CN217485399U - Fuse, electronic device, and power module - Google Patents

Abstract

The embodiment of the application provides a fuse, electron device and power module, wherein, the fuse includes fuse-element, heat pipe, first binding post and second binding post, the both ends of heat pipe are provided with respectively first binding post with second binding post, the heat pipe first binding post with second binding post encloses to close and forms the holding chamber, the fuse-element is located in the holding chamber, the both ends of fuse-element respectively with first binding post with second binding post electricity is connected, the fuse-element is the non-linear extension from first binding post to second binding post. According to the fuse, the electronic device and the power module, the fuse body in the fuse is designed in a non-linear mode, the size of the fuse can be reduced, the manufacturing cost of the fuse is reduced, and the space utilization rate of downstream products (such as the electronic device and the power module) is improved.

Description

Fuses, Electronics and Power Modules

technical field

The embodiments of the present application relate to the technical field of circuit protection, and in particular, to a fuse, an electronic device, and a power module.

Background technique

A fuse is a protective device that fuses the melt in the fuse with the heat generated by itself and disconnects the circuit when the current exceeds the specified value. Widely used in high and low voltage power distribution systems and control systems and electrical equipment.

In the related art, the fuse mainly includes three parts: a melt, a shell and a support. The melt is arranged in the shell, and the support on the shell is used to connect with external devices. The melt is the key element for controlling the fusing characteristics. The material, size and shape of the melt determine the fusing characteristics.

However, the fuse in the related art is limited by the requirement of heat dissipation capability. The larger the parameter of voltage or current, the larger the size of the melt, and the correspondingly larger volume of the fuse. With the continuous improvement of the power level of power modules in the industry, it is necessary to bring greater benefits to products through small-sized fuses.

Utility model content

Embodiments of the present application provide a fuse, an electronic device, and a power module, wherein by designing the melt in the fuse in a non-linear shape, the volume of the fuse can be reduced, the cost can be reduced, and downstream products (such as electronic devices, power modules, etc.) space utilization.

The embodiment of the present application provides a fuse, including: a melt, a heat pipe, a first terminal and a second terminal, the two ends of the heat pipe are respectively provided with a first terminal and a second terminal, and the heat pipe, the first terminal and the second terminal are respectively provided. A connection terminal and a second connection terminal are enclosed to form an accommodating cavity, and the melt is located in the accommodating cavity. Both ends of the melt are electrically connected to the first connection terminal and the second connection terminal, respectively. The second connection terminal extends in a non-linear shape. By changing the melt from the linear shape in the related art to the non-linear shape, the volume of the fuse can be reduced, the material cost can be reduced, the space utilization rate of downstream products (such as electronic devices, power modules, etc.) can be improved, and the greater gains. Under the condition that the fuse provided by the present application meets the safety regulations, the higher the external heat dissipation efficiency, the larger the compressible volume of the fuse.

In a possible implementation manner, the fuse may further include an arc-extinguishing medium, the arc-extinguishing medium is filled in the accommodating cavity, and the arc-extinguishing medium coats the melt. Since the arc-extinguishing medium has good thermal conductivity and arc-extinguishing ability, the practicability of the fuse can be improved, making the fuse suitable for more working conditions.

In a possible embodiment, the heat transfer pipe includes: a heat transfer pipe body and a closing member, the peripheral side of the heat transfer pipe body has an opening, the closing member closes the opening, and the opening is used for filling the accommodating cavity with an arc extinguishing medium. Due to the existence of the opening on the main body of the heat pipe, the melt can be installed from the opening, which is beneficial to improve the convenience of the assembly of the melt, and the arc-extinguishing medium can also be filled through the opening, which is convenient for operation, and the arc-extinguishing medium and the melt can be connected. Completely covered and tightly combined to solve the problem of uneven heat dissipation of the fuse.

In a possible implementation, a thermally conductive material can be selected for the sealing member. After both the melt and the arc extinguishing medium are laid from the opening of the thermally conductive pipe body into the accommodating cavity, a better thermally conductive material can be selected for the opening. Enclosed to further improve the heat dissipation function of the fuse.

