Charging pile parallel charging data processing method, charging pile charging system and electronic equipment

Abstract

The present application discloses a data processing method for charging piles and charging in parallel, a charging pile charging system and an electronic device. A resistor switching unit is provided in each charging gun communication interface of the charging pile. The method comprises: receiving charging gun charging data sent by the charging pile, obtaining the loop current of the charging gun according to the charging gun charging data, and if the difference between the loop current and the preset standard current is greater than the preset threshold, sending a switch disconnection indication message to the charging pile so that the charging pile disconnects the resistor switching switches corresponding to all the charging guns in parallel, selecting a charging gun from the charging guns as the target charging gun, and sending a switch closing indication message to the charging pile corresponding to the target charging gun so that the charging pile corresponding to the target charging gun closes the resistor switching switch corresponding to the target charging gun and starts the charging pile and charging process. The technical solution provided by the present application ensures the stable transmission of the charging communication signal and the stability of multi-gun parallel charging.

Description

Technical Field

[0001] The present application relates to the technical field of charging piles, and in particular to a data processing method for charging piles, charging piles and electronic equipment. Background Art

[0002] With the rapid development of the new energy vehicle industry, the number of new energy vehicles is increasing, and the application scenarios of new energy vehicles are becoming more and more extensive. In addition to the increasing demand for charging for daily household passenger cars, large trucks such as mud trucks and commercial heavy trucks are also gradually electrifying, and there are more and more application scenarios for pure electric large trucks. The electrification of heavy trucks must first ensure that the load capacity of the truck remains unchanged, and the battery life also needs to be guaranteed to a certain extent. In this way, the battery capacity of electric heavy trucks is destined to be large. With the increase in battery capacity, the charging and discharging power of the battery will usually increase accordingly to maintain the normal operation of electric heavy trucks and meet the daily transportation needs of electric heavy trucks. However, the maximum current that our common charging guns can run is very limited, generally 250A. For electric heavy trucks, the output power of a single gun is often far from the maximum power allowed by the battery. Therefore, the OEM manufacturer will equip the electric heavy truck with two or even four charging ports for multi-gun simultaneous charging, also known as multi-gun parallel charging. Although general OEMs will be equipped with multiple charging ports, they adopt a BMS (Battery Management System) solution. In this solution, the communication terminals (S+ / S-) inside the multiple charging ports are interoperable. Figure 1 It is a schematic diagram of a charging socket for charging piles and charging, such as Figure 1 As shown, charger manufacturers can use multiple chargers for parallel charging, which mainly involves inserting multiple charging guns at the same time and using multiple charging guns to charge the battery at the same time to improve charging efficiency.

[0003] However, in order to allow a single gun to charge normally, the charger manufacturer will incorporate a terminal resistor between the S+ / S- of each charging gun to stabilize the communication loop before leaving the factory. Similarly, the OEM will also set a terminal resistor at the vehicle-side charging port. When a single gun is connected to the vehicle-side charging port, the matching resistance of the charging circuit is the optimal impedance of the CAN communication circuit. When multiple guns are charged in parallel, each charging gun will be incorporated with a terminal resistor, making the matching impedance of the circuit too small. When the impedance in the circuit is suitable for signal transmission, signal reflection occurs. When the impedance is too small, the signal reflection decreases, which causes the charging pile to be unable to communicate normally with the vehicle-side BMS, making it impossible to charge normally. Summary of the invention

[0004] The present application provides a data processing method for charging pile parallel charging, a charging pile charging system, a device, a storage medium, and a computer program product, which can adjust the impedance in the charging circuit when multiple guns are charged in parallel to ensure the stability of the multi-gun parallel charging communication, thereby ensuring that the multi-gun parallel charging can proceed normally.

[0005] On the one hand, an embodiment of the present specification provides a data processing method for charging a charging pile and charging simultaneously. A resistor switching unit is provided in each charging gun communication interface of the charging pile, and the resistor switching unit includes a milliohm resistor, a charging gun terminal resistor and a normally closed resistor switching switch. The charging gun terminal resistor is connected in series with the resistor switching switch and then connected in parallel between the positive and negative electrodes of the charging gun communication interface. The milliohm resistor is connected in series on the main circuit of the charging gun charging circuit. The method includes:

[0006] Receiving charging data of a charging gun sent by a charging pile, wherein the charging data of the charging gun includes: circuit data in a charging circuit of the charging gun and a device identifier of a device to be charged corresponding to the charging gun;

[0007] Obtaining a loop current of a parallel charging gun according to the charging data of the charging gun, wherein the parallel charging gun is a charging gun that charges the same device to be charged;

[0008] Compare the loop current of the parallel charging gun with the preset standard current, and if the difference between the loop current and the preset standard current is greater than a preset threshold, send a switch disconnection instruction message of disconnecting the resistance switching switch to the charging pile, so that the charging pile disconnects the resistance switching switches corresponding to all the parallel charging guns;

[0009] A charging gun is selected from the parallel charging guns as the target charging gun, and a switch closing indication information of closing the resistance switching switch is sent to the charging pile corresponding to the target charging gun, wherein the switch closing indication information includes the serial number of the target charging gun, so that the charging pile corresponding to the target charging gun closes the resistance switching switch corresponding to the target charging gun and starts the parallel charging process of the charging pile.

[0010] Furthermore, when the difference between the loop current and the preset standard current is greater than a preset threshold, the method further includes:

[0011] Obtaining the number of the parallel charging guns, and if the number of the parallel charging guns is greater than 2, sending a switch disconnection indication message of disconnecting the resistor switching switch to the charging pile;

[0012] If the number of the parallel charging guns is equal to 2, one charging gun is directly selected from the parallel charging guns as the switching charging gun, and a switch disconnection instruction information of disconnecting the resistance switching switch is sent to the charging pile corresponding to the switching charging gun, so that the charging pile corresponding to the switching charging gun disconnects the resistance switching switch of the switching charging gun and starts the parallel charging process of the charging pile.

[0013] Further, the circuit data in the charging circuit of the charging gun includes: the voltage across the milliohm resistor corresponding to the charging gun; the circuit current of the charging gun obtained and charged according to the charging data of the charging gun includes:

[0014] Calculate the current passing through the milliohm resistor corresponding to the charging gun according to the voltage across the milliohm resistor corresponding to the charging gun and the resistance value of the milliohm resistor to obtain the impedance current of the charging gun;

[0015] According to the device identifier of the device to be charged corresponding to the charging gun, the impedance current of the charging gun charging the same device to be charged is used as the loop current of the parallel charging gun.

[0016] Furthermore, before receiving the charging gun and charging data sent by the charging pile, the method further includes:

[0017] Receive the single-gun charging voltage across the milliohm resistor corresponding to the charging gun when the charging pile is charging the single gun;

[0018] According to the single-gun charging voltage and the resistance value of the milliohm resistor corresponding to the charging gun during the single-gun charging, the single-gun charging loop current during the single-gun charging is calculated, and the single-gun charging loop current is used as the preset standard current and stored.

[0019] Furthermore, the charging data of the charging gun also includes the serial number of the parallel charging guns, and the step of selecting a charging gun from the parallel charging guns as a target charging gun includes:

[0020] According to the serial numbers of the parallel charging guns, a charging gun with the largest number or the smallest number is selected as the target charging gun.

