Portable roll gap optical measuring instrument, pole piece rolling mill and roll gap optical measuring method

Abstract

The invention provides a portable roll gap optical measuring instrument, a pole piece rolling mill and a roll gap optical measuring method. The portable roll gap optical measuring instrument comprises a light emitter and a light receiver. The light emitting surface of the light emitter faces a gap between two pressing rollers of the pole piece rolling device and extends in the length direction of the gap between the two pressing rollers of the pole piece rolling device; the receiver is positioned on one side, far away from the light emitter, of two compression rollers of the pole piece rolling device; the receiving surface of the receiver faces a gap between two compression rollers of the pole piece rolling device and is opposite to the light emitting surface of the light emitter; scale marks are arranged on the receiving face of the receiver, the size of a gap between the two pressing rollers of the pole piece rolling device can be obtained more quickly by measuring the width of diffraction fringes through the scale marks on the receiving face of the receiver, and when the pole piece rolling device is adjusted, the size of the gap between the two pressing rollers of the pole piece rolling device can be obtained in real time, and the size of the gap between the two pressing rollers of the pole piece rolling device can be obtained more quickly. And the waste of the pole piece material belt sample can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pole piece rolling equipment, and in particular to a portable roll gap optical measuring instrument, a pole piece rolling mill and a roll gap optical measuring method. Background Art

[0002] In the process of battery pole piece production, in order to ensure uniform distribution of active materials coated on the pole piece strip, the industry usually uses a pole piece rolling device to roll the pole piece strip. However, since the pole pieces of different battery models often have different thicknesses, the gap between the rollers of the pole piece rolling device needs to be pre-adjusted before formal production.

[0003] At present, before formal production, people usually roll the pole piece strip sample through a pole piece rolling device, and then measure the thickness of the pole piece strip sample after rolling, so as to indirectly obtain the size of the gap between the two rollers of the pole piece rolling device. This requires that after each adjustment of the rollers of the pole piece rolling device, the pole piece strip sample needs to be tested, which not only affects the adjustment efficiency of the pole piece rolling device, but also requires wasting a large number of pole piece strip samples. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a portable roller gap optical measuring instrument, a pole piece rolling mill and a roller gap optical measuring method with high detection efficiency and less pole piece material waste.

[0005] The purpose of this disclosure is achieved through the following technical solutions:

[0006] A portable roller gap optical measuring instrument, comprising:

[0007] A light emitter, the light emitter is used to be detachably mounted on the pole piece rolling device, the light emitting surface of the light emitter is used to be arranged toward the gap between the two pressing rollers of the pole piece rolling device, and the light emitting surface of the light emitter extends along the length direction of the gap between the two pressing rollers of the pole piece rolling device; and

[0008] A receiver, the receiver is used to be detachably mounted on a pole piece rolling device, and is located on a side of the two rollers of the pole piece rolling device away from the light emitter; the receiving surface of the receiver faces the gap between the two rollers of the pole piece rolling device, and is arranged opposite to the light emitting surface of the light emitter; the light emitted by the light emitting surface of the light emitter is projected to the receiver through the gap between the two rollers of the pole piece rolling device, and forms diffraction stripes on the receiving surface of the receiver; the receiving surface of the receiver is provided with scale lines, and the scale lines are used to measure the width of the diffraction stripes.

[0009] In one of the embodiments, two ends of the light emitter are respectively used to be magnetically connected to the frame of the pole piece rolling device.

[0010] In one embodiment, the light emitter includes a magnetic base, a lampshade and a light strip; the magnetic base is used to be magnetically connected to the frame of the pole piece rolling device, and the end of the lampshade is lifted and installed on the magnetic base; the light strip is arranged in the lampshade and faces the gap between the two rollers of the pole piece rolling device.

[0011] In one of the embodiments, a lifting guide groove is provided on the magnetic base, and a slider is protruded from the end of the lampshade into the lifting guide groove; a fine-tuning screw is installed on the magnetic base; a part of the fine-tuning screw is rotatably arranged in the lifting guide groove and is threadedly engaged with the screw hole of the slider.

[0012] In one embodiment, the receiver includes a magnetic platform and a receiving screen; the magnetic platform is magnetically connected to the frame of the pole piece rolling device; the receiving screen is lifted and installed on the magnetic platform, and is arranged opposite to the gap between the two pressure rollers of the pole piece rolling device.

[0013] In one of the embodiments, a lifting screw is provided on the magnetic platform, the thread of the lifting screw is matched with the screw hole of the magnetic platform, and the receiving screen is fixedly arranged on the lifting screw.

[0014] In one of the embodiments, a light-shielding border is provided at the edge of the receiving screen; the light-shielding border surrounds the side of the receiving screen facing the gap between the two pressing rollers of the pole piece rolling device.

[0015] In one embodiment, the receiver also includes an observation dark box; the observation dark box is lifted and installed on the magnetic suction platform and is located on the side of the receiving screen away from the gap between the two pressure rollers of the pole piece rolling device; a light-shielding port and a lookout port are provided on the observation dark box; the receiving screen is a light-transmitting screen, the light-shielding port is pressed against the edge of the receiving screen, and the lookout port is arranged opposite to the scale line.

[0016] A pole piece rolling mill comprises a pole piece rolling device and a portable roller gap optical measuring instrument of any of the above-mentioned embodiments, wherein the light transmitter and the receiver can be detachably mounted on the pole piece rolling device, and the light emitting surface of the light transmitter is arranged toward the gap between the two rollers of the pole piece rolling device; the receiving surface of the receiver is arranged toward the gap between the two rollers of the pole piece rolling device and is arranged opposite to the light emitting surface of the light transmitter.

