Maintenance switch plug and bottom cover plate thereof

Abstract

The utility model relates to a maintenance switch plug and a bottom cover plate thereof, the maintenance switch plug comprises a plug shell, a fuse is installed in an inner cavity of the plug shell, two ends of the fuse are respectively connected with plugging terminals used for being adaptively plugged with a socket, and the bottom cover plate is installed at a bottom opening of the plug shell. A plate body of the bottom cover plate is provided with an avoiding through hole for a plugging terminal of a maintenance switch plug to pass through, the middle position of the plate body is provided with a pouring hole for pouring glue, the middle part of the plate body is provided with a glue blocking enclosure bulkhead extending towards the inner side of a plug shell, the avoiding through hole is arranged at the outer side of the glue blocking enclosure bulkhead, and the pouring hole is communicated with an inner cavity enclosed by the glue blocking enclosure bulkhead. And the glue blocking enclosure bulkhead extends to a position near the root part of the plug terminal so as to be matched with the top surface of heat-conducting glue which is pre-poured and solidified in the plug shell to define a secondary glue pouring cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of maintenance switch especially relates to a maintenance switch plug and bottom cover plate thereof. BACKGROUND

[0002] Based on the further development of the current commercial vehicle industry, more and more commercial vehicles and high-end passenger vehicle battery packs will be equipped with manual maintenance switches, namely MSD. The MSD has a built-in fuse for quickly disconnecting the high-voltage loop during maintenance and achieving abnormal large current or short circuit protection.

[0003] Based on the further demand of the whole vehicle for large current charging and discharging, it is required that the larger the specification of the fuse is, the better, so as to improve the current carrying capacity of the battery system. However, the larger the specification of the fuse is, the greater the temperature rise is, and better heat dissipation is required.

[0004] In the prior art, a battery box, a maintenance switch and a plug thereof are disclosed in Chinese patent application No. CN113793788A published on December 14, 2021. The maintenance switch plug of the invention comprises a main housing having a receiving cavity, a fuse element, namely a fuse, is arranged in the main housing, a plug-in terminal is also provided in the main housing, and a sealing plate is connected to the main housing and provided with an opening for pouring glue and observing the amount of poured glue. Heat-conducting glue is filled between the cavity wall of the main housing and the fuse to transfer the heat of the fuse to the main housing. The height of the poured heat-conducting glue is flush with or slightly covers the fuse, so as to avoid too much glue pouring into the plug-in terminal, thereby reducing the temperature rise of the fuse and preventing the fuse from melting after the battery cell or other high-voltage devices, which cannot play the expected role of abnormal large current protection, and even cause the battery system to catch fire.

[0005] However, the maintenance switch plug of the invention needs to be observed in time through the opening for observing the amount of poured glue provided on the sealing plate when pouring the heat-conducting glue, and the pouring is divided into multiple times. If there is any carelessness, it will lead to too much glue pouring, causing the heat-conducting glue to flow to the terminal in the maintenance switch plug and affecting the electrical connection of the maintenance switch. If the amount of poured glue is too little, the heat-conducting glue cannot completely cover the fuse, and the heat dissipation effect is not obvious. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a maintenance switch plug for solving the problem that the amount of poured glue is difficult to control when pouring heat-conducting glue in the maintenance switch plug in the prior art, and the heat dissipation capacity cannot be maximized. The utility model also aims to provide a bottom cover plate of the maintenance switch plug for solving the above problem.

[0007] To solve the above technical problems, the utility model adopts the following technical solutions.

[0008] The utility model provides a bottom cover plate of maintenance switch plug, including the plate body, the plate body is equipped with the hole avoiding of the plug -in terminal of maintenance switch plug, the middle position of plate body is equipped with the injection hole for pouring glue, the middle part of plate body is equipped with the glue blocking wall extending to the inside of plug shell, the hole avoiding is outside the glue blocking wall, the inner chamber of injection hole and glue blocking wall is communicated to pour the heat conducting glue into the inner chamber.

[0009] Further, the glue blocking wall is a square wall, including wall body parts extending along both side edges of the plate body in the width direction and a wall body part extending in the width direction, the side of the wall body part extending in the width direction constitutes part of the inner hole wall of the hole avoiding.

