Miniature rapid-replacement I-type high-voltage double fuse box for vehicle

Abstract

The invention discloses an automotive miniature quick-change I-type high-voltage double-fuse box, and relates to the technical field of automobiles, the automotive miniature quick-change I-type high-voltage double-fuse box comprises an upper cover sub-assembly, a high-voltage fuse and an upper shielding layer matched with the high-voltage fuse are detachably connected in the upper cover sub-assembly, a lower cover sub-assembly is detachably connected to the lower part of the upper cover sub-assembly, and a lower shielding layer is arranged in the lower cover sub-assembly. The high-voltage fuse is located in a shielding cavity formed by the upper shielding layer and the lower shielding layer, a terminal matched with the high-voltage fuse is further arranged in the lower cover sub-assembly, and the terminal is connected with a wire extending out of the lower cover sub-assembly. The upper cover sub-assembly and the lower cover sub-assembly of the fuse box are matched in a buckling mode, the high-voltage fuse is fixed in a terminal plug-in mode, assembly is simple, manufacturing cost is low, feasibility is good, the structure is simple, safe and reliable, an upper shielding layer and a lower shielding layer form an electromagnetic shielding scheme, and the high-voltage fuse and the terminals are completely wrapped by the upper shielding layer and the lower shielding layer. The problem that an existing fuse box is poor in shielding effect is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and particularly to a vehicle-mounted micro fuse box. Background Art

[0002] At present, the proportion of new energy vehicles in the market has been increasing year by year. The increasing number and types of in-vehicle electrical appliances have led to an increase in the power of the vehicle's circuit, and the integration of the vehicle's load circuits is relatively high. The high-power circuits required on the vehicle are gradually increasing. The entire vehicle electrical power comes from the battery pack, and then is distributed by the fuse box, and then connected to each load of the circuit. The fuse box not only distributes the vehicle power, but also protects the circuit. The fuse box is a component that protects the vehicle's circuit. The main body of the traditional fuse box is usually relatively large, occupying a large space inside the vehicle. A large current passes through the fuse box and flows to the vehicle's entire circuit. When a large current passes through the parallel high-voltage fuse, a large amount of heat is locally generated at the normal high-voltage fuse connection point, which has an adverse effect on the high-voltage fuse and thus affects the safety of the entire vehicle. At the same time, the fuse is a vulnerable part, and replacing the fuse is very complicated. Most of them use the method of arranging the fuse vertically, which occupies a large vertical dimension and is not conducive to installation.

[0003] In the prior art, there is a fuse box and a fuse device disclosed in a Chinese patent with the publication number CN208970472U and the publication date of June 11, 2019. The fuse box includes an upper fuse box housing and a lower fuse box housing. A main accommodation cavity is formed in the upper fuse box housing, and through holes are formed on both sides of the main accommodation cavity in the upper fuse box housing. Conductive bolts for fixedly connecting the upper fuse box housing and the lower fuse box housing are arranged in the through holes, and a plugging cap is detachably arranged in the through holes to plug the head of the conductive bolt. In this way, the operator will not contact the conductive bolt, avoiding the risk of electric shock caused by direct contact of the body, effectively protecting the safety of personnel, and being convenient to operate and replace. A copper row installation platform is arranged outside the lower fuse box housing. Among them, the copper row installation platform forms a copper row installation space, and a copper row protection cap is detachably arranged in the copper row installation space to cover the conductive connection bolt and the copper row in the copper row installation space, so as to effectively prevent the risk of electric shock and ensure the safety of personnel and the battery pack. Although this patent can realize the replacement of the high-voltage fuse, there is still the problem that the process of replacing the fuse is still complicated and requires removing screws.

[0004] Therefore, it is very important to develop a fuse box with a simple structure, small volume and capable of quickly replacing the high-voltage fuse. Summary of the Invention

[0005] In view of the above deficiencies in the background art, the present invention provides a vehicle-mounted micro quick-replacement type I high-voltage double fuse box, which solves the problem that the high-voltage fuse in the prior art is a vulnerable part and the replacement of the high-voltage fuse is very complicated.

[0006] The technical solution of the present invention is implemented as follows: A vehicle-mounted micro rapid replacement type I high-voltage double fuse box includes an upper cover subassembly. A high-voltage fuse and an upper shielding layer cooperating with the high-voltage fuse are detachably connected within the upper cover subassembly. The lower part of the upper cover subassembly is detachably connected with a lower cover subassembly. A lower shielding layer is provided within the lower cover subassembly. The high-voltage fuse is located within a shielding cavity formed by the upper shielding layer and the lower shielding layer. A terminal cooperating with the high-voltage fuse is also provided within the lower cover subassembly, and the terminal is connected to a wire extending out of the lower cover subassembly.

