Vehicle and trailer charging and discharging control method, vehicle controller, and vehicle

Abstract

The present invention provides a method for controlling the charging and discharging of a new energy vehicle and a towed vehicle, a vehicle controller, and a vehicle. A towed vehicle is towed behind the new energy vehicle, and the battery system of the new energy vehicle is electrically connected to the battery system of the towed vehicle. The charging and discharging control method includes: determining whether the new energy vehicle and the towed vehicle are currently in a driving state; if so, controlling the battery system of the towed vehicle to transmit electric energy to the battery system of the new energy vehicle when the remaining power of the new energy vehicle is less than a preset first power threshold; if not, determining whether the new energy vehicle and the towed vehicle are currently in a charging state; if so, controlling the power transmission of the charging power input according to the remaining power of the new energy vehicle and the towed vehicle; if not, controlling the power transmission of the battery system of the new energy vehicle according to the remaining power of the towed vehicle. This solution can extend the vehicle's cruising range and improve the ease of use of the electrical equipment of the towed vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of charging and discharging of electric vehicles, and in particular to a charging and discharging control method for a new energy vehicle and a towed vehicle, a whole vehicle controller, and a vehicle. Background Art

[0002] As people's lives continue to improve, their lifestyles are becoming more diverse. Many vehicles are now offering towing capabilities. Furthermore, new energy vehicles are becoming increasingly popular. However, current new energy vehicles present significant inconveniences during long trips or recreational activities due to their low battery density and inadequate charging infrastructure. Camping has become a popular form of recreation, but towing a trailer with a new energy vehicle can significantly reduce its range. Some new energy vehicles with small batteries and heavy trailer weights may even be completely unusable.

[0003] In addition, most of the trailer vehicles currently on the market are energy-free trailer models, and when the vehicles go out for fun, they need to rely on the power supply of the RV base to meet their daily needs.

[0004] Therefore, the new energy vehicles and trailer vehicles in the prior art are inconvenient to use when traveling. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem in the prior art that new energy vehicles and trailer vehicles are inconvenient to use when traveling.

[0006] To address the above-mentioned issues, an embodiment of the present invention discloses a method for controlling charging and discharging of a new energy vehicle and a towing vehicle. The new energy vehicle tows a towing vehicle, and the battery system of the new energy vehicle is electrically connected to the battery system of the towing vehicle. The method includes:

[0007] S1: Acquiring driving status information of the new energy vehicle and the towing vehicle at a preset first time interval, and determining, based on the driving status information, whether the new energy vehicle and the towing vehicle are currently in a driving state where the new energy vehicle tows the towing vehicle;

[0008] If so, the remaining power of the new energy vehicle is obtained in real time, and when the remaining power of the new energy vehicle is less than a preset first power threshold, the battery system of the towing vehicle is controlled to transmit power to the battery system of the new energy vehicle;

[0009] If not, proceed to step S2;

[0010] S2: acquiring charging status information of the new energy vehicle and the towed vehicle at a preset second time interval, and determining, based on the charging status information, whether the new energy vehicle and the towed vehicle are currently in a charging state where the new energy vehicle and / or the towed vehicle are connected to an external charging power source;

[0011] If so, the remaining power of the new energy vehicle and the towed vehicle is obtained in real time, and the power transmission of the charging power input is controlled according to the remaining power of the new energy vehicle and the towed vehicle;

[0012] If not, proceed to step S3;

[0013] S3: Determine that the new energy vehicle and the towing vehicle are currently in a camping state, obtain the remaining power of the towing vehicle in real time, and control the power transmission of the battery system of the new energy vehicle according to the remaining power of the towing vehicle.

[0014] By adopting the above solution, by electrically connecting the battery system of the new energy vehicle with the battery system of the trailer vehicle, the battery systems of the new energy vehicle and the trailer vehicle can effectively complement each other to form a larger battery, which can not only effectively extend the vehicle's range, but also improve the convenience of using the RV's electrical equipment. In addition, by flexibly allocating power transmission methods in different scenarios, the batteries of the new energy vehicle and the trailer vehicle can effectively complement each other. As long as the battery of either vehicle has power, it can be used to drive the new energy vehicle or to power the electrical equipment in the trailer vehicle, thereby improving the utilization rate of electricity.

[0015] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a charge and discharge control method for a new energy vehicle and a towed vehicle, wherein the battery system of the new energy vehicle includes a first battery, a first battery controller, and a motor, and the first battery controller is respectively connected to the first battery and the motor; the battery system of the towed vehicle includes a second battery and a second battery controller, and the second battery is respectively connected to the second battery controller and the electrical equipment of the towed vehicle; the first battery controller is communicatively connected to the second battery controller, and the first battery is electrically connected to the second battery; and a first connector connected to the first battery is further provided at the rear of the new energy vehicle, and a second connector connected to the second battery is further provided at the front of the towed vehicle; the new energy vehicle and the towed vehicle transmit electrical energy via the first connector and the second connector; and a voltage stabilizing component is further provided between the first connector and the first battery, and between the second connector and the second battery.

[0016] With the above solution, since a voltage stabilizing component is provided between the first connector and the first battery, and between the second connector and the second battery, the voltage transmitted from the second battery to the first battery, or from the first battery to the second battery, can be stabilized, so that the working state and service life of the first battery or the second battery will not be affected by a sudden voltage increase.

[0017] According to another specific embodiment of the present invention, a method for controlling charging and discharging of a new energy vehicle and a towed vehicle disclosed in an embodiment of the present invention, wherein, in step S2, when the new energy vehicle and / or the towed vehicle are in a charging state of an external charging power supply, the power transmission input by the charging power supply is controlled according to the remaining power of the new energy vehicle and the towed vehicle, including:

[0018] When the remaining power of the new energy vehicle is less than a preset second power threshold, the power input from the charging power supply is controlled to be transmitted to the first battery after meeting the power demand of the power-consuming equipment, and when the remaining power of the towing vehicle is less than a preset third power threshold, the power input from the charging power supply is controlled to be transmitted to the first battery and the second battery after meeting the power demand of the power-consuming equipment.

[0019] Furthermore, in step S3, when the new energy vehicle and the towed vehicle are currently in a camping state, the power transmission of the battery system of the new energy vehicle is controlled according to the remaining power of the towed vehicle, including:

[0020] When the remaining power of the towing vehicle is less than a preset fourth power threshold, the battery system of the new energy vehicle is controlled to transmit electric energy to the battery system of the towing vehicle.

