An electrode sheet punching machine using voiceprint rapid detection

Abstract

The present invention relates to the field of battery technology, and discloses an electrode sheet punching machine that utilizes voiceprint for rapid detection. The present invention has the following advantages and effects: 1. Easy operation and high efficiency. The present invention utilizes the principle that the same airflow generates different sound waves for the sound-emitting holes of the shape structure for detection. The sound waves generated by blowing air into the aperture of the punched electrode sheet are compared with the reference object to determine the product quality. The inspection can be performed while the production is in progress, and the assembly line operation is convenient and fast to operate. 2. Less interference and high precision. The present invention can be automatically detected by instruments, and no manual comparison is required. The equipment can be detected at any time, and there will not be a large number of defective products or genuine products mixed together, which greatly reduces waste and has a relatively high precision. 3. The equipment is simple and low in cost. The inspection equipment is easy to purchase and install, which reduces production costs and improves economic benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to an electrode sheet punching machine utilizing voiceprint rapid detection. Background Art

[0002] In recent years, with the improvement of people's living standards, there are more and more electrical appliances such as communication and digital products, power tools, instruments and meters, and electric toys, and the types of batteries used with them have also increased rapidly. At present, batteries have been widely used in all aspects of people's daily lives. With the rapid expansion of the battery market, people's requirements for its capacity and performance are getting higher and higher. The battery is composed of electrode sheets, electrolytes, diaphragms, and shells. Among them, the core material electrode sheet is composed of active materials and conductive substrates. The conductive substrate plays the role of conducting current, uniformly distributing the current potential on the electrode surface, and supporting and maintaining the active material. Depending on the type of battery design, the appearance of the battery sheet is different. With the development of the battery industry in recent years, battery design has become more and more sophisticated, and the requirements for battery sheets such as verticality and size have become higher and higher.

[0003] At present, the bending process of electrode sheets is usually carried out by pneumatic presses, hydraulic presses or punching machines. After long-term operation of the machinery, wear and deviation will inevitably occur, which is difficult to detect with the naked eye. The current production process usually produces a batch and then conducts sampling or full inspection according to the company's manpower situation. By the time problems are found, a large batch of defective products has usually been produced, causing great waste. In many cases, defective products are even mixed with genuine products, and a full inspection of the entire batch is required, which is another burden on human resources.

[0004] The prior art, such as a visual positioning pneumatic press provided by Patent Publication No. CN103522567A or an automatic calibration detection punching machine provided by Patent Publication No. CN105904636B, adopts mechanical vision or optical detection. This technology has high equipment costs and it is difficult to recover the cost when used in electrode production. Secondly, it has strict environmental requirements and most manufacturers find it difficult to meet this condition. If the factory is renovated, it will be a cost that is difficult to recover. Therefore, it is very necessary to provide a cheap, convenient electrode punching machine that can be monitored at any time. Summary of the invention

[0005] The purpose of the present invention is to provide an electrode sheet punching machine that utilizes voiceprint rapid detection, which has the effect of conveniently and rapidly detecting electrode sheets.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: an electrode sheet punching machine using voiceprint rapid detection, including a punching machine, a workbench and a clamping device, the punching machine includes a base and a punching head arranged on the base, the workbench is arranged on the base and directly below the punching head, the workbench is also provided with a punching groove for bending the electrode sheet, and the clamping device is used to press the workbench onto the base; the workbench is provided with a positioning device for calibrating the position of the punching head, a punching groove for punching out the shape of the electrode sheet and a voiceprint detection device for detecting the morphology of the electrode sheet.

[0007] The present invention is further configured as follows: the voiceprint detection device comprises a resonance cavity arranged in the workbench and a high-pressure airflow device arranged beside the workbench, and a first voiceprint sensor is arranged at the bottom of the stamping groove.

[0008] The present invention is further configured as follows: the resonance cavity comprises an air inlet duct connected to a high-pressure airflow device, and a plurality of sound-generating holes arranged according to the shape of the processed electrode sheet, and the shapes of the sound-generating holes are different.

