A battery bottom marking device and a marking method

Abstract

The present invention relates to a battery bottom marking device and a marking method. The marking device includes a feeding structure, a transfer structure, and an engraving structure. The feeding structure is used to convey cylindrical batteries to be detected and marked; the transfer structure is used to clamp the batteries at the feeding structure and complete the outer diameter detection of the cylindrical batteries during the transfer process; the engraving structure is used to receive the cylindrical batteries transferred by the transfer structure and perform marking processing on the bottom of the batteries. During actual marking, the cylindrical batteries are conveyed by the feeding assembly, and pneumatic grippers are used for automatic material taking. After multiple outer diameter measurements of the cylindrical batteries, the batteries are then placed into the holding assembly. Through the holding of the cylindrical batteries by the holding assembly, it is avoided that they fall during flipping and marking, realizing the completion of front processing and then marking processing on the bottom. Compared with manual flipping, the marking efficiency of the batteries is improved, and the consistency of the positions of the cylindrical batteries after flipping is ensured, improving the qualification rate of the finished products after marking.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery processing, and particularly relates to a battery bottom marking device and a marking method. Background Art

[0002] Currently, batteries have been widely used in various industries, such as mobile phones, tablets, laptops, desktop computers, electric cars, electric buses, and so on. Consumers have a very large demand for batteries, and the quality requirements for lithium batteries are getting higher and higher.

[0003] Encoding and marking the battery is an important process in the production process of lithium batteries. Only when there is a unique code on the lithium battery can the various test data of the lithium battery be corresponding to this lithium battery one by one, and it can be determined whether the quality of this lithium battery is qualified. To avoid affecting the packaging of the lithium battery, usually, marking treatment is carried out at the bottom of the lithium battery.

[0004] In the existing lithium battery marking process, the operator needs to turn the lithium battery 180° and place it under the marking machine or laser machine, and the marking operation is completed by the laser machine above. Workers are prone to fatigue in the long-term working mode, which reduces the marking efficiency of the battery. Moreover, more importantly, the operator cannot accurately place the turned battery under the marking machine or laser machine, and it is easy to occur the situation of marking deviation, reducing the qualification rate of the finished product. Summary of the Invention

[0005] The present invention provides a battery bottom marking device and a marking method, which solve the defects of low marking efficiency and easy marking deviation existing in the existing marking process.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a battery bottom marking device, which includes the following steps:

[0007] A feeding structure, the feeding structure includes a roller line, a tray placed on the top of the roller line, and a positioning component arranged outside the roller line and used for positioning the tray, and the tray is inserted with a battery;

[0008] A transfer structure, the transfer structure includes a support frame erected above the roller line, a transfer plate arranged on the support frame and movable along the X, Y, and Z axes, and a pneumatic gripper fixed at the bottom of the transfer plate, and the pneumatic gripper is used for gripping the battery on the tray;

[0009] An engraving structure, the engraving structure includes a moving plate moving along the X axis, a corner plate rotatably installed on one side of the moving plate, a holding component arranged on the corner plate and used for holding the battery, and an engraving machine moving along the Y axis, and the engraving machine is used for marking the bottom of the battery;

[0010] The blanking structure is arranged on the other side of the engraving structure. The blanking structure has the same structure as the loading structure and is used for blanking after marking the bottom of the battery.

[0011] Optimally, the tray includes a tray bottom plate, a tray middle plate integrally connected above the tray bottom plate, a tray top plate integrally connected above the tray middle plate, a first through hole penetrating through the tray top plate and the tray middle plate, and a second through hole penetrating through the tray bottom plate. The diameter of the first through hole is larger than that of the second through hole, and the battery is inserted into the first through hole.

[0012] Optimally, the positioning assembly includes a positioning groove opened on the outer side of the tray and a positioning block movably arranged on the top of the roller line. The positioning block is inserted into the positioning groove to complete the positioning of the tray.

[0013] Optimally, the transfer structure further includes a clamping block fixed at the bottom of the pneumatic gripper, an arc portion arranged inside the clamping block, and a projection tester arranged on one side of the roller line and oppositely arranged. The pneumatic gripper clamps the battery to between the projection testers and drives the battery to rotate, so as to complete the measurement of the outer diameter of the battery.

