A testing device for battery casings of new energy vehicles

Abstract

This invention belongs to the technical field of battery casing testing equipment, and discloses a testing device for new energy vehicle battery casings. The device includes a base, with a fixed clamping assembly, a movable clamping assembly, and a gantry frame connected to the base. The gantry frame is connected to a base frame, which in turn connects to an impact testing assembly, a flatness detection assembly, and an acceleration assembly. The impact testing assembly includes a test steel ball and a telescopic component. The flatness detection assembly is a flatness measuring instrument, including a testing probe and a dial. The acceleration assembly includes a guide cylinder and a power supply, with a coil wound around the outer side of the guide cylinder. This invention utilizes the fixed clamping assembly to clamp and fix the battery casing, the impact testing assembly and the flatness detection assembly to perform impact resistance testing and flatness detection on the battery casing, and the acceleration assembly to accelerate the test ball. The testing device of this invention offers high accuracy, high reliability, high efficiency, and good repeatability in impact resistance testing and flatness detection of battery casings.

Description

Technical Field

[0001] This invention relates to the field of battery casing testing equipment technology, specifically a testing device for new energy vehicle battery casings. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the safety of power batteries has received increasing attention. As a crucial structural component protecting key internal parts such as cells and electrodes, the battery casing's mechanical strength and structural stability directly affect vehicle safety in the event of a collision. Insufficient impact resistance can lead to casing rupture during a collision, potentially causing short circuits, fires, or even explosions. Conversely, insufficient flatness of the battery casing can affect the installation accuracy and heat dissipation of the battery module, resulting in localized overheating or poor contact, also posing safety hazards.

[0003] Existing battery casing testing devices can only perform single-item, single-point testing, requiring multiple devices for segmented testing, resulting in a cumbersome and inefficient process. This is especially true for impact resistance testing and flatness testing, which are independent processes, complicating the testing procedure. Typically, after the impact test, the battery casing needs to be transferred to another coordinate measuring machine or flatness testing device for secondary positioning and measurement. This is not only time-consuming, but the positioning errors introduced by the secondary clamping directly affect the accuracy of the flatness test. Furthermore, most existing impact testing devices use a free-fall method, adjusting the impact velocity by changing the height of the falling ball. This method has low velocity control precision and cannot simulate the dynamic impact requirements under different working conditions. Additionally, the steel ball is prone to deviation during its descent, causing the impact point to deviate from the predetermined position, resulting in poor repeatability and reliability of the test results. Summary of the Invention

[0004] This invention aims to provide a testing device for battery casings of new energy vehicles. An impact testing component and a flatness testing component are simultaneously connected to a base frame. The battery casing is clamped and fixed using a fixed clamping component and a movable clamping component, enabling impact testing and flatness detection of the battery casing. An acceleration component accelerates a test ball to simulate the impact of the test ball on the battery casing at different speeds. This device offers high accuracy, high reliability, high efficiency, and good repeatability in impact testing and flatness detection of the battery casing, solving the problems in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A new energy vehicle battery casing testing device includes a base, a fixed clamping assembly fixedly connected to the base, a movable clamping assembly and a gantry frame tunably connected to the base, the fixed clamping assembly and the movable clamping assembly cooperating with each other for clamping and fixing the battery casing; the gantry frame is connected to a base frame via a third drive assembly; the base frame is connected to an impact testing assembly and a flatness detection assembly, the impact testing assembly including a test steel ball and a steel ball clamping assembly, the steel ball clamping assembly including a pair of telescopic members, the telescopic ends of the pair of telescopic members cooperating with each other for clamping and releasing the test steel ball; the flatness detection assembly abuts against the surface of the battery casing to perform flatness detection; the base frame is also connected to an acceleration assembly, the acceleration assembly including a guide cylinder and a power source, the inner diameter of the guide cylinder not less than the diameter of the test steel ball, a coil wound around the outer side of the guide cylinder, the two ends of the coil being electrically connected to the power source, the test steel ball being accelerated under electromagnetic action when passing through the guide cylinder of the acceleration assembly.

