Power distribution method, charging and discharging system, charging and discharging control unit, and medium

Abstract

The application discloses a power distribution method, a charging and discharging system, a charging and discharging control unit and a medium, and is applied to the technical field of electric vehicles, so as to solve the problems that the power satisfaction rate and the power module utilization rate are both low in a power matching method. Specifically, a target power module group and power modules in the group are distributed to a vehicle to be charged and discharged according to the rated charging and discharging power and the rated output voltage range of each power module group; in the charging and discharging process, the number of the distributed power modules in the target power module group is adjusted based on the real-time demand power, or a newly distributed target power module group is distributed to the vehicle to be charged and discharged based on the real-time demand power. The power modules with different rated output voltage ranges are mixed and used, the number of the distributed power modules or the newly distributed power module group is adjusted according to the real-time demand power, the accurate power supply is ensured, and the power satisfaction rate and the power module utilization rate are improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a power distribution method, a charging and discharging system, a charging and discharging control unit, and a medium. Background Art

[0002] In the field of electric vehicles, with the diversification of vehicle types and charging and discharging requirements, existing charging and discharging systems face challenges in power module configuration and high-power charging and discharging.

[0003] On the one hand, traditional charging and discharging systems often use a single type of power module, making it difficult to meet the changing charging and discharging requirements in different scenarios. To address this challenge, existing solutions have adopted a hybrid approach of using unidirectional and bidirectional power modules within existing charging and discharging systems. However, while this hybrid approach improves the flexibility of the charging and discharging system, it also introduces complexity in the power module group and its allocation strategy. Furthermore, existing charging and discharging systems also have shortcomings in their power matching strategies for electric vehicles with different voltage platforms. Due to the diversity of vehicle voltage platforms, charging and discharging systems often require modules with different power and voltage ranges to meet charging and discharging requirements. However, in practice, these issues often lead to inaccurate power matching, significant power waste, and low module utilization. This not only impacts charging and discharging efficiency and user experience, but also increases the operating costs of the charging and discharging system. Therefore, optimizing power matching methods to achieve high power satisfaction, minimize power waste, and maximize module utilization has become a pressing technical challenge in the electric vehicle industry. Summary of the Invention

[0004] The present application provides a power distribution method, a charging and discharging system, a charging and discharging control unit and a medium, which are used to solve the problems of low power satisfaction rate and power module utilization rate in the prior art.

[0005] The technical solutions provided in this application are as follows:

[0006] In one aspect, the present application provides a power distribution method applied to a charge and discharge control unit in a charge and discharge system, wherein the charge and discharge system further includes a plurality of power module groups, each power module group being composed of a plurality of unidirectional power modules and / or bidirectional power modules having different rated output voltage ranges, the method comprising:

[0007] Obtaining the initial charge and discharge information of the vehicle to be charged and discharged, the rated charge and discharge power of each power module group, and the corresponding rated output voltage range;

[0008] Determining the charging / discharging voltage level and initial required power of the vehicle to be charged / discharged based on the initial charging / discharging information;

[0009] According to the rated charge and discharge power and rated output voltage range of each power module group, a target power module group that meets the initial required power is sequentially allocated to the vehicle to be charged and discharged, and multiple unidirectional power modules and / or bidirectional power modules that meet the charge / discharge voltage level are allocated to the target power module group;

[0010] During the charging and discharging process, real-time charging and discharging information of the vehicle to be charged and discharged is obtained, and the real-time required power of the vehicle to be charged and discharged is determined based on the real-time charging and discharging information;

[0011] Based on the real-time power demand, the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group is adjusted, or based on the real-time power demand, a new target power module group is allocated to the vehicle to be charged or discharged.

[0012] Optionally, based on the real-time required power, the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group is adjusted, including:

[0013] When the real-time required power is less than or equal to the rated charge and discharge power of the target power module group, and the real-time required power is greater than the minimum charge and discharge power of the target power module group, the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group is adjusted; wherein the minimum charge and discharge power is the minimum power among the rated charge and discharge powers of multiple unidirectional power modules and / or bidirectional power modules in the target power module group.

[0014] Optionally, adjusting the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group includes:

[0015] When the real-time required power is greater than the actual output power of the target power module group, obtaining the real-time charge / discharge voltage of the vehicle to be charged / discharged and the actual output current of the target power module group; determining the real-time required current based on the real-time charge / discharge voltage and the real-time required power; and when the difference between the real-time required current and the actual output current of the current power module group is greater than a current threshold, increasing the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group so that the actual output power of the target power module group meets the real-time required power.

[0016] When the real-time required power is less than the actual output power of the target power module group, the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group is reduced so that the actual output power of the target power module group meets the real-time required power.

[0017] Optionally, based on the real-time power demand, a new target power module group is allocated to the vehicle to be charged or discharged, including:

[0018] When the real-time required power is greater than the rated charge and discharge power of the target power module group, a newly allocated target power module group is allocated to the vehicle to be charged and discharged;

[0019] When the real-time required power is less than or equal to the minimum charge and discharge power of the target power module group, a newly allocated target power module group is allocated to the vehicle to be charged or discharged.

[0020] Optionally, when the real-time required power is greater than the rated charge and discharge power of the target power module group, a new target power module group is allocated to the vehicle to be charged or discharged, including:

[0021] When there is a power module group that meets the real-time power demand among the power module groups in the idle state, the power module group that meets the real-time power demand is used as the newly allocated target power module group, and the newly allocated target power module group replaces the target power module group allocated to the vehicle to be charged or discharged;

[0022] When there is no power module group that meets the real-time power requirement among the power module groups in the idle state, based on the first power difference between the real-time power requirement and the actual output power of the allocated target power module group, a power module group that meets the first power difference is determined from the power module groups in the idle state as the newly allocated target power module group, and the newly allocated target power module group is allocated to the vehicle to be charged and discharged.

[0023] Optionally, when the real-time required power is less than the minimum charge and discharge power of the target power module group, a new target power module group is allocated to the vehicle to be charged or discharged, including:

[0024] From the power module groups in the idle state, a power module group that meets the real-time power demand and whose rated charge and discharge power is less than the allocated target power module group is determined as the newly allocated target power module group, and the newly allocated target power module group replaces the target power module group allocated to the vehicle to be charged and discharged.

[0025] Optionally, replacing the target power module group already allocated to the vehicle to be charged or discharged with the newly allocated target power module group includes:

[0026] Pre-charge the newly allocated target power module group;

[0027] At the end of the pre-charging process, the newly assigned target power module group is connected to the vehicle to be charged or discharged;

[0028] Under the premise of ensuring that the sum of the actual output power of the newly allocated target power module group and the actual output power of the already allocated target power module group is equal to the real-time required power, reduce the actual output power of the already allocated target power module group and increase the actual output power of the newly allocated target power module group;

[0029] When the actual output power of the allocated target power module group decreases to the average output power, the connection between the allocated target power module group and the vehicle to be charged or discharged is disconnected; wherein the average output power is the ratio of the real-time required power to the total number of the newly allocated target power module group and the allocated target power module group;

[0030] Increase the actual output power of the newly allocated target power module group to the real-time required power.

