CN115842253A - Piston type electric connecting device based on low-melting-point metal - Google Patents
Piston type electric connecting device based on low-melting-point metal Download PDFInfo
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- CN115842253A CN115842253A CN202111103046.2A CN202111103046A CN115842253A CN 115842253 A CN115842253 A CN 115842253A CN 202111103046 A CN202111103046 A CN 202111103046A CN 115842253 A CN115842253 A CN 115842253A
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Abstract
The invention provides a piston type electrical connection device based on low-melting-point metal, which comprises a low-melting-point metal sealed cavity, a negative pressure imbibing component and a liquid guide port which are arranged on the low-melting-point metal sealed cavity, and at least two conductive connection ends communicated with the interior of the low-melting-point metal sealed cavity. When a conductive path needs to be formed, liquid low-melting-point metal is sucked into the low-melting-point metal sealing cavity from the liquid guide port through the negative pressure liquid suction assembly so as to communicate the conductive connecting end; when the conductive path needs to be disconnected, the liquid low-melting-point metal is extruded out of the low-melting-point metal sealed cavity through the negative pressure liquid suction assembly. According to the invention, the liquid metal is connected with the plug, so that the contact resistance between the plug and the socket can be completely eliminated, and no stress is generated during insertion; through the piston type liquid guide structure, the molten metal can be guided in and out, the liquid metal is prevented from leaking, the replacement and the maintenance are convenient, and the stress generated by the low-melting-point metal in the expansion-contraction process can be released.
Description
Technical Field
The invention relates to the technical field of electrical connection, in particular to a piston type electrical connection device based on low-melting-point metal.
Background
Electrical connectors are widely used in the fields of integrated circuits, electric vehicles, and the like as important connecting parts in electrical systems. Current electrical connectors are primarily mechanically connected using a socket and plug. The contact resistance between the plug and the socket depends on the positive pressure and the contact area on the contact surface, and after multiple plugging and unplugging, the elastic sheet of the socket is elastically reduced or slightly plastically deformed to generate the positive pressure reduction, so that the contact resistance is increased or even broken. On the other hand, the socket and the plug are mainly made of surface nickel-plated copper or tin-plated copper, and after long-term use, the inner layer copper diffuses toward the surface of the plating layer, and the copper diffused to the surface is easily oxidized by air to form copper oxide attachments with poor conductivity, which causes the contact resistance between the socket and the plug to sharply increase. If the contact resistance between the receptacle and plug is too high, a significant amount of heat may be generated after the current is applied, resulting in thermal failure of the connector and even burning. And because the socket and the plug are in mechanical connection, when the socket and the plug are greatly vibrated or collided, the plug and the socket have the possibility of being instantaneously loosened, so that a local loop is broken.
In view of the above, there is a need for an improved low melting point metal based piston electrical connection device to solve the above problems.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a piston type electrical connecting device based on low-melting-point metal, which can completely eliminate contact resistance between a plug and a socket by using liquid metal to connect with the plug, and has no stress generation during insertion; through piston drain structure, can lead in the guiding out of molten metal, prevent that liquid metal from revealing, also be convenient for change the maintenance.
In order to achieve the purpose, the invention provides a piston type electrical connection device based on low-melting-point metal, which comprises a low-melting-point metal sealed cavity, a negative-pressure imbibing component and a liquid guide port which are arranged on the low-melting-point metal sealed cavity, and at least two conductive connection ends communicated with the interior of the low-melting-point metal sealed cavity;
when a conductive path needs to be formed, liquid low-melting-point metal is sucked into the low-melting-point metal sealed cavity from the liquid guide port through the negative pressure liquid suction assembly so as to communicate the conductive connecting end;
when the conductive path needs to be disconnected, the liquid low-melting-point metal is extruded out of the low-melting-point metal sealed cavity through the negative pressure liquid suction assembly.
As a further improvement of the invention, the negative pressure suction assembly is a piston type negative pressure suction assembly.
As a further improvement of the invention, the piston type negative pressure liquid suction assembly comprises a piston head arranged in the low melting point metal sealed cavity and a push rod connected with the piston head.