[0007] Further preferably, the upper cover subassembly includes an upper cover and a fuse housing. The upper shielding layer is connected to the upper cover. The upper cover and the fuse housing are snap-fitted. An inner cover is connected to the upper shielding layer. The high-voltage fuse is installed on the inner cover and is located within the fuse housing. The fuse housing is snap-fitted onto the upper cover.

[0008] Further preferably, an annular groove is provided within the upper cover, and a sealing ring is installed within the annular groove. The sealing ring is located between the upper cover and the upper shielding layer.

[0009] Further preferably, at least two groups of fuse spring pieces for fixing the high-voltage fuse are provided on the inner cover.

[0010] Further preferably, the lower cover subassembly includes an insulating bracket cooperating with the fuse housing. A clip for installing the terminal is provided within the insulating bracket. The insulating bracket is installed within the lower shielding layer. A lower cover is snap-fitted outside the lower shielding layer. A first sealing shield, a second sealing shield, and a third sealing shield cooperating with the wire are provided on the lower cover. The first sealing shield and the second sealing shield are symmetrically arranged on both sides of the lower cover. The third sealing shield is arranged in parallel on one side of the second sealing shield. An inner metal hoop is also provided on the corresponding wire.

[0011] Further preferably, the first sealing shield includes a first shielding layer, a first sealing plug, and a first tail clip sequentially sleeved on the wire from inside to outside. The first shielding layer is located between the inner metal hoop and the terminal and cooperates with the insulating bracket. The first tail clip is fastened on the lower cover.

[0012] Further preferably, the second sealing shield includes a second shielding layer, a second sealing plug, and a second tail clip sequentially sleeved on the wire from inside to outside. The second shielding layer is located between the inner metal hoop and the terminal and cooperates with the insulating bracket. The second tail clip is fastened on the lower cover Further preferably, the third sealing shield includes a third shielding layer, a third sealing plug, and a third tail clip sequentially sleeved on the wire from inside to outside. The third shielding layer is located between the inner metal hoop and the terminal and cooperates with the insulating bracket. The third tail clip is fastened on the lower cover Further preferably, a wire channel is provided on the lower cover and is respectively matched with the first tail card, the second tail card and the third tail card. A protrusion is provided on the outer wall of the wire channel, and the first sealing plug, the second sealing plug and the third sealing plug are all hermetically arranged on the inner wall of the wire channel.

[0013] Further preferably, an installation interface is detachably connected to the lower part of the lower cover subassembly.

[0014] The beneficial effects of the present invention are as follows: 1. The upper cover subassembly and the lower cover subassembly of the fuse box of the present invention are cooperatively connected by snap connection, and the high-voltage fuse is fixed by terminal insertion. All components are installed and fixed through structural design, without additional components. Moreover, the structural design of each component also has functions of preventing misassembly and preventing mistakes, with simple assembly, low manufacturing cost, good feasibility, simple structure, and safety and reliability. An electromagnetic shielding solution is formed by the upper shielding layer and the lower shielding layer installed on the upper cover subassembly and the lower cover subassembly. The upper shielding layer and the lower shielding layer completely wrap the high-voltage fuse and the terminal, solving the problem of poor shielding effect of the existing fuse box, with safety and reliability.

[0015] 2. During the implementation process of replacing the high-voltage fuse of the fuse box, the high-voltage fuse is a vulnerable part. When the fuse is damaged and needs to be replaced, the upper cover subassembly is removed, and then the high-voltage fuse is removed from the fuse spring piece. Moreover, the high-voltage spring piece wraps the high-voltage fuse through its own elastic structure, with cheap disassembly, convenient maintenance, good conductivity and high safety.

[0016] 3. The present invention realizes the installation and fixation of each component through structural design, uses less materials, has low production cost, is horizontally fixed, has a small volume, and occupies less space in the whole vehicle. The high-voltage fuse is fixed by terminal insertion. After removing the upper cover subassembly, the high-voltage fuse is exposed, and then the high-voltage fuse can be quickly replaced, realizing the quick and safe replacement of the high-voltage fuse.

[0017] 4. The lower cover of the fuse box has a slide rail structure and a buckle structure. The fuse box is installed on the installation interface through the slide rail and cooperates with the buckle structure to horizontally fix the fuse box in space, with good stability and easy disassembly. Description of the Drawings

[0018] In order to more clearly illustrate the embodiments of the present invention, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the upper cover subassembly of the present invention; Figure 3 It is a structural schematic diagram of the lower cover sub-assembly of the present invention; Figure 4 It is a usage state diagram of the present invention.

