Dynamic power allocation method and device for liquid cooling charging pile, terminal and storage medium

Abstract

The invention relates to a liquid cooling charging pile power dynamic allocation method and device, a terminal and a storage medium, and belongs to the technical field of charging, and the method comprises the steps that a main control board receives the charging demand power of an electric vehicle connected with a corresponding charging terminal, and issues a starting command to a power board; the power board distributes a charging module correspondingly connected with the charging terminal to the main control board; the power board calculates allocated power and demanded power, and allocates the idle charging modules according to the relationship between the allocated power and the demanded power until the demanded power is smaller than or equal to the allocated power; re-judging whether the required power is smaller than the sum of the power of the single group of charging modules and the power of the preset buffer area, if so, quitting a group of distributed charging modules, and if not, not acting; the power can be flexibly and dynamically allocated, the charging requirements of different vehicles are flexibly met, and resources and cost are saved.

Description

Technical Field

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

[0002] With the rapid development of new energy vehicles, the penetration rate of electric vehicles (EVs) has increased significantly, and the demand for efficient and fast charging technology has become increasingly urgent. As the core equipment for shortening charging time, high-power charging piles have gradually become the mainstream of the industry. However, the heat generated during high-power charging increases sharply. Traditional air-cooling heat dissipation methods are limited by low heat dissipation efficiency, high noise, poor environmental adaptability and other problems, and it is difficult to meet the long-term stable operation requirements of high-power charging piles. In this context, liquid cooling technology has been widely used in the new generation of charging equipment due to its advantages of high thermal conductivity efficiency, low energy consumption and compact structure, and has become a key solution to the problem of high-power heat dissipation.

[0003] However, traditional liquid-cooled charging stacks mostly adopt fixed power allocation strategies or deployment methods based on simple priority rules, which cannot respond to the dynamic demand changes of multiple charging terminals in real time.

[0004] Therefore, the Chinese patent with patent publication number CN106033904B proposes a matrix-type flexible charging stack and a charging method for dynamically allocating power, which realizes dynamic power allocation by establishing fixed power zones and dynamic power zones, thereby improving the conversion efficiency and utilization rate of charging equipment; the Chinese patent with patent publication number CN109774530B further proposes a charging stack and its intelligent power allocation method based on the above patents, which reduces the number of DC contactors used, saves costs, and simplifies the control logic.

[0005] However, when the above method receives charging demand and dynamically allocates power, the allocation method is relatively single and rigid, there is a waste of resources, and it cannot flexibly meet the charging needs of different vehicles. In addition, the above method will cause the switching relay to operate frequently and the equipment loss cost is high. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a method, device, terminal and storage medium for dynamic power allocation of a liquid-cooled charging stack, so as to flexibly and dynamically allocate power, flexibly meet the charging needs of different vehicles, and save resources and costs.

[0007] To achieve the above object, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides a method for dynamic power allocation of a liquid-cooled charging stack, wherein the liquid-cooled charging stack includes a plurality of charging terminals, wherein the charging terminals include a liquid-cooled charging terminal and a fast-charging charging terminal, wherein each charging terminal is connected to a group of charging modules via a relay, and adjacent charging modules are electrically connected via a relay, and a bridging relay is provided between the liquid-cooled charging terminal and the next adjacent charging terminal; the method for dynamic power allocation 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 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 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.

[0008] In combination with the first aspect, optionally, 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 it is in an assignable state, directly assigns the charging module to the main control board; if it is in an unassignable state, withdraws the charging module and then assigns it to the main control board.

[0009] In combination with the first aspect, optionally, 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, 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. Allocate the group of charging modules to the main control board, recalculate the allocated power, and return to step S31.

[0010] In combination with the first aspect, optionally, when all idle allocatable charging modules are allocated to the main control board, the required power is still greater than the allocated power, then 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 status of the group of charging modules is idle and can be allocated, allocate the group of charging modules to the main control board, recalculate the allocated power, and return to step S31.

[0011] In combination with the first aspect, optionally, a method for determining the state 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.

[0012] In combination with the first aspect, optionally, 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.

[0013] In combination with the first aspect, optionally, if the state is not assignable, assigning the charging module to the main control board after exiting the charging module includes: 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.

[0014] In a second aspect, the present invention provides a device for dynamically adjusting power of a liquid-cooled charging stack, the device comprising: 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.

[0015] In a third aspect, the present invention provides an electronic terminal, comprising 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 described in any one of the first aspects are performed.

