Flat ribbon type connection mechanism, electric energy transmission device and motor vehicle

Abstract

The application provides a flat ribbon type connecting mechanism, which comprises a male connecting mechanism and a female connecting mechanism, the male connecting mechanism comprises a flat ribbon, a flat terminal and a male shell connected with the flat ribbon and the flat terminal, the female connecting mechanism comprises double flat ribbons, a wire clamping terminal and a female shell connected with the double flat ribbons and the wire clamping terminal, the male connecting mechanism and the female connecting mechanism are electrically connected through the flat terminal and the wire clamping terminal, and the male shell is assembled and connected with the female shell to form the flat ribbon type connecting mechanism. Through the flat ribbon layering arrangement and the appropriate spacing, the electromagnetic interference caused by the flat ribbon after electrification on other components can be effectively reduced, so that the high-voltage charging wire harness shielding layer structure is cancelled, and the purposes of cost reduction and weight reduction are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging, in particular to a flat ribbon type connecting mechanism, an electric energy transmission device and a motor vehicle. BACKGROUND

[0002] The new energy battery of a new energy vehicle uses a charging system to supplement energy. In addition to a charging base, the charging system also has a high-voltage flat ribbon type connecting mechanism connected with a battery system. A charging wire harness is the most important unit in the high-voltage system of an electric vehicle. A traditional charging wire harness uses copper wire as a charging cable. The end of the copper wire is connected with a plug-in terminal and electrically connected with the battery system. The current high-voltage flat ribbon type connecting mechanism is a connector with a complex structure, difficult to assemble, and high in cost. In addition, the use of copper material for the cable and the terminal is high, and the connection processing is complex, which is also the reason for the high cost of the high-voltage flat ribbon type connecting mechanism.

[0003] When a large current passes through the high-voltage charging wire harness, it will cause electromagnetic interference to other components. To avoid such electromagnetic interference, a shielding layer needs to be added outside the high-voltage charging wire harness. This shielding of the high-voltage charging wire harness significantly increases the cost and weight.

[0004] In addition, a temperature measuring structure is usually installed on the charging base of a general charging system, but not on the flat ribbon type connecting mechanism. However, the conduction current is the same. When the temperature of the flat ribbon type connecting mechanism rises, it also needs to be monitored and the charging operation needs to be stopped in time to protect the safety of the charging wire harness and the battery system.

[0005] With the expansion of the market for electric vehicles, there is an urgent need for a flat ribbon type connecting mechanism and an electric energy transmission device with a simple structure and cost advantage. SUMMARY

[0006] The present application aims to provide a flat ribbon type connecting mechanism. The flat ribbon layers are arranged in a stack and are provided with appropriate spacing, which can effectively reduce the electromagnetic interference caused by the conduction of the flat ribbon to other components, thereby achieving the purpose of canceling the shielding layer structure of the high-voltage charging wire harness, reducing the cost and weight.

[0007] The above-mentioned object of the present application can be achieved by using the following technical scheme:

[0008] The present application provides a flat ribbon type connecting mechanism, which comprises a male connecting mechanism and a female connecting mechanism. The male connecting mechanism comprises a flat ribbon, a flat terminal and a male housing connected with the flat ribbon and the flat terminal. The female connecting mechanism comprises double flat ribbons, a wire clamping terminal and a female housing connected with the double flat ribbons and the wire clamping terminal. The male connecting mechanism and the female connecting mechanism are electrically connected through the flat terminal and the wire clamping terminal. The male housing and the female housing are connected to form the flat ribbon type connecting mechanism.

[0009] In preferred embodiments, the aspect ratio of the flat ribbon cross section is 1:1-120:1.

[0010] In preferred embodiments, the aspect ratio of the double flat ribbon cross section is 1:1-120:1.

[0011] In preferred embodiments, the flat ribbon is at least two, stacked vertically, and the male housing is integrally injection molded between at least part of the flat ribbon and / or at least part of the flat terminal and / or forms an insulation structure around the periphery.

[0012] In preferred embodiments, the flat ribbon comprises a first flat wire core and a first outer insulation layer, the first outer insulation layer is partially stripped to expose the first flat wire core, and the end of the first outer insulation layer is in or abuts the male housing.

[0013] In preferred embodiments, the flat ribbon comprises a first flat wire core, and the hardness of the first flat wire core is 8HV-105HV.

[0014] In preferred embodiments, the flat ribbon is at least two, stacked vertically, and the flat ribbon comprises a first flat wire core, and the vertical distance between the two first flat wire cores is less than or equal to 27cm.

[0015] In preferred embodiments, the flat ribbon is at least two, stacked vertically, and the flat ribbon comprises a first flat wire core, and the vertical distance between the two first flat wire cores is less than or equal to 7cm.

[0016] In preferred embodiments, the flat ribbon is at least two, stacked vertically, and the flat ribbon comprises a first flat wire core, and the degree of coincidence of the two first flat wire cores in the stacking direction is 40%-100%.

[0017] In preferred embodiments, the flat ribbon comprises a first flat wire core, the front end of the first flat wire core is connected to the flat terminal, and the male housing covers at least part of the flat terminal.

[0018] In preferred embodiments, the flat ribbon comprises a first flat wire core, and the first flat wire core and the flat terminal are an integral structure.

[0019] In preferred embodiments, the flat terminal at least partially protrudes from the male housing, or the male housing has a receiving cavity, and the flat terminal at least partially protrudes from the bottom surface of the receiving cavity but does not exceed the male housing.

[0020] In a preferred embodiment, the flat ribbon comprises a first flat core, and a first bending portion is comprised between the first flat core and the flat terminal, and an angle of the first bending portion is 0°-180°.

[0021] In a preferred embodiment, the flat terminal is at least partially provided with a first transition layer.

[0022] In a preferred embodiment, the first transition layer has a thickness of 0.3 μm to 3000 μm.

[0023] In a preferred embodiment, the first transition layer has a thickness of 2.5 μm to 1000 μm.

[0024] In a preferred embodiment, an end portion of the flat terminal is provided with a chamfer.

[0025] In a preferred embodiment, the male connection mechanism comprises a interlocking connector, and the interlocking connector is at least partially integrally injection molded in the male housing.

[0026] In a preferred embodiment, the double flat ribbon is at least two, and the double flat ribbon is stacked up and down, and the female housing is integrally injection molded between at least part of the double flat ribbon and / or at least part of the wire clamping terminal and / or forms an insulation structure on the outer periphery.

[0027] In a preferred embodiment, the double flat ribbon comprises a second flat core and a second outer insulation layer, and the second outer insulation layer is partially stripped to expose the second flat core, and an end portion of the second outer insulation layer is in or abuts against the female housing.

[0028] In a preferred embodiment, the double flat ribbon comprises a second flat core, and a hardness of the second flat core is 8 HV-105 HV.

[0029] In a preferred embodiment, the double flat ribbon is at least two, and the double flat ribbon is stacked up and down, and the double flat ribbon comprises a second flat core, and a vertical distance between two of the second flat cores is less than or equal to 27 cm.

[0030] In a preferred embodiment, the double flat ribbon is at least two, and the double flat ribbon is stacked up and down, and the double flat ribbon comprises a second flat core, and a vertical distance between two of the second flat cores is less than or equal to 7 cm.

[0031] In a preferred embodiment, the double flat ribbon is at least two, and the double flat ribbon is stacked up and down, and the double flat ribbon comprises a second flat core, and a coincidence degree of the two of the second flat cores in the stacking direction is 40%-100%.

[0032] In a preferred embodiment, the double flat cable comprises a second flat core, and the second flat core is connected by two flat conductors.

[0033] In a preferred embodiment, the double flat cable comprises a second flat core, and the front end of the second flat core is connected with the clamping terminal, and the female end shell covers at least part of the clamping terminal.

[0034] In a preferred embodiment, the double flat cable comprises a second flat core, and the second flat core is an integral structure with the clamping terminal.

[0035] In a preferred embodiment, the clamping terminal at least partially protrudes from the outer wall of the female end shell, or an open boss is provided on the female end shell, and the clamping terminal is at least partially arranged in the open boss.

[0036] In a preferred embodiment, the double flat cable comprises a second flat core, and a second bending portion is arranged between the front end of the second flat core and the clamping terminal, and the angle of the second bending portion is 0°-180°.

[0037] In a preferred embodiment, a second transition layer is arranged on at least part of the surface of the clamping terminal.

[0038] In a preferred embodiment, the thickness of the second transition layer is 0.3 μm to 3000 μm.

[0039] In a preferred embodiment, the thickness of the second transition layer is 2.5 μm to 1000 μm.

[0040] In a preferred embodiment, an open groove is arranged at the front end of the clamping terminal, and the distance on the open side of the groove is greater than the distance on the closed side of the groove.

[0041] In a preferred embodiment, a clamp is arranged on the clamping terminal, and the material of the clamp is a memory alloy.

[0042] In a preferred embodiment, the metamorphic temperature of the memory alloy is set in the range of 40°C-70°C, and in the state that the temperature of the clamp is lower than the metamorphic temperature, the clamp is in an expanded state; and in the state that the temperature of the clamp is higher than the metamorphic temperature, the clamp is in a clamped state.

[0043] In a preferred embodiment, a clamp is arranged on the clamping terminal, and the clamp comprises a side wall and an elastic unit fixed on the side wall, and the elastic unit is connected with the clamping terminal.

[0044] In a preferred embodiment, the range of the force applied by the elastic unit to the clamping terminal is 3N-200N.

[0045] In preferred embodiments, the elastic unit is an elastic rubber body, a spring or a metal spring.

[0046] In preferred embodiments, the female connection mechanism has a high-voltage interlock structure, which is electrically connected with the interlock connector to form a loop.

[0047] In preferred embodiments, the female connection mechanism and / or the male connection mechanism has a sealing structure.

[0048] In preferred embodiments, the sealing structure is a secondary injection molding on the female housing and / or the male housing.

[0049] In preferred embodiments, the female connection mechanism has at least one temperature measuring structure for measuring the temperature of the double flat cable and / or the crimping terminal.

[0050] In preferred embodiments, the female connection mechanism has at least one temperature measuring structure, which is in contact with the double flat cable and / or the crimping terminal, for measuring the temperature of the double flat cable and / or the crimping terminal.

[0051] In preferred embodiments, the female connection mechanism has at least one temperature measuring structure, and the double flat cable is at least two, the temperature measuring structure is located between the double flat cables for measuring the temperature of the double flat cables.

[0052] In preferred embodiments, the male connection mechanism has at least one temperature measuring structure for measuring the temperature of the flat cable and / or the flat terminal.

[0053] In preferred embodiments, the male connection mechanism has at least one temperature measuring structure, which is in contact with the flat cable and / or the flat terminal, for measuring the temperature of the flat cable and / or the flat terminal.

[0054] In preferred embodiments, the male connection mechanism has at least one temperature measuring structure, and the flat cable is at least two, the temperature measuring structure is located between the flat cables for measuring the temperature of the flat cables.

[0055] In preferred embodiments, the male connection mechanism and the female connection mechanism are connected by one or more of the following methods: adhesive connection, magnetic connection, bayonet connection, plug-in connection, lock connection, bundling connection, threaded connection, rivet connection and welding connection.

[0056] In preferred embodiments, the plug-in force between the flat terminal and the crimping terminal is between 3N and 150N.

[0057] In a preferred embodiment, the insertion force between the flat terminal and the wire clamping terminal is between 10N and 130N.

[0058] In a preferred embodiment, the contact resistance between the flat terminal and the wire clamping terminal is less than 9mΩ.

[0059] In a preferred embodiment, the contact resistance between the flat terminal and the wire clamping terminal is less than 1mΩ.

[0060] In a preferred embodiment, the number of times of plugging between the male connection mechanism and the female connection mechanism is greater than or equal to 9 times.

[0061] In a preferred embodiment, the weight of the male connection mechanism is less than or equal to 305g.

[0062] In a preferred embodiment, the height of the male connection mechanism in the plugging direction is less than or equal to 208mm.

[0063] An electric energy transmission device comprising the flat ribbon connection mechanism of any one of the above.

[0064] A motor vehicle comprising the flat ribbon connection mechanism of any one of the above.

[0065] The features and advantages of the present application are:

[0066] 1. The flat ribbon connection mechanism of the present application is provided with injection molded male and female housings, which is simple to process and low in cost, can be directly injection molded in the flat ribbon and insulated, can reduce the installation cost of the flat ribbon, and can shape the front end of the flat ribbon into various shapes as required without considering the assembly problem, saving processing procedures and reducing processing cost.

[0067] 2. The flat ribbon connection mechanism of the present application is provided with a flat ribbon layer and a proper spacing, which can effectively reduce the electromagnetic interference caused by the flat ribbon after being powered on to other components, thereby achieving the cancellation of the high-voltage charging wire harness shielding layer structure and meeting the requirements of reducing cost and weight.

[0068] 3. In the connection between the flat terminal and the wire clamping terminal, the transition layer can reduce the electrochemical reaction between the flat terminal and the wire clamping terminal of the flat ribbon, solving the technical problem that the flat ribbon needs to be connected to other terminals or electrical devices through a copper terminal.

