Automobile photovoltaic power generation roof box forced retraction method and system based on environment induction

Abstract

The invention relates to an automobile photovoltaic power generation roof box forced retraction method based on environment sensing. The method comprises the following steps that an environment sensing system monitors the external environment of a roof box in real time, the wind speed, precipitation and vibration conditions are detected, and a wind speed sensor, a rainwater sensor and a vibration sensor are used for data collection. The system judges whether the environment condition exceeds a safety range or not through a set environment threshold value, and when the wind speed, the precipitation amount or the vibration amplitude exceeds the set preset threshold value, a retraction signal is triggered; after the retraction signal is triggered, the retraction operation of the roof box sub-frame is started through the driving control assembly, so that the roof box photovoltaic panel and the sub-frame retract into the roof box main frame; according to the automobile photovoltaic power generation roof box forced retraction method based on environmental induction, when environmental factors such as wind speed, precipitation and vibration exceed safety threshold values, retraction signals can be automatically triggered, a roof box photovoltaic panel is effectively retracted by driving a control assembly, and unnecessary damage to a system caused by environmental risks is avoided.

Description

Technical Field

[0001] This invention relates to a method and system for the forced retraction of a vehicle photovoltaic roof box based on environmental sensing. Background Technology

[0002] With the increasing popularity of environmental protection concepts and the continuous development of new energy technologies, rooftop photovoltaic (PV) power generation systems have gradually gained widespread application as a green energy solution. Rooftop boxes, as an add-on device, are often designed for functions such as carrying and storing goods, as well as providing power support to vehicles. In particular, installing photovoltaic panels on rooftop boxes can effectively utilize solar energy to supplement the vehicle's power supply. However, in practical use, rooftop PV systems face a series of technical challenges, especially under harsh weather or complex environmental conditions, where their stability and safety cannot be fully guaranteed.

[0003] Most rooftop solar power systems on the market currently lack real-time monitoring and response mechanisms for environmental changes. Car owners cannot constantly monitor external weather changes, such as strong winds, heavy rain, or vibrations caused by road conditions, which may lead to damage or detachment of the rooftop solar panels under severe environmental conditions like storms and strong winds. Traditional rooftop solar systems typically lack automated protection mechanisms when encountering unstable environmental conditions, often relying on manual intervention or periodic inspections. This lack of automation and intelligence reduces the safety of solar power systems under sudden weather conditions.

[0004] Existing rooftop solar systems typically lack intelligent environmental sensing systems, making it impossible to comprehensively assess whether the environment is suitable for the normal operation of the solar panels based on multiple factors such as wind speed, precipitation, and vibration. When external environmental conditions exceed a preset threshold, the rooftop solar system fails to take timely measures, such as automatic retraction or protective operation. This failure to anticipate the impact of adverse environmental conditions on the solar system can lead to potential damage to the solar panels, malfunction of the rooftop, and even endanger other driving safety aspects.

[0005] Currently, most rooftop solar panels on the market rely on manual operation for their retraction function. This operation often has limitations and lacks effective automation and intelligent control. Especially when faced with external environmental factors such as wind speed, precipitation, or vibration, manual operation is not only slow to react but also prone to errors. Current retraction designs lack real-time responsiveness to these factors, leading to untimely and inaccurate retraction, potentially damaging the rooftop solar system or failing to protect the safety of the vehicle owner and other road users. Summary of the Invention

[0006] The purpose of this invention is to provide a method and system for forced retraction of a vehicle rooftop photovoltaic system based on environmental sensing. This system can automatically trigger a retraction signal when environmental factors such as wind speed, precipitation, and vibration exceed safety thresholds, and effectively retract the rooftop photovoltaic panel by driving control components. This avoids unnecessary damage to the system caused by environmental risks and improves the safety, reliability, and intelligence level of the rooftop photovoltaic system.

[0007] The technical solution adopted by this invention to solve its technical problem is:

[0008] A method for forced retraction of a vehicle photovoltaic roof box based on environmental sensing, comprising the following steps:

[0009] The environmental sensing system monitors the external environment of the roof box in real time, detecting wind speed, precipitation and vibration, and uses wind speed sensor, rain sensor and vibration sensor to collect data;

[0010] The system determines whether environmental conditions exceed the safe range by setting environmental thresholds. When wind speed, precipitation, or vibration amplitude exceeds the preset threshold, a retraction signal is triggered.

