Alternating current charging pile communication system

Abstract

The utility model provides an AC charging pile communication system. The system comprises a CAN module, a vehicle machine module and an AC charging pile device. The vehicle machine module comprises a first interface; the first end of the CAN module is in communication connection with the vehicle machine module through the first interface, and the second end of the CAN module is in communication connection with the alternating current charging pile equipment; the vehicle machine module is used for sending the charging information of the vehicle to the CAN module through the first interface; the CAN module is used for receiving the charging information sent by the vehicle machine module and transmitting the charging information to the alternating current charging pile equipment; and the AC charging pile device adjusts the charging state of the vehicle according to the received charging information.

Description

TECHNICAL FIELD

[0001] The utility model relates to alternating current charging pile technical field especially relates to a kind of alternating current charging pile communication system. BACKGROUND

[0002] The information interaction of alternating current charging pile and vehicle end can only be interacted by the size of control pilot (CP) signal, and the CP signal only has the information of maximum chargeable current from alternating current charging pile to vehicle end, and vehicle end transmits charging state by changing the voltage size of CP signal, such as CP signal is 6V, and vehicle end normal charging.And for some state information (i.e. charging information) of vehicle end, alternating current charging pile cannot effectively obtain, so as to hardly guarantee the safety in vehicle charging process. SUMMARY

[0003] Therefore, the utility model provides a kind of alternating current charging pile communication system, can obtain the charging information of vehicle, and then improve the charging safety of vehicle.

[0004] The technical scheme of the utility model is realized as follows:

[0005] The utility model provides a kind of alternating current charging pile communication system, and the system includes: CAN module, car machine module and alternating current charging pile equipment;Car machine module includes first interface;

[0006] The first end of CAN module is communicatedly connected with car machine module by first interface, and the second end of CAN module is communicatedly connected with alternating current charging pile equipment;

[0007] Car machine module is used to send the charging information of vehicle to CAN module by first interface;

[0008] CAN module is used to receive the charging information sent by car machine module, and transmit charging information to alternating current charging pile equipment;

[0009] Alternating current charging pile equipment adjusts the charging state of vehicle according to received charging information.

[0010] In the above system, the system further includes: control module;

[0011] The first end of control module is communicatedly connected with the second end of CAN module by first serial interface;The second end of control module is communicatedly connected with alternating current charging pile equipment;

[0012] CAN module is also used to convert charging information into first signal, and transmit first signal to control module;

[0013] Control module is used to transmit received first signal to alternating current charging pile equipment;

[0014] The alternating current charging pile device is also configured to parse the charging information from the first signal and adjust the charging state of the vehicle according to the charging information.

[0015] In the system, the system further comprises a communication module;

[0016] The communication module is in communication connection with the second end of the control module through a second serial interface, and the communication module establishes a wireless communication connection with the alternating current charging pile device;

[0017] The control module is also configured to parse the charging information from the first signal, convert the charging information into a first instruction, and transmit the first instruction to the communication module;

[0018] The communication module is configured to receive the first instruction sent by the control module, convert the first instruction into a wireless signal corresponding to the charging information, and transmit the wireless signal to the alternating current charging pile device.

[0019] In the system, the alternating current charging pile device is also configured to reduce the charging limit provided by the alternating current charging pile device for the vehicle in a case where the received charging information is battery temperature information and the battery temperature information is greater than a first threshold value.

[0020] In the system, the alternating current charging pile device is also configured to disconnect the charging connection between the alternating current charging pile device and the vehicle in a case where the received charging information is battery power information and the battery power information is greater than a second threshold value, or the received charging information is battery charging current information and the battery charging current information is greater than a third threshold value.

[0021] In the system, the system further comprises a power supply module, and the power supply module comprises a delay circuit, the delay circuit comprising a first resistor, a first capacitor and a body diode.

[0022] The first end of the first resistor is connected to a power supply, the second end of the first resistor is connected to the first end of the first capacitor, and the second end of the first capacitor is grounded; the first end of the body diode is connected to the second end of the first capacitor, the second end of the body diode is grounded, and the third end of the body diode is connected to the first end of the first capacitor.

