Direct-current fuse for protecting electric automobile
By introducing a heat-conducting cylinder and heat dissipation fins into the DC fuse, the problem of insufficient heat dissipation is solved, rapid cooling of the electric arc is achieved, and the safety and reliability of electric vehicles are ensured.
Patent Information
- Application Number
- CN202423150350.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing DC fuses have poor heat dissipation capacity in high-temperature environments, resulting in excessively high fuse temperatures, which affects normal operation. Furthermore, the arc extinguishing speed is slow, posing a safety hazard.
A DC fuse with a heat-conducting cylinder and heat dissipation fins was designed. The heat dissipation capacity is improved by using heat-conducting metal materials and insulating plastic sleeves, and the arc is cooled by quartz sand to accelerate its extinction when the fuse is broken.
It improves the heat dissipation capacity of the melt, prevents overheating and melting, enhances the cooling rate of the electric arc, and improves the safety and reliability of the equipment.
Smart Images
Figure CN223598664U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of fuse, concretely to a direct current fuse for electric vehicle protection. BACKGROUND
[0002] The direct current fuse in electric vehicle is a kind of key circuit protection device, it plays a vital role in protecting vehicle from overload and short circuit danger, and the direct current fuse is connected in circuit, utilizes metal conductor as melt, is connected in series in circuit, when current abnormally increases, exceeds the limit of melt bearing, melt will melt under the heat of overload, to cut off current.
[0003] The existing direct current fuse generally does not have heat dissipation structure, therefore heat dissipation capacity is weak, when long time is used in high temperature environment, melt temperature can be too high, lead to melt fusing under normal working condition, influence normal use, and when circuit appears abnormal melt fusing, arc can be generated, due to the difficulty of heat dissipation, lead to the slow speed of arc extinguishing, can lead to equipment damage, and the safety is lower. SUMMARY
[0004] The utility model discloses a direct current fuse for electric vehicle protection to solve the problem in the background art.
[0005] To achieve the above object, the utility model provides the following technical scheme: a direct current fuse for electric vehicle protection, including pipe body and the contact that sets up at the both ends of pipe body, the one side of contact is integrally formed with installation portion, the outside of pipe body is equipped with heat conduction cylinder, the outside of heat conduction cylinder is equipped with a plurality of annular equidistance distribution's heat dissipation fin, the both ends of heat conduction cylinder are equipped with the pressure sleeve, the pressure sleeve is covered in the outside of pipe body and installation portion, the inner side wall of heat conduction cylinder is tightly close with the outside of pipe body, and heat conduction silicone grease is equipped between heat conduction cylinder and pipe body.
[0006] As a preferred scheme of the utility model, the inside of pipe body is equipped with melt, both ends of melt are fixedly connected with the plug block, and quartz sand is filled between pipe body and melt.
[0007] As a preferred scheme of the utility model, both ends of pipe body are equipped with fixed cap, and the middle part of fixed cap is equipped with the insertion hole matched with plug block.
[0008] As a preferred scheme of the utility model, the gasket is equipped between fixed cap and installation portion.
[0009] As a preferred scheme of the utility model, the recessed portion is symmetrically equipped on the outside of pipe body.
[0010] As a preferred scheme of the utility model, the material of the heat conduction cylinder and the heat dissipation fin is heat conduction metal, and the material of the pressing sleeve is insulating plastic.
[0011] Compared with the prior art, the utility model has the advantages that the heat conduction cylinder and the heat dissipation fin can improve the heat dissipation capacity of the pipe body, avoid the temperature of the melt being too high, ensure that the melt will not be fused off due to overheating under normal working conditions, and can quickly dissipate the heat of the electric arc generated when the melt is fused off, accelerate the cooling of the electric arc, thereby accelerating the extinction speed of the electric arc, and improve the safety. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is a three-dimensional structure schematic view of the utility model;
[0013] Figure 2 It is a sectional view of the utility model;
[0014] Figure 3 It is an explosion view of the utility model Figure 1 ;
[0015] Figure 4 It is a structure schematic view of the heat conduction cylinder after being disassembled;
[0016] Figure 5 It is a structure schematic view of the heat conduction cylinder.
[0017] In the drawing: 1, pipe body; 2, mounting portion; 3, contact; 4, heat conduction cylinder; 5, heat dissipation fin; 6, pressing sleeve; 7, gasket; 8, fixed cap; 9, recessed portion; 10, quartz sand; 11, melt; 12, plug; 13, insertion hole. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0019] Please refer to Figures 1 to 5The utility model provides a technical scheme: a direct current fuse for electric automobile protection, including pipe body 1 and the contact 3 of setting in pipe body 1 both ends, the one side integral moulding of contact 3 has installation part 2, the outside installation of pipe body 1 has heat conduction cylinder 4, the outside of heat conduction cylinder 4 is equipped with multiple annular equidistance distribution's radiating fin 5, the heat conduction of pipe body 1 will give heat conduction cylinder 4, heat conduction cylinder 4 will heat conduction give radiating fin 5, radiating fin 5 can quickly dissipate heat to the outside environment, avoid the temperature of melt 11 to be too high, ensure that melt 11 will not fuse because of overheating under normal working conditions, the both ends of heat conduction cylinder 4 are equipped with pressure sleeve 6, pressure sleeve 6 not only is used for fixing heat conduction cylinder 4 in the outside of pipe body 1, but also can be fixed between pipe body 1 and installation part 2, make installation part 2 install more firmly, pressure sleeve 6 is equipped in the outside of pipe body 1 and installation part 2, the inside wall of heat conduction cylinder 4 is close to the outside of pipe body 1, and heat conduction silicon grease is equipped between heat conduction cylinder 4 and pipe body 1, heat conduction silicon grease is used for filling the gap between heat conduction cylinder 4 and pipe body 1, avoid the air between pipe body 1 and heat conduction cylinder 4, make the heat of pipe body 1 can quickly conduction give heat conduction cylinder 4.
