CN217215196U

CN217215196U - Connecting mechanism, electric energy transmission device and motor vehicle

Info

Publication number: CN217215196U
Application number: CN202122400673.4U
Authority: CN
Inventors: 王超; 刘川
Original assignee: Changchun Jetty Automotive Parts Co Ltd
Current assignee: Changchun Jetty Automotive Parts Co Ltd
Priority date: 2021-10-01
Filing date: 2021-10-01
Publication date: 2022-08-16
Anticipated expiration: 2031-10-01

Abstract

The utility model provides a coupling mechanism, electric energy transmission device and motor vehicle, includes public end coupling mechanism and female end coupling mechanism, its characterized in that, public end coupling mechanism include bandlet, flat terminal and with the bandlet with the public end shell that flat terminal is connected, female end coupling mechanism include to the plug terminal and with female end shell that the plug terminal is connected, public end coupling mechanism with female end coupling mechanism passes through flat terminal with the plug terminal electricity is connected, public end shell with female end shell be assembled between/be connected between, form coupling mechanism. The bandlet is range upon range of the setting to set up suitable interval, electromagnetic interference that can effectual reduction bandlet circular telegram caused other spare parts, thereby reach and cancel high-voltage charging wire bundle shielding layer structure, reach the purpose that reduces cost, reduction in weight.

Description

Connecting mechanism, electric energy transmission device and motor vehicle

Technical Field

The utility model relates to a technical field that charges especially relates to a coupling mechanism, electric energy transmission device and motor vehicle.

Background

A new energy battery of a new energy automobile supplements energy by using a charging system. Besides the charging seat, the charging system also comprises a high-voltage connecting mechanism connected with the battery system, the charging harness is the most important unit in the high-voltage system of the electric vehicle, the traditional charging harness adopts a copper wire as a charging cable, and the tail end of the copper wire is connected with a plug-in terminal and is electrically connected with the battery system. The high pressure coupling mechanism at present all is the assembly structure connector, has the structure complicacy, the assembly difficulty, and the high scheduling problem of connector cost, the copper product use amount of cable and terminal in addition, and connection processing is more complicated, also is that high pressure coupling mechanism cost remains high the reason.

When a large current passes through the high-voltage charging harness, electromagnetic interference can be generated on other parts, in order to avoid the electromagnetic interference, a shielding layer needs to be added on the outer side of the high-voltage charging harness, and the cost and the weight of the high-voltage charging harness are obviously increased by the shielding layer.

In addition, in a general charging system, a temperature measuring structure is installed on a charging seat, and a connection mechanism is not provided, but the conduction current is the same, and when the temperature of the connection mechanism rises, monitoring and timely stopping of charging operation are also needed to protect the safety of a charging harness and a battery system.

With the market expansion of electric vehicles, a simple-structure and cost-advantageous connection mechanism and an electric energy transmission device are urgently needed for a charging system.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a coupling mechanism, the range upon range of setting of bandlet to set up appropriate interval, the electromagnetic interference who causes other spare parts after can the circular telegram of effectual reduction bandlet, thereby reach cancellation high-pressure charging wire bundle shielding layer structure, reach the purpose that reduces cost, reduce weight.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a connecting mechanism, including public end coupling mechanism and female end coupling mechanism, public end coupling mechanism include bandlet, flat terminal and with the bandlet with the public end shell that flat terminal is connected, female end coupling mechanism include to the plug-in terminal and with the female end shell that the plug-in terminal is connected, public end coupling mechanism with female end coupling mechanism passes through flat terminal with the plug-in terminal electricity is connected, public end shell with the female end shell is connected, forms coupling mechanism.

In a preferred embodiment, the aspect ratio of the cross-section of the flat strip is 1:1 to 120: 1.

In a preferred embodiment, the number of the flat belts is at least two, the flat belts are stacked up and down, and the male end housing is integrally injection-molded on at least a part of the flat belts and the outer periphery of the flat terminal to form an insulation structure.

In a preferred embodiment, the flat ribbon comprises a flat wire core and an outer insulation layer, the outer insulation layer partially stripping the flat wire core to expose the flat wire core, and the end of the outer insulation layer is in the male housing or is abutted with the male housing.

In a preferred embodiment, the flat ribbon comprises a flat wire core having a hardness of from 8HV to 105 HV.

In a preferred embodiment, the number of the flat belts is at least two, the flat belts are stacked up and down, the flat belts comprise flat wire cores, and the vertical distance between the two flat wire cores is less than or equal to 27 cm.

In a preferred embodiment, the vertical distance between two flat wire cores is less than or equal to 7 cm.

In a preferred embodiment, the number of the flat belts is at least two, the flat belts are stacked up and down, the flat belts comprise flat wire cores, and the overlapping ratio of the two flat wire cores in the stacking direction is 40% -100%.

In a preferred embodiment, the flat belt comprises a flat wire core, the front end of the flat wire core is connected with the flat terminal, and the male end housing covers at least part of the flat terminal.

In a preferred embodiment, the flat ribbon comprises a flat wire core, and the flat wire core and the flat terminal are of an integral structure.

In a preferred embodiment, the flat terminal protrudes at least partially from the male housing or the male housing has a receiving cavity, and the flat terminal protrudes at least partially from the bottom of the receiving cavity but does not protrude beyond the male housing.

In a preferred embodiment, the flat ribbon comprises a flat wire core, a bent part is arranged between the flat wire core and the flat terminal, and the angle of the bent part is 0-180 °.

In a preferred embodiment, the flat terminal is at least partially provided with an electrically conductive corrosion protection layer.

In a preferred embodiment, the thickness of the conductive corrosion protection layer is from 0.3 μm to 3000 μm.

In a preferred embodiment, the thickness of the conductive corrosion protection layer is from 2.5 μm to 1000 μm.

In a preferred embodiment, the flat terminal is provided with a chamfer at an end thereof.

In a preferred embodiment, the male end connection mechanism includes an interlocking connector that is at least partially integrally molded in the male end housing.

In a preferred embodiment, the mating terminal includes a fixing portion and a wire clamping portion, the female terminal connection mechanism further includes a cable, the fixing portion is electrically connected to the conductive portion at the front end of the cable, and the wire clamping portion is electrically connected to the flat terminal.

In a preferred embodiment, a clamp is sleeved on the wire clamping part, and the clamp is made of memory alloy.

In a preferred embodiment, the transformation temperature of the memory alloy is set within the range of 40 ℃ to 70 ℃, and the clamping band is in an expanded state in a state that the temperature of the clamping band is lower than the transformation temperature; and under the condition that the temperature of the clamp is higher than the transformation temperature, the clamp is in a clamping state.

In a preferred embodiment, a clamping hoop is sleeved on the wire clamping portion, the clamping hoop comprises a side wall and an elastic unit fixed on the side wall, and the elastic unit is in contact connection with the outer side of the wire clamping portion.

In a preferred embodiment, the force applied to the wire clamping portion by the elastic unit ranges from 3N to 200N.

In a preferred embodiment, the elastic unit is an elastic rubber body, a spring or a metal elastic sheet.

In a preferred embodiment, the crimping portion of the opposite insertion terminal is formed by stacking a plurality of sheet-like terminals, and the sheet-like terminals are formed with recesses to be mated and inserted with the flat ribbons.

In a preferred embodiment, the gap between two adjacent blade terminals is less than 0.2 mm.

In a preferred embodiment, the material of at least a part of the blade terminal is a memory alloy.

In a preferred embodiment, the transformation temperature of the memory alloy is set in the range of 40 ℃ to 70 ℃, and the plurality of grooves are in an expanded state in a state where the temperature of the tab terminal is lower than the transformation temperature; the plurality of recesses are in a clamped state in a state where the temperature of the tab terminal is higher than the transformation temperature.

In a preferred embodiment, the female housing is integrally injection molded to form an insulating structure around at least a portion of the periphery of the mating terminal.

In a preferred embodiment, the female end connection mechanism further includes a cable electrically connected to the mating terminal, the mating terminal and at least a portion of the cable being disposed within the female end housing, the mating terminal being at least partially exposed outside the female end housing.

In a preferred embodiment, the wire clamping portion at least partially protrudes from an outer wall of the female end housing, or an opening boss is disposed on the female end housing, and the wire clamping portion is at least partially disposed in the opening boss.

In a preferred embodiment, the female end connection mechanism has a high voltage interlock structure that is electrically connected to the interlock connector to form a circuit.

In a preferred embodiment, the female end connection and/or the male end connection has a sealing structure.

In a preferred embodiment, the seal structure is over-molded on the female end housing and/or the male end housing.

In a preferred embodiment, the female connection mechanism and/or the male connection mechanism has at least one temperature measuring structure for measuring the temperature of the mating terminal and/or the flat band and/or the flat terminal.

In a preferred embodiment, the temperature measuring structure is attached to the inserted terminal and/or the flat strip and/or the flat terminal for measuring the temperature of the inserted terminal and/or the flat strip and/or the flat terminal.

In a preferred embodiment, the male end connecting mechanism has at least one temperature measuring structure, the number of the flat belts is at least two, and the temperature measuring structure is located between the flat belts and used for measuring the temperature of the flat belts.

In a preferred embodiment, the male end connection mechanism and the female end connection mechanism are connected by one or more of a sticking connection, a magnetic attraction connection, a bayonet connection, a plug connection, a latch connection, a bundling connection, a threaded connection, a rivet connection and a welding connection.

In a preferred embodiment, the insertion terminal includes a wire clamping portion, the flat terminal and the wire clamping portion are inserted into each other to form an electrical connection, and an insertion force between the flat terminal and the wire clamping portion is between 3N and 150N.

In a preferred embodiment, the insertion force between the flat terminal and the wire clamping portion is between 10N and 130N.

In a preferred embodiment, the contact resistance between the flat terminal and the opposite insertion terminal is less than 9m Ω.

In a preferred embodiment, the contact resistance between the flat terminal and the opposite insertion terminal is less than 1m Ω.

In a preferred embodiment, the number of times of inserting and pulling between the male end connecting mechanism and the female end connecting mechanism is greater than or equal to 9 times.

In a preferred embodiment, the male end connection mechanism has a weight of 305g or less.

In a preferred embodiment, the height of the male end connecting mechanism along the plugging direction is less than or equal to 108 mm.

The utility model provides an electric energy transmission device contains above-mentioned arbitrary coupling mechanism.

The utility model provides a motor vehicle contains above-mentioned arbitrary coupling mechanism.

The utility model has the characteristics and advantages that:

1. the utility model discloses a coupling mechanism sets up injection moulding's public end shell, and processing is simple, and the cost is lower, can directly mould plastics and carry out the insulation among the bandlet, can reduce the installation of bandlet to can be multiple shape according to the demand shaping with the bandlet front end, and need not consider the problem of assembly, save manufacturing procedure, reduce the processing cost.

2. The utility model discloses a coupling mechanism, the range upon range of setting of bandlet to set up suitable interval, the electromagnetic interference who causes other spare parts after can the circular telegram of effectual reduction bandlet, thereby reach cancellation high-voltage charging wire bundle shielding layer structure, reach the demand that reduces cost, reduce weight.

