Fuse protector, fuse installation structure and automobile BDU

Abstract

The utility model relates to the technical field of automobile BDUs, and provides a fuse protector, a fuse mounting structure and an automobile BDU, the fuse protector comprises an insulating base and mounting feet, the insulating base is provided with an accommodating groove and heat dissipation holes, the accommodating groove is used for placing a fuse, the insulating base wraps a part of the outer surface of the fuse, and the heat dissipation holes are used for heat dissipation of the fuse. The heat dissipation holes are formed in the outer side of the insulating seat and are communicated with the interior of the accommodating groove, so that the electric clearance and the creepage distance between the fuse and a conductive part of the fuse are increased; the mounting feet are fixed on the outer side of the insulating seat, through holes are formed in the mounting feet, the through holes are used for fixing fuse terminals, and the mounting feet are used for fixing the insulating seat outside the automobile BDU. According to the fuse protection device, the fuse mounting structure and the automobile BDU, the fuse and the mounting position of the fuse can be spaced by one insulating seat, so that the electrical gap and the creepage distance between the fuse and other conductive parts are increased, and the safety of an electrical loop is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile BDU, in particular to a fuse protection device, a fuse installation structure and an automobile BDU. Background Art

[0002] At present, with the rise of the new energy industry, the development of new energy vehicles has become a top priority. As the core module of new energy vehicles, the Pack is constantly being upgraded, and the integrated design of the battery disconnect device in the Pack, that is, the vehicle BDU, has become a top priority.

[0003] The current mainstream design is to integrate the main circuit fuse into the BDU, such as an electric vehicle BDU structure with publication number CN210047337U, which reduces the installation space of the BDU and improves the reliability of BMS control by integrating fuses and other functional components into a single BDU.

[0004] Considering that there are many electrical components inside the BDU, especially fuses, which are more likely to generate heat than other electrical components and electrical connectors and occupy a larger space, it is not uncommon to place the fuse outside the BDU and inside the Pack. However, due to space constraints, the two ends of the fuse are fixed in the Pack through insulating columns without other protective measures, which will result in the electrical clearance and creepage distance between the fuse and the Pack box being too close, failing to meet standard requirements and posing a high risk. Utility Model Content

[0005] In view of this, the utility model proposes a fuse protection device, a fuse installation structure and an automobile BDU. By providing an insulating seat and a mounting foot, the protection device is set at the position where the fuse needs to be installed, and then the fuse is installed through the protection device to protect the fuse and increase the electrical clearance and creepage distance between the fuse and the Pack box.

[0006] The technical solution of the utility model is achieved in this way:

[0007] On the one hand, the utility model provides a fuse protection device, including an insulating seat and a mounting foot, wherein:

[0008] The insulating seat is provided with a receiving groove and a heat dissipation hole, the receiving groove is used to place the fuse, so that the insulating seat covers part of the outer surface of the fuse to increase the electrical gap and creepage distance between the fuse and its conductive parts, and the heat dissipation hole is located outside the insulating seat and communicated with the inside of the receiving groove;

[0009] The mounting foot is fixed on the outside of the insulating seat, and a through hole is provided on the mounting foot. The through hole is used to fix the fuse terminal, and the mounting foot is used to fix the insulating seat on the outside of the automobile BDU.

[0010] On the basis of the above technical solution, preferably, the insulating seat includes a shell and structural ribs, wherein:

[0011] The housing is fixed to the mounting foot, and one side of the housing is opened;

[0012] There are multiple structural ribs, which are fixed at equal intervals on the inner wall of the shell away from the opening side, and the structural ribs are used to contact and support the fuse.

[0013] Further preferably, the structural ribs are provided with arcuate surfaces, and the arcuate surfaces on each of the structural ribs face the opening side of the shell to form the accommodating grooves.

[0014] Further preferably, there are multiple heat dissipation holes, which are distributed between the ends of two adjacent structural ribs.

[0015] Further preferably, a fitting surface is provided on a side of the shell away from the opening, and the fitting surface and a side of the mounting foot away from the opening of the shell are located on the same plane.

[0016] On the basis of the above technical solution, preferably, the number of the mounting feet is two, and the two mounting feet are symmetrically arranged on both sides of the insulating seat.

