CN220341156U

CN220341156U - Install heat abstractor's fuse and high voltage distribution box additional

Info

Publication number: CN220341156U
Application number: CN202322038589.1U
Authority: CN
Inventors: 方嘉; 李瑶; 明维; 杜朝晖
Original assignee: Wuhan Jiachen Electronic Technology Co ltd
Current assignee: Wuhan Jiachen Electronic Technology Co ltd
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-01-12
Anticipated expiration: 2033-07-31

Abstract

The utility model provides a fuse and a high-voltage distribution box with a heat dissipation device, which comprise a fuse main body, wherein bus bars are respectively arranged at two ends of the fuse main body and are connected with fuses in the fuse main body, the surfaces of the two bus bars are respectively fixedly provided with a heat radiator, and one opposite ends of the two heat radiators extend towards the direction of the fuse main body and are covered on the surface of the fuse main body. According to the fuse disclosed by the utility model, on one hand, heat at two ends of the fuse main body is conducted to the radiator through the bus plate, the radiator exchanges heat with air, so that the temperature at two ends of the fuse is reduced, and the fuse inside the fuse main body is prevented from being fused when short-time heavy current passes through, so that the fuse is prevented from being invalid. On the other hand, the heat on the surface of the fuse main body can also be subjected to heat exchange through the radiator and the air, so that the temperature of the fuse is further reduced, and the service life of the fuse is prolonged.

Description

Install heat abstractor's fuse and high voltage distribution box additional

Technical Field

The utility model relates to the technical field of fuses, in particular to a fuse with a heat dissipation device and a high-voltage distribution box.

Background

The fuse is a core component of the electric automobile, a metal conductor is used as a melt to be connected in series in a circuit, and when current exceeding the rated magnitude passes through the fuse when the current is overloaded or short-circuited, the fuse fuses due to self-heating, so that the circuit of the electric automobile is disconnected, and safety accidents are avoided.

In electric automobile, the fuse is installed in the inside of high voltage distribution box, plays the effect of insurance, because of the high voltage distribution box generally is used for the battery package inside, airtight space relatively, the electric current can be very high when the new energy automobile fills soon owing to the resistance of fuse itself is higher, cause the power of fuse very high can send a large amount of heat, and these heat if not in time carry out the heat exchange to the air, probably lead to the fuse to fuse because of the high fuse of temperature, the new energy automobile charges will stop, probably also can lose power. With the progress of the age, people are increasingly demanding to charge new energy automobiles, the charging speed is improved, charging current is required to be improved, high current means higher heat, the temperature of the fuse is also higher, and heat dissipation of the fuse is necessary.

The patent of publication No. CN218069632U discloses a install heat abstractor's fuse additional, it sets up the arc heating panel at fuse main part surface, and set up a plurality of fin on the heating panel, this mode is although can realize dispelling the heat to the fuse surface, but the inside fuse of fuse is mainly connected with the busbar at fuse both ends, the busbar is connected with other electrically conductive devices, when passing through short-time heavy current, the fuse both ends do not dispel the heat in time, can lead to the inside fuse of fuse to fuse, the fuse inefficacy, electrically conductive return circuit does not communicate, influence consumer normal use.

Disclosure of Invention

In view of the above, the utility model provides the fuse and the high-voltage distribution box with the heat dissipation device, which can timely dissipate heat at two ends of the fuse, and avoid the problem that when short-time heavy current passes, the fuse in the fuse is fused, so that the fuse fails, the conductive loop is disconnected, and the normal use of electric equipment is affected.

The technical scheme of the utility model is realized as follows:

on the one hand, the utility model provides a fuse with a heat dissipation device, which comprises a fuse main body, wherein bus bars are respectively arranged at two ends of the fuse main body, the bus bars are connected with fuses in the fuse main body, the surfaces of the two bus bars are respectively fixedly provided with a heat radiator, and one opposite ends of the two heat radiators extend towards the direction of the fuse main body and are covered on the surface of the fuse main body.

