Liquid Cooling Charging Stack Power Dynamic Deployment Method, Device, Terminal and Storage Medium

Abstract

The present invention relates to a method, device, terminal and storage medium for dynamically allocating the power of a liquid-cooled charging pile, belonging to the field of charging technology. The method includes: the main control board receives the charging demand power of an electric vehicle connected to a corresponding charging terminal and sends a start command to the power board; the power board allocates the charging modules connected to the corresponding charging terminal to the main control board; the power board calculates the allocated power and the demand power, and allocates the idle charging modules according to the relationship between the allocated power and the demand power until the demand power is less than or equal to the allocated power; it is determined again whether the demand power is less than the sum of the power of a single group of charging modules and the preset buffer power. If so, a group of allocated charging modules is exited. If not, no action is taken. The present invention can flexibly and dynamically allocate the power, flexibly meet the charging needs of different vehicles, and save resources and costs.

Description

Technical Field

[0001] The present invention relates to a method, device, terminal and storage medium for dynamically allocating the power of a liquid-cooled charging pile, and belongs to the field of charging technology. Background Art

[0002] With the rapid development of new energy vehicles, the popularity rate of electric vehicles (EVs) has increased significantly, and the demand for efficient and fast charging technologies has become increasingly urgent. As the core equipment for shortening the charging time, high-power charging piles have gradually become the mainstream of the industry. However, during the high-power charging process, the generated heat increases sharply. The traditional air-cooled heat dissipation method is limited by problems such as low heat dissipation efficiency, high noise, and poor environmental adaptability, and it is difficult to meet the long-term stable operation requirements of high-power charging piles. In this context, the liquid-cooled heat dissipation technology, with its advantages of high heat conduction efficiency, low energy consumption, and compact structure, has been widely applied to the new generation of charging devices and has become the key solution to solve the high-power heat dissipation problem.

[0003] However, traditional liquid-cooled charging piles mostly adopt a fixed power distribution strategy or a deployment method based on simple priority rules, and cannot respond in real time to the dynamic demand changes of multiple charging terminals.

[0004] Therefore, the Chinese patent with the patent publication number CN106033904B proposes a matrix-type flexible charging pile and a charging method for dynamically allocating power, which realizes dynamic power distribution by setting up a fixed power area and a dynamic power area, and improves the conversion efficiency and utilization rate of charging devices; the Chinese patent with the patent publication number CN109774530B further proposes a charging pile and its intelligent power allocation method on the basis of the above patent, reducing the number of DC contactors used, saving costs, and simplifying the control logic.

[0005] However, when the above methods receive charging demands for dynamic power allocation, the allocation methods are relatively single and inflexible, resulting in resource waste, being unable to flexibly meet the charging demands of different vehicles, and the above methods will cause frequent switching of relays and relatively high equipment loss costs. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a method, device, terminal and storage medium for dynamically allocating the power of a liquid-cooled charging pile, which flexibly and dynamically allocates power, flexibly meets the charging demands of different vehicles, and saves resources and costs.

[0007] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0008] In a first aspect, the present invention provides a method for dynamically allocating the power of a liquid-cooled charging pile. The liquid-cooled charging pile includes a plurality of charging terminals, and the charging terminals include liquid-cooled charging terminals and fast-charging terminals. Each charging terminal is correspondingly connected to a set of charging modules through a relay, and adjacent charging modules are electrically connected through a relay. A bridging relay is provided between the liquid-cooled charging terminal and the charging terminal adjacent to it. The power dynamic allocation method includes:

[0009] The main control board receives the charging demand power of the electric vehicle connected to the corresponding charging terminal and sends a start command to the power board.

[0010] The power board allocates the charging modules correspondingly connected to the charging terminal to the main control board.

[0011] The power board calculates the allocated power and the demand power, and allocates the idle charging modules according to the relationship between the allocated power and the demand power until the demand power is less than or equal to the allocated power.

[0012] Judge again whether the demand power is less than the sum of the power of a single set of charging modules and the preset buffer power. If so, withdraw a set of allocated charging modules. If not, do nothing.

