Charging and discharging connection device, assembly, method, system and storage medium or product

Abstract

The application provides a charging and discharging connection device, assembly, method, system and storage medium or product, relates to the technical field of charging and discharging, and the control guide unit is connected to the charging and discharging port of a discharging vehicle and the control guide port of a charging vehicle, the first voltage collector is connected to the charging and discharging port of the discharging vehicle and / or the charging and discharging port of the charging vehicle, the charging voltage value is collected through the first voltage collector, and the first control guide signal of the charging vehicle is generated through the control guide unit. Since the first control guide signal can be adjusted according to the charging voltage value, the discharging current value of the discharging vehicle can be adjusted by adjusting the first control guide signal, so that the problem that the discharging current value of the discharging vehicle is too large or too small is avoided, the problem that the discharging current value is too large to trigger the overcurrent protection of the discharging vehicle and interrupt the discharging is avoided, and the problem that the discharging efficiency of the discharging vehicle is low due to the too small discharging current value, so that the charging time of the charging vehicle is long.

Description

Technical Field

[0001] This application relates to the field of charge and discharge technology, and in particular to a charge and discharge connection device, component, method, system, and storage medium or product. Background Technology

[0002] In related technologies, charging of a vehicle is achieved by discharging a vehicle to a charging vehicle.

[0003] However, when a discharging vehicle discharges to a charging vehicle, if the discharge current of the discharging vehicle is too large or too small, the discharge current will trigger the overcurrent protection of the discharging vehicle and interrupt the discharge. If the discharge current is too small, the discharge efficiency of the discharging vehicle will be low, resulting in a long charging time for the charging vehicle. Summary of the Invention

[0004] This application provides a charging and discharging connection device, component, method, system, and storage medium or product to solve the problems in the related art where, when a discharging vehicle discharges to a charging vehicle, the discharge current value of the discharging vehicle is too large or too small. If the discharge current value is too large, it triggers the overcurrent protection of the discharging vehicle and interrupts the discharge, while if the discharge current value is too small, it results in low discharge efficiency of the discharging vehicle and long charging time for the charging vehicle.

[0005] In a first aspect, embodiments of this application provide a charging / discharging connection device for connecting a discharging vehicle and a charging vehicle, comprising:

[0006] A control guidance unit, the control guidance unit being adapted to connect the charging / discharging port of the discharging vehicle and the control guidance port of the charging vehicle;

[0007] A first voltage acquisition device is adapted to be connected to the charging / discharging port of the discharging vehicle and / or the charging / discharging port of the charging vehicle, and the first voltage acquisition device is used to acquire the charging voltage value.

[0008] The control guidance unit is used to generate a first control guidance signal for the charging vehicle, which can be adjusted according to the charging voltage value.

[0009] Optionally, the control guidance unit includes: a pulse width modulation generator, a first end of which is adapted to be connected to the charging / discharging port of the discharging vehicle, and a second end of which is adapted to be connected to the control guidance port of the charging vehicle; the pulse width modulation generator is used to generate a first control guidance signal in PWM form, the duty cycle of which can be adjusted according to the charging voltage value.

[0010] Optionally, the control guidance unit further includes a voltage converter, which is used to convert the first voltage signal output by the discharging vehicle into a second voltage signal as a second control guidance signal for the charging vehicle.

[0011] Optionally, the first end of the voltage converter is adapted to connect to the charging / discharging port of the discharging vehicle, and the second end of the voltage converter is adapted to connect to the first end of the pulse width modulation generator.

[0012] Optionally, the charging and discharging connection device further includes: a second voltage acquisition unit for acquiring the voltage value of the second control guidance signal; the control guidance unit is configured to generate the first control guidance signal when the voltage value of the second control guidance signal reaches a preset voltage value.

[0013] Optionally, the first end of the second voltage acquisition device is adapted to connect to the PE port of the discharge vehicle, and the second end of the second voltage acquisition device is adapted to connect to the control guidance port of the discharge vehicle.

[0014] Optionally, the charging and discharging connection device further includes: a first switching device, a first end of which is adapted to connect to the PE port of the discharging vehicle, and a second end of which is connected to the first end of the second voltage acquisition device.

[0015] Optionally, the charging and discharging connection device further includes: a second switching device, the first end of which is adapted to be electrically connected to the first power supply terminal of the discharging vehicle, and the second end of which is adapted to be electrically connected to the first power supply terminal of the charging vehicle; and a third switching device, the first end of which is adapted to be electrically connected to the second power supply terminal of the discharging vehicle, and the second end of which is adapted to be electrically connected to the second power supply terminal of the charging vehicle.

[0016] Optionally, the charging and discharging connection device further includes: a third voltage collector, the first end of which is electrically connected to the first end of the second switching device, the second end of which is electrically connected to the second end of the second switching device, the third end of which is electrically connected to the first end of the third switching device, and the fourth end of which is electrically connected to the second end of the third switching device.

[0017] Optionally, the charging and discharging connection device further includes a controller, which is electrically connected to the control guidance unit, and is used to adjust the first control guidance signal according to the charging voltage value.

[0018] Optionally, the charging / discharging connection device further includes: a fourth switching device, the first end of which is electrically connected to the connection confirmation terminal of the discharging vehicle, and the second end of which is electrically connected to the first end of the first resistor; a first resistor, the second end of which is electrically connected to the first end of the second resistor; a second resistor, the second end of which is electrically connected to the PE port of the discharging vehicle and the PE port of the charging vehicle, respectively; and a third resistor, the first end of which is electrically connected to the connection confirmation terminal of the discharging vehicle, and the second end of which is electrically connected to the first end of the first resistor.

[0019] Optionally, the charging and discharging connection device further includes: a fourth resistor, the first end of which is electrically connected to the PE port of the discharging vehicle and the PE port of the charging vehicle, respectively, and the second end of which is electrically connected to the connection confirmation terminal of the charging vehicle.

[0020] Secondly, embodiments of this application also provide a charge-discharge connection assembly, comprising:

[0021] Discharge gun head, used for connection to the discharge vehicle;

[0022] The charge-discharge connection device as described in the first aspect is connected to the discharge gun head.

[0023] Optionally, the charging and discharging connection assembly further includes: a charging gun head for connecting to a charging vehicle; the charging gun head is connected to the charging and discharging connection device.

[0024] Thirdly, embodiments of this application also provide a charging and discharging system, including:

[0025] Charging vehicles and discharging vehicles;

[0026] The charge / discharge connection assembly as described in the second aspect.

[0027] Fourthly, embodiments of this application also provide a charge / discharge connection control method, applied to the charge / discharge connection device described in the first aspect, comprising:

[0028] Generate the first control guidance signal for the charging vehicle;

[0029] The first control guidance signal is adjusted according to the charging voltage value.

[0030] Optionally, the first control guidance signal is a PWM signal, and adjusting the first control guidance signal according to the charging voltage value includes: increasing the duty cycle of the first control guidance signal to increase the discharge current value of the discharge vehicle (40) when the charging voltage value is greater than the voltage threshold.

[0031] Optionally, increasing the duty cycle of the first control guidance signal to increase the discharge current of the discharge vehicle (40) when the charging voltage value is greater than the voltage threshold includes: acquiring the charging voltage value in each cycle; increasing the duty cycle of the first control guidance signal of the first cycle by a first preset value when the charging voltage value of the first cycle is greater than the voltage threshold; adjusting the duty cycle of the first control guidance signal of the second cycle to the duty cycle of the first control guidance signal of the first cycle when the charging voltage value of the second cycle is less than or equal to the voltage threshold; the second cycle is later than the first cycle.

[0032] Optionally, the first control guidance signal is a PWM signal, and adjusting the first control guidance signal according to the charging voltage value includes: when the charging voltage value is less than or equal to the voltage threshold, reducing the duty cycle of the first control guidance signal to reduce the discharge current value.

[0033] Optionally, the step of reducing the duty cycle of the first control guidance signal to reduce the discharge current value when the charging voltage value is less than or equal to the voltage threshold includes: acquiring the charging voltage value in each cycle; reducing the duty cycle of the first control guidance signal in the first cycle by a second preset value when the charging voltage value in the first cycle is less than or equal to the voltage threshold; maintaining the duty cycle of the first control guidance signal in the second cycle when the charging voltage value in the second cycle is greater than the voltage threshold; the second cycle is later than the first cycle.

[0034] Optionally, the method further includes: obtaining the usage frequency of the duty cycle selected by the discharging vehicle (40) to discharge to the charging vehicle (50) in multiple historical periods; and determining the duty cycle with the highest usage frequency as the initial duty cycle.

[0035] Fifthly, embodiments of this application also provide a storage medium or program product, the program or instructions being used to implement the charge / discharge connection control method as described in the fourth aspect.

