CN111555377A - An electric vehicle discharge system, discharge control method and electric vehicle - Google Patents

Abstract

The application discloses an electric vehicle discharging system, a discharging control method and an electric vehicle, wherein the electric vehicle discharging system comprises a charging and discharging module and a discharging device, the input end of the discharging device is connected to the charging and discharging module, and the output end of the discharging device is connected to a load or a vehicle to be charged; the charging and discharging module comprises a discharging control module, and the discharging control module is connected with a control guide signal output end of the discharging device and used for receiving a control guide signal sent by the discharging device and controlling the charging and discharging module to discharge outwards according to the control guide signal. According to the electric vehicle discharging system, the discharging control method and the electric vehicle, the discharging module is additionally arranged in the charging system of the electric vehicle, the discharging control module is arranged in the discharging module, the discharging control module and the discharging device are matched, a controllable discharging strategy for preventing misdischarge is formed, and meanwhile other unauthorized discharging guns can be prevented from being misused.

Description

An electric vehicle discharge system, discharge control method and electric vehicle

technical field

The invention relates to the field of electric vehicle charging and discharging, in particular to an electric vehicle discharge system, a discharge control method and an electric vehicle.

Background technique

With the popularization of new energy vehicles, in addition to converting external energy and charging the vehicle's power battery, the on-board charging system also has the ability to convert the rich energy of the power battery of the electric vehicle into alternating current to discharge outside the vehicle to charge other vehicles. Or used for loads such as household appliances.

However, the external discharge conditions of electric vehicles are complex and there are different modes of discharge. Due to the connection confirmation (CC, Connection Confirm) signal resistance range defined in the "Electric Vehicle Conductive Charging System" (national standard GB/T 18487, hereinafter referred to as the national standard) Limited, only the charging resistance range is defined in the national standard, and the discharging resistance is not defined. Therefore, each manufacturer has customized the discharging resistance without conflicting with the charging resistance, and the existing vehicle discharging system cannot be completely distinguished. Different discharge capacities (8A, 10A, 16A, 32A, 63A) and different discharge modes (V2V, Vehicle to Vehicle, V2L, Vehicle to Load).

The current automotive discharge systems on the market have the following problems:

1) The discharge mode and discharge capacity are completely distinguished by the CC resistance range. There are few combinations of discharges and the functions are not rich enough;

2) Due to the inconsistent range of CC resistance used for discharge defined by various manufacturers, and there is no other control strategy, it is easy to cause misuse, damage equipment and affect personal safety;

3) Plug in the discharge gun defined by the CC resistor within the V2L discharge range to discharge, which may cause the V2L discharge gun to remain electrified and endanger personal safety when it is not in use. It may also cause the V2V discharge gun to be mistaken for a V2L discharge gun, and Make the gun head on the charging end charged in advance (insert the V2V discharge gun, and the other end has not been inserted into the charging port of another vehicle that needs to be charged. The gun head is already charged, which may endanger personal safety), and the V2L discharge gun must be plugged and unplugged with electricity, which may damage the vehicle if it does not meet the national standard.

Therefore, the existing technology needs to be further improved.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present application is to overcome the deficiencies of the prior art, thereby providing an electric vehicle discharge system, a discharge control method and an electric vehicle, which realize the control of the discharge and can avoid the misuse of the discharge gun and the mis-discharge of the discharge gun .

In order to solve the above technical problems, in the first aspect, the present application discloses an electric vehicle discharge system, including a charging and discharging module and a discharging device, the input end of the discharging device is connected to the charging and discharging module, and the output of the discharging device is connected to the charging and discharging module. The terminal is connected to the load or the vehicle to be charged;

The charging and discharging module includes a discharging control module, which is connected to the control guiding signal output end of the discharging device, and is used for receiving the control guiding signal sent by the discharging device, and controlling the control and guiding signal according to the control guiding signal. The charging and discharging module discharges outward.

Optionally, the charging and discharging module further includes a connection confirmation signal detection module, configured to receive a connection confirmation signal sent by the discharge device, and determine the type of the discharge device according to the resistance value carried in the connection confirmation signal.

Optionally, the electric vehicle discharge system of the present application further includes a discharge mode selection module for a user to select a discharge mode.

Optionally, the discharge mode includes a vehicle-to-vehicle mode and a vehicle-to-load mode;

The discharge device corresponding to the vehicle-to-vehicle mode includes a vehicle-to-vehicle discharge gun;

The discharge device corresponding to the vehicle-to-load mode includes a vehicle-to-load discharge gun.

