A testing device and method for residual thickness of pre-plated nickel steel shell bottom indentation

Abstract

The application discloses a kind of pre-plated nickel steel shell bottom scratch residual thickness testing device and method, including device main body, bottom plate is positioned in the bottom of device main body, top of device main body is fixed with top plate, the top end of top plate is fixed with air cylinder, air cylinder bottom is provided with lifting rod, lifting rod is fixed with connecting plate, the front end of connecting plate is fixed with test cylinder, the bottom of test cylinder is positioned with test assembly.The pre-plated nickel steel shell bottom scratch residual thickness testing device and method of the application, by magnetic attraction positioning and elastic compression structure, solve the measurement error problem caused by burr, inclination, uneven support of steel shell sample in traditional test, adopt cylinder drive lifting test, cooperate with high-precision test head and adjusting assembly, realize the high-precision, high-stability automatic detection of pre-plated nickel steel shell bottom scratch residual thickness, effectively improve test consistency and efficiency, adapt to the quality control demand of battery steel shell explosion-proof performance.

Description

Technical Field

[0001] This invention relates to the field of battery steel shell testing technology, and in particular to a testing device and method for testing the residual thickness of the bottom scratches on a pre-nickel-plated steel shell. Background Technology

[0002] The testing device for the residual thickness of the bottom scratches on pre-plated nickel steel shells is a fixture for positioning and testing pre-plated nickel steel shells. The bottom scratches on the pre-plated nickel steel shells are a key structure for graded explosion of battery cells and improving the safety control of battery explosions. The consistency of the residual thickness of the scratches directly affects the explosion-proof performance of the battery. With the continuous development of technology, people have increasingly higher requirements for the testing device for the residual thickness of the bottom scratches on pre-plated nickel steel shells.

[0003] Existing testing devices for the residual thickness of the bottom scratches on pre-plated nickel steel shells have certain drawbacks in use. Most current testing methods for the residual thickness of the bottom scratches on steel shells follow the explosion-proof cap testing method, which has significant drawbacks in practical application. After the steel shell sample is cut, there are rough edges and uneven edges. The sample is prone to tilting during testing, which requires manual adjustment and results in low testing accuracy. The traditional positioning method using ejector pins and small semi-circular grooves has poor stability and the support platform is uneven, resulting in large deviations and poor repeatability of test results. Excessive manual intervention and low automation levels make it impossible to meet the high-efficiency and accurate testing requirements of mass production, negatively impacting battery safety management. Therefore, this invention proposes a testing device and method for determining the residual thickness of the bottom scratches on a pre-plated nickel steel casing to solve the aforementioned problems. Summary of the Invention

[0004] Technical problem solved: In view of the shortcomings of the existing technology, the present invention provides a testing device and method for the residual thickness of the bottom scratch of a pre-plated nickel steel shell, which has the advantages of accurate positioning, stable testing, high degree of automation and small error, and effectively solves the measurement deviation problems caused by burrs, tilting and unstable positioning of the sample in traditional testing.

[0005] Technical Solution: To achieve the above objectives, the technical solution adopted by this invention is as follows: A testing device for the residual thickness of the bottom scratches on a pre-plated nickel steel shell, comprising a main body, a base plate positioned at the bottom of the main body, a top plate fixed at the top of the main body, a cylinder fixed at the upper end of the top plate, a lifting rod at the bottom of the cylinder, a connecting plate fixed on the lifting rod, a test cylinder fixed at the front end of the connecting plate, a test component positioned at the bottom of the test cylinder, a tester connected to the bottom of the test component, a test head at the bottom of the tester, an adjuster on the outside of the tester, a fixture seat and a test seat fixed at the upper middle part of the base plate, the fixture seat located outside the test seat, a fixture optical axis fixed on the fixture seat, an upper fixture frame on the fixture optical axis, a fixture hole in the middle of the upper fixture frame, and magnets at the four corners of the fixture hole.

[0006] As a preferred technical solution of this application, the test base is provided with positioning pins at all four corners, a terminal base is provided at the upper end of the test base, a terminal adjustment component is provided at the upper end of the terminal base, a test terminal is provided at the upper end of the terminal adjustment component, and a shaft hole is provided on the fixture base, and a quick-installation hole is provided inside the shaft hole.

