Electric anti-sparking structure of lithium battery of unmanned aerial vehicle

Abstract

The utility model provides a lithium battery electricity anti-sparking structure of an unmanned aerial vehicle. The lithium battery electricity anti-sparking structure comprises a lithium battery assembly, an electricity taking socket, two conducting rods and a variable resistor. A power transmission plug is arranged at the bottom of the lithium battery assembly, conductive sleeves are arranged on the two sides of the lithium battery assembly respectively, and the two conductive sleeves are conducted with the positive electrode and the negative electrode of the lithium battery assembly respectively; the power taking socket is arranged on the machine body, is conducted with a circuit of the machine body, and is conducted with the power transmission plug in a plugging manner; the two conducting rods are connected to the machine body and are respectively connected and conducted with the electricity taking socket; the variable resistor is connected in series between one conducting rod and the electricity taking socket; wherein the two conducting rods and the two conducting sleeves are used for being correspondingly conducted before the electricity taking socket and the power transmission plug are plugged and conducted, so that a current loop is formed among the lithium battery assembly, the variable resistor and the machine body circuit. The electric anti-sparking structure for the lithium battery of the unmanned aerial vehicle provided by the utility model can reduce the instantaneous current change when the loop is connected, and effectively prevents the lithium battery from sparking.

Description

Technical Field

[0001] The utility model belongs to the field of multi-rotor unmanned aerial vehicles, and in particular relates to an unmanned aerial vehicle lithium battery anti-ignition structure. Background Art

[0002] Most drone batteries use lithium batteries. Compared with ordinary batteries, lithium batteries have the advantages of high rate, high energy ratio, high performance, high safety, long life, environmental protection, no pollution, and light weight. In terms of shape, lithium batteries have ultra-thin characteristics and can be made into lithium batteries of different shapes and capacities to meet the needs of certain products. When using lithium batteries, anti-ignition measures must be taken.

[0003] The existing anti-fire measures for drones are mainly the opening and closing circuits controlled by MOS tubes. The closing of the MOS tube circuit is controlled by an external switch. This method is suitable for small multi-rotor drones powered by small currents. For drones that require larger currents, this measure will have the risk of burning the circuit. Utility Model Content

[0004] The embodiment of the utility model provides a lithium battery anti-ignition structure for drones, aiming to solve the problem that the anti-ignition measures in the prior art are imperfect and large currents are prone to burn out the drone circuit.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a lithium battery anti-ignition structure for a drone, including a lithium battery assembly, a power socket, two conductive rods and a variable resistor; a power transmission plug is provided at the bottom of the lithium battery assembly, and conductive sleeves are provided on both sides, and the two conductive sleeves are respectively connected to the positive and negative poles of the lithium battery assembly; the power socket is arranged on the body and is connected to the body circuit, and the power socket is connected to the power transmission plug by plugging; two conductive rods are connected to the body, and are respectively connected to the power socket; the variable resistor is connected in series between one of the conductive rods and the power socket; wherein the two conductive rods and the two conductive sleeves are used to be correspondingly connected before the power socket is connected to the power transmission plug by plugging, so as to form a current loop between the lithium battery assembly, the variable resistor and the body circuit.

[0006] In a possible implementation, the lithium battery assembly includes a battery shell and a battery core, the battery shell is disposed on the battery core, and the positive and negative electrodes of the battery core are respectively connected to two conductive sleeves.

[0007] In a possible implementation, the conductive sleeve includes a plug-in and a guide member; the plug-in is arranged on the side wall of the battery shell, and a first conductive hole suitable for the conductive rod to pass through is provided on the plug-in; the guide member is located below the plug-in and fixedly connected to the battery shell.

[0008] In a possible implementation, a guide hole is provided on the guide member, and a bottom radius of the guide hole is greater than a top radius of the guide hole.

[0009] In a possible implementation, an elastic member is provided in the first conductive hole, and the elastic member is connected to the lithium battery and the conductive rod respectively.

[0010] In a possible implementation, the bottoms of the two conductive rods are connected to connecting pieces, and the connecting pieces are fixedly connected to the body.

[0011] In a possible implementation manner, a second conductive hole suitable for the bottom of the conductive rod to pass through is provided on the connecting member.

[0012] In a possible implementation, the conductive sleeve is further provided with a protective sleeve suitable for the conductive rod to extend into.

[0013] In a possible implementation, a fuse is provided inside the battery housing, and the fuse is connected to the battery core.

[0014] In a possible implementation, a top cover is provided on the top of the battery housing.