In a possible embodiment, the melt in the fuse is arranged close to the peripheral side of the heat transfer pipe, so that the heat can be concentrated on one side of the heat transfer pipe, and this side can be the location of the external heat dissipation device, and the heat can be concentratedly exported The heat is quickly dissipated by the cooling device.

In a possible embodiment, the melt is a filament, a sheet or a tubular body rolled from a sheet. The filaments and sheets are in the shape of conventional fuse melts, which are easy to manufacture and are easy to melt to break the circuit when the current exceeds the limit value. When the melt is used as a tubular body, it is easy to manufacture. In the case of satisfying the same flow capacity, the volume of the tubular melt is smaller than that of the filamentous or sheet-shaped melt, so that the volume of the fuse is further reduced. It is small, and the tubular melt is not easily deformed in the axial direction, and has high tensile strength and strength. In addition, the tubular melt has low contact resistance and low calorific value.

In a possible embodiment, when the melt is a sheet body or a tubular body, at least one row of through holes is provided on the melt, and any row of through holes in the at least one row of through holes is distributed along the lateral direction of the melt. A fuse bridge is formed between two adjacent through holes in the row of through holes. In this way, when the line is overloaded or short-circuited, the fuse bridge can be quickly blown, and the reliability of the fuse can be improved.

In a possible embodiment, the melt is provided with a low temperature alloy, the low temperature alloy is distributed along the lateral direction of the melt, the low temperature alloy divides the melt into a first melt and a second melt, and the low temperature alloy connects the first melt And the second melt, the melting temperature of the low temperature alloy is lower than the melting temperature of the melt. In this way, when the low-time overload current flows for a long time, the low-temperature alloy can reduce the temperature and time for the melt to trigger the arc, and prevent the overall temperature of the fuse from being too high to cause damage.

In a possible embodiment, in order to improve the versatility of the fuse installation, the first connection terminal and the second connection terminal are connected to external devices by welding and/or fasteners.

In a possible embodiment, the arc extinguishing medium may include at least one of quartz sand, metal particles, and ceramic particles. In this way, the arc extinguishing medium can be selected from multiple materials and combined with multiple materials.

An embodiment of the present application provides an electronic device, comprising: a printed circuit board and the fuse shown above, the fuse is connected to the printed circuit board through a first connection terminal and a second connection terminal of the fuse. Among them, by changing the melt in the fuse from the linear shape in the related art to the non-linear shape, the volume of the fuse can be reduced, the material cost can be reduced, and the space utilization rate of downstream products (such as electronic devices, power modules, etc.) can be improved. , to bring greater benefits to the product. Under the condition that the fuse provided by the present application meets the safety regulations, the higher the external heat dissipation efficiency, the larger the compressible volume of the fuse.

In a possible implementation manner, there are multiple fuses, and several of the multiple fuses are stacked on the printed circuit board, which is beneficial to reduce board space and improve space utilization.

An embodiment of the present application further provides a power module, comprising: a heat dissipation device and the electronic device according to claim 11 or 12, wherein the heat dissipation device is used to dissipate heat from the electronic device. The heat sink can quickly dissipate heat from electronic devices or fuses. In addition, by changing the melt of the fuse in the electronic device from the linear shape in the related art to the non-linear shape, the volume of the fuse can be reduced, the material cost can be reduced, and the quality of downstream products (such as electronic devices, power modules, etc.) can be improved. Space utilization, bringing greater benefits to the product. Under the condition that the fuse provided by the present application meets the safety regulations, the higher the external heat dissipation efficiency, the larger the compressible volume of the fuse.

