Electric vehicle safety insulation detection system and method

Abstract

The present invention relates to the field of automobile detection technology, and in particular to a safety insulation detection system and method for electric vehicles, comprising a whole vehicle conveyor line for conveying a vehicle to be detected, a support frame arranged at least on one side of the whole vehicle conveyor line, at least two guide units fixed to the support frame and arranged parallel to the direction of the whole vehicle conveyor line, a follower mechanism slidably mounted on each of the guide units and used for performing insulation testing on the electric vehicle, an identification unit arranged at the vehicle entry end of the whole vehicle conveyor line and used for vehicle identification, and a control unit connected to the follower mechanism and the identification unit by signal, wherein the follower mechanism is connected to the whole vehicle conveyor line signal and can move synchronously with the vehicle to be detected and return to its original workstation after the detection is completed; the support frame arranged on the side of the whole vehicle conveyor line facilitates the installation of the guide unit and the follower mechanism, realizes the synchronous movement of the follower mechanism and the vehicle to be detected, and performs insulation detection while the vehicle moves, thereby shortening the detection time.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile detection, and in particular to a safety insulation detection system and method for electric vehicles. Background Art

[0002] Electric vehicles are vehicles that use electricity as a power source and are driven by electric motors. They are classified as new energy vehicles and include pure electric vehicles, hybrid electric vehicles, and fuel cell electric vehicles. Their development prospects are widely optimistic due to their lower environmental impact compared to traditional vehicles, but the technology is still immature. After production, electric vehicles must meet national waterproofing requirements. Typically, insulation testing is performed after simulated cleaning and simulated water wading tests to ensure that the vehicle still meets certain insulation resistance requirements after wading. Domestic insulation testing for electric vehicles is still in the exploratory stage.

[0003] A Chinese patent discloses a whole-vehicle electrical inspection and testing device, comprising: a fixing seat and a detection mechanism; the detection mechanism is installed in the fixing seat and is used to detect the vehicle circuit; the fixing seat comprises a base, an anti-electric blanket and a fixing mechanism, and the fixing mechanism is installed on the base; the fixing mechanism comprises a fixed rotating frame and a fixed disk; the fixed rotating frame has multiple parts, and one end is rotatably installed on the side of the base; the other end of the fixed rotating frame is fixedly connected to the fixed disk; the anti-electric blanket is installed on the base; the fixed disk comprises an electromagnetic disk and a rubber suction cup; the rubber suction cup is installed on the surface of the electromagnetic disk; the whole-vehicle insulation testing device performs testing when the vehicle is stationary, and the detection of a single car takes a long time, and the detection efficiency is not ideal. Summary of the Invention

[0004] The purpose of the present invention is to provide an electric vehicle safety insulation detection system and method, which can shorten the single vehicle detection time of the vehicle insulation detection equipment, improve the efficiency of electric vehicle insulation detection, and meet the electric vehicle insulation detection needs of the automobile production line.

[0005] The present invention is implemented as follows: an electric vehicle safety insulation testing system includes: a whole vehicle conveyor line for conveying a vehicle to be tested, a support frame arranged on at least one side of the whole vehicle conveyor line, at least two guide units fixed to the support frame and arranged parallel to the direction of the whole vehicle conveyor line, a follower mechanism slidably mounted on each of the guide units and used for performing insulation testing of the electric vehicle, an identification unit arranged at the vehicle entry end of the whole vehicle conveyor line and used for vehicle identification, and a control unit connected to the follower mechanism and the identification unit signal, the follower mechanism is connected to the whole vehicle conveyor line signal and can move synchronously with the vehicle to be tested and return to its original position after the detection is completed.

[0006] The present invention provides an electric vehicle safety insulation testing system. The vehicle to be tested moves along a whole vehicle conveyor line. A support frame provided on the side of the whole vehicle conveyor line facilitates the installation of a guide unit and an accompanying mechanism, thereby achieving synchronous movement of the accompanying mechanism and the vehicle to be tested, facilitating insulation testing of the electric vehicle while the vehicle moves, thereby shortening the testing time. By providing at least two guide units, while one accompanying mechanism is testing the vehicle to be tested, the other accompanying mechanisms on the support frame can follow the other vehicles to be tested for synchronous testing or return to their original positions after completing the testing. This shortens the testing time of a single vehicle and improves the efficiency of electric vehicle insulation testing. The electric vehicle insulation testing needs of an automobile production line can be met. The identification unit and the control unit facilitate the control of the testing process, thereby ensuring the smooth progress of the electric vehicle insulation testing.

[0007] Preferably, the guide unit includes: a guide rail and a cable track fixed vertically to the support frame and arranged close to one side of the vehicle conveyor line, and the guide rail and the cable track are separated by a distance in the vertical direction, a cable is slidably installed at the bottom of the cable track, and the control unit is connected to the accompanying mechanism signal through the cable.

[0008] Preferably, the accompanying mechanism includes: a sliding part slidably connected to one side of the guide rail, a driving unit installed on the top of the guide rail and fixedly connected to the sliding part, a panel fixed to the side of the sliding part, and a fast charging detection plug, a slow charging detection plug and a grounding plug plugged into one side of the panel.

