Constant-temperature cabin control method and system of new energy automobile

Abstract

The invention discloses a constant-temperature cabin control method of a new energy automobile, and belongs to the field of new energy automobiles. The method comprises the steps that in a power-on and power-off period, overheating protection setting items of a constant-temperature cabin are selected and started and fed back to a vehicle-mounted large screen at the same time, and the setting items comprise an AC mode and an AC-free mode; according to the environment temperature and the vehicle state, the function state which the selected setting item is about to enter is judged, and the function state comprises a function maintaining state and a function quitting state. Meanwhile, the invention further provides a constant-temperature cabin control system of the new energy automobile according to the method. Intelligent constant-temperature control of the automobile cabin is achieved, overheating caused by long-time parking of the automobile in a high-temperature environment is prevented, and therefore a more comfortable cabin environment is provided for a user.

Description

Technical Field

[0001] The present invention belongs to the field of new energy vehicles, and in particular, relates to a method and system for controlling a constant temperature cabin of a new energy vehicle. Background Art

[0002] When a user parks a vehicle for a long time in summer or exposes it to the sun, the temperature inside the vehicle will accumulate and cause a series of adverse effects, including:

[0003] 1) Accelerated aging of interior decoration: High temperature will accelerate the oxidation and aging process of interior decoration materials, especially leather and plastic, causing cracks, fading or deformation in seats, dashboards, door panels and other parts, affecting the appearance and service life.

[0004] 2) Odor generation: Under high temperature, the volatilization of chemical substances in the enclosed space of the car is accelerated. For example, the glue and plastic in the interior materials release harmful gases, which produce pungent odors, affect the air quality in the car, and pose a potential threat to the health of the passengers.

[0005] 3) Driving safety risks: High temperatures may cause inflammable and explosive items in the car, such as lighters and perfume bottles, to explode, increasing safety risks. At the same time, overheated seats and steering wheels may affect the driver's comfort and operating sensitivity, indirectly affecting driving safety.

[0006] 4) Electronic equipment failure: In-vehicle electronic equipment such as the central control screen and audio system work at high temperatures and may fail or degrade in performance due to overheating, affecting the user experience and the reliability of vehicle functions.

[0007] 5) Increased energy consumption: When the vehicle is started again, in order to quickly lower the temperature inside the vehicle, the air conditioning system needs to run for a long time and at a high intensity. This not only consumes more energy and increases operating costs, but may also cause additional burden on the air conditioning system itself and shorten its service life.

[0008] Relying on existing remote air conditioning and other functions has not completely solved the pain points. The method of remotely turning on the air conditioning before the customer uses the car next time requires a clear plan for the use of the car, and it cannot solve the problem of vehicle damage caused by excessive temperature in the car during parking. Summary of the invention

[0009] The present invention aims to overcome the deficiencies of the prior art and proposes a constant temperature cockpit control method and system for new energy vehicles to achieve the following objectives: to realize intelligent constant temperature control of the vehicle cockpit, to prevent overheating caused by long-term parking of the vehicle in a high temperature environment, thereby providing users with a more comfortable cockpit environment.

[0010] In order to achieve the above object, the technical solution adopted by the present invention is: a method for controlling a constant temperature cabin of a new energy vehicle, the method comprising the following steps:

[0011] Step S1: In one power-on / off cycle, the overheat protection setting item of the constant temperature cabin is selected and turned on and fed back to the vehicle-mounted large screen at the same time, wherein the setting item includes an AC mode and a non-AC mode. In the AC mode, the cabin temperature is adjusted by a blower and a compressor, and in the non-AC mode, the cabin temperature is adjusted by a blower; wherein the state of the low-voltage power supply of the whole vehicle from non-OFF to OFF and then to non-OFF is regarded as one power-on / off cycle, and the setting item selected in one power-on / off cycle remains unchanged;

[0012] Step S2, judging the functional state that the selected setting item will enter according to the ambient temperature and the vehicle status, the functional state including the function maintenance state and the function exit state; in the function maintenance state, the thermal management system of the constant temperature cabin continues to send network management messages to maintain network wake-up to control the operation of the device in AC mode or no AC mode, and starts timing; in the function exit state, the thermal management system no longer maintains network wake-up to control the device in AC mode or no AC mode to stop, and restores the circulation damper and mode damper to the power-off default position.