[0031] Optionally, the newly allocated target power module group is allocated to the vehicle to be charged or discharged, including:

[0032] Pre-charge the newly allocated target power module group;

[0033] After the pre-charging process is completed, the newly assigned target power module group is connected to the vehicle to be charged or discharged;

[0034] The actual output power of the newly allocated target power module group and the already allocated target power module group is adjusted to the average output power; wherein the average output power is the ratio of the real-time required power to the total number of the newly allocated target power module group and the already allocated target power module group.

[0035] Optionally, the power allocation method further includes:

[0036] When there are multiple target power module groups allocated to the vehicles to be charged or discharged, and a first number of target power module groups among the multiple target power module groups have a total rated power greater than or equal to the real-time required power, stopping allocating a second number of target power module groups to the vehicles to be charged or discharged;

[0037] The total rated power is the sum of the rated powers of the multiple target power module groups, and the sum of the first number and the second number is the total number of target power module groups that have been allocated to the vehicles to be charged or discharged.

[0038] Optionally, the power allocation method further includes:

[0039] When the real-time power demand of the vehicle to be charged or discharged is less than the trickle charging threshold, the target power module group is stopped from being allocated to the vehicle to be charged or discharged, and the energy storage device is allocated to the vehicle to be charged or discharged so that the energy storage device charges the vehicle to be charged or discharged. The trickle charging threshold is the maximum power for trickle charging of the vehicle to be charged or discharged.

[0040] On the other hand, the present application provides a charging and discharging system, comprising: a plurality of power module groups, a plurality of power switch units, a plurality of charging and discharging terminals, a first control switch, and a charging and discharging control unit;

[0041] The power grid is connected to the plurality of power module groups through a first control switch; each power switch unit is connected to each power module group; each power switch unit is connected to a corresponding charging and discharging terminal; the charging and discharging terminal is connected to the vehicle to be charged and discharged; the charging and discharging control unit is respectively connected to the plurality of power module groups, the plurality of power switch units, the plurality of charging and discharging terminals, and the first control switch;

[0042] The charge and discharge control unit is used to adopt the above-mentioned power distribution method to control the power switch unit to connect the circuit connection between each power module group and the charge and discharge terminal, so as to charge and discharge the vehicle to be charged and discharged connected to the charge and discharge terminal in sequence through the power module group, the power switch unit and the charge and discharge terminal.

[0043] Optionally, the charging and discharging system further includes: an energy storage device and a second control switch; the energy storage device is connected to each power module group via the second control switch; and the charging and discharging control unit is in communication with the second control switch;

[0044] The energy storage device is used to store energy input to the charging and discharging terminal through the power module group and the power switch unit; and is also used to output the stored energy to the charging and discharging terminal through the power module group and the power switch unit;

[0045] The second control switch is used to connect or disconnect the energy storage cabinet from each power module group under the control of the charge and discharge control unit.

[0046] Optionally, the charging and discharging system further includes: an energy storage device and a first selection switch; a common contact of the first selection switch is connected to each power module group, a first contact of the first selection switch is connected to the power grid, and a second contact of the first selection switch is connected to the energy storage device; and a charging and discharging control unit is communicatively connected to the first selection switch;

[0047] The energy storage device is used to store energy input to the charging and discharging terminal through the power module group and the power switch unit, and is also used to output the stored energy to the charging and discharging terminal through the power switch unit;

[0048] The first selection switch is used to control the connection between the energy storage device and each power switch unit when the real-time power demand of the vehicle to be charged or discharged is less than the trickle charging threshold. When the real-time power demand of the vehicle to be charged or discharged is not less than the trickle charging threshold, the power module distribution device controls the connection between the power grid and each power module group.

[0049] On the other hand, the present application provides a charge and discharge control unit, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the power distribution method provided in the present application is implemented.

[0050] On the other hand, the present application also provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed by a processor, the power distribution method provided by the present application is implemented.

[0051] The beneficial effects of this application are as follows:

[0052] In this application, by mixing and using unidirectional power modules and / or bidirectional power modules with different rated output voltage ranges in a power module group, and matching a suitable power module group and its internal unidirectional power modules and / or bidirectional power modules according to the initial charge and discharge information of the vehicle to be charged and discharged and the characteristics of each power module group, it is possible to more flexibly meet the diverse power requirements of the vehicle to be charged and discharged, improve the power satisfaction rate, and ensure the efficient progress of the charging and discharging process. During the charging and discharging process, it is possible to respond to the real-time power demand changes of the vehicle, flexibly adjust the number of allocated unidirectional power modules and / or bidirectional power modules in the power module group, or allocate a newly allocated power module group. This dynamic adjustment method can, on the one hand, ensure the accurate supply of power and greatly improve the utilization rate of the module. On the other hand, it also enhances the adaptability and response speed of the system, providing users with a more efficient and flexible charging and discharging experience.

[0053] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description or be understood by practicing the present application. The purposes and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0055] Figure 1 Schematic diagram of the power distribution method in the embodiment of the present application;

[0056] Figure 2 Schematic diagram of the overview process of replacing the target power module group in an embodiment of the present application;

[0057] Figure 3 This is a schematic diagram of replacing a 20KW target power module group with a 30KW target power module group in an embodiment of the present application;

[0058] Figure 4 This is a schematic diagram of an overview flow chart added to the target power module group in the embodiment of the present application;

[0059] Figure 5This is a schematic diagram of adding a target power module group of 30KW in an embodiment of the present application;

[0060] Figure 6 This is a schematic diagram of a target power module group for reducing 30KW in an embodiment of the present application;

[0061] Figure 7 This is a schematic diagram of the first functional structure of the charging and discharging system in the embodiment of the present application;

[0062] Figure 8 This is a schematic diagram of the second functional structure of the charging and discharging system in the embodiment of the present application;

[0063] Figure 9 This is a schematic diagram of the third functional structure of the charging and discharging system in the embodiment of the present application;

[0064] Figure 10 Schematic diagram of the hardware structure of the charge and discharge control unit in the embodiment of the present application. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solutions and beneficial effects of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0066] The present invention provides a power distribution method for a charge-discharge control unit in a charge-discharge system. The charge-discharge system further includes a plurality of power module groups, each of which is composed of a plurality of unidirectional power modules and / or bidirectional power modules with different rated output voltage ranges. The charge-discharge control unit is in communication with the plurality of power module groups. Figure 1 As shown, the overview process of the power allocation method provided in the embodiment of the present application is as follows:

[0067] Step 101: Acquire initial charge and discharge information of the vehicle to be charged and discharged, the rated charge and discharge power of each power module group, and the corresponding rated output voltage range.

[0068] In practical applications, the vehicles to be charged and discharged can be electric vehicles, electric buses, and other electrically powered vehicles. An electric vehicle (EV) is a vehicle that uses batteries to store energy and is driven by an electric motor. The charging and discharging processes are the two main processes in an electric vehicle: charging is the input of electrical energy into the EV's battery, and discharging is the conversion of the electrical energy in the battery into kinetic energy to drive the vehicle. Initial charge and discharge information includes the initial charge / discharge voltage, initial charge / discharge current, and initial battery SOC (State of Charge) value at the time the vehicle to be charged and discharged is connected. The power module group consists of multiple unidirectional power modules and / or bidirectional power modules with different rated output voltage ranges. The rated charge and discharge power of the power module group includes the rated charge power of the power module group and the rated discharge power of the power module group. The rated charge power of the power module group refers to the sum of the rated charge powers of all unidirectional power modules and all bidirectional power modules in the power module group. The rated discharge power of the power module group refers to the sum of the rated discharge powers of all bidirectional power modules in the power module group. The rated output voltage range refers to the output voltage range of each unidirectional power module and / or bidirectional power module in the power module group.