[0009] Preferably, the driving unit includes: a rack fixed to the outside of the top of the guide rail, a mounting frame slidably mounted on the top of the guide rail and fixedly connected to the sliding member, a driving motor fixed to the top of the mounting frame, and a gear connected to the output end of the driving motor and meshing with the rack.

[0010] Preferably, the control unit includes: a cabinet arranged on one side of the whole vehicle conveyor line, an industrial computer arranged inside the cabinet, and an electric vehicle safety tester and a built-in diagnostic instrument connected to the industrial computer signal. There are multiple electric vehicle safety testers, and each of the electric vehicle safety testers is connected to two accompanying mechanisms at the same height on the support frames on both sides of the whole vehicle conveyor line through cables. The built-in diagnostic instrument is connected to an external diagnostic instrument through Bluetooth communication. The whole vehicle conveyor line and the accompanying mechanism are connected through PLC signals, and the two maintain synchronous operation or synchronous stop.

[0011] Preferably, the support frames are symmetrically fixed on the ground on both sides of the vehicle conveyor line, and each of the support frames is fixedly mounted with two guide units.

[0012] The present invention also provides a method for detecting safety insulation of an electric vehicle, comprising the following steps:

[0013] Step S1: After being exposed to simulated rain, the vehicle under test is driven into the vehicle conveyor line and the engine is turned off. The vehicle follows the vehicle conveyor line and the vehicle body number of the current vehicle under test is identified by the identification unit;

[0014] Step S2: Determine the installation positions of the slow charging port and the fast charging port of the vehicle to be tested;

[0015] Step S3: Based on the result of step S2, one or two accompanying structures beside the vehicle conveyor line move synchronously with the vehicle to be tested, and the other accompanying structures test other vehicles or return to their original positions after completing the test;

[0016] Step S4: Connecting the accompanying mechanism in synchronous motion to the vehicle under test to perform fast charging test and slow charging test;

[0017] Step S5: After the test is completed, the accompanying mechanism is disconnected from the vehicle under test, and the accompanying mechanism moves along the guide unit and resets.

[0018] Preferably, step S3 specifically includes:

[0019] When it is determined that the slow charging port and the fast charging port of the vehicle to be tested are located on the same side of the vehicle body, one of the accompanying structures on the support frame on one side of the vehicle conveyor line slides along the guide unit where it is located and moves synchronously with the vehicle to be tested or stops synchronously;

[0020] When it is determined that the slow charging port and the fast charging port of the vehicle to be tested are located on both sides of the vehicle body, two accompanying structures at the same height on the support frames on both sides of the vehicle conveyor line slide along the guide units and move or stop synchronously with the vehicle to be tested.

[0021] Preferably, step S4 specifically includes:

[0022] Step S401: Open the vehicle door and connect the grounding plug to the vehicle to be tested to prepare for grounding resistance testing;

[0023] Step S402: using an external diagnostic instrument to send a command to the vehicle to be tested to turn off the vehicle insulation detection function;

[0024] Step S403: When it is determined that the slow charging port and the fast charging port of the vehicle to be tested are located on the same side of the vehicle body, the fast charging detection plug and the slow charging detection plug of one of the accompanying mechanisms are respectively inserted into the fast charging port and the slow charging port of the vehicle to be tested;

[0025] Alternatively, when it is determined that the slow charging port and fast charging port of the vehicle to be tested are located on both sides of the vehicle body, the fast charging detection plug on the accompanying mechanism on one side and the slow charging detection plug on the accompanying mechanism at the same height on the other side are respectively inserted into the fast charging port and slow charging port of the vehicle to be tested;

[0026] Step S404: Use the remote control device to start the test and confirm the test result according to the display screen.

[0027] Preferably, step S5 specifically includes:

[0028] Step S501: Disconnect the fast charge detection plug, slow charge detection plug, and ground plug connected to the vehicle to be tested and put them back in place;

[0029] Step S502: The vehicle door is closed, and the accompanying mechanism that has completed the detection moves along the guide unit where it is located and resets;

[0030] Step S503: Start the vehicle and move the inspected vehicle to the next workstation.

[0031] The present invention provides a safety insulation testing method for electric vehicles: first, an identification unit is used to identify the information of the current tested vehicle to ensure that the test result corresponds to the vehicle body number; before the test, the installation position of the slow charging port and the fast charging port of the vehicle is confirmed to facilitate the test using accompanying mechanisms at different positions; two of the accompanying mechanisms beside the whole vehicle conveyor line perform insulation tests on the fast charging port and the slow charging port of the vehicle while moving synchronously with the vehicle, so that the vehicle can be tested for insulation while passing through the whole vehicle conveyor line, thereby shortening the testing time of a single vehicle; the test results are displayed on a display screen in real time, making it convenient for staff to obtain the test results in real time; after the test is completed, the accompanying mechanism moves and resets along the guide unit where it is located, and the accompanying mechanisms on other guide units prepare for the test of the next vehicle or perform the test of the next vehicle, thereby improving the insulation testing efficiency of the electric vehicle.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The support frame provided on the side of the vehicle conveyor line is used to facilitate the installation of the guide unit and accompanying mechanism, thus achieving synchronous movement of the accompanying mechanism and the vehicle under test, making it convenient to conduct insulation testing of electric vehicles while the vehicle is moving, thus shortening the testing time of a single vehicle;