[0017] A roll gap optical measurement method, performed using the portable roll gap optical measurement instrument of any of the above embodiments, comprises the following steps:

[0018] According to the diffraction fringes formed on the receiving surface of the receiver, a current diffraction fringes width is obtained;

[0019] Comparing whether the current diffraction fringe width is greater than or equal to a preset diffraction fringe width;

[0020] When the current diffraction fringe width is greater than or equal to the preset diffraction fringe width, adjusting the positions of the two pressing rollers of the pole piece rolling device so that the two pressing rollers are close to each other;

[0021] When the current diffraction fringe width is smaller than the preset diffraction fringe width, adjusting the positions of the two pressing rollers of the pole piece rolling device so that the two pressing rollers are away from each other;

[0022] The preset diffraction fringe width and the thickness of the battery pole piece rolled out by the pole piece rolling device satisfy the following relationship:

[0023] W=kλ(S / T)

[0024] Among them, T is the thickness of the battery pole piece rolled out by the pole piece rolling device, k is the conversion coefficient, λ is the wavelength of the light emitted by the light-emitting surface of the light emitter, S is the distance between the light emitter and the receiver, and W is the preset diffraction stripe width.

[0025] Compared with the prior art, the present invention has at least the following advantages:

[0026] 1) Since the receiving surface of the receiver faces the gap between the two rollers of the pole piece rolling device and is arranged opposite to the light-emitting surface of the light transmitter, the light emitted from the light-emitting surface of the light transmitter can pass through the gap between the two rollers of the pole piece rolling device and be projected onto the receiving surface of the receiver. Since the thickness of the battery pole piece is usually between 0.03 mm and 2 mm, the gap between the two rollers of the rolling device also mainly varies between 0.03 mm and 2 mm. At this time, the light emitted from the light-emitting surface of the light transmitter will be diffracted after passing through the gap between the two rollers of the rolling device, thereby forming diffraction stripes on the receiving surface of the receiver. In this way, the width of the diffraction stripes can be measured by the scale lines on the receiving surface of the receiver to obtain the size of the gap between the two rollers of the pole piece rolling device.

[0027] 2) Compared with the prior art, the above-mentioned portable roller gap optical meter can be detachably installed on the pole piece rolling device. By measuring the width of the diffraction stripes through the scale lines on the receiving surface of the receiver, the size of the gap between the two rollers of the pole piece rolling device can be obtained more quickly. When the pole piece rolling device is adjusted, not only can the size of the gap between the two rollers of the pole piece rolling device be obtained in real time through the scale lines so that it can be quickly adjusted to the preset width, but there is also no need to use small samples of the pole piece strip for repeated testing, thereby reducing the waste of small samples of the pole piece strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 An exploded view of a pole piece rolling mill according to an embodiment of the present disclosure;

[0030] Figure 2 for Figure 1 A cross-sectional view of a pole piece rolling mill is shown;

[0031] Figure 3 A partial cross-sectional view of a light emitter of a pole piece rolling mill according to another embodiment of the present disclosure;

[0032] Figure 4 A partial cross-sectional view of a receiver of a pole piece rolling mill according to another embodiment of the present disclosure;

[0033] Figure 5 A partial cross-sectional view of a receiver of a pole piece rolling mill according to another embodiment of the present disclosure;

[0034] Figure 6 for Figure 5 A partial enlarged view shown in the middle A;

[0035] Figure 7 The present invention is a flow chart of a roll gap optical measurement method according to another embodiment of the present invention.

[0036] Reference numerals: 10, pole piece rolling mill; 100, portable roll gap optical measuring instrument; 110, light transmitter; 1110, magnetic seat; 1111, lifting guide groove; 1120, lampshade; 1121, slider; 1122, arc-shaped reflecting surface; 1123, convex lens; 1130, light belt; 1140, fine-tuning screw; 120, receiver; 1210, magnetic suction platform; 1220, receiving screen; 1221, scale line; 1222, shading edge; 1230, observation dark box; 1231, shading port; 1232, lookout port; 1233, tooth pattern structure; 1234, push Feed block; 1206, threaded hole; 1235, guide block; 1207, guide hole; 1236, swing push rod; 1208, handle; 1240, lifting screw; 1250, magnifying observation mechanism; 1251, mounting slide; 1202, gear; 1203, drum-shaped swing cavity; 1204, push-swing groove; 1252, magnifying lens; 1205, swing projection; 1253, push-pull drive rod; 1201, handle; 1260, narrow-band filter; 200, pole piece rolling device; 210, frame; 220, pressure roller; 2210, gap; 230, cantilever control box. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0041] like Figure 1 and Figure 2 As shown, a portable roller gap optical measuring instrument 100 of an embodiment includes a light transmitter 110 and a receiver 120; the light transmitter 110 is used to be detachably mounted on the pole piece rolling device 200, and the light emitting surface of the light transmitter 110 is used to be arranged toward the gap 2210 between the two rollers 220 of the pole piece rolling device 200, and the light emitting surface of the light transmitter 110 extends along the length direction of the gap 2210 between the two rollers 220 of the pole piece rolling device 200; the receiver 120 is used to be detachably mounted on the pole piece rolling device 200, and is located at the pole piece rolling device 200. The two pressure rollers 220 are away from one side of the light emitter 110; the receiving surface of the receiver 120 faces the gap 2210 between the two pressure rollers 220 of the pole piece rolling device 200, and is arranged opposite to the light-emitting surface of the light emitter 110; the light emitted from the light-emitting surface of the light emitter 110 is projected to the receiver 120 through the gap 2210 between the two pressure rollers 220 of the pole piece rolling device 200, and forms diffraction stripes on the receiving surface of the receiver 120; the receiving surface of the receiver 120 is provided with scale lines 1221, and the scale lines 1221 are used to measure the width of the diffraction stripes.

