An energy interaction system based on distributed mobile energy storage and its working method

Abstract

The present invention discloses an energy interaction system based on distributed mobile energy storage and a working method thereof, the system includes an AC power input unit, an energy distribution unit and a plurality of mobile energy storage units; the energy distribution unit performs two-way communication and power supply connection with each mobile energy storage unit, and when the energy distribution unit receives an interactive power supply request from one of the mobile energy storage units, it sends an interactive power supply control signal to the remaining mobile energy storage units in a time sequence; the mobile energy storage unit is used to supply power to the AC load, and when its power is lower than a preset value, it sends an interactive power supply request to the energy distribution unit, and after receiving the interactive power supply control signal, it enters an interactive power supply state to supply power to the energy distribution unit. The present invention can realize energy interaction between any mobile energy storage units, and then form a power supply network with independent mobile energy storage units to improve the reliability and stability of field power supply guarantee.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply and distribution, and in particular to an energy interaction system based on distributed mobile energy storage and a working method thereof. Background Art

[0002] A mobile energy storage unit is a portable device that can store electrical energy and is used to charge or provide power to mobile devices and other electronic products (such as flashlights, cordless phones, and laptops). It is particularly suitable for use in situations where there is no external power supply, and is particularly suitable for field work such as emergency rescue and disaster relief.

[0003] In actual use, in order to ensure sufficient electrical energy, it is often necessary to equip multiple mobile energy storage units. The mobile energy storage units in the prior art basically adopt an independent power supply method, that is, each mobile energy storage unit is powered separately. When the power of one of the mobile energy storage units is low, the mobile energy storage unit will not be able to continue to provide power for its AC load. Therefore, in simple distribution lines for field mobile power supply such as emergency rescue and disaster relief, the mobile energy storage unit can only be used as an independent power supply unit, and the advantages of flexible and efficient cluster distributed power supply cannot be brought into play. This limits its application in field emergency power supply and also reduces the reliability and stability of power supply. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide an energy interaction system based on distributed mobile energy storage and its working method that can realize energy interaction between any mobile energy storage units, and then form a power supply network with independent mobile energy storage units to improve the reliability and stability of field power supply security.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An energy interaction system based on distributed mobile energy storage, comprising an AC power input unit, an electric energy distribution unit and a plurality of mobile energy storage units;

[0007] The electric energy distribution unit is connected to each of the mobile energy storage units for bidirectional communication and power supply, and is used to distribute the electric energy of the AC power input unit to each of the mobile energy storage units. When the electric energy distribution unit receives an interactive power supply request from one of the mobile energy storage units, it sends an interactive power supply control signal to the remaining mobile energy storage units in a time sequence.

[0008] The mobile energy storage unit is used to supply power to the AC load, and when the power level of the mobile energy storage unit is lower than a preset value, the mobile energy storage unit sends an interactive power supply request to the power distribution unit, and after receiving the interactive power supply control signal of the power distribution unit, enters an interactive power supply state to supply power to the power distribution unit.

[0009] The working principle of the present invention is: when the energy interaction system of the present invention is in use, when the AC power input unit has AC power input to the power distribution unit, the power distribution unit distributes the AC power of the AC power input unit to each mobile energy storage unit, and the mobile energy storage unit enters an online working state and supplies power to the AC load; when the AC power input unit has no AC power input to the power distribution unit, the mobile energy storage unit enters a backup working state and supplies power to the AC load; when the mobile energy storage unit enters the backup working state to supply power to the AC load so that its power is lower than a preset value, the mobile energy storage unit sends an interactive power supply request to the power distribution unit; after receiving the interactive power supply request, the power distribution unit sends an interactive power supply control signal to the remaining mobile energy storage units in a time sequence, and when the mobile energy storage unit receives the interactive power supply control signal from the power distribution unit, it will enter an interactive power supply state, at which time the mobile energy storage unit supplies power to the AC load and outputs interactive power to the power distribution unit; then the mobile energy storage unit that sends the interactive power supply request accepts the interactive power supply input from the power distribution unit and supplies power to the AC load. This enables energy interaction between any mobile energy storage units, and independent mobile energy storage units form a power supply network to improve the reliability and stability of field power supply.

[0010] A working method of the energy interaction system based on distributed mobile energy storage as described above comprises the following steps:

[0011] Step 1) Whether the AC power input unit has AC power input to the power distribution unit, if yes, proceed to step 2), if not, proceed to step 3);

[0012] Step 2) The power distribution unit distributes the AC power of the AC power input unit to each of the mobile energy storage units, and the mobile energy storage units enter an online working state and supply power to the AC load, and then return to step 1)

[0013] Step 3) The mobile energy storage unit enters a backup working state and supplies power to the AC load;

[0014] Step 4) Whether the power of the mobile energy storage unit is lower than the preset value, if yes, execute step 5), if not, execute step 6);

[0015] Step 5) After the mobile energy storage unit sends an interactive power supply request to the power distribution unit, execute step 7);

[0016] Step 6) Whether the mobile energy storage unit receives the interactive power supply control signal from the power distribution unit, if yes, it enters the interactive power supply state, the mobile energy storage unit supplies power to the AC load, and at the same time outputs interactive power to the power distribution unit and then returns to step 1), if not, directly returns to step 1);

[0017] Step 7) The mobile energy storage unit receives the interactive power supply input from the power distribution unit and supplies power to the AC load, and then returns to step 1).

