Charging communication device for electric vehicle

Abstract

The utility model provides a charging communication device for an electric vehicle, and the device comprises a power line carrier unit U2 which is connected with a power receiving bar so as to carry out the wired communication with a charging pile through the power receiving bar; the wireless communication unit U3 is in wireless communication with the charging pile; the processing unit U1 is in communication connection with the power line carrier unit U2 and the wireless communication unit U3, wired communication is achieved through the power line carrier unit U2, wireless communication is achieved through the wireless communication unit U3, and therefore the electric vehicle can conduct wired communication and wireless communication at the same time in the charging process, and the communication stability is effectively improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of communication, and relates to a charging communication technology for an electric vehicle. BACKGROUND

[0002] The electric vehicle charges through a power receiving row, which is a high-efficiency and fast charging method. The power receiving row is usually fixedly installed on the roof of the electric vehicle, and the charging bow on the charging pile is contacted through the power receiving row, so that the charging bow delivers direct-current electric energy to the electric vehicle, thereby realizing fast charging. In this charging process, the electric vehicle needs to monitor its charging state, and sends a corresponding charging request to the charging pile based on its state, that is, the electric vehicle and the charging pile need to communicate during the charging process.

[0003] In the prior art, the electric vehicle and the charging pile generally communicate through a wireless manner, so as to communicate before the charging bow and the power receiving row are contacted, thereby facilitating accurate butt joint of the charging bow and the power receiving row. However, the wireless communication is easily affected by environmental factors, for example, the shielding object or bandwidth limitation will affect the stability of the communication process, thereby causing communication interruption or data transmission error, and resulting in poor communication reliability.

[0004] Therefore, how to improve the communication reliability between the electric vehicle and the charging pile is an urgent problem to be solved by those skilled in the art. SUMMARY

[0005] The application aims to provide a charging communication device for an electric vehicle, which is used to solve the problem that in the prior art, when the electric vehicle and the charging pile communicate wirelessly, the stability of the communication process is poor due to the influence of environmental factors, thereby causing communication interruption or data transmission error, and resulting in poor communication reliability.

[0006] In a first aspect, the application provides a charging communication device for an electric vehicle, which is arranged in the electric vehicle and connected with a power receiving row located at the top end of the electric vehicle, and comprises:

[0007] A power carrier unit U2 is connected with the power receiving row, so as to perform wired communication between the power receiving row and the charging pile;

[0008] A wireless communication unit U3 performs wireless communication with the charging pile;

[0009] A processing unit U1 is in communication connection with the power carrier unit U2 and the wireless communication unit U3 respectively.

[0010] The application realizes wired communication between the electric vehicle and the charging pile through the power carrier unit U2, and realizes wireless communication between the electric vehicle and the charging pile through the wireless communication unit U3, so as to avoid communication error or interruption between the electric vehicle and the charging pile due to environmental interference, and further ensure the communication stability between the electric vehicle and the charging pile during charging, so as to assist the safe charging process of the electric vehicle.

[0011] In an embodiment of the application, a power-receiving row monitoring unit is further included, which is arranged on the power-receiving row and is in communication connection with the processing unit U1.

[0012] In an embodiment of the application, the power-receiving row monitoring unit includes a voltage measurement sub-unit U6, which is arranged on the power-receiving row and is connected with the processing unit U1.

[0013] In an embodiment of the application, the power-receiving row monitoring unit includes a temperature measurement sub-unit, which is arranged on the power-receiving row and is connected with the processing unit U1.

[0014] In an embodiment of the application, the power carrier unit U2 includes a coupling transformer, which is arranged on the power-receiving row.

[0015] In an embodiment of the application, the temperature measurement sub-unit includes a resistance temperature sensor.

[0016] In an embodiment of the application, an antenna control unit is further included, which is arranged on the power-receiving row, performs wireless communication with the charging pile, and is in communication connection with the processing unit U1 through the wireless communication unit U3.

