A super-charging pile plug-and-charge control method and a super-charging pile

Abstract

The application discloses a super-charging pile plug-and-charge control method and a super-charging pile, and the super-charging pile plug-and-charge control method comprises the following steps: after the super-charging pile and a vehicle to be charged establish communication, the insulation voltage of the vehicle to be charged is acquired; it is judged whether the insulation voltage is matched with the PFC bus voltage of the super-charging pile; when the judgment result is yes, the output charging voltage of the super-charging pile is adjusted, so that the output charging voltage of the super-charging pile is matched with the insulation voltage; the charging time sequence is started; wherein the insulation voltage is the maximum working voltage of the battery of the vehicle to be charged. Compared with the prior art, the application can complete all the preliminary work of the super-charging pile by using the time from the gun being pulled out to the gun being inserted, the communication is established instantly when the gun is inserted, the insulation voltage is obtained by reading the BMS data, and the time from the gun being inserted to the charging power being established is greatly reduced.

Description

Technical Field

[0001] This invention relates to new energy vehicles, and in particular to a control method for plug-and-charge supercharging stations and the supercharging station itself. Background Technology

[0002] With the rapid development of new energy vehicles, fast energy replenishment has become the most important issue for consumers when purchasing a car. In order to cater to the customer experience and solve the pain point of excessive charging time for end customers, OEMs are pushing to shorten the charging time to 15-20 minutes to achieve the same refueling experience as gasoline vehicles. Therefore, high-voltage platform technology and the supporting supercharging piles are currently one of the most promising solutions.

[0003] The power module of a charging pile is an indispensable core component of a DC charging pile. It is used to complete the AC / DC conversion of electrical energy and provide output power for the DC charging pile. With the continuous growth of electric vehicles and DC charging piles, the demand for output charging voltage is also constantly changing. Currently, the output charging voltage of various DC-charging electric vehicles is between DC 200 and 1000V. In order to achieve efficient and fast charging, the power module of the DC charging pile must be able to respond quickly throughout the charging process, realizing the concept of plug-and-charge. Similar to the closing of the fuel nozzle when refueling, the fast charging gun of the charging station also needs to be able to charge immediately upon plugging in, demonstrating the advantage of rapid charging.

[0004] Currently, the time for domestically calibrated DC fast charging piles to establish the voltage and current from plugging in the charging gun to the required current is about 30 seconds, which wastes a lot of time. Summary of the Invention

[0005] In response to the problem that existing charging piles waste a lot of time from plugging in the charging gun to actual charging, this invention proposes a control method for plug-and-charge supercharging piles and a supercharging pile itself.

[0006] The technical solution of this invention is to propose a control method for plug-and-charge supercharging piles, comprising:

[0007] After establishing communication between the supercharging pile and the vehicle to be charged, the insulation voltage of the vehicle to be charged is obtained;

[0008] Determine whether the insulation voltage matches the PFC bus voltage of the supercharging pile;

[0009] When the determination is yes, adjust the output charging voltage of the supercharging pile to match the insulation voltage;

[0010] Start the charging sequence;

[0011] The insulation voltage is the maximum operating voltage of the battery of the vehicle to be charged.

[0012] Furthermore, before the supercharging pile establishes communication with the vehicle to be charged, the control method further includes:

[0013] The system detects whether there is a vehicle waiting to be charged at the charging space of the supercharging pile, and performs an identification and authentication process for the vehicle when the vehicle waiting to be charged is detected.

[0014] After completing the identification and authentication process, the PFC module in the supercharging pile is activated to output the PFC bus voltage.

[0015] Furthermore, before the supercharging pile establishes communication with the vehicle to be charged, the control method further includes:

[0016] The system detects whether there is a vehicle waiting to be charged at the charging space of the supercharging pile, and performs an identification and authentication process for the vehicle when the vehicle waiting to be charged is detected.

[0017] After completing the identification and authentication process, the startup procedure of the PFC module in the supercharging pile is skipped, and the PFC bus voltage is output by the AC / DC module in the supercharging pile through the three-phase uncontrolled rectifier circuit.