[0021] On the other hand, an embodiment of the present specification provides a data processing method for parallel charging of a charging pile, wherein a resistor switching unit is provided in each charging gun communication interface of the charging pile, wherein the resistor switching unit comprises a milliohm resistor, a charging gun terminal resistor and a normally closed resistor switching switch, wherein the charging gun terminal resistor is connected in series with the resistor switching switch and then connected in parallel between the positive and negative electrodes of the charging gun communication interface, and the milliohm resistor is connected in series on the main circuit of the charging gun charging circuit, and the method comprises:

[0022] When it is detected that the charging gun is connected to the charging port of the device to be charged, circuit data in the charging circuit of the charging gun is detected;

[0023] The circuit data and the device identification of the device to be charged corresponding to the charging gun are sent to the charging pile management platform as charging gun charging data; so that the charging pile management platform obtains the loop current of the charging gun based on the charging gun charging data, and compares the loop current of the charging gun with a preset standard current, and the charging gun is a charging gun that charges the same device to be charged;

[0024] Receive the switch disconnection indication information sent by the charging pile management platform, and disconnect all the resistance switching switches corresponding to the charging guns according to the switch disconnection indication information; the switch disconnection indication information is sent by the charging pile management platform after determining that the difference between the loop current and the preset standard current is greater than a preset threshold;

[0025] Receiving switch closing indication information for closing the resistance switching switch corresponding to the target charging gun sent by the charging pile management platform, and closing the resistance switching switch corresponding to the target charging gun according to the switch closing indication information; the switch closing indication information includes the serial number of the target charging gun;

[0026] Start the charging station and start the charging process.

[0027] Further, when it is detected that the charging gun is connected to the charging port of the device to be charged, detecting the circuit data in the charging circuit of the charging gun includes:

[0028] When it is detected that the charging gun is connected to the charging port of the device to be charged, the voltage across the charging gun terminal resistor corresponding to the charging gun is detected;

[0029] Calculate the current passing through the charging gun terminal resistor corresponding to the charging gun according to the voltage across the charging gun terminal resistor corresponding to the charging gun to obtain the impedance current of the charging gun;

[0030] The impedance current is used as circuit data of the charging gun.

[0031] Furthermore, the method further comprises:

[0032] When charging a single gun, detect the charging voltage of the single gun across the milliohm resistor corresponding to the charging gun;

[0033] Calculate the single-gun charging circuit current when the single-gun is charging according to the single-gun charging voltage and the resistance value of the milliohm resistor corresponding to the charging gun when the single-gun is charging;

[0034] The single-gun charging loop current is sent to the charging pile management platform, so that the charging pile management platform stores the single-gun charging loop current as the preset standard current.

[0035] On the other hand, an embodiment of the present specification provides a charging pile charging system, the system comprising: a charging pile management platform, at least one charging pile, the charging pile comprising at least one charging gun, each charging gun communication interface being provided with a resistance switching unit, the resistance switching unit comprising a milliohm resistor, a charging gun terminal resistor and a normally closed resistance switching switch, the charging gun terminal resistor being connected in series with the resistance switching switch and then connected in parallel between the positive and negative electrodes of the charging gun communication interface, the milliohm resistor being connected in series with the main circuit of the charging gun charging circuit, and the charging pile being communicatively connected with the charging pile management platform;

[0036] After the charging pile detects that the charging gun is connected to the charging port of the device to be charged, the charging pile detects the circuit data in the charging circuit of the charging gun, and sends the circuit data and the device identification of the device to be charged corresponding to the charging gun as charging data of the charging gun to the charging pile management platform;

[0037] The charging pile management platform obtains the loop current of the parallel charging gun according to the received charging data of the charging gun, and compares the loop current of the parallel charging gun with a preset standard current. If the difference between the loop current and the preset standard current is greater than a preset threshold, a switch disconnection indication information of disconnecting the resistor switching switch is sent to the charging pile; the parallel charging gun is a charging gun that charges the same device to be charged;

[0038] The charging pile disconnects all the resistor switching switches corresponding to the charging guns according to the switch disconnection indication information;

[0039] The charging pile management platform selects a charging gun from the parallel charging guns as a target charging gun, and sends a switch closing indication information of a closing resistor switching switch to the charging pile corresponding to the target charging gun, wherein the switch closing indication information includes the serial number of the target charging gun;

[0040] After receiving the switch closing indication information, the charging pile corresponding to the target charging gun closes the resistance switching switch corresponding to the target charging gun and starts the charging pile parallel charging process.

[0041] On the other hand, an embodiment of this specification provides an electronic device, including: a processor;

[0042] a memory for storing instructions executable by the processor;

[0043] Wherein, the processor is configured to execute the instructions to implement the data processing method for parallel charging of charging piles as described in any of the above items.

[0044] On the other hand, an embodiment of the present specification provides a computer-readable storage medium. When the instructions in the storage medium are executed by a processor of an electronic device, the electronic device can execute any of the above-mentioned data processing methods for charging piles and charging simultaneously.

[0045] On the other hand, the embodiments of this specification provide a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the data processing method for charging piles and charging provided in the above various optional implementations.

[0046] The data processing method for charging piles, charging pile charging system, equipment, storage medium, and computer program product provided by the present application have the following technical effects:

[0047] The data processing method for parallel charging of charging piles provided in the present application sets a resistance switching unit in the communication port of each charging gun, and sets a milliohm resistor, a charging gun terminal resistor, and a normally closed resistance switching switch in the resistance switching unit. When charging, by detecting the loop current in the charging gun, the loop current is compared with the preset standard current to identify whether the impedance in the current charging loop is too small. When the impedance in the charging loop is too small due to the parallel charging of multiple guns, which will cause the communication signal to be unstable, the charging pile management platform sends a switch disconnection indication message to the charging piles of all the parallel charging guns, disconnects the resistance switching switches of all the charging guns, and thus disconnects the charging gun terminal resistors of all the charging guns from the charging loop. Then select a target charging gun, close the resistance switching switch of the target charging gun, so that only the charging gun terminal resistance of the target charging gun is connected to the charging circuit. In this way, in a multi-gun charging scenario, only the charging gun terminal resistance of the target charging gun is connected to the charging circuit, and other charging guns are only connected to the milliohm resistor. Because the resistance value of the milliohm resistor is relatively small, the impact on the impedance can be ignored, thereby ensuring that the resistance value in the charging circuit meets the optimal impedance, ensuring the stable transmission of the charging communication signal, and ensuring the stability of multi-gun parallel charging. In addition, by controlling the resistance switching switch in the resistance switching unit in the charging gun, the size of the impedance matched to the charging circuit can be flexibly adjusted, realizing the flexible adjustment of the charging circuit impedance, and ensuring the stable transmission of the charging communication signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0049] Figure 1 It is a schematic diagram of a charging socket for charging a charging pile and charging;

[0050] Figure 2 It is a flow chart of a data processing method for charging piles and charging in parallel provided in an embodiment of the present application;

[0051] Figure 3 is a schematic diagram of the structure of a resistor switching unit in one embodiment of the present specification;

[0052] Figure 4 It is a schematic diagram of a multi-gun communication topology structure with a resistor switching unit in one embodiment of this specification;

[0053] Figure 5 This is a schematic diagram of the data processing flow of a charging pile when performing multi-gun simultaneous charging in one embodiment of this specification;

[0054] Figure 6 This is a schematic diagram of a scenario in which a vehicle has multiple guns and is charged simultaneously in one embodiment of this specification;

[0055] Figure 7 This is a schematic diagram of data interaction between a charging pile management platform and a charging pile in a charging pile parallel charging scenario in one embodiment of this specification;

[0056] Figure 8 It is a block diagram of another electronic device for data processing of charging piles and charging provided in an embodiment of the present application. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0058] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0059] like Figure 1 As shown, parallel charging of charging piles can be understood as a scenario in which multiple charging guns charge the same battery. The embodiment of this specification provides a data processing method for parallel charging of charging piles, which can automatically match the appropriate resistance for the charging circuit when the charging piles are charged in parallel, so that the charging gun can communicate normally with the BMS, thereby enabling multiple charging guns to charge normally when charged in parallel, thereby ensuring the stability of the parallel charging of the charging piles.