On the basis of the technical scheme, preferably, the radiator comprises a radiating seat and a plurality of radiating fins fixedly arranged on the top surface of the radiating seat, the radiating seat is provided with a first installation section and a second installation section horizontally connected with the first installation section, the first installation section is used for being fixedly connected with the busbar, the second installation section covers the surface of the fuse main body, one surface of the second installation section, far away from the radiating fins, is provided with a contact part with an arc-shaped structure, and the contact part is matched with the surface profile of the fuse main body.

Further, preferably, the length of the second mounting section is half the length of the fuse body.

On the basis of the technical scheme, preferably, a heat conducting pad is arranged between the surface of the fuse main body and the contact parts on the two second installation sections, and the heat conducting pad is made of an insulating material.

On the basis of the technical scheme, the radiator comprises a radiator body, and the radiator body comprises two second installation sections, wherein the two second installation sections are fixedly connected with each other through the clamping piece.

On the basis of the above scheme, preferably, the surface of the busbar is provided with a mounting hole, and the first mounting section is provided with a first connecting hole corresponding to the mounting hole.

Further, preferably, the copper bar is further included, one end of the copper bar is located between the first mounting section and the busbar, and the end portion of the copper bar is provided with a second connecting hole corresponding to the first connecting hole.

Still further, preferably, the fuse further comprises a bottom shell, wherein a useful arc-shaped groove is formed in the surface of the bottom shell, one side, far away from the radiator, of the fuse main body is contained in the arc-shaped groove, bolt holes are respectively formed in two ends of the bottom shell, and the bolt holes, the second connecting holes, the mounting holes and the first connecting holes are fastened and connected through bolts.

Preferably, the length direction of the radiating fins is along the length direction of the fuse main body, and a plurality of radiating fins are uniformly arranged on the radiating seat.

On the other hand, the utility model also discloses a high-voltage distribution box which comprises the fuse with the heat dissipation device

Compared with the prior art, the utility model has the following beneficial effects:

(1) According to the fuse with the heat dissipation device, disclosed by the utility model, the heat dissipaters are respectively arranged on the bus bars at the two ends of the fuse body, and the opposite ends of the two heat dissipaters extend and cover the surface of the fuse body, so that on one hand, the heat at the two ends of the fuse body is conducted to the heat dissipaters through the bus bars, the heat dissipaters exchange heat with air, the temperature at the two ends of the fuse is reduced, the fuse inside the fuse body is prevented from being fused when a short-time heavy current is passed, the fuse is prevented from being invalid, and the normal work of electric equipment is ensured. On the other hand, the heat on the surface of the fuse main body can also be subjected to heat exchange through the radiator and the air, so that the temperature of the fuse is further reduced, and the service life of the fuse is prolonged;

(2) By adding the heat conducting pad, the heat conducting capability is improved while the fuse main body is effectively contacted with the radiator, and the heat radiating efficiency of the outer surface of the fuse main body is greatly improved;

(3) Through connecting through the joint spare between two radiators, make two radiators and fuse main part equipment become whole, structural strength is more stable.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a fuse with a heat sink according to the present utility model;

FIG. 2 is an exploded view of a first view of a heat sink-attached fuse of the present disclosure;

FIG. 3 is an exploded view of a second view of the heat sink-attached fuse of the present disclosure;

reference numerals:

1. a fuse body; 11. a busbar; 2. a heat sink; 21. a heat dissipation seat; 22. a heat sink; 211. a first mounting section; 212. a second mounting section; 2121. a contact portion; 3. a thermal pad; 4. a clamping piece; 2122. a clamping groove; 111. a mounting hole; 2111. a first connection hole; 5. a copper bar; 51. a second connection hole; 6. a bottom case; 61. an arc-shaped groove; 62. bolt holes.

