Control method and device of mobile energy storage power van, electronic equipment and storage medium

Abstract

The invention provides a control method and device of a mobile energy storage power van, electronic equipment and a storage medium, and relates to the technical field of mobile energy storage. The mobile energy storage power van comprises a plurality of battery cluster main loops, a plurality of battery cluster auxiliary loops and a battery management system. The method comprises the following steps: controlling a battery management system to detect the turn-off state of a circuit breaker of each battery cluster main loop, detect the on-off state of each electric operator and detect the current state of each battery cluster main loop; and the battery management system is switched to centralized energy storage by controlling the circuit breakers and the electric operators based on the turn-off states of the circuit breakers, the on-off states of the electric operators and the current states of the main loops of the battery clusters. The mobile energy storage power van not only can realize centralized energy storage, but also can realize distributed energy storage, the energy storage mode is more flexible, the mobile energy storage power van can be suitable for more electric power scenes, the switching to the centralized energy storage can be realized only by controlling the circuit breaker and the electric operator, and the switching is simple and easy to realize.

Description

Technical Field

[0001] The present invention relates to the field of mobile energy storage technology, and in particular to a control method and device, electronic equipment, and storage medium for a mobile energy storage power supply vehicle. Background Art

[0002] Mobile energy storage power supply vehicle is a mobile power supply device that integrates energy storage, inverter, charging and other functions. As an efficient, convenient and reliable mobile power supply device, mobile energy storage power supply vehicle has broad application prospects in the fields of power, engineering rescue, medical rescue, field exploration operations, oil and gas extraction and construction.

[0003] Current mobile energy storage power supply vehicles usually adopt centralized energy storage solutions. However, centralized energy storage solutions are relatively rigid and difficult to adapt to increasingly complex power scenarios. Summary of the invention

[0004] The present invention provides a control method and device, electronic equipment, and storage medium for a mobile energy storage power supply vehicle, aiming to solve the problem that the control method of the existing mobile energy storage power supply vehicle is relatively rigid and difficult to apply to increasingly complex power scenarios.

[0005] According to a first aspect of the present invention, a control method for a mobile energy storage power supply vehicle is provided, wherein the mobile energy storage power supply vehicle comprises: a plurality of battery cluster main circuits, a plurality of battery cluster secondary circuits and a battery management system; one of the battery cluster main circuits corresponds to one of the battery cluster secondary circuits, and one of the battery cluster main circuits and a corresponding battery cluster secondary circuit share a battery cluster, the battery cluster main circuit further comprises: an energy storage inverter and a circuit breaker connected in sequence to the battery clusters; the battery cluster secondary circuit corresponding to the battery cluster main circuit further comprises: an electric controller connected in sequence to the battery clusters; the energy storage inverter and the circuit breaker connected in sequence in the battery cluster main circuit are connected in parallel with the electric controller in the battery cluster secondary circuit corresponding to the battery cluster main circuit; the energy storage inverter is also connected to a load; the battery management system is connected to the circuit breaker and the electric controller; the control method comprises:

[0006] Controlling the battery management system to detect the off state of the circuit breaker of each of the battery cluster main circuits, the on / off state of each of the electric controls, and the current state of each of the battery cluster main circuits;

[0007] The battery management system switches to centralized energy storage by controlling the circuit breakers and the electric operators based on the off state of each circuit breaker, the on / off state of each electric operator, and the current state of each main circuit of the battery cluster.

[0008] In the present invention, through the cooperation of multiple battery cluster main circuits, multiple battery cluster sub-circuits and a battery management system, it is possible to switch to centralized energy storage only by controlling the circuit breaker and the electric operation. That is to say, the mobile energy storage power supply vehicle can realize not only centralized energy storage but also distributed energy storage. The energy storage method is more flexible, different power outputs can be controlled, and more power scenarios can be applied. Moreover, switching to centralized energy storage can be achieved only by controlling the circuit breaker and the electric operation. The switching between centralized energy storage and distributed energy storage is simple and easy to achieve.

[0009] Optionally, the mobile energy storage power supply vehicle further includes: a DC converter and a charging gun; the battery cluster secondary circuit is connected to the DC converter and the charging gun in sequence; the battery management system switches to centralized energy storage by controlling the circuit breakers and the electric operators based on the off state of each of the circuit breakers, the on and off state of each of the electric operators, and the current state of each of the main circuits of the battery clusters, including:

[0010] When the electric vehicle needs to be charged, the battery management system controls only one circuit breaker to be in the closed state based on the off state of each circuit breaker, the on and off state of each electrical operator, and the current state of each battery cluster main circuit, controls the opening and closing of all other circuit breakers, and controls all electrical operators to close, so as to switch to centralized energy storage.

[0011] Optionally, the battery management system is further used to obtain the inter-cluster voltage difference of all the battery clusters; the inter-cluster voltage difference of all the battery clusters is the difference between the maximum value and the minimum value of each cluster voltage of all the battery clusters; the method further includes:

[0012] When the inter-cluster voltage difference is less than or equal to a preset voltage difference, the battery management system controls the battery cluster to charge the electric vehicle through the charging gun.

[0013] Optionally, the off state of each of the circuit breakers, the on / off state of each of the electric controls, and the current state of each of the main circuits of the battery clusters include:

[0014] Among the off states of the circuit breakers, at least two of the circuit breakers are in the closed state, at least one of the switch states of the electric controller is in the open state, and the current state of the main circuits of the battery clusters is no current; or,

[0015] The off states of the circuit breakers are all in the open state, the on / off state of at least one of the electric controls is in the open state, and the current state of the main circuits of the battery clusters is no current; or,

[0016] Among the off-states of the circuit breakers, at least two of the circuit breakers are in the closed state, at least one of the switch states of the electric operator is in the open state, and the current state of the main circuit of at least one battery cluster is current. The battery management system is also used to send a charge and discharge prohibition instruction to all energy storage inverters corresponding to all battery clusters with current, so that all energy storage inverters corresponding to all battery clusters with current are shut down.