[0010] Further, the plate body is further provided with a connecting lug connected with the maintenance switch plug.

[0011] Further, the plate body is provided with four injection holes.

[0012] Further, the plate body is further provided with a high-voltage interlock mounting structure at the middle position of the four injection holes.

[0013] The above technical scheme has the beneficial effects that the utility model improves the bottom cover plate, including the plate body, the plate body is equipped with the hole avoiding of the plug -in terminal of maintenance switch plug, the middle position of plate body is equipped with the injection hole for pouring glue, the middle position of plate body is equipped with the injection hole for pouring glue, the middle part of plate body is equipped with the glue blocking wall extending to the inside of plug shell, the hole avoiding is outside the glue blocking wall, the inner chamber of injection hole and glue blocking wall is communicated to pour the heat conducting glue into the inner chamber, when pouring the heat conducting glue into the plug of maintenance switch, the glue blocking wall can block the heat conducting glue from flowing to the terminal, thereby greatly increasing the amount of pouring heat conducting glue, and the heat conducting glue completely covers the fuse, thereby maximizing the heat dissipation capacity.

[0014] A maintenance switch plug, including plug shell, the inner chamber of plug shell is installed with fuse, the both ends of fuse are connected with the plug -in terminal for adapting plug -in with socket respectively, the bottom opening of plug shell is equipped with bottom cover plate, the plate body of bottom cover plate is equipped with the hole avoiding of the plug -in terminal of maintenance switch plug, the middle position of plate body is equipped with the injection hole for pouring glue, the middle part of plate body is equipped with the glue blocking wall extending to the inside of plug shell, the hole avoiding is outside the glue blocking wall, the inner chamber of injection hole and glue blocking wall is communicated, the glue blocking wall extends to the position near the root of plug -in terminal, to cooperate with the top surface of heat conducting glue pre-poured and solidified in plug shell and form secondary glue pouring cavity.

[0015] Further, the glue blocking wall is a square wall, comprising a wall part extending along the two side edges of the plate body in the width direction and a wall part extending in the width direction, the side of the wall part extending in the width direction constituting the inner hole wall of the portion of the avoiding perforation.

[0016] Further, the plate body is further provided with a connecting lug connected with the maintenance switch plug.

[0017] Further, the pouring hole formed on the plate body is four.

[0018] Further, the plate body is further provided with a high-pressure interlocking mounting structure at the middle position of the four pouring holes.

[0019] The beneficial effects of the above technical scheme are: the utility model improves and provides a maintenance switch plug, which comprises a plug shell, a fuse is mounted in the inner cavity of the plug shell, plug-in terminals for adapting to plug-in connection with a socket are connected to the two ends of the fuse, a bottom cover plate is mounted at the opening of the bottom of the plug shell, the plate body of the bottom cover plate is provided with an avoiding perforation for the plug-in terminals of the maintenance switch plug to pass through, a pouring hole for pouring glue is formed at the middle position of the plate body, a glue blocking wall extending towards the inner side of the plug shell is arranged at the middle part of the plate body, the avoiding perforation is located at the outer side of the glue blocking wall, the pouring hole and the inner cavity surrounded by the glue blocking wall are in communication, the glue blocking wall extends to the position near the root of the plug-in terminals, so as to cooperate with the top surface of the heat-conducting glue pre-poured and solidified in the plug shell to surround a secondary glue pouring cavity, so that the glue blocking wall can block the heat-conducting glue from flowing to the terminals when the secondary glue is poured, thereby greatly increasing the amount of poured heat-conducting glue, and the heat-conducting glue completely covers the fuse, so as to maximize the heat dissipation capacity. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic view of the maintenance switch plug of the utility model;

[0021] Figure 2 It is a top view of the maintenance switch plug of the utility model;

[0022] Figure 3 It is a schematic view of one embodiment of the bottom cover plate of the utility model;

[0023] Figure 4 It is an exploded view of the maintenance switch plug of the utility model.

[0024] In the drawing: 1, plug shell; 2, plug-in terminal; 3, waterproof rubber ring; 4, high-pressure interlocking mounting structure; 5, pouring hole; 6, avoiding perforation; 7, connecting lug; 8, glue blocking wall; 9, secondary pouring heat-conducting glue. DETAILED DESCRIPTION

[0025] The features and performances of the utility model are further described in detail in combination with the embodiments below.