[0009] The present invention is further configured as follows: the high-pressure airflow device includes an air nozzle and an airflow hose arranged behind the air nozzle, a plurality of resonance cavities are arranged, corresponding to different types of electrode sheets, and the arrangement of the sound holes arranged on each resonance cavity corresponds to one type of electrode sheet.

[0010] The present invention is further configured as follows: the sound holes are divided into straight holes and shrinkage holes, the straight holes are connected to the air inlet duct and the axial direction of the straight holes is perpendicular to the air inlet duct, the straight hole lengths of each sound hole are different, the shrinkage holes are used to connect the ends of the straight holes and the stamping groove walls, and the opening sizes of each shrinkage hole on the stamping groove wall are the same and smaller than the cross-sectional area of ​​the straight holes.

[0011] By adopting the above technical solution, when the high-pressure airflow passes through the vertical cavity, it will emit a soundprint with a specific wavelength according to the geometric shape of the cavity. Whether the end of the cavity is closed or not, or how much it is closed, will have a significant impact on the sound emitted. It only needs to record the soundprint once in the early stage and calibrate it regularly, so that it can be judged whether the electrode sheet fits the side wall of the stamping groove according to the sound, that is, whether the verticality meets the standard; at the same time, the arrangement of the sound holes is related to the shape of the electrode sheet fitting on the stamping groove, and a tolerance margin is reserved. If the pressure position of the electrode sheet is not aligned, then This will cause the bent part of the electrode sheet to shift and fail to align with the sound hole, resulting in the sound hole being unable to be completely covered, causing an impact on the sound that is sufficient to be judged; and the judgment of the sound is not complicated. After recording the voiceprint taken, a Fourier transform is performed on the signal. As long as the intensity of the sound wave of a specific frequency is within a certain range, it can be determined that the sound hole is making a sound normally. During the stamping process, the punch head will press the electrode sheet for several seconds to form the electrode sheet. This time is enough for the high-pressure airflow device to impact and make sounds several times, allowing the voiceprint sensor to record the sounds several times to eliminate accidental errors.

[0012] The present invention is further configured as follows: a second voiceprint sensor is provided on the punching machine.

[0013] By adopting the above technical solution, the second voiceprint sensor is far enough away from the first voiceprint sensor so that the sound received by the resonance cavity is small enough, so that the sound received by the second voiceprint sensor mainly comes from the environmental noise. By comparing the signal received by the first voiceprint sensor with the signal of the second voiceprint sensor, the environmental noise can be eliminated.

[0014] The present invention is further configured as follows: the workbench includes a table body and a base, the table body is arranged on the base, the table body and the base are fastened by bolts, the stamping groove is arranged on the table body, and a base column is arranged on the edge of the table body.

[0015] By adopting the above technical solution, different platforms can be replaced according to the electrode sheets that need to be processed to adapt to more models.

[0016] The present invention is further configured as follows: the clamping device comprises a fastening screw arranged on the base, a clamping block arranged on the fastening screw, and a clamping nut arranged on the fastening screw.

[0017] By adopting the above technical solution, a certain clamping force can be maintained to avoid errors caused by slippage of the workbench.

[0018] The present invention is further configured as follows: the positioning device includes a positioning pile arranged on the punching head and a positioning groove arranged on the platform body, the positioning pile can be slidably matched with the positioning groove, the length of the positioning groove is 3-4mm longer than the length of the positioning pile, and the bolts for fastening between the platform body and the base are arranged in the positioning groove.

[0019] By adopting the above technical solution, the groove of the fastening bolt and the positioning groove are combined together to reduce the processing complexity of the platform.

[0020] The beneficial effects of the present invention are:

[0021] 1. Easy operation and high efficiency. The present invention uses the principle that the same airflow produces different sound waves on the sound-emitting holes of different shapes and structures for detection. The sound waves produced by blowing air on the aperture of the stamped electrode sheet are compared with the control object to determine the product quality. The invention can detect while producing, and the assembly line operation is convenient and fast to operate.