[0023] In the system, the power supply is configured to provide a charging voltage for the first capacitor through a first branch in which the first resistor is located.

[0024] The body diode is configured to drive a branch in which the body diode is located to be conductive in a case where the charging voltage of the first capacitor is greater than the driving voltage of the body diode.

[0025] The power supply is also configured to supply power to a subsequent circuit of the branch in which the body diode is located in a case where the branch in which the body diode is located is conductive.

[0026] In the system, the CAN module comprises a noise suppression module, the noise suppression module comprising a second resistor, a third resistor, a second capacitor, a third capacitor and a fourth capacitor;

[0027] The first end of the second resistor is connected with the first level signal line, the second end of the second resistor is connected with the first end of the third resistor, the second end of the third resistor is connected with the second level signal line, the first end of the second capacitor is connected with the second end of the second resistor, and the second end of the second capacitor is grounded; the first end of the third capacitor is connected with the first end of the first resistor, the second end of the third capacitor is connected with the first end of the fourth capacitor, and the second end of the fourth capacitor is connected with the second end of the third resistor.

[0028] In the system, the second resistor, the third resistor and the second capacitor are used to guide the common mode noise information generated in the process of transmitting the first signal by the CAN module into the ground end, so as to eliminate the common mode noise information.

[0029] The third capacitor and the fourth capacitor are used to guide the differential mode noise information generated in the process of transmitting the first signal by the CAN module into the ground end, so as to eliminate the differential mode noise information.

[0030] In the system, the CAN module further comprises a first diode and a second diode.

[0031] The first end of the first diode is connected with the first level signal line, the second end of the first diode is connected with the first end of the second diode, and the second end of the second diode is connected with the second level signal line.

[0032] The first diode and the second diode are used to guide the electrostatic interference information generated in the CAN module into the ground end under the condition that the first diode and the second diode are turned on, so as to eliminate the electrostatic interference information.

[0033] The utility model provides a kind of AC charging pile communication system, and the system includes: CAN module, car machine module and AC charging pile equipment;Car machine module includes first interface;The first end of CAN module is connected with car machine module by first interface and establishes communication connection, and the second end of CAN module is connected with AC charging pile equipment communication;Car machine module is used to send the charging information of vehicle to CAN module by first interface;CAN module is used to receive the charging information sent by car machine module, and the charging information is transmitted to AC charging pile equipment;AC charging pile equipment adjusts the charging state of vehicle according to the received charging information.The above implementation scheme is used, CAN module is arranged between AC charging pile equipment and car machine module, and the charging information of vehicle in car machine module is transmitted to CAN module by the first interface of CAN module and car machine module, CAN module is connected with AC charging pile by communication, and the charging information of vehicle is transmitted to AC charging pile, so that AC charging pile can obtain the real-time charging information of vehicle, and then the charging state of vehicle is adjusted in real time according to real-time charging information, to improve the safety of vehicle charging using AC charging pile. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 An AC charging pile communication system structure schematic diagram provided by the utility model embodiment Figure 1

[0035] Figure 2 An AC charging pile communication system structure schematic diagram provided by the utility model embodiment Figure 2

[0036] Figure 3 An AC charging pile communication system structure schematic diagram provided by the utility model embodiment Figure 3

[0037] Figure 4 A kind of Bluetooth module structure schematic view provided by the utility model embodiment;

[0038] Figure 5 An AC charging pile communication system structure schematic diagram provided by the utility model embodiment Figure 4

[0039] Figure 6 A kind of delay circuit structure schematic view provided by the utility model embodiment;

[0040] Figure 7 A kind of noise suppression module circuit structure schematic provided by the utility model embodiment Figure 1

[0041] Figure 8 A kind of noise suppression module circuit structure schematic provided by the utility model embodiment​​​​​Figure 2 ;

[0042] Figure 9 The utility model provides an AC-DC circuit module circuit structure schematic diagram. DETAILED DESCRIPTION

[0043] In order to can more detailedly understand the characteristics and technical content of the utility model embodiment, the technical scheme of the utility model is further elaborated below in conjunction with the drawings and specific embodiments of the specification, the drawings are only for reference, and are not used to limit the embodiments of the utility model.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used herein are only for the purpose of describing the embodiments of the utility model, not intended to limit the utility model.