Description of drawings

1 is a schematic structural diagram of a fuse in the related art;

FIG. 2 is a schematic structural diagram of a fuse provided by an embodiment of the application;

3 is a schematic cross-sectional structure diagram of a fuse provided by an embodiment of the application;

4 is a schematic cross-sectional structure diagram of a fuse provided by an embodiment of the application;

5 is a schematic diagram of an exploded structure of a heat pipe provided by an embodiment of the present application;

6 is a schematic structural diagram of a heat transfer pipe body according to an embodiment of the present application;

7 is a schematic cross-sectional structure diagram of a fuse provided by an embodiment of the application;

8 is a schematic cross-sectional structure diagram of a fuse provided by an embodiment of the application;

9 is a schematic structural diagram of the melt tiling provided by an embodiment of the application;

FIG. 10 is a schematic structural diagram of an electronic device provided by an embodiment of the application;

11 is a schematic structural diagram of an electronic device provided by an embodiment of the application;

FIG. 12 is a schematic structural diagram of a power module according to an embodiment of the present application.

Description of reference numbers:

10-fuse; 11-melt; 12-case;

13-Support;

100-fuse;

110-melt; 111-through hole; 112-fuse bridge;

120-heat-conducting pipe; 121-accommodating cavity; 122-heat-conducting pipe body;

1221 - opening; 123 - closure;

130 - the first terminal;

140 - the second terminal;

150-low temperature alloy;

160-installation part; 161-installation hole;

200-electronic devices; 210-printed circuit boards;

300-thermal parts;

400 - power module; 410 - heat sink.

Detailed ways

The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The following will describe the embodiments of the embodiments of the present application in detail with reference to the accompanying drawings.

The fuse is almost one of the necessary safety devices for every switching power supply module. It uses a metal conductor as a melt in series in the circuit. When an overload or short-circuit current passes through the melt, it will fuse due to its own heating, thereby breaking the circuit. An electrical appliance that can fully protect the main power circuit and personal safety. The fuse has a simple structure and is easy to use, and is widely used as a protection device in power systems, various electrical equipment and household appliances.

1 is a schematic structural diagram of a fuse 10 in the related art. Referring to FIG. 1 , the fuse 10 in the related art mainly includes: a melt 11 , a housing 12 and two supports 13 . The melt 11 is assembled in the housing 12 , The two supports 13 are respectively disposed at both ends of the casing 12, and the two ends of the melt 11 located in the casing 12 are respectively electrically connected to the two supports 13 to form a current path, and the two supports 13 are used to support the entire fuse 10 and connect to external devices to form a current path. It should be noted that, in Fig. 1, the diagrams of each part are only a simple schematic diagram. For example, in Fig. 1, the melt 11 is four broken parts. In fact, these four parts are a complete whole, which can make the current flow from One end of the melt 11 leads to the other end of the melt 11 .

However, the fuse 10 in the related art is limited by the requirement of heat dissipation capacity, and the melt 11 is in a linear and tiled shape (as shown in FIG. 1 ). Such fuse 10 is suitable for natural cooling or air-cooled heat dissipation. Furthermore, when the voltage or current parameter is larger, the size of the melt 11 is also designed to be larger, and accordingly, the volume of the fuse 10 is also larger. If the volume of the fuse 10 is too large, the material cost will be too high, and the space utilization rate of the downstream products will be reduced. With the continuous improvement of the power level of power modules in the industry, a small-sized fuse is urgently needed to bring greater benefits to the product.

In order to solve the above problems, the present application provides a fuse, an electronic device and a power module, wherein the fuse includes a melt, a heat pipe, a first connection terminal and a second connection terminal. Change from a linear tiled shape to a non-linear shape, so as to achieve the effect of reducing the volume of the fuse, reduce material costs, improve the space utilization of downstream products, and bring greater benefits to products.

The fuses, electronic devices, and power modules provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

An embodiment of the present application provides a fuse, which is suitable for a working condition with a strong heat dissipation method outside, for example, a working condition where the outside is a liquid nitrogen refrigeration environment, and there is a liquid cooling device outside. Of course, when the fuse provided in this application is placed in natural cooling or air-cooled heat dissipation conditions and also meets the safety regulations, the fuse provided in this application is also suitable for natural cooling and air-cooled heat dissipation conditions.

FIG. 2 is a schematic structural diagram of a fuse 100 provided by an embodiment of the present application. Referring to FIG. 2 , the fuse 100 provided by an embodiment of the present application includes: a melt 110 , a heat pipe 120 , a first terminal 130 and a second Terminal 140.