[0021] With the above solution, when the remaining power of the new energy vehicle is less than the preset second power threshold, the power input from the charging power supply is controlled to be transmitted to the first battery after meeting the power demand of the electrical equipment, so that the first battery can be charged as much as possible while meeting the normal use needs of the towed vehicle for subsequent driving. When the remaining power of the towed vehicle is less than the preset third power threshold, the power input from the charging power supply is controlled to be transmitted to the first battery and the second battery after meeting the power demand of the electrical equipment, so that the first battery and the second battery can be charged at the same time while meeting the normal use needs of the towed vehicle for subsequent driving. When the remaining power of the towed vehicle is less than the preset fourth power threshold, the battery system of the new energy vehicle is controlled to transmit electric energy to the battery system of the towed vehicle. When the towed vehicle has less power during camping, the new energy vehicle can be used to charge the towed vehicle to supplement the power of the towed vehicle, thereby ensuring the power demand of the towed vehicle and improving the user experience.

[0022] According to another specific embodiment of the present invention, the method for controlling charging and discharging of a new energy vehicle and a towed vehicle disclosed in the embodiment of the present invention includes, in step S1, when the remaining power of the new energy vehicle is less than a preset first power threshold, the second battery controller controls the second battery to transfer power to the first battery based on the power demand from the first battery controller; and after determining that the remaining power of the new energy vehicle is less than the preset first power threshold, the method further includes the following steps:

[0023] Determine the relationship between the remaining power of the new energy vehicle and a preset fifth power threshold and a preset sixth power threshold, wherein the fifth power threshold is greater than the sixth power threshold; if the remaining power of the new energy vehicle is less than the first power threshold and greater than or equal to the fifth power threshold, the second battery controller controls the second battery to transmit electric energy to the first battery according to the power demand from the first battery controller; if the remaining power of the new energy vehicle is less than the fifth power threshold and greater than or equal to the sixth power threshold, the second battery controller controls the second battery to transmit electric energy to the motor according to the power demand from the first battery controller; if the remaining power of the new energy vehicle is less than the sixth power threshold, the second battery controller controls the second battery to transmit electric energy to the motor first and then to the first battery according to the charging demand from the first battery controller.

[0024] Moreover, in step S3, when the remaining power of the towed vehicle is less than the preset fourth power threshold, the first battery controller controls the first battery to transmit electric energy to the electrical equipment of the towed vehicle according to the charging demand from the second battery controller; and, after determining that the remaining power of the towed vehicle is less than the preset fourth power threshold, the following steps are also included: determining whether the remaining power of the towed vehicle is less than the preset seventh power threshold; if so, the first battery controller controls the first battery to transmit electric energy to the electrical equipment of the towed vehicle first and then to the second battery according to the charging demand from the second battery controller; if not, continuing to determine whether the remaining power of the towed vehicle is less than the preset seventh power threshold.

[0025] With the above scheme, when the remaining power of the towing vehicle is less than the seventh power threshold, the first battery is controlled to first transmit electric energy to the electrical equipment of the towing vehicle to meet the normal use of the electrical equipment on the towing vehicle, and then transmit electric energy to the second battery to replenish the power of the second battery to ensure the normal operation of the towing vehicle.

[0026] According to another specific embodiment of the present invention, the charging and discharging control method for a new energy vehicle and a towed vehicle disclosed in the embodiment of the present invention, in step S2, after determining that the new energy vehicle and the towed vehicle are currently in a charging state, further includes the following steps: determining the connection status of the charging power supply with the new energy vehicle and the towed vehicle; if the charging power supply is connected to the new energy vehicle, the power of the charging power supply is controlled to be transmitted from the new energy vehicle to the towed vehicle first to meet the power demand of the electrical equipment, and part of the remaining power is used to meet the charging demand of the first battery, and the other part is transmitted to the second battery to meet the charging demand of the second battery; if the charging power supply is connected to the towed vehicle, the power of the charging power supply is controlled to be used to meet the power demand of the electrical equipment first, and part of the remaining power is used to meet the charging demand of the second battery, and the other part is transmitted to the new energy vehicle to meet the charging demand of the first battery; if the charging power supply is connected to the new energy vehicle and the towed vehicle, the power of the charging power supply is controlled to meet the power demand and / or charging demand of the towed vehicle and the new energy vehicle respectively.

[0027] With this solution, when the charging power source is connected to the new energy vehicle or trailer, the electricity is first used to meet the power needs of the trailer's electrical equipment, ensuring the normal operation of the trailer and improving the user experience. Once both the new energy vehicle and the trailer are connected to the charging power source, the corresponding charging power source can meet the charging or power needs of the corresponding vehicle, eliminating the need for energy transfer between the new energy vehicle and the trailer, reducing energy loss and improving charging efficiency.

[0028] According to another specific embodiment of the present invention, the charging and discharging control method for new energy vehicles and towed vehicles disclosed in the embodiment of the present invention, when controlling the transmission of electric energy between the battery system of the towed vehicle and the battery system of the new energy vehicle, also includes: real-time judgment on whether the remaining power of the battery system on the power output side is less than a preset minimum power threshold; if so, stopping the power output on the power output side; if not, continuing to judge whether the remaining power of the battery system on the power output side is less than the preset minimum power threshold.

[0029] The charge and discharge control method also includes: obtaining the temperatures of the first battery and the second battery, and determining whether the temperature of the first battery or the second battery is higher than a preset temperature threshold; if so, cutting off the connection between the first battery and the second battery and generating an alarm; if not, continuing to determine whether the temperature of the first battery or the second battery is higher than the preset temperature threshold.

[0030] With this solution, when the remaining charge of the battery system on the power output side falls below a preset minimum charge threshold, power output from the power output side is stopped, preventing the battery from running low and impacting subsequent normal use. When the temperature of either the first or second battery exceeds a preset temperature threshold, the connection between the first and second batteries is immediately severed, and an alarm is generated. This prevents battery overheating from causing other safety incidents, such as explosions or spontaneous combustion. The generated alarm also serves as a reminder to the user to address the issue promptly, reducing safety risks.

[0031] According to another specific embodiment of the present invention, the charging and discharging control method of the new energy vehicle and the trailer vehicle disclosed in the embodiment of the present invention also includes: obtaining historical driving data of the new energy vehicle and the trailer vehicle, and inputting the historical driving data into a preset prediction model to predict the status of the vehicle in the future.

[0032] Moreover, in step S2, when the remaining power of the new energy vehicle is less than a preset second power threshold and the remaining power of the towed vehicle is less than a preset third power threshold, it also includes: if the state of the vehicle in the future is a driving state, the power input from the charging power supply is controlled to meet the power demand of the electrical equipment and then be transmitted to the first battery and the second battery according to a preset first ratio; if the state of the vehicle in the future is a charging state or a camping state, the power input from the charging power supply is controlled to meet the power demand of the electrical equipment and then be transmitted to the first battery and the second battery according to a preset second ratio; wherein, the power transmitted to the first battery corresponding to the first ratio is greater than the power transmitted to the second battery; and the power transmitted to the first battery corresponding to the second ratio is less than the power transmitted to the second battery.

[0033] By adopting the above scheme, the status of new energy vehicles and towed vehicles is predicted based on historical driving data, and the power input of the charging power supply is adjusted according to the prediction results, which can improve the charging efficiency.