[0014] Optimally, the holding assembly includes a transition post embedded in the angle plate, a temporary storage groove vertically penetrating through the transition post, a support plate integrally connected to the bottom of the transition post, an avoidance hole penetrating through the support plate and communicating with the temporary storage groove, a holding groove opened on the outer side of the transition post, a clamping plate elastically arranged on one side of the transition post, and a holding portion opened on the side of the clamping plate close to the transition post;

[0015] After the battery is inserted into the temporary storage groove, the clamping plate moves towards the transition post until the holding portion holds the outer wall of the battery.

[0016] Optimally, the holding assembly further includes a baffle fixed at the top of the angle plate, a spring arranged between the baffle and the clamping plate, a second push bar integrally connected to one side of the clamping plate, a pushing cylinder fixed at the top of the moving plate, a push plate connected to the pushing cylinder, and a first push bar integrally connected to one side of the push plate and cooperating with the second push bar.

[0017] Optimally, the holding assembly further includes a guiding portion obliquely arranged at the top of the temporary storage groove, a slide rail fixed at the top of the angle plate, and a slider slidably mounted on the slide rail. The clamping plate is fixed on the slider.

[0018] Optimally, the engraving structure further includes a first slide table, a rotary cylinder fixed to the top of the moving plate, a photoelectric sensor adjustably arranged on one side of the first slide table, and an induction sheet fixed to the bottom of the moving plate and cooperating with the photoelectric sensor. The moving plate is fixed on the first slide table, and the angle plate is fixed on the rotary cylinder.

[0019] Optimally, the engraving structure further includes a side rail fixed to one side of the first slide table, a locking block slidably connected in the side rail, and a locking nut penetrating the locking block. The photoelectric sensor is fixed to the locking block.

[0020] The present invention also provides a method for marking the bottom of a battery, including the following steps:

[0021] S1. Convey a tray with inserted batteries through a roller line:

[0022] S2. Complete the positioning of the tray by a positioning component;

[0023] S3. Clamp the battery positioned in step S2 by a transfer structure and perform multiple outer diameter measurements on it;

[0024] S4. The transfer structure transfers the battery after outer diameter measurement to a holding component, and the holding component completes the holding of the battery;

[0025] S5. The holding component flips to make the bottom of the battery face upward;

[0026] S6. Complete the bottom marking of the battery flipped in step S5 by an engraving machine;

[0027] S7. The holding component flips the battery after bottom marking in step S6, and the blanking structure completes the blanking of the battery.

[0028] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0029] The battery bottom marking device of the present invention conveys cylindrical batteries through a feeding component and uses a pneumatic gripper for automatic material taking. After multiple outer diameter measurements of the cylindrical batteries, the batteries are then placed into a holding component. Through the holding of the cylindrical batteries by the holding component, it is avoided that they fall during flipping and marking, and the bottom is marked and processed. Compared with manual flipping, the marking efficiency of the battery is improved, and the consistency of the position of the cylindrical battery after flipping is ensured, improving the qualification rate of the finished product after marking. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the present invention;

[0031] Figure 2 is a schematic structural diagram of the feeding structure of the present invention;

[0032] Figure 3 The front view of the feeding structure of the present invention;

[0033] Figure 4 The structural schematic diagram of the tray of the present invention;

[0034] Figure 5 The cross-sectional view of the tray of the present invention;

[0035] Figure 6 The structural schematic diagram of the transfer structure of the present invention;

[0036] Figure 7 The partial structural schematic diagram of the transfer structure of the present invention;

[0037] Figure 8 The structural schematic diagram of the engraving structure of the present invention;

[0038] Figure 9 For the present invention Figure 8 The enlarged view at A in;

[0039] Figure 10 The partial structural schematic diagram of the engraving structure of the present invention;

[0040] Figure 11 For the present invention Figure 10 The front view of;

[0041] Figure 12 The structural schematic diagram of the transition post of the present invention;

[0042] Figure 13 The cross-sectional view of the transition post of the present invention;

