Quick-release battery protection equipment

By designing a quick-disassembly battery protection device, the problem of cumbersome, time-consuming and high risk of human errors in the UAV battery replacement process is solved, and the rapid and simple battery replacement is achieved, improving the operating efficiency and safety of the UAV.

CN222463273UActive Publication Date: 2025-02-11四川青程融创科技有限公司
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Patent Information

Application Number
CN202420672930.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-03
Publication Date
2025-02-11
Estimated Expiration
2034-04-03

AI Technical Summary

Technical Problem

The battery replacement process of existing drone is cumbersome, time-consuming and has a high risk of human error, which affects the operating efficiency, safety and stability of the drone.

Method used

A quick-release battery protection device is designed, including a detachable protective cover, a symmetrically arranged assembly barrel, a slidingly mounted pin, a spring and a pull-up ring, and a heat dissipation mechanism for ventilation and heat dissipation.

Benefits of technology

By optimizing the structural design of the protective cover, fast and simple battery replacement operation is achieved, the operation efficiency of the drone is improved, the risk of human error is reduced, and the stability and safety of the drone is improved through the cooling mechanism.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model is applicable to the technical field of unmanned aerial vehicles, and provides quick-release battery protection equipment which comprises a detachable protection cover arranged at the top of a battery bin of an unmanned aerial vehicle body, the assembly cylinders are symmetrically arranged on the two sides of the protective cover; the pin rod is mounted in the assembly cylinder in a sliding manner and is used for limiting; one end of the pin rod is clamped with the unmanned aerial vehicle body; the spring is sleeved on the pin rod; the pull ring is fixed at the other end of the pin rod; and the heat dissipation mechanism is arranged on the protective cover and is used for ventilation and heat dissipation. The quick-release battery protection equipment provided by the scheme is simple and convenient to detach, and solves the problem that the battery replacement of the conventional unmanned aerial vehicle is relatively tedious.
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Description

Technical Field

[0001] The utility model belongs to the technical field of unmanned aerial vehicles, and in particular relates to a quick-detachable battery protection device. Background Art

[0002] With the continuous development of smart cities and the widespread application of drone technology, drones are playing an increasingly important role in environmental monitoring, traffic management, urban planning and other fields; however, during the continuous use of drones, batteries, as their core energy supply components, their performance and safety have become key factors restricting the improvement of drone performance and the expansion of their application scope.

[0003] However, in existing drone designs, the battery replacement process is often cumbersome and time-consuming. In particular, when removing the battery compartment protective cover, operators need to spend a lot of time to complete it. This not only affects the operating efficiency of the drone, but also may increase the risk of human error due to long-term operation, thereby affecting the safety and stability of the drone. Utility Model Content

[0004] The utility model provides a quick-detachable battery protection device, which aims to solve the problems of cumbersomeness, time-consuming and high risk of human error in the current unmanned aerial vehicle battery replacement process.

[0005] The utility model is implemented as follows: a quick-release battery protection device comprises: a detachable protection cover arranged on the top of the battery compartment of an unmanned aerial vehicle body; assembly cylinders symmetrically arranged on both sides of the protection cover; a pin rod slidably installed in the assembly cylinder for limiting position, one end of the pin rod being clamped with the unmanned aerial vehicle body; a spring sleeved on the pin rod; a pull ring fixed on the other end of the pin rod; and a heat dissipation mechanism arranged on the protection cover for ventilation and heat dissipation.

[0006] Preferably, the heat dissipation mechanism includes: a heat-conducting fin plate fixed to the bottom of the protective cover, the bottom end of the heat-conducting fin plate is in contact with the outer shell of the battery; a plurality of heat dissipation holes opened on the protective cover; a mounting tube fixed to the top of the protective cover; a bracket fixed in the mounting tube; and a heat dissipation fan mounted on the bracket.

