Semitrailer battery energy transmission system and method based on electric traction vehicle

Abstract

The invention discloses a semitrailer battery energy transmission system and method based on an electric traction vehicle, belongs to the technical field of battery energy transmission, and aims to solve the problems that in the prior art, energy supply for a semitrailer is inconvenient, the actual transportation effect of the semitrailer is affected, and the transportation cost is increased. The system comprises an electric tractor and a semitrailer, the electric tractor is provided with an optical coupler, the electric tractor is provided with a traction seat and a first battery, the optical coupler is electrically connected with a control device, an ECU control unit and a vehicle end interface, the ECU control unit is electrically connected with a display, and the control device is provided with a plurality of control assemblies; the second battery is charged through the first battery, so that energy supply for the semitrailer is facilitated, the problem of insufficient energy of the semitrailer can be effectively solved, the transportation problem caused by insufficient energy of the semitrailer in the driving process is avoided, the logistics transportation efficiency is improved, and the logistics cost is reduced.

Description

Technical Field

[0001] The present invention relates to a battery energy transmission system and method for a semi-trailer based on an electric towing vehicle, belonging to the technical field of battery energy transmission. Background Art

[0002] In fields such as logistics transportation, the combination of electric towing vehicles and semi-trailers is a common transportation mode. However, currently, the energy supply between electric towing vehicles and semi-trailers is relatively independent of each other, which causes many inconveniences. Take a semi-trailer refrigerated truck as an example. During transportation, the refrigeration equipment requires continuous and stable energy supply. Once the semi-trailer runs out of energy, due to the inconvenience of energy replenishment, it is quite difficult to solve the problem. This will not only affect the preservation of goods, but may even cause the entire batch of goods to deteriorate and be damaged. In such scenarios with special requirements for energy sustainability, the existing energy supply mode obviously cannot meet the transportation requirements. With the continuous increase in the electrification penetration rate of towing vehicles and the continuous rise in the requirements for greening and intelligentization in the transportation industry, the demand for a convenient and efficient energy replenishment method between electric towing vehicles and semi-trailers is becoming increasingly urgent.

[0003] The existing energy supply between electric towing vehicles and semi-trailers is relatively independent. When the semi-trailer runs out of energy, it is not convenient to replenish its energy, which affects the actual transportation effect of the semi-trailer, thereby increasing the transportation cost and affecting the safety during logistics transportation. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a battery energy transmission system and method for a semi-trailer based on an electric towing vehicle, so as to solve the problems that the existing energy supply between electric towing vehicles and semi-trailers is relatively independent, when the semi-trailer runs out of energy, it is not convenient to replenish its energy, which affects the actual transportation effect of the semi-trailer, thereby increasing the transportation cost and affecting the safety during logistics transportation.

[0005] To solve the above technical problems, the present invention is implemented by adopting the following technical solutions: In the first aspect, the present invention provides a battery energy transmission system for a semi-trailer based on an electric towing vehicle, including an electric towing vehicle and a semi-trailer. An optical coupler is provided on the electric towing vehicle. A towing seat and a first battery are provided on the electric towing vehicle. The optical coupler is electrically connected to a control device, an ECU control unit, and a vehicle end interface. The vehicle end interface is arranged on the towing seat. The ECU control unit is electrically connected to a display. A plurality of control components are provided on the control device; The semi-trailer is provided with a charging overprotection chip, a second battery and a drawbar. The first battery and the second battery are both electrically connected to the charging overprotection chip. The charging overprotection chip is electrically connected to the optocoupler through the vehicle end interface. The first battery is electrically connected to the second battery through the vehicle end interface. The drawbar is detachably connected to the fifth wheel.

[0006] Further, the vehicle end interface includes a first vehicle end CAN bus interface and a first vehicle end energy transmission interface. The first battery is electrically connected to the second battery through the first vehicle end CAN bus interface. The first battery is electrically connected to the second battery through the first vehicle end energy transmission interface.

[0007] Further, the optocoupler is electrically connected to the control device, the ECU control unit and the vehicle end interface through the CAN bus. The vehicle end interface is electrically connected to the charging overprotection chip through the CAN bus. The display is electrically connected to the ECU control unit through the CAN bus. The first battery and the second battery are both electrically connected to the charging overprotection chip through the CAN bus.

[0008] Further, the semi-trailer is provided with a second vehicle end CAN bus interface for connecting to the first vehicle end CAN bus interface, and the semi-trailer is provided with a second vehicle end energy transmission interface for connecting to the first vehicle end energy transmission interface.

[0009] In a second aspect, the present invention provides a method for semi-trailer battery energy transmission based on an electric traction vehicle. Based on the semi-trailer battery energy transmission system according to the first aspect, the control component includes a system start toggle switch. The method includes the following steps: The operator issues an instruction to the ECU control unit through the system start toggle switch. The ECU control unit performs a self-check and completes the start / stop system operation according to the self-check result, specifically including: If the operator toggles the system start toggle switch to the on position, the control device controls the display to turn on through the ECU control unit; The ECU control unit transmits the self-check signal to the optocoupler, and the optocoupler transmits the self-check signal to the charging overprotection chip; The charging overprotection chip collects the SOC information of the first battery and the second battery; The charging overprotection chip transmits the SOC information to the optocoupler, and the optocoupler transmits the SOC information to the ECU control unit; The ECU control unit processes and judges the SOC information and transmits the information to the display. If the judgment result is normal, the system is started and the automatic emergency stop operation is performed. If the judgment result is abnormal, the system is not started. If the operator toggles the system start toggle switch to the off position, the ECU control unit shuts down the system.