3. In the connection of the flat terminal and the opposite-inserting terminal, the conductive anti-corrosion layer can reduce the electrochemical reaction between the flat terminal of the flat belt and the opposite-inserting terminal, and the technical problem that the flat belt can be connected with other terminals or electric devices only through the copper terminal is solved.

4. The plug-in terminal is stacked up by a plurality of flake terminals and distributes, and the flake terminal easily warp, can peg graft with the flat terminal of bandlet, and the flat terminal of bandlet contacts with the banding recess of flake terminal, realizes the electricity and connects, can ensure the stability of being connected plug-in terminal and bandlet.

5. The flat wire core and the flat terminal of the flat belt form an integrated structure, and the integrated structure is directly connected with the plug terminal, so that the problems of high cost and low efficiency of the flat belt needing to be connected with the copper terminal are solved, and safe and quick plugging can be realized.

6. The plug terminal has a memory function, when the abnormal temperature is lower, the strip-shaped groove of the plug terminal is usually in an expanded state, the flat terminal of the flat belt can be butted without insertion force, and the plug terminal is convenient for operators to easily plug electrical equipment. The plug terminal conduction current in work, because the effect of resistance rises to plug terminal temperature gradually, when the temperature rose above the abnormal temperature, the banded recess to plug terminal will radially contract, increased the area of contact and the contact force of the banded terminal of banded recess and bandlet to plug terminal through the rising of temperature, improved the reliability of contact, owing to saved the requirement of insertion force, work is lighter, and work efficiency improves.

7. The embedded high-voltage interlocking structure replaces the prior assembled high-voltage interlocking, is fixed in the connecting mechanism in an integrated injection molding mode, does not need to be assembled, reduces the cost and completely meets the high-voltage interlocking effect.

8. The sealing structure of the connecting mechanism is not provided with an independent sealing ring, but adopts a secondary injection molding sealing structure to replace the traditional sealing ring, can be directly molded on the connecting mechanism, and has better injection molding combination property and reduced cost.

9. Adopt temperature measurement mechanism, can monitor the inside terminal temperature of coupling mechanism alone, avoid because the temperature sensor of other positions damages, and can't monitor coupling mechanism's temperature.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of the structure of the middle connection mechanism of the present invention.

Fig. 2 is a schematic view of the structure of the middle male end connection mechanism of the present invention.

Fig. 3 is a schematic view of the structure of the flat wire core of the present invention.

Fig. 4 is a schematic view of the structure of the female-end connection mechanism of the present invention.

Fig. 5 is a schematic view of the structure of the plug-in terminal of the present invention.

Fig. 6 is a schematic diagram of the plug structure of the flat wire core and the plug terminal of the present invention.

Fig. 7 is a schematic structural view of the interlock connector of the present invention.

Fig. 8 is a schematic view of the high-voltage interlock structure of the present invention.

Fig. 9 is a schematic view of the magnetic field structure of the flat wire core of the present invention.

Fig. 10 is a structural schematic diagram of the vertical distance between the flat core and the flat core of the present invention.

Fig. 11 is a schematic structural view of the flat wire core of the present invention.

FIG. 12 is a schematic view of the structure of the middle clip of the present invention

Fig. 13 is a schematic cross-sectional view of the connection mechanism structure in the direction a in fig. 1 according to the present invention.

Wherein:

10. a male end connection mechanism; 11. a flat belt; 111. a flat wire core; 112. an outer insulating layer; 113. a flat terminal; 1131. A bending section; 12. a male end housing; 14. an interlocking connector;

20. a female end connection mechanism; 21. a cable; 22. a female end housing; 23. a mating terminal; 231. a fixed part; 232. A wire clamping part; 234. a chip terminal; 24. a high-pressure interlock structure;

30. clamping; 31. a side wall; 32. an elastic unit;

40. and (5) sealing the structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

A connecting mechanism comprises a male end connecting mechanism 10 and a female end connecting mechanism 20, wherein the male end connecting mechanism 10 comprises a flat belt 11, a flat terminal 113 and a male end shell 12 connected with the flat belt 11 and the flat terminal 113, the female end connecting mechanism 20 comprises an opposite plug terminal 23 and a female end shell 22 connected with the opposite plug terminal 23, the male end connecting mechanism 10 and the female end connecting mechanism 20 are electrically connected with the opposite plug terminal 23 through the flat terminal 113, and the male end shell 12 is connected with the female end shell 22 to form a connecting mechanism, as shown in figures 1-4.

The bandlet is range upon range of to set up suitable interval, electromagnetic interference that can effectual reduction bandlet circular telegram after to other spare parts cause, thereby reach and cancel high-voltage charging wire bundle shielding layer structure, reach the demand that reduces cost, reduction in weight.

Furthermore, the bandlet 11 has very big advantage in heat dissipation, assembly, because bandlet 11 conducting part's aspect ratio is great, also has great plane contact external environment promptly, can carry out effectual heat dissipation, can reduce the cable temperature rise that the electric current leads to rapidly, prolongs the life of cable. In addition, when the cable is assembled and the installation environment is not high enough, the flat belt 11 can be adopted, the cable laying height is reduced, the cable can be effectively attached to the installation environment for assembly, the requirement on the installation space is reduced, and the space utilization rate is improved.

In some embodiments, the flat ribbon 11, the flat terminal 113, and the plug terminal 23 are made of a conductive metal material containing one or more of nickel, cadmium, zirconium, chromium, cobalt, manganese, aluminum, tin, titanium, zinc, copper, silver, gold, phosphorus, tellurium, beryllium, and lead, which has stable properties and good conductivity, and the preferred material is a material containing copper or a copper alloy or aluminum or an aluminum alloy.

In some embodiments, the material of the flat belt 11 is one or more of aluminum, phosphorus, tin, copper, iron, manganese, chromium, titanium, and lithium, wherein the material of the flat belt 11 contains aluminum or an aluminum alloy, which is one of the main means for energy saving and cost reduction in recent years. In the field of electrical connection, copper wires are used for conducting current, and copper has high conductivity and good ductility. However, as copper prices have increased, the material cost for using copper materials as the conductive wires has become higher. For this reason, alternatives to metallic copper are being sought to reduce costs. The content of metal aluminum in the earth crust is about 7.73%, the price is relatively low after the refining technology is optimized, the weight of the aluminum is lighter than that of copper, the conductivity is only inferior to that of the copper, and the aluminum can replace part of the copper in the field of electrical connection. Therefore, aluminum is a trend in the field of automotive electrical connection to replace copper.

In one embodiment, the aspect ratio of the cross-sectional area of the flat ribbon 11 is 1:1 to 120: 1.

In order to verify the influence of the length and width of the cross section of the flat belt 11 on the temperature rise and tensile strength of the flat belt 11, the inventor selects flat belt 11 samples with the same sectional area specification and different length-width ratios, and tests the temperature rise and tensile strength of the flat belt 11, wherein the test results are shown in table 1.

Test method of temperature rise of flat belt 11: the same current is applied to the flat belt 11, the temperature of the same position of the flat belt 11 before the application of the current and after the temperature stabilization is detected in a closed environment, and the absolute value is obtained by taking the difference. In this example, a temperature rise greater than 50K is considered unacceptable.

Method for testing tensile strength of flat belt 11: using a universal tensile testing machine, fixing two ends of the flat belt 11 sample piece on a stretching clamp of the universal tensile testing machine respectively, stretching at a speed of 50mm/min, and recording a tensile value at the final stretch-break, wherein in the embodiment, the tensile value is greater than 1600N as a qualified value.

Table 1: influence of the length/width ratio of the cross section of the flat belt 11 on the temperature rise and tensile strength of the flat belt 11

As can be seen from table 1 above, when the aspect ratio of the cross section of the flat belt 11 is less than 1:1, it is not acceptable that the temperature rise of the flat belt 11 is greater than 50K, and when the aspect ratio of the cross section of the flat belt 11 is greater than or equal to 1:1, it is acceptable that the temperature rise of the flat belt 11 is less than 50K, and the condition becomes better, because the larger the aspect ratio of the cross section of the flat belt 11 is, the larger the heat dissipation area of the flat belt 11 is, the same temperature is increased, and the lower the temperature rise value of the flat belt 11 with better heat dissipation is. When the aspect ratio of the cross section of the flat belt 11 is greater than 120:1, because the flat belt 11 is too thin, when the flat belt 11 is under tension, the too thin flat belt 11 cannot bear large tension and is broken, and at this time, the tensile strength of the flat belt 11 does not meet the requirement of a qualified value. Accordingly, the inventors set the cross-sectional aspect ratio of the ribbon 11 to be 1:1 to 120: 1.

In one embodiment, as shown in fig. 2, at least two flat belts 11 are provided, the flat belts 11 are stacked up and down, and the male housing 12 is integrally injection-molded around at least a portion of the flat belts 11 and the flat terminals 113 to form an insulating structure.

A general conductive circuit is configured with two circuits, for example, a dc positive charging cable and a dc negative charging cable in a dc charging station, and an ac live line charging cable and an ac neutral line charging cable in an ac charging station. The flat belts 11 are stacked up and down, so that the assembly space can be effectively utilized, and the function of counteracting electromagnetic interference is achieved. After the two flat belts 11 are stacked up and down, the raw material of the male end housing 12 is injected between the flat belts 11 and the periphery through an injection mold to form the male end housing 12.

In some embodiments, when there are more circuits to be connected, the number of the flat belts 11 may be 3, 4 or more, and different circuits are connected.

The coupling mechanism in this embodiment sets up injection moulding's public end shell 12, and processing is simple, and the cost is lower, can directly mould plastics and carry out the insulation among bandlet 11, can reduce bandlet 11's installation to can be the multiple shape with bandlet 11 front end according to the demand shaping, and need not consider the problem of assembly, save manufacturing procedure, reduce the processing cost.

Furthermore, the bandlet 11 has very big advantage in heat dissipation, assembly, because the width height ratio of 11 conducting parts of bandlet is great, also has great plane contact external environment, can carry out effectual heat dissipation, can reduce the cable temperature rise that the electric current leads to rapidly, prolongs the life of cable. In addition, when the cable is assembled and the installation environment is not high enough, the flat belt 11 can be adopted, the cable laying height is reduced, the cable can be effectively attached to the installation environment for assembly, the requirement on the installation space is reduced, and the space utilization rate is improved.

In one embodiment, the flat ribbon 11 includes a flat wire core 111 and an outer insulation layer 112, the outer insulation layer 112 is partially stripped to expose the flat wire core 111, and the end of the outer insulation layer 112 is in the male housing 12 or abuts against the male housing 12.

Before the injection molding of the male end housing 12, a portion of the outer insulating layer 112 of the flat belt 11 needs to be stripped off to expose the flat core 111 inside, and then the integral injection molding of the male end housing 12 is performed.

Preferably, the flat ribbon 11 comprises a flat wire core 111, the hardness of the flat wire core 111 being 8HV to 105 HV.

In order to verify the influence of the hardness of the flat wire core 111 on the force of peeling the flat terminal 113 from the flat wire core 111 and the torque of bending the flat wire core 111 in the XY directions, the inventors selected samples of flat wire cores 111 of the same size and different hardness, and tested the force of peeling the flat terminal 113 from the flat wire core 111 and the torque of bending the flat wire core 111, and the test results are shown in table 2.

