Device and method for measuring the dimensions of cylindrical lithium battery grooves

Abstract

This invention relates to the field of lithium battery manufacturing technology, and provides a cylindrical lithium battery groove dimension measuring device and method. The cylindrical lithium battery groove dimension measuring device includes: a measuring platform, a feeding mechanism, and a contour measuring instrument; the measuring platform is provided with a measuring position; the feeding mechanism is used to transfer the cylindrical lithium battery after the groove process is completed to the measuring position, and the bottom of the cylindrical lithium battery located at the measuring position is connected to the measuring platform; the contour measuring instrument is set on the measuring platform, and the detection end of the contour measuring instrument is used to extend into the open end of the cylindrical lithium battery, and the contour measuring instrument is used to measure the distance between the side wall of the groove near the open end and the open end; this invention improves the efficiency and accuracy of measurement while ensuring the comprehensiveness of the measurement by performing batch inspection of the end height dimension of the groove.

Description

Technical Field

[0001] This invention relates to the field of lithium battery production technology, and in particular to a device and method for measuring the dimensions of cylindrical lithium battery grooves. Background Technology

[0002] During the production of cylindrical lithium batteries, a rolling mechanism is used to roll annular grooves on the battery casing wall to form grooves. These grooves are used to meet the requirements of subsequent process assembly. Especially in the subsequent sealing process, the quality of the seal depends on the end height dimension of the groove, which is the distance between the side wall of the groove near the opening end and the opening end. If the end height dimension of the groove deviates, the lithium battery is prone to leakage at both the sealing and the groove, resulting in the scrapping of the lithium battery. Therefore, it is necessary to inspect the dimensions of the groove to reduce the scrapping of lithium batteries.

[0003] The current method for inspecting the dimensions of roller grooves mainly involves manual sampling on the production line. This method has poor comprehensiveness, accuracy, and reliability. Summary of the Invention

[0004] This invention provides a device and method for measuring the groove size of cylindrical lithium batteries, which solves or improves the problems of poor measurement comprehensiveness, low accuracy and reliability in the existing manual sampling inspection of the groove size of cylindrical lithium batteries.

[0005] This invention provides a device for measuring the dimensions of a cylindrical lithium battery groove, comprising: a measuring platform, a loading mechanism, and a contour measuring instrument; the measuring platform is provided with a measuring position; the loading mechanism is used to transfer the cylindrical lithium battery after the grooving process is completed to the measuring position, and the bottom of the cylindrical lithium battery located at the measuring position is connected to the measuring platform; the contour measuring instrument is disposed on the measuring platform, and the detection end of the contour measuring instrument is used to extend into the open end of the cylindrical lithium battery, and the contour measuring instrument is used to measure the distance between the side wall of the groove near the open end and the open end.

[0006] According to the present invention, a cylindrical lithium battery groove size measuring device further includes: a groove inner diameter measuring device; the groove inner diameter measuring device is disposed close to the measuring position; the groove inner diameter measuring device includes: a first linear drive mechanism and a measuring probe; two measuring probes are provided, the two measuring probes are disposed opposite to each other, the axes of the two measuring probes coincide, the axes of the measuring probes are parallel to the measuring platform, and the axes of the measuring probes intersect the axis of the cylindrical lithium battery; the measuring probes are connected to the first linear drive mechanism, the first linear drive mechanism is used to drive the measuring probes to switch between a first position away from the groove and a second position close to the groove, in the first position, the measuring probes are separated from the bottom of the groove, and in the second position, the measuring probes are connected to the bottom of the groove.

[0007] According to the present invention, a cylindrical lithium battery groove size measuring device further includes: a positioning block and an elastic member; the positioning block has a blind hole, the bottom of the blind hole is connected to the measuring probe through the elastic member, and the measuring probe extends out of the blind hole; a first linear drive mechanism is connected to the positioning block; in the first position, the elastic member is in an initial state, and the side of the positioning block near the cylindrical lithium battery is separated from the shell wall of the cylindrical lithium battery; in the second position, the elastic member is in a deformed state, the side of the positioning block near the cylindrical lithium battery is connected to the shell wall of the cylindrical lithium battery, and the measuring probe abuts against the bottom of the groove.

