Battery box cover air tightness detection equipment

Abstract

The utility model discloses a battery box cover air tightness detection equipment belongs to detection equipment technical field, it includes support base, detection platform is fixed on support base, is used for bearing the battery box cover of detection, and the detection platform is provided with a plurality of evenly distributed inlet and outlet air hole, annular sealing and pressing mechanism includes a plurality of pressing assembly around the detection platform, is used for the top, front side, back side and both sides of battery box cover simultaneously exert pressing force, forms sealed space, gas path control mechanism is connected with inlet and outlet air hole, is used for filling into the gas in the battery box cover after sealing, pressure -maintaining test and pressure relief, control mechanism and annular sealing and pressing mechanism, gas path control mechanism are all electricity connection. The utility model detection equipment positive pressure test, effectively reduces the welding tiny sand eye, improves the yield, reduces the detection time -consuming, reduces the artificial cost.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment technology, specifically, it relates to a battery box cover airtightness testing device. Background Technology

[0002] Battery box covers are typically welded from multiple components, and the quality of this welding directly determines the overall sealing and safety performance of the battery pack, affecting whether it meets the IP67 or higher protection rating requirements. Currently, the industry widely uses the traditional "weld inspection penetrant" method to test the sealing performance of battery box cover welds (such as the eight welds formed after laser full welding). This method uses a weld inspection penetrant to check for defects such as incomplete welds, false welds, and pinholes. If the weld inspection penetrant appears on the other side of the product during testing, it indicates that the product does not meet the IP67 protection requirements. It needs to be cleaned and re-welded, and then the product is inspected again with the weld inspection penetrant until it meets the IP67 requirements.

[0003] This traditional testing method has many inherent flaws and can no longer meet the requirements of modern intelligent manufacturing for quality, efficiency, and data. The main problems are as follows:

[0004] 1. There are instances of missed detections and under-discoveries due to human subjective factors;

[0005] 2. There are minute weld defects that are objectively undetectable;

[0006] 3. Testing is time-consuming and labor-intensive. Utility Model Content

[0007] To solve the above problems, the present invention adopts the following technical solution:

[0008] A battery box cover airtightness testing device, comprising:

[0009] Support base;

[0010] The testing platform is fixed on the support base and is used to support the battery box cover to be tested. The testing platform is provided with multiple evenly distributed air inlets and outlets.

[0011] A circumferential sealing and clamping mechanism includes multiple clamping components arranged around the detection platform, which are used to simultaneously apply clamping force to the top, front, rear and sides of the battery box cover to form a sealed space;

[0012] A gas path control mechanism is connected to the air inlet and outlet ports and is used to fill gas into the sealed battery box cover, perform pressure holding tests, and release pressure.

[0013] The control mechanism is electrically connected to both the circumferential sealing and pressing mechanism and the air circuit control mechanism.

[0014] Furthermore, the circumferential sealing and clamping mechanism includes:

[0015] Multiple top clamping components are symmetrically arranged on both sides of the detection platform along the length direction of the detection platform, and are used to clamp the top of the battery box cover;

[0016] Multiple front pressure plate assemblies are disposed on the front side of the detection platform to press the front side of the battery box cover and the front flange edge.

[0017] Multiple side pressure plate assemblies are symmetrically arranged on both sides of the detection platform along the length direction of the detection platform, and are used to press the side flange edge of the battery box cover.

[0018] Multiple rear pressure plate assemblies are disposed on the rear side of the detection platform to press the rear flange edge of the battery box cover side.

[0019] Furthermore, the contact surfaces between the pressing ends of the top pressing assembly, the front pressing plate assembly, the side pressing plate assembly, and the rear pressing plate assembly and the battery box cover are all provided with elastic sealing layers.

[0020] Furthermore, the elastic sealing layer is made of silicone material with a Shore hardness of 35.

[0021] Furthermore, the top clamping assembly includes:

[0022] A top pressure plate cylinder support frame is fixed on the support base;

[0023] A top pressure plate cylinder, the fixed end of which is fixed on the top pressure plate cylinder support frame, and the driving end is hinged to a top clamping block. The top clamping block is set at an angle to the driving end of the top pressure plate cylinder, and is used to press the sealing top pressure plate that can be detachably placed on the top of the battery box cover. The top pressure plate cylinder is electrically connected to the control mechanism.

[0024] Two top pressure plate cylinder limiting blocks are symmetrically arranged on the side of the top pressure plate cylinder near the detection platform, and are used to install and limit the sealing top pressure plate;

[0025] Two top connecting rods are symmetrically arranged on both sides of the top pressing block, and the first end of the top connecting rod is hinged to the top pressing block, and the second end is hinged to the fixed end of the top pressure plate cylinder.