[0042] It can be understood that since the receiving surface of the receiver 120 faces the gap 2210 between the two rollers 220 of the pole piece rolling device 200 and is arranged opposite to the light-emitting surface of the light emitter 110, the light emitted from the light-emitting surface of the light emitter 110 can pass through the gap 2210 between the two rollers 220 of the pole piece rolling device 200 and be projected onto the receiving surface of the receiver 120. Since the thickness of the battery pole piece is usually between 0.03 mm and 2 mm, the gap 2210 between the two rollers 220 of the rolling device also mainly varies between 0.03 mm and 2 mm. At this time, the light emitted from the light-emitting surface of the light emitter 110 will diffract after passing through the gap 2210 between the two rollers 220 of the rolling device, thereby forming diffraction stripes on the receiving surface of the receiver 120. In this way, the width of the diffraction stripes can be measured by the scale lines 1221 on the receiving surface of the receiver 120, thereby obtaining the size of the gap 2210 between the two rollers 220 of the pole piece rolling device 200.

[0043] It can be understood that, compared with the prior art, the portable roller gap optical meter 100 can be detachably mounted on the pole piece rolling device 200, and the width of the diffraction stripes can be measured by the scale lines 1221 on the receiving surface of the receiver 120 to more quickly obtain the size of the gap 2210 between the two rollers 220 of the pole piece rolling device 200. When the pole piece rolling device 200 is adjusted, not only can the size of the gap 2210 between the two rollers 220 of the pole piece rolling device 200 be obtained in real time through the scale lines 1221, so that it can be quickly adjusted to the preset width, but also there is no need to use the pole piece strip sample for repeated testing, thereby reducing the waste of the pole piece strip sample. Among them, the diffraction strip width can be selected as the central bright strip width, that is, the distance between the two first-level dark stripes, which can be more convenient for users to observe.

[0044] Combination Figure 2 As shown, in one embodiment, the two ends of the light emitter 110 are respectively used for magnetic connection to the frame 210 of the pole piece rolling device 200. It can be understood that since the two ends of the light emitter 110 are respectively magnetically connected to the frame 210 of the pole piece rolling device 200, the two ends of the light emitter 110 can be firmly fixed to the frame 210 of the pole piece rolling device 200 by magnetic force before formal production, and when the size of the gap 2210 between the two rollers 220 of the pole piece rolling device 200 is adjusted, the light emitter 110 can be quickly removed from the frame 210 of the pole piece rolling device 200, so as not to affect the normal use of the pole piece rolling device 200.

[0045] Combination Figure 2 and Figure 3 As shown, in this embodiment, the light emitter 110 includes a magnetic base 1110, a lampshade 1120 and a light strip 1130; the magnetic base 1110 is used to be magnetically connected to the frame 210 of the pole piece rolling device 200, and the end of the lampshade 1120 is lifted and installed on the magnetic base 1110; the light strip 1130 is arranged in the lampshade 1120 and faces the gap 2210 between the two pressure rollers 220 of the pole piece rolling device 200. It can be understood that by arranging the light strip 1130 in the lampshade 1120, the light emitted by the light strip 1130 can be projected more toward the gap 2210 between the two rollers 220 of the pole piece rolling device 200, and by lifting and installing the end of the lampshade 1120 on the magnetic base 1110, when the magnetic base 1110 is magnetically fixed on the frame 210 of the pole piece rolling device 200, the lampshade 1120 can be adjusted to move up and down relative to the magnetic base 1110, so that the light strip 1130 can be further aligned with the gap 2210 between the two rollers 220 of the pole piece rolling device 200. Figure 3As shown, specifically, the side of the lampshade 1120 facing the pole piece rolling device 200 is an arc-shaped reflecting surface 1122, and the light strip 1130 is arranged in the middle of the arc-shaped reflecting surface 1122, so that the light projected toward the surrounding side by the light strip 1130 can be reflected by the arc-shaped reflecting surface 1122 to the gap 2210 between the two pressure rollers 220 facing the pole piece rolling device 200.

[0046] Combination Figure 3 As shown, in another embodiment, a convex lens 1123 is embedded in the lampshade 1120 at a position away from the arc-shaped reflecting surface 1122, and the light strip 1130 is located at the focus of the convex lens 1123, so that the convex lens 1123 can refract the light emitted by the light strip 1130 into parallel light. The parallel light passes through the gap 2210 between the two rollers 220 of the pole piece rolling device 200 and can form more regular diffraction stripes on the receiving surface of the receiver 120, which is more convenient for observation.

[0047] Combination Figure 3 As shown, further, a lifting guide groove 1111 is provided on the magnetic base 1110, and a slider 1121 is protruded into the lifting guide groove 1111 at the end of the lampshade 1120; a fine-tuning screw 1140 is installed on the magnetic base 1110; the fine-tuning screw 1140 is partially rotatably arranged in the lifting guide groove 1111 and is threadedly matched with the screw hole of the slider 1121. It can be understood that because the fine-tuning screw 1140 is partially rotatably arranged in the lifting guide groove 1111 and is threadedly matched with the screw hole of the slider 1121, the user can slightly twist the fine-tuning screw 1140 to make the slider 1121 slide along the lifting guide groove 1111 under the drive of the fine-tuning screw 1140, and the lampshade 1120 and the light strip 1130 can be accurately adjusted within a shorter stroke.