[0007] Furthermore, the pair of telescopic components are mirror-symmetrically arranged with the vertical center plane of the guide cylinder as the reference plane, so that the test steel ball held by the pair of telescopic components is positioned directly above the guide cylinder; the power supply is connected to a contact switch, and the telescopic rod of any one of the telescopic components is connected to an actuating element that cooperates with the contact switch. When the pair of telescopic components are in a clamping state on the test steel ball, the actuating element and the contact switch do not contact each other, and the electrical connection between the power supply and the coil is open circuit. When the pair of telescopic components release the test steel ball, the actuating element and the contact switch abut against each other, and the electrical connection between the power supply and the coil is closed circuit.

[0008] Furthermore, the circuit between the power supply and the coil is also electrically connected to a converter component. The converter component adjusts the magnitude of the current in the circuit by adjusting the value of the resistor connected to the circuit, thereby adjusting the magnitude of the electromagnetic effect of the acceleration component on the test steel ball.

[0009] Furthermore, there is also a pair of flatness detection components, and the pair of flatness detection components are arranged in a mirror symmetrical manner with the vertical center plane of the guide cylinder as the reference plane.

[0010] Furthermore, the telescopic component is an electric telescopic rod; the telescopic end of the telescopic component is connected to an arc-shaped plate, and a pair of arc-shaped plates connected to the telescopic components cooperate with each other to form a " " shape.

[0011] Furthermore, the movable clamping assembly is connected to the base via a first drive assembly, and the gantry frame is connected to the base via a second drive assembly;

[0012] The second drive assembly is provided in two sets. The two sets of the second drive assembly are mirror-symmetrically arranged with the vertical plane of the line connecting the fixed clamping assembly and the movable clamping assembly as the reference plane, and the two connecting columns of the gantry are respectively connected to the two sets of the second drive assembly.

[0013] Furthermore, the first drive assembly includes a first motor connected to the base, the second drive assembly includes a second motor connected to the base, the output shafts of the first motor and the second motor are respectively fixedly connected to a first lead screw, the free end of the first lead screw is rotatably connected to the base, the first lead screw is threadedly connected to a first lead seat, the first lead seat is slidably connected to the base, and the movable clamping assembly and the gantry are respectively connected to the corresponding first lead seat.

[0014] Furthermore, the third drive assembly includes a third motor connected to the gantry frame, the output shaft of the third motor is fixedly connected to a third lead screw, the free end of the third lead screw is rotatably connected to the gantry frame, the third lead screw is threadedly connected to a third lead screw seat, the third lead screw seat is slidably connected to the gantry frame, and the base frame is connected to the third lead screw seat.

[0015] Furthermore, both the fixed clamping assembly and the movable clamping assembly include a connecting seat, and the connecting seat is threadedly connected to a first adjusting bolt. One end of the first adjusting bolt is connected to a handle, and the other end is connected to a circular plate. The connecting seat is also slidably connected to a pair of sliders located on the upper and lower sides of the first adjusting bolt. Each pair of sliders is rotatably connected to a guide rod, and the end of the guide rod away from the slider is rotatably connected to the circular plate.

[0016] Furthermore, the flatness detection component is a flatness detector, which includes a detector body, a detection probe, and a dial. The lower end of the detector body is connected to the detection probe, and the upper end of the detector body is connected to the dial. The detection probe is used to abut against the surface of the battery casing and generate axial displacement. The dial is used to display the displacement value of the detection probe. The detector body is connected to a second adjusting bolt via a thread. The base frame is also connected to a base plate, and the base plate is provided with an adjusting groove that cooperates with the second adjusting bolt.

