Charging system, channel matching method thereof and charging equipment

Abstract

The invention discloses a charging system, a channel matching method thereof and charging equipment, 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 a preset connection mode of each power module; and controlling the power modules on the target matching paths to perform channel matching synchronously. Therefore, the channel matching efficiency of the charging system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicle charging, and in particular to a charging system and a channel matching method and a charging device. Background Art

[0002] In a multi-pile group charging system, multiple charging guns are connected to the power grid through a DC power cabinet to provide charging services for electric vehicles at the same time. In order to ensure the efficiency and stability of the charging process, before using the charging system, it is necessary to match the channels of each power module in the charging system to determine whether each power module is in the specified channel.

[0003] The current channel matching method of the multi-pile group charging system is mainly: use a charging gun to perform channel matching detection on all power modules one by one. When this gun cannot complete the detection, it switches to the next gun for detection. 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; and 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 purpose of the present application is to provide a charging system and a channel matching method and a charging device thereof, so as to improve the channel matching efficiency of the charging system.

[0005] To achieve the above object, the present application provides a channel matching method of a charging system, wherein the charging system includes at least two power modules, and the power modules are connected in a preset connection mode; the method includes:

[0006] Based on the preset connection mode of each of the power modules, determining at least two target matching paths;

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

[0008] Optionally, the target matching paths are complementary, so that any one 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; and the starting point of at least part of the target matching path is a power module directly connected to the charging interface.

[0010] Optionally, 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.

[0011] Optionally, the charging system further includes at least one sampling point, each of the sampling points is respectively arranged at a location far away from a power module directly connected to each of the charging interfaces, and the starting point of at least part of the target matching path is a power module directly connected to the sampling point.

[0012] Optionally, the power modules of each target matching path are controlled to synchronously perform channel matching, including: 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 the channel matching of any power module in the target matching path fails or the channel matching of all the power modules on the target matching path succeeds.

[0013] Optionally, the power modules controlling each of the target matching paths synchronously perform channel matching, including: if the same power module is synchronously matched based on different target matching paths, 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 been matched to the current power module is ended.

[0014] Optionally, the power modules of the control target matching paths are synchronously channel matched, including: 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 the remaining target matching paths containing the power module are selected to cross-validate the power module; wherein, if the channel matching result of the power module is a matching failure in each cross-validation channel matching process, the power module is determined to be a faulty module.

[0015] Optionally, the method also includes: determining at least two preset matching paths based on the preset connection mode of each of the power modules; determining the current state of each of the power modules; for any power module, if the current state of the power module is unmatched or not cross-validated, determining the power module as a target power module; wherein the uncross-validated power module is a power module having a unique corresponding target matching path and a channel matching result of a matching failure; traversing each of the preset matching paths, and controlling the target power modules on the available preset matching paths to perform channel matching until the preset conditions are 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 a successful match and / or an offline state, then determining that the preset matching path is available, and the preset conditions include that all of the power modules have undergone channel matching and / or cross-validation and / or traversed all of the preset matching paths.

[0016] Optionally, the channel matching process includes: controlling the power module to start up with a set voltage and determining an output sampling voltage of the power module; and determining a 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-mentioned purpose, the present application also provides a charging device, including a controller and at least two power modules, and each of the power modules is connected according to a preset connection method; the controller includes a memory and a processor, and a computer program is stored in the memory. When the processor executes the computer program, it implements the channel matching method of the charging system as described in any one of the above items.

[0018] The present application also provides a charging system, comprising a charging device as described above and at least two charging terminals, wherein 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 control each power module to start up with a set voltage in sequence according to each target matching path; the charging terminal is used to determine the output sampling voltage corresponding to 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 of the present application determines at least two target matching paths based on the preset connection mode of each power module, and then controls the power modules on each target matching path to synchronously perform channel matching. Thus, the channel matching process of the power module starts from at least two starting points simultaneously, effectively improving the channel matching efficiency of the charging system and solving the problem of prolonged channel matching time caused by an increase in the number of power modules. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 is one of the flow charts of the channel matching method of the charging system according to an embodiment of the present application;

[0022] Figure 3 The first type of preset connection method of the power module is illustrated;

[0023] Figure 4 The second type of preset connection method of the power module is illustrated;

[0024] Figure 5is a schematic diagram of the sampling point locations of a specific example of the present application;

[0025] Figure 6 The third preset connection mode of the power module is illustrated;

[0026] Figure 7 This is the second flow chart of the channel matching method of the charging system according to the embodiment of the present application;

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

[0028] Fig. 9 An example of a physical structure diagram of a controller is shown;

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

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

[0031] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] With the popularity of electric vehicles, the demand for charging infrastructure is increasing. In a multi-pile group charging system, multiple charging guns are connected to the power grid through a DC power cabinet to provide charging services for multiple electric vehicles at the same time.

