CN204966731U - Multi -functional output terminal of charger heavy current - Google Patents

Abstract

The utility model provides a multi -functional output terminal of charger heavy current can give big electricity charging utensils family, provides the selection of plugging into of two kinds of batteries: with line ear snap -on to battery terminal, remove with the provisional battery terminal of plugging into of pliers when using during stationary use. The problem of " line ear + pliers " dual -purpose combination under the condition of heavy current, the line to tong arm binding site seriously generate heat and the pressure drop big is solved. Thereby avoid scalding one's hand, charging voltage is low and a series of problems such as vicious circle of " generate heat - end of a thread oxidation - pressure drop increase - generate heat the aggravation ".

Description

A high-current multifunctional output terminal of a charger

technical field

The utility model relates to a high-current multi-functional output terminal of a charger, in particular to a high-current multi-functional output terminal of a charger which can be fixedly used or moved.

Background technique

At present, there is also a dual-purpose combination of "wire ear + pliers" on the market, but due to the large internal resistance at the joint between the output wire tip and the pliers arm, it can only be used on a charger with a small current (<15Amp). If it is used in a high-current charger, a large current will cause heat and hot hands, low charging voltage, and a vicious cycle of "heat generation-thread oxidation-increased voltage drop-increased heat" will appear after long-term use, resulting in poor contact and even fire. and other serious consequences. So on some high-current (15-80A) chargers, either use the lugs directly or use the pliers directly.

Why is the internal resistance of the joint between the traditional output wire and the clamp arm large? The traditional method is direct stamping. Since the copper wire is cylindrical, after stamping, there will be a large number of voids between the copper wire and the inner wall of the wire tube. If the copper wire is scattered, the internal void The position will be multiplied. This kind of virtual position will lead to the reduction of the overall contact surface. The copper wire in the center of the wire harness will not be in good contact with the surrounding copper wires. The copper wire on the surface of the wire harness will not be in good contact with the inner wall of the wire tube. Very large, under the condition of high current, it will heat up seriously. The empty position between the copper wires provides favorable conditions for the air to enter the structure. In the case of heat, it is easy to cause oxidation of the copper wire and the inner wall of the wire tube. Oxidation will lead to an increase in the contact resistance. The actual measurement often shows several megohms Even greater resistance, the result is exacerbated heating, a vicious circle, eventually poor contact, and even a fire. It can be seen that the traditional structure not only generates a lot of heat, but is also very unstable.

Utility model content

The technical problem to be solved by the utility model is to provide a high-current multifunctional output terminal of a charger for the above-mentioned defects of the prior art.

The technical scheme that the utility model solves its technical problem adopts is:

Provide a charger with a large current multifunctional output terminal, including a wire lug structure that can be directly fixed on the battery terminal and a pliers structure that can be temporarily connected to the wire lug mechanism. The wire lug structure includes an output line and its The end copper wire and the wire lug, after the end copper wire is soaked with low-temperature solder paste, it is inserted into the wire tube at the end of the wire lug to be fixed, and the tail wire tube is locally heated; the pliers structure includes a pliers arm, a pliers The plastic shell and the wire lug connection structure arranged at the end of the pliers are used for temporarily fixing the wire lug structure.

Preferably, the copper wire is inserted into the wire tube at the tail of the wire lug by punching a punching hole on the wire tube, the purpose is to lock the copper wire and the wire lug to avoid accidental separation.

Preferably, the wire lug connection structure includes a brass nut and a plastic wire crimping buckle, which are used to fix the wire lug, so that the wire lug and the pliers are fixed as a whole, and can be disassembled and stored at any time during use.

Preferably, the brass nut is implanted into the end of the pliers arm by riveting, and spot-welded on the edge where the nut contacts the surface of the pliers arm. This "riveting + spot welding" structure provides sufficient support for the nut and the pliers arm. Excellent contact and reliable strength, avoiding the phenomenon of loosening and poor contact between the nut and the pliers arm caused by operating torque and thermal stress.

Preferably, the brass nut is a non-chamfered flat nut, which provides a sufficient contact surface for the installation of the wire lug, and reduces the contact resistance as much as possible.

A multi-function output terminal with high current for a charger. The beneficial effect of the utility model is: by effectively reducing the resistance between the wire lug and the copper wire, the heat generated during high current charging is further reduced, thereby providing high current charging. Two charging methods, fixed charging and mobile charging, are available for customers to choose freely, which improves the safety of high-current charging, is convenient for customers to use, and avoids hot hands, low charging voltage and "heating-thread oxidation-voltage drop increase- A series of problems such as the vicious circle of exacerbation of fever.

