A super-charging method, system and device based on multi-rectifier cabinet cooperation

Abstract

The application provides a super-charging method, system and device based on multi-rectifier cabinet cooperation, which comprises the following steps: regarding each power module as a source node and each physical main gun as a sink node, the physical main gun can call power modules in different rectifier cabinets, a directed edge is constructed based on whether the physical main gun can call the power module, the weight of the directed edge is determined based on the rated current value, real-time temperature and cumulative running time of the power module, and thus an initial power flow graph is constructed; a user-selected physical main gun is received, and a super-charging demand power is injected into the initial power flow graph as a demand flow to obtain a demand power flow graph; the power modules to be called are determined in combination with the principle of minimizing the sum of the weights of the directed edges; the power modules to be called are synchronously started, and after insulation detection and pre-charging voltage regulation, super-charging of the vehicle is started. The application completely breaks the physical barriers between rectifier cabinets, greatly improves resource utilization, and reduces equipment maintenance frequency and replacement cost.

Description

Technical Field

[0001] This invention relates to the field of charging pile technology, specifically to a supercharging method, system, and device based on multi-rectifier cabinet collaboration. Background Technology

[0002] With the increasing popularity of high-voltage fast-charging models of new energy vehicles, charging stations are rapidly evolving towards a high-power, split-type architecture. To improve the overall efficiency of the station, power modules from different rectifier cabinets will be integrated and utilized.

[0003] However, although the existing multi-rectifier cabinet parallel scheme has improved the maximum charging power of a single gun to some extent, it still has the following significant drawbacks when facing the upgrading of old charging stations and the increasingly complex supercharging requirements:

[0004] On the one hand, existing power station upgrade solutions often require large-scale reconstruction of the original power distribution system, or even replacement of the entire rectifier cabinet equipment. For mature, already operational power stations, this means high hardware procurement costs, long periods of downtime for construction, and complex cable laying projects, making it extremely uneconomical.

[0005] On the other hand, in existing split-type supercharging stations, the selection logic for power modules is usually quite simple, mainly based on the currently available power. While this method can achieve basic power allocation, it completely ignores the uneven aging problem caused by differences in usage frequency, service life, and heat dissipation conditions among different power modules. This leads to a severe divergence in the health status of different power modules within the same station, with some modules failing prematurely due to overuse, becoming a bottleneck in the entire charging system and increasing equipment maintenance frequency and replacement costs.

[0006] In summary, how to break down the physical barriers between rectifier cabinets at low cost and achieve flexible coordination and efficient utilization of power modules across the entire site is a technical problem that supercharging stations urgently need to solve. Summary of the Invention

[0007] This application addresses the shortcomings of existing technologies by providing a supercharging method, system, and apparatus based on multi-rectifier cabinet collaboration.

[0008] To solve the above-mentioned technical problems, this application provides the following technical solution: A supercharging method based on multi-rectifier cabinet collaboration includes the following steps: The initial power flow graph is constructed as follows: each power module in multiple rectifier cabinets is used as a source node, and each physical main gun is used as a sink node. Directed edges are constructed based on whether the physical main gun can call power modules. The weight of the directed edges is determined based on the rated current value, real-time temperature, and cumulative running time of the power modules. The physical main gun can call power modules in different rectifier cabinets. Receive the physical main gun selected by the user and inject the supercharging demand power as a demand flow into the initial power flow graph to obtain the demand power flow graph; Based on the power flow graph, and combined with the principle of minimizing the sum of directed edge weights, the power modules to be called are determined, thereby obtaining the power modules corresponding to the selected physical master gun and the virtual slave guns. The synchronous startup protocol is executed, causing the power module corresponding to the selected physical master gun and the virtual slave gun to start synchronously. After completing insulation detection and pre-charge voltage regulation, the vehicle begins to be overcharged.

[0009] In one possible implementation, the DC output buses of each rectifier cabinet are connected in parallel to a common DC bus; the central controller is connected to the common DC bus through a power distribution unit to establish electrical interconnection with the power modules in each rectifier cabinet; each power module outputs its rated current during charging, and the output voltage of each power module is the target voltage value.

[0010] As one possible implementation, the weight of the directed edge is represented as follows:

[0011] in, Indicates the first The physical main gun and the first The weights of the directed edges between the power modules Indicates the first Real-time temperature of each power module Indicates the first The rated current value of each power module, Indicates the first The cumulative operating time of each power module, Both represent adjustable weighting coefficients, and , , as well as Both represent normalization functions.

[0012] As one possible implementation, the weight of the directed edge also includes a basic weight. If the physical main gun and the rectifier cabinet where the power module is located are directly connected, the basic weight of the corresponding directed edge is the first preset weight; otherwise, the basic weight of the corresponding directed edge is the second preset weight. Wherein, the second preset weight > the first preset weight ≥ 0.

[0013] As one possible implementation, after receiving the physical master gun selected by the user, the method further includes: determining the power module that is directly connected to the selected physical master gun and has the smallest directed edge weight between it and the selected physical master gun as the communication power module of the selected physical master gun to provide voltage for handshake communication.

