New energy trailer power system, control method, trailer and heavy truck

Abstract

The invention discloses a new energy trailer power system, a control method, a trailer and a heavy truck, a front electric drive axle, a middle electric drive axle and a rear electric drive axle are sequentially arranged in the length direction of the new energy trailer, a power battery is arranged, and the power battery is connected with the front electric drive axle, the middle electric drive axle and the rear electric drive axle. The electric motor is used for providing electric energy for the front electric drive axle, the middle electric drive axle and the rear electric drive axle; a front electric drive axle, a middle electric drive axle and a rear electric drive axle are sequentially arranged on a new energy trailer to provide driving force, a power battery provides electric energy, and three bearing axles are replaced by three electric drive axles on the basis of an existing trailer, so that the refitting difficulty is reduced; and the new energy trailer can be matched with the tractor for auxiliary driving through the front electric drive axle, the middle electric drive axle and the rear electric drive axle, so that the dynamic property of the whole vehicle is improved, and meanwhile the front electric drive axle, the middle electric drive axle and the rear electric drive axle of the new energy trailer can be used for recycling braking energy so as to improve the economical efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of new energy trailers, and specifically to a new energy trailer power system, a control method, a trailer and a heavy truck. Background Art

[0002] With the continuous development of new energy technologies, more and more vehicles have adopted new energy drive systems. As one of the main carriers of land transportation, heavy trucks usually have a large load, resulting in poor fuel economy. In order to improve the fuel economy of heavy trucks, more and more new energy heavy trucks have emerged. The tractor and trailer of new energy heavy trucks are driven together through power coupling, which can effectively improve the fuel economy of new energy heavy trucks. However, the axles used in trailers are currently trailer axles, which only have load-bearing and braking functions. In order to realize the modification of trailers to achieve electrification, it is necessary to add motors to the trailers and add power batteries to the trailers or tractors, which will make the modification of new energy heavy trucks more difficult and costly. Therefore, a power system structure that can simply realize new energy trailers is needed. Summary of the invention

[0003] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide a new energy trailer power system, a control method, a trailer and a heavy truck.

[0004] According to one aspect of the present application, a new energy trailer power system is provided, comprising: a front electric drive axle, a middle electric drive axle and a rear electric drive axle arranged in sequence along the length direction of the new energy trailer; a power battery, the power battery is connected to the front electric drive axle, the middle electric drive axle and the rear electric drive axle, and is used to provide electrical energy to the front electric drive axle, the middle electric drive axle and the rear electric drive axle.

[0005] In one embodiment, the front electric drive axle includes a first drive motor, a first clutch, and a first reducer connected in sequence, the middle electric drive axle includes a second drive motor, a second clutch, and a second reducer connected in sequence, and the rear electric drive axle includes a third drive motor, a third clutch, and a third reducer connected in sequence.

[0006] In one embodiment, the reduction ratio of the first reducer is greater than the reduction ratio of the second reducer and the reduction ratio of the third reducer.

[0007] In one embodiment, the new energy trailer power system also includes: a trailer power controller, which is communicatively connected to the vehicle controller of the tractor, and is used to receive drive status information sent by the vehicle controller of the tractor, and generate control instructions for controlling the operation of the front electric drive axle, the middle electric drive axle and the rear electric drive axle based on the drive status information.

[0008] In one embodiment, the new energy trailer power system also includes: a battery management system, which is connected to the power battery and the trailer power controller, and is used to monitor the status parameters of the power battery and send the status parameters of the power battery to the trailer power controller.

[0009] According to another aspect of the present application, a control method for a new energy trailer power system is provided, which is applied to any of the new energy trailer power systems described above, and the control method for the new energy trailer power system includes: obtaining driving status information of a tractor connected to the new energy trailer; wherein the driving status information is obtained from a vehicle controller of the tractor connected to the new energy trailer; obtaining status parameters of the power battery; obtaining road operation information of the new energy trailer; wherein the road operation information is collected by vehicle-mounted sensors and / or a vehicle-mounted navigation system; and controlling the operation of the front electric drive axle, the middle electric drive axle and the rear electric drive axle based on the driving status information, the status parameters of the power battery and the road operation information.

