Lithium battery aluminum shell size detection positioning device and method

Abstract

The invention discloses a lithium battery aluminum shell size detecting and positioning device and method, belongs to the technical field of lithium battery accessory production, and aims to solve the problems that an existing detecting device is single in function and low in efficiency due to the fact that clamping needs to be conducted for multiple times, and an aluminum shell is prone to deformation. Four groups of clamping parts are symmetrically arranged on the support frame, and a bidirectional screw is used for driving a first clamping plate and a second clamping plate to synchronously clamp an aluminum shell from the inner side and the outer side, so that stable positioning is realized; the internal measuring part drives a distance sensor to rotate through a stepping motor and cooperates with an electric push rod to complete inner cavity size measurement. The external measuring part adopts a similar structure to realize outer wall dimension detection, the support frame is driven by the driving motor to lift, internal and external dimension continuous measurement under one-time clamping is realized, the device reduces positioning errors, avoids aluminum shell deformation, improves detection precision and efficiency, and is suitable for lithium battery aluminum shell production quality control.

Description

Technical Field

[0001] This invention relates to the field of lithium battery accessory manufacturing technology, and in particular to a lithium battery aluminum shell size detection and positioning device and method. Background Technology

[0002] In the manufacturing process of lithium batteries, the aluminum casing is a crucial packaging component, and its dimensional accuracy directly affects the assembly quality, performance stability, and safety of the battery. For example, if the aluminum casing is too large, internal components may loosen during assembly, causing shaking during battery use and potentially leading to short circuits and other safety hazards. Conversely, if the aluminum casing is too small, assembly may be difficult, or even damage internal components, similarly affecting battery performance. Therefore, accurate measurement and positioning of the lithium battery aluminum casing is a critical step in ensuring the quality of lithium battery production.

[0003] Currently, while some devices exist on the market for detecting the dimensions of aluminum casings in lithium batteries, these devices can only measure the internal or external dimensions of the casing separately, and cannot simultaneously acquire both internal and external dimensional information in a single inspection. This not only increases the complexity and time cost of the inspection process, but may also lead to positioning errors caused by multiple clamping of the aluminum casing, affecting the accuracy of the dimensional detection.

[0004] In addition, existing testing devices often use simple clamping structures when positioning aluminum shells. When clamping aluminum shells, this structure is prone to deformation due to uneven clamping force distribution or improper clamping method, which further affects the accuracy of dimensional detection and may even cause the aluminum shells to be scrapped due to deformation, resulting in increased production costs.

[0005] To address the aforementioned problems, this technical solution proposes a lithium battery aluminum shell size detection and positioning device and method. Summary of the Invention

[0006] The purpose of this invention is to solve the problems of existing detection devices having limited functions, requiring multiple clamping operations leading to low efficiency, and easily deformable aluminum shells, and to propose a lithium battery aluminum shell size detection and positioning device and method.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A lithium battery aluminum casing size detection and positioning device, comprising:

[0009] Base;

[0010] The top plate is fixedly mounted above the base via multiple guide rails;

[0011] A support frame, slidably connected to the guide rail, is used to support the battery casing;

[0012] Multiple clamping components are symmetrically arranged on the support frame to clamp the side wall of the battery casing from both the inside and outside for positioning.

[0013] An internal measuring component, mounted on the base, is used to measure the internal dimensions of the battery casing;

[0014] An external measuring component, mounted on the top plate, is used to measure the external dimensions of the battery casing;

[0015] The support frame can drive the clamped battery casing to move along the guide rail, so as to alternately enter the measurement area of ​​the internal measuring component and the external measuring component, so as to complete the measurement of internal and external dimensions in one clamping.

[0016] In one possible design, the clamping component includes a first clamping plate and a second clamping plate slidably connected to the top of the support frame, the first clamping plate and the second clamping plate being located on the inner and outer sides of the battery housing, respectively; the top of the support frame has a moving slot, and the clamping component also includes a transmission component disposed on the top of the support frame and partially extending into the moving slot, the transmission component being connected to the first clamping plate and the second clamping plate, respectively, to drive the two to move synchronously towards or away from each other.