[0011] After the retraction signal is triggered, the retraction operation of the roof box subframe is initiated through the drive control component, so that the roof box photovoltaic panels and subframe retract into the roof box main frame.

[0012] Preferably, the wind speed sensor triggers a retraction signal when the wind speed reaches or exceeds a preset value, where the preset value is the wind speed V. wind It satisfies the following formula:

[0013] V wind ≥V threshold

[0014] Among them, V wind V represents the actual wind speed in the area where the roof box is located. threshold As a safety threshold, when V wind ≥V threshold At that time, the system activates the rollback mechanism.

[0015] Preferably, the rain sensor triggers a retraction signal when it detects that the rainfall reaches or exceeds a preset value, wherein the preset rainfall is P. rain It satisfies the following formula:

[0016] P rain ≥P threshold

[0017] Among them, P rain P represents the amount of precipitation detected on the roof box surface. threshold As the safe threshold for precipitation, when P rain ≥P thresholdAt that time, the system activates the rollback mechanism.

[0018] Preferably, the vibration sensor triggers a retraction signal when it detects vibration exceeding a preset threshold, wherein the preset vibration threshold is A. vib It satisfies the following formula:

[0019] A vib ≥A threshold

[0020] Among them, A vib A represents the vibration amplitude detected by the vibration sensor. threshold As the safety threshold for vibration, when A vib ≥A threshold At that time, the system activates the rollback mechanism.

[0021] Preferably, the environmental sensing system includes a wind speed sensor, a rain sensor, and a vibration sensor, and the system calculates the environmental sensing value using the following formula to determine whether to initiate the retraction operation:

[0022] Threshold retract = w1*Vwind + w2*Prain + w3*Avib

[0023] in:

[0024] Vwind is the wind speed in the area where the roof box is located;

[0025] Prain is the amount of precipitation detected on the roof box surface;

[0026] Avib represents the amplitude of vibration;

[0027] w1, w2, w3 are weighting coefficients, and w1 + w2 + w3 = 1;

[0028] When Threshold retract ≥Threshold limit At that time, the system triggers a forced retraction operation.

[0029] Preferably, the retraction signal is received by the control system and the retraction of the roof box subframe is achieved through a drive control component, the drive control component comprising:

[0030] The main drive assembly is used to drive the retraction of the photovoltaic panel side extension frame;

[0031] Sub-drive assembly, used to drive the retraction of the subframe;

[0032] The control unit receives environmental data and initiates a retraction signal based on a set retraction threshold.

[0033] Preferably, the system will issue a forced retraction signal when the wind speed, precipitation, and vibration amplitude simultaneously meet the following conditions:

[0034] V wind ≥V threshold And P rain ≥P threshold And A vib ≥A threshold .

[0035] Another technical problem to be solved by the present invention is to provide a forced retraction system for a car photovoltaic roof box based on environmental sensing, comprising:

[0036] Environmental sensing system: used to monitor the external environment of the roof box in real time, including wind speed sensor, rain sensor and vibration sensor to collect wind speed, precipitation and vibration data;

[0037] Control unit: Used to receive data collected by the environmental sensing system and determine whether to trigger a retraction signal based on the set retraction threshold;

[0038] Drive control component: Based on the retraction signal issued by the control unit, drive the retraction operation of the roof box subframe to ensure that the photovoltaic panels retract into the roof box main frame.

[0039] Preferably, the control unit further includes:

[0040] Judgment module: Used to receive real-time data of wind speed, precipitation and vibration amplitude, and determine whether the retraction condition is exceeded according to the set retraction threshold formula;

[0041] Alarm module: When the retraction condition is met, it sends a retraction command to the drive control component.

[0042] Preferably, the drive control component includes:

[0043] Main drive unit: used to control the retraction of the roof-mounted photovoltaic panels;

[0044] Secondary drive unit: used to control the retraction of the roof box subframe;

[0045] Slide rail and guide rail system: Used to provide the retraction path between the photovoltaic panel and the sub-frame, ensuring smooth execution of the retraction action.