Method for testing peeling force of flat terminal 113: the flat terminal 113 and the flat wire core 111 are respectively vertically fixed on a drawing jig of a universal tensile testing machine by using the universal tensile testing machine, and are drawn at a speed of 50mm/min, and the final tensile value when the flat terminal 113 is peeled from the flat wire core 111 is recorded, and in this embodiment, the tensile value is greater than 900N, which is a qualified value.

The torque test method when the flat wire core 111 is bent comprises the following steps: when the flat wire core 111 is bent at 90 degrees at the same speed and the same radius by using a torque tester, the torque value of the deformation of the flat wire core 111 in the bending process is tested, and in the embodiment, the torque value is less than 30N · m, which is a qualified value.

Table 2: influence of hardness of the flat wire core 111 on peeling force of the flat terminal 113 and torque at the time of bending the flat wire core 111

It can be seen from table 2 above that, when the hardness of the flat wire core 111 is less than 8HV, the pulling force value of the flat terminal 113 when peeled off from the flat wire core 111 is less than the qualified value, and at this time, the flat terminal 113 connected to the flat wire core 111 is easily peeled off from the flat wire core 111 under the external force, so that the circuit conduction to the wire core 111 cannot be realized, and the function of the flat wire core 111 fails, so that the purpose of power transmission cannot be achieved, and a short circuit can be caused to cause a combustion accident in a serious case. When the hardness of flat sinle silk 111 is for being greater than 105HV, because the hardness of flat sinle silk 111 itself is very high, when flat sinle silk 111 needs to be bent, need bigger moment of torsion to make flat sinle silk 111 warp, the value of moment of torsion does not satisfy the passing value requirement this moment. Therefore, the inventors set the hardness of the flat wire core 111 to 8HV to 105 HV.

As can be seen from the data in table 2, when the hardness of the flat wire core 111 is 10HV to 55HV, the tensile force value when the flat terminal 113 is peeled off from the flat wire core 111 and the torque value when the flat wire core 111 is bent in the XY direction are both in a good range, and therefore, the inventors prefer that the hardness of the flat wire core 111 is 10HV to 55 HV.

Further, at least two flat belts 11 are provided, the flat belts 11 are stacked up and down, the flat belts 11 comprise flat wire cores 111, and the vertical distance between the two flat wire cores 111 is smaller than or equal to 27 cm.

Further, the vertical distance between the two flat wire cores 111 is less than or equal to 7 cm.

As shown in fig. 9, when the flat belt 11 is powered on, an induced magnetic field will be generated, and the induced magnetic field will generate electromagnetic interference to the outside, and a common solution in the prior art is to provide an electromagnetic shielding layer outside the flat belt 11. In order to cancel shielding structure, reduce cost, weight reduction, the utility model discloses a following design, an electric energy transmission system for vehicle includes the bandlet 11 of two range upon range of settings.

When two flat belts 11 are placed one on top of the other, the magnetic field generated is as shown in fig. 9-11. Because the flat wire cores 111 are of a flat structure, the strongest magnetic field is positioned at the position with the largest area, the magnetic fields of the two flat wire cores 111 can be offset by laminating the flat wire cores 111 (because the current in the two flat wire cores 111 has the same magnitude and the same current direction A, the induced magnetic field strength has the same direction and the opposite direction), and the electromagnetic interference on other electric devices when the flat wire cores 111 are electrified is eliminated.

Preferably, the two flat belts 11 are parallel to each other in the width direction. The flat bands 11 are mirror images of each other. The distance between the two flat band cores 111 is H. The two flat belts 11 are stacked in the vertical direction in fig. 10.

When the overlapping ratio of the two flat belts 11 in the stacking direction is 100%, the influence of the distance H between the flat belt cores 111 on the magnetic field cancellation is shown in table 3, and the percentage of the magnetic field cancellation greater than 30% is a qualified value.

Table 3: when the lamination overlapping degree of the two flat belts 11 is 100%, the influence of the distance H between the flat wire cores 111 on the magnetic field cancellation

The term "overlap ratio" means the percentage of the overlapping area of the two flat belts 11 in the stacking direction to the area of one flat belt 11.

As can be seen from table 3, when the overlapping ratio of the two flat belts 11 in the stacking direction is 100%, and the distance H between the two flat belt cores 111 is less than or equal to 27cm, the magnetic field cancellation percentage is qualified, and a certain effect is provided on electromagnetic interference prevention; preferably, when the vertical distance between the two flat band cores 111 is less than or equal to 7cm, the magnetic field can be effectively counteracted, and the effect is obvious, so that the distance H between the two flat band cores 111 is further less than or equal to 7 cm.

According to the connecting mechanism of the embodiment, the flat belts 11 are arranged in a stacked mode, and appropriate intervals are set, so that electromagnetic interference on other parts after the flat belts 11 are electrified can be effectively reduced, a connecting structure shielding device is omitted, and the requirements of reducing cost and reducing weight are met.

In one embodiment, there are at least two ribbons 11, the ribbons 11 are stacked one on top of the other, the ribbons 11 include a ribbon core 111, and the ratio of overlapping of the two ribbon cores 111 in the stacking direction is 40% to 100%.

When the straps 11 are laid one on top of the other. Because the flat belt 11 is of a flat structure, the strongest magnetic field is positioned at the position with the largest area, the magnetic fields of the positive and negative flat belt cores 111 can be offset by the lamination of the flat belt 11, and the electromagnetic interference to other electric devices when the flat belt 11 is electrified is eliminated.

Distance between bandlet 11 and the stromatolite contact ratio of bandlet 11 have very big influence to the degree of offsetting in magnetic field, the utility model discloses a control effectively offsets the magnetic field of bandlet 11 to the stromatolite distance and the contact ratio of two bandlets of the stromatolite design of two bandlets 11.

When the distance between the flat belt cores 111 of the two flat belts 11 is 7cm, the influence of the overlap ratio of the two flat belts 11 in the stacking direction on the magnetic field cancellation is shown in table 4, and the percentage of the magnetic field cancellation greater than 30% is a passing value.

Table 4: when the distance between the two flat belt cores 111 is 7cm, the influence of the overlapped area of the flat belts 11 on magnetic field cancellation

As can be seen from table 4, when the distance between the two flat belt cores 111 is 7cm, the overlap ratio of the flat belts 11 in the stacking direction is 40% to 100%, the magnetic field cancellation percentage is acceptable, and a certain effect is provided for electromagnetic interference resistance, the overlap ratio of the two flat belts 11 in the stacking direction is more than 90%, which is obvious, and the effect is optimal when the overlap ratio of the two flat belts 11 in the stacking direction is 100%.

In one embodiment, as shown in fig. 2-3, the flat ribbon 11 includes a flat wire core 111, the front end of the flat wire core 111 is connected to a flat terminal 113, and the male housing 12 covers at least a portion of the flat terminal 113. The flat belt 11 is stripped of the outer insulating layer 112, the flat wire core 111 is exposed, the part electrically connected with the plug-in terminal 23 is the flat terminal 113, the flat terminal 113 is arranged, the plug-in terminal 23 can be effectively connected with the plug-in terminal in a plug-in mode, and effective electric connection of the connecting mechanism is achieved.

As shown in fig. 6, in order to effectively connect the flat terminal 113 with the mating terminal 23, the flat terminal 113 needs to be exposed outside the male housing 12 during the process of integrally molding the flat belt 11 and the male housing 12, so as to prevent the flat terminal 113 and the mating terminal 23 from being unable to be connected by plugging due to the covering of the male housing 12.

Preferably, the front end of the flat wire core 111 and the flat terminal 113 are connected by one or more of resistance welding, friction welding, ultrasonic welding, arc welding, laser welding, electron beam welding, pressure diffusion welding, magnetic induction welding, screw connection, clamping, splicing and crimping.

The resistance welding method is a method of welding by using a strong current to pass through a contact point between an electrode and a workpiece and generating heat by a contact resistance, and the front end of the flat wire core 111 and the conductive portion of the flat terminal 113 are welded by resistance welding.

The friction welding method is a method of welding by plastically deforming a workpiece under pressure using heat generated by friction of a contact surface of the workpiece as a heat source, and the tip of the flat wire core 111 and the conductive portion of the flat terminal 113 are welded by friction welding.

The ultrasonic welding method is a method in which a high-frequency vibration wave is transmitted to the surfaces of two objects to be welded, and the surfaces of the two objects are rubbed against each other under pressure to form fusion between molecular layers, and the tip of the flat core 111 and the conductive portion of the flat terminal 113 are ultrasonically welded.

The arc welding method is a method of connecting metals by converting electric energy into thermal energy and mechanical energy required for welding using an electric arc as a heat source and utilizing a physical phenomenon of air discharge, and the main methods include shielded metal arc welding, submerged arc welding, gas shielded welding, and the like.

The laser welding method is an efficient and precise welding method using a laser beam with high energy density as a heat source.

The electron beam welding mode is that accelerated and focused electron beams are used to bombard the welding surface in vacuum or non-vacuum to melt the workpiece to be welded for welding.

The pressure welding method is a method of applying pressure to a workpiece to bring the joining surfaces into close contact with each other to generate a certain plastic deformation, thereby completing welding.

Diffusion welding refers to a solid state welding method in which a workpiece is pressed at a high temperature without visible deformation and relative movement.

The magnetic induction welding mode is that two workpieces to be welded produce instantaneous high-speed collision under the action of strong pulse magnetic field, and the surface layer of the material makes the atoms of the two materials meet in the interatomic distance under the action of very high pressure wave, so that a stable metallurgical bonding is formed on the interface.

The screw connection mode refers to a screw connection, and the connected piece is connected into a whole by a screw element (or a screw thread part of the connected piece) to form a detachable connection. The common threaded connecting parts include bolts, studs, screws, set screws and the like, and are mostly standard parts.

The clamping connection mode is that corresponding clamping jaws or clamping grooves are respectively arranged on the connecting end or the connecting surface, and the clamping jaws are assembled to be connected together. The clamping mode has the advantages of quick connection and detachability.

The splicing mode is that corresponding grooves and protrusions are respectively arranged on the connecting ends or the connecting surfaces, and the connecting ends or the connecting surfaces are assembled through the mutual joggling or splicing of the grooves and the protrusions so as to be connected together. The splicing mode has the advantages of stable connection and detachability.

The crimping mode is a production process that the connecting end and the connecting surface are assembled and then are punched into a whole by using a crimping machine. The advantage of crimping is mass productivity, and the adoption of automatic crimping machines can rapidly manufacture a large number of products of stable quality.

Through the connection mode, according to the actual use environment, the front end of the flat wire core 111 and the actual use state of the conductive part of the flat terminal 113 can be used for selecting a proper connection mode or a combination of connection modes, so that effective electrical connection is realized.

In some embodiments, the ribbon 11 includes a flat wire core 111, and the flat wire core 111 and the flat terminal 113 are of a unitary structure. The flat wire core 111 and the flat terminal 113 can be made of the same material, so that the use of the flat terminal 113 can be saved, the material cost is reduced, the processing time is saved, and the front end of the flat wire core 111 can be molded into various shapes as required without considering the problem of assembly.