Detailed Description

The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

As shown in fig. 1, in conjunction with fig. 2-3, an embodiment of the present utility model discloses a fuse with a heat dissipating device, which includes a fuse body 1, two ends of the fuse body 1 are respectively provided with a bus bar 11, the bus bar 11 is connected with a fuse wire inside the fuse body 1, it is understood that the bus bar 11 and the fuse body 1 together form the fuse, where the bus bar 11 is used for connecting with other conductive components, for example, can be electrically connected with a relay or other electrical components through a conductive element, and the whole fuse is connected in series in a conducting circuit, which is used for heating and fusing the fuse wire inside the fuse to disconnect the circuit when a large current is born for a long time.

However, in the circuit, when short-time heavy current suddenly appears, the fuse both ends can not dispel the heat in time, can lead to the inside fuse of fuse to blow, and the conductive loop does not communicate, influences the consumer normal use. Therefore, at the present stage, heat dissipation needs to be conducted on two ends of the fuse in time, so that when short-time heavy current passes through, the fuse inside the fuse is fused, a conductive loop is disconnected, and normal use of electric equipment is affected.

In order to solve the above technical problems, the solution adopted in this embodiment is: the heat sinks 2 are respectively arranged on the bus bars 11 at the two ends of the fuse main body 1, one ends, opposite to the two heat sinks 2, extend and cover the surface of the fuse main body 1, on one hand, heat at the two ends of the fuse main body 1 is conducted to the heat sinks 2 through the bus bars, the heat sinks 2 are in heat exchange with air, the temperature at the two ends of the fuse is reduced, when short-time heavy current is avoided, the fuse inside the fuse main body 1 is fused, the fuse is invalid, and normal operation of electric equipment is guaranteed. On the other hand, the heat on the surface of the fuse body 1 can be exchanged with air through the radiator 2, so that the temperature of the fuse is further reduced, and the service life of the fuse is prolonged.

In order to achieve that the heat of the end of the fuse body 1 can be transferred to the heat sink 2 through the bus bar 11, and at the same time, the heat of the surface of the fuse body 1 can also be transferred to the heat sink 2, and the heat exchange is achieved between the heat sink 2 and the air, a preferred embodiment of the heat sink 2 is shown in this embodiment.

Specifically, the radiator 2 includes a heat dissipation seat 21 and a plurality of heat dissipation fins 22 fixedly arranged on the top surface of the heat dissipation seat 21, the heat dissipation seat 21 is provided with a first installation section 211 and a second installation section 212 horizontally connected with the first installation section 211, the first installation section 211 is fixedly connected with the bus bar 11, one surface of the first installation section 211 far away from the heat dissipation fins 22 is a plane, so that the bottom surface of the first installation section 211 is fully attached to the surface of the bus bar 11, and the heat transfer efficiency of the bus bar 11 and the radiator 2 is improved.

The second mounting section 212 covers the surface of the fuse body 1, one surface of the second mounting section 212 far away from the discrete sheet is provided with a contact portion 2121 with an arc-shaped structure, and the contact portion 2121 is matched with the surface profile of the fuse body 1. By this arrangement, the contact portion 2121 can be brought into contact with at least a part of the outer surface of the fuse body 1 of the cylindrical structure, achieving heat exchange.

The heat released by the busbar 11 and the fuse body 1 is transferred to the radiating fins 22 through the radiating seat 21, and the radiating fins 22 and air exchange heat, so that the heat on the thermal fuse is taken away in time, and the temperature of the fuse is reduced.

In this embodiment, the whole radiator 2 is preferably made of aluminum alloy, so that the heat dissipation effect is stronger. Of course, other metals with stronger heat dissipation properties may be used.

Preferably, the heat sink 22 is provided along the longitudinal direction of the fuse body 1, and in this case, the heat sink 22 corresponds to a portion of the fuse body 1 where heat is generated, and the heat sink 2 has an enhanced ability to dissipate heat from the fuse body 1. The plurality of radiating fins 22 are uniformly arranged on the radiating seat 21, so that air circulation among the radiating fins 22 is smoother, and the radiating capacity of the radiator is obviously improved.