[0017] In one possible design, the transmission assembly includes a mounting plate fixed to the top of the support frame, a bidirectional screw rotatably connected to the mounting plate, a threaded ring threaded to one side of the bidirectional screw, and a movable component threaded to the other side of the bidirectional screw.

[0018] The threaded ring is connected to the first clamping plate via a mounting rod;

[0019] The bottom of the movable component extends into the movable groove and is connected to the second clamping plate via a connecting frame;

[0020] Rotating the bidirectional screw can drive the threaded ring and the moving component to move in opposite directions, thereby causing the first clamping plate and the second clamping plate to move towards each other to clamp the battery casing.

[0021] In one possible design, the moving component includes a threaded plate threaded to the bidirectional screw, the bottom of the threaded plate being fixed to the connecting frame, and the connecting frame being slidably connected to the inner wall of the moving groove.

[0022] In one possible design, it also includes two symmetrical drive motors, an adjusting screw driven by the drive motors, and an adjusting nut that is threadedly engaged with the adjusting screw;

[0023] The two drive motors are symmetrically fixed to the top plate, the adjusting nut is fixed to the support frame, and the bottom end of the adjusting screw is rotatably connected to the base.

[0024] The drive motor drives the adjusting screw to rotate, and the adjusting nut drives the support frame to rise and fall along the guide rail.

[0025] In one possible design, the internal measuring component includes a first stepper motor, a first mounting bracket driven to rotate by the first stepper motor, two first electric push rods symmetrically arranged on the first mounting bracket, and two first distance sensors driven by the two first electric push rods and arranged opposite to each other.

[0026] The two first distance sensors are electrically connected to a controller;

[0027] The first electric push rod drives the first distance sensor to move horizontally to contact or detach from the inner wall of the battery casing, and the first stepper motor drives the first mounting bracket to rotate to switch the measurement direction.

[0028] In one possible design, the external measuring component includes a second stepper motor, a second mounting bracket driven to rotate by the second stepper motor, two second electric push rods symmetrically arranged on the second mounting bracket, and two second distance sensors driven by the two second electric push rods and arranged opposite to each other.

[0029] The two second distance sensors are electrically connected to a controller;

[0030] The second electric push rod drives the second distance sensor to move horizontally to contact or detach from the outer wall of the battery casing, and the second stepper motor drives the second mounting bracket to rotate to switch the measurement direction.

[0031] A method of using the lithium battery aluminum casing size detection and positioning device described above includes the following steps:

[0032] S1. Place the aluminum casing of the lithium battery to be tested on the support frame, ensuring that it is centered, and that the four first clamps are located on the inner side of the aluminum casing and the four second clamps are located on the outer side of the aluminum casing.

[0033] S2. Rotate the bidirectional screws on the four clamping components in sequence. The rotation of the bidirectional screws drives the threaded ring and the mounting rod to push the first clamping plate outward. At the same time, it drives the threaded plate and the connecting frame to push the second clamping plate inward, so that the first clamping plate and the second clamping plate clamp the battery aluminum shell from the inside and outside, thus completing the positioning.

[0034] S3. Start the two drive motors. The drive motors drive the adjusting screw to rotate. Through the threaded transmission with the adjusting nut, the drive support frame and the clamped battery aluminum shell move downwards until the aluminum shell moves to the measurement height of the internal measuring component.

[0035] S4. Start the first stepper motor of the internal measuring component to drive the first mounting bracket and the two first distance sensors to rotate, so that the sensors are aligned with a measuring direction inside the aluminum shell to be measured.

[0036] S5. Simultaneously activate the two first electric push rods to push the two first fixed plates and the first distance sensor away from each other until the sensors contact the inner walls of both sides of the aluminum shell. Record and calculate the internal dimensions in this direction through the controller.

[0037] S6. Restart the first electric push rod to retract the first distance sensor from the inner wall, then start the first stepper motor to drive the first mounting bracket to rotate 90 degrees. Repeat step S5 to measure the dimensions of the aluminum shell in another direction.