[0018] This solution also provides another energy interaction system based on distributed mobile energy storage, including a control bus, an AC power input unit, an energy distribution unit and a plurality of mobile energy storage units;

[0019] The electric energy distribution unit is bidirectionally connected to each of the mobile energy storage units for power supply, so as to distribute the electric energy of the AC power input unit to each of the mobile energy storage units;

[0020] The control bus is bidirectionally connected to the mobile energy storage units for sending interactive power supply control signals to the remaining mobile energy storage units in a time sequence upon receiving an interactive power supply request from one of the mobile energy storage units;

[0021] The mobile energy storage unit is used to supply power to the AC load, and when the power level of the mobile energy storage unit is lower than a preset value, the mobile energy storage unit sends an interactive power supply request to the control bus, and enters an interactive power supply state to supply power to the power distribution unit after receiving the interactive power supply control signal from the control bus.

[0022] The working principle of the present invention is: when the energy interaction system of the present invention is in use, when the AC power input unit has AC power input to the power distribution unit, the power distribution unit distributes the AC power of the AC power input unit to each mobile energy storage unit, and the mobile energy storage unit enters an online working state and supplies power to the AC load; when the AC power input unit has no AC power input to the power distribution unit, the mobile energy storage unit enters a backup working state and supplies power to the AC load; when the mobile energy storage unit enters the backup working state to supply power to the AC load so that its power is lower than a preset value, the mobile energy storage unit sends an interactive power supply request to the control bus; after receiving the interactive power supply request, the control bus sends an interactive power supply control signal to the remaining mobile energy storage units in a time sequence, and when the mobile energy storage unit receives the interactive power supply control signal from the control bus, it will enter an interactive power supply state, at which time the mobile energy storage unit supplies power to the AC load and outputs interactive power to the power distribution unit; then the mobile energy storage unit that sends the interactive power supply request accepts the interactive power supply input from the power distribution unit and supplies power to the AC load. This enables energy interaction between any mobile energy storage units, and independent mobile energy storage units form a power supply network to improve the reliability and stability of field power supply.

[0023] A working method of the energy interaction system based on distributed mobile energy storage as described above comprises the following steps:

[0024] Step 1) Whether the AC power input unit has AC power input to the power distribution unit, if yes, proceed to step 2), if not, proceed to step 3);

[0025] Step 2) The power distribution unit distributes the AC power of the AC power input unit to each of the mobile energy storage units, and the mobile energy storage units enter an online working state and supply power to the AC load, and then return to step 1)

[0026] Step 3) The mobile energy storage unit enters a backup working state and supplies power to the AC load;

[0027] Step 4) Whether the power of the mobile energy storage unit is lower than the preset value, if yes, execute step 5), if not, execute step 6);

[0028] Step 5) After the mobile energy storage unit sends an interactive power supply request to the control bus, execute step 7);

[0029] Step 6) Whether the mobile energy storage unit receives the control signal of interactive power supply from the control bus, if yes, it enters the interactive power supply state, the mobile energy storage unit supplies power to the AC load, and at the same time outputs interactive power to the power distribution unit and then returns to step 1), if no, directly returns to step 1);

[0030] Step 7) The mobile energy storage unit receives the interactive power supply input from the power distribution unit and supplies power to the AC load, and then returns to step 1).

[0031] Preferably, the mobile energy storage unit includes a rectifier and inverter module, a charging module, a battery pack, a display control module and a first switch component, the first switch component includes a switch K1, a switch K2, a switch K3 and a switch K4, a first input end of the rectifier and inverter module is connected to the power output end of the battery pack, a second input end of the rectifier and inverter module is simultaneously connected to one end of the switch K2 and the switch K3, the other end of the switch K2 is simultaneously connected to one end of the switch K1 and the power distribution unit, the other end of the switch K3 is connected to the input end of the charging module, the output end of the charging module is connected to the power input end of the battery pack, the other end of the switch K1 is simultaneously connected to the output end of the rectifier and inverter module and one end of the switch K4, the other end of the switch K4 is connected to an AC load, and the display control module is connected to the first switch component for controlling and displaying the working status of the mobile energy storage unit.

[0032] In this way, when the mobile energy storage unit is in an online working state, the switch K1 is disconnected, the switches K2, K3 and K4 are closed, and the AC power distributed to the mobile energy storage unit by the power distribution unit is supplied to the AC load through the switch K2, the rectifier inverter module and the switch K4, and the battery pack is charged through the switch K3 and the charging module;

[0033] When the mobile energy storage unit enters the backup working state, switches K1, K2 and K3 are disconnected, and switch K4 is closed. The battery pack discharges and then passes through the rectifier inverter module and switch K4 to supply power to the AC load.

[0034] When the mobile energy storage unit enters the interactive power supply state, switch K2 and switch K3 are disconnected, switch K1 and switch K4 are closed, and the battery pack discharges to supply power to the AC load through the rectifier inverter module and switch K4 on the one hand, and to supply power to the power distribution unit through the rectifier inverter module and switch K1 on the other hand.

[0035] Preferably, the energy interaction system also includes a generator set and a photovoltaic power generation unit, the first switch assembly also includes a switch K5, one end of the switch K5 is connected to the generator set, the other end of the switch K5 is connected between the second input end of the rectifier inverter module and the switch K3, and the photovoltaic power generation unit is connected to the power input end of the battery pack to charge the battery pack through the photovoltaic power generation unit.

[0036] In this way, when the mobile energy storage unit enters the backup working state or the interactive power supply state, the generator set is connected by disconnecting switch K2 and closing switches K1, K3, K4 and K5. The electric energy generated by the generator set charges the battery pack through switches K5, K3 and the charging module, and also supplies power to the AC load through switches K5, the rectifier inverter module and switch K4, and also supplies power to the power distribution unit through switches K5, the rectifier inverter module and switch K1. In this way, the power supply capacity of the generator set can be enhanced by connecting to it. At the same time, the photovoltaic power generation unit can also directly charge the battery pack to further improve the power supply capacity of the mobile energy storage unit.

