Fuse comprising light wiring terminal and electric automobile with fuse

Abstract

The utility model relates to a fuse comprising a light wiring terminal and an electric automobile with the fuse, and the fuse comprises at least one fuse body which is made of a first conductive metal; the pair of wiring terminals are arranged on the two sides of the at least one fuse body in the length direction of the at least one fuse body respectively, each wiring terminal is made of second conductive metal, at least one connecting groove is formed in the surface, close to the at least one fuse body, of each wiring terminal, and the melting point and the density of the second conductive metal are lower than those of the first conductive metal; the at least one pair of connecting sheets are respectively placed in the connecting grooves of the pair of wiring terminals, are far away from the corresponding connecting grooves and extend to exceed the groove openings of the corresponding connecting grooves, each connecting sheet is made of first conductive metal, and the surface, facing the groove bottom of the corresponding connecting groove, of each connecting sheet is combined with second conductive metal which is fused and solidified; the surface, back to the groove bottom of the corresponding connecting groove, of each connecting piece is connected to the corresponding length direction side of at least one melt.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit protection devices for electric power or electric vehicles, in particular to a fuse comprising a light-duty wiring terminal and an electric vehicle with the fuse. Background Art

[0002] As the global energy crisis intensifies and environmental pollution becomes increasingly serious, electric vehicles have developed rapidly due to their advantages of zero emissions, high efficiency and low noise. Electric vehicles use power batteries to provide electricity, and then use the electronic control system to distribute the electricity to various electrical devices to drive the vehicle. In order to protect the safe operation of electric vehicles, fuses must be installed in the vehicle circuit to protect the entire vehicle from short circuits or overloads.

[0003] However, the fuse element and the terminal block of the prior art fuse are usually made of the same material, such as copper, and welded together, which results in the problem of high cost and heavy weight of the fuse, thus making it difficult to apply the fuse to electric vehicles. However, if the fuse element and the terminal block are made of different materials, there is a risk of unreliable connection during welding due to the different melting points of the different materials.

[0004] Therefore, there is a need in the art for a fuse that is low in cost, light in weight, safe and reliable. Utility Model Content

[0005] The utility model aims to provide a fuse including a light-weight wiring terminal which can at least solve part of the above problems.

[0006] The utility model also aims to provide an electric vehicle using the improved fuse.

[0007] According to one aspect of the utility model, a fuse including a light-duty terminal is provided, the fuse including: at least one melt, which is constructed as a thin sheet structure made of a first conductive metal; a pair of terminals, which are respectively arranged on both sides of the at least one melt in the length direction of the at least one melt, each of which is made of a second conductive metal and is provided with at least one connecting groove on the surface adjacent to the at least one melt, wherein the melting point and density of the second conductive metal are lower than those of the first conductive metal; at least one pair of connecting pieces, which are respectively placed in the connecting grooves of the pair of connecting pieces and extend away from the corresponding connecting grooves in the length direction of the at least one melt to a notch beyond the corresponding connecting groove, each connecting piece is made of the first conductive metal and is constructed to be able to transfer external heat to the groove bottom of the corresponding connecting groove to melt the corresponding second conductive metal, so that the surface of each connecting piece facing the groove bottom of the corresponding connecting groove can be combined with the second conductive metal solidified after melting under external pressure, and the surface of each connecting piece facing away from the groove bottom of the corresponding connecting groove can be connected to the corresponding length direction side of the at least one melt.

[0008] Compared with the prior art, the fuse provided by the utility model arranges a connecting groove on the connecting terminal, and arranges a connecting piece with a thickness greater than the depth of the connecting groove in the connecting groove, thereby converting the connection between the connecting terminal and the fuse into a connection between the connecting terminal and the connecting piece and a connection between the connecting piece and the fuse. Therefore, when the connecting terminal is made of a material with a lower melting point and density than the connecting piece and the fuse, on the one hand, the overall weight of the fuse can be reduced, so that it can be suitable for electric vehicles with strict requirements. On the other hand, it can allow the connecting piece to achieve an integral connection between the surface of the connecting piece facing the bottom of the connecting groove and the bottom of the connecting groove under high temperature and high pressure, and the connection between the connecting piece and the fuse can be achieved using conventional connection methods.

[0009] Preferably, the at least one pair of connecting pieces are respectively arranged in the connecting grooves of the pair of connecting terminals at intervals relative to the groove walls of the corresponding connecting grooves.

[0010] Preferably, the at least one sheet of melt is configured as a plurality of sheets of melt, and the plurality of sheets of melt are arranged in a plurality of rows that are evenly spaced apart.