[0045] In the following description, "some embodiments" are described, which describe a subset of all possible embodiments, but it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict. It should be pointed out that the terms "first / second / third" involved in the embodiments of the utility model are only used to distinguish similar objects, and do not represent the specific order of the objects. Understandably, "first / second / third" can be interchanged with specific order or sequence as allowed, so that the embodiments of the utility model described here can be implemented in an order other than illustrated or described here.

[0046] The charging pile is divided into DC charging pile and AC charging pile, the DC charging pile and the vehicle machine system can communicate through the controller area network (CAN) bus and the vehicle machine, obtain the charging current, charging temperature and charging progress of the battery and other information, the AC charging pile only CP line can communicate with the on-board charger (OBC) of the vehicle machine.

[0047] During the charging process of the vehicle, the charging current of the battery is determined by the on-board OBC, and the AC charging pile only has a few functions, such as the display of the voltage and current of the power supply, so it cannot obtain the charging information of the vehicle, such as the battery capacity, temperature and actual charging current of the battery. The AC charging pile also cannot know where the current of the AC charging pile is applied by the vehicle, and how much the actual battery charging current is.

[0048] The battery of the vehicle is abnormal to cause the occurrence of safety problems, mostly when the battery power is relatively high, because the higher the battery voltage, the more active the internal substances are, and it is more likely to be abnormal. Although the AC charging pile only provides AC power for the vehicle system, the actual charging condition is determined by the vehicle OBC, but as the intelligent switch of the vehicle charging, the AC charging pile needs to obtain the actual use of the vehicle battery, and cut off the input source in the first time when the vehicle OBC or the battery is abnormal, to avoid further loss.

[0049] The specific implementation scheme of the AC charging pile obtaining the charging information of the vehicle is shown in the following embodiments:

[0050] The utility model embodiment provides a kind of AC charging pile communication system 1, as shown in Figure 1 It includes: CAN module 10, car machine module 11 and AC charging pile equipment 12;Car machine module 11 includes first interface. Specifically, the first end of CAN module is connected with car machine module by first interface, and the second end of CAN module is connected with charging pile module.

[0051] Car machine module is used to send the charging information of vehicle to CAN module by first interface;CAN module is used to receive the charging information sent by car machine module, and transmit the charging information to AC charging pile equipment;AC charging pile equipment adjusts the charging state of vehicle according to the received charging information.

[0052] In the utility model embodiment, car machine module can be car machine CAN system.

[0053] In the utility model embodiment, first interface can be CAN communication interface of car machine module.

[0054] In the utility model embodiment, the charging information of vehicle can include: battery temperature information of vehicle, battery power information of vehicle and battery charging current information of vehicle.

[0055] It should be noted that the charging information of vehicle is not limited to the above-mentioned three charging information, and other charging information of vehicle battery also belongs to the protection range of the utility model embodiment.

[0056] In the utility model embodiment, CAN module is connected with car machine module of vehicle by CAN communication interface, and information transmission is carried out between vehicle to obtain the charging information of vehicle.

[0057] In the embodiment of the utility model, the battery temperature information, the battery power information and / or the battery charging information of the vehicle are transmitted to the CAN module through the CAN communication interface of the vehicle machine module, and the CAN module further transmits the received battery temperature information, the battery power information and / or the battery charging information of the vehicle to the alternating current charging pile equipment.

[0058] In the embodiment of the utility model, after the alternating current charging pile equipment obtains the charging information from the vehicle machine module through the CAN module, the alternating current charging pile equipment determines whether to continue to provide the charging current for the vehicle or to perform the charging limit operation on the vehicle according to the charging information.