[0007] Preferably, a detachable shielding plate for sun protection and rain protection is provided on the top of the protective cover, a plurality of connecting rods are symmetrically fixedly installed on the bottom of the shielding plate, a plurality of groove blocks adapted to the connecting rods are symmetrically fixedly installed on the top of the protective cover, and a plurality of the groove blocks are provided with bolts for limiting the connecting rods, and the corresponding bolt threads pass through the connecting rods.

[0008] Preferably, a limiting block for limiting is symmetrically fixedly mounted on the bottom of the protective cover, and a limiting groove matched with the limiting block is symmetrically opened on the top of the drone body.

[0009] Preferably, a pressing sheet for compressing the spring is fixedly mounted on the pin rod, and a limiting hole for inserting one end of the pin rod is provided on the drone body.

[0010] Preferably, a connecting frame for assembling the assembling cylinder is fixedly mounted on the protection cover, and one end of the connecting frame is fixedly connected to the assembling cylinder.

[0011] Preferably, the limit block is provided with an inserting hole, the inserting hole is adapted to the pin rod, and both ends of the assembly cylinder are provided with sliding holes for the pin rod to slide.

[0012] Compared with the related art, the quick-release battery protection device provided by the utility model has the following beneficial effects:

[0013] By optimizing the structural design of the protective cover, a quick and easy battery replacement operation is achieved; this not only improves the operating efficiency of the UAV, but also reduces operator fatigue and the risk of human error. At the same time, the heat dissipation mechanism of the equipment also helps to improve the stability and safety of the UAV. Therefore, this equipment is of great significance to improving the overall performance and safety of the UAV. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the main structure of a quick-release battery protection device provided by the utility model;

[0015] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0016] Figure 3 for Figure 2 An enlarged structural diagram of part A shown in FIG.

[0017] Figure 4 It is a structural schematic diagram of the shielding plate and the connecting rod in the utility model.

[0018] Figure numerals: 1. protective cover; 2. assembly cylinder; 3. pin rod; 4. spring; 5. pull ring; 6. heat-conducting fin plate; 7. heat dissipation hole; 8. installation cylinder; 9. bracket; 10. cooling fan; 11. shielding plate; 12. connecting rod; 13. groove block; 14. bolt; 15. limit block; 16. pressing sheet. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] The utility model provides a quick-release battery protection device, such as Figure 1-4 As shown, the quick-release battery protection device includes: a detachable protective cover 1 arranged on the top of the battery compartment of the drone body; assembly cylinders 2 symmetrically arranged on both sides of the protective cover 1; a pin rod 3 slidably installed in the assembly cylinder 2 for limiting, one end of the pin rod 3 is clamped with the drone body; a spring 4 sleeved on the pin rod 3; a pull ring 5 fixed on the other end of the pin rod 3; and a heat dissipation mechanism arranged on the protective cover 1 for ventilation and heat dissipation.

[0022] It should be noted that in the current UAV design, the battery replacement process usually involves multiple steps and complex operations, especially in the process of removing the battery compartment protective cover. The reason why this process is cumbersome and time-consuming is mainly due to the following aspects: Complex mechanical structure: The battery compartment protective cover of many UAVs adopts a complex mechanical structure, such as screw fixation; these structures require operators to use special tools and disassemble them in a specific order, which increases the complexity and time-consuming nature of the operation; Space limitations: UAVs are usually designed to be compact and the battery compartment space is limited; this makes operators face space challenges when removing the protective cover, requiring precise and meticulous operations, otherwise it may cause damage to other parts or fail to complete the disassembly smoothly; Safety considerations: As the energy core of the UAV, the battery replacement process requires special care. When removing the battery compartment protective cover, the operator needs to ensure the safety of the battery to avoid risks such as short circuit and electric shock. This requires the operator to have professional knowledge and skills, which increases the difficulty and time-consuming nature of the operation;