[0014] As one possible implementation, the power module corresponding to the selected physical master gun is the power module among the power modules to be called, and the power module whose rectifier cabinet is directly connected to the physical master gun; the virtual slave gun is the power module among the power modules to be called, and the power module whose rectifier cabinet is not directly connected to the physical master gun.

[0015] As one possible implementation, the execution of the synchronous startup protocol enables the power module corresponding to the selected physical master gun and the virtual slave gun to start synchronously, and after completing insulation detection and pre-charge voltage regulation, begin supercharging the vehicle, including the following steps: Close the DC contactor of the physical master gun and simultaneously send an enable command to each virtual slave gun; Insulation testing is performed on the physical master gun, and the port output voltage of each virtual slave gun is compared with the target voltage value to achieve voltage consistency verification. Once the physical master gun insulation test passes and the voltage consistency check of each virtual slave gun passes, disconnect the DC contactor of the physical master gun and disable each virtual slave gun. After closing the vehicle's contactor and receiving the vehicle's voltage, the system synchronously performs pre-charge voltage regulation to the target voltage for each called power module. When the DC contactor of the closed physical main gun is activated, all power modules are simultaneously used to charge the vehicle.

[0016] As one possible implementation, the method further includes: Monitor the vehicle's real-time supercharging power demand, the real-time temperature of each power module, and the overall load priority of the charging station. When the real-time supercharging demand power is lower than the preset ratio of the total output power of the currently called power module, the called power modules are released to the public resource pool in descending order of the weight of the directed edges until the total output power of the remaining called power modules is within the preset range of the real-time supercharging demand power. When the real-time temperature of any working power module exceeds the preset safe temperature threshold, at least one power module with a directed edge to the selected physical main gun is called from the public resource pool as a backup power module, and the connection of the power module whose real-time temperature exceeds the preset safe temperature threshold is disconnected after the backup power module stabilizes its output. When a higher priority charging task request is detected and the total power of the power modules that can be called is insufficient, the number of power modules called by the current low priority supercharging task is reduced according to the preset priority index, and the reduced power modules are released to the public resource pool for the higher priority charging task to call. The public resource pool refers to all power modules that have not performed charging tasks.

[0017] A supercharging system based on multi-rectifier cabinet collaboration is used to implement the method described in any one of the above methods. The system includes a graph construction module, a demand injection module, a power module determination module, and a charging execution module. The graph construction module is used to construct an initial power flow graph, specifically by taking each power module in multiple rectifier cabinets as a source node and each physical main gun as a sink node, constructing directed edges based on whether the physical main gun can call power modules, and determining the weight of the directed edges based on the rated current value, real-time temperature, and cumulative running time of the power modules; wherein, the physical main gun can call power modules in different rectifier cabinets. The demand injection module is used to receive the physical main gun selected by the user and inject the supercharging demand power as a demand flow into the initial power flow graph to obtain the demand power flow graph. The power module determination module is used to determine the power module to be called based on the required power flow graph and the principle of minimizing the sum of directed edge weights, thereby obtaining the power module corresponding to the selected physical master gun and the virtual slave gun. The charging execution module is used to execute the synchronous start protocol, so that the power module corresponding to the selected physical master gun and the virtual slave gun start synchronously, and start supercharging the vehicle after completing insulation detection and pre-charge voltage regulation.

[0018] A supercharging device based on multi-rectifier cabinet collaboration includes a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, it implements the method described in any one of the above descriptions.

[0019] This application, by adopting the above technical solution, has significant technical effects: (1) The method provided in this application does not require dismantling the existing rectifier cabinet. It only requires connecting the DC output terminal to the common bus and adding or replacing the power distribution unit to complete the physical upgrade. This greatly reduces the amount of cable laying and hardware replacement, and significantly reduces the material cost and construction period for upgrading old stations to supercharging stations.

[0020] (2) This application completely breaks the physical isolation of the existing rectifier cabinet. Based on the real-time needs of the supercharging terminal, any idle power module can be flexibly called from the entire site, thereby eliminating the drawbacks of local overload and global idleness, and greatly improving the overall power utilization rate of the site.

[0021] (3) This application comprehensively considers multiple dimensions such as the rated current value, real-time temperature, and cumulative operating time of each power module, dynamically calculates the weight of the directed edge, and uses this as the basis for power module call decisions. It delays the uneven aging process of power modules from the source, keeps the health status of power modules in the entire station relatively consistent, significantly extends the mean time between failures and the overall service life of power modules, reduces the frequency of equipment maintenance and replacement costs, and improves the economic benefits of the entire life cycle of the charging station. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the method flow of an embodiment of the method in this application; Figure 2 This is a schematic diagram of the overall structure of the multi-rectifier cabinet collaborative supercharging in this application; Figure 3 This is a schematic diagram of the system structure of an embodiment of the system in this application. Detailed Implementation

[0024] The present application will be further described in detail below with reference to the embodiments. The following embodiments are explanations of the present application, but the present application is not limited to the following embodiments. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0025] To facilitate understanding of the technical solution of this application, the relevant technical terms will be explained below.

