External discharge control strategy, external discharge control system and vehicle

Abstract

The invention discloses an external discharge control strategy, an external discharge control system and a vehicle. The external discharge control strategy comprises the following steps that the SOC value of a battery, the temperature value of an exhaust pipe and the external discharge power value are continuously obtained; and according to the obtained SOC value of the battery, the temperature value of the exhaust pipe and the external discharge power value, the battery and / or the range extender are selected to supply energy, and whether the external discharge power needs to be reduced or limited is selected. The temperature value of the exhaust pipe serves as a reference index for judging whether the range extender can supply energy outwards or not, so that the situation that heat radiated to a battery is increased due to the fact that the temperature of the exhaust pipe is too high can be avoided, thermal protection is conducted on the battery, and thermal damage of the exhaust pipe of the range extender to a vehicle is reduced; and under a specific condition, the external discharge power is reduced or limited, so that the battery can be further protected under the precondition of meeting user requirements as much as possible, and the service life of the battery is prolonged.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of new energy vehicles, and particularly relates to an external discharging control strategy, an external discharging control system and a vehicle. BACKGROUND

[0002] At present, many new energy vehicles have the function of external discharging, that is, the vehicle can discharge as an energy storage device in the parking mode. For a new energy vehicle with a range extender, the range extender and / or the battery can be used for discharging when discharging externally, but in the parking state, the range extender is in the starting state, and the heat at the exhaust pipe will gather. The battery of the new energy vehicle is also integrated on the chassis, so the heat of the exhaust pipe will radiate to the surrounding, thereby causing the temperature of the battery to rise and increasing the heat dissipation load of the battery, which will affect the use safety and service life of the battery.

[0003] At present, the selection of the energy supply mode of the new energy vehicle with the range extender is mostly based on the SOC value of the battery as a judgment index, for example, when the SOC value of the battery is high, the battery is used for independent external discharging, and when the SOC value of the battery is low, the battery and the range extender are used for cooperative external discharging. However, the adverse effects of heat gathering at the exhaust pipe on the battery are ignored. SUMMARY

[0004] In order to solve the above technical problems, one of the purposes of the present application is to provide an external discharging control strategy which can avoid the heat radiation of the exhaust pipe to affect the safe operation of the battery.

[0005] In order to achieve the above purpose, the technical scheme of the present application is as follows: an external discharging control strategy, comprising the following steps: continuously obtaining the SOC value of the battery, the temperature value of the exhaust pipe and the external discharging power value; selecting the energy supply of the battery and / or the range extender according to the obtained SOC value of the battery, the temperature value of the exhaust pipe and the external discharging power value, and selecting whether to need to down-regulate or limit the external discharging power.

[0006] The beneficial effects of the above technical scheme of the present application are that by taking the temperature value of the exhaust pipe as a reference index for whether the range extender can supply energy externally, the heat radiation to the battery caused by the exhaust pipe due to the excessively high temperature can be avoided, thereby protecting the battery from heat and reducing the thermal damage of the exhaust pipe of the range extender to the vehicle. In specific cases, by down-regulating or limiting the external discharging power, the battery can be further protected to prolong the service life of the battery on the premise of meeting the user's demand as much as possible.

[0007] On the basis of the above technical scheme, the present application can be further improved as follows: Further, when the SOC value of the battery is less than or equal to a set SOC low threshold value, and the temperature value of the exhaust pipe is less than a set start temperature threshold value, the range extender is started to operate at a set operating power, and according to the size of the external discharge power value, it is selected whether to complete the external discharge independently by the range extender or to complete the external discharge by the range extender and the battery in cooperation, and according to the size of the SOC value of the battery, it is selected whether to need to reduce the external discharge power; When the temperature value of the exhaust pipe is greater than a set close temperature threshold value, or the SOC value of the battery is greater than the SOC low threshold value, the range extender is closed, the external discharge is completed independently by the battery, and according to the size of the SOC value of the battery, it is selected whether to need to limit the external discharge power.