[0036] In summary, in this embodiment, a control guidance unit is connected to the charging / discharging port of the discharging vehicle and the control guidance port of the charging vehicle. A first voltage acquisition unit is connected to the charging / discharging port of the discharging vehicle and / or the charging / discharging port of the charging vehicle. The first voltage acquisition unit acquires the charging voltage value, and the control guidance unit generates a first control guidance signal for the charging vehicle. Since the first control guidance signal can be adjusted according to the charging voltage value, when the discharging vehicle discharges to the charging vehicle, the discharge current value of the discharging vehicle can be adjusted by adjusting the first control guidance signal of the charging vehicle. This avoids the discharge current value of the discharging vehicle being too large or too small, thereby avoiding the problem of the discharge current value being too large triggering the overcurrent protection of the discharging vehicle and interrupting the discharge, and the discharge current value being too small resulting in low discharge efficiency of the discharging vehicle and long charging time of the charging vehicle.

[0037] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0039] Figure 1 This is a schematic diagram of the structure of a charge-discharge connection assembly provided in an embodiment of this application;

[0040] Figure 2 This is a schematic diagram of a specific structure of a charge-discharge connection assembly provided in an embodiment of this application;

[0041] Figure 3 This is a schematic diagram of another charge-discharge connection assembly provided in an embodiment of this application;

[0042] Figure 4 This is a schematic diagram of another charging and discharging connection assembly provided in an embodiment of this application;

[0043] Figure 5 A schematic diagram illustrating the charging and discharging process of a charging and discharging connection assembly provided in an embodiment of this application;

[0044] Figure 6 A schematic diagram of the charging and discharging process of another charging and discharging connection component provided in an embodiment of this application;

[0045] Figure 7 This is a flowchart illustrating the steps of a charge / discharge connection control method provided in an embodiment of this application.

[0046] Figure label:

[0047] 10-Charging / discharging connection device; 11-Controller; 12-Control guidance unit; 121-Pulse width modulation generator; 122-Voltage converter; 13-First voltage acquisition unit; 14-Second voltage acquisition unit; 15-Third voltage acquisition unit; 20-Discharge gun head; 201-First power supply terminal of discharge gun head; 202-Second power supply terminal of discharge gun head; 203-Control guidance function terminal of discharge gun head; 204-Grounding terminal of discharge gun head; 205-Connection confirmation terminal of discharge gun head; 30-Charging gun head; 30 1-First power supply terminal of the charging gun head; 302-Second power supply terminal of the charging gun head; 303-Control and guidance function terminal of the charging gun head; 304-Grounding terminal of the charging gun head; 305-Second power supply terminal of the charging gun head; 40-Discharging vehicle; 50-Charging vehicle; 60-Integrated device; K1-First switching device; K2-Second switching device; K3-Third switching device; K4-Fourth switching device; K5-Fifth switching device; R1-First resistor; R2-Second resistor; R3-Third resistor; R4-Fourth resistor. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0050] Reference Figure 1This application provides a charge / discharge connection assembly, including: a discharge gun head 20, a charging gun head 30, and a charge / discharge connection device 10; the discharge gun head 20 is electrically connected to a discharge vehicle 40; the charging gun head 30 is electrically connected to a charging vehicle 50; the charge / discharge connection device 10 is electrically connected to the charging gun head 30 and the discharge gun head 20 respectively, and the charge / discharge connection device 10 is used to generate a first control guidance function signal for the charging vehicle 50, and to collect the charging voltage value of the charging vehicle 50; and when the charging voltage value is greater than a voltage threshold, to increase the current duty cycle of the first control guidance function signal to increase the discharge current value of the discharge vehicle 40; and when the charging voltage value is less than or equal to the voltage threshold, to decrease the current duty cycle to decrease the discharge current value; wherein the charging voltage value and the discharge current value are negatively correlated.

[0051] It should be noted that the discharge vehicle 40 is a vehicle that discharges to the outside, and the charging vehicle 50 is a vehicle that needs to be charged. The discharge vehicle 40 is connected to the charging vehicle 50 through the charging and discharging connection assembly and charges the charging vehicle 50. Specifically, the battery pack in the discharge vehicle 40 discharges to the outside through the charging and discharging connection assembly and charges the battery pack in the charging vehicle 50.

[0052] The charging voltage of the charging vehicle 50 is the voltage of the charging gun head 30, and the discharge current is the current of the discharging vehicle 40 charging the charging vehicle 50. Since the discharge power is the product of the charging voltage and the discharge current, the charging voltage and the discharge current are negatively correlated when the discharge power is fixed. The discharge power is the power of the battery pack of the discharging vehicle 40 to discharge to the outside, which represents the ability of the battery pack of the discharging vehicle 40 to discharge to the outside.

[0053] The control pilot function (CP) signal in the form of pulse width modulation (PWM) provided to the charging vehicle reflects the magnitude of the discharge current value of the discharging vehicle. The duty cycle of the PWM CP signal is positively correlated with the discharge current value.

[0054] The voltage threshold is the voltage value obtained by dividing the discharge power by the maximum allowable discharge current value of the discharge vehicle 40. If the charging voltage value is greater than the voltage threshold, it indicates that the discharge current value is too small, that is, the discharge current value is less than the maximum allowable discharge current value of the discharge vehicle 40, and the difference between the discharge current value and the maximum allowable discharge current value of the discharge vehicle 40 is too large. The difference between the discharge current value and the maximum allowable discharge current value of the discharge vehicle 40 being too large means that the discharge current value is less than the preset minimum discharge current value of the discharge vehicle 40. If the discharge current value is less than the preset minimum discharge current value of the discharge vehicle 40, it is determined that the discharge efficiency of the discharge vehicle 40 is low, that is, the charging efficiency of the discharge vehicle 40 to the charging vehicle 50 is low.

[0055] If the charging voltage is less than or equal to the voltage threshold, it indicates that the discharge current is too large, that is, the discharge current is greater than the maximum allowable discharge current of the discharge vehicle 40, causing the discharge vehicle 40 to restart its external discharge and interrupt the charging of the charging vehicle 50. If the number of restarts of the discharge vehicle 40 exceeds the number threshold, the discharge vehicle 40 shuts off its external discharge and stops charging the charging vehicle 50.

[0056] In some embodiments, the discharge gun head 20 is specifically used to connect to the charging and discharging interface of the discharge vehicle 40, and the charging gun head 30 is specifically used to connect to the charging and discharging interface of the charging vehicle 50.

[0057] In some embodiments, when the charging and discharging connection component is fault-free, the charging and discharging connection device 10 generates a first control guidance function signal for the charging vehicle 50 and outputs it to the charging vehicle 50.

[0058] In some embodiments, the discharge vehicle 40 uses alternating current to charge the charging vehicle 50 via a charge-discharge connection assembly.

[0059] In some embodiments, the first control guidance function signal is a pulse width modulation signal, which represents the magnitude of the discharge current value of the discharge vehicle 40. The duty cycle of the first control guidance function signal is positively correlated with the discharge current value. By adjusting the duty cycle of the first control guidance function signal, the magnitude of the discharge current value can be adjusted.

[0060] In this embodiment, the discharge gun head 20 is electrically connected to the discharge vehicle 40, the charging gun head 30 is electrically connected to the charging vehicle 50, and the charge / discharge connection device 10 is electrically connected to both the charging gun head 30 and the discharge gun head 20. This allows the discharge vehicle 40 to discharge to the charging vehicle 50 using the charge / discharge connection assembly. During this process, the charge / discharge connection device 10 generates a first control guidance function signal for the charging vehicle 50 and collects the charging voltage value of the charging vehicle 50. Since the charging voltage value is negatively correlated with the discharge current value, if the charging voltage value is greater than the voltage threshold, it indicates that the discharge is complete. If the discharge current is too low, the charge / discharge connection device 10 increases the current duty cycle of the first control guidance function signal to increase the discharge current of the discharge vehicle 40. If the charging voltage is less than or equal to the voltage threshold, it indicates that the discharge current is too high. The charge / discharge connection device 10 then decreases the current duty cycle to reduce the discharge current, thereby avoiding the discharge current being too high or too low. This prevents the discharge current from triggering the overcurrent protection of the discharge vehicle and interrupting the discharge due to the discharge current being too high, and also prevents the discharge current from being too low, which would result in low discharge efficiency of the discharge vehicle and long charging time for the charging vehicle.

[0061] Optionally, in some embodiments, when the duty cycle of the first control guidance function signal is the initial duty cycle, the charging voltage value is greater than the voltage threshold; the charging and discharging connection device 10 is specifically used to collect the charging voltage value in each cycle, and in the current cycle, when the charging voltage value is greater than the voltage threshold, increase the current duty cycle by a first preset value, and in the next cycle, when the charging voltage value is less than or equal to the voltage threshold, decrease the current duty cycle by the first preset value, and when the charging voltage value is greater than the voltage threshold, increase the current duty cycle by the first preset value.

[0062] In some embodiments, the initial duty cycle is a preset duty cycle. When the duty cycle of the first control guidance function signal is the initial duty cycle, the charging voltage value is greater than the voltage threshold, that is, the discharge current value is less than the maximum allowable discharge current value of the discharge vehicle 40.

[0063] In this embodiment, the charging and discharging connection device 10 collects the charging voltage value in each cycle. In the current cycle, if the charging voltage value is greater than the voltage threshold, it indicates that the discharge current value is less than the maximum allowable discharge current value of the discharging vehicle 40. The current duty cycle is increased by a first preset value. In the next cycle, if the charging voltage value is less than or equal to the voltage threshold, it indicates that the discharge current value is greater than the maximum allowable discharge current value of the discharging vehicle 40. By decreasing the current duty cycle by the first preset value, the discharge current value is made less than the maximum allowable discharge current value of the discharging vehicle 40, and the discharge current value is close to the maximum allowable discharge current value of the discharging vehicle 40. It is determined that the discharge current value is greater than the preset minimum discharge current value of the discharging vehicle 40. At this time, the charging efficiency is high, and the current discharge current value is maintained for charging.