[0060] The following describes a data processing method for charging a charging pile in the present application. Figure 2 It is a flow chart of a data processing method for charging piles and charging provided in an embodiment of the present application. This specification provides method operation steps such as the embodiment or flow chart, but may include more or fewer operation steps based on conventional or non-creative labor. The order of steps listed in the embodiment is only one way of executing the order of many steps and does not represent the only execution order. When the actual system or server product is executed, it can be executed in sequence or in parallel according to the method shown in the embodiment or the accompanying drawings (for example, a parallel processor or a multi-threaded processing environment). The data processing method for charging piles and charging provided in the embodiment of this specification can be applied to a charging pile management platform. The charging pile management platform can be a terminal device capable of data processing such as: a controller, a computer, a smart phone, a tablet computer, a smart wearable device, and a vehicle-mounted device. Of course, it can also be applied to a server, and the embodiment of this specification does not make specific limitations.

[0061] The data processing method for parallel charging of charging piles provided in the embodiments of this specification can be applied to a charging pile charging system, which may include a charging pile management platform and at least one charging pile, each charging pile may include at least one charging gun, and a resistance switching unit (RSU, Resistance Switching Unit) may be provided in each charging gun communication interface, and the resistance switching unit provided in each charging gun communication interface is the same. Figure 3is a schematic diagram of the structure of a resistor switching unit in an embodiment of this specification, such as Figure 3 As shown, the resistor switching unit may include a milliohm resistor R2, a charging gun terminal resistor R1, and a normally closed resistor switching switch K1, wherein the charging gun terminal resistor R1 is connected in series with the resistor switching switch K1 and then connected in parallel between the positive and negative electrodes of the charging gun communication interface, and the milliohm resistor R2 is connected in series to the main circuit of the charging gun charging circuit, and the opening and closing of the resistor switching switch K1 can control whether the charging gun terminal resistor R1 is connected to the charging circuit of the charging gun. Figure 3 As shown, after the charging gun is plugged in, the communication port is connected to the CAN (Controller Area Network) bus, and the resistor switching unit is connected in parallel between the two output terminals CAN_H and CAN_L of the CAN bus. Among them, the milliohm resistor can be understood as a low-resistance resistor with a small resistance, generally less than 1 ohm. In some embodiments of this specification, the resistance of the milliohm resistor R2 in the resistor switching unit can be set to 100 milliohms. Of course, according to actual needs, it can also be set to other resistance values. Under normal circumstances, the smaller the resistance of the milliohm resistor, the better. The resistance value of the charging gun terminal resistor R1 in the resistor switching unit is generally the same as the terminal resistor of the vehicle charging port. Under normal circumstances, the characteristic impedance of the communication cable of the CAN bus is about 120 ohms. The resistance value of the charging gun terminal resistor R1 can also be set to 120 ohms. This can prevent signal reflection and interference, reduce signal distortion and jitter, and ensure the stability of the charging signal.

[0062] like Figure 2 As shown, the data processing method for charging piles and charging simultaneously performed by the charging pile management platform may include:

[0063] S202: Receive charging data of a charging gun sent by a charging pile, where the charging data of the charging gun includes: circuit data in a charging circuit of the charging gun and a device identifier of a device to be charged corresponding to the charging gun.

[0064] In the specific implementation process, after the charging pile detects that a charging gun is inserted into the charging port, it can detect the circuit data of the charging circuit where the charging gun is located, wherein the circuit data may include voltage data, current data, etc. in the charging circuit where the charging pile is located. For example, the charging pile can detect the voltage across the milliohm resistor in the resistor switching unit corresponding to the charging gun inserted into the charging port, and send the voltage as circuit data together with the device identifier of the device to be charged corresponding to the charging gun as charging data of the charging gun to the charging pile management platform. Among them, the device to be charged can be a vehicle or other device that needs to be charged, which is not specifically limited in the embodiments of this specification.

[0065] When the charging gun is detected to be plugged in, the charging pile will detect the circuit data in the loop where the charging gun is located, and based on the message data between the charging gun and the bus, the identification of the device to be charged corresponding to the charging gun can be obtained. When the charging pile sends the charging data of the charging gun to the charging pile management platform, the device identification of the device to be charged corresponding to the charging gun can be sent together. The charging pile management platform can treat the charging guns that charge the same device to be charged as parallel charging guns based on the device identification of the device to be charged, and put the charging data of the parallel charging guns together for easy subsequent processing. Alternatively, if the charging gun can communicate normally and can receive message data, the charging pile can also directly package the circuit data of the charging guns that charge the same device to be charged and the corresponding identification of the device to be charged, and send them to the charging pile management platform as charging data of the charging gun.

[0066] In addition, the number of charging guns may be 2 or more, and the charging guns may belong to the same charging pile or to different charging piles, depending on the actual situation, and the embodiments of this specification do not make specific limitations.

[0067] S204: Obtaining a loop current of a parallel charging gun according to the charging data of the charging gun, where the parallel charging gun is a charging gun that charges the same device to be charged.

[0068] In the specific implementation process, the charging data of the charging gun sent by the charging pile may include the circuit data of the charging gun. If the circuit data includes the current of the charging circuit where the charging gun is located, then the charging pile management platform can directly obtain the current for charging the same device to be charged from the circuit data according to the device identifier of the device to be charged corresponding to the charging gun as the circuit current of the charging gun. If the charging pile uses the voltage across the milliohm resistor in the resistor switching unit corresponding to the charging gun as the circuit data of the charging gun, then the charging pile management platform can calculate the circuit current of the charging circuit where the charging gun is located based on the voltage and the resistance value of the milliohm resistor.

[0069] In some embodiments of this specification, the circuit data in the charging circuit of the charging gun includes: the voltage across the milliohm resistor corresponding to the charging gun, and the circuit current of the charging gun obtained and charged according to the charging data of the charging gun includes:

[0070] Calculate the current passing through the milliohm resistor corresponding to the charging gun according to the voltage across the milliohm resistor corresponding to the charging gun and the resistance value of the milliohm resistor to obtain the impedance current of the charging gun;

[0071] According to the device identifier of the device to be charged corresponding to the charging gun, the impedance current of the charging gun charging the same device to be charged is used as the loop current of the parallel charging gun.

[0072] In the specific implementation process, Figure 3 As shown, when the charging gun is inserted into the charging port, the charging pile can detect the voltage across the milliohm resistor R2 in the resistor switching unit in the communication port of the charging gun, and use the voltage across the milliohm resistor R2 as the circuit data of the charging gun. When the charging pile management platform receives the charging data of the charging gun sent by the charging pile, the voltage across the milliohm resistor corresponding to each charging gun can be obtained from the charging data of the charging gun. Based on the voltage and the resistance value of the milliohm resistor, the current passing through the milliohm resistor in the charging loop where the charging gun is located can be obtained, and the impedance current of the charging gun can be obtained. Then, according to the device identification of the device to be charged corresponding to the charging gun, the impedance current of the charging gun charging the same device to be charged is used as the loop current of the charging gun.

[0073] After multiple charging guns are plugged in, the impedance in the charging circuit may be relatively small, which will cause the charging communication signal to be unstable and unable to communicate normally. As a result, it may be impossible to recognize the identification messages of other charging guns, and it is impossible to confirm whether it is a multi-gun parallel charging scenario, and it is impossible to adjust the impedance in the charging circuit. The milliohm resistor in the resistor switching unit is generally a standard resistor, that is, the resistance value is fixed. The embodiment of this specification detects the voltage across the milliohm resistor in the resistor switching unit, based on Ohm's law, and can accurately and quickly obtain the loop current in the circuit where the charging gun is located, which lays a theoretical foundation for the subsequent judgment of the impedance size in the charging circuit, and then judges whether it belongs to a multi-gun charging scenario, and whether the impedance in the charging circuit meets the requirements, so that the appropriate impedance can be quickly matched for parallel charging to ensure the stability of multi-gun parallel charging.

[0074] S206: Compare the loop current of the parallel charging gun with the preset standard current. If the difference between the loop current and the preset standard current is greater than a preset threshold, send a switch disconnection instruction message to the charging pile to disconnect the resistance switching switch, so that the charging pile disconnects the resistance switching switches corresponding to all the parallel charging guns.

