1 of the first voltage conversion module ACDC is connected to the second port of the first auxiliary power supply module UPS1 through the first negative transmission path. The first switch module QF1 is connected in series with the first positive transmission path and / or the first negative transmission path.

[0028] The second output branch includes a second positive transmission path and a second negative transmission path. The third port +V2 of the first voltage conversion module ACDC is connected to the positive bus port +V3 of the bus module through the second positive transmission path. The fourth port -V2 of the first voltage conversion module ACDC is connected to the negative bus port -V3 of the bus module through the second negative transmission path.

[0029] The first sub-branch includes a third positive transmission path and a third negative transmission path. The positive bus port +V3 is connected to the first port of the second auxiliary power supply module UPS2 through the third positive transmission path. The negative bus port -V3 is connected to the second port of the second auxiliary power supply module UPS2 through the third negative transmission path. The second switch module QF2 is connected in series to the third positive transmission path and / or the third negative transmission path.

[0030] The second sub-branch includes a fourth positive transmission path and a fourth negative transmission path. The positive bus port +V3 is connected to the first port of the third auxiliary power supply module UPS3 through the fourth positive transmission path. The negative bus port -V3 is connected to the second port of the third auxiliary power supply module UPS3 through the fourth negative transmission path. The third switch module QF3 is connected in series with the fourth positive transmission path and / or the fourth negative transmission path.

[0031] As can be seen, by setting up a switch module, the power can be cut off directly in case of any one of the first, second, or third auxiliary power supply modules failure, without affecting the normal operation of the other two power supply modules. The system does not need to be completely powered off, and the entire energy storage system does not need to be shut down.

[0032] Please see Figure 4 , Figure 4 This is a schematic diagram of the power supply structure of a first auxiliary power supply module provided in an embodiment of this application. The first port of the first auxiliary power supply module UPS1 is connected to the first port L of the fire auxiliary load through a first positive power supply path. The second port of the first auxiliary power supply module UPS1 is connected to the second port N of the fire auxiliary load through a first negative power supply path. The fourth switch module QF4 is connected in series to the first positive power supply path and / or the first negative power supply path.

[0033] Among them, the first port L of the fire auxiliary load can be the live wire port, and the second port N of the fire auxiliary load can be the neutral wire port.

[0034] The first auxiliary power supply module can serve as a backup power source for fire-fighting auxiliary loads.

[0035] The fourth switch module, connected in series with the first positive power supply path and / or the first negative power supply path, provides independent fault protection for the power supply branch of the fire auxiliary load. When a fault occurs in this branch, the fourth switch module can selectively trip, without affecting the upstream bus module and the first voltage conversion module, nor the normal operation of the second and third auxiliary power supply modules. Compared to traditional 220V AC backup power solutions, the 24V DC output voltage of UPS1 is a standard-defined extra-low voltage, making it suitable for high-altitude applications without the need for increased electrical clearances and creepage distances as in high-voltage solutions. It directly meets safety requirements for altitudes up to 5000m and is significantly cheaper than traditional solutions. Fault diagnosis is also safer, as the 24V voltage will not cause electric shock, greatly reducing the risk of electric shock during operation and maintenance.

[0036] Please see Figure 5 , Figure 5 This is a schematic diagram of the power supply structure of a second auxiliary power supply module provided in an embodiment of this application. The first port of the second auxiliary power supply module UPS2 is connected to the first port of the high-voltage box, i.e., the live wire port L, through a second positive power supply path (24V+). The second port of the second auxiliary power supply module UPS2 is connected to the second port of the high-voltage box, i.e., the neutral wire port N, through a second negative power supply path (24V-). The fifth switch module QF5 is connected in series with the second positive power supply path and / or the second negative power supply path. The first port of the second auxiliary power supply module UPS2 is connected to the first port of the monitored load, i.e., the live wire port L, through the third positive power supply path. The second port of the second auxiliary power supply module is connected to the second port of the monitored load, i.e., the neutral wire port N, through the third negative power supply path. The sixth switch module QF6 is connected in series to the third positive power supply path and / or the third negative power supply path.

[0037] In this embodiment, by configuring two independent power supply paths for the second auxiliary power supply module UPS2, and setting independent switch modules QF5 and QF6 on their respective positive paths, physical isolation and selective protection of the high-voltage box control power supply and the monitoring load power supply are achieved. This not only ensures that the other branch can continue to work when any load branch fails, but also supports online non-stop maintenance, which greatly improves the reliability, safety and maintainability of the energy storage system power supply, and provides a unified power distribution architecture for standardized deployment in different certification regions around the world.