Further, the flat terminal 113 at least partially protrudes out of the male end housing 12, or the male end housing 12 has a receiving cavity, and the flat terminal 113 at least partially protrudes out of the bottom surface of the receiving cavity but does not exceed the male end housing 12. The flat terminal 113 is protruded out of the male housing 12, and can be directly connected to the mating terminal 23 in the female housing 22 by mating, or can be disposed in the accommodating cavity of the male housing 12, and is inserted into the accommodating cavity by the mating terminal 23 in the female housing 22 and connected to the flat terminal 113 by mating.

Through the connection of flat terminal 113 and plug terminal 23, flat terminal 113 of bandlet 11 self realizes the function of terminal, directly is connected with plug terminal 23, has solved the problem that the bandlet 11 need be connected the copper terminal with high costs, and is inefficient, can realize safe, quick plug.

In one embodiment, as shown in fig. 3, the flat ribbon 11 includes a flat wire core 111, and a bent portion 1131 is included between the flat wire core 111 and the flat terminal 113, wherein the angle of the bent portion 1131 is 0 ° to 180 °. Different bending angles are set to by the bending part 1131, different shapes can be suitable for, different connection mechanisms to the plug-in terminal 23 direction, according to the needs of installation environment, and connection mechanism simplifies the structure, reduce the needs of connection space, the designer can set for the bending part 1131 of different angles, be used for connecting with the plug-in terminal 23 of different angles, thereby change the cable trend on connection mechanism both sides, in addition, the main part of bandlet 11 is connected through bending part 1131 with flat terminal 113, adjust the extending direction of bandlet 11 through bending part 1131, make things convenient for bandlet 11 and installation environment looks adaptation.

In this embodiment, the advantage of bandlet 11 still lies in convenient bending, and bandlet 11 can keep the shape after the bending promptly, can arrange along with the automobile body panel beating like this, can bend the shaping as required in different positions to save space, also can conveniently fix simultaneously.

In one embodiment, the blade terminal 113 is at least partially provided with an electrically conductive corrosion protection layer. When the materials of the flat terminal 113 and the opposite plug terminal 23 are not the same, the electric conduction therebetween will generate electrochemical corrosion due to potential difference, thereby reducing the service life of the flat terminal 113 and the opposite plug terminal 23, in order to reduce the electrochemical corrosion, a conductive anti-corrosion layer can be arranged on the flat terminal 113, and the conductive anti-corrosion material can use a metal material with potential between the potential potentials of the materials of the flat terminal 113 and the opposite plug terminal 23, thereby isolating the flat terminal 113 and the opposite plug terminal 23, slowing down the electrochemical corrosion, and prolonging the service life of the flat terminal 113 and the opposite plug terminal 23.

In the connection between the flat terminal 113 and the opposite-inserting terminal 23, the conductive anti-corrosion layer can reduce the electrochemical reaction between the flat terminal 113 of the flat belt 11 and the opposite-inserting terminal 23, and solve the technical problem that the flat belt 11 can be connected with other terminals or electric devices only through terminals made of other materials.

Further, the conductive anti-corrosion layer is attached to at least a portion of the surface of the flat terminal 113 by one or more of electroplating, chemical plating, magnetron sputtering, vacuum plating, pressure welding, diffusion welding, friction welding, resistance welding, ultrasonic welding, or laser welding.

The electroplating method is a process of plating a thin layer of other metals or alloys on the surface of some metals by utilizing the electrolysis principle.

The chemical plating method is a deposition process for generating metal through controllable oxidation-reduction reaction under the catalysis of the metal.

The magnetron sputtering method is characterized in that electrons spirally run near the surface of a target by utilizing the interaction of a magnetic field and an electric field, so that the probability of generating ions by the electrons colliding with argon is increased. The generated ions collide with the target surface under the action of the electric field so as to sputter the target material.

The vacuum plating method is to deposit various metal and non-metal films on the surface of a plastic part by distillation, sputtering or other modes under a vacuum condition.

Pressure welding is a method of applying pressure to a welding material to make the joining surfaces closely contact and generate a certain plastic deformation to complete welding.

The friction welding method is a method of welding by plastically deforming a workpiece under pressure using heat generated by friction of a contact surface of the workpiece as a heat source.

The resistance welding method is a method of welding by using a strong current to pass through a contact point between an electrode and a workpiece and generating heat by a contact resistance.

The ultrasonic welding method is a method in which high-frequency vibration waves are transmitted to the surfaces of two objects to be welded, and the surfaces of the two objects are rubbed against each other under pressure to form fusion between the molecular layers.

Diffusion welding refers to a solid state welding method in which a workpiece is pressed at a high temperature without visible deformation and relative movement. In various manners or combinations thereof, the conductive anti-corrosion layer can be stably provided on the surface of the flat terminal 113.

In one embodiment, the conductive corrosion protection layer has a thickness of 0.3 μm to 3000 μm.

In one embodiment, the conductive corrosion protection layer has a thickness of 2.5 μm to 1000 μm.

In order to test the influence of the thicknesses of the different conductive anti-corrosion layers on the voltage drop, the inventor adopts the patch part 113 with the same material and structure, respectively arranges the conductive anti-corrosion layers with different thicknesses on the flat terminal 113, and then tests the voltage drop after the flat terminal 113 is plugged with the plug-in terminal 23. The results are shown in Table 5.

In the present embodiment, it is not acceptable that the voltage drop of the flat terminal 113 after being plugged into the plug terminal 23 is greater than 4 mV.

TABLE 5 influence of different conductive anticorrosion layer thicknesses on the voltage drop (mV):

as can be seen from the above data, when the thickness of the conductive anticorrosion layer is greater than 3000 μm and less than 0.3 μm, the voltage drop of the plug-in structure of the flat terminal 113 and the counter-plug terminal 23 is greater than 4mV, which is not a desirable value, and therefore, the inventors selected the thickness of the conductive anticorrosion layer to be 0.3 μm to 3000 μm. Among them, when the thickness of the conductive corrosion prevention layer is in the range of 2.5 μm to 1000 μm, the voltage drop of the plug-in structure of the flat terminal 113 and the counter-plug terminal 23 is an optimum value, and therefore, it is preferable that the thickness of the conductive corrosion prevention layer is 2.5 μm to 1000 μm.

In one embodiment, the conductive anticorrosion layer is made of a material containing one or more of nickel, cadmium, manganese, zirconium, cobalt, tin, titanium, chromium, gold, silver, zinc, tin-lead alloy, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver, hard silver, and silver-gold-zirconium alloy.

Preferably, the conductive anti-corrosion layer is made of the same material as the battery electrode to which the flat terminal 113 is joined. Such a configuration can enhance the surface strength of the flat terminal 113 and prevent corrosion caused by the lap joint of the flat terminal 113 and the dissimilar metal.

Taking the flat belt 11 as an example, a conductive anti-corrosion layer is disposed on the flat terminal 113, and in order to demonstrate the effect of different conductive anti-corrosion materials on the performance of the flat terminal 113, the inventors performed a series of corrosion resistance time tests using flat terminals 113 of different conductive anti-corrosion materials with the same specification and material, and the experimental results are shown in table 6.

The corrosion resistance time test in table 6 is to put a sample of the flat terminal 113 into a salt spray test chamber, spray salt spray to each position of the flat terminal 113, take out the sample every 20 hours, clean and observe the surface corrosion condition, namely a period, stop the test until the surface corrosion area of the sample of the flat terminal 113 is greater than 10% of the total area, and record the period number at that time. In this example, the number of cycles less than 80 was considered to be unacceptable.

Table 6: effect of different conductive anticorrosion layer materials on the corrosion resistance of the flat terminal 113 sample

As can be seen from Table 6, when the material of the conductive anti-corrosion layer contains the commonly used metals of tin, nickel and zinc, the experimental results are inferior to those of other selected metals, and the experimental results of other selected metals exceed the standard value more and have more stable performance. Therefore, the inventor selects the material of the conductive anti-corrosion layer to contain (or be) one or more of nickel, cadmium, manganese, zirconium, cobalt, tin titanium, chromium, gold, silver, zinc-tin-lead alloy, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver, hard silver and silver-gold-zirconium alloy. And more preferably, the material of the conductive anti-corrosion layer is selected to contain (or is) one or more of cadmium, manganese, zirconium, cobalt, titanium, chromium, gold, silver, tin-lead alloy, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver, hard silver and silver-gold-zirconium alloy.

In one embodiment, the ends of the flat terminals 113 are chamfered. When the flat belt 11 is processed and installed, when the opposite plug terminal 23 is installed, there will be assembly errors, and at this time, there will be large assembly errors in the assembly of the flat terminal 113 and the opposite plug terminal 23, and in order to enable the flat terminal 113 to be conveniently and accurately connected with the opposite plug terminal 23, a chamfer needs to be provided at the end of the flat terminal 113, so that when the flat belt is inserted into the opposite plug terminal 23, a guiding effect is achieved.

In one embodiment, as shown in fig. 7 and 13, the male end connection mechanism 10 includes an interlock connector 14, the interlock connector 14 being at least partially integrally molded in the male end housing 12. The high-voltage interlocking is a safety design method for monitoring the integrity of a high-voltage circuit by using a low-voltage signal, a specific high-voltage interlocking implementation form has different designs for different projects, and the high-voltage interlocking is used for monitoring the accidental disconnection of the high-voltage circuit, so that the damage to an automobile caused by sudden power loss is avoided. In the high-voltage interlock of this embodiment, as shown in fig. 13, one end is an interlock connector 14, in order to have two opposite pins, and two U-shaped or V-shaped low-voltage circuits electrically connected to the pins do not need to be installed, and the two low-voltage circuits can be directly molded in the male end housing 12 and are connected to the high-voltage interlock structure 24 in the female end connection mechanism 20 in a matching manner by an integral injection molding manner, so as to form a low-voltage monitoring circuit.

In one embodiment, as shown in fig. 5, the mating terminal 23 includes a fixing portion 231 and a wire clamping portion 232, the female terminal connection mechanism 20 further includes the cable 21, the fixing portion 231 is electrically connected to a conductive portion at the front end of the cable 21, and the wire clamping portion 232 is electrically connected to the flat terminal 113. The wire clamping portion 232 of the mating terminal 23 is electrically connected to the flat terminal 113 by mating, and the flat ribbon 11 and the cable 21 can be electrically connected in a loop.

Further, the fixing part 231 and the conductive part at the front end of the cable 21 are connected by one or more of resistance welding, friction welding, ultrasonic welding, arc welding, laser welding, electron beam welding, pressure diffusion welding, magnetic induction welding, screwing, clamping, splicing and crimping.

The resistance welding method is a method of welding by applying a strong current to a contact point between an electrode and a workpiece to generate heat by a contact resistance, and the fixing unit 231 and the conductive portion of the cable 21 are welded by resistance welding.

The friction welding method is a method of welding by plastically deforming a workpiece under pressure using heat generated by friction of a contact surface of the workpiece as a heat source, and the fixing portion 231 and the conductive portion of the cable 21 are welded by friction welding.

