Remote interaction system

Abstract

The remote interaction system provided by the utility model comprises a battery management device, a power amplifier, a coupling circuit, a discharge cable, a demodulator and a vehicle-mounted controller, the battery management device transmits a first CAN signal, the power amplifier carries out signal amplification on the modulated first CAN signal, the coupling circuit couples the amplified signal, and the discharge cable is connected with the demodulator. The battery management device, the power amplifier and the coupling circuit are arranged on the power bank or the energy storage battery, the discharging cable is electrically connected with the coupling circuit and receives coupled signals, the demodulator is in communication connection with the discharging cable, the demodulator demodulates the coupled signals to obtain second CAN signals, and the second CAN signals are transmitted to the power bank or the energy storage battery. The vehicle-mounted controller is in communication connection with the demodulator, and the vehicle-mounted controller receives the second CAN signal. A signal sent by the battery management device is processed by the coupling circuit so as to prevent the vehicle-mounted controller from being unable to receive the signal.

Description

Technical Field

[0001] The utility model relates to the technical field of communication interaction, and particularly relates to a remote interaction system. Background Art

[0002] With the development of the electrification trend of excavators, various modes such as pure electric, towed electric, and battery swapping for electric excavators have emerged. At present, through the CAN bus, communication between the battery management device and the vehicle-mounted controller on a pure electric vehicle can be achieved. However, to complete the above communication method, the battery management device and the vehicle-mounted controller need to be physically connected together through a twisted pair wire. When the twisted pair wire for communication between the battery management device and the vehicle-mounted controller exceeds 10 m, that is, when the discharge cable exceeds 10 m, it will cause communication failure between the battery management device and the vehicle-mounted controller or the vehicle-mounted controller cannot receive the communication signal sent by the battery management device. In addition, communication methods such as wireless communication and Bluetooth communication between the battery management device and the vehicle-mounted controller will be affected by communication distance or interference, which will also cause signal transmission failure between the battery management device and the vehicle-mounted controller. Content of the Utility Model

[0003] To solve the above technical problems, the present utility model is proposed. An embodiment of the present utility model provides a remote interaction system, which solves the problem that in the prior art, due to the long distance of the discharge cable, communication failure between the battery management device and the vehicle-mounted controller or the vehicle-mounted controller cannot receive the communication signal sent by the battery management device.

[0004] According to one aspect of the present utility model, a remote interaction system is provided, including:

[0005] A battery management device that emits a first CAN signal;

[0006] A power amplifier that amplifies the modulated first CAN signal; wherein, the modulated first CAN signal is a signal formed by the first CAN signal sequentially passing through parsing processing and modulation processing;

[0007] A coupling circuit that couples the amplified signal; wherein, the battery management device, the power amplifier, and the coupling circuit are arranged on a power bank or an energy storage battery;

[0008] A discharge cable that is electrically connected to the coupling circuit and receives the coupled signal;

[0009] A demodulator that is communicatively connected to the discharge cable and demodulates the coupled signal to obtain a second CAN signal;

[0010] Vehicle-mounted controller, the vehicle-mounted controller is communicatively connected with the demodulator, and the vehicle-mounted controller receives the second CAN signal; wherein, the demodulator and the vehicle-mounted controller are arranged on the cab or engine room or electric control cabin of the electric excavator.

[0011] In one embodiment, the coupling circuit includes:

[0012] A first circuit, a first input end of the first circuit is electrically connected to a first DC bus, and a first output end of the first circuit is electrically connected to a second DC bus;

[0013] A second circuit, the second circuit is connected in series with the first circuit, and an output end of the second circuit is electrically connected to an input end of the power amplifier;

[0014] A third circuit, the third circuit is connected in series with the first circuit, and the third circuit is connected in parallel with the second circuit; and

[0015] An analog matching resistor, an input end of the analog matching resistor is connected to an output end of the third circuit.

[0016] In one embodiment, the first circuit includes:

[0017] A first capacitor, an input end of the first capacitor is electrically connected to the first DC bus;

[0018] A second capacitor, an output end of the second capacitor is electrically connected to the second DC bus;

[0019] A first resistor, an input end of the first resistor is electrically connected to an output end of the first capacitor, and an output end of the first resistor is electrically connected to an input end of the second capacitor.

[0020] In one embodiment, the second circuit includes:

[0021] A first series circuit, the first series circuit is connected in series with the first capacitor, and an output end of the first series circuit is electrically connected to an input end of the power amplifier;

[0022] A second series circuit, the second series circuit is connected in series with the second capacitor, and an input end of the second series circuit is electrically connected to an output end of the power amplifier;

[0023] A third series circuit, the third series circuit is respectively connected in series with the first series circuit and the second series circuit.