[0069] Step 102: Based on the initial charge and discharge information, determine the charge / discharge voltage level and initial required power of the vehicle to be charged or discharged.

[0070] In practical applications, the initial required power is the charging power or discharging power at the time the vehicle to be charged or discharged is connected. The charging power at the time the vehicle to be charged or discharged is connected can be determined based on the product of the initial charging voltage and the initial charging current in the initial charging and discharging information. The discharging power at the time the vehicle to be charged or discharged is connected can be determined based on the product of the discharge voltage and the discharge current in the initial charging and discharging information. The charging / discharging voltage level of the vehicle to be charged or discharged corresponding to the initial battery SOC value can be determined based on the initial battery SOC value in the charging and discharging information. The corresponding relationship between the initial battery SOC value and the charging / discharging voltage level of the vehicle to be charged or discharged is pre-stored in the charging and discharging control unit. The charging / discharging voltage level includes a charging voltage level and a discharging voltage level. The charging voltage level can be set to 50V, 400V, 600V and 800V, and the discharging voltage level can be set to 50V, 400V, 600V and 800V.

[0071] Step 103: Based on the rated charge and discharge power and rated output voltage range of each power module group, target power module groups that meet the initial required power are sequentially allocated to the vehicles to be charged and discharged, and multiple unidirectional power modules and / or bidirectional power modules that meet the charge / discharge voltage level are allocated in the target power module groups.

[0072] In actual applications, when the charge and discharge control unit determines the target power module group, it can first determine the idle power module group that meets the initial power requirement based on the initial power requirement and rated output voltage range of the vehicle to be charged and discharged. If there are multiple power module groups that can meet the initial power requirement, they can be further screened based on the maximum power requirement of the vehicle to be charged and discharged. That is, from the multiple power module groups that meet the initial power requirement, the power module group with the smallest difference between the rated charge and discharge power and the maximum power requirement of the vehicle to be charged and discharged is selected as the target power module group. When one power module group can meet the initial power requirement, the target power module group includes one power module group; when multiple power module groups can meet the initial power requirement, the target power module group includes multiple power module groups. After determining the target power module group, when the initial power demand is discharge power, bidirectional power modules that meet the discharge voltage level are allocated to the vehicle to be charged or discharged, and the actual output power of the allocated bidirectional power modules is controlled to be equal to the discharge power at the time the vehicle to be charged or discharged is connected. When the power demand is charging power, if the target power module group includes only unidirectional power modules, unidirectional power modules that meet the charging voltage level are allocated to the vehicle to be charged or discharged, and the actual output power of the allocated unidirectional power modules is controlled to be equal to the charging power at the time the vehicle to be charged or discharged is connected. If the target power module group includes only bidirectional power modules, bidirectional power modules that meet the charging voltage level are allocated to the vehicle to be charged or discharged, and the actual output power of the allocated bidirectional power modules is controlled to be equal to the charging power at the time the vehicle to be charged or discharged is connected. If the target power module group includes both unidirectional and bidirectional power modules, unidirectional power modules that meet the charging voltage level are preferentially allocated to the vehicle to be charged or discharged. If the rated charging power of the unidirectional power modules that meet the charging voltage level in the target power module group cannot meet the power demand, bidirectional power modules that meet the charging voltage level continue to be allocated to the vehicle to be charged or discharged.

[0073] Step 104: During the charging and discharging process, real-time charging and discharging information of the vehicle to be charged and discharged is obtained, and the real-time required power of the vehicle to be charged and discharged is determined based on the real-time charging and discharging information.

[0074] In practical applications, real-time charge and discharge information refers to the demand information of the vehicle to be charged or discharged at a certain moment during the charging or discharging process. The real-time charge and discharge information includes at least the real-time charge / discharge voltage and real-time charge / discharge current of the vehicle to be charged or discharged at a certain moment during the charging or discharging process. The real-time required power refers to the real-time charging power required by the vehicle to be charged or discharged during the charging process, or the real-time discharging power required by the vehicle to be charged or discharged during the discharging process. If the current process is charging, the charge and discharge control unit can communicate with the charge and discharge terminal connected to the vehicle to be charged or discharged to obtain the real-time charging voltage and real-time charging current of the vehicle to be charged or discharged in real time, determine the real-time charging power based on the product of the real-time charging voltage and real-time charging current of the vehicle to be charged or discharged, and use the real-time charging power as the real-time required power. If the current process is discharging, the charge and discharge control unit can communicate with the charge and discharge terminal connected to the vehicle to be charged or discharged to obtain the real-time discharge voltage and real-time discharge current of the vehicle to be charged or discharged in real time, determine the real-time discharge power based on the product of the real-time discharge voltage and real-time discharge current of the vehicle to be charged or discharged, and use the real-time discharge power as the real-time required power.

[0075] Step 105: Based on the real-time power demand, adjust the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group, or allocate a new target power module group to the vehicle to be charged or discharged based on the real-time power demand.

[0076] In actual applications, when the real-time required power changes, when the target power module group can provide the real-time required power, the intra-group allocation adjustment can be performed based on the real-time required power, that is, the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group is adjusted according to the real-time required power; when the target power module group cannot provide the real-time required power, the inter-group allocation adjustment can be performed based on the real-time required power, that is, a newly allocated target power module group is allocated to the vehicle to be charged and discharged, and the real-time required power is provided to the vehicle to be charged and discharged through the newly allocated target power module group, or the real-time required power is provided to the vehicle to be charged and discharged through the newly allocated target power module group and the allocated target power module group.

[0077] Next, the above-mentioned intra-group allocation adjustment process is described in detail. Specifically, based on the real-time required power, the number of unidirectional power modules and / or bidirectional power modules allocated within the target power module group is adjusted in the following manner, but not limited to:

[0078] When the real-time required power is less than or equal to the rated charge and discharge power of the target power module group, and the real-time required power is greater than the minimum charge and discharge power of the target power module group, the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group is adjusted; wherein the minimum charge and discharge power is the minimum power among the rated charge and discharge powers of multiple unidirectional power modules and / or bidirectional power modules in the target power module group.

[0079] In actual applications, when the real-time required power is less than or equal to the rated charge and discharge power of the target power module group and greater than the minimum charge and discharge power of the target power module group, the real-time required power can be output by adjusting the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group and the actual output power. Here, for the intra-group allocation adjustment, the minimum charge and discharge power of the target power module group is set as the lower limit because when the unidirectional power modules and / or bidirectional power modules of the target power module group are operated in a state less than or equal to their minimum charge and discharge power, the efficiency will be significantly reduced, and additional energy consumption and wear may be increased. The idleness of most power modules in the target power module group will also cause additional resources and losses. Therefore, only when the real-time required power is less than or equal to the rated charge and discharge power of the target power module group and greater than the minimum charge and discharge power of the target power module group, the intra-group allocation adjustment is performed.