The ultrasonic welding method is a method in which a high-frequency vibration wave is transmitted to the surfaces of two objects to be welded, and the surfaces of the two objects are rubbed against each other under pressure to form fusion between the molecular layers, and the fixing portion 231 and the conductive portion of the cable 21 are ultrasonically welded.

The magnetic induction welding mode is that two workpieces to be welded produce instantaneous high-speed collision under the action of strong pulse magnetic field, and the surface layer of the material makes the atoms of the two materials meet in the interatomic distance under the action of very high pressure wave, so that a stable metallurgical bonding is formed on the interface. Which is one type of solid state cold welding, the anchor 231, which may or may not be similar in nature, and the conductive portion of the cable 21 may be welded together.

The screw connection mode refers to a screw connection, and the connected piece is connected into a whole by a screw element (or a screw thread part of the connected piece) to form a detachable connection. The common threaded connecting parts comprise bolts, studs, screws, set screws and the like, and are mostly standard parts.

The crimping mode is a production process that the connecting end and the connecting surface are assembled and then are punched into a whole by using a crimping machine. The crimping has an advantage of mass productivity, and a product of stable quality can be rapidly manufactured in a large quantity by using an automatic crimping machine.

Through the above connection method, according to the actual usage environment, the appropriate connection method or combination of connection methods can be selected according to the actual usage state of the fixing part 231 and the conductive part of the cable 21, so as to realize effective electrical connection.

In some embodiments, the clamping portion 232 is sleeved with the clamping band 30, as shown in fig. 12, the clamping band 30 is made of memory alloy. The clamp 30 is capable of clamping the clamping wire portion 232, a memory alloy is a smart metal with memory, its microstructure has two relatively stable states, the alloy can be brought into any desired shape at high temperature, the alloy can be stretched at lower temperatures, but if it is reheated it remembers its original shape and goes back, the crystal structure of the memory alloy above and below its metamorphic temperature is different, but when the temperature changes above and below the metamorphic temperature, the memory alloy contracts or expands causing its morphology to change. In some embodiments, the memory alloy is a nickel titanium alloy.

Further, the transformation temperature of the memory alloy is set within the range of 40-70 ℃, and the clamping hoop 30 is in an expanded state when the temperature of the clamping hoop 30 is lower than the transformation temperature; in a state where the temperature of the clip 30 is higher than the transformation temperature, the clip 30 is in a clamped state.

Generally, the metamorphosis temperature is selected to be between 40 ℃ and 70 ℃, because if the metamorphosis temperature is lower than 40 ℃, the ambient temperature of the wire clamping portion 232 and the clip 30 can also reach approximately 40 ℃ under the condition of no conducting current, at this time, the clip 30 is in a clamping state, the gap of the wire clamping portion 232 becomes small, the flat terminal 113 cannot be inserted into the wire clamping portion 232, and the insertion structure of the flat terminal 113 and the wire clamping portion 232 cannot be inserted, so that the work cannot be performed.

In some embodiments, the clamping portion 232 is sleeved with a clamping hoop 30, the clamping hoop 30 includes a side wall 31 and an elastic unit 32 fixed on the side wall 31, and the elastic unit 32 is in contact connection with the outer side of the clamping portion 232.

The clip 30 applies pressure to the wire clamping portion 232 through the elastic unit 32 disposed on the sidewall, so that the strip-shaped groove of the wire clamping portion 232 can clamp the flat terminal 113 of the flat belt 11, thereby ensuring the contact area between the wire clamping portion 232 and the flat terminal 113, reducing the contact resistance, and improving the conductivity.

The provision of the clip 30 ensures that the crimping portion 232 is tightly connected to the flat terminal 113.

Further, the force applied to the wire clamping portion 232 by the elastic unit 32 ranges from 3N to 200N.

In order to verify the influence of the pressure applied by the elastic unit 32 to the wire clamping part 232 on the contact resistance and the plugging and unplugging condition of the flat terminal 113 with larger eccentricity after plugging, the inventor selects the flat wire core 111 and the wire clamping part 232 with the same dimension and specification, selects different pressures applied by the elastic unit 32 to the wire clamping part 232, then selects the flat terminal 113 and the wire clamping part 232 with the same eccentricity for plugging, and respectively tests the contact resistance between the terminals after plugging, and tests the successful plugging proportion of the flat terminal 113 in a plurality of plugging and unplugging experiments, wherein the test results are shown in table 7.

The contact resistance test method comprises the following steps: using the micro resistance meter, the measuring end of the micro resistance meter is placed on the flat terminal 113 and the wire clamping terminal 213 at the same position for each measurement, and then the contact resistance reading on the micro resistance meter is read. In this example, a contact resistance of more than 1m Ω is not acceptable.

The method for testing the plug success rate comprises the following steps: the amount of pressure applied to the pinch portion 232 by each spring unit 32 is registered against 100 flat terminals 113 of the same eccentricity, and the number of successful insertions is recorded as a ratio to the total number multiplied by 100%. In the present embodiment, the success rate of the pair insertion is less than 95%.

Table 7: effect of different pressures on contact resistance and on insertion success rates

As can be seen from table 7, when the pressure applied to the pinching portion 232 by the elastic unit 32 is less than 3N, although the success rate of the opposite insertion is acceptable, the contact resistance between the opposite insertion terminal 23 and the pinching portion 232 is greater than 1m Ω, and the contact resistance is excessively large; when the pressure applied to the clamping portion 232 by the elastic unit 32 is greater than 200N, the insertion success rate is less than 95%, and the application requirement cannot be met, so the inventors set the pressure applied to the clamping portion 232 by the elastic unit 32 to be 3N-200N.

Furthermore, the elastic unit 32 is an elastic rubber body, a spring or a metal spring. The elastic unit 32 may be an elastic rubber body, and the pressure applied to the wire clamping part 232 is ensured by the elastic force compressed by the elastic rubber body; the elastic unit 32 may be a compression spring, which guarantees a pressure applied to the wire clamping part 232 by virtue of an elastic force compressed by the compression spring; the elastic unit 32 may also be a metal elastic sheet, which is integrally formed with the clip 30, and may be in the form of a single-ended elastic sheet with one end fixed and one free end, or a double-ended elastic sheet with both ends fixed and a middle protrusion, and the pressure applied to the wire clamping portion 232 is ensured by the elasticity of the metal elastic sheet.

In one embodiment, the wire clamping portion 232 of the opposite plug terminal 23 is formed by stacking a plurality of sheet terminals 234, and the sheet terminals 234 are formed with grooves for matching and opposite plug connection with the flat ribbon 11. The flat terminal 113 can be inserted into the groove and electrically connected with the wire clamping portion 232, the flat terminal 113 of the flat belt 11 is clamped through the groove, the flat belt 11 and the opposite insertion terminal 23 are fixed together, a large contact area is formed between the flat belt 11 and the opposite insertion terminal 23, and the reliability of electrical connection is guaranteed. The width of the groove or the number of the sheet-shaped terminals 234 is adjusted to control the clamping force, so that the flat-type terminals 113 can be conveniently matched with the clamping force, and various plug-in requirements are met.

As shown in fig. 5, the mating terminal 23 is formed by stacking a plurality of tab terminals 234, the tab terminals 234 are easily deformed and can be mated with the flat terminals 113 of the flat ribbon 11, the flat terminals 113 of the flat ribbon 11 are in contact with the grooves of the tab terminals 234 to achieve electrical connection, and the stability of connection between the mating terminal 23 and the flat ribbon 11 can be ensured.

Specifically, the wire clamping portion 232 is formed by stacking a plurality of layers of the sheet-like terminals 234, and a groove is formed in the sheet-like terminal 234, and the groove is inserted into and electrically connected with the flat terminal 113 of the flat ribbon 11.

In some embodiments, the gap between two adjacent blade terminals 234 is less than 0.2 mm. A gap is formed between the two sheet-shaped terminals 234, and one purpose is that air circulation exists between the sheet-shaped terminals 234, so that the temperature rise between the flat terminal 113 and the opposite plug terminal 23 can be reduced, the conductive anti-corrosion layer of the flat terminal 113 is protected, the service life of the flat terminal 113 is prolonged, and the plug force between the flat terminal 113 and the opposite plug terminal 23 is ensured. When the gap is larger than 0.2mm, the heat dissipation function is not increased, but the opposite plug terminal 23 with the same contact area occupies larger width, and the use space is wasted.

In some embodiments, the blade terminal 234 is made of a memory alloy at least partially. As previously mentioned, a memory alloy is a smart metal with memory, the microstructure of which has two relatively stable states, at high temperatures the alloy can be brought into any desired shape, at lower temperatures the alloy can be stretched, but if it is reheated it remembers its original shape and returns, the crystal structure of the memory alloy above and below its transformation temperature is different, but when the temperature is changed above and below the transformation temperature the memory alloy contracts or expands, causing its form to change. In some embodiments, the memory alloy is a nickel titanium alloy.

Further, the transformation temperature of the memory alloy is set within the range of 40 ℃ to 70 ℃, and the plurality of grooves are in an expanded state in a state that the temperature of the sheet-like terminal 234 is lower than the transformation temperature; in a state where the temperature of the blade terminal 234 is higher than the transformation temperature, the plurality of grooves are in a clamped state.

Generally, the transformation temperature is set within a range of 40 ℃ to 70 ℃, because if the transformation temperature is lower than 40 ℃, the ambient temperature of the plug terminal 23 can also reach approximately 40 ℃ under the condition of no conducting current, at this time, the plurality of sheet terminals 234 are in a clamping state, the grooves of the plug terminal 23 become small, the flat terminal 113 cannot be inserted into the plug terminal 23, and the plug structure of the flat terminal 113 and the plug terminal 23 cannot be plugged, and thus cannot work.

At room temperature, the flat terminal 113 and the plug terminal 23 start to conduct electricity after being plugged, and since the plurality of sheet terminals 234 are in an expanded state just before the plugging, the contact area between the flat terminal 113 and the plug terminal 23 is small, the current is large, so that the temperature of the plugged sheet terminals 234 starts to rise, if the metamorphic temperature is higher than 70 ℃, the temperature rise time of the plug terminal 23 is long, the plugging structure of the flat terminal 113 and the plug terminal 23 is in a large current state for a long time, electrical aging is easily caused, and in serious cases, the plugging structure of the flat terminal 113 and the plug terminal 23 is overloaded and damaged, and unnecessary loss is caused.

Therefore, in general, the transformation temperature of the memory alloy is set to be between 40 ℃ and 70 ℃.

The plug-in terminal 23 has a memory function, when the temperature is below the abnormal temperature, the groove of the plug-in terminal 23 is usually in an expanded state, and the flat terminal 113 of the flat belt 11 can realize butt joint without insertion force, so that the electric appliance can be easily plugged by an operator. During operation, current is conducted to the plug terminal 23, the temperature of the plug terminal 23 is gradually increased due to the effect of the resistor, when the temperature is increased to be higher than the abnormal temperature, the groove of the plug terminal 23 can be radially contracted, the contact area and the contact force of the groove of the plug terminal 23 and the flat terminal 113 of the flat band 11 are increased through the increase of the temperature, the contact reliability is improved, the operation is easier due to the fact that the requirement of the insertion force is omitted, and the work efficiency is improved.