[0034] 2. By setting up at least two guide units, while one of the accompanying mechanisms is testing the vehicle under test, the other accompanying mechanisms on the support frame can follow the other vehicles under test for synchronous testing or return to their original positions after completing the test; this further shortens the testing time for a single vehicle and improves the efficiency of electric vehicle insulation testing;

[0035] 3. By using multiple accompanying mechanisms installed beside the conveyor line, different accompanying mechanisms can be selected for testing according to the installation positions of the fast charging port and the slow charging port, meeting the safety insulation accompanying detection of various types of electric vehicles and meeting the high-beat detection requirements of electric vehicle insulation testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a front structural diagram of an electric vehicle safety insulation detection system provided by the present invention;

[0037] Figure 2 A top view of an electric vehicle safety insulation detection system provided by the present invention;

[0038] Figure 3 A schematic diagram of the connection between multiple safety instruments and accompanying mechanisms on both sides of an electric vehicle safety insulation detection system provided by the present invention;

[0039] Figure 4 A schematic diagram showing the connection between one of the safety instruments and accompanying mechanisms on both sides of the electric vehicle safety insulation detection system provided by the present invention;

[0040] Figure 5 for Figure 1 A partial enlarged view of the middle part;

[0041] Figure 6 A side structural view of a support frame of an electric vehicle safety insulation detection system provided by the present invention;

[0042] Figure 7 for Figure 6 A partial enlarged view of point B in the middle;

[0043] Figure 8 for Figure 6 A partial enlarged view of point C in the middle;

[0044] Figure 9 The present invention provides a structural diagram of an electric vehicle safety insulation detection system when it is suspended for installation.

[0045] In the accompanying drawings: 1 vehicle conveyor line, 2 support frame, 3 guide unit, 31 guide rail, 32 cable track, 4 accompanying mechanism, 41 sliding part, 42 drive unit, 421 rack, 422 mounting frame, 423 drive motor, 424 gear, 43 panel, 44 fast charging detection plug, 45 slow charging detection plug, 5 control unit, 6 display screen, 7 cable. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not intended to limit the scope of the present application.

[0047] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more.

[0048] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to changes in the orientation of the components in the drawings.

[0049] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0050] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0051] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0052] Example 1

[0053] like Figures 1-8As shown, it is a structural diagram of an electric vehicle safety insulation testing system provided by the present invention, comprising: a whole vehicle conveyor line 1 for conveying a vehicle to be tested, a support frame 2 arranged at least on one side of the whole vehicle conveyor line 1, at least two guide units 3 fixed to the support frame 2 and arranged parallel to the direction of the whole vehicle conveyor line 1, a follower mechanism 4 slidably mounted on each of the guide units 3 and used for performing insulation testing of the electric vehicle, an identification unit arranged at the vehicle entry end of the whole vehicle conveyor line 1 and used for vehicle identification, and a control unit 5 connected to the follower mechanism 4 and the identification unit by signal, the follower mechanism 4 being connected to the whole vehicle conveyor line 1 by signal and being able to move synchronously with the vehicle to be tested and return to its original position after the test is completed.

[0054] In actual application of this embodiment, the vehicle to be tested moves along the whole vehicle conveyor line 1, and the support frame 2 provided on the side of the whole vehicle conveyor line 1 is used to facilitate the installation of the guide unit 3 and the accompanying mechanism 4, thereby realizing the synchronous movement of the accompanying mechanism 4 and the vehicle to be tested, and facilitating the insulation test of the electric vehicle while the vehicle is moving, thereby shortening the test time; by providing at least two guide units 3, while one of the accompanying mechanisms 4 is testing the vehicle to be tested, the other accompanying mechanisms 4 on the support frame 2 can follow the other vehicles to be tested for synchronous testing or return to the original workstation after completing the test, thereby further shortening the test time of a single vehicle, improving the insulation test efficiency of the electric vehicle, and meeting the insulation test requirements of the automobile production line; the identification unit and the control unit 5 are used to facilitate the control of the test process, thereby ensuring the smooth progress of the insulation test of the electric vehicle.

[0055] First, the identification unit is used to identify the information of the current vehicle under test to ensure that the test results correspond to the vehicle body number; the accompanying mechanism 4 moves synchronously with the vehicle under test along the guide unit 3, so that the vehicle can undergo electric vehicle insulation testing while passing through the vehicle conveyor line 1, shortening the testing time of a single vehicle; the accompanying mechanisms 4 on both sides are convenient for performing insulation tests on the fast charging port and slow charging port of the vehicle while moving synchronously with the vehicle, and the test results are displayed in real time on the display screen 6, making it convenient for staff to obtain the test results in real time; after the test is completed, the accompanying mechanism 4 moves and resets along the guide unit 3 where it is located, and the accompanying mechanisms 4 on other guide units 3 have already prepared for the test of the next vehicle or performed the test of the next vehicle before this, which is conducive to improving the efficiency of electric vehicle insulation testing.