[0017] The principles and beneficial effects of the technical solution are as follows:

[0018] 1. The present invention provides a new energy vehicle battery casing testing device, which includes a fixed clamping component and a movable clamping component on a base. The movable clamping component is driven to move relative to the fixed clamping component by a first driving component to clamp and fix the battery casing. The gantry is connected to the base through a second driving component, and the base frame is connected to the gantry through a third driving component. An impact testing component and a flatness testing component are connected to the base frame. This allows the impact resistance test and flatness test to be completed sequentially after the battery casing is clamped and fixed once, without the need to transfer the battery casing to other equipment for secondary positioning and measurement. This avoids positioning errors introduced by multiple clamping and effectively improves the testing efficiency and accuracy. The impact testing component uses a pair of telescopic components to clamp the test steel ball. After release, the test steel ball is accelerated to fall under the electromagnetic action of the acceleration component (the coil wound around the outside of the guide cylinder is electrically connected to the power supply. When the test steel ball passes through the guide cylinder, the coil is energized to generate an electromagnetic field, which applies an electromagnetic force to the test steel ball to accelerate it. That is, the guide cylinder, coil, and power supply constitute an electromagnetic accelerator. Its principle is: based on the law of electromagnetic induction and the principle of Lorentz force, the energized coil generates a changing magnetic field, which excites an induced electric field. The free charges in the magnetic object gain kinetic energy under the action of Lorentz force; the acceleration of the test steel ball is achieved by relaying the power on and off of multiple coils). This realizes the impact test on the surface of the battery casing. The flatness detection component directly measures the flatness of the same or nearby position after the impact, realizing the integrated operation of impact resistance testing and flatness detection, effectively solving the problems of cumbersome and inefficient testing procedures in the existing technology.

[0019] 2. This invention provides a new energy vehicle battery casing testing device. A pair of telescopic components are mirror-symmetrically arranged with the vertical center plane of the guide cylinder as the reference plane. This ensures that the test steel ball held by the telescopic components is positioned directly above the guide cylinder, guaranteeing that the test steel ball enters from the center of the guide cylinder after release. This avoids the problem of the impact point deviating from the predetermined position due to steel ball offset, improving the repeatability and reliability of the test results. Simultaneously, a contact switch is connected to the power supply, and the telescopic rod of the telescopic components is connected to an actuating element that cooperates with the contact switch. When the pair of telescopic components holds the test steel ball, the actuating element separates from the contact switch, and the power supply and coil are disconnected. When the pair of telescopic components releases the test steel ball, the actuating element abuts against the contact switch, the circuit is connected, and the coil is energized to generate an electromagnetic field that accelerates the test steel ball. This structure links the release of the steel ball with the connection of the acceleration circuit, ensuring that acceleration begins the instant the steel ball is released, achieving precise timing control and further improving the accuracy of the test.

[0020] 3. The present invention provides a new energy vehicle battery casing testing device, which is electrically connected to a power supply with a converter component, enabling it to adjust the resistance of the circuit, thereby changing the current in the circuit and adjusting the intensity of the electromagnetic field. This allows for precise control of the acceleration and exit velocity of the test steel ball, simulating impact conditions at different speeds, meeting diverse testing needs, and overcoming the shortcomings of traditional free fall methods, such as uncontrollable speed and inability to simulate dynamic impact requirements.

[0021] 4. The present invention provides a new energy vehicle battery casing testing device, which includes a pair of flatness testing components. These components are mirror-symmetrically arranged with the vertical center plane of the guide cylinder as the reference plane, enabling them to measure the flatness of the symmetrical area around the impact point and obtain more comprehensive deformation data. The testing instrument body is connected to the adjustment groove of the base plate via a second adjusting bolt, allowing adjustment of the horizontal position of the flatness testing components relative to the guide cylinder as needed. This adapts to the measurement requirements of battery casings of different sizes or different testing points, further expanding the applicability of the device. The telescopic component is an electric telescopic rod, which is simple in structure and reliable in function. An arc-shaped plate is connected to the telescopic end of the component. The arc-shaped plates connected to the pair of telescopic components cooperate to form a “()” shape, effectively clamping and fixing the test steel ball. This allows for clamping and fixing test steel balls of different diameters, further expanding the applicability of the testing device.