[0018] Furthermore, both the insulation voltage and the PFC bus voltage of the supercharging pile can operate in a first preset range higher than the first preset value and a second preset range lower than the second preset value.

[0019] The step of determining whether the insulation voltage matches the PFC bus voltage of the supercharging pile includes:

[0020] When the insulation voltage is in a first preset range, determine whether the PFC bus voltage of the supercharging pile is in the first preset range; and / or when the insulation voltage is in a second preset range, determine whether the PFC bus voltage of the supercharging pile is in the second preset range.

[0021] When the determination is yes, the insulation voltage matches the PFC bus voltage of the supercharging pile;

[0022] Wherein, the first preset value is greater than the second preset value.

[0023] Furthermore, when it is determined that the insulation voltage and the PFC bus voltage of the supercharging pile match, after adjusting the output charging voltage of the supercharging pile to match the insulation voltage, the control method further includes:

[0024] The AC / DC module in the supercharging pile is controlled by a control device to issue the required voltage and current.

[0025] The AC / DC module in the supercharging pile is then started with the required voltage and current.

[0026] Wherein, the required voltage and the insulation voltage are both within the first preset range or the second preset range, and the required current is the current of the AC / DC module in the supercharging pile under the required voltage.

[0027] Furthermore, when it is determined that the insulation voltage and the PFC bus voltage of the supercharging pile are mismatched, after adjusting the output charging voltage of the supercharging pile to match the insulation voltage, the control method further includes:

[0028] Restart the AC / DC module in the supercharging pile and perform high-low voltage switching on the AC / DC module in the supercharging pile;

[0029] After the high-low voltage switching is completed, the AC / DC module in the supercharging pile is controlled by the control device to issue the required voltage and current.

[0030] The AC / DC module in the supercharging pile is then started with the required voltage and the required current.

[0031] Furthermore, the output charging voltage of the supercharging pile can operate in a first preset range higher than a first preset value and a second preset range lower than a second preset value;

[0032] Determine whether the insulation voltage matches the output charging voltage of the supercharging pile. If the determination is yes, the control method further includes:

[0033] Skip the step of adjusting the output charging voltage of the charging pile and directly start the charging sequence;

[0034] Wherein, the first preset value is greater than the second preset value.

[0035] Further, determining whether the insulation voltage matches the output charging voltage of the supercharging pile includes:

[0036] When the insulation voltage is within a first preset range, determine whether the output charging voltage of the supercharging pile is within the first preset range; and / or when the insulation voltage is within a second preset range, determine whether the output charging voltage of the supercharging pile is within the second preset range.

[0037] When the determination is yes, the insulation voltage matches the output charging voltage of the supercharging pile.

[0038] Further, adjusting the output charging voltage of the supercharging pile to match the insulation voltage includes:

[0039] Restart the DC / DC module in the supercharging pile and perform high-low voltage switching on the DC / DC module in the supercharging pile;

[0040] After the high-low voltage switching is completed, the DC / DC module in the supercharging pile is started with the set voltage;

[0041] The set voltage and the insulation voltage are both within a first preset range or a second preset range.

[0042] This invention also proposes a supercharging pile using the above-mentioned plug-and-charge control method, comprising: a DC / DC module connected between the supercharging pile body and the bus capacitor, and an AC / DC module connected between the bus capacitor and the mains power. The supercharging pile further includes:

[0043] A detection device for detecting the insulation voltage of the vehicle to be charged;

[0044] A control device is connected to both the DC / DC module and the AC / DC module, and is used to adjust the operating status of the DC / DC module and the AC / DC module.

[0045] Compared with the prior art, the present invention has at least the following beneficial effects:

[0046] This invention can complete all the preliminary work of the supercharging station by utilizing the time from the customer unplugging the charging gun to plugging it in. Communication is established instantly upon plugging in the charging gun, the insulation voltage is obtained by reading the BMS data, and in voltage segments where high and low voltage switching is not required, the required voltage and current are directly sent to the control device of the AC / DC module after the insulation voltage is detected. This optimizes the restart time and significantly reduces the time from plugging in the charging gun to establishing charging power. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the supercharging pile structure proposed in this invention;

[0049] Figure 2 This is a flowchart illustrating the communication process between the vehicle to be charged and the supercharging station before charging, as described in this invention.