[0013] In combination with the first aspect, optionally, the power board allocating the charging modules correspondingly connected to the charging terminal to the main control board includes: the power board judges whether the charging modules correspondingly connected to the charging terminal are in an allocable state. If they are in an allocable state, directly allocate the charging modules to the main control board. If they are in a non-allocable state, withdraw the charging modules and then allocate them to the main control board.

[0014] In combination with the first aspect, optionally, the power board calculates the allocated power and the demand power, and allocates the idle charging modules according to the relationship between the allocated power and the demand power until the demand power is less than or equal to the allocated power, including:

[0015] S31. Judge whether the demand power is greater than the allocated power. If so, execute step S32.

[0016] S32. Ask whether the nth group of charging modules is idle and allocable. If so, execute step S33. If not, execute n=n+1 and then re-execute step S32 until all charging modules are asked.

[0017] S33. Allocate the group of charging modules to the main control board, recalculate the allocated power, and return to step S31.

[0018] In combination with the first aspect, optionally, when the demand power is still greater than the allocated power after all idle and allocable charging modules are allocated to the main control board, the steps further include:

[0019] S51. Determine whether the result of subtracting the preset buffer power from the required power is still greater than the allocated power. If so, execute step S52; if not, do nothing.

[0020] S52. Query whether the nth group of charging modules is available for allocation. If so, execute step S53; if not, execute n=n+1 and then re-execute step S52 until all charging modules have been queried.

[0021] S53. Remove this group of charging modules so that the status of this group of charging modules is available for allocation, allocate this group of charging modules to this main control board, recalculate the allocated power, and return to step S31.

[0022] Optionally, in combination with the first aspect, the method for judging the status of the charging module is as follows:

[0023] Each group of charging modules is provided with an allocatable flag and an allocated gun number flag.

[0024] Judge the status of the allocatable flag and the allocated gun number flag.

[0025] When the allocatable flag = 0 and the allocated gun number flag = 0, it indicates an available for allocation status.

[0026] When the allocatable flag = 0 and the allocated gun number flag = 1, it indicates a non-available but allocatable status.

[0027] When the allocatable flag = 1 and the allocated gun number flag = 1, it indicates a non-available and non-allocatable status.

[0028] Optionally, in combination with the first aspect, when the power board calculates the allocated power and the required power and allocates the idle charging modules according to the relationship between the allocated power and the required power until the required power is less than or equal to the allocated power, it further includes:

[0029] S61. Set the priority of the charging terminal with changed requirements to 1.

[0030] S62. After the power board receives the charging requirement of the main control board, check whether there is a charging terminal with a priority of 1. If so, execute step S63; if not, execute step S64 after normal polling.

[0031] S63. Prioritize issuing commands to the charging module corresponding to this charging terminal and clear the priority of this charging terminal.

[0032] S64. The power board queries the latest status information of the charging module and feeds it back to the charging terminal.

[0033] Optionally, in combination with the first aspect, when it is in a non-allocatable status, removing this charging module and then allocating it to this main control board includes:

[0034] Stop the output of the charging module until the output voltage of the charging module is less than a preset threshold voltage, then disconnect the relay, and clear the allocation relationship of the charging module.

[0035] In a second aspect, the present invention provides a liquid-cooled charging pile power dynamic allocation device, and the device includes:

[0036] The first module: used for the main control board to receive the charging demand power of the electric vehicle connected to the corresponding charging terminal, and send a start command to the power board;

[0037] The second module: used for the power board to allocate the charging module corresponding to the connection of the charging terminal to the main control board;

[0038] The third module: used for the power board to calculate the allocated power and the demand power, and allocate the idle charging modules according to the relationship between the allocated power and the demand power until the demand power is less than or equal to the allocated power;

[0039] The fourth module: used to judge again whether the demand power is less than the sum of the power of a single group of charging modules and the preset buffer power. If so, exit a group of allocated charging modules. If not, do nothing.

[0040] In a third aspect, the present invention provides an electronic terminal, including a processor and a memory connected to the processor. A computer program is stored in the memory. When the computer program is executed by the processor, the steps of the method described in any one of the first aspect are executed.

