Wire harness assembly, airtightness detection method thereof and vehicle

Abstract

The present disclosure relates to a wiring harness assembly, a method for detecting air tightness thereof and a vehicle, and belongs to the technical field of vehicles. The wiring harness assembly comprises a first air guide member and a loop wiring harness. The first end of the first air guide member is provided with a first air tightness interface. The loop wiring harness comprises at least one first cable, and the inside of the first insulating sheath of the at least one first cable is in communication with the second end of the first air guide member. The first air tightness interface is located in a dry area of the vehicle, and the first air guide member is adapted to be in communication with an air tightness testing device through the first air tightness interface. The wiring harness assembly, the method for detecting air tightness thereof and the vehicle of the present disclosure can conveniently realize air tightness detection of the loop wiring harness.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and in particular to a wiring harness assembly, a method for testing the airtightness of the same, and a vehicle. Background Technology

[0002] As vehicles become increasingly automated and intelligent, with more and more features and configurations, the number of vehicle wiring harness assemblies and their corresponding connectors is also increasing. When a vehicle experiences problems such as connector aging, poor contact, or detachment or cracking of the wiring harness sheath, water ingress due to poor sealing can occur, posing a safety risk. Therefore, airtightness testing of the wiring harness assemblies and their corresponding connectors is necessary. However, current airtightness testing methods often require removing the wiring harness connectors from the vehicle for testing, or testing them before installation, which doesn't accurately reflect the true sealing performance of the wiring harness assembly within the vehicle. Furthermore, the testing process is complex, requiring individual testing of each connector, which is time-consuming and labor-intensive. Summary of the Invention

[0003] Therefore, this disclosure provides a wiring harness assembly, its airtightness testing method, and a vehicle, which can conveniently perform airtightness testing on the return wiring harness. The technical solution is as follows: In a first aspect, a wiring harness assembly is provided, the wiring harness assembly including a first air guide and a return line harness; The first end of the first air guide has at least one first airtight interface; The return line harness includes at least one first cable, and the interior of the first insulating sheath of at least one first cable is connected to the second end of the first air guide; The first air guide is adapted to be connected to the airtightness testing device through the at least one first airtight interface.

[0004] In some possible implementations, the first air guide includes at least one second cable; The interior of the second insulating sheath of each of the second cables is connected to one of the first airtight interfaces, and the interior of each of the second insulating sheaths is also connected to the interior of at least one of the first insulating sheaths.

[0005] In some possible implementations, the first air guide includes a first interface and a plurality of first airtight interfaces, wherein the plurality of first airtight interfaces are integrated into the first interface.

[0006] In some possible implementations, the first air guide includes a plurality of first interface elements, each of which integrates a plurality of first airtight interfaces.

[0007] In some possible implementations, the wiring harness assembly further includes a first wiring harness sleeve that wraps around the first air guide.

[0008] In some possible implementations, the first interface element has a protective cover that can be detachably covering each of the first airtight interfaces.

[0009] In a second aspect, a method for detecting the airtightness of a wire harness assembly is provided. The airtightness detection method is used to detect the airtightness of any of the wire harness assemblies described in the first aspect, and includes the following steps: The first airtight interface of the wire harness assembly is sealed inside the sealing structure of the airtightness testing device; Inflate the sealing structure with air or evacuate the sealing structure.

[0010] In some possible implementations, the airtightness detection method further includes the following steps: After inflating the sealing structure with air or evacuating the sealing structure, check whether the pressure value inside the sealing structure is abnormal.

[0011] In some possible implementations, the airtightness detection method further includes the following steps: After sealing the first airtight interface inside the sealing structure of the airtightness testing device, first immerse the return line harness of the wire harness assembly in water, then inflate the sealing structure with air and check whether air bubbles appear in the water.

[0012] Thirdly, a vehicle is provided, the vehicle including any of the wiring harness assemblies described in the first aspect.