[0050] Figure 3 This is a charging flowchart of the vehicle to be charged in the first embodiment of the present invention;

[0051] Figure 4 This is a flowchart illustrating the matching of insulation voltage and supercharging pile charging capacity in this invention.

[0052] Figure 5 This is a flowchart illustrating the charging process of the vehicle to be charged in the second embodiment of the present invention. Detailed Implementation

[0053] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0054] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the invention, and does not imply that every embodiment of the invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0055] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0056] Currently, the time from plugging in the charging gun to establishing the voltage and current for actual charging, and then to the required current, for domestically calibrated DC fast charging piles is approximately 30 seconds, which is a significant waste of time. The idea behind this invention is to utilize the time from when the customer plugs in the charging gun to complete all the preliminary work of the supercharging pile (supercharging station). Communication is established the instant the charging gun is plugged in, the insulation voltage is obtained from the BMS data, and the AC / DC module and DC / DC module are controlled to restart based on different insulation voltages, optimizing the restart time to significantly reduce the time from plugging in the charging gun to establishing charging power.

[0057] Specifically, the plug-and-charge control method for supercharging piles proposed in this invention includes:

[0058] After establishing communication between the supercharging station and the vehicle to be charged, the insulation voltage of the vehicle to be charged is obtained.

[0059] Determine whether the insulation voltage matches the PFC bus voltage of the overcharge pile;

[0060] If the determination is yes, adjust the output charging voltage of the supercharging pile to match the insulation voltage;

[0061] Start the charging sequence.

[0062] Please see Figure 1This is a schematic diagram of the connection of the supercharging pile proposed in this invention, which includes connections to the supercharging pile body ( Figure 1 The charging pile body and bus capacitor (in the middle) Figure 1 The system consists of a DC / DC module (with the bus capacitor side as input and the supercharger pile side as output) located between the DC / DC and AC / DC capacitors, and an AC / DC module (with the mains power as input and the bus capacitor side as output) connected between the bus capacitor and the mains power. The PFC bus voltage refers to the voltage provided by the AC / DC module to the bus capacitor, and the output charging voltage is the voltage provided by the supercharger pile to the charging gun (i.e., the voltage provided by the DC / DC module to the supercharger pile). During the charging process, it is necessary to ensure that the output charging voltage and the PFC bus voltage are matched with the insulation voltage. That is, when the insulation voltage is in the high voltage range, both the output charging voltage and the PFC bus voltage need to be in the high voltage range. Similarly, when the insulation voltage is in the low voltage range, both the output charging voltage and the PFC bus voltage need to be in the low voltage range. In the traditional control method, when performing voltage matching, it is necessary to perform a restart operation on the DC / DC module and the AC / DC module, which wastes a lot of time.

[0063] Based on the above steps, the control logic of the present invention is as follows: after the supercharging pile establishes communication with the vehicle to be charged, the insulation voltage of the vehicle to be charged is first obtained, and then it is determined whether the insulation voltage matches the PFC bus voltage of the supercharging pile, thereby determining whether a restart action needs to be performed on the AC / DC module. If the determination is yes, a restart action can be saved, and the adjustment process of matching the output charging voltage of the supercharging pile with the insulation voltage can be directly entered, so as to optimize the restart time.

[0064] The insulation voltage mentioned above is the maximum operating voltage of the vehicle to be charged. The insulation voltage is obtained through the BMS (Battery Management System) in the vehicle to be charged. Through the above control logic, the present invention can save at least one AC / DC restart time and optimize the power consumption time of the vehicle to be charged.

[0065] Furthermore, before establishing communication between the supercharging station and the vehicle to be charged, the control method proposed in this invention also includes:

[0066] The system detects whether there are vehicles waiting to be charged at the charging spaces of the supercharging piles, and performs an identification and authentication process for the vehicles waiting to be charged when a vehicle is detected.

[0067] After completing the identification and authentication process, the PFC module (Power Factor Correction Module) in the supercharging pile is activated to output the PFC bus voltage.