[0020] In the figure: 1. Upper cover sub-assembly, 101. Upper cover, 102. Sealing ring, 103. Upper shielding layer, 104. Inner cover, 105. Safety spring piece, 106. Safety housing, 2. High-voltage fuse, 3. Lower cover sub-assembly, 301. First tail clamp, 302. First sealing plug, 303. First shielding layer, 304. Inner metal hoop, 305. Terminal, 306. Second tail clamp, 307. Third tail clamp, 308. Third sealing plug, 309. Second sealing plug, 310. Second shielding layer, 311. Third shielding layer, 312. Clip, 313. Insulating bracket, 314. Lower shielding layer, 315. Lower cover, 4. Installation interface. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figure 1 and Figure 4 shown, in Embodiment 1, a vehicle-mounted micro quick-change type I high-voltage double fuse box includes an upper cover sub-assembly 1. A high-voltage fuse 2 and an upper shielding layer 103 cooperating with the high-voltage fuse 2 are detachably connected inside the upper cover sub-assembly 1. The lower part of the upper cover sub-assembly 1 is detachably connected with a lower cover sub-assembly 3. A lower shielding layer 314 is provided inside the lower cover sub-assembly 3. The high-voltage fuse 2 is located in a shielding cavity formed by the upper shielding layer 103 and the lower shielding layer 314. A terminal 305 cooperating with the high-voltage fuse 2 is also provided inside the lower cover sub-assembly 3. The high-voltage fuse 2 is inserted and connected with the terminal 305. The terminal 305 is connected with a wire extending out of the lower cover sub-assembly 3. The wire is welded to the terminal 305. The wire extends out of the lower cover sub-assembly 3 to form a trailing wire connection. The connection method is simple, convenient for installation, and avoids disassembling the wire when replacing the high-voltage fuse 2.

[0023] The upper cover sub-assembly 1 and the lower cover sub-assembly 3 are snapped together to form a fuse box. The high-voltage fuse 2 is fixed by means of plugging with the terminal 305, which solves the problem that the high-voltage fuse 2 in the prior art is a vulnerable part and it is very complicated to replace the high-voltage fuse 2. All components are installed and fixed through structural design, without additional components, and the structural design of each component also has functions of preventing misoperation and preventing mistakes, with simple assembly, low manufacturing cost, good feasibility, simple structure, and safety and reliability. An electromagnetic shielding solution is formed by the upper shielding layer 103 and the lower shielding layer 314 installed on the upper cover sub-assembly 1 and the lower cover sub-assembly 3. The upper shielding layer 103 and the lower shielding layer completely wrap the high-voltage fuse 2 and the terminal 305, solving the problem of poor shielding effect of the existing fuse box, and being safe and reliable. This device can be used in the high-voltage electrical system of new energy vehicles. It is an integrally foldable multi-layer structure. This fuse box is an innovation of the common automotive fuse box, solving the problems that the traditional fuse box is usually large in size and occupies a large vertical dimension, which is not conducive to installation; at the same time, it solves the problem that the high-voltage fuse 2 is a vulnerable part and it is very complicated to replace the high-voltage fuse 2. The electromagnetic shielding effect of this fuse box is very good, improving the safety of the whole vehicle.

[0024] As Figure 2 shown, in Embodiment 2, a vehicle-mounted micro rapid replacement type I high-voltage double fuse box, which is different from the technical solution of Embodiment 1 in that the upper cover sub-assembly 1 includes an upper cover 101 and a fuse protection shell 106. The upper shielding layer 103 is connected to the upper cover 101. The upper cover 101 is snap-fitted with the fuse protection shell 106. An inner cover 104 is connected to the upper shielding layer 103. The high-voltage fuse 2 is installed on the inner cover 104 and is located inside the fuse protection shell 106. The fuse protection shell 106 is snap-fitted on the upper cover 101. The upper shielding layer 103, the inner cover 104 and the fuse protection shell 106 are successively snap-fitted on the upper cover 101, with simple installation method and easy disassembly. At the same time, the formed upper cover sub-assembly 1 is also convenient to cooperate with the lower cover sub-assembly 3. The high-voltage fuse 2 is located in the installation cavity formed by the fuse protection shell 106 and the inner cover 104. Further preferably, a groove matching with the high-voltage fuse 2 is provided on the inner cover 104 for positioning the high-voltage fuse 2 when installing the fuse protection shell 106. The high-voltage fuse 2 is cooperatively fixed on the inner cover 104 and the fuse protection shell 106, which is convenient for the high-voltage fuse 2 to cooperate with the terminal 305.