Specifically, the first connection terminal 130 and the second connection terminal 140 are respectively disposed at both ends of the heat pipe 120 to cover both ends of the heat pipe 120. It should be mentioned here that the first connection terminal 130 and the second connection The terminal 140 may include a plurality of sub-components. For example, if both ends of the heat pipe 120 are covered with contact caps, and then terminals are arranged on the contact caps, the contact caps are also regarded as the first contact terminal and the second contact part of the terminal. The heat pipe 120 , the first connection terminal 130 and the second connection terminal 140 are enclosed to form a accommodating cavity 121 , the melt 110 is arranged in the accommodating cavity 121 , and two ends of the melt 110 are respectively connected to the first connection terminal 130 and the second connection terminal 121 . The two connection terminals 140 are electrically connected, and "electrical connection" here means that a current path can be formed between the first connection terminal 130 , the melt 110 and the second connection terminal 140 when a current is supplied. It should be explained that, the same as FIG. 1 , the illustration of each part in FIG. 2 is only a simple schematic diagram. For example, the melt 110 in FIG. 2 is broken into multiple parts. In fact, the melt 110 of these multiple parts is one The complete unit enables current to pass from one end of the melt 110 to the other end of the melt 110 .

Wherein, the melt 110 extends non-linearly from the first terminal 130 to the second terminal 140. It can be understood that when the melt 110 is observed through the heat pipe 120 from the side in FIG. The connection terminal 130 to the second connection terminal 140 is not in a straight line, and the side surface is the side where the extension change of the melt 110 can be observed.

Among them, "non-linear extension" includes: bending, bending and other special-shaped changes. Exemplarily, FIG. 3 is a schematic cross-sectional structure diagram of the fuse 100 provided by an embodiment of the application, and FIG. 4 is a cross-sectional structure schematic diagram of the fuse 100 provided by an embodiment of the application. Referring to FIG. The first connection terminal 130 to the second connection terminal 140 are bent to form a horizontal "bow" shape. For another example, referring to FIG. 4 , the melt 110 is formed into an “Ω” shape by bending from the first connection terminal 130 to the second connection terminal 140 . Of course, the melt 110 can also be changed from the first terminal 130 to the second terminal 140 by bending to form a series of special-shaped changes, such as arc shape, which will not be listed one by one here. It can be understood that, in a fuse 100, the melt 110 can be bent or bent to form multiple “bow” shapes, multiple “Ω” shapes or multiple arc shapes, etc., of course, it can also have multiple shapes For example, in one fuse 100, the melt 110 includes both a "bow" shape and an "Ω" shape by bending or bending from the first terminal 130 to the second terminal 140.

It should be noted that FIGS. 2 to 4 are not drawn according to the actual scale of each part, and the same is true for other drawings, so the present application should not be limited to the scale and size shown in the drawings. In addition, in this application, "connected" or "electrically connected" may not only mean that the two are directly connected, but also may mean that the two are connected through one or more intermediate devices. In this application, "installation" can include any existing installation method, for example, one part can be fixed on top of another part by means of connectors (such as bolts, rivets, etc.) and/or adhesives, or among. These understandings all fall within the scope of the embodiments of the present application.

It should be understood that the fuse 100 provided by the embodiment of the present application can reduce the volume of the fuse 100, reduce the material cost, and improve the downstream products ( For example, the space utilization of the electronic device 200, the power module 400, etc.) brings greater benefits to the product. Under the condition that the fuse 100 provided by the present application meets the safety regulations, the higher the external heat dissipation efficiency is, the larger the compressible volume of the fuse 100 is.