[0011] Preferably, at least one connecting groove on each terminal block is constructed as a plurality of connecting grooves having the same number as the number of rows of the multi-piece fuse, and the at least one pair of connecting plates is constructed as a plurality of pairs of connecting plates having the same number as the number of rows of the multi-piece fuse, so that the plurality of connecting grooves on each terminal block and the connecting plates located in the corresponding connecting grooves are arranged in a multi-row pattern evenly spaced apart.

[0012] Preferably, each sheet of melt comprises, in the length direction, a main body section and connecting sections respectively located on both sides of the main body section and bent perpendicularly relative to the main body section.

[0013] Preferably, at least one connecting groove on each connecting terminal is constructed as one connecting groove and the shape of the one connecting groove on a plane perpendicular to the length direction of the multi-piece fuse is the same as the shape of the corresponding connecting terminal, and the at least one pair of connecting plates is constructed as a pair of connecting plates, and the shape of each connecting plate on a plane perpendicular to the length direction of the multi-piece fuse is the same as the shape of the one connecting groove.

[0014] Preferably, a plurality of rows of indicating grooves are provided on the surface of each connecting piece facing away from the groove bottom of the corresponding connecting groove.

[0015] Preferably, the first conductive metal material is copper, and the second conductive metal material is magnesium-aluminum alloy.

[0016] Preferably, each connecting piece is cut from 0.5 mm thick copper material.

[0017] According to another aspect of the utility model, an electric vehicle is provided, comprising the aforementioned fuse including the light-duty terminal.

[0018] Some of the other features and advantages of the present invention will be apparent to those skilled in the art after reading this application, and the other parts will be described in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 is a first exploded schematic diagram of a fuse according to a first embodiment of the utility model;

[0021] Figure 2 is a second exploded schematic diagram of the fuse according to the first embodiment of the utility model;

[0022] Figure 3 is a third exploded schematic diagram of the fuse according to the first embodiment of the utility model;

[0023] Figure 4 This is a first exploded schematic diagram of a fuse according to a second embodiment of the present utility model;

[0024] Figure 5 1 is a second exploded schematic diagram of a fuse according to a second embodiment of the present utility model.

[0025] Description of reference numerals:

[0026] 100-fuse; 10-melt element; 11-main body section; 12-connecting section; 20-connecting terminal; 21-connecting groove; 22-first through hole; 30-connecting piece; 31-second through hole; 40-melting tube; 50-sand filling hole. DETAILED DESCRIPTION

[0027] Now, with reference to the accompanying drawings, a schematic scheme of a fuse including a light-duty terminal block disclosed in the utility model is described in detail. Although the accompanying drawings are provided to present some embodiments of the utility model, the accompanying drawings do not have to be drawn according to the dimensions of the specific embodiments, and certain features may be enlarged, removed or partially cut to better illustrate and explain the disclosure of the utility model. Some components in the accompanying drawings may be adjusted in position according to actual needs without affecting the technical effect. The phrase "in the accompanying drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0028] Certain directional terms used to describe the drawings below, such as "inside", "outside", "above", "below" and other directional terms, will be understood to have their normal meanings and refer to those directions involved when the drawings are normally viewed. Unless otherwise specified, the directional terms described in this specification are basically in accordance with the conventional directions understood by those skilled in the art.

[0029] The terms "first", "first", "second", "second" and the like used in the present invention do not indicate any order, quantity or importance, but are used to distinguish one component from other components.

[0030] The terms "joining", "connection" and the like as used in the present invention include both that two components are indirectly connected together by means of an intermediate layer such as an adhesive, a welding agent, etc. or an intermediate piece such as a connector, a transition piece, etc., and that two components are directly connected together without the aid of any intermediate layer such as an adhesive, a welding agent, etc. or an intermediate piece such as a connector, a transition piece, etc.

[0031] Figures 1 to 5 The fuse 100 of the utility model including the light-weight terminal 20 is shown by way of example. The fuse 100 in this example has an ingenious structural design, which converts the heterogeneous metal connection between the fuse 10 and the terminal 20 made of different metal materials into the same metal connection, thereby reducing the weight and cost of the fuse 100 while also ensuring the connection reliability between the fuse 10 and the terminal 20 of the fuse 100. As shown in the figure, the fuse 100 may include at least one fuse 10, a pair of terminal 20 and at least one pair of connecting pieces 30.