[0010] In one embodiment, controlling the operation of the front electric drive axle, the middle electric drive axle and the rear electric drive axle based on the driving status information, the status parameters of the power battery and the road operation information includes: controlling the operation of part or all of the front electric drive axle, the middle electric drive axle and the rear electric drive axle based on the driving status information, the status parameters of the power battery and the road operation information.

[0011] In one embodiment, the control method of the new energy trailer power system also includes: obtaining parameter information of the drive system of the tractor; obtaining road surface information of the operating scenario road of the new energy trailer; and generating operation control strategies of the front electric drive axle, the middle electric drive axle and the rear electric drive axle based on the parameter information of the drive system of the tractor and the road surface information of the operating scenario road of the new energy trailer.

[0012] According to another aspect of the present application, a new energy trailer is provided, comprising: a new energy trailer power system as described in any one of the above items.

[0013] According to another aspect of the present application, a new energy heavy truck is provided, comprising: a tractor and the new energy trailer as described above.

[0014] The present application provides a new energy trailer power system, control method, trailer and heavy truck, which are achieved by sequentially arranging a front electric drive axle, a middle electric drive axle and a rear electric drive axle along the length direction of the new energy trailer, and arranging a power battery, wherein the power battery is connected to the front electric drive axle, the middle electric drive axle and the rear electric drive axle to provide electric energy to the front electric drive axle, the middle electric drive axle and the rear electric drive axle; that is, the front electric drive axle, the middle electric drive axle and the rear electric drive axle are sequentially arranged on the new energy trailer to provide driving force, and the power battery provides electric energy, and on the basis of the existing trailer, the three load-bearing axles are replaced with three electric drive axles to reduce the difficulty of modification, and the front electric drive axle, the middle electric drive axle and the rear electric drive axle can be used to realize the auxiliary drive of the new energy trailer in cooperation with the tractor to improve the power of the whole vehicle, and at the same time, the front electric drive axle, the middle electric drive axle and the rear electric drive axle of the new energy trailer can also be used to realize braking energy recovery to improve economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0016] Figure 1 It is a structural diagram of a new energy trailer power system provided by an exemplary embodiment of the present application.

[0017] Figure 2 It is a flow chart of a control method of a new energy trailer power system provided by an exemplary embodiment of the present application.

[0018] Figure 3 It is a structural schematic diagram of a new energy heavy-duty truck power system provided by an exemplary embodiment of the present application.

[0019] Figure 4 It is a structural diagram of an electronic device provided by an exemplary embodiment of the present application.

[0020] Explanation of the accompanying drawings: 1. front electric drive axle; 2. middle electric drive axle; 3. rear electric drive axle; 4. power battery; 5. first drive motor; 6. first clutch; 7. first reducer; 8. second drive motor; 9. second clutch; 10. second reducer; 11. third drive motor; 12. third clutch; 13. third reducer; 14. trailer power controller; 15. battery management system; 16. motor controller; 17. load-bearing axle; 18. engine; 19. tractor clutch; 20. gearbox; 21. tractor drive axle; 22. vehicle controller. DETAILED DESCRIPTION

[0021] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0022] Figure 1 : is a structural diagram of a new energy trailer power system provided by an exemplary embodiment of the present application. Figure 1 As shown, the power system of the new energy trailer includes: a front electric drive bridge 1, a middle electric drive bridge 2 and a rear electric drive bridge 3 arranged in sequence along the length direction of the new energy trailer, and a power battery 4; wherein the power battery 4 is connected to the front electric drive bridge 1, the middle electric drive bridge 2 and the rear electric drive bridge 3, and is used to provide electric energy to the front electric drive bridge 1, the middle electric drive bridge 2 and the rear electric drive bridge 3.