[0056] Specifically, the guide unit 3 includes: a guide rail 31 and a cable rail 32 vertically fixed to the support frame 2 and arranged close to the side of the vehicle conveyor line 1, and the guide rail 31 and the cable rail 32 are separated by a distance in the vertical direction, and a cable 7 is slidably installed at the bottom of the cable rail 32, and the control unit 5 is connected to the accompanying mechanism 4 by signal through the cable 7.

[0057] It can be seen that by setting the guide rail 31, it is convenient to install the accompanying mechanism 4, so as to ensure that the accompanying mechanism 4 always moves in a direction parallel to the vehicle conveyor line 1; by using the cable track 32 separated from the guide rail 31 by a certain distance, it is convenient to bundle the cable 7 during the movement of the accompanying mechanism 4, so as to ensure that the accompanying mechanism 4 can always be connected to the control unit 5 signal, which is convenient for various types of electric vehicle insulation detection.

[0058] During actual operation, the accompanying mechanism 4 is slidably installed on the side of the guide rail 31 close to the vehicle conveyor line 1. The length of the cable 7 exceeds the length of the cable track 32. The cable 7 is bundled by using a buckle slidably installed at the bottom of the cable track 32 to avoid the cable 7 from being entangled or messy during the movement of the accompanying mechanism 4, thereby ensuring stable signal transmission.

[0059] Furthermore, the accompanying mechanism 4 includes: a sliding member 41 slidably connected to one side of the guide rail 31, a driving unit 42 installed on the top of the guide rail 31 and fixedly connected to the sliding member 41, a panel 43 fixed to the side of the sliding member 41, and a fast charging detection plug 44, a slow charging detection plug 45 and a grounding plug plugged into one side of the panel 43.

[0060] It can be seen that by setting the sliding member 41, it is convenient to move along the guide rail 31, so that it can move in a direction parallel to the vehicle conveyor line 1 under the action of the driving unit 42; the panel 43 is used to facilitate the plugging of various types of test plugs, so that it is convenient to carry out the electric vehicle insulation test of the car while moving.

[0061] In one case of this embodiment, Figure 8 As shown, the driving unit 42 includes: a rack 421 fixed on the outer side of the top of the guide rail 31, a mounting frame 422 slidably mounted on the top of the guide rail 31 and fixedly connected to the sliding member 41, a driving motor 423 fixed on the top of the mounting frame 422, and a gear 424 connected to the output end of the driving motor 423 and engaged with the rack 421. The driving motor 423 drives the gear 424 to rotate, thereby driving the mounting frame 422 to move along the top of the guide rail 31 through the rack 424, driving the sliding member 41 on the side to move along the guide rail 31, and then driving the accompanying mechanism 4 to move.

[0062] In another case of this embodiment, Figure 9As shown, in addition to using the guide rails 31 and columns of the present device, the guide unit 3 and the support frame 2 can also be installed in a suspended manner, which is suitable for situations where the ground space is narrow and the steel structure of the factory building meets a certain load-bearing stability. The support frame 2 and the guide unit 3 in this embodiment are not restrictive regulations. The accompanying mechanisms 4 on both sides of the vehicle conveyor line 1 can be set as different test components as needed to meet different test requirements.

[0063] Furthermore, the control unit 5 includes: a cabinet arranged on one side of the whole vehicle conveyor line 1, an industrial computer arranged inside the cabinet, and an electric vehicle safety tester and a built-in diagnostic instrument connected to the industrial computer signal. There are multiple electric vehicle safety testers, and each of the automobile safety testers is connected to two accompanying mechanisms 4 at the same height on the support frame 2 on both sides of the whole vehicle conveyor line 1 through a cable 7. The built-in diagnostic instrument is connected to an external diagnostic instrument via Bluetooth communication. The control unit also includes an electrical control system, specifically a power switch, relay, contactor, inverter, etc.

[0064] like Figure 3 and Figure 4 As shown, it is a schematic diagram of the connection between the electric vehicle safety tester and the accompanying mechanism 4, wherein two accompanying mechanisms 4 at the same height on the supporting frames 2 on both sides are correspondingly connected to one electric vehicle safety tester, and one electric vehicle safety tester is simultaneously connected to the fast charging detection plug 44, slow charging detection plug 45 and grounding plug on the accompanying mechanisms 4 on both sides, so that the two accompanying mechanisms 4 at the same height can be used to test the same vehicle; the electric vehicle safety tester and the vehicle diagnostic instrument are controlled by the industrial computer to meet the testing needs in different situations.