[0008] According to the present invention, a cylindrical lithium battery groove size measuring device is provided, wherein the groove inner diameter measuring device further includes: a laser coaxial displacement meter; the laser coaxial displacement meter is disposed on the positioning block, and the laser coaxial displacement meter is used to detect the deformation of the elastic member when the measuring probe is in the second position; the laser coaxial displacement meter is used for communication connection with a terminal device.

[0009] According to the present invention, a cylindrical lithium battery groove size measuring device is provided, wherein the groove inner diameter measuring device further includes: a pressure sensor; the pressure sensor is disposed on the positioning block, and the pressure sensor is used to detect the elastic force generated by the elastic member when the measuring probe is in the second position; the pressure sensor is used for communication connection with a terminal device.

[0010] According to the present invention, a cylindrical lithium battery groove size measuring device further includes: a lifting drive mechanism and a distance sensor; the lifting drive mechanism is connected to the positioning block, and when the measuring probe is in the second position, the lifting drive mechanism is used to drive the positioning block to move towards the side closer to the measuring platform until the measuring probe is connected to the side wall of the groove near the bottom of the shell; the distance sensor is disposed on the positioning block, and the distance sensor is used to measure the distance between the measuring probe and the measuring platform; the distance sensor is used for communication connection with a terminal device.

[0011] According to the present invention, a cylindrical lithium battery grooving dimension measuring device is provided, wherein the feeding mechanism includes: a pusher block and a driving assembly; the pusher block is connected to the driving assembly, and the driving assembly is used to drive the pusher block to move in the X-axis, Y-axis or Z-axis; the pusher block is used to push the cylindrical lithium battery after the grooving process on the conveyor belt onto the measuring platform.

[0012] According to the present invention, a cylindrical lithium battery groove size measuring device further includes: a first clamping part, a second clamping part, and a second linear drive mechanism; the first clamping part and the second clamping part are arranged opposite to each other, the end face of the first clamping part near the second clamping part is provided with a plurality of first arc-shaped grooves, the end face of the second clamping part near the first clamping part is provided with a plurality of second arc-shaped grooves, the plurality of first arc-shaped grooves and the plurality of second arc-shaped grooves are arranged in a one-to-one correspondence, and a measuring position is formed between the first arc-shaped groove and the corresponding second arc-shaped groove; the second linear drive mechanism is used to drive the first clamping part and the second clamping part to move closer or further apart, and the cylindrical lithium battery is used to clamp between the first arc-shaped groove and the corresponding second arc-shaped groove.

[0013] The present invention also provides a method for measuring the cylindrical lithium battery groove size measuring device as described above, comprising:

[0014] The cylindrical lithium battery, after the grooving process is completed, is transferred to the measurement position of the measurement platform by the feeding mechanism.

[0015] The distance between the sidewall of the groove near the opening end and the opening end is measured using a profile measuring instrument.

[0016] The measurement method provided by the present invention further includes:

[0017] The measuring probe is driven to connect with the bottom of the groove by a first linear drive mechanism; the inner diameter of the groove is obtained based on the distance between the two relative measuring probes.

[0018] The measuring probe is driven to connect with the side wall of the groove near the bottom of the shell by a lifting drive mechanism; the distance between the side wall of the groove near the bottom of the shell and the bottom of the shell is obtained based on the distance between the measuring probe and the measuring platform.