[0037] Preferably, the AC power input unit includes a three-phase AC power component and a single-phase AC power component, and the power distribution unit includes a three-phase AC input control switch component, a single-phase AC input control switch component, a busbar control switch component, and a control display module; the three-phase AC input control switch component is used to connect to the three-phase AC power component, and the single-phase AC input control switch component is used to connect to the single-phase AC power component; the busbar control switch component is used to connect to the mobile energy storage unit, and the control display module is respectively connected to the three-phase AC input control switch component, the single-phase AC input control switch component and the busbar control switch component, and is used to control and display the working status of the power distribution unit.

[0038] In this way, when the three-phase AC power component has three-phase AC power input to the power distribution unit, the three-phase AC input control switch component is closed to input the three-phase AC power of the three-phase AC power component into the mobile energy storage unit through the power distribution unit; when the single-phase AC power component has single-phase AC power input to the power distribution unit, the single-phase AC input control switch component is closed to input the single-phase AC power of the single-phase AC power component into the mobile energy storage unit through the power distribution unit; when the mobile energy storage unit issues an interactive power supply request, the busbar control switch component is closed to realize interactive power supply between mobile energy storage units.

[0039] Preferably, in step 2), when the mobile energy storage unit enters the online working state, the AC power distributed to the mobile energy storage unit by the power distribution unit is used to supply power to the AC load after passing through the rectifier inverter module, and the battery pack is charged through the charging module;

[0040] In step 3), when the mobile energy storage unit enters the backup working state, the battery pack is discharged to the rectifier inverter module to supply power to the AC load;

[0041] In step 6), when the mobile energy storage unit enters the interactive power supply state, the battery pack discharges to the rectifier inverter module, and the rectifier module supplies power to the AC load and the power distribution unit at the same time.

[0042] Preferably, the first switch assembly includes a switch K1, a switch K2, a switch K3 and a switch K4;

[0043] In step 2), when the mobile energy storage unit enters the online working state, the switch K1 is disconnected, the switch K2, the switch K3 and the switch K4 are closed, and the AC power distributed to the mobile energy storage unit by the power distribution unit is supplied to the AC load through the switch K2, the rectifier inverter module and the switch K4, and the battery pack is charged through the switch K3 and the charging module;

[0044] In step 3), when the mobile energy storage unit enters the backup working state, the switch K1, the switch K2 and the switch K3 are disconnected, the switch K4 is closed, and the battery pack is discharged through the rectifier inverter module and the switch K4 to supply power to the AC load;

[0045] In step 6), when the mobile energy storage unit enters the interactive power supply state, the switch K2 and the switch K3 are disconnected, the switch K1 and the switch K4 are closed, the battery pack is discharged through the rectifier inverter module and the switch K4 to supply power to the AC load, and the battery pack is discharged through the rectifier inverter module and the switch K1 to supply power to the power distribution unit.

[0046] Preferably, when the mobile energy storage unit enters the backup working state or the interactive power supply state, the generator set is connected by disconnecting the switch K2, closing the switch K1, the switch K3, the switch K4 and the switch K5, and the electric energy generated by the generator set charges the battery pack through the switch K5, the switch K3 and the charging module, and supplies power to the AC load through the switch K5, the rectifier inverter module and the switch K4, and supplies power to the power distribution unit through the switch K5, the rectifier inverter module and the switch K1.

[0047] Compared with the prior art, the present invention has the following advantages:

[0048] 1. The mobile energy storage unit in the present invention realizes the backup power supply for AC loads and the interactive power supply within the system, and the power distribution unit distributes three-phase and single-phase AC input power and interactive power within the system. When there is three-phase or single-phase AC power input, the power distribution unit distributes the input power to each mobile energy storage unit, and each mobile energy storage unit is in an online working state, supplies power to the AC load and charges the battery pack; when there is no three-phase or single-phase AC power input, each mobile energy storage unit is in a backup working state, and supplies power to the AC load through the discharge of the battery pack; when the battery pack in a mobile energy storage unit is discharged to a capacity lower than a preset value, other mobile energy storage units are sequentially transferred to an interactive working state, and the power supply time of the mobile energy storage unit is extended by supplying power to the power distribution unit, and then the power distribution unit supplies power to the mobile energy storage unit; at the same time, the mobile energy storage unit also has the access function of the generator set and the photovoltaic power generation unit, so as to greatly improve the backup power supply capacity and interactive power supply capacity of the mobile energy storage unit.

[0049] 2. The present invention consists of a plurality of mobile energy storage units and an electric energy distribution unit. The electric energy distribution unit serves as a central hub to connect the mobile energy storage units, and each mobile energy storage unit is connected to a single unit or a single group of AC loads in an online manner. While realizing the output control of the AC load, the mobile energy storage unit also interacts with other mobile energy storage units to realize cluster distributed power supply in the simple distribution line of the field mobile power supply; at the same time, the mobile energy storage unit can be connected to the photovoltaic power generation unit and the generator set to enhance the power supply capacity; the electric energy distribution unit can be connected to the power supply vehicle, the mains and other three-phase or single-phase AC for centralized power supply.

[0050] 3. In order to solve the problem that existing mobile energy storage units cannot perform cluster distributed power supply in simple distribution lines for outdoor mobile power supply, the present invention embeds mobile energy storage units into simple distribution lines, so that they can serve as energy storage power supply units and distribution route control units, thereby realizing the effective application of mobile energy storage unit cluster distributed power supply in outdoor mobile emergency power supply.