[0017] Optionally, the method further includes:

[0018] After the electric vehicle is fully charged, the battery management system sends a charging prohibition instruction to the charging gun, so that the charging gun stops discharging;

[0019] When the circuit where the electric controller is located is without current for a period of time greater than or equal to a preset period of time, the battery management system controls each of the electric controllers to open, and controls the off state of at least two of the circuit breakers to the closed state, so as to switch from centralized energy storage to distributed energy storage.

[0020] Optionally, the battery management system includes: a slave control, a master control and a display control; the master control is connected to the circuit breaker, and the display control is connected to the electric operator; the battery cluster includes: a number of batteries, the slave control is used to obtain the voltage of each of the batteries, and the temperature of at least some of the batteries, the master control is used to control the circuit breaker to perform closing and opening operations, and the display control is used to control the electric operator to perform closing and opening operations.

[0021] Optionally, the mobile energy storage power supply vehicle further includes: a PCS coordination controller and an energy management system, an optical fiber is provided between the PCS coordination controllers of the two mobile energy storage power supply vehicles, and the method further includes:

[0022] The energy management system controls the two mobile energy storage power supply vehicles to work in coordination based on the optical fiber.

[0023] Optionally, a dual power conversion switch is provided between the energy storage converter and the power grid; the method further comprises:

[0024] In the grid-connected mode, the battery management system controls the dual power conversion switch to close, so that the battery clusters of the two mobile energy storage power supply vehicles and the power grid jointly supply power to the load; or,

[0025] In the off-grid mode, the battery management system controls the dual power conversion switch to open, so that the battery clusters of the two mobile energy storage power supply vehicles supply power to the load.

[0026] According to a second aspect of the present invention, a control device for a mobile energy storage power supply vehicle is provided, wherein the mobile energy storage power supply vehicle comprises: a plurality of battery cluster main circuits, a plurality of battery cluster secondary circuits and a battery management system; one of the battery cluster main circuits corresponds to one of the battery cluster secondary circuits, and one of the battery cluster main circuits and a corresponding battery cluster secondary circuit share a battery cluster, wherein the battery cluster main circuit further comprises: an energy storage inverter and a circuit breaker connected in sequence to the battery cluster; the battery cluster secondary circuit corresponding to the battery cluster main circuit further comprises: an electric controller connected in sequence to the battery cluster; the energy storage inverter and the circuit breaker connected in sequence in the battery cluster main circuit are connected in parallel with the electric controller in the battery cluster secondary circuit corresponding to the battery cluster main circuit; the energy storage inverter is also connected to a load; the battery management system is connected to the circuit breaker and the electric controller; the control device comprises:

[0027] A control module, used to control the battery management system to detect the off state of the circuit breaker of each of the battery cluster main circuits, detect the on and off state of each of the electric controls, and detect the current state of each of the battery cluster main circuits;

[0028] The switching module is used for the battery management system to switch to centralized energy storage by controlling the circuit breakers and the electric operators based on the off state of each circuit breaker, the on / off state of each electric operator, and the current state of each battery cluster main circuit.

[0029] According to a third aspect of the present invention, there is provided an electronic device, comprising:

[0030] A processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a control method for a mobile energy storage power supply vehicle as described above is implemented.

[0031] A fourth aspect of the present invention provides a readable storage medium, which, when instructions in the storage medium are executed by a processor of an electronic device, enables the electronic device to execute any of the aforementioned control methods for a mobile energy storage power supply vehicle.

[0032] A fifth aspect of the present invention provides a computer program product, comprising a computer program, which, when executed by a processor, implements any of the aforementioned control methods for a mobile energy storage power supply vehicle.

[0033] The control method, device, electronic device, readable storage medium and computer program product of the mobile energy storage power supply vehicle mentioned above have the same or similar beneficial effects, and will not be described again here to avoid repetition. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0035] Figure 1 A local topological diagram of a mobile energy storage power supply vehicle in an embodiment of the present invention is shown;

[0036] Figure 2 A partial wiring diagram of a mobile energy storage power supply vehicle in an embodiment of the present invention is shown;

[0037] Figure 3 A flow chart showing the steps of a control method for a first mobile energy storage power supply vehicle in an embodiment of the present invention is shown;

[0038] Figure 4 A flow chart showing the steps of a second control method for a mobile energy storage power supply vehicle in an embodiment of the present invention is shown;

[0039] Figure 5 A local power consumption topology diagram of a mobile energy storage power supply vehicle in an embodiment of the present invention is shown;

[0040] Figure 6 A schematic diagram of the system operation of two mobile energy storage power supply vehicles in an embodiment of the present invention is shown;