[0046] Compared with the prior art, the beneficial effects of the present invention are:

[0047] This method enables real-time monitoring of environmental conditions, ensuring automatic retraction of the photovoltaic panels to protect them from damage in cases of excessive wind speed, heavy rainfall, or strong vibrations. When environmental conditions deteriorate, the retraction of the roof-mounted photovoltaic panels is automatically initiated, preventing prolonged exposure of the roof-mounted box to unsafe conditions. By setting thresholds and utilizing data from multiple sensors for comprehensive judgment, the response sensitivity and applicability of the retraction operation are effectively improved. Furthermore, the coordinated operation of the drive control components ensures smooth retraction of the roof-mounted subframe, avoiding risks associated with human error or mechanical failure. Attached Figure Description

[0048] Figure 1 This is a flowchart of a method for forced retraction of a vehicle photovoltaic roof box based on environmental sensing. Detailed Implementation

[0049] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0050] 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 invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0051] Example

[0052] See Figure 1 As shown, a method for forced retraction of a vehicle photovoltaic roof box based on environmental sensing includes the following steps:

[0053] The environmental sensing system monitors the external environment of the roof box in real time, detecting wind speed, precipitation and vibration, and uses wind speed sensors, rain sensors and vibration sensors to collect data.

[0054] The system determines whether environmental conditions exceed the safe range by setting environmental thresholds. When wind speed, precipitation, or vibration amplitude exceeds the preset threshold, a retraction signal is triggered.

[0055] After the retraction signal is triggered, the retraction operation of the roof box subframe is initiated through the drive control component, so that the roof box photovoltaic panels and subframe retract into the roof box main frame.

[0056] By monitoring environmental factors such as wind speed, precipitation, and vibration in real time, this method can automatically trigger a retraction operation when severe weather or external environmental conditions exceed safe limits. This prevents damage to the photovoltaic panels in strong winds, heavy rain, or severe vibrations, reducing safety hazards during vehicle operation, especially the potential dangers caused by photovoltaic panels falling off or breaking.

[0057] This solution combines an environmental sensing system with an automatic retraction mechanism to achieve intelligent management of the photovoltaic system, reducing reliance on manual intervention. Even when the driver cannot notice changes in the environment in time, the system can automatically judge and react, improving driving convenience and safety.

[0058] The automatic retraction function effectively protects the rooftop solar panels from harsh weather conditions such as wind, rain, and vibration, thereby reducing wear and damage to the solar system and extending its service life. At the same time, it prevents potential damage to the solar panels caused by external environmental factors, reduces maintenance costs, and improves the overall durability of the system.

[0059] The wind speed sensor triggers a retraction signal when the wind speed reaches or exceeds a preset value, where the preset value is the wind speed V. wind It satisfies the following formula:

[0060] V wind ≥V threshold

[0061] Among them, V wind V represents the actual wind speed in the area where the roof box is located. threshold As a safety threshold, when V wind ≥V threshold At that time, the system activates the rollback mechanism.

[0062] The rain sensor triggers a retraction signal when it detects that the rainfall reaches or exceeds a preset value, where the preset rainfall is P. rain It satisfies the following formula:

[0063] P rain ≥P threshold

[0064] Among them, P rain P represents the amount of precipitation detected on the roof box surface. threshold As the safe threshold for precipitation, when P rain ≥P threshold At that time, the system activates the rollback mechanism.

[0065] The vibration sensor triggers a retraction signal when it detects vibration exceeding a preset threshold, where the preset vibration threshold is A. vib It satisfies the following formula:

[0066] Avib ≥A threshold

[0067] Among them, A vib A represents the vibration amplitude detected by the vibration sensor. threshold As the safety threshold for vibration, when A vib ≥A threshold At that time, the system activates the rollback mechanism.

[0068] By monitoring environmental data such as wind speed, precipitation, and vibration in real time, the system automatically activates a retraction mechanism when these data reach preset safety thresholds, requiring no manual intervention. This eliminates the need for vehicle owners to constantly monitor external environmental conditions, effectively enhancing the intelligent protection of the roof box and making the vehicle safer in various driving environments.

