Mobile energy storage power distribution system

Abstract

The utility model discloses a mobile energy storage power distribution system which comprises a direct current battery unit, an alternating current unit, a convergence cabinet, a PCS all-in-one machine and a direct current charging unit. Wherein the direct-current battery unit is used for storing electric energy and outputting direct current and alternating current to the outside; the alternating current unit comprises an alternating current load output end and a standby alternating current power supply, and the alternating current load output end is used for outputting alternating current; the confluence cabinet is connected with the direct-current battery unit; the PCS all-in-one machine is connected with the confluence cabinet; the direct current charging unit is connected with the PCS all-in-one machine and the confluence cabinet, and can charge the direct current battery unit and provide a standby power supply for an alternating current load output end at the same time; and the standby AC power supply is also respectively connected with the confluence cabinet and the PCS all-in-one machine, so that the standby AC power supply can be provided for the system through the confluence cabinet, and the AC power can be output for the system through the PCS all-in-one machine. The system can be applied to more occasions, and meanwhile, the operation reliability of the system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of energy storage power distribution, more specifically, to a mobile energy storage power distribution system. BACKGROUND

[0002] With the further requirement of the society on power supply reliability, mobile energy storage emerges as the times require, providing a clean, flexible and reliable power supply mode, compared with traditional power consumption, providing a more convenient power consumption mode. UTILITY MODEL CONTENT

[0003] The utility model provides a mobile energy storage power distribution system, DC system is configured for the busbar cabinet, can output AC through the DC system, so that the system can be applied to more occasions.

[0004] To achieve the above purpose, the technical scheme provided by the utility model is:

[0005] A mobile energy storage power distribution system, characterized by comprising:

[0006] DC battery unit for storing electrical energy and outputting DC and AC to the outside;

[0007] AC unit, comprising AC load output end and standby AC power supply, the AC load output end is used for outputting AC;

[0008] Busbar cabinet, connected with the DC battery unit;

[0009] PCS all-in-one machine, connected with the busbar cabinet;

[0010] DC charging unit, connected with the PCS all-in-one machine and busbar cabinet, can charge the DC battery unit and provide standby power supply for the AC load output end;

[0011] The standby AC power supply is also connected with the busbar cabinet and PCS all-in-one machine, can provide standby AC power supply for the system through the busbar cabinet, and can output AC for the system through the PCS all-in-one machine.

[0012] In the scheme, the DC battery unit outputs the required DC for the system, and can also provide AC for the AC load output end through the PCS unit. In addition, the DC charging unit can charge the battery pack in the DC battery unit, and in some cases, can also convert AC for the AC load output end through the PCS unit. This system can be applied to more occasions, and also improves the reliability of the system operation.

[0013] As a further improvement, the PCS all-in-one machine comprises a PCS unit and an energy storage cabin, the energy storage cabin is used for installing a direct current battery unit, and the PCS unit is integrated in the energy storage cabin, so that the energy storage cabin can store energy and provide direct current to the outside while also outputting alternating current.

[0014] As a further improvement, the direct current battery unit comprises a plurality of battery packs and a high-voltage box; a plurality of the battery packs are connected with one high-voltage box, and the high-voltage box is connected with a bus cabinet.

[0015] As a further improvement, the bus cabinet is provided with a disconnecting switch for on-off of the direct current battery unit. The direct current battery unit is protected during normal use.

[0016] As a further improvement, a BMS management module is further included, and the BMS management module comprises a dry node, an RS484 communication interface, a CAN communication interface and a network interface.

[0017] As a further improvement, a charging gun is arranged in the direct current charging unit, and an output end of the charging gun is directly connected to the disconnecting switch. In this way, the disconnecting switch can still provide protection for the direct current battery unit during charging.

[0018] The direct current battery unit further comprises a UPS unit, the UPS unit comprises a UPS module, and the UPS module is connected with the alternating current load output end. A double-break switch is further connected between the UPS module and the alternating current load output end, and the standby alternating current power supply is further connected to the double-break switch. The double-break switch connected with the UPS module is connected with the alternating current load output end and the standby alternating current power supply respectively. In a normal working condition, the alternating current load output end can provide alternating current power supply for the UPS module; in the case that the alternating current load output end is cut off, the double-break switch is automatically switched to be connected to the standby alternating current power supply, so that the power supply of the UPS module is ensured not to be interrupted.