[0041] Figure 7 A schematic diagram of a control device for a mobile energy storage power supply vehicle in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] The present invention provides a control method for a mobile energy storage power supply vehicle, which may include: multiple battery cluster main circuits, multiple battery cluster secondary circuits and a battery management system (BMS). The number of battery cluster main circuits included in the mobile energy storage power supply vehicle is not specifically limited here, and the number of battery cluster main circuits included in the mobile energy storage power supply vehicle is equal to the number of battery cluster secondary circuits included in the mobile energy storage power supply vehicle. A battery cluster main circuit corresponds to a battery cluster secondary circuit, and a battery cluster main circuit and a corresponding battery cluster secondary circuit share a battery cluster, and the battery cluster main circuit also includes: a storage converter (PCS) and a circuit breaker connected to the battery cluster in sequence. The circuit breaker is an important protective device in the power system, which has the ability to close and disconnect the current under normal circuit conditions, and to carry, close and disconnect the current under abnormal circuit conditions (such as short circuit) within a specified time. The battery cluster sub-circuit corresponding to the battery cluster main circuit also includes: an electric controller connected in sequence to the battery cluster, a power storage converter (PCS) and a circuit breaker connected in sequence in the battery cluster main circuit and an electric controller in the battery cluster sub-circuit corresponding to the battery cluster main circuit connected in parallel. The electric controller here is the abbreviation of an electric operating mechanism, and its main function is to achieve opening and closing operations through electric energy control. The energy storage converter (PCS) is also connected to the load. The battery management system (BMS) is connected to the circuit breaker and the electric controller. As shown in reference Figure 1 , Figure 1 The Cluster in the figure is the battery cluster, and HVB is the high voltage box. Figure 1 The DC / AC in the circuit is the energy storage converter (PCS), the switch next to the energy storage converter (PCS) is the circuit breaker, and the switch connected in parallel with the energy storage converter (PCS) and the circuit breaker connected in sequence is the electric control. Figure 1 The mobile energy storage power supply vehicle shown in has a total of 8 battery clusters, that is, 8 battery cluster main circuits and 8 battery cluster auxiliary circuits. It should be noted that the main and auxiliary here are only used to distinguish different battery cluster circuits, and there is no representation of which is more important. For example, Figure 1 In the example, battery cluster 1, voltage box 1, the first energy storage converter (PCS) from top to bottom, and the first circuit breaker from top to bottom are connected in sequence to form a partial circuit of the main circuit of the battery cluster. Figure 1 In the figure, the battery cluster main circuit where battery cluster 1, voltage box 1, the first energy storage converter (PCS) from top to bottom, and the first circuit breaker from top to bottom are connected in sequence, and the corresponding battery cluster secondary circuit is: battery cluster 1, voltage box 1, the first electric operator from top to bottom are connected in sequence, and the two share the first row of battery cluster 1. The first energy storage converter (PCS) from top to bottom and the first circuit breaker from top to bottom are connected in sequence and connected in parallel with the first electric operator from top to bottom.

[0044] like Figure 2 In the figure, SG is a high voltage box. Figure 2 The split in Figure 1 The central energy storage converter (PCS) and circuit breaker are connected in sequence, corresponding to the position point of the electric control in parallel, and then continuing upwards is the distributed energy storage, and to the right is the centralized energy storage.

[0045] Reference Figure 3 , the control method of the mobile energy storage power supply vehicle may include the following steps.

[0046] Step 101 , controlling the battery management system to detect the off state of the circuit breaker of each of the battery cluster main circuits, the on / off state of each of the electric switches, and the current state of each of the battery cluster main circuits.

[0047] The battery management system (BMS) is connected to the circuit breaker and the electric operator. The BMS can detect the off state of the circuit breaker of each battery cluster main circuit, and can also detect the on and off state of each electric operator. The off state of the circuit breaker of the battery cluster main circuit includes: closed state or open state. If the off state of the circuit breaker is open state, the main circuit of the battery cluster where it is located is open. The on and off state of the electric operator can be divided into closed state or open state. If the on and off state of the electric operator is open state, the secondary circuit of the battery cluster where it is located is open.

[0048] The current state of the battery cluster main circuit includes: a current state and a no-current state. The battery cluster main circuit has current, indicating that the battery cluster main circuit is being charged and discharged. The battery cluster main circuit has no current, indicating that the battery cluster main circuit is not currently being charged and discharged.

[0049] Step 102: The battery management system switches to centralized energy storage by controlling the circuit breakers and the electric operators based on the off state of each circuit breaker, the on / off state of each electric operator, and the current state of each main circuit of the battery cluster.

[0050] Distributed energy storage here means: at least two battery clusters are charged and discharged at the same time, for example, at least two battery clusters are discharged at the same time. Centralized energy storage here means: all battery clusters are charged and discharged at the same time, for example, all battery clusters are discharged at the same time.

[0051] In the present application, the battery management system (BMS) controls at least two circuit breakers to be in a closed state, and all electric operators are in a divided state, which is distributed energy storage. The battery management system (BMS) controls all electric operators to be in a closed state, which is centralized energy storage. That is to say, the present application can realize the switching between centralized energy storage and distributed energy storage only by controlling the circuit breaker and the electric operator, that is to say, the mobile energy storage power supply vehicle can realize not only centralized energy storage but also distributed energy storage, and the energy storage method is more flexible, and different power outputs can be controlled, and it can be applied to more power scenarios, and the switching between centralized energy storage and distributed energy storage can be realized only by controlling the circuit breaker and the electric operator, and the switching between centralized energy storage and distributed energy storage is simple and easy to realize.

[0052] It should be noted that the present application can switch between centralized energy storage and distributed energy storage according to different application scenarios or power scenarios. For example, the distributed solution can be used in grid-connected, off-grid, and on-grid and off-grid working conditions. For example, when the mobile energy storage power supply vehicle is used for non-stop operation, emergency and disaster relief power supply, and major event power supply, the battery in the mobile energy storage power supply vehicle can power the load. At this time, the energy storage method can be distributed energy storage.

[0053] It should be noted that the grid-connected mentioned in this application means that the mobile energy storage power supply vehicle is connected to the power grid, and the mobile energy storage power supply vehicle and the power grid jointly supply power to the load. The off-grid mentioned in this application means that the mobile energy storage power supply vehicle is disconnected from the power grid, and the mobile energy storage power supply vehicle is in an independent operating state. The grid-connected and off-grid mentioned in this application is a combination of the two modes of grid-connected and off-grid. The grid-connected and off-grid mentioned in this application can be flexibly switched between grid-connected and off-grid to meet different power needs. When the power grid is stable and reliable, the mobile energy storage power supply vehicle can choose to connect to the grid and transmit excess electric energy to the power grid, or use the electricity of the power grid. When the power grid fails or there is a power outage, the mobile energy storage power supply vehicle can quickly switch to the off-grid mode and rely on itself to maintain power supply.