[0013] In the scheme disclosed herein, the first air guide is connected to the interior of the first insulating sheath of the first cable of the return wiring harness. The airtightness testing device can conveniently perform airtightness testing of the return wiring harness by connecting to the first airtight interface and introducing gas into the interior of the first insulating sheath or by evacuating the interior of the first insulating sheath through the first air guide. Furthermore, during testing, the sealing connectors of the return wiring harness remain connected to the various electrical components of the vehicle, and the test results accurately reflect the airtightness of the wiring harness assembly in the vehicle. Simultaneously, the first airtight interface of the first air guide can be located in a dry area of ​​the vehicle; therefore, when airtightness testing of the return wiring harness is required, the airtightness testing device can connect to the first airtight interface in a dry area. Thus, the airtightness testing device can conveniently perform airtightness testing of the return wiring harness. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a first air guide and a first insulating outer sheath provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of a first air guide and a first interface provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of the structure of a wire harness assembly provided in an embodiment of this disclosure; Figure 4 This is a schematic diagram of another angle showing the connection between the first air guide and the first interface component according to an embodiment of this disclosure; Figure 5 This is a schematic diagram of the connection structure of a first interface device provided in an embodiment of this disclosure; Figure 6 This is a schematic diagram of the steps of a wire harness assembly airtightness testing method provided in an embodiment of this disclosure; Figure 7 This is a schematic diagram of the connection between an airtightness testing device and a wiring harness assembly provided in an embodiment of this disclosure; Figure 8 This is a schematic diagram of the steps of another method for testing the airtightness of a wire harness assembly provided in this embodiment of the present disclosure; Figure 9 This is a schematic diagram of the connection between another airtightness testing device and a wiring harness assembly provided in an embodiment of this disclosure.

[0016] Explanation of reference numerals in the attached figures 100. Dry area; 200. Wet area; 1. First air guide component; 11. First airtight interface; 12. Second cable; 121. Second insulating sheath; 122. Second conductor; 13. First interface component; 131. Protective cover; 2. Return cable harness; 21. First cable; 211. First insulating sheath; 212. First conductor; 22. Sealing connector; 23. Third cable harness sleeve; 3. Airtightness testing device; 31. Sealing structure; 32. Air pressure controller; 33. Pressure gauge; 34. Second air guide component; 341. Second interface component; 3411. Second groove; 342. Second airtight interface; 5. First cable harness sleeve; 6. Second cable harness sleeve; 7. Fixing component. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Generally, a vehicle can be divided into two areas based on whether it will experience water exposure, splashing, or water accumulation in daily use: the dry area (100%) and the wet area (200%). The dry area (100%) is a sealed area that is rarely exposed to water or rain during normal use, effectively preventing rain splashes. This includes the driver's seat, rear passenger space, dashboard, headliner, upper floor, interior trim of the trunk and luggage compartment, and the inner side of each door panel. The wet area (200) is the area constantly exposed to the elements, where washing, rain, and driving through standing water can cause water exposure, splashing, or immersion. This includes the engine compartment, chassis, suspension, wheel arches, under door sills, the space between the glass and door panel in the door panels, the inner sides of the front and rear bumpers, taillight or fog light mounting areas, sunroof drainage channels, windshield drainage channels, and the interior of the rear wheel well liner.

[0019] Generally, the return line harness 2 located in the wet area 200 needs to be sealed and waterproofed. At the same time, it also needs to be electrically connected to various electrical components of the vehicle through the sealed connector 22 to prevent short circuits.

[0020] Firstly, this embodiment relates to a wire harness assembly, as shown in the reference... Figure 1 As shown, the wiring harness assembly includes a first air guide 1 and a return line harness 2.

[0021] Among them, combined Figure 2 As shown, the first end of the first air guide 1 has at least one first airtight interface 11. For example, the first end of the first air guide 1 may have one, two, three, or four first airtight interfaces 11, etc. The number of first airtight interfaces 11 can be selected according to actual needs, and this embodiment does not limit this.

[0022] Continue to refer to Figure 1 As shown, the return line harness 2 includes at least one first cable 21. For example, each return line harness 2 may include one, two, or three first cables 21, etc. The number of first cables 21 can be selected according to actual needs, and this embodiment does not limit this. Each first cable 21 of the return line harness 2 can be connected to a corresponding sealed connector 22.

[0023] Combination Figures 1 to 3As shown, the interior of the first insulating sheath 211 of at least one first cable 21 is connected to the second end of the first air guide 1. For example, when the return line harness 2 includes multiple first cables 21, the interior of the first insulating sheath 211 of one first cable 21 may be connected to the second end of the first air guide 1, or the interior of the first insulating sheath 211 of two, three, or four first cables 21 may be connected to the second end of the first air guide 1, or the interior of each first insulating sheath 211 in the return line harness 2 may be connected to the second end of the first air guide 1.