[0007] As a preferred technical solution of this application, a lubrication ring is provided at the connection between the fixture optical axis and the fixture seat and the upper fixture frame. An upper positioning support plate, a spring assembly, a damper and a lower positioning support plate are provided between the fixture seat and the upper fixture frame. The upper positioning support plate is positioned at the bottom of the upper fixture frame, and the lower positioning support plate is positioned at the upper end of the fixture seat. The spring assembly and the damper are located between the upper positioning support plate and the lower positioning support plate.

[0008] As a preferred technical solution of this application, the test socket is fixed by a positioning pin, the test socket and the terminal block are integrally positioned, and the test terminal is adjusted and positioned on the terminal block by a terminal adjustment component.

[0009] As a preferred technical solution of this application, lubricating oil is injected into the outer wall of the fixture optical axis inside the lubrication ring, and the fixture seat and the upper fixture frame are elastically pressed together by a spring assembly and a damper.

[0010] As a preferred technical solution of this application, the main body, the base plate and the top plate of the device are assembled by bolts. The cylinder drives the lifting rod and drives the connecting plate and the test cylinder to move up and down. The test cylinder drives the tester and the test head to move up and down for adjustment. The adjuster adjusts the tester and the test head.

[0011] A method for testing the residual thickness of the bottom scratch on a pre-nickel-plated steel shell, specifically including the following steps: S1: Sample positioning: Place the bottom sample of the pre-nickel-plated steel shell on the upper end of the test stand. Use the magnets at the four corners of the fixture hole to magnetically attach the bottom of the steel shell to the test plane to eliminate the influence of burrs and tilt of the sample and ensure that the sample is flat. S2: Fixture clamping: The upper fixture frame slides down along the fixture optical axis, and the sample is elastically clamped by the spring assembly and damper. The positioning pin fixes the position of the test seat, and the sample is stably positioned. S3: Parameter Adjustment: Adjust the position of the test terminals using the terminal adjustment component, calibrate the test head accuracy using the adjuster, and set the test parameters; S4: Automatic test: Start the cylinder to drive the lifting rod to lower the test head and detect the residual thickness at the marked position on the bottom of the steel shell. The tester collects data and outputs it. S5: Data Reading: After the test is completed, the cylinder is reset, the sample is taken out, the test data is read, and the single sample test is completed.

[0012] As a preferred technical solution of this application, in step S4, the test head makes vertical contact with the scratched position of the steel shell at a constant low speed, and the tester continuously collects three sets of data and takes the average value as the final residual thickness result.

[0013] Beneficial Effects: Compared with the prior art, the present invention provides a testing device and method for the residual thickness of the bottom scratches on a pre-nickel-plated steel shell, which has the following beneficial effects: The testing device and method for the residual thickness of the bottom scratches on a pre-nickel-plated steel shell solves the measurement error problems caused by burrs, tilting, and uneven support of the steel shell sample in traditional testing by using a magnetic positioning and elastic clamping structure. It adopts a cylinder-driven lifting test, combined with a high-precision test head and adjustment components, to achieve high-precision and high-stability automated detection of the residual thickness of the bottom scratches on the pre-nickel-plated steel shell, effectively improving the consistency and efficiency of testing, and meeting the quality control requirements of the explosion-proof performance of battery steel shells; Magnetic positioning design: The bottom of the steel shell is tightly attached to the test plane by a magnet, which solves the tilting problem caused by burrs and uneven edges of the sample, and greatly improves the flatness and accuracy of the test. Elastic clamping structure: The spring assembly and damper work together to achieve flexible clamping of the sample, avoiding rigid compression that could damage the sample, while ensuring test stability; Automated testing: Cylinder-driven lifting test reduces manual intervention, has high testing efficiency and good repeatability, and is suitable for batch testing; The overall structure is simple: it is easy to assemble and adjust, effectively reducing measurement errors and meeting the requirements for accurate testing of the explosion-proof performance of pre-nickel-plated steel shells, making it highly practical. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a testing device and method for measuring the residual thickness of the bottom scratches on a pre-plated nickel steel shell according to the present invention.

[0015] Figure 2 This is a schematic diagram of the fixture base and upper fixture frame in the testing device and method for measuring the residual thickness of the bottom scratches on a pre-plated nickel steel shell according to the present invention.

[0016] Figure 3 This is a schematic diagram of the fixture base in the testing device and method for measuring the residual thickness of the bottom scratches on a pre-plated nickel steel shell according to the present invention.