[0064] When the charging voltage is greater than the voltage threshold, the charging / discharging connection device 10 indicates that the discharge current is less than the maximum allowable discharge current of the discharging vehicle 40. The current duty cycle is increased by a first preset value. In the next cycle, if the charging voltage is greater than the voltage threshold, the discharge current is still less than the maximum allowable discharge current of the discharging vehicle 40. The duty cycle of the first control guidance function signal needs to be increased further. The current duty cycle is increased by the first preset value until the charging voltage is less than or equal to the voltage threshold. The current duty cycle is then decreased by the first preset value. The current discharge current is maintained while charging, resulting in higher charging efficiency.

[0065] For example, in the first cycle, if the charging voltage is greater than the voltage threshold, the current duty cycle is increased by a first preset value. In the second cycle, if the charging voltage is greater than the voltage threshold, the current duty cycle is increased by a first preset value. In the third cycle, if the charging voltage is greater than the voltage threshold, the current duty cycle is increased by a first preset value. In the fourth cycle, if the charging voltage is less than the voltage threshold, the current duty cycle is decreased by a first preset value, and the duty cycle becomes the duty cycle of the third cycle. Then, the discharge current value (i.e., the discharge current value of the third cycle) is maintained for charging.

[0066] Optionally, in some embodiments, the charge-discharge connection device 10 is further configured to, in the current cycle, when the charging voltage value is greater than the voltage threshold, increase the current duty cycle by a first preset value, and in the next cycle, when the charging voltage value is less than or equal to the voltage threshold, decrease the current duty cycle by the first preset value, then obtain a new current duty cycle, determine the new duty cycle as the duty cycle selected by the charge-discharge connection component for this operation, and use the selected duty cycle as the initial duty cycle in the next operation of the charge-discharge connection component.

[0067] In this embodiment, when the charging voltage is greater than the voltage threshold, the charging / discharging connection device 10 increases the current duty cycle by a first preset value. In the next cycle, when the charging voltage is less than or equal to the voltage threshold, the current duty cycle is decreased by the first preset value. Then, a new duty cycle is obtained and determined as the duty cycle selected by the charging / discharging connection component for this operation. When the duty cycle of the first control guidance function signal is the selected duty cycle, the discharge current value is less than the maximum allowable discharge current value of the discharge vehicle 40 and close to the maximum allowable discharge current value of the discharge vehicle 40. The discharge current value is determined to be greater than the preset minimum discharge current value of the discharge vehicle 40. The discharge current value is maintained for charging, resulting in high charging efficiency. Furthermore, by using the selected duty cycle as the initial duty cycle in the next operation of the charging / discharging connection component, when the charging / discharging connection component connects to the same discharge vehicle 40 as the previous one, there is no need to adjust the duty cycle of the first control guidance function signal. The duty cycle can be quickly matched, allowing the next discharge vehicle 40 to directly enter a highly efficient discharge state.

[0068] Optionally, in some embodiments, when the duty cycle of the first control guidance function signal is the initial duty cycle, the charging voltage value is less than or equal to the voltage threshold; the charging and discharging connection device 10 is specifically used to collect the charging voltage value in each cycle, and when the charging voltage value is less than or equal to the voltage threshold, reduce the current duty cycle by a second preset value, and in the next cycle, when the charging voltage value is greater than the voltage threshold, maintain the current duty cycle, and when the charging voltage value is less than or equal to the voltage threshold, reduce the current duty cycle by the second preset value.

[0069] In some embodiments, the initial duty cycle is a preset duty cycle. When the duty cycle of the first control guidance function signal is the initial duty cycle, the charging voltage value is less than or equal to the voltage threshold, that is, the discharge current value is greater than the maximum allowable discharge current value of the discharge vehicle 40.

[0070] In this embodiment, the charging and discharging connection device 10 collects the charging voltage value in each cycle. If the charging voltage value is less than or equal to the voltage threshold, it indicates that the discharge current value is greater than or equal to the maximum allowable discharge current value of the discharging vehicle 40. The current duty cycle is reduced by a second preset value. In the next cycle, if the charging voltage value is greater than the voltage threshold, it indicates that the discharge current value is less than the maximum allowable discharge current value of the discharging vehicle 40 and the discharge current value is close to the maximum allowable discharge current value of the discharging vehicle 40. It is determined that the discharge current value is greater than the preset minimum discharge current value of the discharging vehicle 40. At this time, the charging efficiency is high. By maintaining the current duty cycle, the current discharge current value is maintained for charging.

[0071] In each cycle, the charging and discharging connection device 10 collects the charging voltage value. If the charging voltage value is less than or equal to the voltage threshold, it indicates that the discharge current value is greater than or equal to the maximum allowable discharge current value of the discharging vehicle 40. In this case, the current duty cycle is reduced by a second preset value. In the next cycle, if the charging voltage value is less than or equal to the voltage threshold, it indicates that the discharge current value is still greater than or equal to the maximum allowable discharge current value of the discharging vehicle 40. In this case, the current duty cycle is reduced by the second preset value until the charging voltage value is less than or equal to the voltage threshold. At this time, the current duty cycle is maintained to maintain the current discharge current value for charging, so that the charging efficiency is high.

[0072] For example, in the first cycle, if the charging voltage is less than or equal to the voltage threshold, the current duty cycle is reduced by a second preset value. In the second cycle, if the charging voltage is less than or equal to the voltage threshold, the current duty cycle is reduced by a second preset value. In the third cycle, if the charging voltage is less than or equal to the voltage threshold, the current duty cycle is reduced by a second preset value. In the fourth cycle, if the charging voltage is greater than the voltage threshold, the current duty cycle is maintained to maintain the current discharge current value for charging.

[0073] Optionally, in some embodiments, the charge-discharge connection device 10 is further configured to: reduce the current duty cycle by a second preset value when the charging voltage value is less than or equal to the voltage threshold; and in the next cycle, after maintaining the current duty cycle when the charging voltage value is greater than the voltage threshold, determine the current duty cycle as the duty cycle selected by the charge-discharge connection component for this operation; and in the next operation of the charge-discharge connection component, use the selected duty cycle as the initial duty cycle.

[0074] In this embodiment, when the charging voltage is less than or equal to a voltage threshold, the charging / discharging connection device 10 reduces the current duty cycle by a second preset value. In the next cycle, when the charging voltage is greater than the voltage threshold, the current duty cycle is maintained and then determined as the duty cycle selected by the charging / discharging connection component for this operation. When the duty cycle of the first control guidance function signal is the selected duty cycle, the discharge current value is less than the maximum allowable discharge current value of the discharge vehicle 40 and close to the maximum allowable discharge current value of the discharge vehicle 40. The discharge current value is determined to be greater than the preset minimum discharge current value of the discharge vehicle 40, and the discharge current value is maintained for charging. The charging efficiency is high. By using the selected duty cycle as the initial duty cycle in the next operation of the charging / discharging connection component, when the charging / discharging connection component connects to the same discharge vehicle 40 as the previous one, there is no need to adjust the duty cycle of the first control guidance function signal. The duty cycle can be quickly matched, so that the next discharge vehicle 40 can directly enter a highly efficient discharge state.

[0075] Optionally, in some embodiments, the charge-discharge connection device 10 is further configured to obtain the frequency of use of the duty cycle selected by the charge-discharge connection component each time it operates, and determine the duty cycle selected with the highest frequency of use as the initial duty cycle of the charge-discharge connection component for the next operation.

[0076] In this embodiment, the frequency of the duty cycle selected by the charge-discharge connection device 10 for each operation of the charge-discharge connection component is obtained, and the duty cycle with the highest frequency of use is determined as the initial duty cycle for the next operation of the charge-discharge connection component. Since the discharge vehicle 40 with the highest frequency of use corresponds to the highest frequency of use, the duty cycle can be matched quickly, so that the probability of the discharge vehicle 40 directly entering a more efficient discharge state in the next operation can be improved.

[0077] Optionally, refer to Figure 2 In some embodiments, the charging / discharging connection device 10 includes a control guidance unit 12, a first voltage acquisition unit 13, and a controller 11; the control guidance unit 12 is electrically connected to the charging gun head 30 and the discharging gun head 20 respectively, and the control guidance unit 12 is used to generate the first control guidance function signal; the first voltage acquisition unit 13 is electrically connected to the charging gun head 30 and the controller 11 respectively. Figure 2(Partial connection of the controller 11 is not shown). The first voltage acquisition unit 13 is used to acquire the charging voltage value. The controller 11 is electrically connected to the control guidance unit 12. The controller 11 is used to increase the current duty cycle when the charging voltage value is greater than the voltage threshold, and to decrease the current duty cycle when the charging voltage value is less than or equal to the voltage threshold.

[0078] In some embodiments, the controller 11 is a digital signal processor (DSP).