[0024] Generally, the first cable 21 may include a first insulating sheath 211 and a first conductor 212. The first insulating sheath 211 wraps around the first conductor 212, providing insulation and protection for the first conductor 212. For example, the first air guide 1 may include at least one hollow tube. The first end of each hollow tube can be connected to a first airtight interface 11. An opening can be peeled out on the first insulating sheath 211. The second end of each hollow tube can be aligned and sealed with at least one opening of the first insulating sheath 211, thereby enabling communication between the interior of the first insulating sheath 211 and the second end of the first air guide 1. Gas inside the first air guide 1 can flow into the interior of the first insulating sheath 211 and then through the first insulating sheath 211 to the interface between the sealing connector 22 and the corresponding electrical component. Gas at the interface between the sealing connector 22 and the corresponding electrical component, as well as gas inside the first insulating sheath 211, can also flow into the first air guide 1.

[0025] The first air guide 1 is adapted to be connected to the air tightness testing device 3 through at least one first airtight interface 11. For example, the first airtight interface 11 can be located in the dry area 100 of the vehicle. When performing air tightness testing on the return line harness 2, the air tightness testing device 3 can easily connect with the first air guide 1 in the dry area 100 to fill the first air guide 1 with air or to evacuate the first air guide 1, thus conveniently realizing the air tightness testing of the return line harness 2.

[0026] For example, the airtightness testing device 3 may include an air pump, which can inflate the first air guide 1 through the first airtight port 11, thereby filling the air to the interior of the first insulating outer sheath 211 and the interface between the sealing connector 22 and the corresponding electrical component. Thus, the airtightness of the return line harness 2 can be determined by whether there is air leakage at the interior of the first insulating outer sheath 211 and the interface between the sealing connector 22 and the corresponding electrical component. Specifically, if there is air leakage at the interior of the first insulating outer sheath 211 or at the interface between the sealing connector 22 and the corresponding electrical component, it indicates that the airtightness of the return line harness 2 is poor and requires repair or replacement. If there is no air leakage at the interior of the first insulating outer sheath 211 and the interface between the sealing connector 22 and the corresponding electrical component, it indicates that the airtightness of the return line harness 2 is good.

[0027] For example, the airtightness testing device 3 may include a vacuum pump, which can extract gas from the first air-conducting component 1 via the first airtight interface 11, thereby extracting gas from the interior of the first insulating outer sheath 211 and the interface between the sealing connector 22 and the corresponding electrical component. Thus, the airtightness of the return loop harness 2 can be determined by judging whether the vacuum level inside the first insulating outer sheath 211, the vacuum level at the interface between the sealing connector 22 and the corresponding electrical component, or the vacuum level inside the first air-conducting component 1 is normal. Specifically, if the vacuum level inside the first insulating outer sheath 211, the vacuum level at the interface between the sealing connector 22 and the corresponding electrical component, or the vacuum level inside the first air-conducting component 1 decreases too quickly or fails to reach the set value, it indicates that the airtightness of the return loop harness 2 is poor and requires repair or replacement. If the rate of decrease of the vacuum level inside the first insulating outer sheath 211, the vacuum level at the interface between the sealing connector 22 and the corresponding electrical component, or the vacuum level inside the first air-conducting component 1 is within the expected range and reaches the set value, it indicates that the airtightness of the return loop harness 2 is good.

[0028] As described above, the first air guide 1 is internally connected to the first insulating sheath 211 of the first cable 21 of the return wiring harness 2. The airtightness testing device 3 can conveniently perform airtightness testing on the return wiring harness 2 by connecting to the first airtightness interface 11 and introducing gas into the interior of the first insulating sheath 211 through the first air guide 1 or by evacuating the interior of the first insulating sheath 211. Furthermore, during testing, the sealing connector 22 of the return wiring harness 2 remains connected to the various electrical components of the vehicle, and the test results accurately reflect the airtightness of the wiring harness assembly on the vehicle. Simultaneously, the first airtightness interface 11 of the first air guide 1 can be located in the dry area 100 of the vehicle. Therefore, when airtightness testing of the return wiring harness 2 is required, the airtightness testing device 3 can connect to the first airtightness interface 11 in the dry area 100. Thus, the airtightness testing device 3 can conveniently perform airtightness testing on the return wiring harness 2.

