Battery replacement heavy truck rear side image signal transmission control system and control method

Abstract

The present application belongs to the technical field of image signal transmission of battery swap heavy truck, and particularly relates to a control system and control method for rear side image signal transmission of battery swap heavy truck. The control system comprises a vehicle end controller and a thermal management system, the thermal management system is connected with a relay A and a conversion relay, the conversion relay is connected with a battery management system and a camera, the camera is connected with a relay B in series through the conversion relay and is connected with the vehicle end controller in signal at the same time through the relay B, the vehicle end controller is connected with a relay C and is connected with a vehicle end low-voltage power supply through the relay C. The present application enables the thermal management system to have the function of rear side image signal transmission of battery swap heavy truck, solves the problem that the battery cabinet cannot be used for battery swap heavy truck due to different battery swap interfaces, simplifies the technology and reduces the cost, makes it applicable to battery swap heavy truck, ensures the quality of image presentation, and has a promotion effect.

Description

Technical Field

[0001] This invention belongs to the technical field of image signal transmission for battery-swapping heavy trucks, specifically relating to a control system and method for transmitting rear image signals for battery-swapping heavy trucks. Background Technology

[0002] To address the carbon emissions pollution problem of heavy-duty trucks, new energy heavy-duty trucks are being used to replace gasoline-powered heavy-duty trucks. Previously, gasoline-powered heavy-duty trucks had a window on the rear side of the cab, allowing the driver to observe the rear of the vehicle through the rearview mirror. However, new energy heavy-duty trucks have battery cabinets installed at the rear, completely obstructing the view and making it impossible to observe the rear of the vehicle. To address the issue of battery cabinets obstructing the rear view of vehicles, two solutions exist: one is to lower the height of the battery cabinet, which, while allowing the rear view to be visible, also reduces the battery capacity, thus affecting the driving range of new energy heavy-duty trucks; the other is to add a camera to the battery cabinet, which transmits images of the rear of the vehicle to the cab. However, due to the limited battery capacity of new energy heavy-duty trucks, the battery cabinet needs to be replaced regularly to meet the driving range requirements. These new energy heavy-duty trucks that require timely battery cabinet replacement are called battery-swapping heavy-duty trucks. Since the battery swapping interfaces of battery-swapping heavy-duty trucks vary, adding a camera to the battery cabinet is not universally applicable. Even if a new image interface were added to the battery-swapping heavy-duty truck to achieve universality, expensive automotive cables would also be required, increasing costs.

[0003] Existing technologies include research on transmitting and recording vehicle image signals, such as patent applications CN110782548A (a dashcam for electric vehicles) and CN103971425A (a dashcam with front and rear view functions). These technologies record the front and rear sides of the vehicle by installing cameras at both ends, solving the problem of recording and saving this information. However, existing vehicle image signal transmission methods are only suitable for small and medium-sized passenger vehicles and not for new energy heavy-duty trucks, especially battery-swapping trucks. Furthermore, existing vehicle image signal transmission technologies are costly and difficult to implement in battery-swapping trucks. Therefore, a new technical solution is needed to address these technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a control system and method for transmitting rear image signals of battery-swapping heavy trucks, in order to solve the problems mentioned in the background art that the current vehicle image signal transmission is only applicable to small and medium-sized passenger cars and not to new energy heavy trucks, especially battery-swapping heavy trucks. Furthermore, the existing vehicle image signal transmission technology is costly and extremely difficult to promote in battery-swapping heavy trucks.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a transmission and control system for rear-side image signals of a battery-swapping heavy truck, comprising a vehicle-end controller and a thermal management system connected to the vehicle-end controller via signals. The thermal management system is controlled by a relay A and a switching relay. The switching relay is connected to a battery management system and a camera via a switching relay. The camera is connected in series with a relay B via the switching relay and is simultaneously connected to the vehicle-end controller via relay B. The vehicle-end controller is controlled by a relay C and is connected to a vehicle-end low-voltage power supply via relay C. The vehicle-end low-voltage power supply is connected in series with the battery management system via relay C and the switching relay. The battery management system is connected in series with the thermal management system via relay A.