Of course, this application does not stop there. The fuse 100 provided in the above application needs to conduct away the high temperature generated by the melt 110, and is generally suitable for external working conditions with a strong heat dissipation function, such as a liquid nitrogen refrigeration environment. The practicability of the fuse 100 makes the fuse 100 suitable for more working conditions. In some embodiments of the present application, the fuse 100 may further include: an arc-extinguishing medium (not shown in the figure), and the arc-extinguishing medium is filled in the In the accommodating cavity 121 , and the arc-extinguishing medium covers the melt 110 , it can be understood that the arc-extinguishing medium is filled between the melt 110 and the inner pipe wall of the heat transfer pipe 120 . The arc-extinguishing medium can enhance the arc-extinguishing capability and dissipate heat to the melt 110, so that the fuse 100 can be suitable for general heat dissipation conditions, such as a liquid cooling environment and a large cold plate environment.

Wherein, the arc extinguishing medium may include at least one of quartz sand, metal particles and ceramic particles, that is, the arc extinguishing medium may include quartz sand or metal particles or ceramic particles alone, or may be a combination of multiple materials. The arc extinguishing medium has high thermal conductivity and insulating properties, and has a large contact surface with the arc. After the melt 110 is melted, the arc extinguishing medium can absorb the arc energy, so that the arc cools quickly without damaging the heat pipe 120 . The heat generated by the melt 110 is transferred to the outside of the fuse 100 through the arc extinguishing medium and the heat conducting pipe 120 , so as to realize the heat dissipation of the fuse 100 .

When the fuse 100 provided by the embodiment of the present application needs to be filled with an arc extinguishing medium, since the melt 110 is non-linear from the first terminal 130 to the second terminal 140, if the fuse 110 is in a non-linear shape from the two ends of the heat pipe 120 to the accommodating cavity Filling the arc-extinguishing medium in 121 will not ensure that the surrounding of the melt 110 is fully wrapped and sealed by the arc-extinguishing medium, which may lead to the problem of uneven heat dissipation of the fuse 100. This is also the related art, the melt 110 in the fuse 100 cannot be The reason for performing special-shaped operations such as bending and bending.

In order to solve the above problems, FIG. 5 is a schematic diagram of an exploded structure of a heat pipe 120 provided by an embodiment of the present application. Referring to FIG. 5 , in some embodiments of the present application, the heat pipe 120 may include: a heat pipe body 122 and a closed The sealing member 123 has an opening 1221 on the peripheral side of the heat pipe main body 122. The sealing member 123 is used to close the opening 1221. The opening 1221 is used to fill the accommodating cavity 121 with the arc extinguishing medium, and the melt 110 can also pass through the opening. 1221, there is no need to insert from both ends of the heat pipe 120, which facilitates the installation of the melt 110.

The specific operation method is to first lay part of the arc-extinguishing medium into the accommodating cavity 121, then lay the deformed melt 110, and then fill the remaining arc-extinguishing medium, so that the arc-extinguishing medium fills the entire accommodating cavity 121, and waits to be extinguished. After both the arc medium and the melt 110 are laid, the closing member 123 closes the opening 1221 , and the first terminal 130 and the second terminal 140 are installed on both ends of the heat pipe 120 to close the accommodating cavity 121 . In this way, the melt 110 in the accommodating cavity 121 can be fully wrapped by the arc extinguishing medium, thereby solving the problem of uneven heat dissipation of the fuse 100 .

The main body 122 of the heat transfer pipe can be made of materials with high heat dissipation efficiency and strong heat dissipation stability, such as ceramics, and the sealing member 123 can be made of heat conductive materials, such as ceramics, cement, or metals. Since the closure member 123 and the heat pipe main body 122 are two separate parts, the closure member 123 can be made of a material with the best thermal conductivity under the condition of satisfying the safety regulations, so as to further improve the heat dissipation performance of the fuse 100 .

It should be mentioned that the shape of the heat pipe 120 in the fuse 100 provided in the embodiment of the present application is not limited to the rectangular body shown in FIGS. For example, referring to FIG. 6, FIG. 6 is a schematic structural diagram of a heat pipe body 122 provided by an embodiment of the application. The heat pipe body 122 is a cylinder as a whole, and an opening 1221 is opened on the peripheral side of the cylinder to facilitate melting. The installation of the body 110 and the filling of the arc extinguishing medium. In this application, the heat pipe 120 is a rectangular body as an example for description, wherein the position and size of the opening 1221 on the heat pipe body 122 can be opened according to actual needs. For example, in FIG. The top surface or the bottom surface with a larger area can also be opened on the side surface with a relatively small area.