[0068] This step addresses the issue of excessively long communication establishment time between the supercharging station and the vehicle in the initial stages. In traditional solutions, the supercharging station needs to initiate communication with the vehicle only after completing the charging gun insertion / removal action and receiving the insertion command. (See [link to previous section]). Figure 2 The present invention addresses this issue by enabling the supercharging pile's front-facing camera to recognize the license plate and complete the card-swiping authentication process when a vehicle enters the charging space. Upon receiving the charging gun insertion / removal command, the insulation voltage can be directly obtained for subsequent matching between the insulation voltage and the supercharging pile's PFC bus voltage and output charging voltage. Compared to traditional solutions, this approach completes all preparatory work as soon as the vehicle enters the charging space, saving the time required for communication establishment from charging gun insertion / removal in traditional solutions and improving the user experience.

[0069] Furthermore, in other embodiments of the present invention, before the supercharging pile establishes communication with the vehicle to be charged, the control method further includes:

[0070] The system detects whether there are vehicles waiting to be charged at the charging spaces of the supercharging piles, and performs an identification and authentication process for the vehicles waiting to be charged when a vehicle is detected.

[0071] After completing the identification and authentication process, the startup procedure of the PFC module in the supercharging pile is skipped, and the PFC bus voltage is output by the AC / DC module in the supercharging pile through the three-phase uncontrolled rectifier circuit.

[0072] In this scheme, the process of matching the subsequent insulation voltage with the PFC bus voltage and output charging voltage of the supercharging pile is the same as in the previous embodiment. When a high-low voltage switch is required, the DC / DC module or AC / DC module is restarted; otherwise, the AC / DC module is started directly, and charging begins. In this scheme, since the front-end PFC bus voltage is established through the AC / DC three-phase uncontrolled rectifier circuit, it can save at least one PFC module self-test startup time regardless of whether a high-low voltage switch is required, thus optimizing the charging speed of the entire vehicle.

[0073] Please see Figure 3 and Figure 5 In the first embodiment of the present invention, after the host computer sends the power-on command, the PFC module needs to respond to the power-on command and perform corresponding actions. However, in the second embodiment of the present invention, after the host computer sends the power-on command, the DC module (including the AC / DC module and the DC / DC module) responds directly, skipping the startup procedure of the PFC module. That is, regardless of whether high-low voltage switching is required, at least one PFC module self-test startup time can be saved.

[0074] Furthermore, the insulation voltage and the PFC bus voltage of the supercharging pile proposed in this invention can both operate in a first preset range (i.e., high voltage section) higher than the first preset value and a second preset range (i.e., low voltage section) lower than the second preset value.

[0075] To address this, the steps outlined above for determining whether the insulation voltage matches the PFC bus voltage of the supercharging pile include the following:

[0076] When the insulation voltage is in the first preset range, determine whether the PFC bus voltage of the supercharging pile is in the first preset range; and / or when the insulation voltage is in the second preset range, determine whether the PFC bus voltage of the supercharging pile is in the second preset range.

[0077] When the determination is yes, the insulation voltage matches the PFC bus voltage of the supercharging pile;

[0078] The first preset value is greater than the second preset value.

[0079] Here, there are four possible distribution scenarios for the insulation voltage and the PFC bus voltage: the insulation voltage is in the high-voltage segment but the PFC bus voltage of the supercharger is in the low-voltage segment; both the insulation voltage and the PFC bus voltage of the supercharger are in the high-voltage segment; the insulation voltage is in the low-voltage segment but the PFC bus voltage of the supercharger is in the high-voltage segment; and both the insulation voltage and the PFC bus voltage of the supercharger are in the low-voltage segment. Only the second and fourth scenarios meet the above-mentioned judgment logic, meaning the insulation voltage matches the PFC bus voltage of the supercharger.

[0080] For the second and fourth scenarios mentioned above, since the insulation voltage matches the PFC bus voltage of the supercharger, there is no need to perform a restart operation on the AC / DC module, saving preparation time before charging. Specifically, when determining whether the insulation voltage matches the PFC bus voltage of the supercharger, after adjusting the output charging voltage of the supercharger to match the insulation voltage, the above control method further includes:

[0081] The control device controls the AC / DC module of the supercharging pile to send the required voltage and current.

