Charging system and channel matching method thereof, and charging device

Abstract

The application discloses a charging system and a channel matching method thereof and a charging device, and relates to the technical field of electric vehicle charging. The charging system comprises at least two power modules, and the power modules are connected according to a preset connection mode. The method comprises the following steps: determining at least two target matching paths based on the preset connection mode of the power modules; and controlling the power modules on the target matching paths to perform channel matching synchronously. Thus, the channel matching efficiency of the charging system is improved.

Description

Technical Field

[0001] This application relates to the field of electric vehicle charging technology, and in particular to a charging system and its channel matching method and charging equipment. Background Technology

[0002] In a multi-pile charging system, multiple charging guns are connected to the power grid via DC power cabinets to provide charging services for electric vehicles simultaneously. To ensure the efficiency and stability of the charging process, channel matching of each power module in the charging system is required before use to determine whether each power module is in the designated channel.

[0003] The existing channel matching method for multi-pile group charging systems is mainly to use a charging gun to perform channel matching tests on all power modules one by one. When the gun cannot complete the test, it switches to the next gun. This channel matching method has low matching efficiency. As the number of power modules increases, the time spent on channel matching will also increase linearly. In addition, due to the low utilization rate of charging piles, it will also cause a certain amount of resource waste. Summary of the Invention

[0004] The main objective of this application is to provide a charging system and its channel matching method and charging device to improve the channel matching efficiency of the charging system.

[0005] To achieve the above objectives, this application provides a channel matching method for a charging system, the charging system comprising at least two power modules, wherein the power modules are connected according to a preset connection method; the method includes:

[0006] Based on the preset connection method of each power module, at least two target matching paths are determined;

[0007] The power modules on each target matching path are controlled to perform channel matching synchronously.

[0008] Optionally, the target matching paths are complementary, such that any of the power modules is located on at least one of the target matching paths.

[0009] Optionally, the charging system further includes at least two charging interfaces, each of which is directly connected to a corresponding designated power module; at least a portion of the target matching paths originate from the power module directly connected to the charging interface.

[0010] Optionally, the number of target matching paths is greater than or equal to 2 and less than or equal to the number of charging ports.

[0011] Optionally, the charging system further includes at least one sampling point, each sampling point being located away from the power module directly connected to each of the charging interfaces, and at least a portion of the target matching paths originating from the power module directly connected to the sampling point.

[0012] Optionally, controlling the power modules of each target matching path to synchronously perform channel matching includes: for any target matching path, starting from the starting point of the target matching path, sequentially controlling the power modules on the target matching path to perform channel matching until any power module in the target matching path fails to perform channel matching or all power modules on the target matching path successfully perform channel matching.

[0013] Optionally, controlling the power modules of each target matching path to synchronously perform channel matching includes: if the same power module is synchronously matched based on different target matching paths, then any one of the target matching paths is selected to continue the current matching process, and the matching process of other target matching paths that have already matched the current power module is terminated.

[0014] Optionally, the step of controlling the power modules of each of the target matching paths to synchronously perform channel matching includes: for any power module located on at least two of the target matching paths, if the matching result of the first channel matching of the power module is a matching failure, then select other target matching paths containing the power module to perform cross-validation on the power module; wherein, if the channel matching result of the power module is a matching failure in each cross-validation channel matching process, then the power module is determined to be a faulty module.

[0015] Optionally, the method further includes: determining at least two preset matching paths based on the preset connection method of each power module; determining the current state of each power module; for any power module, if the current state of the power module is unmatched or uncross-validated, then the power module is determined as a target power module; wherein, the uncross-validated power module is a power module with a unique corresponding target matching path and a channel matching result of matching failure; traversing each preset matching path and controlling the target power module on the available preset matching path to perform channel matching until a preset condition is met to end the matching process; wherein, if the current state of all power modules located before the target power module in the preset matching path is matching success and / or offline, then the preset matching path is determined to be available, and the preset condition includes all power modules having undergone channel matching and / or cross-validation and / or traversing all the preset matching paths.

[0016] Optionally, the channel matching process includes: controlling the power module to power on at a set voltage and determining the output sampling voltage of the power module; and determining the channel matching result of the power module based on the set voltage and the output sampling voltage of the power module.

[0017] In addition, to achieve the above objectives, this application also provides a charging device, including a controller and at least two power modules, wherein each power module is connected to the other according to a preset connection method; the controller includes a memory and a processor, the memory stores a computer program, and the processor executes the computer program to implement the channel matching method of the charging system as described in any of the above claims.

[0018] This application also provides a charging system, including the charging device as described above and at least two charging terminals. The power modules in the charging device are connected according to a preset connection method, and each charging terminal is directly connected to a corresponding designated power module. The charging device is used to determine at least two target matching paths based on the preset connection method of each power module, and sequentially control each power module to power on with a set voltage according to each target matching path. The charging terminal is used to determine the output sampling voltage of each power module and transmit the output sampling voltage to the charging device. The charging device is also used to determine the channel matching result of any power module based on the set voltage and the output sampling voltage of the power module.

[0019] The channel matching method of the charging system in this application determines at least two target matching paths based on the preset connection method of each power module, and then controls the power modules on each target matching path to perform channel matching synchronously. Thus, the channel matching process of the power modules starts simultaneously from at least two starting points, which effectively improves the channel matching efficiency of the charging system and solves the problem of prolonged channel matching time caused by the increase in the number of power modules. Attached Figure Description

[0020] Figure 1 This is a scenario example of the channel matching method for a charging system according to an embodiment of this application;

[0021] Figure 2 This is one of the flowcharts of the channel matching method of the charging system according to an embodiment of this application;

[0022] Figure 3 The example demonstrates the default connection method for the first type of power module;

[0023] Figure 4 The example demonstrates the default connection method for the second type of power module;

[0024] Figure 5This is a schematic diagram showing the location of sampling points as a specific example of this application;

[0025] Figure 6 The example demonstrates the default connection method for the third type of power module;

[0026] Figure 7 This is the second flowchart of the channel matching method of the charging system according to an embodiment of this application;

[0027] Figure 8 This is a schematic diagram of the channel matching device of the charging system according to an embodiment of this application;

[0028] Figure 9 A schematic diagram of the physical structure of a controller is provided;

[0029] In the diagram, 110 is the power module; 120 is the charging terminal; 130 is the controller; 140 is the switching unit; 800 is the channel matching device for the charging system; 810 is the path determination module; 820 is the matching module; 910 is the processor; 920 is the communication interface; 930 is the memory; and 940 is the communication bus.

