Vehicle-to-vehicle charging method and apparatus

Abstract

The embodiment of the application provides a vehicle-to-vehicle charging method and device. The vehicle-to-vehicle charging method detects the temperature of a power supply device in a power supply vehicle, and the power supply vehicle can dynamically adjust the duty cycle of a clock pulse signal according to the temperature of the power supply device, thereby adjusting the size of the charging current output by the power supply device, realizing adaptive adjustment of the discharge power of the power supply vehicle, guaranteeing the safety of the power supply vehicle in charging the vehicle to be charged in a low-temperature environment, and reducing the probability of damage to components caused by the discharge of the power supply vehicle in the low-temperature environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicle charging management, in particular, the present application relates to a vehicle-to-vehicle charging method and device. BACKGROUND

[0002] At present, with the increasing attention to environmental protection and energy problems, in order to cope with environmental and energy crisis, the research and development and large-scale use of electric vehicles have become an inevitable trend. Compared with fuel vehicles, after a period of driving, the electric vehicle needs to be charged when the power is exhausted. Generally, the electric vehicle is charged through the charging pile arranged at the fixed place. However, in some cases, the electric vehicle may run out of power before reaching the charging pile. In such a case, the vehicle owner can only find a rescue tow truck to send the electric vehicle to the nearest fixed charging pile or charge the vehicle through a mobile charging vehicle equipped with a mobile charging pile. However, the time and money cost of the two ways are relatively high, which brings inconvenience to the user.

[0003] There are electric vehicles that can both charge and discharge in the market. Such electric vehicles are equipped with bidirectional vehicle-mounted bidirectional chargers that can both charge and discharge. However, the discharge power of the existing electric vehicles that can both charge and discharge is a fixed value. In actual use, because of the complex environment, various problems may occur, especially in the use scene of cold regions. When the vehicle parts and vehicle-mounted chargers are not hot or cannot reach the rated power due to too low temperature, it is extremely easy to cause fatal damage to the components of the vehicle-mounted bidirectional charger at the discharge vehicle end when the discharge gun is plugged into the discharge vehicle to discharge the charging vehicle. SUMMARY

[0004] The present application proposes a vehicle-to-vehicle charging method and device to solve the technical problems of the existing method.

[0005] In a first aspect, the present application provides a vehicle-to-vehicle charging method applied to a power supply vehicle, comprising the following steps:

[0006] When the charging gun connection signal is detected, the state information of the vehicle to be charged sent by the vehicle to be charged is received;

[0007] According to the state information of the vehicle to be charged, the rated current output to the vehicle to be charged is determined;

[0008] When the temperature of the power supply device in the power supply vehicle is less than a first temperature threshold, the duty cycle of the clock pulse signal is adjusted to be not greater than a first duty cycle threshold; when the temperature of the power supply device is greater than or equal to a second temperature threshold, the duty cycle of the clock pulse signal is adjusted to be a rated duty cycle corresponding to the rated current; the second temperature threshold is greater than the first temperature threshold;

[0009] outputting a charging current corresponding to the clock pulse signal to charge the vehicle to be charged.

[0010] Optionally, when detecting that the temperature of the power supply device in the power supply vehicle is less than a first temperature threshold, the method further comprises:

[0011] controlling heating of the power supply device until the temperature of the power supply device is greater than or equal to the second temperature threshold.

[0012] Optionally, when detecting that the temperature of the power supply device in the power supply vehicle is greater than or equal to the first temperature threshold and less than the second temperature threshold, the method further comprises adjusting the duty cycle of the clock pulse signal to be greater than or equal to a first duty cycle threshold and less than a second duty cycle threshold.

[0013] Optionally, when the temperature of the power supply device is greater than the second temperature threshold, adjusting the duty cycle of the clock pulse signal to the rated duty cycle comprises:

[0014] the duty cycle of the clock pulse signal increases to the rated duty cycle by a fixed step length within a predetermined time.

[0015] Optionally, when detecting that the power supply vehicle is in a first fault state, adjusting the duty cycle of the clock pulse signal to a first fault duty cycle.

[0016] adjusting the charging current output according to the first fault duty cycle.

[0017] Optionally, when detecting that the power supply vehicle is in a second fault state, adjusting the duty cycle of the clock pulse signal to the first duty cycle threshold.

[0018] In a second aspect, the embodiments of the present application provide a vehicle-to-vehicle charging device applied to a power supply vehicle, comprising:

[0019] a signal receiver configured to receive state information of a vehicle to be charged sent by the vehicle to be charged;

[0020] a temperature detector configured to detect temperature information of a power supply device in the power supply vehicle;

[0021] The controller is electrically connected with the signal receiver and the temperature detector, and is configured to determine a rated current output to the vehicle to be charged according to the information about the state to be charged and the temperature information, and specifically includes: when detecting that the temperature of the power supply device in the power supply vehicle is less than a first temperature threshold, adjusting a duty cycle of a clock pulse signal to be not greater than a first duty cycle threshold; and when the temperature of the power supply device is greater than or equal to a second temperature threshold, adjusting the duty cycle of the clock pulse signal to be a rated duty cycle corresponding to the rated current, wherein the second temperature threshold is greater than the first temperature threshold.