Optionally, the vehicle-to-load discharge gun is provided with a vehicle-to-load discharge gun switch and a discharge socket, and the discharge socket is used to connect the output end of the vehicle-to-load discharge gun to the load.

In a second aspect, the present application discloses an electric vehicle, including the electric vehicle discharge system as described above.

In a third aspect, the present application discloses a method for controlling the discharge of an electric vehicle, including any of the following:

If the type of the connected discharge device matches the discharge mode selected by the user, control the charging and discharging module to discharge outward according to the control guide signal of the discharge device;

or;

If the type of the connected discharge device does not match the discharge mode selected by the user, and within a preset time, the discharge device is connected to the load or the vehicle to be charged, and the charging and discharging module is controlled to outward according to the control guidance signal of the discharge device. discharge.

Optionally, if the type of the connected discharge device does not match the discharge mode selected by the user, and within a preset time, the discharge device is connected to the load or the vehicle to be charged, according to the control guide signal of the discharge device. Control the charging and discharging module to discharge outward, including:

If the connected discharge device is a vehicle-to-vehicle discharge gun, the discharge mode selected by the user is the vehicle-to-load mode, and the vehicle-to-vehicle discharge gun is connected to the vehicle to be charged within a preset time, according to the vehicle-to-vehicle The control guide signal of the discharge gun controls the charging and discharging module to discharge outward, and prompts the user that "discharge mode selection is wrong".

Optionally, if the type of the connected discharge device does not match the discharge mode selected by the user, and within a preset time, the discharge device is connected to the load or the vehicle to be charged, according to the control guide signal of the discharge device. Control the charging and discharging module to discharge outward, including:

If the connected discharge device is a vehicle-to-load discharge gun, the discharge mode selected by the user is the vehicle-to-vehicle mode, and the vehicle-to-load discharge gun is connected to the load within a preset time, according to the vehicle-to-load discharge gun The control guide signal controls the charging and discharging module to discharge outward, and prompts the user that "discharge mode selection is wrong".

Optionally, the electric vehicle discharge control method of the present application further includes:

If the type of the connected discharge device does not match the discharge mode selected by the user, and the discharge device is not connected to the load or the vehicle to be charged within a preset time, the electric vehicle discharge system is controlled to enter a sleep state.

By adopting the above technical solutions, the electric vehicle discharge system, the discharge control method and the electric vehicle of the present application have the following beneficial effects:

1) By adding a discharge module to the charging system of an electric vehicle, and the discharge module is provided with a discharge control module, through the cooperation of the discharge control module and the discharge device, a controllable discharge strategy to prevent mis-discharge is formed, and at the same time, it can prevent Misuse of other unauthorized discharge guns;

2) By adding a discharge mode selection module, the discharge mode can be distinguished by user selection;

3) By adding a car-to-load discharge gun switch, accidental discharge can be prevented.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic diagram of an optional electric vehicle discharge system according to an embodiment of the present application;

2 is a flowchart of an optional electric vehicle discharge control method according to an embodiment of the present application;

3 is a schematic diagram of the application of an optional electric vehicle discharge system in a V2V mode according to an embodiment of the present application;

4 is a schematic diagram of the application of an optional electric vehicle discharge system in a V2L mode according to an embodiment of the present application;

5 is a schematic diagram of the application of an optional electric vehicle discharge system in a V2L mode according to an embodiment of the present application;

FIG. 6 is a schematic diagram of the application of an optional electric vehicle discharge system in a V2L mode according to an embodiment of the present application

7 is a flowchart of an optional electric vehicle discharge control method according to an embodiment of the present application;

FIG. 8 is a flowchart of an optional electric vehicle discharge control method according to an embodiment of the present application.

The following supplementary descriptions are provided for the accompanying drawings:

1-charge and discharge module; 101-discharge control module; 102-connection confirmation signal detection module; 2-discharge device; 3-discharge vehicle interface.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Reference herein to "one embodiment" or "an embodiment" refers to a particular feature, structure, or characteristic that may be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", etc. are based on the orientations or positional relationships shown in the accompanying drawings, only for the purpose of It is convenient to describe the present invention and to simplify the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. Also, the terms "first," "second," etc. are used to distinguish between similar objects, and are not necessarily used to describe a particular order or precedence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein.