[0080] In specific implementation, the charge and discharge control unit performs intra-group allocation adjustment, that is, adjusts the number of unidirectional power modules and / or bidirectional power modules allocated within the target power module group, which can be done in but not limited to the following ways:

[0081] The first method: when the real-time required power is greater than the actual output power of the target power module group, the real-time charge / discharge voltage of the vehicle to be charged and discharged and the actual output current of the target power module group are obtained; the real-time required current is determined based on the real-time charge / discharge voltage and the real-time required power; when the difference between the real-time required current and the actual output current of the current power module group is greater than the current threshold, the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group is increased so that the actual output power of the target power module group meets the real-time required power.

[0082] Specifically, when the real-time power demand is greater than the actual output power of the target power module group, the charge and discharge control unit obtains the real-time charge / discharge voltage of the vehicle to be charged and discharged by communicating with the charge and discharge terminal, and the charge and discharge control unit obtains the output current of the target power module group by communicating with the target power module group. Based on the real-time charge / discharge voltage and the real-time power demand, the real-time current demand is determined using the formula P=UI. Where P is the real-time power demand, U is the real-time charge / discharge voltage, and I is the real-time current demand. The difference between the real-time current demand and the actual output current of the current power module group is calculated, and it is determined whether the difference is greater than a preset current threshold. If the difference is greater than the preset current threshold, the number of unidirectional power modules and / or bidirectional power modules allocated within the target power module group is increased so that the actual output power of the target power module group meets the real-time power demand. If the difference is less than or equal to the preset current threshold, the actual output power of the unidirectional power modules and / or bidirectional power modules allocated within the target power module group is adjusted so that the actual output power of the target power module group meets the real-time power demand.

[0083] The second method: when the real-time required power is less than the actual output power of the target power module group, the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group is reduced so that the actual output power of the target power module group meets the real-time required power.

[0084] Specifically, when the real-time power demand is less than the actual output power of the target power module group, the amount of power reduction is determined based on the real-time power demand and the actual output power of the target power module group. When the reduced power is fully provided by the unidirectional power modules and / or bidirectional power modules in the target power module group, the corresponding unidirectional power modules and / or bidirectional power modules are directly disconnected. When the reduced power is not fully provided by the unidirectional power modules and / or bidirectional power modules in the target power module group, some of the unidirectional power modules and / or bidirectional power modules are disconnected, and the real-time power demand is output by the unidirectional power modules and / or bidirectional power modules that are not disconnected in the target power module group.

[0085] In a possible implementation, increasing the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group may be achieved in, but not limited to, the following manners:

[0086] Determine the identification information of the unidirectional power module and / or bidirectional power module that needs to be added, and pre-charge the unidirectional power module and / or bidirectional power module corresponding to the identification information; after the pre-charging process is completed, connect the unidirectional power module and / or bidirectional power module corresponding to the identification information with the vehicle to be charged and discharged; adjust the actual output power of all connected unidirectional power modules and / or bidirectional power modules in the target power module group so that the actual output power of all connected unidirectional power modules and / or bidirectional power modules in the target power module group is the same, and the actual output power of the target power module group is equal to the real-time required power.

[0087] In a possible implementation, reducing the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group may be achieved by, but not limited to, the following methods:

[0088] Determine the identification information of the unidirectional power modules and / or bidirectional power modules that need to be reduced; disconnect the unidirectional power modules and / or bidirectional power modules corresponding to the identification information from the vehicle to be charged and discharged; adjust the actual output power of all connected unidirectional power modules and / or bidirectional power modules in the target power module group so that the actual output power of the target power module group is equal to the real-time required power.

[0089] Next, the above inter-group allocation adjustment process is introduced in detail. Specifically, based on the real-time required power, a new target power module group is allocated to the vehicle to be charged or discharged. The following methods may be used, but are not limited to:

[0090] When the real-time required power is greater than the rated charge and discharge power of the target power module group, a newly allocated target power module group is allocated to the vehicle to be charged or discharged;

[0091] When the real-time required power is less than or equal to the minimum charge and discharge power of the target power module group, a newly allocated target power module group is allocated to the vehicle to be charged or discharged.

[0092] In actual applications, during the charging and discharging process, the real-time power demand increases, making it greater than the rated charge and discharge power of the target power module group, and the target power module cannot provide the real-time power demand. During the charging and discharging process, the real-time power demand decreases, making it less than or equal to the minimum charge and discharge power of the target power module group. The efficiency of using the target power module group is low, and most of the unidirectional power modules and / or bidirectional power modules within the target power module group are idle.

[0093] In specific implementation, when the real-time required power is greater than the rated charge and discharge power of the target power module group, the charge and discharge control unit allocates a new target power module group to the vehicle to be charged and discharged. That is, when the target power module cannot provide the real-time required power, the charge and discharge control unit adjusts the intra-group allocation, which can be done in but not limited to the following ways:

[0094] The first method: when there is a power module group that meets the real-time power demand among the power module groups in the idle state, the power module group that meets the real-time power demand will be used as the newly allocated target power module group, and the newly allocated target power module group will replace the target power module group allocated to the vehicle to be charged and discharged.

[0095] Specifically, the charge and discharge control unit communicates with each power module group to determine each idle power module group among the power module groups, and further determines the rated charge and discharge power of each idle power module group. If there is a power module group in the idle state whose real-time power demand is less than or equal to the rated charge and discharge power of the power module group, and the real-time power demand is greater than the minimum charge and discharge power of the target power module group, then it is determined that there is a power module group in the idle power module group that meets the real-time power demand. If there is only one power module group that meets the real-time power demand, this power module group is used as the newly assigned target power module group. If there are multiple power module groups that meet the real-time power demand, the power module group with the smallest rated charge and discharge power among the multiple power module groups that meet the real-time power demand is used as the newly assigned target power module group. After determining the newly assigned target power module group, the newly assigned target power module group replaces the target power module group already assigned to the vehicle to be charged or discharged, and the charge and discharge control unit controls the newly assigned target power module to output the real-time power demand.

[0096] The second method is that when there is no power module group that meets the real-time power demand among the power module groups in the idle state, based on the first power difference between the real-time power demand and the actual output power of the allocated target power module group, a power module group that meets the first power difference is determined from the power module groups in the idle state as the newly allocated target power module group, and the newly allocated target power module group is allocated to the vehicle to be charged and discharged.

[0097] Specifically, when there is no power module group that meets the real-time power demand among the power module groups in the idle state, if there is a first power difference value that is less than or equal to the rated charge and discharge power of the power module group among the power module groups in the idle state, and the first power difference value is greater than the minimum charge and discharge power of the target power module group, then it is determined that there is a power module group that meets the first power difference value among the power module groups in the idle state. The number of newly allocated target power module groups can be one or more, that is, the first power difference value can be provided by at least one newly allocated target power module group. After determining the newly allocated target power module group, the newly allocated target power module group is allocated to the vehicle to be charged and discharged, and the charge and discharge control unit controls the sum of the actual output power of the newly allocated target power module group and the actual output power of the allocated power module group to be equal to the real-time power demand.