[0022] 5. The present invention provides a new energy vehicle battery casing testing device. The first drive assembly, the second drive assembly, and the third drive assembly all adopt a structure of motor and lead screw seat. The first lead screw seat slides through a through groove opened in the base, and the third lead screw seat slides through a through groove opened in the gantry. The through groove guides and limits the relative movement of the lead screw seats, ensuring the straightness and stability of the movement of the movable clamping assembly and the base frame, improving the position adjustment accuracy of the entire device in the X-axis and Y-axis directions, thereby ensuring the positioning accuracy of the impact test point and the flatness test point, and further improving the reliability of the test results.

[0023] 6. A detection device for a new energy vehicle battery housing. The fixed clamping component and the movable clamping component both include a connecting seat and a first adjusting bolt. The first adjusting bolt is connected to a circular plate. By rotating the first adjusting bolt, the extending length of the circular plate can be adjusted to further meet the clamping requirements of battery housings with different thicknesses. A pair of sliders are also slidably connected to the connecting seat on both the upper and lower sides of the first adjusting bolt. The sliders are rotationally connected to the circular plate through lead rods. When the adjusting bolt is rotated, the sliders and the lead rods can prevent the circular plate from rotating with the adjusting bolt, ensuring the uniformity and stability of the contact between the circular plate and the battery housing. At the same time, the sliders and the lead rods can share the force exerted by the circular plate on the adjusting bolt, making the clamping component受力均匀, improving the stability and reliability of clamping. The connecting seat is provided with a chute with a "convex" cross-section, and the slider is provided with a sliding part that cooperates with the chute. The sliding part is slidably arranged inside the chute to guide and limit the relative movement of the slider, ensuring the smoothness of the adjustment process and the uniformity of the clamping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the front view of a detection device for a new energy vehicle battery housing according to the present invention;

[0025] Figure 2 is Figure 1 the partial enlarged view at A in

[0026] Figure 3 is Figure 1 the sectional view taken along B-B in

[0027] Figure 4 is the top view of a detection device for a new energy vehicle battery housing according to the present invention;

[0028] Figure 5 is the side view of a detection device for a new energy vehicle battery housing according to the present invention;

[0029] Figure 6 is Figure 5 the sectional view taken along C-C in

[0030] Figure 7 is the structural schematic diagram of a detection device for a new energy vehicle battery housing according to the present invention.

[0031] The names of the corresponding reference signs in the drawings are:

[0032] 1. Base; 2. Fixed clamping assembly; 3. Movable clamping assembly; 4. Gantry frame; 5. Base frame; 6. Steel ball clamping assembly; 7. Flatness detection assembly; 8. Acceleration assembly; 9. First drive assembly; 10. Second drive assembly; 11. Third drive assembly; 12. First motor; 13. First lead screw; 14. Connecting seat; 15. Circular plate; 16. First adjusting bolt; 17. Slider; 18. Guide rod; 19. Second motor; 20. Third motor; 21. Third lead screw; 22. Third lead screw; 23. Base plate; 24. Telescopic component; 25. Arc plate; 26. Test steel ball; 27. Detector body; 28. Detection probe; 29. ​​Dial; 30. Second adjusting bolt; 31. Guide cylinder; 32. Coil; 33. Power supply; 34. Contact switch; 35. Actuating component; 36. Converter assembly; 37. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0034] like Figures 1 to 7 As shown, a new energy vehicle battery casing testing device includes a base 1, a fixed clamping assembly 2 fixedly connected to the upper side of the base 1, a movable clamping assembly 3 and a gantry frame 4 tunably connected to the base 1, the fixed clamping assembly 2 and the movable clamping assembly 3 cooperating with each other for clamping and fixing the battery casing; the movable clamping assembly 3 is connected to the base 1 through a first drive assembly 9, the gantry frame 4 is connected to the base 1 through a second drive assembly 10, and the gantry frame 4 is connected to a base frame 5 through a third drive assembly 11; the base frame 5 is connected to an impact testing assembly and a flatness testing assembly. Component 7, the impact testing component includes a test steel ball 27 and a steel ball clamping component 6. The steel ball clamping component 6 includes a pair of telescopic members 25. The telescopic ends of the pair of telescopic members 25 cooperate with each other to clamp and release the test steel ball 27. The acceleration component 8 includes a guide cylinder 32 and a power supply 34. A coil 33 is wound around the outside of the guide cylinder 32. The two ends of the coil 33 are electrically connected to the power supply 34. When the test steel ball 27 passes through the guide cylinder 32 of the acceleration component 8, it is accelerated under electromagnetic action. The flatness detection component 7 abuts against the surface of the battery casing to perform flatness detection. Specifically, the flatness detection component 7 is a flatness detector, which includes a detector body 28, a detection probe 29, and a dial 30. The lower end of the detector body 28 is connected to the detection probe 29, and the upper end of the detector body 28 is connected to the dial 30. The detection probe 29 is used to abut against the surface of the battery casing and generate axial displacement. The dial 30 is used to display the displacement value of the detection probe 29. In this embodiment, the flatness detector is a dial indicator or a micrometer indicator. When its detection probe 29 contacts the surface of the battery casing, the detection probe 29 generates axial displacement as the height of the battery casing surface changes. This displacement is amplified by the internal transmission mechanism and drives the pointer of the dial 30 to deflect, thereby displaying the displacement value on the dial 30.