[0038] S7. After the internal dimensions are measured, start the drive motor to rotate in the opposite direction, which will drive the support frame and the battery aluminum shell to move upward until the aluminum shell moves to the measurement height of the external measuring components.

[0039] S8. Start the second stepper motor of the external measuring component to drive the second mounting bracket and two second distance sensors to rotate, so that the sensors are aligned with a measuring direction outside the aluminum shell to be measured.

[0040] S9. Simultaneously activate the two second electric push rods to push the two second fixed plates and the second distance sensor closer to each other until the second fixed plates contact the outer walls on both sides of the aluminum shell. Record and calculate the external dimensions in this direction through the controller.

[0041] S10. Start the second electric push rod to move the second fixed plate outward and separate it from the outer wall of the aluminum shell. Then start the second stepper motor to drive the second mounting bracket to rotate 90 degrees. Repeat step S9 and measure the dimensions of the aluminum shell in another direction.

[0042] S11. After all measurements are completed, drive the support frame down to a height that is easy to operate, rotate the four bidirectional screws in the opposite direction, loosen the first and second clamping plates, and remove the measured battery aluminum shell.

[0043] Beneficial effects: In this invention, the lithium battery aluminum shell size detection and positioning device, through the clamping component, can place the battery shell on the support frame, and place the first clamping plate and the second clamping plate on the outer and inner sides of the battery shell respectively. Then, by operating the transmission component, the first clamping plate and the second clamping plate can be driven to move closer to each other, thereby clamping and positioning the battery shell, so as to keep the battery shell in a stable state when measuring the inside and outside of the battery shell.

[0044] In this invention, the lithium battery aluminum shell size detection and positioning device, through its internal measuring components, allows for the downward movement of the battery shell, during which two first distance sensors are moved into the battery shell. Then, by activating two first electric push rods, the two first distance sensors are moved away from each other until they are in contact with the inner walls of both sides of the battery shell. This allows for the measurement of the inner dimensions of the battery shell. After measuring the dimensions in one direction, the two first electric push rods are simultaneously activated to move two first fixing plates to their initial positions. Then, by activating a first stepper motor, the first mounting bracket is rotated by 60°. Next, by activating the two first electric push rods, the two first distance sensors are brought into contact with the inner walls of the other two sides of the battery shell, allowing for the measurement of the dimensions of the battery shell in another direction.

[0045] In this invention, a lithium battery aluminum shell size detection and positioning device, through an external measuring component, can move a second fixed plate away from the second mounting bracket by activating two second electric push rods. Then, by moving the battery shell upwards between the two second fixed plates, the two second electric push rods are activated to move two second distance sensors closer together until the two second fixed plates contact the outer sides of the battery shell. This allows the two second distance sensors to cooperate in measuring the outer dimensions of the battery shell. After detection in one direction is completed, the second electric push rods are activated again to move the second fixed plate away from the battery shell. Then, a second stepper motor is activated to rotate the second fixed plate by 60 degrees. Finally, the two second electric push rods are activated to move the two second distance sensors closer together until the second fixed plate contacts the other side of the battery shell, thus enabling the measurement of the battery shell's dimensions in another direction.

[0046] This invention can simultaneously acquire internal and external dimensional information of the aluminum casing of lithium batteries in a single inspection, reducing inspection complexity and time costs, minimizing positioning errors, and employing a special clamping structure to prevent deformation of the aluminum casing due to external forces, ensuring inspection accuracy, preventing the aluminum casing from being scrapped due to deformation, reducing production costs, and effectively ensuring the quality of lithium battery production. Attached Figure Description

[0047] Figure 1 This is a first-view three-dimensional structural schematic diagram of a lithium battery aluminum shell size detection and positioning device proposed in this invention.

[0048] Figure 2 This is a three-dimensional schematic diagram of the second-view structure of a lithium battery aluminum shell size detection and positioning device proposed in this invention.

[0049] Figure 3This is a three-dimensional schematic diagram of the connection structure of two drive motors, two adjusting screws and support frame of a lithium battery aluminum shell size detection and positioning device proposed in this invention.