[0006] Furthermore, an image control line is connected between relay B and the switching relay. Control buses are connected between the switching relay and relay A, and between relay A and the battery management system. The control bus is connected to the image control line via the thermal management system. The image control line passes through the cab of the battery-swapping heavy-duty truck and extends into the battery cabinet. The control bus is located inside the battery cabinet. The vehicle-side controller and the vehicle-side low-voltage power supply are both installed in the cab of the battery-swapping heavy-duty truck. The camera extends from inside the battery cabinet to the outside of the battery cabinet. The thermal management system and the battery management system are both installed inside the battery cabinet. The battery cabinet is located at the rear of the cab. The thermal management system and the vehicle-side controller are connected via a CAN bus located between the cab and the battery cabinet.

[0007] Furthermore, the thermal management system has its own DC-DC converter and is connected to relay A via the DC-DC converter for control. Relay A is a dual-channel normally open relay I, which includes a normally open switch I and a controller I. The controller I is connected to the thermal management system and is connected to the normally open switch I via the thermal management system for control. One end of the normally open switch I is connected to the DC-DC converter, and the other end of the normally open switch I is connected to the battery management system and the conversion relay via the controller I. The battery management system is connected in series with the DC-DC converter via the normally open switch I.

[0008] Furthermore, the switching relay is a dual-channel switching relay, which includes a switching switch and a controller II. The controller II is connected to the thermal management system and is controlled by the switching switch through the thermal management system. One end of the switching switch is connected in series with relays B and C, and the other end of the switching switch is connected to a camera or a battery management system. The camera is connected in series with relay B through the switching switch and is signal-connected to the vehicle-side controller through relay B.

[0009] Furthermore, the relay B is a dual-channel normally open relay II, which includes a normally open switch II and a controller III. The controller III is connected to the vehicle-side controller and is controlled by the normally open switch II through the vehicle-side controller. One end of the normally open switch II is connected to the vehicle-side controller, and the other end of the normally open switch II is connected in series with the relay C and simultaneously connected to the camera through the controller II and the changeover switch.

[0010] Furthermore, the relay C is a dual-channel normally closed relay, which includes a normally closed switch and a controller IV. The controller IV is connected to the vehicle-end controller and is controlled by the normally closed switch through the vehicle-end controller. One end of the normally closed switch is connected to the vehicle-end low-voltage power supply, and the other end of the normally closed switch is connected in series with the normally open switch II and the changeover switch.

[0011] The above-designed image signal transmission control system for battery-swapping heavy-duty trucks is used to acquire images of the rear side of the truck. The specific control method is as follows: First, the vehicle-side controller transmits the image acquisition command to the thermal management system via the CAN bus. Upon receiving the image acquisition command, the thermal management system controls controller I to connect normally open switch I to the DC-DC converter. Second, while transmitting the image acquisition command, the vehicle-side controller controls controller IV to disconnect the normally closed switch from the vehicle-side low-voltage power supply. At this time, the control bus is taken over by the DC-DC converter, and the corresponding image control line from the cab to the battery cabinet is disconnected. Third, while the DC-DC converter takes over the control bus, the thermal management system controls controller II to switch the transfer switch to the camera position. Finally, the vehicle-side controller controls controller III to connect normally open switch II to the camera via the image control line and the transfer switch. At this time, the image control line guides the camera to input its image signal to the vehicle-side controller for display, thus acquiring the image of the rear side of the battery-swapping heavy-duty truck.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This invention utilizes a unified low-voltage power line for the battery swapping interface to transmit image signals, enabling the thermal management system to transmit image signals from the rear of battery swapping heavy-duty trucks. This solves the problem that adding a camera to the battery cabinet is not compatible with battery swapping heavy-duty trucks due to different battery swapping interfaces. Through the switching action of the conversion relay, the vehicle-side controller can not only control the battery management system but also receive and display the image signals transmitted by the camera, effectively improving the practicality of the transmission control system. This makes the transmission control system fully applicable to new energy heavy-duty trucks, especially battery swapping heavy-duty trucks. Furthermore, by using the connection settings between relays A, B, and C, the vehicle-side controller, vehicle-side low-voltage power supply, thermal management system, and camera or battery management system are interconnected and mutually influential, achieving a tightly linked system. This effectively reduces the technical cost of image signal transmission, ensuring that the camera's image signals can be reliably accessed by the vehicle-side controller and displayed without distortion. This effectively improves the reliability and stability of image signal transmission, guarantees the quality of the image presentation from the rear of the battery swapping heavy-duty truck, and has a promotional effect.