[0010] Furthermore, the automatic emergency stop operation specifically includes: The charging overprotection chip acquires the status information of the first battery and the second battery and judges whether the status information is abnormal. If the status information is abnormal, the charging overprotection chip transmits the status information to the ECU control unit and transmits an instruction to the optocoupler. The ECU control unit obtains an emergency stop signal according to the status information and transmits the emergency stop signal to the display. The optocoupler controls the vehicle-end interface to disconnect according to the instruction, shuts down the system, and the display alarms to complete the automatic emergency stop operation. If the status information is normal, the automatic emergency stop operation ends.

[0011] Furthermore, the control component further includes an automatic charging program toggle switch, and the method further includes: The operator issues an instruction to the ECU control unit through the automatic charging program toggle switch to complete the operation of starting / closing the automatic charging program, which specifically includes: If the operator toggles the automatic charging program toggle switch to the on position, the ECU control unit starts the automatic charging program, and the control device transmits the instruction to the ECU control unit. The ECU control unit transmits the instruction to the optocoupler, and the optocoupler transmits the instruction to the charging overprotection chip. The charging overprotection chip collects the SOC information of the first battery and the second battery. The charging overprotection chip transmits the SOC information to the optocoupler, and the optocoupler transmits the SOC information to the ECU control unit. The ECU control unit judges the SOC information according to preset conditions and obtains a control instruction for the energy transmission loop according to the judgment result. The ECU control unit transmits the instruction to the optocoupler, and the optocoupler controls the vehicle-end interface to close or disconnect according to the instruction. The charging overprotection chip collects the energy transmission loop information and the information on the energy transmission from the first battery to the second battery, and transmits the two pieces of information to the optocoupler. The optocoupler transmits the two pieces of information to the ECU control unit, and the ECU control unit processes the two pieces of information and transmits the processed two pieces of information to the display. If the operator toggles the automatic charging program toggle switch to the off position, the ECU control unit turns off the automatic charging program.

[0012] Further, the preset conditions specifically include: If the SOC of the first battery 8 is not greater than 20%, the control instruction for the energy transfer circuit is to disconnect; If the SOC of the first battery 8 is greater than 20% and the SOC of the second battery 4 is less than 50%, the control instruction for the energy transfer circuit is to close; If the SOC of the first battery 8 is greater than 20% and the SOC of the second battery 4 is not less than 50% and less than 80%, the control instruction for the energy transfer circuit is to disconnect; If the SOC of the first battery 8 is greater than 20% and the SOC of the second battery 4 is not less than 80%, the control instruction for the energy transfer circuit is to disconnect.

[0013] Further, the control component further includes a charging program toggle switch, and the method further includes: The operator issues an instruction to the ECU control unit through the charging program toggle switch to complete the operation of starting / stopping the charging program, specifically including: If the operator toggles the charging program toggle switch to the on or off position, the ECU control unit starts the charging program, and the control device transmits the instruction to the ECU control unit; The ECU control unit transmits the instruction to the optocoupler, and the optocoupler controls the vehicle-side interface to close or open according to the instruction; wherein, when the charging program toggle switch is in the on position, the optocoupler controls the vehicle-side interface to close according to the instruction, and if the charging program toggle switch is in the off position, the optocoupler controls the vehicle-side interface to open according to the instruction; The charging overprotection chip collects the information of the energy transfer circuit and the information of the energy transfer from the first battery to the second battery, and transmits the two pieces of information to the optocoupler; The optocoupler transmits the two pieces of information to the ECU control unit, and the ECU control unit processes the two pieces of information and transmits the processed two pieces of information to the display. Further, the control component further includes an emergency stop button, and the method further includes: The operator issues an instruction to the ECU control unit through the emergency stop button to complete the operation of shutting down the system, specifically including: The operator presses the emergency stop button; The control device transmits the instruction to the ECU control unit; The ECU control unit transmits the instruction to the optocoupler and the display; The optocoupler controls the vehicle-side interface to disconnect according to the instruction, shuts down the system, and the display alarms to complete the emergency stop work.

[0014] Beneficial effects achieved by the present invention compared with the prior art: 1. The semi-trailer battery energy transmission system based on an electric traction vehicle adopts a charging overprotection chip, further enhancing the safety and reliability during the charging process. The present invention charges the second battery with the first battery to facilitate energy supply for the semi-trailer, effectively solving the problem of insufficient energy of the semi-trailer, avoiding transportation problems caused by insufficient energy of the semi-trailer during driving, improving the logistics transportation efficiency, reducing the logistics cost, and increasing the economic benefits. 2. The semi-trailer battery energy transmission method based on an electric traction vehicle effectively extends the service life and safety of the battery, constructs an intelligent charging system, realizes efficient collaborative charging between the first battery and the second battery, ensures the efficiency and safety of the charging process, and does not affect the normal operation of the vehicle at the same time. This is an intelligent upgrade of the traditional vehicle charging technology, filling the blank in the relevant technical field. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view structural schematic diagram of a semi-trailer battery energy transmission system based on an electric traction vehicle provided by an embodiment of the present invention; Figure 2 is a front view structural schematic diagram of a vehicle-end interface provided by an embodiment of the present invention; Figure 3 is a flow schematic diagram of a system start toggle switch provided by an embodiment of the present invention; Figure 4 is a flow schematic diagram of an automatic emergency stop operation provided by an embodiment of the present invention; Figure 5 is a flow schematic diagram of an emergency stop button provided by an embodiment of the present invention; Figure 6 is a system structural schematic diagram of a control device provided by an embodiment of the present invention.