[0025] Specifically, the upper cover 101 is a rectangular structure, and the rectangular structure is fastened to the lower cover sub-assembly 3 through a fastening structure. The fastening structure is a fastening groove on the inner wall of the rectangular structure that cooperates with the protrusions on the outer wall of the lower cover sub-assembly 3, forming a fastening fit between the upper cover 101 and the lower cover sub-assembly 3. The upper shielding layer 103 and the inner cover 104 are sequentially installed inside the upper cover 101. At this time, the outer walls of both the upper shielding layer 103 and the inner cover 104 are in contact with the inner wall of the upper cover 101. Finally, the insurance housing 106 is installed on the upper cover 101. The lower part of the inner cover 104 is provided with two U-shaped plates for cooperating with the insurance housing 106 and symmetrically arranged anti-misalignment limit plates. The anti-misalignment limit plates are located between the two U-shaped plates. The outside of the U-shaped plates is provided with protrusions for increasing the installation stability, and the anti-misalignment limit plates are provided with fastening protrusions. Whether there are through holes corresponding to the terminals below the insurance housing to achieve the cooperation between the high-voltage insurance and the terminals. The middle part of the insurance housing 106 is provided with a stepped groove for cooperating with the anti-misalignment limit plate, and the stepped groove is provided with a fastening groove for cooperating with the fastening protrusions. The insurance housing 106 is installed on the inner cover 104 through the cooperation of the fastening protrusions and the fastening grooves to form a fixed chamber for fixing the high-voltage insurance 2, which can limit the high-voltage insurance and is also convenient for the installation and disassembly of the upper cover sub-assembly 1 and the high-voltage insurance 2.

[0026] In this embodiment, a ring-shaped groove is provided inside the upper cover 101, and a sealing ring 102 is installed in the ring-shaped groove. The sealing ring 102 is located between the upper cover 101 and the upper shielding layer 103. The sealing ring 102 is used to ensure the connection stability between the upper cover 101 and the upper shielding layer 103. At least two groups of insurance elastic pieces 105 for fixing the high-voltage insurance 2 are provided on the inner cover 104. The high-voltage insurance 2 is fixed on the insurance elastic pieces 105, which can fix the position of the high-voltage elastic pieces, ensure that the high-voltage insurance 2 is docked in place with the terminal 305 during installation. The high-voltage elastic pieces not only play a role in fixing the insurance but also play a role in current shunting, and at the same time, it is also convenient for the high-voltage insurance 2 to be disassembled from the upper high-voltage elastic pieces for replacement.

[0027] Specifically, when the upper shielding layer 103 is installed on the upper cover 101, the top of the upper shielding layer 103 is in contact with the inner wall of the top of the upper cover 101. A ring-shaped groove for installing the sealing ring 102 is formed between the upper shielding layer 103 and the upper cover 101. The sealing ring 102 is used to increase the connection strength and sealing performance between the upper cover 101 and the upper shielding layer 103, and prevent the upper shielding layer 103 from loosening during use. The high-voltage elastic pieces are two symmetrically arranged high-elasticity arc-shaped plates that cooperate with the high-voltage insurance 2. One end of the two arc-shaped plates is fixedly connected to the mounting plate, and the mounting plate is snap-fitted into the mounting groove on the inner cover 104.

[0028] All other structures are the same as those in Embodiment 1.

[0029] As Figure 3As shown in the figure, Embodiment 3 is a vehicle-mounted micro quick-change type I high-voltage double fuse box. The difference between its technical solution and that of Embodiment 2 is that the lower cover sub-assembly 3 includes an insulating bracket 313 that cooperates with the fuse housing 106. Inside the insulating bracket 313, there is a clip 312 for installing the terminal 305. The clip 312 is used to fix the terminal 305. The insulating bracket 313 is installed inside the lower shielding layer 314. The lower shielding layer 314 is externally buckled with a lower cover 315. On the lower cover 315, there are a first sealing shield, a second sealing shield, and a third sealing shield that cooperate with the wire. The first sealing shield and the second sealing shield are symmetrically arranged on both sides of the lower cover 315. The third sealing shield is arranged in parallel on one side of the second sealing shield. A metal inner hoop 304 is also provided on the corresponding wire. The metal inner hoop 304 is used to fix the wire so that the wire can be fixed inside the lower cover sub-assembly 3. One end of the wire is welded to the terminal 305, and the other end of the wire extends out of the lower cover 315 after passing through the insulating bracket 313, the lower shielding layer 314, and the lower cover 315 in sequence. The wire cooperates with the terminal 305. The terminal 305 is installed according to the number of high-voltage fuses 2. In this embodiment of the device, taking the installation of two parallel high-voltage fuses 2 as an example, three terminals 305 are provided. Each terminal 305 corresponds to a wire. Sealing shields are provided on the wire to ensure the sealing and shielding effect of the device when the wire is installed in a way of trailing wire.

