Power distribution system for electric automobile and electric automobile with power distribution system

Abstract

The utility model relates to a power distribution system for an electric automobile and the electric automobile with the power distribution system. The power distribution system comprises a fuse, the fuse comprises a fuse body extending in the axial direction and a pair of connecting terminals extending out of the two axial ends of the fuse body, each connecting terminal comprises an end cover and a contact knife integrally formed with the end cover, the end covers are installed at the corresponding axial ends of the fuse body, and the contact knife is installed on the fuse body. The contact knife comprises a connecting part section which extends for a certain distance from the axial outer side of the end cover along the axial direction far away from the end cover, and a plugging part section which vertically extends from the end part, far away from the end cover, of the connecting part section to exceed the fuse body; and the mounting seat is provided with a jack, a clamping bulge and a limiting bulge, wherein the jack is used for inserting the part, extending out of the fuse body, of the plugging part section, the clamping bulge extends towards the connecting part section until the clamping bulge can be clamped to one side, back to the jack, of the connecting part section, and the limiting bulge extends towards the connecting part section until the limiting bulge can abut against one side, facing the jack, of the connecting part section.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit protection devices for electric power or electric vehicles, and in particular to a power distribution system for electric vehicles and an electric vehicle having the same. Background Art

[0002] The power distribution system, a core component of electric vehicles, distributes the electrical energy from the vehicle's battery to the various electrical components within the vehicle. It typically includes a fuse connected in series with the protected circuit. This fuse heats up and melts when a fault occurs in the protected circuit, thereby protecting the circuit connected in series with the fuse. The power distribution system may also include a mounting base for securing the fuse. However, prior art typically utilizes connection holes on the fuse's contact blades, allowing the fuse to be attached to the mounting base using fasteners. This can complicate installation and, given the limited interior space of an electric vehicle, can be inconvenient for users.

[0003] Therefore, there is a need in the art for a power distribution system for electric vehicles that is easy to install and has wider applicability. Utility Model Content

[0004] The utility model aims to provide a power distribution system for electric vehicles that can at least solve some of the above problems.

[0005] The utility model also aims to provide an electric vehicle using the improved power distribution system.

[0006] According to one aspect of the present invention, a power distribution system for an electric vehicle is provided, the power distribution system comprising: a fuse comprising an axially extending fuse body and a pair of connecting terminals extending from both axial ends of the fuse body, each connecting terminal comprising an end cover and a contact knife integrally formed with the end cover, the end cover being mounted to the corresponding axial end of the fuse body, the contact knife comprising a connecting section extending axially away from the end cover for a certain distance from the axial outer side of the end cover and a plug-in section extending vertically from the end of the connecting section away from the end cover to exceed the fuse body; a mounting seat, provided with a socket for inserting a portion of the plug-in section extending beyond the fuse body, a snap-in protrusion extending toward the connecting section until it can be snapped into a side of the connecting section facing away from the socket, and a limiting protrusion extending toward the connecting section until it can abut against a side of the connecting section facing the socket.

[0007] Compared with the prior art, the electric vehicle of the present invention is installed by plugging together a fuse and a mounting base, which is convenient to operate and can be applied to electric vehicles with smaller internal spaces. Importantly, the connection terminal of the fuse includes an integrally formed end cap and contact blade. This arrangement allows the connection section to extend axially from the end cap with a small contact area without affecting the connection strength between the end cap and the end cap. Therefore, when the vertically extending plug-in section is inserted into the socket of the mounting base, the axially extending connection section enables it to cooperate with the snap-on protrusion and the limiting protrusion on the mounting base, thereby enhancing the connection strength between the fuse and the mounting base by snapping the snap-on protrusion to the side of the connection section facing away from the socket, and limiting the insertion distance of the fuse by abutting the limiting protrusion against the side of the connection section facing away from the socket.

[0008] Preferably, the fuse body includes: a melting tube, which is provided with an installation cavity extending axially and is open at both axial ends, and the end covers of the pair of connecting terminals are respectively installed at both axial ends of the melting tube to close the installation cavity of the melting tube; a fusible component, which extends axially in the installation cavity of the melting tube, and the axial ends of the fusible component are respectively connected to the axial inner side of the corresponding end cover.

[0009] Preferably, the connecting section extends axially from the center of the corresponding end cover away from the corresponding end cover.