[0023] Due to the existence of the above problems, the cumbersome and time-consuming battery replacement process not only affects the operating efficiency of the drone, but may also bring a series of negative effects: the long battery replacement process causes the drone to be unable to operate continuously, reducing work efficiency. In scenarios where tasks need to be performed efficiently, this delay may result in failure to complete the work on time; long-term operation can easily make operators tired and increase the risk of human error. For example, misoperation may damage the battery or other parts of the drone, and may even cause safety accidents due to improper operation; human error or improper operation may cause the battery state to be unstable or there may be safety hazards, which in turn affects the safety and stability of the drone. During the flight, these problems may cause the drone to malfunction or have accidents, causing damage to people and property;

[0024] In this embodiment, the protective cover 1 is designed to be detachable, which means that the operator can easily disassemble and install it without using complicated tools or following specific steps, which greatly simplifies the battery replacement process. The assembly cylinder 2 is symmetrically arranged on both sides of the protective cover 1, and the pin rod 3 is slidably installed in the assembly cylinder 2. One end of the pin rod 3 is engaged with the drone body, and the other end is connected to the protective cover 1 through the spring 4 and the pull ring 5. When the protective cover needs to be removed, the operator only needs to pull the pull ring 5, and the pin rod 3 can be released from the drone body, thereby realizing quick disassembly; the heat dissipation mechanism is arranged on the protective cover 1, and its main purpose is to ensure that the heat generated by the battery during operation can be dissipated in time, thereby avoiding performance degradation or safety accidents caused by heat accumulation; through Simplifying the battery replacement process, the quick-release battery protection device significantly shortens the downtime of the drone due to battery replacement, thereby improving the operating efficiency of the drone; this is especially important for drones that need to perform tasks continuously and efficiently; because the disassembly and installation process becomes simple and quick, operators do not need to spend a lot of time and energy, thereby reducing the risk of human errors caused by long-term operation; this not only improves the reliability of operation, but also helps to ensure the safety and stability of the drone; the setting of the heat dissipation mechanism helps to discharge the heat in the battery compartment in time, avoiding safety accidents caused by heat accumulation, which enhances the stability of the drone during long-term operation and provides additional safety protection for the operator and the drone itself.

[0025] In a further preferred embodiment of the utility model, the heat dissipation mechanism includes: a heat-conducting fin plate 6 fixed to the bottom of the protective cover 1, the bottom end of the heat-conducting fin plate 6 is in contact with the outer shell of the battery; a plurality of heat dissipation holes 7 are provided on the protective cover 1; a mounting tube 8 fixed to the top of the protective cover 1; a bracket 9 fixed in the mounting tube 8; and a heat dissipation fan 10 mounted on the bracket 9.

[0026] In this embodiment, the heat-conducting fin plate 6 is fixed to the bottom of the protective cover 1, and its bottom end is tightly fitted with the outer shell of the battery; this design enables the heat generated by the battery during operation to be quickly and effectively transferred to the heat-conducting fin plate 6, thereby achieving the initial diffusion of heat; a number of heat dissipation holes 7 opened on the protective cover 1 allow external air to enter and contact the heat-conducting fin plate 6, further accelerating the convection and dissipation of heat. The design of these heat dissipation holes 7 helps to improve the heat dissipation efficiency and prevent heat from accumulating inside the protective cover; the heat dissipation fan 10 is assembled on the bracket 9 fixed in the mounting tube 8; when the battery is working, the heat dissipation fan 10 will start, generate forced convection, and blow the external cold air to the heat-conducting fin plate 6, thereby accelerating the dissipation of heat. This active heat dissipation method is more efficient than relying solely on natural convection, and can more effectively reduce the battery temperature; prevent the battery from degrading performance or causing safety accidents due to overheating; good heat dissipation performance helps to ensure the stability of the drone during long-term operation, avoid performance fluctuations or failures of the drone due to battery overheating, and improve the overall reliability of the drone.