[0019] This invention provides a device and method for measuring the grooving dimensions of cylindrical lithium batteries. By using a contour measuring instrument, after the grooving process is completed, the cylindrical lithium batteries are transferred to the measuring position via a feeding mechanism. The bottom of the cylindrical lithium battery shell contacts the measuring platform, meaning the cylindrical lithium batteries to be measured are all in a vertical position. The measuring platform provides stable support for the cylindrical lithium batteries. The distance between the sidewall of the grooving near the opening end and the opening end is the end height dimension of the grooving. The contour measuring instrument is activated, and its probe extends into the opening end, contacting the upper sidewall of the grooving. The extension of the probe from the opening end into the upper sidewall of the grooving is the end height dimension. The contour measuring instrument allows for batch measurement of the grooving dimensions after the grooving process is completed, enabling timely detection of cylindrical lithium batteries with unqualified end height dimensions. This prevents unqualified cylindrical lithium batteries from flowing to the next process, ensuring comprehensive measurement, improving measurement efficiency and accuracy, and ultimately reducing the defect rate of cylindrical lithium batteries. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the cylindrical lithium battery groove size measuring device provided by the present invention;

[0022] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0023] Figure 3 This is a flowchart illustrating the measurement method provided by the present invention;

[0024] Figure label:

[0025] 1: Measuring platform; 2: Feeding mechanism; 21: Push block; 22: Drive assembly; 221: X-axis cylinder; 222: Y-axis cylinder; 223: Z-axis cylinder; 3: Contour measuring instrument; 4: Cylindrical lithium battery; 41: Groove; 5: Groove inner diameter measuring device; 51: First linear drive mechanism; 52: Measuring probe; 53: Positioning block; 54: Elastic component; 55: Laser coaxial displacement meter; 6: Lifting drive mechanism; 7: Distance sensor; 8: Conveyor belt; 91: First clamping part; 92: Second clamping part; 93: Second linear drive mechanism. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0027] In the description of the embodiments of the present invention, it should be noted that the terms "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0029] The following is combined Figures 1 to 3 This invention describes a cylindrical lithium battery groove size measuring device and its measuring method.

[0030] After the grooving process is completed, an annular groove is formed on the outer wall of the cylindrical lithium battery, and the center of the groove is located on the axis of the cylindrical lithium battery.

[0031] like Figures 1 to 2As shown in the figure, the cylindrical lithium battery groove size measuring device shown in this embodiment includes: a measuring platform 1, a feeding mechanism 2, and a contour measuring instrument 3.

[0032] The measuring platform 1 is equipped with a measuring position; the feeding mechanism 2 is used to transfer the cylindrical lithium battery 4 after the grooving process is completed to the measuring position, and the bottom of the cylindrical lithium battery 4 located at the measuring position is connected to the measuring platform 1; the contour measuring instrument 3 is set on the measuring platform 1, and the detection end of the contour measuring instrument 3 is used to extend into the open end of the cylindrical lithium battery 4. The contour measuring instrument 3 is used to measure the distance between the side wall of the groove 41 near the open end and the open end.

[0033] Specifically, the cylindrical lithium battery grooving dimension measuring device shown in this embodiment, by setting a contour measuring instrument 3, after the cylindrical lithium battery 4 completes the grooving process, transfers the cylindrical lithium battery 4 to the measuring position through the feeding mechanism 2. The bottom of the cylindrical lithium battery 4 is in contact with the measuring platform 1, that is, the cylindrical lithium battery 4 to be measured is in a vertical state. The measuring platform 1 is used to stably support the cylindrical lithium battery 4. The distance between the side wall of the groove 41 near the opening end and the opening end is the end height dimension of the groove 41. The contour measurement is then activated. The probe of the contour measuring instrument 3 is used to extend into the open end and contact the upper side wall of the groove 41. The extension of the probe from the open end into the upper side wall of the groove 41 is the end height dimension. The contour measuring instrument 3 can perform batch measurement of the groove dimension after the groove process is completed, so as to promptly detect cylindrical lithium batteries with unqualified end height dimensions, prevent unqualified cylindrical lithium batteries from flowing to the next process, ensure the comprehensiveness of measurement, improve the efficiency and accuracy of measurement, and thus reduce the defect rate of cylindrical lithium batteries.