[0026] Physical main charging gun and virtual slave charging gun: The physical main charging gun is the physical charging gun that the user actually plugs into the vehicle. The virtual slave charging gun is a power enhancement resource that serves the physical main charging gun. Both the physical main charging gun and the virtual slave charging gun are essentially power-drawing interfaces; they do not produce electrical energy themselves, but obtain electrical energy by connecting to the power modules in the rectifier cabinet. There is only one physical main charging gun, and each physical main charging gun corresponds to at least one power module. There may be no virtual slave charging gun, only one, or multiple virtual slave charging guns, and each virtual slave charging gun corresponds to one power module.

[0027] Example 1: In one embodiment, a supercharging method based on multi-rectifier cabinet collaboration, such as... Figure 1 As shown, it includes the following steps: S100: Construct an initial power flow graph, specifically: take each power module in multiple rectifier cabinets as a source node, take each physical main gun as a sink node, construct directed edges based on whether the physical main gun can call power modules, and determine the weight of the directed edges based on the rated current value, real-time temperature and cumulative running time of the power modules; wherein, the physical main gun can call power modules in different rectifier cabinets; S200: Receive the physical main gun selected by the user and inject the supercharging demand power as a demand flow into the initial power flow graph to obtain the demand power flow graph; S300: Based on the power flow graph of the required power, and combined with the principle of minimizing the sum of the weights of the directed edges, determine the power modules to be called, and then obtain the power modules corresponding to the selected physical master gun and the virtual slave guns. S400: Execute the synchronous start protocol to enable the power module corresponding to the selected physical master gun and the virtual slave gun to start synchronously, and start supercharging the vehicle after completing insulation detection and pre-charge voltage regulation.

[0028] In another embodiment, such as Figure 2 The diagram shows the overall structure of multi-rectifier cabinet collaborative supercharging. In order to enable the physical main gun to call the power modules in different rectifier cabinets, the DC output bus of each rectifier cabinet needs to be connected in parallel to the common DC bus.

[0029] Traditional split-type charging piles have independent outputs for each rectifier cabinet. To enable cross-cabinet access, the DC outputs of all rectifier cabinets must be physically connected in parallel. This can be achieved by laying large-section DC power cables in parallel between the cabinets, or by using a shared DC busbar or bus duct to form a common DC bus. The outputs of all rectifier cabinets are physically connected in parallel to this common DC bus, forming a shared resource pool for the entire site. The common DC bus serves as the backbone, directly connecting to the input of the power distribution unit. The power distribution unit contains a switch array composed of numerous high-voltage DC contactors. Its input is connected to the common DC bus, while its output corresponds to each charging circuit. The output of the power distribution unit extends to each physical charging gun via large-section DC power cables. In this way, the electrical energy output from any power module in any rectifier cabinet can flow to any physical charging gun within the site via the common DC bus.

[0030] Given that cross-cabinet calls involve high-frequency coordination among multiple rectifier cabinets, this application further constructs a high-speed, low-latency underlying communication architecture. All rectifier cabinets, physical main guns, and the central controller are connected via industrial Ethernet, CAN bus, or fiber optics to form a highly reliable ring or star topology network. In this network, each power module and physical main gun is assigned an independent MAC address or unique node ID, enabling the central controller and power distribution unit to accurately address and communicate point-to-point with the target device. This ensures that the vehicle's BMS requirements can be transmitted to any designated node in the entire station within milliseconds, providing a solid underlying guarantee for the real-time performance and accuracy of dynamic power reconfiguration.

[0031] This application upgrades the charging station by connecting the DC outputs of multiple existing rectifier cabinets in parallel to a common DC bus to construct a common resource pool, modifying the central controller at the software level to match the supercharging scheduling method, and adding or replacing a power distribution unit. The central controller establishes electrical interconnection with the power modules in each rectifier cabinet through the power distribution unit. Based on the real-time charging needs of the supercharging terminals, the central controller can flexibly schedule any power module in the entire station to connect with it, truly breaking down physical boundaries and achieving seamless allocation of cross-cabinet resources.

[0032] Each power module outputs its rated current during charging, and the output voltage of each power module is the target voltage value. Because all power modules are connected in parallel to the same DC bus and connected to the same vehicle, their operating voltage values ​​are uniform. This uniform voltage value is the real-time charging voltage (target voltage value) currently required by the vehicle.

[0033] In another embodiment, S100 includes the following steps: S110: Each power module in multiple rectifier cabinets is used as a source node.

[0034] Traverse all rectifier cabinets and their internal power modules, construct each power module as a source node of the graph, assign a unique source node ID to each physical power module, and record the source node attributes, including rated current, current status, cumulative running time, and real-time temperature. The current status is divided into online, offline, and fault.

[0035] S120: Treat each physical master gun as a sink node.