[0048] Combination Figure 2As shown, in one embodiment, the receiver 120 includes a magnetic platform 1210 and a receiving screen 1220; the magnetic platform 1210 is magnetically connected to the frame 210 of the pole piece rolling device 200; the receiving screen 1220 is lifted and installed on the magnetic platform 1210, and is arranged opposite to the gap 2210 between the two pressure rollers 220 of the pole piece rolling device 200. It can be understood that since the magnetic suction platform 1210 is magnetically connected to the frame 210 of the pole piece rolling device 200, before formal production, the magnetic suction platform 1210 can be firmly fixed to the frame 210 of the pole piece rolling device 200 by magnetic force, so that the receiving screen 1220 can be carried by the magnetic suction platform 1210. When the size of the gap 2210 between the two pressure rollers 220 of the pole piece rolling device 200 is adjusted, the magnetic suction platform 1210 and the receiving screen 1220 can be quickly removed from the pole piece rolling device 200 together, thereby not affecting the normal use of the pole piece rolling device 200. At the same time, the receiving screen 1220 is installed in a lifting manner on the magnetic platform 1210. When the magnetic platform 1210 is magnetically fixed on the frame 210 of the pole piece rolling device 200, the receiving screen 1220 can be adjusted to move up and down relative to the magnetic platform 1210, so that the receiving screen 1220 can be further aligned with the gap 2210 between the two pressure rollers 220 of the pole piece rolling device 200, and the width of the diffraction stripes can be measured more accurately.

[0049] Combination Figure 4 As shown, in this embodiment, a lifting screw 1240 is provided on the magnetic platform 1210, and the lifting screw 1240 is threadedly matched with the screw hole of the magnetic platform 1210, and the receiving screen 1220 is fixedly arranged on the lifting screw 1240. It can be understood that because the lifting screw 1240 is threadedly matched with the screw hole of the magnetic platform 1210, and the receiving screen 1220 is fixedly arranged on the lifting screw 1240, the user can slightly twist the fine-tuning screw 1140 to make the receiving screen 1220 rise and fall on the magnetic platform 1210 on the fine-tuning screw 1140, and can achieve precise adjustment of the receiving screen 1220 within a shorter stroke.

[0050] Combination Figure 2 and Figure 4 As shown, further, a light shielding edge 1222 is provided at the edge of the receiving screen 1220; the light shielding edge 1222 surrounds the receiving screen 1220 on one side of the gap 2210 between the two pressing rollers 220 of the pole piece rolling device 200. It can be understood that since the light shielding edge 1222 surrounds the receiving screen 1220 on one side of the gap 2210 between the two pressing rollers 220 of the pole piece rolling device 200, the light shielding edge 1222 can block the interference of the ambient light on the diffraction fringes on the receiving screen 1220, so that the width of the diffraction fringes can be measured more accurately.

[0051] Usually, since the gap 2210 between the two pressing rollers 220 of the rolling device is mainly in the range of 0.03 mm to 2 mm, the width of the diffraction stripes formed on the receiving surface of the receiver 120 will also be very small.

[0052] Combination Figure 4 As shown, in order to make the diffraction fringes easier to observe, in one embodiment, the light emitted by the light emitting surface of the light emitter 110 is infrared light, and a narrow-band filter 1260 is embedded at one end of the light shielding edge 1222 away from the receiving screen 1220. By embedding the narrow-band filter 1260 at one end of the light shielding edge 1222 away from the receiving screen 1220, the narrow-band filter 1260 can further filter out other light in the ambient light except the infrared light, so as to further reduce the interference of other light on the diffraction fringes on the receiving screen 1220. Among them, the narrow-band filter is preferably a 940nm narrow-band filter.

[0053] Combination Figure 4 As shown, in one embodiment, the receiver 120 also includes an observation darkbox 1230; the observation darkbox 1230 is lifted and installed on the magnetic suction platform 1210, and is located on the side of the receiving screen 1220 away from the gap 2210 between the two pressure rollers 220 of the pole piece rolling device 200; a light-shielding port 1231 and a lookout port 1232 are provided on the observation darkbox 1230; the receiving screen 1220 is a light-transmitting screen, the light-shielding port 1231 is pressed against the edge of the receiving screen 1220, and the lookout port 1232 is arranged opposite to the scale line 1221. It can be understood that the observation dark box 1230 is located on the side of the receiving screen 1220 away from the gap 2210 between the two rollers 220 of the pole piece rolling device 200, and the light shielding port 1231 is pressed against the edge of the receiving screen 1220, so as to avoid the interference of the surrounding environment on the diffraction stripes on the receiving screen 1220. The receiving screen 1220 is a light-transmitting screen, and the observation port 1232 is arranged relative to the scale line 1221, so that the user can directly observe the position relationship between the scale line 1221 on the receiving screen 1220 and the diffraction stripes through the observation port 1232, and then directly observe the width of the diffraction stripes on the receiving screen 1220 through the human eye, and finally obtain the size of the gap 2210 between the two rollers 220 of the pole piece rolling device 200. Among them, the spacing between the observation port 1232 and the light-transmitting screen can be designed according to the observation requirements, so that the human eye can observe the diffraction stripes on the light-transmitting screen 1220.

[0054] Usually, due to the structural design of the observation dark box 1230, when the width of the diffraction stripes is relatively small, it will be difficult for the human eye to obtain the width of the diffraction stripes based on the scale line 1221.

