Contact type constant force measuring device for soft button battery

Abstract

The utility model discloses a soft buckle battery contact type constant force measuring device which comprises a supporting mechanism, a product jig and a constant force thickness gauge, the constant force thickness gauge adopts a voice coil motor, the voice coil motor is connected with a thickness measuring pressing block, and the supporting mechanism comprises a rotating platform and a rotating driving mechanism. The rotating platform is connected with the rotating driving mechanism to form a structure capable of rotating horizontally, the plurality of product jigs are mounted on the rotating platform at certain intervals, and the constant-force thickness gauge is suspended above the rotating platform; and a position sensing mechanism for sensing the rotating angle of the rotating platform is arranged beside the rotating platform. Therefore, constant-force thickness measurement can be carried out on flexible battery products such as soft button batteries and the like, and a high-precision measurement effect is achieved. Meanwhile, after one-time measurement is completed, the rotating platform is rotated by a certain angle, the next to-be-measured product is moved into the measuring station while the measured product is moved out of the measuring station, waiting is not needed in the process, and efficiency is remarkably improved. And the whole device is simpler in structure and lower in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production equipment, in particular to a device mainly used for measuring the thickness of soft button batteries. Background Art

[0002] At present, there are three main ways to measure battery thickness in the field of soft button batteries: the first is to use precision slide cylinder + high-precision sensor and PLC program control, but this method is affected by unstable factors such as vacuum air source, which will lead to unstable thickness measurement accuracy, and is more suitable for small and micro enterprises that do not require high battery thickness dimensional accuracy; the second is to use servo motor + screw double guide rail + precision sensor positioning and PLC program control. Compared with the first method, this method is more stable in accuracy, easy to debug and maintain, and suitable for small and medium-sized enterprises that require high battery thickness measurement accuracy. However, due to the accuracy of the servo motor itself, the thickness measurement accuracy cannot meet the special requirements of high-precision battery companies; the third is to focus on system integration, and control the thickness measurement through a highly integrated software system to achieve high accuracy, stable and reliable performance. However, the problem with this method is that the software integration cost is extremely high, and small and medium-sized battery and equipment manufacturers cannot afford it, so it is suitable for large battery companies. In recent years, some people have used the high-precision characteristics of voice coil motors as a driving device to drive the thickness gauge head to achieve constant force distance measurement, thereby improving the accuracy of thickness measurement and significantly reducing costs compared to system integration methods, such as a soft-pack battery size detection device disclosed in patent CN202220163600.X. However, the solution of this patent is more complex in structure and has higher costs. After completing a measurement, the battery to be tested needs to be unloaded and then reinstalled, and then moved into the measurement station for measurement. This process requires waiting for a period of time, which reduces efficiency. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides a soft button battery contact type constant force measuring device which has a simpler structure, a more reasonable design, a lower cost, no waiting time and a higher working efficiency.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a soft button battery contact constant force measuring device, including a supporting mechanism, a product fixture and a constant force thickness gauge, the constant force thickness gauge adopts a voice coil motor, and the voice coil motor is connected to a thickness measuring block, characterized in that: the supporting mechanism includes a rotating platform and a rotating drive mechanism, the rotating platform is connected to the rotating drive mechanism to form a horizontally rotatable structure, a plurality of product fixtures are installed on the rotating platform at a certain interval, and the constant force thickness gauge is suspended above the rotating platform; a position sensing mechanism for sensing the rotation angle of the rotating platform is arranged next to the rotating platform.

[0005] Furthermore, the position sensing mechanism includes a position sensor and a sensing part. The sensing part is arranged on the side of the rotating platform to form a structure that can rotate synchronously with the rotating platform. The position sensor is installed on a support frame and is located on the periphery of the rotating platform. When the rotating platform rotates until the sensing part is aligned with the position sensor, the product fixture carrying the product to be tested is transferred to the measuring station and aligned with the constant force thickness gauge.

[0006] Furthermore, the number of the product jigs is plural, and each product jig is arranged on the rotating platform at the same angle interval; the number of the sensing parts is the same as the number of the product jigs, and they are respectively arranged at the midpoint position between adjacent product jigs at the same angle interval. This sensing structure is extremely simple and effective, low cost, and can more flexibly cope with different numbers of product jigs, achieving the purpose of accurately controlling the position of the product to be tested.

[0007] Preferably, the product fixtures include two, which are symmetrically mounted on the rotating platform at an angle of 180 degrees apart; two sensing parts are arranged on the side of the rotating platform, which are also 180 degrees apart and form a cross-shaped arrangement structure with the two product fixtures.

[0008] Alternatively, the product fixtures include four, which are symmetrically installed on the rotating platform at an angle of 90 degrees apart; four sensing parts are arranged on the side of the rotating platform, which are also 90 degrees apart and form a cross-shaped arrangement structure with the four product fixtures.