[0016] In the figure: 1. Control device; 2. Towing seat; 3. Charging overprotection chip; 4. Second battery; 5. Towing pin; 6. Vehicle-end interface; 7. ECU control unit; 8. First battery; 9. Optocoupler; 10. Display; 11. Second vehicle-end CAN bus interface; 12. Second vehicle-end energy transmission interface; 13. Electric tractor; 14. Semi-trailer; 15. First vehicle-end CAN bus interface; 16. First vehicle-end energy transmission interface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and should not be used to limit the protection scope of the present invention.

[0018] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0019] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances. Embodiment 1:

[0020] As Figure 1 - Figure 2 shown, the present invention provides a semi-trailer battery energy transmission system based on an electric towing vehicle, including an electric tractor 13 and a semi-trailer 14. A photocoupler 9 is provided on the electric tractor 13. A towing seat 2 and a first battery 8 are provided on the electric tractor 13. The photocoupler 9 is electrically connected to a control device 1, an ECU control unit 7, and a vehicle-end interface 6. The vehicle-end interface 6 is arranged on the towing seat 2. The ECU control unit 7 is electrically connected to a display 10. A plurality of control components are provided on the control device 1; A charging overprotection chip 3, a second battery 4, and a towing pin 5 are provided on the semi-trailer 14. Both the first battery 8 and the second battery 4 are electrically connected to the charging overprotection chip 3. The charging overprotection chip 3 is electrically connected to the photocoupler 9 through the vehicle-end interface 6. The first battery 8 is electrically connected to the second battery 4 through the vehicle-end interface 6. The towing pin 5 is detachably connected to the towing seat 2.

[0021] Specifically, the charging overprotection chip 3 can detect the SOC information of the first battery 8 and the second battery 4 through the CAN bus. At the same time, it can also detect the CAN bus connection status between the electric tractor 13 and the semi-trailer 14 and the connection status of the energy transmission circuit between the electric tractor 13 and the semi-trailer 14. And it can process the collected information and transmit it to the optocoupler 9 through the CAN bus. The optocoupler 9 can transmit the information to the ECU control unit 7 through the CAN bus. Optionally, both the first battery 8 and the second battery 4 are power batteries. The ECU control unit 7 is the electronic control unit of the vehicle.

[0022] In the present invention, the ECU control unit 7 can receive the signals of the control device 1 and the charging overprotection chip 3 through the CAN bus, and can process the information and issue instructions to the optocoupler 9 through the CAN bus. The second battery 4 is the energy storage device of the semi-trailer 14, and provides electrical energy for the components in the semi-trailer 14 during daily use. The first battery 8 is the energy storage device of the electric tractor 13, providing energy for the daily use of the electric tractor 13. In the present invention, it can also transmit energy to the second battery 4 through the energy transmission circuit. The optocoupler 9 is an electro-optical-electrical conversion device that transmits electrical signals through light. The device of the present invention can separate the vehicle CAN bus from the energy transmission circuit, and can close / open the energy transmission circuit integrated in the vehicle end interface 6 by executing instructions. The display 10 is a display device that can receive the information of the ECU control unit 7. In the present invention, the operator can obtain the operation information of the energy transmission system on the display 10, such as the self-check state, the on / off state of the energy transmission system, the emergency stop alarm state, and the SOC information of the first battery 8 and the second battery 4. Among them, the CAN bus is the Controller Area Network bus CAN, which is abbreviated as the CAN bus in the present invention. It enables the components connected to the CAN bus in the system to transmit information and issue instructions through the CAN bus to ensure the operation of the system. Among them, the ECU control unit 7 is the Electronic Control Unit in the vehicle, which is abbreviated as the ECU control unit 7 in the present invention. It can perform operation calculations on the information transmitted to the ECU control unit 7 through the CAN bus, and the ECU control unit 7 issues instructions to ensure the operation of the system. Among them, SOC is the state of charge, which is the ratio of the available power in the battery to the nominal capacity, abbreviated as SOC in the present invention.

[0023] Such as Figure 2As shown in the figure, in one embodiment, the vehicle-end interface 6 includes a first vehicle-end CAN bus interface 15 and a first vehicle-end energy transmission interface 16. The first battery 8 is electrically connected to the second battery 4 through the first vehicle-end CAN bus interface 15, and the first battery 8 is electrically connected to the second battery 4 through the first vehicle-end energy transmission interface 16. A second vehicle-end CAN bus interface 11 for connecting to the first vehicle-end CAN bus interface 15 is provided on the semi-trailer 14, and a second vehicle-end energy transmission interface 12 connected to the first vehicle-end energy transmission interface 16 is provided on the semi-trailer 14.