[0036] Iterate through all supercharging terminals (physical main guns), model each supercharging terminal as a sink node in a graph, assign a unique sink node ID to each supercharging terminal, and record the sink node attributes. Sink node attributes include maximum allowable voltage or current and the ID of the currently connected vehicle.

[0037] S130: Construct a directed edge based on whether the physical main gun can call the power module.

[0038] The supercharging terminal allows power modules from multiple different rectifier cabinets to supply power to it. If a power module can be connected to the supercharging terminal, there is a directed edge from the power module to the supercharging terminal. Specifically, if the power module is physically connected to the bus of the rectifier cabinet and the DC output bus of the rectifier cabinet is connected in parallel to the common DC bus, then the power module can be connected to the supercharging terminal.

[0039] S140: Determine the weight of the directed edge based on the rated current value, real-time temperature, and cumulative operating time of the power module.

[0040] The weights of directed edges in this application Indicates power module Supercharging terminal The power supply cost, and the real-time temperature of the corresponding power module. Rated current value and cumulative running time If they are related, then the weights of the directed edges are... , means as follows:

[0041] in, Indicates the first The physical main gun and the first The weights of the directed edges between the power modules.

[0042] Indicates the first Real-time temperature of each power module Represents the normalization function. The temperature efficiency coefficient indicates the higher the temperature of the power module. The higher the temperature of the power module, the more severe the heat generation, which leads to lower operating efficiency and may even trigger over-temperature protection. Therefore, the higher the temperature efficiency coefficient is.

[0043] Indicates the first The rated current value of each power module, Represents the normalization function. This represents the current efficiency coefficient. Rated current is an inherent parameter of the power module, representing the current value that the power module can continuously output under nominal operating conditions. Modules with higher rated current have stronger power output capabilities. Prioritizing their use can more efficiently meet the high power demands of supercharging terminals, while avoiding the use of too many low-rated current modules to reach the required total power, thereby reducing the number of parallel modules and lowering system complexity. Therefore, power modules with higher rated current values ​​receive lower weights, meaning they are used more frequently.

[0044] Indicates the first The cumulative operating time of each power module, Represents the normalization function. This indicates the wear coefficient. Components inside power modules, such as relays, fans, and capacitors, have a mechanical lifespan. Prolonged full-load operation of the same batch of power modules will cause them to fail prematurely, while other modules remain idle for extended periods. Record the historical operating time of each power module. For power modules with long operating times, the wear coefficient is... The wear coefficient is relatively large for newly installed or long-idle power modules. The wear and tear is relatively small. This allows for even wear distribution across all power modules in the charging station. By configuring the system, different power modules can be used in rotation by the physical main gun, thereby extending the lifespan of the entire charging station's hardware and reducing maintenance and replacement costs.

[0045] Both represent adjustable weighting coefficients, and .

[0046] In another embodiment, the weight of the directed edge also includes a basic weight. If the physical main gun and the rectifier cabinet where the power module is located are directly connected, the basic weight of the corresponding directed edge is the first preset weight; otherwise, the basic weight of the corresponding directed edge is the second preset weight. Wherein, the second preset weight > the first preset weight ≥ 0.

[0047] Transmitting large currents over long distances can lead to severe line voltage drops and power losses, which not only wastes electricity but also causes additional heat dissipation problems. Therefore, if the rectifier cabinet where the power module is located is directly connected to the physical main gun, the basic weight, i.e. the power supply cost, is a smaller value (first preset weight). If the rectifier cabinet where the power module is located is not directly connected to the physical main gun, the basic weight is a larger value (second preset weight).

[0048] In another embodiment, in S200, the user-selected physical main gun is received, and the supercharging demand power is injected as a demand flow into the initial power flow graph to obtain the demand power flow graph, including the following steps: S210: Receives the physical master gun selected by the user.

[0049] Once a customer selects a physical charging gun and inserts it into the supercharging vehicle model, the physical charging gun for supercharging the vehicle is determined.

[0050] S220: Inject the supercharging demand power as a demand flow into the initial power flow graph to obtain the demand power flow graph.

[0051] After the physical main gun is inserted into the supercharger vehicle, the vehicle and the charging station communicate with each other. The charging station parses the battery handshake message (BHM) to obtain the vehicle's battery pack's rated voltage, maximum allowable charging current, battery type, and initial remaining charge (SOC). Based on the rated voltage and maximum charging current, the charging station obtains the vehicle's maximum power requirement.

[0052] If the maximum power demand exceeds the physical maximum power of the charging station, the overcharging power demand will be limited to the maximum power of the charging station. If the maximum power demand is 0 or an abnormal value, the charging request will be rejected.

[0053] The supercharging power demand is injected into the sink node corresponding to the physical master gun in the initial power flow graph in the form of a demand flow, resulting in a power flow graph with demand flow, i.e., a demand power flow graph.

[0054] If multiple supercharging terminals within a single facility request a service simultaneously, each request is injected into an independent demand stream. Subsequent allocation can be based on priority, such as first-come, first-served or based on the urgency of the State of Charge (SOC).

