High-current-carrying busbar easy to dissipate heat and high-voltage distribution box using high-current-carrying busbar

Abstract

The utility model discloses an easy heat dissipation high current-carrying busbar and a high voltage distribution box, comprising a current-carrying busbar and a component, the current-carrying busbar is fixedly provided with a heat dissipation member through a screw, the bottom of the heat dissipation member is tightly attached to the surface of the current-carrying busbar, the heat dissipation member is vertically provided with a group of heat dissipation plates at intervals, and the heat dissipation plates are fixedly connected with the component. The heat dissipation plate is perpendicular to the surface of the current-carrying busbar so as to dissipate heat of the current-carrying busbar; mounting holes penetrating through the two ends of the heat dissipation piece and the current-carrying busbar are formed between the two ends of the heat dissipation piece and the current-carrying busbar, the screws are arranged in the mounting holes in a penetrating mode, the heads of the screws abut against the surface of the heat dissipation piece, and the bottoms of the screws are in threaded connection with limiting nuts; and the heat dissipation piece and the current-carrying busbar are limited between the head of the screw and the limiting nut. According to the scheme, the heat dissipation piece is arranged on the current-carrying busbar, and the contact area with air is increased through the group of heat dissipation plates which are vertically arranged at intervals, so that the local heat dissipation capability is improved, and the use safety and effectiveness of the connection part are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage distribution boxes, and in particular to a high-current-carrying busbar and a high-voltage distribution box that are easy to dissipate heat. Background Art

[0002] The high-voltage power distribution unit (PDU) is a high-voltage power distribution unit in the high-voltage system solution for new energy vehicles. It electrically connects high-voltage components through busbars and wiring harnesses, and provides charging and discharging control, power-on control of high-voltage components, circuit overload and short-circuit protection, high-voltage sampling, low-voltage control and other functions for the high-voltage system of new energy vehicles, protecting and monitoring the operation of the high-voltage system.

[0003] As the total distribution element of current and voltage, its heat dissipation function has always been a concern of technicians. Conventional heat dissipation methods, such as those disclosed in Chinese patents 201920902631.0, 202223288347.X, and 201820584131.2, are to set a heat dissipation element, such as a fan, on the box body of the high-voltage distribution box.

[0004] However, in high-voltage distribution boxes, the electrical connection between components and current-carrying busbars is usually where heat is generated quickly, and excessive temperature here will hinder the effectiveness of the electrical connection and pose a greater safety risk. How to quickly, effectively and accurately achieve heat dissipation is a solution that can be provided at present. Utility Model Content

[0005] The utility model aims to overcome the deficiencies in the prior art and provide a high-current-carrying busbar and a high-voltage distribution box that are easy to dissipate heat.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A high-current-carrying busbar that is easy to dissipate heat, comprising a current-carrying busbar and components that are fixedly connected to each other, a heat sink is fixedly arranged on the current-carrying busbar by screws, the bottom of the heat sink is in close contact with the surface of the current-carrying busbar, and a group of heat sinks are vertically spaced on the heat sink, the heat sink is perpendicular to the surface of the current-carrying busbar to dissipate heat for the current-carrying busbar; mounting holes that penetrate the two ends of the heat sink and the current-carrying busbar are arranged between the two ends, the screw is inserted into the mounting hole, the head of the screw is in contact with the surface of the heat sink, and a limiting nut is screwed on the bottom of the screw, and the heat sink and the current-carrying busbar are limited between the head of the screw and the limiting nut.

[0008] Preferably, a gasket is provided between the head of the screw and the surface of the heat sink, and the distance between the gasket is larger than the mounting hole.

[0009] Preferably, the bottom diameter of the limiting nut is larger than the mounting hole, and the top thereof has a convex portion, the outer diameter of the convex portion matches the inner diameter of the mounting hole, and when the limiting nut is threadedly connected to the screw, the convex portion is clamped in the mounting hole.

[0010] Preferably, the outer peripheral wall of the protrusion is tooth-shaped.

[0011] Preferably, a heat-conducting layer is coated on the contact surface between the current-carrying busbar and the heat sink.

[0012] Preferably, the end of the component has a waist-shaped hole, the current-carrying busbar is provided with a through hole whose diameter matches the width of the waist-shaped hole, and bolts are passed through the through hole and the waist-shaped hole to fix the current-carrying busbar and the component.