[0008] The beneficial effects of the above further technical solutions are that: in this way, the range extender is started to perform external discharge only when the SOC value of the battery is less than or equal to a set SOC low threshold value, and the temperature value of the exhaust pipe is less than a set start temperature threshold value, and according to the size of the external discharge power value, it is selected whether to complete the external discharge independently by the range extender or to complete the external discharge by the range extender and the battery in cooperation, and according to the size of the SOC value of the battery, it is selected whether to need to reduce the external discharge power; and when the temperature value of the exhaust pipe is greater than a set close temperature threshold value, or the SOC value of the battery is greater than the SOC low threshold value, the range extender is closed, the external discharge is completed independently by the battery, and according to the size of the SOC value of the battery, it is selected whether to need to limit the external discharge power.

[0009] Further, the difference between the close temperature threshold value and the start temperature threshold value is not less than 5℃.

[0010] The beneficial effects of the above further technical solutions are that: by respectively setting the close temperature threshold value and the start temperature threshold value, there is a certain difference between the start temperature and the close temperature of the range extender, avoiding high-frequency start and close of the range extender.

[0011] Further, when the range extender is in the closed state, and the SOC value of the battery is less than a set SOC extremely low threshold value, the external discharge power is limited to not more than a set minimum external discharge power; Otherwise, the original external discharge power is maintained.

[0012] The beneficial effects of the above further technical solutions are that: when the range extender is in the closed state, the external discharge is completed independently by the battery, but if the battery is in the SOC extremely low threshold value, the battery power is low at this time, in order to avoid the vehicle from shutting down by itself, the external discharge power can only be limited to not more than a set minimum external discharge power to meet the most basic power needs of external discharge.

[0013] Furthermore, the extremely low SOC threshold is 8-12%.

[0014] The beneficial effect of the above-mentioned further technical solution is that: the SOC threshold is set to 8-12%, which allows it to operate for a period of time without exceeding the minimum external discharge power, so as to reserve sufficient time for the exhaust pipe to cool down, while minimizing damage to the battery.

[0015] Furthermore, when the range extender is in the start-up state, if the SOC value of the battery is less than the set low SOC threshold, the external discharge power is reduced to not exceed the set operating power of the range extender. Otherwise, maintain the original external discharge power.

[0016] The beneficial effect of the above-mentioned further technical solution is that, in the operation of the range extender, when the SOC value of the battery is less than the low threshold of SOC, the external discharge power value is limited to not exceeding the set operating power, regardless of the external discharge power value, so that the range extender can independently discharge externally.

[0017] Furthermore, when the range extender is in the start-up state, if the external discharge power is greater than the set operating power of the range extender, the range extender and the battery work together to complete the external discharge; Otherwise, the range extender will independently complete the external discharge.

[0018] The beneficial effect of the above-mentioned further technical solution is that, in the start-up state, if the range extender's power supply is insufficient to meet the external discharge demand, the battery will supplement the power supply; if the range extender can meet the external discharge demand on its own, the range extender will supply power independently.

[0019] Furthermore, when the range extender independently completes external discharge, and the external discharge power value is less than the set operating power of the range extender, the remaining power of the range extender charges the battery.

[0020] The beneficial effect of the above-mentioned further technical solution is that it enables the range extender to always operate at the set operating power when it is started, and its excess power is used to charge the battery, thereby improving energy utilization efficiency.

[0021] The second objective of this invention is to provide an external discharge control system with a simple structure that can execute the external discharge control strategy described above.

[0022] To achieve the above objectives, another technical solution of the present invention is as follows: an external discharge control system for executing the external discharge control strategy as described above, comprising a control module and a power acquisition module, a temperature acquisition module, and a power acquisition module electrically connected thereto. The power acquisition module is used to acquire the external discharge power value, the temperature acquisition module is used to acquire the temperature value of the exhaust pipe of the range extender, and the power acquisition module is used to acquire the SOC value of the battery. The control module formulates an external discharge strategy based on the acquired battery SOC value, exhaust pipe temperature value, and external discharge power value, and controls the battery and / or range extender to operate according to the formulated external discharge strategy.