[0055] In another embodiment, after step S210 (receiving the physical master gun selected by the user), the method further includes: determining the power module whose rectifier cabinet is directly connected to the selected physical master gun and whose directed edge weight between it and the selected physical master gun is the communication power module of the selected physical master gun to provide voltage for handshake communication.

[0056] Before the charging station and the vehicle can communicate, a power module needs to be assigned to the supercharging terminal (physical main gun). When the physical main gun is plugged into the vehicle, the vehicle's Battery Management System (BMS) is still in a dormant or low-power state. The charging station needs to output a standard low-voltage power supply to power the vehicle's power management module so that the two parties can begin subsequent communication. This basic low voltage needs to be provided by the power module already bound to the physical main gun. Without this module, the main gun will not have power, the vehicle's BMS cannot be activated, and the subsequent handshake communication cannot begin at all.

[0057] In addition, whenever a physical main charging gun is occupied, at least one power module must be locked for it. This design also prevents the awkward situation of having to wait until there are no power modules available after the charging is completed during peak periods with multiple vehicles operating concurrently. By securing one power module for backup charging, the stability of the station's scheduling is ensured.

[0058] After the physical main gun is assigned a backup module (communication power module), the remaining power modules are dynamically allocated from the public resource pool to jointly achieve supercharging.

[0059] In another embodiment, in S300, based on the required power flow graph and the principle of minimizing the sum of directed edge weights, the power module to be invoked is determined, thereby obtaining the power module corresponding to the selected physical master gun and the virtual slave gun, including the following steps: S310: The initial cumulative rated power is the rated power of the communication power module.

[0060] S320: Based on the initial cumulative rated power and in accordance with the principle of minimizing the sum of directed edge weights, determine the power module to be invoked.

[0061] The power modules that have directed edges with the selected physical main gun are arranged in ascending order of directed edge weight, and the power modules are selected one by one until the cumulative rated power of the selected power modules reaches the preset range of the supercharging power requirement (e.g., 95%~105%). The selected power modules are the power modules that the selected physical main gun needs to call.

[0062] In another embodiment, if the cumulative rated power cannot reach the preset range of the charging power demand, the actual output power of the last selected power module is adjusted according to the difference between the overcharging power demand and the previous cumulative rated power.

[0063] If the current cumulative rated power, calculated by adding the rated power of the last selected power module to the previous cumulative rated power, cannot reach the preset range of the supercharging power requirement, then without adding the last power module, the current cumulative rated power will be far below the preset range of the supercharging power requirement; conversely, with adding the last power module, the current cumulative rated power will exceed the preset range of the supercharging power requirement. This situation not only exists in actual supercharging scenarios but is also very common. This is essentially because the rated power of the power module is a fixed unit (e.g., 40kW each), while the charging demand of the vehicle is continuously changing. Therefore, the actual output current of the last selected power module can be adjusted to change its actual output power. The output current / power can be precisely controlled by adjusting the PWM duty cycle of the last selected power module.

[0064] In another embodiment, the power module corresponding to the selected physical master gun is the power module among the power modules to be called, and whose rectifier cabinet is directly connected to the physical master gun. The virtual slave gun is the power module among the power modules to be called, and whose rectifier cabinet is not directly connected to the physical master gun.

[0065] There is only one physical master gun, which can directly control the power modules in the rectifier cabinet directly connected to it. Each physical master gun corresponds to at least one power module. There can be zero or one or more virtual slave guns, with each virtual slave gun corresponding to one power module.

[0066] In another embodiment, in S400, the execution of the synchronous startup protocol, which causes the power module corresponding to the selected physical master gun and the virtual slave gun to start synchronously, and after completing insulation detection and pre-charge voltage regulation, begins supercharging the vehicle, includes the following steps: S410: Close the DC contactor of the physical master gun and simultaneously send an enable command to each virtual slave gun.

[0067] Once the vehicle completes the handshake communication and determines the power module to be invoked, it simultaneously issues a start command to the physical master gun and all virtual slave guns.

[0068] After receiving the command, the physical main gun closes its DC contactor. The physical main gun has actual contactor hardware, so this operation actually drives the contactor coil, causing the positive and negative contacts in the physical main gun circuit to close mechanically.

[0069] Since the virtual slave gun lacks a physical contactor, it needs to be mapped to an enabled power module to function as a closed DC contactor. This can be achieved by sending an enable command to each power module corresponding to the virtual slave gun via software, putting the module's internal power circuit into a standby state. However, the module's output remains in a high-impedance state or with zero voltage output. After the command is executed, the power module corresponding to the virtual slave gun is enabled, and its output is electrically connected to the common DC bus.

[0070] From an electrical perspective, the power modules corresponding to both the physical master gun and the virtual slave gun are already in a ready-to-output state, but no voltage has been applied yet. Both sides achieve synchronous conduction at this moment. However, the physical master gun achieves conduction through mechanical contacts, while the virtual slave gun achieves conduction through an internal electronic switch. Their conduction mechanisms are different, but the goal is to synchronously complete the circuit preparation.