[0055] Combination Figure 5As shown, in order to enable the diffraction stripes and the scale lines 1221 to be clearly observed at the same time, in one embodiment, a magnifying observation mechanism 1250 is provided in the observation darkbox 1230, and the magnifying observation mechanism 1250 includes a mounting slide 1251, a magnifying lens 1252 and a push-pull drive rod 1253. The mounting slide 1251 is slidably connected to the inner wall of the observation darkbox 1230, and the magnifying lens 1252 is mounted on the mounting slide 1251. The light-transmitting screen is arranged opposite to the observation port 1232 through the magnifying lens 1252; the push-pull drive rod 1253 is fixedly connected to the mounting slide 1251, and a portion of the push-pull drive rod 1253 extends out of the observation darkbox 1230 to form a handle 1201. It can be understood that when the diffraction stripes and the scale lines 1221 are blurred, the user can use the handle 1201 to make the push-pull drive rod 1253 push the installation slide 1251 to move horizontally, so as to adjust the position of the magnifying lens 1252 and the light-transmitting screen, so that the diffraction stripes and the scale lines 1221 on the light-transmitting screen can be magnified simultaneously through the large lens. Finally, the human eye can clearly observe the positional relationship between the diffraction stripes and the scale lines 1221 through the observation port 1232 to achieve accurate observation of the width of the diffraction stripes.

[0056] Usually, it is difficult to manually control the force of the push-pull driving rod 1253 by the handle 1201, which makes it difficult to quickly determine the position of the magnifying observation mechanism 1250, making it inconvenient to use.

[0057] Combination Figure 5 and Figure 6 As shown, in order to solve the above problems, in one embodiment, a push block 1234 with a threaded hole 1206 is fixedly installed on the observation dark box 1230; the push-pull drive rod 1253 partially rotates and penetrates the threaded hole 1206 of the push block 1234, and the external thread on the push-pull drive rod 1253 engages with the internal thread of the threaded hole 1206; a toothed structure 1233 is provided on the inner wall of the observation dark box 1230, and a gear 1202 is rotatably installed on the mounting slide 1251, and the gear 1202 engages with the toothed structure 1233. It can be understood that when the position of the magnified observation mechanism 1250 needs to be adjusted, the user can drive the push-pull drive rod 1253 to rotate in the threaded hole 1206 of the push block 1234 through the handle 1201, so that the push-pull drive rod 1253 is pushed more slowly, thereby reducing the problem of the user's difficulty in controlling the strength. At the same time, since the mounting slide 1251 is meshed with the tooth structure 1233 on the inner wall of the observation darkroom 1230 through the gear 1202, the friction between the gear 1202 and the tooth structure 1233 makes it less likely to move randomly in the observation darkroom 1230, and thus can be more stably controlled by pushing and pulling the driving rod 1253.

[0058] Usually, when adjusting the gap 2210 between the two rollers 220 of the rolling device, the operator often adjusts one roller 220 to move toward the other roller 220, so that when the position between the two rollers 220 is adjusted, the center position of the gap 2210 between the two rollers 220 will change. At this time, the light emitted by the light emitting surface of the light emitter 110 will deviate from the center position of the scale line 1221 on the light-transmitting screen, and thus will be out of the field of view of the observation port 1232.

[0059] Combination Figure 5 and Figure 6 As shown, in order to solve the above problem, in one embodiment, a drum-shaped swing cavity 1203 is provided on the mounting slide 1251, and a push-swing groove 1204 is provided on the inner wall of the drum-shaped swing cavity 1203; a magnifying lens 1252 is rotatably arranged in the drum-shaped swing cavity 1203; the edge of the magnifying lens 1252 is slidably pressed against the inner wall of the drum-shaped swing cavity 1203, and a push-swing protrusion 1205 is protruded into the push-swing groove 1204; a guide hole 1207 is fixedly installed on the observation dark box 1230. A push block 1235 and a swing push rod 1236 are rotatably provided in the guide hole 1207, and the internal thread on the wall of the guide hole 1207 engages with the external thread on the swing push rod 1236; the first end of the swing push rod 1236 extends into the push-swing groove 1204 and abuts against the swing projection 1205; the second end of the swing push rod 1236 extends out of the observation darkroom 1230 to form a handle 1208; the swing projection 1205 is elastically connected to a side wall of the push-swing groove 1204 away from the swing push rod 1236. It can be understood that when the light emitted by the light-emitting surface of the light emitter 110 is out of the field of view of the observation port 1232, the handle 1208 can be used to drive the swing push rod 1236 to rotate in the guide hole 1207, so that the swing push rod 1236 is pushed toward the swing protrusion 1205, thereby allowing the magnifying lens 1252 to overcome the elastic force and rotate in the drum-shaped swing cavity 1203. After the magnifying lens 1252 rotates, it can refract the light emitted by the light-emitting surface of the light emitter 110 into the field of view of the observation port 1232.

[0060] Usually, since the width of the diffraction stripes is usually in the millimeter level and the error when observed by the human eye is large, in order to further improve the measurement accuracy of the diffraction stripe width, the gap 2210 between the two pressing rollers 220 of the pole piece rolling device 200 is adjusted more accurately, and ultimately the deviation in the thickness of the battery pole piece rolled out by the pole piece rolling device 200 is reduced.

[0061] In one embodiment, in order to solve the above problem, the receiving screen 1220 is further provided with a CCD image sensor (not shown) and a processor (not shown) electrically connected to each other. The processor is used to be electrically connected to the cantilever control box 230 of the pole piece rolling device 200. The CCD image sensor is arranged close to the scale line 1221, so that the diffraction stripes can be sensed by the CCD image sensor, thereby obtaining the values ​​of the scale line 1221 corresponding to the upper and lower edge positions of the diffraction stripes. The CCD image sensor outputs the values ​​of the scale line 1221 corresponding to the upper and lower edge positions of the diffraction stripes to the processor. The processor calculates the difference between the values ​​of the scale line 1221 corresponding to the upper edge position of the diffraction stripes and the values ​​of the scale line 1221 corresponding to the lower edge position of the diffraction stripes, thereby being able to more accurately obtain the width of the diffraction stripes, and finally outputs the width of the diffraction stripes through the display screen of the cantilever control box 230 for reference by the operator. Among them, the electrical connection can be in various forms such as wired connection and wireless connection. It can be understood that the wired connection can be a wire connection or a circuit board connection, etc., and the wireless connection can use a Bluetooth connection or a WIFI (Wireless Fidelity) connection, etc. The specific connection method is not limited, and technical personnel in this field can also make adjustments as needed.