[0023] The present application replaces the trailer axle with an electric drive axle, and utilizes the front electric drive axle 1, the middle electric drive axle 2 and the rear electric drive axle 3 to realize the electric drive of the trailer, so that multiple power systems can be realized in conjunction with the tractor to drive new energy heavy trucks (including tractors and new energy trailers). The power battery 4 can be arranged in front of the front drive axle 1 and behind the traction pin between the tractor and the trailer. The power battery 4 is used to provide electric energy to the front electric drive axle 1, the middle electric drive axle 2 and the rear electric drive axle 3 and store the electric energy recovered by braking of the front electric drive axle 1, the middle electric drive axle 2 and the rear electric drive axle 3. In the present application, the front electric drive axle 1, the middle electric drive axle 2 and the rear electric drive axle 3 can be driven individually, or they can participate in the driving partially or completely. For example, one or more (one or two or three) electric drive axles can output positive torque (i.e., provide the driving torque required for the new energy heavy-duty truck to travel), and the remaining electric drive axles can output negative torque (i.e., provide torque opposite to the driving direction of the new energy heavy-duty truck to achieve braking recovery). One or more electric drive axles can output positive torque and the remaining electric drive axles can not work, one or more electric drive axles can output negative torque and the remaining electric drive axles can not work, or all electric drive axles can not work.

[0024] The present application provides a new energy trailer power system, which is achieved by sequentially arranging a front electric drive axle, a middle electric drive axle and a rear electric drive axle along the length direction of the new energy trailer, and arranging a power battery, wherein the power battery is connected to the front electric drive axle, the middle electric drive axle and the rear electric drive axle to provide electrical energy to the front electric drive axle, the middle electric drive axle and the rear electric drive axle; that is, the front electric drive axle, the middle electric drive axle and the rear electric drive axle are sequentially arranged on the new energy trailer to provide driving force, and the power battery provides electrical energy, and on the basis of the existing trailer, the three load-bearing axles are replaced with three electric drive axles to reduce the difficulty of modification, and the front electric drive axle, the middle electric drive axle and the rear electric drive axle can be used to realize the auxiliary drive of the new energy trailer in cooperation with the tractor to improve the power of the whole vehicle, and at the same time, the front electric drive axle, the middle electric drive axle and the rear electric drive axle of the new energy trailer can also be used to realize braking energy recovery to improve economy.

[0025] In one embodiment, if Figure 1 As shown, the front electric drive bridge 1 may include a first drive motor 5, a first clutch 6, and a first reducer 7 connected in sequence, the middle electric drive bridge 2 may include a second drive motor 8, a second clutch 9, and a second reducer 10 connected in sequence, and the rear electric drive bridge 3 may include a third drive motor 11, a third clutch 12, and a third reducer 13 connected in sequence.

[0026] The present application realizes the driving function of the front electric drive axle 1 by setting a first drive motor 5, a first clutch 6, and a first reducer 7 which are connected in sequence; similarly, a second drive motor 8, a second clutch 9, a second reducer 10 and a third drive motor 11, a third clutch 12, and a third reducer 13 are set to respectively realize the driving functions of the middle electric drive axle 2 and the rear drive axle 3.

[0027] In one embodiment, the reduction ratio of the first reducer 7 is greater than the reduction ratio of the second reducer 10 and the reduction ratio of the third reducer 13 .

[0028] The present application can set the reduction ratio of the first reducer 7 to be greater than the reduction ratio of the second reducer 10 and the reduction ratio of the third reducer 13, so as to realize electric drive axles with different reduction ratios, so as to adapt to different working conditions. For example, the front drive axle 1 has a higher driving efficiency at low speed, so the front drive axle 1 is mainly responsible for providing a larger driving torque at the vehicle start and low-speed driving stage, and when the vehicle speed is high, the back electromotive force may affect the components of the front electric drive axle 1, so during high-speed driving, the first clutch 6 is disconnected to prevent the front drive axle 1 from intervening in the drive. Optionally, the present application can set the second reducer 10 and the third reducer 13 to the same reduction ratio to be responsible for the power output and brake energy recovery during high-speed driving of the vehicle. It should be understood that the present application can also set the reduction ratios of the second reducer 10 and the third reducer 13 to be different according to the needs of the actual application scenario, so as to further distinguish the power output and brake energy recovery under medium speed and high-speed working conditions, so as to further optimize the driving efficiency and brake recovery efficiency.