[0035] like Figure 2As shown, in this embodiment, a pair of telescopic members 25 are mirror-symmetrically arranged with the vertical center plane of the guide cylinder 32 as the reference plane, so that the test steel ball 27 held by the pair of telescopic members 25 is located directly above the guide cylinder 32; the telescopic end of the telescopic member 25 is connected to an arc plate 26, and the arc plates 26 connected to the pair of telescopic members 25 cooperate with each other in a "()" shape, which is used to stably hold the test steel ball 27; the power supply 34 is connected to a contact switch 35, and the telescopic rod of any one of the telescopic members 25 is connected to an actuating member 36 that cooperates with the contact switch 35. When the pair of telescopic members 25 are holding the test steel ball 27, the actuating member 36 and the contact switch 35 do not contact each other, and the electrical connection between the power supply 34 and the coil 33 is open circuit. When the pair of telescopic members 25 release the test steel ball 27, the actuating member 36 abuts against the contact switch 35, and the electrical connection between the power supply 34 and the coil 33 is closed circuit. The circuit between the power supply 34 and the coil 33 is also electrically connected to a converter component 37. The converter component 37 adjusts the magnitude of the current in the circuit by adjusting the value of the resistor connected to the circuit, thereby adjusting the magnitude of the electromagnetic effect of the acceleration component 8 on the test steel ball 27.

[0036] like Figure 2 As shown, a pair of flatness detection components 7 are provided, and the pair of flatness detection components 7 are mirror-symmetrically arranged with the vertical center plane of the guide cylinder 32 as the reference plane; the detector body 28 is connected to the second adjusting bolt 31 by thread; the base frame 5 is also connected to the base plate 24, and the base plate 24 has an adjustment groove that cooperates with the second adjusting bolt 31. By adjusting the position of the second adjusting bolt 31 in the adjustment groove, the horizontal distance of the flatness detection component 7 relative to the guide cylinder 32 can be changed.