[0030] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] With the increasing popularity of electric vehicles, the demand for charging infrastructure is growing. In multi-pile charging systems, multiple charging guns are connected to the power grid via DC power cabinets to provide charging services for multiple electric vehicles simultaneously.

[0033] However, before a charging system is put into use, it is usually necessary to perform channel matching on the power modules to check whether each power module is in the designated fixed channel. This ensures the safety and stability of the charging system during use and enables reasonable power distribution and transmission. Currently, the channel matching method for charging systems mainly involves determining the matching path based on the connection method of all power modules and the charging gun. Then, a single charging gun sequentially performs channel matching on the power modules according to the matching path. The entire matching process uses only one charging gun for testing. Only when this charging gun cannot complete the test will the next charging gun be switched for testing.

[0034] For example, if the charging system includes charging gun A, charging gun B, and charging gun C, and the power modules include modules 1 to 12 connected in sequence; during channel matching, charging gun A is first used to perform channel matching on modules 1 to 12 one by one. If charging gun A cannot complete channel matching when it detects module 8, then charging gun B is switched to perform channel matching. Charging gun B starts detecting from module 8 until all power modules have completed channel matching.

[0035] Therefore, the aforementioned one-to-one channel matching method has low matching efficiency, and the time spent on channel matching increases with the number of power modules. Furthermore, for multi-pile charging systems, if the connection method between power modules is complex (e.g., matrix connection), the difficulty and cost of detection will increase significantly. In addition, while each charging gun can independently detect the power modules, current methods only use one charging gun for detection, resulting in a waste of resources.

[0036] Based on this, embodiments of this application provide a charging system and its channel matching method and charging device. Through the designed channel matching logic, multiple matching starting points can simultaneously initiate channel matching, and the matching paths are complementary, which can greatly reduce the time spent on channel matching. Furthermore, the more power modules there are, the more time is saved, effectively solving the problems of low charging gun utilization and the increasing channel matching time with the number of power modules in existing methods.

[0037] For ease of understanding, this specification provides a scenario example of a channel matching method for a charging system, which is applied in situations such as... Figure 1 In the application environment shown, the scenario example includes at least two power modules 110, at least two charging terminals 120, a controller 130, and a switching unit 140.

[0038] In this scenario example, the switching unit 140, the controller 130, and each power module 110 constitute the AC / DC power conversion unit of the charging system, which is used to convert the AC power input from the grid into DC power and output the DC power to the electric vehicle being charged through the charging terminal 120.

[0039] The switching unit 140 can be a combination matrix of several switching devices (such as contactors, relays, etc.). The switching unit 140 is used to connect the power modules 110 in a preset connection method, thereby outputting different power to the charging terminal 120. For example, the preset connection method can be a matrix connection, a series connection, a star connection, etc. These power modules 110 can be combined and connected in various forms through switching devices. In this scenario example, any connection method can be selected to combine and connect all power modules 110. It is worth mentioning that the channel matching method of the charging system in this embodiment can be applied to any connection topology.

[0040] Furthermore, each power module 110 has a unique matching channel, meaning the position of each power module 110 is fixed. For example, the channels corresponding to power modules 1 to 12 are pre-set as channels 1 to 12, and each power module 110 needs to be in the designated channel so that the controller 130 can correctly call a power module 110 when needed. If power module 1 is in channel 2 and power module 2 is in channel 1, the controller 130 needs to control power module 1 to turn on and output the preset power. However, if power module 2 is actually turned on, it will cause an error in the charging system's power output, potentially leading to safety hazards. Therefore, before using the charging system, channel matching of each power module 110 is required to verify that each power module 110 is in the designated channel.

[0041] In this scenario example, each charging terminal 120 can be directly connected to a designated power module 110, and different charging terminals 120 can be directly connected to different power modules 110. The charging terminal 120 and the directly connected power module 110 can be connected through a switching device, or they can be directly connected by a wire.

[0042] Furthermore, the controller 130 can establish connections with each power module 110 and charging terminal 120 respectively to control the power module 110 and the charging terminal 120. In this scenario example, the controller 130 can simultaneously control at least two charging terminals 120 to detect the voltage output by the corresponding power module 110. The simultaneous detection by multiple charging terminals 120 can effectively improve channel matching efficiency.

[0043] Referring to the scenario examples of the channel matching method of the charging system in the foregoing embodiments, the channel matching method of the charging system in this application embodiment will be described in detail below.

[0044] Figure 2This is one of the flowcharts for a channel matching method in a charging system according to an embodiment of this application. The charging system in this embodiment includes at least two power modules, which are connected according to a preset connection method. The channel matching method of this charging system can be executed by the controller in the aforementioned scenario embodiment, such as... Figure 2 As shown, the channel matching method of this charging system may include the following steps:

[0045] Step 210: Based on the preset connection method of each power module, determine at least two target matching paths.

[0046] Step 220: Control the power modules on each target matching path to perform channel matching synchronously.

[0047] First, it should be noted that the preset connection method can be matrix connection, series connection, star connection, etc., and the connection topology of each power module is not limited here.

[0048] In this embodiment, the target matching path refers to the matching path adopted by the controller when performing channel matching for the first time. Based on the preset connection method between each power module, multiple matching paths may be generated. The final determined target matching path can be the optimal few matching paths among these matching paths, or it can be any few matching paths selected as the target matching path, or it can be all matching paths selected as the target matching path. No specific limitation is made here.