[0069] This solution proactively triggers a retraction operation under adverse weather conditions (such as strong winds, heavy rain, or severe vibrations), preventing damage to the photovoltaic rooftop box caused by the external environment and reducing potential maintenance costs. It effectively extends the lifespan of the photovoltaic panels and the rooftop box, lowering long-term maintenance costs.

[0070] When wind speed, precipitation, or vibration reaches the set safety threshold, the system automatically retracts the roof-mounted solar panels, avoiding additional wind resistance or damage to the panels during high-speed driving or in severe weather, thereby ensuring the stability and safety of the vehicle and reducing the potential hazards of external factors during driving.

[0071] The environmental sensing system includes a wind speed sensor, a rain sensor, and a vibration sensor. The system calculates the environmental sensing value using the following formula to determine whether to initiate the retraction operation:

[0072] Threshold retract = w1*Vwind + w2*Prain + w3*Avib

[0073] in:

[0074] Vwind is the wind speed in the area where the roof box is located;

[0075] Prain is the amount of precipitation detected on the roof box surface;

[0076] Avib represents the amplitude of vibration;

[0077] w1, w2, w3 are weighting coefficients, and w1 + w2 + w3 = 1;

[0078] When Threshold retract ≥Threshold limit At that time, the system triggers a forced retraction operation.

[0079] By introducing weighting coefficients w1, w2, and w3, this scheme can adjust its sensitivity to retraction triggering conditions based on different environmental factors (wind speed, precipitation, and vibration). This allows for flexible adjustment according to actual environmental conditions, ensuring that the system can make reasonable judgments when multiple environmental factors act together, and avoiding malfunctions caused by overly simplistic triggering conditions.

[0080] The environmental threshold is calculated using data from multiple sensors, including wind speed, precipitation, and vibration. retract This allows the system to comprehensively assess the complexity of current environmental conditions, rather than relying solely on a single environmental factor. This multi-dimensional comprehensive judgment can more accurately determine whether to initiate a pullback operation, improving the system's accuracy and reliability.

[0081] The flexible setting of weighting coefficients w1, w2, and w3 allows the system to adapt to different environmental requirements or specific driving scenarios. For example, the weighting coefficients can be adjusted according to the climate conditions of the region where the vehicle is used, making the system more adaptable to specific environments, thereby improving the accuracy and adaptability of the retraction operation. By adjusting these coefficients, car owners can optimize the triggering criteria of the retraction mechanism according to their individual needs.

[0082] The retraction signal is received by the control system and the retraction of the roof box subframe is achieved through the drive control component, which includes:

[0083] The main drive assembly is used to drive the retraction of the photovoltaic panel side extension frame;

[0084] Sub-drive assembly, used to drive the retraction of the subframe;

[0085] The control unit receives environmental data and initiates a retraction signal based on a set retraction threshold.

[0086] When wind speed, precipitation, and vibration amplitude simultaneously meet the following conditions, the system will issue a forced retraction signal:

[0087] V wind ≥V threshold And P rain ≥P threshold And A vib ≥A threshold .

[0088] The system requires wind speed, precipitation, and vibration amplitude to simultaneously meet specific conditions, ensuring that forced retraction is only initiated under extremely harsh environmental conditions. This multi-layered safety protection mechanism effectively prevents accidental triggering, ensuring that retraction is only performed when truly necessary, thus improving the system's accuracy and reliability.

[0089] This solution employs a main drive component and a secondary drive component to control the retraction operation of the photovoltaic panel side extension frame and the sub-frame, respectively. This distributed drive design makes the system more flexible and efficient. By independently controlling the retraction of each component, it can better adapt to complex roof box structures and ensure the smoothness and coordination of the retraction operation, thereby avoiding malfunctions caused by component jamming or asynchrony.

[0090] The control unit receives environmental data and automatically sends a retraction signal based on a set retraction threshold, enabling it to respond automatically to environmental changes without human intervention. This automated retraction mechanism not only improves ease of use but also enhances safety, especially in the event of weather changes or sudden road conditions, protecting the roof box from damage and extending its service life.