FIG. 7 is a schematic cross-sectional structure diagram of the fuse 100 according to an embodiment of the present application. Referring to FIG. 7 , in order to enhance heat dissipation and improve heat dissipation efficiency, in some embodiments of the present application, the melt 110 may be close to the heat transfer pipe 120 . Circumferential arrangement, here "the melt 110 is arranged close to the circumferential side of the heat transfer pipe 120" means that the position of the melt 110 in the accommodating cavity 121 is not at the center position, and the melt 110 can be arranged at a certain position close to the heat transfer pipe 120 as required. The position of one side, for example, in FIG. 7 , the melt 110 as a whole is disposed close to the top surface of the heat transfer pipe 120 , so that the high temperature generated by the melt 110 can be concentrated and led out through the top surface. Of course, the melt 110 can also be placed close to the bottom surface or both sides of the heat pipe 120 in FIG. 7 . Generally, the location of the melt 110 in the heat pipe 120 is based on the configuration of the heat sink 410 (see FIG. 12 ) outside the fuse 100 . The arrangement position is determined, for example, when the heat dissipation device 410 (see FIG. 12 ) is arranged on the top of the fuse 100, the melt 110 can be arranged close to the top surface of the heat pipe 120, and the top surface of the heat pipe 120 can displace the melt The temperature of 110 is concentrated and then radiated quickly through the heat dissipation device 410 .

Continuing to refer to FIG. 2 , in the fuse 100 provided in the embodiment of the present application, after the first terminal 130 and the second terminal 140 seal the two ends of the heat pipe 120 , they can be connected to external devices by means of wiring or the like. . As shown in FIG. 3 , FIG. 4 and FIG. 7 , the first terminal 130 and the second terminal 140 seal the two ends of the heat pipe 120 and then continue to extend to form legs that exceed the sides of the heat pipe 120 . It is connected to external devices by means of soldering, for example, it is soldered on the printed circuit board 210 by means of foot soldering. A mounting portion 160 can also be provided on the first terminal 130 and the second terminal 140, and mounting holes 161 are opened on the mounting portion 160, which are then connected to external devices through fasteners (as shown in FIG. 8, which is the present application A schematic cross-sectional structure diagram of the fuse 100 provided in an embodiment).

When the melt 110 is specifically provided, the melt 110 may be a filament, a sheet, or a tubular body formed by rolling the sheet. The filament and sheet are in the shape of the melt 110 of the conventional fuse 100 , which are easy to manufacture, and are easy to melt to break the circuit when the current exceeds the limit value. When the melt 110 is fabricated as a tubular body, it is easy to fabricate, and under the condition of satisfying the same flow capacity, the volume of the tubular melt 110 is smaller than that of the filament-shaped or sheet-shaped melt 110 , so that the fuse 100 has a smaller volume. The volume of the tubular melt 110 is further reduced, and the tubular melt 110 is not easily deformed in the axial direction, and has high tensile strength. In addition, the tubular melt 110 has low contact resistance and low heat generation. The transverse section of the tubular melt 110 may be circular, triangular, square, or the like. When the material of the melt 110 is selected, the melt 110 can be made of zinc, silver, copper, aluminum, lead-tin alloy, copper-silver alloy and other materials. These materials can be blown when reaching a predetermined temperature to realize the fuse function of the fuse 100 .

When the melt 110 is a sheet-shaped body or a tubular body, such as shown in FIG. 9 , which is a schematic structural diagram of the melt 110 provided by an embodiment of the application when it is tiled, at least one row of through holes can be provided on the melt 110 Holes 111, any row of through holes 111 are distributed along the lateral direction of the melt 110, here "lateral distribution" means that the same row of through holes 111 is opened from one side of the melt 110 along the axial direction of the fuse 100 to the direction along the fuse 100. On the other side of the axial direction of 100, a fuse bridge 112 is formed between two adjacent through holes 111 in the same row of through holes 111, which is also indicated by the circle marks in FIG. 3, FIG. 4, FIG. 7, and FIG. 8 where the fuse bridge 112 is located. When the line is overloaded or a short-circuit fault occurs, the fuse bridge 112 can be quickly blown to improve the reliability of the fuse.