[0023] The beneficial effects of the above technical solution of the present invention are as follows: the external discharge control system can obtain the SOC value of the battery, the temperature value of the exhaust pipe and the external discharge power value by the power acquisition module, the temperature acquisition module and the power acquisition module respectively. The judgment module formulates an external discharge strategy based on the obtained battery SOC value, exhaust pipe temperature value and external discharge power value, and the control module controls the battery and / or range extender to operate according to the formulated external discharge strategy.

[0024] The third objective of this invention is to provide a vehicle that can reduce thermal damage when discharging externally.

[0025] To achieve the above objectives, another technical solution of the present invention is as follows: a vehicle for executing the external discharge control strategy as described above or including the external discharge control system as described above.

[0026] The beneficial effects of the above-mentioned technical solution of the present invention are as follows: when the vehicle discharges to the outside, it can select the power supply mode by comprehensively considering the SOC value of the battery, the temperature value of the exhaust pipe and the external discharge power value, so as to reduce the thermal damage of the exhaust pipe to the battery, while providing reasonable power protection for the battery, and also preventing the vehicle from shutting off automatically when the power is low. Attached Figure Description

[0027] Figure 1 This is one of the flowcharts illustrating the external discharge control strategy described in Embodiment 1 of the present invention; Figure 2 This is a second schematic diagram of the external discharge control strategy described in Embodiment 1 of the present invention; Figure 3 This is a topology diagram of the external discharge control strategy described in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the external discharge control system described in Embodiment 2 of the present invention. Detailed Implementation

[0028] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0030] It is understood that spatial relation terms such as “below,” “under,” “below,” “below,” “above,” “above,” etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as “below,” “below,” or “below” will be oriented “above” the other element or feature. Therefore, the exemplary terms “below” and “under” can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0031] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0032] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0033] Example 1 like Figure 1As shown, this embodiment provides an external discharge control strategy that continuously acquires the battery's SOC value, exhaust pipe temperature, and external discharge power. Based on these values, it selects whether the battery and / or range extender will provide power, and determines whether to reduce or limit the external discharge power. By using the exhaust pipe temperature as a reference indicator for whether the range extender can provide external power, it avoids excessive heat radiated from the exhaust pipe to the battery, thus protecting the battery from thermal damage and reducing the thermal impact of the range extender's exhaust pipe on the vehicle. In specific situations, by reducing or limiting the external discharge power, it further protects the battery while meeting user needs as much as possible, thereby extending battery life.

[0034] like Figure 2 As shown, in this embodiment, when the SOC value of the battery is less than or equal to the set low SOC threshold, and the temperature value of the exhaust pipe is less than the set start-up temperature threshold, the range extender is started and operates at the set operating power. The range extender is then selected to independently complete the external discharge, or the range extender and battery work together to complete the external discharge, depending on the magnitude of the external discharge power. The external discharge power is then adjusted based on the battery's SOC value. When the temperature value of the exhaust pipe is greater than the set shut-off temperature threshold, or the battery's SOC value is greater than the low SOC threshold, the range extender is shut off, and the battery independently completes the external discharge. The external discharge power is then adjusted based on the battery's SOC value. This ensures that the range extender will only start discharging externally when the battery's SOC value is less than or equal to a set low SOC threshold and the exhaust pipe temperature is less than a set start-up temperature threshold. The range extender will then either discharge independently or in conjunction with the battery, depending on the discharge power value. Furthermore, the range extender's discharge power will be adjusted based on the battery's SOC value. Conversely, when the exhaust pipe temperature exceeds a set shut-off temperature threshold or the battery's SOC value exceeds the low SOC threshold, the range extender will be shut off, and the battery will discharge externally independently. The range extender's discharge power will be limited based on the battery's SOC value.

[0035] Preferably, in this embodiment, the difference between the shutdown temperature threshold and the startup temperature threshold is not less than 5°C. By setting the shutdown temperature threshold and the startup temperature threshold separately, a certain difference exists between the startup temperature and the shutdown temperature of the range extender, thus avoiding high-frequency startup and shutdown of the range extender.