[0054] The present application also provides another control method for a mobile energy storage power supply vehicle, which is also applicable to the aforementioned mobile energy storage power supply vehicle. For the mobile energy storage power supply vehicle, reference can be made to the aforementioned related records. In order to avoid repetition, it will not be described here. Figure 4 , the control method of the mobile energy storage power supply vehicle may include the following steps.

[0055] Step 201 , controlling the battery management system to detect the off state of the circuit breaker of each of the battery cluster main circuits, the on / off state of each of the electric switches, and the current state of each of the battery cluster main circuits.

[0056] Step 201 may refer to step 101, and will not be described again here to avoid repetition.

[0057] Step 202, the mobile energy storage power supply vehicle also includes: a DC converter and a charging gun; the battery cluster secondary circuit is connected to the DC converter and the charging gun in sequence; when the electric vehicle needs to be charged, the battery management system controls only one circuit breaker to be in a closed state based on the off state of each circuit breaker, the on and off state of each electrical operator, and the current state of each battery cluster main circuit, controls the opening and closing of all other circuit breakers, and controls all electrical operators to close, so as to switch to centralized energy storage.

[0058] Reference Figure 1 , Figure 2 The mobile energy storage power supply vehicle can also include: a DC converter (DC / DC) and a charging gun on the basis of the above. The DC converter here is to adjust the output parameters of each battery cluster sub-circuit such as current and voltage to be suitable for the charging parameters of the charging gun. Figure 1 The mobile energy storage power supply vehicle shown in the figure shows two charging guns, namely P1 and P2. The power of the charging guns is not specifically limited here. For example, the charging power of the two charging guns is 120KW, and the total charging power of the two charging guns is 240KW. The charging gun is a facility in the mobile energy storage power supply vehicle that can be used to charge electric vehicles. It mainly undertakes the function of power transmission during charging. Figure 1 The battery cluster sub-circuit is connected to the aforementioned DC converter and charging gun in sequence. Here, all battery cluster sub-circuits are connected to the aforementioned DC converter and charging gun in sequence. In centralized energy storage, the battery cluster is directly connected to the DC converter and charging gun in sequence. There are fewer modules between the battery cluster and the charging gun, which can improve the energy conversion efficiency.

[0059] Only when the electric vehicle needs to be charged, the battery management system (BMS) will switch from distributed energy storage to centralized energy storage by controlling the circuit breakers and electrical operators based on the off state of each circuit breaker, the on and off state of each electrical operator, and the current state of the main circuit of each battery cluster. In other words, centralized energy storage is only applicable when the electric vehicle needs to be charged, and the electric vehicle can be fully charged quickly. In other scenarios, the appropriate number of battery clusters can be selected for charging and discharging according to the actual load power consumption requirements. For example, centralized energy storage can be used to charge electric vehicles in high-speed service areas.

[0060] This step is to control only one circuit breaker to be closed, control the opening of all other circuit breakers, and control all electrical operators to close the circuits, which means that only one battery cluster main circuit is open, the other battery cluster main circuits are disconnected, and all battery cluster secondary circuits are open. Here, only one battery cluster main circuit is open, and the battery cluster can supply power to some AC loads in the mobile energy storage power supply vehicle, and all battery cluster secondary circuits are open. Figure 5Some AC loads in the mobile energy storage power supply vehicle may refer to liquid coolers, etc., some loads in the mobile energy storage power supply vehicle that require AC power supply, that is, only one battery cluster main circuit here is to supply power to the liquid coolers, etc., some loads in the mobile energy storage power supply vehicle that require AC power supply. For example, the consumption of the loads such as the liquid coolers in the mobile energy storage power supply vehicle that require AC power supply is about 20KW (corresponding to Figure 1 AC Power 20KW) can be powered by a battery cluster main circuit. Figure 1 The mains electricity here refers to the power grid.

[0061] It should be noted that which circuit breaker is selected to be in the closed state among the multiple circuit breakers can be determined according to the conditions of the battery clusters in the main circuit of the battery cluster where each circuit breaker is located, and no specific limitation is made to this.

[0062] It should be noted that the electric control in the present application is mainly used to make each battery cluster sub-circuit a passage. Therefore, the electric control can adopt a single control type, that is, one electric control controls the on and off of multiple battery cluster sub-circuits. For example, one electric control controls the on and off of 4 battery cluster sub-circuits.

[0063] Optionally, the off-state of each circuit breaker, the on-off state of each electric operator, and the current state of each battery cluster main circuit in the aforementioned step 202 may include: among the off-states of each circuit breaker, at least two circuit breakers are in the closed state, at least one electric operator is in the open state, and the current state of each battery cluster main circuit is no current. Here, the battery cluster main circuit where at least two circuit breakers whose off-states are all in the closed state form a distributed energy storage, but the distributed energy storage is not being charged or discharged at the current moment. In this case, only one circuit breaker can be controlled to be in the closed state, and all other circuit breakers can be controlled to be opened, and all electric operators can be controlled to close, so as to form centralized energy storage. Here, only one circuit breaker is controlled to be in the closed state, and the circuit breaker can be any one of the at least two circuit breakers that were previously in the closed state, or any one of the circuit breakers that were previously in the open state.

[0064] Or, optionally, the off state of each circuit breaker, the on / off state of each electrical operator, and the current state of each battery cluster main circuit in the aforementioned step 202 may include: the off state of each circuit breaker is the on state, the on / off state of at least one electrical operator is the open state, and the current state of each battery cluster main circuit is no current. In this case, no distributed energy storage is formed, then only one circuit breaker is controlled to be in the closed state, all other circuit breakers are controlled to be opened, and all electrical operators are controlled to be closed, so as to form centralized energy storage.