[0017] Figure 4 This is a schematic diagram of the upper fixture frame in the testing device and method for measuring the residual thickness of the bottom scratches on a pre-plated nickel steel shell according to the present invention.

[0018] Figure 5 This is a schematic diagram of the inner side of the upper fixture frame in the testing device and method for measuring the residual thickness of the bottom scratches on a pre-plated nickel steel shell according to the present invention.

[0019] Figure 6 This is a schematic diagram of the test seat in the test device and method for testing the residual thickness of the bottom scratches on a pre-plated nickel steel shell according to the present invention.

[0020] Figure 7 This is a side view of the fixture base and upper fixture frame in the test device and method for measuring the residual thickness of the bottom scratches on a pre-plated nickel steel shell according to the present invention.

[0021] In the diagram: 1. Main body of the device; 2. Cylinder; 3. Lifting rod; 4. Top plate; 5. Test cylinder; 6. Test assembly; 7. Test head; 8. Base plate; 9. Fixture seat; 10. Test seat; 11. Fixture optical axis; 12. Upper fixture frame; 13. Tester; 14. Adjuster; 15. Connecting plate; 16. Magnet; 17. Fixture hole; 18. Shaft hole; 19. Quick-release hole; 20. Terminal seat; 21. Test terminal; 22. Terminal adjustment assembly; 23. Positioning pin; 24. Lubricating ring; 25. Upper positioning support plate; 26. Spring assembly; 27. Damper; 28. Lower positioning support plate. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of the present invention, but not all embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] like Figure 1-7 As shown, a testing device for the residual thickness of the bottom scratch on a pre-plated nickel steel shell includes a main body 1. A base plate 8 is positioned at the bottom of the main body 1, and a top plate 4 is fixed to the top of the main body 1. A cylinder 2 is fixed to the upper end of the top plate 4. A lifting rod 3 is provided at the bottom of the cylinder 2, and a connecting plate 15 is fixed to the lifting rod 3. A test cylinder 5 is fixed to the front end of the connecting plate 15. A test assembly 6 is positioned at the bottom of the test cylinder 5, and a tester 13 is connected to the bottom of the test assembly 6. A test head 7 is provided at the bottom of the tester 13, and an adjuster 14 is provided on the outside of the tester 13. A fixture seat 9 and a test seat 10 are fixed at the upper middle part of the base plate 8. The fixture seat 9 is located outside the test seat 10, and a fixture optical axis 11 is fixed on the fixture seat 9. An upper fixture frame 12 is provided on the fixture optical axis 11. The fixture 12 has a fixture hole 17 in the middle, and magnets 16 are set at the four corners of the fixture hole 17. The main body 1, the bottom plate 8 and the top plate 4 are assembled with bolts. The cylinder 2 drives the lifting rod 3 and drives the connecting plate 15 and the test cylinder 5 to move up and down. The test cylinder 5 drives the tester 13 and the test head 7 to move up and down. The adjuster 14 adjusts the tester 13 and the test head 7. Through magnetic positioning and elastic clamping structure, the measurement error caused by burrs, tilting and uneven support of steel shell sample in traditional testing is solved. The cylinder-driven lifting test, combined with a high-precision test head and adjustment components, realizes high-precision and high-stability automated detection of the residual thickness of the bottom scratch of the pre-nickel plated steel shell, effectively improving the consistency and efficiency of testing, and adapting to the quality control requirements of the explosion-proof performance of battery steel shell.

[0026] The test base 10 is positioned with positioning pins 23 at each of its four corners. A terminal base 20 is positioned at the upper end of the test base 10. A terminal adjustment assembly 22 is positioned at the upper end of the terminal base 20. A test terminal 21 is positioned at the upper end of the terminal adjustment assembly 22. A shaft hole 18 is provided on the fixture base 9. A quick-release hole 19 is provided inside the shaft hole 18. The test base 10 is fixed by the positioning pins 23. The test base 10 and the terminal base 20 are integrally positioned. The test terminal 21 is adjusted and positioned on the terminal base 20 by the terminal adjustment assembly 22.