[0030] Specifically, on the outer wall of the lower shielding layer 314, there is a first buckle that cooperates with the first buckle groove on the inner wall of the lower cover 315. The lower shielding layer 314 is installed on the lower cover 315 through the first buckle. On the inner wall of the lower shielding layer 314, there is a second buckle groove that cooperates with the second buckle on the outer wall of the insulating bracket 313. The insulating bracket 313 is buckled on the lower shielding layer 314 through the second buckle. The cooperation between the buckle and the buckle groove also has an anti-misalignment function. The insulating bracket 313, the lower shielding layer 314, and the lower cover 315 are stacked in sequence, and the tops of the stacked parts are on the same plane to ensure the sealing performance when the upper cover sub-assembly 1 and the lower cover sub-assembly 3 cooperate. The clip 312 cooperates with the limit protrusion on the inner wall of the insulating bracket 313 to be clamped inside the insulating bracket 313, thereby forming the lower cover sub-assembly 3.

[0031] In this embodiment, the first sealing and shielding member includes a first shielding layer 303, a first sealing plug 302, and a first tail clamp 301 that are sequentially sleeved on the wire from the inside to the outside. The first shielding layer 303 is located between the inner metal hoop 304 and the terminal 305 and cooperates with the insulating bracket 313. The first tail clamp 301 is buckled on the lower cover 315. The second sealing and shielding member includes a second shielding layer 310, a second sealing plug 309, and a second tail clamp 306 that are sequentially sleeved on the wire from the inside to the outside. The second shielding layer 310 is located between the inner metal hoop 304 and the terminal 305 and cooperates with the insulating bracket 313. The second tail clamp 306 is buckled on the lower cover 315. The third sealing and shielding member includes a third shielding layer 311, a third sealing plug 308, and a third tail clamp 307 that are sequentially sleeved on the wire from the inside to the outside. The third shielding layer 311 is located between the inner metal hoop 304 and the terminal 305 and cooperates with the insulating bracket 313. The third tail clamp 307 is buckled on the lower cover 315. The square shielding layer cooperates with the insulating bracket 313 to fix the wire and prevent it from detaching from the lower cover subassembly 3 during use. The sealing plug cooperates with the lower cover 315 to ensure the sealing performance of the device.

[0032] Specifically, the first shielding layer 303, the first sealing plug 302, and the first tail clamp 301 in the first sealing and shielding member are respectively a 6-sided shielding layer, a 6-sided sealing plug, and a 6-sided tail clamp. The second shielding layer 310, the second sealing plug 309, and the second tail clamp 306 in the second sealing and shielding member are respectively a 4-sided shielding layer, a 4-sided sealing plug, and a 4-sided tail clamp. The third shielding layer 311, the third sealing plug 308, and the third tail clamp 307 in the third shielding member are respectively a 2.5-sided sealing plug, a 2.5-sided shielding layer, and a 2.5-sided tail clamp. The tail clamp is detachably connected to the lower cover 315 to limit and protect the sealing plug. The shielding layer is used to fix the wire and provide shielding, enabling the wire to be fixed on the lower cover subassembly 3 and preventing the wire from being pulled externally to separate from the terminal 305, ensuring the installation effect of the wire on the lower cover subassembly 3.

[0033] In this embodiment, the lower cover 315 is provided with wire channels that respectively cooperate with the first tail clamp 301, the second tail clamp 306, and the third tail clamp 307. The outer wall of the wire channel is provided with protrusions. The first sealing plug 302, the second sealing plug 309, and the third sealing plug 308 are all hermetically arranged on the inner wall of the wire channel. The inner metal hoop 304 is located inside the channel to protect the wire. The wire channel is used to increase the contact area between the wire and the lower cover subassembly 3, thereby increasing the connection strength of the wire on the lower cover subassembly 3. The sealing plug is arranged on the wire channel to seal the wire channel and increase the sealing performance of the lower cover subassembly 3.

[0034] In this embodiment, an installation interface 4 is detachably connected below the lower cover sub-assembly 3. The installation interface 4 can be an installation interface 4 on an in-vehicle battery pack, an airborne battery pack, a marine battery pack, or a portable battery. The detachable connection between the lower cover sub-assembly 3 and the installation interface 4 facilitates the replacement of the fuse box and is easy to install.