[0024] Specifically, the vehicle-end interface 6 is provided under the fifth-wheel 2, and there are two interfaces. One is the first vehicle-end CAN bus interface 15, which ensures that the charging overprotection chip 3 and the ECU control unit 7 can transmit information through the CAN bus; the other is the first vehicle-end energy transmission interface 16, which ensures the energy transmission from the first battery 8 to the second battery 4. The first vehicle-end CAN bus interface 15 is connected to the second vehicle-end CAN bus interface 11, thereby connecting the CAN buses of the electric tractor 13 and the semi-trailer 14 to realize the communication function between the electric tractor 13 and the semi-trailer 14. The first vehicle-end energy transmission interface 16 is connected to the second vehicle-end energy transmission interface 12, thereby connecting the energy transmission loop between the electric tractor 13 and the semi-trailer 14 to realize the energy transmission function from the first battery 8 to the second battery 4. Optionally, the CAN bus interface of the first battery 8 is electrically connected to the CAN bus interface of the second battery 4 through the first vehicle-end CAN bus interface 15.

[0025] In one embodiment, the optocoupler 9 is electrically connected to the control device 1, the ECU control unit 7, and the vehicle-end interface 6 through the CAN bus. The vehicle-end interface 6 is electrically connected to the charging overprotection chip 3 through the CAN bus. The display 10 is electrically connected to the ECU control unit 7 through the CAN bus. Both the first battery 8 and the second battery 4 are electrically connected to the charging overprotection chip 3 through the CAN bus.

[0026] Compared with the prior art, the charging method provided by the present invention has a simple structure. Innovatively, the CAN bus at the electric tractor end is separated from the power supply circuits of the first battery 8 and the second battery 4 through optoelectronic isolation. At the same time, by detecting the state of the vehicle battery by the system and then turning on the subsequent power supply circuit, the problem of insufficient battery energy of the semi-trailer 14 is solved, thereby improving the logistics efficiency and effectively reducing the logistics cost. In addition, in the present invention, a charging overprotection chip 3 is also innovatively adopted, further enhancing the safety and reliability during the charging process. The present invention facilitates the energy supply to the semi-trailer 14, can effectively solve the problem of insufficient energy of the semi-trailer 14, avoid transportation problems caused by insufficient energy of the semi-trailer 14 during driving, improve the logistics transportation efficiency, reduce the logistics cost, and increase the economic benefits. Embodiment 2:

[0027] As Figure 3 and Figure 6 shown, the present invention provides a method for transmitting battery energy of a semi-trailer based on an electric traction vehicle. Based on the system for transmitting battery energy of a semi-trailer based on an electric traction vehicle described in Embodiment 1, the control component includes a system start toggle switch, and the method includes the following steps: An operator issues an instruction to the ECU control unit 7 through the system start toggle switch. The ECU control unit 7 performs self-checking and completes the operation of starting / closing the system (i.e., the system for transmitting battery energy of a semi-trailer based on an electric traction vehicle in Embodiment 1) according to the self-checking result. Specifically, it includes: If the operator toggles the system start toggle switch to the on position, the control device 1 controls the display 10 to turn on through the ECU control unit 7; The ECU control unit 7 transmits the self-checking signal to the optocoupler 9, and the optocoupler 9 transmits the self-checking signal to the charging overprotection chip 3; The charging overprotection chip 3 collects the SOC information of the first battery 8 and the second battery 4; The charging overprotection chip 3 transmits the SOC information to the optocoupler 9, and the optocoupler 9 transmits the SOC information to the ECU control unit 7; The ECU control unit 7 processes and judges the SOC information and transmits the information to the display 10. If the judgment result is normal, the system is started and the automatic emergency stop operation is performed. If the judgment result is abnormal, the system is not started and an alarm is given; If the operator toggles the system start toggle switch to the off position, the ECU control unit 7 shuts down the system.

[0028] Specifically, after the operator connects the electric tractor 13 to the semi-trailer 14; the operator turns the system start toggle switch on the control device 1 to the ON position (i.e., the open position), indicating that the start system command is issued. The control device 1 transmits information to the ECU control unit 7 through the CAN bus. The ECU control unit transmits information to the display 10 through the CAN bus, and the display 10 is turned on; The self-check program starts: The ECU control unit 7 transmits the self-check signal to the optocoupler 9 through the CAN bus; the optocoupler 9 transmits the self-check signal to the overcharge protection chip 3 through the CAN bus; The overcharge protection chip 3 collects the SOC information of the first battery 8, the SOC information of the second battery 4, and the loop connection information through the CAN bus; The overcharge protection chip 3 transmits the information to the ECU control unit 7 through the CAN bus. At the same time, the overcharge protection chip 3 starts the self-check program to detect whether the states of the first battery 8 and the second battery 4 are abnormal; The ECU control unit 7 processes the signal, determines whether the signal is normal, and transmits the signal to the display 10 through the CAN bus; among them, if the judgment result is normal, the system is started and the automatic emergency stop operation is performed. If the judgment result is abnormal, the system is not started and an alarm is given; the self-check program ends.

[0029] The display 10 displays the SOC information of the first battery 8, the SOC information of the second battery 4, the energy transmission loop connection status, and the CAN bus loop connection status collected by the overcharge protection chip 3; when the SOC of the first battery 8, the SOC information of the second battery 4, the energy transmission loop connection status, and the CAN bus loop connection status are abnormal, an alarm signal is displayed; when the SOC of the first battery 8, the SOC information of the second battery 4, the energy transmission loop connection status, and the CAN bus loop connection status are normal, there is no alarm signal; The system without an alarm signal indicates that the SOC of the first battery 8, the SOC information of the second battery 4, the energy transmission loop connection status, and the CAN bus loop connection status are normal and the connection is correct; If an alarm signal is displayed, it means that there is a problem with the energy transmission loop, the CAN bus loop, the first battery 8, or the second battery 4. The operator can re-check the connection of the energy transmission loop and the CAN bus loop or check whether there is a problem with the first battery 8 or the second battery 4 to ensure the normal operation of the system, Figure 6 It is a schematic diagram of the system structure of the control device 1.