[0026] The utility model provides a bottom cover plate of maintenance switch, including board body, the board body is equipped with the avoidance perforation that the maintenance switch plug passes through, the middle position of board body is equipped with the injection hole for pouring glue, the board body is equipped with the glue blocking wall that extends to the inside of plug shell through being equipped with in the middle part of board body, the avoidance perforation is in the outside of glue blocking wall, the inner chamber that glue blocking wall encloses with injection hole is connected so as to pour heat conducting glue in the inner chamber. When pouring heat conducting glue, can not need to observe the flow direction of heat conducting glue, can avoid heat conducting glue flow direction terminal and influence electric connection, can also increase the glue pouring amount simultaneously, makes heat conducting glue can completely cover the fuse, can maximize improve the heat dissipation capacity.

[0027] According to the above idea, the utility model provides a plurality of different maintenance switch plug embodiments for illustration.

[0028] In a basic embodiment, the maintenance switch plug includes a plug shell 1, a fuse is installed in the inner chamber of the plug shell 1, the two ends of the fuse are respectively connected with plug-in terminals 2 for adapting plug-in with the socket, the bottom cover plate is installed at the opening of the bottom of the plug shell 1, and a waterproof rubber ring 3 is arranged at the opening of the plug shell 1.

[0029] As shown in the figure, Figure 3 The board body of the bottom cover plate is provided with an avoidance perforation 6 for the plug-in terminal 2 of the maintenance switch plug to pass through, the middle position of the board body is provided with an injection hole 5 for pouring glue, the middle part of the board body is provided with a glue blocking wall 8 extending to the inside of the plug shell 1, the avoidance perforation 6 is located at the outside of the glue blocking wall 8, the inner chamber surrounded by the injection hole 5 and the glue blocking wall 8 is connected, and the glue blocking wall 8 extends to the position near the root of the plug-in terminal 2 to form a secondary glue pouring cavity in cooperation with the top surface of the heat conducting glue pre-poured and solidified in the plug shell 1.

[0030] On the basis of the above embodiment, the glue blocking wall 8 can be a circular wall or a rhombic wall, as long as it extends to the position near the root of the plug-in terminal, so that the heat conducting glue cannot flow to the plug-in terminal 2. In a preferred embodiment, the glue blocking wall 8 is a square wall, including a wall body part extending along the two side edges of the board body in the width direction and a wall body part extending in the width direction, and the side surface of the wall body part extending in the width direction constitutes part of the inner hole wall of the avoidance perforation 6. In this way, more heat conducting glue can be poured during secondary pouring, and the heat dissipation effect is better.

[0031] On the basis of the above embodiment, the bottom cover plate is buckled at the bottom opening of the maintenance switch plug, and heat conducting glue is poured into the maintenance switch plug through the injection hole 5. In a preferred embodiment, as shown in the figure, Figures 2-4As shown, the cover plate is provided with a connecting lug 7 for fixed connection with the maintenance switch plug, so that when the heat-conducting glue is poured, the bottom cover plate will not shake on the maintenance switch plug due to the effect of the heat-conducting glue, so as to prevent the heat-conducting glue from flowing to the plug-in terminal 2 and affecting the electrical connection of the maintenance switch.

[0032] On the basis of the above embodiment, the pouring hole 5 provided on the bottom cover plate can be provided as one large hole, and the heat-conducting glue is poured into the plug of the maintenance switch from one pouring hole 5. In a preferred embodiment, as shown in Figures 1-4 As shown, the pouring hole 5 provided on the cover plate is four, and the four pouring holes 5 are provided at the middle position of the cover plate body, so that the heat dissipation capacity can be improved.

[0033] Preferably, as shown in Figures 1-4 As shown, the high-voltage interlock mounting structure 4 is further provided at the middle position of the four pouring holes 5, and after the high-voltage interlock is mounted, the safety of the maintenance personnel during maintenance can be ensured, and the reliability of the equipment can be improved, and the damage of the equipment can be reduced.