[0049] The preset connection methods between power modules differ, and the determined target matching paths will also differ; that is, the specific target matching path depends on the preset connection method. All power modules with a connection relationship can be on the same target matching path. Ultimately, it is possible that only some power modules are on the target matching path, or all power modules may be on the target matching path, depending on the preset connection method and the determined target matching path.

[0050] It should be noted that the channel matching process of the power module mainly involves the controller powering on the power module and outputting a preset voltage, then detecting the voltage of the corresponding channel. If the detected voltage matches the preset voltage, the channel matching is successful. During channel matching, if the charging device is an integrated charger, the host device can perform the channel voltage detection itself. In some implementations, the controller of the charging terminal (e.g., a charging gun) or other voltage sampling units can also perform the channel voltage detection. After detecting the voltage, the charging terminal or other voltage sampling units can feed it back to the host controller. The specific entity performing the voltage detection is not limited here.

[0051] Based on this, in this embodiment, the first power module (i.e., the starting point) in each target matching path can be selected as a power module that is directly connected to the charging terminal or other voltage sampling units, which makes it easier for the charging terminal or other voltage sampling units to perform detection.

[0052] Figure 3 The example demonstrates the default connection method for the first type of power module, such as... Figure 3 As shown, charging interface A is directly connected to power module 1, and power modules 1 through 9 are connected via relays in a grid matrix configuration. If only charging interface A is used to detect voltage, the target matching path could be: power module 1 – power module 2 – power module 3 – power module 6 – power module 5 – power module 4 – power module 7 – power module 8 – power module 9, or: power module 1 – power module 2 – power module 5 – power module 8, or: power module 1 – power module 4 – power module 5 – power module 8 – power module 9, etc. From the above target matching paths, it can be seen that some power modules may not be on the target matching path. Figure 3 In the connection topology shown, multiple target matching paths can also be determined. Any path that can be connected to power module 1 via a relay can be used as a target matching path, and the length of the target matching path is not limited.

[0053] In step 210, after each target matching path is determined, the controller can synchronously perform channel matching on the power modules along each target matching path. Thus, the controller first performs an overall channel matching process on each power module based on each target matching path. If any unmatched power modules remain after matching, channel matching can be performed on the unmatched power modules based on other matching paths.

[0054] As an example, continue to refer to Figure 3If charging terminal A and charging terminal B are used for channel voltage detection, the target matching path detected by charging terminal A is: power module 1 - power module 2 - power module 3 - power module 6, and the target matching path detected by charging terminal B is: power module 9 - power module 8 - power module 7 - power module 4 - power module 5. The controller can simultaneously control the power modules on the two target matching paths to perform channel matching, and charging terminal A and charging terminal B can simultaneously perform channel voltage detection. If voltage detection is performed sequentially using one charging terminal, it would take 9 * the matching time of a single power module. If the channel matching method provided in this embodiment is used, charging terminal A and charging terminal B start voltage detection simultaneously. Charging terminal A only needs to detect 4 power modules, and charging terminal B only needs to detect 5 power modules. Therefore, it only takes 5 * the matching time of a single power module, thus saving 44% of the time, effectively reducing the time spent on channel matching and improving the channel matching efficiency.

[0055] Ideally, the channel matching time of the channel matching method in this embodiment is the time spent matching each power module sequentially divided by the number of target matching paths. The more target matching paths are set, the more time is saved.

[0056] In some implementations, the target matching paths are complementary, such that any power module is located on at least one target matching path.

[0057] Understandably, multiple matching paths can be determined based on the connection topology between power modules. However, the time required for the entire channel matching process is minimized and the path is optimal when the determined target matching paths are complementary.

[0058] Figure 4 The example demonstrates the default connection method for the second type of power module, such as... Figure 4 As shown in the example, if charging terminals A, B, C, and D are used for channel voltage detection, the target matching path for detection of charging terminal A is: power module 1 - power module 2; the target matching path for detection of charging terminal B is: power module 4 - power module 5 - power module 6; the target matching path for detection of charging terminal C is: power module 12 - power module 11 - power module 10; and the target matching path for detection of charging terminal D is: power module 9 - power module 8 - power module 7. In the first round of channel matching, power module 3 will inevitably be undetectable. At this point, a second round of channel matching is required, which will take a relatively long time.

[0059] As another example, if the target matching path for charging terminal A is: Power Module 1 - Power Module 2 - Power Module 3, the target matching path for charging terminal B is: Power Module 4 - Power Module 5 - Power Module 6 - Power Module 7 - Power Module 8, the target matching path for charging terminal C is: Power Module 12 - Power Module 11 - Power Module 10, and the target matching path for charging terminal D is: Power Module 9, then since charging terminal B needs to detect 5 power modules, the entire matching process will take at least 5 times the time required to match a single power module.

[0060] As another example, if the target matching path for charging terminal A is: Power Module 1 – Power Module 2 – Power Module 3, the target matching path for charging terminal B is: Power Module 4 – Power Module 5 – Power Module 6, the target matching path for charging terminal C is: Power Module 12 – Power Module 11 – Power Module 10, and the target matching path for charging terminal D is: Power Module 9 – Power Module 8 – Power Module 7, each charging terminal needs to detect 3 power modules. Therefore, the entire matching process will take at least 3 times the time required to match a single power module. Compared to the previous two examples, this method, where the target matching paths are complementary, requires the least amount of time and saves the most time.

[0061] Therefore, multiple complementary target matching paths can be selected from all matching paths, and the complementary target matching paths can be used for the first round of channel matching. Since each power module is at least on one target matching path, most power modules can be detected in the first round of channel matching. Furthermore, since the target matching paths are complementary, the entire channel matching process takes the least amount of time and the path is optimal, thereby further improving the channel matching efficiency.