[0050] Figure 4 This is a three-dimensional schematic diagram of the support frame and the connection structure of four clamping mechanisms of a lithium battery aluminum shell size detection and positioning device proposed in this invention;

[0051] Figure 5 This is a three-dimensional cross-sectional schematic diagram of the support frame structure of the lithium battery aluminum shell size detection and positioning device proposed in this invention;

[0052] Figure 6 This is a three-dimensional schematic diagram of the connection structure between the first clamping plate and the second clamping plate of the lithium battery aluminum shell size detection and positioning device proposed in this invention.

[0053] Figure 7 This is a three-dimensional schematic diagram of the connection structure of the first stepper motor, the first mounting frame, and the two first electric push rods of the lithium battery aluminum shell size detection and positioning device proposed in this invention.

[0054] Figure 8 This is a three-dimensional schematic diagram of the connection structure of the second stepper motor, the second mounting bracket, and the two second electric push rods of a lithium battery aluminum shell size detection and positioning device proposed in this invention.

[0055] In the diagram: 1. Base; 2. Guide rail; 3. Top plate; 4. Support frame; 5. Drive motor; 6. Adjusting screw; 7. Adjusting nut; 8. Battery casing; 9. Protective cover; 10. First clamping plate; 11. Second clamping plate; 12. Moving slot; 13. Mounting plate; 14. Bidirectional screw; 15. Threaded ring; 16. Mounting rod; 17. Threaded plate; 18. Connecting frame; 19. First protective box; 20. First stepper motor; 21. First mounting frame; 22. First electric push rod; 23. First fixing plate; 24. First distance sensor; 25. Second protective box; 26. Second stepper motor; 27. Second mounting frame; 28. Second electric push rod; 29. ​​Second fixing plate; 30. Second distance sensor. Detailed Implementation

[0056] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0057] In one embodiment: Refer to Figure 1-8A positioning device includes a base 1. Four guide rails 2 are symmetrically and vertically fixed on the top of the base 1, and the top ends of these four guide rails 2 are jointly and fixedly connected to a horizontal top plate 3. A support frame 4 is slidably connected to these four guide rails 2, allowing it to stably rise and fall vertically along the guide rails 2. The support frame 4 is the core component for positioning and supporting the battery casing 8. Four identical clamping components are symmetrically arranged on the support frame 4, corresponding to the four sides of the battery casing 8, for clamping and positioning from both the inside and outside.

[0058] like Figure 4-6 As shown, each clamping component is implemented as follows: A mounting plate 13 is provided on the top of the support frame 4. A first clamping plate 10 and a second clamping plate 11 are slidably connected to the top of the support frame 4. In the initial state, the first clamping plate 10 is located closer to the inner side of the mounting plate 13, and the second clamping plate 11 is located further away from the mounting plate 13 on the outer side. A through-hole moving slot 12 is provided on the top of the support frame 4. A bidirectional screw 14 passes through the mounting plate 13 and is rotatably connected to it. On one side of the mounting plate 13, a threaded ring 15 is threaded onto the bidirectional screw 14, and two mounting rods 16 are symmetrically fixed on the threaded ring 15. The other ends of these two mounting rods 16 are fixedly connected to one side of the first clamping plate 10. On the other side of the mounting plate 13, a threaded plate 17 is threaded onto the bidirectional screw 14. The bottom of the threaded plate 17 extends downward into the moving groove 12, and a connecting bracket 18 is fixedly installed on one side of its bottom. This connecting bracket 18 is also located within the moving groove 12 and slidably connected to the inner wall of the moving groove 12. The top side of the connecting bracket 18 is fixedly connected to the bottom of the second clamping plate 11. When the bidirectional screw 14 is turned manually or with a tool, the threaded ring 15 and the threaded plate 17 move simultaneously away from the mounting plate 13 due to the opposite direction of the threads. The threaded ring 15 pushes the first clamping plate 10 outward through the mounting rod 16, while the threaded plate 17 pushes the second clamping plate 11 inward through the connecting bracket 18, thereby bringing the first clamping plate 10 and the second clamping plate 11 closer together, ultimately firmly clamping the side wall of the battery housing 8 placed between them. With all four clamping components operating simultaneously, the battery housing 8 can be completely fixed from four directions.