[0034] It should be noted that the contour measuring instrument 3 shown in this embodiment is a contact contour measuring instrument known in the art, and the specific model can be Zhongtu Instrument SJ5718, Zhongtu Instrument SJ5730 or Keyence LJ-X8000.

[0035] In some embodiments, such as Figure 1 and Figure 2As shown in the embodiment, the cylindrical lithium battery groove size measuring device further includes: a groove inner diameter measuring device 5; the groove inner diameter measuring device 5 is set close to the measuring position; the groove inner diameter measuring device 5 includes: a first linear drive mechanism 51 and a measuring probe 52; there are two measuring probes 52, the two measuring probes 52 are arranged opposite each other, the axes of the two measuring probes 52 coincide, the axes of the measuring probes 52 are parallel to the measuring platform 1, and the axes of the measuring probes 52 intersect with the axis of the cylindrical lithium battery 4; the measuring probes 52 are connected to the first linear drive mechanism 51, the first linear drive mechanism 51 is used to drive the measuring probes 52 to switch between a first position away from the groove 41 and a second position close to the groove 41, when the measuring probes 52 are in the first position, the measuring probes 52 are separated from the bottom of the groove 41, when the measuring probes 52 are in the second position, the measuring probes 52 are connected to the bottom of the groove 41.

[0036] Specifically, after the cylindrical lithium battery 4 is placed on the measuring position, the first linear drive mechanism 51 drives the two measuring probes 52 to approach each other until the two measuring probes 52 contact the bottom of the groove 41. Since the axes of the two measuring probes 52 intersect the axis of the cylindrical lithium battery 4, the distance between the two measuring probes 52 is the inner diameter of the groove 41. The measurement process is similar to the measurement of a vernier caliper.

[0037] The distance between the two measuring probes 52 can be obtained by setting a distance sensor on the measuring platform 1, and obtaining the distance between the two measuring probes 52 through the distance sensor, thereby obtaining the inner diameter of the groove 41; the first linear drive mechanism 51 can be a hydraulic cylinder or a pneumatic cylinder.

[0038] In some embodiments, such as Figure 2 As shown, the groove inner diameter measuring device 5 in this embodiment further includes: a positioning block 53 and an elastic member 54; a blind hole is provided on the positioning block 53, and the bottom of the blind hole is connected to the measuring probe 52 through the elastic member 54, with the measuring probe 52 extending out of the blind hole; a first linear drive mechanism 51 is connected to the positioning block 53; when the measuring probe 52 is in the first position, the elastic member 54 is in the initial state, and the side of the positioning block 53 near the cylindrical lithium battery 4 is separated from the shell wall of the cylindrical lithium battery 4; when the measuring probe 52 is in the second position, the elastic member 54 is in a deformed state, and the side of the positioning block 53 near the cylindrical lithium battery 4 is connected to the shell wall of the cylindrical lithium battery 4, with the measuring probe 52 abutting against the bottom of the groove 41.

[0039] Specifically, two positioning blocks 53 are provided, and the two positioning blocks 53 are arranged opposite to each other. When the first linear drive mechanism 51 drives the two positioning blocks 53 to move closer, the measuring probe 52 extends out of the blind hole and will first contact the bottom of the groove 41. At this time, the first linear drive mechanism 51 continues to drive the two positioning blocks 53 to move closer, thereby compressing the elastic member 54. Under the elastic force of the elastic member 54, the measuring probe 52 stably abuts against the bottom of the groove 41 until the two positioning blocks 53 contact the shell wall of the cylindrical lithium battery 4. At this time, the first linear drive mechanism 51 closes. By setting the elastic member 54 between the positioning block 53 and the measuring probe 52, a buffering effect can be achieved, reducing the impact between the measuring probe 52 and the bottom of the groove 41, and effectively avoiding damage to the measuring probe 52.

