Method for synchronously detecting insulating and pressure-resistant coating of aluminum alloy battery tray

Abstract

According to the aluminum alloy battery tray insulation pressure-resistant coating synchronous detection method, a plurality of detection pressing plates on a detection head of detection equipment cover and press the bottom faces and the side faces of all grooves of an inner cavity of a battery tray at the same time, and synchronous detection is conducted on a plurality of planes so as to obtain coating detection data, corresponding to all the grooves of the inner cavity of the battery tray, of one detection head; the multiple detection pressing plates on the detection head are electrically connected through wires. According to the invention, voltage insulation and compression resistance tests can be simultaneously carried out on the bottom surface and the side surface of the inner cavity of the battery tray, and the efficiency of insulation and compression resistance coating detection of the battery tray is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of new energy vehicle manufacturing, and in particular to a synchronous detection method for an insulating pressure-resistant coating of an aluminum alloy battery tray. Background Art

[0002] The battery tray is an important component in new energy vehicles. It bears all the weight of the core component of the vehicle - the power battery, and provides necessary protection for the power battery. At the same time, in order to better ensure that the power battery and the vehicle body maintain good electrical insulation and prevent leakage, the inner cavity of the battery tray also needs to be sprayed with a layer of insulating and pressure-resistant coating for protection. The insulating and pressure-resistant coating can not only block high voltage electricity and prevent arc breakdown of the coating, but also has high temperature resistance, waterproof and fireproof, pressure resistance, impact resistance, corrosion resistance and other effects; the coating fully covers the inner cavity of the battery tray with zero dead angle, which is an indispensable processing procedure in the manufacture of power battery trays.

[0003] After the insulating pressure-resistant coating is applied, in order to verify its insulation, it is usually necessary to conduct high-voltage limit insulation and pressure resistance tests on the insulating pressure-resistant coating. The test method is to use an insulating pressure-resistant tester. The power cable of the tester is connected to the power conductive plate. The size and area of ​​the power conductive plate match the test surface of the battery tray. The power conductive plate is in contact with the test surface of the power battery tray. The insulation performance and electrical performance of the test surface can be displayed on the tester display screen, thereby realizing the insulation detection of the power battery tray. However, unlike ordinary electrical components, the insulating pressure-resistant coating on the battery tray is not only present on one surface. The top, bottom and side surfaces of the battery tray are all test surfaces. Moreover, after the battery compartment body is separated by a beam, a battery tray also forms multiple bottom and side test surfaces, resulting in a huge workload for the battery tray detection and cumbersome operation. In previous operations, it was necessary to manually hold a pressure plate and press each inner side of the tray one by one for about 1 minute to obtain the detection data, which resulted in a long operation time and was time-consuming and labor-intensive. Therefore, how to quickly detect the insulating pressure-resistant coating of the battery tray is a technical problem that technicians in this field need to consider.

[0004] The existing literature on the battery tray insulation test equipment is as follows: 1. Photovoltaic module wet leakage current test system; 201721101267.5; A photovoltaic module wet leakage current test system, including a liquid pool and a withstand voltage insulation tester, as well as a first placement rack, a lifting cylinder, a second placement rack, an air drying device and an electrical protection device; the first placement rack is arranged above the liquid pool and is mechanically connected to the lifting cylinder, and the lifting cylinder is used to drive the first placement rack to descend into the liquid pool or rise to the top of the liquid pool; the air drying device is installed on the second placement rack, and is used to blow air to the front and back of the photovoltaic module placed flat on the second placement rack; the electrical protection device is connected to the electrical signal of the withstand voltage insulation tester, and is used to prohibit the withstand voltage insulation tester from outputting voltage and / or cut off the power supply of the withstand voltage insulation tester. The utility model can not only reduce the manpower burden and save labor costs, but also improve the testing and production efficiency, and can further eliminate safety hazards and ensure the reliability and safety of the testing process.