[0024] In one embodiment, the first series circuit includes:

[0025] A third capacitor, the third capacitor being connected in series with the first capacitor; and

[0026] A second resistor, the second resistor being connected in series with the third capacitor, and an output end of the second resistor being electrically connected to an input end of the power amplifier.

[0027] In one embodiment, the second series circuit includes:

[0028] A fourth capacitor, the fourth capacitor being connected in series with the second capacitor; and

[0029] A third resistor, the third resistor being connected in series with the fourth capacitor, and an input end of the third resistor being electrically connected to an output end of the power amplifier.

[0030] In one embodiment, the third series circuit includes:

[0031] A fourth resistor, the fourth resistor being connected in series with the third resistor;

[0032] A fifth capacitor, the fifth capacitor being connected in series with the fourth resistor;

[0033] A fifth resistor, the fifth resistor being connected in series with the fifth capacitor;

[0034] A sixth resistor, the sixth resistor being connected in series with the fifth resistor and the second resistor respectively.

[0035] In one embodiment, the third circuit includes:

[0036] A fourth series circuit, the fourth series circuit being connected in series with the first circuit;

[0037] A fifth series circuit, the fifth series circuit being connected in series with the fourth series circuit;

[0038] A sixth series circuit, the sixth series circuit being connected in series with the fourth series circuit and an analog matching resistor respectively.

[0039] In one embodiment, the fourth series circuit includes:

[0040] A seventh resistor, the seventh resistor being connected in series with the first circuit;

[0041] A sixth capacitor, the sixth capacitor being connected in series with the seventh resistor;

[0042] An eighth resistor, the eighth resistor being connected in series with the first circuit;

[0043] A seventh capacitor, the seventh capacitor being connected in series with the eighth resistor;

[0044] The first inductor is connected in series with the sixth capacitor and the seventh capacitor respectively.

[0045] In one embodiment, the fifth series circuit includes:

[0046] An eighth capacitor, which is connected in series with the sixth capacitor;

[0047] A ninth capacitor, which is connected in series with the eighth capacitor;

[0048] A tenth capacitor, which is connected in series with the ninth capacitor and the seventh capacitor respectively.

[0049] The remote interaction system provided by the present utility model includes: a battery management device, a power amplifier, a coupling circuit, a discharge cable, a demodulator, and a vehicle-mounted controller. The battery management device emits a first CAN signal, and the power amplifier amplifies the modulated first CAN signal. Among them, the modulated first CAN signal is a signal formed by the first CAN signal successively passing through parsing processing and modulation processing. The coupling circuit couples the amplified signal. Among them, the battery management device, the power amplifier, and the coupling circuit are arranged on a power bank or an energy storage battery. The discharge cable is electrically connected to the coupling circuit. The discharge cable receives the coupled signal. The demodulator is communicatively connected to the discharge cable. The demodulator demodulates the coupled signal to obtain a second CAN signal. The vehicle-mounted controller is communicatively connected to the demodulator. The vehicle-mounted controller receives the second CAN signal. Among them, the demodulator and the vehicle-mounted controller are arranged in the cab or engine room or electric control cabin of the electric excavator. By processing the CAN signal emitted by the battery management device through the power amplifier and the coupling circuit, and sending the processed signal to the discharge cable, it is prevented that signal loss or distortion occurs during the signal transmission of the discharge cable. The discharge cable then sends this signal to the vehicle-mounted controller, thereby completing the communication between the battery management device and the vehicle-mounted controller, so that the vehicle-mounted controller can receive the relatively high-quality or complete communication signal sent by the battery management device. In addition, since different communication protocols or signal level standards are usually used between the vehicle-mounted controller and the battery management device, the coupling circuit can play a role in signal adaptation, converting and matching the signals between the two parties to ensure normal communication between the two parties. Description of the Drawings

[0050] Figure 1 is a schematic structural diagram of a remote interaction system provided by an exemplary embodiment of the present utility model.

[0051] Figure 2 is a schematic structural diagram of the communication between the battery management device and the vehicle-mounted controller provided by an exemplary embodiment of the present utility model.

[0052] Figure 3It is a circuit schematic diagram of a coupling circuit provided by an exemplary embodiment of the present utility model.

[0053] Figure 4 It is a circuit schematic diagram of a first circuit provided by an exemplary embodiment of the present utility model.

[0054] Figure 5 It is a circuit schematic diagram of a second circuit provided by an exemplary embodiment of the present utility model.

[0055] Figure 6 It is a circuit schematic diagram of a third circuit provided by an exemplary embodiment of the present utility model.

[0056] Reference signs in the drawings:

[0057] 11. First circuit; 12. Second circuit; 13. Third circuit; 121. First series circuit; 122. Second series circuit; 123. Third series circuit; 131. Fourth series circuit; 132. Fifth series circuit; 133. Sixth series circuit. Detailed implementation manners

[0058] Next, exemplary embodiments according to the present utility model will be described in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments of the present utility model. It should be understood that the present utility model is not limited by the exemplary embodiments described herein.