[0029] In some examples, reference Figure 1 As shown, the first air guide 1 includes at least one second cable 12. The interior of the second insulating sheath 121 of each second cable 12 is connected to a first airtight interface 11, and the interior of each second insulating sheath 121 is also connected to the interior of at least one first insulating sheath 211.

[0030] For example, the second cable 12 may include a second insulating sheath 121 and a second conductor 122. The second conductor 122 can be supported inside the second insulating sheath 121, providing support for the second insulating sheath 121. The second cable 12 can correspond one-to-one with the first cable 21. The second end port of the second insulating sheath 121 can align with the opening of the first insulating sheath 211 and be sealed and fixed by heat fusion sealing to avoid affecting the airtightness of the first insulating sheath 211.

[0031] In this way, the second conductor 122 can prevent the second insulating outer sheath 121 from becoming blocked due to compression, which would affect the smoothness of gas flow within the second insulating outer sheath 121 and thus the accuracy of the airtightness test.

[0032] In some examples, reference Figure 1 As shown, the first conductor 212 of the first cable 21 is connected to the second conductor 122 of the corresponding second cable 12. For example, the first conductor 212 and the second conductor 122 can be connected by welding. This improves the stability of the connection between the first air guide 1 and the first cable 21, and extends its service life.

[0033] In some examples, reference Figure 2 As shown, the first air guide 1 includes a first interface 13 and a plurality of first airtight interfaces 11. For example, the first air guide 1 may include two, three, four, or five first airtight interfaces 11, etc. The specific number of first airtight interfaces 11 can be selected according to actual needs, and this embodiment does not limit it.

[0034] Continue to refer to Figure 2 and Figure 4As shown, multiple first airtight interfaces 11 are integrated into the first interface component 13. For example, the first interface component 13 may have multiple first through holes to form multiple first airtight interfaces 11. The second end of each first hollow pipe of the first air guide 1 or the second end of each second cable 12 may be fixedly connected to a first airtight interface 11 by means of interference fit, bonding, etc., thereby forming a corresponding first airtight interface 11 on the first interface component 13. The first interface component 13 may be fixed in the dry area 100 of the vehicle by means of snap-fit, bolts, etc. For example, the first interface component 13 may be located in areas such as the driver's seat, rear passenger space, inside the dashboard, headliner, upper part of the vehicle floor, inside the trunk interior, and inside the interior panels of each door.

[0035] During airtightness testing, the airtightness testing device 3 can be connected to the first interface component 13. Since each first interface component 13 integrates multiple first airtight interfaces 11, gas can be simultaneously filled into the interior of the first insulating outer sheath 211 corresponding to the multiple first airtight interfaces 11, or a vacuum can be applied to the interior of the first insulating outer sheath 211 corresponding to the multiple first airtight interfaces 11. This facilitates the simultaneous airtightness testing of a larger number of return line bundles 2, improving the efficiency of the airtightness testing.

[0036] In some examples, the second end of each first hollow conduit or the second end of each second cable 12 may have at least one branch, each branch being in communication with the interior of a first insulating sheath 211.

[0037] For example, when the second end of the first air guide 1 has a branch, the second end of each first air guide 1 can communicate with the interior of a first insulating outer sheath 211.

[0038] For example, when the second end of the first air guide 1 has two branches, the second end of each first air guide 1 can communicate with the interior of the two first insulating outer sheaths 211.

[0039] For example, when the second end of the first air guide 1 has three branches, the second end of each first air guide 1 can communicate with the interior of the three first insulating outer sheaths 211.

[0040] In some examples, reference Figure 3 As shown, the first air guide 1 includes multiple first interface components 13, and each first interface component 13 integrates multiple first airtight interfaces 11. For example, the first air guide 1 may include two, three, four, or five first interface components 13, etc. The number of first interface components 13 can be selected according to actual needs, and this embodiment does not limit this.

[0041] In this way, a greater number of first interface components 13 can be connected to a greater number of second cables 12, thereby enabling airtightness testing of a greater number of return cable bundles 2.

[0042] In some examples, reference Figures 1 to 3 As shown, the wiring harness assembly also includes a first wiring harness sleeve 5, which wraps around the first air guide 1. The first wiring harness sleeve 5 can fix multiple first cables or multiple first hollow tubes of the first air guide 1 together, avoiding the time and effort required for troubleshooting, repair, and disassembly / reassembly of multiple first cables or multiple first hollow tubes due to their scattered arrangement.