[0075] In the specific implementation process, after the charging pile management platform obtains the loop current in the charging circuit where the charging gun is located, it can compare the loop current of each charging gun with the preset standard current. If the difference between the loop current and the preset standard current is greater than the preset threshold, it can be considered that the current is in a multi-gun parallel charging scenario, and the difference between the impedance in the charging circuit and the optimal impedance is relatively large, which may affect the transmission of the signal and the stability of charging. Among them, the preset standard current can be understood as the current in the charging circuit when the communication circuit has the best impedance when the charging pile is charging. It can generally be the current in the charging circuit where the charging gun is located when a single gun is charging. The value of the preset threshold can be set according to actual needs. It is possible that when the resistance value incorporated in the charging circuit is relatively large, the impedance on the charging circuit will affect the communication signal. If a smaller resistance value is incorporated in the charging circuit, although the impedance of the charging circuit does not meet the optimal impedance, it does not affect the communication signal, so it is also possible not to adjust and match the impedance. The appropriate preset threshold can be set through experimental testing. Generally, the resistance switching units in each charging gun are the same, so the loop currents corresponding to each charging gun are also the same. The charging pile management platform can compare the loop current of any charging gun with the preset standard current, or it can compare the loop currents of all charging guns with the preset standard current. The specific details can be determined according to the actual situation, and the embodiments of this manual do not make specific limitations.

[0076] In some embodiments of this specification, before receiving the charging gun and charging data sent by the charging pile, the method further includes:

[0077] Receive the single-gun charging voltage across the milliohm resistor corresponding to the charging gun when the charging pile is charging the single gun;

[0078] According to the single-gun charging voltage and the resistance value of the milliohm resistor corresponding to the charging gun during the single-gun charging, the single-gun charging loop current during the single-gun charging is calculated, and the single-gun charging loop current is used as the preset standard current and stored.

[0079] In the specific implementation process, after the charging pile detects that a charging gun is connected to the charging port, it can determine whether it belongs to a single-gun charging or multi-gun charging scenario based on the message data between the charging gun and the bus. In particular, in the single-gun charging scenario, the impedance of the charging circuit is the optimal impedance, which does not affect the communication signal. The charging pile can communicate with the bus normally and can identify the single-gun charging scenario. When in a single-gun charging scenario, the charging pile can detect the single-gun charging voltage across the milliohm resistor of the resistor switching unit of the charging gun, and send the single-gun charging voltage to the charging pile management platform. Based on the single-gun charging voltage and the resistance value of the milliohm resistor, the charging pile management platform can calculate the single-gun charging circuit current when the single gun is charged, and use the single-gun charging circuit current when the single gun is charged as the preset standard current, and store it as a standard for subsequent judgment of whether the impedance in the charging circuit meets the requirements. When only one charging gun is inserted, the terminal resistance on the charging gun plus the terminal resistance at the BMS end form the optimal communication impedance. The charging pile management platform uses this current as the standard to determine whether it needs to be adjusted. It can quickly identify whether it is necessary to adjust the communication impedance for the bus to ensure the stability of communication when multiple guns are charged.

[0080] After determining that the difference between the loop current of the charging gun and the preset standard current is greater than the preset threshold, and the current scenario is multi-gun parallel charging, and the difference between the impedance in the charging loop and the optimal impedance is relatively large, a switch disconnection indication message for disconnecting the resistor switching switch can be sent to the charging pile. The switch disconnection indication message is used to instruct the charging pile to disconnect the resistor switching switch in the resistor switching unit in all the charging guns, and disconnect the charging gun terminal resistance of all the charging guns from the charging loop.

[0081] S208: Select a charging gun from the parallel charging guns as the target charging gun, and send a switch closing indication message of closing the resistance switching switch to the charging pile corresponding to the target charging gun, wherein the switch closing indication message includes the serial number of the target charging gun, so that the charging pile corresponding to the target charging gun closes the resistance switching switch corresponding to the target charging gun and starts the parallel charging process of the charging pile.

[0082] In the specific implementation process, after determining that the difference between the loop current in the charging circuit and the preset standard current is greater than the preset threshold, the charging pile management platform sends a switch disconnection indication message to the charging pile. After the charging pile disconnects the charging gun terminal resistance of all the parallel charging guns from the charging circuit, the charging pile management platform can select a charging gun from each parallel charging gun as the target charging gun, and send a switch closing indication message of closing the resistance switching switch to the charging pile of the target charging gun, and the switch closing indication message includes the number of the target charging gun. Among them, the number of the charging gun can be issued by the charging pile management platform after the charging pile is connected to the network, and the number of each charging gun is unique. After receiving the switch closing indication message, the charging pile of the target charging gun can close the resistance switching switch in the resistance switching unit corresponding to the target charging gun. Figure 4 Schematic diagram of a multi-gun communication topology structure with a resistor switching unit in one embodiment of this specification, such as Figure 4 As shown, each charging gun's communication port is connected to a resistor switching unit, and the resistor switching unit is connected in parallel between the charging gun and the bus. When the resistor switching switches of all parallel charging guns are disconnected, the charging gun terminal resistors in all charging guns are disconnected from the charging circuit. After the resistor switching switch of the target charging gun is closed, only the charging gun terminal resistor of the target charging gun is connected to the charging circuit, and the resistance value of the milliohm resistor in the resistor switching unit connected to each charging gun is relatively small, and the resistance value can be ignored. In this way, the entire charging circuit is equivalent to only connecting the charging gun terminal resistor of the target charging gun, which is similar to the impedance in the charging circuit of the single-gun charging scenario, so that the impedance in the charging circuit meets the optimal impedance requirement. At this time, it can be detected that the loop current in the charging circuit corresponding to the charging gun has returned to normal and is close to the preset standard current, so the charging pile can start the charging pile parallel charging process. After the parallel charging is completed, the charging pile management platform sends an indication of the closing of the resistor switching switch after the parallel charging gun is unplugged, and the resistor switching switches of all charging guns are closed for subsequent use.

[0083] Among them, the charging pile parallel charging process can be understood as the process of multi-gun parallel charging, such as: the parallel charging guns can communicate with each other through the S+ / S- interface of the vehicle-side charging socket, and receive the parallel charging identification message of each charging gun. The charging pile distinguishes the master and slave guns through the parallel charging rules, and sends the parallel charging handshake success status to the platform to start the parallel charging mode. The charging pile parallel charging process can be determined according to actual needs, and the embodiments of this specification do not make specific limitations.

[0084] In addition, different rules may be set for selecting the target charging gun according to actual needs, such as randomly selecting a parallel charging gun as the target charging gun, which is not specifically limited in the embodiments of this specification.

[0085] In some embodiments of this specification, the charging data of the charging gun includes the serial number of the parallel charging gun, and selecting a charging gun from the parallel charging guns as a target charging gun includes:

[0086] According to the serial numbers of the parallel charging guns, a charging gun with the largest number or the smallest number is selected as the target charging gun.

[0087] In the specific implementation process, when the charging pile sends the charging gun charging data to the charging pile management platform, the numbers of each parallel charging gun can be sent together. When selecting the target charging gun, the charging pile management platform can select the charging gun with the largest or smallest number as the target charging gun based on the numbers of each parallel charging gun. Each charging gun has the same resistance value and circuit structure. The solution of the embodiment of the present invention can be used to simply and quickly determine the charging gun that needs to close the resistance switching switch, thereby improving the speed of the charging pile parallel charging data processing.