[0032] Specifically, the melt 10 may be a thin sheet structure made of a first conductive metal having excellent electrical conductivity and thermal conductivity, so that electrical energy and thermal energy can be transferred through the melt 10. A pair of connecting terminals 20 are respectively arranged on both sides of the melt 10 in the length direction of the melt 10, so as to be connected to both sides of the melt 10 by means of at least one pair of connecting pieces 30, so that the melt 10 can be connected in series to the protected circuit of the electric vehicle by means of the connecting terminals 20, thereby protecting the electric vehicle from overload and short circuit.

[0033] The terminal block 20 may be an integral piece made of a second conductive metal, and the second conductive metal has a lower melting point and density than the first conductive metal. On the one hand, this can reduce the weight of the fuse 100. On the other hand, when the connecting piece 30 is made of the same first conductive metal as the fuse 10, this can allow the terminal block 20 to enter a molten state before the connecting piece 30. Exemplarily, the fuse 10 and the connecting piece 30 may both be made of copper, and the terminal block 20 may be made of a magnesium-aluminum alloy, such as aluminum alloy 6061, aluminum alloy 6063, or aluminum alloy 6082. The mechanical properties of the magnesium-aluminum alloy are close to those of copper, but the density is only one-third of that of copper. Therefore, this can reduce the weight and cost of the fuse 100 while ensuring the mechanical properties of the fuse 100.

[0034] A pair of connecting terminals 20 may be arranged at both sides of the length direction of the melt 10, and at least one connecting groove 21 may be recessed on the surface of each connecting terminal 20 adjacent to the melt 10. At least one pair of connecting pieces 30 may be arranged in the connecting grooves 21 on the surface of the pair of connecting terminals 20 adjacent to the melt 10, respectively. Each connecting piece 30 is placed in the corresponding connecting groove 21 and protrudes from the corresponding connecting groove 21 away from the connecting groove 21 to a notch beyond the connecting groove 21. This arrangement is convenient not only for using external tools to operate the connection between the connecting piece 30 and the connecting terminal 20, but also for operating the connection between the connecting piece 30 and the melt 10.

[0035] When assembling the fuse 100, after the connecting piece 30 is placed in the connecting groove 21 of the corresponding terminal 20, the expected high temperature and high pressure are applied to the surface of the connecting piece 30 facing away from the bottom of the connecting groove 21 by means of an external tool, and the connecting piece 30 can transfer the heat and pressure applied thereto to the bottom of the corresponding connecting groove 21, so that the second conductive metal at the bottom of the corresponding connecting groove 21 is melted and the second conductive metal solidified after melting under pressure can be combined with the surface of the connecting piece 30 facing the bottom of the corresponding connecting groove 21. It should be noted that the connecting piece 30 combined with the bottom of the corresponding connecting groove 21 also protrudes relative to the notch of the corresponding connecting groove 21 on the terminal 20, which can further facilitate the operator to connect the connecting piece 30 and the melt 10 made of the same metal material together.

[0036] Preferably, the connecting piece 30 can be cut from 0.5 mm copper material, which is not only convenient for commercial procurement of raw materials, but also the connecting piece 30 with a thickness of 0.5 mm can effectively transfer heat from one side to the other side in the thickness direction while ensuring the desired mechanical properties. It can be understood that the structure of the fuse tube 40 and other structures of the fuse 100 are not the focus of the description of the present utility model, so they are not described here.

[0037] Optionally, as shown in the figure, the shape of the connecting piece 30 in the plane perpendicular to the length direction of the melt 10 can be designed to be the same as the shape of the corresponding connecting groove 21, but the shape in the plane perpendicular to the length direction of the melt 10 can be designed to be slightly smaller than the size of the corresponding connecting groove 21, so that the connecting piece 30 can be arranged at intervals relative to the groove wall of the corresponding connecting groove 21 after being placed in the corresponding connecting groove 21.

[0038] Therefore, when the connecting piece 30 is pushed into the connecting groove 21 of the corresponding terminal 20 under high temperature and high pressure, the molten second conductive metal can be squeezed from the bottom of the connecting groove 21 into the gap between the connecting piece 30 and the connecting groove 21. After the molten second conductive metal cools down, the peripheral side of the connecting piece 30 can also be connected to the groove wall of the connecting groove 21 via the second conductive metal that is cooled after melting, thereby not only improving the connection strength between the connecting piece 30 and the terminal 20, but also the surface of the connecting piece 30 facing the bottom of the connecting groove 21 can maintain as close contact as possible with the bottom of the connecting groove 21 under high pressure, thereby minimizing possible pores or cracks between the two. Importantly, since the connecting piece 30 always protrudes relative to the notch of the connecting groove 21, the molten second conductive metal overflowing from the bottom of the connecting groove 21 can flow at most into the gap between the connecting piece 30 and the connecting groove 21, thereby always keeping the surface of the connecting piece 30 facing away from the bottom of the connecting groove 21, that is, the surface facing the melt 10, flat, which can also improve the connection reliability between the connecting piece 30 and the melt 10.