[0062] In some implementations, the charging system may further include at least two charging interfaces, each of which is directly connected to a corresponding designated power module; at least some of the target matching paths originate from the power module directly connected to the charging interface.

[0063] It should be noted that the charging port is used to provide power to the load. The charging port can be connected to a charging terminal, such as a charging gun; or the charging port can be directly connected to the load (which can be a battery) via a cable.

[0064] Furthermore, staff can assign directly connected power modules to each charging port according to actual needs. A certain number of power modules can be spaced out between each directly connected power module, and these spaced power modules can be equal. For example, if the charging system includes 3 charging ports and 9 power modules, then one power module can be assigned to each charging port every two power modules.

[0065] In this embodiment, the charging system may include several power modules and several charging interfaces. Before the charging system is put into use, the controller can call all (or some) of the currently online charging interfaces connected to the charging terminals to perform channel voltage detection. It should be noted that the charging terminals mentioned in the channel matching process in this embodiment refer to online charging terminals. Online charging terminals are those that have established a connection with the power cabinet so that the controller can communicate with these charging terminals to realize the channel matching control process.

[0066] If each charging port is connected to a charging terminal, and the channel voltage detection needs to be performed using the charging terminal's controller, then the starting point of some target matching paths can be the power module directly connected to the charging port. In this case, the charging terminal can start detection from the directly connected power module and proceed sequentially. If only the charging terminal's controller is used for channel voltage detection, then the starting point of all target matching paths can be the power module directly connected to the charging port.

[0067] As an example, if channel matching is performed using only two charging terminals and one voltage sampling unit for channel voltage detection, three target matching paths can be determined. The starting points of two of these target matching paths can be power modules directly connected to the charging terminals, and the starting point of the other target matching path can be power modules directly connected to the corresponding sampling point of the voltage sampling unit.

[0068] In some implementations, the number of target matching paths is greater than or equal to 2 and less than or equal to the number of charging ports. Specifically, the number of target matching paths must be two or more, and the number of target matching paths can be less than or equal to the number of charging ports.

[0069] As an example, if a charging system includes 5 charging ports, each connected to a charging terminal, and only 4 charging terminals are online, then you can choose to use only these 4 charging terminals for channel voltage detection. Each charging terminal corresponds to a target matching path, resulting in 4 target matching paths. Alternatively, you can choose to use 2 of the 4 charging terminals for channel voltage detection, with each charging terminal corresponding to a target matching path, resulting in 2 target matching paths.

[0070] In some implementations, the charging system may further include at least one sampling point, each sampling point being located away from the power module directly connected to each charging interface, and the starting point of at least part of the target matching path being the power module directly connected to the sampling point.

[0071] In this embodiment, multiple sampling points can be set between each power module. These sampling points are used for voltage sampling by the voltage sampling unit. It should be noted that the voltage sampling unit can be any device or circuit capable of acquiring voltage. For example, existing voltage sampling devices or circuits can be used. The structure of the voltage sampling unit will not be described in detail here.

[0072] In this embodiment, without adding additional charging interfaces, the number of target matching paths can be increased by increasing the number of output voltage sampling points within the charging system. Each voltage sampling unit can collect the output voltage of each sampling point to realize the channel matching process of the power module. In the actual channel matching process, each charging terminal and each voltage acquisition unit can work simultaneously, with the voltage acquisition unit added as a simulated charging terminal in the channel matching process, thereby further saving channel matching time. If, during the actual channel matching process, all charging terminals are offline or unable to detect voltage, channel voltage detection can also be performed by the voltage acquisition unit, ensuring that the matching process between the power module and the channel can be achieved normally under any circumstances.

[0073] Specifically, the host controller can control the power module to power on and output a preset voltage, and perform voltage sampling at the sampling point corresponding to the voltage sampling unit closest to the power module; after obtaining the voltage value, the voltage sampling unit will feed the obtained voltage value back to the host controller; the host controller will compare the collected voltage value with the preset voltage, and if the voltage value obtained by the voltage sampling unit is the same as the preset voltage, the channel matching result of the power module is determined to be a successful match.

[0074] In some implementations, sampling points can be set at locations that the charging terminal cannot detect quickly (i.e., far from the power modules directly connected to each charging interface). When each charging terminal and each voltage acquisition unit works simultaneously, the overall channel matching time can be saved.

[0075] Figure 5 This is a schematic diagram showing the sampling point locations of a specific example from this application. For example... Figure 5As shown in the example, if the target matching path for the detection of charging interface A is: power module 1 - power module 2 - power module 3 - power module 6 - power module 9, and the target matching path for the detection of charging interface B is: power module 8 - power module 7 - power module 4 - power module 5; it can be seen that power module 5 and power module 6 are both locations that the charging interface cannot detect quickly. Therefore, a sampling point can be set between power module 5 and power module 6, allowing the voltage sampling unit to perform channel matching for power module 5, power module 6, and power module 9, thereby further saving channel matching time.

[0076] Therefore, the embodiments of this application, through the complementary design of channel matching logic and target matching path, enable multiple charging terminals or voltage sampling units to simultaneously perform channel matching on each power module. This not only greatly reduces the channel matching time but also improves the utilization rate of the charging terminal. Moreover, the more power modules there are, the more time is saved, effectively solving the problems of low charging gun utilization and increased channel matching time with the increase of the number of power modules in the existing methods.

[0077] The channel matching process in the embodiments of this application will be described in detail below.

[0078] In some implementations, step 220, which controls the power modules of each target matching path to perform channel matching synchronously, may include: for any target matching path, starting from the starting point of the target matching path, controlling the power modules on the target matching path to perform channel matching sequentially until any power module in the target matching path fails to perform channel matching or all power modules on the target matching path successfully perform channel matching.