[0043] In some examples, reference Figure 2 As shown, each first cable or each first hollow tube connected to the same first interface component 13 is wrapped in the same first wire harness sleeve 5, thereby facilitating the connection between the first interface component 13 and each first cable or each first hollow tube.

[0044] In some examples, reference Figure 5 As shown, the wire harness assembly may also include a second wire harness sleeve 6. The second wire harness sleeve 6 can wrap around the multiple first wire harness sleeves 5 to fix the multiple first wire harness sleeves 5, which helps to further reduce the degree of wire harness tangling and facilitates fault diagnosis, maintenance and parts disassembly and assembly.

[0045] In some examples, reference Figure 1 As shown, the return cable harness 2 may also include a third cable harness sleeve 23. The third cable harness sleeve 23 can wrap around the corresponding multiple first cables 21 to uniformly fix the return cable harness 2 and avoid the return cable harness 2 being arranged in a messy manner.

[0046] In some examples, reference Figure 3 and Figure 5 As shown, the wiring harness assembly may also include multiple fasteners 7. The first air guide 1, the first wiring harness sleeve 5 or the second wiring harness sleeve 6, and the return line harness 2 can each be secured in their respective positions on the vehicle by at least one fastener 7. For example... Figure 5 As shown, the second wiring harness sleeve 6 can be secured in the dry area 100 of the vehicle via a fastener 7. For example... Figure 3 As shown, the third wiring harness sleeve 23 can be secured in the wet area 200 of the vehicle using multiple fasteners 7, thereby securing the return wiring harness 2. For example, the return wiring harness 2 can be secured in areas such as the engine compartment, vehicle chassis, suspension, door sheet metal cavities, inner sides of front and rear bumpers, and taillight or fog light mounting positions using multiple fasteners 7. This helps to prevent the first air guide 1, first wiring harness sleeve 5, second wiring harness sleeve 6, and return wiring harness 2 from shaking and causing abnormal noises in the vehicle. The fasteners 7 can be bolts, clips, or cable ties, etc.

[0047] In some examples, reference Figure 5 As shown, the first interface component 13 has a protective cover 131, which is removable and covers each of the first airtight interfaces 11. For example, in Figure 5 In this configuration, the first through hole can pass through the first interface member 13 in a left-right direction. Each first cable or each first hollow tube of the first air guide member 1 can connect to the first through hole from the right side of the first interface member 13. The protective cover 131 can be placed on the left side of the first interface member 13 to cover each first airtight interface 11. For example, the protective cover 131 can have a first groove, and the left side of the first interface member 13 can be inserted into the first groove of the protective cover 131.

[0048] Therefore, when there is no need to test the airtightness of the return loop harness 2, the protective cover 131 can protect the first airtight interface 11 from dust and the first interface component 13 from airtightness, so as to avoid the airtightness test being unable to be carried out normally due to blockage of the first airtight interface 11 or damage to the first interface component 13 when airtightness needs to be tested.

[0049] In some examples, the first interface element 13 and the protective cover 131 can be detachably fixedly connected by a snap fastener.

[0050] In some examples, the shape of the first groove can match the shape of the first interface member 13, enabling a relatively reliable assembly between the first groove and the first interface member 13. For example, the first groove and the first interface member 13 can be a transition fit.

[0051] In this embodiment, the first air guide 1 is connected to the return cable harness 2. The first airtight interface 11 of the first air guide 1 can be located in the dry area 100 of the vehicle. When it is necessary to perform airtightness testing on the return cable harness 2, the airtightness testing device 3 can be connected to the first airtight interface 11 in the dry area 100. Thus, the airtightness testing device 3 can conveniently introduce gas into the interior of the first insulating sheath 211 of the first cable 21 or perform vacuum treatment on the interior of the first insulating sheath 211 via the first air guide 1 to achieve airtightness testing of the return cable harness 2.

[0052] Secondly, this embodiment also provides a method for detecting the airtightness of a wire harness assembly, referring to... Figure 6 or Figure 8 As shown, the airtightness testing method is used to test the airtightness of any wire harness assembly in the first aspect, and includes the following steps: The first step 101 includes: sealing the first airtight interface 11 of the wire harness assembly inside the sealing structure 31 of the airtightness testing device 3.