[0065] In actual operation, the accompanying mechanisms 4 on the support frames 2 on both sides can be set to multiple, so as to meet the simultaneous detection of multiple vehicles. As long as the two accompanying mechanisms 4 at the same height on the support frames 2 on both sides are connected to the same electric vehicle safety tester, this embodiment does not make specific limitations here.

[0066] Specifically, the fast charging detection plug 44 can be a fast charging gun, the slow charging detection plug 45 can be a slow charging gun, and the built-in diagnostic instrument can adopt an OBD vehicle diagnostic instrument, which is wirelessly connected to an external diagnostic instrument via Bluetooth, and sends instructions to the vehicle to be tested through the external tester to turn off the vehicle insulation detection function, and control the internal relay through the diagnostic instruction to expand the detection range to all high-voltage parts of the vehicle, so as to facilitate subsequent vehicle insulation testing.

[0067] Exemplarily, the support frame 2 can be a plurality of columns arranged at intervals on one side of the vehicle conveyor line 1, and the guide rails 31 and the cable rails 32 are arranged perpendicular to the columns, so as to ensure the normal testing of the accompanying mechanism 4; the sliding member 41 can be a movable plate, and a slider slidably connected to the guide rail 31 is fixedly installed on the outside; in addition to adopting the gear rack structure of this device, the driving unit 42 can also adopt a ball screw to drive the sliding member 41 to move. The implementation method of this embodiment is not a restrictive provision.

[0068] It can be seen that this device shortens the inspection time of a single car by setting at least two guide units 3 and accompanying mechanisms 4, and can simultaneously realize the simultaneous inspection of two or more vehicles in the front and rear, meeting the large-scale inspection needs of the automobile production line.

[0069] Example 2

[0070] like Figure 2 As shown, based on Example 1, the support frame 2 is symmetrically fixed on the ground on both sides of the vehicle conveyor line 1, and each support frame 2 is fixedly installed with two guide units 3.

[0071] In actual application, this embodiment is symmetrically fixed on the ground on both sides of the vehicle conveying line 1 by fixing the support frame 2 symmetrically. Thus, during the whole vehicle conveying process, one vehicle can be tested simultaneously by using the accompanying mechanisms 4 on both sides, which is beneficial to further shorten the inspection time of a single vehicle. The use of two guide units 3 avoids the waste of working hours caused by the resetting of the accompanying mechanism 4 during peak hours, which is beneficial to improving the efficiency of the electric vehicle insulation inspection.

[0072] Specifically, the identification unit is configured as an RFID sensing system or a code scanning identification system connected to the control unit 5 signal. The identification unit is used to facilitate the identification of the vehicle body number when the vehicle enters the vehicle conveyor line 1, thereby ensuring the accuracy of the insulation detection of electric vehicles and avoiding errors caused by manual statistics. In addition to using the RFID sensing system, the use of a manual handheld code scanning gun can also ensure the accuracy of statistics, further saving detection time.

[0073] Furthermore, the vehicle conveyor line 1 and the accompanying mechanism 4 are connected by PLC signals, and the two maintain synchronous operation or synchronous stop.

[0074] It should be noted that using PLC to control the movement of the vehicle conveyor line 1 and the accompanying mechanism 4 can ensure that the accompanying mechanism 4 and the vehicle conveyor line 1 run or stop synchronously, avoiding the risk of the detection equipment and the vehicle being out of sync.

[0075] In one case of this embodiment, the accompanying mechanism 4 can only operate under the premise that the vehicle conveyor line 1 operates normally; specifically, the PLC output signal of the conveyor line serves as the PLC input signal of the accompanying mechanism 4. When the vehicle conveyor line 1 stops, the accompanying mechanism 4 stops. The stop signal of the vehicle conveyor line 1 is divided into a general stop, including pause, emergency stop, fault stop, etc.

[0076] In another case of this embodiment, the PLC output signal of the accompanying mechanism 4 is used as the PLC input signal of the whole vehicle conveyor line 1; it can ensure that when the accompanying mechanism 4 stops abnormally, the whole vehicle conveyor line 1 stops immediately; it ensures that the two can run or stop synchronously, avoiding harm to the operator and improving the reliability of the device.

[0077] In actual operation, this embodiment, on the basis of adopting the safety interlocking of the accompanying mechanism 4 and the whole vehicle conveyor line 1, can also combine the photoelectric protection, sound and light alarm, and guardrail measures of the accompanying mechanism 4 to achieve safe operation of the equipment and ensure the safety of the inspection personnel.

[0078] Example 3

[0079] like Figures 1-4 As shown, this embodiment is an embodiment of a safety insulation detection method for an electric vehicle, comprising the following steps:

[0080] Step S1: After being exposed to simulated rain, the vehicle under test is driven into the vehicle conveyor line 1 and the engine is turned off. The vehicle follows the vehicle conveyor line 1 and the vehicle body number of the current vehicle under test is identified by the identification unit;

[0081] Step S2: Determine the installation positions of the slow charging port and the fast charging port of the vehicle to be tested;

[0082] Step S3: Based on the determination result of step S2, one or two accompanying structures 4 beside the vehicle conveyor line 1 move synchronously with the vehicle to be tested, and the other accompanying structures 4 test other vehicles or return to their original positions after completing the test;

[0083] Step S4: Connecting the accompanying mechanism 4 in synchronous motion to the vehicle under test to perform fast charging test and slow charging test;

[0084] Step S5: After the test is completed, the accompanying mechanism 4 is disconnected from the vehicle under test, and the accompanying mechanism 4 moves along the guide unit 3 and resets.