[0079] In this embodiment, the controller first synchronously controls the first power module of each target matching path to perform channel matching. Only when the first power module of the target matching path successfully completes channel matching will the controller perform channel matching for the remaining power modules on the path. It can be understood that if the first power module of the target matching path fails to match, it indicates that the channel position of the first power module is incorrect or that the power module itself is faulty. If the controller continues to control the remaining power modules on the target matching path to perform channel matching, the matching result will also be inaccurate. Therefore, to ensure the accuracy and efficiency of channel matching, in this embodiment, channel matching for the next power module on the target matching path will only be controlled after the first power module of the target matching path successfully completes channel matching.

[0080] Similarly, during the channel matching process for each power module on the target matching path, if a channel matching for a power module fails, the controller directly terminates the channel matching process for that target matching path. If the channel matching results for all power modules on the target matching path are successful, the channel matching process for that target matching path can also be terminated at this point.

[0081] Continue to refer to Figure 4 As an example, if only charging terminal A, charging terminal B, charging terminal C, and charging terminal D are used for channel voltage detection; where power module 1 directly connected to charging terminal A is the starting point of the corresponding target matching path, power module 4 directly connected to charging terminal B is the starting point of the corresponding target matching path, power module 9 directly connected to charging terminal D is the starting point of the corresponding target matching path, and power module 12 directly connected to charging terminal C is the starting point of the corresponding target matching path.

[0082] The controller can first simultaneously control the starting power modules of each target matching path to perform channel matching. If channel matching of power module 9 fails, the controller will only perform subsequent channel matching processes according to the target matching paths corresponding to charging terminal A, charging terminal B, and charging terminal C. If the target matching path corresponding to charging terminal B is power module 4-power module 5-power module 6, and the matching result obtained by charging terminal B for power module 5 is a matching failure, then charging terminal B will directly end the current channel matching process. If the target matching path corresponding to charging terminal A is power module 1-power module 2-power module 3, and the channel matching results of these three power modules are all successful, then charging terminal A will end the current channel matching process.

[0083] The following provides a detailed description of the specific channel matching process and results in the embodiments of this application.

[0084] In some implementations, the channel matching process includes: controlling the power module to output a preset voltage and controlling the detection voltage of the charging interface corresponding to the power module; controlling the power module to power on with the set voltage and determining the output sampling voltage of the power module; and determining the channel matching result of the power module based on the set voltage and the output sampling voltage of the power module.

[0085] It should be noted that the set voltage can be manually set by the staff, and no specific limitation is made here. Furthermore, the output sampling voltage of the power module is the sampling voltage of the corresponding channel of the power module. For example, if channel 1 corresponds to power module A, then the output sampling voltage of power module A is the sampling voltage of channel 1.

[0086] Taking the output sampling voltage detection of the charging terminal as an example, specifically, when the controller controls the power module to perform channel matching, the controller first controls the power module to turn on with a set voltage, and then the charging terminal detects the output sampling voltage of the original fixed channel corresponding to the power module. The charging terminal will feed back the detected voltage value to the controller, and the controller will then compare the voltage value detected by the charging terminal with the set voltage. If they are the same, it means that the power module is in the specified fixed channel and the power module has successfully matched with the channel; if they are different, it means that the power module is not in the specified fixed channel or the power module itself is faulty, and the power module has failed to match with the channel.

[0087] Continue to refer to Figure 4 Taking the charging terminal A and the target matching path "power module 1 - power module 2 - power module 3" as an example, the channel matching process of the power module is further introduced.

[0088] First, charging terminal A detects the output sampling voltage of power module 1, with channel 1 designated as the fixed channel. The controller disconnects the switching devices between power modules 1, 2, and 3, and powers module 1 with a voltage of 200V. Simultaneously, charging terminal A detects the output voltage of channel 1 and feeds the detected voltage value back to the controller. If the controller also receives a detected voltage of 200V, the channel matching result for power module 1 is considered successful.

[0089] Furthermore, charging terminal A detects the output sampling voltage of power module 2, with channel 2 designated as the fixed channel for power module 2. The controller controls the switching device between power module 1 and power module 2 to close, and controls the switching device between power module 2 and power module 3 to open, and controls power module 2 to power on with a voltage of 100V. Simultaneously, charging terminal A detects the output voltage of channel 2 and feeds the detected voltage value back to the controller. If the controller also receives a detected voltage of 100V, then the channel matching result of power module 2 is considered successful.

[0090] Finally, charging terminal A performs channel matching on power module 3, with channel 3 designated as the fixed channel. The controller closes all switches between power modules 1, 2, and 3, and powers module 3 with a voltage of 50V. Simultaneously, charging terminal A detects the output voltage of channel 3 and feeds the detected voltage value back to the controller. If the detected voltage received by the controller is not 50V, the channel matching result for power module 3 is considered a failure. This allows for the detection of the position and status of each power module.

[0091] In some implementations, step 220, which controls the power modules of each target matching path to perform channel matching synchronously, may also include: if the same power module is synchronously matched based on different target matching paths, then any one of the target matching paths is selected to continue the current matching process, and the matching process of other target matching paths that have already matched the current power module is terminated.

[0092] Taking the charging terminal's output sampling voltage detection as an example, specifically, when the controller simultaneously performs channel matching according to each target matching path, if the next power module to be detected by one charging terminal is the same as the next power module to be detected by another charging terminal, i.e., multiple charging terminals meet on the target matching path, the controller can control any one of these charging terminals to detect that power module and end the channel matching process for the remaining charging terminals' corresponding target matching paths. This avoids repeated channel matching of the same power module by different charging terminals, preventing resource waste; by eliminating this situation, the channel matching time for power modules can be further reduced.

[0093] Figure 6 The example demonstrates the default connection method for the third power module, such as... Figure 6 As shown, taking charging terminal A and charging terminal D as examples. If the target matching path for charging terminal A is: power module 1 - power module 2 - power module 8 - power module 7, and the target matching path for charging terminal D is: power module 9 - power module 10 - power module 8 - power module 7, then charging terminal A needs to detect power module 8 when it detects the third power module, and charging terminal D also needs to detect power module 8 when it detects the third power module. At this time, either charging terminal A or charging terminal D can be selected to perform output sampling voltage detection on power module 8. If charging terminal A is selected to perform output sampling voltage detection on power module 8, then charging terminal D will stop the current channel matching process. Ultimately, charging terminal A detects power modules 1, 2, 8, and 7, while charging terminal D detects power modules 9 and 10.