As a further improvement of the invention, a limiting pin is arranged in the low-melting-point metal sealing cavity and used for limiting the outward displacement of the piston head.
As a further improvement of the invention, the low melting point metal sealing cavity is of a cylindrical structure.
As a further improvement of the invention, the piston head is provided with a through hole communicated with the low-melting-point metal sealing cavity and used for fixedly or detachably connecting one or more conductive connecting ends.
As a further improvement of the invention, the inner wall of the piston head and the inner wall of the low-melting-point metal sealing cavity on the side adjacent to the piston head are inclined inner walls.
As a further improvement of the invention, at least one conductive connecting end is detachably connected with the low-melting-point metal sealing cavity, and a sealing valve is arranged at the interface of the low-melting-point metal sealing cavity and the detachably connected conductive connecting end.
As a further improvement of the invention, the front end of the detachably connected conductive connecting end is conical, and the inner wall of the negative pressure liquid absorbing component facing the low melting point metal sealing cavity is provided with a conical groove for accommodating the detachably connected conductive connecting end.
As a further improvement of the present invention, the low melting point conductive metal includes but is not limited to one or more of mercury, gallium-based alloy, sodium-potassium alloy, bismuth-based alloy.
The invention has the beneficial effects that:
1. the piston type electric connecting device based on the low-melting-point metal realizes the injection or discharge of the liquid low-melting-point metal through the liquid absorption or extrusion effect of the negative pressure liquid absorption assembly, can ensure that the sealing cavity of the low-melting-point metal is always in a sealed environment, and can avoid the increase of internal resistance caused by the oxidation of a plug in the cavity. If the metal in the cavity is in a liquid state for a long time during working, the stress generated by vibration can be released.
2. The invention realizes the control of conduction and power-off by injecting or discharging the liquid low-melting-point metal, and can avoid repeatedly plugging and unplugging the conductive connecting end so as to reduce the problem of short service life caused by repeated plugging and unplugging. And realize conductive connection through liquid metal, on the one hand can eliminate the contact resistance between plug and the socket completely, and no stress produces during the insertion, but on the other hand low melting point metal whole discharge, and individual storage can prevent off-working condition time, liquid low melting point metal's the revealing, is convenient for change and maintenance moreover. Further, since the piston structure can be moved in the cylinder axial direction, the stress generated in the expansion-contraction process of the low melting point metal can be released.
3. The invention can realize double power-off by arranging the detachable conductive connecting end, and is convenient to detach and overhaul. The inner end face of the piston and the inner end face of the valve are provided with inclined liquid guide groove structures, so that all liquid low-melting-point metal can be discharged from the liquid guide hole. The front end of the detachable conductive connecting end is conical, and the inner opening of the valve is also conical, so that the plug can be inserted into the correct position, and the conductive connecting end is prevented from being inserted too deeply. The inner wall of the piston is provided with a groove with the same shape as the end part of the conductive connecting end, so that no redundant space is reserved between the piston and the conductive connecting end when the piston is pushed back, and liquid low-melting-point metal can be completely discharged.
Drawings
Fig. 1 is a schematic structural diagram of a low-melting-point metal-based piston-type electrical connection device according to the present invention.
Fig. 2 is a structural diagram of the piston type electric connection device based on the low melting point metal in an open state.
Fig. 3 is a schematic structural view of the low melting point metal-based piston-type electrical connector of the present invention inserted with a plug, without injecting liquid low melting point metal.
Fig. 4 is a schematic view of the conducting state structure of the low melting point metal-based piston type electrical connection device of the present invention.
Fig. 5 is a schematic structural diagram of the low-melting-point metal-based piston type electrical connection device with a heater.