[0033] However, before the charging system is put into use, it is usually necessary to perform channel matching on the power modules of the charging system to detect whether each power module is in a specified fixed channel, so as to ensure the safety and stability of the charging system during use and realize the reasonable distribution and transmission of power. At present, the channel matching method of the charging system is mainly as follows: determine the matching path according to the connection method of all power modules and charging guns, and then use a charging gun to match the channels of the power modules in turn according to the matching path. The entire matching process always uses only one charging gun for detection. When this charging gun cannot complete the detection, it will switch to the next charging gun for detection.

[0034] For example, if the charging system includes charging guns A, B, and C, and the power modules include modules 1 to 12 connected in sequence, when performing channel matching, first use charging gun A to perform channel matching on modules 1 to 12 one by one. If charging gun A cannot complete channel matching when detecting module 8, then switch to charging gun B for channel matching, and charging gun B starts detecting from module 8 until all power modules complete channel matching.

[0035] Therefore, the above-mentioned channel matching method has low matching efficiency, and the time spent on channel matching increases with the increase in the number of power modules; and for a charging system with multiple charging piles, if the connection method between the power modules is more complicated (for example, a matrix connection method), the difficulty and cost of detection will increase significantly. In addition, each charging gun can independently detect the power module, but the existing methods only use one charging gun for detection, resulting in a waste of resources.

[0036] Based on this, the embodiment of the present application provides a charging system and its channel matching method and charging device. Through the designed channel matching logic, multiple matching starting points are used to start channel matching at the same time, and each matching path is complementary, which can greatly reduce the time spent on channel matching. The more power modules there are, the more time is saved, which effectively solves the problem of low charging gun utilization and the increase in channel matching time as the number of power modules increases in the existing method.

[0037] For ease of understanding, this specification provides a scenario example of a channel matching method for a charging system. The scenario example is applied in the following example: 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 switch unit 140 .

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

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

[0040] In addition, each power module 110 has a unique matching channel, that is, the position of the power module 110 is fixed. For example, the channels corresponding to power modules 1 to 12 are pre-set as channels 1 to 12, respectively, and each power module 110 needs to be at a specified channel, so that when the controller 130 needs to call a certain power module 110, it can be called correctly. Assume that power module 1 is at channel 2, and power module 2 is at channel 1. At this time, the controller 130 needs to control power module 1 to turn on and output the preset power, but power module 2 is actually turned on, which will cause power output errors in the charging system, and in serious cases, it will cause safety hazards. Therefore, before the charging system is used, it is necessary to perform channel matching on each power module 110 to verify whether each power module 110 is at a specified 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 are directly connected to different power modules 110. The charging terminal 120 and the directly connected power module 110 can be connected through a switch device, or the charging terminal 120 and the power module 110 can be directly connected by a wire.

[0042] Furthermore, the controller 130 can establish connection relationships 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, and multiple charging terminals 120 perform detection at the same time, which can effectively improve the channel matching efficiency.

[0043] With reference to the scenario example of the channel matching method of the charging system in the aforementioned embodiment, the channel matching method of the charging system in the embodiment of the present application is described in detail below.

[0044] Figure 2The charging system of this embodiment includes at least two power modules, each of which is connected in a preset connection mode. The channel matching method of the charging system can be executed by the controller in the above-mentioned scenario embodiment, such as Figure 2 As shown, the channel matching method of the charging system may include the following steps:

[0045] Step 210: Determine at least two target matching paths based on the preset connection mode of each power module.

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

[0047] First, it should be noted that the preset connection mode may be a matrix connection mode, a series connection mode, a star connection mode, 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 used by the controller when performing channel matching for the first time. Based on the preset connection mode between the power modules, it is possible to generate multiple matching paths, and the target matching path finally determined can be the best matching paths among these matching paths, or several matching paths can be selected as the target matching path, or all matching paths can be selected as the target matching path, which is not specifically limited here.