[0094] In some implementations, step 220, which controls each charging interface to synchronously perform channel matching on each power module according to the corresponding target matching path, may further include: for any power module located on at least two target matching paths, if the matching result of the power module's first channel matching is a matching failure, then other target matching paths containing the power module are selected to perform cross-verification on the power module; wherein, if the channel matching result of the power module is a matching failure in each cross-verification channel matching process, then the power module is determined to be a faulty module.

[0095] It should be noted that when designing the matching paths for each target, some overlap between the matching paths is permissible. (Reference) Figure 4 For example, the target matching path for charging terminal B can be: power module 4 - power module 5 - power module 6 - power module 7, and the target matching path for charging terminal D can be: power module 9 - power module 8 - power module 7 - power module 6. Then, both charging terminal B and charging terminal D can detect power module 7 and power module 6. In other words, when power module 7 fails to match for the first time, another charging terminal can cross-verify power module 7.

[0096] Specifically, if a power module is located on two or more different target matching paths, and the channel matching result of the power module is determined to be a failure after testing it using one of the charging terminals closest to it, then the power module can be cross-validated using other charging terminals. That is, other charging terminals can also test the power module once. If the channel matching result is a failure every time during the cross-validation process, the power module can be identified as a faulty module, and further channel matching attempts will not be made with it. If at least one channel matching result is a successful match during the cross-validation process, the power module is determined to be a normal power module.

[0097] Continue to refer to Figure 4 As an example, if the target matching path for charging terminal B is: power module 4 - power module 5 - power module 6 - power module 7 - power module 8 - power module 9, and the target matching path for charging terminal D is: power module 9 - power module 8 - power module 7 - power module 6 - power module 5 - power module 4; under normal circumstances, the controller controls the power modules on the two target matching paths to start channel matching simultaneously. After detecting three power modules, both charging terminals end the channel matching process. That is, charging terminal B detects: power module 4 - power module 5 - power module 6, and charging terminal D detects: power module 9 - power module 8 - power module 7.

[0098] However, if charging terminal B detects power module 5 and the channel matching result for power module 5 fails, then charging terminal B stops the channel matching process. After detecting power module 6, charging terminal D will perform cross-validation (i.e., perform one channel matching) on ​​power module 5. If the channel matching result for power module 5 by charging terminal D also fails, then power module 5 is determined to be a faulty module; if the channel matching result for power module 5 by charging terminal D is successful, then power module 5 is determined to be a normal module.

[0099] Figure 7This is a second flowchart of the channel matching method of the charging system according to an embodiment of this application, as shown below. Figure 7 As shown, in some embodiments, after step 220 controls the power modules of each target matching path to synchronously perform channel matching, the channel matching method of the charging system may further include the following steps:

[0100] Step 710: Based on the preset connection method of each power module, determine at least two preset matching paths.

[0101] Step 720: Determine the current status of each power module.

[0102] Step 730: For any power module, if the current state of the power module is unmatched or uncross-validated, then the power module is determined as the target power module.

[0103] Step 740: Traverse each preset matching path and control the target power module on the available preset matching path to perform channel matching until the preset conditions are met and the matching process ends.

[0104] In this context, power modules that have not undergone cross-validation are those with a unique target matching path and whose channel matching result is a failure. If all power modules preceding the target power module in the preset matching path are currently in a successfully matched and / or offline state, then the preset matching path is considered available. The preset conditions include that all power modules have undergone channel matching and / or cross-validation and / or have traversed all preset matching paths.

[0105] It should be noted that the current status of a power module can include: successful matching, offline, unmatched, no cross-validation, and failed matching. Specifically, if the charging interface performs channel matching on a power module and the result is a successful match, the controller will change the current status of the power module to successful matching; if multiple charging interfaces perform cross-validation on a power module and determine that the power module is a faulty module, the controller will change the current status of the power module to failed matching; if a power module has only undergone one channel matching and the matching failed, the controller will change the current status of the power module to no cross-validation; if a power module has not undergone channel matching, the current status of the power module is unmatched.

[0106] In this embodiment, multiple different preset matching paths can be set for each set starting point (e.g., a power module directly connected to the charging interface, a power module directly connected to the sampling point). The connection methods between the power modules differ, and the preset matching paths corresponding to each set starting point will also be different. The number of preset matching paths corresponding to each set starting point is also determined by the preset connection method; generally, the more complex the preset connection method, the more preset matching paths may be. It should be noted that the preset matching path is a matching path other than the target matching path.

[0107] In this embodiment, after the controller performs the first round of channel matching for each power module according to each target matching path, the state of most power modules will change. At this time, the controller can check whether there are any unmatched or uncross-validated power modules after the first round of channel matching by determining the current state of each power module. If so, the unmatched or uncross-validated power modules can be used as target power modules for the next round of channel matching. If not, the controller can directly output the channel matching results to user terminals, cloud platforms, etc., for staff to view.

[0108] It should be noted that the channel matching results output by the controller can include which power modules are faulty modules.

[0109] If the controller detects that there are still unmatched or uncross-validated power modules, the controller can use the preset matching paths corresponding to each set starting point to perform the next round of channel matching for each target power module; until there are no unmatched or uncross-validated power modules, or when all the preset matching paths corresponding to all set starting points have been searched and there are no more paths that can be used for matching, the channel matching process ends.

[0110] The following section details the process of channel matching for each target power module using the preset matching paths corresponding to each set starting point.

[0111] In this embodiment, each preset matching path for a given starting point can be stored in a channel matching table, with each set starting point corresponding to a channel matching table. When the controller performs channel matching on each target power module, it can traverse from the first preset matching path of the first set starting point to find a preset matching path that can be normally connected to the target power module.