[0036] like Figure 3As shown, in this embodiment, when the range extender is in the off state and the battery's SOC value is less than a set extremely low SOC threshold, the external discharge power is limited to no more than a set minimum external discharge power; otherwise, the original external discharge power is maintained. The minimum external discharge power is less than the range extender's set operating power. Since the battery independently discharges when the range extender is off, but if the battery is at an extremely low SOC threshold, its charge is low. To prevent the vehicle from automatically shutting off, the external discharge power is limited to no more than the set minimum external discharge power to meet the basic power requirements for external discharge.

[0037] In this embodiment, the extremely low SOC threshold is 8-12% (which can be any value among 8%, 9%, 10%, 11%, and 12%, or any range between any two values). Setting the extremely low SOC threshold to 8-12% allows the battery to operate for a period of time while maintaining the minimum external discharge power, providing sufficient time for the exhaust pipe to cool down, and minimizing damage to the battery as much as possible.

[0038] like Figure 3 As shown, in this embodiment, when the range extender is in the start-up state and the battery's SOC value is less than a set low-to-medium threshold, the external discharge power is reduced to not exceed the range extender's set operating power; otherwise, the original external discharge power is maintained. This ensures that when the battery's SOC value is less than the low-to-medium threshold while the range extender is running, regardless of the external discharge power value, it is limited to not exceed the set operating power, allowing the range extender to independently discharge externally.

[0039] like Figure 3 As shown, in this embodiment, when the range extender is in the start-up state, if the external discharge power is greater than the set operating power of the range extender, the range extender and the battery work together to complete the external discharge; otherwise, the range extender completes the external discharge independently. This ensures that if the range extender's power supply is insufficient to meet the external discharge demand when in the start-up state, the battery provides supplementary power; if the range extender can meet the external discharge demand on its own, the range extender provides power independently.

[0040] like Figure 3As shown, in this embodiment, when the range extender independently completes external discharge, and the external discharge power is less than the set operating power of the range extender, the remaining power of the range extender is used to charge the battery (e.g., if the external discharge power is 5kW and the set operating power of the range extender is 6kW, the range extender will have 1kW of remaining power, which is used to charge the battery. This achieves full utilization of energy and prevents the battery from becoming too low, thus affecting its service life). This allows the range extender to always operate at the set operating power during startup, with its excess power used to charge the battery, thereby improving energy utilization efficiency.

[0041] In this embodiment, the SOC low threshold > SOC medium low threshold > SOC very low threshold. In this embodiment, the shutdown temperature threshold and the startup temperature threshold are both above zero temperature values, and the shutdown temperature threshold > the startup temperature threshold. The minimum external discharge power < the set operating power.

[0042] In this embodiment, the extremely low SOC threshold and the minimum external discharge power can be preset by the system and cannot be changed (of course, it is also possible to allow for personalized settings within a certain range, but the premise is that the battery cannot be over-discharged). The low SOC threshold and the medium-low SOC threshold can both be personalized by the user through the vehicle's central control screen (but the premise must be that the low SOC threshold > the medium-low SOC threshold > the extremely low SOC threshold). For example, the extremely low SOC threshold can be set to 10%, 15%, or 20%, the low SOC threshold can be set to 20%, 30%, 40%, or 50%, and the medium-low SOC threshold can be set to 15%, 25%, 35%, or 45%, etc., and of course, it is not limited to these.

[0043] For range extenders, the operating power can also be set to multiple power versions to choose from, such as high power mode (8kW), medium power mode (7kW) and low power mode (output power is kept at 6kW) to balance fuel consumption and meet different personalized needs, similar to the current driving conditions (sport mode, normal mode and economy mode).

[0044] In this embodiment, the minimum external discharge power can be preset by the system or customized by the user through the vehicle's central control screen. Specifically, it can be set to 200W, 500W, or 1kW, and of course, it is not limited to these.

[0045] In this embodiment, the shutdown temperature threshold is greater than the startup temperature threshold. The shutdown stability threshold can be preset by the system, while the startup temperature threshold can be set manually through the vehicle's central control screen (but must meet the prerequisite that the shutdown temperature threshold is greater than the startup temperature threshold). For example, the startup temperature threshold can be set to 90°C, and the shutdown temperature threshold can be set to 100°C, but it is not limited to these.