[0010] Preferably, the end cover is sleeved on the inner circumferential surface of the corresponding axial end of the melting tube by interference fit.

[0011] Preferably, there is a smooth transition between the connecting section and the plug-in section of the contact blade.

[0012] Preferably, a connecting hole is provided on the connecting section or the plug-in section of the contact blade.

[0013] Preferably, the thickness of the plug section gradually decreases at an end portion away from the connecting section.

[0014] Preferably, a sand filling hole extending axially through the end cover of one of the pair of connecting terminals is provided; the fuse further comprises an arc-extinguishing filler filled into the installation cavity of the melting tube through the sand filling hole and a plug for sealing the sand filling hole.

[0015] According to another aspect of the present invention, an electric vehicle is provided, which includes the aforementioned power distribution system.

[0016] 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 detailed description in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0018] Figure 1 is a top view of a power distribution system for an electric vehicle according to the present utility model;

[0019] Figure 2 This is a three-dimensional view of a fuse of a power distribution system of an electric vehicle according to the present utility model;

[0020] Figure 3 This is an exploded side view of a fuse for a power distribution system of an electric vehicle according to the present utility model;

[0021] Figure 4 is a first side view of a fuse of a power distribution system of an electric vehicle according to the present utility model;

[0022] Figure 5 This is a second side view of the fuse of the power distribution system of the electric vehicle according to the present utility model.

[0023] Explanation of the reference numerals: 100 - power distribution system; 10 - fuse; 11 - fuse body; 111 - fuse tube; 12 - connecting terminal; 121 - end cover; 1211 - sand filling hole; 122 - contact knife; 1221 - connecting section; 1222 - plug-in section; 1223 - connecting hole; 20 - mounting seat; 21 - snap-on protrusion; 22 - limiting protrusion. DETAILED DESCRIPTION

[0024] With reference to the accompanying drawings, a schematic diagram of the power distribution system for an electric vehicle disclosed in the present invention is described in detail. Although the drawings are provided to illustrate some embodiments of the present invention, they are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut away to better illustrate and explain the disclosure of the present invention. Some components in the drawings may be repositioned as needed without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0025] Certain directional terms used in the following description of the drawings, such as "inner," "outer," "above," "below," and other directional terms, should be understood to have their normal meanings and refer to those directions when the drawings are normally viewed. Unless otherwise indicated, the directional terms used in this specification are generally in accordance with conventional directions understood by those skilled in the art.

[0026] The terms "first", "first", "second", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are used to distinguish one component from other components.

[0027] The terms "joining", "connection" and similar terms used in the present invention include both indirect connection of two components with the aid of an intermediate layer such as an adhesive, a welder, etc. or an intermediate piece such as a connector, a transition piece, etc., and direct connection of two components without the aid of any intermediate layer such as an adhesive, a welder, etc. or an intermediate piece such as a connector, a transition piece, etc.

[0028] Figures 1 to 4 The present invention illustrates a power distribution system 100 for an electric vehicle. This system includes a fuse 10 and a mounting base 20. The fuse 10 and mounting base 20 are pluggable and mated, resulting in a reduced number of components and simplified assembly and installation. This system is particularly suitable for electric vehicles with limited installation space. As shown, the fuse 10 includes a fuse body 11 and a pair of connecting terminals 12. The mounting base 20 includes an insertion hole, a latching protrusion 21, and a retaining protrusion 22.

[0029] Specifically, the fuse body 11 may include a fusible tube 111 and a fusible element. The fusible tube 111 may be supported by insulating materials such as ceramics or plastics. The fusible tube 111 may be a cylindrical structure extending in the axial direction, with an axially extending mounting cavity provided inside and open at both axial ends, so that the mounting cavity inside the fusible tube 111 is connected to the external environment. The fusible element may be made of a conductive material, such as a copper busbar, which extends axially in the mounting cavity of the fusible tube 111. A pair of connecting terminals 12 are respectively installed at the axial ends of the fusible tube 111 and connected to the axial ends of the fusible element, thereby enclosing the fusible element in the mounting cavity of the fusible tube 111 and connecting the fusible element in series with the circuit in the electric vehicle via the connecting terminals 12. It can be understood that the "horizontal" mentioned herein is Figures 3 to 5 The left and right directions shown in the Figures 3 to 5 The up and down directions shown in .