[0013] Furthermore, in step S2, within a power-on / power-off cycle and before the vehicle enters sleep mode, if the ambient temperature and the vehicle state simultaneously meet the following conditions:

[0014] Vehicle fortification;

[0015] The vehicle low voltage power mode is OFF;

[0016] The vehicle exterior environment temperature is greater than a first vehicle exterior temperature threshold;

[0017] The battery SOC is greater than a first SOC threshold;

[0018] It is determined that the vehicle enters a function maintenance state.

[0019] Furthermore, in the function exit state, if it is detected that the low-voltage power supply mode of the whole vehicle changes from non-OFF to OFF, the process returns to step S1, otherwise the function exit state is maintained.

[0020] Furthermore, in the function maintenance state without AC mode, if the vehicle meets the following conditions at the same time:

[0021] The vehicle exterior environment temperature is greater than a second vehicle exterior temperature threshold;

[0022] The vehicle interior temperature is greater than a first vehicle interior temperature threshold;

[0023] In the function maintenance state, the following additional operations are performed: the blower is turned on at the maximum gear; the external circulation is turned on; the front air blowing mode is switched to the face blowing mode, until the vehicle meets any of the following conditions:

[0024] The vehicle exterior ambient temperature is lower than a third vehicle exterior temperature threshold;

[0025] The vehicle interior temperature is lower than a second vehicle interior temperature threshold;

[0026] Then stop the additional execution actions, that is, turn off the blower, restore the circulation damper and mode damper to the power-off default position, and continue to maintain the function maintenance state.

[0027] Furthermore, in the function maintenance state of AC mode, if the vehicle meets the following conditions at the same time:

[0028] The vehicle exterior environment temperature is greater than a second vehicle exterior temperature threshold;

[0029] The vehicle interior temperature is greater than a third vehicle interior temperature threshold;

[0030] In the function maintenance state, the following additional operations are performed: the blower is turned on at the maximum gear; the internal circulation is turned on; the compressor is turned on for cabin cooling; the front row air blowing mode is switched to the face blowing mode, until the vehicle meets any of the following conditions:

[0031] The vehicle exterior ambient temperature is lower than a third vehicle exterior temperature threshold;

[0032] The vehicle interior temperature is lower than a fourth vehicle interior temperature threshold;

[0033] Then stop the additional execution actions, that is, turn off the blower, stop the compressor speed request, restore the circulation damper and mode damper to the power-off default position, and continue to maintain the function maintenance state.

[0034] Furthermore, in the function maintenance state, if the high-voltage state of the whole vehicle is identified to change from ON to OFF, a high-voltage request is actively sent once; if the vehicle is in the period of additional execution of actions after the high-voltage state of the whole vehicle is identified to change from ON to OFF, the high-voltage request is actively sent again after the additional execution of actions is stopped; within the preset time after the high-voltage request is sent, it is determined whether the high-voltage state of the whole vehicle is restored to ON. If the high voltage is restored to ON, the function maintenance state is maintained; if the high voltage is still OFF, the function exit state is entered.

[0035] Furthermore, in the function maintenance state, if the vehicle meets any of the following conditions:

[0036] Vehicle disarming;

[0037] The vehicle's low-voltage power mode is not in OFF state;

[0038] The vehicle exterior environment temperature is less than or equal to a first vehicle exterior temperature threshold;

[0039] The timing in the function maintenance state is greater than the preset time threshold;

[0040] The battery SOC is less than or equal to a first SOC threshold;

[0041] The vehicle enters the function exit state.

[0042] Furthermore, if the vehicle is in the process of performing an additional action before entering the function exit state, the vehicle stops the additional action and then enters the function exit state.