[0049] The preset connection methods between the power modules are different, and the determined target matching paths will also be different, that is, the specific target matching path depends on the preset connection method; as long as the power modules have a connection relationship, they can be on the same target matching path. In the end, only some power modules may be on the target matching path, or all power modules may be on the target matching path, which depends on the preset connection method and the determined target matching path.

[0050] It should be noted that the process of channel matching of the power module is mainly as follows: the controller controls the power module to start up and output a preset voltage, and then detects the voltage of the corresponding channel. If the detected voltage is the same as the preset voltage, the channel matching is successful. During the channel matching process, if the charging device is an integrated charger, the host can complete the channel voltage detection by itself; in some embodiments, the channel voltage detection can also be completed by the controller of the charging terminal (such as a charging gun) or other voltage sampling units. After the charging terminal or other voltage sampling units detect the voltage, the detected voltage can be fed back to the host controller. The execution subject of the voltage detection is not specifically limited here.

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

[0052] Figure 3 The following example shows the preset connection method of the first power module. Figure 3 As shown, charging interface A is directly connected to power module 1, and power modules 1 to 9 are connected through relays in the form of a grid matrix. If only charging interface A is used to detect voltage, the target matching path can 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. It can be seen from the above target matching path 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 the power module 1 through 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 on each target matching path according to each target matching path. Thus, the controller first performs an overall channel matching process on each power module according to each target matching path. If there are unmatched power modules 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 3, if charging terminal A and charging terminal B are used to detect the voltage of the channel, 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 control the power modules on the two target matching paths to perform channel matching according to the two target matching paths, and charging terminal A and charging terminal B perform channel voltage detection at the same time. If a charging terminal is used to perform voltage detection in sequence, it will take 9*single power module matching time; if the channel matching method provided in this embodiment is adopted, charging terminal A and charging terminal B start voltage detection at the same time, charging terminal A only needs to detect 4 power modules, and charging terminal B only needs to detect 5 power modules, so it only takes 5*single power module matching time in the end, thereby saving 44% of the time, thereby effectively reducing the time spent on channel matching and improving channel matching efficiency.

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

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

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

[0058] Figure 4 The second power module preset connection method is shown as an example. Figure 4 As shown, as an example, if charging terminal A, charging terminal B, charging terminal C and charging terminal D are used to perform channel voltage detection, the target matching path corresponding to the detection of charging terminal A is: power module 1-power module 2, the target matching path corresponding to the detection of charging terminal B is: power module 4-power module 5-power module 6, the target matching path corresponding to the detection of charging terminal C is: power module 12-power module 11-power module 10, and the target matching path corresponding to the 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 must be unable to be detected. At this time, a second round of channel matching process is required, so the time spent will be relatively long.

[0059] As another example, if the target matching path detected by charging terminal A is: power module 1-power module 2-power module 3, the target matching path detected by charging terminal B is: power module 4-power module 5-power module 6-power module 7-power module 8, the target matching path detected by charging terminal C is: power module 12-power module 11-power module 10, and the target matching path detected by charging terminal D is: power module 9. Since charging terminal B needs to detect 5 power modules, the entire matching process takes at least 5* the matching time of a single power module.

[0060] As another example, if the target matching path detected by charging terminal A is: power module 1-power module 2-power module 3, the target matching path detected by charging terminal B is: power module 4-power module 5-power module 6, the target matching path detected by charging terminal C is: power module 12-power module 11-power module 10, and the target matching path detected by charging terminal D is: power module 9-power module 8-power module 7. Each charging terminal needs to detect 3 power modules, so the entire matching process takes at least 3*single power module matching time. Compared with the previous two examples, this case where the target matching paths are complementary takes the least time and saves the most time.

[0061] Therefore, multiple complementary target matching paths can be selected from all matching paths, so that the first round of channel matching can be performed using the complementary target matching paths. Because each power module is on at least one target matching path, most of the power modules can be detected in the first round of channel matching, and the target matching paths are complementary. The entire channel matching process takes the least time and has the optimal path, thereby further improving the channel matching efficiency.

[0062] In some embodiments, the charging system may further include at least two charging interfaces, each of which is directly connected to a corresponding designated power module; the starting point of at least part of the target matching path is a power module directly connected to the charging interface.