[0022] 2. Less interference and high precision. The present invention can be automatically detected by instruments without manual comparison. After long-term operation, the machine will inevitably wear out and deflect, which is difficult to detect with the naked eye. The equipment can detect it at any time, and there will be no large batches of defective products or genuine products mixed together, which greatly reduces waste and has relatively high precision.

[0023] 3. The equipment is simple and low-cost. The inspection equipment is easy to purchase and install, which reduces production costs and improves economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0026] Figure 2 It is an enlarged view of point A of the present invention.

[0027] Figure 3 It is a schematic diagram of the shape of the resonant cavity of the present invention.

[0028] Figure 4 This is a three-dimensional structural schematic diagram of another angle of the present invention

[0029] Figure 5 It is a schematic diagram of the shape of the workpiece being processed according to the present invention.

[0030] Figure 6 It is a resonant cavity in another embodiment of the present invention.

[0031] In the figure, 1, punching machine; 11, punching head; 12, base; 121, second voiceprint sensor; 2, workbench; 21, punching groove; 211, first voiceprint sensor; 22, positioning device; 221, positioning pile; 222, positioning groove; 23, platform; 231, base column; 24, base; 3, clamping device; 31, fastening screw; 32, clamping block; 33, clamping nut; 4, voiceprint detection device; 41, resonance cavity; 411, air inlet; 412, sound hole; 4121, straight hole; 4122, shrinkage hole; 42, high-pressure airflow device; 421, jet nozzle; 422, airflow hose; a1, bending part; a2, flute-shaped cavity; a3, sound generator. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments.

[0033] Example 1

[0034] In this embodiment, Figure 1 As shown, the present invention includes a punching machine 1, a workbench 2, and a clamping device 3. A voiceprint detection device 4 is arranged on the workbench 2. The punching machine 1 is divided into a punching head 11 and a base 12. The punching head 11 is arranged on the base 12. The workbench 2 is below the punching machine 1. The clamping device 3 is used to press the workbench 2 onto the base 12.

[0035] The workbench 2 is divided into a table body 23 and a base 24, which are fastened by bolts and can be replaced according to the shape of the electrode sheet to be bent. The bolts connecting the table body 23 and the base 24 are set in the positioning groove 222, and a positioning pile 221 is set at the same position on the punch head 11. The positioning groove 222 and the positioning pile 221 can cooperate with each other to reduce the displacement of the punch head 11. The positioning pile 221 is slightly shorter than the positioning groove 222, and the bottom is used to accommodate the bolt.

[0036] In this embodiment, a punching groove 21 is provided on the platform 23, and a limiting column is provided next to the punching groove 21 for limiting the position of the electrode sheet. When punching, the punching head 11 is lowered. Figure 4 As shown in FIG. 1 , there is a block that cooperates with the punching groove 21, and the electrode sheet is bent to form a Figure 5 As shown in the bending angle at a1, a voiceprint detection device 4 is arranged in the platform 23, and the voiceprint detection device 4 includes a resonance cavity 41 and a high-pressure airflow device 42. The resonance cavity 41 is arranged in the platform 23 and has a shape as shown in FIG. Figure 3As shown, it is divided into an air inlet 411 and a sound hole 412. The air inlet 411 is inclined compared to the inner wall of the stamping groove 21, which is convenient for setting sound holes 412 of different lengths. The sound holes 412 are divided into straight holes 4121 and shrinkage holes 4122. The straight holes 4121 are connected to the air inlet 411, and the diameter and length of each straight hole 4121 are different. The shrinkage holes 4122 are used to connect the straight holes 4121 and the stamping groove 21. One end of the shrinkage hole 4122 has the same diameter as the straight hole 4121, and the other end is reduced to a specific diameter. The axes of the shrinkage hole 4122 and the straight hole 4121 coincide, and the axis of the shrinkage hole 4122 is perpendicular to the wall of the stamping groove 21. When the high-pressure airflow device 42 emits a high-pressure airflow, it will impact the sound hole 412. Because the shape and structure of each hole are different, the sounds emitted are also different, so voiceprint detection can be implemented. The arrangement of the sound holes 412 and Figure 5 The electrode sheet shown in the figure has roughly the same shape in the stamping groove 21 after bending. When the electrode sheet is bent, it will not only bend downward, but also slightly deviate to the left and right due to the force point. The error caused by this part of the deviation will be taken into account when setting the arrangement of the sound hole 412. When the error is within the tolerance range, the sound hole 412 should be completely covered. The electrode sheet has a high verticality requirement. When the electrode sheet is bent, the sound hole 412 should be completely closed, causing the sound hole 412 to emit a specific sound. When the sound emitted by the sound hole 412 is different from the predetermined sound, it means that the sound hole 412 is not completely covered. Either the verticality of the electrode sheet does not meet the requirements, or the left and right deviation of the bent part exceeds the tolerance. In short, they are all unqualified products and can be quickly detected.