[0029] In one embodiment, if Figure 1 As shown, the above-mentioned new energy trailer power system may also include: a trailer power controller 14, which is communicatively connected to the vehicle controller of the tractor, and is used to receive driving status information sent by the vehicle controller of the tractor, and generate control instructions for controlling the operation of the front electric drive axle 1, the middle electric drive axle 2 and the rear electric drive axle 3 based on the driving status information.

[0030] The present application sets a trailer power controller 14, and the trailer power controller 14 is connected to the vehicle controller of the tractor in communication, so as to obtain the driving state information sent by the vehicle controller of the tractor, including engine torque, engine speed, gearbox gear, accelerator pedal opening, brake pedal opening and other driving state information. The trailer power controller 14 determines the driver's posture intention and driving force demand according to the driving state information of the tractor, so as to better control the operation of the front electric drive axle 1, the middle electric drive axle 2 and the rear electric drive axle 3 to cooperate with the tractor to realize the driving of the new energy heavy truck. It should be understood that the driving system of the tractor in the present application can be a fuel driving system (engine system), an electric driving system, or a hybrid driving system including both an engine system and an electric driving system. As long as the driving system of the tractor can read and provide driving force, the present application does not limit the driving system of the tractor.

[0031] In one embodiment, if Figure 1 As shown, the above-mentioned new energy trailer power system may also include: a battery management system 15, the battery management system 15 is connected to the power battery 4 and the trailer power controller 14, and is used to monitor the state parameters of the power battery 4 and send the state parameters of the power battery 4 to the trailer power controller 14.

[0032] The present application sets up a battery management system 15 to monitor the status parameters of the power battery 4 in real time. The specific status parameters include the SOC, output voltage or input voltage, output current or input current, etc. of the power battery 4. The present application monitors the status parameters of the power battery 4 and sends the status parameters of the power battery 4 to the trailer power controller 14, so that the trailer power controller 14 can better control the operation of the front electric drive axle 1, the middle electric drive axle 2 and the rear electric drive axle 3 in combination with the status parameters of the power battery 4, and effectively maintain the use status and effect of the power battery 4 while ensuring the driving efficiency.

[0033] In one embodiment, if Figure 1 As shown, the above-mentioned new energy trailer power system may also include: a motor controller 16, the motor controller 16 is connected to the trailer power controller 14 and the drive motor (including the first drive motor 5, the second drive motor 8, and the third drive motor 11), the motor controller 16 receives the control instruction of the trailer power controller 14, and controls the operation of the corresponding drive motor based on the control instruction. It should be understood that the present application may set independent motor controllers for the first drive motor 5, the second drive motor 8, and the third drive motor 11, respectively, or may use one motor controller to control the first drive motor 5, the second drive motor 8, and the third drive motor 11 at the same time.

[0034] Figure 2: is a flow chart of a control method of a new energy trailer power system provided by an exemplary embodiment of the present application. The control method of the new energy trailer power system is applied to any of the above-mentioned new energy trailer power systems, and specifically, can be applied to the above-mentioned trailer power controller, such as Figure 2 As shown, the control method of the new energy trailer power system includes the following steps: Step 210: Acquire driving status information of the tractor connected to the new energy trailer.

[0035] The driving state information is obtained from the vehicle controller of the tractor connected to the new energy trailer. The present application obtains the driving state information of the tractor from the vehicle controller of the tractor through wired (such as CAN bus) or wireless communication to obtain the driver's current driving intention and the driving torque required by the current driving intention.

[0036] Step 220: Obtain state parameters of the power battery.