[0059] The component names and meanings involved in this application are as follows:

[0060] The high-voltage distribution unit (PDU, Power Distribution Unit) refers to the device used to manage and distribute high-voltage power in an electric excavator. The PDU is usually located in the electrical system of the electric excavator and plays a role in transmitting high-voltage power from the battery pack or other energy sources to each component and system.

[0061] The battery energy distribution unit (Battery energy Distribution Unit, BDU), also known as the battery disconnect unit (Battery Disconnect Unit), is an important accessory in the high-voltage circuit of an electric excavator. It was initially derived from the power distribution unit (Power Distribution Unit, PDU) of the power system. The BDU is directly connected to the power battery through a high-voltage plug-in and controls the charging and discharging processes of the electric excavator. It is a crucial component in the high-voltage circuit.

[0062] The Vehicle Control Unit (VCU) is an important control device in an electric excavator. The VCU is responsible for controlling and managing various functions and systems of the electric excavator, such as the power system, braking system, steering system, etc. It receives information from various sensors and controllers, processes data and makes decisions, and then outputs control signals to control the operating state of the electric excavator.

[0063] The Battery Management System (BMS) is used to manage and monitor the battery pack in the electric excavator. The BMS is responsible for monitoring parameters such as the charge state, temperature, and voltage of the battery pack, and protecting the battery from adverse effects such as overcharging, over-discharging, and overheating. At the same time, the BMS can also provide real-time battery status information to other systems of the electric excavator, such as the VCU, to help optimize the performance and efficiency of the electric excavator and ensure the safe operation and lifespan of the battery pack.

[0064] The CAN signal refers to the information signal transmitted in the Controller Area Network.

[0065] Figure 1 It is a schematic structural diagram of a remote interaction system provided by an exemplary embodiment of the present utility model. Figure 2 It is a schematic structural diagram of communication between the battery management device and the vehicle control unit provided by an exemplary embodiment of the present utility model. As Figure 1 - Figure 2 shown, the remote interaction system includes:

[0066] The battery management device, power amplifier, coupling circuit, discharge cable, demodulator, and vehicle control unit. The battery management device transmits the first CAN signal, and the power amplifier amplifies the modulated first CAN signal. Among them, the modulated first CAN signal is a signal formed by the first CAN signal sequentially passing through parsing processing and modulation processing. The coupling circuit couples the amplified signal. Among them, the battery management device, power amplifier, and coupling circuit are arranged on the power bank or energy storage battery. The discharge cable is electrically connected to the coupling circuit. The discharge cable receives the coupled signal. The demodulator is communicatively connected to the discharge cable. The demodulator demodulates the coupled signal to obtain the second CAN signal. The vehicle control unit is communicatively connected to the demodulator. The vehicle control unit receives the second CAN signal. The demodulator and the vehicle control unit are arranged in the cab or engine room or electric control cabin of the electric excavator.

[0067] In the embodiment of the present utility model, when the battery management device sends a communication signal to the vehicle-mounted controller, the vehicle-mounted controller, the demodulator, and the high-voltage power distribution unit are arranged on the cab, engine room, or electric control cabin of the electric excavator, and the battery management device, the power amplifier, the coupling circuit, and the battery energy distribution unit are arranged on the power bank or the energy storage battery.

[0068] In the embodiment of the present utility model, after the battery management device emits the first CAN signal, it is necessary to perform parsing processing and modulation processing on the first CAN signal in sequence, and then input the modulated first CAN signal into the power amplifier, so that the power amplifier amplifies the modulated first CAN signal. Therefore, in the present utility model, the signals amplified by the power amplifier are all modulated signals.

[0069] When an operator clicks the start button on the electric excavator, a start signal will be generated and sent to the vehicle-mounted controller. The vehicle-mounted controller controls the high-voltage power distribution unit to supply power to the motor of the electric excavator, so that the motor runs, and thus the electric excavator starts to work. In order to continuously supply power to the high-voltage power distribution unit, while starting the motor, the vehicle-mounted controller sends a charging instruction to the battery energy distribution unit on the power bank or the energy storage battery. The battery energy distribution unit transmits the power of the battery on the power bank or the energy storage battery to the high-voltage power distribution unit through a discharge cable, so that the high-voltage power distribution unit supplies power to the motor of the electric excavator. A battery management device is also arranged on the power bank, and the battery management device can monitor the state of the battery, obtain parameters such as the battery power, etc.