[0079] In this embodiment, the first control guidance function signal is generated by the control guidance unit 12, and the charging voltage value is collected by the first voltage acquisition unit 13. Then, the controller 11 increases the current duty cycle when the charging voltage value is greater than the voltage threshold, and decreases the current duty cycle when the charging voltage value is less than or equal to the voltage threshold, so as to adjust the discharge current value. This makes the discharge current value less than the maximum allowable discharge current value of the discharge vehicle 40 and greater than the preset minimum discharge current value of the discharge vehicle 40. At this time, the charging efficiency is high, thereby avoiding the discharge current value being too large or too small for different vehicles, and improving the adaptability of the charging and discharging connection component to different discharge vehicles 40.

[0080] Optionally, in some embodiments, the control guidance unit 12 is further configured to convert the first voltage signal output by the discharge vehicle 40 into a second voltage signal, and use it as a second control guidance function signal for the charging vehicle 50.

[0081] In some embodiments, the voltage value of the first voltage signal is 220 volts, the voltage value of the second voltage signal is 12 volts, and the second control guidance function signal is a voltage signal with an amplitude of 12 volts.

[0082] In this embodiment, the first voltage signal output by the discharge vehicle 40 is converted into a second voltage signal by the control guidance unit 12, and used as the second control guidance function signal of the charging vehicle 50, so that the charging vehicle 50 enters the state of preparing to charge.

[0083] Optionally, in some embodiments, the control guidance unit 12 includes a pulse width modulation generator 121 and a voltage converter 122; the pulse width modulation generator 121 is electrically connected to the charging gun head 30, the voltage converter 122 and the controller 11 respectively, and the pulse width modulation generator 121 is used to generate the first control guidance function signal; the voltage converter 122 is electrically connected to the discharging gun head 20 and the charging gun head 30 respectively, and the voltage converter 122 is used to convert the first voltage signal into a second voltage signal, and serve as the second control guidance function signal and the power supply signal for the pulse width modulation generator 121.

[0084] In this embodiment, a first control guidance function signal is generated by a pulse width modulation generator 121, and then the first voltage signal output by the discharge vehicle 40 is converted into a second voltage signal by a voltage converter 122. This second voltage signal serves as the second control guidance function signal for the charging vehicle 50 and the power supply signal for the pulse width modulation generator 121, thereby providing control guidance function signals for the charging vehicle 50 at different stages.

[0085] Optionally, in some embodiments, the first input terminal of the voltage converter 122 is electrically connected to the first power supply terminal 201 of the discharge gun head 20, the second input terminal of the voltage converter 122 is electrically connected to the second power supply terminal 202 of the discharge gun head 20, and the output terminal of the voltage converter 122 is electrically connected to the control and guidance function terminal 303 of the charging gun head 30; the output terminal of the voltage converter 122 is electrically connected to the power supply terminal of the pulse width modulation generator 121, the control terminal of the pulse width modulation generator 121 is electrically connected to the controller 11, and the output terminal of the pulse width modulation generator 121 is electrically connected to the control and guidance function terminal 303 of the charging gun head 30.

[0086] In this embodiment, the voltage converter 122 is electrically connected to the first power supply terminal 201 of the discharge gun head 20 via its first input terminal, and to the second power supply terminal 202 of the discharge gun head 20 via its second input terminal, enabling the voltage converter 122 to acquire the first voltage signal output by the discharge vehicle 40. The voltage converter 122 is also electrically connected to the control guidance function terminal 303 of the charging gun head 30 via its output terminal, allowing the voltage converter 122 to provide a second control guidance function signal to the charging vehicle 50. Furthermore, the voltage converter 122 is electrically connected to the power supply terminal of the pulse width modulation generator 121 via its output terminal, enabling the voltage converter 122 to supply power to the pulse width modulation generator 121. The pulse width modulation generator 121 is also electrically connected to the controller 11 via its control terminal, allowing the controller 11 to control the duty cycle of the first control guidance function signal generated by the pulse width modulation generator 121. Finally, the pulse width modulation generator 121 is electrically connected to the control guidance function terminal 303 of the charging gun head 30, enabling the pulse width modulation generator 121 to provide a first control guidance function signal to the charging vehicle 50.

[0087] Optionally, in some embodiments, the charge / discharge connection device 10 further includes a second voltage acquisition unit 14; the second voltage acquisition unit 14 is electrically connected to the voltage converter 122 and the controller 11 respectively, and the second voltage acquisition unit 14 is used to acquire the voltage value of the second control guidance function signal; the controller 11 is also used to control the pulse width modulation generator 121 to generate the first control guidance function signal when the voltage value of the second control guidance function signal becomes a preset voltage value.

[0088] In some embodiments, the preset voltage value is 9 volts.

[0089] In this embodiment, the voltage value of the second control guidance function signal is collected by the second voltage acquisition device 14. When the voltage value of the second control guidance function signal becomes a preset voltage value, it indicates that the charging vehicle 50 is in a charging preparation state. The controller 11 controls the pulse width modulation generator 121 to generate the first control guidance function signal, so as to provide the charging vehicle 50 with the first control guidance function signal required for charging.

[0090] Optionally, in some embodiments, the charging and discharging connection device 10 further includes a first switching device K1; the first end of the first switching device K1 is electrically connected to the grounding terminal 204 of the discharge gun head 20 and the grounding terminal 304 of the charging gun head 30, respectively, and the second end of the first switching device K1 is electrically connected to the grounding terminal of the second voltage collector 14; the collecting terminal of the second voltage collector 14 is electrically connected to the output terminal of the voltage converter 122, and the output terminal of the second voltage collector 14 is electrically connected to the first end of the controller 11.

[0091] In some embodiments, the first switching device K1 is a relay, a MOS transistor (Metal-Oxide-Semiconductor Field-Effect Transistor), or other types of switching devices.

[0092] In this embodiment, the controller 11 controls the first switching device K1 to be turned on, so that the second voltage acquisition device 14 can acquire the voltage value of the second control guidance function signal; the controller 11 controls the first switching device K1 to be turned off, so that the second voltage acquisition device 14 stops acquiring the voltage value of the second control guidance function signal.

[0093] Optionally, in some embodiments, the charging and discharging connection device 10 further includes a second switching device K2; the first end of the second switching device K2 is electrically connected to the first power supply terminal 201 of the discharge gun head 20, the second end of the second switching device K2 is electrically connected to the first power supply terminal 301 of the charging gun head 30, and the control terminal of the second switching device K2 is electrically connected to the second end of the controller 11.

[0094] In some embodiments, the first power terminal 301 of the charging gun head 30 is a positive terminal, and the first power terminal 301 of the charging gun head 30 is used to connect to the live wire terminal of the charging and discharging terminal of the charging vehicle 50; the first power terminal 201 of the discharging gun head 20 is a positive terminal, and the first power terminal 201 of the discharging gun head 20 is used to connect to the live wire terminal of the charging and discharging terminal of the discharging vehicle 40.

[0095] In some embodiments, the second switching device K2 is a relay, a MOSFET, or other types of switching device.

[0096] In this embodiment, the controller 11 controls the second switching device K2 to be turned on, so that the first power terminal 201 of the discharge gun head 20 is connected to the first power terminal 301 of the charging gun head 30; the controller 11 controls the second switching device K2 to be turned off, so that the first power terminal 201 of the discharge gun head 20 is disconnected from the first power terminal 301 of the charging gun head 30.

[0097] Optionally, in some embodiments, the charging and discharging connection device 10 further includes a third switching device K3; the first end of the third switching device K3 is electrically connected to the second power supply terminal 202 of the discharge gun head 20, the second end of the third switching device K3 is electrically connected to the second power supply terminal 302 of the charging gun head 30, and the control terminal of the third switching device K3 is electrically connected to the second terminal of the controller 11.

[0098] In some embodiments, the second power terminal 302 of the charging gun head 30 is a negative terminal, and the second power terminal 302 of the charging gun head 30 is used to connect to the neutral terminal of the charging and discharging terminal of the charging vehicle 50; the second power terminal 202 of the discharging gun head 20 is a negative terminal, and the second power terminal 202 of the discharging gun head 20 is used to connect to the neutral terminal of the charging and discharging terminal of the discharging vehicle 40.

[0099] In some embodiments, the third switching device K3 is a relay, a MOSFET, or other types of switching device.

[0100] In this embodiment, the controller 11 controls the third switching device K3 to be turned on, so that the second power terminal 202 of the discharge gun head 20 is connected to the second power terminal 302 of the charging gun head 30; the controller 11 controls the third switching device K3 to be turned off, so that the second power terminal 202 of the discharge gun head 20 is disconnected from the second power terminal 302 of the charging gun head 30.

[0101] It should be noted that when both the second switch K2 and the third switch K3 are turned on, the discharge vehicle 40 discharges to the charging vehicle 50 through the charge-discharge connection assembly to charge the charging vehicle 50; when both the second switch K2 and the third switch K3 are turned off, the discharge vehicle 40 stops discharging to the charging vehicle 50 through the charge-discharge connection assembly, that is, stops charging the charging vehicle 50.