[0053] For example, in Figure 7The airtightness testing device 3 may further include a sealing structure 31, a pressure controller 32, and a pressure gauge 33. The sealing structure 31 may be a sealed box, container, or cylinder. The sealing structure 31 may have a second through-hole connecting the inside and outside. A first interface member 13 with a first airtight interface 11 can be inserted into the second through-hole of the sealing structure 31, allowing the first airtight interface 11 to communicate with the interior of the sealing structure 31. The shape of the second through-hole matches the shape of the first interface member 13, ensuring the airtightness of the sealing structure 31 after the first interface member 13 is inserted into the through-hole. The pressure controller 32 can communicate with the interior of the sealing structure 31 via a pipe. The pressure gauge 33 can be fixedly connected to the sealing structure 31 by bolts, welding, or other methods to detect the air pressure inside the sealing structure 31.

[0054] The second step 102 includes: filling the sealing structure 31 with gas or evacuating the sealing structure 31.

[0055] For example, when the pressure controller 32 is an air pump, it can inflate the sealed structure 31 through the pipeline and sequentially inflate the first air-conducting component 1, the interior of the first insulating outer sheath 211, and the interface between the sealing connector 22 and the corresponding electrical component through the first airtight interface 11, until the pressure value detected by the pressure gauge 33 reaches the first set value, at which point inflation can be stopped. Then, it can be observed whether the pressure value of the pressure gauge 33 remains essentially constant or whether the rate of decrease is below the first threshold. If the pressure value of the pressure gauge 33 decreases too quickly or fails to reach the first set value, it indicates that there is air leakage inside the first insulating outer sheath 211 or at the interface between the sealing connector 22 and the corresponding electrical component, and the airtightness of the return line harness 2 is poor. Otherwise, it indicates that there is no air leakage inside the first insulating outer sheath 211 or at the interface between the sealing connector 22 and the corresponding electrical component, and the airtightness of the return line harness 2 is good. The first set value is a positive pressure value.

[0056] For example, when the pressure controller 32 is a vacuum pump, it can extract gas from the sealed structure 31 through the pipeline until the pressure value detected by the pressure gauge 33 reaches the second set value, at which point it can stop pumping. Then, it can be observed whether the pressure value of the pressure gauge 33 remains essentially constant or whether the rate of increase is above the second threshold. If the pressure value of the pressure gauge 33 rises too quickly or the pressure value detected by the pressure gauge 33 fails to reach the second set value, it indicates that there is air leakage inside the first insulating outer sheath 211 or at the interface between the sealing connector 22 and the corresponding electrical component, indicating poor airtightness of the return line harness 2. Otherwise, it indicates that there is no air leakage inside the first insulating outer sheath 211 or at the interface between the sealing connector 22 and the corresponding electrical component, indicating good airtightness of the return line harness 2. The second set value is a negative pressure value.

[0057] As described above, in this embodiment, when performing airtightness testing on the wet area wiring harness circuit 2, the first air guide 1 is connected to at least one return wiring harness 2. Since the first airtight interface 11 of the first air guide 1 is located in the dry area 100 of the vehicle, the airtightness testing device 3 can connect to the first airtight interface 11 in the dry area 100 when airtightness testing of the return wiring harness 2 is required. Therefore, the airtightness testing device 3 can conveniently introduce gas into the interior of the first insulating sheath 211 of the first cable 21 via the first air guide 1 or perform vacuum treatment on the interior of the first insulating sheath 211 to achieve airtightness testing of the return wiring harness 2.

[0058] In some examples, after filling the sealing structure 31 with gas or evacuating the sealing structure 31, refer to Figure 6 As shown, the airtightness testing method for the wiring harness assembly also includes a third step 103, which includes: detecting whether the pressure value inside the sealing structure 31 is abnormal.

[0059] If the pressure value inside the sealing structure 31 fails to reach the first set value when the air pump inflates it, or if the pressure value detected by the pressure gauge 33 drops too quickly after the air pump inflates the sealing structure 31 to the first set value and then stops inflating, this indicates that the pressure value inside the sealing structure 31 is abnormal; otherwise, it indicates that the pressure value inside the sealing structure 31 is normal.

[0060] If the pressure value detected by pressure gauge 33 fails to reach the second set value when the vacuum pump extracts gas from the sealing structure 31, or if the pressure value detected by pressure gauge 33 rises too quickly after the vacuum pump extracts gas from the sealing structure 31 until the pressure value detected by pressure gauge 33 reaches the second set value and then stops pumping, this indicates that the pressure value inside the sealing structure 31 is abnormal; otherwise, it indicates that the pressure value inside the sealing structure 31 is normal.