[0022] The current converter is electrically connected with the controller, and is configured to output a charging current corresponding to the clock pulse signal to charge the vehicle to be charged.

[0023] Optionally, the vehicle-to-vehicle charging device further includes a circulation pipeline and a heating device arranged on the circulation pipeline.

[0024] The circulation pipeline is arranged on the power supply device, and the heating device is configured to heat a fluid in the circulation pipeline.

[0025] Optionally, the vehicle-to-vehicle charging device further includes an alarm mechanism electrically connected with the controller, and configured to send a warning information when the power supply vehicle is in a first fault state or a second fault state.

[0026] In a third aspect, an embodiment of the present application provides a vehicle-to-vehicle charging method applied to a vehicle to be charged, and includes the following steps:

[0027] After detecting a charging gun connection signal, sending information about a state to be charged to a power supply vehicle, and controlling to enter a charging mode; so that the power supply vehicle determines a rated current output to the vehicle to be charged according to the information about the state to be charged; when detecting that the temperature of a power supply device in the power supply vehicle is less than a first temperature threshold, adjusting a duty cycle of a clock pulse signal to be not greater than a first duty cycle threshold; when the temperature of the power supply device is greater than or equal to a second temperature threshold, adjusting the duty cycle of the clock pulse signal to be a rated duty cycle corresponding to the rated current; the second temperature threshold is greater than the first temperature threshold; and outputting a charging current corresponding to the clock pulse signal.

[0028] In the charging mode, receiving the charging current from the power supply vehicle. In a fourth aspect, an embodiment of the present application provides a vehicle-to-vehicle charging device applied to a vehicle to be charged, and includes:

[0029] A signal transmitter configured to send information about a state to be charged to a power supply vehicle;

[0030] A processor, in communication connection with the signal transmitter, is configured to control the to-be-charged vehicle to enter a charging mode, and receive the charging current from the power supply vehicle.

[0031] The technical scheme provided by the embodiments of the present application has the beneficial technical effects including:

[0032] The vehicle-to-vehicle charging method provided by the embodiments of the present application can dynamically adjust the duty cycle of the clock pulse signal according to the temperature of the power supply device, so as to adjust the size of the charging current output by the power supply device, and realize adaptive adjustment of the discharging power of the power supply vehicle, thereby guaranteeing the safety of the power supply vehicle in charging the to-be-charged vehicle in a low-temperature environment, and reducing the probability of damage to components caused by discharging of the power supply vehicle in a low-temperature environment.

[0033] Additional aspects and advantages of the present application will be made apparent from the following description, which, taken together with the accompanying drawings, describes and illustrates embodiments thereof. BRIEF DESCRIPTION OF DRAWINGS

[0034] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken together with the accompanying drawings, in which:

[0035] Figure 1 A structural schematic diagram of a vehicle-to-vehicle charging device provided by the embodiments of the present application;

[0036] Figure 2 A flowchart of a vehicle-to-vehicle charging method provided by the embodiments of the present application;

[0037] Figure 3 A flowchart of another vehicle-to-vehicle charging method provided by the embodiments of the present application;

[0038] Figure 4 A structural schematic diagram of another vehicle-to-vehicle charging device provided by the embodiments of the present application;

[0039] Figure 5 A flowchart of another vehicle-to-vehicle charging method provided by the embodiments of the present application;

[0040] DETAILED DESCRIPTION

[0041] 100-vehicle-to-vehicle charging device; 200-power supply vehicle; 201-power supply device; 300-to-be-charged vehicle;

[0042] 10-signal receiver; 20-temperature detector; 30-controller; 40-current converter; 50-heating device; 60-alarm mechanism. DETAILED DESCRIPTION

[0043] The present application is described in detail below, examples of embodiments of the present application are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar components or components having the same or similar functions throughout. In addition, if a detailed description of the known art is unnecessary for the features of the present application shown, it is omitted. The embodiments described below by reference to the accompanying drawings are exemplary and are for the purpose of explaining the present application only, and cannot be interpreted as a limitation on the present application.

[0044] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have meanings consistent with those in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as such herein.

[0045] Those skilled in the art can understand that, unless otherwise stated, the singular forms "a", "an" and "the" used herein also include the plural forms. It should be further understood that the phrase "comprising" used in the specification of the present application means that the features, integers, steps, operations, elements and / or components exist, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we say an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there can be intermediate elements. In addition, "connected" or "coupled" used herein can include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any single unit and all combinations of the associated listed items.