[0070] It can be Figure 1 seen that when the extended discharge cable is more than 10 meters during the operation of the electric excavator, it will cause the communication signal between the battery management device and the vehicle-mounted controller to be easily transmitted unsuccessfully, that is, the vehicle-mounted controller cannot receive the communication signal sent by the battery management device arranged on the power bank or the energy storage battery. Specifically, too long a transmission distance between the vehicle-mounted controller and the battery management device may cause signal attenuation, and the signal strength will gradually weaken, thereby affecting the transmission quality and stability of the signal. And there are many electronic devices and electrical systems inside the electric excavator, such as motors, power supplies, etc., which will generate electromagnetic interference and affect the communication signal transmission between the battery management device and the vehicle-mounted controller, thereby affecting the quality of the communication signal.

[0071] To solve the above signal interruption problem, the utility model uses a coupling circuit set on a power bank or an energy storage battery to process the first CAN signal transmitted by the battery management device on the power bank or the energy storage battery through parsing, modulation, and amplification, and then transmits it to the discharge cable through circuit coupling. The discharge cable sends the coupled signal to a demodulator set on the cab, engine room, or electric control cabin of the electric excavator. The demodulator adjusts the coupled signal to obtain a second CAN signal, and the demodulator sends the second CAN signal to a vehicle-mounted controller set on the cab, engine room, or electric control cabin of the electric excavator, so that the vehicle-mounted controller can receive the communication signal sent by the battery management device. After receiving the second CAN signal, the vehicle-mounted controller needs to parse the second CAN signal to understand the information it contains, such as battery status, current, voltage, etc., and display parameters such as battery status, current, and voltage on the display screen in the cab. For example, the vehicle-mounted controller obtains parameters such as the voltage, current, and power of the battery in the power bank or the energy storage battery according to the second CAN signal, and then calculates parameters such as the battery charge and discharge status, battery health status, and available energy according to the voltage, current, and power of the battery. The vehicle-mounted controller displays the calculated battery charge and discharge status, battery health status, available energy, and other parameters on the display screen in the cab of the electric excavator. If the vehicle-mounted controller parses a fault in the power bank according to the second CAN signal, then the vehicle-mounted controller generates a shutdown command and sends it to the high-voltage power distribution unit through the discharge cable, so that the high-voltage power distribution unit stops supplying power to the motor of the electric excavator. For example, the battery management device collects the temperature of the battery and sends the temperature of the battery to the vehicle-mounted controller. The vehicle-mounted controller determines that the temperature of the battery is too high. If the power bank continues to be used to supply power to the electric excavator, a safety accident may occur. The vehicle-mounted controller generates a shutdown command and sends it to the high-voltage power distribution unit through the discharge cable, so that the high-voltage power distribution unit stops supplying power to the motor of the electric excavator.

[0072] Generally, different communication protocols or signal level standards are used between the vehicle-mounted controller and the battery management device. The coupling circuit can play a role in signal adaptation, converting and matching the signals between the two parties to ensure normal communication between them. In the electric excavator system, due to the excessive transmission distance of the signals between the vehicle-mounted controller and the battery management device, resulting in signal attenuation, and the electromagnetic interference generated by the electronic devices and electrical systems inside the electric excavator affecting the communication signal transmission between the battery management device and the vehicle-mounted controller, the coupling circuit can filter and suppress the signals, reducing the impact of interference on the communication quality. The coupling circuit can improve the signal transmission quality and reduce communication problems caused by factors such as signal attenuation and distortion. Moreover, when the coupling signal generated by the coupling circuit is transmitted in the discharge cable, it will not be lost or distorted due to the electromagnetic interference in the discharge cable, thereby improving the communication efficiency and reliability between the vehicle-mounted controller and the battery management device.

[0073] Furthermore, transmitting the coupling signal through the discharge cable can reduce the possible external interference during signal transmission, such as electromagnetic interference and signal attenuation, thus ensuring the stability and reliability of signal transmission. Transmitting the coupling signal through the discharge cable can improve the reliability of data transmission. In an electric excavator, the battery management device is crucial for the safety and performance of the entire electric excavator. Using the discharge cable to transmit the coupling signal can reduce the possibility of interference and data loss, ensuring that information is accurately conveyed to the vehicle-mounted controller.

[0074] In the battery management device of the present utility model, the communication with the vehicle-mounted controller also adopts the PLC carrier communication method to convert the first CAN signal into the first carrier signal. Specifically, the first CAN transceiver on the power bank or energy storage battery forwards the first CAN signal sent by the battery management device to the first converter on the power bank or energy storage battery. Then the first CAN transceiver forwards the first CAN signal to the first converter, and the first converter converts the first CAN signal into the first CANTX signal (the first CAN transmission signal), and then sends the first CAN transmission signal to the first communication chip on the power bank or energy storage battery. The first communication chip converts the first CAN transmission signal into the first carrier signal, that is, the first CAN transmission signal is sequentially analyzed, processed, and modulated to form the first carrier signal. Then the first carrier signal is amplified by the first power amplifier on the power bank or energy storage battery, and the amplified signal is coupled through the coupling circuit on the power bank or energy storage battery, and the coupled signal is transmitted to the discharge cable.