[0017] In an embodiment of the application, the antenna control unit includes:

[0018] an antenna sub-unit arranged on the power-receiving row and in communication connection with the processing unit U1, which performs wireless communication with the charging pile;

[0019] a direction adjustment sub-unit connected with the antenna sub-unit to adjust the signal receiving direction of the antenna sub-unit.

[0020] In an embodiment of the application, a charging communication unit U4 is further included, which is connected with the processing unit U1 and is in communication connection with a battery management system.

[0021] In an embodiment of the application, a whole vehicle communication unit U5 is further included, which is connected with the processing unit U1 and is in communication connection with a whole vehicle control system.

[0022] As described above, this application provides a charging communication device for electric vehicles, which performs wired communication through a power line carrier unit U2 and wireless communication through a wireless communication unit U3. This avoids communication errors or interruptions caused by environmental interference during the communication process between the electric vehicle and the charging pile when only wireless communication is used, thereby improving the communication stability and safety of the electric vehicle during the charging process, thus ensuring the charging safety of the electric vehicle and facilitating the practical application of electric vehicle charging methods. Attached Figure Description

[0023] Figure 1 The diagram shown is a structural schematic of a power receiving bus and a charging pantograph as described in an embodiment of this application.

[0024] Figure 2 The diagram shown is a structural schematic of a charging communication device according to an embodiment of this application.

[0025] Figure 3 The diagram shown is a structural schematic of an antenna control unit according to an embodiment of this application.

[0026] Figure 4 The diagram shown is a structural schematic of another charging communication device described in an embodiment of this application.

[0027] Figure 5 The diagram shown is a schematic diagram of the connection structure between a temperature measurement subunit and a power bus as described in an embodiment of this application.

[0028] Figure 6 The diagram shown is a connection structure diagram of a voltage measurement subunit U6 according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures

[0030] 100: Electric vehicle; 110: Power receiving bus; 111: Resistance temperature sensor; 121: Antenna subunit; 122: Direction adjustment subunit; 130: Battery management system; 140: Vehicle control system; 200: Charging pile; 210: Charging pantograph. Detailed Implementation

[0031] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0032] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0033] The following embodiments of this application provide a charging communication device for electric vehicles, used to realize communication between the electric vehicle and the charging pile during DC charging. In existing pantograph-based charging technologies, the electric vehicle and the charging pile typically communicate wirelessly. However, wireless communication is susceptible to environmental factors; for example, obstructions may interfere with the signal, or bandwidth limitations during high-volume charging may affect communication stability, leading to communication interruptions or data transmission errors, thus impacting the continuity and reliability of the charging process. Therefore, this application provides a charging communication device for electric vehicles that transmits charging communication data to a processing unit U1 via wired communication through a power line carrier unit U2, and wireless communication data is transmitted to the processing unit U1 via wireless communication through a wireless communication unit U3. This allows the electric vehicle and the charging pile to simultaneously perform wireless and wired communication, improving communication reliability during the charging process and facilitating the stable operation of the electric vehicle's DC charging process.

[0034] The following will describe in detail the principle and implementation of a charging communication device for electric vehicles according to the present embodiment, with reference to the accompanying drawings, so that those skilled in the art can understand the charging communication device for electric vehicles according to the present embodiment without creative effort.

[0035] like Figure 1 As shown, the power receiving bus 110 is installed on the top of the electric vehicle 100 and connected to the battery pack to transmit DC power to the battery pack. The charging pantograph 210 is mounted on the charging pile 200 via a lifting mechanism to output DC power from the charging pile 200. Specifically, when the electric vehicle 100 needs to be charged, the charging pantograph 210 on the charging pile 200 descends using the lifting mechanism, thereby contacting the power receiving bus 110 on the electric vehicle 100, so that the charging pile 200 can supply DC power to the electric vehicle 100. It should be noted that during the charging process, the electric vehicle 100 and the charging pile 200 typically need to communicate based on a charging communication protocol to ensure the safe operation of the charging process. The charging communication protocol refers to the standardized communication process and data format for data exchange and control between the charging pile 200 and the electric vehicle 100.