[0030] As Figure 4 shown, in an embodiment, the specific automatic emergency stop operation includes: The overcharge protection chip 3 obtains the status information of the first battery 8 and the second battery 4, and determines whether the status information is abnormal; If the status information is abnormal, the overcharge protection chip 3 transmits the status information to the ECU control unit 7 and transmits an instruction to the optocoupler 9; The ECU control unit 7 obtains an emergency stop signal according to the status information, and transmits the emergency stop signal to the display 10. The optocoupler 9 controls the vehicle end interface 6 to disconnect according to the instruction, shuts down the system, and the display 10 gives an alarm to complete the automatic emergency stop operation; If the status information is normal, the automatic emergency stop operation ends.

[0031] Specifically, the overcharge protection chip 3 detects that the status or energy transmission loop of the first battery 8 and the second battery 4 is abnormal; The overcharge protection chip 3 processes the information and transmits an instruction to the optocoupler 9 through the CAN bus and transmits the abnormal information of the energy transmission loop to the ECU control unit 7; The optocoupler 9 transmits the instruction to the energy transmission loop connection in the vehicle end interface 6 through the CAN bus. The ECU control unit 7 receives the emergency stop signal and transmits the signal to the display 10 through the CAN bus; The energy transmission loop connection part of the vehicle end interface 6 disconnects the energy transmission loop, and the display 10 displays the emergency stop signal and gives an alarm; The display 10 gives an alarm, and the emergency stop automatically starts the process to end; In an embodiment, the control component further includes an automatic charging program toggle switch, and the method further includes: The operator issues an instruction to the ECU control unit 7 through the automatic charging program toggle switch to complete the operation of starting / closing the automatic charging program, specifically including: If the operator toggles the automatic charging program toggle switch to the on position, the ECU control unit 7 starts the automatic charging program, and the control device 1 transmits an instruction to the ECU control unit 7; The ECU control unit 7 transmits the instruction to the optocoupler 9, and the optocoupler 9 transmits the instruction to the overcharge protection chip 3; The overcharge protection chip 3 collects the SOC information of the first battery 8 and the second battery 4; The overcharge protection chip 3 transmits the SOC information to the optocoupler 9, and the optocoupler 9 transmits the SOC information to the ECU control unit 7; The ECU control unit 7 judges the SOC information according to preset conditions, and obtains a control instruction for the energy transmission loop according to the judgment result; The ECU control unit 7 transmits the instruction to the optocoupler 9, and the optocoupler 9 controls the vehicle end interface 6 to close or disconnect according to the instruction; The overcharge protection chip 3 collects information on the energy transfer circuit and information on the energy transfer from the first battery 8 to the second battery 4, and transmits the two pieces of information to the optocoupler 9; The optocoupler 9 transmits the two pieces of information to the ECU control unit 7. The ECU control unit 7 processes the two pieces of information and transmits the processed two pieces of information to the display 10; If the operator toggles the automatic charging program toggle switch to the off position, the ECU control unit 7 turns off the automatic charging program.

[0032] The preset conditions specifically include: If the SOC of the first battery 8 is not greater than 20%, the control instruction for the energy transfer circuit is to disconnect; If the SOC of the first battery 8 is greater than 20% and the SOC of the second battery 4 is less than 50%, the control instruction for the energy transfer circuit is to close; If the SOC of the first battery 8 is greater than 20% and the SOC of the second battery 4 is not less than 50% and less than 80%, the control instruction for the energy transfer circuit is to disconnect; If the SOC of the first battery 8 is greater than 20% and the SOC of the second battery 4 is not less than 80%, the control instruction for the energy transfer circuit is to disconnect.