[0026] Further, the front pressure plate assembly includes:

[0027] A front pressure plate cylinder support frame is fixed on the support base;

[0028] A sealing front pressure plate cylinder, wherein the fixed end of the sealing front pressure plate cylinder is fixed on the front pressure plate cylinder support frame, the driving end is connected to the sealing front pressure plate, and the sealing front pressure plate cylinder is electrically connected to the control mechanism.

[0029] Furthermore, the side pressure plate assembly has the same structure as the rear pressure plate assembly, wherein the side pressure plate assembly includes:

[0030] Side cylinder support seat, the side cylinder support seat is fixed on the support base;

[0031] A sealing side pressure plate cylinder has its fixed end fixed on the side cylinder support seat, and its driving end hinged to a side clamping block. The side clamping block is set at an angle to the driving end of the sealing side pressure plate cylinder, and the bottom end of the side clamping block is connected to a sealing side pressure plate. Both the sealing side pressure plate cylinder and the sealing rear pressure plate cylinder are electrically connected to the control mechanism.

[0032] Two side connecting rods are symmetrically arranged on both sides of the side clamping block, and the first end of the side connecting rod is hinged to the side clamping block, and the second end is hinged to the fixed end of the sealing side pressure plate cylinder.

[0033] Furthermore, pressure sensors are provided on the top clamping block, the front sealing plate, the side sealing plate, and the rear sealing plate, and the contact surfaces of the side sealing plate, the front sealing plate, and the rear sealing plate with the product are made of fluororubber.

[0034] Furthermore, the gas path control mechanism includes:

[0035] An air pump is connected to multiple air inlets and outlets via pipelines to provide detection gas. The pipelines are equipped with a pressure relief valve, a precision pressure regulating valve, and a proportional valve. The air pump, the pressure relief valve, the precision pressure regulating valve, and the proportional valve are all connected to the control mechanism.

[0036] Furthermore, the control mechanism includes a controller and a main control operation screen. The controller is electrically connected to the main control operation screen and is communicatively connected to the MES system for uploading detection data to the MES system.

[0037] The beneficial effects of this utility model are:

[0038] In this utility model testing equipment, the sealing side pressure plate, the sealing front pressure plate, and the sealing rear pressure plate are all made of fluororubber on their contact surfaces with the product, ensuring that under the action of compression, they can effectively fill the micro-unevenness of the product surface and form a reliable sealing inspection.

[0039] This new testing equipment can detect the parts of a product that require testing, thereby reducing the product defect rate.

[0040] This utility model's testing equipment uses positive pressure testing, which effectively reduces fine pinholes in welding, improves yield, reduces testing time, and lowers labor costs.

[0041] This new type of testing equipment can detect the specific pressure relief locations of a product in one go, and complete the repair welding in one go, thereby reducing production costs.

[0042] This invention replaces the use of penetrant (chemical reagent) testing for weld seam inspection, improves the working environment for employees, and enhances health protection. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of a battery box cover airtightness testing device according to the present invention;

[0044] Figure 2 This is a schematic diagram of the airtightness testing device for a battery box cover according to this utility model from another perspective;

[0045] Figure 3 This is a partial schematic diagram of a battery box cover airtightness testing device according to the present invention. Figure 1 ;

[0046] Figure 4 This is a partial schematic diagram of a battery box cover airtightness testing device according to the present invention. Figure 2 ;

[0047] Figure 5 This is a flowchart of the product airtightness testing process for a battery box cover airtightness testing device according to this utility model;

[0048] Figure 6 This is a schematic diagram of the eight weld seams formed after laser full welding in the background art.

[0049] In the diagram: 1. Support base; 2. Testing platform; 3. Air inlet and outlet; 4. Top pressure plate; 5. Top pressure plate cylinder; 6. Front sealing pressure plate; 7. Front sealing pressure plate cylinder; 8. Side sealing pressure plate; 9. Side sealing pressure plate cylinder; 10. Rear sealing pressure plate; 11. Rear sealing pressure plate cylinder; 12. Air inlet; 13. Air outlet; 14. Top pressure plate cylinder limit block; 15. Weld. Detailed Implementation

[0050] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0051] Example 1

[0052] refer to Figures 1 to 5 A battery box cover airtightness testing device, comprising:

[0053] Support base 1;

[0054] The testing platform 2 is fixed on the support base 1 and is used to support the battery box cover to be tested. The testing platform 2 is provided with multiple evenly distributed air inlet and outlet holes 3.