[0005] 2. Battery withstand voltage insulation test mechanism; 201820064704.9; A battery withstand voltage insulation test mechanism, comprising a frame, a clamping mechanism, a conductive part, a servo motor, a lead screw nut pair, a lifting seat and a conductive voltage block. A test bench for placing the battery flat is provided at the bottom of the frame. The clamping mechanism pushes the conductive part to contact the battery and clamp the battery. The servo motor is fixed on the frame and drives the lifting seat to slide up and down through the lead screw nut pair. The conductive voltage block is fixed at the bottom of the lifting seat and faces the test bench. Since the servo motor is used as the power source in the battery withstand voltage insulation test mechanism of the utility model, and the lead screw nut pair is used to drive the lifting seat and the conductive voltage block to move up and down, it has the advantages of short response time and higher test efficiency. At the same time, the servo motor has a larger continuous output range than the cylinder, and can apply pressure from very small to very large to the battery, and the test range is wider.

[0006] 3. A withstand voltage insulation test device for charger production; 202321646611.4; A withstand voltage insulation test device for charger production, relating to the technical field of chargers. It includes a test bench, the lower surface of which is symmetrically provided with a support frame, the upper surface of which is provided with a notch, the upper surface of which is symmetrically provided with a slide groove, the inner surface of which is rotatably connected with a lead screw, the withstand voltage insulation test device for charger production, by providing a connecting line, drives the sliding seat up and down through the second cylinder, drives the insulating pressure plate downward through the movement of the sliding seat, fixes the charger placed in the test slot through the insulating pressure plate, electrically connects the charger with the insulating pressure plate, and detects the charger through the safety tester provided on the test bench, which solves the problem that the current OBC test system uses a linear electronic load isolated from the power grid, does not include safety tests, and many insulation faults caused in the production process cannot be detected, thereby improving practicality.

[0007] Although some insulation withstand voltage test devices are recorded in existing literature, there is no mention of equipment and methods specifically used for insulation withstand voltage testing of power battery trays, and the existing equipment and methods cannot achieve the rapid detection function of the insulation withstand voltage layer of the battery tray. Therefore, the existing technology in this field is still blank. Summary of the invention

[0008] The purpose of the present invention is to provide a synchronous detection method for the insulating and pressure-resistant coating of an aluminum alloy battery tray, which can simultaneously perform voltage insulation and pressure resistance tests on the bottom and side surfaces of the inner cavity of the battery tray, thereby greatly improving the efficiency of the insulating and pressure-resistant coating detection of the battery tray.

[0009] To achieve the above object, the technical solution of the present invention is as follows: A synchronous detection method for the insulating pressure-resistant coating of an aluminum alloy battery tray is provided. The detection head of the detection equipment has multiple detection pressure plates, which are simultaneously pressed on the bottom and side surfaces of each groove in the inner cavity of the battery tray. Multiple planes are detected synchronously to obtain coating detection data corresponding to each groove in the inner cavity of the battery tray by one detection head; the multiple detection pressure plates on the detection head are electrically connected by wires.

[0010] A cantilever hanger is arranged at one end of the frame of the detection equipment, and a plurality of vertical lifting cylinders are installed on the cantilever hanger. The piston heads of the lifting cylinders are connected to the lifting frame, and a plurality of detection heads are fixedly connected below the lifting frame.

[0011] When the battery tray is located directly below the cantilever hanger, the cylinder drives the detection head to descend and contact the inner cavity of the battery tray. The detection head is connected to the insulation withstand voltage tester through a wire. The insulation performance and withstand voltage performance of the surface to be tested are displayed on the tester screen, thereby realizing the insulation detection of the power battery tray. If the insulation layer breaks down, it will be immediately displayed on the tester screen and can be found by naked eyes on the insulation withstand voltage layer of the tray cavity.

[0012] Since the battery tray may be divided into several groove cavities by crossbeams, the number of detection heads matches the number of grooves. Each detection head is connected to the tester through a wire, and each pressure plate in the detection head is electrically connected through a wire. The insulation and withstand voltage parameters detected by any detection head can be seen from the tester.

[0013] The detection head includes a detection positive pressure plate, and the four sides of the detection positive pressure plate are connected to the detection side pressure plate through the side push cylinder. The detection positive pressure plate contacts the bottom surface of the battery tray, and the detection side pressure plate contacts the inner side surface of the battery tray at the same time. Since the detection positive pressure plate and the detection side pressure plate are interconnected through a wire, the detection head is formed into a shape that can contact the entire inner side surface of the battery tray at the same time, and there is no need to separately detect multiple inner side surfaces of the battery tray, which greatly improves the detection efficiency.