[0040] Among them, the elastic member 54 can be a spring.

[0041] In some embodiments, such as Figure 1 As shown, the positioning block 53 in this embodiment is provided with an arc-shaped groove, which is used to adapt to the shell wall of the cylindrical lithium battery 4, thereby ensuring the stability of the contact between the positioning block 53 and the cylindrical lithium battery 4.

[0042] In some embodiments, such as Figure 2 As shown, the groove inner diameter measuring device 5 shown in this embodiment further includes: a laser coaxial displacement meter 55; the laser coaxial displacement meter 55 is disposed on the positioning block 53, and the laser coaxial displacement meter 55 is used to detect the deformation of the elastic member 54 when the measuring probe 52 is in the second position; the laser coaxial displacement meter 55 is used for communication connection with the terminal device.

[0043] Specifically, the inner diameter of the groove 41 can be indirectly calculated using the deformation of the elastic member 54. The specific calculation method is as follows: Figure 2 Taking the measuring probe 52 on the left as an example, when the measuring probe 52 is not in contact with the bottom of the groove 41, the elastic member 54 is in its initial state, and the length L of the measuring probe 52 extending out of the blind hole is known. After the measuring probe 52 contacts the bottom of the groove 41, the positioning block 53 continues to move toward the cylindrical lithium battery 4 until it contacts the shell wall of the cylindrical lithium battery 4. During this process, the compression of the elastic member 54 is x, and the compression x is the deformation of the elastic member 54. Then the depth h of the groove 41 is h = Lx. The outer diameter R of the cylindrical lithium battery 4 is known, and the inner diameter r of the groove is r = R - 2h. The deformation of the elastic member 54 is measured by the laser coaxial displacement meter 55 and the deformation is input to the terminal device. The terminal device can then indirectly calculate the inner diameter of the groove 41 through the deformation.

[0044] The terminal device can be a desktop computer, laptop computer, smartphone, or tablet computer, etc.

[0045] In some embodiments, the groove inner diameter measuring device 5 shown in this embodiment further includes: a pressure sensor; the pressure sensor is disposed on the positioning block 53, and the pressure sensor is used to detect the elastic force generated by the elastic member 54 when the measuring probe 52 is in the second position; the pressure sensor is used to communicate with the terminal device.

[0046] Specifically, as mentioned above, the inner diameter of the groove can be indirectly calculated using the deformation of the elastic member 54. The deformation of the elastic member 54 is positively correlated with the elastic force. According to Hooke's theorem, the deformation can be obtained by measuring the elastic force, and then the inner diameter of the groove 41 can be calculated based on the deformation. The specific calculation method is as described above.

[0047] In some embodiments, such as Figure 2 As shown in the figure, the cylindrical lithium battery groove size measuring device in this embodiment further includes: a lifting drive mechanism 6 and a distance sensor 7; the lifting drive mechanism 6 is connected to the positioning block 53, and when the measuring probe 52 is in the second position, the lifting drive mechanism 6 is used to drive the positioning block 53 to move toward the side closer to the measuring platform 1 until the measuring probe 52 is connected to the side wall of the groove 41 near the bottom of the shell; the distance sensor 7 is disposed on the positioning block 53, and the distance sensor 7 is used to measure the distance between the measuring probe 52 and the measuring platform 1; the distance sensor 7 is used for communication connection with the terminal device.

[0048] Specifically, after measuring the inner diameter of the groove 41, the lifting drive mechanism 6 drives the positioning block 53 to descend, and the measuring probe 52 on the positioning block 53 also descends synchronously until the measuring probe 52 contacts the lower sidewall of the groove 41. The distance between the lower sidewall of the groove 41 and the bottom of the shell is the bottom height of the groove 41. Since the bottom of the shell is in contact with the measuring platform 1, the upper end face of the measuring platform 1 is coplanar with the bottom of the shell. The measuring platform 1 serves as the measuring reference. The bottom height of the groove 41 can be obtained by measuring the distance between the measuring platform 1 and the measuring probe 52 through the distance sensor 7.