[0037] like Figure 7 As shown, the second drive assembly 10 has two sets. The two sets of second drive assemblies 10 are arranged symmetrically in mirror image with the vertical plane connecting the fixed clamping assembly 2 and the movable clamping assembly 3 as the reference plane, and the two connecting columns of the gantry frame 4 are respectively connected to the two sets of second drive assemblies 10. Wherein, as... Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, the first drive assembly 9 includes a first motor 12 connected to the base 1, and the second drive assembly 10 includes a second motor 20 connected to the base 1. The output shafts of the first motor 12 and the second motor 20 are respectively fixedly connected to a first lead screw 13. The free end of the first lead screw 13 is rotatably connected to the base 1. The first lead screw 13 is threadedly connected to a first lead seat 14, which is slidably connected to the base 1. The movable clamping assembly 3 and the gantry frame 4 are respectively connected to the corresponding first lead seats 14. Specifically, the movable clamping assembly 3 is connected to the first lead seat 14 of one set of the first drive assemblies 9, and the two connecting columns of the gantry frame 4 are respectively connected to the first lead seats 14 of two sets of the second drive assemblies 10. Figure 6 and Figure 7 As shown, the third drive assembly 11 includes a third motor 21 connected to the gantry 4. The output shaft of the third motor 21 is fixedly connected to a third lead screw 22. The free end of the third lead screw 22 is rotatably connected to the gantry 4. The third lead screw 22 is threadedly connected to a third lead screw seat 23. The third lead screw seat 23 is slidably connected to the gantry 4. The base frame 5 is connected to the third lead screw seat 23. In this embodiment, the first lead screw 13 and the third lead screw 22 are arranged perpendicular to each other.

[0038] like Figure 5 and Figure 7 As shown, both the fixed clamping assembly 2 and the movable clamping assembly 3 include a connecting seat 15. The connecting seat 15 is threadedly connected to a first adjusting bolt 17. One end of the first adjusting bolt 17 is connected to a handle, and the other end is connected to a circular plate 16. The circular plate 16 is used to abut against the side wall of the battery casing. The connecting seat 15 is also slidably connected to a pair of sliders 18 located on the upper and lower sides of the first adjusting bolt 17. Each pair of sliders 18 is rotatably connected to a guide rod 19. The end of the guide rod 19 away from the slider 18 is rotatably connected to the circular plate 16.

[0039] like Figure 6 As shown, the base 1 has a through groove, and the first thread seat 14 slides through the through groove; the gantry frame 4 has a through groove, and the third thread seat 23 slides through the through groove; the connecting seat 15 has a sliding groove with a "convex" shaped cross section, and the slider 18 has a sliding part that cooperates with the sliding groove, and the sliding part slides inside the sliding groove.

[0040] The specific implementation process is as follows:

[0041] When using this testing device, place the battery casing to be tested on the base 1, with one side abutting against the circular plate 16 of the fixed clamping assembly 2. The electric telescopic rod (telescopic component 25), the first motor 12, the second motor 20, and the third motor 21 are connected to an external power source. Start the first motor 12, which drives the first lead screw 13 to rotate. Under the action of the base 1, the first lead screw seat 14 moves linearly along the circumference of the first lead screw 13, driving the movable clamping assembly 3 to move towards the fixed clamping assembly 2 until the circular plate 16 of the movable clamping assembly 3 abuts against the other side of the battery casing, thus achieving clamping and fixing of the battery casing. During the clamping process, the extension length of the circular plate 16 can be adjusted by rotating the first adjusting bolt 17 to accommodate the clamping requirements of battery casings of different thicknesses. The slider 18 and the guide rod 19 ensure that the circular plate 16 does not rotate with the first adjusting bolt 17 during the adjustment process, maintaining uniform contact with the side wall of the battery casing.

[0042] After clamping is completed, the position of the gantry 4 in the X-axis direction is adjusted by the second drive assembly 10, and the position of the base frame 5 in the Y-axis direction is adjusted by the third drive assembly 11, so that the base frame 5 is moved directly above the point to be tested on the battery casing. Specifically, the second motor 20 drives the first lead screw 13 to rotate, and the first lead screw seat 14 moves linearly along the circumference of the first lead screw 13 under the action of the base 1, driving the gantry 4 to move along the through groove of the base 1 to achieve positioning in the X-axis direction; the third motor 21 drives the third lead screw 22 to rotate, and the third lead screw seat 23 moves linearly along the circumference of the third lead screw 22 under the action of the gantry 4, driving the base frame 5 to move along the through groove of the gantry 4 to achieve positioning in the Y-axis direction.