[0075] When the battery management device sends the coupled signal to the discharge cable, the discharge cable sends the coupled signal to the demodulator on the cab or engine room or electric control cabin of the electric excavator. The demodulator on the cab or engine room or electric control cabin of the electric excavator demodulates the coupled signal to generate a second carrier signal. The second carrier signal is amplified by the second power amplifier on the cab or engine room or electric control cabin of the electric excavator, and then the second carrier signal is converted into a second CAN signal through the second communication chip on the cab or engine room or electric control cabin of the electric excavator. The second CAN signal is converted into a first CANRX signal (first CAN receive signal) through the second converter on the cab or engine room or electric control cabin of the electric excavator. The first CAN receive signal is sent to the vehicle-mounted controller through the second CAN transceiver.

[0076] When the vehicle-mounted controller sends a communication signal to the battery management device, the vehicle-mounted controller, the coupling circuit, the power amplifier, and the high-voltage distribution unit are arranged on the cab or engine room or electric control cabin of the electric excavator, and the battery management device, the demodulator, and the battery energy distribution unit are arranged on the power bank or energy storage battery. The vehicle-mounted controller can forward the third CAN signal sent by the vehicle-mounted controller to the third converter on the cab or engine room or electric control cabin of the electric excavator through the third CAN transceiver on the cab or engine room or electric control cabin of the electric excavator. The third converter converts the third CAN signal into a second CAN TX signal (second CAN transmission signal), and then sends the second CAN transmission signal to the third communication chip on the cab or engine room or electric control cabin of the electric excavator. The third communication chip converts the second CAN transmission signal into a third carrier signal, that is, the second CAN transmission signal is sequentially subjected to parsing processing and modulation processing to form a third carrier signal. Then, the third carrier signal is amplified by the third power amplifier on the cab or engine room or electric control cabin of the electric excavator, and the amplified signal is coupled and transmitted to the discharge cable. When the vehicle-mounted controller sends the coupled signal to the discharge cable, the discharge cable sends the coupled signal to the demodulator on the power bank or energy storage battery. The demodulator demodulates the coupled signal to generate a fourth carrier signal. The fourth carrier signal is amplified by the fourth power amplifier on the power bank or energy storage battery, and then the fourth carrier signal is converted into a fourth CAN signal through the fourth communication chip on the power bank or energy storage battery. The fourth CAN signal is converted into a second CAN RX signal (second CAN reception signal) through the fourth converter on the power bank or energy storage battery. The second CAN reception signal is sent to the battery management device through the fourth CAN transceiver on the power bank or energy storage battery. The above-mentioned power amplifier can be a PA chip, which usually refers to a Power Amplifier Chip, an integrated circuit chip used to enhance signal power. The above-mentioned CAN transceiver can adopt NXP TJA1040, the above-mentioned converter can adopt STM32F103, and the above-mentioned communication chip can adopt QCA7005 / 7000.

[0077] The remote interaction system provided by the present utility model includes: a battery management device, a power amplifier, a coupling circuit, a discharge cable, a demodulator, and a vehicle-mounted controller. The battery management device transmits a first CAN signal, and the power amplifier amplifies the modulated first CAN signal. Here, the modulated first CAN signal is a signal formed by the first CAN signal sequentially passing through parsing processing and modulation processing. The coupling circuit couples the amplified signal. Here, the battery management device, the power amplifier, and the coupling circuit are arranged on a power bank or an energy storage battery. The discharge cable is electrically connected to the coupling circuit, and the discharge cable receives the coupled signal. The demodulator is communicatively connected to the discharge cable, and the demodulator demodulates the coupled signal to obtain a second CAN signal. The vehicle-mounted controller is communicatively connected to the demodulator, and the vehicle-mounted controller receives the second CAN signal. Here, the demodulator and the vehicle-mounted controller are arranged in the cab or engine room or electric control cabin of the electric excavator. By processing the CAN signal emitted by the battery management device through the power amplifier and the coupling circuit, and sending the processed signal to the discharge cable, it is possible to prevent signal loss or distortion from occurring during the signal transmission of the discharge cable. The discharge cable then sends this signal to the vehicle-mounted controller, thereby completing the communication between the battery management device and the vehicle-mounted controller, so that the vehicle-mounted controller can receive a relatively high-quality or complete communication signal sent by the battery management device. In addition, since different communication protocols or signal level standards are usually used between the vehicle-mounted controller and the battery management device, the coupling circuit can play a role in signal adaptation, converting and matching the signals between the two parties to ensure normal communication between the two parties.