[0027] In a further preferred embodiment of the utility model, a detachable shielding plate 11 for sunshade and rainproof is provided on the top of the protective cover 1, a plurality of connecting rods 12 are symmetrically fixedly installed on the bottom of the shielding plate 11, a plurality of groove blocks 13 adapted to the connecting rods 12 are symmetrically fixedly installed on the top of the protective cover 1, a plurality of the groove blocks 13 are provided with bolts 14 for limiting the connecting rods 12, and the corresponding bolts 14 are threadedly passed through the connecting rods 12.

[0028] In this embodiment, the shielding plate 11 is connected to the groove block 13 at the top of the protective cover 1 through the connecting rod 12 at the bottom. When the shielding plate 11 needs to be installed, it is only necessary to align the connecting rod 12 with the groove block 13 and insert it, and then fix it with the bolt 14. When removing it, it is only necessary to rotate the bolt 14 counterclockwise to loosen it from the connecting rod 12. This design makes the installation and removal of the shielding plate 11 simple and quick, and is convenient for users to use it flexibly under different weather conditions. The bolt 14 thread runs through the connecting rod 12 and is fixed on the groove block 13, so as to limit the connecting rod 12. This structure ensures that the shielding plate 11 can be firmly fixed on the protective cover 1 after installation. Not easy to fall off or shake; the shielding plate 11 can effectively block the sunlight, reduce the temperature in the battery compartment, and prevent the battery from performance degradation or damage due to overheating, which is particularly important for the UAV working in summer or high temperature environment; on rainy days or in humid environments, the shielding plate 11 can effectively prevent rainwater from entering the battery compartment and protect the battery from moisture and corrosion, which extends the service life of the battery and reduces safety risks such as circuit short circuit caused by rainwater; by adding the shielding plate 11, the battery protection equipment of the UAV can be used in a wider range of weather conditions, which improves the adaptability and reliability of the equipment, which is of great significance for the UAV to perform tasks in complex and changeable environments.

[0029] In a further preferred embodiment of the utility model, a limiting block 15 for limiting is symmetrically fixedly installed on the bottom of the protective cover 1, and a limiting groove adapted to the limiting block 15 is symmetrically opened on the top of the drone body.

[0030] In this embodiment, when installing the protective cover 1, the operator only needs to align the protective cover 1 with the top of the drone body and then slowly press it down. During this process, the limit blocks 15 at the bottom of the protective cover 1 will naturally slide into the limit grooves on the top of the drone body; once the limit blocks 15 are completely inserted into the limit grooves, they will play a limiting role to ensure that the protective cover 1 will not move on the drone body. This design effectively prevents the protective cover 1 from accidentally falling off or shifting due to vibration or external forces during the operation of the drone; through the cooperation of the limit blocks 15 and the limit grooves, the connection between the protective cover 1 and the drone body is more stable and not easily affected by external factors. This ensures that the UAV will not be affected by the loosening or falling off of the protective cover 1 during operation; the design of the limit block 15 and the limit groove enables the protective cover 1 to be accurately positioned at the predetermined position during installation, avoiding deviation or misalignment caused by improper installation, which is crucial to ensuring the overall performance and safety of the UAV; due to the cooperation of the limit block 15 and the limit groove, the installation process of the protective cover 1 becomes simpler and faster; the operator does not need to use additional tools or make complicated adjustments, but only needs to align and press down the protective cover 1, which not only improves the installation efficiency, but also reduces the risk of human error caused by improper operation.

[0031] In a further preferred embodiment of the utility model, a pressing piece 16 for pressing the spring 4 is fixedly mounted on the pin rod 3, and a limiting hole for inserting one end of the pin rod 3 is provided on the drone body.