Referring to FIG. 1 , an embodiment of the present application provides a discharge system for an electric vehicle, including a charge and discharge module 1 and a discharge device 2 . The input end of the discharge device 2 is connected to the charge and discharge module through the discharge vehicle interface 3 , and the output of the discharge device 2 The terminal is connected to the load or the vehicle to be charged;

The charging and discharging module 1 includes a discharging control module 101, which is connected to the control pilot (CP, Control Pilot) signal output end of the discharging device 2, and is used for receiving the control pilot signal sent by the discharging device 2, and controlling the control pilot signal according to the control pilot signal. The charging and discharging module 1 discharges outward.

Specifically, the discharge control module 101 in FIG. 1 includes a control pilot signal generating module, a control pilot signal rechecking module and a first switch S1, and the control pilot signal generating module is configured to send a first control pilot signal with a first amplitude, The first control pilot signal is divided by the first resistor R1 and other resistors (resistors in the charging vehicle or the load, not shown in FIG. 1 ) to obtain a second control pilot signal with a second amplitude. The control pilot signal The back-checking module is used to detect the second control pilot signal, and the discharge control module 101 controls the charging and discharging module 1 to discharge outward according to the second control pilot signal.

As an optional implementation manner, the charging and discharging module 1 further includes a connection confirmation signal (CC, ConnectionConfirm) detection module, which is used for receiving the connection confirmation signal sent by the discharging device 2 and judging the discharge according to the resistance value carried in the connection confirmation signal. Type of device.

It should be noted that FIG. 1 also includes a charging control module composed of a first diode D1, a second switch S2, a second resistor R2, a third resistor R4 and a control pilot signal detection module, and the connection confirmation signal detection module is also It can be used to distinguish the charging gun from the discharging gun. The principle of charging will not be repeated here. Under normal circumstances, the first switch S1 is closed with the charging control module, so that the vehicle can be plugged into the charging gun at any time for charging. When the connection confirmation signal is detected When the module detects that the discharge gun is inserted, the first switch S1 and the discharge control module 101 are closed, and the discharge control module 101 controls the charge and discharge module 1 to discharge outward according to the control guidance signal.

In the embodiment of the present application, the discharge car interface, the charging gun, the discharge gun and the charging car are respectively provided with L1 (Live line 1, Live line 1), L2 (Live line 2, Live line 2), L3 (Live line 3, Live line 3), N ( Neutral line, Null line), PE (Protecting Earthing), CC and CP terminals, PE is the protective ground terminal, CC is the connection confirmation signal terminal, and CP is the control pilot signal terminal.

As an optional implementation manner, the electric vehicle discharge system of the embodiment of the present application further includes a discharge mode selection module, which is used for a user to select a discharge mode.

As an optional implementation manner, the discharge mode includes a vehicle-to-vehicle (V2V, Vehicle to Vehicle) mode and a vehicle-to-load (V2L, Vehicle to Load) mode;

The discharge device 2 corresponding to the vehicle-to-vehicle mode includes a vehicle-to-vehicle discharge gun;

The discharge device 2 corresponding to the vehicle-to-load mode includes a vehicle-to-load discharge gun.

As an optional embodiment, the vehicle-to-load discharge gun is provided with a vehicle-to-load discharge gun switch and a discharge socket, and the discharge socket is used to connect the output end of the vehicle-to-load discharge gun to the load.

The embodiments of the present application also provide an electric vehicle, including all the above-mentioned embodiments of the electric vehicle discharge system.

The embodiment of the present application also provides a discharge control method, as shown in FIG. 2 , the control method includes:

S1: determine whether the type of the connected discharge device matches the discharge mode selected by the user, if so, go to step S2; otherwise, go to step S3;

S2: control the charging and discharging module to discharge outward according to the control guidance signal of the discharging device;

S3: determine whether the discharge device is connected to the load or the vehicle to be charged within the preset time, and if so, go to step S4;

S4: Control the charging and discharging module to discharge outward according to the control guidance signal of the discharging device.

In an optional implementation manner, there are two cases of mismatch in step S1 in the embodiment of the present application:

In one case, the connected discharge device is a vehicle-to-vehicle discharge gun, the discharge mode selected by the user is a vehicle-to-load mode, and within a preset time, the vehicle-to-vehicle discharge gun is connected to the vehicle to be charged. The vehicle-to-vehicle discharge gun's control guidance signal controls the charging and discharging module to discharge outward, and prompts the user "wrong choice of discharge mode".