[0082] The AC / DC module in the supercharging station is started with the required voltage and current.

[0083] Here, this part of the process is the charging initiation procedure. Since the output charging voltage of the supercharger and the PFC bus voltage need to match the insulation voltage before formal charging, the above steps need to be set after adjusting the output charging voltage of the supercharger to match the insulation voltage. As can be seen from the above steps, in this case, the invention skips the AC / DC module restart operation, thus saving the AC / DC module restart time and further reducing the preparation time before charging.

[0084] In this process, the required voltage mentioned above matches the insulation voltage (i.e., the required voltage and the insulation voltage are both within the first preset range or the second preset range), and the required current is the current of the AC / DC module in the supercharging pile at the required voltage. It should be noted that the matching mentioned in this invention does not mean that the required voltage and the insulation voltage are equal, but rather that the required voltage can be used to match the insulation voltage. Generally, the required voltage will be slightly less than the insulation voltage.

[0085] Furthermore, since there are four possible scenarios regarding the insulation voltage and the PFC bus voltage of the supercharger, two scenarios exist: one where the insulation voltage is in the high-voltage range but the PFC bus voltage of the supercharger is in the low-voltage range, and the other where the insulation voltage is in the low-voltage range but the PFC bus voltage of the supercharger is in the high-voltage range. In these two scenarios, it is necessary to adjust the PFC bus voltage of the supercharger. Specifically, the control logic in this scenario is as follows:

[0086] Restart the AC / DC module in the supercharging station and perform high / low voltage switching on the AC / DC module in the supercharging station;

[0087] After the high-low voltage switching is completed, the AC / DC module in the supercharging pile is controlled by the control device to send the required voltage and current.

[0088] The AC / DC module in the supercharging station is started with the required voltage and current.

[0089] In this situation, because the PFC bus voltage of the supercharging pile does not match the insulation voltage, it is necessary to perform high-low voltage switching on the AC / DC module. This is achieved through the control device within the supercharging pile. Here, the AC / DC module is used to convert mains power (alternating current) into direct current and supply it to the bus capacitor. High-low voltage switching means that, without switching, the AC / DC module can convert mains power to low-voltage DC power, and after high-low voltage switching, the AC / DC module can convert mains power to high-voltage DC power (or, without switching, the AC / DC module can convert mains power to high-voltage DC power, and after high-low voltage switching, the AC / DC module can convert mains power to low-voltage DC power). Through the above operations, this invention enables the PFC bus voltage of the supercharging pile to meet the insulation voltage requirements.

[0090] Furthermore, the output charging voltage of the supercharging pile is consistent with the PFC bus voltage of the supercharging pile, and both can operate in the first preset range (i.e., high voltage section) which is higher than the first preset value, and the second preset range (i.e., low voltage section) which is lower than the second preset value.

[0091] In this case, the control method further includes determining whether the insulation voltage matches the output charging voltage of the supercharging pile. If the determination is yes, the control method also includes:

[0092] Skip the step of adjusting the output charging voltage of the charging station and start the charging sequence directly;

[0093] The first preset value is greater than the second preset value.

[0094] This step further reduces pre-charging preparation time. If the insulation voltage matches the output charging voltage of the supercharging station, there's no need to restart the DC / DC module; power can be supplied directly to the vehicle being charged. Therefore, in the above process, when it's determined that the insulation voltage matches the supercharging station's output charging voltage, the step of adjusting the supercharging station's output charging voltage to match the insulation voltage is skipped. This solution saves one DC / DC module restart time, further reducing pre-charging preparation time.

[0095] Since the output charging voltage of the supercharger is the same as the PFC bus voltage of the supercharger, and both can operate in the high-voltage and low-voltage sections, the above-mentioned step of determining whether the insulation voltage matches the output charging voltage of the supercharger includes:

[0096] When the insulation voltage is within a first preset range, determine whether the output charging voltage of the supercharging pile is within the first preset range; and / or when the insulation voltage is within a second preset range, determine whether the output charging voltage of the supercharging pile is within the second preset range.

[0097] When the determination is yes, the insulation voltage matches the output charging voltage of the supercharging pile.