[0069] 4. The flat ribbon and the flat terminal, and the double flat ribbon and the wire clamping terminal can be integrally formed, through the connection between the flat terminal and the wire clamping terminal, the flat ribbon and the double flat ribbon realize the function of the terminal itself, solving the problem of high cost and low efficiency of the flat ribbon and the double flat ribbon needing to be connected to other terminals, and realizing safe and fast plugging.

[0070] 5. Using clamps to tighten and fix the wire clamp terminals can increase the pressure applied by the wire clamp terminals to the flat terminals, preventing the clamping force of the wire clamp terminals from decreasing due to prolonged use, which would increase the contact resistance between the wire clamp terminals and the flat terminals, leading to increased conduction current and increased temperature of the wire clamp terminals and the flat terminals, and in severe cases, may cause a combustion accident.

[0071] 6. The clamp has a memory function. Below the abnormal temperature, the clamp is usually in an expanded state. At this time, the flat terminal of the flat strip can connect to the clamp terminal without insertion force, making it easy for operators to plug and unplug electrical appliances. During operation, the clamp terminal conducts current. Due to the resistance, the temperature of the clamp terminal and the clamp gradually increases. When the temperature rises above the abnormal temperature, the clamp will radially contract. The increase in temperature increases the contact area and contact force between the clamp terminal and the flat terminal, improving the reliability of the contact. Since the insertion force requirement is eliminated, the work is easier and the work efficiency is improved.

[0072] 7. The embedded high-voltage interlock structure replaces the previous assembled high-voltage interlock. It is fixed in the connection mechanism by one-piece injection molding, eliminating the need for assembly, reducing costs, and fully meeting the high-voltage interlock effect.

[0073] 8. The sealing structure of the connecting mechanism no longer uses a separate sealing ring, but adopts a secondary injection molding sealing structure to replace the traditional sealing ring. It can be directly molded onto the connecting mechanism, resulting in better injection molding bonding and reduced costs.

[0074] 9. The temperature measuring mechanism can monitor the temperature of the terminals inside the connection mechanism independently, avoiding the inability to monitor the temperature of the connection mechanism due to the failure of temperature sensors in other locations. Attached Figure Description

[0075] To more clearly illustrate the technical solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0076] Figure 1 This is a schematic diagram of the flat strip connection mechanism in this invention.

[0077] Figure 2 This is a cross-sectional view of the connection between the flat strip and the double flat strip in this invention.

[0078] Figure 3 This is a schematic diagram of the connection structure between the flat strip and the double flat strip in this invention.

[0079] Figure 4 This is a schematic diagram of the male end connection mechanism in this invention.

[0080] Figure 5 Fig. 1 is a schematic diagram of a flat ribbon structure in the present application.

[0081] Figure 6 Fig. 2 is a schematic diagram of a male connecting mechanism structure in the present application.

[0082] Figure 7 Fig. 3 is a schematic diagram of a double flat ribbon structure in the present application.

[0083] Figure 8 Fig. 4 is a schematic diagram of a clamp structure in the present application.

[0084] Figure 9 Fig. 5 is a schematic diagram of an interlocking connector structure in the present application.

[0085] Figure 10 Fig. 6 is a schematic diagram of a high-voltage interlocking structure in the present application.

[0086] Figure 11 Fig. 7 is a schematic diagram of a flat ribbon and double flat ribbon magnetic field structure in the present application.

[0087] Figure 12 Fig. 8 is a schematic diagram of a flat ribbon and double flat ribbon magnetic field structure in the present application.

[0088] Figure 13 Fig. 9 is a schematic diagram of a flat ribbon and double flat ribbon magnetic field structure in the present application. Figure 1 Fig. 10 is a schematic diagram of a flat ribbon connecting mechanism A direction cross-section.

[0089] Wherein:

[0090] 10, male connecting mechanism; 11, flat ribbon; 12, male housing; 111, first outer insulation layer; 112, first flat wire core; 113, flat terminal; 1131, first bending part; 13, interlocking connector;

[0091] 20, female connecting mechanism; 21, double flat ribbon; 22, female housing; 211, second outer insulation layer; 212, second flat wire core; 213, wire clamping terminal; 2131, second bending part; 214, flat conductor; 23, high-voltage interlocking structure;

[0092] 30, clamp; 31, side wall; 32, elastic unit;

[0093] 40, sealing structure; DETAILED DESCRIPTION

[0094] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0095] In an embodiment, a flat ribbon type connection mechanism includes a male connection mechanism 10 and a female connection mechanism 20. The male connection mechanism 10 includes a flat ribbon 11, a flat terminal 113, and a male housing 12 connected with the flat ribbon 11 and the flat terminal 113. The female connection mechanism 20 includes a double flat ribbon 21, a clamping terminal 213, and a female housing 22 connected with the double flat ribbon 21 and the clamping terminal 213. The male connection mechanism 10 and the female connection mechanism 20 are electrically connected through the flat terminal 113 and the clamping terminal 213, and the male housing 12 and the female housing 22 are assembled and connected to form the flat ribbon type connection mechanism, as shown in the following figure. Figures 1-6

[0096] The flat ribbons are arranged in layers with appropriate spacing, which can effectively reduce the electromagnetic interference caused by the flat ribbons after being powered on to other components, thereby achieving the cancellation of the high-voltage charging wire harness shielding layer structure and meeting the requirements of reducing cost and weight.

[0097] Further, the flat ribbon 11 or the double flat ribbon 21 has great advantages in heat dissipation and assembly. Since the width-to-height ratio of the conductive part of the flat ribbon 11 or the double flat ribbon 21 is large, that is, there is a large planar contact with the external environment, effective heat dissipation can be achieved, the cable temperature rise caused by current can be quickly reduced, and the service life of the cable is prolonged. In addition, when the cable is assembled, if the installation environment height is insufficient, the flat ribbon 11 or the double flat ribbon 21 can be used to reduce the height of the cable laying, effectively stick to the installation environment for assembly, reduce the requirement of installation space, and improve the space utilization rate.

[0098] In some embodiments, the material of the flat terminal 113 and the clamping terminal 213 is a metal conductive material containing one or more of nickel, cadmium, zirconium, chromium, cobalt, manganese, aluminum, tin, titanium, zinc, copper, silver, gold, phosphorus, tellurium, beryllium, lead, and the like. These materials have stable properties and good conductivity, and the preferred material is a material containing copper or copper alloy or aluminum or aluminum alloy.

[0099] ​In some embodiments, the material of the conductive part of the flat ribbon 11 and the double flat ribbon 21 contains one or more of aluminum, phosphorus, tin, copper, iron, manganese, chromium, titanium, and lithium. In some embodiments, the material of the conductive part of the flat ribbon 11 and the double flat ribbon 21 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 current conduction. Copper has high conductivity and good ductility. However, with the increasing price of copper, the cost of using copper as a material for wires will be higher and higher. Therefore, people have begun to look for alternatives to metal copper to reduce costs. The content of aluminum in the earth's crust is about 7.73%. After optimization of the refining technology, the price is relatively low, and compared with copper, aluminum is lighter in weight and has conductivity only second to copper. Therefore, aluminum can replace part of copper in the field of electrical connection. Thus, in the field of automobile electrical connection, aluminum is used to replace copper, which is a development trend. In an embodiment, the aspect ratio of the cross section of the flat ribbon 11 is 1:1-120:1.

[0100] In order to verify the influence of the aspect ratio of the cross section of the flat ribbon 11 on the temperature rise and tensile strength of the flat ribbon 11, the inventors selected flat ribbon 11 samples with the same cross-sectional area specifications and different aspect ratios, and tested the temperature rise and tensile strength of the flat ribbon 11. The test results are shown in Table 1.

[0101] The test method for the temperature rise of the flat ribbon 11 is as follows: the same current is passed through the flat ribbon 11, and the temperature of the same position of the flat ribbon 11 before power-on and after temperature stabilization is detected in a closed environment, and the absolute value is obtained by taking the difference. In this embodiment, a temperature rise greater than 50K is considered unqualified.

[0102] The test method for the tensile strength of the flat ribbon 11 is as follows: a universal tensile testing machine is used, the flat ribbon 11 sample is fixed at both ends of the tensile clamps of the universal tensile testing machine, and the tensile test is performed at a speed of 50mm / min. The tensile force value at the final break is recorded. In this embodiment, a tensile force value greater than 1600N is a qualified value.

[0103] Table 1: Influence of the aspect ratio of the cross section of the flat ribbon 11 on the temperature rise and tensile strength of the flat ribbon 11

[0104]

[0105] As can be seen from Table 1, when the cross-sectional aspect ratio of the flat ribbon 11 is less than 1:1, the temperature rise of the flat ribbon 11 is greater than 50K, which is unqualified, when the cross-sectional aspect ratio of the flat ribbon 11 is greater than or equal to 1:1, the temperature rise of the flat ribbon 11 is less than 50K, which is qualified, and the state is getting better, because the greater the cross-sectional aspect ratio of the flat ribbon 11, the greater the heat dissipation area of the flat ribbon 11, and the lower the temperature rise value of the flat ribbon 11 with good heat dissipation under the same temperature rise. When the cross-sectional aspect ratio of the flat ribbon 11 is greater than 120:1, the flat ribbon 11 is too thin, and when the flat ribbon 11 is subjected to tension, the thin flat ribbon 11 cannot withstand a large tension and is broken, so the tensile strength of the flat ribbon 11 does not meet the qualified value requirement. Therefore, the inventors set the cross-sectional aspect ratio of the flat ribbon 11 to be 1:1-120:1.

[0106] In an embodiment, the cross-sectional aspect ratio of the double flat ribbon 21 is 1:1-120:1.

[0107] In order to verify the influence of the cross-sectional aspect ratio of the double flat ribbon 21 on the temperature rise and tensile strength of the double flat ribbon 21, the inventors selected double flat ribbon 21 samples with the same cross-sectional area specifications and different aspect ratios, and tested the temperature rise and tensile strength of the double flat ribbon 21. The test results are shown in Table 2.

[0108] The test method of the temperature rise of the double flat ribbon 21 is to pass the same current through the double flat ribbon 21, detect the temperature of the same position of the double flat ribbon 21 before and after temperature stabilization in a closed environment, and take the absolute value of the difference. In this embodiment, a temperature rise greater than 50K is considered unqualified.

[0109] The tensile strength test method of the double flat ribbon 21 is to use a universal tensile testing machine, fix the double flat ribbon 21 sample at both ends of the universal tensile testing machine, and stretch at a speed of 50mm / min, and record the tensile force value at the final break. In this embodiment, a tensile force value greater than 1600N is the qualified value.

[0110] Table 2: Influence of cross-sectional aspect ratio of double flat ribbon 21 on temperature rise and tensile strength of double flat ribbon 21

[0111]

[0112] As can be seen from Table 2, when the cross-sectional aspect ratio of the double flat cable 21 is less than 1:1, the temperature rise of the double flat cable 21 is greater than 50K, which is unqualified, when the cross-sectional aspect ratio of the double flat cable 21 is greater than or equal to 1:1, the temperature rise of the double flat cable 21 is less than 50K, which is qualified, and the state is getting better and better, because the greater the cross-sectional aspect ratio of the double flat cable 21, the greater the heat dissipation area of the double flat cable 21, and the lower the temperature rise value of the double flat cable 21 with better heat dissipation under the same temperature rise. When the cross-sectional aspect ratio of the double flat cable 21 is greater than 120:1, the double flat cable 21 is too thin, and when the double flat cable 21 is subjected to tension, the thin double flat cable 21 cannot withstand a large tension and is broken, so the tensile strength of the double flat cable 21 does not meet the qualified value requirement. Therefore, the inventor sets the cross-sectional aspect ratio of the double flat cable 21 to be 1:1-120:1.

[0113] In an embodiment, as shown in Figure 3 The flat cable is at least two, and the flat cables are stacked up and down. The male end shell is integrally injection molded between at least part of the flat cables and / or at least part of the flat terminals and / or forms an insulation structure around the periphery.

[0114] Generally, the conductive loop is composed of two loops, for example, in a direct current charging seat, there are a direct current positive charging cable and a direct current negative charging cable, and in an alternating current charging seat, there are an alternating current live charging cable and an alternating current zero charging cable. The flat cables 11 are stacked up and down, which can effectively utilize the assembly space and has the effect of offsetting electromagnetic interference. After the two flat cables 11 are stacked up and down, the raw material of the male end shell 12 is injection molded between at least part of the flat cables 11 and / or the flat terminals 113 and around the periphery to form the male end shell 12, which can better insulate and protect the flat cables 11 and the flat terminals 113.

[0115] In some embodiments, when more loops need to be connected, the flat cable 11 can also be three, four or more, connecting different loops.

[0116] The flat cable connection mechanism in the embodiment is provided with an injection molded male end shell 12, which is simple to process and has low cost. The flat cable 11 or double flat cable 21 can be directly injection molded and insulated, which can reduce the installation cost of the flat cable 11 or double flat cable 21, and the front end of the flat cable 11 or double flat cable 21 can be formed into various shapes as required without considering the assembly problem, saving processing procedures and reducing processing cost.