[0043] Figure 14 The structural schematic diagram of the clamping plate of the present invention;

[0044] Figure 15 The positional relationship diagram of the clamping plate and the transition post of the present invention;

[0045] Explanation of reference numerals:

[0046] 1. Feeding structure; 101. Support plate; 102. Roller; 103. Tray bottom plate; 104. Tray middle plate; 105. Tray top plate; 106. First through hole; 107. Second through hole; 108. Positioning groove; 109. Vertical plate; 110. Positioning cylinder; 111. Positioning block; 112. Blocking cylinder; 113. Partition board;

[0047] 2. Transfer structure; 201. Support frame; 202. X-axis linear slide; 203. Y-axis linear slide; 204. Z-axis linear slide; 205. Transfer plate; 206. Pneumatic gripper; 207. Clamping block; 208. Arc portion; 209. Projection tester;

[0048] 3. Engraving structure; 301. First sliding table; 302. Second sliding table; 303. Moving plate; 304. Engraving machine; 305. Rotary cylinder; 306. Angle plate; 307. Inductive sheet; 308. Side rail; 309. Photoelectric sensor; 310. Lock block; 311. Locking nut; 312. Pushing cylinder; 313. Pushing plate; 314. First push bar; 315. Slide rail; 316. Slide block; 317. Baffle; 318. Clamping plate; 319. Spring; 320. Second push bar; 321. Holding part; 322. Transition post; 323. Temporary storage groove; 324. Guide part; 325. Support plate; 326. Avoidance hole; 327. Holding groove. Detailed implementation manner

[0049] The present invention will be further described below with reference to the embodiments shown in the drawings.

[0050] As Figure 1 shown, it is a structural schematic diagram of the battery bottom marking device of the present invention. It is usually used to clamp a cylindrical battery, flip it 180° in the vertical direction, perform a marking process on the bottom of the battery, and complete the outer diameter detection of the cylindrical battery before marking, so as to determine the qualification rate of the battery.

[0051] The battery bottom marking device is composed of a feeding structure 1, a transfer structure 2, and an engraving structure 3. The feeding structure 1 is used to convey the cylindrical battery to be detected and marked; the transfer structure 2 is used to clamp the battery at the feeding structure 1 and complete the outer diameter detection of the cylindrical battery during the transfer process; the engraving structure 3 is used to receive the cylindrical battery transferred by the transfer structure 2 and flip the cylindrical battery 180° in the vertical direction to perform a marking process on the bottom of the battery.

[0052] As Figure 2 、 3 shown, it is a structural schematic diagram of the feeding structure 1. The feeding structure 1 is used to convey the cylindrical battery to be detected and marked. The feeding structure 1 includes a support plate 101, rollers 102, a tray, a positioning assembly, a blocking cylinder 112, and a partition plate 113. There are two support plates 101 arranged at intervals on the marking machine table. There are multiple groups of rollers 102 rotatably installed between the support plates 101. The tray with the cylindrical battery inserted is placed on the rollers 102, and the tray is driven to move forward by the rotation of the rollers 102.

[0053] The height of the support plate 101 is greater than the diameter of the roller 102. Therefore, when the roller 102 drives the tray to move forward, the part of the support plate 101 that is higher than the roller 102 can play a blocking role on both sides of the tray to prevent the tray from moving away from both sides when moving forward.

[0054] As Figure 4 、 5As shown in the figure, it is a schematic structural diagram of a tray. The tray includes a tray bottom plate 103, a tray middle plate 104, and a tray top plate 105. The tray middle plate 104 is integrally connected above the tray bottom plate 103, and the tray top plate 105 is integrally connected above the tray middle plate 104. There are gaps between the tray bottom plate 103 and the tray middle plate 104, and between the tray middle plate 104 and the tray top plate 105. On the one hand, it can save the material cost during processing, and on the other hand, it can reduce the overall weight of the tray, making it more labor-saving during the transportation by the roller 102 and facilitating subsequent positioning.