[0015] The beneficial effect of the lithium battery anti-ignition structure for unmanned aerial vehicles provided by the utility model is that: compared with the prior art, the utility model can connect the conductive sleeve on the lithium battery assembly and the conductive rod on the body through plugging and conducting, so that a variable resistor can be connected in the current loop before the power socket and the power transmission plug are plugged and conducted. The variable resistor can increase the resistance in the loop and make a smaller current exist in the current loop, so that the instantaneous current change after the power transmission plug and the power socket are plugged in can be smoother, and the risk of lithium battery ignition caused by the instantaneous increase of current in the current loop when the power transmission plug and the power socket are plugged in can be effectively avoided, which is beneficial to protecting the circuit; the variable resistor can change its own resistance. When lithium batteries of different voltages are connected inside the battery shell, the current in the loop can be reduced by adjusting its own resistance, thereby improving the applicability of the anti-ignition structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of the lithium battery anti-ignition structure for a drone provided by an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of the side view of the lithium battery anti-ignition structure of a drone provided by an embodiment of the utility model;

[0018] Figure 3 A schematic diagram of the side view of the conductive sleeve used in the lithium battery anti-ignition structure of the drone provided by the embodiment of the utility model;

[0019] Figure 4 A schematic diagram of the explosion structure of the conductive sleeve used in the lithium battery anti-ignition structure of the drone provided by the embodiment of the utility model;

[0020] Figure 5 A schematic diagram of the three-dimensional structure of the body used in the lithium battery anti-ignition structure of the drone provided by the embodiment of the utility model;

[0021] Figure 6 A schematic diagram of the top view of the battery shell used in the lithium battery anti-ignition structure of the drone provided by the embodiment of the utility model;

[0022] In the figure: 10, lithium battery assembly; 11, power transmission plug; 12, conductive sleeve; 13, battery shell; 14, battery core; 15, plug-in; 151, first conductive hole; 16, guide member; 161, guide hole; 17, elastic member; 18, protective cover; 20, power socket; 30, conductive rod; 31, connecting member; 311, second conductive hole; 40, variable resistor; 50, fuse; 60, top cover; 70, body. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0025] Please also read Figures 1 to 6, the UAV lithium battery anti-ignition structure provided by the utility model is now described. The UAV lithium battery anti-ignition structure includes a lithium battery assembly 10, a power socket 20, two conductive rods 30 and a variable resistor 40; a power transmission plug 11 is provided at the bottom of the lithium battery assembly 10, and conductive sleeves 12 are provided on both sides, and the two conductive sleeves 12 are respectively connected to the positive and negative poles of the lithium battery assembly 10; the power socket 20 is arranged on the body 70, and is connected to the circuit of the body 70, and the power socket 20 is connected to the power transmission plug 11 by plugging; two conductive rods 30 are connected to the body 70, and are respectively connected to the power socket 20 for conduction; the variable resistor 40 is connected in series between one of the conductive rods 30 and the power socket 20; wherein the two conductive rods 30 and the two conductive sleeves 12 are used to be correspondingly connected before the power socket 20 is connected to the power transmission plug 11 for conduction, so that a current loop is formed between the lithium battery assembly 10, the variable resistor 40 and the circuit of the body 70.

[0026] It should be noted that the variable resistor 40 can be a film type variable resistor, which uses a rotary adjustment method to change its own resistance value. The principle of anti-sparking is to first connect the variable resistor 40 to reduce the current in the series current loop so that there is a smaller current in the loop, and then connect the power transmission plug 11 and the power socket 20. At this time, the variable resistor 40 is short-circuited, and the lithium battery assembly 10 is connected to the body 70 to realize power supply. The conductive sleeve 12 enables the positive and negative electrodes of the lithium battery assembly 10 to be electrically connected to the two conductive rods 30 respectively, so that the lithium battery assembly 10 can form a loop with the variable resistor 40 and the power socket 20 through the conductive sleeve 12 and the conductive rod 30; the conductive sleeve 12 can slide vertically on the conductive rod 30. When the conductive sleeve 12 is located at the top of the conductive rod 30, the lithium battery assembly 10 forms a loop with the variable resistor 40 and the power socket 20. At this time, the power transmission plug 11 and the power socket 20 are not plugged in and connected, and the current in the circuit is reduced due to the influence of the variable resistor 40. The conductive sleeve 12 slides downward along the conductive rod 30 to plug the power transmission plug 11 and the power socket 20 into connection to connect the power supply circuit.

[0027] The beneficial effect of the lithium battery anti-ignition structure for unmanned aerial vehicles provided by the utility model is that: compared with the prior art, the utility model can connect the conductive sleeve 12 on the lithium battery assembly 10 and the conductive rod 30 on the body 70 through plugging and connecting, so that the variable resistor 40 can be connected in the current loop before the power socket 20 and the power transmission plug 11 are plugged and connected. The variable resistor 40 can increase the resistance in the loop and make a smaller current exist in the current loop, which can make the instantaneous current change after the power transmission plug 11 and the power socket 20 are plugged and connected more gentle, and can effectively avoid the risk of lithium battery ignition caused by the instantaneous increase of current in the current loop when the power transmission plug 11 and the power socket 20 are plugged and connected, which is beneficial to protecting the circuit; the variable resistor 40 can change its own resistance. When lithium batteries of different voltages are connected inside the battery shell 13, the current in the loop can be reduced by adjusting its own resistance, thereby improving the applicability of the anti-ignition structure.