[0027] A lubricating ring 24 is provided at the connection between the fixture optical shaft 11, the fixture seat 9, and the upper fixture frame 12. An upper positioning support plate 25, a spring assembly 26, a damper 27, and a lower positioning support plate 28 are provided between the fixture seat 9 and the upper fixture frame 12. The upper positioning support plate 25 is positioned at the bottom of the upper fixture frame 12, and the lower positioning support plate 28 is positioned at the upper end of the fixture seat 9. The spring assembly 26 and the damper 27 are located between the upper positioning support plate 25 and the lower positioning support plate 28. Lubricating oil is injected into the lubricating ring 24 to the outer wall of the fixture optical shaft 11. The fixture seat 9 and the upper fixture frame 12 are elastically pressed together by the spring assembly 26 and the damper 27.

[0028] A method for testing the residual thickness of the bottom scratch on a pre-nickel-plated steel shell, specifically including the following steps: S1: Sample positioning: Place the bottom sample of the pre-nickel-plated steel shell on the upper end of the test stand. Use the magnets at the four corners of the fixture hole to magnetically attach the bottom of the steel shell to the test plane to eliminate the influence of burrs and tilt of the sample and ensure that the sample is flat. S2: Fixture clamping: The upper fixture frame slides down along the fixture optical axis, and the sample is elastically clamped by the spring assembly and damper. The positioning pin fixes the position of the test seat, and the sample is stably positioned. S3: Parameter Adjustment: Adjust the position of the test terminals using the terminal adjustment component, calibrate the test head accuracy using the adjuster, and set the test parameters; S4: Automatic test: Start the cylinder to drive the lifting rod to lower the test head and detect the residual thickness at the marked position on the bottom of the steel shell. The tester collects data and outputs it. S5: Data Reading: After the test is completed, the cylinder is reset, the sample is taken out, the test data is read, and the single sample test is completed.

[0029] In step S4, the test head makes a constant low-speed vertical contact with the grooved position on the steel shell. The tester continuously collects three sets of data and takes the average value as the final residual thickness result.

[0030] Working Principle: This invention includes a main body 1, a cylinder 2, a lifting rod 3, a top plate 4, a test cylinder 5, a test assembly 6, a test head 7, a base plate 8, a fixture seat 9, a test seat 10, a fixture optical axis 11, an upper fixture frame 12, a tester 13, an adjuster 14, a connecting plate 15, a magnet 16, a fixture hole 17, a shaft hole 18, a quick-release hole 19, a terminal seat 20, a test terminal 21, a terminal adjustment assembly 22, a positioning pin 23, a lubricating ring 24, an upper positioning support plate 25, a spring assembly 26, a damper 27, and a lower positioning support plate 28. Its core working logic is magnetic positioning, elastic clamping, and automatic lifting testing. Sample stable positioning: Place the bottom sample piece of the steel shell into the fixture hole, and use the magnets at the four corners of the fixture hole to firmly attract the bottom surface of the sample piece to the test base plane, completely eliminating the tilting and suspension problems caused by burrs and uneven edges of the sample piece, and ensuring that the test reference surface is absolutely flat.

[0031] Flexible clamping and fixing: The upper fixture frame slides down along the optical axis of the fixture. Under the combined action of the spring assembly and the damper, a uniform and gentle clamping force is applied to the sample, which ensures that the sample does not shake or shift, and avoids damage to the scoring structure by rigid pressure.

[0032] High-precision test drive: The cylinder drives the test cylinder, tester and test head to descend at a uniform speed through the lifting rod, so that the test head makes vertical and stable contact with the scratch position of the steel shell; the regulator calibrates the test accuracy in real time to ensure that the test data is true and reliable.

[0033] Data acquisition and output: After the test head contacts the sample, the tester automatically acquires the residual thickness signal of the scratch and converts it into a numerical output; after a single test is completed, the cylinder automatically resets, and the sample can be quickly replaced for the next test.

[0034] Overall coordination: The positioning pins, terminal adjustment components, lubrication rings and other structures work together to improve the stability and ease of adjustment of the device, enabling the whole system to achieve high precision, high stability and low error continuous batch testing.