[0055] The first through hole 106 vertically penetrates the tray middle plate 104 and the tray top plate 105. The cylindrical battery to be marked is inserted into the first through hole 106. Under the limiting action of the two groups of first through holes 106 on the tray top plate 105 and the tray middle plate 104, the cylindrical battery always maintains a vertical state, which is convenient for the subsequent clamping of the transfer structure 2. If only one group of first through holes 106 is used for limiting, the cylindrical battery is prone to a slight inclination in the vertical direction. Even if the transfer structure 2 clamps the cylindrical battery at this position, it cannot be accurately inserted into the temporary storage slot 323.

[0056] The second through hole 107 is arranged on the tray bottom plate 103 and has a diameter smaller than that of the first through hole 106. The marked cylindrical battery is inserted into the tray of the blanking structure. The tray of the blanking structure has the same structure as the tray of the feeding structure 1. At this time, the bottom of the cylindrical battery has been marked. While the tray bottom plate 103 bears the cylindrical battery, the second through hole 107 can avoid the marked position at the bottom of the battery and prevent scratching the marked area.

[0057] The positioning component includes a positioning groove 108, a vertical plate 109, a positioning cylinder 110, and a positioning block 111. The positioning groove 108 is vertically opened on the outside of the tray. The positioning groove 108 cooperates with the positioning block 111 to complete the positioning of the tray. After placing the tray carrying the cylindrical battery on the roller 102, there is no need to distinguish the left and right sides of the tray, avoiding the extension of the marking cycle caused by the operator's misplacement operation.

[0058] The vertical plate 109 is fixed to the marking machine table by welding and is located on the same side as the support plate 101. The positioning cylinder 110 is fixed on the vertical plate 109 and is used to push the positioning block 111 to move inward. Until the positioning block 111 is inserted into the positioning groove 108, the positioning of the tray is completed.

[0059] The blocking cylinder 112 is fixed to the marking machine table. The partition plate 113 is connected to the blocking cylinder 112 and is located between two adjacent rollers 102. The roller 102 drives the tray carrying the cylindrical battery to move forward, and the blocking cylinder 112 drives the partition plate 113 to rise. The roller 102 stops rotating. At this time, the positioning block 111 moves inward to complete the positioning of the tray. As Figure 2As shown, when multiple trays are placed on the drum 102, the additionally provided partition 113 can be used to block the subsequent second tray. As Figure 6 Shown is a schematic structural diagram of the transfer structure 2. The transfer structure 2 is used to clamp the battery of the tray and complete the outer diameter detection of the cylindrical battery during the transfer process. The transfer structure 2 includes a support frame 201, an X-axis linear slide 202, a Y-axis linear slide 203, a Z-axis linear slide 204, a transfer plate 205, a pneumatic gripper 206, a clamping block 207, an arc portion 208, and a projection tester 209. The support frame 201 is fixed on the marking machine table and is erected above the loading structure 1. The X-axis linear slide 202 is distributed along the X-axis on the top of the support frame 201. The Y-axis linear slide 203 is fixed on the sliding portion of the X-axis linear slide 202 and is distributed along the Y-axis. The Z-axis linear slide 204 is fixed on the sliding portion of the Y-axis linear slide 203. The transfer plate 205 is fixed on the sliding portion of the Z-axis linear slide 204. Thus, under the drive of the X-axis linear slide 202, the Y-axis linear slide 203, and the Z-axis linear slide 204, the transfer plate 205 can move to any position in three axes, thereby realizing the clamping and transfer work of the cylindrical battery.

[0060] As Figure 7 Shown, the pneumatic gripper 206 is fixed to the bottom of the transfer plate 205 by a rotating motor. The pneumatic gripper 206 is used to clamp the cylindrical battery on the tray. The clamping block 207 is fixed to the inner side of the bottom of the pneumatic gripper 206. The arc portion 208 is provided on the inner side of the clamping block 207. When clamping the cylindrical battery, the pneumatic gripper 206 drives the two groups of clamping blocks 207 to move closer inward to clamp the cylindrical battery. During this period, the two groups of arc portions 208 hold on the outer side wall of the cylindrical battery to complete the clamping work of the cylindrical battery. By providing the arc portion 208, the contact area between the clamping block 207 and the cylindrical battery can be increased, so as to ensure that the cylindrical battery is clamped more stably while avoiding clamping marks on the surface of the battery.