[0062] Combination Figure 1 and Figure 2 As shown, the present disclosure also provides a pole piece rolling mill 10, including a pole piece rolling device 200 and a portable roller gap optical meter 100 of any of the above-mentioned embodiments, wherein the light transmitter 110 and the receiver 120 can be detachably installed on the pole piece rolling device 200, and the light emitting surface of the light transmitter 110 is arranged toward the gap 2210 between the two pressure rollers 220 of the pole piece rolling device 200; the receiving surface of the receiver 120 is arranged toward the gap 2210 between the two pressure rollers 220 of the pole piece rolling device 200, and is arranged opposite to the light emitting surface of the light transmitter 110. It can be understood that by applying the portable roller gap optical measuring instrument 100 disclosed in the present invention to the pole piece rolling mill 10, the width of the diffraction stripes can be measured by the scale lines 1221 on the receiving surface of the receiver 120 to more quickly obtain the size of the gap 2210 between the two rollers 220 of the pole piece rolling device 200. When the pole piece rolling device 200 is adjusted, not only can the size of the gap 2210 between the two rollers 220 of the pole piece rolling device 200 be obtained in real time through the scale lines 1221 so that it can be quickly adjusted to the preset width, but also there is no need to use the pole piece strip sample for repeated testing, thereby reducing the waste of the pole piece strip sample. In one embodiment, the pole piece rolling device 200 disclosed in the present invention can use the limit protection mechanism disclosed in Chinese patent CN201295699Y to adjust the gap 2210 between the two rollers 220. Of course, this is not limited here, and those skilled in the art can also make other choices as needed.

[0063] The present disclosure also provides a roller gap optical measurement method, which is performed using a portable roller gap optical measurement instrument of any of the above embodiments, and includes the following steps: obtaining a current diffraction fringe width based on diffraction fringe formed on a receiving surface of a receiver; comparing whether the current diffraction fringe width is greater than or equal to a preset diffraction fringe width; when the current diffraction fringe width is greater than or equal to the preset diffraction fringe width, adjusting the positions of two pressure rollers of a pole piece rolling device so that the two pressure rollers are close to each other; when the current diffraction fringe width is less than the preset diffraction fringe width, adjusting the positions of two pressure rollers of a pole piece rolling device so that the two pressure rollers are away from each other; the preset diffraction fringe width and the thickness of a battery pole piece rolled out by the pole piece rolling device satisfy the following relationship: W=kλ(S / T); wherein T is the thickness of the battery pole piece rolled out by the pole piece rolling device, k is the conversion coefficient, λ is the wavelength of light emitted from the light emitting surface of the light emitter, S is the distance between the light emitter and the receiver, and W is the preset diffraction fringe width.

[0064] The above-mentioned roller gap optical measurement method determines the thickness T of the battery pole piece rolled out by the rolling device according to the requirements of the battery pole piece model. By presetting the relationship between the diffraction fringe width W and the thickness T of the battery pole piece rolled out by the pole piece rolling device, the preset diffraction fringe width W can be quickly obtained, so that by comparing the current diffraction fringe width with the preset diffraction fringe width W, the difference between the gap between the two rollers of the pole piece rolling device and the positions to which the two rollers of the pole piece rolling device need to be adjusted can be more intuitively judged, thereby providing a reference for the adjustment of the two rollers of the pole piece rolling device to speed up the adjustment of the two rollers of the pole piece rolling device.

[0065] Combination Figure 2 and Figure 7 As shown, it is a flow chart of a roll gap optical measurement method according to an embodiment of the present disclosure. The roll gap optical measurement method is performed using the portable roll gap optical measurement instrument 100 of any of the above embodiments, and includes the following steps:

[0066] SI: The current diffraction fringe width is obtained according to the diffraction fringe formed on the receiving surface of the receiver 120. It can be understood that since the light emitted from the light emitting surface of the light emitter 110 will be diffracted after passing through the gap 2210 between the two rollers 220 of the rolling device, diffraction fringe will be formed on the receiving surface of the receiver 120, so that the user can obtain the width of the diffraction fringe through the scale on the receiving surface.

[0067] SII: Compare whether the current diffraction fringe width is greater than or equal to the preset diffraction fringe width. It can be understood that by comparing the current diffraction fringe width with the preset diffraction fringe width, the difference between the gap 2210 between the two rollers 220 of the pole piece rolling device 200 and the positions to which the two rollers 220 of the pole piece rolling device 200 need to be adjusted can be more intuitively judged, thereby providing a reference for adjusting the two rollers 220 of the pole piece rolling device 200.

[0068] SIII: When the current diffraction stripe width is greater than or equal to the preset diffraction stripe width, the positions of the two rollers 220 of the pole piece rolling device 200 are adjusted to bring the two rollers 220 closer to each other. It can be understood that when the current diffraction stripe width is greater than or equal to the preset diffraction stripe width, it indicates that the gap 2210 between the two rollers 220 of the pole piece rolling device 200 is too large, so the positions of the two rollers 220 of the pole piece rolling device 200 can be adjusted to bring the two rollers 220 closer to each other, and then the gap 2210 between the two rollers 220 of the pole piece rolling device 200 can be reduced, so that the thickness of the battery pole piece rolled out by the pole piece rolling device 200 is reduced.