[0016] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the steps of the method as described in any one of the first aspects.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1) The present invention sets a preset buffer. When the charging modules are continuously allocated 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 preset buffer. If so, a group of allocated charging modules is withdrawn. This solution can maximize the satisfaction of the vehicle's charging needs while freeing up the allocable charging modules to the greatest extent, flexibly meet the needs of different vehicles, and reduce the waste of resources of the charging modules; setting a 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 vehicle output end and the main control board power distribution end are prone to frequent switching in and out of the required and allocated power, which will cause the relay to operate frequently. Setting a preset buffer can make the power adjustment in the preset buffer first in this case to avoid the relay from operating frequently directly, thereby effectively extending the service life of the relay. When the power change exceeds the preset buffer size, the charging module is switched out.

[0018] 2) An allocable flag and an allocated gun number flag are set in each group of charging modules. The different states of the charging modules are judged by the combination of the allocable flag and the allocated gun number flag. This method can simplify the allocation logic when allocating charging modules to liquid-cooled charging terminals and fast-charging charging terminals, and further flexibly control the allocation of charging modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the liquid-cooled charging stack in the first embodiment of the present invention; Figure 2 It is a step diagram of the present invention; Figure 3 is a flow chart of a dynamic allocation method according to an embodiment of the present invention; Figure 4 is a flowchart of module command optimization in an embodiment of the present invention; Figure 5 It is a diagram of the internal structure of the electronic terminal in Example 3 of the present invention. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations on the technical solution of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.

[0021] In the description of the present invention, if “first” or “second” is described, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0023] Embodiment 1:

[0024] The first embodiment of the present invention provides a method for dynamically adjusting the power of a liquid-cooled charging stack. The method can be applied to a terminal and can be executed by a liquid-cooled charging stack device. The device can be implemented by software and / or hardware, and the device can be integrated in the terminal.

[0025] This embodiment 1 discloses a method for dynamically adjusting the power of a liquid-cooled charging stack. Figure 1As shown, the liquid-cooled charging stack includes multiple charging terminals, and the charging terminals include liquid-cooled charging terminals and fast-charging charging terminals. Each charging terminal is connected to a group of charging modules via a relay, and adjacent charging modules are electrically connected via relays. A bridging relay is provided between the liquid-cooled charging terminal and the next adjacent charging terminal. In some embodiments, a bridging relay may not be provided between the liquid-cooled charging terminal and the next adjacent charging terminal. In this way, the liquid-cooled charging terminal can only coordinate the charging terminals adjacent to the left and right, and the power calling is limited. However, this way occupies a smaller cabinet area and has a lower cost. It can be selected according to actual needs and is not subject to too many restrictions.

[0026] In one embodiment, Figure 1 As shown, the liquid-cooled charging stack includes six charging terminals, the fourth charging terminal is set as a liquid-cooled charging terminal, and the others are fast-charging terminals, and their charging modules are 60kw, 60kw, 80kw, 80kw, 80kw, and 60kw respectively; the above contents can be adjusted according to the specific implementation situation, and no excessive restrictions are made here.

[0027] In another embodiment, the liquid-cooled charging stack includes seven charging terminals, and the seventh charging terminal is set as a liquid-cooled charging terminal. The specific setting of its charging module can be adjusted according to the implementation situation as described above, and no excessive restrictions are made here.

[0028] like Figure 2-3 As shown, the power dynamic allocation method includes: Step 1: The main control board receives the charging power requirement of the electric vehicle connected to the corresponding charging terminal, and sends a start command to the power board; Step 2: The power board receives the start command and assigns the charging module connected to the charging terminal to the main control board; The specific process is: the power board determines whether the charging module corresponding to the charging terminal is in an assignable state. If it is in an assignable state, the charging module is directly assigned to the main control board; if it is in an unassignable state, the charging module is assigned to the main control board after exiting. The specific process is: stop the output of the charging module until the output voltage of the charging module is less than the preset threshold voltage and then disconnect the relay. In a specific embodiment, the preset threshold voltage is 60V, and clear the allocation relationship of the charging module.

[0029] Step 3: 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; The specific steps include: 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. Allocate the group of charging modules to the main control board, recalculate the allocated power, and return to step S31.

[0030] In some embodiments, if the required power is still greater than the allocated power after all idle and assignable charging modules are assigned to the main control board, in addition to the above steps, the following steps are further included: 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 status of the group of charging modules is idle and can be allocated, allocate the group of charging modules to the main control board, recalculate the allocated power, and return to step S31.