[0065] Or, optionally, the off-state of each circuit breaker, the on-off state of at least one electric operator, and the current state of each battery cluster main circuit in the aforementioned step 202 may include: among the off-states of each circuit breaker, the off-states of at least two circuit breakers are both in the closed state, the on-off state of at least one of the electric operators is in the open state, and the current state of at least one battery cluster main circuit is current. Here, the battery cluster main circuit where at least two circuit breakers whose off-states are both in the closed state are located forms a distributed energy storage, and the current state of at least one battery cluster main circuit is current, indicating that the distributed energy storage is being charged and discharged at the current moment. In this case, the battery management system (BMS) is also used to send a charge and discharge prohibition instruction to all energy storage converters (PCS) corresponding to all battery clusters with current, so that all energy storage converters (PCS) corresponding to all battery clusters with current are shut down, and then only one circuit breaker can be controlled to be in the closed state, all other circuit breakers can be controlled to be opened, and all electric operators can be controlled to be closed to form centralized energy storage. Here, only one circuit breaker is controlled to be in the closed state, and the circuit breaker may be any one of the at least two circuit breakers that were previously in the closed state, or any one of the circuit breakers that were previously in the open state. The battery cluster with current here is usually a battery cluster in the main circuit of the battery cluster with the circuit breaker in the closed state.

[0066] Step 203, the battery management system is also used to obtain the inter-cluster voltage difference of all the battery clusters; the inter-cluster voltage difference of all the battery clusters is the difference between the maximum value and the minimum value among the cluster voltages of all the battery clusters; when the inter-cluster voltage difference is less than or equal to the preset voltage difference, the battery management system controls the battery cluster to charge the electric vehicle through the charging gun.

[0067] The battery management module (BMS) is also used to obtain the inter-cluster voltage difference of all battery clusters. The inter-cluster voltage difference of all battery clusters here refers to: subtracting the minimum cluster voltage of all battery clusters from the maximum cluster voltage of all battery clusters. For example, refer to Figure 1 , Figure 2 For example, the mobile energy storage power supply vehicle has a total of 8 battery clusters. The maximum value of the 8 cluster voltages at the same time is subtracted from the minimum value to obtain the inter-cluster pressure difference at that moment.

[0068] It should be noted that in this application, the power size of each battery cluster is not specifically limited, and the power size of the PCS connected to each battery cluster is not specifically limited. Figure 1 , Figure 2 In the example, each battery cluster is connected to a 100KW PCS.

[0069] As mentioned above, in the case of centralized energy storage, all battery cluster sub-circuits are pathways. The inter-cluster voltage difference is less than or equal to the preset voltage difference, which means that the cluster voltages of each battery cluster are more consistent. In this case, all battery cluster sub-circuits can charge the electric vehicle through the charging gun, and the power-on process is carried out to control all battery cluster sub-circuits to charge the electric vehicle through the charging gun.

[0070] It should be noted that the preset pressure difference here may be different for different mobile energy storage power supply vehicles, or, for the same mobile energy storage power supply vehicle, the preset pressure difference here may be different at different times. There is no limitation on the specific size of the preset pressure difference. The preset pressure difference is determined to ensure that the cluster voltages of each battery cluster are more consistent. When the cluster voltages of each battery cluster are more consistent, the battery life is longer.

[0071] Step 204: After the electric vehicle is fully charged, the battery management system sends a charging prohibition instruction to the charging gun, so that the charging gun stops discharging.

[0072] After the electric vehicle is fully charged, the battery management system (BMS) sends a charging prohibition instruction to the charging gun, so that the charging gun stops discharging.

[0073] Step 205, when the circuit where the electric operator is located has no current for a period greater than or equal to a preset period, the battery management system controls each of the electric operators to open the circuit, and controls the off state of at least two of the circuit breakers to the closed state, so as to switch from centralized energy storage to distributed energy storage.

[0074] After the charging gun stops discharging, the circuit where the switch is located will normally tend to have a current of 0. Here, the circuit where the switch is located has no current, which can be considered to mean that the current in the circuit where the switch is located is 0, or is less than or equal to a threshold value. If the duration of no current in the circuit where the switch is located is greater than or equal to the preset duration, it can be considered that it is safe to convert to distributed energy storage at this time. The battery management system (BMS) controls each switch to open the circuit, that is, controls each switch to disconnect, and controls the off state of at least two circuit breakers to be in the closed state. The at least two battery cluster main circuits where the at least two circuit breakers whose off state is in the closed state are located form distributed energy storage, thereby realizing the switch from centralized energy storage to distributed energy storage. For example, referring to Figure 1 , Figure 2 Here, if the shutdown states of the 8 circuit breakers are all in the closed state, the 8 100KW PCSs involved in the distributed PCS solution are uniformly controlled by the PCS coordination controller, and the battery cluster main circuit where the 8 battery clusters are located forms a distributed energy storage.

[0075] It should be noted that the preset time here can indicate that the circuit where the electric control is located has been without current for a long time, and it is safer to convert to distributed energy storage at this time. There is no limit on the specific size of the preset time. For example, the preset time can be 3 seconds.

[0076] It should be noted that the aforementioned step 205 is an automated implementation of switching from centralized energy storage to distributed energy storage. This step 205 can also be implemented manually, and the manual implementation process mainly involves manual opening of the electric operator and manual closing of the circuit breaker.