[0037] A first voiceprint sensor 211 is arranged in the stamping groove 21, which is used to receive and identify the sound of the sound hole 412, but it will inevitably be interfered by neighboring devices, so a second voiceprint sensor 121 is arranged on the base 12. The second voiceprint sensor 121 is far enough from the stamping hole to make it difficult to receive the sound emitted by the sound hole 412. By comparing the signals of the first voiceprint sensor 211 and the second voiceprint sensor 121, the interference of environmental noise can be eliminated.

[0038] The high-pressure airflow device 42 is divided into an air nozzle 421 and an airflow hose 422. In some embodiments, the stamping groove 21 on the platform 23 can adapt to a variety of electrode sheets, so a plurality of resonance cavities 41 are provided. Therefore, it is necessary to switch the high-pressure airflow device 42 between different resonance cavities 41. This can be easily achieved by using the airflow hose 422.

[0039] The clamping device 3 includes a fastening screw 31 arranged on the base 12 , a clamping block 32 slidably connected to the fastening screw 31 , and a clamping nut 33 threadedly connected to the fastening screw 31 , which can clamp the workbench 2 onto the base 12 .

[0040] A base column 231 is provided on the table body 23 of the workbench 2, mainly for dispersing pressure. The resonance cavity 41 in the table body 23 has been hollowed out, and the strength will be reduced. Therefore, the base column 231 is provided in a relatively dense part to concentrate the pressure of the punch head 11 on the workbench 2 on the dense part, thereby reducing the deformation of the resonance cavity 41 under the action of pressure.

[0041] It should be noted that the resonant cavity 41 is a cavity with an irregular shape and structure, and a conventional cross-sectional view is difficult to intuitively display its shape and structure, so Figure 3 It is only a schematic diagram for conveniently describing the shape of the resonance cavity 41 and is not an actual component. Figure 5 It is a workpiece used for processing in the present embodiment of the present invention, which only serves to facilitate the description of the present invention and is not a structure that actually needs to be protected. Therefore, not describing its size and structure in detail does not affect the scheme and protection scope described in this embodiment and this application.

[0042] Example 2

[0043] The rest of the parts are the same as those in the first embodiment, except that the resonance cavity 41 is provided with a sound generator a3, and the shape of the resonance cavity is changed to a flute-shaped cavity a2. Figure 6 As shown. A generator a3 is arranged outside the flute-shaped cavity. The structure of the generator a3 is similar to that of a vertical flute. Several flute-shaped cavities a2 are arranged inside the platform 23. A generator is arranged outside each flute-shaped cavity a2. The openings on the flute-shaped cavity a2 just form the shape of the electrode sheet. The advantages of this structure are simple structure, low manufacturing level, and clear sound. The disadvantages are that the sound effects of many holes are the same, and it is difficult to identify the position of the hole with wrong sound. It is difficult to directly use software to determine the type of problem with the workpiece, and manual assistance is required. It is suitable for small enterprises.