[0036] To avoid interference from environmental factors on wireless communication and cause instability in the communication process between the electric vehicle 100 and the charging pile 200, this embodiment provides a charging communication device for electric vehicles, which enables the electric vehicle 100 and the charging pile 200 to conduct wireless and wired communication simultaneously during the charging process. This avoids communication interruption or data transmission errors when wireless communication is interfered with, improves the stability of communication during the charging process, and facilitates the DC charging process.

[0037] Specifically, such as Figure 2 As shown, the charging communication device provided in this application includes a processing unit U1, and a power line carrier unit U2 and a wireless communication unit U3 communicatively connected to the processing unit U1. The processing unit U1 is used to process and analyze communication data, specifically controlling the communication process between the charging pile 200 and the electric vehicle 100 based on a charging communication protocol. The power line carrier unit U2 is used to realize wired communication between the electric vehicle 100 and the charging pile 200. The wireless communication unit U3 is used to realize wireless communication between the electric vehicle 100 and the charging pile 200. Based on this, the charging communication device provided in this application, through the power line carrier unit U2 and the wireless communication unit U3, enables simultaneous wireless and wired communication between the electric vehicle 100 and the charging pile 200, thereby improving communication reliability during the charging process.

[0038] For example, such as Figure 2 As shown, the processing unit U1 is an NXP S32K148 series microcontroller chip, based on the OppCharge standard charging communication protocol, which monitors and manages the communication process between the electric vehicle 100 and the charging pile 200. The power line carrier unit U2 includes a Qualcomm QCA7005 power line carrier communication module, connected to the processing unit U1 via an SPI interface, and transmits data via power line carrier based on the HomePlug standard, thus enabling wired communication between the electric vehicle 100 and the charging pile 200. The wireless communication unit U3 is a TI CC3235 WIFI communication module, connected to the processing unit U1 via SPI and UART interfaces, and has wireless transceiver capabilities to enable wireless communication between the electric vehicle 100 and the charging pile 200. Based on this, the processing unit U1 transmits data to the charging pile 200 through the power line carrier unit U2 and the wireless communication unit U3 respectively, thereby enabling simultaneous wired and wireless communication between the electric vehicle 100 and the charging pile 200.

[0039] The charging communication device provided in this application enhances the reliability of the communication process by simultaneously performing wired and wireless communication. Specifically, when the wired communication channel and the wireless communication channel transmit the same communication data simultaneously, the processing unit U1 performs corresponding analysis and processing based on the communication data of either the wired or wireless communication channel; when either the wired or wireless communication channel is interrupted, the processing unit U1 performs corresponding analysis and processing based on the communication data of the other channel; when the wired and wireless communication channels transmit different communication data simultaneously, the processing unit U1 performs corresponding analysis and processing based on the communication data in the wired communication channel. This is because wired communication has low latency and is less susceptible to interference; therefore, the data in the wired communication channel is more accurate. When a data transmission error occurs in either the wired or wireless communication channel, corresponding analysis and processing is performed based on the communication data in the other communication channel.

[0040] Furthermore, since the transmission methods are completely different, the probability of simultaneous interruption or data transmission errors in wired and wireless communication channels is extremely small. Based on this, by simultaneously conducting wired and wireless communication and comparing and verifying the data from the two channels, the reliability of the communication process can be effectively improved, avoiding the instability of a single communication method from affecting the normal operation of the communication process.