[0041] In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored. The program is characterized in that when the program is executed by a processor, the steps of the method described in any one of the first aspect are realized.

[0042] Compared with the prior art, the beneficial effects achieved by the present invention:

[0043] 1) The present invention sets a preset buffer. When continuously allocating charging modules until the required power is less than the allocated power, it is determined again whether the required power is less than the sum of the power of a single group of charging modules and the power of the preset buffer. If so, one group of the allocated charging modules is exited. This solution can maximize the available charging modules while maximizing the charging requirements of the vehicle, flexibly meet different vehicles, and reduce the waste of charging module resources. Setting the preset buffer can also reduce the frequent switching of relays and reduce the equipment loss of relays. When the required power fluctuates around the power step of a single group of charging modules, the required power and the allocated power at the vehicle output end and the power distribution end of the main control board are prone to frequent cut-in and cut-out situations, which will cause frequent relay actions. Setting the preset buffer can, in this case, adjust the power in the preset buffer first to avoid direct frequent relay actions, thereby effectively extending the service life of the relay. When the power change exceeds the size of the preset buffer, the charging module is cut out.

[0044] 2) An allocable flag and an allocated gun number flag are set for each group of charging modules. By combining the allocable flag and the allocated gun number flag, different states of the charging modules are judged. In this way, the allocation logic for allocating charging modules to the liquid-cooled charging terminal and the fast-charging terminal can be simplified, and the allocation of charging modules can be further flexibly controlled. Description of the Drawings

[0045] Figure 1 is a schematic structural diagram of the liquid-cooled charging stack in Embodiment 1 of the present invention;

[0046] Figure 2 is a step diagram of the present invention;

[0047] Figure 3 is a flowchart of the dynamic allocation method in the embodiment of the present invention;

[0048] Figure 4 is a flowchart for optimizing module commands in the embodiment of the present invention;

[0049] Figure 5 is an internal structural diagram of the electronic terminal in Embodiment 3 of the present invention. Detailed Embodiment

[0050] The technical solution of the present invention will be described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present application and the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations on the technical solution of the present application. Without conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0051] In the description of the present invention, if "first" and "second" are described, they are only used for the purpose of distinguishing technical features, and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0052] In the description of the present invention, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0053] Embodiment 1:

[0054] This Embodiment 1 provides a method for dynamically allocating the power of a liquid-cooled charging pile. This method can be applied to a terminal and can be executed by a liquid-cooled charging pile device. This device can be implemented in a software and / or hardware manner and can be integrated into the terminal.

[0055] This Embodiment 1 discloses a method for dynamically allocating the power of a liquid-cooled charging pile. As Figure 1 shown, the liquid-cooled charging pile includes a plurality of charging terminals. The charging terminals include liquid-cooled charging terminals and fast-charging terminals. Each charging terminal is correspondingly connected to a group of charging modules through a relay. Adjacent charging modules are electrically connected through a relay. A bridging relay is provided between the liquid-cooled charging terminal and the charging terminal adjacent to it. In some embodiments, the bridging relay may not be provided between the liquid-cooled charging terminal and the charging terminal adjacent to it. In this way, the liquid-cooled charging terminal can only allocate the charging terminals adjacent to its left and right, and the power that can be called is limited. However, this method has a smaller cabinet occupancy area and lower cost, and can be selected according to actual needs, and will not be limited too much here.

[0056] In one embodiment, as Figure 1 shown, the liquid-cooled charging pile includes six charging terminals. The fourth charging terminal is set as the liquid-cooled charging terminal, and the others are fast-charging terminals. Their charging modules are 60kw, 60kw, 80kw, 80kw, 80kw, and 60kw respectively. The above content can be adjusted according to the specific implementation situation and will not be limited too much here.

[0057] In another embodiment, the liquid-cooled charging pile includes seven charging terminals. The seventh charging terminal is set as the liquid-cooled charging terminal, and its charging module is specifically set as above and can be adjusted according to the implementation situation, and will not be limited too much here.