[0043] Furthermore, if the vehicle enters the function exit state due to any of the following conditions:

[0044] The vehicle exterior environment temperature is less than or equal to a first vehicle exterior temperature threshold;

[0045] The timing in the function maintenance state is greater than the preset time threshold;

[0046] The battery SOC is less than or equal to a first SOC threshold;

[0047] Then further judge, if the vehicle also meets the following conditions:

[0048] The vehicle is in a fortified state;

[0049] The vehicle low voltage power mode is OFF;

[0050] The vehicle actively sends a high-voltage lowering request to enter the function exit state.

[0051] At the same time, the present application also proposes a constant temperature cabin control system for new energy vehicles based on the above method, the system including an outdoor temperature sensor, a cabin temperature sensor, a power management system, an automobile air-conditioning system, a controller, and an on-board large screen, wherein the controller is respectively connected to the outdoor temperature sensor, the cabin temperature sensor, the power management system, the automobile air-conditioning system, and the on-board large screen; the outdoor temperature sensor and the cabin temperature sensor are respectively used to collect temperature data outside the vehicle and inside the cabin and send them to the controller; the power management system is used to detect the vehicle's current low-voltage power mode, high-voltage state, and battery SOC and send them to the controller; the controller is used to receive data sent by the outdoor temperature sensor, the cabin temperature sensor, and the power management system and perform cabin constant temperature control according to the method described in any one of claims 1-8; the on-board large screen is used to provide a human-machine interface for the user to monitor the control process.

[0052] The technical effect of the present invention is as follows: the present invention provides two overheat protection settings for users: AC mode and non-AC mode, and users can choose according to actual needs to provide users with the most suitable cabin temperature. The present invention can automatically control the function maintenance or exit of the device in AC mode or non-AC mode according to the ambient temperature and vehicle status, with a high degree of intelligence, and at the same time provide users with the most secure and worry-free cabin experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a flow chart of a method for controlling a constant temperature cabin in a non-AC mode according to an embodiment of the present invention;

[0054] Figure 2 The figure is a flow chart of a method for controlling a constant temperature cabin in AC mode according to an embodiment of the present invention. DETAILED DESCRIPTION

[0055] The following is a further detailed description of the specific implementation of the present invention through the description of the embodiments with reference to the accompanying drawings, the purpose of which is to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation. It should be noted that the words "first", "second" and the like described in this application are only for the convenience of describing the technical solution to distinguish different components, and are not used to limit this application. In order to make the technical solution of the present invention clearer, the present invention is explained through the following embodiments.

[0056] This embodiment provides a method for controlling a constant temperature cabin of a new energy vehicle. Figure 1 and Figure 2 As shown, the method comprises the following steps:

[0057] Step S1, within a power-on / off cycle, select and start the overheat protection setting item of the constant temperature cabin and feed it back to the vehicle-mounted large screen at the same time, the setting item includes AC (air conditioning and cooling) mode and non-AC mode, in the AC mode, the cabin temperature is adjusted by the blower and the compressor, and in the non-AC mode, the cabin temperature is adjusted by the blower; wherein, the low-voltage power supply state of the whole vehicle from non-OFF to OFF and then to non-OFF is regarded as a power-on / off cycle, the setting item selected within a power-on / off cycle remains unchanged, but the function is no longer triggered only within this power-on / off cycle, and does not affect the judgment and execution within the next power-on / off cycle.

[0058] Step S2, judging the functional state that the selected setting item will enter according to the ambient temperature and the vehicle status, the functional state including the function maintenance state and the function exit state; in the function maintenance state, the thermal management system of the constant temperature cabin continues to send network management messages to maintain network wake-up to control the operation of the device in AC mode or no AC mode, and starts timing; in the function exit state, the thermal management system no longer maintains network wake-up to control the device in AC mode or no AC mode to stop, and restores the circulation damper and mode damper to the power-off default position.