[0041] It should be noted that, in order to improve the communication effect of wireless communication, the charging communication device provided in this embodiment also includes an antenna control unit disposed on the power receiving bus 110. The antenna control unit has wireless data transceiver function to receive communication data from the charging pile 200 and transmit communication data from the processing unit U1 to the charging pile 200. Specifically, the antenna control unit includes an antenna subunit. Through the transceiver function of the antenna subunit, it acquires communication data from the charging pile 200 and transmits it to the processing unit U1, and receives communication data from the processing unit U1 and transmits it to the charging pile 200. This improves the efficiency and accuracy of data transmission between the electric vehicle 100 and the charging pile 200, thereby enhancing the communication effect of wireless communication between the electric vehicle 100 and the charging pile 200.

[0042] Furthermore, the antenna subunit transmits data with the processing unit U1 through the wireless communication unit U3 to realize the communication connection between the antenna subunit and the processing unit U1.

[0043] To further improve the stability of the wireless communication process and thus enhance the communication security between the electric vehicle 100 and the charging pile 200, in some optional embodiments, the antenna control unit further includes a direction adjustment subunit connected to the antenna subunit to adjust the signal receiving direction of the antenna subunit. For example, as... Figure 3As shown, the antenna control unit includes an antenna subunit and a direction adjustment subunit. The antenna subunit includes multiple antennas, each with signal transmission and reception capabilities. The direction adjustment subunit includes multiple radio frequency (RF) control switches, each corresponding to one of the antennas. By controlling the on / off states of these switches, multiple antennas can be combined to form a desired integrated radiation pattern, thereby improving the data reception capability of the antenna subunit. The direction adjustment subunit adjusts the radiation pattern of the antenna subunit so that the main lobe of the antenna subunit faces the wireless data transmission unit of the charging pile 200, exemplarily towards the charging pantograph 210, avoiding directions with numerous obstructions. This reduces communication interference, improves communication quality, and effectively enhances the stability of the wireless communication process.

[0044] In some optional implementations, the power line carrier unit U2 is communicatively connected to the power supply monitoring unit via a CP (Control Pilot) line and a PE (Protective Earthing) line, thereby acquiring data from the power supply monitoring unit via power line carrier and transmitting it to the processing unit U1, or transmitting data from the processing unit U1 to the power supply monitoring unit via power line carrier, thus realizing data transmission between the processing unit U1 and the power supply monitoring unit.

[0045] In some optional embodiments, the power line carrier unit U2 includes a coupling transformer (not shown in the figure), which is disposed on the power receiving bus 110 and transmits signals through electromagnetic induction between multiple coils. Specifically, the power line carrier unit U2 couples communication data through the coupling transformer so that the power line carrier unit U2 can acquire relevant data and transmit it on the CP and PE lines.

[0046] It should be noted that during the charging process of the electric vehicle 100, the battery management system 130 needs to control and manage the charging status of the battery. The battery management system 130 is used to monitor and manage the battery pack in the electric vehicle 100. Based on this, the communication data between the electric vehicle 100 and the charging pile 200 includes charging data during the charging process. The charging communication device sends this charging data to the battery management system 130 so that the battery management system 130 can monitor and manage the battery charging status based on the charging data. For example, the charging data includes the output voltage and output current of the charging pile 200, the current voltage of the battery, and whether the battery is fully charged.

[0047] Specifically, such as Figure 4As shown, the charging communication device provided in this embodiment also includes a charging communication unit U4 connected to the processing unit U1. The charging communication unit U4 is communicatively connected to the battery management system 130 and is used to transmit the charging data from the processing unit U1 to the battery management system 130 so that the battery management system 130 can monitor the battery charging status based on the charging data during the charging process.

[0048] Furthermore, the charging communication unit U4 is also used to transmit the data processed by the battery management system 130 to the processing unit U1. The processing unit U1 can control the charging process based on the data from the battery management system 130, so as to realize the management of the battery charging process by the battery management system 130, that is, the battery management system 130 can manage the battery charging status based on the charging data in the charging process.