[0028] In one possible implementation, see Figure 1 and Figure 2 The lithium battery assembly 10 includes a battery shell 13 and a battery core 14 . The battery shell 13 is disposed on the battery core 14 . The positive and negative electrodes of the battery core 14 are respectively connected to the two conductive sleeves 12 .

[0029] It should be noted that after replacing the battery cell 14 inside the battery shell 13, the actual resistance of the variable resistor 40 is adjusted according to the actual voltage of the battery cell 14 so that the current in the circuit is always kept within a reasonable range, which is beneficial to improving the applicability of anti-sparking.

[0030] In one possible implementation, see Figures 2 to 4 The conductive sleeve 12 includes a plug-in 15 and a guide 16; the plug-in 15 is arranged on the side wall of the battery shell 13, and a first conductive hole 151 suitable for the conductive rod 30 to pass through is provided on the plug-in 15; the guide 16 is located below the plug-in 15 and is fixedly connected to the battery shell 13.

[0031] It should be noted that there are two plug-ins 15, each of which is provided with a first conductive hole 151. The first conductive hole 151 enables the plug-in 15 to move vertically on the conductive rod 30 while limiting the movement of the plug-in 15 in other directions, which plays a certain guiding role in the plug-in connection between the plug-in 15 and the conductive rod 30, so that the lithium battery assembly 10 always remains vertical during the process of sliding downward along the conductive rod 30, which is conducive to the effective plug-in connection between the power transmission plug 11 and the power socket 20; the guide member 16 has the function of making it easy to put the plug-in 15 on the conductive rod 30, reducing the installation error rate of the lithium battery assembly 10 and improving work efficiency.

[0032] In one possible implementation, see Figure 3 The guide member 16 is provided with a guide hole 161 , and the bottom radius of the guide hole 161 is greater than the top radius of the guide hole 161 .

[0033] It should be noted that the guide hole 161 is aligned with the first conductive hole 151. When the guide hole 161 guides the guide member 16 to be sleeved on the conductive rod 30, the first conductive hole 151 can also be smoothly aligned with the conductive rod 30. The inner diameter of the guide hole 161 is larger at the lower end and gradually decreases upward. The larger guide hole 161 at the lower end enables the guide member 16 to correct the deviation between the conductive rod 30 and the guide hole 161 when the conductive rod 30 is sleeved, thereby avoiding repeated operations during the installation of the lithium battery assembly 10, reducing the installation time, and making the lithium battery installation more applicable.

[0034] In one possible implementation, see Figure 4 An elastic member 17 is disposed in the first conductive hole 151 , and the elastic member 17 is connected to the lithium battery and the conductive rod 30 respectively.

[0035] It should be noted that the elastic member 17 can be a crown spring floatingly arranged in the first conductive hole 151. The crown spring has a relatively large force-bearing surface and can withstand large extrusion and tensile forces. The positive and negative electrodes of the lithium battery assembly 10 are lead-out cables and connected to the elastic member 17. The conductive rod 30 contacts the elastic member 17 to guide the current through the variable resistor 40, which is beneficial to protecting the circuit.

[0036] In one possible implementation, see Figure 5 The bottoms of the two conductive rods 30 are connected with connecting pieces 31 , and the connecting pieces 31 are fixedly connected to the body 70 .

[0037] It should be noted that the connecting piece 31 allows the conductive rod 30 to be suspended and fixed, and there is a certain distance between the bottom of the conductive rod 30 and the body 70, so as to avoid the conductive rod 30 and the body 70 from contacting to form a loop and causing the UAV casing to be electrified, thereby preventing safety hazards, facilitating the normal use of the anti-fire structure, and protecting the circuit.

[0038] In one possible implementation, see Figure 5 The connecting member 31 is provided with a second conductive hole 311 suitable for the bottom of the conductive rod 30 to pass through.

[0039] It should be noted that the inner diameter of the second conductive hole 311 is slightly smaller than the diameter of the conductive rod 30. In order to allow the conductive rod 30 to pass through the second conductive hole 311 smoothly, the diameter of a section of the conductive rod 30 close to the bottom is smaller than the diameter of the entire conductive rod 30, so that the bottom of the conductive rod 30 can pass through the second conductive hole 311 smoothly, and the two sections of the conductive rod 30 with different diameters can form a table in the middle, so that the conductive rod 30 can abut against the upper surface of the connecting piece 31, preventing the conductive rod 30 from sliding downward and causing the bottom of the conductive rod 30 to contact the body 70 and cause the body 70 to be charged; the opposite side of the two connecting pieces 31 is open, so that the bottom of the conductive rod 30 is exposed, which is conducive to leading out the cable from the bottom of the conductive rod 30 and connecting it to the variable resistor 40, so that the anti-spark structure can be used normally.