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

[0064] In addition, the staff can specify a directly connected power module for each charging interface according to actual needs. A certain number of power modules can be spaced between the power modules directly connected to each charging interface, and the number of spaced power modules can be equal. For example, if the charging system includes 3 charging interfaces and 9 power modules, a power module directly connected to the charging interface can be specified for 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 may call all (or part of) the charging terminals currently connected to the online charging interfaces to perform channel voltage detection. It should be noted here that the charging terminals described in the channel matching process in the embodiment of the present application all refer to online charging terminals, and online charging terminals refer to charging terminals 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 interface is connected to a charging terminal and the controller of the charging terminal is required to detect the channel voltage, the starting point of some target matching paths can be the power module directly connected to the charging interface. In this way, the charging terminal can start from the power module directly connected to it and perform detection in sequence. If only the controller of the charging terminal is used for channel voltage detection, the starting point of all target matching paths can be the power module directly connected to the charging interface.

[0067] As an example, if only two charging terminals and one voltage sampling unit are used to perform channel voltage detection during channel matching, three target matching paths can be determined, among which the starting points of two target matching paths can be power modules directly connected to the charging terminals, and the starting point of another target matching path can be a power module directly connected to the sampling point corresponding to the voltage sampling unit.

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

[0069] As an example, if the charging system includes 5 charging interfaces, each of which is connected to a charging terminal, and only 4 of them are online. At this time, you can choose to use only these 4 charging terminals to detect the voltage of the channel, and each charging terminal corresponds to a target matching path, so the number of target matching paths is 4. You can also choose to use 2 of the above 4 charging terminals to detect the voltage of the channel, and each charging terminal corresponds to a target matching path, so the number of target matching paths is 2.

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

[0071] In this embodiment, multiple sampling points can be set between each power module, and the sampling points are used for the voltage sampling unit to perform voltage sampling. It should be noted that the voltage sampling unit can be any device or circuit capable of collecting voltage, for example, the currently existing voltage sampling device or voltage sampling circuit can be used, and the structure of the voltage sampling unit is not introduced 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 inside the charging system. Each voltage sampling unit can implement the channel matching process of the power module by collecting the output voltage of each sampling point. In the actual channel matching process, each charging terminal and each voltage acquisition unit can work at the same time, and the voltage acquisition unit is added to the channel matching process as a simulated charging terminal, so as to further save the channel matching time. If in the actual channel matching process, all charging terminals are not online or cannot detect voltage, the channel voltage detection can also be performed through the voltage acquisition unit, so as to ensure that the matching process of the power module and the channel can be implemented normally under any circumstances.

[0073] Specifically, the host controller can control the power module to start up 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 back the obtained voltage value to the host controller; the host controller compares the collected voltage value with the preset voltage. If the voltage value sampled 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 embodiments, the sampling point can be set at a position that the charging terminal cannot detect quickly (i.e., far away from the power module directly connected to each charging interface). When each charging terminal and each voltage acquisition unit works at the same time, the overall channel matching time can be saved.

[0075] Figure 5 FIG. 1 is a schematic diagram of the sampling point locations of a specific example of this application. Figure 5As shown, as an example, if the target matching path corresponding to the detection of charging interface A is: power module 1-power module 2-power module 3-power module 6-power module 9, the target matching path corresponding to 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 positions that cannot be quickly detected by the charging interface, then a sampling point can be set between power module 5 and power module 6, so that the voltage sampling unit can perform channel matching on power module 5, power module 6, and power module 9, thereby further saving channel matching time.

[0076] Therefore, the embodiments of the present application complement the designed channel matching logic and target matching paths, so that multiple charging terminals or voltage sampling units can simultaneously perform channel matching on each power module, which not only greatly reduces the channel matching time, but also improves the utilization rate of the charging terminal. The more power modules there are, the more time is saved, which effectively solves the problem of low utilization rate of charging guns and increasing channel matching time with the increase in the number of power modules in the existing method.

[0077] The channel matching process in the embodiment of the present application is described in detail below.

[0078] In some embodiments, step 220 controls the power modules of each target matching path to synchronously perform channel matching, which may include: 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 the channel matching of any power module in the target matching path fails or all the power modules on the target matching path succeed in channel matching.