[0038] Please see Figure 6 , Figure 6This is a schematic diagram of the power supply structure of a third auxiliary power supply module provided in an embodiment of this application. The first port of the third auxiliary power supply module UPS3 is connected to the third port of the high-voltage box through the fourth positive power supply path (24V+). The second port of the third auxiliary power supply module UPS3 is connected to the fourth port of the high-voltage box through the fourth negative power supply path (24V-). The seventh switch module QF7 is connected in series to the fourth positive power supply path and / or the fourth negative power supply path.

[0039] The first port of the third auxiliary power supply module UPS3 is connected to the first port of the switching load via the fifth positive power supply path, and the second port of the third auxiliary power supply module UPS3 is connected to the second port of the switching load via the fifth negative power supply path. The eighth switch module QF8 is connected in series with the fifth positive power supply path and / or the fifth negative power supply path. The switching load can be the main switch of the combiner module.

[0040] The third auxiliary power supply module UPS3 has its first port connected to both the first port of the control load and the first port of the sensing load via a sixth positive power supply path. The second port of the third auxiliary power supply module is connected to both the second port of the control load and the second port of the sensing load via a sixth negative power supply path. The ninth switch module QF9 is connected in series with the sixth positive power supply path and / or the sixth negative power supply path. The control load includes a display controller and a control unit, and the sensing load can be a dynamic environmental sensor.

[0041] In one possible embodiment, the first port of the third auxiliary power supply module UPS3 is connected to the mains power switch trip KA5 via the sixth positive power supply path, and KA5 is connected to the mains power switch QF. The second port of the third auxiliary power supply module is connected to the mains power switch QF via the sixth negative power supply path.

[0042] In this embodiment, the third auxiliary power supply module UPS3 can provide 24V safe voltage backup power to the high-voltage box, combiner cabinet main switch, control and sensing loads, and mains power switch trip unit through four independent power supply paths. Independent switch protection devices are set on the positive path of each branch, realizing centralized, isolated, and maintainable backup power management of all switch actuators on the AC and DC sides of the energy storage system. While ensuring reliable disconnection of the entire link in an emergency, it greatly improves the maintainability and safety compliance rate of the system.

[0043] As can be seen, the power distribution system and method of the above-mentioned energy storage system include a first voltage conversion module, a first auxiliary power supply module, a second auxiliary power supply module, and a third auxiliary power supply module. The first voltage conversion module is connected to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The first voltage conversion module is used to convert the AC input voltage into a DC output voltage and supply power to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The DC output voltage is lower than the AC input voltage. The first auxiliary power supply module is used to supply power to the fire-fighting auxiliary load with the DC output voltage. The second auxiliary power supply module is used to supply power to the high-voltage box and the monitoring load with the DC output voltage. The third auxiliary power supply module is used to supply power to the high-voltage box, the control load, the switching load, and the sensing load with the DC output voltage. Implementing this application allows power distribution to be completed with a lower DC output voltage, greatly improving power distribution safety while reducing costs.

[0044] Please see Figure 7 , Figure 7 A schematic flowchart of a power distribution method for an energy storage system provided in this application embodiment, applied to the power distribution system described in this application embodiment, the method includes: Step 701: The AC input voltage is converted into DC output voltage by the first voltage conversion module and then used to supply power to the first auxiliary power supply module, the second auxiliary power supply module and the third auxiliary power supply module respectively.

[0045] The DC output voltage is less than the AC input voltage.

[0046] Step 702: Power the fire auxiliary load with the DC output voltage through the first auxiliary power supply module.

[0047] Step 703: Power the high-voltage box and the monitoring load with the DC output voltage through the second auxiliary power supply module.

[0048] Step 704: Power the high-voltage box, control load, switching load and sensing load with the DC output voltage through the third auxiliary power supply module.

[0049] In one possible embodiment, the first voltage conversion module is connected to the mains power module via an input branch; The first voltage conversion module is connected to the first auxiliary power supply module through a first output branch, and the first output branch includes a first switch module; The first voltage conversion module is connected to the combiner module through the second output branch. The combiner module is connected to the second auxiliary power supply module through the first sub-branch. The combiner module is connected to the third auxiliary power supply module through the second sub-branch. The first sub-branch includes a second switch module, and the second sub-branch includes a third switch module.