[0059] like Figure 2-3As shown, to drive the support frame 4 and the clamped battery casing 8 to move vertically, two drive motors 5 are symmetrically fixedly installed on the top of the top plate 3. The output shaft of each drive motor 5 passes downward through the top plate 3 and is fixedly connected to a vertical adjusting screw 6. On the top of the support frame 4, two adjusting nuts 7 corresponding to the positions of the adjusting screws 6 are symmetrically fixedly installed. The bottom end of the adjusting screw 6 passes through the corresponding adjusting nut 7 and the through hole on the support frame 4 in sequence, and finally achieves a rotatable connection with the top of the base 1 through a bearing. The two adjusting screws 6 and the two adjusting nuts 7 form threaded transmission pairs respectively. When the two drive motors 5 are started simultaneously, the two adjusting screws 6 rotate synchronously, driving the adjusting nuts 7 and driving the entire support frame 4 to rise or fall smoothly along the guide rail 2. In order to protect the adjusting screws 6, two protective covers 9 are also symmetrically fixed on the top of the base 1, covering the lower part of the two adjusting screws 6 respectively. The top of the protective cover 9 is fixedly connected to the bottom of the top plate 3.

[0060] This application can be used in the field of lithium battery accessory manufacturing technology, or in other fields applicable to this application.

[0061] In another embodiment: Reference Figure 7-8 Based on the above embodiments, an improvement is made to a lithium battery aluminum shell size detection and positioning device, which is applied to the field of lithium battery accessory production technology. The structure of this embodiment is basically the same as the previous embodiments, except that the device includes an independent internal measuring component for measuring the internal cavity size of the battery shell 8. This component is located at the top center of the base 1. A first protective box 19 is fixed on the base 1, and a first stepper motor 20 is installed inside it. The output axis of the first stepper motor 20 extends upward from the first protective box 19 and is fixedly mounted with a U-shaped first mounting bracket 21. On the inner walls of both sides of the first mounting bracket 21, a first electric push rod 22 is fixedly mounted. The push rod of each first electric push rod 22 extends horizontally outward, and a first fixing plate 23 is fixed at the end. A first distance sensor 24 is mounted on the upper surface of each first fixing plate 23. The measuring ends of the two first distance sensors 24 are arranged opposite each other, and they are electrically connected to the same controller through wires. When the support frame 4 descends, allowing the opening of the battery casing 8 to face downwards and cover the two first distance sensors 24, the two first electric push rods 22 are activated, pushing the two first distance sensors 24 horizontally outwards until their measuring ends contact the inner wall of the battery casing 8. The controller can then calculate the inner cavity dimension in that direction based on the displacement data of the two sensors. After measuring one direction, the first electric push rod 22 retracts the sensor, and the first stepper motor 20 drives the first mounting frame 21 to rotate 90 degrees. The same process can then be used to measure the inner cavity dimension in the other vertical direction.

[0062] like Figure 8As shown, the device also includes a separate external measuring component for measuring the outer wall dimensions of the battery housing 8. This component is located at the bottom center of the top plate 3. A second protective box 25 is fixed to the bottom of the top plate 3, and a second stepper motor 26 is installed inside it. The output shaft of the second stepper motor 26 extends downward from the second protective box 25 and is fixedly mounted on an inverted U-shaped second mounting bracket 27. A second electric push rod 28 is fixedly mounted on each of the two inner walls of the second mounting bracket 27. The push rod of each second electric push rod 28 extends horizontally outward, and a second fixing plate 29 is fixed at its end. A second distance sensor 30 is mounted on the lower surface of each second fixing plate 29. The measuring ends of the two second distance sensors 30 are arranged opposite each other and are also electrically connected to the controller. When the support frame 4 rises, placing the battery housing 8 between the two second fixing plates 29, the two second electric push rods 28 are activated, pushing the two second distance sensors 30 to move horizontally inward until the second fixing plate 29 contacts the outer wall of the battery housing 8. The controller can then calculate the outer wall dimension in that direction based on the sensor displacement data. After measuring one direction, the second electric push rod 28 moves the sensor outward, and the second stepper motor 26 drives the second mounting bracket 27 to rotate 90 degrees. The outer wall dimension in another vertical direction can then be measured using the same procedure.