[0079] In this embodiment, the controller will first synchronously control the first power module of each target matching path to perform channel matching. When the channel matching of the first power module of the target matching path is successful, the controller will perform channel matching on the remaining power modules on the path according to the target matching path. It can be understood that if the first power module of the target matching path fails to match, it means that the channel position of the first power module of the target matching path is wrong or the power module itself fails. If the remaining power modules on the target matching path continue to be controlled for channel matching, the matching result is also inaccurate. Therefore, in order to ensure the accuracy and matching efficiency of channel matching, in this embodiment, only when the channel matching of the first power module of the target matching path is successful, will the control continue to perform channel matching on the next power module of the target matching path.

[0080] Similarly, during the channel matching process of each power module on the target matching path, if a power module fails to match the channel, the controller directly ends the channel matching process corresponding to the target matching path. If the channel matching results of all power modules on the target matching path are successful, the channel matching process corresponding to the target matching path can also be ended at this time.

[0081] Continue to refer Figure 4 As an example, if only charging terminal A, charging terminal B, charging terminal C and charging terminal D are used to perform channel voltage detection; among them, 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 the channel matching of power module 9 fails, the controller only performs the subsequent channel matching process 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 channel matching of power module 5 is a matching failure, charging terminal B directly ends 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, charging terminal A ends the current channel matching process.

[0083] The specific channel matching process and channel matching results of the embodiment of the present application are introduced in detail below.

[0084] In some embodiments, the channel matching process includes: controlling the power module to output a preset voltage, and controlling the charging interface detection voltage corresponding to the power module; controlling the power module to start up with 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.

[0085] It should be noted that the set voltage can be manually set by the staff, and the set voltage is not specifically limited here. In addition, the output sampling voltage of the power module is the sampling voltage of the corresponding channel of the power module. For example, the channel corresponding to power module A is channel 1, and the output sampling voltage of power module A is the sampling voltage of channel 1.

[0086] Taking the detection of the output sampling voltage by 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 start up with the set voltage, and then detects the output sampling voltage of the original fixed channel corresponding to the power module through the charging terminal. The charging terminal will feed back the detected voltage value to the controller, and the controller will compare the voltage value detected by the charging terminal with the set voltage. If they are the same, it indicates that the power module is at the specified fixed channel and the power module is successfully matched with the channel; if they are different, it indicates that the power module is not at the specified fixed channel or the power module itself has a fault, and the power module fails to match the channel.

[0087] Continue to refer Figure 4 , taking 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, and the fixed channel specified by power module 1 is channel 1. The controller controls the switch devices between power module 1, power module 2 and power module 3 to be disconnected, and controls power module 1 to start up with a voltage of 200V; at the same time, charging terminal A detects the output voltage of channel 1, and charging terminal A feeds back the detected voltage value to the controller. If the detection voltage received by the controller is also 200V, the channel matching result of power module 1 is a successful match.

[0089] Furthermore, charging terminal A detects the output sampling voltage of power module 2, and the fixed channel specified by power module 2 is channel 2. The controller controls the switch device between power module 1 and power module 2 to close, controls the switch device between power module 2 and power module 3 to open, and controls power module 2 to start up with a voltage of 100V; at the same time, charging terminal A detects the output voltage of channel 2, and charging terminal A feeds back the detected voltage value to the controller. If the detection voltage received by the controller is also 100V, the channel matching result of power module 2 is a successful match.

[0090] Finally, charging terminal A performs channel matching on power module 3, and the fixed channel specified by power module 3 is channel 3. The controller controls the switch devices between power module 1, power module 2 and power module 3 to be closed, and controls power module 3 to start up at a voltage of 50V; at the same time, charging terminal A detects the output voltage of channel 3, and charging terminal A feeds back the detected voltage value to the controller. If the detection voltage received by the controller is not 50V, the channel matching result of power module 3 is a matching failure. In this way, the position and status of each power module can be detected.

[0091] In some embodiments, step 220 controls the power modules of each target matching path to synchronously perform channel matching, and may also include: if the same power module is synchronously matched based on different target matching paths, 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 been matched to the current power module is ended.

[0092] Still taking the detection of the output sampling voltage of the charging terminal as an example, specifically, when the controller performs channel matching according to each target matching path at the same time, if the next power module to be detected by a charging terminal is the same as the next power module to be detected by another charging terminal, that is, multiple charging terminals meet on the target matching path, in this case, the controller can control any one of these charging terminals to detect the power module and end the channel matching process of the corresponding target matching path of the remaining charging terminals. This can avoid repeated channel matching of the same power module by different charging terminals, resulting in a waste of resources; by eliminating this situation, the channel matching time of the power module can be further saved.