[0088] The embodiment of this specification provides a data processing method for parallel charging of charging piles, in which a resistance switching unit is set in the communication port of each charging gun, and a milliohm resistor, a charging gun terminal resistor and a normally closed resistance switching switch are set in the resistance switching unit. When charging, by detecting the loop current in the charging gun, the loop current is compared with the preset standard current to identify whether the impedance in the current charging loop is too small. When the impedance in the charging loop is too small due to the parallel charging of multiple guns, which will cause the communication signal to be unstable, the charging pile management platform sends a switch disconnection indication message to the charging piles of all the parallel charging guns, disconnects the resistance switching switches of all the charging guns, and thus disconnects the charging gun terminal resistors of all the charging guns from the charging loop. Then select a target charging gun, close the resistance switching switch of the target charging gun, so that only the charging gun terminal resistance of the target charging gun is connected to the charging circuit. In this way, in a multi-gun charging scenario, only the charging gun terminal resistance of the target charging gun is connected to the charging circuit, and other charging guns are only connected to the milliohm resistor. Because the resistance value of the milliohm resistor is relatively small, the impact on the impedance can be ignored, thereby ensuring that the resistance value in the charging circuit meets the optimal impedance, ensuring the stable transmission of the charging communication signal, and ensuring the stability of multi-gun parallel charging. In addition, by controlling the resistance switching switch in the resistance switching unit in the charging gun, the size of the impedance matched to the charging circuit can be flexibly adjusted, realizing the flexible adjustment of the charging circuit impedance, and ensuring the stable transmission of the charging communication signal.

[0089] In some embodiments of the present specification, after the difference between the loop current and the preset standard current is greater than a preset threshold, the method further includes:

[0090] Obtaining the number of the parallel charging guns, and if the number of the parallel charging guns is greater than 2, sending a switch disconnection indication message of disconnecting the resistor switching switch to the charging pile;

[0091] If the number of the parallel charging guns is equal to 2, one charging gun is directly selected from the parallel charging guns as the switching charging gun, and a switch disconnection instruction information of disconnecting the resistance switching switch is sent to the charging pile corresponding to the switching charging gun, so that the charging pile corresponding to the switching charging gun disconnects the resistance switching switch of the switching charging gun and starts the parallel charging process of the charging pile.

[0092] In the specific implementation process, referring to the records of the above embodiments, in the scenario of multiple charging guns, when the loop current in the charging circuit is too large, that is, the impedance in the charging circuit is too small, it is necessary to adjust the impedance in the charging circuit, and only one charging gun terminal resistor in the charging gun needs to be connected to the charging circuit to meet the requirements of the optimal impedance. Because the resistor switching switch in the resistor switching unit of the charging gun is normally closed, based on this, the embodiments of this specification generally need to disconnect the resistor switching switches of all charging guns first, and then select the resistor switching switch of a target charging gun to close. However, for the scenario of charging two charging guns in parallel, first disconnect all the resistor switching switches, and then close one resistor switching switch, and the process is relatively cumbersome. Therefore, in some scenario examples of this specification, when the charging pile management platform determines that the difference between the charging gun loop current and the preset standard current is greater than the preset threshold value, indicating that the impedance in the charging loop is too small, the number of parallel charging guns can be obtained first. If the number of parallel charging guns is greater than 2, a switch disconnection indication message of disconnecting the resistor switching switch can be sent to the charging piles of all parallel charging guns, the resistor switching switches of all charging guns are disconnected, and then the resistor switching switch of a target charging gun is selected to be closed. For the specific process, please refer to the records of the above embodiment, which will not be repeated here. If the number of parallel charging guns is 2, that is, it belongs to the two-gun parallel charging scenario, then one charging gun can be directly selected from the two parallel charging guns as the switching charging gun, and a switch disconnection indication message of disconnecting the resistor switching switch is sent to the charging pile corresponding to the switching charging gun, so that the charging pile of the switching charging gun can disconnect the resistor switching switch of the switching charging gun, so that only the charging gun terminal resistance of one charging gun can be left in the charging loop, so that the impedance of the charging loop meets the optimal impedance requirement. The selection of the charging gun to be switched can be any selection, or the charging gun with the largest or smallest number can be selected. The selection method is not specifically limited in the embodiments of this specification.

[0093] Specifically, the charging data processing process of two-gun charging can be referred to as follows:

[0094] When the charging gun is plugged in, it sends a charging message to the bus to communicate with other charging guns, making the bus state non-idle. According to the characteristics of the CAN bus, when the CAN bus is not idle, the voltage difference between CAN_H and CAN_L is 2V. At this time, the resistor switching switch in the resistor switching unit is normally closed, and the terminal resistor of the charging gun is connected in parallel between CAN_H and CAN_L. Current is generated in the loop. The charging pile detects the voltage between the two ends of the milliohm resistor in real time, and calculates the current in the loop through Ohm's law. The charging pile uploads the calculated current of the charging gun to the charging pile management platform in real time, and the charging pile management platform records the data. When there is only one charging gun inserted, the charging gun terminal resistance on the charging gun plus the terminal resistance at the BMS end form the optimal communication impedance. The charging pile management platform uses this current as the standard to determine whether it needs to be adjusted. When the second charging gun is plugged into the same vehicle, an additional charging gun terminal resistance is connected in parallel to the loop. At this time, the loop current increases, and the charging pile still uploads the loop current of the charging loop where the charging gun is located in real time. At this time, the platform detects that the loop current has increased, which is not the current formed by the optimal impedance. At this time, the charging pile management platform can send instructions to disconnect the resistor switching to the charging pile according to the rule of number size. The charging pile management platform can send instructions to disconnect the resistor switching to the charging pile with a large gun number, or send instructions to disconnect the resistor switching to the charging pile with a small gun number. You can choose one of the rules. After the resistor switching of a charging gun is disconnected, the loop is adjusted from three terminal resistors to two terminal resistors, the matching impedance is optimal, and the loop detection current returns to normal. At the same time, the two charging guns recognize each other's parallel charging identification message sent on the bus and the handshake is successful. The platform uploads the parallel charging handshake success mark, and then waits to start charging.

[0095] The embodiment of this description proposes a resistance matching scheme for the scenario of two charging guns in parallel, that is, when it is determined that the loop current in the charging circuit is too large, that is, the impedance in the charging circuit is too small, the number of charging guns in parallel can be obtained first. When there are two charging guns in parallel, one charging gun can be directly selected to disconnect its resistance switching switch, so that the charging gun terminal resistance of only one charging gun is left in the charging circuit, so that the impedance of the charging circuit meets the optimal impedance requirement, and there is no need to disconnect the resistance switching switches of all charging guns and then close one, which simplifies the data processing process and improves the data processing speed of multi-gun charging.

[0096] The embodiment of this specification also provides a data processing method for charging piles and charging piles applicable to charging piles. The charging pile may include at least one charging gun, and each charging gun communication interface may be provided with a resistor switching unit. The resistor switching unit provided in each charging gun communication interface is the same, such as Figure 3As shown, the resistance switching unit may include a milliohm resistor R2, a charging gun terminal resistor R1 and a normally closed resistance switching switch K1, wherein the charging gun terminal resistor R1 is connected in series with the resistance switching switch K1 and then connected in parallel between the positive and negative poles of the charging gun communication interface, the milliohm resistor R2 is connected in series on the main circuit of the charging gun charging circuit, and the opening and closing of the resistance switching switch K1 can control whether the charging gun terminal resistor R1 is connected to the charging circuit of the charging gun. Figure 5 FIG. 1 is a schematic diagram of a data processing flow of a charging pile when performing multi-gun charging in an embodiment of the present specification. Figure 5 As shown, the data processing method of the charging pile and charging may include:

[0097] S502: When it is detected that the charging gun is connected to the charging port of the device to be charged, circuit data in the charging circuit of the charging gun is detected.

[0098] In a specific implementation process, after the charging pile detects that a charging gun is inserted into the charging port, it can detect the circuit data of the charging circuit where the charging gun is located, wherein the circuit data may include voltage data, current data, etc. in the charging circuit where the charging pile is located.

[0099] In some embodiments of this specification, when detecting that the charging gun is connected to the charging port of the device to be charged, detecting circuit data in the charging circuit of the charging gun includes:

[0100] When it is detected that the charging gun is connected to the charging port of the device to be charged, the voltage across the charging gun terminal resistor corresponding to the charging gun is detected;

[0101] Calculate the current passing through the charging gun terminal resistor corresponding to the charging gun according to the voltage across the charging gun terminal resistor corresponding to the charging gun to obtain the impedance current of the charging gun;

[0102] The impedance current is used as circuit data of the charging gun.