[0059] It should be noted that the alternating current charging pile can automatically adjust according to the received charging information.

[0060] It can be understood that the alternating current charging pile communication system provided by the embodiment of the application can transmit the charging information of the vehicle in the vehicle machine module to the CAN module through the first interface of the CAN module and the vehicle machine module, transmit the obtained charging information of the vehicle to the alternating current charging pile through the communication connection between the CAN module and the alternating current charging pile, so that the alternating current charging pile can obtain the real-time charging information of the vehicle, and then adjust the charging state of the vehicle in real time according to the real-time charging information, thereby improving the safety of the vehicle when charging by using the alternating current charging pile.

[0061] In an embodiment, as shown in Figure 2 The alternating current charging pile communication system further comprises a control module, the first end of the control module is in communication connection with the second end of the CAN module through the first serial interface, and the second end of the control module is in communication connection with the alternating current charging pile equipment.

[0062] The CAN module is further used for converting the charging information into a serial port signal and transmitting the serial port signal to the control module, the control module is used for transmitting the received serial port signal to the alternating current charging pile equipment, and the alternating current charging pile equipment is further used for analyzing the charging information from the serial port signal and adjusting the charging state of the vehicle according to the charging information.

[0063] In the embodiment of the utility model, the control module is a micro control unit (MCU).

[0064] In the embodiment of the utility model, the first signal is a serial port signal.

[0065] In the embodiment of the utility model, the CAN module and the MCU module are connected, and the serial instructions are sent through the serial interface for communication.

[0066] In the embodiment of the utility model, CAN module converts the charging information into CAN message corresponding to the charging information after receiving the charging information sent by the car machine module, and when CAN module transmits the charging information to MCU module, the converted CAN message is converted into serial port signal and transmitted to MCU module.

[0067] In the embodiment of the utility model, MCU module further transmits the received serial port signal to AC charging pile equipment, and finally AC charging pile equipment analyzes the current charging information of the vehicle according to the received serial port signal, and adjusts the charging state of the vehicle according to different charging information.

[0068] In an embodiment, as shown in Figure 3 The communication module is in wireless communication connection with the AC charging pile equipment through the second serial port interface.

[0069] The control module is further used for analyzing the charging information from the first signal and converting the charging information into a first instruction, and transmitting the first instruction to the communication module.

[0070] In the embodiment of the utility model, the communication module can be Bluetooth or Wi-Fi.

[0071] In the embodiment of the utility model, MCU and Bluetooth or Wi-Fi communicate through the serial port interface.

[0072] In the embodiment of the utility model, after the charging information of the vehicle obtained by the CAN module is transmitted to MCU, MCU can further transmit the charging information to Bluetooth or Wi-Fi, and send the charging information to the AC charging pile equipment through Bluetooth or Wi-Fi.

[0073] In the embodiment of the utility model, MCU module analyzes the charging information from the serial port signal, and MCU module converts the charging information into AT instruction and sends the AT instruction to Bluetooth or Wi-Fi through the serial port interface.

[0074] In the embodiment of the utility model, Bluetooth or Wi-Fi and the AC charging pile equipment communicate through wireless mode, and Bluetooth or Wi-Fi converts the received AT instruction into wireless signal and transmits the wireless signal to the AC charging pile. The AC charging pile further analyzes the charging information from the received wireless signal and adjusts the charging state of the vehicle.

[0075] In an embodiment, as shown in Figure 4 the communication module is in wireless communication connection with the AC charging pile equipment through the second serial port interface.Figure 4 The specific circuit component connection relationship diagram of the Bluetooth module in the embodiment of the utility model is shown in the figure, and the specific connection relationship of each circuit component of the Bluetooth module can be seen from the figure. Figure 4 As shown in the figure, through the circuit connection relationship diagram of the Bluetooth module, the AT instruction received from the MCU module is converted into a wireless signal and sent externally (that is, the AT instruction is converted into a wireless signal and sent to the alternating current charging pile device in the embodiment of the utility model).