[0039] In such Figures 1 to 3 The first embodiment shown and Figures 4 to 5 In the second embodiment shown, at least one fuse 10 is designed to be seven pieces. In an embodiment not shown, the number of fuses 10 can be adjusted according to the actual use scenario. In order to connect multiple fuses 10 to the terminal 20, the terminal 20 and the connecting piece 30 of the fuse 100 can be constructed as follows Figures 1 to 3 As shown in the first embodiment shown, or constructed as Figures 4 to 5 The second embodiment is shown.

[0040] exist Figures 1 to 3In the first embodiment shown, seven pieces of melt 10 are connected to the connection terminal 20 in a pattern of five rows evenly spaced apart, so as to make full use of the space on the surface of the connection terminal 20 facing the melt 10. Five connection grooves 21, the same number as the number of rows of the multiple pieces of melt 10, may be provided on the surface of the connection terminal 20 facing the melt 10, and the connection pieces 30 may also be correspondingly provided as five pairs of connection pieces 30. The multiple connection grooves 21 are arranged in a pattern of multiple rows evenly spaced apart on the connection terminal 20, and the connection pieces 30 placed in the corresponding connection grooves 21 also form a pattern of multiple rows evenly spaced apart on the connection terminal 20.

[0041] It can be understood that the lengths of the first row of connecting grooves 21, the third row of connecting grooves 21 and the fifth row of connecting grooves 21 are close to the width of the connecting section 12 of the melt 10, and the lengths of the second row of connecting grooves 21 and the fourth row of connecting grooves 21 can be designed to be slightly larger than twice the width of the connecting section 12 of the melt 10.

[0042] Among them, the melt 10 may include a main body segment 11 in the length direction and a connecting segment 12 which may be located on both sides of the main body segment 11 and bent vertically relative to the main body segment 11, so that the connecting segment 12 can be attached to the surface of the connecting piece 30 facing the melt 10, thereby facilitating connecting the connecting segment 12 of the melt 10 to the connecting piece 30.

[0043] The shape of the connecting section 12 on a plane perpendicular to the length direction of the fuse 10 can be designed as a rectangle, the connecting piece 30 can be designed as a rectangular copper piece accordingly, and the connecting groove 21 can be designed as a rectangular groove. The length and width of the connecting piece 30 are slightly smaller than the corresponding connecting groove 21 to form a gap between the two. The length and width of the connecting section 12 can be slightly smaller than the length and width of the corresponding connecting piece 31 to ensure the connection area between the connecting section 12 and the connecting piece 31 to avoid affecting the electrical performance of the fuse 100.

[0044] exist Figures 4 to 5 In the second embodiment shown, a connection groove 21 may be provided on the surface of the connection terminal 20 facing the melt 10, and the shape of the connection groove 21 on a plane perpendicular to the length direction of the melt 10 is the same as that of the connection terminal 20, that is, the connection groove 21 is also designed as a circular groove. The connection piece 30 may also be correspondingly designed as a pair of connection pieces 30, and the shape of each connection piece 30 on a plane perpendicular to the length direction of the melt 10 is the same as that of the connection groove 21 and the size is slightly smaller than the size of the connection groove 21, that is, the connection piece 30 may be designed as a circular connection piece 30 with a diameter smaller than that of the connection groove 21.

[0045] The melt 10 may be Figures 1 to 3The first embodiment shown is constructed to include a main body section 11 and a connecting section 12. The surface of the connecting piece 30 facing away from the groove bottom of the connecting groove 21, that is, the surface facing the melt 10, can be provided with multiple rows of indicating grooves, and the junction of the connecting section 12 of the melt 10 and the main body section 11 can be aligned with the indicating grooves on the connecting piece 30, so that multiple pieces of melt 10 are connected to the surface of the connecting piece 30 facing the melt 10 in a multi-row pattern.