[0117] In an embodiment, as shown in Figure 2As shown, the flat ribbon 11 includes a first outer insulation layer 111 and a first flat wire core 112, the first outer insulation layer 111 is partially stripped to expose the first flat wire core 112, and the end of the first outer insulation layer 111 is in or abuts the male housing 12. The first flat wire core 112 is the conductive part of the flat ribbon 11, and the first outer insulation layer 111 is the insulating part of the flat ribbon 11. Before injection molding the male housing 12, a portion of the first outer insulation layer 111 of the flat ribbon 11 needs to be stripped to expose the internal first flat wire core 112, and then connected to the flat terminal 113 and integrally injection molded with the male housing 12.

[0118] In an embodiment, the flat ribbon 11 is at least two, and the flat ribbons 11 are stacked vertically. The flat ribbon 11 includes a first flat wire core 112, and the vertical distance between the two first flat wire cores 112 is less than or equal to 27 cm.

[0119] Further, the flat ribbon 11 is at least two, and the flat ribbons 11 are stacked vertically. The flat ribbon 11 includes a first flat wire core 112, and the vertical distance between the two first flat wire cores 112 is less than or equal to 7 cm.

[0120] The flat ribbon 11 will generate an induced magnetic field when energized, which will cause electromagnetic interference to the outside. The common solution in the prior art is to provide an electromagnetic shielding layer outside the flat ribbon 11. In order to cancel the shielding structure, reduce the cost and weight, the present application adopts the following design, the electric energy transmission system for vehicles includes two flat ribbons 11 stacked.

[0121] When the two flat ribbons 11 are placed vertically, the generated magnetic field is as shown in Figure 11 and Figure 12 As the first flat wire core 112 is a flat structure, the strongest part of its magnetic field is at the largest area. By stacking the first flat wire core 112, the magnetic fields of the two first flat wire cores 112 can be canceled out (since the current in the two first flat wire cores 112 is the same in size and opposite in direction, the induced magnetic field is the same in strength and opposite in direction), thereby eliminating the electromagnetic interference of the first flat wire core 112 when energized to other electrical devices.

[0122] Preferably, the two flat ribbons 11 are parallel to each other in the width direction. The flat ribbons 11 are mirror images of each other. The distance between the first flat wire cores 112 is H. The stacking direction of the two flat ribbons 11 is the up-down direction in Figure 11 and Figure 12

[0123] When the coincidence of the two flat ribbons 11 along the stacking direction is 100%, the influence of the distance H between the first flat wire cores 112 on the magnetic field cancellation is shown in Table 3,

[0124] A magnetic field cancellation percentage greater than 30% is a qualified value.​

[0125] Table 3: The influence of the distance H between the first flat wire cores 112 on the magnetic field cancellation when the overlap of the two flat belts 11 is 100%

[0126]

[0127] The overlap degree means the percentage of the overlapping area of the two flat belts 11 along the stacking direction to the area of one flat belt 11.

[0128] As shown in Table 3, when the overlap of the two flat belts 11 along the stacking direction is 100%, the magnetic field cancellation percentage is qualified when the distance H between the two first flat wire cores 112 is less than or equal to 27 cm, which has a certain effect on the anti-electromagnetic interference. Preferably, the magnetic field can be effectively cancelled when the vertical distance between the two first flat wire cores 112 is less than or equal to 7 cm, and the effect is obvious. Therefore, the distance H between the two first flat wire cores 112 is further set to be less than or equal to 7 cm.

[0129] The flat belt type connecting mechanism of the embodiment can effectively reduce the electromagnetic interference caused by the energization of the flat belts 11 on other components, thereby achieving the cancellation of the high-voltage charging wire harness shielding layer structure and the reduction of the cost and weight.

[0130] In an embodiment, the flat belts 11 are at least two, the flat belts 11 are stacked up and down, the flat belts 11 comprise first flat wire cores 112, and the overlap of the two first flat wire cores 112 along the stacking direction is 40%-100%.

[0131] When the flat belts 11 are stacked up and down, the strongest magnetic field of the flat belts 11 is at the largest area part, and the magnetic fields of the positive and negative charging flat belts 11 can be cancelled by the stacking of the flat belts 11, thereby eliminating the electromagnetic interference of other electrical devices caused by the energization of the flat belts 11.

[0132] The distance between the flat belts 11 and the overlap degree of the stacked flat belts 11 have a great influence on the degree of magnetic field cancellation. The present application effectively cancels the magnetic field of the flat belts 11 by controlling the stacking design, the stacking distance and the overlap degree of the two flat belts 11.

[0133] When the distance between the first flat wire cores 112 of the two flat belts 11 is 7 cm, the influence of the overlap of the two flat belts 11 along the stacking direction on the magnetic field cancellation is shown in Table 2, and the magnetic field cancellation percentage greater than 30% is a qualified value.

[0134] Table 4: The influence of the overlap area of the stacked flat belts 11 on the magnetic field cancellation when the distance between the two first flat wire cores 112 is 7 cm

[0135]

[0136] From table 4, when the distance between the two first flat wire cores 112 is 7cm, the coincidence degree of the flat ribbon 11 along the stacking direction is 40%-100%, the magnetic field offset percentage is qualified, and it has a certain effect on preventing electromagnetic interference. When the coincidence degree of the two flat ribbons 11 along the stacking direction is more than 90%, the effect is obvious. When the coincidence degree of the two flat ribbons 11 along the stacking direction is 100%, the effect is optimal.

[0137] In an embodiment, as shown in Figures 1-5 The flat ribbon 11 includes a first flat wire core 112 and a first outer insulating layer 111. The front end of the first flat wire core 112 is connected with the flat terminal 113, and the male terminal shell 12 covers at least part of the flat terminal 113. The flat ribbon 11 is stripped of the first outer insulating layer 111 to expose the first flat wire core 112. The first flat wire core 112 is connected with the flat terminal 113. The flat terminal 113 is arranged to effectively connect with the clamping terminal 213 in a plug-in connection, thereby realizing effective electrical connection of the flat ribbon connection mechanism.

[0138] In order to enable the flat terminal 113 to effectively connect with the clamping terminal 213 in a plug-in connection, the flat terminal 113 needs to be exposed outside the male terminal shell 12 during the integration of the flat ribbon 11 and the male terminal shell 12, so as to prevent the flat terminal 113 from being unable to connect with the clamping terminal 213 in a plug-in connection due to the covering of the male terminal shell 12.

[0139] Further, the connection mode of the front end of the first flat wire core 112 with the flat terminal 113 is one or more of resistance welding, friction welding, ultrasonic welding, arc welding, laser welding, electron beam welding, pressure diffusion welding, screwing, clamping, splicing, and crimping.

[0140] The resistance welding mode refers to a method of using strong current to pass through the contact points between the electrode and the workpiece to generate heat through the contact resistance to realize welding. The front end of the first flat wire core 112 is welded with the flat terminal 113 by resistance welding.

[0141] The friction welding mode refers to a method of using heat generated by friction of the contact surface of the workpiece as a heat source to make the workpiece plastically deform under pressure to realize welding. The front end of the first flat wire core 112 is welded with the flat terminal 113 by friction welding.

[0142] The ultrasonic welding mode refers to a method of using high-frequency vibration waves transmitted to the surfaces of two objects to be welded to make the surfaces of the two objects rub against each other under pressure to form a fusion between the molecular layers. The front end of the first flat wire core 112 is welded with the flat terminal 113 by ultrasonic welding.

[0143] Arc welding method refers to using air discharge physical phenomenon to convert electric energy into heat energy and mechanical energy required for welding, so as to achieve the purpose of connecting metals. The main methods include shielded metal arc welding, submerged arc welding, gas shielded welding, etc.

[0144] Laser welding method is a high-efficiency precision welding method using high-energy density laser beam as heat source.

[0145] Electron beam welding method refers to using accelerated and focused electron beam to bombard the welding surface in vacuum or non-vacuum, so as to melt the welded workpiece and realize welding.

[0146] Pressure welding method is a method of applying pressure to the welded parts to make the joint surface tightly contact and produce certain plastic deformation to complete welding.

[0147] Diffusion welding method refers to a solid-state welding method of pressing the workpiece at high temperature without visible deformation and relative movement.

[0148] Magnetic induction welding method is a kind of solid-state cold welding, which can weld the first fixed end 121 with similar or dissimilar properties and the first cable 11 together.

[0149] Screw connection method refers to the detachable connection of connecting parts into a whole by using threaded parts (or threaded parts of connected parts). Common threaded connecting parts include bolts, studs, screws and set screws, etc., which are mostly standard parts.

[0150] Clamping method refers to setting corresponding clamping jaws or clamping grooves on the connecting ends or connecting surfaces respectively, assembling through the clamping grooves and clamping jaws, and connecting them together. The clamping method has the advantages of quick connection and detachability.

[0151] Splicing method refers to setting corresponding grooves and protrusions on the connecting ends or connecting surfaces respectively, assembling through mutual tenon joint or splicing of the grooves and protrusions, and connecting them together. The splicing method has the advantages of stable connection and detachability.

[0152] Pressure connection method is a production process of assembling the front end of the first flat wire core 112 with the flat terminal 113, and then using a pressure bonding machine to stamp them into one body. The advantage of pressure connection is mass production, which can quickly and massively manufacture stable quality products by using automatic pressure bonding machine.

[0153] In an embodiment, the flat cable 11 comprises a first flat wire core 112, and the first flat wire core 112 and the flat terminal 113 are in an integrated structure. The first flat wire core 112 and the flat terminal 113 can be made of the same material, or the front end of the first flat wire core 112 can be directly formed into the flat terminal 113, which can save the use of the flat terminal 113, reduce the material cost, save the processing time, and the front end of the first flat wire core 112 can be formed into various shapes according to the needs, without considering the assembly problem.

[0154] In an embodiment, the flat terminal 113 at least partially protrudes from the male housing 12, or the male housing 12 has a receiving cavity, and the flat terminal 113 at least partially protrudes from the bottom surface of the receiving cavity but does not exceed the male housing 12. The flat terminal 113 at least partially protrudes from the male housing 12 and can be directly connected to the clamping terminal 213 in the female housing 22, or the flat terminal 113 can be arranged inside the receiving cavity of the male housing 12, and the clamping terminal 213 in the female housing 22 can be inserted into the receiving cavity and connected to the flat terminal 113, which can achieve safe and fast plugging.

[0155] In an embodiment, as shown in Figures 2-3 The flat cable comprises a first flat wire core, and the first flat wire core 112 and the flat terminal 113 comprise a first bending part 1131, and the angle of the first bending part 1131 is 0°-180°. The first bending part 1131 is arranged to have different bending angles, which can be suitable for different shapes and different connection mechanisms of the first flat wire core 112 and the flat terminal 113. According to the needs of the installation environment, the needs of simplifying the structure of the connection mechanism, and the needs of reducing the connection space, the designer can set the first bending part 1131 to have different angles, which is used to connect the flat terminal 113 and the clamping terminal 213 with different angles, so as to change the cable direction on both sides of the connection mechanism. In addition, the first flat wire core 112 and the flat terminal 113 are connected through the first bending part 1131, and the extension direction of the first flat wire core 112 is adjusted through the first bending part 1131, which facilitates the adaptation of the flat cable 11 to the installation environment.

[0156] In the embodiment, the flat cable 11 has the advantages of convenient bending and forming, that is, the flat cable 11 can maintain the shape after bending, which can be arranged along the body sheet metal, and can be bent and formed according to the needs at different positions, so as to save space and facilitate fixation.

[0157] In an embodiment, the flat terminal 113 is provided with a first transition layer at least partially. When the material of the flat terminal 113 and the wire clamping terminal 213 is inconsistent, the electric conduction between the two will cause electrochemical corrosion due to the potential difference, thereby reducing the service life of the flat terminal 113 and the wire clamping terminal 213. In order to reduce such electrochemical corrosion, a first transition layer can be provided on the flat terminal 113, and the material of the first transition layer can be a metal material with a potential between the potential of the material of the flat terminal 113 and the potential of the material of the wire clamping terminal 213, thereby isolating the flat terminal 113 and the wire clamping terminal 213. The first transition layer can reduce the electrochemical reaction between the flat terminal 113 and the wire clamping terminal 213, and prolong the service life of the flat terminal 113 and the wire clamping terminal 213.

[0158] Further, the first transition layer is attached to at least part of the surface of the flat terminal by one or more of electroplating, electroless plating, magnetron sputtering, vacuum plating, pressure welding, diffusion welding, friction welding, resistance welding, ultrasonic welding or laser welding.

[0159] The electroplating method is a process of plating a thin layer of other metal or alloy on the surface of certain metal by using electrolysis principle.

[0160] The electroless plating method is a process of depositing metal by controllable oxidation-reduction reaction under the catalytic action of metal.

[0161] The magnetron sputtering method is to make electrons run in a spiral shape near the target surface by the interaction of magnetic field and electric field, thereby increasing the probability of ion generation by electron impact on argon gas. The generated ions hit the target surface under the action of electric field and sputter the target material.

[0162] The vacuum plating method is to deposit various metal and non-metal thin films on the surface of the plastic part by distillation or sputtering under vacuum conditions.

[0163] Pressure welding is a method of applying pressure to the welded parts to make the joint surface tightly contact and produce plastic deformation to complete the welding.

[0164] The friction welding method is a method of using the heat generated by the friction of the contact surface of the workpiece as a heat source to make the workpiece produce plastic deformation under pressure to perform welding.

[0165] The resistance welding method is a method of using strong current through the contact point between the electrode and the workpiece to generate heat by contact resistance to achieve welding.