[0013] Preferably, two ends of the component are symmetrically provided with a waist-shaped hole.

[0014] The utility model also discloses a high-voltage distribution box, comprising a shell, and the high-current-carrying busbar as mentioned above which is easy to dissipate heat and is located therein.

[0015] The beneficial effects of the utility model are mainly reflected in:

[0016] 1. A heat sink is arranged on the current-carrying busbar, and a group of heat sinks are arranged vertically at intervals to increase the contact area with the air, so that the current-carrying busbar can be quickly and timely cooled, the local heat dissipation capacity of the connection between the current-carrying busbar and the components is improved, the heat dissipation efficiency is improved, the temperature of the connection between the two is reduced, and the safety and effectiveness of the connection are ensured;

[0017] 2. Place the heat sink and the current-carrying busbar close together, and apply a thermal conductive layer on the contact surface between the two to further improve the heat dissipation efficiency and reduce the temperature in time;

[0018] 3. A limit nut is screwed onto the bottom of the screw, and a convex portion matching the inner diameter of the through hole is set on the top of the limit nut, so that the limit nut can fit tightly with the current-carrying busbar, thereby achieving the purpose of making the heat sink and the current-carrying busbar fit tightly, improving the setting stability of the heat sink, and ensuring that the heat sink and the current-carrying busbar fit tightly to improve the effectiveness and efficiency of heat conduction between the heat sink and the current-carrying busbar. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0020] Figure 1 : A schematic diagram of an embodiment of the utility model;

[0021] Figure 2 : A schematic diagram of another direction of the embodiment of the utility model;

[0022] Figure 3 : A cross-sectional view of an embodiment of the utility model;

[0023] Figure 4 : A schematic diagram of a limit nut in an embodiment of the present utility model. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0025] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0026] like Figures 1 to 4 As shown, the utility model discloses a high current-carrying busbar that is easy to dissipate heat, including a current-carrying busbar 1 and components 2 that are fixedly connected to each other, a heat sink 3 is fixed to the current-carrying busbar 1 by screws 4, the bottom of the heat sink 3 is in close contact with the surface of the current-carrying busbar 1, and a group of heat sinks 301 are vertically spaced on the heat sink 3, and the heat sinks 301 are perpendicular to the surface of the current-carrying busbar 1 to dissipate heat for the current-carrying busbar 1.

[0027] In this solution, a heat sink 3 is arranged on the current-carrying busbar 1, and a group of heat sinks 301 arranged vertically at intervals are used to increase the contact area with the air, so that the current-carrying busbar 1 can be quickly and timely dissipated. The local heat dissipation capacity of the connection between the current-carrying busbar 1 and the components 2 is improved, the heat dissipation efficiency is improved, the temperature of the connection between the two is reduced, and the safety and effectiveness of the connection are ensured.

[0028] Specific as Figure 3As shown, mounting holes 5 passing through the two ends of the heat sink 3 and the current-carrying busbar 1 are provided between the two ends, the screw 4 is inserted into the mounting holes 5, the head of the screw 4 abuts against the surface of the heat sink 3, and a limiting nut 6 is screwed on the bottom of the screw 4, and the heat sink 3 and the current-carrying busbar 1 are limited between the head of the screw 4 and the limiting nut 6.

[0029] In order to improve the contact stability between the screw 4 and the heat sink 3, a gasket 401 is provided between the head of the screw 4 and the surface of the heat sink 3, and the diameter of the gasket 401 is larger than the mounting hole 5. The gasket 401 is made of soft material.

[0030] Furthermore, the bottom of the limiting nut 6 is larger than the mounting hole 5, and the top thereof has a convex portion 601, the outer diameter of the convex portion 601 matches the inner diameter of the mounting hole 5, and when the limiting nut 6 is screwed with the screw 4, the convex portion 601 is clamped in the mounting hole 5. Such a structure enables the limiting nut 6 to be tightly fitted with the current-carrying busbar 1, thereby achieving the purpose of tightly fitting the heat sink 3 with the current-carrying busbar 1, improving the setting stability of the heat sink 3, and ensuring that the heat sink 3 and the current-carrying busbar 1 are tightly fitted to improve the effectiveness and efficiency of the heat conduction between the heat sink 3 and the current-carrying busbar 1.