[0055] The circumferential sealing and clamping mechanism includes multiple clamping components arranged around the detection platform 2, which are used to simultaneously apply clamping force to the top, front, rear and sides of the battery box cover to form a sealed space.

[0056] The gas path control mechanism is connected to the air inlet and outlet 3 and is used to fill the sealed battery box cover with gas, perform pressure holding tests and depressurize.

[0057] Preferably, there are 20 air inlets and outlets.

[0058] The control mechanism is electrically connected to the circumferential sealing and pressing mechanism and the air circuit control mechanism.

[0059] This new testing equipment can test all the parts of a product that need to be tested, and there will be no missed tests or defective products.

[0060] This utility model's testing equipment uses positive pressure testing, which can avoid minor pinholes in welding, improve yield, reduce testing time, and lower labor costs.

[0061] Example 2

[0062] To improve practicality, this embodiment has been further modified based on embodiment 1.

[0063] In this embodiment, the circumferential sealing and clamping mechanism includes:

[0064] Multiple top clamping components are symmetrically arranged on both sides of the detection platform 2 along the length direction of the detection platform 2, and are used to clamp the top of the battery box cover;

[0065] Multiple front pressure plate assemblies are arranged on the front side of the detection platform 2 to press the front side of the battery box cover and the front flange edge.

[0066] Multiple side pressure plate assemblies are symmetrically arranged on both sides of the testing platform 2 along the length direction of the testing platform 2, and are used to press the side flange edge of the battery box cover.

[0067] Multiple rear pressure plate assemblies are located on the rear side of the testing platform 2 and are used to press the rear flange edge of the battery box cover side.

[0068] In this embodiment, the contact surfaces between the pressing ends of the top pressing assembly, the front pressing plate assembly, the side pressing plate assembly, and the rear pressing plate assembly and the battery box cover are all provided with elastic sealing layers.

[0069] In this embodiment, the elastic sealing layer is made of silicone material with a Shore hardness of approximately 35.

[0070] In this embodiment, the top clamping assembly includes:

[0071] Top pressure plate cylinder support frame, the top pressure plate cylinder support frame is fixed on the support base 1;

[0072] The top pressure plate cylinder 5 has its fixed end fixed on the top pressure plate cylinder support frame, and its driving end is hinged with a top clamping block. The top clamping block is set at an angle to the driving end of the top pressure plate cylinder 5. It is used to press the sealing top pressure plate 4, which can be detachably placed on the top of the battery box cover. The top pressure plate cylinder 5 is electrically connected to the control mechanism.

[0073] In practice, the top pressing block is moved 90° by controlling the air pressure to loosen / press the product.

[0074] Two top pressure plate cylinder limiting blocks 14 are symmetrically arranged on the side of the top pressure plate cylinder 5 near the detection platform 2, and are used to install and limit the sealing of the top pressure plate 4.

[0075] In practice, it is important to prevent positive pressure testing from causing product dimensional deformation.

[0076] Two top connecting rods are symmetrically arranged on both sides of the top pressing block, with the first end of the top connecting rod hinged to the top pressing block and the second end hinged to the fixed end of the top pressing plate cylinder 5.

[0077] Preferably, there are 8 sealing top pressure plates 4.

[0078] In this embodiment, the front pressure plate assembly includes:

[0079] Front pressure plate cylinder support frame, the front pressure plate cylinder support frame is fixed on the support base 1;

[0080] The sealing front pressure plate cylinder 7 has its fixed end fixed on the sealing front pressure plate cylinder 7 support frame, and its driving end connected to the sealing front pressure plate 6. The sealing front pressure plate cylinder 7 is electrically connected to the control mechanism.

[0081] In this embodiment, the side pressure plate assembly and the rear pressure plate assembly have the same structure, wherein the side pressure plate assembly includes:

[0082] Side cylinder support seat, the side cylinder support seat is fixed on the support base 1;

[0083] The sealing side pressure plate cylinder 9 has its fixed end fixed on the side cylinder support seat, and its driving end is hinged to a side clamping block. The side clamping block is set at an angle to the driving end of the sealing side pressure plate cylinder 9. The bottom end of the side clamping block is connected to a sealing side pressure plate 8. The sealing side pressure plate cylinder 9 is electrically connected to the control mechanism. Both the sealing side pressure plate cylinder 9 and the sealing rear pressure plate cylinder 11 are electrically connected to the control mechanism.

[0084] Two side connecting rods are symmetrically arranged on both sides of the side clamping block, and the first end of the side connecting rod is hinged to the side clamping block, and the second end is hinged to the fixed end of the sealing side pressure plate cylinder 9.