[0034] According to another specific embodiment of the present invention, the charging and discharging control method of new energy vehicles and towed vehicles disclosed in the embodiment of the present invention, the driving status information includes vehicle speed and wheel speed; the charging status information includes the voltage value of the on-board charger and the status of the charging indicator light; and the first time interval ranges from 5min to 30min; the first power threshold ranges from 50% to 70%; the second time interval ranges from 1min to 10min; the second power threshold ranges from 70% to 100%; the third power threshold ranges from 30% to 50%; the fourth power threshold ranges from 20% to 50%; the fifth power threshold ranges from 30% to 50%; the sixth power threshold ranges from 0 to 30%; the seventh power threshold ranges from 0 to 20%; the minimum power threshold ranges from 5% to 10%; the preset temperature threshold ranges from 50℃ to 60℃; the first ratio is 7:3; the second ratio is 4:6.

[0035] An embodiment of the present invention discloses a vehicle controller, comprising: a memory for storing a control program; a processor for executing the steps of the method for controlling the charging and discharging of a new energy vehicle and a towed vehicle as described in any of the above embodiments when processing the control program.

[0036] An embodiment of the present invention discloses a vehicle, including the vehicle controller described in the above embodiment.

[0037] The beneficial effects of the present invention are:

[0038] This solution provides a charge and discharge control method for new energy vehicles and trailer vehicles. By electrically connecting the battery system of the new energy vehicle with the battery system of the trailer vehicle, the battery systems of the new energy vehicle and the trailer vehicle can effectively complement each other to form a larger battery. This can not only effectively extend the vehicle's range, but also improve the ease of use of the RV's electrical equipment. In addition, by flexibly allocating power transmission methods in different scenarios, the batteries of the new energy vehicle and the trailer vehicle can effectively complement each other. As long as the battery of any vehicle has power, it can be used to drive the new energy vehicle or to power the electrical equipment in the trailer vehicle, thereby improving the utilization rate of electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of electrical connection between a new energy vehicle and a towing vehicle provided by an embodiment of the present invention;

[0040] Figure 2 is a control flow chart of the charge and discharge control method provided by an embodiment of the present invention;

[0041] Figure 3 is a schematic structural diagram of a new energy vehicle provided by an embodiment of the present invention;

[0042] Figure 4 It is a schematic structural diagram of a towing vehicle provided by an embodiment of the present invention.

[0043] Description of reference numerals:

[0044] 1. First battery; 2. First battery controller; 3. Motor; 4. Second battery; 5. Second battery controller; 6. Electrical equipment; 7. First socket; 8. Second socket. DETAILED DESCRIPTION

[0045] The following is an explanation of the embodiments of the present invention by specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiment is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0046] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0047] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0048] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0049] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0050] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0051] Example 1:

[0052] In order to solve the problem in the prior art that new energy vehicles and trailer vehicles are inconvenient to use when traveling, an embodiment of the present invention provides a charging and discharging control method for new energy vehicles and trailer vehicles.

[0053] refer to Figure 1 In this specific embodiment, a new energy vehicle tows a trailer vehicle, and the battery system of the new energy vehicle is electrically connected to the battery system of the trailer vehicle. With this arrangement, the battery system of the new energy vehicle is electrically connected to the battery system of the trailer vehicle, allowing the battery systems of the new energy vehicle and the trailer vehicle to transfer power to each other, thereby meeting the power needs of the new energy vehicle and the trailer vehicle in different scenarios.

[0054] Further, in the charge and discharge control method of the new energy vehicle and the towed vehicle according to the present invention, reference is made to Figure 2 , the charge and discharge control method includes:

[0055] S1: Acquiring driving status information of the new energy vehicle and the towing vehicle at a preset first time interval, and determining, based on the driving status information, whether the new energy vehicle and the towing vehicle are currently in a driving state where the new energy vehicle tows the towing vehicle;

[0056] If so, the remaining power of the new energy vehicle is obtained in real time, and when the remaining power of the new energy vehicle is less than a preset first power threshold, the battery system of the towing vehicle is controlled to transmit power to the battery system of the new energy vehicle;

[0057] If not, proceed to step S2;

[0058] S2: acquiring charging status information of the new energy vehicle and the towed vehicle at a preset second time interval, and determining, based on the charging status information, whether the new energy vehicle and the towed vehicle are currently in a charging state where the new energy vehicle and / or the towed vehicle are connected to an external charging power source;

[0059] If so, the remaining power of the new energy vehicle and the towed vehicle is obtained in real time, and the power transmission of the charging power input is controlled according to the remaining power of the new energy vehicle and the towed vehicle;

[0060] If not, proceed to step S3;

[0061] S3: Determine that the new energy vehicle and the towing vehicle are currently in a camping state, obtain the remaining power of the towing vehicle in real time, and control the power transmission of the battery system of the new energy vehicle according to the remaining power of the towing vehicle.

[0062] Specifically, in step S1, the range of the first time interval is 5 minutes to 30 minutes. For example, it can be 5 minutes, 10 minutes, 20 minutes, 30 minutes or other values within the range. Compared with the real-time acquisition method, obtaining the driving status information at the first time interval saves the amount of calculation and improves the efficiency of the method execution. In addition, the driving status information includes the vehicle speed and wheel speed. That is, the vehicle speed and wheel speed of the new energy vehicle and the trailer vehicle respectively. When the speed of the new energy vehicle and the trailer vehicle are both greater than 2 km / h, or the wheel speed is greater than 30 rad / min, it means that the current driving state is that the new energy vehicle is towing the trailer vehicle. More specifically, the range of the first power threshold is 50% to 70%, for example, it can be 50%, 58.5%, 70%, or other values within the range. The method has such a step that, when in driving state, when the remaining power of the new energy vehicle is less than a first power threshold, the battery system of the towing vehicle is controlled to transmit electric energy to the battery system of the new energy vehicle, so that the battery system of the towing vehicle can be used to charge the battery system of the new energy vehicle to ensure that the new energy vehicle can tow the towing vehicle normally.

[0063] More specifically, in step S2, the second time interval ranges from 1 minute to 10 minutes; for example, it can be 1 minute, 3 minutes, 5.5 minutes, 10 minutes, or other values within this range. Acquiring charging status information at the second time interval reduces computational effort and improves method execution efficiency compared to real-time acquisition. Furthermore, when the new energy vehicle and the trailer vehicle are charging, they can have three different charging power supply connection methods: the new energy vehicle connected to an external charging power supply, the trailer connected to an external charging power supply, or both the new energy vehicle and the trailer connected to external charging power supplies. This will be described in detail in the embodiments below. Charging status information includes the voltage of the onboard charger and the status of the charging indicator. When the voltage of the onboard charger is greater than 10V or the charging indicator remains constant, the vehicle is currently charging. By including this step, during the charging state, the power input from the charging power supply is controlled based on the remaining power of the new energy vehicle and the trailer vehicle. This allows for targeted replenishment of the power of the new energy vehicle and the trailer vehicle based on the remaining power of the trailer vehicle, while still meeting the normal usage needs of the trailer vehicle, thereby improving charging efficiency.