[0102] Optionally, in some embodiments, the controller 11 is further configured to control the second switching device K2 and the third switching device K3 to be turned on in response to an external charging command, and to control the second switching device K2 and the third switching device K3 to be turned off in response to an external stop charging command.

[0103] In some embodiments, the external charging command is a user charging command, such as an external charging command triggered by the user turning on the switch; the external stop charging command is a user stopping charging command, such as an external stop charging command triggered by the user turning off the switch.

[0104] In this embodiment, the controller 11 responds to an external charging command by controlling the second switching device K2 and the third switching device K3 to be turned on, so that the discharging vehicle 40 discharges to the charging vehicle 50 through the charging and discharging connection assembly to charge the charging vehicle 50; the controller 11 responds to an external stop charging command by controlling the second switching device K2 and the third switching device K3 to be turned off, so that the discharging vehicle 40 stops discharging to the charging vehicle 50 through the charging and discharging connection assembly, that is, stops charging the charging vehicle 50.

[0105] Optionally, in some embodiments, the charging and discharging connection device 10 further includes a third voltage collector 15; the first terminal of the third voltage collector 15 is electrically connected to the first terminal of the second switching device K2, the second terminal of the third voltage collector 15 is electrically connected to the second terminal of the second switching device K2, the third terminal of the third voltage collector 15 is electrically connected to the first terminal of the third switching device K3, and the fourth terminal of the third voltage collector 15 is electrically connected to the second terminal of the third switching device K3.

[0106] In this embodiment of the application, the voltage difference across the second switching device K2 and the voltage difference across the third switching device K3 are collected by the third voltage acquisition device 15.

[0107] Optionally, in some embodiments, the third voltage acquisition unit 15 is used to acquire a first voltage value between the first terminal of the second switching device K2 and the first terminal of the third switching device K3, and to acquire a second voltage value between the second terminal of the second switching device K2 and the second terminal of the third switching device K3; the controller 11 is further used to determine that the second switching device K2 and the third switching device K3 are faulty if the difference between the first voltage value and the second voltage value is greater than a difference threshold.

[0108] In some embodiments, the failure of the second switching device K2 and the third switching device K3 includes damage to the second switching device K2 and the third switching device K3, such as sintering of the second switching device K2 and the third switching device K3.

[0109] In this embodiment, the third voltage acquisition device 15 acquires the first voltage value between the first terminal of the second switching device K2 and the first terminal of the third switching device K3, and acquires the second voltage value between the second terminal of the second switching device K2 and the second terminal of the third switching device K3. Then, the controller 11 determines that the second switching device K2 and the third switching device K3 are faulty when the difference between the first voltage value and the second voltage value is greater than the difference threshold, so as to realize the fault detection of the second switching device K2 and the third switching device K3.

[0110] Optionally, in some embodiments, the charging and discharging connection device 10 further includes an alarm device; the controller 11 is electrically connected to the alarm device, and the controller 11 is used to control the alarm device to display alarm information in the event of a failure of the second switching device K2 and the third switching device K3.

[0111] In some embodiments, the alarm device includes indicator lights, buzzers, etc.; alarm information includes audible and visual alarms, lights, etc.

[0112] In this embodiment, the controller 11 controls the alarm device to display alarm information in the event of a fault in the second switching device K2 and the third switching device K3, so that staff can be informed.

[0113] Optionally, in some embodiments, the charging and discharging connection device 10 further includes a fourth switching device K4, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4; the first end of the fourth switching device K4 is electrically connected to the connection confirmation terminal 205 of the discharge gun head 20, the second end of the fourth switching device K4 is electrically connected to the first end of the first resistor R1, and the control terminal of the fourth switching device K4 is electrically connected to the third terminal of the controller 11; the second end of the first resistor R1 is electrically connected to the first end of the second resistor R2; the second... The second end of resistor R2 is electrically connected to the grounding terminal 204 of the discharge gun head 20 and the grounding terminal 304 of the charging gun head 30, respectively; the first end of the third resistor R3 is electrically connected to the connection confirmation terminal 205 of the discharge gun head 20, and the second end of the third resistor R3 is electrically connected to the first end of the first resistor R1; the first end of the fourth resistor R4 is electrically connected to the grounding terminal 204 of the discharge gun head 20 and the grounding terminal 304 of the charging gun head 30, respectively, and the second end of the fourth resistor R4 is electrically connected to the connection confirmation terminal 305 of the charging gun head 30.

[0114] It should be noted that the connection confirmation (CC) terminal of the discharge gun head 20 is used to connect with the connection confirmation terminal of the charging / discharging port of the discharge vehicle 40, and the connection confirmation terminal of the charging / discharging port of the discharge vehicle 40 is used to identify the resistance value of the connection confirmation signal; the connection confirmation terminal 305 of the charging gun head 30 is used to connect with the connection confirmation terminal of the charging / discharging port of the charging vehicle 50, and the connection confirmation terminal of the charging / discharging port of the charging vehicle 50 is used to identify the resistance value of the connection confirmation signal; the ground terminal 204 (PE, Protective Earth) of the discharge gun head 20 is used to connect with the ground terminal of the charging / discharging port of the discharge vehicle 40, and the ground terminal of the charging / discharging port of the discharge vehicle 40 is used for grounding; the ground terminal 304 of the charging gun head 30 is used to connect with the ground terminal of the charging / discharging port of the charging vehicle 50, and the ground terminal of the charging / discharging port of the charging vehicle 50 is used for grounding.

[0115] In some embodiments, the fourth switching device K4 is a relay, a MOSFET, or other types of switching device.

[0116] In this embodiment, when the fourth switching device K4 is turned on, the sum of the resistance values ​​of the first resistor R1 and the second resistor R2 is the resistance value of the connection confirmation signal recognized by the discharge vehicle 40; when the fourth switching device K4 is turned off, the third resistor R3 increases the resistance value of the connection confirmation signal terminal recognized by the discharge vehicle 40, causing the discharge vehicle 40 to restart external discharge; the resistance value of the fourth resistor R4 is the resistance value of the connection confirmation signal recognized by the charging vehicle 50.

[0117] Optionally, in some embodiments, the controller 11 is configured to control the fourth switching device K4 to be turned on in response to an external charging command, so as to enable the discharge vehicle 40 to perform a discharge connection confirmation, and to control the fourth switching device K4 to be turned off in response to an external stop charging command or in the event of a failure of the charging and discharging connection component, so as to enable the discharge vehicle 40 to restart or stop discharging.

[0118] In this embodiment, the controller 11 responds to an external charging command by controlling the fourth switching device K4 to turn on. Since the first resistor R1 and the second resistor R2 are connected to the connection confirmation terminal of the charging / discharging port of the discharging vehicle 40, and the sum of the resistance values ​​of the first resistor R1 and the second resistor R2 is the resistance value of the connection confirmation signal recognized by the discharging vehicle 40, the discharging vehicle 40 performs a discharge connection confirmation, thereby starting the discharge. In response to an external stop charging command or in the event of a fault in the charging / discharging connection component, the controller controls the fourth switching device K4 to turn off. Since the first resistor R1, the second resistor R2, and the third resistor R3 are connected to the connection confirmation terminal of the charging / discharging port of the discharging vehicle 40, and the sum of the resistance values ​​of the first resistor R1, the second resistor R2, and the third resistor R3 is greater than the resistance value of the connection confirmation signal recognized by the discharging vehicle 40, the discharging vehicle 40 restarts or stops discharging.

[0119] In some embodiments, the discharge gun head 20 is marked with the sum of the resistance values ​​of the first resistor R1 and the second resistor R2, and the charging gun head 30 is marked with the resistance value of the fourth resistor R4, to prevent the discharge gun head 20 from being misconnected to the charging vehicle 50 and the charging gun head 30 from being misconnected to the discharge vehicle 40.

[0120] It should be noted that when the charging vehicle 50 receives the CC and CP signals, it enters the charging preparation process and waits for AC voltage. When the discharging vehicle 40 is connected to the discharging gun head 20, the on-board charger (OBC) of the discharging vehicle 40 is activated. When the discharging vehicle 40 detects the CC resistance value of the discharging gun head 20 (i.e., the sum of the resistance values ​​of the first resistor R1 and the second resistor R2), the instrument of the discharging vehicle 40 displays the plug-in signal, and the discharging vehicle 40 recognizes that it has entered the discharge process of new energy vehicle to new energy vehicle (V2V, Vehicle to Vehicle). When the charging vehicle 50 is connected to the charging gun head 30, the on-board charger of the charging vehicle 50 is activated. The charging vehicle 50 detects the CC resistance value of the charging gun head 30 (the resistance value of the fourth resistor R4), and the charging vehicle 50 enters the normal charging waiting process.

[0121] In some embodiments, the controller 11 is further configured to, after the discharge vehicle 40 restarts discharging, if the charging voltage value is greater than the voltage threshold and the duration of the charging voltage value being greater than the voltage threshold is greater than a preset duration, gradually restore the duty cycle of the first control guidance function signal to the duty cycle of the first control guidance function signal before the vehicle restarts by increasing the duty cycle of the first control guidance function signal by a first preset value in each cycle.