[0063] This technical solution also includes a programmable logic controller (PLC), which is electrically connected to two drive motors 5, a first stepper motor 20, two first electric push rods 22, a second stepper motor 26, two second electric push rods 28, a first distance sensor 24, and a second distance sensor 30. The PLC is configured to execute the following control flow: Upon receiving an operation command, it first controls the drive motors 5 to move the support frame 4 to the internal measurement station; then it controls the first stepper motor 20 to rotate to a preset angle, and simultaneously controls the two first electric push rods 22 to extend until the first distance sensor 24 provides a contact signal, records the data, and then retracts the push rods; next, it controls the first stepper motor 20 to rotate 90 degrees to perform the measurement in the next direction; after the internal measurement is completed, it controls the drive motors 5 to move the support frame 4 to the external measurement station and executes a similar external measurement cycle. The steps S1-S11 of the usage method are automatically executed by the PLC according to a preset program.

[0064] This invention proposes a method for using the lithium battery aluminum casing size detection and positioning device described above, comprising the following steps:

[0065] S1. Place the aluminum shell 8 of the lithium battery to be tested on the support frame 4, ensuring that its position is centered, and that the four first clamping plates 10 are located on the inner side of the aluminum shell and the four second clamping plates 11 are located on the outer side of the aluminum shell.

[0066] S2. Rotate the bidirectional screws 14 on the four clamping components in sequence. The rotation of the bidirectional screws 14 drives the threaded ring 15 and the mounting rod 16 to push the first clamping plate 10 outward. At the same time, it drives the threaded plate 17 and the connecting frame 18 to push the second clamping plate 11 inward, so that the first clamping plate 10 and the second clamping plate 11 clamp the battery aluminum shell 8 from the inside and outside sides, and the positioning is completed.

[0067] S3. Start the two drive motors 5. The drive motors 5 drive the adjusting screw 6 to rotate. Through the thread transmission with the adjusting nut 7, the drive support frame 4 and the clamped battery aluminum shell 8 move downward until the aluminum shell moves to the measurement height of the internal measuring component.

[0068] S4. Start the first stepper motor 20 of the internal measuring component, drive the first mounting bracket 21 and the two first distance sensors 24 to rotate, so that the sensors are aligned with a measuring direction inside the aluminum shell to be measured.

[0069] S5. Simultaneously activate the two first electric push rods 22 to push the two first fixed plates 23 and the first distance sensor 24 away from each other until the sensors contact the inner walls of both sides of the aluminum shell. Record and calculate the internal dimensions in this direction through the controller.

[0070] S6. Restart the first electric push rod 22 to retract the first distance sensor 24 and detach it from the inner wall. Then start the first stepper motor 20 to drive the first mounting bracket 21 to rotate 90 degrees. Repeat step S5 to measure the dimensions of the aluminum shell in another direction.

[0071] S7. After the internal dimensions are measured, start the drive motor 5 to rotate in the opposite direction, driving the support frame 4 and the battery aluminum shell 8 to move upward until the aluminum shell moves to the measurement height of the external measuring component.

[0072] S8. Start the second stepper motor 26 of the external measuring component to drive the second mounting bracket 27 and the two second distance sensors 30 to rotate, so that the sensors are aligned with a measuring direction outside the aluminum shell to be measured.

[0073] S9. Simultaneously activate the two second electric push rods 28 to push the two second fixed plates 29 and the second distance sensor 30 closer to each other until the second fixed plates 29 contact the outer walls on both sides of the aluminum shell. Record and calculate the external dimensions in this direction through the controller.