[0051] 4. The present invention optimizes the configuration method of distributed power supply of mobile energy storage unit clusters, simplifies the power distribution route, expands the energy interface and power supply mode, making it easier to effectively apply in field mobile emergency power supply, so that the power supply for rescue and disaster relief tasks can be more effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a system block diagram of an energy interaction system based on distributed mobile energy storage according to Embodiment 1 of the present invention;

[0053] Figure 2 It is a schematic diagram of the composition of a mobile energy storage unit in the energy interaction system based on distributed mobile energy storage of the present invention;

[0054] Figure 3 It is a working schematic diagram of the mobile energy storage unit in the energy interaction system based on distributed mobile energy storage of the present invention when it is in an online working state;

[0055] Figure 4 It is a working schematic diagram of the mobile energy storage unit in the energy interaction system based on distributed mobile energy storage of the present invention when it is in a backup working state;

[0056] Figure 5 It is a working schematic diagram of the mobile energy storage unit in the energy interaction system based on distributed mobile energy storage of the present invention when it is in an interactive working state;

[0057] Figure 6 It is a working schematic diagram of the mobile energy storage unit in the energy interaction system based on distributed mobile energy storage of the present invention when the mobile energy storage unit adopts a generator set to supply power;

[0058] Figure 7 It is a schematic diagram of the composition of the electric energy distribution unit in the energy interaction system based on distributed mobile energy storage of the present invention;

[0059] Figure 8 It is a working schematic diagram of the energy distribution unit in the energy interaction system based on distributed mobile energy storage of the present invention when the power distribution unit is input with three-phase alternating current;

[0060] Fig. 9 It is a working schematic diagram of the energy distribution unit in the energy interaction system based on distributed mobile energy storage of the present invention when single-phase alternating current is input;

[0061] Fig.10 It is a schematic diagram of the operation of the electric energy distribution unit in the energy interactive system based on distributed mobile energy storage of the present invention when the electric energy distribution unit is interactively powered;

[0062] Fig.11 It is a flow chart of the working method of the energy interaction system based on distributed mobile energy storage of the present invention;

[0063] Fig.12 A control flow chart of a mobile energy storage unit in a working method of an energy interaction system based on distributed mobile energy storage according to the present invention;

[0064] Fig.13 This is a system block diagram of an energy interaction system based on distributed mobile energy storage according to Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0065] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0066] Embodiment 1:

[0067] As attached Figure 1 As shown, an energy interaction system based on distributed mobile energy storage includes an AC power input unit, an energy distribution unit and a plurality of mobile energy storage units;

[0068] The power distribution unit performs two-way communication and power supply connection with each mobile energy storage unit, and is used to distribute the power of the AC power input unit to each mobile energy storage unit. When the power distribution unit receives an interactive power supply request from one of the mobile energy storage units, it sends an interactive power supply control signal to the remaining mobile energy storage units in sequence. Specifically, the method of sending an interactive power supply control signal to the remaining mobile energy storage units in sequence is as follows: if the power of the 1# mobile energy storage unit is lower than a preset value and an interactive power supply request is issued, a control signal is first sent to the 2# mobile energy storage unit, and the 2# mobile energy storage unit enters the interactive power supply state. The interactive power supply state is in a certain period of time, such as 2s, and then a control signal is sent to the 3# mobile energy storage unit, and the 3# mobile energy storage unit enters the interactive power supply state for a certain period of time, such as 4s. Next, a control signal is sent to the 4# mobile energy storage unit, and the 4# mobile energy storage unit enters the interactive power supply state for a certain period of time, such as 6s. And so on. Each mobile storage unit enters the interactive power supply state in a certain order and works for a certain period of time. Thus, the interactive power supply control signal is sent to the remaining mobile energy storage units in sequence, so that each mobile storage unit enters the interactive power supply state in sequence.

[0069] The mobile energy storage unit is used to supply power to the AC load, and when the power level of the mobile energy storage unit is lower than a preset value, the mobile energy storage unit sends an interactive power supply request to the power distribution unit, and after receiving the interactive power supply control signal from the power distribution unit, enters an interactive power supply state to supply power to the power distribution unit.

[0070] The working principle of the present invention is: when the energy interaction system of the present invention is in use, when the AC power input unit has AC power input to the power distribution unit, the power distribution unit distributes the AC power of the AC power input unit to each mobile energy storage unit, and the mobile energy storage unit enters an online working state and supplies power to the AC load; when the AC power input unit has no AC power input to the power distribution unit, the mobile energy storage unit enters a backup working state and supplies power to the AC load; when the mobile energy storage unit enters the backup working state to supply power to the AC load so that its power is lower than a preset value, the mobile energy storage unit sends an interactive power supply request to the power distribution unit; after receiving the interactive power supply request, the power distribution unit sends an interactive power supply control signal to the remaining mobile energy storage units in a time sequence, and when the mobile energy storage unit receives the interactive power supply control signal from the power distribution unit, it will enter an interactive power supply state, at which time the mobile energy storage unit supplies power to the AC load and outputs interactive power to the power distribution unit; then the mobile energy storage unit that sends the interactive power supply request accepts the interactive power supply input from the power distribution unit and supplies power to the AC load. This enables energy interaction between any mobile energy storage units, and independent mobile energy storage units form a power supply network to improve the reliability and stability of field power supply.