[0009] Furthermore, the sensing part extends from the side of the rotating platform to form an L-shaped structure, and the position sensor is a U-shaped structure. When the sensing part rotates with the rotating platform until it enters the position sensor, the rotating platform is controlled to stop rotating.

[0010] Furthermore, the rotary drive mechanism includes a hollow rotary mechanism and a servo motor, the rotary platform is mounted on the hollow rotary mechanism, the hollow rotary mechanism is connected to the servo motor, and the servo motor is mounted on the support frame.

[0011] Furthermore, the constant force thickness gauge is installed on a mounting platform, and the mounting platform is fixed by a mounting bracket; the thickness measuring block extends downward from the bottom of the shell of the constant force thickness gauge.

[0012] The utility model uses a voice coil motor to drive the thickness measuring block. Under the control of the background program and the cooperation of the rotating platform, it can perform constant force thickness measurement on flexible battery products such as soft button batteries, achieving high-precision measurement results. At the same time, after completing a measurement, the rotating platform is rotated by a certain angle, and the product that has been measured is moved out of the measuring station while the next product to be measured is moved into the measuring station. There is no need to wait in between, which can significantly improve efficiency. In addition, the entire device structure is simpler and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional structural diagram of the utility model;

[0014] Figure 2 This is the front structural diagram of the utility model;

[0015] Figure 3 This is a side structural diagram of the utility model.

[0016] In the figure, 1 is a support frame, 11 is a position sensor, 2 is a rotating platform, 21 is a sensing part, 31 is a hollow rotating mechanism, 32 is a servo motor, 4 is a product fixture, 5 is a constant force thickness gauge, 51 is a thickness measuring block, 6 is a mounting bracket, 61 is a mounting platform, and 7 is a product to be tested. DETAILED DESCRIPTION

[0017] In this embodiment, refer to Figure 1-Figure 3 The soft button battery contact constant force measuring device includes a supporting mechanism, a product fixture 4 and a constant force thickness gauge 5. The constant force thickness gauge 5 adopts a voice coil motor, and the voice coil motor is connected to a thickness measuring block 51. The voice coil motor drives the thickness measuring block 51 to move for measurement; the supporting mechanism includes a rotating platform 2 and a rotating drive mechanism. The rotating platform 2 is connected to the rotating drive mechanism to form a horizontally rotatable structure. Several product fixtures 4 are installed on the rotating platform 2 at a certain interval, and the constant force thickness gauge 5 is suspended above the rotating platform 2; a position sensing mechanism for sensing the rotation angle of the rotating platform 2 is arranged next to the rotating platform 2.

[0018] The position sensing mechanism includes a position sensor 11 and a sensing part 21. The sensing part 21 is arranged on the side of the rotating platform 2 to form a structure that can rotate synchronously with the rotating platform 2. The position sensor 11 is installed on a support frame 1 and is located at the periphery of the rotating platform 2. When the rotating platform 2 rotates until the sensing part 21 is aligned with the position sensor 11, the product fixture 4 carrying the product 7 to be measured is transferred to the measuring station and aligned with the constant force thickness gauge 5.

[0019] The number of the product jigs 4 is plural, and each product jig 4 is arranged on the rotating platform 2 at the same angular interval; the number of the sensing parts 21 is the same as the number of the product jigs 4, and they are respectively arranged at the midpoint position between adjacent product jigs 4 at the same angular interval, that is, on the angular bisector of adjacent product jigs 4.

[0020] This embodiment uses two product jigs 4, which are symmetrically mounted on the rotating platform 2 at an angle of 180 degrees apart; two sensing parts 21 are arranged on the side of the rotating platform 2, and the two sensing parts 21 are also 180 degrees apart, and form a cross-shaped arrangement structure with the two product jigs 4. Every time the rotating platform 2 rotates 180 degrees, one of the sensing parts 21 will rotate to align with the position sensor 11, and the rotating platform will stop at this time, and the product jig 4 that has completed the thickness measurement will be transferred out of the measurement station together with the battery product, and the product jig 4 carrying the product 7 to be measured will be transferred into the measurement station at the same time.

[0021] Similarly, the number of product fixtures 4 can be four, six, eight, etc. Taking four as an example, the four product fixtures 4 are symmetrically installed on the rotating platform 2 at an angle of 90 degrees apart; four sensing parts 21 are arranged on the side of the rotating platform 2, and the four sensing parts 21 are also 90 degrees apart, and form a cross-shaped arrangement structure with the four product fixtures 4. In this case, every time the rotating platform 2 rotates 90 degrees, a sensing part 21 will correspond to the position sensor 11, and at the same time, the next product fixture 4 carrying the product 7 to be tested will enter the measurement station. In principle, it is the same as when there are two product fixtures 4, except that the angle of control of rotation is different.