[0033] Specifically, the operator can toggle the automatic charging toggle switch on the control device 1 to select to turn on / off the automatic charging program: when the automatic charging toggle switch is toggled to the display showing ON (i.e., turned on), the automatic charging program is turned on: The control device 1 transmits the instruction to the ECU control unit 7 through the CAN bus; The ECU control unit 7 processes the information and transmits the instruction to the optocoupler 9 through the CAN bus; The optocoupler 9 transmits the information to the overcharge protection chip 3 through the CAN bus; The overcharge protection chip 3 collects the SOC information of the first battery 8 and the SOC information of the second battery 4; After the overcharge protection chip 3 has collected the information, it transmits the information to the optocoupler 9 through the CAN bus; The optocoupler 9 transmits the information to the ECU control unit 7 through the CAN bus; The ECU control unit 7 processes the information and determines whether to close the energy transfer circuit; The judgment condition is: When the SOC of the first battery 8 is less than 20%, the energy transfer circuit is automatically disconnected to ensure the normal operation of the electric tractor 13; When the SOC of the first battery 8 is greater than 20% and the SOC of the second battery 4 is less than 50%, the energy transfer circuit is automatically closed to prevent problems caused by insufficient energy in the first battery 8; When the SOC of the first battery 8 is greater than 20% and the SOC of the second battery 4 is not less than 50% and less than 80%, the energy transfer circuit is automatically disconnected. At this time, the operator can manually close the energy transfer circuit; When the SOC of the first battery 8 is greater than 20% and the SOC of the second battery 4 is not less than 80%, the energy transfer circuit is automatically disconnected, and the operator cannot manually close the energy transfer circuit; In an embodiment, when the ECU control unit 7 determines that the condition for closing the energy transfer circuit is met: The ECU control unit 7 transmits the information of closing the energy transfer circuit to the optocoupler 9 through the CAN bus; The optocoupler 9 executes the instruction and transmits the information to the vehicle interface 6 through the CAN bus; The energy transfer circuit connection part of the vehicle interface 6 closes the circuit; The first battery 8 is transmitted to the second battery 4 through the energy transfer circuit; The charging overprotection chip 3 collects the information that the energy transfer circuit is closed and the information that the first battery 8 transfers energy to the second battery 4; The charging overprotection chip 3 transmits the information to the optocoupler 9 through the CAN bus, and the optocoupler 9 transmits the information to the ECU control unit 7 through the CAN bus; The ECU control unit 7 processes the information, and the ECU control unit 7 transmits the processed information to the display 10 through the CAN bus; The operator can obtain the state that the energy transfer system transfers energy normally through the display 10.

[0034] In an embodiment, if the ECU control unit 7 determines that the condition is insufficient: The ECU control unit 7 transmits the information of insufficient condition to the display 10 through the CAN bus; The operator can obtain the information through the display 10 to judge the reasons that cause the condition to be insufficient and the energy circuit cannot be automatically closed; Optionally, when the operator selects to turn off the automatic charging and toggles the automatic charging button to display the word OFF (i.e., off), the automatic charging program is turned off.

[0035] In an embodiment, the control component further includes a charging program toggle switch, and the method further includes: The operator issues an instruction to the ECU control unit 7 through the charging program toggle switch to complete the operation of starting / closing the charging program, specifically including.

[0036] If the operator toggles the charging program toggle switch to the on or off position, the ECU control unit 7 starts the charging program, and the control device 1 transmits the instruction to the ECU control unit 7; The ECU control unit 7 transmits the instruction to the optocoupler 9, and the optocoupler 9 controls the vehicle end interface 6 to close or open according to the instruction; wherein, when the charging program toggle switch is in the on position, the optocoupler 9 controls the vehicle end interface 6 to close according to the instruction, and if the charging program toggle switch is in the off position, the optocoupler 9 controls the vehicle end interface 6 to open; The charging overprotection chip 3 collects the energy transmission loop information and the information on the energy transmission from the first battery 8 to the second battery 4, and transmits the two pieces of information to the optocoupler 9; The optocoupler 9 transmits the two pieces of information to the ECU control unit 7, and the ECU control unit 7 processes the two pieces of information and transmits the processed two pieces of information to the display 10.

[0037] Specifically, the operator can select to turn on or off the charging program at the charging program toggle switch of the control device 1; The control device 1 transmits information to the ECU control unit 7 through the CAN bus, and processes the information and transmits a signal to the optocoupler 9 through the CAN bus; The optocoupler 9 receives the signal through the CAN bus and transmits a signal for closing or opening the energy transmission loop to the vehicle end interface 6 through the CAN bus; The energy transmission loop connection part in the vehicle end interface 6 performs an operation to close or open the energy transmission loop; The charging overprotection chip 3 collects the information on the closing or opening of the energy transmission loop and the information on the energy transmission from the first battery 8 to the second battery 4; The charging overprotection chip 3 transmits the information to the optocoupler 9 through the CAN bus; The optocoupler 9 transmits the information to the ECU control unit 7 through the CAN bus; The ECU control unit 7 processes the information and transmits the processed information to the display 10 through the CAN bus; The operator extracts the information on whether the energy transmission loop is open or closed through the display 10.

[0038] As Figure 5 shown, in an embodiment, the control component further includes an emergency stop button, and the method further includes: The operator issues an instruction to the ECU control unit 7 through the emergency stop button to complete the operation of shutting down the system, specifically including: The operator presses the emergency stop button; The control device 1 transmits the instruction to the ECU control unit 7; The ECU control unit 7 transmits instructions to the optocoupler 9 and the display 10; The optocoupler 9 controls the disconnection of the vehicle-end interface 6 according to the instruction, shuts down the system, and the display 10 gives an alarm to complete the emergency stop operation.

[0039] Specifically, the schematic diagram of the manual start emergency stop procedure of the present invention: The operator presses the emergency stop button; The ECU control unit 7 transmits instructions to the optocoupler 9 and the display 10; The optocoupler 9 transmits the instruction to the energy transmission loop connection part in the vehicle-end interface 6 through the CAN bus, and the display 10 receives the emergency stop signal; The energy transmission loop connection part of the vehicle-end interface 6 disconnects the energy transmission loop, and the display 10 shows the emergency stop signal and gives an alarm; The display 10 gives an alarm, and the manual emergency stop process ends.