[0078] Figure 3 is a circuit schematic diagram of the coupling circuit provided by an exemplary embodiment of the present utility model. As Figure 3 shown, the coupling circuit may include: a first circuit 11, a second circuit 12, a third circuit 13, and an analog matching resistor. The first input terminal of the first circuit 11 is electrically connected to the first DC bus A, the first output terminal of the first circuit 11 is electrically connected to the second DC bus B, the second circuit 12 is connected in series with the first circuit 11, the output terminal of the second circuit 12 is electrically connected to the input terminal of the power amplifier, the third circuit 13 is connected in series with the first circuit 11, the third circuit 13 is connected in parallel with the second circuit 12, and the input terminal of the analog matching resistor is connected to the output terminal of the third circuit 13.

[0079] Specifically, the first input terminal of the first circuit 11 is electrically connected to the first DC bus A, the first output terminal of the first circuit 11 is electrically connected to the second DC bus B, the first input terminal of the second circuit 12 is electrically connected to the second output terminal of the first circuit 11, the first output terminal of the second circuit 12 is electrically connected to the second input terminal of the first circuit 11, the second output terminal of the second circuit 12 is electrically connected to the input terminal of the power amplifier, the second input terminal of the second circuit 12 is electrically connected to the output terminal of the power amplifier, the first input terminal of the third circuit 13 is electrically connected to the second output terminal of the first circuit 11, the first output terminal of the third circuit 13 is electrically connected to the second input terminal of the first circuit 11, the input terminal of the analog matching resistor is electrically connected to the second output terminal of the third circuit 13, and the output terminal of the analog matching resistor is electrically connected to the second input terminal of the third circuit 13.

[0080] In the embodiment of the present utility model, in order to ensure the transmission quality and accuracy of signals, it is necessary to match the signal resistances between different circuits or components to be consistent. The analog matching resistor can be used to adjust the impedance of the circuit so that the signal matching reaches the best state.

[0081] Figure 4 is a circuit schematic diagram of the first circuit provided by an exemplary embodiment of the present utility model. As Figure 4 shown, the first circuit 11 may include: a first capacitor C1, a second capacitor C2, and a first resistor R1. The input terminal of the first capacitor C1 is electrically connected to the first DC bus A, the output terminal of the second capacitor C2 is electrically connected to the second DC bus B, the input terminal of the first resistor R1 is electrically connected to the output terminal of the first capacitor C1, and the output terminal of the first resistor R1 is electrically connected to the input terminal of the second capacitor C2.

[0082] Figure 5 is a circuit schematic diagram of the second circuit provided by an exemplary embodiment of the present utility model. As Figure 5 shown, the second circuit 12 may include: a first series circuit 121, a second series circuit 122, and a third series circuit 123. The first series circuit 121 is connected in series with the first capacitor C1, the output terminal of the first series circuit 121 is electrically connected to the input terminal of the power amplifier, the second series circuit 122 is connected in series with the second capacitor C2, the input terminal of the second series circuit 122 is electrically connected to the output terminal of the power amplifier, and the third series circuit 123 is respectively connected in series with the first series circuit 121 and the second series circuit 122.

[0083] Specifically, the input end of the first series circuit 121 is electrically connected to the output end of the first capacitor C1, the output end of the first series circuit 121 is electrically connected to the input end of the power amplifier, the output end of the power amplifier is electrically connected to the input end of the second series circuit 122, the output end of the second series circuit 122 is electrically connected to the input end of the second capacitor C2, the input end of the third series circuit 123 is electrically connected to the output end of the first series circuit 121, and the output end of the third series circuit 123 is electrically connected to the input end of the second series circuit 122. As Figure 3 , Figure 5 shown, the first series circuit 121 may include: a third capacitor C3 and a second resistor R2. The third capacitor C3 is connected in series with the first capacitor C1, the second resistor R2 is connected in series with the third capacitor C3, and the output end of the second resistor R2 is electrically connected to the input end of the power amplifier.

[0084] Specifically, the input end of the third capacitor C3 is electrically connected to the output end of the first capacitor C1, the output end of the third capacitor C3 is electrically connected to the input end of the second resistor R2, and the output end of the second resistor R2 is electrically connected to the input end of the power amplifier.

[0085] As Figure 3 , Figure 5 shown, a fourth capacitor C4 and a third resistor R3. The fourth capacitor C4 is connected in series with the second capacitor C2, the third resistor R3 is connected in series with the fourth capacitor C4, and the input end of the third resistor R3 is electrically connected to the output end of the power amplifier.

[0086] Specifically, the output end of the fourth capacitor C4 is electrically connected to the input end of the second capacitor C2, the output end of the third resistor R3 is electrically connected to the input end of the fourth capacitor C4, and the input end of the third resistor R3 is electrically connected to the output end of the power amplifier.

[0087] As Figure 5 shown, the third series circuit 123 may include: a fourth resistor R4, a fifth capacitor C5, a fifth resistor R5, and a sixth resistor R6. The fourth resistor R4 is connected in series with the third resistor R3, the fifth capacitor C5 is connected in series with the fourth resistor R4, the fifth resistor R5 is connected in series with the fifth capacitor C5, and the sixth resistor R6 is respectively connected in series with the fifth resistor R5 and the second resistor R2.