[0071] As attached Figure 2 As shown, in this embodiment, the mobile energy storage unit includes a rectifier inverter module, a charging module, a battery pack, a display control module and a first switch component, the first switch component includes a switch K1, a switch K2, a switch K3 and a switch K4, a first input end of the rectifier inverter module is connected to the power output end of the battery pack, a second input end of the rectifier inverter module is simultaneously connected to one end of the switch K2 and the switch K3, the other end of the switch K2 is simultaneously connected to one end of the switch K1 and the power distribution unit, the other end of the switch K3 is connected to the input end of the charging module, the output end of the charging module is connected to the power input end of the battery pack, the other end of the switch K1 is simultaneously connected to the output end of the rectifier inverter module and one end of the switch K4, the other end of the switch K4 is connected to the AC load, and the display control module is connected to the first switch component for controlling and displaying the working state of the mobile energy storage unit.

[0072] In this way, when the mobile energy storage unit is in an online working state, the switch K1 is opened, and the switches K2, K3 and K4 are closed. The AC power distributed to the mobile energy storage unit by the power distribution unit is supplied to the AC load through the switch K2, the rectifier inverter module and the switch K4, and the battery pack is charged through the switch K3 and the charging module. Figure 3 As shown;

[0073] When the mobile energy storage unit enters the backup working state, switches K1, K2 and K3 are disconnected, and switch K4 is closed. The battery pack discharges and then passes through the rectifier inverter module and switch K4 to supply power to the AC load. Figure 4 As shown;

[0074] When the mobile energy storage unit enters the interactive power supply state, switches K2 and K3 are disconnected, switches K1 and K4 are closed, and the battery pack discharges to supply power to the AC load through the rectifier inverter module and switch K4, and to supply power to the power distribution unit through the rectifier inverter module and switch K1, as shown in the attached figure. Figure 5 shown.

[0075] As attached Figure 2 As shown, in this embodiment, the energy interaction system also includes a generator set and a photovoltaic power generation unit, and the first switch component also includes a switch K5, one end of the switch K5 is connected to the generator set, and the other end of the switch K5 is connected between the second input end of the rectifier inverter module and the switch K3, and the photovoltaic power generation unit is connected to the power input end of the battery pack to charge the battery pack through the photovoltaic power generation unit.

[0076] In this way, when the mobile energy storage unit enters the backup working state or the interactive power supply state, the generator set is connected by opening the switch K2 and closing the switches K1, K3, K4 and K5. The electric energy generated by the generator set charges the battery pack through the switches K5, K3 and the charging module, and supplies power to the AC load through the switches K5, the rectifier inverter module and the switch K4, and supplies power to the power distribution unit through the switches K5, the rectifier inverter module and the switch K1. Figure 6 As shown. Therefore, the power supply capacity can be enhanced by connecting to the generator set. At the same time, the photovoltaic power generation unit can also directly charge the battery pack to further improve the power supply capacity of the mobile energy storage unit.

[0077] As attached Figure 7 As shown, in this embodiment, the AC power input unit includes a three-phase AC power component and a single-phase AC power component, and the power distribution unit includes a three-phase AC input control switch component K6, a single-phase AC input control switch component K7, busbar control switch components K8 and K9, and a control display module; the three-phase AC input control switch component K6 is used to connect to the three-phase AC power component, and the single-phase AC input control switch component K7 is used to connect to the single-phase AC power component; the busbar control switch component (K8 and K9) is used to connect to the mobile energy storage unit, and the control display module is respectively connected to the three-phase AC input control switch component K6, the single-phase AC input control switch component K7 and the busbar control switch component (K8 and K9) for controlling and displaying the working status of the power distribution unit.

[0078] Thus, when the three-phase AC power component has three-phase AC power input to the power distribution unit, the three-phase AC input control switch component K6 is closed to input the three-phase AC power of the three-phase AC power component to the mobile energy storage unit through the power distribution unit, as shown in the attached Figure 8 When the single-phase AC power component has single-phase AC input to the power distribution unit, the single-phase AC input control switch component K7 is closed to input the single-phase AC power of the single-phase AC power component to the mobile energy storage unit through the power distribution unit, as shown in the attached Fig. 9 When the mobile energy storage unit issues an interactive power supply request, the busbar control switch assembly (K8 and K9) is closed to realize the interactive power supply between the mobile energy storage units, as shown in the attached figure. Fig.10 shown.

[0079] As attached Fig.11 As shown, a working method of an energy interaction system based on distributed mobile energy storage, using the above-mentioned energy interaction system based on distributed mobile energy storage, includes the following steps:

[0080] Step 1) Whether the AC power input unit has AC power input to the power distribution unit, if yes, execute step 2), if not, execute step 3);

[0081] Step 2) The power distribution unit distributes the AC power of the AC power input unit to each mobile energy storage unit. The mobile energy storage unit enters the online working state and supplies power to the AC load, and then returns to execute step 1)

[0082] Step 3) The mobile energy storage unit enters the backup working state and supplies power to the AC load;

[0083] Step 4) Whether the power of the mobile energy storage unit is lower than the preset value, if so, execute step 5); if not, execute step 6);

[0084] Step 5) After the mobile energy storage unit sends an interactive power supply request to the power distribution unit, execute step 7);

[0085] Step 6) Whether the mobile energy storage unit receives the interactive power supply control signal from the power distribution unit, if yes, it enters the interactive power supply state, the mobile energy storage unit supplies power to the AC load, and at the same time outputs interactive power to the power distribution unit and then returns to step 1), if not, directly returns to step 1);

[0086] Step 7) The mobile energy storage unit receives the interactive power supply input from the power distribution unit and supplies power to the AC load, and then returns to execute step 1).