[0166] The ultrasonic welding method is to use high-frequency vibration waves to transmit to the surfaces of two objects to be welded, and under pressure, the surfaces of the two objects are rubbed against each other to form a molten layer between the molecules.

[0167] The laser welding method is a high-efficiency and precise welding method using a high-energy density laser beam as a heat source.

[0168] The diffusion welding method refers to a solid-state welding method of pressing workpieces at high temperature without visible deformation and relative movement. The first transition layer can be stably arranged on the surface of the flat terminal 113 by using the above methods or combinations thereof.

[0169] In an embodiment, the thickness of the first transition layer is 0.3 μm to 3000 μm.

[0170] Further, the thickness of the first transition layer is 2.5 μm to 1000 μm.

[0171] In order to test the influence of different thicknesses of the first transition layer on the voltage drop, the inventors use flat terminals 113 of the same material and structure, arrange first transition layers of different thicknesses on the flat terminals 113, do not arrange transition layers on the wire clamping terminals 213, and then test the voltage drop after the flat terminals 113 and the wire clamping terminals 213 are plugged together.

[0172] In this embodiment, the voltage drop after the flat terminal 113 and the wire clamping terminal 213 are plugged together is greater than 4 mV, which is unqualified.

[0173] Table 5: Influence of different thicknesses of the first transition layer on the voltage drop (mV):

[0174]

[0175]

[0176] From the data in Table 5 above, when the thickness of the first transition layer is greater than 3000 μm and less than 0.3 μm, the voltage drop of the plugging structure of the flat terminal 113 and the wire clamping terminal 213 is greater than 4 mV, which does not meet the required value. Therefore, the inventors select the thickness of the first transition layer to be 0.3 μm to 3000 μm. Among them, when the thickness of the first transition layer is in the range of 2.5 μm to 1000 μm, the voltage drop of the plugging structure of the flat terminal 113 and the wire clamping terminal 213 is the optimal value. Therefore, preferably, the inventors select the thickness of the first transition layer to be 2.5 μm to 1000 μm.

[0177] In an embodiment, the material of the first transition layer is one or more of nickel, cadmium, manganese, zirconium, cobalt, tin, titanium, chromium, gold, silver, zinc, tin-lead alloy, silver-antimony alloy, palladium, palladium-nickel alloy, graphite-silver, graphene-silver, hard silver, and silver-gold-zirconium alloy.

[0178] The material of the first transition layer is the same as the material of the electrode of the flat terminal 113. Such a solution can enhance the surface strength of the flat terminal 113 and avoid corrosion caused by the lamination of the flat terminal 113 and dissimilar metals.

[0179] To demonstrate the influence of different materials of the first transition layer on the performance of the flat terminal 113, the inventors use flat terminals 113 of the same size and material with different materials of the first transition layer to conduct a series of corrosion resistance time tests, and the experimental results are shown in Table 6.

[0180] The corrosion resistance time test in Table 6 is to place the flat terminal 113 sample into a salt spray test chamber, spray salt mist on each position of the flat terminal 113, take it out every 20 hours, clean and observe the surface corrosion, which is one cycle, until the surface corrosion area of the flat terminal 113 sample is greater than 10% of the total area, stop the test, and record the cycle number at that time. In this embodiment, the cycle number less than 80 is considered unqualified.

[0181] Table 6: Influence of different materials of the first transition layer on the corrosion resistance of the flat terminal 113 sample

[0182]

[0183]

[0184] As can be seen from Table 6, when the first transition layer material contains commonly used metals such as tin, nickel, and zinc, the experimental results are not as good as those of other selected metals. The experimental results of other selected metals exceed the standard value more and the performance is more stable. Therefore, the inventors select the first transition layer material to contain (or be) one or more of nickel, cadmium, manganese, zirconium, cobalt, titanium, chromium, gold, silver, tin-lead alloy, silver-antimony alloy, palladium, palladium-nickel alloy, graphite-silver, graphene-silver, hard silver, and silver-gold-zirconium alloy. More preferably, the first transition layer material contains (or is) one or more of cadmium, manganese, zirconium, cobalt, titanium, chromium, gold, silver, tin-lead alloy, silver-antimony alloy, palladium, palladium-nickel alloy, graphite-silver, graphene-silver, hard silver, and silver-gold-zirconium alloy.

[0185] In an embodiment, the flat strip includes a first flat wire core, and the hardness of the first flat wire core 112 is 8HV-105HV.

[0186] To verify the influence of the hardness of the first flat wire core 112 on the force of the first transition layer peeling off from the first flat wire core 112 and the torque of the first flat wire core 112 bending in the XY direction, the inventors select flat terminal 113 samples of the same size and use first flat wire cores 112 with different hardnesses to test the force of the first transition layer peeling off from the first flat wire core 112 and the torque of the first flat wire core 112 when bending, and the test results are shown in Table 7.

[0187] The test method for the force of the first transition layer peeling: using a universal tensile testing machine, the first flat wire core 112 sample welded with the first transition layer is fixed on the tensile fixture of the universal tensile testing machine, and the tensile test is carried out at a speed of 50 mm / min, and the tensile force value when the first transition layer finally peels off from the first flat wire core 112 is recorded. In this embodiment, the tensile force value greater than 900 N is the qualified value.

[0188] The torque test method when the first flat wire core 112 is bent: using a torque tester, when the first flat wire core 112 is bent at the same radius and the same speed to 90°, the torque value of the deformation of the first flat wire core 112 in the bending process is tested. In this embodiment, the torque value less than 30 N·m is the qualified value.

[0189] Table 7: The influence of the hardness of the first flat wire core 112 on the force of the first transition layer peeling and the torque when bending

[0190]

[0191] As can be seen from Table 7 above, when the hardness of the first flat wire core 112 is less than 8 HV, the tensile force value when the first transition layer peels off from the first flat wire core 112 is less than the qualified value. At this time, the first transition layer on the first flat wire core 112 is easy to peel off from the first flat wire core 112 under the action of external force, so as to fail to protect the first flat wire core 112 and cause the first flat wire core 112 to fail to function, thereby failing to achieve the purpose of electric energy transmission, and in severe cases, it can cause a short circuit to cause a burning accident. When the hardness of the first flat wire core 112 is greater than 105 HV, because the hardness of the first flat wire core 112 itself is high, when the first flat wire core 112 needs to be bent, a larger torque is needed to deform the first flat wire core 112. At this time, the torque value does not meet the qualified value requirement. Therefore, the inventors set the hardness of the first flat wire core 112 to be 8 HV-105 HV.

[0192] As can be seen from the data in Table 7, when the hardness of the first flat wire core 112 is 10 HV-55 HV, the tensile force value when the first transition layer peels off from the first flat wire core 112 and the torque value of the first flat wire core 112 XY direction bending are in a good range. Therefore, the inventors prefer the hardness of the first flat wire core 112 to be 10 HV-55 HV.

[0193] In an embodiment, the end of the flat terminal 113 is provided with a chamfer. The flat terminal 113 and the wire clamping terminal 213 will have assembly errors when they are respectively molded and installed, and the flat terminal 113 and the wire clamping terminal 213 will also have a large assembly error when they are assembled. In order to facilitate the accurate insertion of the flat terminal 113 into the wire clamping terminal 213, the end of the flat terminal 113 is provided with a chamfer, which serves as a guide when the flat terminal 113 is inserted into the wire clamping terminal 213.

[0194] In an embodiment, as shown in Figure 9 and Figure 13 The male connection mechanism 10 includes an interlock connector 13 that is at least partially integrally molded in the male housing 12. High-voltage interlocking is a safety design method for monitoring the integrity of a high-voltage circuit with a low-voltage signal. Different projects have different designs for the implementation of high-voltage interlocking. High-voltage interlocking monitors the accidental disconnection of a high-voltage circuit to prevent damage to the vehicle in the event of a sudden loss of power. In the present embodiment, the high-voltage interlocking is an interlock connector 13 that is a U-shaped or V-shaped low-voltage circuit with two insertion pins that are electrically connected. The interlock connector 13 does not need to be installed and can be directly molded in the male housing 12 by integrally molding. The insertion pins are exposed outside the male housing 12 and are connected to the high-voltage interlocking structure 23 in the female connection mechanism 20 to form a low-voltage monitoring circuit. When the flat ribbon connection mechanism in the present embodiment is accidentally disconnected, the interlock connector 13 and the high-voltage interlocking structure 23 will also be disconnected at the same time, and the low-voltage monitoring circuit will alarm the central control system, thereby preventing damage to the vehicle in the event of a sudden loss of power.

[0195] In an embodiment, as shown in Figure 7 The double flat ribbon is at least two flat ribbons, and the double flat ribbons are stacked one on top of the other. The female housing is integrally molded between at least part of the double flat ribbons and / or at least part of the wire clamping terminals and / or forms an insulating structure around the periphery.

[0196] Generally, a conductive circuit is composed of two circuits, such as a direct current charging seat with a direct current positive charging cable and a direct current negative charging cable, and an alternating current charging seat with an alternating current live charging cable and an alternating current zero charging cable. The double flat ribbons 21 are stacked one on top of the other, which effectively utilizes the assembly space and has the effect of canceling electromagnetic interference. After the two double flat ribbons 21 are stacked one on top of the other, the raw material of the female housing 22 is injected into at least part of the double flat ribbons 21 and / or the wire clamping terminals 213 and around the periphery by an injection mold to form the female housing 22.

[0197] In an embodiment, as shown in Figure 2As shown, the double flat ribbon 21 includes a second outer insulation layer 211 and a second flat wire core 212, the second outer insulation layer 211 is partially stripped to expose the second flat wire core 212, and the end of the second outer insulation layer 211 is inside or abuts the female end housing 22. The second flat wire core 212 is the conductive part of the double flat ribbon 21, and the second outer insulation layer 211 is the insulating part of the double flat ribbon 21. Before the female end housing 22 is integrally injection molded, a portion of the second outer insulation layer 211 of the double flat ribbon 21 needs to be stripped to expose the internal second flat wire core 212, and then the connection of the wire clamping terminal 213 and the integrally injection molding of the female end housing 22 are performed.

[0198] In an embodiment, the double flat ribbon 21 is at least two, the double flat ribbon 21 is stacked vertically, the double flat ribbon 21 includes a second flat wire core 212, and the vertical distance between the two second flat wire cores 212 is less than or equal to 27 cm.

[0199] Further, the double flat ribbon 21 is at least two, the double flat ribbon 21 is stacked vertically, the double flat ribbon 21 includes a second flat wire core 212, and the vertical distance between the two second flat wire cores 212 is less than or equal to 7 cm.

[0200] Preferably, the width direction of the two double flat ribbons 11 is parallel to each other. The double flat ribbons 21 are mirror images of each other. The distance between the two second flat wire cores 212 is H. The stacking direction of the two double flat ribbons 21 is the up-down direction in the table. Figure 10

[0201] When the coincidence degree of the two double flat ribbons 21 along the stacking direction is 100%, the influence of the distance H between the two second flat wire cores 212 on magnetic field cancellation is shown in Table 8, and a magnetic field cancellation percentage greater than 30% is a qualified value.

[0202] Table 8: Influence of distance H between two second flat wire cores 212 on magnetic field cancellation when the overlapping area of two flat ribbon 21 stacks is 100%

[0203]

[0204]

[0205] wherein the meaning of the coincidence degree is that the overlapping area of the two double flat ribbons 21 along the stacking direction accounts for a percentage of the area of one double flat ribbon 21.

[0206] ​From table 8, when the coincidence degree of the two double flat belts 11 along the stacking direction is 100%, the distance H between the two second flat wire cores 212 is less than or equal to 27 cm, the magnetic field cancellation percentage is qualified, and the effect of preventing electromagnetic interference is certain; preferably, the distance between the two second flat wire cores 212 is less than or equal to 7 cm, the magnetic field can be effectively cancelled, and the effect is obvious, so the distance H between the two second flat wire cores 212 is further less than or equal to 7 cm.

[0207] The flat belt type connecting mechanism of the embodiment can effectively reduce the electromagnetic interference caused by the energization of the double flat belts 11 on other components, thereby achieving the cancellation of the high-voltage charging wire harness shielding layer structure and achieving the requirements of reducing cost and weight.

[0208] In an embodiment, the double flat belts 21 are at least two, the double flat belts 21 are stacked up and down, the double flat belts 21 include second flat wire cores 212, and the coincidence degree of the two second flat wire cores 212 along the stacking direction is 40%-100%.

[0209] When the double flat belts 21 are stacked up and down, the strongest magnetic field of the flat belts 21 is at the largest area, and the stacking of the double flat belts 21 can cancel the magnetic field of the positive and negative charging double flat belts 21, thereby eliminating the electromagnetic interference of other electrical devices caused by the energization of the double flat belts 21.

[0210] The distance between the two double flat belts 21 and the stacking coincidence degree of the double flat belts 21 have a great influence on the degree of magnetic field cancellation, and the present application effectively cancels the magnetic field of the double flat belts 21 by controlling the stacking design, the stacking distance and the coincidence degree of the two double flat belts 21.

[0211] When the distance between the first flat wire cores 112 of the two double flat belts 21 is 7 cm, the influence of the coincidence degree of the two flat belts 11 along the stacking direction on the magnetic field cancellation is shown in table 6, and the magnetic field cancellation percentage greater than 30% is a qualified value.