As some preferred embodiments, the second mounting section 212 has a length that is half the length of the fuse body 1. The heat dissipation device is arranged in this way, so that the two radiators 2 can uniformly exchange heat released by the fuse main body 1 with external air, the heat dissipation efficiency of the two radiators 2 is fully exerted, and the heat dissipation process of the radiators 2 is balanced.

It is noted that a certain gap exists between the two heat sinks 2, so that the two heat sinks 2 are prevented from being in contact with a short circuit.

In order to make the surface of the fuse body 1 fully contact with the heat sink 2, in this embodiment, a thermal pad 3 is disposed between the surface of the fuse body 1 and the contact portions 2121 on the two second mounting sections 212, and the thermal pad 3 is made of an insulating material, preferably thermal foam. Through increasing the heat conduction pad 3, can make the effective contact between fuse main part 1 and the radiator 2, improve the heat conduction ability, improve fuse main part 1 surface radiating efficiency greatly. The heat conduction pad 3 can realize electrical isolation between the radiator 2 and the fuse body 1 in the heat conduction process, so that short circuit is avoided.

As some preferred embodiments, the radiator further comprises a clamping piece 4, wherein the opposite ends of the two second mounting sections 212 are respectively provided with a clamping groove 2122 connected with the clamping piece 4, and the two radiators 2 are fixedly connected with the clamping grooves 2122 through the clamping piece 4. From this setting, through connecting through joint 4 between two radiators 2, make two radiators 2 and fuse main part 1 equipment become whole, structural strength is more stable.

In this embodiment, the cross section of the clamping piece 4 is i-shaped, the cross section of the clamping groove 2122 is T-shaped, and of course, the clamping piece 4 and the clamping groove 2122 can be reliably and fixedly connected with the two radiators 2 by adopting any mortise-tenon structure. In this embodiment, the clamping member 4 is made of plastic material or other insulating material, so as to prevent the two heat sinks 2 from being shorted after being connected together.

As one embodiment, the bus bar 11 is provided with a mounting hole 111 on a surface thereof, and the first mounting section 211 is provided with a first connection hole 2111 corresponding to the mounting hole 111. The heat sink 2 can be fixed to the bus bar 11 by bolts passing through the first connection holes 2111 and the mounting holes 111, thereby achieving connection of the heat sink 2 and the fuse body 1.

Because of the surface contours of the contact 2121 on the second mounting section 212 and the fuse body 1, the entire heat sink 2 does not move in the horizontal direction relative to the fuse body 1 after the first mounting section 211 and the bus bar 11 are fixedly connected.

In order to facilitate connection of the fuse body 1 with other components in the conductive circuit due to the connection of the heat sink 2 and the bus bar 11, the present embodiment further includes a copper bar 5, one end of the copper bar 5 is located between the first mounting section 211 and the bus bar 11, and an end of the copper bar 5 is provided with a second connection hole 51 corresponding to the first connection hole 2111.

Therefore, the copper bar 5 is arranged between the radiator 2 and the bus bar 11, a part of heat released by the bus bar 11 is transferred to the air through the copper bar 5, the other part of heat is transferred to the radiator 2 through the copper bar 5, and heat exchange efficiency can be further improved.

In order to fix the fuse in the device, for example, in a high-voltage distribution box, the embodiment further provides a bottom shell 6, an arc groove 61 is formed on the surface of the bottom shell 6, one side, far away from the radiator 2, of the fuse main body 1 is accommodated in the arc groove 61, bolt holes 62 are respectively formed at two ends of the bottom shell 6, the bolt holes 62, the second connecting holes 51, the mounting holes 111 and the first connecting holes 2111 are fastened and connected through bolts, the fuse can be fixed in the arc groove 61 through the arrangement of the bottom shell 6, and meanwhile, the bus bar 11, the copper bar 5, the radiator 2 and the bottom shell 6 are locked and connected through bolts, and in the embodiment, the bottom shell 6 is made of plastic materials, so that the bus bar 11 and the bottom shell 6 are electrically isolated.