[0059] Different users have different perceptions and preferences for temperature. Some users prefer a cooler environment, while others may not tolerate low temperatures. The selectability of AC mode and non-AC mode allows each user to set the air conditioner according to their preferences to meet personalized needs. After the user selects the setting item, this embodiment can automatically adjust the functional state of the setting item according to the ambient temperature and vehicle status to achieve constant temperature control in the cabin, providing users with a comfortable driving environment, especially when the vehicle is parked for a long time in summer.

[0060] Specifically, in step S2 of this embodiment, within a power-on / power-off cycle and before the vehicle enters sleep mode, if the ambient temperature and the vehicle state simultaneously meet the following conditions:

[0061] Vehicle fortification;

[0062] The vehicle low voltage power mode is OFF;

[0063] The vehicle external environment temperature is greater than a first vehicle external temperature threshold (in this embodiment, the first vehicle external temperature threshold is set to 15° C., which can be flexibly adjusted according to actual conditions during implementation. The same is true for other types of thresholds, which will not be described in detail later);

[0064] The battery SOC (battery remaining capacity) is greater than a first SOC threshold (in this embodiment, the first SOC threshold is set to 20%);

[0065] The vehicle is judged to enter the function maintenance state. Usually, when the low-voltage power mode is OFF and the vehicle is armed, the owner has left, the vehicle is parked and in a safety protection state. At this time, if the ambient temperature outside the vehicle is too high and the battery SOC is sufficient, the vehicle is controlled to enter the function maintenance state, so that the cabin temperature control is automatically started to provide a comfortable cabin environment for the user when he uses the car next time.

[0066] Among them, judging the function maintenance status within a power-on and power-off cycle and before the vehicle enters sleep mode can reduce the power consumption of the vehicle after sleep mode, so that the vehicle can maintain a constant temperature for a longer period of time.

[0067] In the function exit state of this embodiment, if it is detected that the vehicle low voltage power mode changes from non-OFF to OFF, then return to step S1, otherwise maintain the function exit state. The vehicle low voltage power mode changes from non-OFF to OFF, indicating the end of a power cycle, and the user can reselect the setting item at this time.

[0068] like Figure 1 As shown, in the function maintenance state without AC mode, if the vehicle meets the following conditions at the same time:

[0069] The vehicle external environment temperature is greater than a second vehicle external temperature threshold (in this embodiment, the second vehicle external temperature threshold is set to 30° C.);

[0070] The vehicle interior temperature is greater than a first vehicle interior temperature threshold (in this embodiment, the first vehicle interior temperature threshold is set to 50° C.);

[0071] In the function maintenance state, the following additional operations are performed: the blower is turned on at the maximum gear; the external circulation is turned on; the front air blowing mode is switched to the face blowing mode, so as to quickly cool the cabin, until the vehicle meets any of the following conditions:

[0072] The vehicle external environment temperature is lower than a third vehicle external temperature threshold value (in this embodiment, the third vehicle external temperature threshold value is set to 20° C.);

[0073] The vehicle interior temperature is lower than a second vehicle interior temperature threshold value (in this embodiment, the second vehicle interior temperature threshold value is set to 40° C.);

[0074] Then stop the additional execution actions, that is, turn off the blower, restore the circulation damper and mode damper to the power-off default position, and continue to maintain the function maintenance state.

[0075] like Figure 2 As shown, in the function maintenance state of AC mode, if the vehicle meets the following conditions at the same time:

[0076] The vehicle external environment temperature is greater than a second vehicle external temperature threshold (in this embodiment, the second vehicle external temperature threshold is set to 30° C.);

[0077] The vehicle interior temperature is greater than a third vehicle interior temperature threshold (in this embodiment, the third vehicle interior temperature threshold is set to 45° C.);

[0078] In the function maintenance state, the following additional operations are performed: the blower is turned on at the maximum gear; the internal circulation is turned on; the compressor is turned on for cabin cooling; the front row air blowing mode is switched to the face blowing mode, until the vehicle meets any of the following conditions:

[0079] The vehicle external environment temperature is lower than a third vehicle external temperature threshold value (in this embodiment, the third vehicle external temperature threshold value is set to 20° C.);

[0080] The vehicle interior temperature is lower than a fourth vehicle interior temperature threshold value (in this embodiment, the fourth vehicle interior temperature threshold value is set to 35° C.);

[0081] Then stop the additional execution actions, that is, turn off the blower, stop the compressor speed request, restore the circulation damper and mode damper to the power-off default position, and continue to maintain the function maintenance state.