[0212] Table 9: Influence of double flat belt 21 stacking coincidence area on magnetic field cancellation when the distance between the two second flat wire cores 212 is 7 cm

[0213]

[0214]

[0215] From table 9, when the distance between the two second flat wire cores 212 is 7cm, the coincidence of the double flat ribbon 21 along the stacking direction is 40%-100%, the magnetic field offset percentage is qualified, and it has a certain effect on preventing electromagnetic interference. When the coincidence of the two double flat ribbons 21 along the stacking direction is more than 90%, the effect is obvious. When the coincidence of the two double flat ribbons 21 along the stacking direction is 100%, the effect is optimal.

[0216] In an embodiment, the double flat ribbon 21 comprises a second flat wire core 212, and the second flat wire core 212 is connected by overlapping two flat conductors 214. The two flat conductors 214 can be overlapped or have a certain gap. When the two flat conductors 214 are overlapped, the two flat conductors 214 are connected by one or more of pressure welding, diffusion welding, friction welding, resistance welding, ultrasonic welding or laser welding.

[0217] Pressure welding is a method of applying pressure to the welded parts to make the joint surface tightly contact and produce plastic deformation to complete welding.

[0218] Friction welding is a method of using the heat generated by the friction of the contact surface of the workpiece as a heat source to make the workpiece produce plastic deformation under pressure to perform welding.

[0219] Resistance welding is a method of using a strong current passing through the contact points between the electrode and the workpiece to generate heat by contact resistance to achieve welding.

[0220] Ultrasonic welding is a method of using high-frequency vibration waves to transmit to the surfaces of two objects to be welded, and under pressure, the surfaces of the two objects are rubbed against each other to form a molecular layer of fusion.

[0221] Laser welding is a high-efficiency precision welding method that uses a high-energy density laser beam as a heat source.

[0222] Diffusion welding is a solid-state welding method that applies pressure to the workpiece at high temperature without visible deformation and relative movement. The above methods or their combinations can be used to combine the two flat conductors 214.

[0223] In an embodiment, the double flat ribbon 21 comprises a second flat wire core 212 and a second outer insulation layer 211, and the front end of the second flat wire core is connected with the wire clamping terminal 213. The female end shell 22 covers at least part of the wire clamping terminal 213. The double flat ribbon 21 is stripped of the second outer insulation layer 211, exposing the second flat wire core 212, which is connected with the wire clamping terminal 213. The wire clamping terminal 213 is arranged to effectively connect with the flat terminal 113, realizing effective electrical connection of the flat ribbon connection mechanism.

[0224] In order to enable the clamping terminal 213 to effectively connect with the flat terminal 113, during the process of integrally forming the double flat cable 21 and the female end housing 22, the clamping terminal 213 needs to be exposed outside the female end housing 22, so as to prevent the clamping terminal 213 from being unable to connect with the flat terminal 113 due to the covering of the female end housing 22.

[0225] In an embodiment, the connection between the front end of the second flat wire core 212 and the clamping terminal 213 is 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 connection method is the same as the above method, which will not be described here.

[0226] In an embodiment, the second flat wire core 212 and the clamping terminal 213 are an integral structure. The second flat wire core 212 and the clamping terminal 213 can be made of the same material, or the two flat conductors 214 can be extended and formed into the structure of the clamping terminal 213 at the front end. This can save the use of the clamping terminal 213, reduce material costs, save processing time, and can form the two flat conductors 214 at the front end of the second flat wire core 212 into various shapes as required, without considering the assembly problem.

[0227] In an embodiment, the clamping terminal 213 at least partially protrudes from the outer wall of the female end housing 22, and the female end housing 22 is provided with an open boss, and the clamping terminal 213 is at least partially arranged in the open boss. In the above embodiment, the flat terminal 113 protrudes from the male end housing 12 and can be connected with the clamping terminal 213 arranged in the open boss. Alternatively, the male end housing 12 has a groove, and the flat terminal 113 protrudes from the bottom surface of the groove but does not exceed the male end housing 12, and can be connected with the clamping terminal 213 protruding from the outer wall of the female end housing 22.

[0228] In an embodiment, as shown in FIG. 1, Figures 2-3 The second flat wire core 212 and the clamping terminal 213 are connected through the second bending portion 2131. The second bending portion 2131 is arranged at an angle of 0°-180°. The second bending portion 2131 is arranged at different bending angles, which can be suitable for different shapes and different directions of the flat terminal 113. According to the needs of the installation environment and the needs of simplifying the structure and reducing the connection space of the connection mechanism, the designer can set the second bending portion 2131 at different angles for connection with the flat terminal 113 at different angles, so as to change the cable direction on both sides of the connection mechanism. In addition, the main body of the double flat cable 21 and the clamping terminal 213 are connected through the second bending portion 2131, and the extension direction of the double flat cable 21 is adjusted through the second bending portion 2131, which facilitates the adaptation of the double flat cable 21 to the installation environment.

[0229] In an embodiment, the second transition layer is at least partially disposed on the surface of the wire clamping terminal 213. When the wire clamping terminal 213 and the flat terminal 113 are made of different materials, galvanic corrosion can occur between the two due to the difference in the electric potential, which can reduce the service life of the wire clamping terminal 213 and the flat terminal 113. In order to reduce the galvanic corrosion, a transition layer can be disposed on at least part of the surface of the wire clamping terminal 213. The transition layer can be made of a metal material with an electric potential between the electric potential of the wire clamping terminal 213 and the electric potential of the flat terminal 113, so as to isolate the wire clamping terminal 213 and the flat terminal 113, slow down the galvanic corrosion, and prolong the service life of the wire clamping terminal 213 and the flat terminal 113.

[0230] Further, the second transition layer is attached to at least part of the surface of the wire clamping terminal 213 by one or more of electroplating, electroless plating, magnetron sputtering, vacuum plating, pressure welding, diffusion welding, friction welding, resistance welding, ultrasonic welding, or laser welding. The method of fixing the second transition layer to the wire clamping terminal 213 is the same as the method of fixing the first transition layer to the flat terminal 113.

[0231] In an embodiment, the thickness of the second transition layer is 0.3 μm to 3000 μm.

[0232] Further, the thickness of the second transition layer is 2.5 μm to 1000 μm.

[0233] In order to test the effect of different thicknesses of the second transition layer on the voltage drop between the wire clamping terminal 213 and the flat terminal 113, the inventors used wire clamping terminals 213 with the same material and structure, respectively disposed different thicknesses of the first transition layer on the wire clamping terminal 213, and the flat terminal 113 without the transition layer, and then tested the voltage drop after the flat terminal 113 and the wire clamping terminal 213 were plugged together.

[0234] In this embodiment, the voltage drop after the wire clamping terminal 213 and the flat terminal 113 are plugged together is greater than 4 mV, which is unqualified.

[0235] Table 10: Effect of different thicknesses of the second transition layer on the voltage drop (mV):

[0236]

[0237]

[0238] From the above table 10 data, when the second transition layer thickness is greater than 3000 μm and less than 0.3 μm, the voltage drop of the insertion structure of the flat terminal 113 and the wire clamping terminal 213 is greater than 4 mV, which does not meet the required value, therefore, the inventors select the thickness of the second transition layer to be 0.3 μm to 3000 μm. Among them, when the thickness of the second transition layer is in the range of 2.5 μm to 1000 μm, the voltage drop of the insertion structure of the flat terminal 113 and the wire clamping terminal 213 is the optimal value, therefore, preferably, the inventors select the thickness of the second transition layer to be 2.5 μm to 1000 μm.

[0239] In an embodiment, the material of the second transition layer contains one or more of nickel, cadmium, manganese, zirconium, cobalt, tin, titanium, chromium, gold, silver, zinc, tin-lead alloy, silver-antimony alloy, palladium, palladium-nickel alloy, graphite-silver, graphene-silver, hard silver, and silver-gold-zirconium alloy.

[0240] The material of the second transition layer is the same as the material of the electrode of the wire clamping terminal 213. Such a scheme can enhance the surface strength of the wire clamping terminal 213 and avoid corrosion caused by the lamination of the wire clamping terminal 213 and dissimilar metals.

[0241] In order to demonstrate the influence of different second transition layer materials on the performance of the wire clamping terminal 213, the inventors use wire clamping terminals 213 of the same specification and material, but with different second transition layer materials, to conduct a series of corrosion resistance time tests, and the experimental results are shown in Table 11.

[0242] The corrosion resistance time test in Table 11 is to place the wire clamping terminal 213 sample into a salt spray test chamber, spray salt mist on each position of the wire clamping terminal 213, take it out every 20 hours, clean and observe the surface corrosion, which is one cycle, until the surface corrosion area of the wire clamping terminal 213 sample is greater than 10% of the total area, stop the test, and record the cycle number at that time. In this embodiment, less than 80 cycles is considered unqualified.

[0243] Table 11: Influence of different second transition layer materials on the corrosion resistance of the wire clamping terminal 213 sample

[0244]

[0245] As can be seen from Table 11, when the second transition layer material contains commonly used metals such as tin, nickel, and zinc, the experimental results are not as good as those of other selected metals. The experimental results of other selected metals exceed the standard value more and the performance is more stable. Therefore, the inventors select the second transition layer material 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, palladium nickel alloy, graphite silver, graphene silver, hard silver, and silver gold zirconium alloy. More preferably, the second transition layer material contains (or is) one or more of cadmium, manganese, zirconium, cobalt, titanium, chromium, gold, silver, tin lead alloy, silver antimony alloy, palladium, palladium nickel alloy, graphite silver, graphene silver, hard silver, and silver gold zirconium alloy.

[0246] In an embodiment, the hardness of the second flat wire core 212 is 8HV-105HV.

[0247] In order to verify the effect of the hardness of the second flat wire core 212 on the force of peeling the second transition layer from the second flat wire core 212 and the torque of bending the second flat wire core 212 in the XY direction, the inventors selected second flat wire core 212 samples of the same size specification and different hardnesses, tested the force of peeling the second transition layer from the second flat wire core 212 and the torque of bending the second flat wire core 212, and the test results are shown in Table 12.

[0248] The test method for the force of peeling the second transition layer is as follows: a universal tensile testing machine is used, the second flat wire core 212 with the welded second transition layer is fixed on the tensile fixture of the universal tensile testing machine, and the second flat wire core 212 with the second transition layer is stretched at a speed of 50mm / min, and the tensile force value when the second transition layer is finally peeled from the second flat wire core 212 is recorded. In this embodiment, a tensile force value greater than 900N is a qualified value.

[0249] The torque test method for the second flat wire core 212 is as follows: a torque tester is used, and when the second flat wire core 212 is bent by 90° at the same radius and the same speed, the torque value of the deformation of the second flat wire core 212 in the bending process is tested. In this embodiment, a torque value less than 30N·m is a qualified value.

[0250] Table 12: Effect of hardness of second flat wire core on force of peeling electrical energy adapter layer and torque when bending

[0251]

[0252] As can be seen from Table 12, when the hardness of the second flat wire core 212 is less than 8 HV, the pulling force value when the second transition layer is peeled off from the second flat wire core 212 is less than the qualified value, at this time, the second transition layer welded on the second flat wire core 212 is easy to be peeled off from the second flat wire core 212 under the action of external force, thereby failing to protect the second flat wire core 212 and causing the second flat wire core 212 to fail to function, thereby failing to achieve the purpose of electric energy transmission, and in serious cases, causing a short circuit to cause a burning accident. When the hardness of the second flat wire core 212 is greater than 105 HV, because the hardness of the second flat wire core 212 itself is very high, when the second flat wire core 212 needs to be bent, a larger torque is needed to deform the second flat wire core 212, at this time, the torque value does not meet the qualified value requirement. Therefore, the inventors set the hardness of the second flat wire core 212 to be 8 HV-105 HV.

[0253] As can be seen from the data in Table 12, when the hardness of the second flat wire core 212 is 10 HV-55 HV, the pulling force value when the second transition layer is peeled off from the second flat wire core 212 and the torque value of the second flat wire core 212 in the XY direction are both in a good range, therefore, the inventors prefer that the hardness of the second flat wire core 212 be 10 HV-55 HV.

[0254] In an embodiment, the wire clamping terminal 213 is provided with an open groove at the front end, and the distance on the open side of the groove is greater than the distance on the closed side of the groove. During assembly processing, there will be errors, and during installation of the flat terminal 113 and the flat ribbon 11, there will be assembly errors, at this time, the flat terminal 113 and the wire clamping terminal 213 will also have a large assembly error, in order to enable the flat terminal 113 to be conveniently and accurately plugged into the wire clamping terminal 213, a chamfer is arranged at the end of the open side of the groove, which plays a guiding role when the flat terminal 113 is inserted into the groove.

[0255] In an embodiment, as shown in Figure 3 , Figure 8 The wire clamping terminal 213 is sleeved with a clamp 30, and the material of the clamp 30 is a memory alloy. The memory alloy is a kind of intelligent metal with memory, and its microstructure has two relatively stable states. At high temperature, the alloy can be changed into any desired shape, and at lower temperature, the alloy can be stretched, but if it is reheated, it will remember its original shape and return to it. The crystal structure of the memory alloy is different above and below the transformation temperature, but when the temperature changes above and below the transformation temperature, the memory alloy will shrink or expand, causing its shape to change. In some embodiments, the memory alloy is a nickel-titanium alloy.