[0061] In some examples, reference Figure 8 As shown, the airtightness testing method also includes the following steps: Step 4, 104, includes immersing the return line harness 2 of the harness assembly in water.

[0062] The fourth step 104 may be located between the first step 101 and the second step 102, and the second step 102 includes: inflating the sealing structure 31 with air.

[0063] For example Figure 3 As shown, the airtightness testing device 3 may include a pressure controller 32 and a second air guide 34. The second air guide 34 may include a second interface 341, at least one second airtight interface 342, and at least one second hollow conduit or third cable. The first end of the second air guide can be connected to the pressure controller 32 through at least one second airtight interface 342, and each second airtight interface 342 can be integrated into the second interface 341. For example, in... Figure 9 In this design, the surface of the second interface component 341 may have a second groove 3411, and the second interface component 341 may have multiple third through holes extending from bottom to top through the bottom of the second groove 3411 to form multiple second airtight interfaces 342. Each second airtight interface 342 can be fitted with a second hollow conduit or a third cable and fixedly connected by interference fit or bonding. The second airtight interfaces 342 correspond one-to-one with the first airtight interfaces 11. When performing airtightness testing, refer to... Figure 3 As shown, the first interface component 13 can be inserted into the second groove 3411, and each second airtight interface 342 is connected to the corresponding first airtight interface 11.

[0064] The second groove 3411 and the first interface piece 13 can be sealed and fixedly connected by an interference fit. Alternatively, the second interface piece 341 and the first interface piece 13 can be detachably fixedly connected by a snap-fit. The inner shape of the second groove 3411 matches the shape of the first interface piece 13, so that when the first interface piece 13 is inserted into the second groove 3411, a sealed space can be formed between the first interface piece 13 and the first interface piece 13, thus forming a sealing structure 31. When performing airtightness testing on the wet area wiring harness circuit 2, the air pressure controller 32 can be an air pump, which can inflate each first air guide piece 1 and its corresponding circuit harness 2 through the second air guide piece 34.

[0065] Step 5, 105, includes checking for air bubbles in the water.

[0066] When no bubbles appear in the water, it indicates that there is no air leakage in return loop 2 and its airtightness is good. When bubbles appear in the water, it indicates that there is an air leakage in return loop 2 and its airtightness is poor. Furthermore, based on the location of the bubbles in the water, the location of the air leakage in return loop 2 can be determined, thereby improving the speed of identifying the location of the airtightness defect in return loop 2, which in turn facilitates the rapid inspection, maintenance, and replacement of return loop 2.

[0067] In some examples, the second airtight interface 342 and the corresponding first airtight interface 11 can be mated together to achieve communication.

[0068] In some examples, step 104 may also include: agitating the water body immersing the return line bundle 2. For example, the water body immersing the return line bundle 2 may be stirred. This allows the operating conditions during the airtightness test to more closely resemble the operating conditions of the vehicle, improving the accuracy of the airtightness test.

[0069] In this embodiment, the first air guide 1 is connected to the return cable harness 2. The first airtight interface 11 of the first air guide 1 can be located in the dry area 100 of the vehicle. When it is necessary to perform airtightness testing on the return cable harness 2, the airtightness testing device 3 can be connected to the first airtight interface 11 in the dry area 100. Thus, the airtightness testing device 3 can conveniently introduce gas into the interior of the first insulating sheath 211 of the first cable 21 or perform vacuum treatment on the interior of the first insulating sheath 211 via the first air guide 1 to achieve airtightness testing of the return cable harness 2.

[0070] Thirdly, this embodiment also provides a vehicle that includes any of the wiring harness assemblies described in the first aspect. The vehicle in this embodiment can be a pure electric vehicle, a gasoline-powered vehicle, or a hybrid vehicle, etc.

[0071] In this embodiment, the first air guide 1 is internally connected to the first insulating sheath 211 of the first cable 21 of the return wiring harness 2. The airtightness testing device 3 can conveniently perform airtightness testing on the return wiring harness 2 by connecting to the first airtight interface 11 and introducing gas into the interior of the first insulating sheath 211 through the first air guide 1 or by evacuating the interior of the first insulating sheath 211. Furthermore, during testing, the sealing connector 22 of the return wiring harness 2 remains connected to the various electrical components of the vehicle, and the test results accurately reflect the airtightness of the wiring harness assembly on the vehicle. Simultaneously, the first airtight interface 11 of the first air guide 1 can be located in the dry area 100 of the vehicle. Therefore, when airtightness testing of the return wiring harness 2 is required, the airtightness testing device 3 can connect to the first airtight interface 11 in the dry area 100. Thus, the airtightness testing device 3 can conveniently perform airtightness testing on the return wiring harness 2.