[0064] More specifically, when the new energy vehicle and the towing vehicle are currently in a camping state, the remaining power of the towing vehicle is obtained in real time, and the power transmission of the battery system of the new energy vehicle is controlled according to the remaining power of the towing vehicle, so as to give priority to meeting the power demand of the towing vehicle and improve the user experience.

[0065] Further, in the charge and discharge control method of the new energy vehicle and the towed vehicle according to the present invention, reference is made to Figure 1 The battery system of the new energy vehicle includes a first battery 1, a first battery controller 2, and a motor 3. The first battery controller 2 is connected to the first battery 1 and the motor 3 respectively. It should be noted that the first battery 1, the first battery controller 2, and the motor 3 are all batteries, battery controllers, and motors commonly used in existing new energy vehicles, and this embodiment does not specifically limit their models. In addition, the first battery 1, the first battery controller 2, and the motor 3 are connected by wires to ensure the efficiency and stability of signal transmission. It should also be noted that the first battery 1 is installed on the chassis of the new energy vehicle, and a battery pack with a larger capacity is preferred, such as a battery pack with a capacity of more than 100 kWh. The charging port for charging the first battery 1 is installed on the side of the new energy vehicle to facilitate layout and wiring. The first battery controller 2 is arranged near the first battery 1 and the motor 3 to reduce the difficulty and cost of wiring harness layout.

[0066] It should also be noted that the trailer vehicle's battery system includes a second battery 4 and a second battery controller 5. The second battery 4 is connected to the second battery controller 5 and the trailer vehicle's electrical equipment 6, respectively. It should be noted that the second battery 4 and second battery controller 5 are commonly used batteries and battery controllers in existing trailer vehicles, such as RVs. The electrical equipment can be lamps, cookers, or other electrical equipment installed in RVs or other trailer vehicles, and this embodiment does not specifically limit their models and types. Furthermore, the second battery 4, the second battery controller 5, and the trailer vehicle's electrical equipment 6 are connected by wires to ensure efficient and stable signal transmission. Furthermore, the first battery controller 2 is in communication with the second battery controller 5, specifically wirelessly. The first battery 1 is electrically connected to the second battery 4. It should be understood that the first and second batteries 1 and 4 are electrically connected only when power transmission is required; they do not need to be electrically connected otherwise. Furthermore, the second battery 4 is also installed on the trailer vehicle's chassis, preferably with a larger capacity, such as one with a capacity exceeding 100 kWh. The charging port for charging the second battery 4 is installed on the side of the new energy vehicle to facilitate layout and wiring.

[0067] Furthermore, in the charge and discharge control method of the new energy vehicle and the towed vehicle according to the present invention, reference is made to Figure 3 and Figure 4 The rear of the new energy vehicle is further provided with a first connector 7 connected to the first battery 1, and the front of the towing vehicle is further provided with a second connector 8 connected to the second battery 4. The new energy vehicle and the towing vehicle transmit electrical energy via the first connector 7 and the second connector 8.

[0068] Furthermore, in the charge and discharge control method for the new energy vehicle and the towed vehicle according to the present invention, a voltage stabilizing component is further provided between the first connector 7 and the first battery 1, and between the second connector 8 and the second battery 4. The voltage stabilizing component can be a voltage stabilizing circuit composed of diodes, and those skilled in the art can also choose other implementation methods according to actual needs. In this embodiment, since the voltage stabilizing component is provided between the first connector 7 and the first battery 1, and between the second connector 8 and the second battery 4, the voltage transmitted from the second battery 4 to the first battery 1, or the voltage transmitted from the first battery 1 to the second battery 4, can be stabilized, so that the working state and service life of the first battery 1 or the second battery 4 will not be affected by a sudden increase in voltage.

[0069] Furthermore, in the charging and discharging control method for a new energy vehicle and a towed vehicle according to the present invention, in step S2, when the new energy vehicle and / or the towed vehicle are in a charging state of an external charging power source, the power transmission of the charging power source input is controlled based on the remaining power of the new energy vehicle and the towed vehicle, including: when the remaining power of the new energy vehicle is less than a preset second power threshold, the power input from the charging power source is controlled to be transmitted to the first battery after meeting the power demand of the power-consuming device; and when the remaining power of the towed vehicle is less than a preset third power threshold, the power input from the charging power source is controlled to be transmitted to the first battery and the second battery after meeting the power demand of the power-consuming device. The second power threshold ranges from 70% to 100%; for example, it can be 70%, 85%, 100%, or other values within this range. The third power threshold ranges from 30% to 50%; for example, it can be 30%, 40%, 50%, or other values within this range. The method comprises the following steps: when the remaining power of the new energy vehicle is less than a preset second power threshold, the power input from the charging power source is controlled to meet the power demand of the power-consuming device and then transferred to the first battery, thereby enabling the first battery to store as much power as possible for subsequent driving while still meeting the normal use needs of the towed vehicle. When the remaining power of the towed vehicle is less than a preset third power threshold, the power input from the charging power source is controlled to meet the power demand of the power-consuming device and then transferred to the first battery and the second battery, thereby enabling the first battery and the second battery to store power simultaneously for subsequent driving while still meeting the normal use needs of the towed vehicle.

[0070] Furthermore, in the charge and discharge control method for a new energy vehicle and a towed vehicle according to the present invention, in step S3, when the new energy vehicle and the towed vehicle are currently in a camping state, power transfer from the new energy vehicle's battery system is controlled based on the remaining power of the towed vehicle, including: when the remaining power of the towed vehicle is less than a preset fourth power threshold, controlling the battery system of the new energy vehicle to transfer power to the battery system of the towed vehicle. Specifically, the fourth power threshold ranges from 20% to 50%, and can be, for example, 20%, 35%, 50%, or other values within this range. This method includes the step of controlling the battery system of the new energy vehicle to transfer power to the battery system of the towed vehicle when the remaining power of the towed vehicle is less than the preset fourth power threshold. When the towed vehicle's power is low during camping, the new energy vehicle can charge the towed vehicle to supplement the towed vehicle's power, thereby ensuring the towed vehicle's power needs and improving the user experience.

[0071] Furthermore, in the charge and discharge control method for a new energy vehicle and a towed vehicle according to the present invention, in step S1, when the remaining power of the new energy vehicle is less than a preset first power threshold, the second battery controller controls the second battery to transfer power to the first battery based on the power demand from the first battery controller. The power demand includes the driving power required by the motor or the first battery, which may be 25kw / h, for example. The second battery controller controls the voltage and current when the second battery transfers power to the first battery based on the power demand of the first battery and the motor obtained by the first battery controller.