[0122] Optionally, in some embodiments, the charging and discharging connection device 10 further includes a fifth switching device K5; the first end of the fifth switching device K5 is electrically connected to the connection confirmation end 205 of the discharge gun head 20, the second end of the fifth switching device K5 is electrically connected to the fourth end of the controller 11, the control end of the fifth switching device K5 is electrically connected to the fifth end of the controller 11, and the sixth end of the controller 11 is electrically connected to the control guidance function end 203 of the discharge gun head 20.

[0123] In some embodiments, the fifth switching device K5 is a relay, a MOSFET, or other types of switching devices.

[0124] In this embodiment, the connection confirmation terminal 205 of the discharge gun head 20 is connected to the fourth terminal of the controller 11 by turning on the fifth switching device K5; the connection confirmation terminal 205 of the discharge gun head 20 is disconnected from the fourth terminal of the controller 11 by turning off the fifth switching device K5.

[0125] Optionally, the controller 11 is further configured to control the fifth switching device K5 to turn on when the control guidance function terminal 203 of the discharge gun head 20 outputs voltage, and to control the fifth switching device K5 to turn off when the control guidance function terminal 203 of the discharge gun head 20 stops outputting voltage; the control guidance function terminal 203 and the connection confirmation terminal 205 of the discharge gun head 20 are used to connect to external devices to enable software burning, software upgrades or data reading of the controller 11 through the external devices.

[0126] In this embodiment, the discharge gun head 20 is connected to an external device via the control guidance function terminal 203 and the connection confirmation terminal 205. When the control guidance function terminal 203 of the discharge gun head 20 outputs voltage, the controller 11 controls the fifth switching device K5 to conduct, thereby connecting the connection confirmation terminal 205 of the discharge gun head 20 to the fourth terminal of the controller 11. This allows the controller 11 to perform software programming, software upgrades, or data reading via an external device. When the control guidance function terminal 203 of the discharge gun head 20 stops outputting voltage, it indicates that the control guidance function terminal 203 of the discharge gun head 20 is disconnected from the external device. The controller 11 then controls the fifth switching device K5 to turn off, restoring the charging and discharging function of the charging and discharging connection assembly.

[0127] Optionally, in some embodiments, reference is made to Figure 3 The discharge gun head 20 and the charge / discharge connection device 10 are disposed in the integrated device 60, and the charging gun head 30 is connected to the integrated device 60 by a cable, or: refer to Figure 4 The discharge gun head 20 is connected to the charging and discharging connection device 10 via a cable, and the charging and discharging connection device 10 is connected to the charging gun head 30 via a cable.

[0128] In this embodiment, since the discharge gun head 20 and the charge / discharge connection device 10 are disposed in the integrated device 60, and the charging gun head 30 is connected to the integrated device 60 by a cable, the integration is improved. Furthermore, the integrated device 60 and the discharge gun head 20 can be disassembled for easy carrying and replacement. Since the discharge gun head 20 is connected to the charge / discharge connection device 10 by a cable, and the charge / discharge connection device 10 is connected to the charging gun head 30 by a cable, the discharge gun head 20, the charge / discharge connection device 10, and the charging gun head 30 can be disassembled for easy carrying and replacement.

[0129] Optionally, in some embodiments, the controller 11 is also used to store the time of failure of the charge-discharge connection component for external devices to read.

[0130] In some embodiments, faults in the charging and discharging connection components include overcurrent discharge and relay sintering. Overcurrent discharge refers to an excessively large discharge current value, i.e., the discharge current value is greater than the maximum allowable discharge current value of the discharge vehicle 40. Relay sintering refers to the sintering of the second switching device K2 and the third switching device K3.

[0131] In some embodiments, the controller 11 is also configured to clear the time of failure of the charging and discharging connection component stored in the controller 11 after a preset recording time.

[0132] In this embodiment, the controller 11 stores the time of the charging and discharging connection component failure for external devices to read, so that staff can know the failure status of the charging and discharging connection component, i.e., the controller 11 is reset.

[0133] Reference Figure 2 This application embodiment also provides a charging and discharging connection device 10 for connecting a discharging vehicle 40 and a charging vehicle 50, comprising: a control guidance unit 12, the control guidance unit 12 being adapted to connect the charging and discharging port of the discharging vehicle 40 and the control guidance port of the charging vehicle 50; a first voltage acquisition unit 13, the first voltage acquisition unit 13 being adapted to connect the charging and discharging port of the discharging vehicle 40 and / or the charging and discharging port of the charging vehicle 50, the first voltage acquisition unit 13 being used to acquire a charging voltage value; wherein, the control guidance unit 12 is used to generate a first control guidance signal for the charging vehicle 50, the first control guidance signal being adjustable according to the charging voltage value.

[0134] In this embodiment, a control guidance unit is connected to the charging / discharging port of the discharging vehicle and the control guidance port of the charging vehicle. A first voltage acquisition unit is connected to the charging / discharging port of the discharging vehicle and / or the charging / discharging port of the charging vehicle. The first voltage acquisition unit acquires the charging voltage value, and the control guidance unit generates a first control guidance signal for the charging vehicle. Since the first control guidance signal can be adjusted according to the charging voltage value, when the discharging vehicle discharges to the charging vehicle, the discharge current value of the discharging vehicle can be adjusted by adjusting the first control guidance signal of the charging vehicle. This avoids the discharge current value of the discharging vehicle being too large or too small, thereby avoiding the problem that the discharge current value is too large and triggers the overcurrent protection of the discharging vehicle to interrupt the discharge, and that the discharge current value is too small and results in low discharge efficiency of the discharging vehicle, which leads to a long charging time for the charging vehicle.

[0135] Optionally, in some embodiments, the control guidance unit 12 includes: a pulse width modulation generator 121, a first end of which is adapted to be connected to the charging / discharging port of the discharging vehicle 40, and a second end of which is adapted to be connected to the control guidance port of the charging vehicle 50; the pulse width modulation generator 121 is used to generate a first control guidance signal in PWM form, the duty cycle of which can be adjusted according to the charging voltage value.

[0136] Optionally, in some embodiments, the control guidance unit 12 further includes a voltage converter 122, which is used to convert the first voltage signal output by the discharge vehicle 40 into a second voltage signal as a second control guidance signal for the charging vehicle 50.

[0137] Optionally, in some embodiments, the first end of the voltage converter 122 is adapted to be connected to the charging / discharging port of the discharge vehicle 40, and the second end of the voltage converter 122 is adapted to be connected to the first end of the pulse width modulation generator 121.

[0138] Optionally, in some embodiments, the charge / discharge connection device 10 further includes: a second voltage acquisition unit 14, used to acquire the voltage value of the second control guidance signal; the control guidance unit 12 is configured to generate the first control guidance signal when the voltage value of the second control guidance signal reaches a preset voltage value.

[0139] Optionally, in some embodiments, the first end of the second voltage acquisition device 14 is adapted to connect to the PE port of the discharge vehicle, and the second end of the second voltage acquisition device 14 is adapted to connect to the control guidance port of the discharge vehicle.

[0140] Optionally, in some embodiments, the charging and discharging connection device 10 further includes: a first switching device K1, the first end of the first switching device K1 being adapted to connect to the PE port of the discharging vehicle 40, and the second end of the first switching device K1 being connected to the first end of the second voltage acquisition device 14.

[0141] Optionally, in some embodiments, the charging / discharging connection device 10 further includes: a second switching device K2, the first end of which is adapted to be electrically connected to the first power supply terminal of the discharging vehicle 40, and the second end of which is adapted to be electrically connected to the first power supply terminal of the charging vehicle 50; and a third switching device K3, the first end of which is adapted to be electrically connected to the second power supply terminal of the discharging vehicle 40, and the second end of which is adapted to be electrically connected to the second power supply terminal of the charging vehicle 50.

[0142] Optionally, in some embodiments, the charging and discharging connection device 10 further includes: a third voltage collector 15, wherein a first terminal of the third voltage collector 15 is electrically connected to a first terminal of the second switching device K2, a second terminal of the third voltage collector 15 is electrically connected to a second terminal of the second switching device K2, a third terminal of the third voltage collector 15 is electrically connected to a first terminal of the third switching device K3, and a fourth terminal of the third voltage collector 15 is electrically connected to a second terminal of the third switching device K3.

[0143] Optionally, in some embodiments, the charge / discharge connection device 10 further includes a controller 11, which is electrically connected to the control guidance unit 12, and the controller 11 is used to adjust the first control guidance signal according to the charging voltage value.

[0144] Optionally, in some embodiments, the charging / discharging connection device 10 further includes: a fourth switching device K4, the first end of which is electrically connected to the connection confirmation terminal of the discharging vehicle 40, and the second end of which is electrically connected to the first end of the first resistor R1; a first resistor R1, the second end of which is electrically connected to the first end of the second resistor R2; a second resistor R2, the second end of which is electrically connected to the PE port of the discharging vehicle 40 and the PE port of the charging vehicle 50, respectively; and a third resistor R3, the first end of which is electrically connected to the connection confirmation terminal of the discharging vehicle 40, and the second end of which is electrically connected to the first end of the first resistor R1.

[0145] Optionally, in some embodiments, the charging and discharging connection device 10 further includes a fourth resistor R4, the first end of which is electrically connected to the PE port of the discharging vehicle 40 and the PE port of the charging vehicle 50, respectively, and the second end of which is electrically connected to the connection confirmation terminal of the charging vehicle 50.

