Horizontal shunt special for charging pile

Abstract

The utility model provides a special horizontal shunt for a charging pile, which comprises two side guide pieces and a plurality of insertion pieces, and the plurality of insertion pieces are sequentially arranged in parallel and are fixedly connected with the two side guide pieces. A plurality of inserting grooves are formed in the end face of the guide piece, the width of each inserting groove can only contain a single inserting piece to stretch in, the cross section of each inserting groove in the length direction is in an inferior arc shape, the two ends of each inserting groove in the length direction end on the end face of the guide piece, the inserting grooves correspond to the inserting pieces in a one-to-one mode, and the inserting pieces stretch into the corresponding inserting grooves. And the insertion sheets and the corresponding guide pieces are welded and fixed. The cross section of the slot in the length direction of the slot is in the inferior arc shape, and compared with a through groove (or a notch in other shapes) formed in the end face of the guide piece, the horizontal shunt special for the charging pile has the advantages that welding flux is not prone to overflowing, redundant welding flux adhering to the guide piece or the insertion piece is reduced, and a datum plane is found rapidly.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle charging, in particular to a special horizontal shunt for charging piles. Background Technique

[0002] With the popularization of new energy vehicles, as the main charging equipment for electric vehicles, the performance stability and safety requirements of charging piles are getting higher and higher. When a charging pile is working, it needs to bear a large current and voltage. Therefore, the electrical components inside it, especially the components used for current shunting, need to have good electrical conductivity and heat dissipation performance. The structure of a shunt generally includes two side guides and a plurality of inserts. The plurality of inserts are arranged in parallel in sequence and are welded and fixed to the two side guides. The shunts used on existing charging piles have the following disadvantages:

[0003] 1) When the guide of the existing shunt is welded to the insert, it is easy to cause solder overflow, and subsequent secondary processing and trimming are required;

[0004] 2) Excess solder adheres to the guide or insert, resulting in unstable temperature drift of the shunt during use and affecting the sampling accuracy;

[0005] 3) When the guide and the insert are matched, it is difficult to find a reference plane, which affects the subsequent welding process.

[0006] The utility model with the application number CN202020564767.8 relates to the technical field of shunts, and particularly relates to a high-precision hollow horizontal shunt for new energy vehicles, including a manganin resistor body. Current input copper bars are connected to both ends of the manganin resistor body. A current sampling hole is preset on the current input copper bar near the manganin resistor body. A trimming center hole with a preset size is punched at the center position of the manganin resistor body. In this shunt, the current input copper bar and the manganin resistor body are welded by electron beam welding, the welding is more firm, smooth and more environmentally friendly. At the same time, the use of the manganin resistor body ensures that the resistance value of the shunt itself changes little when affected by high temperature impact. And by setting a trimming center hole in the manganin resistor body, the resistance can be about 1 time larger than that of other shunts of the same volume. When used for high-current loads, by adjusting the size of the trimming center hole, the partial area of the manganin resistor body is reduced, the transfer of the center temperature of the resistor body is accelerated, and the generated heat is transferred to both ends more quickly, so that the heat dissipation effect of the shunt is better.

[0007] However, the above patent technology is not applicable to high-current environments such as charging piles, and it does not solve the problems existing in the prior art. Content of the Utility Model

[0008] The purpose of the utility model is to provide a special horizontal shunt for charging piles to solve the problems raised in the above background technique:

[0009] 1), How to improve the mating structure of the guide and the insert piece to reduce the solder overflow during welding and reduce the adhesion of excess solder to the guide or the insert piece;

[0010] 2), How to quickly find the reference plane when the guide and the insert piece are mated to complete the subsequent welding process.

[0011] To achieve the above object, the present utility model provides the following technical solutions:

[0012] A horizontal shunt for a charging pile, comprising two side guides and a plurality of insert pieces, the plurality of insert pieces are arranged in parallel in sequence and fixedly connected to the two side guides;

[0013] A plurality of slots are formed on the end surface of the guide, the width of the slot can only accommodate a single insert piece to extend in, the cross-sectional shape of the slot along its length direction is a minor arc bow shape, both ends of the slot in the length direction terminate at the end surface of the guide, the plurality of slots correspond to the plurality of insert pieces one by one, the insert piece extends into the corresponding slot, and the insert piece is fixedly connected to the corresponding guide by welding.

[0014] Based on the above technical solutions, the present utility model can also be improved as follows.

[0015] Further, the cross-sectional graphics of both ends of the insert piece are respectively minor arc bow shapes that match the corresponding slots.

[0016] Further, the guide is made of brass.

[0017] Further, the insert piece is made of manganin.

[0018] Further, the insert piece is provided with a resistance adjustment slot.