[0087] As attached Fig.12As shown, in this embodiment, in step 2), when the mobile energy storage unit enters the online working state, the AC power distributed to the mobile energy storage unit by the power distribution unit is used to supply power to the AC load after passing through the rectifier inverter module, and the battery pack is charged through the charging module;

[0088] In step 3), when the mobile energy storage unit enters the backup working state, the battery pack is discharged to the rectifier inverter module to supply power to the AC load;

[0089] In step 6), when the mobile energy storage unit enters the interactive power supply state, the battery pack discharges to the rectifier inverter module, and the rectifier module supplies power to the AC load and the power distribution unit at the same time.

[0090] In this embodiment, in step 2), when the mobile energy storage unit enters the online working state, the switch K1 is opened, the switch K2, the switch K3 and the switch K4 are closed, and the AC power distributed to the mobile energy storage unit by the power distribution unit is supplied to the AC load through the switch K2, the rectifier inverter module and the switch K4, and the battery pack is charged through the switch K3 and the charging module, as shown in the attached figure. Figure 3 As shown;

[0091] In step 3), when the mobile energy storage unit enters the backup working state, switches K1, K2 and K3 are disconnected, and switch K4 is closed. The battery pack discharges and then passes through the rectifier inverter module and switch K4 to supply power to the AC load. Figure 4 As shown;

[0092] In step 6), when the mobile energy storage unit enters the interactive power supply state, switches K2 and K3 are disconnected, switches K1 and K4 are closed, the battery pack discharges through the rectifier inverter module and switch K4 to supply power to the AC load, and the battery pack discharges through the rectifier inverter module and switch K1 to supply power to the power distribution unit, as shown in the attached Figure 5 shown.

[0093] In this embodiment, when the mobile energy storage unit enters the backup working state or the interactive power supply state, the generator set is connected by opening the switch K2, closing the switch K1, the switch K3, the switch K4 and the switch K5, and the electric energy generated by the generator set is used to charge the battery pack through the switch K5, the switch K3 and the charging module, and to supply power to the AC load through the switch K5, the rectifier inverter module and the switch K4, and to supply power to the power distribution unit through the switch K5, the rectifier inverter module and the switch K1, as shown in the attached figure. Figure 6 shown.

[0094] Embodiment 2:

[0095] As attached Fig.13As shown, an energy interaction system based on distributed mobile energy storage includes a control bus, an AC power input unit, an energy distribution unit and a plurality of mobile energy storage units;

[0096] The power distribution unit is bidirectionally connected to each mobile energy storage unit for power supply, so as to distribute the power of the AC power input unit to each mobile energy storage unit;

[0097] The control bus is bidirectionally connected to the mobile energy storage unit for sending interactive power supply control signals to the remaining mobile energy storage units in a time sequence upon receiving an interactive power supply request from one of the mobile energy storage units;

[0098] The mobile energy storage unit is used to supply power to the AC load, and when the power level of the mobile energy storage unit is lower than a preset value, the mobile energy storage unit sends an interactive power supply request to the control bus, and enters an interactive power supply state to supply power to the power distribution unit after receiving the interactive power supply control signal from the control bus.

[0099] The working principle of the present invention is: when the energy interaction system of the present invention is in use, when the AC power input unit has AC power input to the power distribution unit, the power distribution unit distributes the AC power of the AC power input unit to each mobile energy storage unit, and the mobile energy storage unit enters an online working state and supplies power to the AC load; when the AC power input unit has no AC power input to the power distribution unit, the mobile energy storage unit enters a backup working state and supplies power to the AC load; when the mobile energy storage unit enters the backup working state to supply power to the AC load so that its power is lower than a preset value, the mobile energy storage unit sends an interactive power supply request to the control bus; after receiving the interactive power supply request, the control bus sends an interactive power supply control signal to the remaining mobile energy storage units in a time sequence, and when the mobile energy storage unit receives the interactive power supply control signal from the control bus, it will enter an interactive power supply state, at which time the mobile energy storage unit supplies power to the AC load and outputs interactive power to the power distribution unit; then the mobile energy storage unit that sends the interactive power supply request accepts the interactive power supply input from the power distribution unit and supplies power to the AC load. This enables energy interaction between any mobile energy storage units, and independent mobile energy storage units form a power supply network to improve the reliability and stability of field power supply.

[0100] As attached Fig.11 As shown, a working method of an energy interaction system based on distributed mobile energy storage, using the above-mentioned energy interaction system based on distributed mobile energy storage, includes the following steps:

[0101] Step 1) Whether the AC power input unit has AC power input to the power distribution unit, if yes, execute step 2), if not, execute step 3);

[0102] Step 2) The power distribution unit distributes the AC power of the AC power input unit to each mobile energy storage unit. The mobile energy storage unit enters the online working state and supplies power to the AC load, and then returns to execute step 1)

[0103] Step 3) The mobile energy storage unit enters the backup working state and supplies power to the AC load;

[0104] Step 4) Whether the power of the mobile energy storage unit is lower than the preset value, if so, execute step 5); if not, execute step 6);

[0105] Step 5) After the mobile energy storage unit sends an interactive power supply request to the control bus, execute step 7);

[0106] Step 6) Whether the mobile energy storage unit receives the control signal of interactive power supply from the control bus, if yes, it enters the interactive power supply state, the mobile energy storage unit supplies power to the AC load, and at the same time outputs interactive power to the power distribution unit and then returns to step 1), if not, directly returns to step 1);

[0107] Step 7) The mobile energy storage unit receives the interactive power supply input from the power distribution unit and supplies power to the AC load, and then returns to execute step 1).