[0256] In one embodiment, the shape memory alloy has a transformation temperature in the range of 40-70°C, and the clamp 30 is in the expanded state when the temperature of the clamp 30 is below the transformation temperature, and the clamp 30 is in the clamped state when the temperature of the clamp 30 is above the transformation temperature.

[0257] Generally, the transformation temperature is selected to be in the range of 40-70°C. If the transformation temperature is below 40°C, the ambient temperature of the clamp 30 and the wire terminal 213 can reach close to 40°C without passing current, and the clamp 30 is in the clamped state, the strip-shaped recess of the wire terminal 213 is small, and the flat terminal 113 cannot be inserted into the wire terminal 213, which results in that the flat terminal 113 and the wire terminal 213 cannot be connected, and the work cannot be performed.

[0258] At room temperature, the flat terminal 113 and the wire terminal 213 are connected after being inserted into each other, and the current is large because the contact area of the flat terminal 113 and the wire terminal 213 is small when the clamp 30 is in the expanded state at the beginning, which results in that the wire terminal 213 and the clamp 30 start to heat up after being connected. If the transformation temperature is above 70°C, the clamp 30 takes a long time to heat up, the connection structure of the flat terminal 113 and the wire terminal 213 is in the state of large current for a long time, which easily causes electrical aging, and in severe cases, the connection structure of the flat terminal 113 and the wire terminal 213 is overloaded and damaged, which causes unnecessary loss.

[0259] Therefore, generally, the transformation temperature of the shape memory alloy is set to be in the range of 40-70°C.

[0260] The clamp 30 has a memory function, and the strip-shaped recess of the wire terminal 213 is generally in the expanded state below the transformation temperature, and at this time, the flat terminal 113 of the flat ribbon 11 can be connected without insertion force, which facilitates the operator to easily connect the electric appliance. In the work, the wire terminal 213 passes current, and the temperature of the wire terminal 213 gradually rises due to the resistance. When the temperature rises above the transformation temperature, the clamp 30 is radially contracted, the contact area and the contact force of the strip-shaped recess of the wire terminal 213 and the flat terminal 113 of the flat ribbon 11 are increased by the temperature rise, and the contact reliability is improved. Since the insertion force is not required, the work is more relaxed, and the work efficiency is improved.

[0261] In one embodiment, as shown in FIG. 1, the flat terminal 113 of the flat ribbon 11 is connected to the wire terminal 213 of the wire 12. Figure 8As shown, the clamp terminal 213 is sleeved with a clamp 30, the clamp 30 includes a side wall 31 and an elastic unit 32 fixed on the side wall, and the elastic unit 32 is connected with the clamp terminal 213. The clamp 30 applies pressure to the clamp terminal 213 through the elastic unit 32 arranged on the inner wall of the side wall, so that the strip-shaped groove of the clamp terminal 213 can clamp the flat terminal 113 of the flat ribbon 11 more tightly, the contact area of the clamp terminal 213 and the flat terminal 113 is ensured, the contact resistance is reduced, and the conductivity is improved.

[0262] The arrangement of the clamp 30 can ensure that the clamp terminal 213 is connected with the flat terminal 113 tightly.

[0263] Further, the force range of the elastic unit 32 applied to the clamp terminal 213 is 3N-200N.

[0264] In order to verify the influence of the pressure of the elastic unit 32 applied to the clamp terminal 213 on the contact resistance and plugging after the flat terminal 113 with large eccentricity is inserted, the inventor selects the flat terminal 113 and the clamp terminal 213 with the same size, different pressures of the elastic unit 32 applied to the clamp terminal 213, and then selects the flat terminal 113 and the clamp terminal 213 with the same eccentricity for insertion, tests the contact resistance between the terminals after insertion, and tests the proportion of the flat terminal 113 successfully inserted in the multiple plugging experiments, and the test results are shown in Table 13.

[0265] The test method of the contact resistance is as follows: a micro-resistance measuring instrument is used, one end of the micro-resistance measuring instrument is placed on the flat terminal 113, and the other end is placed on the clamp terminal 213, the placement position is the same each time, and then the contact resistance reading on the micro-resistance measuring instrument is read. In this embodiment, the contact resistance greater than 1mΩ is unqualified.

[0266] The test method of the insertion success rate is as follows: the pressure value of each elastic unit 32 applied to the clamp terminal 213 is inserted with 100 flat terminals 113 with the same eccentricity, the number of successful insertion is recorded, and the ratio is multiplied by 100%. In this embodiment, the insertion success rate less than 95% is unqualified.

[0267] Table 13: Influence of different pressures on contact resistance and insertion success rate

[0268]

[0269]

[0270] As shown in Table 13, when the pressure applied by the elastic unit 32 to the wire clamping terminal 213 is less than 3N, although the plugging success rate is qualified, the contact resistance between the flat terminal 113 and the wire clamping terminal 213 is greater than 1mΩ, which is too large; when the pressure applied by the elastic unit 32 to the wire clamping terminal 213 is greater than 200N, the plugging success rate is less than 95%, which cannot meet the application requirements, therefore, the inventor sets the pressure applied by the elastic unit 32 to the wire clamping terminal 213 to be 3N-200N.

[0271] In an embodiment, the elastic unit 32 is an elastic rubber body, a spring or a metal spring. The elastic unit 32 can be an elastic rubber body, which ensures the pressure applied to the wire clamping terminal 213 by relying on the elastic force of the compressed elastic rubber body; the elastic unit 32 can be a compression spring, which ensures the pressure applied to the wire clamping terminal 213 by relying on the elastic force of the compressed compression spring; the elastic unit 32 can also be a metal spring, which is integrally formed with the clamp 30, and can be in the form of a single-end spring with one end fixed and one end free, or in the form of a double-end spring with both ends fixed and a protrusion in the middle, which ensures the pressure applied to the wire clamping terminal 213 by relying on the elastic force of the metal spring itself.

[0272] In an embodiment, as shown in Figure 10 and Figure 13 The female end connecting mechanism 20 has a high-voltage interlock structure 23, which is electrically connected with the interlock connector 13 to form a loop. The high-voltage interlock structure 23 is electrically connected with the interlock connector 13 to form a loop. High-voltage interlocking is a safety design method for monitoring the integrity of a high-voltage loop with a low-voltage signal, which monitors the accidental disconnection of a high-voltage loop to avoid damage to the vehicle in the event of sudden loss of power. In the present embodiment, the high-voltage interlock has one end of the interlock connector 13, which is a U-shaped or V-shaped low-voltage loop with two plugging pins electrically connected, and the other end is provided in the female end connecting mechanism 20, connecting two plugging terminals of the low-voltage loop. The plugging terminals of the high-voltage interlock structure 23 are matched and connected with the plugging pins of the interlock connector 13 to form a low-voltage monitoring loop. When the flat ribbon type connecting mechanism in the present embodiment is accidentally disconnected, the interlock connector 13 and the high-voltage interlock structure 23 will also be disconnected at the same time, and the low-voltage monitoring loop will alarm the central control system, so that the vehicle will not be damaged due to sudden loss of power.

[0273] The embedded high-voltage interlock structure replaces the previous assembled high-voltage interlock, which is fixed in the connecting mechanism by one-piece injection molding, without the need for assembly, reducing costs, and fully meeting the high-voltage interlock effect.

[0274] In an embodiment, the female connection mechanism 20 and / or the male connection mechanism 10 has a sealing structure 40, which can seal the flat terminal 113, the wire clamp terminal 213 and the partial flat ribbon 11 and the double flat ribbon 21 into the connection mechanism, preventing the external dust and water from damaging and corroding the internal conductive mechanism, greatly prolonging the service life of the connection mechanism.

[0275] In an embodiment, the sealing structure 40 is overmolded on the female housing 22 and / or the male housing 12, as shown in FIG. 8. Figure 13 The sealing structure 40 of the connection mechanism is no longer a separate sealing ring, but a secondary injection sealing structure 40 that replaces the traditional sealing ring and can be directly molded on the connection mechanism, with better injection bonding and lower cost.

[0276] Further, the sealing structure 40 is made of rubber or soft glue or silicone. The use of these materials can melt the material by heating and mold it in the corresponding mold by using an injection molding machine, which is simple to process and firmly bonded, can greatly prolong the service life of the sealing connection, in addition, these materials have good elasticity, can be deformed by extrusion when the connection mechanism is assembled, fill the gap, achieve good sealing performance, and the material is resistant to water and oil, which can ensure the sealing structure has a longer service life and safe sealing performance.

[0277] The maximum gap between the sealing structure 40 and the male connection mechanism 10 and / or the female connection mechanism 20 is less than 520 nm.

[0278] In order to verify the influence of the gap between each sealing structure 40 and the adjacent device on the sealing level, the inventors use the dry air method to test the sealing device, by controlling the difference between the internal and external pressure of the tested sample through vacuum or air pressure, if there is a leak, the difference between the internal and external pressure will be reduced. The air pressure change can be detected to detect the sealing performance. The detection medium is dry air, which is non-toxic and harmless, does not damage the tested product, and the detection environment is clean and tidy. Taking the example of the male connection mechanism 10 provided with the sealing structure 40, the inventors completely seal the other connection parts after connecting the male connection mechanism 10 and the female connection mechanism 20, select sealing structures 40 with different sealing degrees, and remove the dry air in the sealing structure 40, so that the air pressure in the sealing structure 40 is lower than the external air pressure. The internal air pressure of the sealing structure 40 is continuously detected, and it is found that the air pressure rises, which is unqualified. The test structure is shown in Table 14.

[0279] Table 14: Influence of the maximum gap between the sealing structure 40 and the male connection mechanism 10 and / or the female connection mechanism 20 on the air pressure change

[0280] Maximum gap (nm) 530 520 500 450 400 350 300 280 260 Does air pressure change? Yes No No No No No No No No

[0281] From Table 14, when the maximum gap between the sealing structure 40 and the male connecting mechanism 10 and / or the female connecting mechanism 20 exceeds 520 nm, the air pressure changes, which means that gas enters the sealing structure 40, and the test fails. Therefore, the inventors select the maximum gap between the sealing structure 40 and the male connecting mechanism 10 and / or the female connecting mechanism to be not less than 520 nm.

[0282] In an embodiment, the female connecting mechanism 20 has at least one temperature measuring structure for measuring the temperature of the double flat cable 21 and / or the wire clamping terminal 213. The temperature measuring structure can be at a certain distance from the double flat cable 21 and / or the wire clamping terminal 213, and the temperature of the double flat cable 21 and / or the wire clamping terminal 213 is measured by heat radiation from the double flat cable 21 and / or the wire clamping terminal 213 to the temperature measuring structure, or the temperature measuring structure includes a conduction element that is in contact with the double flat cable 21 and / or the wire clamping terminal 213, and the temperature of the double flat cable 21 and / or the wire clamping terminal 213 is measured by the temperature transmitted by the conduction element. The temperature is transmitted to the control system to adjust the current passing through the double flat cable 21 and / or the wire clamping terminal 213, so as to adjust the temperature of the female connecting mechanism 20.

[0283] Further, the female connecting mechanism 20 has at least one temperature measuring structure that is in contact with the double flat cable 21 and / or the wire clamping terminal 213 for measuring the temperature of the double flat cable 21 and / or the wire clamping terminal 213. The temperature measuring structure is a temperature sensor that is directly in contact with the double flat cable 21 and / or the wire clamping terminal 213, and the actual temperature of the double flat cable 21 and / or the wire clamping terminal 213 can be directly obtained without the need for calculation, which is simple in structure and more accurate in temperature measurement.

[0284] Further, the female connecting mechanism 20 has at least one temperature measuring structure that is in contact with the double flat cable 21 and / or the wire clamping terminal 213 for measuring the temperature of the double flat cable 21 and / or the wire clamping terminal 213. The temperature measuring structure is a temperature sensor that is directly in contact with the double flat cable 21 and / or the wire clamping terminal 213, and the actual temperature of the double flat cable 21 and / or the wire clamping terminal 213 can be directly obtained without the need for calculation, which is simple in structure and more accurate in temperature measurement.

[0285] In an embodiment, the male connecting mechanism 10 has at least one temperature measuring structure for measuring the temperature of the flat ribbon 11 and / or the flat terminal 113. The temperature measuring structure can be at a distance from the flat ribbon 11 and / or the flat terminal 113, and the temperature of the flat ribbon 11 and / or the flat terminal 113 is measured by heat radiation from the flat ribbon 11 and / or the flat terminal 113 to the temperature measuring structure, or the temperature measuring structure includes a conductive element that is in contact with the flat ribbon 11 and / or the flat terminal 113, and the temperature of the flat ribbon 11 and / or the flat terminal 113 is measured by heat conduction from the conductive element. The temperature is transmitted to the control system to adjust the current passing through the flat ribbon 11 and / or the flat terminal 113, thereby adjusting the temperature of the male connecting mechanism 10.

[0286] In an embodiment, the male connecting mechanism 10 has at least one temperature measuring structure that is in contact with the flat ribbon 11 and / or the flat terminal 113 for measuring the temperature of the flat ribbon 11 and / or the flat terminal 113. The temperature measuring structure is a temperature sensor that is directly in contact with the flat ribbon 11 and / or the flat terminal 113, and the actual temperature of the flat ribbon 11 and / or the flat terminal 113 can be directly obtained without the need for calculation, which is simple in structure and more accurate in temperature measurement.