[0077] Optionally, the aforementioned battery management system (BMS) may include: slave control, master control and display control. For example, Figure 5 In the specification, BMU refers to slave control, BCMU refers to master control, BSMU refers to display control, and the slave control here can also be called PACK management unit, which is an electronic package. The master control can also be called cluster management unit, and the display control can also be called stack management unit. The master control is connected to the display control through a LAN interface. The master control is connected to the circuit breaker, and the display control is connected to the electric operator. The battery cluster includes: a number of batteries, and the specific number of batteries in a battery cluster is not specifically limited. The slave control is used to obtain the voltage of each battery and the temperature of at least some of the batteries, and to locally characterize the use status of the mobile energy storage power supply vehicle. The master control is used to control the circuit breaker to perform closing and opening operations, and the display control is used to control the electric operator to perform closing and opening operations. It should be noted that the aforementioned may be the master control sending a charging prohibition instruction.

[0078] Optional, see Figure 5 , Figure 6 , the mobile energy storage power supply vehicle also includes: a PCS coordination controller and an energy management system (EMS), and the energy management system is not shown in the figure. The energy management system is connected to the PCS coordination controller, and at the same time, the energy management system is also connected to the battery management system. It should be noted that the connections mentioned in the full text may refer to communication connections, which may be wired connections or wireless connections, and there is no specific limitation on this. The PCS coordination controller and the PCS can be electrically connected, and an optical fiber is arranged between the PCS coordination controllers of the two mobile energy storage power supply vehicles. The method also includes: the energy management system (EMS) controls the two mobile energy storage power supply vehicles to work collaboratively based on the optical fiber. The collaborative work here mainly refers to power coordination and balance control, so that multiple mobile energy storage power supply vehicles can flexibly adapt to various application scenarios and needs. More specifically, when multiple mobile energy storage power supply vehicles work in collaboration, power coordination and balance control are required to ensure the energy exchange balance and work coordination between the mobile energy storage power supply vehicles. As Figure 6This is the communication topology when the two vehicles work together. To ensure that the frequency and output voltage of the PCS are basically consistent when the two vehicles work together, optical fiber communication is used between the PCS coordination controllers on the two vehicles. The use of optical fiber communication makes the communication speed fast. It should be noted that the PCS coordination controllers on the two vehicles can also communicate in other ways, and there is no specific limitation on other ways. Figure 6 The battery system here refers to the battery management system, the energy storage vehicle refers to the mobile energy storage power supply vehicle, and the mains power refers to the substitute power grid.

[0079] Optional, see Figure 1 , a dual power transfer switch (STS) is set between the energy storage converter (PCS) and the power grid. In the grid-connected mode, the BMS controls the STS to close the switch, and the STS is connected to the grid after being synchronized with the grid. At this time, both the grid and the energy storage battery can supply power to the load. EMS can perform peak-valley scheduling according to the grid load situation and the peak-valley price difference, and use the mobile energy storage power supply vehicle to charge during the low load period of the grid and discharge during the peak load period of the grid. Through load forecasting and power scheduling, the system load situation and battery energy storage situation can be understood in advance, and the power output tasks of the two power supply vehicles can be reasonably arranged to avoid power imbalance or overload problems. And when the grid and the grid load supply power to the load at the same time, the EMS can adjust the grid load output power according to the load demand and battery status to ensure that the output of the grid load is the largest, so as to achieve grid load balance and energy conservation and emission reduction.

[0080] In off-grid conditions, the BMS first controls the STS to open and switch to off-grid mode. Through the optical fiber communication between the PCS coordination controllers of the two mobile energy storage power supply vehicles, the PCS coordination controller will automatically adjust the power output according to the load conditions. The two vehicles will evenly share the required load power output, and the load will be powered by the battery clusters of the two mobile energy storage power supply vehicles. In this application, the STS can be set to achieve fast switching between on-grid and off-grid.

[0081] In summary, this application combines centralized energy storage and distributed energy storage, and different solutions can be adopted according to different needs and scenarios. When multiple vehicles work together, power coordination and balance control can be carried out to ensure the energy exchange balance and work coordination between the mobile energy storage power supply vehicles, and to ensure the power demand of the mobile energy storage power supply vehicles in different working scenarios, thereby achieving precise control of power output and charging process, improving system performance, and extending battery life. At the same time, under distributed energy storage, the inter-cluster circulation problem can be solved, and the battery life can be protected. In addition, the distributed energy storage adopts a one-cluster-one-management mode, and the system with problems in a single cluster can still operate, with high reliability and fault tolerance.

[0082] It should be noted that, for the method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present application are not limited by the described order of actions, because according to the embodiments of the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present application.

[0083] The present application also provides a control device for a mobile energy storage power supply vehicle, the mobile energy storage power supply vehicle comprising: a plurality of battery cluster main circuits, a plurality of battery cluster secondary circuits and a battery management system; one of the battery cluster main circuits corresponds to one of the battery cluster secondary circuits, and one of the battery cluster main circuits and a corresponding battery cluster secondary circuit share a battery cluster, the battery cluster main circuit also comprises: an energy storage inverter and a circuit breaker connected in sequence to the battery clusters; the battery cluster secondary circuit corresponding to the battery cluster main circuit also comprises: an electric control connected in sequence to the battery clusters; the energy storage inverter and the circuit breaker connected in sequence in the battery cluster main circuit are connected in parallel with the electric control in the battery cluster secondary circuit corresponding to the battery cluster main circuit; the energy storage inverter is also connected to a load; the battery management system is connected to the circuit breaker and the electric control; the mobile energy storage power supply vehicle can refer to the aforementioned relevant records, and in order to avoid repetition, they will not be repeated here.

[0084] Reference Figure 7 The control device of the mobile energy storage power supply vehicle may include: a control module 301, which is used to control the battery management system to detect the off state of the circuit breaker of each battery cluster main circuit, detect the on and off state of each electric operator, and detect the current state of each battery cluster main circuit; a switching module 302, which is used for the battery management system to switch to centralized energy storage by controlling the circuit breaker and the electric operator based on the off state of each circuit breaker, the on and off state of each electric operator, and the current state of each battery cluster main circuit.