[0035] Specifically, slide rails are provided on the lower cover 315 of the lower cover sub-assembly 3. The slide rails include two symmetrically arranged U-shaped plates. One side plate of the U-shaped plate is fixedly installed below the lower cover 315 to form a track. A limiting plate member is provided on one side of the installation interface 4. The limiting plate member and the installation interface 4 are combined into an L-shaped structure, which can limit the fuse box installed on the installation interface 4. A guide rail matching with the slide rail is provided on the installation interface 4. The guide rail is a T-shaped structure, and two limiting flanges matching with the U-shaped plates are provided above the T-shaped structure. The lower cover sub-assembly 3 forms a sliding fit with the guide rail on the installation interface 4 through the slide rail, and the installation method is simple.

[0036] All other structures are the same as those in Embodiment 2.

[0037] As Figures 1 to 4 shown, Embodiment 4, a vehicle-mounted micro rapid replacement I-type high-voltage double fuse box, a vehicle-mounted micro rapid replacement I-type high-voltage double fuse box, includes a box body; the I-type high-voltage double fuse box can be divided into an upper cover sub-assembly, a high-voltage fuse, and a lower cover sub-assembly. A sealing ring, an upper shielding layer, an inner cover, an inner cover, a fuse protection shell, and a fuse spring piece are arranged in the upper cover sub-assembly. There are grooves on the upper cover, and the sealing ring can be closely fitted with the upper cover. There are buckles in the upper cover, and the upper shielding layer is buckled with the upper cover through the buckles. The inner cover also has buckles, and through the buckles, it cooperates with the upper cover and the upper shielding layer. The fuse spring piece is fixed on the inner cover, and the fuse and current are distributed through the fuse spring piece. The inner cover sub-assembly mainly includes clips, an insulating bracket, a lower shielding layer, a lower cover, and plug-in terminals, and then is fixed on the lower cover through buckles. Plug-in terminals are fixed on the clips, and the clips also cooperate with the insulating bracket. The lower shielding layer wraps the clips and the insulating bracket, and the shielding performance is good. The fuse is placed horizontally and fixed on the vehicle by a buckling method.

[0038] The fuse box is installed on an in-vehicle battery pack, an airborne battery pack, a marine battery pack, or a portable battery. Two groups of high-voltage fuses are provided, and the two groups of high-voltage fuses are respectively inserted into the input and output ends of the power distribution line.

[0039] The upper cover sub-assembly and the lower cover sub-assembly are assembled by snap-fitting. The number of high-voltage fuses is two. The upper shell is provided with an upper cover, a sealing ring, an upper shielding layer, an inner cover, a fuse spring piece, and a fuse protective shell. The upper cover, the upper shielding layer, and the inner cover are closely fitted through their own snap structures. The sealing ring is installed in the circular groove of the upper cover. The fuse spring piece is fixed to the inner cover, and then the high-voltage fuse is fixed, and the current is divided into two paths at the same time. The so-called fuse protective shell also has the function of fixing the high-voltage fuse. The upper shielding layer is used to shield the electromagnetic field generated by the upper cover sub-assembly.

[0040] In some preferred embodiments of the discharge socket, the upper cover sub-assembly is provided with a 6-square tail card, a 6-square sealing plug, an inner metal hoop, a 6-square shielding layer, a terminal, a 2.5-square tail card, a 4-square tail card, a 4-square sealing plug, a 2.5-square sealing plug, a 2.5-square shielding layer, a 4-square shielding layer, a clip, an insulating bracket, a lower shielding layer, and a lower cover. The lower cover, the insulating bracket, and the lower shielding layer are assembled through their own snap structures. The clip is matched with the insulating bracket. The terminal and the wire are welded together by ultrasonic waves. The tail card, the sealing plug, the inner metal hoop, and the shielding layer are matched with the wire, and then the terminal is matched with the clip to ensure good airtightness and shielding performance.

[0041] In some preferred embodiments of the fuse box, the lower cover of the fuse box has a slide rail and a snap structure. The fuse box and the installation interface are paired through the slide rail structure and then fixed to the installation interface through the snap structure.

[0042] The specific embodiments are as follows: As Figure 1 shown, an exploded view of a vehicle-mounted micro quick-change type I high-voltage double fuse box, which is used to be installed in a new energy vehicle and is located in the vehicle's wiring to protect the wiring. The micro quick-change type I high-voltage double fuse box is small in size, horizontally installed, occupies a small space in the vehicle, and has good electromagnetic shielding effect of the fuse box. The high-voltage fuse can be quickly replaced. The connector box includes an upper cover sub-assembly 1, a high-voltage fuse 2, a lower cover sub-assembly 3, and an installation interface 4. The high-voltage fuse 2 is assembled with the fuse protective shell 106 and then cooperates with the lower cover sub-assembly 3 through a snap structure. At this time, the high-voltage fuse is inserted and matched with the terminal 305. The assembled fuse box is then matched with the installation interface 4 through the slide rail and the snap structure, and at this time, the fuse box is horizontally installed.