[0082] The various temperature thresholds in AC mode are lower than those in non-AC mode. This is because the compressor is involved in refrigeration in AC mode, the cooling effect will be more significant, and can meet the lower temperature requirements of the cabin.

[0083] In this embodiment, when the vehicle is in a function maintenance state, if the vehicle meets any of the following conditions:

[0084] Vehicle disarming;

[0085] The vehicle's low-voltage power mode is not in OFF state;

[0086] The vehicle external environment temperature is less than or equal to the first vehicle external temperature threshold, that is, 15°C;

[0087] The timer in the function maintenance state is greater than the preset time threshold, which is set to 12 hours in this embodiment;

[0088] The battery SOC is less than or equal to the first SOC threshold, i.e., 20%;

[0089] The vehicle enters the function exit state. Furthermore, if the vehicle is in the process of executing additional actions before entering the function exit state, the additional execution of actions will be stopped before entering the function exit state. The vehicle is disarmed or the low-voltage power supply mode of the whole vehicle is in a non-OFF state, which means that the user has started to use the vehicle and there is no need to maintain the function maintenance state. The ambient temperature outside the vehicle is less than or equal to the first outdoor temperature threshold, which means that the ambient temperature is low. At this time, the temperature can ensure that the cabin will not overheat. The timing in the function maintenance state is greater than the preset time threshold, or the timing in the function maintenance state is greater than the preset time threshold, which means that the duration of the function maintenance state is long enough. If it continues to be maintained, the battery power may not be able to meet the needs of normal vehicle starting.

[0090] At the same time, if the vehicle enters the function exit state due to any of the following conditions:

[0091] The vehicle exterior environment temperature is less than or equal to a first vehicle exterior temperature threshold;

[0092] The timing in the function maintenance state is greater than the preset time threshold;

[0093] The battery SOC is less than or equal to a first SOC threshold;

[0094] Then further judge, if the vehicle also meets the following conditions:

[0095] The vehicle is in a fortified state;

[0096] The vehicle low voltage power mode is OFF;

[0097] The vehicle will actively send a high-voltage down request to enter the function exit state. When the vehicle is in the fortified state and the low-voltage power mode is OFF, the vehicle as a whole should be in a relatively static and low-energy state. If the function exit state is entered due to factors such as the outside temperature, too long timing, or insufficient power, sending a high-voltage down request can ensure that the vehicle's high-voltage system is completely shut down, avoiding unnecessary power consumption by the high-voltage system, and preventing potential risks that may occur in the high-voltage system when the vehicle is stationary for a long time, such as leakage, self-discharge, and excessive battery loss.

[0098] The normal operation of the constant temperature cabin depends on a certain power supply, especially stable power supply under high voltage. In this embodiment, when the vehicle is in the function maintenance state, if it is recognized that the high voltage state of the whole vehicle changes from ON to OFF, a high voltage request is actively sent; if the vehicle is in the process of additional execution after recognizing that the high voltage state of the whole vehicle changes from ON to OFF, the vehicle stops the additional execution and then actively sends a high voltage request; within the preset time (set to 30 seconds in this embodiment) after the high voltage request is sent, it is determined whether the high voltage state of the whole vehicle has returned to ON. If the high voltage is restored to ON, it is maintained in the function maintenance state. If the high voltage is still OFF, it enters the function exit state.