[0091] A forced retraction system for a vehicle photovoltaic roof box based on environmental sensing, comprising:

[0092] Environmental sensing system: used to monitor the external environment of the roof box in real time, including wind speed sensor, rain sensor and vibration sensor to collect wind speed, precipitation and vibration data;

[0093] Control unit: Used to receive data collected by the environmental sensing system and determine whether to trigger a retraction signal based on the set retraction threshold;

[0094] Drive control component: Based on the retraction signal issued by the control unit, drive the retraction operation of the roof box subframe to ensure that the photovoltaic panels retract into the roof box main frame.

[0095] This system can monitor wind speed, precipitation, and vibration data in real time, and determines whether to trigger a retraction operation through the control unit. When environmental conditions are severe (such as strong winds, heavy rain, or severe vibrations), the system can automatically trigger a retraction signal to ensure the solar panels retract into the roof box's main frame, preventing damage to the solar panels or the roof box under adverse weather conditions. This significantly improves the safety of the roof solar panels and the user experience for vehicle owners.

[0096] Through environmental sensing and control unit automatic judgment, the system can automatically complete the retraction process without manual operation by the driver. This not only improves convenience but also reduces misoperation or oversight caused by improper human operation, further enhancing system reliability and user experience.

[0097] By ensuring the timely retraction of the solar panels under extreme weather conditions, the system effectively prevents the panels from being exposed to environmental factors such as strong winds, precipitation, or vibrations, thereby reducing damage to the solar panels from the external environment. This intelligent retraction design helps extend the lifespan of the solar panels and roof box, reducing maintenance and replacement costs.

[0098] The control unit further includes:

[0099] Judgment module: Used to receive real-time data of wind speed, precipitation and vibration amplitude, and determine whether the retraction condition is exceeded according to the set retraction threshold formula;

[0100] Alarm module: When the retraction condition is met, it sends a retraction command to the drive control component.

[0101] The drive control component includes:

[0102] Main drive unit: used to control the retraction of the roof-mounted photovoltaic panels;

[0103] Secondary drive unit: used to control the retraction of the roof box subframe;

[0104] Slide rail and guide rail system: Used to provide the retraction path between the photovoltaic panel and the sub-frame, ensuring smooth execution of the retraction action.

[0105] By receiving real-time data on wind speed, precipitation, and vibration amplitude from the judgment module and comparing it with a set retraction threshold, the system can accurately determine whether the retraction conditions are met. When the conditions are met, the alarm module is automatically triggered to send a retraction command to the drive control component, without manual intervention. This automated design improves the system's response speed and accuracy, ensuring timely protection of photovoltaic panels in severe weather and reducing the risk of damage.

[0106] The system employs a slide rail and guide rail system to ensure smooth retraction of the photovoltaic panels and subframe. The slide rail and guide rail system provides stable physical support, reducing the risk of failure due to friction or resistance during retraction, thereby improving system reliability and lifespan. Furthermore, the smooth retraction operation reduces potential damage to the roof box and photovoltaic panels, enhancing the long-term stability of the equipment.

[0107] The main drive unit and the auxiliary drive unit control the retraction operation of the photovoltaic panels and the sub-frame, respectively, allowing each component to complete the retraction task independently and in a coordinated manner. This design enhances the system's flexibility, enabling the retraction process to adapt more efficiently to different external environmental changes. Simultaneously, the two drive units work together to ensure balance and stability during retraction, avoiding potential problems caused by component asynchrony.

[0108] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention. The implementation of the present invention is not limited thereto. All other modifications, substitutions or alterations made to the above structure of the present invention based on the above content of the present invention, in accordance with ordinary technical knowledge and common practice in the field, without departing from the basic technical idea of ​​the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A method for forced retraction of a vehicle photovoltaic roof box based on environmental sensing, characterized in that, Includes the following steps: The environmental sensing system monitors the external environment of the roof box in real time, detecting wind speed, precipitation and vibration, and uses wind speed sensor, rain sensor and vibration sensor to collect data; The system determines whether environmental conditions exceed the safe range by setting environmental thresholds. When wind speed, precipitation, or vibration amplitude exceeds the preset threshold, a retraction signal is triggered. After the retraction signal is triggered, the retraction operation of the roof box subframe is initiated through the drive control component, so that the roof box photovoltaic panels and subframe retract into the roof box main frame.