[0061] There are two projection testers 209, which are fixed on the marking machine table and are arranged oppositely. After the pneumatic gripper 206 clamps the cylindrical battery on the tray, it moves between a group of projection testers 209. The pneumatic gripper 206 drives the cylindrical battery to rotate 360°. During this period, a group of projection testers 209 detect the outer diameter of the cylindrical battery at multiple places to determine whether it is a qualified product.

[0062] As Figure 8As shown in the figure, it is a schematic structural diagram of the engraving structure 3. The engraving structure 3 is used to receive the cylindrical battery transferred by the transfer structure 2, and flip the cylindrical battery 180° in the vertical direction for marking on the bottom of the battery. The engraving structure 3 includes a first slide table 301, a second slide table 302, a moving plate 303, an engraving machine 304, a rotary cylinder 305, an angle plate 306, an induction sheet 307, a side rail 308, a photoelectric sensor 309, a locking block 310, a locking nut 311 and a holding assembly.

[0063] The first slide table 301 is fixed on the marking machine table along the X-axis direction. The moving plate 303 is fixed on the sliding part of the first slide table 301, and the first slide table 301 drives the moving plate 303 to move along the X-axis direction. The induction sheet 307 is fixed at the bottom of the moving plate 303 and cooperates with the photoelectric sensor 309 to complete the positioning of the moving plate 303.

[0064] As Figure 9 shown, the side rail 308 is horizontally fixed on the side of the first slide table 301. The locking block 310 is slidably connected to the side rail 308. The locking nut 311 penetrates the locking block 310 and abuts against the side rail 308 to fix the position of the locking block 310. The photoelectric sensor 309 is fixed on the locking block 310. During actual marking, the position of the photoelectric sensor 309 can be adjusted by adjusting the position of the locking block 310 to improve the adaptability of the equipment.

[0065] The second slide table 302 is fixed on the support frame 201 along the Y-axis direction. The engraving machine 304 is fixed on the sliding part of the second slide table 302. The second slide table 302 drives the engraving machine 304 to move along the Y-axis to perform marking on the bottom of the cylindrical battery.

[0066] The rotary cylinder 305 is fixed on the top of the moving plate 303. The angle plate 306 is fixed on the rotating part of the rotary cylinder 305. The rotary cylinder 305 drives the angle plate 306 to rotate 180° in the vertical direction, so as to flip the cylindrical battery to the bottom side up, facilitating the engraving machine 304 to mark on the bottom of the cylindrical battery.

[0067] As Figure 10 、 11 shown, it is a schematic structural diagram of the holding assembly. The holding assembly is used to hold the cylindrical battery to prevent the battery from falling under the influence of its own gravity when flipping the cylindrical battery. The holding assembly includes a pushing cylinder 312, a pushing plate 313, a first pushing strip 314, a slide rail 315, a slider 316, a baffle 317, a clamping plate 318, a spring 319, a second pushing strip 320, a holding part 321, a transition post 322, a temporary storage groove 323, a guiding part 324, a support plate 325, an avoidance hole 326 and a holding groove 327.

[0068] The driving cylinder 312 is fixed on the top of the moving plate 303, and the pushing plate 313 is fixed on the moving part of the driving cylinder 312. The pushing plate 313 is driven to move by the driving cylinder 312. The first pushing bar 314 is fixedly arranged at intervals on the side of the pushing plate 313 away from the driving cylinder 312. Under the action of the driving cylinder 312, the first pushing bar 314 pushes the second pushing bar 320 forward until the holding part 321 is opened, facilitating the insertion of the cylindrical battery.

[0069] When the first pushing bar 314 retracts, under the action of the spring 319, the holding part 321 extends out to complete the holding of the cylindrical battery and prevent it from falling during subsequent rotation. As Figure 10 shown, there is a gap between two adjacent groups of the first pushing bars 314 to avoid the position of the transition post 322 when pushing the second pushing bar 320 forward.