[0040] As Figure 6 It can be seen that the control device 1 of the present invention includes a system start toggle switch, an automatic charging program toggle switch, a charging program toggle switch, and an emergency stop button; System start toggle switch: The operator can toggle the switch to issue an instruction to the ECU control unit 7 through the CAN bus, so as to complete the operation of starting / turning off the system; Automatic charging program toggle switch: The operator can toggle the switch to issue an instruction to the ECU control unit 7 through the CAN bus, so as to complete the operation of starting / turning off the automatic charging program; Charging program toggle switch: The operator can toggle the switch to issue an instruction to the ECU control unit 7 through the CAN bus, so as to complete the operation of starting / turning off the charging program; Emergency stop button: When an unexpected situation occurs, the operator can press the emergency stop button, and the control device issues an instruction to the ECU control unit through the CAN bus to urgently shut down the system; In addition to the functions expressed by the above toggle switches and buttons, the control device 1 is default with a self-check program: When the operator operates the control device 1 and toggles the system start toggle switch to system start, the self-check program starts; The control device 1 transmits the self-check signal to the ECU control unit 7 through the CAN bus of the electric tractor; When the system start toggle switch is toggled to the on or off state: The control device 1 transmits a signal to the ECU control unit 7 through the CAN bus; The ECU control unit 7 processes the signal and transmits the system start / stop signal to the optocoupler 9 through the CAN bus; When the automatic charging program toggle switch is toggled to the on or off state: The control device 1 transmits signals to the ECU control unit 7 via the CAN bus; The ECU control unit 7 processes the signals and transmits the signal for starting / stopping the automatic charging program to the optocoupler 9 via the CAN bus.

[0041] When the charging program toggle switch is toggled to the on or off state: The control device 1 transmits to the ECU control unit 7 via the CAN bus; The ECU control unit 7 processes the signals and transmits the signal for starting / stopping the charging program to the optocoupler 9 via the CAN bus.

[0042] When the emergency stop button is pressed: The control device 1 transmits the emergency stop signal to the ECU control unit 7 via the CAN bus; The ECU control unit 7 processes the signals and transmits the signals to the optocoupler 9 via the CAN bus.

[0043] The present invention effectively extends the service life and safety of the battery, constructs an intelligent charging system, realizes efficient collaborative charging between the power battery of the electric tractor (i.e., the first battery 8) and the battery of the semi-trailer (i.e., the second battery 4), ensures the efficiency and safety of the charging process, and does not affect the normal operation of the vehicle at the same time. This is an intelligent upgrade of the traditional vehicle charging technology and fills the gap in the relevant technical field.

[0044] The present invention effectively avoids the interference of electrical problems during charging to the vehicle-end CAN bus of the electric tractor, ensures the stable operation of the vehicle control system, solves the problem that electrical interference in the traditional charging method affects the key communication lines of the vehicle, and improves the overall safety and reliability of the vehicle; the application of the present invention in the tractor-trailer can effectively solve the problem of insufficient energy of the semi-trailer 14, avoid transportation problems caused by insufficient energy of the semi-trailer 14 during driving, improve the logistics transportation efficiency, reduce the logistics cost, and increase the economic benefits.

[0045] The control device 1 of the present invention communicates with the ECU control unit 7 via the CAN bus, and the latter realizes the charging-related functions by controlling the optocoupler 9; when starting the automatic charging program, after the ECU control unit 7 confirms the completion of the CAN bus connection, it transmits an electrical signal to the optocoupler 9 to connect the power supply circuits of the two vehicle batteries, and the first battery 8 supplies power to the second battery 4. The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A semi-trailer battery energy transmission system based on an electric traction vehicle, characterized in that: The electric tractor and the semi-trailer are provided with an optical coupler, the electric tractor is provided with a traction seat and a first battery, the optical coupler is electrically connected with a control device, an ECU control unit and a vehicle-end interface, the vehicle-end interface is arranged on the traction seat, the ECU control unit is electrically connected with a display, and the control device is provided with a plurality of control components; The semi-trailer is provided with an overcharge protection chip, a second battery and a towing pin, the first battery and the second battery are both electrically connected to the overcharge protection chip, the overcharge protection chip is electrically connected to the optical coupler through the vehicle-end interface, the first battery is electrically connected to the second battery through the vehicle-end interface, and the towing pin is detachably connected to the towing seat.

2. The semi-trailer battery energy transmission system based on an electric traction vehicle according to claim 1, characterized in that: The vehicle-end interface includes a first vehicle-end CAN bus interface and a first vehicle-end energy transmission interface. The first battery is electrically connected to the second battery via the first vehicle-end CAN bus interface, and the first battery is electrically connected to the second battery via the first vehicle-end energy transmission interface.

3. The semi-trailer battery energy transmission system based on an electric traction vehicle according to claim 1, characterized in that: The optocoupler is electrically connected to the control device, the ECU control unit, and the vehicle-end interface through the CAN bus. The vehicle-end interface is electrically connected to the over-charge protection chip through the CAN bus. The display is electrically connected to the ECU control unit through the CAN bus. The first battery and the second battery are both electrically connected to the over-charge protection chip through the CAN bus.

4. The semi-trailer battery energy transmission system based on an electric traction vehicle according to claim 2, characterized in that: The semi-trailer is provided with a second vehicle-end CAN bus interface for connecting to the first vehicle-end CAN bus interface, and the semi-trailer is provided with a second vehicle-end energy transmission interface connected to the first vehicle-end energy transmission interface.