[0072] In some examples, due to the large number of wiring harnesses in the vehicle wiring harness assembly and their connection to different electrical devices, some connectors and wiring harnesses may be obscured by other components, making it impossible for inspectors to directly observe their sealing condition or perform airtightness testing. As a result, the airtightness of the wet area wiring harness circuit 2 is difficult to be fully, accurately, and quickly tested.

[0073] Therefore, during airtightness testing, at least a portion of the wet area 200 of the vehicle can be immersed in water, allowing the return wire harness 2 of the wiring harness assembly to be submerged. The dry area 100 of the vehicle remains outside the water. The airtightness testing device 3 can easily connect the dry area 100 to the first airtightness interface 11 of the wiring harness assembly, and inject gas into the return wire harness 2 of the wiring harness assembly through the first airtightness interface 11. The airtightness of the return wire harness 2 is detected by observing whether air bubbles appear in the water. Furthermore, the location of poor airtightness of the return wire harness 2 can be quickly determined based on the position of the air bubbles in the water, thereby achieving a comprehensive, thorough, accurate, and rapid test of the airtightness of the wet area wiring harness circuit 2.

[0074] It should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0076] In the description of this specification, the references to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" refer to specific features, structures, materials or characteristics described in connection with the embodiments or examples that are included in at least one embodiment or example of this application.

[0077] The above are merely embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this application should be included within the protection scope of this application.

Claims

1. A wire harness assembly, characterized in that, The wiring harness assembly includes a first air guide (1) and a return line harness (2); The first end of the first air guide (1) has at least one first airtight interface (11). The return line harness (2) includes at least one first cable (21), and the interior of the first insulating sheath (211) of at least one first cable (21) is connected to the second end of the first air guide (1); The first air guide (1) is adapted to be connected to the airtightness testing device (3) through the at least one first airtight interface (11).

2. The wire harness assembly according to claim 1, characterized in that, The first air guide (1) includes at least one second cable (12); The interior of the second insulating sheath (121) of each of the second cables (12) is connected to one of the first airtight interfaces (11), and the interior of each of the second insulating sheaths (121) is also connected to the interior of at least one of the first insulating sheaths (211).

3. The wire harness assembly according to claim 1, characterized in that, The first air guide (1) includes a first interface (13) and a plurality of first airtight interfaces (11), the plurality of first airtight interfaces (11) being integrated into the first interface (13).

4. The wire harness assembly according to claim 3, characterized in that, The first air guide (1) includes a plurality of first interface components (13), each of which integrates a plurality of first airtight interfaces (11).

5. The wire harness assembly according to claim 3, characterized in that, The wiring harness assembly also includes a first wiring harness sleeve (5), which is wrapped around the first air guide (1).

6. The wire harness assembly according to claim 3, characterized in that, The first interface component (13) has a protective cover (131) which is detachably covered on each of the first airtight interfaces (11).

7. A method for testing the airtightness of a wire harness assembly, characterized in that, The airtightness testing method is used to test the airtightness of the wire harness assembly according to any one of claims 1-6, and includes the following steps: The first airtight interface (11) of the wire harness assembly is sealed inside the sealing structure (31) of the airtightness testing device (3); Inflate the sealing structure (31) with gas or evacuate the sealing structure (31).

8. The airtightness testing method according to claim 7, characterized in that, The airtightness testing method further includes the following steps: After filling the sealing structure (31) with air or evacuating the sealing structure (31), check whether the pressure value inside the sealing structure (31) is abnormal.

9. The airtightness testing method according to claim 7, characterized in that, The airtightness testing method further includes the following steps: After sealing the first airtight interface (11) inside the sealing structure (31) of the airtight test device (3), first immerse the return line harness (2) of the wire harness assembly in water, then inflate the sealing structure (31) with air, and check whether bubbles appear in the water.

10. A vehicle, characterized in that, The vehicle includes the wiring harness assembly as described in any one of claims 1 to 6.

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