[0014] The middle part of the detection positive pressure plate is equipped with an air control valve, which is connected to the side thrust cylinders through air pipes. The four side thrust cylinders are connected in parallel with the air control valve, so that the movements of the side thrust cylinders are unified.

[0015] A slide rail is arranged in the length direction of the upper end surface of the frame, and the slide rail is slidably connected with the slide support plate through a slider, and the battery tray is supported above the slide support plate.

[0016] One side of the frame is the loading and unloading station, and the other side is the inspection station. The battery tray before and after inspection is moved horizontally on the track for loading and unloading, which improves work efficiency. The sliding support plate can be driven manually or by a cylinder.

[0017] The detection method includes the following steps: A. The sliding support plate is located at the loading and unloading station, and the battery tray is placed on the sliding support plate; B. Slide the support plate to the inspection station; C. The lifting cylinder drives the lifting frame to lower each detection head until the detection positive pressure plate contacts and presses the bottom surface of the battery tray; D. Push the side cylinder out until each detection side pressure plate contacts and presses each side of the battery tray cavity; E. Read the test results of the inner cavity of each battery tray groove on the insulation withstand voltage tester. If the data is abnormal, visually check the specific plane of the insulation withstand voltage coating breakdown point and confirm and record it; F. The side push cylinder and lifting cylinder are retracted, and the battery tray returns to the loading and unloading station for unloading.

[0018] Advantages of the invention

[0019] 1. The present invention uses synchronous detection equipment and an insulation withstand voltage tester for coordinated use, and is specifically used for the detection of the insulation withstand voltage coating in the inner cavity of a power battery tray, so as to achieve synchronous detection of the bottom and side surfaces of the inner cavity of the battery tray. Compared with the original single plane manual detection method, the detection efficiency is greatly improved.

[0020] 2. The synchronous detection device in the present invention has a compact overall structure, is easy to operate, and is convenient to maintain.

[0021] 3. The synchronous detection device in the present invention can be used for detecting battery trays of different specifications and sizes by replacing the detection positive pressure plate and the detection side pressure plate, and the scope of use is expanded. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the elevation structure diagram of the synchronous detection equipment; (including battery tray and detection position) Figure 2This is the elevation structure diagram of the synchronous detection equipment; (including battery tray, upper and lower material positions) Figure 3 This is the elevation structure diagram of the synchronous detection equipment; (excluding battery tray, upper and lower material positions) Figure 4 This is the structural elevation diagram of the detection head; (open state) Figure 5 This is the structural elevation diagram of the detection head (in the retracted state) Figure 6 It is a schematic diagram of the connection between the air control valve and the side thrust cylinder air pipe; Figure 7 This is a schematic diagram of the equipment wire connection; The serial numbers and component names in the figure are: 1-frame; 11-slide rail; 12-sliding support plate; 2-cantilever hanger; 21-lifting cylinder; 22-lifting frame; 3-detection head; 31-detection positive pressure plate; 32-detection side pressure plate; 33-air control valve; 34-side thrust cylinder; 4-battery tray. DETAILED DESCRIPTION

[0024] Example 1

[0025] The synchronous detection method of the insulating pressure-resistant coating of an aluminum alloy battery tray is characterized in that: multiple detection pressure plates on the detection head 3 of the detection equipment are simultaneously pressed on the bottom and side surfaces of each groove in the inner cavity of the battery tray 4, and multiple planes are synchronously detected to obtain coating detection data of each groove in the inner cavity of the battery tray 4 corresponding to one detection head 3; multiple detection pressure plates on the detection head 3 are electrically connected by wires.

[0026] A cantilever hanger 2 is arranged at one end of the frame 1 of the detection device, and a plurality of vertical lifting cylinders 21 are installed on the cantilever hanger 2. The piston heads of the lifting cylinders 21 are connected to a lifting frame 22, and three detection heads 3 are fixedly connected below the lifting frame 22.

[0027] Synchronous detection of aluminum alloy battery tray insulation withstand voltage coating equipment, used in conjunction with the HITEK-HEX insulation withstand voltage tester produced by Qingdao Haisiwei Electronic Technology Co., Ltd. Each detection head 3 comprises a detection positive pressure plate 31 , and four side surfaces of the detection positive pressure plate 31 are connected to a detection side pressure plate 32 via a side thrust cylinder 34 .