[0098] In specific implementation, when the real-time required power is less than the minimum charge and discharge power of the target power module group, the charge and discharge control unit allocates a newly allocated target power module group to the vehicle to be charged and discharged. That is, when the charge and discharge control unit uses the target power module to provide the real-time required power, the efficiency is low and most of the unidirectional power modules and / or bidirectional power modules inside are idle, the charge and discharge control unit performs an internal allocation adjustment in the group, which can be adopted but not limited to the following methods:

[0099] From the power module groups in the idle state, a power module group that meets the real-time power demand and whose rated charge and discharge power is less than the allocated target power module group is determined as the newly allocated target power module group, and the newly allocated target power module group replaces the target power module group allocated to the vehicle to be charged and discharged.

[0100] Specifically, the charge and discharge control unit communicates with each power module group to determine each power module group in an idle state, and further determines the rated charge and discharge power of each power module group in an idle state. If there is a power module group in each idle state whose real-time demand power is less than or equal to the rated charge and discharge power of the power module group, and whose real-time demand power is greater than the minimum charge and discharge power of the target power module group, and whose rated charge and discharge power is less than the rated charge and discharge power of the allocated target power module group, then it is determined that there is a power module group in each idle state that meets the real-time demand power and whose rated charge and discharge power is less than the allocated target power module group. If there is only one power module group that meets the above requirements, this power module group is used as the newly allocated target power module group; if there are multiple power module groups that meet the above requirements, the power module group with the smallest rated charge and discharge power among the multiple power module groups that meet the above requirements is used as the newly allocated target power module group. After determining the newly allocated target power module group, the newly allocated target power module group replaces the target power module group allocated to the vehicle to be charged and discharged, and the charge and discharge control unit controls the newly allocated target power module to output the real-time required power.

[0101] In one possible implementation, see Figure 2 As shown, the charge and discharge control unit replaces the target power module group assigned to the vehicle to be charged or discharged with the newly assigned target power module group, which can be done in but not limited to the following ways:

[0102] Step 201: Pre-charge the newly allocated target power module group.

[0103] Step 202: After the pre-charging process is completed, the newly assigned target power module group is connected to the vehicle to be charged or discharged.

[0104] Step 203: Under the premise of ensuring that the sum of the actual output power of the newly allocated target power module group and the actual output power of the already allocated target power module group is equal to the real-time required power, reduce the actual output power of the already allocated target power module group and increase the actual output power of the newly allocated target power module group.

[0105] Step 204: When the actual output power of the allocated target power module group decreases to the average output power, the connection between the allocated target power module group and the vehicle to be charged or discharged is disconnected; wherein the average output power is the ratio of the real-time demand power to the total number of the newly allocated target power module group and the allocated target power module group.

[0106] Step 205: Increase the actual output power of the newly allocated target power module group to the real-time required power.

[0107] In actual applications, the identification information of the newly assigned target power module group is determined; the target power module group block corresponding to the identification information is pre-charged; after the pre-charging process is completed, the connection between the newly assigned target power module group corresponding to the identification information and the vehicle to be charged and discharged is connected; the actual output power of the newly assigned target power module group is gradually increased, and the actual output power of the already assigned target power module group is gradually reduced. After the actual output power of the already assigned target power module group is reduced to the average output power, the connection between the already assigned target power module group and the vehicle to be charged and discharged is cut off, and the actual output power of the newly assigned target power module group is increased to the real-time required power.

[0108] For example, if the real-time power requirement increases from 20KW to 30KW, refer to Figure 3 As shown, first, at the end of the pre-charging process, the newly allocated 30KW target power module group is connected to the vehicle to be charged and discharged, and then the actual output power of the newly allocated 30KW target power module group is gradually increased, and the actual output power of the allocated 20KW target power module group is reduced. Finally, when the actual output power of the 20KW target power module group is reduced to 15KW, the allocated 20KW target power module group is turned off, and the actual output power of the newly allocated 30KW target power module group is increased to 30KW.

[0109] Optionally, while the newly assigned target power module group is being pre-charged, the connection between the energy storage device and the vehicle to be charged and discharged can be connected. On the premise that the actual output power of the energy storage device and the actual output power of the assigned target power module group are equal to the real-time required power, the actual output power of the assigned target power module group is reduced, and the actual output power of the energy storage device is increased; when the actual output power of the assigned target power module group is reduced to zero, the connection between the assigned target power module group and the vehicle to be charged and discharged is cut off. Then, the connection between the newly assigned target power module group that has completed the pre-charging process and the vehicle to be charged and discharged is connected. On the premise that the actual output power of the energy storage device and the actual output power of the newly assigned target power module group are equal to the real-time required power, the actual output power of the newly assigned target power module group is increased, and the actual output power of the energy storage device is reduced; when the actual output power of the energy storage device is reduced to zero, the connection between the energy storage device and the vehicle to be charged and discharged is cut off.

[0110] In one possible implementation, see Figure 4 As shown, the charge and discharge control unit allocates the newly allocated target power module group to the vehicle to be charged and discharged, which can be done in the following ways but not limited to:

[0111] Step 401: Pre-charge the newly allocated target power module group.

[0112] Step 402: After the pre-charging process is completed, the newly assigned target power module group is connected to the vehicle to be charged or discharged.

[0113] Step 403: Adjust the actual output power of the newly allocated target power module group and the already allocated target power module group to the average output power; wherein the average output power is the ratio of the real-time required power to the total number of the newly allocated target power module group and the already allocated target power module group.

[0114] In practical applications, the identification information of the newly assigned target power module group is determined; the target power module group corresponding to the identification information is pre-charged; after the pre-charging process is completed, the connection between the newly assigned target power module group corresponding to the identification information and the vehicle to be charged and discharged is connected; the actual output power of the newly assigned target power module group is gradually increased, and the actual output power of the already assigned target power module group is gradually reduced until the actual output powers of the newly assigned target power module group and the already assigned target power module group are adjusted to the average output power.

[0115] For example, if the real-time power requirement increases from 10KW to 40KW, refer to Figure 5 As shown, first, at the end of the pre-charging process, the newly allocated 30KW target power module group is connected to the vehicle to be charged and discharged, and then the actual output power of the newly allocated 30KW target power module group is adjusted to be the same as the actual output power of the allocated 20KW target power module group. Finally, the actual output power of the 20kw target power module group and the actual output power of the 30kw target power module group are jointly increased to an average output power of 20KW.

[0116] In a possible implementation, when there are multiple target power module groups allocated to the vehicle to be charged or discharged, when the real-time power demand decreases, the inter-group allocation adjustment may further include:

[0117] When there are multiple target power module groups allocated to the vehicles to be charged or discharged, and a first number of target power module groups among the multiple target power module groups have a total rated power greater than or equal to the real-time required power, stopping allocating a second number of target power module groups to the vehicles to be charged or discharged;

[0118] The total rated power is the sum of the rated powers of the multiple target power module groups, and the sum of the first number and the second number is the total number of target power module groups that have been allocated to the vehicles to be charged or discharged.