[0098] Specifically, there are three cases regarding the insulation voltage and the output charging voltage of the supercharger: both the insulation voltage and the output charging voltage of the supercharger are in the high-voltage range; both the insulation voltage and the output charging voltage of the supercharger are in the low-voltage range; and the insulation voltage is in the high-voltage range but the output charging voltage is in the low-voltage range. The above determination that the insulation voltage matches the output charging voltage of the supercharger falls under the first and second cases. In these two cases, at least one DC / DC restart time can be saved.

[0099] Furthermore, for the third scenario mentioned above, namely the mismatch between the insulation voltage and the output charging voltage of the supercharger, it is necessary to perform the step described above, "adjusting the output charging voltage of the supercharger to match the insulation voltage." Specifically, this step includes the following:

[0100] Restart the DC / DC module in the supercharging station and perform high-low voltage switching on the DC / DC module in the supercharging station;

[0101] After the high-low voltage switching is completed, the DC / DC module in the supercharging station is started with the set voltage.

[0102] In this situation, because the output charging voltage of the supercharging pile does not match the insulation voltage, it is necessary to perform high-low voltage switching on the DC / DC module. This is achieved through the control device within the supercharging pile. Here, the DC / DC module is used to adjust the voltage output by the bus capacitor and provide it to the vehicle being charged. High-low voltage switching means that when no switching is performed, the DC / DC module can convert the voltage output by the bus capacitor to low-voltage DC. After performing high-low voltage switching, the DC / DC module can convert the voltage output by the bus capacitor to high-voltage DC (or, when no switching is performed, the DC / DC module can convert the voltage output by the bus capacitor to high-voltage DC, and after performing high-low voltage switching, the DC / DC module can convert the voltage output by the bus capacitor to low-voltage DC). Through the above operations, this invention enables the output charging voltage of the supercharging pile to meet the insulation voltage requirements.

[0103] Please see Figure 4 This is a schematic diagram illustrating the matching of insulation voltage and charging capacity of the supercharging pile in this invention. After the charging battery is connected, the DC / DC module will only be activated when the charging capacity of the supercharging pile (i.e., the output charging voltage) meets the insulation voltage.

[0104] Furthermore, the present invention also proposes a supercharging pile using the above-mentioned plug-and-charge control method, which includes: a DC / DC module connected between the supercharging pile body and the bus capacitor, and an AC / DC module connected between the bus capacitor and the mains power.

[0105] It also includes: a detection device used to detect the insulation voltage of the vehicle to be charged;

[0106] The control device is connected to the DC / DC module and the AC / DC module respectively, and is used to adjust the operating status of the DC / DC module and the AC / DC module.

[0107] It should be noted that the aforementioned supercharging pile includes, in addition to the DC / DC module connected between the supercharging pile body and the bus capacitor, and the AC / DC module connected between the bus capacitor and the mains power, the supercharging pile body and the charging gun connected to the supercharging pile body.

[0108] The above control method can perform the switching action through the detection device and the control device to meet actual usage requirements.

[0109] Compared with existing technologies, this invention can complete all the preliminary work of the supercharging station by utilizing the time from the customer unplugging the charging gun to plugging it in. Communication is established instantly upon plugging in the charging gun, the insulation voltage is obtained by reading the BMS data, and in voltage segments where high and low voltage switching is not required, the required voltage and current are directly sent to the control device of the AC / DC module after the insulation voltage is detected. This optimizes the restart time and significantly reduces the time from plugging in the charging gun to establishing charging power.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control method for plug-and-charge supercharging piles, characterized in that, include: After establishing communication between the supercharging pile and the vehicle to be charged, the insulation voltage of the vehicle to be charged is obtained; Determine whether the insulation voltage matches the PFC bus voltage of the supercharging pile; When the determination is yes, adjust the output charging voltage of the supercharging pile to match the insulation voltage; Start the charging sequence; The insulation voltage is the maximum operating voltage of the battery of the vehicle to be charged.

2. The control method according to claim 1, characterized in that, Before the supercharging pile establishes communication with the vehicle to be charged, the control method further includes: The system detects whether there is a vehicle waiting to be charged at the charging space of the supercharging pile, and performs an identification and authentication process for the vehicle when the vehicle waiting to be charged is detected. After completing the identification and authentication process, the PFC module in the supercharging pile is activated to output the PFC bus voltage.