[0076] It should be noted that the connection of the Bluetooth module is used to realize the Bluetooth communication principle, which can refer to the specific structure realization in Figure 4 , and will not be described here.

[0077] It should be noted that the Bluetooth module only transmits the charging information of the vehicle to the bound alternating current charging pile device.

[0078] In an embodiment, the alternating current charging pile device is also used to reduce the charging limit provided by the alternating current charging pile device for the vehicle in the case that the received charging information is battery temperature information and the battery temperature information is greater than a first threshold value.

[0079] In the embodiment of the utility model, the first threshold value can be set according to specific conditions, for example, the first threshold value can be set to be that the battery temperature information of the vehicle does not exceed 70 degrees Celsius.

[0080] In the embodiment of the utility model, when the battery charging temperature of the vehicle is too high, such as exceeding the set first threshold value, because the CAN module can transmit the battery temperature information of the vehicle to the alternating current charging pile device through the MCU module and the Bluetooth or Wi-Fi module, when the alternating current charging pile device obtains the battery temperature information of the vehicle from the Bluetooth or Wi-Fi module, the alternating current charging pile device automatically performs de-rating charging to relieve the battery temperature of the vehicle and avoid the battery temperature of the vehicle exceeding the rated safety range of the battery.

[0081] In an embodiment, the alternating current charging pile device is also used to disconnect the charging connection between the alternating current charging pile device and the vehicle in the case that the received charging information is battery power information and the battery power information is greater than a second threshold value, or the received charging information is battery charging current information and the battery charging current information is greater than a third threshold value.

[0082] In the embodiment of the utility model, after the alternating current charging pile receives the information transmitted from the Bluetooth or Wi-Fi module, further processing is performed, when the battery charging of the vehicle is abnormal (such as the battery charging current information is too large and exceeds the preset charging current information, that is, the third threshold value), if the on-board OBC still continues to charge, the alternating current charging pile cuts off the power supply for the on-board OBC at the first time (that is, immediately), avoiding the risk of battery fire or damage caused by continued charging.

[0083] In the embodiment of the utility model, when the battery of the vehicle is charged to 95% of the power (i.e. the second threshold value) by the alternating current charging pile, the charging of the battery of the vehicle is stopped.

[0084] In the embodiment of the utility model, while meeting the daily driving power demand of the vehicle, the safety of the battery is further ensured, and the abnormality of the battery during the charging process mainly occurs in the problems of overcharge, overcurrent, and overtemperature. The alternating current charging pile limits the power supply current and the charging current of the vehicle-mounted OBC, and after the battery of the vehicle is fully charged, the overvoltage problem will occur if the charging with the charging voltage greater than the battery voltage continues, therefore, the stopping of the charging when the charging power is 95% is more conducive to the protection of the automobile battery. The charging power is disconnected when the power is 95%.

[0085] It should be noted that the value of the second threshold value can also be selected according to the actual situation, and the embodiment of the utility model does not make specific limitations.

[0086] In an embodiment, the alternating current charging pile system further comprises a power module connected with the MCU module, the CAN module, and the Bluetooth / Wi-Fi module, for supplying power to the MCU module, the CAN module, and the Bluetooth / Wi-Fi module.

[0087] Based on this, the overall structure connection diagram of the alternating current charging pile of the utility model is as shown in Figure 5 The functions of each module have been introduced in the above embodiment, and will not be repeated here.

[0088] In an embodiment, the alternating current charging pile system further comprises a power module, and the power module comprises a delay circuit, and the delay circuit comprises a first resistor, a first capacitor, and a body diode.

[0089] The first end of the first resistor is connected with the power supply, the second end of the first resistor is connected with the first end of the first capacitor, and the second end of the first capacitor is grounded; the first end of the body diode is connected with the second end of the first capacitor, the second end of the body diode is grounded, and the third end of the body diode is connected with the first end of the first capacitor.