[0043] As Figure 2As shown in the figure, it is a structural diagram of the upper cover sub-assembly of a vehicle-mounted micro quick-change I-type high-voltage double fuse box. The upper cover sub-assembly 1 is paired with the lower cover sub-assembly. The upper cover sub-assembly 1 includes an upper cover 101, an upper sealing ring 102, a shielding layer 103, an inner cover 104, a fuse elastic piece 105, and a fuse housing 106. The upper sealing ring 102 is installed in the groove of the upper cover 101. The shielding layer 103 is installed in the upper cover 101 through a buckle. The inner cover 104 is installed in the shielding layer 103 through a buckle. The fuse elastic piece 105 is installed on the inner cover 104 through a buckle, and then it is paired with the fuse housing 106. The shielding layer 10 plays an electromagnetic shielding effect in the upper cover sub-assembly. The fuse elastic piece 105 not only plays a role in fixing the fuse but also plays a role in shunting. At the same time, the high-voltage fuse can be smoothly removed from above.

[0044] As Figure 3 shown in the figure, it is a structural diagram of the lower cover sub-assembly of a vehicle-mounted micro quick-change I-type high-voltage double fuse box. The lower cover sub-assembly 3 cooperates with the upper cover sub-assembly 1 and the installation interface 4. The lower cover sub-assembly 3 includes a 6-square tail card 301, a 6-square sealing plug 302, a 6-square shielding layer 303, an inner metal hoop 304, a terminal 305, a 2.5-square tail card 306, a 4-square tail card 307, a 4-square sealing plug 308, a 2.5-square sealing plug 309, a 2.5-square shielding layer 310, a 4-square shielding layer 311, a clip 312, an insulating bracket 313, a lower shielding layer 314, and a lower cover 315. The wire is first welded to the terminal 305 by ultrasonic welding, and then assembled to the clip 312. Due to the wire-out method of using a trailing wire, considering airtightness, electromagnetic shielding, and the entry of 6-square wire and the exit of 2.5-square and 4-square wires, it is necessary to use a 6-square tail card 301, a 6-square sealing plug 302, a 6-square shielding layer 303, an inner metal hoop 304, a 2.5-square tail card 306, a 4-square tail card 307, a 4-square sealing plug 308, a 2.5-square sealing plug 309, a 2.5-square shielding layer 310, and a 4-square shielding layer 311. The lower shielding layer 314 is installed in the lower cover 315, the insulating bracket 313 is installed in the lower shielding layer 314, the clip 312 is installed on the insulating bracket 313. The lower shielding layer 314 plays an electromagnetic shielding role in the lower cover sub-assembly 3 and also has the function of splitting one into two.

[0045] As Figure 4 shown in the figure, it is a structural diagram of the installation of a vehicle-mounted micro quick-change I-type high-voltage double fuse box. The lower cover sub-assembly 3 is used on the installation interface 4. The lower cover sub-assembly 3 has a slide rail and a buckle structure, and the installation interface 4 contains a structure for inserting and mating with the slide rail and the buckle. Through the insertion and mating, the fuse box can be horizontally fixed on the vehicle, and it has good stability and is easy to disassemble.

[0046] Working process: A vehicle-mounted micro quick-change type I high-voltage double-fuse box has a function of splitting one into two and can be adapted to wire diameters of 2.5 square, 4 square and 6 square. Each branch contains a fuse. When an accident occurs and the high-voltage fuse is damaged during maintenance, only the upper cover sub-assembly needs to be removed first, and then the fuse can be quickly replaced and the upper cover can be assembled. Through the design of this structure, that is, an integrated folding multi-layer structure, this fuse box solves the problems that the traditional fuse box is usually relatively large in volume and occupies a relatively large vertical dimension, which is not conducive to installation; at the same time, it solves the problem that the high-voltage fuse is a vulnerable part and the replacement of the high-voltage fuse is very complicated. The electromagnetic shielding effect of this fuse box is very good, improving the safety of the whole vehicle.