2. The method for forced retraction of the automotive photovoltaic roof box based on environmental sensing according to claim 1, characterized in that, The wind speed sensor triggers a retraction signal when the wind speed reaches or exceeds a preset value, where the preset value is the wind speed V. wind It satisfies the following formula: In wind ≥V threshold Among them, V wind V represents the actual wind speed in the area where the roof box is located. threshold As a safety threshold, when V wind ≥V threshold At that time, the system activates the rollback mechanism.

3. The method for forced retraction of the automotive photovoltaic roof box based on environmental sensing according to claim 1, characterized in that, The rain sensor triggers a retraction signal when it detects that the rainfall reaches or exceeds a preset value, where the preset rainfall is P. rain It satisfies the following formula: P rain ≥P threshold Among them, P rain P represents the amount of precipitation detected on the roof box surface. threshold As the safe threshold for precipitation, when P rain ≥P threshold At that time, the system activates the rollback mechanism.

4. The method for forced retraction of the automotive photovoltaic roof box based on environmental sensing according to claim 1, characterized in that, The vibration sensor triggers a retraction signal when it detects vibration exceeding a preset threshold, where the preset vibration threshold is A. vib It satisfies the following formula: A vib ≥A threshold Among them, A vib A represents the vibration amplitude detected by the vibration sensor. threshold As the safety threshold for vibration, when A vib ≥A threshold At that time, the system activates the rollback mechanism.

5. The method for forced retraction of the automotive photovoltaic roof box based on environmental sensing according to claim 1, characterized in that, The environmental sensing system includes a wind speed sensor, a rain sensor, and a vibration sensor. The system calculates the environmental sensing value using the following formula to determine whether to initiate the retraction operation: Threshold retract =w1*Vwind+w2*Prain+w3*Avib in: Vwind is the wind speed in the area where the roof box is located; Prain is the amount of precipitation detected on the roof box surface; Avib represents the amplitude of vibration; w1, w2, w3 are weighting coefficients, and w1 + w2 + w3 = 1; When Threshold retract ≥Threshold limit At that time, the system triggers a forced retraction operation.

6. The method for forced retraction of the automotive photovoltaic roof box based on environmental sensing according to claim 1, characterized in that, The retraction signal is received by the control system and the retraction of the roof box subframe is achieved through the drive control component, which includes: The main drive assembly is used to drive the retraction of the photovoltaic panel side extension frame; Sub-drive assembly, used to drive the retraction of the subframe; The control unit receives environmental data and initiates a retraction signal based on a set retraction threshold.

7. The method for forced retraction of the automotive photovoltaic roof box based on environmental sensing according to claim 1, characterized in that, The triggering conditions for the retraction signal are as follows: When wind speed, precipitation, and vibration amplitude simultaneously meet the following conditions, the system will issue a forced retraction signal: V wind ≥V threshold And P rain ≥P threshold And A vib ≥A threshold .

8. A forced retraction system for a vehicle photovoltaic roof box based on environmental sensing, characterized in that, include: Environmental sensing system: used to monitor the external environment of the roof box in real time, including wind speed sensor, rain sensor and vibration sensor to collect wind speed, precipitation and vibration data; Control unit: Used to receive data collected by the environmental sensing system and determine whether to trigger a retraction signal based on the set retraction threshold; Drive control component: Based on the retraction signal issued by the control unit, drive the retraction operation of the roof box subframe to ensure that the photovoltaic panels retract into the roof box main frame.

9. The forced retraction system for the automotive photovoltaic roof box based on environmental sensing according to claim 8, characterized in that, The control unit further includes: Judgment module: Used to receive real-time data of wind speed, precipitation and vibration amplitude, and determine whether the retraction condition is exceeded according to the set retraction threshold formula; Alarm module: When the retraction condition is met, it sends a retraction command to the drive control component.

10. The forced retraction system for the automotive photovoltaic roof box based on environmental sensing according to claim 8, characterized in that, The drive control component includes: Main drive unit: used to control the retraction of the roof-mounted photovoltaic panels; Secondary drive unit: used to control the retraction of the roof box subframe; Slide rail and guide rail system: Used to provide the retraction path between the photovoltaic panel and the sub-frame, ensuring smooth execution of the retraction action.

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