[0287] In an embodiment, the male connecting mechanism 10 has at least one temperature measuring structure that is located between the two flat ribbons 11 for measuring the temperature of the flat ribbons 11. The temperature measuring structure is placed between the two flat ribbons 11, and the heat conducted by the two flat ribbons 11 can be obtained at the same time, which can balance the heat generated by the two flat ribbons 11, save the number of temperature measuring structures, and directly obtain the highest temperature of the two flat ribbons 11, which can play a good role in temperature control of the flat ribbons 11.

[0288] The temperature measuring structure can be a temperature sensor, which can be an NTC temperature sensor or a PTC temperature sensor, for timely and accurate monitoring of the temperature of the male connecting mechanism 10 or the female connecting mechanism 20.

[0289] The temperature sensor is an NTC temperature sensor or a PTC temperature sensor. The advantages of using these two types of temperature sensors are small size, ability to measure gaps that other thermometers cannot measure, easy to use, resistance value can be selected arbitrarily between 0.1-100kΩ, easy to process into complex shapes, mass production, good stability, strong overload capacity, and suitable for products such as conversion connectors that require small size and stable performance.

[0290] In an embodiment, the male connecting mechanism 10 and the female connecting mechanism 20 are connected by one or more of the following methods: adhesive connection, magnetic connection, bayonet connection, plug-in connection, lock connection, bundling connection, screw connection, rivet connection, and welding connection.

[0291] In the first possible technical solution, an adhesive structure can be adopted, such as an adhesive layer is arranged on the surface to be spliced of the male connecting mechanism 10 and the female connecting mechanism 20, and the two are fixedly connected through adhesion.

[0292] In the second possible technical solution, a magnetic attraction structure can be adopted, such as the surface to be spliced of the male connecting mechanism 10 and the female connecting mechanism 20 is also provided with a magnetic attraction piece, and the two are connected through the magnetic attraction piece, so that the connection is convenient and fast.

[0293] In the third possible technical solution, a plug-in structure can be adopted, the male connecting mechanism 10 is provided with a plug pin, the surface of the female connecting mechanism 20 is provided with a plug slot, the plug pin is inserted into the plug slot to be fixedly connected, so that the male connecting mechanism 10 and the female connecting mechanism 20 are fixedly connected, and the male connecting mechanism 10 and the female connecting mechanism 20 are connected.

[0294] In the fourth possible technical solution, a clamping structure can be adopted, such as a clasp is arranged on the male shielding shell 14 of the male connecting mechanism 10, the female end of the female connecting mechanism 20 is provided with a clamping groove, and the clasp and the clamping groove are assembled to be fixedly connected, so that the male connecting mechanism 10 and the female connecting mechanism 20 are fixedly connected.

[0295] In the fifth possible technical solution, a bolt connection structure can be adopted, the bolt connection structure includes a bolt and a nut, the bolt is fixed on the surface to be spliced of the male connecting mechanism 10, and the nut is arranged on the surface to be spliced of the female connecting mechanism 20 and can rotate; after the bolt and the nut are screwed with each other and tightened, the surfaces to be spliced of the male connecting mechanism 10 and the female connecting mechanism 20 are fixedly connected. The bolt connection structure adopts a bolt and a nut with a minimum size of M3, and the torque of the bolt connection structure when being tightened is 0.2 N·m at least.

[0296] In the sixth possible technical solution, a riveting structure can be adopted, the riveting structure includes a rivet and a fixing hole, the fixing hole is arranged on the surface to be spliced of the male connecting mechanism 10 and the female connecting mechanism 20, the rivet passes through the fixing hole, and the end of the rivet passing through the fixing hole is deformed to make the fixing hole tight, so that the surfaces to be spliced of the male connecting mechanism 10 and the female connecting mechanism 20 are fixedly connected.

[0297] In the seventh possible technical solution, a welding structure can be adopted, such as a welding piece is arranged on the surface to be spliced of the male connecting mechanism 10 and the female connecting mechanism 20, a welding machine is used to melt and connect the welding pieces together, so that the surfaces to be spliced of the male connecting mechanism 10 and the female connecting mechanism 20 are fixedly connected. The welding machine includes a hot melting welding machine and an ultrasonic welding machine.

[0298] In the eighth possible technical solution, a bundling structure can be used, the bundling structure comprising a bundling member, recesses are arranged on the surfaces of the male connecting mechanism 10 and the female connecting mechanism 20, and the bundling member is used to bundle the surfaces of the male connecting mechanism 10 and the female connecting mechanism 20 to be spliced together at the positions of the recesses, so as to fixedly connect the splicing surfaces of the male connecting mechanism 10 and the female connecting mechanism 20. The bundling member comprises a cable tie, a pipe clamp, a hook lock, etc.

[0299] In the ninth possible technical solution, a lock catch structure can be used, the lock catch structure comprising a lock catch member, the lock catch member being arranged at the adjacent surfaces of the surfaces of the male connecting mechanism 10 and the female connecting mechanism 20 to be spliced or being arranged on the surfaces to be spliced, and the splicing surfaces of the male connecting mechanism 10 and the female connecting mechanism 20 are fixedly connected through the lock catch member.

[0300] In an embodiment, the insertion force between the flat terminal 113 and the wire clamping terminal 213 is between 3N and 150N.

[0301] Further, the insertion force between the flat terminal 113 and the wire clamping terminal 213 is between 10N and 95N.

[0302] In order to verify the influence of the insertion force between the flat terminal 113 and the wire clamping terminal 213 on the contact resistance of the flat terminal 113 and the wire clamping terminal 213 and the plugging condition, the inventors select the flat terminal 113 and the wire clamping terminal 213 with the same shape and size, and design the insertion force between the flat terminal 113 and the wire clamping terminal 213 to be different, to observe the contact resistance between the flat terminal 113 and the wire clamping terminal 213 and the condition after multiple pluggings.

[0303] The detection method of the contact resistance is to use a micro-resistance measuring instrument to measure the resistance at the contact position of the flat terminal 113 and the wire clamping terminal 213, and read the value on the micro-resistance measuring instrument, which is the contact resistance between the flat terminal 113 and the wire clamping terminal 213. In this embodiment, the ideal value of the contact resistance is less than 50μΩ.

[0304] The test method of the plugging condition of the flat terminal 113 and the wire clamping terminal 213 is to plug the flat terminal 113 and the wire clamping terminal 213 for 50 times, and observe the number of times of falling off after plugging and the number of times of being unable to plug. The number of times of falling off after plugging is required to be less than 3 times, and the number of times of being unable to plug is required to be less than 5 times.

[0305] Table 15, influence of different insertion forces between the flat terminal 113 and the wire clamping terminal 213 on the contact resistance and the plugging condition:

[0306]

[0307]

[0308] As can be seen from Table 15 above, when the insertion force between the flat terminal 113 and the wire clamping terminal 213 is less than 3 N, the contact resistance between the flat terminal 113 and the wire clamping terminal 213 is higher than the ideal value due to the too small bonding force between the flat terminal 113 and the wire clamping terminal 213, and the number of times of falling after insertion and extraction is more than 3 times, which is an unqualified state. When the insertion force between the flat terminal 113 and the wire clamping terminal 213 is greater than 150 N, the number of times of being unable to insert and extract between the flat terminal 113 and the wire clamping terminal 213 is more than 5 times, which is also an unqualified state. Therefore, the inventor sets the insertion force between the flat terminal 113 and the wire clamping terminal 213 to be between 3 N and 150 N.

[0309] As can be seen from Table 15 above, when the insertion force between the flat terminal 113 and the wire clamping terminal 213 is between 10 N and 95 N, there is neither falling after insertion and extraction nor being unable to insert and extract, and the contact resistance value is within the ideal value range. Therefore, the inventor sets it as preferred that the insertion force between the flat terminal 113 and the wire clamping terminal 213 is between 10 N and 95 N.

[0310] In an embodiment, the contact resistance between the flat terminal 113 and the wire clamping terminal 213 is less than 9 mΩ.

[0311] Further, the contact resistance between the flat terminal 113 and the wire clamping terminal 213 is less than 1 mΩ.

[0312] Generally, a large current needs to be conducted between the flat terminal 113 and the wire clamping terminal 213. If the contact resistance between the flat terminal 113 and the wire clamping terminal 213 is greater than 9 mΩ, a large temperature rise will occur at the contact position, and the temperature will increase over time. The high temperature between the flat terminal 113 and the wire clamping terminal 213 will cause the following two problems. First, the mechanical deformation of the first transition layer and the flat terminal 113 and the mechanical deformation of the second transition layer and the wire clamping terminal 213 will be out of sync due to the different material and thermal expansion rates of the first transition layer and the flat terminal 113 and the second transition layer and the wire clamping terminal 213, resulting in internal stress between the first transition layer and the flat terminal 113 and the second transition layer and the wire clamping terminal 213. In severe cases, the first transition layer and the second transition layer will fall off, and the protection function will not be achieved. Second, the high temperature between the flat terminal 113 and the wire clamping terminal 213 will be conducted to the insulation layer of the flat ribbon 11 and the insulation layer of the double flat ribbon 21, causing the corresponding insulation layer to melt and fail to provide insulation protection. In severe cases, it will cause a short circuit of the line and damage the connection structure, and even cause a fire and other safety accidents. Therefore, the inventor sets the contact resistance between the flat terminal 113 and the wire clamping terminal 213 to be less than 9 mΩ.

[0313] In order to verify the influence of the contact resistance between the flat terminal 113 and the wire clamping terminal 213 on the temperature rise and the conductivity of the connecting mechanism, the inventors select the same flat terminal 113 and the wire clamping terminal 213 with different contact resistances, and test the conductivity and the temperature rise of the plug-in structure,

[0314] The conductivity test is to detect the conductivity of the plug-in structure after the flat terminal 113 and the wire clamping terminal 213 are plugged in and the plug-in structure is powered on. In this embodiment, the ideal value of the conductivity is greater than 99%.

[0315] The temperature rise test is to detect the temperature of the same position of the flat terminal 113 and the wire clamping terminal 213 before and after the temperature is stabilized in a closed environment when the plug-in structure is powered on with the same current, and the absolute value is obtained by taking the difference. In this embodiment, the temperature rise greater than 50K is considered unqualified.

[0316] Table 16, the influence of the contact resistance between the flat terminal 113 and the wire clamping terminal 213 on the conductivity and the temperature rise:

[0317]

[0318] From Table 16 above, when the contact resistance between the flat terminal 113 and the wire clamping terminal 213 is greater than 9mΩ, the temperature rise of the plug-in structure exceeds 50K, and at the same time, the conductivity of the plug-in structure is less than 99%, which does not meet the standard requirements. Therefore, the inventors set the contact resistance between the flat terminal 113 and the wire clamping terminal 213 to be less than 9mΩ.

[0319] Preferably, when the contact resistance between the flat terminal 113 and the wire clamping terminal 213 is less than 1mΩ, the temperature rise of the plug-in structure does not exceed 20K, the temperature rise value is very small, and in addition, the conductivity of the plug-in structure reaches 99.9%, and the conductivity effect is good, so the inventors prefer the contact resistance between the flat terminal 113 and the wire clamping terminal 213 to be less than 1mΩ.

[0320] In one embodiment, the number of insertions and removals between the male terminal connection mechanism 10 and the female terminal connection mechanism 20 is greater than or equal to 9 times. When assembling the flat ribbon connection mechanism with the electrical device, the male terminal connection mechanism 10 and the female terminal connection mechanism 20 need to be assembled together. Subsequent maintenance or component disassembly may require separating the male terminal connection mechanism 10 and the female terminal connection mechanism 20 before insertion and removal. Therefore, the number of insertions and removals between the male terminal connection mechanism 10 and the female terminal connection mechanism 20 cannot be less than 9 times. If it is less than 9 times, the male terminal connection mechanism 10 or the female terminal connection mechanism 20 may be damaged during a disassembly or maintenance process and may not be able to carry the current. In this case, the entire connection mechanism, including the wiring harness, would need to be replaced, which would not only consume maintenance time but also increase maintenance costs. Therefore, regardless of the material selection of the male terminal connection mechanism 10 and the female terminal connection mechanism 20, or the design of the insertion and removal mechanism, locking mechanism, and sealing mechanism between the male terminal connection mechanism 10 and the female terminal connection mechanism 20, they need to undergo at least 9 disassembly and assembly cycles to meet the usage requirements of the connection mechanism.

[0321] In one embodiment, the weight of the male connector is less than or equal to 305g. For example... Figure 1 As shown, the male connector is located above the connection mechanism and is plugged into and fixed to the female connection mechanism 20. When the weight of the male connection mechanism 10 is too large, the female connection mechanism 20 will also receive a large force. When the electrical device vibrates, the entire connection mechanism will vibrate. Due to inertia, the male connection mechanism 10 will be subjected to a large vibration and will make abnormal noise. Abnormal noise is not allowed during the use of the electrical device.

[0322] To verify the effect of the weight of the male end connection mechanism 10 on the abnormal noise of the connection mechanism, the inventors used the same female end connection mechanism 20 and male end connection mechanism 10 samples with different weights, assembled them, installed them on the vibration test bench, and conducted vibration tests. They observed whether the male end connection mechanism 10 produced abnormal noise during the vibration test. The test results are shown in Table 17.