[0058] As Figure 2-3 shown, the power dynamic allocation method includes:

[0059] Step 1: The main control board receives the charging demand power of the electric vehicle connected to the corresponding charging terminal and sends a start command to the power board;

[0060] Step 2: The power board receives the start command and allocates the charging modules corresponding to the connection of this charging terminal to this main control board;

[0061] The specific process is as follows: The power board determines whether the charging module corresponding to the connection of this charging terminal is in an allocable state. If it is in an allocable state, it directly allocates this charging module to this main control board; if it is in a non-allocable state, this charging module is allocated to this main control board after exiting. The specific process is as follows: Stop the output of this charging module until the output voltage of this charging module is less than the preset threshold voltage, then disconnect the relay. In a specific embodiment, the preset threshold voltage is 60V, and the allocation relationship of this charging module is cleared.

[0062] Step 3: The power board calculates the allocated power and the demand power, and allocates the idle charging modules according to the relationship between the allocated power and the demand power until the demand power is less than or equal to the allocated power;

[0063] The specific steps include:

[0064] S31. Determine whether the demand power is greater than the allocated power. If so, execute step S32;

[0065] S32. Ask whether the nth group of charging modules is idle and allocable. If so, execute step S33. If not, execute n = n + 1 and then re-execute step S32 until all charging modules have been asked;

[0066] S33. Allocate this group of charging modules to this main control board, recalculate the allocated power, and return to step S31.

[0067] In some embodiments, if after all idle and allocable charging modules are allocated to this main control board, the demand power is still greater than the allocated power, then in addition to the above steps, it further includes:

[0068] S51. Determine whether the result of subtracting the preset buffer power from the demand power is still greater than the allocated power. If so, execute step S52. If not, do nothing;

[0069] S52. Ask whether the nth group of charging modules is non-idle and allocable. If so, execute step S53. If not, execute n = n + 1 and then re-execute step S52 until all charging modules have been asked;

[0070] S53. Exit the charging module group to make the status of the charging module group idle and allocable, allocate the charging module group to the main control board, recalculate the allocated power, and return to step S31.

[0071] Steps S51 - S53 are not shown in Figure 3 the figure.

[0072] In some embodiments, to further improve the system response speed during the process of step two, as Figure 4 shown, optimize the module commands, which saves the overall cycle time and improves the response speed compared to the polling command; the specific process is as follows:

[0073] S61. Set the priority of the charging terminal with changed requirements to 1;

[0074] Judge whether the required power of each charging terminal has changed in sequence for multiple charging terminals, specifically including: output voltage, output current, and switch command. If it has changed, set the priority of this charging terminal to 1;

[0075] S62. After the power board receives the charging requirements from the main control board, check whether there is a charging terminal with a priority of 1. If so, execute step S63; if not, execute step S64 after normal polling;

[0076] S63. Prioritize sending commands to the charging module corresponding to this charging terminal and clear the priority of this charging terminal;

[0077] S64. The power board queries the latest status information of the charging module and feeds it back to the charging terminal.

[0078] In this embodiment, the setting of the charging terminal priority is the setting of the command sending priority, which is used to improve the response speed. It has an essential difference from the setting of the priority between the liquid - cooled charging terminal and the fast - charging terminal proposed in other embodiments in terms of the starting reason and the final effect, and they are two different settings.

[0079] Step Four: Judge again whether the required power is less than the sum of the power of a single - group charging module and the preset buffer power. If so, exit a group of allocated charging modules; if not, do nothing.

[0080] In some embodiments, the power size of the preset buffer is set according to the percentage of the power of a single - group charging module. The specific percentage can be set according to the actual situation of the charging stack and will not be limited too much here.

[0081] In this embodiment, the method for judging the status of the charging module is:

[0082] Each group of charging modules is provided with an allocable flag and an allocated gun number flag;

[0083] Judge the allocatable flag and the allocated gun number flag status;

[0084] When the allocatable flag = 0 and the allocated gun number flag = 0, it indicates an idle and allocatable state;

[0085] When the allocatable flag = 0 and the allocated gun number flag = 1, it indicates a non-idle and allocatable state;

[0086] When the allocatable flag = 1 and the allocated gun number flag = 1, it indicates a non-idle and non-allocatable state.