[0046] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems are described in detail below with specific examples.

[0047] The present application provides a vehicle-to-vehicle charging device 100, which is arranged in a power supply vehicle and connected with a power supply device of the power supply vehicle. The structural diagram of the vehicle-to-vehicle charging device is shown in Figure 1 The vehicle-to-vehicle charging device 100 includes a signal receiver 10, a temperature detector 20, a controller 30 and a current converter 40.

[0048] The signal receiver 10 is configured to receive the to-be-charged state information sent by the to-be-charged vehicle 300; the temperature detector 20 is configured to detect temperature information of the power supply device 201 in the power supply vehicle 200; the controller 30 is electrically connected with the signal receiver 10 and the temperature detector 20, and is configured to determine a rated current output to the to-be-charged vehicle 300 according to the to-be-charged state information and the temperature information, and specifically includes: when detecting that the temperature of the power supply device 201 in the power supply vehicle 200 is less than a first temperature threshold, adjusting a duty cycle of a clock pulse signal to be not greater than a first duty cycle threshold; when the temperature of the power supply device 201 is greater than or equal to a second temperature threshold, adjusting the duty cycle of the clock pulse signal to be a rated duty cycle corresponding to the rated current, wherein the second temperature threshold is greater than the first temperature threshold; and the current converter 40 is electrically connected with the controller 30, and is configured to output a charging current corresponding to the clock pulse signal to charge the to-be-charged vehicle 300.

[0049] The vehicle-to-vehicle charging device provided by the embodiment of the present application can detect the temperature of the power supply device in the power supply vehicle, and the power supply vehicle can dynamically adjust the duty cycle of the clock pulse signal according to the temperature of the power supply device, so as to adjust the size of the charging current output by the power supply device, and realize adaptive adjustment of the discharging power of the power supply vehicle, thereby guaranteeing the safety of the power supply vehicle in charging the to-be-charged vehicle in a low-temperature environment, and reducing the probability of damage of components caused by discharging of the power supply vehicle in the low-temperature environment.

[0050] Specifically, the controller 30 includes a processor, which can be a CPU (Central Processing Unit, central processing unit), a general processor, a DSP (Digital Signal Processor, digital signal processor), an ASIC (Application Specific Integrated Circuit, application specific integrated circuit), an FPGA (Field-Programmable Gate Array, field programmable gate array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can realize or execute various exemplary logic blocks, modules and circuits described in combination with the disclosure. The processor can also be a combination of computing functions, such as one or more microprocessor combinations, DSP and microprocessor combinations, etc. In the embodiment of the present application, the control unit 10 is a TMS320F2812 type digital signal processor.

[0051] The temperature detector 20 includes two temperature sensors of B3950 type, one of which is arranged on the surface of the power supply device 201 in the power supply vehicle 200 to collect the temperature of the power supply device 201, and the other is arranged in the vehicle-to-vehicle charging device 100 to collect the temperature of the electrical elements in the vehicle-to-vehicle charging device 100. The temperature sensors transmit the collected temperature data to the controller 30 at a certain period.

[0052] Of course, the vehicle-to-vehicle charging device 100 provided by the embodiment of the present application can also include a memory for storing the voltage, temperature and other parameter data, fault data and historical records during the charging process of the vehicle-to-vehicle charging device 100. The memory can be a ROM (Read-Only Memory) or other type of static storage device that can store static information and instructions, a RAM (random access memory) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read-Only Memory) or other optical disk storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but not limited thereto.

[0053] In an embodiment of the present application, the vehicle-to-vehicle charging device 100 further includes a circulation pipeline (not shown in the figure) and a heating device 50 arranged on the circulation pipeline; the circulation pipeline is arranged on the power supply device 201, and the heating device 50 is used to heat the fluid in the circulation pipeline. The circulation pipeline can also be arranged on the vehicle-to-vehicle charging device 100, and the temperature of the vehicle-to-vehicle charging device 100 is increased by the heating device 50 to prevent the situation that, in a low-temperature environment, when the vehicle-to-vehicle charging device 100 is started, the equivalent series resistance value of the capacitor in the internal circuit of the vehicle-to-vehicle charging device 100 is too large due to low temperature, and the capacitor is prone to rapid heating and explosion under full load.

[0054] In the embodiment of the present application, the heating device 50 is electrically connected with the controller 30, and the controller 30 controls the opening and closing of the heating device 50. When the temperature detector 20 detects that the temperature of the power supply device 201 or the vehicle-to-vehicle charging device 100 is less than the first temperature threshold, the controller 30 controls the opening of the heating device 50 to increase the temperature of the power supply device 201 or the vehicle-to-vehicle charging device 100; when the temperature of the power supply device 201 or the vehicle-to-vehicle charging device 100 rises to be greater than the second temperature threshold, the controller 30 controls the closing of the heating device 50 to stop heating the power supply device 201 or the vehicle-to-vehicle charging device 100.