In one embodiment, the female housing 22 is integrally injection molded around at least a portion of the periphery of the opposing terminals 23 to form an insulative structure. The connecting mechanism in the embodiment is provided with the injection molded female end shell 22, is simple to process and low in cost, and can be directly injected outside the plug-in terminal 23 for insulation.

In one embodiment, the female connection mechanism 20 further includes a cable 21 electrically connected to the mating terminal 23, the mating terminal 23 and at least a portion of the cable 21 are disposed within the female housing 22, and the mating terminal 23 is at least partially exposed outside the female housing 22. By the cable 21 connected to the mating terminal 23 and the electrical connection between the mating terminal 23 and the flat terminal 113, the flat ribbon 11 and the cable 21 can be electrically connected to conduct a circuit and conduct a current.

In one embodiment, the wire clamping portion 232 at least partially protrudes from the outer wall of the female housing 22, or the female housing 22 is provided with an opening boss, and the wire clamping portion 232 is at least partially disposed in the opening boss. In the above embodiment, the flat terminal 113 is provided protruding from the male housing 12, and can be connected to the wire clamping portion 232 provided in the opening boss by mating insertion. Alternatively, the male housing 12 has a recess, and the flat terminal 113 protrudes from the bottom of the recess but does not protrude beyond the male housing 12, and can be inserted into the wire clamping portion 232 protruding from the outer wall of the female housing 22.

In one embodiment, as shown in fig. 8, the female connection mechanism 20 has a high voltage interlock 24, and the high voltage interlock 24 is electrically connected to the interlock connector 14 to form a circuit. The high-voltage interlock is a safety design method for monitoring the integrity of a high-voltage loop by using a low-voltage signal, and the high-voltage interlock is used for monitoring the accidental disconnection of the high-voltage loop so as to avoid the damage to an automobile caused by sudden loss of power. In the high-voltage interlock of this embodiment, as shown in fig. 13, one end is an interlock connector 14, in order to have two pairs of pins, and two U-shaped or V-shaped low-voltage circuits electrically connected to the pins, and the other end is disposed in the female end connecting mechanism 20 and connected to two plug terminals of the low-voltage circuit, and the plug terminal of the high-voltage interlock structure 24 is connected to the pair pins of the interlock connector 14 in a matching manner to form a low-voltage monitoring circuit, and when the connecting mechanism in this embodiment is accidentally disconnected, the interlock connector 14 and the high-voltage interlock structure 24 are also simultaneously disconnected, and the low-voltage monitoring circuit will alarm the central control system, so that the vehicle will not be damaged due to sudden loss of power.

The embedded high-voltage interlocking structure 24 replaces the prior assembled high-voltage interlocking, is fixed in the connector in an integrated injection molding mode, does not need to be assembled, reduces the cost and completely meets the high-voltage interlocking effect.

In one embodiment, the female end coupling mechanism 20 and/or the male end coupling mechanism 10 have a sealing structure 40. The sealing structure 40 can seal the flat terminal 113, the opposite plug terminal 23, part of the flat belt 11 and the cable 21 into the connecting mechanism, prevent external dust and water from damaging and corroding the internal conducting mechanism, and greatly prolong the service life of the connecting mechanism.

Further, the seal structure 40 is over-molded on the female housing 22 and/or the male housing 12. The sealing structure 40 of the connecting mechanism is not provided with an independent sealing ring, but adopts the secondary injection molding sealing structure 40 instead of the traditional sealing ring, can be directly molded on the connecting mechanism, and has better injection molding combination property and reduced cost.

Further, the sealing structure 40 is made of rubber, soft glue or silica gel. The materials are selected, the materials can be heated and melted by an injection molding machine and are molded in a corresponding injection mold, the processing is simple, the adhesion is firm, the service life of the sealing structure 40 can be greatly prolonged, in addition, the materials have good elasticity, the materials can be extruded and deformed during the assembly of a connecting mechanism, the good sealing performance is realized in the filled gap, the materials are water-resistant and oil-resistant, and the sealing structure 40 can be ensured to have longer service life and safe sealing performance.

Further, the maximum clearance of the sealing structure 40 with the male end connection 10 and/or the female end connection 20 is less than 520 nm.

In order to verify the influence of the size of the gap between each sealing structure 40 and an adjacent device on the sealing grade, the inventor tests the sealing device by using a dry air method, controls the difference between the internal pressure and the external pressure of a tested sample by vacuumizing or pressurizing air, and reduces the difference between the internal pressure and the external pressure if leakage exists. The tightness can be detected by detecting a change in air pressure. The detection medium is dry air, is non-toxic and harmless, does not damage the detected product, and simultaneously has clean and tidy detection environment. Taking the example of setting the sealing structure 40 on the male end connecting mechanism for detection, the inventor completely seals other joints after connecting the male end connecting mechanism 10 and the female end connecting mechanism 20, selects the sealing structures 40 with different sealing degrees, extracts the dry air part in the sealing structure 40, makes the air pressure in the sealing structure 40 lower than the external air pressure, continuously detects the internal air pressure of the sealing structure 40, finds that the air pressure is unqualified when the air pressure is increased, and the test result is shown in table 8.

TABLE 8 Effect of maximum clearance of seal 40 from male end connection 10 and/or female end connection 20 on air pressure changes

Maximum gap (nm)	530	520	500	450	400	350	300	280	260
										Whether the air pressure is changed	Is that	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not

As can be seen from table 8, when the maximum clearance between the seal structure 40 and the male end connection 10/and/or the female end connection 20 exceeds 520nm, the gas pressure changes, which means that gas enters the seal structure 40, and the test is failed. The inventors chose that the maximum clearance of the sealing structure 40 from the male end connection 10 and/or the female end connection 20 is not less than 520 nm.

In one embodiment, the female and/or

male connectors

20, 10 have at least one temperature measurement structure for measuring the temperature of the opposing terminals 23 and/or the ribbon 11 and/or the ribbon terminals 113. The temperature measuring structure can have a certain distance with the plug-in terminal 23 and/or the flat belt 11, the heat radiation of the plug-in terminal 23 and/or the flat belt 11 is transmitted to the temperature measuring structure, the temperature measuring mechanism measures the temperature of the plug-in terminal 23 and/or the flat belt 11, or the temperature measuring structure comprises a conducting element, the conducting element is attached to the plug-in terminal 23 and/or the flat belt 11, and the temperature of the plug-in terminal 23 and/or the flat belt 11 is measured through the temperature transmitted by the conducting element. And transmitted to a control system for regulating the current passing through the opposite plug terminal 23 and/or the flat band 11, thereby regulating the temperature of the female connection mechanism 20 or the male connection mechanism 10.

Furthermore, the temperature measuring structure is attached to the inserted terminal 23 and/or the flat belt 11 and/or the flat terminal 113 and is used for measuring the temperature of the inserted terminal 23 and/or the flat belt 11 and/or the flat terminal 113. The temperature measuring structure is a temperature sensor, the oppositely inserted terminal 23 and/or the flat belt 11 and/or the flat terminal 113 are/is directly attached, the actual temperature of the oppositely inserted terminal 23 and/or the flat belt 11 and/or the flat terminal 113 can be directly obtained, the actual temperature of the oppositely inserted terminal 23 and/or the flat belt 11 and/or the flat terminal 113 does not need to be obtained through calculation, the structure is simple, and the temperature measurement is more accurate.

In one embodiment, the male end connection 10 has at least one temperature measuring structure, at least two straps 11, between the straps 11 for measuring the temperature of the straps 11. The temperature measurement structure is placed between the bandlets 11, can obtain the heat that many bandlets 11 conduct simultaneously, can balance the calorific capacity of many bandlets 11, not only saves the quantity of temperature measurement structure, also can directly obtain the highest temperature of many bandlets 11, can play good effect to the temperature control of bandlet 11.

The temperature measuring structure can be a temperature sensor which can be an NTC temperature sensor or a PTC temperature sensor, and the temperature of the male end connecting mechanism 10 or the female end connecting mechanism 20 can be timely and accurately monitored.

The temperature sensor is an NTC temperature sensor or a PTC temperature sensor. The two temperature sensors have the advantages of small volume and capability of measuring gaps which cannot be measured by other thermometers; the use is convenient, and the resistance value can be randomly selected from 0.1-100 k omega; the cable connector is easy to process into a complex shape, can be produced in large batch, has good stability and strong overload capacity, and is suitable for a product with small requirement on volume and stable performance, such as an adapter.

Adopt temperature measurement mechanism, can monitor the inside terminal temperature of coupling mechanism alone, avoid because the temperature sensor of other positions damages, and can't monitor coupling mechanism's temperature.

Further, the male end connection mechanism 10 and the female end connection mechanism 20 are connected by one or more of adhesive connection, magnetic attraction connection, bayonet connection, plug connection, latch connection, bundling connection, threaded connection, rivet connection, and welding connection.

In a first possible technical solution, an adhesive structure may be adopted, for example, adhesive layers are respectively disposed on the surfaces to be spliced of the male end connecting mechanism 10 and the female end connecting mechanism 20, and the two are fixedly connected by adhesion.

In a second possible technical solution, a magnetic attraction structure may be adopted, for example, magnetic attraction members are also disposed on the surfaces to be spliced of the male end connecting mechanism 10 and the female end connecting mechanism 20, and the connection is convenient and fast.

In a third possible technical solution, a plug-in structure may be adopted, a plug is disposed on a housing of the male end connecting mechanism 10, a slot is disposed on a surface of a housing of the female end connecting mechanism 20, and the plug is fixedly connected after being inserted into the slot, so that the male end connecting mechanism 10 is fixedly connected with the female end connecting mechanism 20, and the male end connecting mechanism 10 is connected with the female end connecting mechanism 20.

In a fourth possible technical solution, a clamping structure may be adopted, for example, a buckle is arranged on the male end shielding shell 14 of the male end connecting mechanism 10, a clamping groove is arranged on the female end of the female end connecting mechanism 20, and the buckle and the clamping groove are fixedly connected after being assembled, so that the male end connecting mechanism 10 and the female end connecting mechanism 20 are fixedly connected.

In a fifth possible technical solution, a bolt connection structure may be adopted, where the bolt connection structure includes a bolt and a nut, the bolt is fixed on the surface to be spliced of the male end connection mechanism 10, and the nut is arranged on the surface to be spliced of the female end connection mechanism 20 and can rotate; after the bolt and the nut are screwed and tightened, the surfaces to be spliced of the male end connecting mechanism 10 and the female end connecting mechanism 20 are fixedly connected. The bolt connection structure adopts a bolt and a nut with minimum M3, and the torque when the bolt connection structure is screwed down is minimum 0.2 N.m.

In a sixth possible technical solution, a riveting structure may be adopted, where the riveting structure includes a rivet and a fixing hole, the fixing hole is disposed on the surface to be spliced of the male end connection mechanism 10 and the female end connection mechanism 20, the rivet passes through the fixing hole, and deforms the end through which the rivet passes, so that the fixing hole is tightened, and the surface to be spliced of the male end connection mechanism 10 and the female end connection mechanism 20 is fixedly connected.