[0047] The details not elaborated in the present invention are all conventional technical means well known to those skilled in the art. The details not elaborated in the present invention are all conventional technical means well known to those skilled in the art.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A miniature quick-change I-type high-voltage dual fuse box for vehicles, characterized in that: The invention comprises an upper cover subassembly (1), wherein a high-voltage fuse (2) and an upper shielding layer (103) cooperating with the high-voltage fuse (2) are detachably connected in the upper cover subassembly (1), a lower cover subassembly (3) is detachably connected at the lower portion of the upper cover subassembly (1), a lower shielding layer (314) is provided in the lower cover subassembly (3), the high-voltage fuse (2) is located in a shielding cavity formed by the upper shielding layer (103) and the lower shielding layer (314), and a terminal (305) cooperating with the high-voltage fuse (2) is further provided in the lower cover subassembly (3), and the terminal (305) is connected to a wire extending out of the lower cover subassembly (3).

2. The vehicle-use miniature quick-change I-type high-voltage dual fuse box according to claim 1 is characterized in that: The upper cover subassembly (1) comprises an upper cover (101) and a fuse protective shell (106); an upper shielding layer (103) is connected to the upper cover (101); the upper cover (101) and the fuse protective shell (106) are snap-fitted; an inner cover (104) is connected to the upper shielding layer (103); a high-voltage fuse (2) is mounted on the inner cover (104) and is located inside the fuse protective shell (106); and the fuse protective shell (106) is snap-fitted to the upper cover (101).

3. The vehicle-use miniature quick-change I-type high-voltage dual fuse box according to claim 2 is characterized in that: An annular groove is provided in the upper cover (101), a sealing ring (102) is installed in the annular groove, and the sealing ring (102) is located between the upper cover (101) and the upper shielding layer (103).

4. The vehicle-use miniature quick-change I-type high-voltage dual fuse box according to claim 3 is characterized in that: The inner cover (104) is provided with at least two groups of safety spring pieces (105) for fixing the high-voltage safety (2).

5. The vehicle-use miniature quick-change I-type high-voltage dual fuse box according to any one of claims 1 to 4, characterized in that: The lower cover subassembly (3) comprises an insulating bracket (313) matched with the fuse housing (106); a clip (312) for mounting the terminal (305) is arranged inside the insulating bracket (313); the insulating bracket (313) is mounted inside the lower shielding layer (314); the lower shielding layer (314) is buckled with the lower cover (315) outside; the lower cover (315) is provided with a first sealing shielding component, a second sealing shielding component and a third sealing shielding component matched with the wire; the first sealing shielding component and the second sealing shielding component are symmetrically arranged on both sides of the lower cover (315); the third sealing shielding component is arranged in parallel on one side of the second sealing shielding component; and an inner metal hoop (304) is also arranged on the corresponding wire.

6. The vehicle-use miniature quick-change I-type high-voltage dual fuse box according to claim 5, characterized in that: The first sealing shielding component comprises a first shielding layer (303), a first sealing plug (302) and a first tail clamp (301) which are sequentially sleeved on the wire from the inside to the outside, the first shielding layer (303) is located between the inner metal hoop (304) and the terminal (305) and cooperates with the insulating bracket (313), and the first tail clamp (301) is buckled on the lower cover (315).

7. The vehicle-use miniature quick-change I-type high-voltage dual fuse box according to claim 6, characterized in that: The second sealed shielding component comprises a second shielding layer (310), a second sealing plug (309) and a second tail clamp (306) which are sequentially sleeved on the wire from the inside to the outside, the second shielding layer (310) is located between the inner metal hoop (304) and the terminal (305) and cooperates with the insulating bracket (313), and the second tail clamp (306) is buckled on the lower cover (315).

8. The vehicle-use miniature quick-change I-type high-voltage dual fuse box according to claim 7, characterized in that: The third sealed shielding component comprises a third shielding layer (311), a third sealing plug (308) and a third tail clamp (307) which are sequentially sleeved on the wire from the inside to the outside; the third shielding layer (311) is located between the inner metal hoop (304) and the terminal (305) and cooperates with the insulating bracket (313); and the third tail clamp (307) is buckled on the lower cover (315).

9. The vehicle-use miniature quick-change I-type high-voltage dual fuse box according to claim 8, characterized in that: The lower cover (315) is provided with wire channels respectively cooperating with the first tail card (301), the second tail card (306) and the third tail card (307), the outer walls of the wire channels are provided with protrusions, and the first sealing plug (302), the second sealing plug (309) and the third sealing plug (308) are all sealed on the inner walls of the wire channels.

10. The vehicle-use miniature quick-change I-type high-voltage dual fuse box according to any one of claims 1 to 4 and 6 to 9, characterized in that: A detachably connected installation interface (4) is provided below the lower cover sub-assembly (3).

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