[0055] In an embodiment of the present application, the vehicle-to-vehicle charging device 100 further comprises an alarm mechanism 60, the alarm mechanism 60 is electrically connected with the controller 30, and the alarm mechanism 60 is used to send warning information when the power supply vehicle 200 is in the first fault state or the second fault state.

[0056] It should be noted that, in the embodiment of the present application, the first fault state specifically refers to a fault that the temperature of the power supply device 201 or the vehicle-to-vehicle charging device 100 is greater than the maximum working temperature and less than the minimum working temperature; and the second fault state specifically refers to a fault that the signal receiver 10, the temperature detector 20, the controller 30 or the current converter 4 in the power supply device 201 or the vehicle-to-vehicle charging device 100 cannot work normally.

[0057] Figure 2 A flowchart of a vehicle-to-vehicle charging method provided in the embodiment of the present application is shown. In combination with the vehicle-to-vehicle charging device 100 shown in FIG. 1, the method is applied to the power supply vehicle 200, and the main steps are as follows. Figure 2 It can be seen that the method is applied to the power supply vehicle, and includes the following main steps:

[0058] S201, when a charging gun connection signal is detected, receiving the to-be-charged state information sent by the to-be-charged vehicle.

[0059] Optionally, when the charging gun connection signal to the power supply vehicle 200 is detected, the signal receiver 10 of the vehicle-to-vehicle charging device 100 receives the to-be-charged state information sent by the to-be-charged vehicle 300. The to-be-charged state information includes the battery capacity information and the battery rated voltage of the to-be-charged vehicle 300.

[0060] S202, determining the rated current output to the to-be-charged vehicle according to the to-be-charged state information.

[0061] Optionally, the vehicle-to-vehicle charging device 100 determines the rated current output to the vehicle to be charged 300 according to the information of the battery capacity of the power supply device 201 of the power supply vehicle 200 and the information of the state to be charged sent by the vehicle to be charged 300. Here, the rated current refers to the maximum charging current output from the power supply device 201 of the power supply vehicle 200 to the vehicle to be charged 300.

[0062] S203, when the temperature of the power supply device in the power supply vehicle is detected to be less than the first temperature threshold, the duty cycle of the clock pulse signal is adjusted to be not greater than the first duty cycle threshold; when the temperature of the power supply device is greater than or equal to the second temperature threshold, the duty cycle of the clock pulse signal is adjusted to the rated duty cycle corresponding to the rated current; the second temperature threshold is greater than the first temperature threshold.

[0063] Optionally, when the temperature detector 20 of the vehicle-to-vehicle charging device 100 detects that the temperature of the power supply device 201 in the power supply vehicle 200 is less than the first temperature threshold, the controller 30 adjusts the duty cycle of the clock pulse signal to be not greater than the first duty cycle threshold. When the temperature detector 20 of the vehicle-to-vehicle charging device 100 detects that the temperature of the power supply device 201 is greater than or equal to the second temperature threshold, the controller 30 adjusts the duty cycle of the clock pulse signal to the rated duty cycle corresponding to the rated current.

[0064] Of course, the vehicle-to-vehicle charging device 100 can also adjust the duty cycle of the clock pulse signal according to the temperature of the vehicle-to-vehicle charging device 100. Specifically, when the temperature detector 20 detects that the temperature of the vehicle-to-vehicle charging device 100 is less than the first temperature threshold, the controller 30 adjusts the duty cycle of the clock pulse signal to be not greater than the first duty cycle threshold. When the temperature detector 20 detects that the temperature of the vehicle-to-vehicle charging device 100 is greater than or equal to the second temperature threshold, the controller 30 adjusts the duty cycle of the clock pulse signal to the rated duty cycle corresponding to the rated current.

[0065] It should be noted that the first temperature threshold is the minimum temperature at which the power supply device 201 or the vehicle-to-vehicle charging device 100 can work; the second temperature threshold is the minimum temperature of the optimal working temperature interval at which the power supply device 201 or the vehicle-to-vehicle charging device 100 maintains the optimal working state; the first duty cycle threshold D is 3%, and when the duty cycle of the clock pulse signal is less than 3%, the power supply device 201 cannot charge the vehicle to be charged 300.

[0066] S204, output the charging current corresponding to the clock pulse signal to charge the vehicle to be charged.

[0067] Optionally, the vehicle-to-vehicle charging device 100 controls the power supply device 201 of the power supply vehicle 200 to output a charging current corresponding to the clock pulse signal, and charges the vehicle to be charged 300. Specifically, the vehicle-to-vehicle charging device 100 controls the power supply device 201 of the power supply vehicle 200 to output a charging current corresponding to the clock pulse signal through the current converter 40, and charges the vehicle to be charged 300.