[0017] On the basis of the above technical solution, preferably, it further comprises reinforcing ribs, wherein the reinforcing ribs are fixed at the connection between the mounting foot and the insulating seat.

[0018] On the basis of the above technical solution, preferably, a mounting hole is provided on the mounting foot.

[0019] On the other hand, the utility model provides a fuse installation structure, including an insulating column and the above-mentioned fuse protection device, the insulating column passes through the mounting foot through a through hole and is fixed relative to the insulating seat, the fuse is inserted into the accommodating groove, and the fuse terminal is fixed on one end of the insulating column away from the mounting foot.

[0020] On the other hand, the utility model provides an automobile BDU, comprising the above-mentioned fuse protection device, wherein the fuse protection device is arranged on the outside of the BDU housing.

[0021] The fuse protection device, fuse installation structure and automobile BDU of the utility model have the following beneficial effects compared with the prior art:

[0022] (1) By providing an insulating seat and a mounting foot, the mounting foot can fix the insulating seat at the installation position of the fuse without affecting the original installation structure of the fuse. After the mounting foot is fixed, the insulating seat is located at the original installation position of the fuse. At this time, the fuse can be inserted into the receiving groove, and the fuse terminal can be fixed on the insulating column, so that the fuse and its installation position can be separated by an insulating seat, thereby increasing the electrical clearance and creepage distance between the fuse and other conductive parts, and improving the safety of the electrical circuit;

[0023] (2) Structural ribs are provided, and the fuse is divided into an upper and a lower part with the connection line of the two terminals of the fuse as the dividing line. The lower part is inserted into the receiving groove, and the outer surface of the lower part contacts the structural ribs. The fuse is supported inside the shell by the structural ribs, thereby achieving stable installation of the fuse. Correspondingly, since the structural ribs are arranged in an intermittent manner, heat dissipation channels are formed between the structural ribs, thereby preventing the lower surface of the fuse from completely contacting the structural ribs, which would result in the inability to dissipate heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A three-dimensional diagram of the fuse protection device of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the fuse protection device of the utility model;

[0027] Figure 3 It is a schematic diagram of the fuse installation structure of the utility model;

[0028] Figure 4 It is a partial structural schematic diagram of the automobile BDU of the utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] like Figure 1-2As shown, the fuse protection device of the utility model comprises an insulating seat 1 and a mounting foot 2.

[0031] The insulating seat 1 is provided with a receiving groove 101 and a heat dissipation hole 102. The receiving groove 101 is used to place the fuse, so that the insulating seat 1 covers part of the outer surface of the fuse to increase the electrical gap and creepage distance between the fuse and its conductive parts. The heat dissipation hole 102 is located on the outside of the insulating seat 1 and is connected to the inside of the receiving groove 101. The insulating seat 1 is in the shape of a square shell as a whole and is injection molded with an insulating material. One side of the insulating seat is opened to form the receiving groove 101. The receiving groove 101 is compatible with the cylindrical fuse, so that the fuse can be placed in the receiving groove 101. The heat dissipation hole 102 can prevent the insulating seat 1 from forming a closed cavity outside the fuse after the fuse is placed in the receiving groove 101, thereby improving the heat dissipation performance of the insulating seat 1.

[0032] The mounting foot 2 is fixed on the outside of the insulating seat 1. The mounting foot 2 is provided with a through hole 201. The through hole 201 is used to fix the fuse terminal. The mounting foot 2 is used to fix the insulating seat 1 on the outside of the automobile BDU.

[0033] Specifically, the mounting foot 2 and the insulating seat 1 are made of the same insulating material, which can be PET plastic. In actual production, the mounting foot 2 and the insulating seat 1 can be injection molded by integral injection molding. In order not to affect the original mounting structure of the fuse, a through hole 201 is provided on the mounting foot 2, so that the insulating column 10 connected to the fuse terminal can pass through the mounting foot 2 through the through hole 201 after being fixed. The mounting foot 2 can be fixed at the installation position of the fuse without affecting the original mounting structure of the fuse. After the mounting foot 2 is fixed, the insulating seat 1 is located at the original installation position of the fuse. At this time, the fuse can be inserted into the accommodating groove 101, and the fuse terminal can be fixed on the insulating column 10, so that the fuse and its installation position can be separated by an insulating seat 1, thereby increasing the electrical clearance and creepage distance between the fuse and other conductive components, and improving the safety of the electrical circuit.