In another case, the connected discharge device is a vehicle-to-load discharge gun, the discharge mode selected by the user is a vehicle-to-vehicle mode, and within a preset time, the vehicle-to-load discharge gun is connected to the load, according to the The control guide signal from the car to the load discharge gun controls the charging and discharging module to discharge outward, and prompts the user that "the discharge mode is incorrectly selected".

In the two cases described above, although there is a state in which the type of the connected discharge device does not match the discharge mode selected by the user, it is described that the discharge device is connected to the load or the vehicle to be charged within a preset time. However, in a possible situation, the type of the connected discharge device does not match the discharge mode selected by the user, and within a preset time, the discharge device is not connected to the load or the vehicle to be charged , then control the electric vehicle discharge system to enter the sleep state.

As shown in FIG. 3, it is a schematic diagram of the application of an optional electric vehicle discharge system in the V2V mode according to the embodiment of the application; wherein, after the V2V discharge gun is inserted, the switch S1 is closed with the discharge control module of the discharge vehicle, and the control guide The signal generation module sends a 1Khz Pulse Width Modulation (PWM), and checks the frequency, duty cycle and amplitude of the PWM by controlling the pilot signal checkback circuit. The frequency and duty cycle returned by the checkback must be And the error sent out is within 10%, the amplitude must be 9V±1.5V or 6V±1.5V to be considered normal, otherwise it is judged as an abnormal situation, and charging and discharging are not allowed. In the specific implementation, the PWM amplitude sent by the control pilot signal generating circuit is nominally 12V, and the nominal PWM value returned by the recheck after voltage division by the resistor R1 of the discharging car and the resistor R3 of the charging car is 9V. After S2 is closed, the resistor R1 of the discharge car is divided by the resistance value of the resistor R3 of the charging car and the resistor R2 in parallel, and the nominal value of the PWM returned by the recheck is 6V. Therefore, when the PWM amplitude returned from the recheck is from When 9V jumps to 6V, it is considered that the charging car notifies the discharging car (acting as a charging pile) to discharge, and the discharging car can output energy to charge the car that needs to be charged.

As shown in FIG. 4 , it is a schematic diagram of the application of an optional electric vehicle discharge system in the V2L mode according to the embodiment of the application; wherein, the V2L discharge gun is provided with a discharge socket. Here, a three-phase socket is used as an example. The switch S1 is closed with the discharge control signal module, and the resistance R1 of the discharge car is divided by the resistance value of the resistance R3 of the V2L discharge gun in parallel with the resistance R2, and the nominal value of the PWM returned from the check is 6V. Therefore, with the cooperation of the discharge control signal module and the connection confirmation signal module, it can effectively prevent other charging guns from being mistaken for V2L discharge guns and prevent other unauthorized V2L guns from being misused.

As shown in FIG. 5 , it is a schematic diagram of the application of an optional electric vehicle discharge system in the V2L mode according to the embodiment of the application; the V2L discharge gun in FIG. 4 adds a switch S3, and switches S3-L1 connected in parallel with the switch S3 , switch S3-L2 and switch S3-L3, wherein, switch S3-L1, switch S3-L2 and switch S3-L3 are respectively set in the three jacks of three-phase socket L1/L2/L3, when the power plug of the load is inserted When the switch is opened due to the downward pressure of the pin, when the plug is pulled out, these switches will bounce up and disconnect. When the switch S1 of the discharge car is closed with the discharge control signal module, the switch S3 of the V2L discharge gun is closed, The resistor R1 of the discharge car is divided by the resistor R3 of the V2L discharge gun in parallel with the resistance value of the resistor R2. The nominal value of the PWM returned from the check is 6V, and the V2L discharge gun can discharge outward. In this scheme, the switch S3-L1, switches S3-L2 and switches S3-L3 can be omitted.

As shown in FIG. 6, it is a schematic diagram of the application of an optional electric vehicle discharge system in the V2L mode according to an embodiment of the present application; the switch S3-L1, the switch S3-L2 and the switch S3-L3 in FIG. 5 are connected in series with the switch S3 , when the switch S1 of the discharge car and the discharge control signal module are closed, the switch S3 of the V2L discharge gun is closed, and the power plug of the load is inserted into the three-phase socket, so that the switch S3-L1, the switch S3-L2 and the switch S3-L3 are closed, and the discharge The resistor R1 of the car and the resistor R3 of the V2L discharge gun are connected in parallel with the resistance value of the resistor R2 to divide the voltage. The nominal value of the PWM returned by the back check is 6V, and the V2L discharge gun can discharge outward.