[0093] Figure 6 The third power module preset connection method is illustrated. Figure 6 As shown, take charging terminal A and charging terminal D as examples. If the target matching path corresponding to charging terminal A is: power module 1-power module 2-power module 8-power module 7, and the target matching path corresponding to charging terminal D is: power module 9-power module 10-power module 8-power module 7, charging terminal A needs to detect power module 8 when detecting the third power module, and charging terminal D also needs to detect power module 8 when detecting the third power module. At this time, 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, charging terminal D will stop the current channel matching process. In the end, the power modules detected by charging terminal A are power module 1, power module 2, power module 8 and power module 7, and the power modules detected by charging terminal D are power module 9 and power module 10.

[0094] In some embodiments, step 220 controls each charging port to synchronously perform channel matching on each power module according to the corresponding target matching path, and may also include: 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 a matching failure, then selecting the remaining target matching paths containing the power module to cross-validate 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.

[0095] It should be noted that when designing each target matching path, some target matching paths may have certain intersections. Figure 4 For example, the target matching path corresponding to charging terminal B can be: power module 4 - power module 5 - power module 6 - power module 7, and the target matching path corresponding to 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; that is, 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 after using one of the charging terminals closest to the power module to detect the power module, it is determined that the channel matching result of the power module is a matching failure, then the remaining charging terminals can be used to cross-validate the power module, that is, the remaining charging terminals can also perform a detection on the power module. If the result of each channel matching during the cross-validation process is a matching failure, the power module can be determined as a faulty module, and no subsequent attempts to perform channel matching on the power module will be made; if at least one channel matching result during the cross-validation process is a matching success, the power module is determined to be a normal power module.

[0097] Continue to refer Figure 4 As an example, if the target matching path corresponding to 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 corresponding to 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 at the same time, and the two charging terminals end the channel matching process after detecting the three power modules, 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 the channel matching result of power module 5 is a match failure when charging terminal B detects power module 5, then charging terminal B stops the channel matching process; and charging terminal D will perform a cross-verification (i.e., a channel matching) on ​​power module 5 after detecting power module 6. If the result of channel matching of power module 5 by charging terminal D is still a match failure, power module 5 is determined to be a faulty module; if the result of channel matching of power module 5 by charging terminal D is a match success, power module 5 is determined to be a normal module.

[0099] Figure 7This is a second flow chart of the channel matching method of the charging system of the embodiment of the present application. Figure 7 As shown, in some embodiments, after controlling the power modules of each target matching path to synchronously perform channel matching in step 220, the channel matching method of the charging system may further include the following steps:

[0100] Step 710: Determine at least two preset matching paths based on the preset connection mode of each power module.

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

[0102] Step 730: For any power module, if the current status of the power module is unmatched or not cross-verified, the power module is determined as a 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 condition is met to end the matching process.

[0104] Among them, the power module that has not been cross-validated is a power module that has a unique corresponding target matching path and the channel matching result is a matching failure. If the current status of all power modules located before the target power module in the preset matching path is a matching success and / or an offline state, it is determined that the preset matching path is available. The preset conditions include that all power modules have undergone channel matching and / or cross-validation and / or traversed all preset matching paths.

[0105] It should be noted that the current state of the power module may include: successful matching, offline state, unmatched, uncross-validated, and unmatched. Among them, if the result of the charging interface performing channel matching on a power module is a successful matching, the controller will modify the current state of the power module to a 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 modify the current state of the power module to a failed matching; if a power module has only undergone one channel matching and the matching failed, the controller will modify the current state of the power module to uncross-validated; if a power module has not undergone channel matching, the current state of the power module is unmatched.

[0106] In this embodiment, a plurality of different preset matching paths can be set for each set starting point (for example, 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 are different, and the preset matching paths corresponding to the set starting points 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 there may be. It should be noted that the preset matching paths are other matching paths other than the target matching paths.

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

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

[0109] If the controller detects that there are power modules that have not been matched or cross-validated, the controller can use the preset matching paths corresponding to each set starting point to perform the next round of channel matching on each target power module; until there are no unmatched power modules and power modules that have not been cross-validated, or all the preset matching paths corresponding to all the current set starting points have been retrieved and there are no more paths that can be used for matching, the channel matching process ends.

[0110] The following is a detailed description of the process of performing channel matching on each target power module using the preset matching paths corresponding to each set starting point.