[0085] Specifically, the identification unit is first used to identify the information of the current vehicle under test to ensure that the test results correspond to the vehicle body number; the installation position of the slow charging port and the fast charging port of the vehicle is confirmed before testing, so that the accompanying mechanisms 4 at different positions can be used for testing; two of the accompanying mechanisms 4 on the side of the whole vehicle conveyor line 1 are used to perform insulation tests on the fast charging port and the slow charging port of the vehicle while moving synchronously with the vehicle, so that the vehicle can be tested for insulation while passing through the whole vehicle conveyor line 1, shortening the testing time of a single vehicle; the test results are displayed on the display screen in real time, making it convenient for the staff to obtain the test results in real time; after the test is completed, the accompanying mechanism 4 is disconnected from the vehicle under test, and the accompanying mechanism 4 is moved and reset along the guide unit 3 where it is located. The accompanying mechanisms 4 on other guide units 3 have already prepared for the detection of the next vehicle or performed the detection of the next vehicle, thereby improving the insulation detection efficiency of electric vehicles.

[0086] In one case of this embodiment, step S3 specifically includes:

[0087] When it is determined that the slow charging port and the fast charging port of the vehicle to be tested are located on the same side of the vehicle body, one of the accompanying structures 4 on the support frame 2 on one side of the vehicle conveyor line 1 slides along the guide unit 3 where it is located and moves synchronously with the vehicle to be tested or stops synchronously;

[0088] When it is determined that the slow charging port and the fast charging port of the vehicle to be tested are located on both sides of the vehicle body, two accompanying structures 4 at the same height on the support frame 2 on both sides of the vehicle conveyor line 1 slide along the guide unit 3 and move synchronously or stay still with the vehicle to be tested.

[0089] Specifically, the installation positions of the fast charging port and the slow charging port are confirmed manually or by machine, so that the fast charging port and the slow charging port can be tested using one of the accompanying mechanisms 4 on the same side of the vehicle conveyor line 1, or two of the accompanying mechanisms 4 on both sides of the vehicle conveyor line 1 can be used to test at the same time, so that there can be multiple combinations to meet different testing needs.

[0090] Furthermore, step S4 specifically includes:

[0091] Step S401: Open the vehicle door and connect the grounding plug to the vehicle to be tested to prepare for grounding resistance testing;

[0092] Step S402: using an external diagnostic instrument to send a command to the vehicle to be tested to turn off the vehicle insulation detection function;

[0093] Step S403: When it is determined that the slow charging port and the fast charging port of the vehicle to be tested are located on the same side of the vehicle body, the fast charging detection plug 44 and the slow charging detection plug 45 of one of the accompanying mechanisms 4 are respectively inserted into the fast charging port and the slow charging port of the vehicle to be tested;

[0094] Alternatively, when it is determined that the slow charging port and the fast charging port of the vehicle to be tested are located on both sides of the vehicle body, the fast charging detection plug 44 on the accompanying mechanism 4 on one side and the slow charging detection plug 45 on the accompanying mechanism 4 at the same height on the other side are respectively inserted into the fast charging port and the slow charging port of the vehicle to be tested;

[0095] Step S404: Use the remote control device to start the test and confirm the test result according to the display screen 6.

[0096] In actual operation, this embodiment can be equipped with accompanying mechanisms 4 on both sides of the vehicle conveyor line 1 to meet the detection tasks of various vehicle models. Taking the vehicle's forward direction as the front, the left and right sides are divided into the following exemplary scenarios:

[0097] Scenario 1: The fast-charging and slow-charging ports of a vehicle are located on the left and right sides of the vehicle. The accompanying mechanisms 4 on both sides can be used to detect the ports. If the fast-charging port is on the left and the slow-charging port is on the right, the left accompanying mechanism 4 uses a fast-charging plug to connect to the vehicle's fast-charging port, and the right accompanying mechanism 4 uses a slow-charging plug to connect to the vehicle's slow-charging port. Conversely, if the slow-charging port is on the left and the fast-charging port is on the right, the left accompanying mechanism 4 uses a slow-charging plug to connect to the vehicle's slow-charging port, and the right accompanying mechanism 4 uses a fast-charging plug to connect to the vehicle's fast-charging port.

[0098] Scenario 2: The fast charging port and slow charging port of the vehicle are arranged on the same side of the vehicle, and the fast charging plug and slow charging plug on the accompanying mechanism 4 on the same side can be used for corresponding detection.

[0099] Scenario 3: If the vehicle's fast-charging port is located elsewhere, such as near the vehicle logo, both the left and right accompanying mechanisms 4 can meet the inspection requirements. Based on actual operating conditions and utilizing industrial engineering inspection procedures, the most suitable of the two sides can be selected as the accompanying mechanism 4.