3. The control method according to claim 1, characterized in that, Before the supercharging pile establishes communication with the vehicle to be charged, the control method further includes: The system detects whether there is a vehicle waiting to be charged at the charging space of the supercharging pile, and performs an identification and authentication process for the vehicle when the vehicle waiting to be charged is detected. After completing the identification and authentication process, the startup procedure of the PFC module in the supercharging pile is skipped, and the PFC bus voltage is output by the AC / DC module in the supercharging pile through the three-phase uncontrolled rectifier circuit.

4. The control method according to claim 1, characterized in that, Both the insulation voltage and the PFC bus voltage of the supercharging pile can operate in a first preset range higher than the first preset value and a second preset range lower than the second preset value. The step of determining whether the insulation voltage matches the PFC bus voltage of the supercharging pile includes: When the insulation voltage is in a first preset range, determine whether the PFC bus voltage of the supercharging pile is in the first preset range; and / or when the insulation voltage is in a second preset range, determine whether the PFC bus voltage of the supercharging pile is in the second preset range. When the determination is yes, the insulation voltage matches the PFC bus voltage of the supercharging pile; Wherein, the first preset value is greater than the second preset value.

5. The control method according to claim 4, characterized in that, When it is determined that the insulation voltage and the PFC bus voltage of the supercharger are matched, after adjusting the output charging voltage of the supercharger to match the insulation voltage, the control method further includes: The AC / DC module in the supercharging pile is controlled by a control device to issue the required voltage and current. The AC / DC module in the supercharging pile is then started with the required voltage and current. Wherein, the required voltage and the insulation voltage are both within the first preset range or the second preset range, and the required current is the current of the AC / DC module in the supercharging pile under the required voltage.

6. The control method according to claim 4, characterized in that, When it is determined that the insulation voltage and the PFC bus voltage of the supercharger are mismatched, after adjusting the output charging voltage of the supercharger to match the insulation voltage, the control method further includes: Restart the AC / DC module in the supercharging pile and perform high-low voltage switching on the AC / DC module in the supercharging pile; After the high-low voltage switching is completed, the AC / DC module in the supercharging pile is controlled by the control device to issue the required voltage and current. The AC / DC module in the supercharging pile is then started with the required voltage and the required current.

7. The control method according to claim 1, characterized in that, The output charging voltage of the supercharging pile can operate in a first preset range higher than a first preset value and a second preset range lower than a second preset value; Determine whether the insulation voltage matches the output charging voltage of the supercharging pile. If the determination is yes, the control method further includes: Skip the step of adjusting the output charging voltage of the supercharging pile and directly start the charging sequence; Wherein, the first preset value is greater than the second preset value.

8. The control method according to claim 7, characterized in that, Determining whether the insulation voltage matches the output charging voltage of the supercharging pile includes: When the insulation voltage is within a first preset range, determine whether the output charging voltage of the supercharging pile is within the first preset range; and / or when the insulation voltage is within a second preset range, determine whether the output charging voltage of the supercharging pile is within the second preset range. When the determination is yes, the insulation voltage matches the output charging voltage of the supercharging pile.

9. The control method according to claim 8, characterized in that, Adjusting the output charging voltage of the supercharging pile to match the insulation voltage includes: Restart the DC / DC module in the supercharging pile and perform high-low voltage switching on the DC / DC module in the supercharging pile; After the high-low voltage switching is completed, the DC / DC module in the supercharging pile is started with the set voltage; The set voltage and the insulation voltage are both within a first preset range or a second preset range.

10. A supercharging pile employing the plug-and-charge control method for supercharging piles as described in any one of claims 1 to 9, comprising: The DC / DC module connected between the supercharging pile body and the bus capacitor, and the AC / DC module connected between the bus capacitor and the mains power, are characterized in that they further include: A detection device for detecting the insulation voltage of the vehicle to be charged; A control device is connected to both the DC / DC module and the AC / DC module, and is used to adjust the operating status of the DC / DC module and the AC / DC module.

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