[0323] Table 17 shows the effect of the weight of the male-end connection mechanism 10 on the abnormal noise generated by the connection mechanism.

[0324] Weight (g) 265 275 285 295 305 315 325 335 345 Does it make noise? No No No No No Yes Yes Yes Yes

[0325] As shown in Table 17, when the weight of the male end connection mechanism 10 exceeds 305g, abnormal noise occurs during the vibration test, and the test fails. Therefore, the inventor selected a weight of less than or equal to 305g for the male end connection mechanism 10.

[0326] In an embodiment, the height of the male connecting mechanism along the plug-in direction is less than or equal to 208 mm. After the male connecting mechanism 10 and the female connecting mechanism 20 are assembled, they need to be installed into the electrical device, but generally, the space reserved for the electrical device is small. If the male connecting mechanism 10 is too high, it cannot be installed into the electrical device, or it is also a waste of raw materials. Therefore, the height of the male connecting mechanism 10 needs to be lower than a certain height during design.

[0327] In order to verify the influence of the height of the male connecting mechanism 10 along the plug-in direction on the installation of the connecting mechanism, the inventor uses the same female connecting mechanism 20 and different male connecting mechanism 10 samples with different heights along the plug-in direction to assemble and install into the electrical device, and observes whether the male connecting mechanism 10 interferes with other parts of the electrical device during installation. The test results are shown in Table 18.

[0328] Table 18, Influence of the height of the male connecting mechanism 10 along the plug-in direction on the installation of the connecting mechanism

[0329] Height (mm) 168 178 188 198 208 218 228 238 248 Does it interfere? No No No No No Yes Yes Yes Yes

[0330] From Table 18, when the height of the male connecting mechanism 10 along the plug-in direction is greater than 208 mm, it cannot be installed into the designated position of the electrical device, and the test is unqualified. Therefore, the inventor selects the male connecting mechanism 10 with a height along the plug-in direction less than or equal to 208 mm.

[0331] The application also provides an electrical energy transmission device comprising the flat ribbon connecting mechanism.

[0332] The application also provides a motor vehicle comprising the flat ribbon connecting mechanism and the electrical energy transmission device.

[0333] The flat ribbon connecting mechanism of the application is provided with injection molded male housings 12 and female housings 22, which are simple to process and low in cost, can be directly injection molded in the flat ribbon 11 and insulated, can reduce the installation cost of the flat ribbon 11, and can shape the front end of the flat ribbon 11 into various shapes as required without considering assembly problems, saving processing procedures and reducing processing cost.

[0334] The flat ribbon connecting mechanism of the application has the flat ribbons 11 arranged in layers with appropriate spacing, which can effectively reduce the electromagnetic interference of the flat ribbons 11 on other parts after being electrified, thereby achieving the cancellation of the high-voltage charging wire harness shielding layer structure and meeting the requirements of reducing cost and weight.

[0335] The clamping of the wire clamping terminal 213 by the clamp 30 can increase the pressure of the wire clamping terminal 213 applied to the flat terminal 113, avoid the decrease of the clamping force of the wire clamping terminal 213 due to long-time use, the increase of the contact resistance between the wire clamping terminal 213 and the flat terminal 113, the increase of the conduction current, and the temperature rise of the wire clamping terminal 213 and the flat terminal 113, and the serious combustion accident.

[0336] The embedded high-voltage interlocking structure 23 replaces the previous assembled high-voltage interlocking, is fixed in the connecting mechanism in an integrated injection molding manner, does not need to be assembled, reduces the cost, and fully meets the high-voltage interlocking effect.

[0337] The sealing structure of the connecting mechanism is no longer a separate sealing ring, but a secondary injection sealing structure, which replaces the traditional sealing ring and can be directly formed on the connecting mechanism, has better injection combination, and reduces the cost.

[0338] The temperature measuring mechanism can monitor the temperature of the terminal in the connecting mechanism alone, and avoid the damage of the temperature sensor at other positions, so that the temperature of the connecting mechanism cannot be monitored.

[0339] The above only describes several embodiments of the present application, and those skilled in the art can make various modifications or changes to the embodiments of the present application according to the disclosed content of the application file without departing from the spirit and scope of the present application.

Claims

1. A flat ribbon type connection mechanism comprising a male connection mechanism and a female connection mechanism, characterized in that, The male connecting mechanism comprises a flat ribbon, a flat terminal, and a male housing connected with the flat ribbon and the flat terminal; the female connecting mechanism comprises double flat ribbons, a wire clamp terminal, and a female housing connected with the double flat ribbons and the wire clamp terminal; the male connecting mechanism and the female connecting mechanism are electrically connected through the flat terminal and the wire clamp terminal; the male housing is connected with the female housing to form the flat ribbon connecting mechanism. The flat ribbon comprises a first flat core, and the first flat core and the flat terminal are in an integrated structure. The first flat core front end portion is directly formed into the flat terminal. The double flat ribbon comprises a second flat core, and the second flat core and the wire clamp terminal are in an integrated structure. The flat ribbon is at least two, and the flat ribbons are stacked up and down; the male housing is integrally injection molded between at least part of the flat ribbons and at least part of the flat terminal. The flat ribbon further comprises a first outer insulation layer, and the first outer insulation layer is partially stripped to expose the first flat core; the end of the first outer insulation layer is in or abuts against the male housing. The double flat ribbon is at least two, and the double flat ribbons are stacked up and down; the female housing is integrally injection molded between at least part of the double flat ribbons and at least part of the wire clamp terminal. The double flat ribbon further comprises a second outer insulation layer, and the second outer insulation layer is partially stripped to expose the second flat core; the end of the second outer insulation layer is in or abuts against the female housing. The second flat core is connected by overlapping two flat conductors, and the two flat conductors extend and form the wire clamp terminal at the front end.

2. The flat-band connection mechanism according to claim 1, characterized in that, The length-width ratio of the cross section of the flat ribbon is 1:1-120:

1.

3. The flat-band connection mechanism according to claim 1, characterized in that, The length-width ratio of the cross section of the double flat ribbon is 1:1-120:

1.

4. The flat strap connection mechanism according to claim 1, wherein The hardness of the first flat core is 8HV-105HV.

5. The flat strap connection mechanism according to claim 1, wherein The vertical distance between the first flat cores of the two flat ribbons is less than or equal to 27cm.

6. The flat strap connection mechanism according to claim 1, wherein The vertical distance between the first flat cores of the two flat ribbons is less than or equal to 7cm.

7. The flat-band connection mechanism of claim 1, wherein, The coincidence degree of the first flat cores of the two flat ribbons along the stacking direction is 40%-100%.

8. The flat-band connection mechanism of claim 1, wherein, The male housing covers at least part of the flat terminal.

9. The flat strap connection mechanism according to claim 1, wherein The flat terminal at least partially protrudes from the male housing, or the male housing has a receiving cavity, and the flat terminal at least partially protrudes from the bottom surface of the receiving cavity but does not exceed the male housing.

10. The flat strap connection mechanism according to claim 1, wherein The first flat core and the flat terminal comprise a first bending portion, and the angle of the first bending portion is 0°-180°.

11. The flat strap connection mechanism according to claim 1, wherein The flat terminal is at least partially provided with a first transition layer.

12. The flat-band connection mechanism of claim 11, wherein, The thickness of the first transition layer is 0.3μm to 3000μm.

13. The flat strap connection mechanism according to claim 11, wherein The thickness of the first transition layer is 2.5μm to 1000μm.

14. The flat strap connection mechanism according to claim 1, wherein The end of the flat terminal is provided with a chamfer.

15. The flat strap connection mechanism according to claim 1, wherein The male connecting mechanism comprises an interlocking connector, and the interlocking connector is at least partially integrally injection molded in the male housing.

16. The flat strap connection mechanism according to claim 1, wherein The hardness of the second flat core is 8HV-105HV.

17. The flat strap connection of claim 1, wherein, The vertical distance between the second flat cores of the two double flat ribbons is less than or equal to 27cm.

18. The flat strap connection mechanism of claim 1, wherein, The vertical distance between the second flat cores of the two double flat ribbons is less than or equal to 7cm.

19. The flat strap connection mechanism of claim 1, wherein, The second flat wire core of the two flat ribbon is 40%-100% overlapped along the stacking direction.

20. The flat strap connection mechanism of claim 1, wherein, The wire clamping terminal at least partially protrudes from the outer wall of the female end housing, or the female end housing is provided with an open boss, and the wire clamping terminal is at least partially arranged in the open boss.

21. The flat strap connection mechanism of claim 1, wherein, The second flat wire core front end and the wire clamping terminal comprise a second bending part, and the angle of the second bending part is 0°-180°.

22. The flat strap connection mechanism of claim 1, wherein, The wire clamping terminal is at least partially provided with a second transition layer.

23. The flat-band connection mechanism of claim 22, wherein, The thickness of the second transition layer is 0.3μm to 3000μm.

24. The flat strap connection mechanism of claim 22, wherein, The thickness of the second transition layer is 2.5μm to 1000μm.

25. The flat strap connection mechanism of claim 1, wherein, The wire clamping terminal is provided with an open groove at the front end, and the distance on the open side of the groove is greater than the distance on the closed side of the groove.

26. The flat strap connection of claim 1, wherein, The wire clamping terminal is sleeved with a clamp, and the material of the clamp is a memory alloy.

27. The flat-band connection mechanism of claim 26, wherein, The metamorphic temperature of the memory alloy is set to be in the range of 40℃-70℃, and the clamp is in an expanded state when the temperature of the clamp is lower than the metamorphic temperature; the clamp is in a clamping state when the temperature of the clamp is higher than the metamorphic temperature.

28. The flat strap connection mechanism of claim 26, wherein, The clamp comprises a side wall and an elastic unit fixed on the side wall, and the elastic unit is connected with the wire clamping terminal.

29. The flat strap connection mechanism of claim 28, wherein, The force range of the elastic unit applied to the wire clamping terminal is 3N-200N.

30. The flat strap connection mechanism of claim 28, wherein, The elastic unit is an elastic rubber body, a spring or a metal spring.

31. The flat strap connection mechanism of claim 15, wherein, The female end connecting mechanism has a high-voltage interlocking structure, and the high-voltage interlocking structure is electrically connected with the interlocking connector to form a loop.

32. The flat strap connection mechanism of claim 1, wherein, The female end connecting mechanism and / or the male end connecting mechanism has a sealing structure.

33. The flat strap connection of claim 32, wherein, The sealing structure is a secondary injection molding on the female end housing and / or the male end housing.

34. The flat strap connection of claim 1, wherein, The female end connecting mechanism has at least one temperature measuring structure for measuring the temperature of the double flat ribbon and / or the wire clamping terminal.

35. The flat strap connection of claim 1, wherein, The female end connecting mechanism has at least one temperature measuring structure, and the temperature measuring structure is in contact with the double flat ribbon and / or the wire clamping terminal to measure the temperature of the double flat ribbon and / or the wire clamping terminal.

36. The flat strap connection of claim 1, wherein, The female end connecting mechanism has at least one temperature measuring structure, and the temperature measuring structure is located between the double flat ribbons to measure the temperature of the double flat ribbons.

37. The flat strap connection of claim 1, wherein, The male end connecting mechanism has at least one temperature measuring structure for measuring the temperature of the flat ribbon and / or the flat terminal.

38. The flat strap connection of claim 1, wherein, The male end connecting mechanism has at least one temperature measuring structure, and the temperature measuring structure is in contact with the flat ribbon and / or the flat terminal to measure the temperature of the flat ribbon and / or the flat terminal.

39. The flat strap connection of claim 1, wherein, The male end connecting mechanism has at least one temperature measuring structure, and the temperature measuring structure is located between the flat ribbons to measure the temperature of the flat ribbons.

40. The flat strap connection mechanism of claim 1, wherein, The male end connecting mechanism and the female end connecting mechanism are connected by one or more of the following connection modes: adhesive connection, magnetic attraction connection, bayonet connection, plug-in connection, lock connection, bundling connection, screw connection, rivet connection and welding connection.

41. The flat strap connection of claim 1, wherein, The plug-in force between the flat terminal and the wire clamping terminal is between 3N-150N.

42. The flat strap connection of claim 1, wherein, The plug-in force between the flat terminal and the wire clamping terminal is between 10N-130N.

43. The flat strap connection mechanism of claim 1, wherein, The contact resistance between the flat terminal and the wire clamping terminal is less than 9 mΩ.

44. The flat strap connection mechanism of claim 1, wherein, The contact resistance between the flat terminal and the wire clamping terminal is less than 1 mΩ.

45. The flat strap connection mechanism of claim 1, wherein, The number of times of plugging between the male connecting mechanism and the female connecting mechanism is greater than or equal to 9 times.

46. The flat strap connection of claim 1, wherein, The weight of the male connecting mechanism is less than or equal to 305 g.

47. The flat strap connection of claim 1, wherein, The height of the male connecting mechanism in the plugging direction is less than or equal to 208 mm.

48. An electrical power transfer device, characterized by A flat ribbon connecting mechanism according to any one of claims 1-47.

49. A motor vehicle characterized by A flat ribbon connecting mechanism according to any one of claims 1-47.

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