[0100] Specifically, the ground wire can be connected from the left or right accompanying mechanism 4 according to the actual process.

[0101] In actual operation of this embodiment, after opening the main driver's door and the passenger driver's door, the vehicle to be tested is first grounded to prepare for ground resistance testing. Then, an external diagnostic instrument is used to send a command to the vehicle to be tested to turn off the vehicle insulation detection function. Subsequently, one staff member inserts the slow charge detection plug 45 into the designated interface; another staff member inserts the fast charge detection plug 44 into the designated interface. The two operators correspond to different operating positions and operate in parallel to achieve the shortest working hours for coordinated operation. Next, the start detection button is activated, and the test is automatically performed in the order of fast charge positive electrode insulation resistance, fast charge negative electrode insulation resistance, fast charge ground resistance, slow charge L phase insulation resistance, slow charge N phase insulation resistance, and slow charge ground resistance. The inspector can determine whether to end or retest by viewing the test results on the visual display.

[0102] Furthermore, step S5 specifically includes:

[0103] Step S501: disconnect the fast charge detection plug 44, slow charge detection plug 43 and ground plug connected to the vehicle to be tested and put them back in place;

[0104] Step S502: The vehicle door is closed, and the accompanying mechanism 4 that has completed the detection moves along the guide unit 3 where it is located and resets;

[0105] Step S503: Start the vehicle and move the inspected vehicle to the next workstation.

[0106] It can be seen that after completing the inspection, one operator first unplugs the fast charging detection plug 44 and plugs it back into the panel 43; at the same time, another operator unplugs the grounding plug and puts it back in place, and plugs the slow charging detection plug 45 back into the panel 43; this ensures that the tests at the two positions are carried out simultaneously, thereby improving the efficiency of electric vehicle insulation detection.

[0107] It should be noted that this testing method utilizes a double-layer guide rail 31 arrangement, allowing for higher-frequency testing. This ensures that when one accompanying mechanism 4 completes testing and returns to its original position, the other accompanying mechanism 4 can simultaneously test with other vehicles under test or return to its original position after completing testing. This allows for simultaneous testing of both vehicles, further improving the efficiency of electric vehicle insulation testing. The coordinated structural composition, mechanical design, and electrical design of this solution enable a flexible production model for electric vehicle safety insulation testing, meeting the insulation testing requirements of various electric vehicles. This system can achieve high-frequency testing regardless of the charging port layout.

[0108] The above embodiment of the present invention provides an electric vehicle safety insulation detection system and method, which utilizes a support frame provided on the side of the whole vehicle conveyor line 1 to facilitate the installation of a guide unit and a accompanying mechanism 4, thereby realizing the synchronous movement of the accompanying mechanism 4 and the vehicle under test, and facilitating the insulation detection of the electric vehicle while the vehicle moves, thereby shortening the detection time of a single vehicle; by providing at least two guide units, while one of the accompanying mechanisms 4 is testing the vehicle under test, the other accompanying mechanisms 4 on the support frame 2 can follow the other vehicles under test for synchronous testing or return to the original workstation after completing the test; thereby further shortening the detection time of a single vehicle and improving the insulation detection efficiency of the electric vehicle; utilizing the accompanying mechanisms 4 provided on both sides of the conveyor line, it is convenient to select the accompanying mechanisms 4 at different positions for insulation testing according to the installation positions of the fast charging port and the slow charging port, and combining the identification unit and the control unit to realize rapid detection of a single vehicle, thereby further shortening the working hours of single vehicle detection, and meeting the electric vehicle insulation detection needs of the automobile production line.

[0109] The serial numbers of the embodiments of this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this application and do not limit the scope of the patent of this application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. An electric vehicle safety insulation detection system, characterized in that: include: A vehicle conveyor line (1) for conveying a vehicle to be tested, a support frame (2) arranged at least on one side of the vehicle conveyor line (1), at least two guide units (3) fixed to the support frame (2) and arranged parallel to the direction of the vehicle conveyor line (1), a follower mechanism (4) slidably mounted on each guide unit (3) and used for performing an insulation test on an electric vehicle, an identification unit arranged at the vehicle entry end of the vehicle conveyor line (1) and used for vehicle identification, and a control unit (5) connected to the follower mechanism (4) and the identification unit by signal, the follower mechanism (4) being connected to the vehicle conveyor line (1) by signal and being able to move synchronously with the vehicle to be tested and return to the original position after the test is completed; the guide unit (3) comprises: a guide unit fixed vertically to the support frame (2) and close to the vehicle conveyor line (1); a guide unit (4) for performing an insulation test on an electric vehicle; a guide unit (5 ... A guide rail (31) and a cable track (32) are arranged on one side of the line (1), and the guide rail (31) and the cable track (32) are separated by a distance in the vertical direction. A cable (7) is slidably installed at the bottom of the cable track (32), and the control unit (5) is connected to the accompanying mechanism (4) by signal through the cable (7); a buckle for tightening the cable is slidably installed at the bottom of the cable track; the control unit (5) includes a plurality of electric vehicle safety testers, and each of the electric vehicle safety testers is correspondingly connected to two accompanying mechanisms (4) at the same height on the support frame (2) on both sides of the whole vehicle conveyor line (1) through the cable (7); the whole vehicle conveyor line (1) and the accompanying mechanism (4) are connected by PLC signals, and the two maintain synchronous operation or synchronous stop.