[0070] The transition post 322 is embedded in the angle plate 306. The transfer structure 2 inserts the cylindrical battery after outer diameter measurement into the transition post 322, and the holding part 321 holds the cylindrical battery in the transition post 322 to prevent it from falling when the cylindrical battery is flipped. As Figure 12 、 13 shown, it is a schematic structural diagram of the transition post 322. A through temporary storage groove 323 is vertically arranged inside the transition post 322, and the diameter of the temporary storage groove 323 is equal to the outer diameter of the cylindrical battery. The transfer structure 2 inserts the cylindrical battery after outer diameter measurement into the temporary storage groove 323.

[0071] The support plate 325 is integrally connected to the bottom of the transition post 322. The avoidance hole 326 vertically penetrates the support plate 325 and is connected to the temporary storage groove 323, and the diameter of the avoidance hole 326 is smaller than that of the temporary storage groove 323. When the transfer structure 2 inserts the cylindrical battery after outer diameter measurement into the temporary storage groove 323, under the support of the support plate 325, the risk of the cylindrical battery falling out of the temporary storage groove 323 is avoided. When inserting the cylindrical battery, the support plate 325 can not only bear the cylindrical battery, but also complete the positioning of the cylindrical battery, ensuring that the position of each placed cylindrical battery is the same. During subsequent flipping and marking, it ensures that the distance between the engraving machine 304 and the bottom of the cylindrical battery is the same, so as to ensure that the marking effect is the same each time. Otherwise, different marking distances will lead to different marking effects, thus reducing the qualified rate of the finished product.

[0072] After the angle plate 306 drives the transition post 322 to flip 180°, the design of the avoidance hole 326 can also avoid the engraving path of the upper engraving machine 304, so as to ensure that the engraving machine 304 completes the marking process at the bottom of the cylindrical battery.

[0073] The guiding part 324 is inclined and arranged at the top of the temporary storage groove 323. When the transfer structure 2 inserts the cylindrical battery into the temporary storage groove 323, it plays a guiding role for the inserted cylindrical battery to ensure the smooth insertion of the cylindrical battery.

[0074] As Figure 15 shown, the holding groove 327 is opened on the side of the transition post 322 away from the push plate 313. From a top-down perspective, the holding groove 327 is a 180° ring (i.e., exactly half of the transition post 322). In this way, when holding the cylindrical battery, the effective contact surface of the temporary storage groove 323 contacts half of the outer wall of the cylindrical battery, while the holding part 321 contacts the other half of the outer wall of the cylindrical battery (that is, the temporary storage groove 323 and the holding part 321 each complete the holding of half of the cylindrical battery, which can not only ensure sufficient contact with the outer wall of the cylindrical battery and improve the holding effect; but also ensure that the holding forces on both sides of the cylindrical battery are the same, improve the balance of the cylindrical battery, and avoid skewing during subsequent marking).

[0075] If the holding groove 327 exceeds half of the transition post 322, regardless of the structure of the holding part 321, the contact area of the outer wall of the cylindrical battery will be reduced, thus reducing the holding effect.

[0076] If the holding groove is less than half of the transition post 322, if the effective contact surface of the transition post 322 remains unchanged, the contact area of the outer wall of the cylindrical battery will be reduced at this time, thus reducing the holding effect; if the contact surface of the transition post 322 increases, even if sufficient contact with the outer wall of the cylindrical battery is ensured at this time, it will cause the holding forces on both sides of the cylindrical battery to be inconsistent and unable to ensure the balance of the cylindrical battery.

[0077] As Figure 14 shown, it is a schematic structural diagram of the clamping plate 318. The clamping plate 318 is slidably connected to the angle plate 306 in a manner of cooperating with the slide rail 315 and the slider 316. The second push bar 320 is integrally connected to the side of the clamping plate 318 close to the push plate 313 and is used in cooperation with the first push bar 314. There is a gap between two adjacent groups of the second push bars 320 to avoid the position of the transition post 322 when holding the cylindrical battery. The first push bar 314 is pushed forward by the pushing cylinder 312 to push the second push bar 320 to open the holding part 321 for the convenient insertion of the cylindrical battery.