Reference numerals
10-low melting point metal sealing cavity; 11-a liquid guide port; 12-a sealing valve; 13-a negative pressure pipetting assembly; 130-a piston head; 131-a push rod; 132-a spacing pin; 133-grooves; 20-a first conductive connection end; 21-a second conductive connection; 30-a temperature regulating assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in detail below with reference to specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme of the present invention are shown in the specific embodiments, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Referring to fig. 1 to 5, the piston-type electrical connection device based on low-melting-point metal provided by the present invention includes a low-melting-point metal sealed cavity 10, a negative pressure wicking component 13 and a liquid guiding port 11 disposed on the low-melting-point metal sealed cavity 10, and at least two conductive connection terminals (e.g., a first conductive connection terminal 20 and a second conductive connection terminal 21 in fig. 1) communicating with the interior of the low-melting-point metal sealed cavity 10. When a conductive path needs to be formed, liquid low-melting-point metal is sucked into the low-melting-point metal sealed cavity 10 from the liquid guide port 11 through the negative pressure liquid suction assembly 13 so as to communicate the conductive connecting end; when the conductive path needs to be disconnected, liquid low-melting-point metal is extruded from the low-melting-point metal sealed cavity 10 through the negative pressure liquid suction assembly.
So set up, imbibition or extrusion effect through negative pressure imbibition subassembly 13 realize the injection or the discharge of liquid low melting point metal, can guarantee to be in sealed environment all the time in the sealed chamber 10 of low melting point metal, can avoid the plug to be oxidized in the cavity and lead to the rising of internal resistance. The control of conducting and cutting off the power supply is realized through the injection or the discharge of the liquid low-melting-point metal, on one hand, the contact resistance between the plug and the socket can be completely eliminated, no stress is generated during the insertion, on the other hand, the leakage of the liquid low-melting-point metal can be prevented during the non-working state, and the replacement and the maintenance are convenient.
Moreover, because the control of conducting and cutting off the power supply can be realized through the injection and the discharge of the liquid metal, the conducting connecting end can be inserted and pulled repeatedly, so that the problem of short service life caused by repeated insertion and pulling is solved. In this case, when the liquid low-melting-point metal is completely discharged, the end of each conductive connection terminal should be in a non-contact state to prevent failure of power failure; and in order to discharge the liquid low melting point metal completely, the end of the conductive connection terminal should be flush with the inner wall of the low melting point metal sealed chamber 10. For example, in fig. 1, the first conductive connection terminal 20 and the second conductive connection terminal 21 are disposed to be offset from each other, but both should be in contact with the liquid low melting point metal when the liquid low melting point metal is injected to form a conductive path.
In particular, the vacuum assembly 12 is a piston vacuum assembly comprising a piston head 130 disposed within the refractory metal chamber 10 and a pushrod 131 attached to the piston head 130, the pushrod 131 having a diameter smaller than the diameter of the piston head 130. The piston head 130 is tightly fitted with the inner wall of the low melting point metal sealed cavity 10 to realize high-efficiency negative pressure liquid suction or discharge. The low melting point metal capsule 10 is preferably of cylindrical construction.
In some embodiments, a limiting pin 132 is further disposed in the low melting point metal sealed cavity 10 for limiting the outward displacement of the piston head 130 to control the injection amount of the liquid low melting point metal.
Specifically, in some embodiments, the piston head 130 is provided with a through hole in communication with the low melting point metal sealed cavity 10 for fixedly or detachably connecting one or more conductive connection terminals thereof. For example, the first conductive connection 20 in fig. 1 is connected to the low melting point metal sealed chamber 10 through the pushrod 131 and the piston head 130. Except for the conductive connection terminals, the components should be made of insulating material to prevent short circuit or leakage.
In other embodiments, the inner wall of the piston head 130 and the inner wall of the low melting point metal sealed cavity 10 adjacent to the piston head are both inclined inner walls, the liquid guiding port 11 is disposed at the end of the low melting point metal sealed cavity 10, and the liquid low melting point metal is discharged from the liquid guiding port 11 by the continuous extrusion of the piston head 130. So set up, be favorable to liquid low melting point metal not have the surplus whole discharge.
The melting point of the low-melting conductive metal is preferably-40 to 200 ℃. The low melting point conductive metal includes, but is not limited to, one or more of mercury (melting point-39 ℃), gallium (melting point 29.76 ℃), gallium-based alloys, sodium potassium alloys (100 ℃, (K78%, na 22%); 100 ℃, (K56%, na 44%); 11 ℃, (K78%, na 22%); 19 ℃, (K56%, na 44%)), bismuth-based alloys (e.g., tin bismuth alloy melting point 138 ℃).