[0071] S420: Perform insulation testing on the physical master gun, and simultaneously compare the port output voltage of each virtual slave gun with the target voltage value to achieve voltage consistency verification.

[0072] After the connection is completed, an "insulation test" is performed simultaneously.

[0073] The physical main gun performs direct insulation testing. Utilizing its built-in insulation detection circuit, it measures the insulation resistance between the positive and negative terminals and the vehicle chassis. This is a real physical measurement process, typically taking hundreds of milliseconds. The test results directly reflect the insulation status to ground of the entire DC circuit connected to the main gun.

[0074] Virtual slave guns perform indirect insulation testing. Since they lack independent insulation testing hardware, they do not perform actual insulation resistance measurements. Instead, they read the voltage to ground at the output port of the corresponding power module for each virtual slave gun and compare it to the target voltage required for actual charging. If the deviation between the output voltage of all virtual slave guns and the target voltage is less than a preset threshold (e.g., 5V), the voltage consistency check of the virtual slave gun is considered passed, and its insulation condition can be inferred to be acceptable. This method is called virtual / indirect insulation testing; it does not measure insulation resistance but indirectly verifies safety through voltage consistency.

[0075] S430: When the insulation test of the physical master gun passes and the voltage consistency verification of each virtual slave gun passes, disconnect the DC contactor of the physical master gun and disable each virtual slave gun.

[0076] After the "insulation test" is passed, the vehicle will proceed to the pre-charge voltage regulation stage. It is necessary to ensure that the vehicle's internal contactor is disconnected and that the charging pile is also disconnected to facilitate subsequent voltage matching.

[0077] A disconnect command is sent to the DC contactor of the physical master gun, de-energizing the contactor coil, mechanically separating the contacts, and physically cutting off the physical master gun circuit. An output disable or standby command is sent to each power module corresponding to the virtual slave gun, turning off the electronic switch inside the power module and ceasing voltage output. Since the virtual slave gun does not have a physical contactor, this operation essentially only switches the power module from an enabled / standby state back to a disabled state.

[0078] S440: Closes the vehicle's contactor, receives the vehicle's voltage, and synchronously performs pre-charge voltage regulation to the target voltage for each called power module.

[0079] After the vehicle closes its internal contactor, the vehicle battery voltage is already displayed at the vehicle-side interface. Simultaneously, the output voltage of all power modules is adjusted to match the vehicle battery voltage to avoid inrush current at the moment of closure.

[0080] The power modules corresponding to the physical master gun and each virtual slave gun are regulated by an internal voltage closed-loop control circuit to perform voltage ramp-up, causing the output voltage of the power modules to gradually rise from zero to the vehicle battery voltage (target voltage value). The output voltage of each power module is continuously monitored, and when the deviation between the output voltage of all power modules and the vehicle battery voltage is within the allowable range (e.g., ±2V), the pre-charge voltage regulation is completed.

[0081] S450: The DC contactor of the closed physical main gun is used to simultaneously charge the vehicle using all power modules.

[0082] After pre-charge voltage regulation is complete, a closing command is sent again to the DC contactor of the main charging gun. The contactor mechanically closes, and the physical main charging gun circuit is activated. The virtual slave charging gun does not require any additional operation. This is because after pre-charge voltage regulation, the power module corresponding to the virtual slave charging gun is already enabled and its output voltage matches the vehicle voltage. Its output terminal is always connected in parallel with the physical main charging gun circuit through a common DC bus. When the contactor of the physical main charging gun closes, the entire parallel circuit naturally forms a closed circuit, and current will automatically flow from each module to the vehicle according to its internal resistance and voltage setting value. The virtual slave charging gun does not have a contactor that needs to be closed again, so this step is transparent to the virtual slave charging gun. When officially entering the charging state, the contactor of the physical main charging gun remains closed, and all power modules participating in the charging simultaneously output power to the vehicle.

[0083] In another embodiment, step S500 is further included, which comprises the following steps: S510: Monitors the vehicle's real-time supercharging power demand, the real-time temperature of each power module, and the overall load priority of the charging station.

[0084] It can acquire in real time the target voltage, target current, current SOC, maximum allowable charging power of the battery reported by the vehicle BMS, as well as the output current, output voltage of each power module, and real-time temperature fed back by the built-in NTC thermistor, and the access status and priority tags of other physical main guns.

[0085] S520: Based on the real-time supercharging power demand, the real-time temperature of each power module, and the overall load priority of the charging station, adjust the power modules that the selected physical main gun needs to call. Specifically: (1) When the real-time supercharging demand power is lower than a preset ratio of the total output power of the currently called power modules, the called power modules are released to the public resource pool in descending order of the weight of the directed edges, until the total output power of the remaining called power modules is within the preset range of the real-time supercharging demand power. The public resource pool refers to all power modules that have not performed charging tasks.