[0030] The connecting terminal 12 includes an end cap 121 and a contact blade 122. The end cap 121 is constructed as a disc with the same cross-sectional shape as the fuse tube 111, but with a slightly larger diameter. This allows the end cap 121 to be sleeved onto the inner circumference of the corresponding axial end of the fuse tube 111 with an interference fit, thereby tightly connecting the end cap 121 and the fuse tube 111. This not only makes the connecting terminal 12 of the present invention particularly suitable for fuse tubes 111 with larger diameters, but also allows the axial outer surface of the end cap 121 to remain flush with the axial end surface of the fuse tube 111, ensuring an aesthetically pleasing and neat appearance. Furthermore, the contact blade 122 can be integrally formed with the end cap 121. This not only reduces the number of components in the fuse 10 and simplifies the assembly process, but also allows the contact blade 122 and end cap 121 to maintain sufficient connection strength while maintaining a small contact area, compared to conventional methods where the contact blade 122 and end cap 121 must be welded together.

[0031] The contact blade 122 may include a connecting section 1221 and a plug-in section 1222, the connecting section 1221 extending axially away from the end cover 121 for a certain distance from the axially outer side of the end cover 121, and the plug-in section 1222 may extend vertically from the end of the connecting section 1221 away from the end cover 121 until it exceeds the outer peripheral surface of the fuse tube 111, so that when the fuse 10 is placed on the mounting base 20, the fuse 10 can be plugged into the socket of the mounting base 20 via a pair of plug-in sections 1222 extending beyond the outer surface of the fuse tube 111, thereby connecting the fuse 10 to the mounting base 20. In this way, the connecting section 1221 connected to the end cover 121 and the plug-in section 1222 connected to the mounting seat 20 are arranged perpendicular to each other, which can minimize the impact on the connection between the connecting section 1221 and the end cover 121 when a pair of plug-in sections 1222 are plugged into the sockets of the mounting seat 20 and axially move away from or approach each other due to manufacturing errors between the sockets.

[0032] The engaging protrusion 21 on the mounting base 20 can be arranged on the side of the insertion hole away from the fuse 10, while the limiting protrusion 22 can be arranged on the side of the insertion hole closer to the fuse 10. The vertical extension height of the engaging protrusion 21 is greater than the vertical extension height of the limiting protrusion 22. Therefore, when the fuse 10 is inserted into the insertion hole of the mounting base 20 via the plug section 1222, the plug section 1222 forces the engaging protrusion 21 to deform, allowing the plug section 1222 to enter the insertion hole of the mounting base 20 until the side of the connecting section 1221 facing the insertion hole abuts the limiting protrusion 22. At the same time, the engaging protrusion 21 returns to its original shape and abuts against the side of the connecting section 1221 facing away from the insertion hole, thereby completing the insertion of the fuse 10 into the mounting base 20.

[0033] Alternatively, as shown in the figure, the connecting section 1221 may extend axially away from the end cover 121 from the center of the end cover 121. When the end cover 121 is configured as a disc structure as shown in the figure, the connecting section 1221 may be considered to extend from the center of the end cover 121, which can maximize the width of the connecting section 1221, thereby improving the mechanical strength of the connecting section 1221.

[0034] Optionally, as shown in the figure, the connection section 1221 and the plug section 1222 of the contact blade 122 have a smooth transition to avoid forming a sharp structure between the connection section 1221 and the plug section 1222, thereby improving the electric field distribution of the fuse 10. Furthermore, when the engaging protrusions 21 on the mounting base 20 are arranged axially outward of the corresponding receptacle, that is, on both axial sides of the fuse 10, the engaging protrusions 21 can be guided along the arcuate surface between the connection section 1221 and the plug section 1222 to the upper surface of the connection section 1221, so that the lower surface of the engaging protrusion 21 abuts the upper surface of the connection section 1221. In an embodiment not shown, the upper surface of the connection section 1221 can be provided with a structure such as a engaging groove to mate with the end of the engaging protrusion 21.