[0088] Specifically, the output end of the fourth resistor R4 is electrically connected to the input end of the third resistor R3, the output end of the fifth capacitor C5 is electrically connected to the input end of the fourth resistor R4, the output end of the fifth resistor R5 is electrically connected to the input end of the fifth capacitor C5, the output end of the sixth resistor R6 is electrically connected to the input end of the fifth resistor R5, and the input end of the sixth resistor R6 is electrically connected to the output end of the second resistor R2.

[0089] Figure 6 is a schematic circuit diagram of the third circuit provided by an exemplary embodiment of the present invention. As Figure 6 shown, the third circuit 13 may include: a fourth series circuit 131, a fifth series circuit 132, and a sixth series circuit 133. The fourth series circuit 131 is connected in series with the first circuit 11, the fifth series circuit 132 is connected in series with the fourth series circuit 131, and the sixth series circuit 133 is respectively connected in series with the fourth series circuit 131 and the analog matching resistor.

[0090] Specifically, the first input end of the fourth series circuit 131 is electrically connected to the second output end of the first circuit 11, the first output end of the fourth series circuit 131 is electrically connected to the second input end of the first circuit 11, the first input end of the fifth series circuit 132 is electrically connected to the second output end of the fourth series circuit 131, the first output end of the fifth series circuit 132 is electrically connected to the second input end of the fourth series circuit 131, the first input end of the sixth series circuit 133 is electrically connected to the second output end of the fifth series circuit 132, the first output end of the sixth series circuit 133 is electrically connected to the second input end of the fifth series circuit 132, the second output end of the sixth series circuit 133 is electrically connected to the input end of the analog matching resistor, and the second input end of the sixth series circuit 133 is electrically connected to the output end of the analog matching resistor.

[0091] As Figure 3 、 Figure 6 shown, the fourth series circuit 131 may include: a seventh resistor R7, a sixth capacitor C6, an eighth resistor R8, a seventh capacitor C7, and a first inductor L1. The seventh resistor R7 is connected in series with the first circuit 11, the sixth capacitor C6 is connected in series with the seventh resistor R7, the eighth resistor R8 is connected in series with the first circuit 11, the seventh capacitor C7 is connected in series with the eighth resistor R8, and the first inductor L1 is respectively connected in series with the sixth capacitor C6 and the seventh capacitor C7.

[0092] Specifically, the input end of the seventh resistor R7 is electrically connected to the second output end of the first circuit 11, the input end of the sixth capacitor C6 is electrically connected to the output end of the seventh resistor R7, the output end of the eighth resistor R8 is electrically connected to the second input end of the first circuit 11, the output end of the seventh capacitor C7 is electrically connected to the input end of the eighth resistor R8, the input end of the first inductor L1 is electrically connected to the output end of the sixth capacitor C6, and the output end of the first inductor L1 is electrically connected to the input end of the seventh capacitor C7.

[0093] As Figure 3 , Figure 6 shown, the fifth series circuit 132 may include: an eighth capacitor C8, a ninth capacitor C9, and a tenth capacitor C10. The eighth capacitor C8 is connected in series with the sixth capacitor C6, the ninth capacitor C9 is connected in series with the eighth capacitor C8, and the tenth capacitor C10 is respectively connected in series with the ninth capacitor C9 and the seventh capacitor C7.

[0094] Specifically, the output end of the eighth capacitor C8 is electrically connected to the first input end of the sixth series circuit 133, the input end of the ninth capacitor C9 is electrically connected to the output end of the eighth capacitor C8, the output end of the tenth capacitor C10 is electrically connected to the input end of the seventh capacitor C7, and the input end of the tenth capacitor C10 is electrically connected to the output end of the ninth capacitor C9.

[0095] In one embodiment, as Figure 3 , Figure 6 shown, the sixth series circuit 133 may include: a second inductor L2, a third inductor L3, and an eleventh capacitor C11. The second inductor is respectively connected in series with the eighth capacitor C8 and the analog matching resistor. The tenth capacitor C10 is connected in series with the second inductor L2. The third inductor L3 is respectively connected in series with the tenth capacitor C10 and the analog matching resistor.

[0096] Specifically, the input end of the second inductor L2 is electrically connected to the output end of the eighth capacitor C8, the output end of the second inductor L2 is electrically connected to the input end of the analog matching resistor, the output end of the third inductor L3 is electrically connected to the input end of the tenth capacitor C10, the input end of the third inductor L3 is electrically connected to the output end of the analog matching resistor, the input end of the eleventh capacitor C11 is electrically connected to the output end of the second inductor L2, and the output end of the eleventh capacitor C11 is electrically connected to the input end of the third inductor L3.

[0097] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub - combinations thereof.