[0068] The vehicle-to-vehicle charging method provided by the embodiment of the application can detect the temperature of the power supply device in the power supply vehicle, and the power supply vehicle can dynamically adjust the duty cycle of the clock pulse signal according to the temperature of the power supply device, so as to adjust the size of the charging current output by the power supply device, and realize adaptive adjustment of the discharging power of the power supply vehicle, thereby guaranteeing the safety of the power supply vehicle in charging the vehicle to be charged in a low-temperature environment, and reducing the probability of damage of components caused by discharging of the power supply vehicle in a low-temperature environment.

[0069] As shown in FIG. 1, it is a flow diagram of an example of a vehicle-to-vehicle charging method provided by an embodiment of the application. The example provides a possible implementation manner of the vehicle-to-vehicle charging method provided by the embodiment of the application, and includes the following steps: Figure 3

[0070] S301, when the vehicle-to-vehicle charging device detects a connection signal of the charging gun to the power supply vehicle, the signal receiver receives the charging state information sent by the vehicle to be charged.

[0071] Specifically, after the signal receiver 10 receives the charging state information sent by the vehicle to be charged 300, the signal receiver 10 sends the charging state information to the controller 30.

[0072] S302, the controller of the vehicle-to-vehicle charging device determines the rated current output to the vehicle to be charged according to the charging state information.

[0073] The vehicle-to-vehicle charging device 100 analyzes the battery capacity information and other information of the power supply device 201 of the power supply vehicle 200 according to the charging state information sent by the vehicle to be charged 300, and determines the rated current output to the vehicle to be charged 300. Here, the rated current refers to the maximum charging current output by the power supply device 201 of the power supply vehicle 200 to the vehicle to be charged 300.

[0074] S303, the controller of the vehicle-to-vehicle charging device compares the temperature of the power supply device in the power supply vehicle detected by the temperature detector with the first temperature threshold and the second temperature threshold, and then executes steps S304, S305 or S306.

[0075] ​The controller 30 of the vehicle-to-vehicle charging device 100 compares the temperature of the power supply device 201 in the power supply vehicle 200 detected by the temperature detector 20 with the first temperature threshold value and the second temperature threshold value. The temperature detector 20 periodically transmits the detected temperature information of the power supply device 201 to the controller 30, and the transmission period can be adjusted according to actual conditions.

[0076] S304, when the temperature detector of the vehicle-to-vehicle charging device detects that the temperature of the power supply device in the power supply vehicle is less than the first temperature threshold value, the controller adjusts the duty cycle of the clock pulse signal to be not greater than the first duty cycle threshold value, and controls the heating device to heat the power supply device until the temperature of the power supply device is greater than or equal to the second temperature threshold value.

[0077] Specifically, if the temperature of the power supply device 201 is less than the first temperature threshold value, it indicates that the power supply device 201 cannot work normally, at this time, the power supply device 201 cannot charge the vehicle to be charged 300. By heating the power supply device 201 by the heating device 50, until the temperature of the power supply device 201 is greater than or equal to the second temperature threshold value, prevent the power supply device 201 from not working normally in low temperature environment.

[0078] Alternatively, when the temperature detector 20 detects that the temperature of the vehicle-to-vehicle charging device 100 is less than the first temperature threshold value, at this time, it indicates that the vehicle-to-vehicle charging device 100 cannot work normally, the controller 30 adjusts the duty cycle of the clock pulse signal to be not greater than the first duty cycle threshold value. By heating the vehicle-to-vehicle charging device 100 by the heating device 50, until the temperature of the vehicle-to-vehicle charging device 1001 is greater than or equal to the second temperature threshold value, prevent the vehicle-to-vehicle charging device 100 from not working normally in low temperature environment.

[0079] S305, when the temperature detector of the vehicle-to-vehicle charging device detects that the temperature of the power supply device in the power supply vehicle is greater than or equal to the second temperature threshold value, the controller adjusts the duty cycle of the clock pulse signal to be the rated duty cycle corresponding to the rated current, and then executes step S307.

[0080] When the temperature detector 20 of the vehicle-to-vehicle charging device 100 detects that the temperature of the power supply device 201 is greater than or equal to the second temperature threshold value, the controller 30 adjusts the duty cycle of the clock pulse signal to be the rated duty cycle corresponding to the rated current.

[0081] S306, when the temperature detector of the vehicle-to-vehicle charging device detects that the temperature of the power supply device in the power supply vehicle is greater than or equal to the first temperature threshold value, and less than the second temperature threshold value, the controller adjusts the duty cycle of the clock pulse signal to be greater than or equal to the first duty cycle threshold value, and less than the second duty cycle threshold value, until the temperature of the power supply device is greater than or equal to the second temperature threshold value.