[0032] In this embodiment, one end of the pin rod 3 is fixed to the protective cover 1 by a pressing piece 16, and the other end is inserted into the limiting hole on the drone body. When the protective cover 1 is installed on the drone body, the pin rod 3 will be inserted into the limiting hole; the pressing piece 16 is tightly attached to the spring 4, and when the pin rod 3 is inserted into the limiting hole, the pressing piece 16 will squeeze the spring 4, causing the spring 4 to generate a certain compression force; this compression force not only helps to maintain the stability of the pin rod 3 in the limiting hole, but also provides a certain resistance when the protective cover 1 needs to be removed to prevent the pin rod 3 from accidentally falling off; the design of the limiting hole allows the pin rod 3 to have a clear positioning point when inserted, ensuring that the connection between the pin rod 3 and the drone body is accurate; at the same time, the limiting hole can also limit the insertion depth of the pin rod 3, Prevent instability caused by the pin rod 3 being inserted too deeply or too shallowly; through the cooperation of the pressing plate 16 and the spring 4 and the design of the limit hole, the connection between the pin rod 3 and the drone body is more stable and reliable, which helps to reduce the loosening or falling off of the connection caused by vibration or external forces; the pin rod 3 is fixed to the protective cover 1 by the pressing plate 16, making the installation and removal process simple and quick. The operator only needs to align the protective cover 1 with the drone body and gently press down or lift up to complete the installation or removal operation without using additional tools or making complicated adjustments; this improved design not only improves the overall performance and safety of the drone battery protection device, but also reduces the difficulty and complexity of operation, allowing users to use and maintain the drone more conveniently.

[0033] In a further preferred embodiment of the utility model, a connecting frame for assembling the assembling cylinder 2 is fixedly mounted on the protection cover 1 , and one end of the connecting frame is fixedly connected to the assembling cylinder 2 .

[0034] In this embodiment, during the manufacturing or assembly process, the assembly cylinder 2 is first fixedly connected to one end of the connecting frame. Subsequently, the connecting frame is fixedly mounted on the protective cover 1 together with the assembly cylinder 2; this connection method can ensure that the relative position between the assembly cylinder 2 and the protective cover 1 is accurate and stable; the connecting frame, as a bridge between the assembly cylinder 2 and the protective cover 1, not only provides additional support and stability, but also enables the assembly cylinder 2 to be more firmly fixed on the protective cover 1. This helps to prevent the assembly cylinder 2 from loosening or falling off during the use of the drone; through the design of the connecting frame, the connection between the assembly cylinder 2 and the protective cover 1 is more stable and not easily affected by external forces. This helps to improve the overall structural strength of the drone battery protection device and ensure that the device can operate stably in harsh environments; the use of the connecting frame makes the installation process of the assembly cylinder 2 simpler and faster; the operator only needs to fix the assembly cylinder 2 to the connecting frame, and then install the connecting frame as a whole on the protective cover 1; this design reduces the difficulty of assembly and improves production efficiency; by enhancing the connection stability between the assembly cylinder 2 and the protective cover 1, this embodiment helps to improve the reliability of the drone battery protection device. When the UAV works for a long time or is subjected to external impact, the connecting frame can effectively prevent the assembly tube 2 from loosening or falling off, thereby ensuring the normal operation of the equipment.

[0035] In a further preferred embodiment of the utility model, the limit block 15 is provided with an inserting hole, the inserting hole is adapted to the pin rod 3 , and both ends of the assembly tube 2 are provided with sliding holes for the pin rod 3 to slide.

[0036] In this embodiment, the plug-in block is matched with the pin rod 3. When the protective cover 1 is installed on the drone body, the pin rod 3 passes through the sliding holes at both ends of the assembly tube 2 and is inserted into the plug-in hole of the limit block 15. This plug-in method ensures the connection stability and accuracy between the pin rod 3 and the limit block 15. The two ends of the assembly tube 2 are provided with sliding holes for the pin rod 3 to slide. During the installation or removal of the protective cover 1, the pin rod 3 can slide smoothly in the sliding hole, which makes the entire installation or removal process smoother and more convenient. Through the cooperation between the plug-in block and the pin rod 3, and the sliding of the pin rod 3 in the sliding hole of the assembly tube 2, the overall structural stability of the drone battery protection device is significantly enhanced in this embodiment. This stability helps to reduce the risk of loosening or damage of the device under vibration or external force; the smooth sliding of the pin rod 3 in the sliding hole makes the installation and removal process of the protective cover 1 simpler and more efficient. The operator can quickly complete the installation or removal task without using additional tools or making complex adjustments.