[0046] Since the vehicle is in a parking brake state when discharging externally, this external discharge control strategy only applies to the state when the vehicle is discharging externally. When the vehicle is in driving mode, its power supply strategy is set separately.

[0047] like Figure 3 As shown, this embodiment has four power supply modes for external discharge, which correspond to... Figure 3 In the diagram, A, B, C, and D represent different battery configurations. A corresponds to the battery independently discharging to the outside world according to its external power value (unlimited power). B corresponds to the battery and range extender working together to discharge to the outside world (power exceeding the set operating power). C corresponds to the range extender independently discharging to the outside world (power not exceeding the set operating power). D corresponds to the battery independently operating at a power not exceeding the minimum external discharge power (power not exceeding the minimum external discharge power).

[0048] In this embodiment, only mode C may have residual power for charging the battery. During this process, the battery's SOC value may rise above the low SOC threshold. At this point, it is continuously determined whether the battery's SOC value is greater than the low SOC threshold. Once the low SOC threshold is exceeded, the battery resumes independent external discharge (i.e., repeats the process as described above). Figure 3 The entire process).

[0049] like Figure 3 As shown, in this embodiment, under the mode corresponding to D, the temperature of the exhaust pipe gradually cools down during this process. When the temperature of the exhaust pipe drops to the starting temperature threshold, the range extender starts emergency recovery operation (therefore, under the power supply mode corresponding to D, the temperature value of the exhaust pipe can be continuously obtained to see if it is lower than the starting temperature threshold).

[0050] like Figure 3 As shown, in this embodiment, when operating in mode A, the battery's SOC value may drop to below or below the SOC low threshold, and the exhaust pipe temperature may drop below the start-up temperature threshold. Therefore, in power supply mode A, the operation can be continuously repeated as described above. Figure 3The entire process (i.e., continuously acquiring the battery's SOC value to determine whether the battery's SOC value is greater than the SOC low threshold and less than the SOC extremely low threshold; ① if it is less than the SOC extremely low threshold, then directly limit the external discharge power to no more than the minimum external discharge power; ② if it is greater than the SOC low threshold, then maintain the status quo; ③ if it is not greater than the SOC low threshold, but the exhaust pipe temperature is lower than the start-up temperature threshold, then immediately start the range extender; otherwise, maintain the status quo).

[0051] The external discharge control strategy provided in this embodiment has the following characteristics: 1. Safety Assurance: By monitoring the temperature of the exhaust pipe, it proactively prevents heat radiation from damaging the battery; 2. Stable power supply: The use of hybrid power supply (range extender and battery working together) solves the problem of power interruption caused by load fluctuations or insufficient power; 3. Ensure continuous power output over a long period of time: The smooth transition from "full power (operating at the original external discharge power value) → limited power (limiting the external discharge power value to not exceed the set operating power) → minimum power (external discharge power value not exceeding the minimum external discharge power)" ensures that users have emergency power even in extreme situations (battery power is about to be depleted and exhaust pipe is overheated). 4. Higher energy efficiency and system economy: Power distribution and recovery charging strategies balance fuel consumption and electricity consumption, extending the power supply time of a single external discharge. 5. Preventive protection for the range extender and battery: significantly reduces system failure rate and long-term maintenance costs; 6. Personalized external discharge management: The power supply mode and reason for external discharge can be displayed or viewed through the central control screen or instrument panel. In addition, relevant parameters for external discharge can be manually set through the central control screen.

[0052] Example 2 like Figure 4As shown, this embodiment provides an external discharge control system for executing the external discharge control strategy described in Embodiment 1. The system includes a control module and electrically connected power acquisition module, temperature acquisition module, and power acquisition module. The power acquisition module acquires the external discharge power value (which can be directly obtained from the vehicle's ECU). The temperature acquisition module acquires the temperature value of the range extender's exhaust pipe (a temperature sensor can be directly installed on or near the exhaust pipe to acquire the exhaust pipe temperature). The power acquisition module acquires the battery's SOC value (which can be directly obtained from the battery's battery management system). The control module formulates an external discharge strategy based on the acquired battery SOC value, exhaust pipe temperature value, and external discharge power value, and controls the battery and / or range extender to operate according to the formulated external discharge strategy.