[0043] After positioning, an impact test is performed. The arc-shaped plates 26 of a pair of telescopic components 25 cooperate to clamp the test steel ball 27. At this time, the actuating element 36 separates from the contact switch 35, and the circuit between the power supply 34 and the coil 33 is open. According to the test requirements, the required current is set through the converter component 37 to control the acceleration speed of the subsequent test steel ball 27. The telescopic components 25 are activated to retract and release the test steel ball 27. At the instant the test steel ball 27 detaches from the arc-shaped plate 26, the actuating element 36 and the contact switch 35 come into contact, the circuit is connected, and the coil 33 is energized to generate an electromagnetic field, applying electromagnetic force to the test steel ball 27 inside the guide cylinder 32, causing it to accelerate and fall, accurately impacting the target point on the battery casing at a preset speed.

[0044] After the impact resistance test, a flatness test is performed. The positions of the base frame 5 are finely adjusted using the second drive assembly 10 and the third drive assembly 11, causing the detection probes 29 of the pair of flatness detection components 7 to move to symmetrical areas around the impact point. Flatness is obtained through the deviation value of multi-point detection. Before the flatness test, a reference point is selected on the surface of the battery casing. The detection probe 29 is then perpendicularly contacted with the selected reference point on the battery casing surface. At this time, the pointer on the dial 30 will point to a certain scale. The value displayed on this scale is set as the reference plane for flatness detection, so that the reading at the detection point is the deviation value relative to this reference plane. Then, multiple detection points are selected around the impact point as needed. The detection probe 29 contacts each detection point on the surface of the battery casing, and the deviation values ​​displayed on the dial 30 are recorded. After the test, the difference between the maximum and minimum deviations is calculated to obtain the flatness of the area. For battery casings of different sizes or different detection points, the horizontal distance between the flatness detection component 7 and the guide cylinder 32 can be changed by adjusting the position of the second adjusting bolt 31 in the adjusting groove of the substrate 24 to adapt to the testing requirements.

[0045] In addition, depending on the testing requirements, different diameter test steel balls 27 can be replaced, and the current can be adjusted in conjunction with the converter component 37 to simulate impact conditions under different masses and speeds. Through the coordinated adjustment of the first drive component 9, the second drive component 10 and the third drive component 11, fixed-point testing can be performed at any position on the horizontal plane of the battery casing, realizing comprehensive testing of multiple points and multiple working conditions.

[0046] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific technical solutions or characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A new energy vehicle battery casing testing device, comprising a base (1), wherein a fixed clamping assembly (2) is fixedly connected to the base (1), and a movable clamping assembly (3) and a gantry frame (4) are tunably connected to the base (1), wherein the fixed clamping assembly (2) and the movable clamping assembly (3) cooperate with each other for clamping and fixing the battery casing; characterized in that, The gantry (4) is connected to the base frame (5) via the third drive assembly (11); the base frame (5) is connected to the impact testing assembly and the flatness detection assembly (7). The impact testing assembly includes a test steel ball (27) and a steel ball clamping assembly (6). The steel ball clamping assembly (6) includes a pair of telescopic members (25). The telescopic ends of the pair of telescopic members (25) cooperate with each other to clamp and release the test steel ball (27). The flatness detection assembly (7) abuts against the surface of the battery casing to perform flatness detection. The base frame (5) is also connected to the acceleration assembly (8). The acceleration assembly (8) includes a guide cylinder (32) and a power supply (34). The inner diameter of the guide cylinder (32) is not less than the diameter of the test steel ball (27). A coil (33) is wound around the outside of the guide cylinder (32). The two ends of the coil (33) are electrically connected to the power supply (34). When the test steel ball (27) passes through the guide cylinder (32) of the acceleration assembly (8), it is accelerated under electromagnetic action. The pair of telescopic members (25) are mirror-symmetrically arranged with the vertical center plane of the guide cylinder (32) as the reference plane, so that the test steel ball (27) held by the pair of telescopic members (25) is located directly above the guide cylinder (32); the power supply (34) is connected to a contact switch (35), and the telescopic rod of any one of the telescopic members (25) is connected to an actuating member (36) that cooperates with the contact switch (35). When the pair of telescopic members (25) is holding the test steel ball (27), the actuating member (36) and the contact switch (35) do not contact each other, and the electrical connection between the power supply (34) and the coil (33) is open circuit. When the pair of telescopic members (25) releases the test steel ball (27), the actuating member (36) abuts against the contact switch (35), and the electrical connection between the power supply (34) and the coil (33) is closed circuit. The circuit between the power supply (34) and the coil (33) is also electrically connected to a converter component (37). The converter component (37) adjusts the magnitude of the current in the circuit by adjusting the magnitude of the resistance connected to the circuit, thereby adjusting the magnitude of the electromagnetic effect of the acceleration component (8) on the test steel ball (27). The flatness detection component (7) is a flatness detector, which includes a detector body (28), a detection probe (29), and a dial (30). The lower end of the detector body (28) is connected to the detection probe (29), and the upper end of the detector body (28) is connected to the dial (30). The detection probe (29) is used to abut against the surface of the battery casing and generate axial displacement. The dial (30) is used to display the displacement value of the detection probe (29). The detector body (28) is connected to a second adjusting bolt (31) by a thread. The base frame (5) is also connected to a base plate (24), which has an adjusting groove that cooperates with the second adjusting bolt (31).