[0086] When a vehicle is nearing full charge and entering the final stage of constant-voltage charging, the BMS will proactively reduce the required current, or limit the charging power if the vehicle's battery temperature is too high. At this point, the vehicle's real-time supercharging power demand will be lower than the total output power of the currently called power modules. When the real-time supercharging power demand is lower than a preset ratio of the total output power (e.g., 0.8), the called power modules are released sequentially according to the directed edge weights from largest to smallest. This satisfies the vehicle's current derating requirement while freeing up resources for other vehicles in the depot that need supercharging, greatly improving resource utilization.

[0087] (2) When the real-time temperature of any working power module is detected to exceed the preset safe temperature threshold, at least one power module with a directed edge between it and the selected physical main gun is called from the public resource pool as a backup power module, and the connection of the power module whose real-time temperature exceeds the preset safe temperature threshold is disconnected after the backup power module has a stable output.

[0088] Prolonged full-load operation of the power module can lead to overheating, or a cooling fan failure can cause the module's real-time temperature to exceed a safe threshold. In such cases, the power module needs to be temporarily shut down. However, to avoid impacting the vehicle's supercharging, a backup module must be retrieved from the public resource pool to replace the overheated module (whose real-time temperature exceeds the preset safe temperature threshold). Directly disconnecting the overheated power module would cause a sudden drop in total output power, potentially triggering an error or even interrupting charging in the vehicle's BMS due to the sudden current change. By first connecting and stabilizing the output of the backup power module, the power gap is filled, and then the overheated power module is safely disconnected. The entire process is completely imperceptible to the vehicle and the user experience, while avoiding the safety hazards of thermal runaway from the power module.

[0089] (3) When a higher priority charging task request is detected and the total power of the power modules that can be called is insufficient, the number of power modules called by the current low priority overcharging task is reduced according to the preset priority index, and the reduced power modules are released to the public resource pool for the higher priority charging task to call.

[0090] When a high-level member vehicle, a vehicle about to leave the station, or a vehicle with extremely low battery power that urgently needs to be recharged enters the station, the station receives a higher priority charging task. If the power of the available power modules at the station is insufficient at this time, it is necessary to reduce the number of power modules called by low-priority tasks according to the preset priority index and release them to the public resource pool for high-priority tasks to call. However, vehicles whose power modules are released must retain at least a minimum power module.

[0091] Example 2: A supercharging system based on multi-rectifier cabinet collaboration, such as Figure 3 As shown, the system for implementing the method described in any of the above embodiments includes a graph construction module 100, a demand injection module 200, a power module determination module 300, and a charging execution module 400. The graph construction module 100 is used to construct an initial power flow graph, specifically by taking each power module in multiple rectifier cabinets as a source node and each physical main gun as a sink node, constructing directed edges based on whether the physical main gun can call power modules, and determining the weight of the directed edges based on the rated current value, real-time temperature, and cumulative running time of the power modules; wherein, the physical main gun can call power modules in different rectifier cabinets; The demand injection module 200 is used to receive the physical main gun selected by the user and inject the supercharging demand power as a demand flow into the initial power flow graph to obtain the demand power flow graph. The power module determination module 300 is used to determine the power module to be called based on the required power flow graph and the principle of minimizing the sum of directed edge weights, thereby obtaining the power module corresponding to the selected physical master gun and the virtual slave gun. The charging execution module 400 is used to execute a synchronous start-up protocol, so that the power module corresponding to the selected physical master gun and the virtual slave gun start synchronously, and after completing insulation detection and pre-charge voltage regulation, start supercharging the vehicle.

[0092] All changes and modifications made without departing from the spirit and scope of this application, and all equivalent technical solutions, also fall within the scope of this application.

[0093] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0094] Those skilled in the art will understand that embodiments of this application can be provided as methods, apparatus, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied 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.

[0095] This application is described with reference to flowchart illustrations and / or block diagrams of the method, terminal device (system), and computer program product according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, as well as combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0096] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0097] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal equipment, causing a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0098] It should be noted that: The phrase "an embodiment" or "an embodiment" used in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of this application. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0099] Furthermore, it should be noted that the shapes and names of the parts and components described in the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this application are included within the scope of protection of this application. Those skilled in the art to which this application pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, as long as they do not deviate from the structure of this application or exceed the scope defined by the claims, all of which should fall within the scope of protection of this application.