[0087] In some embodiments, the allocatable flag and the allocated gun number flag status are set according to the requirements of the liquid-cooled charging terminal and the fast-charging terminal. For example: when the priorities of the liquid-cooled charging terminal and the fast-charging terminal are the same, when a certain charging module is called by the fast-charging terminal, its allocatable flag = 1 and the allocated gun number flag = 1, then this charging module cannot be called by the liquid-cooled charging terminal; when the priority of the liquid-cooled charging terminal is higher than that of the fast-charging terminal, when a certain charging module is called by the fast-charging terminal, its allocatable flag = 0 and the allocated gun number flag = 1, which means that although this charging module has been called by the fast-charging terminal at this time, when the liquid-cooled charging terminal needs to call it, it can still be withdrawn and then called by the liquid-cooled charging terminal; similarly, when the priority of the liquid-cooled charging terminal is higher than that of the fast-charging terminal, when a certain charging module is called by the liquid-cooled charging terminal, at this time its allocatable flag = 1 and the allocated gun number flag = 1, this charging module cannot be called by other charging terminals.

[0088] In another embodiment, an allocatable flag of 0 indicates that the charging module is in an idle state, and an allocatable flag of 1 indicates that the charging module is in a non-idle state. The allocated gun number flag corresponds to the charging terminal one by one. For example, if this charging module is occupied by the mth charging terminal, then the allocated gun number flag is m at this time; in this embodiment, a corresponding delay is set between the variables of 0 and 1 for the allocatable flag as needed to ensure that the output relay is disconnected and prevent a series connection situation from occurring between the charging terminals.

[0089] Embodiment 2:

[0090] The present invention provides a liquid-cooled charging stack power dynamic allocation device, and the device includes:

[0091] The first module: used for the main control board to receive the charging demand power of the electric vehicle connected to the corresponding charging terminal and send a start command to the power board;

[0092] The second module: used for the power board to allocate the charging module corresponding to the charging terminal to the main control board;

[0093] The third module: used to calculate the allocated power and the required power for the power board, and allocate the idle charging modules according to the relationship between the allocated power and the required power until the required power is less than or equal to the allocated power;

[0094] The fourth module: used to determine again whether the required power is less than the sum of the power of a single group of charging modules and the preset buffer power. If so, a group of allocated charging modules is exited; if not, no action is taken.

[0095] The liquid-cooled charging pile power dynamic allocation device provided by the embodiments of the present invention can execute the liquid-cooled charging pile power dynamic allocation method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

[0096] Embodiment 3:

[0097] The embodiments of the present invention also provide an electronic terminal, which can be a server, and its internal structure diagram can be as Figure 5 shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the electronic terminal is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store the data obtained and generated in the liquid-cooled charging pile power dynamic allocation method. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the electronic terminal is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, it realizes the liquid-cooled charging pile power dynamic allocation method in the foregoing Embodiment 1.

[0098] Those skilled in the art can understand that Figure 5 the structure shown in

[0099] is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific electronic terminal may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0100] Embodiment 4:

[0101] An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the method steps described in Embodiment 1 are implemented.