[0119] In actual applications, if the real-time power demand can be provided by the first number of target power module groups among the target power module groups that have been allocated to the vehicle to be charged or discharged, the connection between the remaining second number of target power module groups among the target power module groups that have been allocated to the vehicle to be charged or discharged and the vehicle to be charged or discharged can be disconnected, and the total output power of the target power module groups allocated to the vehicle to be charged or discharged can be adjusted to the real-time power demand. The process of reducing the connection between the second number of target power module groups and the vehicle to be charged can include reducing the actual output power of the first number of target power module groups and the second number of target power module groups; the first number of target power module groups and the second number of target power module groups each bear half of the real-time power demand, and then disconnecting the second number of target power module groups from the vehicle to be charged or discharged, and adjusting the total output power of the first number of target power module groups to the real-time power demand.

[0120] For example, if the real-time power requirement is reduced from 50KW to 10KW, refer to Figure 6 As shown, first, the actual output power of the two target power module groups is reduced so that the actual output power of each target power module group is 5KW to ensure the real-time required power. Then, the actual output power of the 20kw target power module group is gradually increased, and the actual output power of the 30kw target power module group is reduced. Finally, the actual output power of the 20kw target power module group is increased to 10KW, the actual output power of the 30kw target power module group is reduced to 0KW, and the 30kw target power module group is turned off.

[0121] In one possible implementation, when the vehicle to be charged is in the process of trickle charging, the real-time power demand is small, and the energy storage device can be used to provide the real-time power demand of the vehicle to be charged or discharged without connecting the power module group. Specifically, the following methods can be used, but are not limited to:

[0122] When the real-time power demand of the vehicle to be charged or discharged is less than the trickle charging threshold, the target power module group is stopped from being allocated to the vehicle to be charged or discharged, and the energy storage device is allocated to the vehicle to be charged or discharged so that the energy storage device charges the vehicle to be charged or discharged. The trickle charging threshold is the maximum power for trickle charging of the vehicle to be charged or discharged.

[0123] In actual applications, when the real-time required power of the vehicle to be charged or discharged is less than the trickle charging threshold, the charging and discharging control unit connects the energy storage device to the vehicle to be charged or discharged, and reduces the actual output power of the target power module group connected to the vehicle to be charged or discharged, and increases the actual output power of the energy storage device, while ensuring that the sum of the actual output power of the energy storage device and the actual output power of the target power module group connected to the vehicle to be charged or discharged is equal to the real-time required power. When the actual output power of the target power module group connected to the vehicle to be charged or discharged drops to zero, the connection between the target power module group and the vehicle to be charged or discharged is cut off, and the vehicle to be charged or discharged is charged by outputting the real-time required power through the energy storage device.

[0124] Based on the above embodiments, the present application provides a charging and discharging system. Figure 7 As shown, the charging and discharging system 700 provided in the embodiment of the present application includes at least: multiple power module groups 710, multiple power switch units 720, multiple charging and discharging terminals 730, a first control switch S1 and a charging and discharging control unit;

[0125] The power grid is connected to the multiple power module groups 710 through the first control switch S1; each power switch unit 720 is connected to each power module group 710; each power switch unit 720 is connected to a corresponding charging and discharging terminal 730; the charging and discharging terminal 730 is connected to the vehicle to be charged or discharged; the charging and discharging control unit is respectively communicated with the multiple power module groups 710, the multiple power switch units 720, the multiple charging and discharging terminals 730, and the first control switch S1;

[0126] The charge and discharge control unit is used to adopt the power distribution method provided in the above embodiment to control the power switch unit 720 to connect the circuit connection between each power module group 710 and the charge and discharge terminal 730, so as to charge and discharge the vehicle to be charged and discharged connected to the charge and discharge terminal 730 in sequence through the power module group 710, the power switch unit 720 and the charge and discharge terminal 730.

[0127] In actual applications, each power module group 710 can be provided with multiple unidirectional power modules and / or bidirectional power modules with different rated output voltage ranges. When the multiple power modules included in the power module group 710 are all unidirectional power modules, the power module group 710 can only provide charging power for the vehicle to be charged or discharged; when the power module group 710 includes a unidirectional power module and at least one bidirectional power module, the power module group 710 can provide charging power or discharging power for the vehicle to be charged or discharged; when the multiple power modules included in the power module group 710 are all bidirectional power modules, the power module group 710 can provide charging power or discharging power for the vehicle to be charged or discharged. Each power switch unit 720 corresponds to a connection to each power module group 710 in the charging and discharging system 700, and the number of switches included in the power switch unit 720 is the same as the number of power module groups 710. Each switch in the power switch unit 720 is used to connect or disconnect the connection between the corresponding power module group 710 and the charging and discharging terminal 730. The power switch units 720 are arranged in a one-to-one correspondence with the charge and discharge terminals 730. The charge and discharge terminals 730 are used to connect to the vehicle to be charged or discharged and realize energy transmission. The first switch is used to connect or disconnect the external power grid and the charge and discharge system 700. The charge and discharge control unit is connected to the multiple power module groups 710, the multiple power switch units 720, the multiple charge and discharge terminals 730, and the first control switch S1 via the CAN bus. The charge and discharge control unit can realize information exchange with the power module groups 710 through the communication connection with the multiple power module groups 710 to obtain the rated charge and discharge power and corresponding rated output voltage range of each power module group 710. It can also realize the actual output power and whether each power module in the multiple power module groups 710 is working. The charge and discharge control unit can realize the control of the opening and closing of each switch in the power switch unit 720 through the communication connection with the multiple power switch units 720. The charge and discharge control unit can realize data exchange with the charge and discharge terminal 730 through the communication connection with the multiple discharge terminals to obtain the charge and discharge information of the vehicle to be charged or discharged. The charge and discharge control unit can control whether the charge and discharge system 700 is connected to the power grid through a communication connection with the first control switch S1.

[0128] In one possible implementation, see Figure 8 As shown, the charge and discharge system 700 may further include: an energy storage device 740 and a second control switch S2; the energy storage device 740 is connected to each power module group 710 through the second control switch S2; the charge and discharge control unit is in communication with the second control switch S2;

[0129] The energy storage device 740 is used to store energy input from the charging and discharging terminal 730 via the power module group 710 and the power switch unit 720; and is also used to output the stored energy to the charging and discharging terminal 730 via the power module group 710 and the power switch unit 720;

[0130] The second control switch S2 is used to connect or disconnect the energy storage cabinet from each power module group 710 under the control of the charge and discharge control unit.

[0131] In practical applications, the energy storage device 740 may be an energy storage cabinet. When the vehicle to be charged or discharged, connected to the charging and discharging terminal 730, is discharging, the second control switch S2 is turned on, so that the energy storage device 740 stores energy input through the charging and discharging terminal 730, the power switch unit 720, and the power module group 710. Under the control of the charging and discharging control unit, the energy stored in the energy storage device 740 can be transferred to the vehicle to be charged or discharged, connected to the charging and discharging terminal 730, via the power module group 710, the power switch unit 720, and the charging and discharging terminal 730, to charge the vehicle to be charged or discharged. The energy storage device 740 can serve as a backup power source, temporarily providing energy in the event of a power grid failure.