[0050] In one possible embodiment, the first output branch includes a first positive transmission path and a first negative transmission path. The first port of the first voltage conversion module is connected to the first port of the first auxiliary power supply module through the first positive transmission path. The second port of the first voltage conversion module is connected to the second port of the first auxiliary power supply module through the first negative transmission path. The first switch module is connected in series with the first positive transmission path and / or the first negative transmission path. The second output branch includes a second positive transmission path and a second negative transmission path. The third port of the first voltage conversion module is connected to the positive bus port of the bus module through the second positive transmission path, and the fourth port of the first voltage conversion module is connected to the negative bus port of the bus module through the second negative transmission path. The first sub-branch includes a third positive transmission path and a third negative transmission path. The positive terminal is connected to the first port of the second auxiliary power supply module through the third positive transmission path. The negative terminal is connected to the second port of the second auxiliary power supply module through the third negative transmission path. The second switch module is connected in series with the third positive transmission path and / or the third negative transmission path. The second sub-branch includes a fourth positive transmission path and a fourth negative transmission path. The positive terminal is connected to the first port of the third auxiliary power supply module through the fourth positive transmission path, and the negative terminal is connected to the second port of the third auxiliary power supply module through the fourth negative transmission path. The third switch module is connected in series with the fourth positive transmission path and / or the fourth negative transmission path.

[0051] In one possible embodiment, the first auxiliary power supply module is configured with a first power, the second auxiliary power supply module is configured with a second power, and the third auxiliary power supply module is configured with a third power, wherein the first power is less than the second power and the third power.

[0052] In one possible embodiment, the first port of the first auxiliary power supply module is connected to the first port of the fire auxiliary load through a first positive power supply path, the second port of the first auxiliary power supply module is connected to the second port of the fire auxiliary load through a first negative power supply path, and the fourth switch module is connected in series to the first positive power supply path and / or the first negative power supply path.

[0053] In one possible embodiment, the first port of the second auxiliary power supply module is connected to the first port of the high voltage box through the second positive power supply path, the second port of the second auxiliary power supply module is connected to the second port of the high voltage box through the second negative power supply path, and the fifth switch module is connected in series to the second positive power supply path and / or the second negative power supply path; The first port of the second auxiliary power supply module is connected to the first port of the monitored load through the third positive power supply path, the second port of the second auxiliary power supply module is connected to the second port of the monitored load through the third negative power supply path, and the sixth switch module is connected in series to the third positive power supply path and / or the third negative power supply path.

[0054] In one possible embodiment, the first port of the third auxiliary power supply module is connected to the third port of the high-voltage box through the fourth positive power supply path, the second port of the third auxiliary power supply module is connected to the fourth port of the high-voltage box through the fourth negative power supply path, and the seventh switch module is connected in series to the fourth positive power supply path and / or the fourth negative power supply path. The first port of the third auxiliary power supply module is connected to the first port of the switch load through the fifth positive power supply path, the second port of the third auxiliary power supply module is connected to the second port of the switch load through the fifth negative power supply path, and the eighth switch module is connected in series with the fifth positive power supply path and / or the fifth negative power supply path; The first port of the third auxiliary power supply module is connected to the first port of the control load and the first port of the sensing load through the sixth positive power supply path, and the second port of the third auxiliary power supply module is connected to the second port of the control load and the second port of the sensing load through the sixth negative power supply path. The ninth switch module is connected in series to the sixth positive power supply path and / or the sixth negative power supply path.

[0055] Among them, it can independently control the disconnection of any one of the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth switch modules. It can precisely disconnect only the faulty branch while the other equipment continues to operate normally, forming a hierarchical protection. When a branch is overloaded, the switch module of that branch will trip first, and will not trigger the tripping of the upstream main switch, thus avoiding the expansion of the fault.

[0056] As can be seen, the power distribution system and method of the above-mentioned energy storage system include a first voltage conversion module, a first auxiliary power supply module, a second auxiliary power supply module, and a third auxiliary power supply module. The first voltage conversion module is connected to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The first voltage conversion module is used to convert the AC input voltage into a DC output voltage and supply power to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The DC output voltage is lower than the AC input voltage. The first auxiliary power supply module is used to supply power to the fire-fighting auxiliary load with the DC output voltage. The second auxiliary power supply module is used to supply power to the high-voltage box and the monitoring load with the DC output voltage. The third auxiliary power supply module is used to supply power to the high-voltage box, the control load, the switching load, and the sensing load with the DC output voltage. Implementing this application allows power distribution to be completed with a lower DC output voltage, greatly improving power distribution safety while reducing costs.