[0046] Optionally, the connecting terminal 20 may be provided with a sand filling hole 50 penetrating along the length direction of the melt 10. Figures 1 to 3 In the first embodiment shown, the connection grooves 21 arranged in multiple rows on the connection terminal 20 prevent the formation of the sand filling holes 50. Figures 4 to 5 In the second embodiment shown, the connecting terminal 20 may be provided with a first through hole 22 extending through the length direction of the melt 10, and the connecting piece 30 may be provided with a second through hole 31 extending through the length direction of the melt 10, so that when the connecting piece 30 is installed to the connecting groove 21 of the connecting terminal 20, the first through hole 22 is aligned with the second through hole 31 to connect and form a sand filling hole 50.

[0047] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0048] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by any technician in the field without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A fuse (100) comprising a lightweight terminal (20), characterized in that: The fuse (100) comprises: at least one melt (10) configured as a thin sheet structure made of a first conductive metal; A pair of connecting terminals (20) are respectively arranged on both sides of the at least one melt (10) in the length direction of the at least one melt (10), each connecting terminal (20) is made of a second conductive metal and is provided with at least one connecting groove (21) on a surface adjacent to the at least one melt (10), wherein the melting point and density of the second conductive metal are lower than those of the first conductive metal; At least one pair of connecting pieces (30) are respectively placed in the connecting grooves (21) of the pair of connecting terminals (20) and extend away from the corresponding connecting grooves (21) in the length direction of the at least one piece of melt (10) to a notch beyond the corresponding connecting groove (21), each connecting piece (30) is made of the first conductive metal and is configured to transfer external heat to the groove bottom of the corresponding connecting groove (21) to melt the corresponding second conductive metal, so that the surface of each connecting piece (30) facing the groove bottom of the corresponding connecting groove (21) can be combined with the second conductive metal that solidifies after melting under external pressure, and the surface of each connecting piece (30) facing away from the groove bottom of the corresponding connecting groove (21) can be connected to the corresponding length direction side of the at least one piece of melt (10).

2. The fuse (100) comprising a light-duty terminal (20) according to claim 1, characterized in that: The at least one pair of connecting pieces (30) are respectively arranged in the connecting grooves (21) of the pair of connecting terminals (20) with respect to the groove walls of the corresponding connecting grooves (21) at intervals.

3. The fuse (100) comprising a light-duty terminal (20) according to claim 1 or 2, characterized in that: The at least one melt (10) is configured as a plurality of melts (10), and the plurality of melts (10) are arranged in a plurality of rows that are evenly spaced apart.

4. The fuse (100) comprising a light-duty terminal (20) according to claim 3, characterized in that: At least one connection groove (21) on each connection terminal (20) is configured as a plurality of connection grooves (21) having the same number as the number of rows of the multi-piece fuse (10), and the at least one pair of connection pieces (30) is configured as a plurality of pairs of connection pieces (30) having the same number as the number of rows of the multi-piece fuse (10), so that the plurality of connection grooves (21) on each connection terminal (20) and the connection pieces (30) located in the corresponding connection grooves (21) are arranged in a multi-row pattern evenly spaced apart.

5. The fuse (100) comprising a light-duty terminal (20) according to claim 4, characterized in that: Each sheet melt (10) comprises, in the length direction, a main body section (11) and connecting sections (12) which are respectively located on both sides of the main body section (11) and are bent perpendicularly relative to the main body section (11).

6. The fuse (100) comprising a light-duty terminal (20) according to claim 3, characterized in that: At least one connecting groove (21) on each connecting terminal (20) is configured as one connecting groove (21), and the shape of the one connecting groove (21) on a plane perpendicular to the length direction of the multi-piece fuse (10) is the same as the shape of the corresponding connecting terminal (20); the at least one pair of connecting pieces (30) is configured as a pair of connecting pieces (30), and the shape of each connecting piece (30) on a plane perpendicular to the length direction of the multi-piece fuse (10) is the same as the shape of the one connecting groove (21).

7. The fuse (100) comprising a light-weight terminal (20) according to claim 6, characterized in that: A plurality of rows of indicating grooves are arranged on the surface of each connecting piece (30) facing away from the groove bottom of the corresponding connecting groove (21).

8. The fuse (100) comprising a light-duty terminal (20) according to claim 1, characterized in that: The first conductive metal material is copper, and the second conductive metal material is magnesium-aluminum alloy.

9. The fuse (100) comprising a light-weight terminal (20) according to claim 8, characterized in that: Each connecting piece (30) is cut from a copper material with a thickness of 0.5 mm.

10. An electric vehicle, characterized in that: The electric vehicle comprises a fuse (100) comprising a light-duty terminal (20) according to any one of claims 1 to 9.

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