[0082] Specifically, when the temperature detector 20 detects that the temperature of the power supply device 201 is greater than or equal to the first temperature threshold and less than the second temperature threshold, at this time, it indicates that the power supply device 201 can be normally started, but cannot be kept in the best working state, at this time, the controller 30 adjusts the duty cycle of the clock pulse signal to be greater than or equal to the first duty cycle threshold and less than the second duty cycle threshold, and the heat generated by the working of the related circuit of the power supply device 201 gradually makes the temperature of the power supply device 201 greater than or equal to the second temperature threshold.

[0083] Optionally, when the temperature detector 20 detects that the temperature of the vehicle-to-vehicle charging device 100 is greater than or equal to the first temperature threshold and less than the second temperature threshold, at this time, it indicates that the vehicle-to-vehicle charging device 100 can be normally started, but cannot be kept in the best working state, at this time, the controller 30 adjusts the duty cycle of the clock pulse signal to be greater than or equal to the first duty cycle threshold and less than the second duty cycle threshold, and the heat generated by the working of the related circuit of the vehicle-to-vehicle charging device 100 gradually makes the temperature of the vehicle-to-vehicle charging device 100 greater than or equal to the second temperature threshold.

[0084] It should be noted that in the embodiment, the second duty cycle threshold is 10%, when the duty cycle of the clock pulse signal is greater than or equal to 3% and less than 10%, the vehicle-to-vehicle charging device 100 controls the power supply device 201 to output the charging current corresponding to the clock pulse signal through the current converter 40 to charge the vehicle to be charged 300, at this time, the maximum charging current corresponding to the clock pulse signal does not exceed 6A.

[0085] S307, the controller controls the duty cycle of the clock pulse signal to increase by a fixed step to the rated duty cycle within a predetermined time, and the controller controls the current converter to output the rated charging current corresponding to the clock pulse signal with the rated duty cycle.

[0086] When the temperature of the power supply device 201 rises to be greater than or equal to the second temperature threshold, the controller 30 controls the duty cycle of the clock pulse signal to increase by a fixed step to the rated duty cycle within a predetermined time. In the embodiment of the application, the duty cycle of the clock pulse signal is increased by 1% step to the rated duty cycle within 10S, to prevent the duty cycle from rising sharply and causing overload.

[0087] It should be noted that in order to further improve the safety during charging, if the vehicle-to-vehicle charging device 100 detects that the power supply device 201 of the power supply vehicle 200 is in the first fault state during charging, the controller 30 adjusts the duty cycle of the clock pulse signal to the first fault duty cycle, and adjusts the charging current output by the current converter 40 according to the first fault duty cycle.

[0088] If the vehicle-to-vehicle charging device 100 detects that the power supply device 201 of the power supply vehicle 200 is in the second fault state, the controller 30 adjusts the duty cycle of the clock pulse signal to the first duty cycle threshold. That is, the power supply device 201 of the power supply vehicle 200 stops the charging process of the to-be-charged vehicle 300.

[0089] During the charging process, when the controller 30 receives the information transmitted by the signal receiver 10, the temperature detector 20, the current converter 40, and the heating device 50 and determines that the power supply device 201 is in the first fault state or the second fault state, the controller 30 controls the alarm mechanism 60 to output the warning information of the audible and visual alarm indication to remind the user to handle in time.

[0090] Based on the same inventive concept, the embodiment of the present application provides a vehicle-to-vehicle charging device applied to a to-be-charged vehicle, as shown in the accompanying drawings, which comprises: Figure 4 As shown in the accompanying drawings, the vehicle-to-vehicle charging device comprises:

[0091] The signal transmitter 70 is configured to transmit to-be-charged state information to the power supply vehicle.

[0092] The processor 80 is in communication connection with the signal transmitter 70 and is configured to control the to-be-charged vehicle to enter a charging mode and receive a charging current from the power supply vehicle.

[0093] Based on the same inventive concept, the embodiment of the present application provides a vehicle-to-vehicle charging method applied to a to-be-charged vehicle, as shown in the accompanying drawings, which comprises the following main steps: Figure 5 As shown in the accompanying drawings, the vehicle-to-vehicle charging method comprises the following main steps:

[0094] S401, after detecting a charging gun connection signal, transmitting to-be-charged state information to the power supply vehicle and controlling the to-be-charged vehicle to enter a charging mode; so that the power supply vehicle determines a rated current output to the to-be-charged vehicle according to the to-be-charged state information; when detecting that the temperature of the power supply device in the power supply vehicle is less than a first temperature threshold, adjusting the duty cycle of the clock pulse signal to be not greater than a first duty cycle threshold; when the temperature of the power supply device is greater than or equal to a second temperature threshold, adjusting the duty cycle of the clock pulse signal to be a rated duty cycle corresponding to the rated current; the second temperature threshold is greater than the first temperature threshold; and outputting a charging current corresponding to the clock pulse signal.