[0102] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0103] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0104] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0105] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0106] The above description is only a preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A method for dynamically adjusting power of a liquid-cooled charging stack, characterized in that: The liquid-cooled charging stack includes a plurality of charging terminals, including a liquid-cooled charging terminal and a fast-charging charging terminal. Each of the charging terminals is connected to a group of charging modules via a relay. Adjacent charging modules are electrically connected via relays. A bridge relay is provided between the liquid-cooled charging terminal and the next adjacent charging terminal. The power dynamic allocation method includes: The main control board receives the charging power demand of the electric vehicle connected to the corresponding charging terminal, and sends a start command to the power board; The power board allocates the charging module corresponding to the charging terminal to the main control board; The power board calculates the allocated power and the required power, and allocates idle charging modules according to the relationship between the allocated power and the required power until the required power is less than or equal to the allocated power, including: S31. Determine whether the required power is greater than the allocated power. If so, execute step S32; S32. Inquire whether the nth group of charging modules is free and can be allocated. If yes, execute step S33. If not, execute n=n+1 and then re-execute step S32 until all charging modules have been inquired; S33. Assign the group of charging modules to the main control board, recalculate the allocated power, and return to step S31; When all idle and assignable charging modules are assigned to the main control board, the required power is still greater than the assigned power, the steps further include: S51. Determine whether the result of subtracting the preset buffer power from the required power is still greater than the allocated power. If so, execute step S52; if not, do nothing; S52. Inquire whether the nth group of charging modules is non-idle and can be allocated. If yes, execute step S53. If not, execute n=n+1 and then re-execute step S52 until all charging modules have been inquired. S53. Exit the group of charging modules, so that the group of charging modules is in the idle state and can be allocated, allocate the group of charging modules to the main control board, and recalculate the allocated power, and return to step S31; It is determined again whether the required power is less than the sum of the power of a single group of charging modules and the preset buffer zone. If so, a group of allocated charging modules is exited; if not, no action is taken.

2. The method for dynamic power allocation of a liquid-cooled charging stack according to claim 1, characterized in that: The power board assigns the charging module corresponding to the charging terminal to the main control board, including: the power board determines whether the charging module corresponding to the charging terminal is in an assignable state, and if so, directly assigns the charging module to the main control board; if not, withdraws the charging module and then assigns it to the main control board.

3. The method for dynamic power allocation of a liquid-cooled charging stack according to any one of claims 1 to 2, characterized in that: The method to determine the status of the charging module is: Each group of charging modules is provided with an assignable mark and an assigned gun number mark; Determine the status of the assignable mark and the assigned gun number mark; When the allocatable flag = 0 and the assigned gun number flag = 0, it indicates an idle allocatable state; When the allocatable flag = 0 and the assigned gun number flag = 1, it indicates a non-idle allocatable state; When the allocatable flag = 1 and the allocated gun number flag = 1, it indicates a non-idle and non-allocatable state.

4. The method for dynamic power allocation of a liquid-cooled charging stack according to claim 1, characterized in that: The power board calculates the allocated power and the required power, and allocates the idle charging modules according to the relationship between the allocated power and the required power until the required power is less than or equal to the allocated power, further comprising: S61. Set the priority of the charging terminal with changed demand to 1; S62. After the power board receives the charging demand from the main control board, it checks whether there is a charging terminal with a priority of 1. If yes, it executes step S63. If not, it executes step S64 after normal polling; S63. Give priority to issuing commands to the charging module corresponding to the charging terminal, and clear the priority of the charging terminal; S64. The power board queries the latest status information of the charging module and feeds it back to the charging terminal.

5. The method for dynamic power allocation of a liquid-cooled charging stack according to claim 2, characterized in that: If the state is not assignable, then assigning the charging module to the main control board after exiting the charging module comprises: The output of the charging module is stopped until the output voltage of the charging module is less than a preset threshold voltage, the relay is disconnected, and the allocation relationship of the charging module is cleared.

6. A liquid-cooled charging stack power dynamic allocation device, characterized in that: The device comprises: The first module: used for the main control board to receive the charging power demand of the electric vehicle connected to the corresponding charging terminal, and send a start command to the power board; The second module is used for the power board to allocate the charging module corresponding to the charging terminal to the main control board; The third module: is used for the power board to calculate the allocated power and the required power, and to allocate the idle charging modules according to the relationship between the allocated power and the required power until the required power is less than or equal to the allocated power; The fourth module is used to determine again whether the required power is less than the sum of the power of a single group of charging modules and the preset buffer zone. If so, a group of allocated charging modules is exited; if not, no action is taken.

7. An electronic terminal, characterized in that: The method comprises a processor and a memory connected to the processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 5 are executed.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method described in any one of claims 1 to 5 are implemented.

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