[0014] 2. This invention uses a cross-connection between the control bus and the image control line, enabling the cab and the battery cabinet to influence and switch between each other, thereby achieving the goal of the cab and the battery cabinet complementing each other and effectively improving the reliability of image signal transmission. By having a built-in DC-DC converter on the thermal management system, the battery-swapping heavy truck can not only use the low-voltage power supply at the vehicle end to provide power to the thermal management system and the battery management system when replacing the battery cabinet, but also use the DC-DC converter to convert the high voltage of the battery in the battery cabinet into low-voltage DC power to supply the battery management system. This effectively increases the power supply of the battery-swapping heavy truck during image signal transmission and ensures the driving range of the battery-swapping heavy truck.

[0015] 3. This invention utilizes the normally open and normally closed switches of relays B and C to enable the vehicle-side controller, under the switching of the relays, to not only control the battery management system but also receive and display image signals transmitted from the camera. This effectively enhances the practicality of the transmission control system, making the image signal transmission control system fully applicable to new energy heavy-duty trucks, especially battery-swapping trucks. Furthermore, by utilizing the switching settings of the relays, the vehicle-side controller and the camera achieve the purpose of image signal transmission, effectively reducing the technical cost of image signal transmission. This ensures that the camera's image signal can be reliably accessed by the vehicle-side controller and displayed without distortion, effectively improving the reliability and stability of image signal transmission, guaranteeing the quality of the rear image presentation of the battery-swapping truck, and possessing promotional potential. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the circuit control structure of Embodiment 1 of the present invention in the power supply state;

[0017] Figure 2 This is a schematic diagram of the circuit control structure in the image signal transmission state according to Embodiment 1 of the present invention;

[0018] Figure 3 This is a schematic diagram of the circuit control structure of Comparative Example 1 of the present invention.

[0019] The components include: 1. Vehicle-side controller; 2. Thermal management system; 3. Relay A; 301. Dual-channel normally open relay I; 3011. Normally open switch I; 3012. Controller I; 4. Transfer relay; 401. Dual-channel transfer relay; 4011. Transfer switch; 4012. Controller II; 5. Battery management system; 6. Camera; 7. Relay B; 701. Dual-channel normally open relay II; 7011. Normally open switch II; 7012. Controller III; 8. Relay C; 801. Dual-channel normally closed relay; 8011. Normally closed switch; 8012. Controller IV; 9. Vehicle-side low-voltage power supply; 10. Image control line; 11. Control bus; 12. Driver's cab; 13. Battery cabinet; 14. CAN bus; 15. DC-DC converter; 16. Signal demodulator; 17. Signal modulator. Detailed Implementation

[0020] The following examples are used to further illustrate the content of the present invention and do not limit the application of the present invention.

[0021] Example 1: (Taking the low-voltage control line as an example)

[0022] Please see Figures 1-2 A control system for transmitting rear-side image signals of a battery-swapping heavy-duty truck includes a vehicle-end controller 1 for transmitting commands and receiving image signals, and a thermal management system 2 connected to the vehicle-end controller 1 for transmitting rear-side image signals of the battery-swapping heavy-duty truck. The thermal management system 2 is controlled by a relay A3 for controlling the power supply of a DC-DC converter to a battery management system 5, and a conversion relay 4 for switching between power supply and image signal transmission. The conversion relay 4 is connected to the battery management system 5 for managing the batteries in the battery cabinet, and a camera 6 for acquiring information about the rear of the vehicle. The camera 6 is connected in series with a relay B7 via the conversion relay 4 for controlling the camera 6 to receive image signals from the vehicle-end controller 1, and is also connected to the vehicle-end controller 1 via the relay B7. The vehicle-end controller 1 is controlled by a relay C8 for controlling the power supply of a vehicle-end low-voltage power supply 9, and is also connected to the vehicle-end low-voltage power supply 9 via the relay C8. The vehicle-end low-voltage power supply 9 is connected in series with the battery management system 5 via the relay C8 and the conversion relay 4. The battery management system 5 is connected in series with the thermal management system 2 via the relay A3.