[0146] The specific implementation process described above is similar to the implementation process described earlier, and will not be repeated here.

[0147] Reference Figure 5In some embodiments, the charging and discharging process of the charging and discharging connection assembly includes: X1, connecting the discharge gun head 20 to the discharge vehicle 40 and the charging gun head 30 to the charging vehicle 50; X2, detecting whether the relay is sintered, i.e., the controller 11 determines whether the difference between the first voltage value and the second voltage value is greater than the difference threshold; X3, disconnecting the charging-side relay and stopping charging, i.e., if the controller 11 determines that the second switching device K2 and the third switching device K3 are faulty when the difference between the first voltage value and the second voltage value is greater than the difference threshold, and controls the fourth switching device K4 to turn off, so that the discharge vehicle 40 stops charging the charging vehicle 50; X4, sending a second control guidance function signal, i.e., the voltage converter 122 generates a second control guidance function signal and outputs it to the charging vehicle 50; X5, sending a first control guidance function signal, i.e., the control guidance unit 12 generates a first control guidance function signal and outputs it to the charging vehicle 50; X6, the amplitude is 6 volts, i.e. the controller 11 determines whether the voltage value of the second control guidance function signal changes to 6 volts;

[0148] X7. Close the relay to start discharging. Specifically, when the voltage value of the second control guidance function signal changes to 6 volts, the controller 11 controls the second switch K2 and the third switch K3 to close, and the discharging vehicle 40 begins discharging to the charging vehicle 50 to charge the charging vehicle 50. X8. Discharge overcurrent. The controller 11 determines whether there is a discharge overcurrent, specifically whether the charging voltage value is less than the voltage threshold. X9. Duty cycle drops to 0, the relay opens, and discharging stops. Specifically, in the case of discharge overcurrent, the relay at the charging / discharging end of the discharging vehicle 40 opens, and the discharging vehicle 40 stops discharging. X10. Increase the duty cycle according to the first preset value. In the previous cycle, if the charging voltage is greater than the voltage threshold, the current duty cycle is increased by a first preset value; X11, discharge overcurrent, that is, the controller 11 determines whether there is a discharge overcurrent, that is, the controller 11 determines whether the charging voltage is less than the voltage threshold; X12, decrease the duty cycle and maintain the discharge at the previous current level, that is, in the next cycle, if the charging voltage is less than or equal to the voltage threshold, the current duty cycle is decreased by a first preset value, and then the current discharge current value is maintained for charging; X13, increase the duty cycle according to the first preset value, that is, in the current cycle, if the charging voltage is greater than the voltage threshold, the current duty cycle is increased by a first preset value.

[0149] Reference Figure 6In some embodiments, the charging and discharging process of the charging and discharging connection assembly includes: Y1, connecting the discharge gun head 20 to the discharge vehicle 40 and connecting the charging gun head 30 to the charging vehicle 50; Y2, detecting whether the relay is sintered, i.e., the controller 11 determines whether the difference between the first voltage value and the second voltage value is greater than the difference threshold; Y3, disconnecting the charging-side relay and stopping charging, i.e., if the controller 11 determines that the second switching device K2 and the third switching device K3 are faulty when the difference between the first voltage value and the second voltage value is greater than the difference threshold, and controls the fourth switching device K4 to turn off, so that the discharge vehicle 40 restarts or stops discharging; Y4, sending a second control guidance function signal, i.e., the voltage converter 122 generates a second control guidance function signal and outputs it to the charging vehicle 50; Y5, sending a first control guidance function signal, i.e., the control guidance unit 12 generates a first control guidance function signal and outputs it to the charging vehicle 50; Y6, the amplitude is 6 volts, i.e. the controller 11 determines whether the voltage value of the second control guidance function signal changes to 6 volts;

[0150] Y7. Close the relay to start discharging, that is, when the voltage value of the second control guidance function signal becomes 6 volts, the controller 11 controls the second switching device K2 and the third switching device K3 to close; Y8. Discharge overcurrent, that is, the controller 11 determines whether there is discharge overcurrent, that is, the controller 11 determines whether the charging voltage value is less than the voltage threshold; Y9. Maintain the discharge state, that is, when the charging voltage value is greater than the voltage threshold, maintain the current duty cycle; Y10. Decrease the duty cycle according to the second preset value, that is, when the charging voltage value is less than or equal to the voltage threshold, decrease the current duty cycle to the second preset value.

[0151] In some embodiments, this application also provides a charge-discharge connection assembly, including: a discharge gun head 20 for connection to a discharge vehicle 40; and a charge-discharge connection device 10 as described above, wherein the charge-discharge connection device 10 is connected to the discharge gun head 20.

[0152] Optionally, the charging and discharging connection assembly further includes: a charging gun head 30 for connecting to the charging vehicle 50; the charging gun head 30 is connected to the charging and discharging connection device 10.

[0153] The specific implementation process described above is similar to the implementation process described earlier, and will not be repeated here.

[0154] In some embodiments, this application also provides a charging and discharging system, including: a charging vehicle and a discharging vehicle; and a charging and discharging connection component as described above.

[0155] The specific implementation process of the charging and discharging connection component in the charging and discharging system is similar to the aforementioned implementation process, and will not be repeated here.

[0156] In summary, in this embodiment, a control guidance unit is connected to the charging / discharging port of the discharging vehicle and the control guidance port of the charging vehicle. A first voltage acquisition unit is connected to the charging / discharging port of the discharging vehicle and / or the charging / discharging port of the charging vehicle. The first voltage acquisition unit acquires the charging voltage value, and the control guidance unit generates a first control guidance signal for the charging vehicle. Since the first control guidance signal can be adjusted according to the charging voltage value, when the discharging vehicle discharges to the charging vehicle, the discharge current value of the discharging vehicle can be adjusted by adjusting the first control guidance signal of the charging vehicle. This avoids the discharge current value of the discharging vehicle being too large or too small, thereby avoiding the problem of the discharge current value being too large triggering the overcurrent protection of the discharging vehicle and interrupting the discharge, and the discharge current value being too small resulting in low discharge efficiency of the discharging vehicle and long charging time of the charging vehicle.

[0157] Reference Figure 7 This application also provides a charge / discharge connection control method, applied to the charge / discharge connection device 10 as described above, the method comprising:

[0158] Step 101: Generate the first control guidance signal for the charging vehicle 50.

[0159] The implementation of this step is similar to the specific implementation process of the aforementioned charging and discharging connection component, and will not be repeated here.

[0160] Step 102: Adjust the first control guidance signal according to the charging voltage value.

[0161] The implementation of this step is similar to the specific implementation process of the aforementioned charging and discharging connection component, and will not be repeated here.

[0162] Optionally, in some embodiments, the first control guidance signal is a PWM signal, and step 102 includes the following sub-steps:

[0163] Sub-step 1021: When the charging voltage value is greater than the voltage threshold, increase the duty cycle of the first control guidance signal to increase the discharge current value of the discharge vehicle (40).

[0164] The implementation of this step is similar to the specific implementation process of the aforementioned charging and discharging connection component, and will not be repeated here.

[0165] Optionally, in some embodiments, sub-step 1021 includes the following steps:

[0166] Step 1021a: In each cycle, the charging voltage value is collected.

[0167] The implementation of this step is similar to the specific implementation process of the aforementioned charging and discharging connection component, and will not be repeated here.

[0168] Step 1021b: If the charging voltage value in the first cycle is greater than the voltage threshold, increase the duty cycle of the first control guidance signal in the first cycle by a first preset value.

[0169] The implementation of this step is similar to the specific implementation process of the aforementioned charging and discharging connection component, and will not be repeated here.

[0170] In step 1021c, if the charging voltage value in the second cycle is less than or equal to the voltage threshold, the duty cycle of the first control guide signal in the second cycle is adjusted to the duty cycle of the first control guide signal in the first cycle; the second cycle is later than the first cycle.

[0171] The implementation of this step is similar to the specific implementation process of the aforementioned charging and discharging connection component, and will not be repeated here.

[0172] Optionally, in some embodiments, the first control guidance signal is a PWM signal, and step 102 includes the following sub-steps:

[0173] Sub-step 1022: If the charging voltage value is less than or equal to the voltage threshold, reduce the duty cycle of the first control guidance signal to reduce the discharge current value.

[0174] The implementation of this step is similar to the specific implementation process of the aforementioned charging and discharging connection component, and will not be repeated here.

[0175] Optionally, in some embodiments, sub-step 1022 includes the following steps:

[0176] Step 1022a: In each cycle, the charging voltage value is collected.

[0177] The implementation of this step is similar to the specific implementation process of the aforementioned charging and discharging connection component, and will not be repeated here.

[0178] Step 1022b: If the charging voltage value in the first cycle is less than or equal to the voltage threshold, reduce the duty cycle of the first control guidance signal in the first cycle by a second preset value.

[0179] The implementation of this step is similar to the specific implementation process of the aforementioned charging and discharging connection component, and will not be repeated here.

[0180] In step 1022c, if the charging voltage value in the second cycle is greater than the voltage threshold, the duty cycle of the first control guidance signal in the second cycle is maintained; the second cycle is later than the first cycle.