[0044] It should be noted that, because it is difficult to graphically express the structure of an irregular cavity inside a rectangular parallelepiped, the flute-shaped cavity a2 in the figure is a shape diagram for conveniently describing the cavity structure of the resonance cavity 41 inside the platform 23, and is not an actual component.

[0045] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. An electrode sheet punching machine (1) using voiceprint rapid detection, comprising a punching machine (1), a workbench (2) and a pressing device (3), characterized in that: The punching machine (1) comprises a base (12) and a punching head (11) arranged on the base (12); the workbench (2) is arranged on the base (12) and directly below the punching head (11); a punching groove (21) for bending an electrode sheet is also arranged on the workbench (2); the pressing device (3) is used to press the workbench (2) onto the base (12); the workbench (2) is provided with a positioning device (22) for calibrating the position of the punching head (11), a punching groove (21) for punching out the shape of the electrode sheet, and a voiceprint detection device (4) for detecting the morphology of the electrode sheet; The voiceprint detection device (4) comprises a resonance cavity (41) arranged in the workbench (2) and a high-pressure airflow device (42) arranged next to the workbench (2), and a first voiceprint sensor (211) is arranged at the bottom of the stamping groove (21); The resonance cavity (41) comprises an air inlet duct (411) connected to a high-pressure airflow device (42), and a plurality of sound-generating holes (412) arranged according to the shape of the electrode sheet being processed, wherein the shapes of the sound-generating holes (412) are different; The high-pressure airflow device (42) comprises an air nozzle (421) and an airflow hose (422) arranged behind the air nozzle (421); a plurality of resonance cavities (41) are provided, each corresponding to an electrode sheet of different models; and the arrangement of the sound-emitting holes (412) provided on each resonance cavity (41) corresponds to an electrode sheet of one model; A limiting column for limiting the position of the electrode sheet is provided next to the punching groove (21).

2. The electrode sheet punching machine (1) using voiceprint rapid detection according to claim 1, characterized in that: The sound-generating holes (412) are divided into straight holes (4121) and shrinkage holes (4122); the straight holes (4121) are connected to the air inlet duct (411); the diameter and length of the straight holes (4121) of each sound-generating hole (412) are different; the shrinkage holes (4122) are used to connect the ends of the straight holes (4121) and the wall of the stamping groove (21); the axes of the shrinkage holes (4122) are perpendicular to the wall of the stamping groove (21); and the opening sizes of each shrinkage hole (4122) on the wall of the stamping groove (21) are the same and are smaller than the cross-sectional area of ​​the straight holes (4121).

3. The electrode sheet punching machine (1) using voiceprint rapid detection according to claim 1, characterized in that: The punching machine (1) is provided with a second voiceprint sensor (121).

4. The electrode sheet punching machine (1) using voiceprint rapid detection according to claim 1, characterized in that: The workbench (2) comprises a platform body (23) and a base (24); the platform body (23) is arranged on the base (24); the platform body (23) and the base (24) are fastened by bolts; the stamping groove (21) is arranged on the platform body (23); and a base column (231) is arranged at the edge of the platform body (23).

5. The electrode sheet punching machine (1) using voiceprint rapid detection according to claim 3, characterized in that: The clamping device (3) comprises a fastening screw (31) arranged on a base (12), a clamping block (32) arranged on the fastening screw (31), and a clamping nut (33) arranged on the fastening screw (31).

6. The electrode sheet punching machine (1) using voiceprint rapid detection according to claim 3, characterized in that: The positioning device (22) comprises a positioning pile (221) arranged on the punch head (11) and a positioning groove (222) arranged on the platform (23); the positioning pile (221) can be slidably matched with the positioning groove (222); the length of the positioning groove (222) is 3-4 mm longer than that of the positioning pile (221); and a bolt for fastening between the platform (23) and the base (24) is arranged in the positioning groove (222).

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