[0132] In one possible implementation, see Figure 9 As shown, the charge and discharge system 700 may further include: an energy storage device 740 and a first selection switch S3; a common contact of the first selection switch S3 is connected to each power module group 710, a first contact of the first selection switch S3 is connected to the power grid, and a second contact of the first selection switch S3 is connected to the energy storage device 740; a charge and discharge control unit is communicatively connected to the first selection switch S3;

[0133] The energy storage device 740 is used to store energy input from the charging and discharging terminal 730 via the power module group 710 and the power switch unit 720 , and is also used to output the stored energy to the charging and discharging terminal 730 via the power switch unit 720 ;

[0134] The first selection switch S3 is used to control the connection between the energy storage device 740 and each power switch unit when the real-time power demand of the vehicle to be charged or discharged is not less than the trickle charge threshold. When the real-time power demand of the vehicle to be charged or discharged is not less than the trickle charge threshold, the power module distribution device controls the connection between the power grid and each power module group 710.

[0135] In actual applications, the power switch unit 720 is equipped with not only switches K1-Kx corresponding to the power module groups 710, but also a switch Ks connected to the energy storage device 740. When the vehicle to be charged or discharged, connected to the charging and discharging terminal 730, is discharging, the first selector switch S3 is controlled to connect the energy storage device 740 to each power module group 710, so that the energy storage device 740 is configured to store energy input through the charging and discharging terminal 730, the power switch unit 720, and the power module group 710. When the real-time power demand of the vehicle to be charged or discharged is not less than the trickle charge threshold, the first selector switch S3 is controlled to maintain the connection between the energy storage device 740 and each power module group 710. When the real-time power demand of the vehicle to be charged or discharged is less than the trickle charging threshold, that is, when the vehicle to be charged or discharged connected to the charging and discharging terminal 730 is charged and enters trickle charging, the first selection switch S3 is controlled to connect the energy storage device 740 with each power switch unit, and the energy storage device 740 is controlled to output the stored energy to the vehicle to be charged or discharged through the power switch unit 720 and the charging and discharging terminal 730, so that the energy storage device 740 charges the vehicle to be charged or discharged, wherein the trickle charging threshold is the maximum power of the vehicle to be charged or discharged for trickle charging.

[0136] It should be noted that the principle of solving the technical problem of the charging and discharging system provided in the embodiment of the present application is similar to the power distribution method provided in the embodiment of the present application. Therefore, the implementation of the charging and discharging system provided in the embodiment of the present application can refer to the implementation of the power distribution method provided in the embodiment of the present application, and the repeated parts will not be repeated.

[0137] After introducing the power distribution method and device provided in the embodiments of the present application, the charge and discharge control unit provided in the embodiments of the present application is briefly introduced.

[0138] See Figure 10 As shown, the charge and discharge control unit 800 provided in the embodiment of the present application includes at least: a processor 801, a memory 802, and a computer program stored in the memory 802 and executable on the processor 801. When the processor 801 executes the computer program, the power allocation method provided in the embodiment of the present application is implemented.

[0139] It should be noted that Figure 10 The charging and discharging control unit 800 shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0140] The charge and discharge control unit 800 provided in the embodiment of the present application may further include a bus 803 connecting different components (including the processor 801 and the memory 802). The bus 803 represents one or more of several types of bus structures, including a memory bus, a peripheral bus, a local bus, and the like.

[0141] The memory 802 may include a readable medium in the form of a volatile memory, such as a random access memory (RAM) 8021 and / or a cache memory 8022 , and may further include a read-only memory (ROM) 8023 .

[0142] The memory 802 may also include a program tool 8025 having a set (at least one) of program modules 8024, including but not limited to: an operating subsystem, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0143] The charge and discharge control unit 800 can also communicate with one or more external devices 804 (such as a keyboard, a remote control, etc.), and can also communicate with one or more devices that enable a user to interact with the charge and discharge control unit 800 (such as a mobile phone, a computer, etc.), and / or communicate with any device that enables the charge and discharge control unit 800 to communicate with one or more other charge and discharge control units 800 (such as a router, a modem, etc.). Such communication can be carried out through the input / output (I / O) interface 805. In addition, the charge and discharge control unit 800 can also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN) and / or a public network, such as the Internet) through a network adapter 806. Figure 10 As shown, the network adapter 806 communicates with other modules of the charge and discharge control unit 800 via the bus 803. Figure 10 Not shown, other hardware and / or software modules may be used in conjunction with the charge and discharge control unit 800, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, disk arrays (Redundant Arrays of Independent Disks, RAID) subsystems, tape drives, and data backup storage subsystems.

[0144] The following describes the computer-readable storage medium provided in the embodiments of the present application. The computer-readable storage medium provided in the embodiments of the present application stores computer instructions, which, when executed by a processor, implement the power allocation method provided in the embodiments of the present application. Specifically, the computer instructions may be built into or installed in the charge-discharge control unit 800. Thus, the charge-discharge control unit 800 can implement the power allocation method provided in the embodiments of the present application by executing the built-in or installed computer instructions.

[0145] In addition, the power distribution method provided in the embodiment of the present application can also be implemented as a program product, which includes a program code. When the program product can be run on the charge and discharge control unit 800, the program code is used to enable the charge and discharge control unit 800 to execute the power distribution method provided in the embodiment of the present application.

[0146] The program product provided in the embodiments of the present application may adopt any combination of one or more readable media, wherein the readable medium may be a readable signal medium or a readable storage medium, and the readable storage medium may be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any combination of the above. Specifically, more specific examples of readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable disk, a hard disk, RAM, ROM, Erasable Programmable Read Only Memory (EPROM), optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0147] The program product provided in the embodiments of the present application may be a CD-ROM and include program code, and may also be run on a computing device. However, the program product provided in the embodiments of the present application is not limited thereto. In the embodiments of the present application, the readable storage medium may be any tangible medium containing or storing a program, and the program may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0148] It should be noted that although several units or subunits of the device are mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, depending on the embodiment of the application, the features and functions of two or more units described above can be embodied in a single unit. Conversely, the features and functions of a single unit described above can be further divided and embodied by multiple units.

[0149] Furthermore, although the operations of the method of the present application are described in a particular order in the accompanying drawings, this does not require or imply that the operations must be performed in this particular order, or that all illustrated operations must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0150] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0151] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include such modifications and variations.

Claims

1. A power distribution method, characterized in that: A charge and discharge control unit is applied to a charge and discharge system, wherein the charge and discharge system further comprises a plurality of power module groups, each power module group being composed of a plurality of unidirectional power modules and / or bidirectional power modules having different rated output voltage ranges. The method comprises: Obtaining the initial charge and discharge information of the vehicle to be charged and discharged, the rated charge and discharge power of each power module group, and the corresponding rated output voltage range; Determining a charge / discharge voltage level and an initial required power of the vehicle to be charged / discharged based on the initial charge / discharge information; allocating, in sequence, a target power module group that meets the initial required power to the vehicle to be charged or discharged based on the rated charge and discharge power and the rated output voltage range of each power module group, and allocating a plurality of unidirectional power modules and / or bidirectional power modules that meet the charge / discharge voltage level within the target power module group; During the charging and discharging process, obtaining real-time charging and discharging information of the vehicle to be charged and discharged, and determining the real-time required power of the vehicle to be charged and discharged based on the real-time charging and discharging information; Based on the real-time required power, adjusting the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group, or allocating a new target power module group to the vehicle to be charged or discharged based on the real-time required power; The step of adjusting the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group based on the real-time required power includes: When the real-time required power is less than or equal to the rated charge and discharge power of the target power module group, and the real-time required power is greater than the minimum charge and discharge power of the target power module group, adjusting the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group; wherein the minimum charge and discharge power is the minimum power among the rated charge and discharge powers of the multiple unidirectional power modules and / or bidirectional power modules in the target power module group; When the real-time required power is greater than the actual output power of the target power module group, obtaining the real-time charge / discharge voltage of the vehicle to be charged / discharged and the actual output current of the target power module group; determining the real-time required current according to the real-time charge / discharge voltage and the real-time required power; and when the difference between the real-time required current and the actual output current of the current power module group is greater than a current threshold, increasing the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group so that the actual output power of the target power module group meets the real-time required power; When the real-time required power is less than the actual output power of the target power module group, the number of unidirectional power modules and / or bidirectional power modules allocated in the target power module group is reduced so that the actual output power of the target power module group meets the real-time required power.