In a seventh possible technical solution, a welding structure may be adopted, for example, a welding part is disposed on the surfaces to be spliced of the male end connecting mechanism 10 and the female end connecting mechanism 20, and the welding part is melted and connected together by using a welding machine, so that the surfaces to be spliced of the male end connecting mechanism 10 and the female end connecting mechanism 20 are fixedly connected. The welding machine includes a heat fusion welding machine and an ultrasonic welding machine.

In an eighth possible technical solution, a bundling structure may be adopted, where the bundling structure includes a bundling member, a groove is provided on the surface of the male end connecting mechanism 10 and the female end connecting mechanism 20, and the bundling member is used to bundle the surfaces to be spliced of the male end connecting mechanism 10 and the female end connecting mechanism 20 together at the groove position, so as to fixedly connect the splicing surfaces of the male end connecting mechanism 10 and the female end connecting mechanism 20. The strapping includes a strap, a pipe clamp, a hook lock, etc.

In a ninth feasible technical solution, a locking structure may be adopted, where the locking structure includes a locking element, the locking element is disposed at a position adjacent to or on a surface to be spliced of the male end connecting mechanism 10 and the female end connecting mechanism 20, and the splicing surface of the male end connecting mechanism 10 and the female end connecting mechanism 20 is fixedly connected through the locking element.

In one embodiment, the mating terminal 23 includes a clamping portion 232, the flat terminal 113 is electrically connected to the clamping portion 232 in a mating manner, and a mating force between the flat terminal 113 and the clamping portion 232 is between 3N and 150N.

In order to verify the influence of the insertion force between the flat terminal 113 and the wire clamping portion 232 on the contact resistance between the flat ribbon 11 and the insertion terminal 23 and the insertion condition, the inventor selected the flat ribbon 11 and the insertion terminal 23 having the same shape and size, and designed the insertion force between the flat ribbon 11 and the insertion terminal 23 to be different insertion forces to observe the contact resistance between the flat ribbon 11 and the insertion terminal 23 and the condition after a plurality of times of insertion.

The contact resistance is detected by measuring the resistance at the contact position between the flat terminal 113 and the wire clamping portion 232 using a micro resistance measuring instrument, and reading the value on the micro resistance measuring instrument as the contact resistance between the flat terminal 113 and the wire clamping portion 232, and in this embodiment, the contact resistance is smaller than 50 μ Ω, which is a desirable value.

The test mode of the mutual insertion condition of the flat terminal 113 and the wire clamping part 232 is to perform mutual insertion of the flat terminal 113 and the wire clamping part 232 for 50 times, observe the times of dropping and incapability of plugging after plugging, wherein the dropping time requirement after plugging is less than 3 times, and the time requirement of incapability of plugging is less than 5 times.

Table 9, influence of the insertion force between different flat terminals 113 and the wire clamping portion 232 on the contact resistance and the insertion condition:

as can be seen from table 9 above, when the insertion force between the flat terminal 113 and the wire clamping portion 232 is smaller than 3N, the bonding force between the flat terminal 113 and the wire clamping portion 232 is too small, the contact resistance between the flat terminal and the wire clamping portion 232 is higher than an ideal value, and the number of times of dropping after insertion exceeds 3 times, which is an unqualified state. When the insertion force between the flat terminal 113 and the wire clamping portion 232 is larger than 150N, the number of times the flat terminal 113 and the wire clamping portion 232 cannot be inserted and removed is larger than 5 or more, and the insertion force between the flat terminal 113 and the wire clamping portion 232 is set to be 3N to 150N.

As can be seen from table 9 above, when the insertion force between the flat terminal 113 and the wire clamping portion 232 is between 10N and 130N, the contact resistance value is within the ideal value range without dropping after insertion and removal or without being unable to be inserted and removed, and therefore, the inventors set that the insertion force between the flat terminal 113 and the wire clamping portion 232 is preferably between 10N and 135N.

In one embodiment, the contact resistance between the flat terminal 113 and the opposite insertion terminal 23 is less than 9m Ω. Preferably, the contact resistance between the flat terminal 113 and the opposite insertion terminal 23 is less than 1m Ω. Generally, a large current needs to be conducted between the flat terminal 113 and the opposite plug terminal 23, if the contact resistance between the flat terminal 113 and the opposite plug terminal 23 is greater than 9m Ω, a large temperature rise occurs at the contact position, and the temperature becomes higher and higher with the increase of time, so that the temperature between the flat terminal 113 and the opposite plug terminal 23 is too high, which may cause an internal stress between the conductive anti-corrosion layer and the flat terminal 113, and between the opposite plug terminal 23 and the terminal plating layer, and between the conductive anti-corrosion layer and the flat terminal 113, and between the opposite plug terminal 23 and the terminal plating layer, due to different materials and different thermal expansion rates, the mechanical deformation is asynchronous, which may cause an internal stress between the conductive anti-corrosion layer and the flat terminal 113, and the opposite plug terminal 23 and the terminal plating layer to fall off in a serious case, and the protection effect cannot be achieved. Secondly, the excessive temperature of the flat terminal 113 and the opposite plug terminal 23, or the insulation layer conducted to the flat belt 11, and the insulation layer of the wire connected to the opposite plug terminal 23, cause the corresponding insulation layer to melt, which cannot play the role of insulation protection, and in severe cases, may cause the circuit short circuit to cause the damage of the connection structure, even the safety accident such as burning. Therefore, the inventors set the contact resistance between the flat terminal 113 and the opposite insertion terminal 23 to be less than 9m Ω.

In order to verify the influence of the contact resistance between the flat terminal 113 and the opposite plug terminal 23 on the temperature rise and conductivity of the connection mechanism, the inventor selected the same flat belt 11 and the opposite plug terminal 23 with different contact resistances, and performed the test of the conductivity and temperature rise of the opposite plug structure.

The electrical conductivity test is to test the electrical conductivity of the corresponding mating part after the flat terminal 113 is mated with the mating terminal 23 and the mating structure is energized, and in this embodiment, the electrical conductivity is greater than 99% as an ideal value.

The temperature rise test is to apply the same current to the plug structure, detect the temperatures of the flat terminal 113 and the plug terminal 23 at the same position before applying the current and after stabilizing the temperature in a closed environment, and take the absolute value of the difference. In this example, a temperature rise greater than 50K is considered unacceptable.

Table 10, influence of contact resistance between different flat terminals 113 and the opposite insertion terminal 23 on conductivity and temperature rise:

as can be seen from the above table 10, when the contact resistance between the flat terminal 113 and the opposite-insertion terminal 23 is greater than 9m Ω, the temperature rise of the insertion structure exceeds 50K, and meanwhile, the electrical conductivity of the insertion structure is also less than 99%, which does not meet the standard requirement. Therefore, the inventors set the contact resistance between the flat terminal 113 and the opposite insertion terminal 23 to be less than 9m Ω. Meanwhile, the inventor finds that when the contact resistance is less than 1m Ω, the temperature rise amplitude is further reduced remarkably, and the conductivity is also high, so that the contact resistance between the flat terminal 113 and the plug terminal 23 is preferably less than 1m Ω in the utility model.

In one embodiment, the number of plugging and unplugging between the male end connecting mechanism 10 and the female end connecting mechanism 20 is greater than or equal to 9, when the connecting mechanism is assembled with the electric device, the male end connecting mechanism 10 and the female end connecting mechanism 20 need to be assembled together, and subsequent maintenance and assembly disassembly are performed, and plugging and unplugging may be performed after the male end connecting mechanism 10 and the female end connecting mechanism 20 are separated, so the number of plugging and unplugging between the male end connecting mechanism 10 and the female end connecting mechanism 20 cannot be less than 9, if the number of plugging and unplugging is less than 9, the male end connecting mechanism 10 or the female end connecting mechanism 20 may be damaged and cannot play a role of current in a certain disassembly and maintenance process, the whole connecting mechanism including the wiring harness needs to be completely replaced, which not only consumes maintenance time, but also increases maintenance cost, therefore, no matter the material selection of the male end connecting mechanism 10 and the female end connecting mechanism 20, the design of the plugging mechanism, the locking mechanism and the sealing mechanism between the male end connecting mechanism 10 and the female end connecting mechanism 20 can meet the use requirement of the connecting mechanism after at least 9 times of disassembly and assembly.

In one embodiment, the male end coupling mechanism 10 has a weight of 305g or less. As shown in fig. 1, the male end connector is located above the connection mechanism and is fixedly inserted into the female end connection mechanism 20, when the weight of the male end connection mechanism 10 is too large, the gravity received by the female end connection mechanism 20 is also large, and under the condition of vibration of the electric device, the whole connection mechanism can vibrate along with the vibration, due to the reason of inertia, the male end connection mechanism 10 can vibrate greatly and send out abnormal sound, and the abnormal sound is not allowed in the use process of the electric device.

In order to verify the influence of the weight of the male end connecting mechanism 10 on the abnormal sound of the connecting mechanism, the inventor adopts the same female end connecting mechanism 20, assembles sample pieces of the male end connecting mechanisms 10 with different weights, installs the sample pieces on a vibration test bench, performs a vibration test, and observes whether the abnormal sound of the male end connecting mechanism 10 occurs in the vibration test process, and the test result is shown in table 11.

TABLE 11 influence of weight of male end coupling 10 on the coupling noise

Weights (g)	265	275	285	295	305	315	325	335	345
										Whether abnormal sound is present or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Is that	Is that	Is that	Is that

As can be seen from table 11, when the weight of the male-end connection mechanism 10 is greater than 305g, abnormal noise occurs in the male-end connection mechanism 10 during the vibration test, and the test is not qualified. The inventor chooses the male end connection mechanism 10 to have a weight of 305g or less.

In one embodiment, the height of the male end connection mechanism 10 along the plugging direction is less than or equal to 108 mm. After the male end connection mechanism 10 and the female end connection mechanism 20 are assembled together, the male end connection mechanism needs to be installed in an electric device, but in general, the space reserved for the electric device is small, and if the male end connection mechanism 10 is high, the male end connection mechanism cannot be installed in the electric device, and raw materials are wasted, so that the male end connection mechanism 10 needs to be lower than a certain height during design.

In order to verify the influence of the height of the male end connecting mechanism 10 along the plugging direction on the installation condition of the connecting mechanism, the inventor adopts the same female end connecting mechanism 20, assembles sample pieces of the male end connecting mechanism 10 with different heights along the plugging direction and installs the sample pieces on the electric device, observes whether the male end connecting mechanism 10 interferes with other parts of the electric device in the installation process, and the test result is shown in table 12.

TABLE 12 influence of height of male-end connection 10 in plugging-unplugging direction on connection installation

Height (mm)	68	78	88	98	108	118	128	138	148
										Whether or not to interfere	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Is that	Is that	Is that	Is that

As can be seen from table 12, when the height of the male terminal connecting mechanism 10 in the inserting and extracting direction is greater than 108mm, the male terminal connecting mechanism cannot be mounted in the specified position of the electric device, and the test is not qualified. The height of the male end connecting mechanism 10 along the plugging direction is less than or equal to 108 mm.

The utility model also provides an electric energy transmission device, electric energy transmission device contain above-mentioned coupling mechanism.

The utility model also provides a motor vehicle, motor vehicle contain above-mentioned coupling mechanism and electric energy transmission device.