[0057] The following is combined with Figure 8 An electronic device according to an embodiment of this application will be described. Figure 8 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. The electronic device 800 includes a processor 801, a memory 802, and a communication bus 803 for connecting the processor 801 and the memory 802.

[0058] In some possible implementations, memory 802 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact discread-only memory (CD-ROM), which is used to store program code executed by electronic device 800 and data transmitted therefrom.

[0059] In some possible implementations, the electronic device 800 also includes a communication interface for receiving and sending data.

[0060] In some possible implementations, processor 801 may be one or more central processing units (CPUs). If processor 801 is a central processing unit (CPU), the central processing unit (CPU) may be a single-core central processing unit (CPU) or a multi-core central processing unit (CPU).

[0061] In some possible implementations, processor 801 can be a baseband chip, a chip, a central processing unit (CPU), a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. A power distribution system applied to an energy storage system includes a first voltage conversion module, a first auxiliary power supply module, a second auxiliary power supply module, and a third auxiliary power supply module. The first voltage conversion module is connected to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The first voltage conversion module is used to convert AC input voltage into DC output voltage and supply power to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively, wherein the DC output voltage is less than the AC input voltage. The first auxiliary power supply module is used to supply power to fire-fighting auxiliary loads with the DC output voltage. The second auxiliary power supply module is used to supply power to the high-voltage box and monitoring loads with the DC output voltage. The third auxiliary power supply module is used to supply power to the high-voltage box, control loads, switching loads, and sensing loads with the DC output voltage. In a specific implementation, processor 801 in electronic device 800 is used to execute program instructions 821 stored in memory 802 to perform the following operations: The first voltage conversion module converts the AC input voltage into a DC output voltage and supplies power to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The DC output voltage is less than the AC input voltage. The fire auxiliary load is powered by the DC output voltage through the first auxiliary power supply module; The second auxiliary power supply module supplies power to the high-voltage box and the monitoring load at the DC output voltage. The third auxiliary power supply module supplies power to the high-voltage box, control load, switching load and sensing load with the DC output voltage.

[0062] In one possible embodiment, the first voltage conversion module is connected to the mains power module via an input branch; The first voltage conversion module is connected to the first auxiliary power supply module through a first output branch, and the first output branch includes a first switch module; The first voltage conversion module is connected to the combiner module through the second output branch. The combiner module is connected to the second auxiliary power supply module through the first sub-branch. The combiner module is connected to the third auxiliary power supply module through the second sub-branch. The first sub-branch includes a second switch module, and the second sub-branch includes a third switch module.

[0063] In one possible embodiment, the first output branch includes a first positive transmission path and a first negative transmission path. The first port of the first voltage conversion module is connected to the first port of the first auxiliary power supply module through the first positive transmission path. The second port of the first voltage conversion module is connected to the second port of the first auxiliary power supply module through the first negative transmission path. The first switch module is connected in series with the first positive transmission path and / or the first negative transmission path. The second output branch includes a second positive transmission path and a second negative transmission path. The third port of the first voltage conversion module is connected to the positive bus port of the bus module through the second positive transmission path, and the fourth port of the first voltage conversion module is connected to the negative bus port of the bus module through the second negative transmission path. The first sub-branch includes a third positive transmission path and a third negative transmission path. The positive terminal is connected to the first port of the second auxiliary power supply module through the third positive transmission path. The negative terminal is connected to the second port of the second auxiliary power supply module through the third negative transmission path. The second switch module is connected in series with the third positive transmission path and / or the third negative transmission path. The second sub-branch includes a fourth positive transmission path and a fourth negative transmission path. The positive terminal is connected to the first port of the third auxiliary power supply module through the fourth positive transmission path, and the negative terminal is connected to the second port of the third auxiliary power supply module through the fourth negative transmission path. The third switch module is connected in series with the fourth positive transmission path and / or the fourth negative transmission path.

[0064] In one possible embodiment, the first auxiliary power supply module is configured with a first power, the second auxiliary power supply module is configured with a second power, and the third auxiliary power supply module is configured with a third power, wherein the first power is less than the second power and the third power.

[0065] In one possible embodiment, the first port of the first auxiliary power supply module is connected to the first port of the fire auxiliary load through a first positive power supply path, the second port of the first auxiliary power supply module is connected to the second port of the fire auxiliary load through a first negative power supply path, and the fourth switch module is connected in series to the first positive power supply path and / or the first negative power supply path.