[0049] The lifting drive mechanism 6 can be a hydraulic cylinder or a pneumatic cylinder.

[0050] In some embodiments, such as Figure 1 As shown, the feeding mechanism in this embodiment includes: a pusher block and a drive assembly; the pusher block 21 is connected to the drive assembly 22, and the drive assembly 22 is used to drive the pusher block 21 to move in the X-axis, Y-axis or Z-axis; the pusher block 21 is used to push the cylindrical lithium battery after the grooving process on the conveyor belt 8 onto the measuring platform 1.

[0051] Specifically, the drive assembly 22 includes an X-axis cylinder 221, a Y-axis cylinder 222, and a Z-axis cylinder 223. The telescopic end of the Z-axis cylinder 223 is connected to the Y-axis cylinder 222, the telescopic end of the Y-axis cylinder 222 is connected to the X-axis cylinder 221, and the telescopic end of the X-axis cylinder 221 is connected to the lever 21. The movement of the X-axis cylinder 221, the Y-axis cylinder 222, and the Z-axis cylinder 223 can drive the lever 21 to move in three-dimensional space, thereby adjusting the lever 21 to a suitable position so that the lever 21 can push the cylindrical lithium battery on the conveyor belt 8 onto the measuring platform 1.

[0052] In some embodiments, such as Figure 1 As shown in the figure, the cylindrical lithium battery groove size measuring device in this embodiment further includes: a first clamping part 91, a second clamping part 92, and a second linear drive mechanism 93; the first clamping part 91 and the second clamping part 92 are arranged opposite to each other, and a plurality of first arc-shaped grooves are recessed on the end face of the first clamping part 91 near the second clamping part 92, and a plurality of second arc-shaped grooves are recessed on the end face of the second clamping part 92 near the first clamping part 91. The plurality of first arc-shaped grooves and the plurality of second arc-shaped grooves are arranged one-to-one, and a measuring position is formed between the first arc-shaped grooves and the second arc-shaped grooves; the second linear drive mechanism 93 is used to drive the first clamping part 91 and the second clamping part 92 to move closer or further apart, and the cylindrical lithium battery 4 is used to be clamped between the first arc-shaped grooves and the corresponding second arc-shaped grooves. The first arc-shaped grooves and the second arc-shaped grooves are adapted to the shell wall of the cylindrical lithium battery.

[0053] Specifically, after the pusher block 21 pushes the cylindrical lithium battery onto the measuring platform 1, the cylindrical lithium battery 4 is located between the first clamping part 91 and the second clamping part 92. The second linear drive mechanism 93 drives the first clamping part 91 and the second clamping part 92 to move closer together. There is a certain misalignment between the cylindrical lithium battery 4 and the first arc-shaped groove. As the first clamping part 91 and the second clamping part 92 gradually move closer together, the cylindrical lithium battery 4 can adaptively slide between the first arc-shaped groove and the second arc-shaped groove, thereby achieving stable clamping of the cylindrical lithium battery 4 by the first clamping part 91 and the second clamping part 92, thus ensuring the accuracy of the groove size measurement.

[0054] The second linear drive mechanism 93 can be a hydraulic cylinder or a pneumatic cylinder.

[0055] In some embodiments, such as Figure 1 As shown, the depth of the first arc-shaped groove and the depth of the second arc-shaped groove in this embodiment are less than the radius of the cylindrical lithium battery 4, so that when the first clamping part 91 and the second clamping part 92 approach each other, the cylindrical lithium battery 4 can slide more easily between the first arc-shaped groove and the second arc-shaped groove, avoiding the phenomenon of the cylindrical lithium battery 4 being pinched.