[0049] It should be noted that, since the battery management system 130 generally transmits data via a bus, the charging communication unit U4 is also used to transmit and receive charging data transmitted via bus, wireless, and power line carrier. Specifically, the processing unit converts the format of charging data transmitted wirelessly and via power line carrier, and the charging communication unit U4 transmits it to the battery management system 130 via bus. Similarly, the charging communication device is also used to transmit data from the battery management system 130 transmitted via bus to the processing unit U1, and then convert it into data for wireless or power line carrier transmission before sending it to the charging pile 200.

[0050] For example, such as Figure 4 As shown, the charging communication unit U4 is an NXP TJA1050T chip, used to transmit data from the processing unit U1 to the battery management system 130 via a bus, or to transmit data transmitted via a bus to the processing unit U1, so as to realize the communication connection between the processing unit U1 and the battery management system 130.

[0051] To further ensure safety during the charging process of electric vehicle 100, in some optional embodiments, the communication data between electric vehicle 100 and charging pile 200 includes pantograph status data. The charging communication device provided in this embodiment is also used to transmit this data to the vehicle control system 140, so that the vehicle control system 140 can monitor and manage the vehicle's operating status based on the pantograph status data. The vehicle control system 140 refers to the core control component in electric vehicle 100, which controls the vehicle's operating status by monitoring vehicle status information. For example, the pantograph status data includes data information such as the pantograph being at the top, during the pantograph descent, and when the pantograph is fully lowered.

[0052] Specifically, the charging communication device provided in this embodiment further includes a vehicle communication unit U5 connected to the processing unit U1. The vehicle communication unit U5 is communicatively connected to the vehicle control system 140 to transmit charging data from the processing unit U1 to the vehicle control system 140. Based on this, the vehicle control system 140 can adaptively adjust the state of the electric vehicle 100 based on the state of the charging pantograph 210 to facilitate the charging process of the electric vehicle 100.

[0053] Furthermore, the vehicle control system 140 also displays the vehicle status to the driver based on the status data of the charging pantograph 210, in order to assist the driver in the driving process and improve driving convenience.

[0054] Similarly, since the vehicle control system 140 generally transmits data via a bus, the vehicle communication unit U5 is also used to transmit charging data from the processing unit U1 to the vehicle control system 140 via a bus, or to transmit data from the vehicle control system 140 to the processing unit U1. For the specific transmission process and principle, please refer to the data transmission method of the aforementioned charging communication unit U4, which will not be repeated here. For example, the vehicle communication unit U5 includes an NXP TJA1050T chip for implementing data transmission via a bus.

[0055] In some optional embodiments, the charging communication device provided in this embodiment further includes a power supply monitoring unit disposed on the power supply bar 110. The power supply monitoring unit is communicatively connected to the processing unit U1 and is used to monitor the status of the power supply bar 110 to ensure the safety of the electric vehicle 100 during the charging process. It should be noted that the power supply monitoring unit achieves communication with the processing unit U1 through an electrical connection. Specifically, data transmission is achieved through DC signals to achieve communication with the processing unit U1.

[0056] Specifically, the power supply bus monitoring unit is used to monitor the temperature status of the power supply bus 110 to prevent it from overheating and causing danger. Specifically, the power supply bus monitoring unit includes a temperature measurement subunit, which is installed on the power supply bus 110 and connected to the processing unit U1. This allows the processing unit U1 to acquire and analyze the temperature data of the power supply bus 110, thereby preventing it from overheating. For example, the temperature measurement subunit includes a resistance temperature sensor 111, such as a PT1000 temperature sensor. Figure 5 As shown, the temperature measurement subunit is connected to the positive and negative terminals of the power supply bus 110 for real-time monitoring of the temperature rise of the power supply bus 110. Of course, the temperature measurement subunit may also include other types of temperature sensors, and this application does not impose specific limitations here.