[0066] In one possible embodiment, the first port of the second auxiliary power supply module is connected to the first port of the high voltage box through the second positive power supply path, the second port of the second auxiliary power supply module is connected to the second port of the high voltage box through the second negative power supply path, and the fifth switch module is connected in series to the second positive power supply path and / or the second negative power supply path; The first port of the second auxiliary power supply module is connected to the first port of the monitored load through the third positive power supply path, the second port of the second auxiliary power supply module is connected to the second port of the monitored load through the third negative power supply path, and the sixth switch module is connected in series to the third positive power supply path and / or the third negative power supply path.

[0067] In one possible embodiment, the first port of the third auxiliary power supply module is connected to the third port of the high-voltage box through the fourth positive power supply path, the second port of the third auxiliary power supply module is connected to the fourth port of the high-voltage box through the fourth negative power supply path, and the seventh switch module is connected in series to the fourth positive power supply path and / or the fourth negative power supply path. The first port of the third auxiliary power supply module is connected to the first port of the switch load through the fifth positive power supply path, the second port of the third auxiliary power supply module is connected to the second port of the switch load through the fifth negative power supply path, and the eighth switch module is connected in series with the fifth positive power supply path and / or the fifth negative power supply path; The first port of the third auxiliary power supply module is connected to the first port of the control load and the first port of the sensing load through the sixth positive power supply path, and the second port of the third auxiliary power supply module is connected to the second port of the control load and the second port of the sensing load through the sixth negative power supply path. The ninth switch module is connected in series to the sixth positive power supply path and / or the sixth negative power supply path.

[0068] As can be seen, the power distribution system and method of the above-mentioned energy storage system include a first voltage conversion module, a first auxiliary power supply module, a second auxiliary power supply module, and a third auxiliary power supply module. The first voltage conversion module is connected to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The first voltage conversion module is used to convert the AC input voltage into a DC output voltage and supply power to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The DC output voltage is lower than the AC input voltage. The first auxiliary power supply module is used to supply power to the fire-fighting auxiliary load with the DC output voltage. The second auxiliary power supply module is used to supply power to the high-voltage box and the monitoring load with the DC output voltage. The third auxiliary power supply module is used to supply power to the high-voltage box, the control load, the switching load, and the sensing load with the DC output voltage. Implementing this application allows power distribution to be completed with a lower DC output voltage, greatly improving power distribution safety while reducing costs.

[0069] It should be noted that the specific implementation of each operation can be described in the corresponding description of the method embodiments shown above. The electronic device 800 can be used to execute the above method embodiments of this application, and will not be described again here.

[0070] The above primarily describes the solutions of the embodiments of this application from the perspective of the method execution process. It is understood that, in order to achieve the above functions, the electronic device includes corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments provided herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0071] This application embodiment can divide the electronic device into functional units according to the above method example. For example, each function can be divided into a separate functional unit, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software functional unit. It should be noted that the unit division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0072] This application also provides a computer storage medium storing a computer program for electronic data interchange, which causes a computer to perform some or all of the steps of any of the methods described in the above method embodiments, wherein the computer includes an electronic device.

[0073] This application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods described in the above method embodiments. The computer program product may be a software installation package, and the computer may include an electronic device.

Claims

1. A power distribution system for an energy storage system, characterized in that, It includes a first voltage conversion module, a first auxiliary power supply module, a second auxiliary power supply module, and a third auxiliary power supply module, wherein the first voltage conversion module is connected to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The first voltage conversion module is used to convert the AC input voltage into a DC output voltage and supply power to the first auxiliary power supply module, the second auxiliary power supply module and the third auxiliary power supply module respectively, wherein the DC output voltage is less than the AC input voltage; The first auxiliary power supply module is used to supply power to the fire auxiliary load with the DC output voltage; The second auxiliary power supply module is used to supply power to the high-voltage box and the monitoring load with the DC output voltage; The third auxiliary power supply module is used to supply power to the high-voltage box, control load, switching load and sensing load with the DC output voltage.

2. The power distribution system according to claim 1, characterized in that, The first voltage conversion module is connected to the mains power module via an input branch; The first voltage conversion module is connected to the first auxiliary power supply module through a first output branch, and the first output branch includes a first switch module; The first voltage conversion module is connected to the combiner module through the second output branch. The combiner module is connected to the second auxiliary power supply module through the first sub-branch. The combiner module is connected to the third auxiliary power supply module through the second sub-branch. The first sub-branch includes a second switch module, and the second sub-branch includes a third switch module.