[0023] Please see Figures 1-2 A control line 10 for controlling image signal transmission is connected between relay B7 and conversion relay 4. A control bus 11 for controlling power supply is connected between conversion relay 4 and relay A3, and between relay A3 and battery management system 5. The control bus 11 is connected to the image control line 10 through thermal management system 2. The image control line 10 passes through the cab 12 of the battery swapping heavy truck and extends into the battery cabinet 13 of the battery swapping heavy truck. The control bus 11 is located in the battery cabinet 13 of the battery swapping heavy truck. The vehicle-side controller 1 and the vehicle-side low-voltage power supply 9 are both installed in the cab 12 of the battery swapping heavy truck. The camera 6 extends from inside the battery cabinet 13 of the battery swapping heavy truck to the outside of the battery cabinet 13 of the battery swapping heavy truck. The thermal management system 2 and the battery management system 5 are both installed in the battery cabinet 13 of the battery swapping heavy truck. The battery cabinet 13 is located at the rear of the cab 12. The thermal management system 2 and the vehicle-side controller 1 are connected by a CAN (Controller Area Network) bus 14 located between the cab 12 and the battery cabinet 13.

[0024] The thermal management system 2 has a built-in DC-DC converter 15 for high and low voltage conversion and is connected to the relay A3 for control via the DC-DC converter 15;

[0025] Relay A3 is a dual-channel normally open relay I301. The dual-channel normally open relay I301 includes a normally open switch I3011 and a controller I3012. The controller I3012 is connected to the thermal management system 2 and is controlled by the thermal management system 2 and the normally open switch I3011. One end of the normally open switch I3011 is connected to the DC-DC converter 15, and the other end of the normally open switch I3011 is connected to the battery management system 5 and the conversion relay 4 through the controller I3012. The battery management system 5 is connected in series with the DC-DC converter 15 through the normally open switch I3011.

[0026] The conversion relay 4 is a dual-channel conversion relay 401. The dual-channel conversion relay 401 includes a conversion switch 4011 and a controller II 4012. The controller II 4012 is connected to the thermal management system 2 and is controlled by the conversion switch 4011 through the thermal management system 2. One end of the conversion switch 4011 is connected in series with relays B7 and C8. The other end of the conversion switch 4011 is connected to the camera 6 or the battery management system 5. The camera 6 is connected in series with relay B7 through the conversion switch 4011 and is signal-connected to the vehicle-end controller 1 through relay B7.

[0027] Relay B7 is a dual-channel normally open relay II701. The dual-channel normally open relay II701 includes a normally open switch II7011 and a controller III7012. The controller III7012 is connected to the vehicle-end controller 1 and is connected to the normally open switch II7011 through the vehicle-end controller 1. One end of the normally open switch II7011 is connected to the vehicle-end controller 1, and the other end of the normally open switch II7011 is connected in series with relay C8 and is also connected to camera 6 through controller II4012 and changeover switch 4011.

[0028] Relay C8 is a dual-channel normally closed relay 801. The dual-channel normally closed relay 801 includes a normally closed switch 8011 and a controller IV 8012. The controller IV 8012 is connected to the vehicle-end controller 1 and is controlled by the normally closed switch 8011 through the vehicle-end controller 1. One end of the normally closed switch 8011 is connected to the vehicle-end low-voltage power supply 9, and the other end of the normally closed switch 8011 is connected in series with the normally open switch II 7011 and the changeover switch 4011.