Description of drawings

The utility model will be further described below in conjunction with accompanying drawing and embodiment:

Figure 1 Schematic diagram of the high-current charger output line directly connected to the battery terminal through the wire lug

Figure 2 Schematic diagram of connecting the output line of the high-current charger to the battery terminal through the "wire lug + pliers"

Figure 3 Schematic diagram of the connection between the wire lug and the output line

Figure 4 Schematic diagram of the connection between the clamp arm and the nut

Figure 5 Schematic diagram of the connection between the wire lug and the pliers

Figure 6 The schematic diagram of the finished product after the wire lug and the pliers are assembled

In the figure, 1. Charger DC output wire 2. Copper wire lug 3. Wire lug punching port 4. Soldering tin material 5. Copper wire at the end of the output wire 6. Flat brass nut 7. Nut welding point 8. Nut riveting structure 9. Pliers arm 10. Plastic crimping buckle 11. PC pliers plastic shell 12. Screw 13. Spring washer 14. Output line fixing buckle

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.

Figure 1 is a schematic diagram of a high-current charger output line directly connected to a battery terminal through a wire lug, that is, a schematic diagram of a state during fixed charging.

Figure 2. The schematic diagram of the output line of the high-current charger connected to the battery terminal through the "cable lug + pliers", which is the schematic diagram of the state during mobile charging. It is easy to plug and unplug and can be stored at any time.

In the embodiment shown in Fig. 3, after the copper wire 5 at the end of the charger output line 1 is dipped in a low-temperature solder paste with a melting point of 150°C, it is inserted into the wire tube at the end of the wire lug 2, and a punching hole 3 is punched out on the wire tube to lock the copper wire. Silk and wire ears. Then use an infrared local heating device to heat the wire tube to about 160°C, so that the solder can fully fuse the copper wire and the inner wall of the wire tube. Filling with a small amount of low-temperature solder paste not only blocks the air from entering, but also connects the copper wire tube into one, which skillfully solves the problems of scattered copper wire and poor contact between the copper wire and the inside of the wire tube.

In the embodiment of FIG. 4 , a 6.5 mm thick M8 brass nut 6 is riveted into the end of the pliers arm 9 and reinforced by spot welding at the contact edge between the nut and the pliers arm. This "riveting + spot welding" structure provides sufficient contact and reliable strength for the nut and the pliers arm, avoiding the phenomenon of loosening and poor contact between the nut and the pliers arm caused by operating torque and thermal stress. Moreover, the nut used is the hexagonal plane of the M8 large nut, which provides enough contact surface for the installation with the wire lug.

In the embodiment shown in Fig. 5, the wire lug (2) and the M8 nut (6) are locked together by the M8 screw (12) and the M8 spring washer (13), and then press the plastic crimping buckle (14) into the clamp arm ( 2), the charging output line (1) can be fixed to complete the connection between the wire ear and the pliers, making them a movable whole of "wire ear + pliers", which is convenient for customers to choose.

The utility model can provide users of high-current chargers (15-80A) with two battery connection options: use wire lugs to directly fix to battery terminals when in fixed use, and temporarily connect battery terminals with pliers when in mobile use. It solves the problem of severe heat generation and large voltage drop at the junction of the wire and the pliers arm under the condition of high current in the "wire ear + pliers" dual-purpose combination. In this way, a series of problems such as hot hands, low charging voltage and the vicious cycle of "heating-thread oxidation-increased voltage drop-increased heating" are avoided, ensuring the safety of high-current charging and improving the utilization rate of electric energy.

As mentioned above, it is only the specific implementation mode of the fixture of the present utility model, and it cannot be used as a limit to the specific implementation scope of the present utility model. All changes and modifications made according to the claims and description of the utility model are under the protection of the utility model. within range.

Claims (5)

1. the multi-functional lead-out terminal of charger big current, is characterized in that: the clamp structure including line ear structure and the line ear mechanism of can provisionally plugging into that can directly be fixed on battery terminal,

Described line ear structure includes output line (1) and end copper wire (5) thereof and line ear (2), described end copper wire is fixed in line ear (2) afterbody spool, and described end copper wire (5) is coated with tin cream;

Described clamp structure includes tong arm (9), pliers plastic shell (11) and is arranged on the line ear-pole connection structure of tong arm (9) end for provisional static line ear structure.

2. the multi-functional lead-out terminal of a kind of charger big current according to claim 1, is further characterized in that: described copper wire (5) stretches into the affixed mode of line ear (2) afterbody spool for extruding punching press mouth (3) in spool upper punch.

3. the multi-functional lead-out terminal of a kind of charger big current according to claim 1, is further characterized in that: described line ear-pole connection structure includes brass nut (6) and plastic cement Line pressing buckle (14).

4. the multi-functional lead-out terminal of a kind of charger big current according to claim 3, be further characterized in that: described brass nut (6) implants tong arm (9) end by the mode of riveting, and at nut in the edge spot welding of tong arm surface contact.

5. the multi-functional lead-out terminal of a kind of charger big current according to claim 3, is further characterized in that: described brass nut (6) is non-chamfer plane nut.