[0090] In the embodiment of the utility model, the alternating current charging pile system can also use the direct current of the vehicle side, but the vehicle often has pulse voltage at the starting moment, which can cause damage to the equipment due to the instantaneous overvoltage. Therefore, the power-on delay circuit can be added, and during the starting process of the vehicle, the power loop is not turned on, which can avoid the risk of damage to the rear circuit.

[0091] In the embodiment of the utility model, the power-on delay circuit (i.e. the delay circuit) is as shown in Figure 6As shown, the first end of the first resistor R1 is connected to the power supply VCC, the second end of R1 is connected to the first end of the first capacitor C20, the second end of C20 is connected to GND1, the source of the body diode Q1 is connected to the second end of C20, the drain of Q1 is grounded, and the gate of Q1 is connected to the first end of C20.

[0092] The power-on delay circuit further comprises a diode D1 and a subsequent circuit C21 and C22, and the specific connection relationship is shown in Figure 6

[0093] In an embodiment, the power supply is configured to provide a charging voltage for the first capacitor through a first branch in which the first resistor is located; the body diode is configured to drive a branch in which the body diode is located to be conductive when the charging voltage of the first capacitor is greater than a driving voltage of the body diode; and the power supply is further configured to supply power to a subsequent circuit of the branch in which the body diode is located when the branch in which the body diode is located is conductive.

[0094] In the embodiment of the utility model, continuing to refer to the power-on delay circuit shown in Figure 6 R1 and C20 form an RC charging delay circuit, VCC charges C20 through R1, and when the charging voltage of C20 reaches the starting voltage (i.e., the driving voltage) of Q1, Q1 is turned on. After Q1 is turned on, VCC starts to supply power to the branch in which C21 and C22 are located.

[0095] In the embodiment of the utility model, for example, the typical starting voltage of Q1 is 1.1V, if the resistance value of R1 is 10M and C20 is 10uF, the calculation formula of the delay time t provided by the power-on delay circuit is shown in the following formula (1):

[0096] (1)

[0097] Wherein, us is the VCC voltage, and u is the capacitor voltage. Substituting the above formula (1) can obtain: if VCC is 12V and u is 1.1V, .

[0098] It should be noted that the length of the delay time can be adjusted according to the actual demand for resistance and capacitance values, and the embodiment of the utility model does not make specific limitations.

[0099] In the embodiment of the utility model, after the above delay time, Q1 is turned on, and VCC can charge C21 and C22.

[0100] In an embodiment, the CAN module comprises a noise suppression module, and the noise suppression module comprises a second resistor, a third resistor, a second capacitor, a third capacitor and a fourth capacitor.

[0101] ​The first end of the second resistor is connected with the first level signal line, the second end of the second resistor is connected with the first end of the third resistor, the second end of the third resistor is connected with the second level signal line, the first end of the second capacitor is connected with the second end of the second resistor, and the second end of the second capacitor is grounded.

[0102] In the embodiment of the utility model, the first level signal line is high level signal line CANH, and the second level signal line is low level signal line CANL.

[0103] In the embodiment of the utility model, as shown in Figure 7 The first end of the second resistor R3 is connected with CANH, the second end of R3 is connected with the first end of R4, the second end of R4 is connected with CANL, the first end of the second capacitor C23 is connected with the second end of R3, and the second end of C23 is grounded.

[0104] In an embodiment, the second resistor, the third resistor and the second capacitor are used to guide the common mode noise information generated in the process of transmitting the first signal by the CAN module into the ground end to eliminate the common mode noise information, and the third capacitor and the fourth capacitor are used to guide the differential mode noise information generated in the process of transmitting the first signal by the CAN module into the ground end to eliminate the differential mode noise information.