[0034] When the heat-conducting glue is poured into the maintenance switch plug of the utility model, a part of the heat-conducting glue is poured first, so that the glue surface is flush with the bottom of the plug-in terminal 2, and then the bottom cover plate is installed on the maintenance switch plug. The heat-conducting glue is poured into the cavity between the fuse and the inner wall of the plug shell 1 in the maintenance switch plug from the pouring hole 5 on the bottom cover plate, the glue blocking surrounding wall 8 on the bottom cover plate extends to the root of the plug-in terminal 2 in the maintenance switch plug, the connecting lug 7 provided on the bottom cover plate is fixedly connected with the maintenance switch plug, so that the poured heat-conducting glue will not flow to the plug-in terminal 2, and the cover plate will not be loose due to the effect of the heat-conducting glue, as shown in Figure 4 As shown, the area surrounded by the glue blocking surrounding wall 8 and the plate body completely wraps the fuse, so that the heat-conducting glue 9 poured for the second time can completely cover the fuse, and the heat dissipation performance is better.

[0035] The structure of the bottom cover plate of the maintenance switch plug of the utility model is consistent with the structure of the bottom cover plate in the above-mentioned maintenance switch plug embodiment, and this paper will not be described in detail.

[0036] The above is only a preferred embodiment of the utility model, and does not limit the utility model, the patent protection scope of the utility model is subject to the claims, and equivalent structural changes made by applying the contents of the specification and drawings of the utility model should also be included in the protection scope of the utility model.

Claims

1. A bottom cover plate for repairing a switch plug, comprising a plate body, wherein an avoiding through hole is formed on the plate body for the plug-in terminal of the switch plug to pass through, and a pouring hole for pouring glue is formed at the middle position of the plate body, characterized in that, The middle part of the plate body is provided with a glue blocking wall extending towards the inner side of the plug shell, the avoiding perforation is located outside the glue blocking wall, the pouring hole is communicated with the inner cavity surrounded by the glue blocking wall to pour the heat-conducting glue into the inner cavity.

2. The bottom cover plate for repairing the plug of the switch according to claim 1, characterized in that, The glue blocking wall is a square wall, including a wall body part extending along the two side edges of the plate body in the width direction and a wall body part extending in the width direction, the side of the wall body part extending in the width direction constitutes part of the inner hole wall of the avoiding perforation.

3. A bottom cover plate for a service switch plug according to claim 1 or 2, characterized in that The plate body is further provided with a connecting lug connected with the maintenance switch plug.

4. The bottom cover plate for repairing a switch plug according to claim 1 or 2, characterized in that, The plate body is provided with four pouring holes.

5. The bottom cover plate for repairing a switch plug according to claim 4, wherein The plate body is further provided with a high-pressure interlocking mounting structure at the middle position of the four pouring holes.

6. A maintenance switch plug, comprising a plug housing, a fuse mounted in the inner cavity of the plug housing, plug-in terminals connected to both ends of the fuse respectively for plug-in connection with a socket, a bottom cover plate mounted at the bottom opening of the plug housing, the plate body of the bottom cover plate being provided with an avoiding perforation for the plug-in terminals of the maintenance switch plug to pass through, and a pouring hole for pouring glue being provided at the middle position of the plate body, characterized in that, The middle part of the plate body is provided with a glue blocking wall extending towards the inner side of the plug shell, the avoiding perforation is located outside the glue blocking wall, the pouring hole is communicated with the inner cavity surrounded by the glue blocking wall, the glue blocking wall extends to the position near the root of the plug-in terminal to cooperate with the top surface of the heat-conducting glue pre-poured and solidified in the plug shell to surround a secondary glue pouring cavity.

7. The service switch plug of claim 6, wherein, The glue blocking wall is a square wall, including a wall body part extending along the two side edges of the plate body in the width direction and a wall body part extending in the width direction, the side of the wall body part extending in the width direction constitutes part of the inner hole wall of the avoiding perforation.

8. A service switch plug according to claim 6 or 7, characterised in that The plate body is further provided with a connecting lug connected with the maintenance switch plug.

9. The service switch plug according to claim 6 or 7, characterized in that The plate body is provided with four pouring holes.

10. The service switch plug of claim 9, wherein, The plate body is further provided with a high-pressure interlocking mounting structure at the middle position of the four pouring holes.

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