[0078] The holding part 321 is opened on the side of the clamping plate 318 close to the push plate 313 and is located between two adjacent groups of the second push bars 320. The holding part 321 is in a 180-degree ring shape and cooperates with the effective contact surface of the transition post 322. When the first push bar 314 is withdrawn, the holding part 321 extends out to complete the holding of the cylindrical battery and prevent it from falling during subsequent rotation.

[0079] The baffle 317 is fixed to the top of the angle plate 306. Spring grooves are provided on the facing sides of the baffle 317 and the clamping plate 318. The spring 319 is arranged in the spring groove. Under the action of the spring 319, the opening and clamping actions of the holding part 321 are realized.

[0080] The working principle of the battery bottom marking device of the present invention is as follows:

[0081] First, the roller 102 drives the tray carrying the cylindrical battery to move forward. The blocking cylinder 112 drives the partition 113 to rise, and the roller 102 stops rotating. At this time, the positioning cylinder 110 drives the positioning block 111 to extend and insert into the positioning groove 108 to complete the positioning of the tray.

[0082] After the pneumatic gripper 206 grabs the cylindrical battery on the tray, it moves between a group of projection testers 209. The pneumatic gripper 206 drives the cylindrical battery to rotate 360°. During this period, a group of projection testers 209 detect the outer diameter of the cylindrical battery at multiple places to determine whether it is a qualified product.

[0083] The first push bar 314 pushes the second push bar 320 forward under the action of the pushing cylinder 312 until the holding part 321 opens. After the pneumatic gripper 206 inserts the cylindrical battery into the temporary storage groove 323, the first push bar 314 resets. Under the action of the spring 319, the holding part 321 extends to complete the holding of the cylindrical battery; the rotating cylinder 305 drives the angle plate 306 to rotate vertically by 180°, making the bottom of the cylindrical battery face upward. Under the engraving action of the upper engraving machine 304, the engraving of the bottom of the cylindrical battery is completed.

[0084] Finally, it flips back. The other side of the engraving structure 3 is also provided with the same structures as the feeding structure 1 and the transfer structure 2 for the blanking and transfer of the finished product after marking.

[0085] The present invention also provides a battery bottom marking method, including the following steps:

[0086] S1. Convey the tray with the inserted battery through the roller line:

[0087] S2. The positioning of the tray is completed by the positioning component. Specifically, the positioning of the tray is realized through the cooperation of the positioning groove 108 and the positioning block 111.

[0088] S3. The battery positioned in step S2 is grabbed by the transfer structure, and its outer diameter is measured at multiple places by a group of projection testers 209.

[0089] S4. The transfer structure transfers the battery after the outer diameter measurement to the holding component, and the holding of the battery is completed by the holding component.

[0090] S5. The holding component flips to make the bottom of the battery face upward.

[0091] S6. The engraving machine performs bottom marking on the battery after flipping in step S5;

[0092] S7. The holding component flips the battery after bottom marking in step S6 and inserts it into the tray of the blanking structure to complete the blanking of the battery.