[0037] The present application obtains the status parameters of the power battery in real time through the battery management system, and sends the status parameters of the power battery to the trailer power controller in real time, thereby achieving the acquisition of the status parameters of the power battery.

[0038] Step 230: Obtain road operation information of the new energy trailer.

[0039] The road operation information is collected by the vehicle-mounted sensors and / or the vehicle-mounted navigation system. The trailer power controller of the present application obtains the road operation information from the vehicle-mounted sensors and the vehicle-mounted navigation system by means of CAN bus, etc. The specific road operation information includes navigation information, vehicle speed information, slope information, etc.

[0040] Step 240: Based on the driving state information, the state parameters of the power battery and the road operation information, the operation of the front electric drive axle, the middle electric drive axle and the rear electric drive axle is controlled.

[0041] After obtaining the driving status information of the tractor, the status parameters of the power battery and the road operation information, the present application determines the optimal driving scheme based on the driving status information, the status parameters of the power battery and the road operation information, and controls the operation of the front electric drive axle, the middle electric drive axle and the rear electric drive axle based on the driving scheme.

[0042] The present application provides a control method for a power system of a new energy trailer, which comprises the following steps: sequentially arranging a front electric drive axle, a middle electric drive axle and a rear electric drive axle along the length direction of the new energy trailer, and arranging a power battery, wherein the power battery is connected to the front electric drive axle, the middle electric drive axle and the rear electric drive axle to provide electric energy to the front electric drive axle, the middle electric drive axle and the rear electric drive axle, and obtaining driving state information of the tractor, state parameters of the power battery and road operation information, and determining an optimal driving scheme based on the driving state information, the state parameters of the power battery and the road operation information. The dynamic scheme controls the operation of the front electric drive axle, the middle electric drive axle and the rear electric drive axle; that is, the front electric drive axle, the middle electric drive axle and the rear electric drive axle are arranged in sequence on the new energy trailer to provide driving force, and the power battery provides electric energy. On the basis of the existing trailer, the three load-bearing axles are replaced with three electric drive axles to reduce the difficulty of modification, and the front electric drive axle, the middle electric drive axle and the rear electric drive axle can be used to realize the auxiliary drive of the new energy trailer and the tractor to improve the power of the whole vehicle. At the same time, the front electric drive axle, the middle electric drive axle and the rear electric drive axle of the new energy trailer can also be used to realize braking energy recovery to improve economy.

[0043] In one embodiment, the specific implementation method of the above step 240 can be: based on the driving state information, the state parameters of the power battery and the road operation information, control the partial or complete operation of the front electric drive axle, the middle electric drive axle and the rear electric drive axle.

[0044] From the above analysis, it can be seen that the present application can select part or all of the front electric drive axle, the middle electric drive axle and the rear electric drive axle to operate according to the actual operating conditions to achieve multiple driving modes. While improving driving efficiency and energy-saving effects, it can also take into account the performance of the power battery and driving comfort.

[0045] In one embodiment, the control method of the new energy trailer power system may further include: obtaining parameter information of the driving system of the tractor; obtaining road surface information of the operating scenario roads of the new energy trailer; and generating operation control strategies for the front electric drive axle, the middle electric drive axle and the rear electric drive axle based on the parameter information of the driving system of the tractor and the road surface information of the operating scenario roads of the new energy trailer.

[0046] When the tractor and trailer are connected for the first time, the tractor opens the information port to the trailer so that the trailer power controller can obtain the parameter information of the tractor's drive system: engine and gearbox power parameters, such as engine external characteristic curve, engine fuel consumption universal characteristic diagram, gearbox gear and speed ratio, etc. This application obtains the parameter information of the tractor's drive system and the vehicle operation scene road information set (including time, vehicle speed, slope, etc.) to support the trailer power controller to optimize the offline strategy. Specifically, the parameter information of the tractor's drive system and the road surface information of the new energy trailer's operation scene road are input into the strategy training model at the same time, so as to generate the new energy trailer power system control strategy according to the parameter information of the tractor's drive system and the road surface information of the new energy trailer's operation scene road. This set of control strategies can be remotely updated to the trailer power controller through Over-the-Air Technology (OTA) to control the partial or complete operation of the front electric drive axle, the middle electric drive axle and the rear electric drive axle according to the driving state information and road operation information of the tractor during actual operation.