The utility model also discloses a high-voltage distribution box which comprises the fuse with the heat dissipation device disclosed in the embodiment. Because both ends and the surface of above-mentioned fuse can effectually dispel the heat, when letting in short-time heavy current, because the whole radiating efficiency of fuse is higher, can avoid inside fuse to blow when passing through short-time heavy current, guarantee that high-voltage distribution box normally uses in the battery package.

The application method of the fuse with the heat dissipation device comprises the following steps:

the heat conduction pad 3 is arranged on the top surface of the fuse body 1, the first installation section 211 of the radiator 2 is fixed on the busbar 11, the contact portion 2121 of the second installation section 212 is attached to the fuse body 1 through the heat conduction pad 3, heat at two ends of the fuse body 1 is conducted to the radiator 2 through the busbar, the radiator 2 exchanges heat with air, the temperature at two ends of the fuse is reduced, and when short-time heavy current is avoided, the fuse inside the fuse body 1 is fused, so that the fuse fails. Meanwhile, heat on the surface of the fuse main body 1 can be exchanged with air through the radiator 2, so that the temperature of the fuse is further reduced, and the service life of the fuse is prolonged.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The utility model provides an install heat abstractor's fuse additional, its includes fuse main part (1), and fuse main part (1) both ends are provided with busbar (11) respectively, busbar (11) are connected its characterized in that with the inside fuse of fuse main part (1): the two bus bars (11) are respectively fixedly provided with a radiator (2), and one ends of the two radiators (2) which are opposite extend towards the direction of the fuse main body (1) and are covered on the surface of the fuse main body (1).

2. The heat sink-added fuse of claim 1, wherein: the radiator (2) comprises a radiating seat (21) and a plurality of radiating fins (22) fixedly arranged on the top surface of the radiating seat (21), the radiating seat (21) is provided with a first installation section (211) and a second installation section (212) horizontally connected with the first installation section (211), the first installation section (211) is used for being fixedly connected with the busbar (11), the second installation section (212) is covered on the surface of the fuse main body (1), one surface of the second installation section (212) far away from the discrete fins is provided with a contact part (2121) with an arc-shaped structure, and the contact part (2121) is matched with the surface profile of the fuse main body (1).

3. The heat sink-added fuse of claim 2, wherein: the second mounting section (212) has a length that is half the length of the fuse body (1).

4. A heat sink-added fuse as recited in claim 2 or 3, wherein: a heat conducting pad (3) is arranged between the surface of the fuse main body (1) and contact parts (2121) on the two second mounting sections (212), and the heat conducting pad (3) is made of an insulating material.

5. The heat sink-added fuse of claim 4, wherein: still include joint spare (4), two second installation section (212) relative one end all are provided with joint groove (2122) that are connected with joint spare (4), are connected through joint spare (4) and mutual fixed connection of joint groove (2122) between two radiators (2).

6. The heat sink-added fuse of claim 2, wherein: the surface of the busbar (11) is provided with a mounting hole (111), and the first mounting section (211) is provided with a first connecting hole (2111) corresponding to the mounting hole (111).

7. The heat sink-added fuse of claim 6, wherein: the copper busbar (5) is further included, one end of the copper busbar (5) is located between the first mounting section (211) and the busbar (11), and the end portion of the copper busbar (5) is provided with a second connecting hole (51) corresponding to the first connecting hole (2111).

8. The heat sink-added fuse of claim 7, wherein: still include drain pan (6), drain pan (6) surface is provided with useful arc groove (61), one side that radiator (2) was kept away from to fuse main part (1) holds in arc groove (61), and drain pan (6) both ends are provided with bolt hole (62) respectively, bolt hole (62), second connecting hole (51), mounting hole (111) and first connecting hole (2111) are through the bolt fastening connection.

9. The heat sink-added fuse of claim 2, wherein: the length direction of the radiating fins (22) is along the length direction of the fuse main body (1), and a plurality of radiating fins (22) are uniformly arranged on the radiating seat (21).

10. A high voltage distribution box, characterized in that: a fuse comprising a heat sink as claimed in any one of claims 1 to 9.