Combining Figure 4/5/6, the solution in Figure 4 is the simplest and the lowest cost, but it can effectively prevent other charging guns from being mistaken for V2L discharge guns and prevent the misuse of other unauthorized V2L guns; Figure 5 The operation of manually turning on the switch by the user is added to further increase the safety, that is, the user needs to consciously turn on the switch on the V2L discharge gun to discharge; Figure 6 not only requires the user to actively turn on the switch on the basis of Figure 4, but also further increases the need for useful The electrical appliance can only be discharged when it is plugged in, which further increases safety. As shown in Figures 6 to 5 to 4, the security is weakened in turn, but the usability is increased in turn. Users can choose the discharge gun according to their most frequently used scenarios.

The definition range of the resistance Rc used to identify the gun head is shown in Table 1. The definition of the resistance and the resistance value used in Figure 1 and Figure 3 to Figure 6, except for the resistance Rc, follow the definition in the national standard;

Table 1:

As shown in FIG. 7 , it is a flowchart of an optional electric vehicle discharge control method according to an embodiment of the present application; when the user first inserts the gun head and then selects the discharge mode, if the inserted gun head is a charging gun, the charging cycle is entered. ;If the inserted gun head is a discharge gun, judge whether the type of the inserted discharge gun matches the discharge mode selected by the user; if it matches, discharge according to the discharge mode selected by the user until the end of the discharge, and the discharge system enters sleep according to the vehicle strategy If it does not match, it will discharge according to the discharge mode selected by the user and prompt the user "discharge mode selection error". After the discharge is completed, the discharge system will enter the sleep state according to the vehicle strategy. Among them, the matching result of the discharge gun type and the discharge mode selected by the user specifically includes the following situations:

(1) Insert the V2V discharge gun and select the V2V mode. The discharge control module of the discharge car will continue to send PWM signals and wait for the charging car to connect. If the PWM signal of the back check jumps from 9V to 6V, it means that the charging car has Connected, the discharge control module of the discharge car continues to send PWM signals, and the discharge car discharges in V2V mode. If the PWM signal of the back-checking jumps from 6V to 9V during the discharge process, the discharge system enters the sleep state according to the vehicle strategy; if charging If the vehicle connection times out (waiting time is 3 minutes), the discharge system will enter the sleep state according to the whole vehicle strategy; if the PWM signal of the back check continues to be 9V and the waiting time does not expire, it will continue to wait for the connection of the charging vehicle.

(2) Insert the V2V discharge gun and select the V2L mode. The discharge control module of the discharge car will continue to send the PWM signal and wait for the load to be connected. If the PWM signal of the back check jumps from 9V to 6V, it means that the load is connected. The discharge control module of the discharge car continues to send PWM signals, the discharge car discharges in the V2L mode, and prompts the user "discharge mode selection error". The vehicle strategy enters the sleep state; if the load connection times out (waiting time is 3 minutes), the discharge system enters the sleep state according to the vehicle strategy; if the PWM signal of the back check continues to be 9V and the wait does not time out, it continues to wait for the load connection.

(3) Insert the V2L discharge gun and select the V2L mode. The discharge control module of the discharge car will continue to send the PWM signal and wait for the load to be connected. If the PWM signal of the back check jumps from 9V to 6V, it means that the load is connected. The discharge control module of the discharge car continues to send PWM signals, and the discharge car discharges in the V2L mode. If the PWM signal of the back-check jumps from 6V to 9V during the discharge process, the discharge system enters the sleep state according to the vehicle strategy; if the load connection times out (Waiting time is 3 minutes), the discharge system enters the sleep state according to the vehicle strategy; if the PWM signal of the back check continues to be 9V and the wait does not time out, it continues to wait for the load to be connected.

(4) Insert the V2L discharge gun and select the V2V mode. The discharge control module of the discharge car will continue to send PWM signals and wait for the connection of the charging car. If the PWM signal of the back check jumps from 9V to 6V, it means that the charging car has Connected, the discharge control module of the discharge car continues to send PWM signals, the discharge car discharges in V2V mode, and prompts the user "discharge mode selection error". Enter the sleep state according to the vehicle strategy; if the charging vehicle connection times out (waiting time of 3 minutes), the discharge system enters the sleep state according to the vehicle strategy; if the PWM signal of the back-check continues to be 9V and the wait does not time out, it will continue to wait for the charging vehicle to connect. .