[0074] S10. Start the second electric push rod 28 to move the second fixed plate 29 outward and separate it from the outer wall of the aluminum shell. Then start the second stepper motor 26 to drive the second mounting bracket 27 to rotate 90 degrees. Repeat step S9 and measure the dimensions of the aluminum shell in another direction.

[0075] S11. After all measurements are completed, drive the support frame 4 to a height that is convenient for operation, rotate the four bidirectional screws 14 in the opposite direction, loosen the first clamping plate 10 and the second clamping plate 11, and remove the measured battery aluminum shell 8.

[0076] However, as is well known to those skilled in the art, the working principles and wiring methods of the drive motor 5, the first stepper motor 20, the first electric push rod 22, the first distance sensor 24, the second stepper motor 26, the second electric push rod 28, and the second distance sensor 30 are conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0077] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0078] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A lithium battery aluminum casing size detection and positioning device, characterized in that, include: Base (1); The top plate (3) is fixedly mounted above the base (1) via multiple guide rails (2); The support frame (4) is slidably connected to the guide rail (2) and is used to support the battery casing (8); Multiple clamping components are symmetrically arranged on the support frame (4) to clamp the side wall of the battery housing (8) from the inside and outside simultaneously to achieve positioning; An internal measuring component is mounted on the base (1) for measuring the internal dimensions of the battery casing (8); An external measuring component is mounted on the top plate (3) for measuring the external dimensions of the battery casing (8); The support frame (4) can drive the clamped battery casing (8) to move along the guide rail (2) to alternately enter the measurement area of ​​the internal measuring component and the external measuring component, so as to complete the measurement of internal and external dimensions in one clamping.

2. The lithium battery aluminum shell size detection and positioning device according to claim 1, characterized in that, The clamping component includes a first clamping plate (10) and a second clamping plate (11) slidably connected to the top of the support frame (4). The first clamping plate (10) and the second clamping plate (11) are located on the inner and outer sides of the battery casing (8), respectively. The top of the support frame (4) is provided with a moving groove (12). The clamping component also includes a transmission component disposed on the top of the support frame (4) and partially extending into the moving groove (12). The transmission component is connected to the first clamping plate (10) and the second clamping plate (11) respectively to drive them to move synchronously towards or away from each other.

3. The lithium battery aluminum shell size detection and positioning device according to claim 2, characterized in that, The transmission assembly includes a mounting plate (13) fixed to the top of the support frame (4), a bidirectional screw (14) rotatably connected to the mounting plate (13), a threaded ring (15) threaded to one side of the bidirectional screw (14), and a moving component threaded to the other side of the bidirectional screw (14). The threaded ring (15) is connected to the first clamping plate (10) via a mounting rod (16); The bottom of the movable component extends into the movable groove (12) and is connected to the second clamping plate (11) via a connecting frame (18); Rotating the bidirectional screw (14) can drive the threaded ring (15) and the moving member to move in opposite directions, thereby causing the first clamping plate (10) and the second clamping plate (11) to move towards each other to clamp the battery casing (8).

4. The lithium battery aluminum shell size detection and positioning device according to claim 3, characterized in that, The movable component includes a threaded plate (17) threadedly connected to the bidirectional screw (14), and the bottom of the threaded plate (17) is fixed with the connecting frame (18), which is slidably connected to the inner wall of the movable groove (12).

5. The lithium battery aluminum shell size detection and positioning device according to claim 1, characterized in that, It also includes two symmetrical drive motors (5), an adjusting screw (6) driven by the drive motors (5), and an adjusting nut (7) threadedly engaged with the adjusting screw (6); Two drive motors (5) are symmetrically fixed to the top plate (3), the adjusting nut (7) is fixed to the support frame (4), and the bottom end of the adjusting screw (6) is rotatably connected to the base (1); The drive motor (5) drives the adjusting screw (6) to rotate, and the adjusting nut (7) drives the support frame (4) to rise and fall along the guide rail (2).