[0072] Furthermore, in the charge and discharge control method for a new energy vehicle and a towed vehicle according to the present invention, after determining that the remaining power of the new energy vehicle is less than a preset first power threshold, the method further includes the following steps: determining the relationship between the remaining power of the new energy vehicle and a preset fifth power threshold and a preset sixth power threshold, wherein the fifth power threshold is greater than the sixth power threshold; if the remaining power of the new energy vehicle is less than the first power threshold and greater than or equal to the fifth power threshold, the second battery controller controls the second battery to transfer power to the first battery according to the power demand from the first battery controller; if the remaining power of the new energy vehicle is less than the fifth power threshold and greater than or equal to the sixth power threshold, the second battery controller controls the second battery to transfer power to the motor according to the power demand from the first battery controller; if the remaining power of the new energy vehicle is less than the sixth power threshold, the second battery controller controls the second battery to transfer power to the motor first and then to the first battery according to the charging demand from the first battery controller. Specifically, the fifth power threshold is in the range of 30% to 50%; for example, it can be 30%, 40%, 50%, or other values within this range. The sixth power threshold value ranges from 0 to 30%; for example, it can be 0, 20%, 30%, or other values within the range. Further, in the charge and discharge control method of the new energy vehicle and the towed vehicle according to the present invention, in step S3, when the remaining power of the towed vehicle is less than the preset fourth power threshold value, the first battery controller controls the first battery to transmit electric energy to the electrical equipment of the towed vehicle according to the charging demand from the second battery controller. The charging demand is the required power and current voltage value of the second battery obtained by the second battery controller. The first battery controller controls the voltage and current of the first battery when transmitting electric energy to the electrical equipment of the towed vehicle according to the charging demand.

[0073] Furthermore, in the charge and discharge control method for the new energy vehicle and the towed vehicle according to the present invention, after determining that the remaining power of the towed vehicle is less than a preset fourth power threshold, the following steps are further included:

[0074] determining whether the remaining power of the towing vehicle is less than a preset seventh power threshold;

[0075] If so, the first battery controller controls the first battery to transmit power to the electrical equipment of the towing vehicle first and then to the second battery according to the charging demand from the second battery controller;

[0076] If not, continue to determine whether the remaining power of the towing vehicle is less than a preset seventh power threshold.

[0077] Specifically, the seventh power threshold ranges from 0 to 20%; for example, it can be 0, 10%, 20%, or other values within this range. The method includes the following steps: when the remaining power of the towed vehicle is less than the seventh power threshold, the first battery is controlled to first transmit power to the electrical equipment of the towed vehicle to meet the normal use of the electrical equipment on the towed vehicle, and then the power is transmitted to the second battery to replenish the power of the second battery to ensure the normal operation of the towed vehicle.

[0078] Furthermore, in the method for controlling the charging and discharging of a new energy vehicle and a towed vehicle according to the present invention, in step S2, after determining that the new energy vehicle and the towed vehicle are currently in a charging state, the method further includes the following steps: determining the connection status of the charging power source with the new energy vehicle and the towed vehicle; if the charging power source is connected to the new energy vehicle, controlling the power of the charging power source to be preferentially transferred from the new energy vehicle to the towed vehicle to meet the power needs of the electrical equipment, and using a portion of the remaining power to meet the charging needs of the first battery and another portion to meet the charging needs of the second battery. In other words, in the charging state, the normal operation of the electrical equipment on the towed vehicle must be ensured first, and then the charging needs of the first and second batteries must be met. Therefore, when the charging power source is connected to the new energy vehicle, the power input from the charging power source is first transferred from the new energy vehicle to the towed vehicle, and then used to meet the charging needs of the charging power source and the second battery.

[0079] Furthermore, in the charge and discharge control method for the new energy vehicle and the towed vehicle according to the present invention, when controlling the transmission of electric energy between the battery system of the towed vehicle and the battery system of the new energy vehicle, the method further includes:

[0080] Determine in real time whether the remaining power of the battery system on the power output side is less than the preset minimum power threshold;

[0081] If so, stop the power output on the power output side;

[0082] If not, continue to determine whether the remaining power of the battery system on the power output side is less than a preset minimum power threshold.

[0083] Specifically, the range of the minimum power threshold is 5% to 10%, for example, it can be 5%, 8%, 10%, or other values within this range. It should be noted that when the new energy vehicle transmits electricity to the towed vehicle, the power output side is the new energy vehicle; when the towed vehicle outputs electricity to the new energy vehicle, the power output side is the towed vehicle. With such a step, when the remaining power of the battery system on the power output side is less than the preset minimum power threshold, the power output on the power output side is stopped, which can prevent the battery on the power output side from running out of power and affecting subsequent normal use.

[0084] Furthermore, in the charge and discharge control method for the new energy vehicle and the towed vehicle according to the present invention, the charge and discharge control method further includes:

[0085] Obtaining the temperatures of the first battery and the second battery, and determining whether the temperature of the first battery or the second battery is higher than a preset temperature threshold;

[0086] If so, disconnecting the first battery from the second battery and generating an alarm;

[0087] If not, continue to determine whether the temperature of the first battery or the second battery is higher than a preset temperature threshold.

[0088] Specifically, the preset temperature threshold range is 50°C to 60°C, for example, it can be 50°C, 55°C, 60°C, or other temperatures within this range. The alarm prompt includes but is not limited to displaying on the instrument panel of the new energy vehicle, or generating a voice alarm prompt in the new energy vehicle or towing vehicle, etc., which can be set by those skilled in the art according to actual needs. With such a step, when the temperature of the first battery or the second battery is higher than the preset temperature threshold, the connection between the first battery and the second battery is immediately cut off, and an alarm prompt is generated, which can prevent the battery from overheating and causing other safety accidents, such as explosion, spontaneous combustion, etc., and the generation of an alarm prompt can also remind the user to deal with it as soon as possible, reducing safety hazards.

[0089] Furthermore, in the charge and discharge control method for a new energy vehicle and a towed vehicle according to the present invention, the charge and discharge control method further includes: obtaining historical driving data of the new energy vehicle and the towed vehicle, and inputting the historical driving data into a preset prediction model to predict the vehicle's state within a future period. Furthermore, in step S2, when the remaining power of the new energy vehicle is less than a preset second power threshold and the remaining power of the towed vehicle is less than a preset third power threshold, the method further includes: if the vehicle's state within the future period is driving, controlling the power input from the charging power source to be transferred to the first battery and the second battery according to a preset first ratio after meeting the power demand of the power-consuming device; and if the vehicle's state within the future period is charging or camping, controlling the power input from the charging power source to be transferred to the first battery and the second battery according to a preset second ratio after meeting the power demand of the power-consuming device. The first ratio corresponds to a greater amount of power transferred to the first battery than to the second battery, and the second ratio corresponds to a less amount of power transferred to the first battery than to the second battery.

[0090] Specifically, historical driving data refers to the status of the new energy vehicle and the trailer vehicle at each moment in the past period of time. For example, the driving status is from 8:00 am to 12:00 pm, the charging status is from 12:00 pm to 4:00 pm, and the camping status is from 4:00 pm to 12:00 am.