[0112] Specifically, starting from the first preset matching path of the first set starting point, the current status of each power module on the current preset matching path is retrieved sequentially. When the current status of a power module is "matched successfully" or "offline," the status of subsequent power modules can be viewed, as power modules in the current "matched successfully" or "offline" state will not affect the channel matching of subsequent power modules. If, in the current preset matching path, besides the successfully matched power modules and the offline power modules, the first power module encountered has a "match failed" state, then the preset matching path is determined to be unavailable. The retrieval of the current preset matching path can be ended directly, and the process can switch to the next preset matching path or the preset matching path of the next set starting point.

[0113] If, within the current preset matching path, besides successfully matched power modules and offline power modules, the first power module encountered is currently in an unmatched or uncross-validated state (i.e., the target power module), then channel matching can be attempted for the target power module using the charging terminal or voltage sampling point unit corresponding to the current preset matching path. If the channel matching result is a successful match, the controller changes the current state of the target power module to a successful match; if the target power module is an unmatched power module and the channel matching result is a failed match, the controller changes the current state of the target power module to uncross-validated; if the target power module is an uncross-validated power module and the channel matching result is a failed match, the controller can either change the current state of the target power module to a failed match or leave the current state unchanged.

[0114] The channel matching process continues until there are no unmatched power modules or power modules that have not been cross-validated, or until all preset matching paths for the current starting point have been searched and there are no more paths available for matching.

[0115] Continue to refer to Figure 4As an example, if we take the power module directly connected to the charging terminal as the starting point, and power module 4 is a faulty module, while the current state of power module 6 is unmatched, then power module 6 can be used as the target power module for the next round of channel matching. If a preset matching path corresponding to charging terminal A is: power module 1 – power module 2 – power module 3 – power module 4 (faulty) – power module 5 – power module 6 (unmatched), then this preset matching path is unavailable, and charging terminal A cannot be used to detect power module 6. If a preset matching path corresponding to charging terminal D is: power module 9 – power module 8 – power module 7 – power module 6 (unmatched) – power module 5 – power module 4 (faulty), the unmatched power module 6 precedes the faulty power module 4, so this preset matching path is available, and charging terminal D can be used to detect power module 6.

[0116] Therefore, by utilizing the preset matching paths of each set starting point, channel matching is performed again on power modules that were not matched in the first round and power modules that have not been cross-validated, until all power modules are matched, thereby effectively improving the comprehensiveness of channel matching; and by cross-validating the power modules that failed to match, the accuracy of channel matching can be effectively improved.

[0117] Based on the above embodiments, this application also provides a channel matching device for a charging system. Figure 8 This is a schematic diagram of the channel matching device of the charging system according to an embodiment of this application. Figure 8 As shown, the channel matching device 800 of the charging system may include a path determination module 810 and a matching module 820, which are connected together.

[0118] The path determination module 810 is used to determine at least two target matching paths based on the preset connection method of each power module; the matching module 820 is used to control the power modules on each target matching path to perform channel matching synchronously.

[0119] In some implementations, the target matching paths are complementary, such that any of the power modules is located on at least one of the target matching paths.

[0120] In some embodiments, the charging system further includes at least two charging interfaces, each of which is directly connected to a corresponding designated power module; at least a portion of the target matching paths originate from the power module directly connected to the charging interface.

[0121] In some implementations, the number of target matching paths is greater than or equal to 2 and less than or equal to the number of charging ports.

[0122] In some embodiments, the charging system further includes at least one sampling point, each sampling point being located away from the power module directly connected to each of the charging interfaces, and at least a portion of the target matching path originating from the power module directly connected to the sampling point.

[0123] In some implementations, the matching module 820 is specifically used to: for any target matching path, starting from the starting point of the target matching path, sequentially control the power modules on the target matching path to perform channel matching, until any power module in the target matching path fails to perform channel matching or all power modules on the target matching path successfully perform channel matching.

[0124] In some implementations, the matching module 820 is further configured to: if the same power module is synchronously matched based on different target matching paths, select any one of the target matching paths to continue the current matching process and end the matching process of other target matching paths that have already matched the current power module.

[0125] In some implementations, the matching module 820 is further configured to: for any power module located on at least two of the target matching paths, if the matching result of the first channel matching of the power module is a matching failure, then select other target matching paths containing the power module to perform cross-validation on the power module; wherein, if the channel matching result of the power module is a matching failure in each channel matching process of cross-validation, then the power module is determined to be a faulty module.

[0126] In some embodiments, the matching module 820 is further specifically used for: determining at least two preset matching paths based on the preset connection methods of each power module; determining the current state of each power module; for any power module, if the current state of the power module is unmatched or uncross-validated, then the power module is determined as the target power module; wherein, the uncross-validated power module is a power module with a unique corresponding target matching path and a channel matching result of matching failure; traversing each preset matching path, and controlling the target power module on the available preset matching path to perform channel matching until a preset condition is met to end the matching process; wherein, if the current state of all power modules located before the target power module in the preset matching path is matching success and / or offline, then the preset matching path is determined to be available, and the preset condition includes all power modules having undergone channel matching and / or cross-validation and / or traversing all the preset matching paths.

[0127] In some implementations, the matching module 820 is further specifically used to: control the power module to power on at a set voltage and determine the output sampling voltage of the power module; and determine the channel matching result of the power module based on the set voltage and the output sampling voltage of the power module.

[0128] Therefore, the path determination module 810 determines at least two target matching paths based on the preset connection method of each power module, and the matching module 820 then controls the power modules on each target matching path to perform channel matching synchronously. The channel matching process of the power modules starts simultaneously from at least two starting points, which effectively improves the channel matching efficiency of the charging system and solves the problem of extended channel matching time caused by the increase in the number of power modules.

[0129] It should be noted that for details not disclosed in the channel matching device of the charging system in this embodiment, please refer to the details disclosed in the embodiments of the channel matching method of the charging system in this specification, which will not be repeated here.