Continuing to refer to FIG. 9 , in some embodiments of the present application, low-temperature alloys 150 may also be provided on the melt 110 , and the low-temperature alloys 150 are distributed along the lateral direction of the melt 110 . Here, the “lateral distribution” is in the same row as above. The “lateral distribution” in the lateral distribution of the holes 111 is the same, the low temperature alloy 150 divides the melt 110 into two parts, the first melt 110 and the second melt 110, and connects the two parts of the melt 110, and the melting of the low temperature alloy 150 The temperature is below the melting temperature of melt 110 . In this way, when the low overload current flows for a long time, the temperature and time for the melt 110 to trigger the arc can be reduced, so as to prevent the fuse 100 from being damaged due to excessive temperature as a whole.

To sum up, the fuse 100 provided by the embodiments of the present application has the following advantages:

1. Under the condition of strong heat dissipation, the volume of the fuse 100 can be reduced, thereby reducing the manufacturing cost of the fuse 100. On the premise of meeting the safety regulations, the higher the external heat dissipation efficiency, the larger the compressible volume of the fuse 100. . The volume of the fuse 100 is expected to be reduced by more than 40%, and the manufacturing cost is expected to be reduced by more than 20%.

2. An opening 1221 is provided in the main body 122 of the heat pipe in the fuse 100 , and the melt 110 in the accommodating cavity 121 can be deformed in a special shape to increase the plasticity of the melt 110 . After the melt 110 in the accommodating cavity 121 is transformed into a special shape, the arc extinguishing medium can completely wrap the melt 110, thereby solving the problem of uneven heat dissipation of the fuse 100 .

3. After the opening 1221 is provided in the heat pipe body 122 of the fuse 100, the melt 110 can be adjusted to the side of the external heat sink 410 in the accommodating cavity 121 by adjusting the melt 110 and the arc extinguishing medium, so as to realize rapid heat dissipation .

4. The heat pipe 120 in the fuse 100 is provided with an opening 1221, and the arc extinguishing medium in the accommodating cavity 121 can be selected from multiple materials and combined with multiple materials as required.

5. The sealing member 123 used to close the opening 1221 of the main body 122 of the heat-conducting pipe can be selected from the material with the best thermal conductivity under the premise of satisfying the safety regulations.

6. After the fuse 100 is reduced, the layout space of downstream products can be reduced. For example, when the fuse 100 is installed on the printed circuit board 210, the space occupied by the printed circuit board 210 can be reduced, which is more beneficial to the printed circuit Layout of other devices on board 210.

FIG. 10 is a schematic structural diagram of an electronic device 200 provided by an embodiment of the present application. Referring to FIG. 10 , an embodiment of the present application further provides an electronic device 200 including a printed circuit board 210 and at least one fuse as shown above 100. The fuse 100 is connected to the printed circuit board 210 through the first terminal 130 and the second terminal 140, for example, the first terminal 130 and the second terminal 140 are soldered on the printed circuit board 210, and the fuse 100 and A heat-conducting member 300 is disposed between the printed circuit boards 210 to facilitate heat transfer.

The technical features of the fuse 100 , the technical effects brought about by the technical features, and the technical problems solved by the technical features are the same as those of the fuse 100 shown above, and will not be repeated here.

FIG. 11 is a schematic structural diagram of an electronic device 200 according to an embodiment of the present application. Referring to FIG. 11 , in some embodiments of the present application, the electronic device 200 may include multiple fuses 100 . Several fuses 100 are stacked on the printed circuit board 210 , which is beneficial to reduce board space and improve space utilization. In the drawings of the present application, two fuses 100 are briefly described. A heat conducting member 300 may be disposed between every two fuses 100 and between the fuse 100 and the printed circuit board 210 to facilitate heat transfer.