[0035] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A testing device for the residual thickness of the bottom scratches on a pre-plated nickel steel shell, comprising a main body (1), characterized in that: The bottom of the main body (1) of the device is positioned with a base plate (8), and the top of the main body (1) is fixed with a top plate (4). A cylinder (2) is fixed at the upper end of the top plate (4). A lifting rod (3) is provided at the bottom of the cylinder (2). A connecting plate (15) is fixed on the lifting rod (3). A test cylinder (5) is fixed at the front end of the connecting plate (15). A test assembly (6) is positioned at the bottom of the test cylinder (5). A tester (13) is connected to the bottom of the test assembly (6). The bottom of the tester (13) is provided with a test head (7), and an adjuster (14) is provided on the outside of the tester (13). The upper middle part of the base plate (8) is fixed with a fixture seat (9) and a test seat (10). The fixture seat (9) is located on the outside of the test seat (10). A fixture optical axis (11) is fixed on the fixture seat (9). An upper fixture frame (12) is provided on the fixture optical axis (11). A fixture hole (17) is provided in the middle of the upper fixture frame (12). Magnets (16) are provided at the four corners of the fixture hole (17).

2. The testing device for the residual thickness of the bottom scratch on a pre-plated nickel steel shell according to claim 1, characterized in that: The test base (10) is provided with positioning pins (23) at all four corners. The test base (10) is provided with a terminal base (20) at its upper end. The terminal base (20) is provided with a terminal adjustment assembly (22) at its upper end. The terminal adjustment assembly (22) is provided with a test terminal (21) at its upper end. The fixture base (9) is provided with a shaft hole (18). The shaft hole (18) is provided with a quick-release hole (19) inside.

3. The testing device for the residual thickness of the bottom scratch on a pre-plated nickel steel shell according to claim 1, characterized in that: A lubrication ring (24) is provided at the connection between the fixture optical axis (11) and the fixture seat (9) and the upper fixture frame (12). An upper positioning support plate (25), a spring assembly (26), a damper (27) and a lower positioning support plate (28) are provided between the fixture seat (9) and the upper fixture frame (12). The upper positioning support plate (25) is positioned at the bottom of the upper fixture frame (12), and the lower positioning support plate (28) is positioned at the upper end of the fixture seat (9). The spring assembly (26) and the damper (27) are located between the upper positioning support plate (25) and the lower positioning support plate (28).

4. The testing device for the residual thickness of the bottom scratch on a pre-plated nickel steel shell according to claim 2, characterized in that: The test socket (10) is fixed by a positioning pin (23), the test socket (10) and the terminal block (20) are integrally positioned, and the test terminal (21) is adjusted and positioned on the terminal block (20) by a terminal adjustment component (22).

5. The testing device for the residual thickness of the bottom scratch on a pre-plated nickel steel shell according to claim 3, characterized in that: Lubricating oil is injected into the inner wall of the jig optical axis (11) through the lubrication ring (24), and the jig seat (9) and the upper jig frame (12) are elastically pressed together by the spring assembly (26) and the damper (27).

6. The testing device for the residual thickness of the bottom scratch on a pre-plated nickel steel shell according to claim 1, characterized in that: The main body (1), bottom plate (8) and top plate (4) of the device are assembled by bolts. The cylinder (2) drives the lifting rod (3) and drives the connecting plate (15) and test cylinder (5) to move up and down. The test cylinder (5) drives the tester (13) and test head (7) to move up and down. The regulator (14) adjusts the tester (13) and test head (7).

7. A method for testing the residual thickness of the bottom scratch on a pre-nickel-plated steel shell, characterized in that: Specifically, the following steps are included: S1: Sample positioning: Place the bottom sample of the pre-nickel-plated steel shell on the upper end of the test stand. Use the magnets at the four corners of the fixture hole to magnetically attach the bottom of the steel shell to the test plane to eliminate the influence of burrs and tilt of the sample and ensure that the sample is flat. S2: Fixture clamping: The upper fixture frame slides down along the fixture optical axis, and the sample is elastically clamped by the spring assembly and damper. The positioning pin fixes the position of the test seat, and the sample is stably positioned. S3: Parameter Adjustment: Adjust the position of the test terminals using the terminal adjustment component, calibrate the test head accuracy using the adjuster, and set the test parameters; S4: Automatic test: Start the cylinder to drive the lifting rod to lower the test head and detect the residual thickness at the marked position on the bottom of the steel shell. The tester collects data and outputs it. S5: Data Reading: After the test is completed, the cylinder is reset, the sample is taken out, the test data is read, and the single sample test is completed.

8. The method for testing the residual thickness of the bottom scratch on a pre-plated nickel steel shell according to claim 7, characterized in that: In step S4, the test head makes a constant low-speed vertical contact with the grooved position on the steel shell, and the tester continuously collects three sets of data and takes the average value as the final residual thickness result.

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