[0181] The implementation of this step is similar to the specific implementation process of the aforementioned charging and discharging connection component, and will not be repeated here.

[0182] Optionally, in some embodiments, the method further includes the following steps:

[0183] Step 103: Obtain the frequency of use of the duty cycle selected by the discharge vehicle (40) to discharge to the charging vehicle (50) for multiple historical periods.

[0184] The implementation of this step is similar to the specific implementation process of the aforementioned charging and discharging connection component, and will not be repeated here.

[0185] Step 104: Determine the duty cycle with the highest usage frequency as the initial duty cycle.

[0186] The implementation of this step is similar to the specific implementation process of the aforementioned charging and discharging connection component, and will not be repeated here.

[0187] This application also provides a storage medium or program product, wherein the program or instructions are used to implement the charging and discharging connection control method as described above, and the specific implementation is similar to that described above, and will not be repeated here.

[0188] In summary, in this embodiment, by generating a first control guidance function signal for the charging vehicle and collecting the charging voltage value of the charging vehicle, since the charging voltage value is negatively correlated with the discharge current value, if the charging voltage value is greater than the voltage threshold, it indicates that the discharge current value is too small, and the current duty cycle of the first control guidance function signal is increased to increase the discharge current value of the charging vehicle. Conversely, if the charging voltage value is less than or equal to the voltage threshold, it indicates that the discharge current value is too large, and the current duty cycle is decreased to reduce the discharge current value. This avoids the problems of excessively large or small discharge current values ​​triggering overcurrent protection of the charging vehicle and interrupting discharge, and excessively small discharge current values ​​leading to low discharge efficiency and long charging time for the charging vehicle.

[0189] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited. Functions may be performed in the order shown or discussed, or may be performed substantially simultaneously or in reverse order depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0190] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A charging / discharging connection device (10) for connecting a discharging vehicle (40) and a charging vehicle (50), characterized in that, include: A control guidance unit (12) is adapted to connect the charging / discharging port of the discharging vehicle (40) and the control guidance port of the charging vehicle (50); A first voltage acquisition device (13) is adapted to connect to the charging / discharging port of the discharging vehicle (40) and / or the charging / discharging port of the charging vehicle (50), and the first voltage acquisition device (13) is used to acquire the charging voltage value. The control guidance unit (12) is used to generate a first control guidance signal for the charging vehicle (50), which can be adjusted according to the charging voltage value.

2. The charging and discharging connection device (10) according to claim 1, characterized in that, The control guidance unit (12) includes: A pulse width modulation generator (121) is provided, the first end of which is adapted to be connected to the charging and discharging port of the discharging vehicle (40), and the second end of which is adapted to be connected to the control guidance port of the charging vehicle (50). The pulse width modulation generator (121) is used to generate a first control guide signal in PWM form, the duty cycle of which can be adjusted according to the charging voltage value.

3. The charging and discharging connection device (10) according to claim 2, characterized in that, The control guidance unit (12) further includes: A voltage converter (122) is used to convert the first voltage signal output by the discharge vehicle (40) into a second voltage signal as a second control guidance signal for the charging vehicle (50).

4. The charging and discharging connection device (10) according to claim 3, characterized in that, The first end of the voltage converter (122) is adapted to be connected to the charging and discharging port of the discharge vehicle (40), and the second end of the voltage converter (122) is adapted to be connected to the first end of the pulse width modulation generator (121).

5. The charging / discharging connection device (10) according to claim 3, characterized in that, Also includes: The second voltage acquisition unit (14) is used to acquire the voltage value of the second control guidance signal; The control guidance unit (12) is configured to generate the first control guidance signal when the voltage value of the second control guidance signal reaches a preset voltage value.

6. The charging / discharging connection device (10) according to claim 5, characterized in that, The first end of the second voltage acquisition unit (14) is adapted to connect to the PE port of the discharge vehicle, and the second end of the second voltage acquisition unit (14) is adapted to connect to the control guidance port of the discharge vehicle.

7. The charging / discharging connection device (10) according to claim 5, characterized in that, Also includes: A first switching device (K1) is configured to connect its first end to the PE port of the discharge vehicle (40) and its second end to the first end of the second voltage collector (14).

8. The charging and discharging connection device (10) according to claim 1, characterized in that, Also includes: The second switching device (K2) has a first end adapted to be electrically connected to the first power supply terminal of the discharge vehicle (40) and a second end adapted to be electrically connected to the first power supply terminal of the charging vehicle (50). A third switching device (K3), the first end of which is adapted to be electrically connected to the second power supply terminal of the discharge vehicle (40), and the second end of which is adapted to be electrically connected to the second power supply terminal of the charging vehicle (50).

9. The charging and discharging connection device (10) according to claim 8, characterized in that, Also includes: The third voltage collector (15) has its first terminal electrically connected to the first terminal of the second switching device (K2), its second terminal electrically connected to the second terminal of the second switching device (K2), its third terminal electrically connected to the first terminal of the third switching device (K3), and its fourth terminal electrically connected to the second terminal of the third switching device (K3).

10. The charge / discharge connection device (10) according to any one of claims 1 to 9, characterized in that, Also includes: A controller (11) is electrically connected to the control guidance unit (12), and the controller (11) is used to adjust the first control guidance signal according to the charging voltage value.

11. The charge / discharge connection device (10) according to claim 10, characterized in that, Also includes: The fourth switching device (K4) has its first terminal electrically connected to the connection confirmation terminal of the discharge vehicle (40), and its second terminal electrically connected to the first terminal of the first resistor (R1). The first resistor (R1) has its second end electrically connected to the first end of the second resistor (R2); The second resistor (R2) has its second end electrically connected to the PE port of the discharge vehicle (40) and the PE port of the charging vehicle (50), respectively. The third resistor (R3) has its first end electrically connected to the connection confirmation terminal of the discharge vehicle (40), and its second end electrically connected to the first end of the first resistor (R1).

12. The charging and discharging connection device (10) according to claim 10, characterized in that, Also includes: The fourth resistor (R4) has its first end electrically connected to the PE port of the discharge vehicle (40) and the PE port of the charging vehicle (50), respectively, and its second end electrically connected to the connection confirmation terminal of the charging vehicle (50).

13. A charge / discharge connection assembly, characterized in that, include: The discharge gun head (20) is used to connect to the discharge vehicle (40); The charge-discharge connection device (10) as described in any one of claims 1-12 is connected to the discharge gun head (20).

14. The charge / discharge connection assembly according to claim 13, characterized in that, Also includes: A charging gun head (30) is used to connect to a charging vehicle (50); the charging gun head (30) is connected to the charging and discharging connection device (10).

15. A charging and discharging system, characterized in that, include: Charging vehicles and discharging vehicles; The charge / discharge connection assembly as described in claim 13 or 14.

16. A charge / discharge connection control method, applied to the charge / discharge connection device (10) according to any one of claims 1 to 12, characterized in that, include: Generate the first control guidance signal for the charging vehicle (50); The first control guidance signal is adjusted according to the charging voltage value.

17. The method according to claim 16, characterized in that, The first control guidance signal is a PWM signal, and adjusting the first control guidance signal according to the charging voltage value includes: When the charging voltage value is greater than the voltage threshold, the duty cycle of the first control guidance signal is increased to increase the discharge current value of the discharge vehicle (40).

18. The method according to claim 17, characterized in that, When the charging voltage value is greater than the voltage threshold, increasing the duty cycle of the first control guidance signal to increase the discharge current value of the discharge vehicle (40) includes: The charging voltage value is collected in each cycle; If the charging voltage value in the first cycle is greater than the voltage threshold, the duty cycle of the first control guidance signal in the first cycle is increased by a first preset value. If the charging voltage value in the second cycle is less than or equal to the voltage threshold, the duty cycle of the first control guide signal in the second cycle is adjusted to the duty cycle of the first control guide signal in the first cycle; the second cycle is later than the first cycle.

19. The method according to claim 16, characterized in that, The first control guidance signal is a PWM signal, and adjusting the first control guidance signal according to the charging voltage value includes: If the charging voltage value is less than or equal to the voltage threshold, the duty cycle of the first control guidance signal is reduced to reduce the discharge current value.

20. The method according to claim 19, characterized in that, When the charging voltage value is less than or equal to the voltage threshold, reducing the duty cycle of the first control guidance signal to reduce the discharge current value includes: The charging voltage value is collected in each cycle; If the charging voltage value in the first cycle is less than or equal to the voltage threshold, the duty cycle of the first control guidance signal in the first cycle is reduced by a second preset value. If the charging voltage value in the second cycle is greater than the voltage threshold, the duty cycle of the first control guidance signal in the second cycle is maintained; the second cycle is later than the first cycle.

21. The method according to any one of claims 16 to 20, characterized in that, The method further includes: The frequency of use of the duty cycle selected by the discharging vehicle (40) to discharge to the charging vehicle (50) for multiple historical periods is obtained. The duty cycle with the highest usage frequency is determined as the initial duty cycle.

22. A storage medium or program product, characterized in that, The program or instructions are used to implement the charge / discharge connection control method as described in any one of claims 16 to 21.

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