[0019] Through the above design, the horizontal shunt for a charging pile of the present utility model has the following advantages:

[0020] 1), After the insert piece of the horizontal shunt for a charging pile extends into the slot of the guide, it is first crimped and then fixedly connected by welding. Compared with the existing shunt, it is not easy to cause solder overflow and reduces the need for subsequent secondary processing and trimming;

[0021] 2), The slot is designed with a minor arc bow shape, which increases the contact area between the insert piece and the slot, improves the current shunting effect and heat dissipation performance; moreover, this structure can reduce the adhesion of excess solder to the guide or the insert piece, reduce the influence on the temperature drift of the shunt, and ensure the sampling accuracy;

[0022] 3), When the slot of the guide is mated with the insert piece, the insert piece can quickly find the reference plane, which is convenient for the subsequent welding process.

[0023] 4), The insert piece and the guide are fixedly connected by welding, and the connection is stable and reliable, ensuring the long-term stable operation of the shunt.

[0024] In addition, the cross-sectional shape of the slot along its length direction in the special horizontal shunt for the charging pile is a minor arc bow shape. Compared with opening a through slot (or other shaped notches) on the end face of the guide part, it has the advantages of not easily causing solder overflow, reducing the adhesion of excess solder to the guide part or the insertion piece, and quickly finding the reference plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a top view of an embodiment of the special horizontal shunt for the charging pile.

[0026] Figure 2 is a perspective view of the guide part in an embodiment of the special horizontal shunt for the charging pile.

[0027] Figure 3 is a top view of the guide part in an embodiment of the special horizontal shunt for the charging pile.

[0028] Figure 4 is a sectional view taken along the A-A direction.

[0029] Description of the reference numerals in the drawings:

[0030] Guide part - 100; Slot - 110; Insertion piece - 200; Resistance adjustment slot - 210. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following detailed description of the specific embodiments of the present utility model will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0032] The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only and do not represent the only embodiment.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] Please refer to Figures 1 to 4 .

[0035] The special horizontal shunt for this charging pile includes two side guides 100 and three inserts 200. The three inserts 200 are arranged in parallel in sequence and fixedly connected to the two side guides 100.

[0036] The guide 100 is made of brass. Three slots 110 are opened on the end face of the guide 100. The width of the slot 110 can only accommodate a single insert 200 to extend in. The cross-sectional shape of the slot 110 along its length direction is a minor arc bow shape, and both ends of the slot 110 in the length direction terminate at the end face of the guide 100.

[0037] The three slots 110 correspond to the three inserts 200 one by one. The insert 200 is made of manganin. The cross-sectional shapes of both ends of the insert 200 are respectively minor arc bow shapes that match the corresponding slots 110. The end of the insert 200 extends into the corresponding slot 110. The insert 200 is fixedly connected to the corresponding guide 100 by welding, and the insert 200 is provided with a resistance adjustment slot 210.

[0038] After welding is completed, necessary electrical performance tests and safety inspections are carried out to ensure that the performance of the shunt meets the requirements.

[0039] Through the above specific implementation manners, a special horizontal shunt for a charging pile with excellent current shunting effect and heat dissipation performance can be prepared, providing a stable and reliable guarantee for the charging of electric vehicles.

[0040] In addition, according to the current and voltage requirements of the charging pile, the number and size of the inserts 200 can be determined. The insert 200 is made of a metal material with good electrical conductivity, such as copper or copper alloy. The guide 100 is also made of a metal material with good electrical conductivity and is connected to the circuit system inside the charging pile.

[0041] The above is only one implementation manner of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several variations and improvements can also be made, and these should also be regarded as belonging to the protection scope of the present utility model.

Claims

1. A horizontal current divider for a charging pile, comprising two side guides (100) and a plurality of inserts (200), wherein the plurality of inserts (200) are arranged in parallel and fixedly connected to the two side guides (100), and wherein: A plurality of slots (110) are provided on the end surface of the guide member (100); the width of the slots (110) can only accommodate a single insert (200) to be inserted therein; the cross-sectional shape of the slots (110) along the length direction thereof is a minor arc; both ends of the slots (110) in the length direction terminate at the end surface of the guide member (100); the plurality of slots (110) correspond to the plurality of inserts (200) in a one-to-one manner; the inserts (200) are inserted into corresponding slots (110); and the inserts (200) are fixed to the corresponding guide member (100) by welding.

2. The horizontal shunt for charging pile according to claim 1 is characterized in that: The cross-sectional shapes of the two side ends of the insert (200) are respectively in the shape of a minor arc that matches the corresponding slot (110).

3. The horizontal shunt for charging pile according to claim 1 is characterized in that: The guide member (100) is made of brass.

4. The horizontal shunt for charging pile according to claim 1 is characterized in that: The insert (200) is made of manganese copper.

5. The horizontal shunt for charging pile according to claim 1 is characterized by: The insert (200) is provided with a resistance adjustment slot (210).

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