[0031] like Figure 4 As shown, the outer peripheral wall of the protrusion 601 is tooth-shaped. The tooth-shaped structure of the protrusion 601 can facilitate the protrusion 601 to be inserted into the mounting hole 5 by rotation during the assembly process, so as to achieve the purpose of matching the protrusion 601 with the mounting hole 5.

[0032] In order to further improve the heat dissipation efficiency of the heat sink 3 on the current-carrying busbar 1, a heat-conducting layer is coated on the contact surface between the current-carrying busbar 1 and the heat sink 3. The heat-conducting layer is composed of a medium with a heat-conducting property to enhance the heat conduction between the heat sink 3 and the current-carrying busbar 1 and improve the heat dissipation efficiency.

[0033] The end of the component 2 has a waist-shaped hole 201, and the current-carrying busbar 1 is provided with a through hole 101 whose diameter matches the width of the waist-shaped hole 201. Bolts are inserted into the through hole 101 and the waist-shaped hole 201 to fix the current-carrying busbar 1 and the component 2. The waist-shaped hole 201 can facilitate the adjustment of the connection position between the component 2 and the current-carrying busbar 1.

[0034] Furthermore, waist-shaped holes 201 are symmetrically provided at both ends of the component 2 to facilitate the connection of the current-carrying busbar 1 .

[0035] In addition, the utility model also discloses a high-voltage distribution box, including a shell, and the high-current-carrying busbar as mentioned above which is easy to dissipate heat and is located therein.

[0036] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0037] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. High current carrying busbar with easy heat dissipation, characterized by: The invention comprises a current-carrying busbar (1) and a component (2) which are fixedly connected to each other. A heat sink (3) is fixedly arranged on the current-carrying busbar (1) by means of screws (4). The bottom of the heat sink (3) is in close contact with the surface of the current-carrying busbar (1). A group of heat sinks (301) are vertically arranged on the heat sink (3). The heat sinks (301) are perpendicular to the surface of the current-carrying busbar (1) so as to dissipate heat from the current-carrying busbar (1). A mounting hole (5) penetrating the two is arranged between the two ends of the heat sink (3) and the current-carrying busbar (1). The screw (4) is inserted into the mounting hole (5). The head of the screw (4) is in contact with the surface of the heat sink (3). A limiting nut (6) is screwed on the bottom of the screw (4). The heat sink (3) and the current-carrying busbar (1) are limited between the head of the screw (4) and the limiting nut (6).

2. The high current carrying busbar with easy heat dissipation according to claim 1 is characterized in that: A gasket (401) is provided between the head of the screw (4) and the surface of the heat sink (3), and the gasket (401) is larger than the mounting hole (5).

3. The high current carrying busbar with easy heat dissipation according to claim 2 is characterized in that: The bottom diameter of the limiting nut (6) is larger than the mounting hole (5), and the top of the limiting nut (6) is provided with a convex portion (601), the outer diameter of the convex portion (601) matches the inner diameter of the mounting hole (5), and when the limiting nut (6) is screwed to the screw (4), the convex portion (601) is clamped in the mounting hole (5).

4. The high current carrying busbar with easy heat dissipation according to claim 3 is characterized in that: The outer peripheral wall of the protrusion (601) is tooth-shaped.

5. The high current carrying busbar with easy heat dissipation according to claim 4, characterized in that: A heat-conducting layer is coated on the contact surface between the current-carrying busbar (1) and the heat sink (3).

6. The high current carrying busbar with easy heat dissipation according to claim 5, characterized in that: The end of the component (2) has a waist-shaped hole (201), the current-carrying busbar (1) is provided with a through hole (101) whose diameter matches the width of the waist-shaped hole (201), and bolts are inserted into the through hole (101) and the waist-shaped hole (201) so that the current-carrying busbar (1) and the component (2) are fixedly connected.

7. The high current carrying busbar with easy heat dissipation according to claim 6, characterized in that: The two ends of the component (2) are symmetrically provided with a waist-shaped hole (201).

8. A high voltage distribution box, characterized in that: The utility model comprises a shell and a high current-carrying busbar with easy heat dissipation as claimed in any one of claims 1 to 7 located therein.

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