[0053] In this embodiment, the control module can be the vehicle's ECU (engine control unit).

[0054] Example 3 This embodiment provides a vehicle for implementing the external discharge control strategy as described in Embodiment 1 or including the external discharge control system as described in Embodiment 2. When discharging externally, the vehicle can select the power supply mode by comprehensively considering the battery's SOC value, the exhaust pipe temperature, and the external discharge power value. This reduces thermal damage to the battery from the exhaust pipe, provides reasonable battery charge protection, and prevents the vehicle from automatically shutting off when the battery is low.

[0055] The vehicle described in this embodiment can be a range-extended hybrid vehicle or a plug-in hybrid vehicle (specifically, it can be a passenger car or a commercial vehicle, especially applicable to passenger cars).

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An external discharge control strategy, characterized in that, Includes the following steps: Continuously acquire the battery's SOC value, exhaust pipe temperature value, and external discharge power value; Based on the obtained battery SOC value, exhaust pipe temperature value, and external discharge power value, select whether to power the battery and / or range extender, and select whether to reduce or limit the external discharge power.

2. The external discharge control strategy according to claim 1, characterized in that, When the SOC value of the battery is less than or equal to the set low SOC threshold, and the temperature value of the exhaust pipe is less than the set start-up temperature threshold, the range extender is started and runs at the set operating power. Depending on the magnitude of the external discharge power value, it is selected whether the external discharge is completed independently by the range extender or by the range extender and the battery working together to complete the external discharge. Depending on the magnitude of the SOC value of the battery, it is selected whether the external discharge power needs to be reduced. When the temperature of the exhaust pipe is greater than the set shut-off temperature threshold, or when the SOC value of the battery is greater than the low SOC threshold, the range extender is shut down, and the battery independently discharges to the outside. The power of external discharge is then limited based on the SOC value of the battery.

3. The external discharge control strategy according to claim 2, characterized in that, The difference between the shutdown temperature threshold and the startup temperature threshold is not less than 5°C.

4. The external discharge control strategy according to claim 2, characterized in that, When the range extender is in the off state and the SOC value of the battery is less than the set SOC extremely low threshold, the external discharge power will be limited to no more than the set minimum external discharge power. Otherwise, maintain the original external discharge power.

5. The external discharge control strategy according to claim 2, characterized in that, The extremely low threshold for SOC is 8-12%.

6. The external discharge control strategy according to claim 2, characterized in that, When the range extender is in the start-up state, if the SOC value of the battery is less than the set low SOC threshold, the external discharge power is reduced to not exceed the set operating power of the range extender. Otherwise, maintain the original external discharge power.

7. The external discharge control strategy according to claim 2, characterized in that, When the range extender is in the start-up state, if the external discharge power is greater than the set operating power of the range extender, the range extender and the battery work together to complete the external discharge. Otherwise, the range extender will independently complete the external discharge.

8. The external discharge control strategy according to any one of claims 1-7, characterized in that, When the range extender completes its external discharge independently, if the range extender has residual power, the residual power will be used to charge the battery.

9. An external discharge control system for implementing the external discharge control strategy as described in any one of claims 1-8, characterized in that, The system includes a control module and power acquisition module, temperature acquisition module, and power acquisition module electrically connected to it. The power acquisition module is used to acquire the external discharge power value, the temperature acquisition module is used to acquire the temperature value of the exhaust pipe of the range extender, and the power acquisition module is used to acquire the SOC value of the battery. The control module formulates an external discharge strategy based on the acquired battery SOC value, exhaust pipe temperature value, and external discharge power value, and controls the battery and / or range extender to operate according to the formulated external discharge strategy.

10. A vehicle, characterized in that, Used to implement the external discharge control strategy as described in any one of claims 1-8 or including the external discharge control system as described in claim 9.

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