[0093] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly. It is not intended to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A battery bottom marking device, characterized in that, It includes: A loading structure (1), the loading structure (1) includes a roller conveyor, a tray placed on the top of the roller conveyor, and a positioning component arranged outside the roller conveyor and used for positioning the tray, and a battery is inserted into the tray; A transfer structure (2), the transfer structure (2) includes a support frame (201) erected above the roller conveyor, a transfer plate (205) arranged on the support frame (201) and movable along the X, Y, and Z axes, and a pneumatic gripper (206) fixed to the bottom of the transfer plate (205), and the pneumatic gripper (206) is used for gripping the battery on the tray; An engraving structure (3), the engraving structure (3) includes a moving plate (303) moving along the X axis, a gusset plate (306) rotatably installed on one side of the moving plate (303), a holding component arranged on the gusset plate (306) and used for holding the battery, and an engraving machine (304) moving along the Y axis, and the engraving machine (304) is used for marking the bottom of the battery; A blanking structure, the blanking structure is arranged on the other side of the engraving structure (3), and the blanking structure has the same structure as the loading structure (1) and is used for blanking after the bottom of the battery is marked; The holding component includes a transition column (322) embedded in the gusset plate (306), a temporary storage groove (323) vertically penetrating the transition column (322), a support plate (325) integrally connected to the bottom of the transition column (322), an avoidance hole (326) penetrating the support plate (325) and communicating with the temporary storage groove (323), a holding groove (327) opened on the outer side of the transition column (322), a clamping plate (318) elastically arranged on one side of the transition column (322), and a holding portion (321) opened on the side of the clamping plate (318) close to the transition column (322); After the battery is inserted into the temporary storage groove (323), the clamping plate (318) moves towards the transition column (322) until the holding portion (321) holds the outer wall of the battery; The holding component further includes a baffle plate (317) fixed to the top of the gusset plate (306), a spring (319) arranged between the baffle plate (317) and the clamping plate (318), a second push bar (320) integrally connected to one side of the clamping plate (318), a pushing cylinder (312) fixed to the top of the moving plate (303), a push plate (313) connected to the pushing cylinder (312), and a first push bar (314) integrally connected to one side of the push plate (313) and cooperating with the second push bar (320); The holding component further includes a guiding portion (324) inclinedly arranged at the top of the temporary storage groove (323), a slide rail (315) fixed to the top of the gusset plate (306), and a slider (316) slidably installed on the slide rail (315), and the clamping plate (318) is fixed to the slider (316).

2. The battery bottom marking device according to claim 1, characterized in that: The tray includes a tray bottom plate (103), a tray middle plate (104) integrally connected above the tray bottom plate (103), a tray top plate (105) integrally connected above the tray middle plate (104), a first through hole (106) passing through the tray top plate (105) and the tray middle plate (104), and a second through hole (107) passing through the tray bottom plate (103). The diameter of the first through hole (106) is larger than that of the second through hole (107), and the battery is inserted into the first through hole (106).

3. A battery bottom marking device according to claim 1, characterized in that: The positioning assembly includes a positioning groove (108) opened on the outer side of the tray and a positioning block (111) movably arranged on the top of the roller line. The positioning block (111) is inserted into the positioning groove (108) to complete the positioning of the tray.

4. A battery bottom marking device according to claim 1, characterized in that: The transfer structure (2) further includes a clamping block (207) fixed to the bottom of the pneumatic gripper (206), an arc portion (208) arranged on the inner side of the clamping block (207), and a projection tester (209) arranged on one side of the roller line and oppositely arranged. The pneumatic gripper (206) clamps the battery to between the projection testers (209) and drives the battery to rotate, so as to complete the outer diameter measurement of the battery.

5. The battery bottom marking device according to claim 1, characterized in that: The engraving structure (3) further includes a first slide table (301), a rotary cylinder (305) fixed to the top of the moving plate (303), a photoelectric sensor (309) adjustably arranged on one side of the first slide table (301), and an induction sheet (307) fixed to the bottom of the moving plate (303) and cooperating with the photoelectric sensor (309). The moving plate (303) is fixed on the first slide table (301), and the angle plate (306) is fixed on the rotary cylinder (305).

6. The battery bottom marking device according to claim 5, characterized in that: The engraving structure (3) further includes a side rail (308) fixed to one side of the first slide table (301), a locking block (310) slidably connected in the side rail (308), and a locking nut (311) passing through the locking block (310). The photoelectric sensor (309) is fixed on the locking block (310).

7. A method for bottom marking of a battery, using the battery bottom marking device according to any one of claims 1-6, comprising the following steps: S1. Convey the tray with the battery inserted through the roller line: S2. Complete the positioning of the tray by the positioning assembly; S3. The transfer structure clamps the battery positioned in step S2 and performs multiple outer diameter measurements on it; S4. The transfer structure transfers the battery after the outer diameter measurement to the holding assembly, and the holding assembly completes the holding of the battery; S5. The holding assembly flips to make the bottom of the battery face upward; S6. The engraving machine completes the bottom marking of the battery flipped in step S5; S7. The holding assembly flips the battery after the bottom marking in step S6, and the blanking structure completes the blanking of the battery.

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