[0069] SIV: When the current diffraction fringe width is less than the preset diffraction fringe width, the positions of the two rollers 220 of the pole piece rolling device 200 are adjusted so that the two rollers 220 are moved away from each other. It can be understood that when the current diffraction fringe width is less than the preset diffraction fringe width, it indicates that the gap 2210 between the two rollers 220 of the pole piece rolling device 200 is too small, so that the positions of the two rollers 220 of the pole piece rolling device 200 can be adjusted to move the two rollers 220 away from each other, and then the gap 2210 between the two rollers 220 of the pole piece rolling device 200 can be expanded, so that the thickness of the battery pole piece rolled out by the pole piece rolling device 200 is increased.

[0070] The preset diffraction fringe width and the thickness of the battery pole piece rolled out by the pole piece rolling device 200 satisfy the following relationship:

[0071] W=kλ(S / T)

[0072] Wherein, T is the thickness of the battery pole piece rolled out by the pole piece rolling device 200, 2mm≥T≥0.03mm, k is the conversion coefficient, λ is the wavelength of the light emitted by the light emitting surface of the light emitter 110, and the light emitted by the light emitting surface of the light emitter 110 is infrared light, wherein 1mm≥λ≥7.60×10 -4 mm, S is the distance between the light emitter 110 and the receiver 120, and W is the preset diffraction fringe width.

[0073] It can be understood that, because the thickness T of the battery pole piece is rolled out by the two rollers 220 of the pole piece rolling device 200, the thickness T of the battery pole piece can reflect the gap 2210 between the two rollers 220 of the pole piece rolling device 200, and because the thickness of the battery pole piece is usually between 0.03 mm and 2 mm, the gap 2210 between the two rollers 220 of the rolling device also mainly varies between 0.03 mm and 2 mm. At this time, the light emitted from the light emitting surface of the light emitter 110 will be reflected by the gap 2210 between the two rollers 220 of the rolling device. After the gap 2210 between the two rollers 220 of the pole piece rolling device 200 is formed, diffraction occurs to form diffraction stripes on the receiving surface of the receiver 120, so that the thickness T of the battery pole piece is reflected by measuring the width of the diffraction stripes, so that the difference between the gap 2210 between the two rollers 220 of the pole piece rolling device 200 and the position to which the two rollers 220 of the pole piece rolling device 200 need to be adjusted can be more intuitively judged by comparing the preset diffraction stripe width W with the current diffraction stripe width, and thus a reference can be provided for the adjustment of the two rollers 220 of the pole piece rolling device 200. In this way, it is more convenient for users to adjust the two rollers 220 of the pole piece rolling device 200 to a suitable position according to the current diffraction stripe width, thereby reducing the waste of small samples of the pole piece strip. In one embodiment, the diffraction stripe width can be selected as the central bright stripe width, that is, the distance between the two first-level dark stripes, which can be more convenient for users to observe.

[0074] In another embodiment, T is 1 mm, k is 17.34, the light emitted by the light emitting surface of the light emitter 110 is infrared light, and the wavelength λ of the infrared light is 7.60×10 -4 mm, the distance S between the light transmitter 110 and the receiver 120 is 780 mm, and the preset diffraction fringe width W≈10 mm can be obtained by using the above formula.

[0075] Combination Figure 2 As shown, in another embodiment, a camera (not shown) is installed on the receiver 120 to solve the problem of inaccurate measurement when the diffraction fringe width is too narrow.

[0076] SI: According to the diffraction fringes formed on the receiving surface of the receiver 120, the current diffraction fringes width is obtained, which specifically includes the following steps:

[0077] SIa: Obtain the diffraction fringe image formed on the receiving surface of the receiver 120 to obtain the scale line 1221 value corresponding to the upper edge of the diffraction fringe and the scale line 1221 value corresponding to the lower edge of the diffraction fringe;

[0078] SIb: Calculate the difference between the value of the scale line 1221 corresponding to the upper edge of the diffraction stripe and the value of the scale line 1221 corresponding to the lower edge of the diffraction stripe to obtain the current diffraction stripe width.

[0079] In this embodiment, the receiving surface of the receiver 120 is directly photographed by a camera, so that the diffraction fringe image formed on the receiving surface of the receiver 120 can be obtained. The diffraction fringe image is located on the scale line 1221 of the receiving surface. Since the upper and lower edges of the diffraction fringe will form a shadow boundary on the scale line 1221 of the receiving surface, the camera can easily identify the scale line 1221 value corresponding to the upper edge of the diffraction fringe and the scale line 1221 value corresponding to the lower edge of the diffraction fringe. By calculating the difference between the scale line 1221 value corresponding to the upper edge of the diffraction fringe and the scale line 1221 value corresponding to the lower edge of the diffraction fringe, the current diffraction fringe width can be quickly obtained.

[0080] Compared with the prior art, the present invention has at least the following advantages:

[0081] 1) Since the receiving surface of the receiver 120 faces the gap 2210 between the two rollers 220 of the pole piece rolling device 200 and is arranged opposite to the light-emitting surface of the light emitter 110, the light emitted from the light-emitting surface of the light emitter 110 can pass through the gap 2210 between the two rollers 220 of the pole piece rolling device 200 and be projected onto the receiving surface of the receiver 120. Since the thickness of the battery pole piece is usually between 0.03 mm and 2 mm, the gap 2210 between the two rollers 220 of the rolling device also mainly varies between 0.03 mm and 2 mm. At this time, the light emitted from the light-emitting surface of the light emitter 110 will diffract after passing through the gap 2210 between the two rollers 220 of the rolling device, thereby forming diffraction stripes on the receiving surface of the receiver 120. In this way, the width of the diffraction stripes can be measured by the scale line 1221 on the receiving surface of the receiver 120, thereby obtaining the size of the gap 2210 between the two rollers 220 of the pole piece rolling device 200.