As shown in FIG. 8 , it is a flowchart of an optional electric vehicle discharge control method according to an embodiment of the present application; when the user first selects the discharge mode and then inserts the gun head, if the plug head is a charging gun, the discharge system will The whole vehicle strategy enters the dormant state; if the inserted gun head is a discharge gun, it is judged whether the type of the inserted discharge gun matches the discharge mode selected by the user; Enter the sleep state according to the vehicle strategy; if it does not match, discharge according to the discharge mode selected by the user and prompt the user "discharge mode selection error". After the discharge is completed, the discharge system enters the sleep state according to the vehicle strategy. The matching result between the discharge gun type and the discharge mode selected by the user specifically includes four cases, which may refer to the above-mentioned four cases, and will not be repeated here.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. An electric vehicle discharge system, characterized in that it comprises a charging and discharging module and a discharging device, an input end of the discharging device is connected to the charging and discharging module, and an output end of the discharging device is connected to a load or a vehicle to be charged ; The charging and discharging module includes a discharging control module, which is connected to the control guiding signal output end of the discharging device, and is used for receiving the control guiding signal sent by the discharging device, and controlling the control and guiding signal according to the control guiding signal. The charging and discharging module discharges outward. 2 . The electric vehicle discharging system according to claim 1 , wherein the charging and discharging module further comprises a connection confirmation signal detection module, which is used for receiving the connection confirmation signal sent by the discharging device, and according to the connection confirmation signal. 3 . The resistance value carried in the signal determines the type of the discharge device. 3 . The electric vehicle discharge system according to claim 1 , further comprising a discharge mode selection module for a user to select a discharge mode. 4 . 4. The electric vehicle discharge system according to claim 3, wherein the discharge mode comprises a vehicle-to-vehicle mode and a vehicle-to-load mode; The discharge device corresponding to the vehicle-to-vehicle mode includes a vehicle-to-vehicle discharge gun; The discharge device corresponding to the vehicle-to-load mode includes a vehicle-to-load discharge gun. 5 . The electric vehicle discharge system according to claim 4 , wherein the vehicle-to-load discharge gun is provided with a vehicle-to-load discharge gun switch and a discharge socket, and the discharge socket is used for the vehicle-to-load discharge. 6 . The output of the discharge gun is connected to the load. 6. An electric vehicle, characterized by comprising the electric vehicle discharge system according to any one of claims 1 to 5. 7. An electric vehicle discharge control method, characterized in that, comprising any of the following: If the type of the connected discharge device matches the discharge mode selected by the user, control the charging and discharging module to discharge outward according to the control guide signal of the discharge device; or; If the type of the connected discharge device does not match the discharge mode selected by the user, and within a preset time, the discharge device is connected to the load or the vehicle to be charged, and the charging and discharging module is controlled to outward according to the control guidance signal of the discharge device. discharge. 8 . The electric vehicle discharge control method according to claim 7 , wherein if the type of the connected discharge device does not match the discharge mode selected by the user, and within a preset time, the discharge device is connected to The load or the vehicle to be charged controls the charging and discharging module to discharge outward according to the control guidance signal of the discharging device, including: If the connected discharge device is a vehicle-to-vehicle discharge gun, the discharge mode selected by the user is the vehicle-to-load mode, and the vehicle-to-vehicle discharge gun is connected to the vehicle to be charged within a preset time, according to the vehicle-to-vehicle The control guide signal of the discharge gun controls the charging and discharging module to discharge outward, and prompts the user that "discharge mode selection is wrong". 9 . The electric vehicle discharge control method according to claim 7 , wherein if the type of the connected discharge device does not match the discharge mode selected by the user, and within a preset time, the discharge device is connected to The load or the vehicle to be charged controls the charging and discharging module to discharge outward according to the control guidance signal of the discharging device, including: If the connected discharge device is a vehicle-to-load discharge gun, the discharge mode selected by the user is the vehicle-to-vehicle mode, and the vehicle-to-load discharge gun is connected to the load within a preset time, according to the vehicle-to-load discharge gun The control guide signal controls the charging and discharging module to discharge outward, and prompts the user that "discharge mode selection is wrong". 10. The electric vehicle discharge control method according to claim 7, further comprising: If the type of the connected discharge device does not match the discharge mode selected by the user, and the discharge device is not connected to the load or the vehicle to be charged within a preset time, the electric vehicle discharge system is controlled to enter a sleep state.

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