[0091] More specifically, the first ratio is 7:3; the second ratio is 4:6. That is, if the prediction results indicate that the new energy vehicle and the towed vehicle will be in a driving state for a period of time in the future, the power input from the charging power source is controlled to transfer 70% of the power to the first battery and 30% to the second battery after meeting the power needs of the towed vehicle's electrical devices, thereby ensuring normal operation of the new energy vehicle while in driving. If the prediction results indicate that the new energy vehicle and the towed vehicle will be in a camping state for a period of time in the future, the power input from the charging power source is controlled to transfer 40% of the power to the first battery and 60% to the second battery after meeting the power needs of the towed vehicle's electrical devices, thereby ensuring normal operation of the towed vehicle while in camping and meeting the various needs of the user. Furthermore, by predicting the state of the new energy vehicle and the towed vehicle based on historical driving data and adjusting the power input from the charging power source based on the prediction results, charging efficiency can be improved.

[0092] Example 2:

[0093] Based on the charge and discharge control method for a new energy vehicle and a towed vehicle provided in the above embodiment, this embodiment also provides another charge and discharge control method for a new energy vehicle and a towed vehicle.

[0094] The charge and discharge control method for a new energy vehicle and a towed vehicle provided in this embodiment differs from the above-mentioned embodiment only in that, in step S2, after determining that the new energy vehicle and the towed vehicle are currently in a charging state, if the charging power source is connected to the towed vehicle, the power of the charging power source is controlled to be used to meet the power demand of the electrical equipment first, and part of the remaining power is used to meet the charging demand of the second battery, and the other part is transmitted to the new energy vehicle to meet the charging demand of the first battery.

[0095] In other words, when charging, the primary function is to ensure the normal operation of the electrical devices on the towed vehicle, followed by the charging of the first and second batteries. Therefore, when the charging power source is connected to the towed vehicle, the power input from the charging power source is first used directly to meet the power needs of the electrical devices on the towed vehicle, a portion of which is then used to charge the towed vehicle itself, and the remaining portion is transferred to the new energy vehicle to charge the first battery. This ensures the normal operation of the towed vehicle and also stores energy for subsequent driving.

[0096] Example 3:

[0097] Based on the charge and discharge control method for a new energy vehicle and a towed vehicle provided in the above embodiment, this embodiment also provides another charge and discharge control method for a new energy vehicle and a towed vehicle.

[0098] The method for controlling the charging and discharging of a new energy vehicle and a towed vehicle provided in this embodiment differs from the above-mentioned embodiment only in that, in step S2, after determining that the new energy vehicle and the towed vehicle are currently in a charging state, if the charging power source is connected to the new energy vehicle and the towed vehicle, the power of the charging power source is controlled to meet the power consumption and / or charging needs of the towed vehicle and the new energy vehicle respectively.

[0099] In other words, when both the new energy vehicle and the towed vehicle are connected to a charging power source, the corresponding charging power source can meet the charging or power needs of the corresponding vehicle, eliminating the need for energy transfer between the new energy vehicle and the towed vehicle. This eliminates the need for energy transfer, reduces energy loss, and improves charging efficiency.

[0100] Example 4:

[0101] This embodiment differs from the previous embodiment in that there is no connection between the first battery and the second battery. During power transmission, power is transmitted from the first battery to the first battery controller and then to the second battery via the second battery controller, or from the second battery to the second battery controller and then to the first battery via the first battery controller.

[0102] Example 5:

[0103] Based on the above-mentioned charge and discharge control method for new energy vehicles and trailer vehicles, this embodiment provides a specific charge and discharge control method for new energy vehicles and trailer vehicles. Figure 1 .

[0104] First, the electric energy transmission method between the new energy vehicle and the towing vehicle when the new energy vehicle is currently in a driving state where the towing vehicle is towing the new energy vehicle is described.

[0105] When the remaining charge of the new energy vehicle's first battery 1 exceeds α, the first battery 1 drives the motor 3 via the first battery controller 2, driving the new energy vehicle normally. This corresponds to the normal driving mode of the new energy vehicle. α = [100%, 70%).

[0106] When the remaining power of the first battery 1 of the new energy vehicle is less than β, the second battery 4 of the towing vehicle charges the first battery 1 through the second battery controller 5 and the first battery controller 2. The specific process is: the first battery controller 2 sends the charging power that the first battery 1 can accept and the current voltage signal of the first battery 1 (for example, power 15kw / h, voltage 350V) to the second battery controller 5, and the second battery controller 5 charges according to the demand signal sent by the first battery controller 2 (for example, voltage 355V, current 42.3A). This corresponds to the direct charging mode of the new energy vehicle battery. Among them, β = [70%, 50%).

[0107] When the remaining power of the first battery 1 of the new energy vehicle is less than γ, the second battery 4 of the towing vehicle supplies power to the motor 3 of the new energy vehicle through the second battery controller 5 and the first battery controller 2 to drive the vehicle. The specific process is: the first battery controller 2 sends the driving power signal required by the motor 3 (for example, power 25kw / h) to the second battery controller 5 in real time, and the second battery controller 5 outputs current according to the demand signal sent by the first battery controller 2 to drive the motor 3 to work (for example, voltage 345V, current 72.5A). This corresponds to the direct drive mode of the new energy vehicle motor. Among them, γ = [50%, 30%).

[0108] When the remaining power of the first battery 1 of the new energy vehicle is less than δ, the second battery 4 of the towing vehicle, through the second battery controller 5 and the first battery controller 2, not only supplies power to the motor 3 of the new energy vehicle to drive the vehicle, but also allocates part of the power to charge the first battery 1. The specific process is as follows: the first battery controller 2 sends the real-time driving power signal required by the motor 3 (for example, power 25kw / h), the charging power that the first battery 1 can accept, and the battery voltage signal (for example, power 15kw / h, voltage 350V) to the second battery controller 5. The second battery controller 5 outputs current according to the total demand signal sent by the first battery controller 2 to drive the motor 3 to work (for example, voltage 355V, current 112.7A). This corresponds to the new energy vehicle shared supply mode. Wherein, δ = [30%, 0%].

[0109] Next, a description is given of a method of transmitting electric energy between the new energy vehicle and the towed vehicle when the new energy vehicle and / or the towed vehicle are currently in a charging state where the new energy vehicle and / or the towed vehicle are connected to an external charging power source.

[0110] When the remaining power of the first battery 1 of the new energy vehicle is greater than θ and the remaining power of the second battery 4 is greater than ι, the second battery controller 5 controls the power input from the charging port to be used only for the electrical equipment 6 of the towing vehicle.