[0022] The sensing portion 21 extends from the side of the rotating platform 2 to form an L-shaped structure, and the position sensor 11 is a U-shaped structure. The sensing portion 21 rotates with the rotating platform 2 until it enters the position sensor 11 and then controls the rotating platform 2 to stop rotating.

[0023] The rotary drive mechanism includes a hollow rotary mechanism 31 and a servo motor 32 . The rotary platform 2 is mounted on the hollow rotary mechanism 31 . The hollow rotary mechanism 31 is connected to the servo motor 32 . The servo motor 32 is mounted on the support frame 1 .

[0024] The constant force thickness gauge 5 is installed on a mounting platform 61 , and the mounting platform 61 is fixed by a mounting bracket 6 ; the thickness measuring block 51 extends downward from the bottom of the housing of the constant force thickness gauge 5 .

[0025] Working principle: Manual or robotic loading to the product fixture 4, the rotating platform 2 rotates to the product to be tested 7 to align with the thickness measuring block 51, and the program controls the voice coil motor to make the thickness measuring block 51 descend for measurement. The measurement process is controlled by three stages of software programs. In the first stage, the voice coil motor controls the thickness measuring block 51 to descend to the specified position, at which time it has not yet contacted the product to be tested 7; in the second stage, the voice coil motor controls the thickness measuring block 51 to continue to descend and contact the battery product 7 at a constant speed; in the third stage, the host computer controls the voice coil motor to output a preset force (such as 1N) to the thickness measuring block 51. When the force reaches the value, the pressure is maintained for a certain time (such as 3 seconds), and the host computer can read the precise value of the battery thickness through the travel of the thickness measuring block 51. After completion, the voice coil motor controls the thickness measuring block 51 to automatically return to wait for the next process.

[0026] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A soft button battery contact constant force measurement device, including a support mechanism, a product fixture and a constant force thickness gauge, the constant force thickness gauge adopts a voice coil motor, the voice coil motor is connected to a thickness measuring block, and is characterized in that: The supporting mechanism includes a rotating platform and a rotating drive mechanism. The rotating platform is connected to the rotating drive mechanism to form a horizontally rotatable structure. Several product fixtures are installed on the rotating platform at a certain interval, and the constant force thickness gauge is suspended above the rotating platform. A position sensing mechanism for sensing the rotation angle of the rotating platform is arranged next to the rotating platform.

2. The soft button battery contact constant force measurement device according to claim 1, characterized in that: The position sensing mechanism includes a position sensor and a sensing part. The sensing part is arranged on the side of the rotating platform to form a structure that can rotate synchronously with the rotating platform. The position sensor is installed on a support frame and is located at the periphery of the rotating platform. When the rotating platform rotates until the sensing part is aligned with the position sensor, the product fixture carrying the product to be measured is transferred to the measuring station and aligned with the constant force thickness gauge.

3. The soft button battery contact constant force measurement device according to claim 2, characterized in that: The number of the product jigs is plural, and each product jig is arranged on the rotating platform at the same angular interval; the number of the sensing parts is the same as the number of the product jigs, and they are respectively arranged at the midpoint position between adjacent product jigs at the same angular interval.

4. The soft button battery contact constant force measurement device according to claim 3, characterized in that: The product fixtures include two, which are symmetrically installed on the rotating platform at an angle of 180 degrees apart; two sensing parts are arranged on the side of the rotating platform, which are also 180 degrees apart and form a cross-shaped arrangement structure with the two product fixtures.

5. The soft button battery contact constant force measurement device according to claim 3, characterized in that: The product fixtures include four, which are symmetrically installed on the rotating platform at an angle of 90 degrees apart; four sensing parts are arranged on the side of the rotating platform, which are also 90 degrees apart and form a cross-shaped arrangement structure with the four product fixtures.

6. The soft button battery contact constant force measurement device according to claim 2, characterized in that: The sensing part extends from the side of the rotating platform to form an L-shaped structure, and the position sensor is a U-shaped structure. The sensing part rotates with the rotating platform until it enters the position sensor and then controls the rotating platform to stop rotating.

7. The soft button battery contact constant force measurement device according to claim 2, characterized in that: The rotary drive mechanism comprises a hollow rotary mechanism and a servo motor. The rotary platform is mounted on the hollow rotary mechanism. The hollow rotary mechanism is connected to the servo motor. The servo motor is mounted on a supporting frame.

8. The soft button battery contact constant force measurement device according to claim 1, characterized in that: The constant force thickness gauge is installed on a mounting platform, and the mounting platform is fixed by a mounting bracket; the thickness measuring block extends downward from the bottom of the shell of the constant force thickness gauge.

Images