[0034] In this embodiment, the insulating seat 1 includes an outer shell 11 and structural ribs 12. The outer shell 11 is fixed to the mounting foot 2. One side of the outer shell 11 is opened. The outer shell 11 is in a rectangular shape as a whole. The accommodating groove 101 is arranged on its open side. There are multiple structural ribs 12, which are fixed at equal intervals on the inner wall of the outer shell 11 away from the open side. The structural ribs 12 are used to contact and support the fuse. During specific installation, the fuse is divided into an upper and lower part with the connecting line of the two terminals of the fuse as the dividing line. The lower part is inserted into the accommodating groove 101, and the outer surface of the lower part contacts the structural ribs 12. The fuse is supported inside the outer shell 11 by the structural ribs 12, thereby achieving stable installation of the fuse. Correspondingly, since the structural ribs 12 are arranged in an intermittent manner, a heat dissipation channel is formed between the structural ribs 12, thereby preventing the lower surface of the fuse from completely contacting each structural rib 12, which causes the heat to be unable to dissipate.

[0035] Correspondingly, an arc surface 121 is provided on the structural rib 12, and each arc surface 121 on the structural rib 12 faces the opening side of the shell 11 to form the accommodating groove 101. The arc surface 121 is adapted to the lower surface of the fuse. After the fuse is placed in the accommodating groove 101, the structural rib 12 and the fuse are stably fitted to position the fuse and avoid the occurrence of problems such as poor connection caused by its deviation.

[0036] In addition, in the present embodiment, a plurality of heat dissipation holes 102 are provided and are distributed between the ends of two adjacent structural ribs 12 to connect the heat dissipation channels formed between the structural ribs 12, so that the fuse is inserted into the lower part of the accommodating groove 101 and can exchange heat with the outside air. It should be noted that the heat dissipation holes 102 are symmetrically distributed on both sides of the outer shell 11, so that both ends of each heat dissipation channel can be connected to the outside world for heat dissipation of the fuse.

[0037] In this embodiment, a fitting surface is provided on the side of the shell 11 away from the opening, and the fitting surface and the side of the mounting foot 2 away from the opening of the shell 11 are located on the same plane. The fitting surface is located on the side of the shell 11 opposite to the accommodating groove 101, and it needs to fit the plate for installing the fuse. The plate may be a BDU shell or a plate on a Pack package body. In order to avoid the connection position between the mounting foot 2 and the insulating seat 1 being broken due to the different distances between the shell 11 and the mounting foot 2 to the installation position during installation, the fitting surface is arranged to be on the same plane as the side of the mounting foot 2 contacting the plate. The fitting surface of the shell 11 and the mounting foot 2 can be installed by contacting the plate at the same time, thereby improving the stability of the installation and avoiding the increase in the risk of fuse use due to component breakage.

[0038] In this embodiment, there are two mounting feet 2, and the two mounting feet 2 are symmetrically arranged on both sides of the insulating seat 1. Specifically, the two mounting feet 2 are located on the sides of the two terminals when the fuse is installed, and the lengths of the two mounting feet 2 are slightly longer than the terminals of the fuse, thereby avoiding increasing the space occupied by the device when the fuse is installed, and after the mounting feet 2 are fixed, they will not affect the normal installation and connection of the fuse terminals, and the two stacked mounting feet 2 can also stably fix the insulating seat 1.

[0039] In order to further enhance the connection strength between the mounting foot 2 and the insulating seat 1, in the present embodiment, a reinforcing rib 3 is further provided, and the reinforcing rib 3 is fixed at the connection between the mounting foot 2 and the insulating seat 1. Since two mounting feet 2 are provided, the corresponding number of reinforcing ribs 3 needs to be set to four, and two are set in a group and are respectively provided on the two mounting feet 2. The reinforcing rib 3 is the same as the mounting foot 2 and the insulating seat 1, and is manufactured by integral injection molding. A single reinforcing rib 3 is in the shape of an isosceles triangle, and its two waists are respectively connected to the mounting foot 2 and the insulating seat 1, thereby improving the stability of the mounting foot 2 and the insulating seat 1.