[0103] In the specific implementation process, Figure 3 As shown, when the charging gun is inserted into the charging port, the charging pile can detect the voltage across the milliohm resistor R2 in the resistor switching unit in the communication port of the charging gun. Based on the voltage and the resistance value of the milliohm resistor, the impedance current of the milliohm resistor in the charging circuit where the charging gun is located can be obtained, and the impedance current is sent to the charging gun management platform as the circuit data of the charging gun. In this way, the charging gun management platform can obtain the parallel charging gun that charges the same device to be charged according to the device identification of the device to be charged corresponding to the charging gun, and judge whether the impedance in the current charging circuit meets the requirements based on the impedance current of the parallel charging gun, thereby laying a theoretical foundation for the impedance adjustment of the subsequent charging circuit.

[0104] S504: Send the circuit data and the device identification of the device to be charged corresponding to the charging gun as charging gun charging data to the charging pile management platform; so that the charging pile management platform obtains the loop current of the charging gun based on the charging gun charging data, and compares the loop current of the charging gun with the preset standard current. The charging gun is a charging gun that charges the same device to be charged.

[0105] In the specific implementation process, after the charging pile detects the circuit data in the charging loop where the charging gun is located, it can obtain the identification of the device to be charged corresponding to the charging gun based on the message data between the charging gun and the bus. When the charging pile sends the charging data of the charging gun to the charging pile management platform, it can send the device identification of the device to be charged corresponding to the charging gun and the circuit data corresponding to the detected charging gun together. Based on the device identification of the device to be charged, the charging pile management platform can treat the charging guns that charge the same device to be charged as parallel charging guns, and put the charging gun charging data of the parallel charging guns together for easy subsequent processing. Alternatively, if the charging gun can communicate normally and can receive message data, the charging pile can also directly package the circuit data of the charging guns that charge the same device to be charged and the device identification of the device to be charged corresponding to the charging gun, and send them to the charging pile management platform as charging gun charging data.

[0106] The charging data of the charging gun sent by the charging pile may include the circuit data of the charging gun. If the circuit data includes the current of the charging circuit where the charging gun is located, then the charging pile management platform can directly obtain the current for charging the same device to be charged from the circuit data according to the device identifier of the device to be charged corresponding to the charging gun as the circuit current of the parallel charging gun. If the charging pile uses the voltage across the milliohm resistor in the resistor switching unit corresponding to the detected charging gun as the circuit data of the charging gun, then the charging pile management platform can calculate the loop current of the charging circuit where the charging gun is located based on the voltage and the resistance value of the milliohm resistor. After the charging pile management platform obtains the loop current in the charging circuit where the parallel charging gun is located, it can compare the loop current of each parallel charging gun with the preset standard current. Based on the size of the loop current and the preset standard current, it can be judged whether the impedance in the current charging circuit meets the requirements and whether the impedance needs to be adjusted. Among them, the preset standard current can be understood as the current in the charging circuit when the communication circuit has the best impedance when the charging pile is charging, which can generally be the current in the charging circuit where the charging gun is located when a single gun is charging.

[0107] In some embodiments of this specification, the method further includes:

[0108] When charging a single gun, detect the charging voltage of the single gun across the milliohm resistor corresponding to the charging gun;

[0109] Calculate the single-gun charging circuit current when the single-gun is charging according to the single-gun charging voltage and the resistance value of the milliohm resistor corresponding to the charging gun when the single-gun is charging;

[0110] The single-gun charging loop current is sent to the charging pile management platform, so that the charging pile management platform stores the single-gun charging loop current as the preset standard current.

[0111] In the specific implementation process, after the charging pile detects that a charging gun is connected to the charging port, it can determine whether it belongs to a single-gun charging or multi-gun charging scenario based on the message data between the charging gun and the bus. In particular, in the single-gun charging scenario, the impedance of the charging circuit is the optimal impedance, which does not affect the communication signal. The charging pile can communicate with the bus normally and can identify the single-gun charging scenario. When in a single-gun charging scenario, the charging pile can detect the single-gun charging voltage across the milliohm resistor of the resistor switching unit of the charging gun. Based on the single-gun charging voltage and the resistance value of the milliohm resistor, the single-gun charging circuit current during single-gun charging can be calculated. The charging pile sends the calculated single-gun charging circuit current to the charging pile management platform. The charging pile management platform can use the single-gun charging circuit current during single-gun charging as the preset standard current and store it as a standard for subsequent judgment of whether the impedance in the charging circuit meets the optimal situation.

[0112] When only one charging gun is plugged in, the terminal resistance on the charging gun plus the terminal resistance on the BMS end forms the optimal communication impedance. The charging pile management platform uses this current as the standard to determine whether adjustment is needed. It can quickly identify whether the communication impedance needs to be adjusted for the bus to ensure the stability of communication when multiple guns are charging simultaneously.

[0113] S506: Receive the switch disconnection indication information sent by the charging pile management platform, and disconnect all the resistance switching switches corresponding to the charging guns according to the switch disconnection indication information; the switch disconnection indication information is sent by the charging pile management platform after determining that the difference between the loop current and the preset standard current is greater than a preset threshold.

[0114] In the specific implementation process, the charging pile management platform can send a switch disconnection instruction information of disconnecting the resistor switching switch to the charging pile after determining that the difference between the loop current of the parallel charging gun and the preset standard current is greater than the preset threshold, and the current scenario is multi-gun parallel charging, and the difference between the impedance in the charging loop and the optimal impedance is relatively large. The charging pile disconnects the resistor switching switch in the resistor switching unit of all the parallel charging guns according to the switch disconnection instruction information, and disconnects the charging gun terminal resistors of all the parallel charging guns from the charging circuit.

[0115] S508: Receive switch closing indication information sent by the charging pile management platform to close the resistance switching switch corresponding to the target charging gun, and close the resistance switching switch corresponding to the target charging gun according to the switch closing indication information; the switch closing indication information includes the serial number of the target charging gun.

[0116] In the specific implementation process, the charging pile management platform sends a switch disconnection indication message to the charging pile. After the charging pile disconnects the charging gun terminal resistance of all the parallel charging guns from the charging circuit, the charging pile management platform can select a charging gun from each parallel charging gun as the target charging gun, and send a switch closing indication message of closing the resistance switching switch to the charging pile of the target charging gun. After the charging pile of the target charging gun receives the switch closing indication message, it can close the resistance switching switch in the resistance switching unit corresponding to the target gun. At this time, only the charging gun terminal resistance of the target charging gun is connected to the charging circuit, and the resistance value of the milliohm resistor in the resistance switching unit connected to each charging gun is relatively small, and the resistance value can be ignored. In this way, the entire charging circuit is equivalent to connecting only the charging gun terminal resistance of the target charging gun, which is similar to the impedance in the charging circuit of the single-gun charging scenario, so that the impedance in the charging circuit meets the optimal impedance requirement.

[0117] S510: Start the charging pile and start the charging process.

[0118] In the specific implementation process, when the impedance in the charging circuit meets the requirements, the charging gun can perform charging communication normally, and the charging pile can start the charging pile parallel charging process. The charging pile parallel charging process is not specifically limited in this embodiment of the specification. After the parallel charging is completed, the charging pile management platform can send an indication of the closing of the resistance switching switch to the charging pile. After receiving the indication, the charging pile can close the resistance switching switches of all charging guns for subsequent use.