2. The new energy vehicle battery casing testing device according to claim 1, characterized in that, The flatness detection component (7) is also a pair, and the pair of flatness detection components (7) are mirror-symmetrically arranged with the vertical center plane of the guide cylinder (32) as the reference plane.

3. The new energy vehicle battery casing testing device according to claim 2, characterized in that, The telescopic component (25) is an electric telescopic rod; the telescopic end of the telescopic component (25) is connected to an arc plate (26), and the arc plates (26) connected to the telescopic component (25) cooperate with each other to form a "()" shape.

4. The new energy vehicle battery casing testing device according to claim 1, characterized in that, The movable clamping assembly (3) is connected to the base (1) via the first drive assembly (9), and the gantry frame (4) is connected to the base (1) via the second drive assembly (10); The second drive assembly (10) is provided in two sets. The two sets of the second drive assembly (10) are mirror-symmetrically arranged with the vertical plane of the line connecting the fixed clamping assembly (2) and the movable clamping assembly (3) as the reference plane, and the two connecting columns of the gantry (4) are respectively connected to the two sets of the second drive assembly (10).

5. The new energy vehicle battery casing testing device according to claim 4, characterized in that, The first drive assembly (9) includes a first motor (12) connected to the base (1), and the second drive assembly (10) includes a second motor (20) connected to the base (1). The output shafts of the first motor (12) and the second motor (20) are respectively fixedly connected to a first lead screw (13). The free end of the first lead screw (13) is rotatably connected to the base (1). The first lead screw (13) is threadedly connected to a first lead seat (14). The first lead seat (14) is slidably connected to the base (1). The movable clamping assembly (3) and the gantry (4) are respectively connected to the corresponding first lead seat (14).

6. The new energy vehicle battery casing testing device according to claim 5, characterized in that, The third drive assembly (11) includes a third motor (21) connected to the gantry (4). The output shaft of the third motor (21) is fixedly connected to a third lead screw (22). The free end of the third lead screw (22) is rotatably connected to the gantry (4). The third lead screw (22) is threadedly connected to a third lead seat (23). The third lead seat (23) is slidably connected to the gantry (4). The base frame (5) is connected to the third lead seat (23).

7. A new energy vehicle battery casing testing device according to claim 6, characterized in that, Both the fixed clamping assembly (2) and the movable clamping assembly (3) include a connecting seat (15). The connecting seat (15) is connected to a first adjusting bolt (17) by a thread. One end of the first adjusting bolt (17) is connected to a handle, and the other end is connected to a circular plate (16). The connecting seat (15) is also slidably connected to a pair of sliders (18) located on the upper and lower sides of the first adjusting bolt (17). Each pair of sliders (18) is rotatably connected to a guide rod (19). The end of the guide rod (19) away from the slider (18) is rotatably connected to the circular plate (16).

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