[0085] In this embodiment, the gas path control mechanism includes:

[0086] An air pump is connected to multiple air inlets and outlets 3 via pipelines to provide detection gas. The pipelines are equipped with a pressure relief valve, a precision pressure regulating valve, and a proportional valve. The air pump, pressure relief valve, precision pressure regulating valve, and proportional valve are all connected to the control mechanism. The air inlet of the air pump is connected to the air inlet 12, and the air outlet of the pressure relief valve is connected to the air outlet 13. The air inlet 12 and the air outlet 13 are located on one side of the main control panel.

[0087] In practice, the testing equipment is equipped with precision pressure regulating valves and proportional valves to quickly and accurately establish and maintain the test pressure.

[0088] The testing equipment of this invention can adjust parameters according to product testing requirements to achieve testing for most protection levels.

[0089] In this embodiment, pressure sensors are provided on the top clamping block, the front sealing plate 6, the side sealing plate 8, and the rear sealing plate 10. The contact surfaces of the side sealing plate 8, the front sealing plate 6, and the rear sealing plate 10 with the product are made of fluororubber.

[0090] Preferably, the pressure sensor is a high-resolution pressure sensor with 0.01%FS, low drift, and low hysteresis.

[0091] The sealing side pressure plate 8, sealing front pressure plate 6, and sealing rear pressure plate 10 of this utility model are made of fluororubber material with high elasticity, low compression set, and aging resistance. The reasonable design of the sealing groove structure and compression amount ensures that the micro-unevenness of the product surface can be effectively filled under the action of compression, forming a reliable sealing band.

[0092] The sealing plate of this new testing equipment has a flexible pressure head, which ensures that the product is reliably sealed and prevents product damage or excessive deformation.

[0093] In this embodiment, the bottom of the support base 1 is provided with multiple hydraulic support rods and omnidirectional wheels are provided around it.

[0094] Example 3

[0095] To improve data traceability, this embodiment makes further settings based on embodiment 2.

[0096] In this embodiment, the control mechanism includes a controller and a main control operation screen. The controller is electrically connected to the main control operation screen and is communicatively connected to the MES system for uploading detection data to the MES system.

[0097] In practice, the detection equipment can perform time-pressure / flow curve analysis to identify large leaks, slow leaks, and locate leak areas. The detection equipment can combine historical data and use the SPC method to set dynamic thresholds, thereby improving the detection rate and reducing false positives. The detection equipment supports communication with the MES system to upload test results, equipment status, alarm information, etc., to achieve production data traceability and quality monitoring.

[0098] This new testing equipment can digitize product test data and determine the actual protection level of the product.

[0099] The testing process of this utility model includes the following steps:

[0100] S1. The testing equipment shall be connected to the power supply (configured power supply: AC220V / 50Hz) and air pressure (configured air source: 0.4~0.6Mp) in sequence and according to requirements.

[0101] S2. Install the battery box cover into the testing equipment as required;

[0102] S3. Manually place the 8 sealing top pressure plates into the top pressure plate cylinder limit block respectively (the limit block and the cylinder are fixedly connected by screws);

[0103] S4. The start button on the main control screen presses the sealing side pressure plate, sealing front pressure plate, top pressure plate and sealing rear pressure plate firmly into the battery box cover by the cylinder, so as to achieve a tooling seal with the testing equipment platform and prevent air leakage. The protection can reach IP68 (the tooling and sealing pressure plate have silicone of about 35 degrees Shore to ensure sealing and protect against damage to the product).

[0104] S5. The main control screen inputs an air pressure of 3.5±0.5KPa that meets the IP67 requirement, and sets the positive pressure time of 60s and the pressure holding time of 60s. The air pressure is used to test the airtightness of the product through 20 air inlets and outlets evenly distributed at the bottom, and the product is depressurized and removed after the test is completed.

[0105] S6. Press the start test button on the main control screen to begin testing and detecting the airtightness of the product.

[0106] In practice, the main control panel controls the actions of various components of the equipment, including controlling the sealing of parts that do not require testing, setting the positive pressure test value for the product, the test time, testing the internal air pressure value of the product, calculating the leakage amount, and uploading to the MES system.

[0107] See Figure 6 The eight weld seams formed after laser full welding are located at position 15.

[0108] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model are included within the protection scope of this utility model.