[0119] Figure 6 This is a schematic diagram of a scenario in which a vehicle has multiple guns and is charged simultaneously in one embodiment of this specification. Figure 7 This is a schematic diagram of data interaction between the charging pile management platform and the charging pile in a charging pile and charging scenario in one embodiment of this specification. Figure 6-Figure 7 The data processing process of adjusting the charging circuit impedance in a multi-gun charging scenario in the embodiment of this specification is specifically described as follows:

[0120] like Figure 6 As shown in the figure, in this scenario, there are 4 charging guns charging the vehicle, each charging gun is equipped with a resistor switching unit, the charging gun terminal resistance in each resistor switching unit is set to 120 ohms, and the resistance of the milliohm resistor is set to 100 milliohms. Figure 6-Figure 7As shown in the figure, when multiple charging guns are plugged into the charging socket of the same vehicle at the same time, the charging guns send a parallel charging identification message to the CAN bus. At this time, the parallel charging identification between the charging guns may fail due to communication impedance. The charging pile detects the voltage across the milliohm resistor in the resistance switching unit of each charging gun, and calculates the current of the charging communication circuit of each charging gun according to Ohm's law and uploads it to the charging pile management platform. The standard matching impedance current calculated when only one charging gun is plugged in is used To indicate that, in a scenario example in this manual, the calculation obtains , which is the preset standard current. Figure 6 In the charging pile, each charging gun is equipped with a resistor switching unit. When charging gun 1, charging gun 2, charging gun 3, and charging gun 4 are simultaneously inserted into the charging socket of the same vehicle, five 120-ohm terminal resistors are connected in parallel in the circuit, and the equivalent impedance is about 24 ohms. The charging pile detects the voltages V1 and V2 at both ends of the milliohm resistors of the charging communication CAN circuit of charging gun 1, charging gun 2, charging gun 3, and charging gun 4 respectively. The resistance of the milliohm resistor is 100 milliohms. According to Ohm's law, the impedance current of the communication circuit matching of charging gun 1, charging gun 2, charging gun 3, and charging gun 4 is calculated. In a scenario example in this manual, the current in the communication circuit of the charging gun is calculated to be about 83mA. Figure 7 As shown, after the charging pile transmits the current value calculated by each gun to the charging pile management platform, the charging pile management platform compares the received loop current of each charging gun with the preset standard current, and finds that the loop current of each charging gun 83mA is much greater than the preset standard current 33mA. The charging pile management platform sends a switch disconnection indication message to the charging pile corresponding to the charging guns that are currently 83mA, and disconnects the resistance switching switch of charging gun 1, charging gun 2, charging gun 3, and charging gun 4. Then, select a target charging gun, such as taking the charging gun with the largest number as the target charging gun, and send a switch closing indication message to the charging pile of the target charging gun to close the resistance switching switch of the target charging gun. If charging gun 4 has the largest number, the resistance switch of charging gun 4 is closed. At this time, the communication circuit should have the best matching impedance of 60 ohms. Charging guns 1, 2, 3, and 4 can communicate with each other through the S+ / S- interface of the vehicle-side charging socket. After receiving the parallel charging identification message of each gun, the charging pile distinguishes the master and slave guns through the parallel charging rules, and sends the parallel charging handshake success status to the platform, waiting for the subsequent start of parallel charging. After the subsequent parallel charging is completed and the gun is pulled out, the charging pile management platform sends an instruction to close the resistance switch, and closes the resistance switches of all charging guns for subsequent use.

[0121] The embodiment of this specification provides a data processing method for charging piles and charging in parallel. The current current of the CAN bus is determined by voltage collection, and then the current matching impedance on the bus is confirmed. Then, the resistors in the loop are switched in an orderly manner through the scheduling control of the charging pile management platform, avoiding the problems of random switching and inaccurate switching. Finally, the charging handshake success mark of the charging pile is received to confirm the successful preparation for charging in parallel. Without affecting the charging of a single gun, the problem of incompatibility of the CAN bus terminal resistance caused by multi-gun charging in parallel can be well solved, which improves the stability of communication during multi-gun charging and ensures that multi-gun charging can proceed normally.

[0122] In some embodiments of the present specification, a charging pile charging system may also be provided, the system comprising: a charging pile management platform, at least one charging pile, the charging pile comprising at least one charging gun, each charging gun communication interface being provided with a resistance switching unit, the resistance switching unit comprising a milliohm resistor, a charging gun terminal resistor and a normally closed resistance switching switch, the charging gun terminal resistor being connected in series with the resistance switching switch and then connected in parallel between the positive and negative electrodes of the charging gun communication interface, the milliohm resistor being connected in series with the main circuit of the charging gun charging circuit, and the charging pile being communicatively connected with the charging pile management platform;

[0123] After the charging pile detects that the charging gun is connected to the charging port of the device to be charged, the charging pile detects the circuit data in the charging circuit of the charging gun, and sends the circuit data and the device identification of the device to be charged corresponding to the charging gun as charging data of the charging gun to the charging pile management platform;

[0124] The charging pile management platform obtains the loop current of the parallel charging gun according to the received charging data of the charging gun, and compares the loop current of the parallel charging gun with a preset standard current. If the difference between the loop current and the preset standard current is greater than a preset threshold, a switch disconnection indication information of disconnecting the resistor switching switch is sent to the charging pile; the parallel charging gun is a charging gun that charges the same device to be charged;

[0125] The charging pile disconnects all the resistor switching switches corresponding to the charging guns according to the switch disconnection indication information;

[0126] The charging pile management platform selects a charging gun from the parallel charging guns as a target charging gun, and sends a switch closing indication information of a closing resistor switching switch to the charging pile corresponding to the target charging gun, wherein the switch closing indication information includes the serial number of the target charging gun;

[0127] After receiving the switch closing indication information, the charging pile corresponding to the target charging gun closes the resistance switching switch corresponding to the target charging gun and starts the charging pile parallel charging process.

[0128] In the specific real-time process, such as Figure 6 As shown, the charging pile charging system provided in some embodiments of this specification may include a charging pile management platform and at least one charging pile, each charging pile may include at least one charging gun, and each charging gun communication interface may be provided with a resistor switching unit, and the resistor switching unit provided in each charging gun communication interface is the same. Figure 3 As shown, the resistor switching unit may include a milliohm resistor R2, a charging gun terminal resistor R1, and a normally closed resistor switching switch K1, wherein the charging gun terminal resistor R1 is connected in series with the resistor switching switch K1 and then connected in parallel between the positive and negative electrodes of the charging gun, and the milliohm resistor R2 is connected in series to the main circuit of the charging gun charging circuit, and the opening and closing of the resistor switching switch K1 can control whether the charging gun terminal resistor R1 is connected to the charging circuit of the charging gun. Among them, the data processing flow of the charging pile and the charging pile management platform when performing multi-gun charging can refer to the records of the above embodiment, which will not be repeated here.

[0129] Figure 8 is a block diagram of another electronic device for data processing of charging piles provided in an embodiment of the present application. The electronic device may be a terminal or a server, and its internal structure diagram may be as shown in FIG. Figure 8 As shown. The electronic device includes a processor, a memory and a network interface connected via a system bus. Among them, the processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the electronic device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a data processing method for charging a charging pile is implemented.

[0130] Those skilled in the art will understand that Figure 8 The structure shown in the figure is merely a block diagram of a partial structure related to the scheme of the present disclosure, and does not constitute a limitation on the electronic device to which the scheme of the present disclosure is applied. The specific electronic device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0131] In an exemplary embodiment, an electronic device is also provided, including: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions to implement the data processing method for charging piles and charging in an embodiment of the present disclosure.

[0132] In an exemplary embodiment, a computer-readable storage medium is also provided. When the instructions in the storage medium are executed by a processor of an electronic device, the electronic device can execute the data processing method for charging piles and charging in the embodiment of the present disclosure.

[0133] In an exemplary embodiment, a computer program product or a computer program is also provided, the computer program product or the computer program including computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the data processing method for charging piles and charging provided in the above-mentioned various optional implementations.

[0134] It is understandable that in the specific implementation of this application, user-related data is involved. When the above embodiments of this application are applied to specific products or technologies, user permission or consent is required, and the collection, use and processing of relevant data need to comply with relevant laws, regulations and standards of relevant countries and regions.