[0111] When the remaining power of the first battery 1 of the new energy vehicle is less than θ and the remaining power of the second battery 4 is greater than ι, the second battery controller 5 and the first battery controller 2 jointly control the power input from the charging port to be used by the electric devices 6 of the towing vehicle, and to allocate part of the power to charge the first battery 1 of the new energy vehicle. The specific process is as follows: the battery controller of the towing vehicle calculates the power demand of the towing vehicle (for example, power of 3.5kw / h), and supplies the charging power received through the charging port (for example, power of 15kw / h) to the electric devices 6 according to the demand. The remaining charging power (11.5kw / h) is converted into direct current and input to the first battery controller 2. The first battery controller 2 charges the power into the new first battery 1 (for example, voltage of 345V, current of 33.3A), or directly transfers the power from the second battery 4 to the first battery 1.

[0112] When the remaining power of the first battery 1 of the new energy vehicle is less than θ, and the remaining power of the second battery 4 is less than ι, the second battery controller 5 and the first battery controller 2 jointly control the power of the charging port to supply the power to the electrical equipment 6, and allocate part of the power to charge the first battery 1 and the second battery 4. The specific process is: the second battery controller 5 calculates the power demand of the towing vehicle (for example, power 3.5kw / h), and supplies the charging power received through the charging port (for example, power 15Kw / h) to the electrical equipment 6 according to demand, and the remaining charging power (11.5kw / h) is converted into direct current in proportion and input into the first battery 1 (for example, voltage 345V, current 16.7A). Wherein, θ = [100%, 70%], ι = [50%, 30%]

[0113] Finally, the power transmission method when the new energy vehicle and the towed vehicle are currently in a camping state is explained.

[0114] When the remaining power of the second battery 4 is greater than ε, the second battery controller 5 controls the second battery 4 to supply power to the power-consuming device 6. This corresponds to the normal power supply mode of the trailer, where ε = [100%, 50%).

[0115] When the remaining charge of the second battery 4 is less than ζ, the first battery 1 supplies power to the power-consuming device 6 via the second battery controller 5 and the first battery controller 2. The process is as follows: the second battery controller 5 sends a charging power and battery voltage signal (e.g., 5 kW / h, 340 V) to the first battery controller 2, which then charges according to the signal (e.g., 345 V, 14.5 A). This corresponds to trailer direct charging mode. Here, ζ = [50%, 20%).

[0116] When the remaining charge of the first battery 1 is less than η, the first battery 1 supplies power to the electrical device 6 through the second battery controller 5 and the first battery controller 2, while also dividing some of its charge to charge the second battery 4. The process is as follows: The second battery controller 5 sends a real-time power signal indicating the power required by the electrical device 6 (e.g., 5 kW / h) and the battery's acceptable charging power and voltage signal (e.g., 10 kW / h, 350 V) to the second battery controller 5. The second battery controller 5 then outputs current according to the total demand signal sent by the first battery controller 2 to drive the motor 3 (e.g., 355 V, 42.3 A). This corresponds to the trailer power distribution mode. Here, η = [20%, 0%].

[0117] Example 6:

[0118] Based on the above-mentioned charge and discharge control method for new energy vehicles and trailer vehicles, this embodiment further provides a vehicle controller, including a memory and a controller.

[0119] In the vehicle controller, the memory is used to store the control program. When the processor processes the control program, the processor executes the steps of the method for controlling the charging and discharging of a new energy vehicle and a towed vehicle as described in any of the above embodiments.

[0120] It should be noted that the memory is a hardware entity with a storage function, and the controller is a hardware entity with a function of executing a preset strategy. Both use the memory and controller commonly used in the vehicle's whole vehicle controller. This embodiment does not limit their models.

[0121] Furthermore, the vehicle controller provided in this embodiment, because its processor executes the steps of the charge-discharge control method for a new energy vehicle and a trailer as described in any of the above embodiments when processing the control program, enables the battery systems of the new energy vehicle and the trailer to transfer power to each other, thereby meeting the power needs of the new energy vehicle and the trailer in different scenarios and improving ease of use. Furthermore, different charge-discharge strategies can be implemented when the new energy vehicle and the trailer are in driving, charging, or camping states, thereby improving power utilization and charging efficiency.

[0122] Example 7:

[0123] Based on the vehicle controller provided in the above embodiment, this embodiment further provides a vehicle, including the vehicle controller described in the above embodiment.

[0124] It should be noted that the vehicle provided in this embodiment can be a new energy vehicle or a trailer vehicle, as long as the vehicle is equipped with the vehicle controller described in the above embodiment.

[0125] Furthermore, the vehicle provided in this embodiment, because it incorporates the vehicle controller provided in the aforementioned embodiment, enables the battery systems of the new energy vehicle and the trailer to transfer power to each other, thereby meeting the power needs of the new energy vehicle and the trailer in different scenarios and improving ease of use. Furthermore, different charging and discharging strategies can be implemented when the new energy vehicle and the trailer are in driving, charging, or camping mode, thereby improving power utilization and charging efficiency.

[0126] Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood by those skilled in the art that the above description is provided as a further detailed description of the present invention in conjunction with specific embodiments thereof, and that the specific implementation of the present invention is not limited to these descriptions. Those skilled in the art may make various changes in form and details, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A method for controlling the charging and discharging of a new energy vehicle and a towed vehicle, characterized in that: The new energy vehicle tows the towing vehicle, and the battery system of the new energy vehicle is electrically connected to the battery system of the towing vehicle; and The charge and discharge control method includes: S1: Acquiring driving status information of the new energy vehicle and the towing vehicle at a preset first time interval, and determining, based on the driving status information, whether the new energy vehicle and the towing vehicle are currently in a driving state where the new energy vehicle tows the towing vehicle; If so, obtaining the remaining power of the new energy vehicle in real time, and when the remaining power of the new energy vehicle is less than a preset first power threshold, controlling the battery system of the towing vehicle to transmit power to the battery system of the new energy vehicle; If not, proceed to step S2; S2: acquiring charging status information of the new energy vehicle and the towed vehicle at a preset second time interval, and determining, based on the charging status information, whether the new energy vehicle and the towed vehicle are currently in a charging state where the new energy vehicle and / or the towed vehicle are connected to an external charging power source; If so, obtaining the remaining power of the new energy vehicle and the towed vehicle in real time, and controlling the power transmission of the charging power input according to the remaining power of the new energy vehicle and the towed vehicle; If not, proceed to step S3; S3: Determining that the new energy vehicle and the towing vehicle are currently in a camping state, obtaining the remaining power of the towing vehicle in real time, and controlling power transmission of the battery system of the new energy vehicle according to the remaining power of the towing vehicle; the battery system of the new energy vehicle includes a first battery, a first battery controller, and a motor, and the first battery controller is connected to the first battery and the motor respectively; The battery system of the towing vehicle includes a second battery and a second battery controller, wherein the second battery is connected to the second battery controller and the electrical equipment of the towing vehicle respectively; The first battery controller is communicatively connected to the second battery controller, and the first battery is electrically connected to the second battery; and The rear of the new energy vehicle is further provided with a first connector connected to the first battery, and the front of the towing vehicle is further provided with a second connector connected to the second battery; The new energy vehicle and the towing vehicle transmit electric energy via the first socket and the second socket; and A voltage stabilizing component is further provided between the first socket and the first battery, and between the second socket and the second battery; In step S2, when the new energy vehicle and / or the towed vehicle are in a charging state of an external charging power source, controlling the power transmission of the charging power source input according to the remaining power of the new energy vehicle and the towed vehicle includes: When the remaining power of the new energy vehicle is less than a preset second power threshold, the power input from the charging power source is controlled to be transmitted to the first battery after meeting the power demand of the power-consuming device, and when the remaining power of the towed vehicle is less than a preset third power threshold, the power input from the charging power source is controlled to be transmitted to the first battery and the second battery after meeting the power demand of the power-consuming device; and In step S3, when the new energy vehicle and the towed vehicle are currently in a camping state, controlling the power transmission of the battery system of the new energy vehicle according to the remaining power of the towed vehicle includes: When the remaining power of the towing vehicle is less than a preset fourth power threshold, the battery system of the new energy vehicle is controlled to transmit electric energy to the battery system of the towing vehicle.