5. A method for transmitting battery energy of a semitrailer based on an electric traction vehicle, based on the battery energy transmission system of a semitrailer based on an electric traction vehicle according to any one of claims 1 to 4, characterized in that: The control assembly includes a system start toggle switch, and the method includes the following steps: The operator issues a command to the ECU control unit through the system start toggle switch. The ECU control unit performs a self-check and completes the start / shutdown system operation based on the self-check results, including: If the operator turns the system start toggle switch to the on position, the control device controls the display to turn on through the ECU control unit; The ECU control unit transmits the self-test signal to the optical coupler, and the optical coupler transmits the self-test signal to the over-charge protection chip; The overcharge protection chip collects SOC information of the first battery and the second battery; The overcharge protection chip transmits the SOC information to the optical coupler, and the optical coupler transmits the SOC information to the ECU control unit; The ECU control unit processes and judges the SOC information and transmits the information to the display. If the judgment result is normal, the system is started and the automatic emergency stop is performed. If the judgment result is abnormal, the system is not started; If the operator turns the system start toggle switch to the off position, the ECU control unit shuts down the system.

6. The method for transmitting battery energy of a semitrailer based on an electric traction vehicle according to claim 5, characterized in that: The automatic emergency stop operation specifically includes: The overcharge protection chip obtains status information of the first battery and the second battery, and determines whether the status information is abnormal; If the status information is abnormal, the overcharge protection chip transmits the status information to the ECU control unit and transmits instructions to the optical coupler; The ECU control unit obtains the emergency stop signal according to the status information and transmits the emergency stop signal to the display. The optical coupler controls the vehicle-side interface to disconnect according to the command, shuts down the system, and the display alarms, completing the automatic emergency stop work; If the status information is normal, the automatic emergency stop operation ends.

7. The method for transmitting battery energy of a semitrailer based on an electric traction vehicle according to claim 5, characterized in that: The control assembly further includes an automatic charging program toggle switch, and the method further includes: The operator issues instructions to the ECU control unit through the automatic charging program toggle switch to complete the operation of starting / stopping the automatic charging program, including: If the operator turns the automatic charging program toggle switch to the on position, the ECU control unit starts the automatic charging program, and the control device transmits the command to the ECU control unit; The ECU control unit transmits the command to the optical coupler, and the optical coupler transmits the command to the overcharge protection chip; The overcharge protection chip collects SOC information of the first battery and the second battery; The overcharge protection chip transmits the SOC information to the optical coupler, and the optical coupler transmits the SOC information to the ECU control unit; The ECU control unit judges the SOC information according to the preset conditions and obtains the control instructions of the energy transmission circuit according to the judgment results; The ECU control unit transmits the command to the optical coupler, and the optical coupler controls the vehicle-side interface to close or open according to the command; The overcharge protection chip collects information of the energy transmission circuit and information of energy transmission from the first battery to the second battery, and transmits the two pieces of information to the optical coupler; The optical coupler transmits the two information to the ECU control unit, and the ECU control unit processes the two information and transmits the processed two information to the display; If the operator turns the automatic charging program switch to the off position, the ECU control unit turns off the automatic charging program.

8. The method for transmitting battery energy of a semitrailer based on an electric traction vehicle according to claim 7, characterized in that: The preset conditions specifically include: If the SOC of the first battery 8 is not greater than 20%, the control instruction of the energy transmission circuit is disconnected; If the SOC of the first battery 8 is greater than 20% and the SOC of the second battery 4 is less than 50%, the control instruction of the energy transmission circuit is closed; If the SOC of the first battery 8 is greater than 20%, and the SOC of the second battery 4 is not less than 50% and less than 80%, the control instruction of the energy transmission circuit is disconnected; If the SOC of the first battery 8 is greater than 20% and the SOC of the second battery 4 is not less than 80%, the control instruction of the energy transmission circuit is disconnected.

9. The method for transmitting battery energy of a semitrailer based on an electric traction vehicle according to claim 5, characterized in that: The control assembly further includes a charging program toggle switch, and the method further includes: The operator issues instructions to the ECU control unit through the charging program toggle switch to complete the start / stop charging program operation, including: If the operator turns the charging program toggle switch to the on or off position, the ECU control unit starts the charging program, and the control device transmits the command to the ECU control unit; The ECU control unit transmits the command to the optical coupler, and the optical coupler controls the vehicle-side interface to be closed or disconnected according to the command; when the charging program toggle switch is in the on position, the optical coupler controls the vehicle-side interface to be closed according to the command, and if the charging program toggle switch is in the off position, the optical coupler controls the vehicle-side interface to be disconnected according to the command; The overcharge protection chip collects information of the energy transmission circuit and information of energy transmission from the first battery to the second battery, and transmits the two pieces of information to the optical coupler; The optical coupler transmits the two pieces of information to the ECU control unit, and the ECU control unit processes the two pieces of information and transmits the processed two pieces of information to the display.

10. The method for transmitting battery energy of a semitrailer based on an electric traction vehicle according to claim 5, characterized in that: The control assembly further includes an emergency stop button, and the method further includes: The operator issues a command to the ECU control unit through the emergency stop button to complete the system shutdown operation, including: The operator presses the emergency stop button; The control device transmits the command to the ECU control unit; The ECU control unit transmits the command to the optocoupler and the display; The optocoupler controls the vehicle-side interface to disconnect according to the command, shuts down the system, and the display alarms, completing the emergency stop work.

Images