[0031] Steps S51-S53 Figure 3 Not drawn in.

[0032] In some embodiments, in order to further improve the system response speed of step 2, as Figure 4 As shown in the figure, the module commands are optimized to save the overall cycle time and improve the response speed compared with the polling commands. The specific process is as follows: S61. Set the priority of the charging terminal with changed demand to 1; For multiple charging terminals, determine in turn whether the power demand of each charging terminal has changed, specifically including: output voltage, output current and switch command. If there is a change, set the priority of the charging terminal 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.

[0033] In this embodiment, the priority setting of the charging terminal is a setting of the command sending priority, which is used to improve the response speed. It is essentially different from the setting of the priority between the liquid-cooled charging terminal and the fast-charging charging terminal proposed in other embodiments in terms of the starting reason and the final effect, and they are two different settings.

[0034] Step 4: 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, exit a group of assigned charging modules. If not, do nothing.

[0035] In some embodiments, the power size of the preset buffer zone is set according to the percentage of the power of a single group of charging modules. The specific percentage can be set according to the actual situation of the charging stack, and no excessive restrictions are made here.

[0036] In this embodiment, the method for determining 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.

[0037] In some embodiments, the status of the allocatable flag and the assigned gun number flag is set according to the needs of the liquid-cooled charging terminal and the fast-charging charging terminal. For example: when the priority of the liquid-cooled charging terminal is set to the same as that of the fast-charging charging terminal, when a charging module is called by the fast-charging charging terminal, its allocatable flag = 1, the assigned gun number flag = 1, then the charging module cannot be called by the liquid-cooled charging terminal; when the priority of the liquid-cooled charging terminal is set to be higher than that of the fast-charging charging terminal, when a charging module is called by the fast-charging charging terminal, its allocatable flag = 0, the assigned gun number flag = 1, then it indicates that although the charging module has been called by the fast-charging charging terminal at this time, when the liquid-cooled charging terminal needs to call it, it can still be called by the liquid-cooled charging terminal after exiting; similarly, when the priority of the liquid-cooled charging terminal is set to be higher than that of the fast-charging charging terminal, when a charging module is called by the liquid-cooled charging terminal, its allocatable flag = 1, the assigned gun number flag = 1, then the charging module cannot be called by other charging terminals.

[0038] In another embodiment, the allocable flag of 0 indicates that the charging module is in an idle state, and the allocable flag of 1 indicates that the charging module is in a non-idle state. The allocable gun number flag corresponds to the charging terminal one by one. For example, if the charging module is occupied by the mth charging terminal, the allocable gun number flag is m. In this embodiment, the allocable flag is set with a corresponding delay between the variables of 0 and 1 as needed to ensure that the output relay is disconnected and that a series connection does not occur between the charging terminals.

[0039] Embodiment 2:

[0040] The present invention provides a device for dynamically adjusting power of a liquid-cooled charging stack, the device comprising: 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.

[0041] The liquid-cooled charging stack power dynamic allocation device provided in the embodiment of the present invention can execute the liquid-cooled charging stack power dynamic allocation method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0042] Embodiment three:

[0043] The embodiment of the present invention further provides an electronic terminal, which may be a server, and its internal structure diagram may be as shown in FIG. Figure 5As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to 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 data obtained and generated in the method for dynamically allocating power of a liquid-cooled charging stack. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the electronic terminal is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, the method for dynamically allocating power of a liquid-cooled charging stack in the aforementioned embodiment one is implemented.

[0044] Those skilled in the art will understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure 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 shown in the figure, or combine certain components, or have a different arrangement of components.

[0045] The electronic terminal provided in the embodiment of the present invention can execute the liquid-cooled charging stack power dynamic allocation method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0046] Embodiment 4:

[0047] The embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method steps described in the first embodiment are implemented.

[0048] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt 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 codes.

[0049] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0050] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0051] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection 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 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 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 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, 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. Allocate the group of charging modules to the main control board, recalculate the allocated power, and return to step S31.

4. The method for dynamic power allocation of a liquid-cooled charging stack according to claim 3, characterized in that: 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 status of the group of charging modules is idle and can be allocated, allocate the group of charging modules to the main control board, recalculate the allocated power, and return to step S31.

5. The method for dynamic power allocation of a liquid-cooled charging stack according to any one of claims 2 to 4, 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.

6. 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.

7. 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.

8. 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.

9. 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 7 are executed.

10. 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 7 are implemented.

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