[0105] In the embodiment of the utility model, continuing to refer to the above Figure 7 As shown in the drawing, the car machine module adopts CAN communication, the CAN interface of the CAN module is connected to the CAN communication interface of the car machine module at the vehicle end, R3 and R4 are the matching resistors of the terminal of CAN communication, can enhance the signal quality in the communication process of the CAN module, improve the anti-interference and reliability. R3 and R4 take the same value, usually take 60R, that is, R3+R4=120R. C23 is connected to the intermediate point of R3 and R4, and the common mode noise generated in the CAN module is guided into the ground end through the branch of R3, R4 and C23, so that the common mode noise on the CAN bus is effectively suppressed.

[0106] In the embodiment of the utility model, the differential mode noise generated in the CAN module is guided into the ground through the branch of C24 and C25, so that the differential mode noise on the CAN bus is effectively suppressed.

[0107] It should be noted that the overcharge signal on the transmitted CAN bus can also be effectively reduced through the branch of C24 and C25.

[0108] In an embodiment, the CAN module further comprises: a first diode and a second diode; a first end of the first diode is connected with the first level signal line, a second end of the first diode is connected with a first end of the second diode, and a second end of the second diode is connected with the second level signal line.

[0109] The first diode and the second diode are used to introduce electrostatic interference information generated in the CAN module into the ground end in the case that the first diode and the second diode are turned on, so as to eliminate the electrostatic interference information.

[0110] In the embodiment of the utility model, the first diode and the second diode can be transient voltage suppressor (TVS).

[0111] In the embodiment of the utility model, on the basis of the circuit diagram shown in the above Figure 7 The first TVS tube (i.e. U1) and the second TVS tube (i.e. U2) are added, as shown in the Figure 8 The first end of U1 is connected with CANH, the second end of U1 is connected with the first end of U2, the second end of U2 is connected with CANL, and the middle point of the branch where U1 and U2 are located is connected with the ground.

[0112] In the embodiment of the utility model, in the case that U1 and U2 reach the conduction voltage, the electrostatic interference information generated in the CAN module is introduced into the ground through the branch where U1 and U2 are located, so as to effectively eliminate the electrostatic interference on the CAN bus and avoid damaging the CAN module due to static electricity.

[0113] In an embodiment, the alternating current charging pile communication system further comprises an alternating current to direct current circuit module, because the vehicle is in the process of charging, the alternating current charging pile provides alternating current for the vehicle end on-board OBC power supply, the system contains the alternating current to direct current circuit module, which can be connected at the alternating current power supply or the direct current on the vehicle.

[0114] As shown in the Figure 9 It is the circuit component connection schematic diagram of the alternating current to direct current circuit module, wherein C26, C27, C28, L7 and L8 are alternating current interference suppression circuits, C26 and C27 are common mode capacitors and L7 common mode inductors which jointly form LC noise suppression circuits, C28 and L8 are differential mode capacitors and differential mode inductors respectively, and jointly act to suppress alternating current differential mode noise.

[0115] Based on the above embodiment, the utility model has the following technical advantages: the charging current of the battery of the vehicle, the charging temperature of the battery and the real-time power of the battery can be acquired in real time, the function of the alternating current charging pile is enriched, the utility model is differentiated from the alternating current charging pile on the market, and the alternating current charging pile on the market is effectively distinguished in function.

[0116] In the embodiments provided in the utility model, the structural embodiments described above are only schematic, for example, the division of the modules is only logical function division, and another division mode can be used in actual implementation, for example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0117] The features disclosed in the several method or structural embodiments of the utility model can be combined arbitrarily without conflict to obtain new method embodiments or structural embodiments.

[0118] The above is only some embodiments of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. An alternating current charging station communication system, characterized in that, The system comprises a CAN module, a vehicle machine module and an alternating current charging pile device; the vehicle machine module comprises a first interface; a first end of the CAN module is connected with the vehicle machine module through the first interface, and a second end of the CAN module is connected with the alternating current charging pile device; the vehicle machine module is configured to send charging information of a vehicle to the CAN module through the first interface; the CAN module is configured to receive the charging information sent by the vehicle machine module and transmit the charging information to the alternating current charging pile device, wherein the charging information comprises battery temperature information or battery power information or battery charging current information; the alternating current charging pile device is configured to receive the charging information and adjust the charging state of the vehicle by using an adjustment mode corresponding to the battery temperature information or the battery power information or the battery charging current information contained in the charging information.