[0019] Other technical problems, other technical features contained in the technical solutions and advantages brought by these technical features that can be solved by the mobile energy storage power distribution system will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a principle diagram of the mobile energy storage power distribution system;

[0021] Figure 2 It is a schematic diagram of taking power by a load device;

[0022] Figure 3 It is a BMS management schematic diagram.

[0023] Label explanation:

[0024] 1. PCS all-in-one unit; 2. Combiner cabinet; 3. Battery pack; 4. High voltage box; 100. DC battery unit; 200. AC output unit. Detailed Implementation

[0025] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0026] The structures, proportions, and sizes illustrated in the accompanying drawings are solely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0027] This embodiment provides a mobile energy storage and power distribution system, including a DC battery unit 100, an AC unit 200, a combiner cabinet 2, a PCS integrated machine 1, and a DC charging unit.

[0028] like Figure 1 As shown, the DC battery unit 100 is used to store electrical energy and output DC power. The AC unit 200 includes an AC load output terminal and a backup AC power supply; the AC load output terminal is used to output AC power. A combiner cabinet 2 is connected to the DC battery unit 100. A PCS integrated unit 1 is connected to the combiner cabinet 2. A DC charging unit is connected to both the PCS integrated unit 1 and the combiner cabinet 2, capable of charging the DC battery unit 100 and providing backup power to the AC load output terminal. The backup AC power supply is also connected to both the combiner cabinet 2 and the PCS integrated unit 1, enabling it to provide backup AC power to the system via both the combiner cabinet 2 and the PCS integrated unit 1.

[0029] In this solution, the DC battery unit 100 can provide AC power to the AC load output, enabling the power distribution system to be used in more applications. Furthermore, this solution also includes a backup AC power supply; additionally, while the DC battery unit 100 is charging, it can provide backup power to the AC load output, forming multiple backup power sources and improving the reliability of the power distribution system.

[0030] As a further improvement, the PCS all-in-one machine 1 comprises a PCS unit and an energy storage cabin, the energy storage cabin is used for mounting the DC battery unit 100, and the PCS unit is integrated in the energy storage cabin. The PCS unit is an energy storage converter, which is provided with a DC / AC bidirectional converter and other components, and can convert DC power into stable AC power, and can also convert AC power into stable DC power. Through the AC / DC conversion of the PCS unit, the required AC / DC power can be obtained.

[0031] In addition, the PCS unit is integrated in the energy storage cabin, which is a distributed design compared with the traditional energy storage cabin. Each energy storage cabin is a DC battery unit, and can only provide DC power. The AC power required by the power distribution system can only be supplied by an external power source or a commercial power supply, which greatly limits the application scenarios of the power distribution system. In this scheme, the PCS unit is integrated in the energy storage cabin, and the AC power required by the power distribution system can be converted and output by the PCS unit in the energy storage cabin, so that power supply can be provided for various AC devices in the power distribution system at any time.

[0032] Preferably, the DC battery unit 100 comprises a plurality of battery packs 3 and a high-voltage box 4. A plurality of battery packs 3 are connected with one high-voltage box 4, and the high-voltage box 4 is connected with the busbar cabinet 2. The busbar cabinet 2 is also provided with a disconnecting switch for the on-off of the DC battery unit 100. Specifically, the battery packs 3 in the energy storage cabin are first connected in parallel to one high-voltage box, and then the DC cables of each high-voltage box are connected in parallel again to finally reach the specified capacity of the energy storage cabin. Then the DC cables are connected to the disconnecting switch, and the disconnecting switch can be turned on and off in time when the power consumption of the power distribution system is abnormal, so as to protect the DC battery unit 100.

[0033] The battery packs 3 in the DC battery unit 100 are energy storage batteries. In order to facilitate charging, the DC charging unit is provided with a charging gun, which can conveniently and quickly charge the battery packs in the energy storage cabin. The output end of the charging gun is directly connected to the disconnecting switch, so that the disconnecting switch can also provide real-time protection for the battery packs during the charging process.

[0034] In combination with Figure 3As shown, the mobile energy storage power distribution system further comprises a BMS management module, which comprises a dry node, an RS484 communication interface, a CAN communication interface and a network interface. The BMS management module is used to collect and process various information in the energy storage cabin, and is connected to the outside through the dry node, the RS484 communication interface, the CAN communication interface and the network interface. Here, the BMS management module adopts a three-level architecture, wherein the first-level BMS is used to detect the voltage, temperature and other parameters of each battery monomer in the battery pack in real time, and the data is transmitted to the second-level BMS in the high-voltage box. The second-level BMS collects and aggregates the voltage and current of the battery cluster, and then outputs to the third-level BMS for communication management. This hierarchical architecture enables the BMS management module to output and control various information in the cabin.