[0035] Optionally, as shown in the figure, the insertion section 1222 of the contact blade 122 may be provided with a connection hole 1223, so that the fuse 10 can be fastened to the mounting base 20 via the connection hole 1223 using external fasteners. This arrangement not only improves the connection strength between the fuse 10 and the mounting base 20, but also makes the fuse 10 provided by the present invention suitable for application scenarios where fasteners are used for installation, thereby expanding the applicability of the electric vehicles provided by the present invention. In an embodiment not shown, the connection hole 1223 can also be provided on the connection section 1221 of the contact blade 122.

[0036] Optionally, in an embodiment not shown, a process hole may be further provided on the plug section 1222 of the contact blade 122 to facilitate the processing and assembly of the connecting terminal 12 .

[0037] Optionally, as shown in the figure, the thickness of the end of the plug section 1222 away from the connecting section 1221 gradually decreases, so that the end of the plug section 1222 away from the connecting section 1221 becomes thinner, so as to facilitate the insertion of the fuse 10 into the mounting seat 20.

[0038] Optionally, as shown in the figure, one of the end covers 121 may be provided with a sand filling hole 1211 running through the axial direction. The arc-extinguishing filler can be filled into the installation cavity of the melting tube 111 through the sand filling hole 1211 and cover the fusible parts. After the filling is completed, the sand filling hole 1211 is sealed by plugging, thereby isolating the interior of the melting tube 111 from the external environment.

[0039] 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 can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0040] 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 person skilled in the art 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 power distribution system (100) for an electric vehicle, characterized in that: The power distribution system (100) comprises: A fuse (10) comprises an axially extending fuse body (11) and a pair of connecting terminals (12) extending from both axial ends of the fuse body (11), each connecting terminal (12) comprising an end cover (121) and a contact blade (122) integrally formed with the end cover (121), the end cover (121) being mounted to a corresponding axial end of the fuse body (11), the contact blade (122) comprising a connecting section (1221) extending axially away from the end cover (121) for a certain distance from the axial outer side of the end cover (121) and a plug-in section (1222) extending vertically from an end of the connecting section (1221) away from the end cover (121) to extend beyond the fuse body (11); The mounting seat (20) is provided with a socket for inserting the portion of the plug-in section (1222) extending beyond the fuse body (11), a snap-on protrusion (21) extending toward the connecting section (1221) until it can snap onto the side of the connecting section (1221) facing away from the socket, and a limiting protrusion (22) extending toward the connecting section (1221) until it can abut against the side of the connecting section (1221) facing the socket.

2. The power distribution system (100) for electric vehicles according to claim 1, characterized in that: The fuse body (11) comprises: A melting tube (111) is provided with an installation cavity extending in the axial direction and open at both axial ends, and end covers (121) of the pair of connecting terminals (12) are respectively installed at both axial ends of the melting tube (111) to close the installation cavity of the melting tube (111); A fusible component extends axially in the installation cavity of the melting tube (111), and both axial ends of the fusible component are respectively connected to the axial inner side of the corresponding end cover (121).

3. The power distribution system (100) for electric vehicles according to claim 1, characterized in that: The connecting section (1221) extends axially from the center of the corresponding end cover (121) away from the corresponding end cover (121).

4. The power distribution system (100) for electric vehicles according to claim 2, characterized in that: The end cover (121) is sleeved on the inner circumferential surface of the corresponding axial end of the melting tube (111) by interference fit.

5. The power distribution system (100) for electric vehicles according to claim 1, characterized in that: There is a smooth transition between the connecting section (1221) and the plug-in section (1222) of the contact blade (122).

6. The power distribution system (100) for electric vehicles according to claim 1, characterized in that: A connecting hole (1223) is provided on the connecting section (1221) or the plug-in section (1222) of the contact blade (122).

7. The power distribution system (100) for electric vehicles according to claim 1, characterized in that: The thickness of the plug-in section (1222) gradually decreases at the end away from the connecting section (1221).

8. The power distribution system (100) for electric vehicles according to claim 2, characterized in that: The end cover (121) of one of the pair of connecting terminals (12) is provided with a sand filling hole (1211) extending through the end cover (1211); the fuse (10) further comprises an arc-extinguishing filler filled into the installation cavity of the melting tube (111) through the sand filling hole (1211) and a plug for sealing the sand filling hole (1211).

9. An electric vehicle, characterized in that: The electric vehicle comprises a power distribution system (100) according to any one of claims 1 to 8.

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