2. The electric vehicle safety insulation detection system according to claim 1, characterized in that: The accompanying mechanism (4) comprises: a sliding member (41) slidably connected to one side of the guide rail (31), a driving unit (42) mounted on the top of the guide rail (31) and fixedly connected to the sliding member (41), a panel (43) fixedly arranged on the side of the sliding member (41), and a fast charge detection plug (44), a slow charge detection plug (45) and a grounding plug plugged into one side of the panel (43).

3. The electric vehicle safety insulation detection system according to claim 2, characterized in that: The driving unit (42) comprises: a rack (421) fixedly mounted on the outer side of the top of the guide rail (31), a mounting frame (422) slidably mounted on the top of the guide rail (31) and fixedly connected to the sliding member (41), a driving motor (423) fixedly mounted on the top of the mounting frame (422), and a gear (424) connected to the output end of the driving motor (423) and meshed with the rack (421).

4. The electric vehicle safety insulation detection system according to claim 3, characterized in that: The control unit (5) further comprises: a cabinet arranged on one side of the vehicle conveyor line (1), an industrial computer arranged inside the cabinet, and a built-in diagnostic instrument connected to the industrial computer signal, and the automobile safety tester is connected to the industrial computer signal.

5. An electric vehicle safety insulation detection system according to any one of claims 1 to 4, characterized in that: The support frames (2) are symmetrically fixed on the ground on both sides of the vehicle conveyor line (1), and each support frame (2) is fixedly mounted with two guide units (3).

6. A detection method applied to an electric vehicle safety insulation detection system according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step S1: After being exposed to simulated rain, the vehicle under test is driven into the vehicle conveyor line (1) and the engine is turned off. The vehicle follows the vehicle conveyor line (1) and the vehicle body number of the vehicle under test is identified by the identification unit; Step S2: Determine the installation positions of the slow charging port and the fast charging port of the vehicle to be tested; Step S3: Based on the determination result of step S2, one or two accompanying structures (4) beside the vehicle conveyor line (1) move synchronously with the vehicle to be tested, and the other accompanying structures (4) perform tests on other vehicles or return to their original positions after completing the tests; Step S4: connecting the accompanying mechanism (4) in synchronous motion to the vehicle under test to perform a fast charging test and a slow charging test; Step S5: After the test is completed, the accompanying mechanism (4) is disconnected from the vehicle under test, and the accompanying mechanism (4) moves along the guide unit (3) and resets; Step S4 specifically includes: Step S401: Open the vehicle door and connect the grounding plug to the vehicle to be tested to prepare for grounding resistance testing; Step S402: using an external diagnostic instrument to send a command to the vehicle to be tested to turn off the vehicle insulation detection function; Step S403: When it is determined that the slow charging port and the fast charging port of the vehicle to be tested are located on the same side of the vehicle body, the fast charging detection plug (44) and the slow charging detection plug (45) of one of the accompanying mechanisms (4) are respectively inserted into the fast charging port and the slow charging port of the vehicle to be tested; Alternatively, when it is determined that the slow charging port and the fast charging port of the vehicle to be tested are located on both sides of the vehicle body, the fast charging detection plug (44) on the accompanying mechanism (4) on one side and the slow charging detection plug (45) on the accompanying mechanism (4) at the same height on the other side are respectively inserted into the fast charging port and the slow charging port of the vehicle to be tested; Step S404: Use the remote control device to start the test and confirm the test result according to the display screen (6).

7. The detection method according to claim 6, characterized in that Step S3 specifically includes: When it is determined that the slow charging port and the fast charging port of the vehicle to be tested are located on the same side of the vehicle body, one of the accompanying structures (4) on the support frame (2) on one side of the vehicle conveyor line (1) slides along the guide unit (3) where it is located, and moves synchronously with the vehicle to be tested or stops synchronously; When it is determined that the slow charging port and the fast charging port of the vehicle to be tested are located on both sides of the vehicle body, two accompanying structures (4) at the same height located on the support frames (2) on both sides of the vehicle conveyor line (1) slide along the guide unit (3) and move synchronously with the vehicle to be tested or remain stationary synchronously.

8. The detection method according to claim 7, characterized in that Step S5 specifically includes: Step S501: disconnect the fast charge detection plug (44), slow charge detection plug (45) and ground plug connected to the vehicle to be tested and put them back in place; Step S502: the vehicle door is closed, and the accompanying mechanism (4) that has completed the detection moves along the guide unit (3) where it is located and resets; Step S503: Start the vehicle and move the inspected vehicle to the next workstation.

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