3. The power distribution system according to claim 2, characterized in that, The first output branch includes a first positive transmission path and a first negative transmission path. The first port of the first voltage conversion module is connected to the first port of the first auxiliary power supply module through the first positive transmission path. The second port of the first voltage conversion module is connected to the second port of the first auxiliary power supply module through the first negative transmission path. The first switch module is connected in series with the first positive transmission path and / or the first negative transmission path. The second output branch includes a second positive transmission path and a second negative transmission path. The third port of the first voltage conversion module is connected to the positive bus port of the bus module through the second positive transmission path, and the fourth port of the first voltage conversion module is connected to the negative bus port of the bus module through the second negative transmission path. The first sub-branch includes a third positive transmission path and a third negative transmission path. The positive terminal is connected to the first port of the second auxiliary power supply module through the third positive transmission path. The negative terminal is connected to the second port of the second auxiliary power supply module through the third negative transmission path. The second switch module is connected in series with the third positive transmission path and / or the third negative transmission path. The second sub-branch includes a fourth positive transmission path and a fourth negative transmission path. The positive terminal is connected to the first port of the third auxiliary power supply module through the fourth positive transmission path, and the negative terminal is connected to the second port of the third auxiliary power supply module through the fourth negative transmission path. The third switch module is connected in series with the fourth positive transmission path and / or the fourth negative transmission path.

4. The power distribution system according to any one of claims 1-3, characterized in that, The first auxiliary power supply module is configured with a first power, the second auxiliary power supply module is configured with a second power, and the third auxiliary power supply module is configured with a third power, wherein the first power is less than the second power and the third power.

5. The power distribution system according to any one of claims 1-3, characterized in that, The first port of the first auxiliary power supply module is connected to the first port of the fire auxiliary load through the first positive power supply path, and the second port of the first auxiliary power supply module is connected to the second port of the fire auxiliary load through the first negative power supply path. The fourth switch module is connected in series to the first positive power supply path and / or the first negative power supply path.

6. The power distribution system according to any one of claims 1-3, characterized in that, The first port of the second auxiliary power supply module is connected to the first port of the high voltage box through the second positive power supply path, and the second port of the second auxiliary power supply module is connected to the second port of the high voltage box through the second negative power supply path. The fifth switch module is connected in series with the second positive power supply path and / or the second negative power supply path. The first port of the second auxiliary power supply module is connected to the first port of the monitored load through the third positive power supply path, the second port of the second auxiliary power supply module is connected to the second port of the monitored load through the third negative power supply path, and the sixth switch module is connected in series to the third positive power supply path and / or the third negative power supply path.

7. The power distribution system according to any one of claims 1-3, characterized in that, The first port of the third auxiliary power supply module is connected to the third port of the high voltage box through the fourth positive power supply path, the second port of the third auxiliary power supply module is connected to the fourth port of the high voltage box through the fourth negative power supply path, and the seventh switch module is connected in series to the fourth positive power supply path and / or the fourth negative power supply path. The first port of the third auxiliary power supply module is connected to the first port of the switch load through the fifth positive power supply path, the second port of the third auxiliary power supply module is connected to the second port of the switch load through the fifth negative power supply path, and the eighth switch module is connected in series with the fifth positive power supply path and / or the fifth negative power supply path; The first port of the third auxiliary power supply module is connected to the first port of the control load and the first port of the sensing load through the sixth positive power supply path, and the second port of the third auxiliary power supply module is connected to the second port of the control load and the second port of the sensing load through the sixth negative power supply path. The ninth switch module is connected in series to the sixth positive power supply path and / or the sixth negative power supply path.

8. A power distribution method for an energy storage system, characterized in that, Applied to the power distribution system according to any one of claims 1-7, the method comprises: The first voltage conversion module converts the AC input voltage into a DC output voltage and supplies power to the first auxiliary power supply module, the second auxiliary power supply module, and the third auxiliary power supply module respectively. The DC output voltage is less than the AC input voltage. The fire auxiliary load is powered by the DC output voltage through the first auxiliary power supply module; The second auxiliary power supply module supplies power to the high-voltage box and the monitoring load at the DC output voltage. The third auxiliary power supply module supplies power to the high-voltage box, control load, switching load and sensing load with the DC output voltage.

9. An electronic device, characterized in that, include: A processor, a memory, and one or more programs; the one or more programs are stored in the memory and configured to be executed by the processor, the programs including instructions for performing the steps of the method as described in claim 8.

10. A computer storage medium, characterized in that, The computer storage medium stores a computer program, the computer program including program instructions, which, when executed by a processor, cause the processor to perform the method as described in claim 8.

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