Claims

1. A battery box cover airtightness testing device, characterized in that, include: Support base; The testing platform is fixed on the support base and is used to support the battery box cover to be tested. The testing platform is provided with multiple evenly distributed air inlets and outlets. A circumferential sealing and clamping mechanism includes multiple clamping components arranged around the detection platform, which are used to simultaneously apply clamping force to the top, front, rear and sides of the battery box cover to form a sealed space; A gas path control mechanism is connected to the air inlet and outlet ports and is used to fill gas into the sealed battery box cover, perform pressure holding tests, and release pressure. The control mechanism is electrically connected to both the circumferential sealing and pressing mechanism and the air circuit control mechanism.

2. The battery box cover airtightness testing device according to claim 1, characterized in that, The circumferential sealing and pressing mechanism includes: Multiple top clamping components are symmetrically arranged on both sides of the detection platform along the length direction of the detection platform, and are used to clamp the top of the battery box cover; Multiple front pressure plate assemblies are disposed on the front side of the detection platform to press the front side of the battery box cover and the front flange edge. Multiple side pressure plate assemblies are symmetrically arranged on both sides of the detection platform along the length direction of the detection platform, and are used to press the side flange edge of the battery box cover. Multiple rear pressure plate assemblies are disposed on the rear side of the detection platform to press the rear flange edge of the battery box cover side.

3. The battery box cover airtightness testing device according to claim 2, characterized in that, The contact surfaces between the pressing ends of the top pressing assembly, the front pressing plate assembly, the side pressing plate assembly, and the rear pressing plate assembly and the battery box cover are all provided with elastic sealing layers.

4. The battery box cover airtightness testing device according to claim 3, characterized in that, The elastic sealing layer is made of silicone material with a Shore hardness of 35.

5. The battery box cover airtightness testing device according to claim 2, characterized in that, The top clamping assembly includes: A top pressure plate cylinder support frame is fixed on the support base; A top pressure plate cylinder, the fixed end of which is fixed on the top pressure plate cylinder support frame, and the driving end is hinged to a top clamping block. The top clamping block is set at an angle to the driving end of the top pressure plate cylinder, and is used to press the sealing top pressure plate that can be detachably placed on the top of the battery box cover. The top pressure plate cylinder is electrically connected to the control mechanism. Two top pressure plate cylinder limiting blocks are symmetrically arranged on the side of the top pressure plate cylinder near the detection platform, and are used to install and limit the sealing top pressure plate; Two top connecting rods are symmetrically arranged on both sides of the top pressing block, and the first end of the top connecting rod is hinged to the top pressing block, and the second end is hinged to the fixed end of the top pressure plate cylinder.

6. The battery box cover airtightness testing device according to claim 5, characterized in that, The front pressure plate assembly includes: A front pressure plate cylinder support frame is fixed on the support base; A sealing front pressure plate cylinder, wherein the fixed end of the sealing front pressure plate cylinder is fixed on the front pressure plate cylinder support frame, the driving end is connected to the sealing front pressure plate, and the sealing front pressure plate cylinder is electrically connected to the control mechanism.

7. The battery box cover airtightness testing device according to claim 6, characterized in that, The side pressure plate assembly has the same structure as the rear pressure plate assembly, wherein the side pressure plate assembly includes: Side cylinder support seat, the side cylinder support seat is fixed on the support base; A sealing side pressure plate cylinder has its fixed end fixed on the side cylinder support seat, and its driving end hinged to a side clamping block. The side clamping block is set at an angle to the driving end of the sealing side pressure plate cylinder, and the bottom end of the side clamping block is connected to a sealing side pressure plate. Both the sealing side pressure plate cylinder and the sealing rear pressure plate cylinder are electrically connected to the control mechanism. Two side connecting rods are symmetrically arranged on both sides of the side clamping block, and the first end of the side connecting rod is hinged to the side clamping block, and the second end is hinged to the fixed end of the sealing side pressure plate cylinder.

8. The battery box cover airtightness testing device according to claim 7, characterized in that, Pressure sensors are provided on the top clamping block, the front sealing plate, the side sealing plate, and the rear sealing plate. The contact surfaces of the side sealing plate, the front sealing plate, and the rear sealing plate with the product are made of fluororubber.

9. The battery box cover airtightness testing device according to claim 1, characterized in that, The gas path control mechanism includes: An air pump is connected to multiple air inlets and outlets via pipelines to provide detection gas. The pipelines are equipped with a pressure relief valve, a precision pressure regulating valve, and a proportional valve. The air pump, the pressure relief valve, the precision pressure regulating valve, and the proportional valve are all connected to the control mechanism.

10. The battery box cover airtightness testing device according to claim 1, characterized in that, The control mechanism includes a controller and a main control operation screen. The controller is electrically connected to the main control operation screen and is communicatively connected to the MES system for uploading detection data to the MES system.

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