[0057] Furthermore, the power supply monitoring unit is also used to monitor the contact status between the power supply 110 and the charging pantograph 210, preventing poor contact between the power supply 110 and the charging pantograph 210 from affecting the normal charging of the electric vehicle 100. Specifically, the power supply monitoring unit includes a voltage measurement subunit U6, which is installed on the power supply 110 and communicatively connected to the processing unit U1. The voltage measurement subunit U6 measures the voltage value on the power supply 110, determines the contact status between the power supply 110 and the charging pantograph 210, and transmits the data to the processing unit U1 for analysis and timely prompting. Specifically, when the voltage on the power supply 110 is not 0 and is within a preset range, the power supply 110 and the charging pantograph 210 are in good contact, and the charging process continues; when the voltage on the power supply 110 is 0 or other abnormal values, there is poor contact between the power supply 110 and the charging pantograph 210, prompting the driver or the control equipment of the electric vehicle 100 to check. Specifically, the voltage measurement subunit U6 is connected between the CP (Control Pilot) node and the PE (Protective Earthing) node of the power supply busbar 110 to measure the voltage data of the power supply busbar 110. For example, as shown... Figure 6 As shown, the voltage measurement subunit U6 is an ADUM3190WSRQZ chip used to measure the voltage on the feedback power supply 110.

[0058] Furthermore, the voltage measurement subunit U6, connected between the CP node and PE node of the power receiving bus 110, is also used to check the grounding status of the power receiving bus 110 to ensure electrical safety during the charging process.

[0059] In summary, the charging communication device provided in this application enables wired communication between the electric vehicle 100 and the charging pile 200 simultaneously through a power line carrier unit U2 and wireless communication through a wireless communication unit U3. Since the transmission methods of wired and wireless communication are completely different, the probability of simultaneous interruption or data transmission errors in both channels is extremely low. This effectively ensures the communication stability of the electric vehicle 100 during charging, thereby improving the safety of charging and facilitating the smooth operation of charging.

[0060] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.

[0061] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A charging communication device for an electric vehicle, disposed inside the electric vehicle and connected to a power receiving bus located at the top of the electric vehicle, characterized in that, include: The power line carrier unit U2 is connected to the power receiving bus to enable wired communication between the power receiving bus and the charging pile. The wireless communication unit U3 communicates wirelessly with the charging pile. The processing unit U1 is communicatively connected to the power line carrier unit U2 and the wireless communication unit U3, respectively.

2. The charging communication device according to claim 1, characterized in that, It also includes a power supply monitoring unit, which is installed on the power supply and is communicatively connected to the processing unit U1.

3. The charging communication device according to claim 2, characterized in that, The power receiving bus monitoring unit includes a voltage measurement subunit U6, which is disposed on the power receiving bus and is communicatively connected to the processing unit U1.

4. The charging communication device according to claim 2, characterized in that, The power receiving bus monitoring unit includes a temperature measurement subunit, which is installed on the power receiving bus and is communicatively connected to the processing unit U1.

5. The charging communication device according to claim 2, characterized in that, The power line carrier unit U2 includes a coupling transformer, which is installed on the power receiving bus.

6. The charging communication device according to claim 4, characterized in that, The temperature measurement subunit includes a resistance temperature sensor.

7. The charging communication device according to claim 1, characterized in that, It also includes an antenna control unit, which is installed on the power receiving busbar, communicates wirelessly with the charging pile, and communicates with the processing unit U1 through the wireless communication unit U3.

8. The charging communication device according to claim 7, characterized in that, The antenna control unit includes: An antenna subunit is disposed on the power receiving bus and is communicatively connected to the processing unit U1. The antenna subunit communicates wirelessly with the charging pile. A direction adjustment subunit is connected to the antenna subunit to adjust the signal receiving direction of the antenna subunit.

9. The charging communication device according to claim 1, characterized in that, It also includes a charging communication unit U4, which is connected to the processing unit U1, and the charging communication unit U4 is communicatively connected to the battery management system.

10. The charging communication device according to claim 1, characterized in that, It also includes a vehicle communication unit U5, which is connected to the processing unit U1, and the vehicle communication unit U5 is communicatively connected to the vehicle control system.

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