[0085] The control device of the mobile energy storage power supply vehicle has the same or similar beneficial effects as the control method of the mobile energy storage power supply vehicle described above, and will not be described again here to avoid repetition.

[0086] Optionally, the mobile energy storage power supply vehicle also includes: a DC converter and a charging gun; the battery cluster secondary circuit is connected to the DC converter and the charging gun in sequence; the switching module 302 may include: a switching sub-module, which is used for controlling only one of the circuit breakers to be in a closed state, controlling the opening and closing of all the remaining circuit breakers, and controlling all the electrical operators to close the switches when the electric vehicle needs to be charged, based on the off state of each circuit breaker, the on and off state of each electrical operator, and the current state of each main circuit of the battery cluster, so as to switch to centralized energy storage.

[0087] Optionally, the battery management system is further used to obtain the inter-cluster voltage difference of all the battery clusters; the inter-cluster voltage difference of all the battery clusters is the difference between the maximum value and the minimum value of each cluster voltage of all the battery clusters; the device also includes:

[0088] The charging module is used for controlling the battery cluster to charge the electric vehicle through the charging gun when the voltage difference between the clusters is less than or equal to the preset voltage difference.

[0089] Optionally, the off state of each of the circuit breakers, the on / off state of each of the electric controls, and the current state of each of the main circuits of the battery clusters include:

[0090] Among the off states of the circuit breakers, at least two of the circuit breakers are in the closed state, at least one of the switch states of the electric controller is in the open state, and the current state of the main circuits of the battery clusters is no current; or,

[0091] The off states of the circuit breakers are all in the open state, the on / off state of at least one of the electric controls is in the open state, and the current state of the main circuits of the battery clusters is no current; or,

[0092] Among the off-states of the circuit breakers, at least two of the circuit breakers are in the closed state, at least one of the switch states of the electric operator is in the open state, and the current state of the main circuit of at least one battery cluster is current. The battery management system is also used to send a charge and discharge prohibition instruction to all energy storage inverters corresponding to all battery clusters with current, so that all energy storage inverters corresponding to all battery clusters with current are shut down.

[0093] Optionally, the device further comprises:

[0094] A sending module, configured to enable the battery management system to send a charging prohibition instruction to the charging gun after the electric vehicle is fully charged, so that the charging gun stops discharging;

[0095] The state change module is used to control the battery management system to open the circuit breaker of each electric operator and control the off state of at least two circuit breakers to the closed state when the circuit breaker where the electric operator is located has no current for a period greater than or equal to a preset period of time, so as to switch from centralized energy storage to distributed energy storage.

[0096] Optionally, the battery management system includes: a slave control, a master control and a display control; the master control is connected to the circuit breaker, and the display control is connected to the electric operator; the battery cluster includes: a number of batteries, the slave control is used to obtain the voltage of each of the batteries, and the temperature of at least some of the batteries, the master control is used to control the circuit breaker to perform closing and opening operations, and the display control is used to control the electric operator to perform closing and opening operations.

[0097] Optionally, the mobile energy storage power supply vehicle further includes: a PCS coordination controller and an energy management system, an optical fiber is provided between the PCS coordination controllers of the two mobile energy storage power supply vehicles, and the device further includes:

[0098] A collaborative module is used for the energy management system to control the two mobile energy storage power supply vehicles to work collaboratively based on the optical fiber.

[0099] Optionally, a dual power conversion switch is provided between the energy storage converter and the power grid; the device further comprises:

[0100] A closing module, used for controlling the battery management system to close the dual power conversion switch in the grid-connected mode, so that the battery clusters of the two mobile energy storage power supply vehicles and the grid jointly supply power to the load; or,

[0101] The opening module is used for controlling the dual power conversion switch to open in the off-grid mode, so that the battery clusters of the two mobile energy storage power supply vehicles can supply power to the load.

[0102] The present invention also provides an electronic device, comprising: a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the control method of the mobile energy storage power supply vehicle when executing the program.

[0103] The present invention also provides a readable storage medium, when the instructions in the storage medium are executed by a processor of an electronic device, the electronic device can execute the steps of the control method of the mobile energy storage power supply vehicle.

[0104] The present invention also provides a computer program product, including a computer program, which implements the steps of the aforementioned control method of the mobile energy storage power supply vehicle when executed by a processor.

[0105] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0106] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0107] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A control method for a mobile energy storage power supply vehicle, characterized in that: The mobile energy storage power supply vehicle includes: multiple battery cluster main circuits, multiple battery cluster secondary circuits and a battery management system; one of the battery cluster main circuits corresponds to one of the battery cluster secondary circuits, and one of the battery cluster main circuits and the corresponding battery cluster secondary circuit share a battery cluster, the battery cluster main circuit also includes: an energy storage inverter and a circuit breaker connected to the battery cluster in sequence; the battery cluster secondary circuit corresponding to the battery cluster main circuit also includes: an electric controller connected to the battery cluster in sequence; the energy storage inverter and circuit breaker connected in sequence in the battery cluster main circuit are connected in parallel with the electric controller in the battery cluster secondary circuit corresponding to the battery cluster main circuit; the energy storage inverter is also connected to a load; the battery management system is connected to the circuit breaker and the electric controller; the control method includes: Controlling the battery management system to detect the off state of the circuit breaker of each of the battery cluster main circuits, the on / off state of each of the electric controls, and the current state of each of the battery cluster main circuits; The battery management system switches to centralized energy storage by controlling the circuit breakers and the electric operators based on the off state of each circuit breaker, the on / off state of each electric operator, and the current state of each main circuit of the battery cluster.