2. The system of claim 1, wherein, The system further comprises a control module; a first end of the control module is connected with the second end of the CAN module through a first serial interface, and a second end of the control module is connected with the alternating current charging pile device; the CAN module is further configured to convert the charging information into a first signal and transmit the first signal to the control module; the control module is configured to transmit the received first signal to the alternating current charging pile device; the alternating current charging pile device is further configured to parse the charging information from the first signal and adjust the charging state of the vehicle according to the charging information.

3. The system of claim 2, wherein, The system can further comprise a communication module; the communication module is connected with the second end of the control module through a second serial interface, and the communication module is wirelessly connected with the alternating current charging pile device; the control module is further configured to parse the charging information from the first signal and convert the charging information into a first instruction, and transmit the first instruction to the communication module; the communication module is configured to receive the first instruction sent by the control module, convert the first instruction into a wireless signal corresponding to the charging information, and transmit the wireless signal to the alternating current charging pile device.

4. The system of claim 1, wherein the alternating current charging pile device is further configured to reduce a charging limit provided by the alternating current charging pile device for the vehicle when the received charging information is battery temperature information and the battery temperature information is greater than a first threshold value.

5. The system of claim 1, wherein the alternating current charging pile device is further configured to disconnect the charging connection between the alternating current charging pile device and the vehicle when the received charging information is battery power information and the battery power information is greater than a second threshold value, or the received charging information is battery charging current information and the battery charging current information is greater than a third threshold value.

6. The system of claim 1, wherein, The system further comprises a power supply module, and the power supply module comprises a delay circuit, the delay circuit comprising a first resistor, a first capacitor and a body diode. The first end of the first resistor is connected with a power supply, the second end of the first resistor is connected with the first end of the first capacitor, and the second end of the first capacitor is grounded; the first end of the body diode is connected with the second end of the first capacitor, the second end of the body diode is grounded, and the third end of the body diode is connected with the first end of the first capacitor.

7. The system of claim 6, wherein, The power supply is configured to provide a charging voltage for the first capacitor through a first branch in which the first resistor is located. The body diode is configured to drive a branch in which the body diode is located to be conductive when the charging voltage of the first capacitor is greater than a driving voltage of the body diode. The power supply is further configured to supply power to a circuit at a rear stage of the branch in which the body diode is located when the branch in which the body diode is located is conductive.

8. The system of claim 6, wherein, The CAN module comprises a noise suppression module, and the noise suppression module comprises a second resistor, a third resistor, a second capacitor, a third capacitor and a fourth capacitor. The first end of the second resistor is connected with a first level signal line, the second end of the second resistor is connected with the first end of the third resistor, the second end of the third resistor is connected with a second level signal line, the first end of the second capacitor is connected with the second end of the second resistor, and the second end of the second capacitor is grounded; the first end of the third capacitor is connected with the first end of the first resistor, the second end of the third capacitor is connected with the first end of the fourth capacitor, and the second end of the fourth capacitor is connected with the second end of the third resistor.

9. The system of claim 8, wherein, The second resistor, the third resistor and the second capacitor are configured to guide common mode noise information generated in the process of transmitting a first signal by the CAN module to a ground end to eliminate the common mode noise information. The third capacitor and the fourth capacitor are configured to guide differential mode noise information generated in the process of transmitting the first signal by the CAN module to the ground end to eliminate the differential mode noise information.

10. The system of claim 1, wherein, The CAN module further comprises a first diode and a second diode. The first end of the first diode is connected with the first level signal line, the second end of the first diode is connected with the first end of the second diode, and the second end of the second diode is connected with the second level signal line. The first diode and the second diode are configured to guide electrostatic interference information generated in the CAN module to the ground end to eliminate the electrostatic interference information when the first diode and the second diode are conductive.

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