Specifically, referring to fig. 5, the electrical connection device of the present invention further includes a temperature adjustment assembly 30 disposed at the periphery of the low-melting-point metal sealing cavity 10 for adjusting the temperature of the low-melting-point conductive metal, and further adjusting the physical form (solid phase or liquid phase) of the low-melting-point conductive metal. The switch for controlling the conduction of the temperature adjusting assembly 30 can be a mechanical switch, and a wireless control module can also be arranged in the switch, so that the heating device can be conveniently controlled to be conducted in batches, and the switch is suitable for the plugging and unplugging requirements of a large-batch connecting mechanism.
In some embodiments, the temperature regulating assembly 30 includes a heating assembly; when liquid drainage is required, if the low melting point conductive metal is in a solid state, the low melting point conductive metal is heated by the heating element to be transformed into a liquid state, and then is extruded through the piston head 30. This should ensure that the melting temperature of the low melting point conductive metal is lower than the melting temperature of the conductive connection end, preferably 100 ℃ or higher, to prevent the conductive connection end from melting itself when it is inserted into the molten liquid low melting point conductive metal.
In some embodiments, the temperature regulating assembly 20 further comprises a temperature reducing assembly; when the low-melting-point conductive metal is injected into the low-melting-point metal sealing cavity 10, the cooling component cools the low-melting-point conductive metal to enable the low-melting-point conductive metal to be converted into a solid state; or the heat generated by the electric connecting device in the conductive working process is cooled and dissipated.
Example 2
Compared with embodiment 1, the piston type electric connecting device based on the low-melting-point metal is different in that at least one conductive connecting end is detachably connected with a low-melting-point metal sealing cavity 10, such as a second conductive connecting end 21 in fig. 1-5, and a sealing valve 12 is arranged at the interface of the low-melting-point metal sealing cavity 10 and the detachably connected conductive connecting end.
Specifically, the front end of the detachably connected conductive connection terminal is tapered, and the inner wall of the negative pressure pipette assembly 13 facing the low melting point metal sealed chamber 10 is provided with a tapered recess 133 for accommodating the detachably connected conductive connection terminal. With this arrangement, it is possible to ensure that the second conductive connecting terminal 21 is inserted into the correct position and prevent the insertion from being too deep, and it is also possible to ensure that the piston head 130 has no extra space for the second conductive connecting terminal 21 when pushed back, and the liquid low melting point metal can be completely discharged.
Referring to fig. 2, the power-off state is shown, that is, the liquid low-melting-point metal is completely discharged, and the second conductive connection terminal 21 is pulled out from the low-melting-point metal sealed cavity 10, so that the double power-off is realized, and the replacement and maintenance of the conductive connection terminal are facilitated.
Referring to fig. 2-4, when it is desired to form the conductive path, the second conductive connection terminal 21 is first inserted into the tapered recess 133 through the sealing valve 12 at the end of the low melting point metal sealing chamber 10, and the valve 12 is sealed by a bolt. The low-melting-point metal is then melted, and the liquid low-melting-point metal is sucked into the hollow low-melting-point metal sealed chamber 10 from the liquid guide port 11 by the piston head 130, as shown in fig. 4. The other end of the piston head 30 is connected to the first conductive connection terminal 20. At this time, the current is conducted through the first conductive connection terminal 20 → the low melting point metal → the piston head 130 → the second conductive connection terminal 21.
When the connecting device needs to be disconnected, the inner low melting point metal of the hollow low melting point metal sealed cavity 10 is heated and melted, then the piston head 130 is pressed inwards through the push rod 131, and the low melting point metal is discharged from the hollow low melting point metal sealed cavity 10 through the liquid guide port 11. When the liquid metal is completely discharged, the bolts sealing the valve 12 are loosened, and the second conductive connection terminal 21 is taken out of the valve.