[0099] At the same time, according to the above method, this embodiment also proposes a constant temperature cabin control system for new energy vehicles, the system including an outdoor temperature sensor, a cabin temperature sensor, a power management system, an automobile air conditioning system, a controller, and an on-board large screen, wherein the controller is respectively connected to the outdoor temperature sensor, the cabin temperature sensor, the power management system, the automobile air conditioning system, and the on-board large screen; the outdoor temperature sensor and the cabin temperature sensor are respectively used to collect temperature data outside the vehicle and inside the cabin and send them to the controller; the power management system is used to detect the current low-voltage power mode, high-voltage state, and battery SOC of the vehicle and send them to the controller; the controller is used to receive data sent by the outdoor temperature sensor, the cabin temperature sensor, and the power management system and perform constant temperature control of the cabin according to the method of this embodiment; the on-board large screen is used to provide a human-machine interface for the user to monitor the control process, for example, the currently selected setting items and their status can be processed by the controller and sent to the on-board large screen for display.

[0100] The present invention provides users with two overheat protection settings: AC mode and no AC mode. Users can choose according to actual needs to provide users with the most suitable cabin temperature. The present invention can automatically control the function of the device in AC mode or no AC mode to maintain or exit according to the ambient temperature and vehicle status. The operating logic of the entire constant temperature cabin can be automatically adjusted according to different vehicle states and environmental conditions within a power-on and power-off cycle, reducing the need for manual intervention by users. It has a high degree of intelligence and provides users with the most secure and worry-free cabin experience.

[0101] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A method for controlling a constant temperature cabin of a new energy vehicle, characterized in that: The method comprises the following steps: Step S1: In one power-on / off cycle, the overheat protection setting item of the constant temperature cabin is selected and turned on and fed back to the vehicle-mounted large screen at the same time, wherein the setting item includes an AC mode and a non-AC mode. In the AC mode, the cabin temperature is adjusted by a blower and a compressor, and in the non-AC mode, the cabin temperature is adjusted by a blower; wherein the state of the low-voltage power supply of the whole vehicle from non-OFF to OFF and then to non-OFF is regarded as one power-on / off cycle, and the setting item selected in one power-on / off cycle remains unchanged; Step S2, judging the functional state that the selected setting item will enter according to the ambient temperature and the vehicle status, the functional state including the function maintenance state and the function exit state; in the function maintenance state, the thermal management system of the constant temperature cabin continues to send network management messages to maintain network wake-up to control the operation of the device in AC mode or no AC mode, and starts timing; in the function exit state, the thermal management system no longer maintains network wake-up to control the device in AC mode or no AC mode to stop, and restores the circulation damper and mode damper to the power-off default position.

2. A constant temperature cabin control method for a new energy vehicle according to claim 1, characterized in that: In step S2, within a power-on / power-off cycle and before the vehicle enters sleep mode, if the ambient temperature and the vehicle status simultaneously meet the following conditions: Vehicle fortification; The vehicle low voltage power mode is OFF; The vehicle exterior environment temperature is greater than a first vehicle exterior temperature threshold; The battery SOC is greater than a first SOC threshold; It is determined that the vehicle enters a function maintenance state.

3. The method for controlling a constant temperature cabin of a new energy vehicle according to claim 1, characterized in that: In the function exit state, if it is detected that the low-voltage power supply mode of the whole vehicle changes from non-OFF to OFF, the process returns to step S1, otherwise the function exit state is maintained.

4. The method for controlling a constant temperature cabin of a new energy vehicle according to claim 2, characterized in that: In the function maintenance state without AC mode, if the vehicle meets the following conditions at the same time: The vehicle exterior environment temperature is greater than a second vehicle exterior temperature threshold; The vehicle interior temperature is greater than a first vehicle interior temperature threshold; In the function maintenance state, the following additional operations are performed: the blower is turned on at the maximum gear; the external circulation is turned on; the front air blowing mode is switched to the face blowing mode, until the vehicle meets any of the following conditions: The vehicle exterior ambient temperature is lower than a third vehicle exterior temperature threshold; The vehicle interior temperature is lower than a second vehicle interior temperature threshold; Then stop the additional execution actions, that is, turn off the blower, restore the circulation damper and mode damper to the power-off default position, and continue to maintain the function maintenance state.