[0028] An air control valve 33 is installed in the middle of the detection positive pressure plate 31, and the air control valve 33 is connected to the side thrust cylinder 34 through an air pipe.

[0029] A slide rail 11 is provided on the upper end surface of the frame 1 in the length direction. The slide rail 11 is slidably connected to a slide support plate 12 via a slider. The battery tray 4 is supported on the upper side of the slide support plate 12 .

[0030] The detection method includes the following steps: A. The sliding support plate is located at the loading and unloading station, and the battery tray is placed on the sliding support plate; B. Slide the support plate to the inspection station; C. The lifting cylinder drives the lifting frame to lower each detection head until the detection positive pressure plate contacts and presses the bottom surface of the battery tray; D. Push the side cylinder out until each detection side pressure plate contacts and presses each side of the battery tray cavity; E. Read the test results of the inner cavity of each battery tray groove on the insulation withstand voltage tester. If the data is abnormal, visually check the specific plane of the insulation withstand voltage coating breakdown point and confirm and record it; F. The side push cylinder and lifting cylinder are retracted, and the battery tray returns to the loading and unloading station for unloading.

[0031] Application examples: The battery tray in the attached figure is tested by the original manual method. According to the calculation that each groove has 5 inner sides and each battery tray has 3 grooves, if each test goes smoothly, it will take about 15 minutes (excluding loading and unloading time); By adopting the method of the present invention to carry out detection, the three grooves are pressed and tested simultaneously, which only takes 1 minute 10 seconds in total, and the detection efficiency is increased by more than ten times.

[0032]

Claims

1. A synchronous detection method for insulating and pressure-resistant coating of aluminum alloy battery tray, characterized by: The detection head (3) of the detection device has a plurality of detection pressure plates, which are simultaneously pressed on the bottom and side surfaces of each groove in the inner cavity of the battery tray (4), and multiple planes are detected synchronously to obtain coating detection data of each groove in the inner cavity of the battery tray (4) corresponding to one detection head (3); the plurality of detection pressure plates on the detection head (3) are electrically connected via wires.

2. According to claim 1, the synchronous detection method of the insulating pressure-resistant coating of the aluminum alloy battery tray is characterized by: A cantilever hanger (2) is provided at one end of the frame (1) of the detection equipment, a plurality of vertical lifting cylinders (21) are installed on the cantilever hanger (2), the piston heads of the lifting cylinders (21) are connected to the lifting frame (22), and a plurality of detection heads (3) are fixedly connected below the lifting frame (22).

3. According to claim 2, the synchronous detection of insulation and pressure-resistant coating equipment for aluminum alloy battery trays is characterized by: The detection head (3) comprises a detection positive pressure plate (31), and the four side surfaces of the detection positive pressure plate (31) are connected to the detection side pressure plate (32) via side thrust cylinders (34).

4. According to claim 3, the synchronous detection device for insulating and pressure-resistant coating of aluminum alloy battery trays is characterized in that: An air control valve (33) is installed in the middle of the detection positive pressure plate (31), and the air control valve (33) is connected to the side thrust cylinder (34) through an air pipe.

5. According to claim 2, the synchronous detection equipment for insulating and pressure-resistant coating of aluminum alloy battery trays is characterized by: A slide rail (11) is provided on the upper end surface of the frame (1) in the length direction, and the slide rail (11) is slidably connected to a slide support plate (12) via a slider, and the battery tray (4) is supported above the slide support plate (12).

6. According to claim 3, the synchronous detection device for insulating and pressure-resistant coating of aluminum alloy battery trays is characterized in that: The detection method comprises the following steps: A. The sliding support plate is located at the loading and unloading station, and the battery tray is placed on the sliding support plate; B. Slide the support plate to the inspection station; C. The lifting cylinder drives the lifting frame to lower each detection head until the detection positive pressure plate contacts and presses the bottom surface of the battery tray cavity; D. Push the side cylinder out until each detection side pressure plate contacts and presses each side of the battery tray cavity; E. Read the test results of the inner cavity of each battery tray groove on the insulation withstand voltage tester. If the data is abnormal, visually check the specific plane of the insulation withstand voltage coating breakdown point and confirm and record it; F. The side push cylinder and lifting cylinder are retracted, and the battery tray returns to the loading and unloading station for unloading.

Images