Claims

1. A remote interactive system, characterized in that: include: A battery management device, wherein the battery management device transmits a first CAN signal; A power amplifier, wherein the power amplifier amplifies the modulated first CAN signal; wherein the modulated first CAN signal is a signal formed after the first CAN signal is successively subjected to analysis processing and modulation processing; A coupling circuit, wherein the coupling circuit couples the amplified signal; wherein the battery management device, the power amplifier and the coupling circuit are arranged on a power bank or an energy storage battery; a discharge cable, the discharge cable being electrically connected to the coupling circuit, and the discharge cable receiving the coupled signal; A demodulator, the demodulator is communicatively connected to the discharge cable, and the demodulator demodulates the coupled signal to obtain a second CAN signal; A vehicle-mounted controller is communicatively connected with the demodulator, and the vehicle-mounted controller receives the second CAN signal; wherein the demodulator and the vehicle-mounted controller are arranged in a cab, a cabin or an electric control cabin of the electric excavator.

2. The remote interactive system according to claim 1, characterized in that: The coupling circuit comprises: A first circuit (11), wherein a first input end of the first circuit (11) is electrically connected to a first DC bus, and a first output end of the first circuit (11) is electrically connected to a second DC bus; a second circuit (12), the second circuit (12) being connected in series with the first circuit (11), the output end of the second circuit (12) being electrically connected to the input end of the power amplifier; a third circuit (13), the third circuit (13) being connected in series with the first circuit (11), and the third circuit (13) being connected in parallel with the second circuit (12); and An analog matching resistor, wherein the input end of the analog matching resistor is connected to the output end of the third circuit (13).

3. The remote interactive system according to claim 2, characterized in that: The first circuit (11) comprises: A first capacitor, wherein an input end of the first capacitor is electrically connected to the first DC bus; a second capacitor, wherein an output end of the second capacitor is electrically connected to the second DC bus; A first resistor, wherein an input end of the first resistor is electrically connected to an output end of the first capacitor, and an output end of the first resistor is electrically connected to an input end of the second capacitor.

4. The remote interactive system according to claim 3, characterized in that: The second circuit (12) comprises: A first series circuit (121), the first series circuit (121) being connected in series with the first capacitor, and an output end of the first series circuit (121) being electrically connected to an input end of the power amplifier; A second series circuit (122), the second series circuit (122) being connected in series with the second capacitor, and an input end of the second series circuit (122) being electrically connected to an output end of the power amplifier; A third series circuit (123), wherein the third series circuit (123) is connected in series with the first series circuit (121) and the second series circuit (122) respectively.

5. The remote interactive system according to claim 4, characterized in that: The first series circuit (121) comprises: a third capacitor, the third capacitor being connected in series with the first capacitor; and A second resistor, wherein the second resistor is connected in series with the third capacitor, and an output end of the second resistor is electrically connected to an input end of the power amplifier.

6. The remote interactive system according to claim 5, characterized in that: The second series circuit (122) comprises: a fourth capacitor, the fourth capacitor being connected in series with the second capacitor; and A third resistor is connected in series with the fourth capacitor, and an input end of the third resistor is electrically connected to an output end of the power amplifier.

7. The remote interactive system according to claim 6, characterized in that: The third series circuit (123) comprises: a fourth resistor, the fourth resistor being connected in series with the third resistor; a fifth capacitor, the fifth capacitor being connected in series with the fourth resistor; a fifth resistor, the fifth resistor being connected in series with the fifth capacitor; A sixth resistor is connected in series with the fifth resistor and the second resistor respectively.

8. The remote interactive system according to claim 2, characterized in that: The third circuit (13) comprises: a fourth series circuit (131), the fourth series circuit (131) being connected in series with the first circuit (11); a fifth series circuit (132), the fifth series circuit (132) being connected in series with the fourth series circuit (131); A sixth series circuit (133), wherein the sixth series circuit (133) is connected in series with the fourth series circuit (131) and the analog matching resistor respectively.

9. The remote interactive system according to claim 8, characterized in that: The fourth series circuit (131) comprises: a seventh resistor, the seventh resistor and the first circuit (11) are connected in series; a sixth capacitor, the sixth capacitor being connected in series with the seventh resistor; an eighth resistor, the eighth resistor being connected in series with the first circuit (11); a seventh capacitor, wherein the seventh capacitor is connected in series with the eighth resistor; A first inductor is connected in series with the sixth capacitor and the seventh capacitor respectively.

10. The remote interactive system according to claim 9, characterized in that: The fifth series circuit (132) comprises: an eighth capacitor, the eighth capacitor being connected in series with the sixth capacitor; a ninth capacitor, the ninth capacitor being connected in series with the eighth capacitor; A tenth capacitor, wherein the tenth capacitor is connected in series with the ninth capacitor and the seventh capacitor respectively.

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