Claims

1. A supercharging method based on multi-rectifier cabinet collaboration, characterized in that, Includes the following steps: The initial power flow graph is constructed as follows: each power module in multiple rectifier cabinets is used as a source node, and each physical main gun is used as a sink node. Directed edges are constructed based on whether the physical main gun can call power modules. The weight of the directed edges is determined based on the rated current value, real-time temperature, and cumulative running time of the power modules. The physical main gun can call power modules in different rectifier cabinets. Receive the physical main gun selected by the user, and inject the supercharging demand power as a demand flow into the initial power flow graph to obtain the demand power flow graph; Based on the power flow graph, and combined with the principle of minimizing the sum of directed edge weights, the power modules to be called are determined, thereby obtaining the power modules corresponding to the selected physical master gun and the virtual slave guns. The synchronous startup protocol is executed to enable the power module corresponding to the selected physical master gun and the virtual slave gun to start synchronously. After completing insulation detection and pre-charge voltage regulation, the vehicle is then overcharged. The DC output buses of each rectifier cabinet are connected in parallel to a common DC bus; the central controller is connected to the common DC bus through a power distribution unit to establish electrical interconnection with the power modules in each rectifier cabinet; each power module outputs its rated current during charging, and the output voltage of each power module is the target voltage value. Also includes: Monitor the vehicle's real-time supercharging power demand, the real-time temperature of each power module, and the overall load priority of the charging station. When the real-time supercharging demand power is lower than the preset ratio of the total output power of the currently called power module, the called power modules are released to the public resource pool in descending order of the weight of the directed edges until the total output power of the remaining called power modules is within the preset range of the real-time supercharging demand power. When the real-time temperature of any working power module exceeds the preset safe temperature threshold, at least one power module with a directed edge to the selected physical main gun is called from the public resource pool as a backup power module, and the connection of the overheated power module is disconnected after the backup power module stabilizes its output. When a higher priority charging task request is detected and the total power of the power modules that can be called is insufficient, the number of power modules called by the current low priority supercharging task is reduced according to the preset priority index, and the reduced power modules are released to the public resource pool for the higher priority charging task to call. The public resource pool refers to all power modules that have not performed charging tasks.

2. The method according to claim 1, characterized in that, The weights of the directed edges are represented as follows: in, Indicates the first The physical main gun and the first The weights of the directed edges between the power modules Indicates the first Real-time temperature of each power module Indicates the first The rated current value of each power module, Indicates the first The cumulative operating time of each power module, Both represent adjustable weighting coefficients, and , , as well as Both represent normalization functions.

3. The method according to claim 1, characterized in that, The weight of the directed edge also includes a basic weight. If the physical main gun and the rectifier cabinet where the power module is located are directly connected, the basic weight of the corresponding directed edge is the first preset weight; otherwise, the basic weight of the corresponding directed edge is the second preset weight. Wherein, the second preset weight > the first preset weight ≥ 0.

4. The method according to claim 1, characterized in that, After receiving the physical main gun selected by the user, the process also includes: The power module whose rectifier cabinet is directly connected to the selected physical main gun and has the smallest directed edge weight between it and the selected physical main gun is determined as the communication power module of the selected physical main gun to provide voltage for handshake communication.

5. The method according to claim 1, characterized in that: The power module corresponding to the selected physical main gun is the power module among the power modules to be called, and the power module whose rectifier cabinet is directly connected to the physical main gun. The virtual slave gun is the power module that needs to be called, and whose rectifier cabinet is not directly connected to the physical master gun.

6. The method according to claim 1, characterized in that, The execution of the synchronous startup protocol enables the power module corresponding to the selected physical master gun and the virtual slave gun to start synchronously. After completing insulation detection and pre-charge voltage regulation, the vehicle is then overcharged, which includes the following steps: Close the DC contactor of the physical master gun and simultaneously send an enable command to each virtual slave gun; Insulation testing is performed on the physical master gun, and the port output voltage of each virtual slave gun is compared with the target voltage value to achieve voltage consistency verification. Once the physical master gun insulation test passes and the voltage consistency check of each virtual slave gun passes, disconnect the DC contactor of the physical master gun and disable each virtual slave gun. After closing the vehicle's contactor and receiving the vehicle's voltage, the system synchronously performs pre-charge voltage regulation to the target voltage for each called power module. When the DC contactor of the closed physical main gun is activated, all power modules are simultaneously used to charge the vehicle.

7. A supercharging system based on multi-rectifier cabinet collaboration, used to implement the method as described in any one of claims 1 to 6, characterized in that, The system includes a graph construction module, a demand injection module, a power module determination module, and a charging execution module. The graph construction module is used to construct an initial power flow graph, specifically by taking each power module in multiple rectifier cabinets as a source node and each physical main gun as a sink node, constructing directed edges based on whether the physical main gun can call power modules, and determining the weight of the directed edges based on the rated current value, real-time temperature, and cumulative running time of the power modules; wherein, the physical main gun can call power modules in different rectifier cabinets. The demand injection module is used to receive the physical main gun selected by the user and inject the supercharging demand power as a demand flow into the initial power flow graph to obtain the demand power flow graph. The power module determination module is used to determine the power module to be called based on the required power flow graph and the principle of minimizing the sum of directed edge weights, thereby obtaining the power module corresponding to the selected physical master gun and the virtual slave gun. The charging execution module is used to execute the synchronous start protocol, so that the power module corresponding to the selected physical master gun and the virtual slave gun start synchronously, and start supercharging the vehicle after completing insulation detection and pre-charge voltage regulation.

8. A supercharging device based on multi-rectifier cabinet collaboration, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the method as described in any one of claims 1 to 6.

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