In summary, the piston-type electrical connector based on the low-melting-point metal provided by the invention realizes the injection or discharge of the liquid low-melting-point metal through the liquid absorption or extrusion action of the negative pressure liquid absorption assembly, can ensure that the sealing cavity of the low-melting-point metal is always in a sealed environment, and can avoid the increase of internal resistance caused by the oxidation of the plug in the cavity. The control of electric conduction and outage is realized through the injection or the discharge of liquid low melting point metal, and contact resistance between plug and the socket can be eliminated completely on the one hand, and no stress produces during the insertion, and on the other hand low melting point metal can all be discharged, and independent storage can prevent during non-operating condition, the revealing of liquid low melting point metal. The dual power-off can be realized by arranging the detachable conductive connecting end, and the disassembly and the maintenance are convenient.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (10)
1. A piston type electrical connector based on low-melting-point metal is characterized by comprising a low-melting-point metal sealed cavity, a negative-pressure liquid suction component and a liquid guide port which are arranged on the low-melting-point metal sealed cavity, and at least two conductive connecting ends communicated with the interior of the low-melting-point metal sealed cavity;
when a conductive path needs to be formed, liquid low-melting-point metal is sucked into the low-melting-point metal sealing cavity from the liquid guide port through the negative pressure liquid suction assembly so as to communicate the conductive connecting end;
when the conductive path needs to be disconnected, the liquid low-melting-point metal is extruded out of the low-melting-point metal sealed cavity through the negative pressure liquid suction assembly.
2. The low-melting-point-metal-based piston-type electrical connection device of claim 1, wherein the negative suction assembly is a piston-type negative suction assembly.
3. The low-melting-point-metal-based piston-type electrical connection device as claimed in claim 2, wherein the piston-type negative pressure pipette assembly comprises a piston head disposed in the low-melting-point-metal sealed chamber and a push rod connected to the piston head.
4. The low-melting-point-metal-based piston-type electrical connection device as claimed in claim 3, wherein a limiting pin is arranged in the low-melting-point-metal sealed cavity for limiting the outward displacement of the piston head.
5. The low-melting-point-metal-based piston-type electrical connection device as claimed in claim 3, wherein the low-melting-point-metal sealed cavity is a cylindrical structure.
6. The low-melting-point-metal-based piston-type electrical connection device as claimed in claim 3, wherein the piston head is provided with a through hole communicated with the low-melting-point-metal sealed cavity for fixedly or detachably connecting one or more of the conductive connection terminals.
7. The low-melting-point-metal-based piston-type electrical connection device as claimed in claim 3, wherein the inner wall of the piston head and the inner wall of the low-melting-point-metal seal chamber on the side adjacent to the piston head are both inclined inner walls.
8. The low melting point metal-based piston-type electrical connection device as claimed in claim 1, wherein at least one of the conductive connection ends is detachably connected to the low melting point metal sealed cavity, and a sealing valve is provided at an interface of the low melting point metal sealed cavity and the detachably connected conductive connection end.
9. The low-melting-point-metal-based piston-type electrical connection device as claimed in claim 8, wherein the front end of the detachably-connected conductive connection terminal is tapered, and a tapered recess is provided on an inner wall of the negative pressure suction assembly facing the low-melting-point-metal sealed cavity for accommodating the detachably-connected conductive connection terminal.
10. The low melting point metal-based piston electrical connection device of claim 1, wherein said low melting point conductive metal includes but is not limited to one or more of mercury, gallium-based alloys, sodium potassium alloys, bismuth-based alloys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111103046.2A CN115842253A (en) | 2021-09-18 | 2021-09-18 | Piston type electric connecting device based on low-melting-point metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111103046.2A CN115842253A (en) | 2021-09-18 | 2021-09-18 | Piston type electric connecting device based on low-melting-point metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115842253A true CN115842253A (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111103046.2A Pending CN115842253A (en) | 2021-09-18 | 2021-09-18 | Piston type electric connecting device based on low-melting-point metal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115842253A (en) |
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2021
- 2021-09-18 CN CN202111103046.2A patent/CN115842253A/en active Pending
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