5. The method for controlling a constant temperature cabin of a new energy vehicle according to claim 2, characterized in that: In the AC mode function maintenance state, if the vehicle meets the following conditions at the same time: The vehicle exterior environment temperature is greater than a second vehicle exterior temperature threshold; The vehicle interior temperature is greater than a third vehicle interior temperature threshold; In the function maintenance state, the following additional operations are performed: the blower is turned on at the maximum gear; the internal circulation is turned on; the compressor is turned on for cabin cooling; the front row air blowing mode is switched to the face blowing mode, until the vehicle meets any of the following conditions: The vehicle exterior ambient temperature is lower than a third vehicle exterior temperature threshold; The vehicle interior temperature is lower than a fourth vehicle interior temperature threshold; Then stop the additional execution actions, that is, turn off the blower, stop the compressor speed request, restore the circulation damper and mode damper to the power-off default position, and continue to maintain the function maintenance state.

6. A method for controlling a constant temperature cabin of a new energy vehicle according to any one of claims 2 to 5, characterized in that: In the function maintenance state, if the high-voltage state of the whole vehicle is identified to change from ON to OFF, a high-voltage request is actively sent; if the vehicle is in the period of additional execution after the high-voltage state of the whole vehicle is identified to change from ON to OFF, the high-voltage request is actively sent again after the additional execution is stopped; within the preset time after the high-voltage request is sent, it is judged whether the high-voltage state of the whole vehicle is restored to ON. If the high voltage is restored to ON, it is maintained in the function maintenance state. If the high voltage is still OFF, it enters the function exit state.

7. A method for controlling a constant temperature cabin of a new energy vehicle according to any one of claims 2 to 5, characterized in that: In the function maintenance state, if the vehicle meets any of the following conditions: Vehicle disarming; The vehicle's low-voltage power mode is not in OFF state; The vehicle exterior environment temperature is less than or equal to a first vehicle exterior temperature threshold; The timing in the function maintenance state is greater than the preset time threshold; The battery SOC is less than or equal to a first SOC threshold; The vehicle enters the function exit state.

8. The method for controlling a constant temperature cabin of a new energy vehicle according to claim 7, characterized in that: If the vehicle is in the process of performing an additional action before entering the function exit state, the vehicle stops the additional action before entering the function exit state.

9. A constant temperature cabin control method for a new energy vehicle according to claim 8, characterized in that: If the vehicle enters the function exit state due to any of the following conditions: The vehicle exterior environment temperature is less than or equal to a first vehicle exterior temperature threshold; The timing in the function maintenance state is greater than the preset time threshold; The battery SOC is less than or equal to a first SOC threshold; Then further judge, if the vehicle also meets the following conditions: The vehicle is in a fortified state; The vehicle low voltage power mode is OFF; The vehicle actively sends a high-voltage lowering request to enter the function exit state.

10. A constant temperature cabin control system for a new energy vehicle according to the method according to any one of claims 1 to 9, characterized in that: The system includes an outdoor temperature sensor, a cabin temperature sensor, a power management system, an automobile air-conditioning system, a controller, and an on-board large screen, wherein the controller is respectively connected to the outdoor temperature sensor, the cabin temperature sensor, the power management system, the automobile air-conditioning system, and the on-board large screen; the outdoor temperature sensor and the cabin temperature sensor are respectively used to collect temperature data outside the vehicle and inside the cabin and send them to the controller; the power management system is used to detect the vehicle's current low-voltage power mode, high-voltage state, and battery SOC and send them to the controller; the controller is used to receive data sent by the outdoor temperature sensor, the cabin temperature sensor, and the power management system and perform cabin constant temperature control according to the method described in any one of claims 1-8; the on-board large screen is used to provide a human-machine interface for the user to monitor the control process.

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