[0082] 2) Compared with the prior art, the above-mentioned portable roller gap optical meter 100 can be detachably installed on the pole piece rolling device 200. By measuring the width of the diffraction stripes through the scale lines 1221 on the receiving surface of the receiver 120, the size of the gap 2210 between the two rollers 220 of the pole piece rolling device 200 can be obtained more quickly. When the pole piece rolling device 200 is adjusted, not only can the size of the gap 2210 between the two rollers 220 of the pole piece rolling device 200 be obtained in real time through the scale lines 1221 so that it can be quickly adjusted to the preset width, but there is also no need to use a small sample of the pole piece material strip for repeated testing, thereby reducing the waste of small samples of the pole piece material strip.

[0083] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be subject to the attached claims.

Claims

1. A portable roller gap optical measuring instrument, characterized in that: include: A light emitter, the light emitter is used to be detachably mounted on the pole piece rolling device, the light emitting surface of the light emitter is used to be arranged toward the gap between the two pressing rollers of the pole piece rolling device, and the light emitting surface of the light emitter extends along the length direction of the gap between the two pressing rollers of the pole piece rolling device; and A receiver, the receiver is used to be detachably mounted on a pole piece rolling device, and is located on a side of the two rollers of the pole piece rolling device away from the light emitter; the receiving surface of the receiver faces the gap between the two rollers of the pole piece rolling device, and is arranged opposite to the light emitting surface of the light emitter; the light emitted by the light emitting surface of the light emitter is projected to the receiver through the gap between the two rollers of the pole piece rolling device, and forms diffraction stripes on the receiving surface of the receiver; the receiving surface of the receiver is provided with scale lines, and the scale lines are used to measure the width of the diffraction stripes.

2. The portable roller gap optical measuring instrument according to claim 1, characterized in that: The two ends of the light emitter are respectively used for magnetic connection to the frame of the pole piece rolling device.

3. The portable roller gap optical measuring instrument according to claim 2, characterized in that: The light emitter includes a magnetic seat, a lampshade and a light strip; the magnetic seat is used to be magnetically connected to the frame of the pole piece rolling device, and the end of the lampshade is lifted and installed on the magnetic seat; the light strip is arranged in the lampshade and faces the gap between the two rollers of the pole piece rolling device.

4. The portable roller gap optical measuring instrument according to claim 3, characterized in that: The magnetic base is provided with a lifting guide groove, and a slider is protruded into the lifting guide groove at the end of the lampshade; a fine-tuning screw is installed on the magnetic base; part of the fine-tuning screw is rotatably arranged in the lifting guide groove and threadedly matched with the screw hole of the slider.

5. The portable roller gap optical measuring instrument according to claim 1, characterized in that: The receiver includes a magnetic platform and a receiving screen; the magnetic platform is magnetically connected to the frame of the pole piece rolling device; the receiving screen is installed on the magnetic platform in a lifting manner and is arranged opposite to the gap between the two pressure rollers of the pole piece rolling device.

6. The portable roller gap optical measuring instrument according to claim 5, characterized in that: The magnetic platform is provided with a lifting screw, the thread of which is matched with the screw hole of the magnetic platform, and the receiving screen is fixedly arranged on the lifting screw.

7. The portable roller gap optical measuring instrument according to claim 5, characterized in that: The edge of the receiving screen is provided with a light-shielding surrounding edge; the light-shielding surrounding edge surrounds the receiving screen on one side facing the gap between the two pressing rollers of the pole piece rolling device.

8. The portable roller gap optical measuring instrument according to claim 5, characterized in that: The receiver also includes an observation darkbox; the observation darkbox is lifted and installed on the magnetic platform and is located on the side of the receiving screen that is away from the gap between the two pressure rollers of the pole piece rolling device; a light-shielding port and a lookout port are provided on the observation darkbox; the receiving screen is a light-transmitting screen, the light-shielding port is pressed against the edge of the receiving screen, and the lookout port is arranged opposite to the scale line.

9. A pole piece rolling mill, characterized in that: It comprises a pole piece rolling device and the portable roller gap optical measuring instrument described in any one of claims 1 to 8, wherein the light transmitter and the receiver can be detachably mounted on the pole piece rolling device, and the light emitting surface of the light transmitter is arranged toward the gap between the two pressure rollers of the pole piece rolling device; the receiving surface of the receiver is arranged toward the gap between the two pressure rollers of the pole piece rolling device and is arranged opposite to the light emitting surface of the light transmitter.

10. A roll gap optical measurement method, characterized in that: The method is performed by using the portable roller gap optical measuring instrument according to any one of claims 1 to 8, comprising: According to the diffraction fringes formed on the receiving surface of the receiver, a current diffraction fringes width is obtained; Comparing whether the current diffraction fringe width is greater than or equal to a preset diffraction fringe width; When the current diffraction fringe width is greater than or equal to the preset diffraction fringe width, adjusting the positions of the two pressing rollers of the pole piece rolling device so that the two pressing rollers are close to each other; When the current diffraction fringe width is smaller than the preset diffraction fringe width, adjusting the positions of the two pressing rollers of the pole piece rolling device so that the two pressing rollers are away from each other; The preset diffraction fringe width and the thickness of the battery pole piece rolled out by the pole piece rolling device satisfy the following relationship: W=kλ(S / T) Among them, T is the thickness of the battery pole piece rolled out by the pole piece rolling device, k is the conversion coefficient, λ is the wavelength of the light emitted by the light-emitting surface of the light emitter, S is the distance between the light emitter and the receiver, and W is the preset diffraction stripe width.

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