[0130] Based on the above embodiments, this application also provides a charging device. The charging device includes a controller and at least two power modules, which are connected according to a preset connection method.

[0131] Figure 9 An example of a schematic diagram of the physical structure of a controller is shown, such as... Figure 9 As shown, the controller may include a processor 910, a communication interface 920, a memory 930, and a communication bus 940, wherein the processor 910, the communication interface 920, and the memory 930 communicate with each other through the communication bus 940. The processor 910 can call logic instructions in the memory 930 to execute a channel matching method for the charging system. This method includes: determining at least two target matching paths based on the preset connection methods of each power module; and controlling the power modules on each target matching path to synchronously perform channel matching.

[0132] Furthermore, the logical instructions in the aforementioned memory 930 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0133] Based on the above embodiments, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements a channel matching method for a charging system provided by the above methods. The method includes: determining at least two target matching paths based on a preset connection method of each power module; and controlling the power modules on each target matching path to synchronously perform channel matching.

[0134] Based on the above embodiments, the present invention also provides a charging system, including a charging device as described in the above embodiments and at least two charging terminals, wherein each power module in the charging device is connected to each other according to a preset connection method, and each charging terminal is directly connected to a corresponding designated power module.

[0135] The charging device is used to determine at least two target matching paths based on the preset connection method of each power module, and to control each power module to power on with a set voltage in sequence according to each target matching path; the charging terminal is used to determine the output sampling voltage of each power module and transmit the output sampling voltage to the charging device; the charging device is also used to determine the channel matching result of any power module based on the set voltage and the output sampling voltage of the power module.

[0136] In this embodiment, the charging interface can be connected to a charging terminal (e.g., a charging gun) or directly connected to a load (e.g., a battery). The charging terminal can be a terminal device with a charging gun, which can achieve DC fast charging in conjunction with a split DC charger host.

[0137] It should be noted that for details not disclosed in the charging system of this embodiment, please refer to the details disclosed in the embodiment of the channel matching method of the charging system in this specification, which will not be repeated here.

[0138] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0139] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of lane matching for a charging system, characterized by, The charging system comprises at least two power modules, at least two charging interfaces and at least one sampling point, each of the power modules is connected according to a preset connection mode, each of the charging interfaces is directly connected with a corresponding designated power module, and each of the sampling points is arranged away from the power module directly connected with the charging interface; the method comprises: Based on the preset connection mode of each of the power modules, at least two target matching paths are determined, each of the target matching paths is complementary, so that any of the power modules is located on at least one of the target matching paths, the starting point of at least part of the target matching paths is the power module directly connected with the charging interface, and the starting point of at least part of the target matching paths is the power module directly connected with the sampling point; The power modules on each of the target matching paths are controlled to synchronously perform channel matching, wherein the power modules on different target matching paths are synchronously detected by a host controller, or different charging terminals or different voltage sampling units; The control of the power modules on each of the target matching paths to synchronously perform channel matching comprises: If the same power module is synchronously matched based on different target matching paths, any of the target matching paths is selected to continue the current matching process, and the matching process of other target matching paths matched to the current power module is ended.

2. The channel matching method of the charging system according to claim 1, characterized by, The number of the target matching paths is greater than or equal to 2 and less than or equal to the number of the charging interfaces.

3. The channel matching method of the charging system according to claim 1, characterized by, The control of the power modules on each of the target matching paths to synchronously perform channel matching comprises: For any target matching path, the power modules on the target matching path are controlled to perform channel matching in sequence from the starting point of the target matching path, until any power module on the target matching path fails in channel matching or all the power modules on the target matching path are successfully matched in channel.

4. The channel matching method of the charging system according to claim 1, characterized by, The control of the power modules on each of the target matching paths to synchronously perform channel matching comprises: For any power module located on at least two target matching paths, if the matching result of the first channel matching of the power module is matching failure, the power module is cross-verified by the remaining target matching paths containing the power module; If the channel matching result of the power module is matching failure in each cross-verification channel matching process, the power module is determined as a fault module.

5. The channel matching method of the charging system according to claim 1, characterized by, The method further comprises: Based on the preset connection mode of each of the power modules, at least two preset matching paths are determined; The current state of each of the power modules is determined; For any power module, if the current state of the power module is unmatching or un-cross-verified, the power module is determined as a target power module; wherein the un-cross-verified power module is a power module having a unique corresponding target matching path and a matching failure channel matching result; The current state of each of the power modules is determined; The target power module on each of the preset matching paths is controlled to perform channel matching until a preset condition is met to end the matching process; wherein, if the current state of all power modules before the target power module in the preset matching path is matching success and / or offline state, the preset matching path is determined to be available, and the preset condition includes that all the power modules have performed channel matching and / or cross verification and / or traversed all the preset matching paths.

6. The channel matching method of a charging system according to Claim 1, wherein, The channel matching process includes: The power module is controlled to start up at a set voltage, and an output sampling voltage of the power module is determined; A channel matching result of the power module is determined based on the set voltage and the output sampling voltage of the power module.

7. A charging device comprising a controller and at least two power modules, each of the power modules being connected according to a preset connection mode; The controller comprises a memory and a processor, and a computer program is stored on the memory, characterized in that, The processor, when executing the computer program, implements the channel matching method of the charging system according to any one of claims 1 to 6.

8. A charging system, characterized by The charging device according to claim 7 and at least two charging terminals, each of the power modules in the charging device being connected according to a preset connection mode, and each of the charging terminals being directly connected to a corresponding designated power module; The charging device is configured to determine at least two target matching paths based on the preset connection mode of each of the power modules, and control each of the power modules to start up at a set voltage according to each of the target matching paths; The charging terminal is configured to determine an output sampling voltage of each of the power modules, and transmit the output sampling voltage to the charging device; The charging device is further configured to determine, for any power module, a channel matching result of the power module based on the set voltage and the output sampling voltage of the power module.

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