[0095] Optionally, the vehicle-to-vehicle charging device sends the to-be-charged vehicle 300's to-be-charged state information to the power supply vehicle 200 when detecting the connection signal of the charging gun to the to-be-charged vehicle 300. The to-be-charged state information includes the battery capacity information and the battery rated voltage of the to-be-charged vehicle 300. Thus, the signal receiver 10 receives the to-be-charged state information sent by the to-be-charged vehicle 300, and determines the rated current output to the to-be-charged vehicle 300 according to the battery capacity information and other information of the power supply device 201 of the power supply vehicle 200. Here, the rated current refers to the maximum charging current output by the power supply device 201 of the power supply vehicle 200 to the to-be-charged vehicle 300.

[0096] When the temperature detector 20 of the vehicle-to-vehicle charging device 100 detects that the temperature of the power supply device 201 in the power supply vehicle 200 is less than the first temperature threshold, the controller 30 adjusts the duty cycle of the clock pulse signal to be not greater than the first duty cycle threshold. When the temperature detector 20 of the vehicle-to-vehicle charging device 100 detects that the temperature of the power supply device 201 is greater than or equal to the second temperature threshold, the controller 30 adjusts the duty cycle of the clock pulse signal to the rated duty cycle corresponding to the rated current.

[0097] Of course, the vehicle-to-vehicle charging device 100 can also adjust the duty cycle of the clock pulse signal according to the temperature of the vehicle-to-vehicle charging device 100. Specifically, when the temperature detector 20 detects that the temperature of the vehicle-to-vehicle charging device 100 is less than the first temperature threshold, the controller 30 adjusts the duty cycle of the clock pulse signal to be not greater than the first duty cycle threshold. When the temperature detector 20 detects that the temperature of the vehicle-to-vehicle charging device 100 is greater than or equal to the second temperature threshold, the controller 30 adjusts the duty cycle of the clock pulse signal to the rated duty cycle corresponding to the rated current.

[0098] S402, in the charging mode, receiving the charging current originating from the power supply vehicle.

[0099] The processor 80 controls the to-be-charged vehicle 300 to enter the charging mode, and receives the charging current corresponding to the clock pulse signal output by the power supply device 201 of the power supply vehicle 200.

[0100] By applying the embodiments of the present application, the following beneficial effects can be achieved:

[0101] The vehicle-to-vehicle charging method and device provided by the embodiment of the present application can dynamically adjust the duty cycle of the clock pulse signal according to the temperature of the power supply device in the power supply vehicle, thereby adjusting the size of the charging current output by the power supply device, realizing adaptive adjustment of the discharging power of the power supply vehicle, and guaranteeing the safety of the power supply vehicle in charging the vehicle to be charged in a low-temperature environment, and reducing the probability of damage to components caused by discharging of the power supply vehicle in a low-temperature environment.

[0102] Those skilled in the art can understand that the steps, measures and schemes in the various operations, methods and processes discussed in the present application can be alternated, changed, combined or deleted. Further, other steps, measures and schemes in the various operations, methods and processes discussed in the present application can also be alternated, changed, rearranged, decomposed, combined or deleted. Further, the steps, measures and schemes in the various operations, methods and processes in the prior art can also be alternated, changed, rearranged, decomposed, combined or deleted.

[0103] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0104] It should be understood that although each step in the flowchart of the accompanying drawings is displayed in sequence according to the direction of the arrow, these steps are not necessarily executed in sequence according to the direction of the arrow. Unless otherwise specified in this document, the execution of these steps is not strictly limited in sequence, and they can be executed in other sequences. Moreover, at least part of the steps in the flowchart of the accompanying drawings can include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence is not necessarily sequential, but can be alternately or alternately executed with at least part of other steps or sub-steps or stages of other steps.

[0105] The above only describes some embodiments of the present application, and it should be pointed out that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be regarded as the protection scope of the present application.

Claims

1. A vehicle-to-vehicle charging method, applied to a power supply vehicle, characterized in that, Includes the following steps: When a charging gun connection signal is detected, the charging status information sent by the vehicle to be charged is received. Based on the charging status information, determine the rated current to be output to the vehicle to be charged; When the temperature of the power supply equipment in the power supply vehicle is detected to be lower than the first temperature threshold, the duty cycle of the clock pulse signal is adjusted to be no greater than the first duty cycle threshold. When the temperature of the power supply equipment is greater than or equal to the second temperature threshold, the duty cycle of the clock pulse signal is adjusted to the rated duty cycle corresponding to the rated current. The second temperature threshold is greater than the first temperature threshold, where the first temperature threshold is the lowest temperature at which the power supply equipment can operate, and the second temperature threshold is the lowest temperature in the optimal operating temperature range for the power supply equipment to maintain its optimal operating state. The system outputs a charging current corresponding to the clock pulse signal to charge the vehicle to be charged.