[0111] In the embodiment of the present application, each preset matching path of the set starting point can be stored in a channel matching table, and each set starting point corresponds to a channel matching table. When the controller performs channel matching on each target power module, the controller can start traversing 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 in turn. When the current status of a power module is a match passed or an offline status, the status of the power modules after it can continue to be checked, because the power modules whose current status is a match passed or an offline status will not affect the channel matching of subsequent power modules. If in the current preset matching path, except for the successfully matched power modules and the power modules in the offline status, the current status of the first power module encountered is a match failed, it is determined that the preset matching path is unavailable, and the retrieval of the current preset matching path can be ended directly, and the next preset matching path or the preset matching path of the next set starting point can be switched to.

[0113] If in the current preset matching path, except for the successfully matched power modules and the power modules in the offline state, the current state of the first power module encountered is unmatched or not cross-validated (i.e., the target power module), then the charging terminal or voltage sampling point unit corresponding to the current preset matching path can be used to try to perform channel matching on the target power module. If the result of the channel matching is a successful match, the controller modifies the current state of the target power module to a successful match; if the target power module is an unmatched power module and the result of the channel matching is a failed match, the controller modifies the current state of the target power module to a non-cross-validated state; if the target power module is a non-cross-validated power module and the result of the channel matching is a failed match, the controller can modify the current state of the target power module to a failed match or not modify the current state.

[0114] The channel matching process is terminated by continuously repeating the above traversal matching process until there are no unmatched power modules and no cross-validated power modules, or all preset matching paths of the current set starting points have been retrieved and there are no more paths that can be used for matching.

[0115] Continue to refer Figure 4As an example, if the power module directly connected to the charging terminal is used as the setting starting point, and power module 4 is a faulty module, and the current state of power module 6 is unmatched, 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 (fault)-power module 5-power module 6 (unmatched), then this preset matching path is not available, 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 (fault), the unmatched power module 6 is before 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 the power modules that have not been matched in the first round and the 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 have failed to match, the accuracy of channel matching can be effectively improved.

[0117] Based on the above embodiments, the present application also provides a channel matching device for a charging system. Figure 8 Schematic diagram of a channel matching device of a charging system according to an embodiment of the present 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 , and the path determination module 810 and the matching module 820 are connected.

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

[0119] In some implementations, the target matching paths are complementary, so that any one 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; and the starting point of at least part of the target matching path is a power module directly connected to the charging interface.

[0121] In some implementations, 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 ports.

[0122] In some embodiments, the charging system further includes at least one sampling point, each of the sampling points being respectively arranged at a location away from a power module directly connected to each of the charging interfaces, and the starting point of at least part of the target matching path is a power module directly connected to the sampling point.

[0123] In some embodiments, 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 the channel matching of any power module in the target matching path fails or the channel matching of all the power modules on the target matching path succeeds.

[0124] In some embodiments, the matching module 820 is also specifically used 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 been matched to the current power module.

[0125] In some embodiments, the matching module 820 is also specifically used for: 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 selecting the remaining target matching paths containing the power module to cross-validate 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.

[0126] In some embodiments, the matching module 820 is also specifically used to: determine at least two preset matching paths based on the preset connection mode of each of the power modules; determine the current state of each of the power modules; for any power module, if the current state of the power module is unmatched or not cross-validated, determine the power module 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 a matching failure; traverse each of the preset matching paths, and control the target power modules on the available preset matching paths to perform channel matching until the preset conditions are 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 a successful match and / or offline state, it is determined that the preset matching path is available, and the preset conditions include that all of the power modules have undergone channel matching and / or cross-validation and / or traversed all of the preset matching paths.

[0127] In some embodiments, the matching module 820 is further specifically used to: control the power module to start up with 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 synchronously perform channel matching. The channel matching process of the power module starts from at least two starting points at the same time, 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 of this embodiment, please refer to the details disclosed in the embodiment of the channel matching method of the charging system in the embodiment of this specification, which will not be repeated here.

[0130] Based on the above embodiment, the embodiment of the present application further provides a charging device, which includes a controller and at least two power modules, wherein the power modules are connected in a preset connection manner.

[0131] Fig. 9 An example of a physical structure diagram of a controller is shown below: Fig. 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 may call the logic instructions in the memory 930 to execute the channel matching method of the charging system, the method comprising: determining at least two target matching paths based on the preset connection mode of each of the power modules; and controlling the power modules on each of the target matching paths to synchronously perform channel matching.