[0135] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0136] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0137] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A data processing method for charging piles and charging simultaneously, characterized in that: A resistor switching unit is provided in each charging gun communication interface of the charging pile, and the resistor switching unit includes a milliohm resistor, a charging gun terminal resistor and a normally closed resistor switching switch. The charging gun terminal resistor is connected in series with the resistor switching switch and then connected in parallel between the positive and negative electrodes of the charging gun communication interface. The milliohm resistor is connected in series to the main circuit of the charging gun charging circuit. The method includes: receiving a single-gun charging voltage at both ends of the milliohm resistor corresponding to the charging gun during single-gun charging sent by the charging pile; Calculate the single-gun charging circuit current when the single-gun is charging according to the single-gun charging voltage and the resistance value of the milliohm resistor corresponding to the charging gun when the single-gun is charging, use the single-gun charging circuit current as a preset standard current, and store it; Receiving charging data of a charging gun sent by the charging pile, wherein the charging data of the charging gun includes: circuit data in a charging circuit of the charging gun and a device identifier of a device to be charged corresponding to the charging gun; Obtaining a loop current of a parallel charging gun according to the charging data of the charging gun, wherein the parallel charging gun is a charging gun that charges the same device to be charged; Compare the loop current of the parallel charging gun with the preset standard current, and if the difference between the loop current and the preset standard current is greater than a preset threshold, send a switch disconnection instruction message of disconnecting the resistance switching switch to the charging pile, so that the charging pile disconnects the resistance switching switches corresponding to all the parallel charging guns; A charging gun is selected from the parallel charging guns as the target charging gun, and a switch closing indication information of closing the resistance switching switch is sent to the charging pile corresponding to the target charging gun, wherein the switch closing indication information includes the serial number of the target charging gun, so that the charging pile corresponding to the target charging gun closes the resistance switching switch corresponding to the target charging gun and starts the parallel charging process of the charging pile.

2. The method according to claim 1, characterized in that When the difference between the loop current and the preset standard current is greater than a preset threshold, the method further includes: Obtaining the number of the parallel charging guns, and if the number of the parallel charging guns is greater than 2, sending a switch disconnection indication message of disconnecting the resistor switching switch to the charging pile; If the number of the parallel charging guns is equal to 2, one charging gun is directly selected from the parallel charging guns as the switching charging gun, and a switch disconnection instruction information of disconnecting the resistance switching switch is sent to the charging pile corresponding to the switching charging gun, so that the charging pile corresponding to the switching charging gun disconnects the resistance switching switch of the switching charging gun and starts the parallel charging process of the charging pile.

3. The method according to claim 1, characterized in that The circuit data in the charging circuit of the charging gun includes: the voltage across the milliohm resistor corresponding to the charging gun; the circuit current of the charging gun obtained and charged according to the charging data of the charging gun includes: Calculate the current passing through the milliohm resistor corresponding to the charging gun according to the voltage across the milliohm resistor corresponding to the charging gun and the resistance value of the milliohm resistor to obtain the impedance current of the charging gun; According to the device identifier of the device to be charged corresponding to the charging gun, the impedance current of the charging gun charging the same device to be charged is used as the loop current of the parallel charging gun.

4. The method according to claim 1, characterized in that: The charging gun charging data also includes the serial number of the parallel charging guns, and the step of selecting a charging gun from the parallel charging guns as a target charging gun includes: According to the serial numbers of the parallel charging guns, a charging gun with the largest number or the smallest number is selected as the target charging gun.

5. A data processing method for charging piles and charging simultaneously, characterized in that: A resistor switching unit is provided in each charging gun communication interface of the charging pile, and the resistor switching unit includes a milliohm resistor, a charging gun terminal resistor and a normally closed resistor switching switch. The charging gun terminal resistor is connected in series with the resistor switching switch and then connected in parallel between the positive and negative electrodes of the charging gun communication interface. The milliohm resistor is connected in series to the main circuit of the charging gun charging circuit. The method includes: When it is detected that the charging gun is connected to the charging port of the device to be charged, circuit data in the charging circuit of the charging gun is detected; The circuit data and the device identification of the device to be charged corresponding to the charging gun are sent to the charging pile management platform as charging gun charging data; so that the charging pile management platform obtains the loop current of the charging gun based on the charging gun charging data, and compares the loop current of the charging gun with a preset standard current, and the charging gun is a charging gun that charges the same device to be charged; Receive the switch disconnection indication information sent by the charging pile management platform, and disconnect all the resistance switching switches corresponding to the charging guns according to the switch disconnection indication information; the switch disconnection indication information is sent by the charging pile management platform after determining that the difference between the loop current and the preset standard current is greater than a preset threshold; Receiving switch closing indication information for closing the resistance switching switch corresponding to the target charging gun sent by the charging pile management platform, and closing the resistance switching switch corresponding to the target charging gun according to the switch closing indication information; the switch closing indication information includes the serial number of the target charging gun; Start the charging station and start the charging process.

6. The method according to claim 5, characterized in that When it is detected that the charging gun is connected to the charging port of the device to be charged, detecting circuit data in the charging circuit of the charging gun includes: When it is detected that the charging gun is connected to the charging port of the device to be charged, the voltage across the charging gun terminal resistor corresponding to the charging gun is detected; Calculate the current passing through the charging gun terminal resistor corresponding to the charging gun according to the voltage across the charging gun terminal resistor corresponding to the charging gun to obtain the impedance current of the charging gun; The impedance current is used as circuit data of the charging gun.

7. The method according to claim 5, characterized in that The method further comprises: When charging a single gun, detect the charging voltage of the single gun across the milliohm resistor corresponding to the charging gun; Calculate the single-gun charging circuit current when the single-gun is charging according to the single-gun charging voltage and the resistance value of the milliohm resistor corresponding to the charging gun when the single-gun is charging; The single-gun charging loop current is sent to the charging pile management platform, so that the charging pile management platform stores the single-gun charging loop current as the preset standard current.

8. A charging pile charging system, characterized in that: The system comprises: a charging pile management platform, at least one charging pile, the charging pile comprises at least one charging gun, each charging gun communication interface is provided with a resistance switching unit, the resistance switching unit comprises a milliohm resistor, a charging gun terminal resistor and a normally closed resistance switching switch, the charging gun terminal resistor is connected in series with the resistance switching switch and then connected in parallel between the positive and negative electrodes of the charging gun communication interface, the milliohm resistor is connected in series with the main circuit of the charging gun charging circuit, and the charging pile is in communication connection with the charging pile management platform; After the charging pile detects that the charging gun is connected to the charging port of the device to be charged, the charging pile detects the circuit data in the charging circuit of the charging gun, and sends the circuit data and the device identification of the device to be charged corresponding to the charging gun as charging data of the charging gun to the charging pile management platform; The charging pile management platform receives the single-gun charging voltage at both ends of the milliohm resistor corresponding to the charging gun during single-gun charging sent by the charging pile, and calculates the single-gun charging loop current during single-gun charging according to the single-gun charging voltage and the resistance value of the milliohm resistor corresponding to the charging gun during single-gun charging, takes the single-gun charging loop current as a preset standard current and stores it, then obtains the loop current of the parallel charging gun according to the received charging data of the charging gun, and compares the loop current of the parallel charging gun with the preset standard current, and if the difference between the loop current and the preset standard current is greater than a preset threshold, sends a switch disconnection indication information of disconnecting the resistor switching switch to the charging pile; the parallel charging gun is a charging gun that charges the same device to be charged; The charging pile disconnects all the resistor switching switches corresponding to the charging guns according to the switch disconnection indication information; The charging pile management platform selects a charging gun from the parallel charging guns as a target charging gun, and sends a switch closing indication information of a closing resistor switching switch to the charging pile corresponding to the target charging gun, wherein the switch closing indication information includes the serial number of the target charging gun; After receiving the switch closing indication information, the charging pile corresponding to the target charging gun closes the resistance switching switch corresponding to the target charging gun and starts the charging pile parallel charging process.

9. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the data processing method for charging piles according to any one of claims 1 to 7.

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