[0056] Furthermore, when the pusher block 21 pushes the cylindrical lithium battery onto the measuring platform 1, the distance between the first clamping part 91 and the second clamping part 92 can be adjusted to be slightly larger than the diameter of the cylindrical lithium battery 4. The pusher block moves the cylindrical lithium battery 4 between the first clamping part 91 and the second clamping part 92. The first clamping part 91 and the second clamping part 92 can guide the cylindrical lithium battery 4, so that the cylindrical lithium batteries 4 on the measuring platform 1 are arranged in a roughly straight line, thereby facilitating the clamping of the cylindrical lithium battery by the first clamping part 91 and the second clamping part 92.

[0057] like Figure 3 As shown, the present invention also provides a measurement method for the cylindrical lithium battery groove size measuring device as described above, including steps 310 and 320. The measurement method described below and the cylindrical lithium battery groove size measuring device described above can be referred to in correspondence with each other.

[0058] Step 310: The cylindrical lithium battery after the grooving process is completed is transferred to the measuring position of the measuring platform by the feeding mechanism, so that the cylindrical lithium battery is placed vertically on the measuring platform.

[0059] Step 320: Measure the distance between the sidewall of the groove near the opening end and the opening end using a profile measuring instrument to obtain the end height dimension of the groove.

[0060] Before step 320, there is also step 311, in which after the cylindrical lithium battery is transferred to the measuring platform, the first clamping part is driven to approach the second clamping part by the second linear drive mechanism, so that the cylindrical lithium battery can be stably clamped on the measuring platform.

[0061] Steps 330 and 340 are included after step 320.

[0062] Step 330: Drive the measuring probe to connect with the bottom of the trough through the first linear drive mechanism; obtain the inner diameter of the trough based on the distance between the two relative measuring probes.

[0063] Specifically, as mentioned above, the distance between the two measuring probes can be measured directly or indirectly. The methods for direct and indirect measurement are as described above and will not be repeated here.

[0064] Step 340: Drive the measuring probe to connect with the side wall of the groove near the bottom of the shell through the lifting drive mechanism; based on the distance between the measuring probe and the measuring platform, the distance between the side wall of the groove near the bottom shell and the bottom of the shell is obtained, and the bottom height dimension of the groove can be obtained.

[0065] Using the cylindrical lithium battery grooving dimension measuring device provided in this embodiment, the grooving dimensions after the grooving process is completed can be measured in batches. The end height, inner diameter, and bottom height of the grooving can be measured separately, thereby enabling timely detection of cylindrical lithium batteries with unqualified grooving dimensions. This prevents unqualified cylindrical lithium batteries from flowing to the next process, ensuring the comprehensiveness of the measurement, improving the efficiency and accuracy of the measurement, and thus reducing the defect rate of cylindrical lithium batteries.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for measuring the dimensions of a cylindrical lithium battery groove, characterized in that, include: A measurement platform, wherein the measurement platform is equipped with measurement positions; The feeding mechanism is used to transfer the cylindrical lithium battery after the grooving process to the measuring position, and the bottom of the cylindrical lithium battery located at the measuring position is connected to the measuring platform. A profile measuring instrument is mounted on the measuring platform. The detection end of the profile measuring instrument is used to extend into the open end of the cylindrical lithium battery. The profile measuring instrument is used to measure the distance between the side wall of the groove near the open end and the open end. Groove inner diameter measuring device; The groove inner diameter measuring device is positioned close to the measuring position. The groove inner diameter measuring device includes: a first linear drive mechanism, a measuring probe, a positioning block, and an elastic component; The measurement probe is provided in two positions, which are arranged opposite each other and have coincident axes. The axes of the measurement probes are parallel to the measurement platform and intersect with the axis of the cylindrical lithium battery. The measurement probe is connected to the first linear drive mechanism, which drives the measurement probe to switch between a first position away from the trough and a second position close to the trough. In the first position, the measurement probe is separated from the bottom of the trough, and in the second position, the measurement probe is connected to the bottom of the trough. The positioning block has a blind hole, the bottom of which is connected to the measuring probe via the elastic member, and the measuring probe extends out of the blind hole; the first linear drive mechanism is connected to the positioning block; In the first position, the elastic member is in its initial state, and the side of the positioning block near the cylindrical lithium battery is separated from the shell wall of the cylindrical lithium battery; in the second position, the elastic member is in a deformed state, and the side of the positioning block near the cylindrical lithium battery is connected to the shell wall of the cylindrical lithium battery, and the measuring probe abuts against the bottom of the groove. The positioning block has an arc-shaped groove on the side facing the cylindrical lithium battery, and the arc-shaped groove is used to fit the shell wall of the cylindrical lithium battery. The cylindrical lithium battery groove size measuring device further includes: a lifting drive mechanism and a distance sensor; The lifting drive mechanism is connected to the positioning block. When the measuring probe is in the second position, the lifting drive mechanism drives the positioning block to move toward the side closer to the measuring platform until the measuring probe is connected to the side wall of the groove near the bottom of the shell. The distance sensor is located on the positioning block and is used to measure the distance between the measuring probe and the measuring platform. The distance sensor is used to communicate with the terminal device.