[0132] In addition, the logic instructions in the above-mentioned memory 930 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program code.

[0133] On the basis of the above embodiments, on the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to execute the channel matching method of the charging system provided by the above methods, the method comprising: determining at least two target matching paths based on a preset connection method of each of the power modules; and controlling the power modules on each of the target matching paths to synchronously perform channel matching.

[0134] Based on the above embodiments, the present invention further provides a charging system, comprising a charging device as described in the above embodiments and at least two charging terminals, wherein 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.

[0135] The charging device is used to determine at least two target matching paths based on the preset connection mode of each power module, and control each power module to start up with a set voltage in sequence according to each target matching path; the charging terminal is used to determine the output sampling voltage corresponding to 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 the power module for 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 (such as a charging gun) or directly connected to a load (such as 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 the embodiment of this specification, which will not be repeated here.

[0138] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0139] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment 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, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A channel matching method for a charging system, characterized in that: The charging system includes at least two power modules, and the power modules are connected in a preset connection mode; the method includes: Determining at least two target matching paths based on a preset connection mode of each of the power modules; The power modules on each of the target matching paths are controlled to synchronously perform channel matching.

2. The channel matching method of the charging system according to claim 1, characterized in that: The target matching paths are complementary to each other, so that any one of the power modules is located on at least one of the target matching paths.

3. The channel matching method of the charging system according to claim 1, characterized in that: The charging system further comprises at least two charging interfaces, each of which is directly connected to a corresponding designated power module; The starting point of at least part of the target matching path is a power module directly connected to the charging interface.

4. The channel matching method of the charging system according to claim 3, characterized in that: 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.

5. The channel matching method of the charging system according to claim 3, characterized in that: The charging system further includes at least one sampling point, each of which is respectively arranged at a location far away from a power module directly connected to each of the charging interfaces, and a starting point of at least part of the target matching paths is a power module directly connected to the sampling point.

6. The channel matching method of the charging system according to claim 1, characterized in that: The 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, the power modules on the target matching path are controlled in sequence to perform channel matching until any power module in the target matching path fails in channel matching or all power modules on the target matching path succeed in channel matching.

7. The channel matching method of the charging system according to claim 1, characterized in that: The 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, 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 been matched to the current power module is terminated.

8. The channel matching method of the charging system according to claim 1, characterized in that: The controlling the power modules of each target matching path 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 the remaining target matching paths containing the power module to perform cross-validation on the power module; If the channel matching result of the power module is a matching failure in each cross-validation channel matching process, the power module is determined to be a faulty module.

9. The channel matching method of the charging system according to claim 1, characterized in that: The method further comprises: Determining at least two preset matching paths based on the preset connection mode of each of the power modules; Determining a current state of each of the power modules; For any power module, if the current state of the power module is unmatched or not cross-validated, the power module is determined as a target power module; wherein the power module that is not cross-validated is a power module that has a unique corresponding target matching path and a channel matching result of a matching failure; Each of the preset matching paths is traversed, and the target power module on the available preset matching path is controlled to perform channel matching until the preset condition is reached and the matching process is terminated; wherein, if the current status of all power modules located before the target power module in the preset matching path is a successful match and / or an offline status, it is determined that the preset matching path is available, and the preset condition includes that all the power modules have undergone channel matching and / or cross-validation and / or traversed all the preset matching paths.

10. The channel matching method of the charging system according to claim 5, characterized in that: The channel matching process includes: Controlling the power module to start up at a set voltage, and determining an output sampling voltage of the power module; A channel matching result of the power module is determined based on the set voltage and the output sampling voltage of the power module.

11. A charging device, comprising a controller and at least two power modules, wherein the power modules are connected in a preset connection mode; The controller includes a memory and a processor, and the memory stores a computer program, characterized in that: When the processor executes the computer program, the channel matching method of the charging system according to any one of claims 1 to 10 is implemented.

12. A charging system, characterized in that: The charging device comprises the charging device as claimed in claim 11 and at least two charging terminals, wherein the power modules in the charging device are connected according to a preset connection mode, and each of the charging terminals 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 mode of each power module, and control each power module to start up at a set voltage in sequence according to each target matching path; The charging terminal is used to determine the output sampling voltage corresponding to 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 sampled voltage of the power module.

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