[0108] Compared with the prior art, the mobile energy storage unit in the present invention realizes the backup power supply for AC loads and the interactive power supply within the system, and the power distribution unit distributes three-phase and single-phase AC input power and interactive power within the system. When there is three-phase or single-phase AC power input, the power distribution unit distributes the input power to each mobile energy storage unit, and each mobile energy storage unit is in an online working state, supplies power to the AC load and charges the battery pack; when there is no three-phase or single-phase AC power input, each mobile energy storage unit is in a backup working state, and supplies power to the AC load through the discharge of the battery pack; when the battery pack in a mobile energy storage unit is discharged to a capacity lower than a preset value, other mobile energy storage units are sequentially transferred to an interactive working state in a time sequence, and the power supply time of the mobile energy storage unit is extended by supplying power to the power distribution unit, and then the power distribution unit supplies power to the mobile energy storage unit; at the same time, the mobile energy storage unit also has the access function of the generator set and the photovoltaic power generation unit, so as to greatly improve the backup power supply capacity and interactive power supply capacity of the mobile energy storage unit. The present invention is composed of a plurality of mobile energy storage units and an electric energy distribution unit. The electric energy distribution unit serves as a central hub to connect the mobile energy storage units, and each mobile energy storage unit is connected to a single unit or a single group of AC loads in an online manner. While realizing the output control of the AC load, the mobile energy storage unit also exchanges energy with other mobile energy storage units, thereby realizing cluster distributed power supply in the simple distribution line of field mobile power supply; at the same time, the mobile energy storage unit can be connected to the photovoltaic power generation unit and the generator set to improve the power supply capacity; the electric energy distribution unit can be connected to the power supply vehicle, the mains and other three-phase or single-phase AC for centralized power supply. In view of the problem that the existing mobile energy storage units cannot perform cluster distributed power supply in the simple distribution line of field mobile power supply, the present invention embeds the mobile energy storage unit into the simple distribution line, so that it serves as an energy storage power supply unit and a distribution route control unit, thereby realizing the effective application of cluster distributed power supply of mobile energy storage units in field mobile emergency power supply. The present invention optimizes the configuration method of distributed power supply of mobile energy storage unit clusters, simplifies the power distribution route, expands the energy interface and power supply mode, makes it easier to be effectively used in field mobile emergency power supply, and makes the power supply for rescue and disaster relief tasks more effectively guaranteed.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A working method of an energy interaction system based on distributed mobile energy storage, characterized in that: An energy interaction system based on distributed mobile energy storage is adopted, including an AC power input unit, an energy distribution unit and a plurality of mobile energy storage units; The electric energy distribution unit is connected to each of the mobile energy storage units for bidirectional communication and power supply, and is used to distribute the electric energy of the AC power input unit to each of the mobile energy storage units. When the electric energy distribution unit receives an interactive power supply request from one of the mobile energy storage units, it sends an interactive power supply control signal to the remaining mobile energy storage units in a time sequence. The mobile energy storage unit is used to supply power to the AC load, and when the power of the mobile energy storage unit is lower than a preset value, the mobile energy storage unit sends an interactive power supply request to the power distribution unit, and enters an interactive power supply state to supply power to the power distribution unit after receiving a control signal of interactive power supply from the power distribution unit; The following steps are involved: Step 1) Whether the AC power input unit has AC power input to the power distribution unit, if yes, proceed to step 2), if not, proceed to step 3); Step 2) the power distribution unit distributes the AC power of the AC power input unit to each of the mobile energy storage units, the mobile energy storage units enter an online working state and supply power to the AC load, and then return to step 1); Step 3) The mobile energy storage unit enters a backup working state and supplies power to the AC load; Step 4) Whether the power of the mobile energy storage unit is lower than the preset value, if yes, execute step 5), if not, execute step 6); Step 5) After the mobile energy storage unit sends an interactive power supply request to the power distribution unit, execute step 7); Step 6) Whether the mobile energy storage unit receives the interactive power supply control signal from the power distribution unit, if yes, it enters the interactive power supply state, the mobile energy storage unit supplies power to the AC load, and at the same time outputs interactive power to the power distribution unit and then returns to step 1), if not, directly returns to step 1); Step 7) The mobile energy storage unit receives the interactive power supply input from the power distribution unit and supplies power to the AC load, and then returns to step 1).

2. A working method of an energy interaction system based on distributed mobile energy storage, characterized in that: An energy interaction system based on distributed mobile energy storage is adopted, including a control bus, an AC power input unit, an energy distribution unit and a plurality of mobile energy storage units; The electric energy distribution unit is bidirectionally connected to each of the mobile energy storage units for power supply, so as to distribute the electric energy of the AC power input unit to each of the mobile energy storage units; The control bus is bidirectionally connected to the mobile energy storage units for sending interactive power supply control signals to the remaining mobile energy storage units in a time sequence upon receiving an interactive power supply request from one of the mobile energy storage units; The mobile energy storage unit is used to supply power to the AC load, and when the power level of the mobile energy storage unit is lower than a preset value, the mobile energy storage unit sends an interactive power supply request to the control bus, and enters an interactive power supply state to supply power to the power distribution unit after receiving an interactive power supply control signal from the control bus; The following steps are involved: Step 1) Whether the AC power input unit has AC power input to the power distribution unit, if yes, proceed to step 2), if not, proceed to step 3); Step 2) the power distribution unit distributes the AC power of the AC power input unit to each of the mobile energy storage units, the mobile energy storage units enter an online working state and supply power to the AC load, and then return to step 1); Step 3) The mobile energy storage unit enters a backup working state and supplies power to the AC load; Step 4) Whether the power of the mobile energy storage unit is lower than the preset value, if yes, execute step 5), if not, execute step 6); Step 5) After the mobile energy storage unit sends an interactive power supply request to the control bus, execute step 7); Step 6) Whether the mobile energy storage unit receives the control signal of interactive power supply from the control bus, if yes, it enters the interactive power supply state, the mobile energy storage unit supplies power to the AC load, and at the same time outputs interactive power to the power distribution unit and then returns to step 1), if no, it directly returns to step 1); Step 7) The mobile energy storage unit receives the interactive power supply input from the power distribution unit and supplies power to the AC load, and then returns to step 1).