6. The lithium battery aluminum shell size detection and positioning device according to claim 1, characterized in that, The internal measuring components include a first stepper motor (20), a first mounting frame (21) driven to rotate by the first stepper motor (20), two first electric push rods (22) symmetrically arranged on the first mounting frame (21), and two first distance sensors (24) driven by the two first electric push rods (22) and arranged opposite to each other; The two first distance sensors (24) are electrically connected to a controller; The first electric push rod (22) drives the first distance sensor (24) to move horizontally to contact or detach from the inner wall of the battery housing (8), and the first stepper motor (20) drives the first mounting bracket (21) to rotate to switch the measurement direction.

7. The lithium battery aluminum shell size detection and positioning device according to claim 1, characterized in that, The external measuring components include a second stepper motor (26), a second mounting bracket (27) driven to rotate by the second stepper motor (26), two second electric push rods (28) symmetrically arranged on the second mounting bracket (27), and two second distance sensors (30) driven by the two second electric push rods (28) and arranged opposite to each other; The two second distance sensors (30) are electrically connected to a controller; The second electric push rod (28) drives the second distance sensor (30) to move horizontally to contact or detach from the outer wall of the battery housing (8), and the second stepper motor (26) drives the second mounting bracket (27) to rotate to switch the measurement direction.

8. A method of using the lithium battery aluminum shell size detection and positioning device according to any one of 1-8, characterized in that, Includes the following steps: S1. Place the aluminum shell (8) of the lithium battery to be tested on the support frame (4) to ensure that it is centered and that the four first clamping plates (10) are located on the inner side of the aluminum shell and the four second clamping plates (11) are located on the outer side of the aluminum shell. S2. Rotate the bidirectional screws (14) on the four clamping components in sequence. The bidirectional screws (14) rotate and drive the threaded ring (15) and the mounting rod (16) to push the first clamping plate (10) outward. At the same time, they drive the threaded plate (17) and the connecting frame (18) to push the second clamping plate (11) inward, so that the first clamping plate (10) and the second clamping plate (11) clamp the battery aluminum shell (8) from the inside and outside, and complete the positioning. S3. Start the two drive motors (5). The drive motors (5) drive the adjusting screw (6) to rotate. Through the thread transmission with the adjusting nut (7), the drive support frame (4) and the clamped battery aluminum shell (8) move downward until the aluminum shell moves to the measurement height of the internal measuring component. S4. Start the first stepper motor (20) of the internal measuring component to drive the first mounting bracket (21) and the two first distance sensors (24) to rotate, so that the sensors are aligned with a measuring direction inside the aluminum shell to be measured; S5. Simultaneously activate the two first electric push rods (22) to push the two first fixed plates (23) and the first distance sensor (24) away from each other until the sensors contact the inner walls of both sides of the aluminum shell. Record and calculate the internal dimensions in this direction through the controller. S6. Start the first electric push rod (22) again to retract the first distance sensor (24) from the inner wall, and then start the first step motor (20) to drive the first mounting bracket (21) to rotate 90 degrees. Repeat step S5 to measure the dimensions of the aluminum shell in another direction. S7. After the internal dimensions are measured, start the drive motor (5) to rotate in the opposite direction, which will drive the support frame (4) and the battery aluminum shell (8) to move upward until the aluminum shell moves to the measurement height of the external measuring component. S8. Start the second stepper motor (26) of the external measuring component, drive the second mounting bracket (27) and the two second distance sensors (30) to rotate, so that the sensors are aligned with a measuring direction outside the aluminum shell to be measured; S9. Simultaneously activate two second electric push rods (28) to push two second fixed plates (29) and the second distance sensor (30) closer to each other until the second fixed plates (29) contact the outer walls on both sides of the aluminum shell. Record and calculate the external dimensions in this direction through the controller. S10. Start the second electric push rod (28) to move the second fixed plate (29) outward and separate it from the outer wall of the aluminum shell. Then start the second stepper motor (26) to drive the second mounting bracket (27) to rotate 90 degrees. Repeat step S9 and measure the dimensions of the aluminum shell in another direction. S11. After all measurements are completed, drive the support frame (4) down to a height that is convenient for operation, rotate the four bidirectional screws (14) in the opposite direction, loosen the first clamp (10) and the second clamp (11), and remove the measured battery aluminum shell (8).

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