[0037] To sum up, the quick-release battery protection device provided by the technical solution realizes a quick and easy battery replacement operation by optimizing the structural design of the protective cover 1; this not only improves the operating efficiency of the UAV, but also reduces the operator's fatigue and the risk of human error. At the same time, the heat dissipation mechanism of the equipment also helps to improve the stability and safety of the UAV. Therefore, the device is of great significance to improving the overall performance and safety of the UAV.

[0038] Compared with the related art, the design of the detachable protective cover 1 simplifies the battery replacement process, significantly improves the operating efficiency of the UAV, and reduces the risk of human error. Secondly, the setting of the heat dissipation mechanism effectively ensures that the heat generated by the battery during operation can be dissipated in time, avoiding performance degradation or safety accidents caused by heat accumulation, and enhancing the stability and safety of the UAV; in addition, the design of the detachable shielding plate 11 enables the equipment to adapt to different weather conditions, which not only blocks sunlight to reduce the temperature of the battery compartment, but also prevents rainwater from entering the battery compartment, thereby extending the battery life and improving the adaptability and reliability of the equipment.

[0039] It is worth noting that the circuits, electronic components and modules involved in the present utility model are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present utility model does not involve improvements to software and methods.

[0040] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the above-mentioned units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0041] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A quick-release battery protection device, characterized in that: include: A removable protective cover provided on the top of the battery compartment of the drone body; Assembly cylinders symmetrically arranged on both sides of the protective cover; A pin rod slidably mounted in the assembly tube for limiting position, one end of the pin rod being engaged with the drone body; A spring sleeved on the pin; A pull ring fixed to the other end of the pin rod; A heat dissipation mechanism is arranged on the protective cover for ventilation and heat dissipation.

2. The quick-release battery protection device according to claim 1, characterized in that: The heat dissipation mechanism comprises: A heat-conducting fin plate fixed to the bottom of the protective cover, wherein the bottom end of the heat-conducting fin plate is in contact with the outer shell of the battery; A plurality of heat dissipation holes are provided on the protective cover; a mounting cylinder fixed to the top of the protective cover; a bracket fixed in the mounting tube; A cooling fan is mounted on the bracket.

3. The quick-release battery protection device according to claim 2, characterized in that: A detachable shielding plate for sunshade and rain protection is arranged on the top of the protective cover, a plurality of connecting rods are symmetrically fixedly installed on the bottom of the shielding plate, a plurality of groove blocks adapted to the connecting rods are symmetrically fixedly installed on the top of the protective cover, a plurality of the groove blocks are provided with bolts for limiting the connecting rods, and the corresponding bolt threads pass through the connecting rods.

4. The quick-release battery protection device according to claim 3, characterized in that: The bottom of the protective cover is symmetrically fixed with a limiting block for limiting, and the top of the drone body is symmetrically provided with limiting grooves adapted to the limiting block.

5. The quick-release battery protection device according to claim 4, characterized in that: A pressing sheet for pressing the spring is fixedly mounted on the pin rod, and a limiting hole for inserting one end of the pin rod is provided on the drone body.

6. The quick-release battery protection device according to claim 5, characterized in that: A connecting frame for assembling the assembling cylinder is fixedly mounted on the protection cover, and one end of the connecting frame is fixedly connected to the assembling cylinder.

7. The quick-release battery protection device according to claim 6, characterized in that: The limit block is provided with an inserting hole, which is matched with the pin rod, and both ends of the assembly cylinder are provided with sliding holes for the pin rod to slide.