[0047] The present application also provides a new energy trailer, including: a new energy trailer power system as any one of the above items.

[0048] The present application provides a new energy trailer, which is provided with a front electric drive axle, a middle electric drive axle and a rear electric drive axle in sequence along the length direction of the new energy trailer, and a power battery is provided, wherein the power battery is connected to the front electric drive axle, the middle electric drive axle and the rear electric drive axle to provide electric energy to the front electric drive axle, the middle electric drive axle and the rear electric drive axle; that is, the front electric drive axle, the middle electric drive axle and the rear electric drive axle are arranged in sequence on the new energy trailer to provide driving force, and the power battery provides electric energy, and on the basis of the existing trailer, the three load-bearing axles are replaced with three electric drive axles to reduce the difficulty of modification, and the front electric drive axle, the middle electric drive axle and the rear electric drive axle can be used to realize the auxiliary drive of the new energy trailer in cooperation with the tractor to improve the power of the whole vehicle, and at the same time, the front electric drive axle, the middle electric drive axle and the rear electric drive axle of the new energy trailer can also be used to realize braking energy recovery to improve economy.

[0049] Figure 3 Schematic diagram of the structure of a new energy heavy truck power system provided by an exemplary embodiment of the present application. Figure 3 As shown, the new energy heavy truck includes: a tractor and the new energy trailer as mentioned above; wherein the tractor includes a load-bearing bridge 17, an engine 18, a tractor clutch 19, a gearbox 20, a tractor drive axle 21 and a vehicle controller 22.

[0050] The present application provides a new energy heavy-duty truck, which is provided with a front electric drive axle, a middle electric drive axle and a rear electric drive axle in sequence along the length direction of the new energy trailer, and a power battery is provided, wherein the power battery is connected to the front electric drive axle, the middle electric drive axle and the rear electric drive axle to provide electric energy to the front electric drive axle, the middle electric drive axle and the rear electric drive axle; that is, the front electric drive axle, the middle electric drive axle and the rear electric drive axle are arranged in sequence on the new energy trailer to provide driving force, and the power battery provides electric energy, and on the basis of the existing trailer, the three load-bearing axles are replaced with three electric drive axles to reduce the difficulty of modification, and the front electric drive axle, the middle electric drive axle and the rear electric drive axle can be used to realize the auxiliary drive of the new energy trailer in cooperation with the tractor to improve the power of the whole vehicle, and at the same time, the front electric drive axle, the middle electric drive axle and the rear electric drive axle of the new energy trailer can also be used to realize braking energy recovery to improve economy.

[0051] Below, reference Figure 4 To describe the electronic device according to the embodiment of the present application. The electronic device may be the above-mentioned trailer power controller or a functional module of a part of the trailer power controller, and the electronic device may be any one or both of the first device and the second device, or a stand-alone device independent of them, and the stand-alone device may communicate with the first device and the second device to receive the collected input signals from them.

[0052] Figure 4 A block diagram of an electronic device according to an embodiment of the present application is illustrated.

[0053] like Figure 4 As shown, the electronic device 100 includes one or more processors 110 and a memory 120 .

[0054] The processor 110 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 100 to perform desired functions.

[0055] The memory 120 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 110 may run the program instructions to implement the methods of the various embodiments of the present application described above and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage medium.

[0056] In one example, the electronic device 100 may further include: an input device 130 and an output device 140 , and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0057] When the electronic device is a stand-alone device, the input device 130 may be a communication network connector for receiving collected input signals from the first device and the second device.

[0058] In addition, the input device 130 may also include, for example, a keyboard, a mouse, and the like.