2. The vehicle-to-vehicle charging method according to claim 1, characterized in that, When the temperature of the power supply equipment in the power supply vehicle is detected to be lower than a first temperature threshold, the method further includes: The power supply equipment is heated until its temperature is greater than or equal to the second temperature threshold.

3. The vehicle-to-vehicle charging method according to claim 1, characterized in that, Also includes: When the temperature of the power supply equipment in the power supply vehicle is detected to be greater than or equal to the first temperature threshold and less than the second temperature threshold, the duty cycle of the clock pulse signal is adjusted to be greater than or equal to the first duty cycle threshold and less than the second duty cycle threshold.

4. The vehicle-to-vehicle charging method according to claim 1, characterized in that, When the temperature of the power supply equipment exceeds the second temperature threshold, adjusting the duty cycle of the clock pulse signal to the rated duty cycle corresponding to the rated current includes: The duty cycle of the clock pulse signal increases to the rated duty cycle in fixed steps within a predetermined time.

5. The vehicle-to-vehicle charging method according to claim 1, characterized in that, When the power supply vehicle is detected to be in a first fault state, the duty cycle of the clock pulse signal is adjusted to the first fault duty cycle; The output charging current is adjusted according to the duty cycle of the first fault.

6. The vehicle-to-vehicle charging method according to claim 1, characterized in that, When the power supply vehicle is detected to be in a second fault state, the duty cycle of the clock pulse signal is adjusted to the first duty cycle threshold.

7. A vehicle-to-vehicle charging device, applied to a power supply vehicle, characterized in that, include: A signal receiver is used to receive charging status information sent by the vehicle to be charged. Temperature detectors are used to detect the temperature information of power supply equipment in power supply vehicles; The controller, electrically connected to the signal receiver and the temperature detector, is used to determine the rated current output to the vehicle to be charged based on the charging status information and the temperature information. Specifically, it includes: when the temperature of the power supply equipment in the vehicle is detected to be lower than a first temperature threshold, adjusting the duty cycle of the clock pulse signal to be no greater than the first duty cycle threshold; when the temperature of the power supply equipment is greater than or equal to a second temperature threshold, adjusting the duty cycle of the clock pulse signal to the rated duty cycle corresponding to the rated current, wherein the second temperature threshold is greater than the first temperature threshold, the first temperature threshold is the lowest temperature at which the power supply equipment can operate, and the second temperature threshold is the lowest temperature in the optimal operating temperature range for the power supply equipment to maintain its optimal operating state. A current converter, electrically connected to the controller, is used to output a charging current corresponding to the clock pulse signal to charge the vehicle to be charged.

8. The vehicle-to-vehicle charging device according to claim 7, characterized in that, Also includes: A circulation pipeline and a heating device installed on the circulation pipeline; The circulation pipeline is installed on the power supply equipment, and the heating device is used to heat the fluid in the circulation pipeline.

9. The vehicle-to-vehicle charging device according to claim 7, characterized in that, Also includes: An alarm mechanism is electrically connected to the controller. When the power supply vehicle is in a first fault state or a second fault state, the alarm mechanism is used to issue a warning message.

10. A vehicle-to-vehicle charging method, applied to a vehicle to be charged, characterized in that, Includes the following steps: After detecting the charging gun connection signal, the system sends a charging status information to the power supply vehicle and controls it to enter the charging mode; the power supply vehicle determines the rated current to be output to the vehicle to be charged based on the charging status information; when the temperature of the power supply equipment in the power supply vehicle is detected to be lower than the first temperature threshold, the duty cycle of the clock pulse signal is adjusted to be no greater than the first duty cycle threshold. When the temperature of the power supply equipment is greater than or equal to the second temperature threshold, the duty cycle of the clock pulse signal is adjusted to the rated duty cycle corresponding to the rated current. The second temperature threshold is greater than the first temperature threshold, where the first temperature threshold is the lowest temperature at which the power supply equipment can operate, and the second temperature threshold is the lowest temperature in the optimal operating temperature range for the power supply equipment to maintain its optimal operating state. Output the charging current corresponding to the clock pulse signal; In the charging mode, the charging current originating from the power supply vehicle is received.

11. A vehicle-to-vehicle charging device for performing the vehicle-to-vehicle charging method of claim 10, applied to a vehicle to be charged, characterized in that, The vehicle charging device is installed inside the power supply vehicle and connected to the power supply equipment of the power supply vehicle. The vehicle charging device includes: A signal transmitter used to send charging status information to the power supply vehicle; The processor, which is communicatively connected to the signal transmitter, is used to control the vehicle to be charged to enter the charging mode and to receive the charging current from the power supply vehicle.

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