[0020] Wherein, the inside installation of pipe body 1 has melt 11, when the current exceeds the specified value of melt 11, melt 11 will melt under the heat action of itself, thereby automatically disconnects the circuit, both ends of melt 11 are fixedly connected with the plug block 12, pipe body 1 and melt 11 are filled with quartz sand 10, quartz sand 10 has good thermal conductivity, when melt 11 melts, the electric arc generated will burn in quartz sand 10, because the electric arc is in close contact with quartz sand 10, the electric arc is cooled well, enhances the ionization effect, so that the arc is quickly extinguished.
[0021] Wherein, both ends of pipe body 1 are equipped with fixed cap 8, the middle part of fixed cap 8 is provided with the insertion hole 13 matched with plug block 12, plug block 12 is inserted into insertion hole 13 and is welded with fixed cap 8 to ensure that melt 11 is installed firmly.
[0022] Wherein, the gasket 7 is arranged between the fixed cap 8 and the installation part 2, the gasket 7 is welded with the fixed cap 8, the gasket 7 is used for plugging the insertion hole 13, preventing the arc from being discharged out of the pipe body 1 through the insertion hole 13, and improving the safety.
[0023] Wherein, the outside of the pipe body 1 is symmetrically provided with the recess 9, and one end of the installation part 2 is crimped in the recess 9, to ensure that the installation part 2 and the pipe body 1 are fixed firmly.
[0024] Wherein, the material of the heat conduction cylinder 4 and the radiating fin 5 is heat-conducting metal, the heat-conducting metal is copper, the copper has good thermal conductivity and can quickly dissipate heat to the external environment, the material of the pressure sleeve 6 is insulating plastic, the insulating plastic is ABS plastic, the ABS plastic has good electrical insulation and is almost not affected by temperature and humidity, and has stable and reliable performance.
[0025] Specifically, in normal working conditions, the heat generated by the fuse 11 is conducted to the pipe body 1 through the fuse 11, the pipe body 1 conducts the heat to the heat conduction cylinder 4, the heat of the heat conduction cylinder 4 is quickly radiated to the external environment by the radiating fins 5, the temperature of the fuse 11 is prevented from being too high, and it is ensured that the fuse 11 will not be melted due to overheating in normal working conditions; when the current exceeds the specified value of the fuse 11, the fuse 11 will be melted under the action of the heat generated by itself, and the electric arc generated when the fuse 11 is melted will be burned in the quartz sand 10; since the electric arc is in close contact with the quartz sand 10, the electric arc is well cooled, the ionization is enhanced, and the electric arc is quickly extinguished.
[0026] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0027] In addition, the terms "first", "second", "third", "fourth" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated, so that the features with "first", "second", "third", "fourth" can be explicitly or implicitly included at least one of the features.
[0028] In the present application, unless otherwise specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connection" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specified, those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.
[0029] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A DC fuse for electric vehicle protection, comprising a tube body (1) and contacts (3) disposed at both ends of the tube body (1), wherein a mounting portion (2) is integrally formed on one side of each contact (3), characterized in that: A heat-conducting cylinder (4) is installed on the outside of the tube body (1). The heat-conducting cylinder (4) has multiple heat dissipation fins (5) arranged in a ring at equal intervals on its outside. Pressure sleeves (6) are provided at both ends of the heat-conducting cylinder (4). The pressure sleeves (6) are fitted on the outside of the tube body (1) and the mounting part (2). The inner wall of the heat-conducting cylinder (4) is in close contact with the outside of the tube body (1). Thermal grease is provided between the heat-conducting cylinder (4) and the tube body (1).
2. The DC fuse for electric vehicle protection according to claim 1, characterized in that: The tube (1) is equipped with a melt (11), and both ends of the melt (11) are fixedly connected with inserts (12). Quartz sand (10) is filled between the tube (1) and the melt (11).
3. A DC fuse for electric vehicle protection according to claim 2, characterized in that: Both ends of the tube (1) are provided with fixing caps (8), and the middle of the fixing caps (8) is provided with a socket (13) that cooperates with the plug (12).
4. A DC fuse for electric vehicle protection according to claim 3, characterized in that: A pad (7) is provided between the fixing cap (8) and the mounting part (2).
5. A DC fuse for electric vehicle protection according to claim 1, characterized in that: The outer side of the tube (1) is symmetrically provided with recesses (9).
6. A DC fuse for electric vehicle protection according to claim 5, characterized in that: The heat-conducting cylinder (4) and the heat dissipation fins (5) are made of heat-conducting metal, and the pressure sleeve (6) is made of insulating plastic.