2. The power distribution method according to claim 1, wherein: Allocating a newly allocated target power module group to the vehicle to be charged or discharged based on the real-time required power includes: When the real-time required power is greater than the rated charge and discharge power of the target power module group, allocating a newly allocated target power module group to the vehicle to be charged or discharged; When the real-time required power is less than or equal to the minimum charge and discharge power of the target power module group, a newly allocated target power module group is allocated to the vehicle to be charged or discharged.

3. The power distribution method according to claim 2, wherein: When the real-time required power is greater than the rated charge and discharge power of the target power module group, allocating a new target power module group to the vehicle to be charged or discharged includes: When there is a power module group that meets the real-time power demand among the power module groups in the idle state, the power module group that meets the real-time power demand is used as the newly allocated target power module group, and the newly allocated target power module group replaces the target power module group allocated to the vehicle to be charged or discharged; When there is no power module group that meets the real-time power requirement among the power module groups in the idle state, based on the first power difference between the real-time power requirement and the actual output power of the allocated target power module group, a power module group that meets the first power difference is determined from the power module groups in the idle state as the newly allocated target power module group, and the newly allocated target power module group is allocated to the vehicle to be charged and discharged.

4. The power distribution method according to claim 2, wherein: When the real-time required power is less than the minimum charge and discharge power of the target power module group, allocating a new target power module group to the vehicle to be charged and discharged includes: From each power module group in an idle state, a power module group that meets the real-time power demand and has a rated charge and discharge power less than the allocated target power module group is determined as the newly allocated target power module group, and the newly allocated target power module group replaces the target power module group allocated to the vehicle to be charged and discharged.

5. The power distribution method according to claim 3, wherein: Replacing the target power module group already allocated to the vehicle to be charged or discharged with the newly allocated target power module group includes: Pre-charge the newly allocated target power module group; When the pre-charging process is completed, connecting the newly allocated target power module group to the vehicle to be charged or discharged; Under the premise of ensuring that the sum of the actual output power of the newly allocated target power module group and the actual output power of the already allocated target power module group is equal to the real-time required power, reduce the actual output power of the already allocated target power module group and increase the actual output power of the newly allocated target power module group; When the actual output power of the allocated target power module group decreases to the average output power, the connection between the allocated target power module group and the vehicle to be charged or discharged is cut off; wherein the average output power is the ratio of the real-time required power to the total number of the newly allocated target power module group and the allocated target power module groups; Increase the actual output power of the newly allocated target power module group to the real-time required power.

6. The power distribution method according to claim 3, wherein: Allocating the newly allocated target power module group to the vehicle to be charged or discharged includes: Pre-charge the newly allocated target power module group; After the pre-charging process is completed, connecting the newly allocated target power module group to the vehicle to be charged or discharged; The actual output power of the newly allocated target power module group and the allocated target power module group is adjusted to the average output power; wherein the average output power is the ratio of the real-time required power to the total number of the newly allocated target power module group and the allocated target power module group.

7. The power distribution method according to claim 1, wherein: Also includes: When there are multiple target power module groups allocated to the vehicle to be charged or discharged, and a first number of target power module groups among the multiple target power module groups have a total rated power greater than or equal to the real-time required power, stopping allocating a second number of target power module groups to the vehicle to be charged or discharged; The total rated power is the sum of the rated powers of multiple target power module groups, and the sum of the first number and the second number is the total number of target power module groups allocated to the vehicle to be charged or discharged.

8. The power distribution method according to claim 1, wherein: Also includes: When the real-time power demand of the vehicle to be charged or discharged is less than a trickle charging threshold, the target power module group is stopped from being allocated to the vehicle to be charged or discharged, and the energy storage device is allocated to the vehicle to be charged or discharged so that the energy storage device charges the vehicle to be charged or discharged, wherein the trickle charging threshold is the maximum power for trickle charging of the vehicle to be charged or discharged.

9. A charging and discharging system, characterized in that: include: Multiple power module groups, multiple power switch units, multiple charge and discharge terminals, a first control switch and a charge and discharge control unit; The power grid is connected to the plurality of power module groups respectively through the first control switch; each of the power switch units is connected to each power module group; each power switch unit is connected to a corresponding charging and discharging terminal; the charging and discharging terminal is connected to the vehicle to be charged and discharged; the charging and discharging control unit is communicatively connected to the plurality of power module groups, the plurality of power switch units, the plurality of charging and discharging terminals, and the first control switch respectively; The charge and discharge control unit is used to adopt the power distribution method as described in any one of claims 1 to 8 to control the power switch unit to connect the circuit connection between each power module group and the charge and discharge terminal, so as to charge and discharge the vehicle to be charged and discharged connected to the charge and discharge terminal in sequence through the power module group, the power switch unit and the charge and discharge terminal.

10. The charge and discharge system according to claim 9, wherein: Also includes: An energy storage device and a second control switch; the energy storage device is connected to each power module group respectively through the second control switch; the charge and discharge control unit is communicatively connected to the second control switch; The energy storage device is used to store the energy input to the charging and discharging terminal through the power module group and the power switch unit; and is also used to output the stored energy to the charging and discharging terminal through the power module group and the power switch unit; The second control switch is used to connect or disconnect the energy storage cabinet from each power module group under the control of the charge and discharge control unit.

11. The charge-discharge system according to claim 9, wherein: Also includes: An energy storage device and a first selection switch; a common contact of the first selection switch is connected to each power module group, a first contact of the first selection switch is connected to the power grid, and a second contact of the first selection switch is connected to the energy storage device; the charge and discharge control unit is in communication with the first selection switch; The energy storage device is used to store energy input from the charging and discharging terminal via the power module group and the power switch unit, and is also used to output the stored energy to the charging and discharging terminal via the power switch unit; The first selection switch is used to control the connection between the energy storage device and each power switch unit when the real-time power demand of the vehicle to be charged or discharged is less than the trickle charging threshold. When the real-time power demand of the vehicle to be charged or discharged is not less than the trickle charging threshold, the power module distribution device controls the connection between the power grid and each power module group.

12. A charge and discharge control unit, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the power allocation method according to any one of claims 1 to 8 when executing the computer program.

13. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the power distribution method according to any one of claims 1 to 8 is implemented.

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