[0029] The above-designed system for transmitting and controlling the image signal from the rear of a battery-swapping heavy-duty truck is used to acquire images of the rear of the truck, such as... Figures 1-2 The specific control method of this transmission control system is as follows: When it is not necessary to acquire the rear view image of the vehicle, since the initial position of the switch 4011 of the dual-channel conversion relay 401 is the battery management system 5 position, the vehicle-side low-voltage power supply 9 will directly supply power to the thermal management system 2 and the battery management system 5 via the image control line 10, the switch 4011, and the control bus 11; when it is necessary to acquire the rear view image of the vehicle, the driver first needs to send a command to the vehicle-side controller 1 to acquire the image, and the vehicle-side controller 1 will transmit the received command to the heat pipe via the CAN bus 14. In the thermal management system 2, the system receives an image acquisition command and then controls controller I 3012 to connect normally open switch I 3011 to DC-DC converter 15. Simultaneously, the vehicle-side controller 1, while transmitting the image acquisition command, controls controller IV 8012 to disconnect normally closed switch 8011 from the vehicle-side low-voltage power supply 9. At this time, control bus 11 is taken over by DC-DC converter 15, and the corresponding image control line 10 from the driver's cab 12 to the battery cabinet 13 is disconnected. This allows the power supply for the battery management system 5 to be provided by the DC-DC converter 15 integrated into the thermal management system 2 (e.g., ...). Figure 2(As shown); Secondly, while the DC-DC converter 15 takes over the control bus 11, the thermal management system 2 controls the controller II 4012 to switch the transfer switch 4011 from the position of the battery management system 5 to the position of the camera 6; Finally, the vehicle-side controller 1 controls the controller III 7012 to connect the normally open switch II 7011 to the camera 6 through the image control line 10 and the transfer switch 4011. At this time, the image control line 10 will guide the camera 6 to connect its image signal to the vehicle-side controller 1 and display it, so that the driver can obtain the image of the rear of the battery-swapping heavy truck through the vehicle-side controller 1.

[0030] Comparative Example 1: (Taking power line carrier as an example of transmitting video signals)

[0031] Please see Figure 3 In this comparative example, the configuration of the image signal transmission control system for the rear side of the battery swapping heavy truck is the same as that in Example 1, except that the image signal transmission technology is different. Specifically, the vehicle-side controller 1 is connected in series with a signal demodulator 16, and the vehicle-side low-voltage power supply 9, signal modulator 17 and battery management system 5 are connected in series through the signal demodulator 16. The battery management system 5 and the signal modulator 17 are connected in parallel. The signal modulator 17 is connected in series with a camera 6, and the camera 6 is connected to the vehicle-side controller 1 through the signal modulator 17 and the signal demodulator 16.

[0032] The above-designed system for transmitting and controlling the image signal from the rear of a battery-swapping heavy-duty truck is used to acquire images of the rear of the truck, such as... Figure 3 The specific control method of the transmission control system is as follows: when it is necessary to obtain the image of the rear of the vehicle, the image signal of the camera 6 is modulated by the signal modulator 17 and coupled to the control bus 11 and the image control line 10 and sent to the cab 12. Then, the image signal is demodulated by the signal demodulator 16 in the cab 12 and sent to the vehicle-end controller 1 until it is displayed, so that the driver can obtain the image of the rear of the battery swapping heavy truck through the vehicle-end controller 1.

[0033] Comparing Example 1 with Comparative Example 1, it can be seen that Comparative Example 1 uses signal modulator 17 and signal demodulator 16 to transmit image signals. The image transmission technology is relatively complex, and the cost of signal modulator 17 and signal demodulator 16 is high, making it difficult to promote. In contrast, Example 1 uses inexpensive relays as the control for image signal transmission. The image transmission technology is simple, low-cost, and can ensure the quality of the image displayed on the back of the battery-swapping truck, thus having a promotional effect.

Claims

1. A transmission and control system for rear-side image signals of a battery-swapping heavy-duty truck, comprising a vehicle-end controller and a thermal management system connected to the vehicle-end controller, characterized in that, The thermal management system is connected to relay A and a switching relay. The switching relay is connected to the battery management system and a camera. The camera is connected in series with relay B through the switching relay and is also connected to the vehicle-side controller via relay B. The vehicle-side controller is connected to relay C and is connected to the vehicle-side low-voltage power supply via relay C. The vehicle-side low-voltage power supply is connected in series with the battery management system via relay C and the switching relay. The battery management system is connected in series with the thermal management system via relay A.