[0035] The dry node in the BMS management module can be used to control the main switch, status indicator light, contactor, fault alarm and PCS in the management system. The RS484 communication interface can be connected with the display screen, temperature and humidity sensor, liquid cooling machine, air conditioner and fire-fighting equipment. The CAN communication interface can be connected with the high-voltage box, DC charging gun seat and AC discharge gun seat. The network interface can be connected with the 4G module and the PCS.

[0036] Further, the mobile energy storage power distribution system further comprises a UPS unit, which comprises a UPS module and an AC load output end. The UPS module and the AC load output end are further connected with a double-break switch, and the double-break switch is further connected with the standby AC power supply. See Figure 2 As shown, in a specific case, the power distribution and power taking place is connected with the AC load output end, and the standby 220V power supply is provided by the standby AC power supply.

[0037] The UPS module is connected with the double-break switch, which is connected with the AC load output end and the standby AC power supply, respectively. In normal working conditions, the AC load output end can provide AC power supply for the UPS module; in the case that the AC load output end is cut off, the double-break switch is automatically switched to the standby AC power supply, so as to ensure that the power supply of the UPS module will not be interrupted. Figure 2

[0038] The mobile energy storage power distribution system in the present scheme combines Figure 1 and Figure 2 ​As shown, the standby AC power supply can supply power for the UPS module, charge the battery pack when the DC charging unit cannot supply power in time, and provide power for the AC load output through the PCS unit. The DC battery unit 100 supplies DC power required by the system output, and also supplies AC power for the AC load output through the PCS unit. In addition, the DC charging unit can charge the battery pack in the DC battery unit 100, and in some cases, can also supply AC power for the AC load output through the PCS unit. The above makes the system applicable to more occasions, and also improves the reliability of the system operation.

[0039] The terms "mount", "set", "provided with", and "connected" should be understood in a broad sense. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication between two devices, elements or components. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0040] The above describes the utility model and its embodiments in a schematic manner, which is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the utility model, and the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by the above, without departing from the creative spirit of the utility model, similar structural modes and embodiments can be designed without creativity, which should all belong to the protection scope of the utility model.

Claims

1. A mobile energy storage power distribution system, characterized by, The utility model relates to a kind of integrated PCS, including: DC battery unit (100) for storing electrical energy and outputting DC and AC power externally; AC unit (200) including AC load output end and standby AC power supply, the AC load output end is used to output AC power; Busbar cabinet (2) connected with the DC battery unit (100); PCS integrated machine (1) connected with the busbar cabinet (2); DC charging unit connected with the PCS integrated machine (1) and busbar cabinet (2), which can charge the DC battery unit (100) while providing backup power supply for AC load output end; The standby AC power supply is also connected with the busbar cabinet (2) and PCS integrated machine (1) respectively, which can provide backup AC power supply for the system through busbar cabinet (2), and also can output AC power for the system through PCS integrated machine (1).

2. The mobile energy storage power distribution system of claim 1, wherein: The PCS integrated machine (1) includes PCS unit and energy storage cabin, the energy storage cabin is used to install DC battery unit (100), and the PCS unit is integrated in the energy storage cabin.

3. The mobile energy storage power distribution system of claim 1, wherein: The DC battery unit (100) includes a plurality of battery packs (3) and high-voltage boxes (4); A plurality of battery packs (3) are connected with a high-voltage box (4), and the high-voltage box (4) is connected with the busbar cabinet (2).

4. The mobile energy storage power distribution system of claim 3, wherein: The busbar cabinet (2) is provided with a disconnecting switch for the on-off of the DC battery unit (100).

5. Mobile energy storage power distribution system according to any of claims 1-4, characterized in that: It also includes a BMS management module, which includes a dry node, an RS484 communication interface, a CAN communication interface and a network interface.

6. The mobile energy storage power distribution system of claim 4, wherein: The DC charging unit is provided with a charging gun, wherein the output end of the charging gun is directly connected to the disconnecting switch.

7. The mobile energy storage power distribution system of claim 5, wherein: It also includes a UPS unit, which includes a UPS module, and the UPS module is connected with the AC load output end.

8. The mobile energy storage power distribution system of claim 7, wherein: The UPS module is also connected with a double-cut switch between the AC load output end, and the standby AC power supply is also connected to the double-cut switch.

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