2. The control method of the mobile energy storage power supply vehicle according to claim 1, characterized in that: The mobile energy storage power supply vehicle further includes: a DC converter and a charging gun; the battery cluster secondary circuit is connected to the DC converter and the charging gun in sequence; the battery management system controls the circuit breakers and the electric operators based on the off state of each circuit breaker, the on / off state of each electric operator, and the current state of each main circuit of the battery cluster to switch to centralized energy storage, including: When the electric vehicle needs to be charged, the battery management system controls only one circuit breaker to be in the closed state based on the off state of each circuit breaker, the on and off state of each electrical operator, and the current state of each battery cluster main circuit, controls the opening and closing of all other circuit breakers, and controls all electrical operators to close, so as to switch to centralized energy storage.

3. The control method of the mobile energy storage power supply vehicle according to claim 2, characterized in that: The battery management system is further used to obtain the inter-cluster voltage difference of all the battery clusters; the inter-cluster voltage difference of all the battery clusters is the difference between the maximum value and the minimum value of the cluster voltages of all the battery clusters; The method further comprises: When the inter-cluster voltage difference is less than or equal to a preset voltage difference, the battery management system controls the battery cluster to charge the electric vehicle through the charging gun.

4. The control method of the mobile energy storage power supply vehicle according to claim 2, characterized in that: The off state of each of the circuit breakers, the on / off state of each of the electric controls, and the current state of each of the main circuits of the battery clusters include: Among the off states of the circuit breakers, at least two of the circuit breakers are in the closed state, at least one of the switch states of the electric controller is in the open state, and the current state of the main circuits of the battery clusters is no current; or, The off states of the circuit breakers are all in the open state, the on / off state of at least one of the electric controls is in the open state, and the current state of the main circuits of the battery clusters is no current; or, Among the off-states of the circuit breakers, at least two of the circuit breakers are in the closed state, at least one of the switch states of the electric operator is in the open state, and the current state of the main circuit of at least one battery cluster is current. The battery management system is also used to send a charge and discharge prohibition instruction to all energy storage inverters corresponding to all battery clusters with current, so that all energy storage inverters corresponding to all battery clusters with current are shut down.

5. The control method of the mobile energy storage power supply vehicle according to claim 3, characterized in that: The method further comprises: After the electric vehicle is fully charged, the battery management system sends a charging prohibition instruction to the charging gun, so that the charging gun stops discharging; When the circuit where the electric controller is located is without current for a period of time greater than or equal to a preset period of time, the battery management system controls each of the electric controllers to open, and controls the off state of at least two of the circuit breakers to the closed state, so as to switch from centralized energy storage to distributed energy storage.

6. The control method of the mobile energy storage power supply vehicle according to any one of claims 1 to 5, characterized in that: The battery management system includes: a slave control, a master control and a display control; the master control is connected to the circuit breaker, and the display control is connected to the electric operator; the battery cluster includes: a plurality of batteries, the slave control is used to obtain the voltage of each battery and the temperature of at least part of the batteries, the master control is used to control the circuit breaker to perform closing and opening operations, and the display control is used to control the electric operator to perform closing and opening operations.

7. The control method of the mobile energy storage power supply vehicle according to any one of claims 1 to 5, characterized in that: The mobile energy storage power supply vehicle further includes: a PCS coordination controller and an energy management system, an optical fiber is provided between the PCS coordination controllers of the two mobile energy storage power supply vehicles, and the method further includes: The energy management system controls the two mobile energy storage power supply vehicles to work in coordination based on the optical fiber.

8. The control method of the mobile energy storage power supply vehicle according to claim 7, characterized in that: A dual power conversion switch is provided between the energy storage converter and the power grid; the method further comprises: In the grid-connected mode, the battery management system controls the dual power conversion switch to close, so that the battery clusters of the two mobile energy storage power supply vehicles and the power grid jointly supply power to the load; or, In the off-grid mode, the battery management system controls the dual power conversion switch to open, so that the battery clusters of the two mobile energy storage power supply vehicles supply power to the load.

9. A control device for a mobile energy storage power supply vehicle, characterized in that: The mobile energy storage power supply vehicle includes: a plurality of battery cluster main circuits, a plurality of battery cluster secondary circuits and a battery management system; one of the battery cluster main circuits corresponds to one of the battery cluster secondary circuits, and one of the battery cluster main circuits and the corresponding battery cluster secondary circuit share a battery cluster, the battery cluster main circuit also includes: an energy storage converter and a circuit breaker connected in sequence to the battery cluster; the battery cluster secondary circuit corresponding to the battery cluster main circuit also includes: an electric controller connected in sequence to the battery cluster; the energy storage converter and the circuit breaker connected in sequence in the battery cluster main circuit are connected in parallel with the electric controller in the battery cluster secondary circuit corresponding to the battery cluster main circuit; the energy storage converter is also connected to a load; the battery management system is connected to the circuit breaker and the electric controller; the control device includes: A control module, used to control the battery management system to detect the off state of the circuit breaker of each of the battery cluster main circuits, detect the on and off state of each of the electric controls, and detect the current state of each of the battery cluster main circuits; The switching module is used for the battery management system to switch to centralized energy storage by controlling the circuit breakers and the electric operators based on the off state of each circuit breaker, the on / off state of each electric operator, and the current state of each battery cluster main circuit.

10. An electronic device, characterized in that: include: A processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the control method of the mobile energy storage power supply vehicle as described in any one of claims 1 to 8 when executing the program.

11. A readable storage medium, characterized in that: When the instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the control method of a mobile energy storage power supply vehicle according to any one of claims 1 to 8.

12. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the control method of the mobile energy storage power supply vehicle according to any one of claims 1 to 8 is implemented.

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