3. The working method of the energy interaction system based on distributed mobile energy storage according to claim 1 or 2, characterized in that: The mobile energy storage unit includes a rectifier and inverter module, a charging module, a battery pack, a display control module and a first switch component. The first switch component includes a switch K1, a switch K2, a switch K3 and a switch K4. The first input end of the rectifier and inverter module is connected to the power output end of the battery pack. The second input end of the rectifier and inverter module is simultaneously connected to the switch K2 and one end of the switch K3. The other end of the switch K2 is simultaneously connected to one end of the switch K1 and the power distribution unit. The other end of the switch K3 is connected to the input end of the charging module. The output end of the charging module is connected to the power input end of the battery pack. The other end of the switch K1 is simultaneously connected to the output end of the rectifier and inverter module and one end of the switch K4. The other end of the switch K4 is connected to an AC load. The display control module is connected to the first switch component for controlling and displaying the working state of the mobile energy storage unit.

4. The working method of the energy interaction system based on distributed mobile energy storage according to claim 3 is characterized in that: The energy interaction system also includes a generator set and a photovoltaic power generation unit. The first switch component also includes a switch K5. One end of the switch K5 is connected to the generator set, and the other end of the switch K5 is connected between the second input end of the rectifier inverter module and the switch K3. The photovoltaic power generation unit is connected to the power input end of the battery pack to charge the battery pack through the photovoltaic power generation unit.

5. The working method of the energy interaction system based on distributed mobile energy storage according to claim 4 is characterized in that: The AC power input unit includes a three-phase AC power component and a single-phase AC power component, and the power distribution unit includes a three-phase AC input control switch component, a single-phase AC input control switch component, a busbar control switch component, and a control display module; the three-phase AC input control switch component is used to connect with the three-phase AC power component, and the single-phase AC input control switch component is used to connect with the single-phase AC power component; the busbar control switch component is used to connect with the mobile energy storage unit, and the control display module is respectively connected to the three-phase AC input control switch component, the single-phase AC input control switch component and the busbar control switch component, and is used to control and display the working status of the power distribution unit.

6. The working method of the energy interaction system based on distributed mobile energy storage according to claim 1 or 2, characterized in that: The mobile energy storage unit includes a rectifier inverter module, a charging module, a battery pack, a display control module and a first switch component; In step 2), when the mobile energy storage unit enters the online working state, the AC power distributed to the mobile energy storage unit by the power distribution unit is used to supply power to the AC load through the rectifier inverter module, and the battery pack is charged through the charging module; In step 3), when the mobile energy storage unit enters the backup working state, the battery pack discharges to the rectifier inverter module to supply power to the AC load; In step 6), when the mobile energy storage unit enters the interactive power supply state, the battery pack discharges to the rectifier-inverter module, and the rectifier-inverter module supplies power to the AC load and the power distribution unit at the same time.

7. The working method of the energy interaction system based on distributed mobile energy storage according to claim 6 is characterized in that: The first switch assembly includes a switch K1, a switch K2, a switch K3 and a switch K4; In step 2), when the mobile energy storage unit enters the online working state, the switch K1 is disconnected, the switch K2, the switch K3 and the switch K4 are closed, and the AC power distributed to the mobile energy storage unit by the power distribution unit is supplied to the AC load through the switch K2, the rectifier inverter module and the switch K4, and the AC power distributed to the mobile energy storage unit by the power distribution unit is charged to the battery pack through the switch K3 and the charging module; In step 3), when the mobile energy storage unit enters the backup working state, the switch K1, the switch K2 and the switch K3 are disconnected, the switch K4 is closed, and the battery pack is discharged through the rectifier inverter module and the switch K4 to supply power to the AC load; In step 6), when the mobile energy storage unit enters the interactive power supply state, the switch K2 and the switch K3 are disconnected, the switch K1 and the switch K4 are closed, the battery pack is discharged through the rectifier inverter module and the switch K4 to supply power to the AC load, and the battery pack is discharged through the rectifier inverter module and the switch K1 to supply power to the power distribution unit.

8. The working method of the energy interaction system based on distributed mobile energy storage according to claim 7 is characterized in that: The energy interaction system further includes a generator set, and the first switch assembly further includes a switch K5, one end of the switch K5 is connected to the generator set, and the other end of the switch K5 is connected between the second input end of the rectifier inverter module and the switch K3; When the mobile energy storage unit enters the backup working state or the interactive power supply state, the generator set is connected by disconnecting the switch K2, closing the switch K1, the switch K3, the switch K4 and the switch K5, and the electric energy generated by the generator set charges the battery pack after passing through the switch K5, the switch K3 and the charging module, and the electric energy generated by the generator set powers the AC load after passing through the switch K5, the rectifier inverter module and the switch K4, and the electric energy generated by the generator set powers the power distribution unit after passing through the switch K5, the rectifier inverter module and the switch K1.

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