2. The transmission and control system for rear image signals of a battery-swapping heavy truck according to claim 1, characterized in that, The vehicle-side controller and the vehicle-side low-voltage power supply are both installed in the cab of the battery-swapping heavy truck. The camera extends from inside the battery cabinet of the battery-swapping heavy truck to the outside of the battery cabinet. The thermal management system and the battery management system are both installed in the battery cabinet of the battery-swapping heavy truck. The battery cabinet is located at the rear of the cab. The thermal management system and the vehicle-side controller are connected by a CAN bus located between the cab and the battery cabinet.

3. The transmission and control system for rear image signals of a battery-swapping heavy truck according to claim 1, characterized in that, An image control line is connected between relay B and the switching relay. A control bus is connected between the switching relay and relay A, and between relay A and the battery management system. The control bus is connected to the image control line through the thermal management system. The image control line passes through the cab of the battery swapping heavy truck and extends into the battery cabinet of the battery swapping heavy truck. The control bus is located in the battery cabinet of the battery swapping heavy truck.

4. The transmission and control system for rear image signals of a battery-swapping heavy truck according to claim 1, characterized in that, The thermal management system has its own DC-DC converter and is connected to relay A for control via the DC-DC converter.

5. The transmission and control system for rear image signals of a battery-swapping heavy truck according to claim 4, characterized in that, The relay A is a dual-channel normally open relay I. The dual-channel normally open relay I includes a normally open switch I and a controller I. The controller I is connected to the thermal management system and is controlled by the normally open switch I through the thermal management system. One end of the normally open switch I is connected to the DC-DC converter, and the other end of the normally open switch I is connected to the battery management system and the conversion relay through the controller I. The battery management system is connected in series with the DC-DC converter through the normally open switch I.

6. The transmission and control system for rear image signals of a battery-swapping heavy truck according to claim 1, characterized in that, The switching relay is a dual-channel switching relay, which includes a switching switch and a controller II. The controller II is connected to the thermal management system and is controlled by the switching switch through the thermal management system. One end of the switching switch is connected in series with relays B and C, and the other end of the switching switch is connected to a camera or a battery management system.

7. The transmission and control system for rear image signals of a battery-swapping heavy truck according to claim 6, characterized in that, The camera is connected in series with relay B via a changeover switch, and then connected to the vehicle-side controller via relay B.

8. The transmission and control system for rear image signals of a battery-swapping heavy truck according to claim 7, characterized in that, The relay B is a dual-channel normally open relay II, which includes a normally open switch II and a controller III. The controller III is connected to the vehicle-side controller and is connected to the normally open switch II through the vehicle-side controller. One end of the normally open switch II is connected to the vehicle-side controller, and the other end of the normally open switch II is connected in series with the relay C and simultaneously connected to the camera through the controller II and the changeover switch.

9. The transmission and control system for rear image signals of a battery-swapping heavy truck according to claim 8, characterized in that, The relay C is a dual-channel normally closed relay, which includes a normally closed switch and a controller IV. The controller IV is connected to the vehicle-end controller and is controlled by the normally closed switch through the vehicle-end controller. One end of the normally closed switch is connected to the vehicle-end low-voltage power supply, and the other end of the normally closed switch is connected in series with the normally open switch II and the changeover switch.

10. A control method for a transmission and control system of rear image signals of a battery-swapping heavy truck, characterized in that, The specific steps for acquiring an image of the rear side of a battery-swapping heavy-duty truck using a transmission and control system for rear image signals as described in any one of claims 1-9 are as follows: First, the vehicle-side controller needs to transmit the image acquisition instruction to the thermal management system via the CAN bus. Upon receiving the image acquisition instruction, the thermal management system controls controller I to connect normally open switch I to the DC-DC converter. Second, while transmitting the image acquisition instruction, the vehicle-side controller controls controller IV to disconnect the normally closed switch from the vehicle-side low-voltage power supply. At this time, the control bus will be taken over by the DC-DC converter, and the corresponding image control line from the cab to the battery cabinet will be disconnected. Third, while the DC-DC converter takes over the control bus, the thermal management system controls controller II to switch the transfer switch to the camera position. Finally, the vehicle-side controller controls controller III to connect normally open switch II to the camera via the image control line and the transfer switch. At this time, the image control line will guide the camera to input its image signal to the vehicle-side controller and display it, which is to acquire the image of the rear side of the battery-swapping heavy-duty truck.

Images