2. The cylindrical lithium battery groove size measuring device according to claim 1, characterized in that, The groove inner diameter measuring device also includes: a laser coaxial displacement meter; The laser coaxial displacement meter is mounted on the positioning block and is used to detect the deformation of the elastic member when the measuring probe is in the second position; the laser coaxial displacement meter is used for communication connection with the terminal device.

3. The cylindrical lithium battery groove size measuring device according to claim 1, characterized in that, The groove inner diameter measuring device also includes: a pressure sensor; The pressure sensor is mounted on the positioning block and is used to detect the elastic force generated by the elastic member when the measuring probe is in the second position; the pressure sensor is used for communication connection with the terminal device.

4. The cylindrical lithium battery groove size measuring device according to claim 1, characterized in that, The feeding mechanism includes: a pusher block and a drive assembly; The push block is connected to the drive assembly, which drives the push block to move along the X-axis, Y-axis, or Z-axis. The push block is used to push the cylindrical lithium battery, which has undergone the grooving process on the conveyor belt, onto the measuring platform.

5. The cylindrical lithium battery groove size measuring device according to claim 1, characterized in that, The cylindrical lithium battery groove size measuring device further includes: a first clamping part, a second clamping part, and a second linear drive mechanism; The first clamping part and the second clamping part are arranged opposite to each other. The end face of the first clamping part near the second clamping part is provided with a plurality of first arc-shaped grooves. The end face of the second clamping part near the first clamping part is provided with a plurality of second arc-shaped grooves. The plurality of first arc-shaped grooves and the plurality of second arc-shaped grooves are arranged in a one-to-one correspondence. A measurement position is formed between the first arc-shaped groove and the corresponding second arc-shaped groove. The second linear drive mechanism is used to drive the first clamping part to move closer to or further away from the second clamping part, and the cylindrical lithium battery is used to clamp between the first arc-shaped groove and the corresponding second arc-shaped groove.

6. A method for measuring the dimensions of a cylindrical lithium battery groove as described in any one of claims 1 to 5, characterized in that, include: The cylindrical lithium battery, after the grooving process is completed, is transferred to the measurement position of the measurement platform by the feeding mechanism. The distance between the sidewall of the groove near the opening end and the opening end is measured using a profile measuring instrument. The measuring probe is driven to connect with the bottom of the groove by a first linear drive mechanism; The inner diameter of the groove is obtained based on the distance between the two relative measuring probes. The measuring probe is driven to connect with the side wall of the groove near the bottom of the shell by a lifting drive mechanism; the distance between the side wall of the groove near the bottom of the shell and the bottom of the shell is obtained based on the distance between the measuring probe and the measuring platform.

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