2. The method for controlling the charge and discharge of a new energy vehicle and a towed vehicle according to claim 1, wherein: In step S1, when the remaining power of the new energy vehicle is less than a preset first power threshold, the second battery controller controls the second battery to transmit power to the first battery according to the power demand from the first battery controller; and After determining that the remaining power of the new energy vehicle is less than a preset first power threshold, the method further includes the following steps: Determining a relationship between the remaining power of the new energy vehicle and a preset fifth power threshold and a preset sixth power threshold, wherein the fifth power threshold is greater than the sixth power threshold; If the remaining power of the new energy vehicle is less than the first power threshold and greater than or equal to the fifth power threshold, the second battery controller controls the second battery to transmit power to the first battery according to the power demand from the first battery controller; If the remaining power of the new energy vehicle is less than the fifth power threshold and greater than or equal to the sixth power threshold, the second battery controller controls the second battery to transmit power to the motor according to the power demand from the first battery controller; If the remaining power of the new energy vehicle is less than the sixth power threshold, the second battery controller controls the second battery to transmit power to the motor first and then to the first battery according to the charging demand from the first battery controller; and In step S3, when the remaining power of the towing vehicle is less than a preset fourth power threshold, the first battery controller controls the first battery to transmit power to the electrical equipment of the towing vehicle according to the charging demand from the second battery controller; and After determining that the remaining power of the towing vehicle is less than a preset fourth power threshold, the method further includes the following steps: determining whether the remaining power of the towing vehicle is less than a preset seventh power threshold; If so, the first battery controller controls the first battery to transmit power to the electrical equipment of the towing vehicle first and then to the second battery according to the charging demand from the second battery controller; If not, continue to determine whether the remaining power of the towing vehicle is less than a preset seventh power threshold.

3. The method for controlling the charge and discharge of a new energy vehicle and a towed vehicle according to claim 2, wherein in step S2, after determining that the new energy vehicle and the towed vehicle are currently in the charging state, the method further comprises the following steps: Determining the connection status of the charging power source with the new energy vehicle and the towing vehicle; If the charging power source is connected to the new energy vehicle, the power of the charging power source is controlled to be preferentially transferred from the new energy vehicle to the towing vehicle to meet the power demand of the power-consuming device, and part of the remaining power is used to meet the charging demand of the first battery, and the other part is transferred to the second battery to meet the charging demand of the second battery; If the charging power source is connected to the towing vehicle, the power of the charging power source is controlled to be used to meet the power demand of the power-consuming device first, and part of the remaining power is used to meet the charging demand of the second battery, and the other part is transmitted to the new energy vehicle to meet the charging demand of the first battery; If the charging power source is connected to the new energy vehicle and the towing vehicle, the power level of the charging power source is controlled to meet the power consumption and / or charging requirements of the towing vehicle and the new energy vehicle respectively.

4. The method for controlling the charge and discharge of a new energy vehicle and a towed vehicle according to claim 3, wherein: When controlling the transmission of electric energy between the battery system of the towing vehicle and the battery system of the new energy vehicle, the method further includes: Determine in real time whether the remaining power of the battery system on the power output side is less than the preset minimum power threshold; If yes, stopping the power output of the power output side; If not, continue to determine whether the remaining power of the battery system on the power output side is less than a preset minimum power threshold; and The charge and discharge control method further includes: obtaining temperatures of the first battery and the second battery, and determining whether the temperature of the first battery or the second battery is higher than a preset temperature threshold; If so, cutting off the connection between the first battery and the second battery and generating an alarm prompt; If not, continue to determine whether the temperature of the first battery or the second battery is higher than a preset temperature threshold.

5. The method for controlling the charge and discharge of a new energy vehicle and a towed vehicle according to claim 4, wherein: The charge and discharge control method further includes: Obtaining historical driving data of the new energy vehicle and the towed vehicle, and inputting the historical driving data into a preset prediction model to predict the status of the vehicles in the future; and In step S2, when the remaining power of the new energy vehicle is less than a preset second power threshold and the remaining power of the towed vehicle is less than a preset third power threshold, the method further includes: If the vehicle is in a driving state within a certain period of time in the future, the power input from the charging power source is controlled to be transmitted to the first battery and the second battery according to a preset first ratio after meeting the power demand of the power-consuming device; If the vehicle is in a charging state or a camping state within a certain period of time in the future, the power input from the charging power source is controlled to meet the power demand of the power-consuming device and then transferred to the first battery and the second battery according to a preset second ratio; The first ratio corresponds to a state where the amount of electricity transmitted to the first battery is greater than the amount of electricity transmitted to the second battery; The second ratio corresponds to a smaller amount of electricity transmitted to the first battery than to the second battery.

6. The method for controlling the charge and discharge of a new energy vehicle and a towed vehicle according to claim 5, wherein: The driving state information includes vehicle speed and wheel speed; The charging status information includes the voltage value of the vehicle charger and the status of the charging indicator light; and The first time interval ranges from 5 minutes to 30 minutes; The first power threshold ranges from 50% to 70%; The second time interval ranges from 1 minute to 10 minutes; The second power threshold ranges from 70% to 100%; The third power threshold ranges from 30% to 50%; The fourth power threshold ranges from 20% to 50%; The fifth power threshold ranges from 30% to 50%; The sixth power threshold ranges from 0 to 30%; The seventh power threshold ranges from 0 to 20%; The minimum power threshold ranges from 5% to 10%; The preset temperature threshold range is 50°C to 60°C; The first ratio is 7:3; The second ratio is 4:

6.

7. A vehicle controller, characterized in that: include: a memory, wherein the memory is used to store a control program; A processor, wherein when processing the control program, the processor executes the steps of the charging and discharging control method for a new energy vehicle and a towed vehicle as described in any one of claims 1 to 6.

8. A vehicle, characterized in that: Including the vehicle controller as claimed in claim 7.

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