The utility model discloses a coupling mechanism sets up injection moulding's public end shell 12, and processing is simple, and the cost is lower, can directly mould plastics and insulating among bandlet 11, can reduce the installation of bandlet 11 to can be multiple shape according to the demand shaping with bandlet 11 front end, and need not consider the problem of assembly, save manufacturing procedure, reduce the processing cost.

The utility model discloses a coupling mechanism, 11 range upon range of settings of bandlet to set up suitable interval, can effectually reduce the electromagnetic interference that causes other spare parts after 11 circular telegrams of bandlet, thereby reach cancellation high-voltage charging wire bundle shielding layer structure, reach the demand that reduces cost, reduce weight.

The flat belt 11 can be made of a material containing aluminum or aluminum alloy, is lighter in weight and lower in price, and can better meet the requirements of energy conservation, emission reduction and cost reduction of motor vehicles.

The flat belt 11 can be used as the flat terminal 113 without independently manufacturing the flat terminal 113, and only by bending the front end of the flat wire core 111 and then chamfering the front end of the flat wire core, the flat terminal 113 can be used, the processing cost of the flat terminal 113 is saved, the connection between the flat wire core 111 and the flat terminal 113 is reduced, the voltage drop of the flat belt 11 is reduced, and the mechanical performance and the electrical performance of the connecting mechanism are improved.

In the connection between the flat terminal 113 and the opposite plug terminal 23, the conductive anti-corrosion layer can reduce the electrochemical reaction between the flat terminal 113 of the flat belt 11 and the opposite plug terminal 23, and solve the technical problem that the flat belt 11 can be connected with other terminals or electric devices only through copper terminals.

The plug-in terminal 23 is formed by stacking a plurality of sheet terminals 234, the sheet terminals 234 are easy to deform and can be plugged with the flat terminals 113 of the flat belt 11, the flat terminals 113 of the flat belt 11 are in contact with the strip-shaped grooves of the sheet terminals 234, so that electric connection is realized, and the stability of connection between the plug-in terminal 23 and the flat belt 11 can be guaranteed.

The plug-in terminal 23 has a memory function, when the temperature is lower than the abnormal temperature, the strip-shaped groove of the plug-in terminal 23 is usually in an expanded state, and at the moment, the flat terminal 113 of the flat belt 11 can realize butt joint without insertion force, so that an operator can conveniently plug an electric appliance easily. During operation, current is conducted on the plug terminal 23, the temperature of the plug terminal 23 gradually rises due to the effect of the resistor, when the temperature rises to be higher than the abnormal temperature, the strip-shaped groove of the plug terminal 23 radially shrinks, the contact area and the contact force of the strip-shaped groove of the plug terminal 23 and the flat terminal 113 of the flat strip are increased through the rise of the temperature, the contact reliability is improved, the operation is easier due to the fact that the requirement of the insertion force is omitted, and the work efficiency is improved.

The embedded high-voltage interlocking structure 24 replaces the prior assembled high-voltage interlocking, is fixed in the connecting mechanism in an integrated injection molding mode, does not need to be assembled, reduces the cost and completely meets the high-voltage interlocking effect.

The sealing structure of the connecting mechanism is not provided with an independent sealing ring, but adopts a secondary injection molding sealing structure to replace the traditional sealing ring, can be directly molded on the connecting mechanism, and has better injection molding combination property and reduced cost.

The above description is only for the embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a connecting mechanism, includes public end coupling mechanism and female end coupling mechanism, its characterized in that, public end coupling mechanism include bandlet, flat terminal and with the bandlet with the public end shell that flat terminal is connected, female end coupling mechanism include to the spigot terminal and with the female end shell that the spigot terminal is connected, public end coupling mechanism with female end coupling mechanism passes through the flat terminal with the spigot terminal electricity is connected, public end shell with female end shell is connected, forms coupling mechanism.

2. The attachment mechanism of claim 1 wherein the cross-section of the flat ribbon has an aspect ratio of 1:1 to 120: 1.

3. The connection according to claim 1 wherein there are at least two of said strips, said strips being stacked one on top of the other, said male housing being integrally injection molded around at least a portion of said strips and said blade terminals to form an insulative structure.

4. The coupling mechanism of claim 1, wherein the flat ribbon includes a flat wire core and an outer insulation layer partially stripped to expose the flat wire core, the outer insulation layer terminating within or abutting the male end housing.

5. The connection according to claim 1, wherein the flat ribbon comprises a flat wire core having a hardness of 8HV-105 HV.

6. The connecting mechanism according to claim 1, wherein the number of the flat belts is at least two, the flat belts are stacked one on top of the other, the flat belts comprise flat wire cores, and the vertical distance between the two flat wire cores is less than or equal to 27 cm.

7. The connection mechanism according to claim 6, wherein the vertical distance between two flat wire cores is less than or equal to 7 cm.

8. The connection according to claim 1, wherein there are at least two ribbons, said ribbons being stacked one on top of the other, said ribbons comprising flat wire cores, said flat wire cores having a degree of overlap in the stacking direction of 40% to 100%.

9. The connection mechanism of claim 1, wherein the ribbon comprises a flat wire core, a front end of the flat wire core is connected to the flat terminal, and the male housing covers at least a portion of the flat terminal.

10. The connection mechanism of claim 1, wherein the ribbon comprises a flat wire core, the flat wire core and the flat terminal being of a unitary construction.

11. The connection mechanism of claim 1 wherein said blade terminal at least partially protrudes from said male end housing or said male end housing has a receiving cavity and said blade terminal at least partially protrudes from a bottom surface of said receiving cavity but does not extend beyond said male end housing.

12. The connection mechanism according to claim 1, wherein the flat ribbon comprises a flat wire core, and a bent portion is included between the flat wire core and the flat terminal, and the angle of the bent portion is 0 ° to 180 °.

13. A connection according to claim 1, characterized in that the flat terminals are at least partly provided with an electrically conductive corrosion protection layer.

14. The coupling mechanism of claim 13, wherein the conductive corrosion protection layer has a thickness of 0.3 μm to 3000 μm.

15. The coupling mechanism of claim 14, wherein the conductive corrosion protection layer has a thickness of 2.5 μm to 1000 μm.

16. The connecting mechanism according to claim 1, wherein an end of the flat terminal is provided with a chamfer.

17. The connection mechanism of claim 1 wherein the male end connection mechanism comprises an interlocking connector at least partially integrally molded in the male end housing.

18. The connection mechanism according to claim 1, wherein the mating terminal includes a securing portion and a wire clamping portion, the female terminal connection mechanism further including a cable, the securing portion being electrically connected to the conductive portion of the front end of the cable, the wire clamping portion being electrically connected to the flat terminal.

19. The connecting mechanism of claim 18, wherein a clip is sleeved on the wire clamping portion, and the clip is made of memory alloy.

20. A connection according to claim 19, wherein the memory alloy has a transformation temperature set in the range 40 ℃ to 70 ℃ and the clamp is in an expanded state in a state in which the temperature of the clamp is below the transformation temperature; and under the condition that the temperature of the clamping hoop is higher than the transformation temperature, the clamping hoop is in a clamping state.

21. The connecting mechanism according to claim 18, wherein a clip is sleeved on the wire clamping portion, the clip comprises a side wall and an elastic unit fixed on the side wall, and the elastic unit is in contact connection with the outer side of the wire clamping portion.

22. The coupling mechanism of claim 21, wherein the force applied to the wire clamping portion by the resilient unit is in the range of 3N-200N.

23. The coupling mechanism of claim 21, wherein the resilient unit is an elastic rubber body, a spring, or a metal dome.

24. The connecting mechanism of claim 18 wherein said wire clamping portion of said mating terminal is formed by stacking a plurality of sheet terminals, said sheet terminals having recesses formed therein for mating with said ribbon.

25. The connecting mechanism according to claim 24, wherein a gap between adjacent two of the blade terminals is less than 0.2 mm.

26. The connecting mechanism of claim 24 wherein at least some of the blade terminals are made of a memory alloy.

27. The connection mechanism according to claim 26, wherein a transformation temperature of the memory alloy is set in a range of 40 ℃ to 70 ℃, and in a state where a temperature of the tab terminal is lower than the transformation temperature, the plurality of grooves are in an expanded state; the plurality of recesses are in a clamped state in a state where the temperature of the tab terminal is higher than the transformation temperature.

28. The connecting mechanism of claim 1, wherein the female end housing is integrally injection molded to form an insulative structure around at least a portion of the periphery of the mating terminal.

29. The connection mechanism of claim 1, further comprising a cable electrically connected to the mating terminal, the mating terminal and at least a portion of the cable being disposed within the female housing, the mating terminal being at least partially exposed outside the female housing.

30. The coupling mechanism of claim 18, wherein the wire gripping portion at least partially protrudes from an outer wall of the female housing, or wherein the female housing has an opening boss, and wherein the wire gripping portion is at least partially disposed within the opening boss.

31. The connection mechanism of claim 17, wherein the female end connection mechanism has a high voltage interlock structure that is electrically connected to the interlock connector to form a circuit.

32. The connection according to claim 1, wherein the female end connection and/or the male end connection has a sealing structure.

33. The coupling mechanism of claim 32, wherein the sealing structure is over-molded on the female end housing and/or the male end housing.

34. The connection mechanism of claim 1, wherein the female connection mechanism and/or the male connection mechanism has at least one temperature measurement structure for measuring a temperature of the mating terminal and/or the ribbon terminal.

35. The connecting mechanism of claim 34 wherein said temperature measuring structure is attached to said opposing terminals and/or said ribbon terminals for measuring the temperature of said opposing terminals and/or said ribbon terminals.

36. The connection according to claim 1 wherein said male end connection has at least one temperature measuring structure, said at least two straps being positioned between said straps for measuring the temperature of said straps.

37. The connection mechanism of claim 1, wherein the male connection mechanism and the female connection mechanism are connected by one or more of a paste connection, a magnetic attraction connection, a bayonet connection, a plug connection, a snap connection, a strapping connection, a threaded connection, a rivet connection, and a welded connection.

38. The connecting mechanism of claim 1 wherein said mating terminals include wire clamping portions, said flat terminals are mated with said wire clamping portions to form an electrical connection, and the mating force between said flat terminals and said wire clamping portions is between 3N and 150N.

39. The connection according to claim 38 wherein the mating force between the flat terminals and the wire trap portions is between 10N and 130N.

40. The connection mechanism according to claim 1, wherein a contact resistance between the flat terminal and the opposite insertion terminal is less than 9m Ω.

41. The connection according to claim 40, wherein a contact resistance between the flat terminal and the opposite insertion terminal is less than 1m Ω.

42. The connection mechanism according to claim 1, wherein the number of insertion and removal times between the male connection mechanism and the female connection mechanism is 9 or more.

43. The coupling mechanism of claim 1 wherein the male end coupling mechanism has a weight of 305g or less.

44. The connection mechanism of claim 1, wherein the height of the male end connection mechanism along the plugging direction is less than or equal to 108 mm.

45. An electrical energy transfer device comprising a coupling mechanism according to any one of claims 1 to 44.

46. A motor vehicle, characterized in that it comprises a connection according to any one of claims 1-44.