[0040] In a possible implementation, the conductive sleeve 12 is further provided with a protective sleeve 18 suitable for the conductive rod 30 to extend into.

[0041] It should be noted that the protective cover 18 is arranged above the plug-in 15 and has an inner cavity aligned with the first conductive hole 151. When the conductive cover 12 slides downward along the conductive rod 30, it can cover the top of the conductive rod 30. After the conductive rod 30 is connected to the circuit, it plays a role in shielding the conductive rod 30 to prevent the operator from accidentally touching the conductive rod 30 with current and causing safety hazards; the inner cavity of the protective cover 18 has a certain length to prevent the top of the conductive rod 30 from abutting against the inner wall of the inner cavity when the plug-in 15 slides downward along the conductive rod 30, thereby hindering the connection between the power transmission plug 11 and the power socket 20 and affecting the power supply.

[0042] In one possible implementation, see Figure 6 A fuse 50 is provided inside the battery shell 13 , and the fuse 50 is connected to the battery core 14 .

[0043] It should be noted that the main function of the fuse 50 is to protect the drone from overcurrent and overheating. The fuse 50 is arranged inside the battery shell 13 and connected in series to the current loop. When the current abnormally rises to a certain height and temperature, the fuse 50 will melt and cut off the current to protect the safe operation of the circuit.

[0044] In one possible implementation, see Figure 1 A top cover 60 is provided on the top of the battery shell 13 .

[0045] It should be noted that the top of the battery shell 13 has an opening, so that battery cells 14 of different voltages can be installed into the interior of the battery shell 13 from the upper opening of the battery shell 13. The top cover 60 provided on the top of the battery shell 13 can seal the internal space of the battery shell 13 after the battery cell 14 is installed into the battery shell 13, thereby preventing the external environment from interfering with the battery cell 14 inside the battery shell 13, which is beneficial to protecting the circuit loop.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The UAV lithium battery anti-ignition structure is characterized by: include: The lithium battery assembly has a power transmission plug at the bottom and conductive sleeves on both sides, and the two conductive sleeves are respectively connected to the positive and negative electrodes of the lithium battery assembly; A power socket is arranged on the machine body and is connected to the circuit of the machine body. The power socket is connected to the power transmission plug; Two conductive rods are connected to the body and are respectively connected to the power sockets for conduction; A variable resistor is connected in series between one of the conductive rods and the power socket; Among them, the two conductive rods and the two conductive sleeves are used to be connected correspondingly before the power socket and the power transmission plug are plugged in and connected, so as to form a current loop between the lithium battery assembly, the variable resistor and the body circuit.

2. The UAV lithium battery anti-ignition structure as claimed in claim 1, characterized in that: The lithium battery assembly comprises a battery shell and a battery core, wherein the battery shell is disposed on the battery core and the positive and negative electrodes of the battery core are respectively connected to the two conductive sleeves.

3. The UAV lithium battery anti-ignition structure as claimed in claim 2, characterized in that: The conductive sleeve includes a plug-in and a guide member; the plug-in is arranged on the side wall of the battery shell, and a first conductive hole suitable for the conductive rod to pass through is provided on the plug-in; the guide member is located below the plug-in and fixedly connected to the battery shell.

4. The UAV lithium battery anti-ignition structure as claimed in claim 3, characterized in that: The guide member is provided with a guide hole, and the bottom radius of the guide hole is greater than the top radius of the guide hole.

5. The UAV lithium battery anti-ignition structure as claimed in claim 3, characterized in that: An elastic member is disposed in the first conductive hole, and the elastic member is connected to the battery core and the conductive rod respectively.

6. The UAV lithium battery anti-ignition structure as claimed in claim 1, characterized in that: The bottoms of the two conductive rods are connected with connecting pieces, and the connecting pieces are fixedly connected to the machine body.

7. The UAV lithium battery anti-ignition structure as claimed in claim 6, characterized in that: The connecting piece is provided with a second conductive hole suitable for the bottom of the conductive rod to pass through.

8. The UAV lithium battery anti-ignition structure as claimed in claim 1, characterized in that: The conductive sleeve is also provided with a protective sleeve suitable for the conductive rod to extend into.

9. The UAV lithium battery anti-ignition structure as claimed in claim 2, characterized in that: A fuse is arranged inside the battery shell, and the fuse is connected to the battery core.

10. The UAV lithium battery anti-ignition structure as claimed in claim 2, characterized in that: A top cover is provided on the top of the battery shell.

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