阅读说明：本技术 防止充电口导电接触面松旷的方法 (Method for preventing conductive contact surface of charging port from loosening ) 是由 胡定灏 于 2021-09-09 设计创作，主要内容包括：防止充电口导电接触面松旷的方法是指充电口的导电管有活动结构,活动结构是被弹簧片箍住或其自带握紧力,使其内孔直径在空置时小于需插入的导电针的外径。当导电针插入时,克服弹簧片的作用力使活动结构向外扩张,导电针顺利进入指定位置后,活动结构的导电接触面与导电针的接触面在弹簧力的作用下紧密结合,实现电路的导通。(The method for preventing the conductive contact surface of the charging port from loosening refers to that a conductive tube of the charging port has a movable structure, and the movable structure is hooped by a spring piece or has a holding force, so that the diameter of an inner hole of the movable structure is smaller than the outer diameter of a conductive needle to be inserted when the movable structure is empty. When the conductive needle is inserted, the movable structure is expanded outwards by overcoming the acting force of the spring piece, and after the conductive needle smoothly enters the designated position, the conductive contact surface of the movable structure and the contact surface of the conductive needle are tightly combined under the action of the spring force, so that the circuit is switched on.)

1. A method for preventing the conductive contact surface of a charging port from loosening is characterized in that a jack of the charging port is provided with a movable structure, and the movable structure and a conductive needle form a conduction circuit.

2. A method for preventing a conductive contact surface of a charging port from loosening is characterized in that a spring hoops a movable structure, and when a conductive needle is not inserted, the inner diameter of the movable structure is smaller than the outer diameter of the conductive needle.

3. A method for preventing the conductive contact surface of charging port from loosening features that the movable structure is composed of multiple conductors swinging inwards and outwards.

4. A method for preventing a conductive contact surface of a charging port from loosening is characterized by being suitable for a charging system of a power battery pack and an energy storage battery pack and a pin type connector for passing large current in a new energy automobile.

5. The method for preventing the conductive contact surface of the charging port from loosening is characterized in that: the head end of the movable structure is provided with a horn-shaped leading-in structure, the rear end of the movable structure is fixed on the conductive seat, and the conductive seat is conducted with the load through a wire.

6. The method for preventing the conductive contact surface of the charging port from loosening is characterized in that: the conductive movable structure contacted with the conductive needle is composed of a metal sheet with a gripping force.

Technical Field

A method for preventing a conductive contact surface of a charging port from being loose relates to a charging system of a new energy automobile, in particular to the field of structures of vehicle-mounted interface ends.

Background

The charging port of the new energy automobile is used as a power receiving end, and the conductive terminal of the new energy automobile is of a tubular structure. The charging gun end is used as a power supply end, and the conductive terminal is in a needle structure. When the action of charging takes place, the conducting pin of rifle that charges inserts the conducting tube of on-vehicle receiving end, realizes switching on of circuit through the contact of needle and pipe to the purpose that realizes charging. In real life, the charging action is frequently carried out, and the abrasion between the conductive needle and the conductive tube causes the gap to appear on the joint surface between the conductive needle and the conductive tube, so that the conductive surface can not be completely jointed, and the gap appears. These loose edges can produce electrical arcing (electrical sparks) when current passes through the conductive contact surface, thereby ablating the conductive contact surface. And because the clearance makes the electrically conductive area of conducting pin and electric tube reduce, can produce heat when the electric current passes through, the heat that produces can make the plastics structural component of charging mouth damage, and arouse bigger loss.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides a method for preventing a conductive contact surface of a charging port from loosening, which can realize that the conductive contact surfaces of a charging gun conductive needle and a vehicle-mounted charging port current-receiving tube can be tightly combined under the condition of serious abrasion. The contact resistance between the two is reduced, the current passing performance is kept in a good state, and corresponding faults caused by loose heat are reduced. The invention relates to a vehicle-mounted power receiving end, which is characterized in that a conductive tube at a vehicle-mounted power receiving end is changed into a movable structure capable of realizing contraction and expansion from a fixed tube structure in the prior art, the movable structure is a tube structure with a bell mouth, the bell mouth at the front end is a guide opening for inserting a conductive needle, a tube type contact conductive part is arranged below the guide opening, and the inner side of the tube type contact conductive part and the outer side of the conductive needle are contact surfaces of the tube type contact conductive part and the conductive needle. The contact conductive portion is a portion for connection conduction. The pipe body of the tubular contact conductive part and the bell mouth is provided with a plurality of longitudinal openings along the pipe body, and the outer diameter and the inner diameter of the contact conductive part and the bell mouth can be changed under the action of external force due to the openings. And C-shaped spring pieces are arranged outside the tube body of the tubular contact conductive part, and the inner diameter and the outer diameter of the contact conductive part and the bell mouth are reduced by the acting force of the spring pieces. When the conductive pin is inserted into the bell mouth and contacts the conductive part, the inserted external force is larger than the cohesive force of the spring piece. The inner side of the tubular contact part is tightly combined with the outer side of the conductive pin by the tension of the spring piece. Therefore, the conductive contact surfaces of the two can be tightly combined in the scene after being worn.

Preferably, the structure of the power transmission conductive pin of the existing charging gun is not changed, and only the structure of the power receiving end pipe body is changed. Preferably, the length of the opening from the bell mouth to the conductive portion of the power receiving contact is longer than the length of the conductive pin. Preferably, the acting surface of the C-shaped spring piece is wrapped on the outer surface of the conductive part for receiving the electric contact, and when the conductive pin is not inserted, the inner diameter of the conductive part for receiving the electric contact is smaller than the outer diameter of the conductive pin under the action of the spring force.

Detailed Description

The power transmission conducting pin of the new energy automobile direct current charging gun mostly adopts a metal conductor with the diameter of 10mm, the head of the conducting pin is provided with a limit device with the thrust function, and the limit device is a conical insulator with the guide-in function. The power receiving terminal of the vehicle-mounted charging port is a tubular conductor inserted into the end, the depth of the contact part of the power receiving terminal and the tubular conductor is 35-40 mm, and the power receiving terminal and the tubular conductor are in contact conduction by the vertical plane rather than the cross section.

Example 1

A copper pipe with the outer diameter of 12mm, the inner diameter of 10mm and the length of 70mm is taken, one end of the copper pipe is provided with a horn mouth with the height of 2mm by using a mouth expander, and the other end of the copper pipe is used as a connecting terminal for connecting an electric load. And 8 openings with the width of 0.5mm and the length of 45mm, which are longitudinally cut according to the circumference of the copper pipe on the pipe wall, are cut by laser from the top end of the bell mouth to the position of 45mm of the copper pipe. The claw-shaped copper tube with the opening has a movable structure that the claw-shaped tube wall contracts inwards and expands outwards under the action of external force. The outer surface of the movable structure is hooped by a C-shaped spring piece, so that the inner diameter of the movable structure is contracted to 9.5 mm. When a 10mm conductive needle enters the bell mouth through the lead-in cone, the inserted force is greater than the cohesive force of the C-shaped spring piece, the inner hole of the movable structure expands outwards to be larger, the conductive needle smoothly enters the limited position, and the movable structure is tightly combined with the conductive needle under the acting force of the C-shaped spring piece. When the conductive pin is drawn out, the inner hole of the movable structure is reduced under the action of the C-shaped spring piece.

The above embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.