[0059] The output device 140 can output various information to the outside, including the determined distance information, direction information, etc. The output device 140 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0060] Of course, to simplify, Figure 4 Only some of the components related to the present application in the electronic device 100 are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application situations, the electronic device 100 may also include any other appropriate components.

[0061] In addition to the above-mentioned methods and devices, an embodiment of the present application may also be a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the steps of the method according to various embodiments of the present application described in the above-mentioned "Exemplary Method" section of this specification.

[0062] The computer program product may be written in any combination of one or more programming languages ​​to write program codes for performing the operations of the embodiments of the present application, including object-oriented programming languages, such as Java, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0063] In addition, an embodiment of the present application may also be a computer-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed by a processor, the processor executes the steps of the method according to various embodiments of the present application described in the above "Exemplary Method" section of this specification.

[0064] The computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0065] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0066] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0067] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0068] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0069] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A new energy trailer power system, characterized in that: include: A front electric drive axle, a middle electric drive axle and a rear electric drive axle are arranged in sequence along the length direction of the new energy trailer; A power battery is connected to the front electric drive axle, the middle electric drive axle and the rear electric drive axle, and is used to provide electric energy to the front electric drive axle, the middle electric drive axle and the rear electric drive axle.

2. The new energy trailer power system according to claim 1, characterized in that: The front electric drive axle includes a first drive motor, a first clutch, and a first reducer connected in sequence; the middle electric drive axle includes a second drive motor, a second clutch, and a second reducer connected in sequence; and the rear electric drive axle includes a third drive motor, a third clutch, and a third reducer connected in sequence.

3. The new energy trailer power system according to claim 2, characterized in that: The reduction ratio of the first reducer is greater than the reduction ratio of the second reducer and the reduction ratio of the third reducer.

4. The new energy trailer power system according to claim 1, characterized in that: The new energy trailer power system also includes: a trailer power controller, which is communicatively connected to the vehicle controller of the tractor, and is used to receive drive status information sent by the vehicle controller of the tractor, and generate control instructions for controlling the operation of the front electric drive axle, the middle electric drive axle and the rear electric drive axle based on the drive status information.

5. The new energy trailer power system according to claim 4, characterized in that: The new energy trailer power system also includes: a battery management system, which is connected to the power battery and the trailer power controller, and is used to monitor the state parameters of the power battery and send the state parameters of the power battery to the trailer power controller.

6. A control method for a new energy trailer power system, characterized in that: Applicable to the new energy trailer power system described in any one of claims 1 to 5 above, the control method of the new energy trailer power system comprises: Acquire driving state information of the tractor connected to the new energy trailer; wherein the driving state information is acquired by a vehicle controller of the tractor connected to the new energy trailer; Acquiring state parameters of the power battery; Acquiring road operation information of the new energy trailer; wherein the road operation information is collected by a vehicle-mounted sensor and / or a vehicle-mounted navigation system; Based on the driving state information, the state parameters of the power battery and the road operation information, the operation of the front electric drive axle, the middle electric drive axle and the rear electric drive axle is controlled.

7. The control method of the new energy trailer power system according to claim 6, characterized in that: The controlling the operation of the front electric drive axle, the middle electric drive axle and the rear electric drive axle based on the driving state information, the state parameter of the power battery and the road operation information comprises: Based on the driving state information, the state parameters of the power battery and the road operation information, partial or all operations of the front electric drive axle, the middle electric drive axle and the rear electric drive axle are controlled.

8. The control method of the new energy trailer power system according to claim 6, characterized in that: The control method of the new energy trailer power system also includes: Acquiring parameter information of a driving system of the tractor; Obtaining road surface information of the operation scenario road of the new energy trailer; Based on the parameter information of the driving system of the tractor and the road surface information of the operating scenario road of the new energy trailer, the operation control strategies of the front electric drive axle, the middle electric drive axle and the rear electric drive axle are generated.

9. A new energy trailer, characterized in that: include: A new energy trailer power system as described in any one of claims 1 to 5.

10. A new energy heavy truck, characterized in that: include: A tractor and a new energy trailer as claimed in claim 9.

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