FIG. 12 is a schematic structural diagram of a power module 400 provided by an embodiment of the present application. Referring to FIG. 12 , an embodiment of the present application further provides a power module 400 including a heat dissipation device 410 and the electronic device 200 shown above. The device 410 is used to dissipate heat to the electronic device 200 . Exemplarily, as shown in FIG. 12 , the heat dissipation device 410 may be arranged on the top of the electronic device 200 , that is, the top of the fuse 100 in the electronic device 200 , and the fuse 100 is blown The body 110 may be disposed close to the heat dissipation device 410 , which facilitates rapid heat dissipation of the fuse 100 .

The technical features of the fuse 100 in the power module 400 , the technical effects brought about by the technical features, and the technical problems solved by the technical features are the same as the above, and will not be repeated here.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed in the present application can easily think of changes or replacements. Covered within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a The indirect connection through an intermediate medium may be the internal communication of the two elements or the interaction relationship between the two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

The devices or elements referred to in the embodiments of the present application or implied must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present application. In the description of the embodiments of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, while It is not necessary to describe a particular order or sequence. It is to be understood that data so used may be interchanged under appropriate circumstances such that embodiments of the embodiments of the application described herein can be implemented, for example, in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, but not to limit them; It should be understood that: it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the embodiments of the present application The scope of the technical solutions of each embodiment.

Claims (13)

1. A fuse, comprising: the device comprises a melt, a heat conduction pipe, a first wiring terminal and a second wiring terminal;

the first wiring terminal and the second wiring terminal are respectively arranged at two ends of the heat conduction pipe, the first wiring terminal and the second wiring terminal enclose to form an accommodating cavity, the melt is located in the accommodating cavity, and two ends of the melt are respectively electrically connected with the first wiring terminal and the second wiring terminal;

the melt extends nonlinearly from the first connecting terminal to the second connecting terminal.

2. The fuse of claim 1, further comprising: an arc-extinguishing medium;

the arc extinguishing medium is filled in the accommodating cavity and coats the melt.

3. A fuse as recited in claim 2, wherein said thermally conductive tube comprises: a heat pipe body and a closure;

the periphery side of the heat conduction pipe main body is provided with an opening, and the closing piece closes the opening;

the opening is used for filling the arc extinguishing medium in the accommodating cavity.

4. A fuse as per claim 3, characterised in that said closure is of heat conducting material.

5. A fuse as per any of claims 1-4, characterised in that the melt is arranged close to the peripheral side of the heat-conducting tube.

6. A fuse as per any of claims 1-4, characterised in that the melt is a filament, a sheet or a tubular body formed by rolling a sheet.

7. The fuse protector as claimed in claim 6, wherein when the fuse body is a sheet-like body or a tubular body, at least one row of through holes is formed on the fuse body, any one row of the through holes in the at least one row of through holes is distributed along a transverse direction of the fuse body, and a fuse bridge is formed between two adjacent through holes in the same row of through holes.

8. A fuse as per any of claims 1-4, characterized in that a low temperature alloy is arranged on the melt, said low temperature alloy being distributed in the transverse direction of the melt, said low temperature alloy dividing the melt into a first melt and a second melt, said low temperature alloy connecting the first and second melts;

the low temperature alloy has a melting temperature lower than a melting temperature of the melt.

9. A fuse as per any of claims 1-4, characterised in that the first and second terminals are connected to external devices by welding and/or fasteners.

10. The fuse of any of claims 2-4, wherein the arc quenching medium includes at least one of quartz sand, metal particles, and ceramic particles.

11. An electronic device, comprising: a printed circuit board and at least one fuse according to any one of claims 1 to 10;

the fuse is connected with the printed circuit board through a first connection terminal and a second connection terminal of the fuse.

12. The electronic device of claim 11, wherein said fuse is a plurality, and wherein a number of said plurality of said fuses are stacked on said printed circuit board.

13. A power module, comprising: a heat sink and an electronic device as claimed in claim 11 or 12;

the heat dissipation device is used for dissipating heat of the electronic device.

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