[0040] It should be noted that a mounting hole 202 is also provided on the mounting foot 2. Through the provided mounting hole 202, the mounting foot 2 can be directly fixed to the board to be installed by means of screws and other components, thereby completing the installation of the device. Specifically, first, the two mounting feet 2 are fixed to the board or structural member on which the fuse is to be installed through the mounting holes 202, and then the fuse is inserted into the accommodating groove 101, and the fuse is fixed and connected to the circuit.

[0041] like Figure 3 As shown, the fuse installation structure of the utility model includes an insulating column 10 and the above-mentioned fuse protection device. The insulating column 10 passes through the mounting foot 2 through the through hole 201 and is relatively fixed to the insulating seat 1. The fuse is inserted into the accommodating groove 101, and the fuse terminal is fixed on the end of the insulating column 10 away from the mounting foot 2.

[0042] In this embodiment, a Pack box is also included. There are two insulating columns 10, and one end of each is fixed on the box and perpendicular to the box. During installation, the insulating column 10 is first fixed to the box, and then the through holes 201 of the two mounting feet 2 are put onto the outside of the two insulating columns 10, and the mounting feet 2 are fixed to the box through the mounting holes 202 using screws and other components. The remaining steps can refer to the installation steps of the above-mentioned fuse.

[0043] like Figure 4As shown, the automobile BDU of the utility model includes the above-mentioned fuse protection device, which is arranged on the outside of the BDU shell. The specific installation steps are consistent with the above-mentioned installation structure, and the difference is that the above-mentioned Pack package box is replaced by the BDU shell.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuse protection device, characterized in that: It comprises an insulating seat (1) and a mounting foot (2), wherein: The insulating seat (1) is provided with a receiving groove (101) and a heat dissipation hole (102); the receiving groove (101) is used to accommodate a fuse, so that the insulating seat (1) covers a portion of the outer surface of the fuse to increase the electrical gap and creepage distance between the fuse and its conductive parts; the heat dissipation hole (102) is located outside the insulating seat (1) and communicates with the inside of the receiving groove (101); The mounting foot (2) is fixed on the outside of the insulating seat (1); a through hole (201) is provided on the mounting foot (2); the through hole (201) is used to fix a fuse terminal; and the mounting foot (2) is used to fix the insulating seat (1) on the outside of a vehicle BDU.

2. The fuse protection device according to claim 1, characterized in that: The insulating seat (1) comprises a shell (11) and structural ribs (12), wherein: The outer shell (11) is fixed to the mounting foot (2), and one side of the outer shell (11) is opened; There are a plurality of structural ribs (12) which are fixed at equal intervals on the inner wall of the housing (11) away from the opening side, and the structural ribs (12) are used to contact and support the fuse.

3. The fuse protection device according to claim 2, characterized in that: The structural ribs (12) are provided with arc-shaped surfaces (121), and the arc-shaped surfaces (121) on each of the structural ribs (12) face the opening side of the outer shell (11) to form the accommodation groove (101).

4. The fuse protection device according to claim 2, characterized in that: The heat dissipation holes (102) are multiple in number and are distributed between the ends of two adjacent structural ribs (12).

5. The fuse protection device according to claim 2, characterized in that: A fitting surface is provided on the side of the shell (11) away from the opening, and the fitting surface and the side of the mounting foot (2) away from the opening of the shell (11) are located on the same plane.

6. The fuse protection device according to claim 1, characterized in that: The number of the mounting feet (2) is two, and the two mounting feet (2) are symmetrically arranged on both sides of the insulating seat (1).

7. The fuse protection device according to claim 1, characterized in that: It also includes a reinforcing rib (3), which is fixed at the connection between the mounting foot (2) and the insulating seat (1).

8. The fuse protection device according to claim 1, characterized in that: The mounting foot (2) is provided with a mounting hole (202).

9. A fuse installation structure, characterized in that: It comprises an insulating column (10) and a fuse protection device as claimed in any one of claims 1 to 8, wherein the insulating column (10) passes through a mounting foot (2) through a through hole (201) and is fixed relative to an insulating seat (1), the fuse is inserted into a receiving groove (101), and the fuse terminal is fixed on an end of the insulating column (10) away from the mounting foot (2).

10. An automobile BDU, characterized in that: It comprises the fuse protection device according to any one of claims 1 to 8, wherein the fuse protection device is arranged on the outside of the BDU shell.

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