Negative electrode sheet cutting device

Abstract

The utility model discloses a kind of negative pole piece cutting device, including machine table, support mechanism is sequentially arranged on the machine table, roller group mechanism, transmission mechanism, cutting mechanism and discharge mechanism, the support mechanism includes the support plate of being set to the front end of machine table, the support plate is provided with the support camber for supporting and guiding negative pole tape, the support plate front end is arranged with the partition post that multiple passages are separated, each passage spaced out by the partition post is respectively correspondingly provided with incoming material inductor.The utility model uses the conveying mode that negative pole piece material belt naturally falls, and setting support mechanism supports negative pole piece material belt, sets up partition post and divides multiple independent passages to each roll negative pole piece material belt is separately transmitted, then be tensioned by roller group mechanism, prevent material belt to be too loose, when incoming material inductor loses response, it shows that conveying mechanism speed is too fast, needs to be adjusted to reduce conveying mechanism speed in time.

Description

Technical Field

[0001] This utility model relates to the field of battery electrode processing technology, and in particular to a negative electrode cutting device. Background Technology

[0002] The negative electrode sheet of a wound battery is mainly in the form of a strip. It is manufactured by cutting a predetermined length from a whole roll of negative electrode sheet material. The negative electrode sheet is characterized by its thinness and narrow width, making it prone to deformation during production and affecting subsequent use. Especially during the conveying of the whole roll of negative electrode sheet, the cutting operation is necessary, and the drive mechanism at the rear end driving the negative electrode sheet is difficult to synchronize with the drive mechanism at the front end. If it is pulled too tight, it can easily damage the negative electrode sheet. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a negative electrode cutting device.

[0004] To achieve the above objectives, a negative electrode sheet cutting device includes a machine base. The machine base is sequentially provided with a support mechanism, a roller group mechanism, a transmission mechanism, a cutting mechanism, and a discharge mechanism. The support mechanism includes a support plate disposed at the front end of the machine base. The support plate is provided with a support arc surface for supporting and guiding the negative electrode strip. The front end of the support plate is arranged with partition columns that divide multiple channels. Each channel separated by the partition columns is respectively provided with a material inlet sensor.

[0005] To prevent damage caused by excessive tension in the negative electrode sheet conveyor belt due to inconsistent conveying speeds, this invention employs a natural hanging conveying method for the negative electrode sheet conveyor belt. A support mechanism is installed to support the negative electrode sheet conveyor belt, with a support arc surface for guiding and supporting the negative electrode sheet conveyor belt. Separating columns are used to divide the negative electrode sheet conveyor belt into multiple independent channels for individual transmission of each roll of negative electrode sheet conveyor belt. The belt is then tensioned by a roller assembly to prevent it from becoming too loose. The conveyor belt is then transmitted to a cutting mechanism for cutting by a transmission mechanism, and finally discharged by a discharge mechanism. Each channel of the support plate is equipped with an incoming material sensor that constantly detects incoming material. When the incoming material sensor loses its detection, it indicates that the conveyor speed is too fast, the negative electrode sheet conveyor belt is being pulled up, and it is over-tensioned, requiring timely adjustment to reduce the conveyor speed.

[0006] Preferably, the roller assembly includes at least one rotating shaft rotatably mounted on the machine base, with multiple rotating sleeves fixed on the rotating shaft. The rotating sleeves have protrusions at both ends to create a restriction zone in the middle that corresponds to the width of the negative electrode strip.

[0007] The roller assembly mechanism is used to tension the negative electrode strip. The negative electrode strip is placed on the rotating sleeve and limited by the restriction zone. It can pre-tighten the negative electrode strip to a certain extent without over-tightening and damaging it.

[0008] Preferably, the transmission mechanism includes multiple sets of transmission components, each corresponding to a rotating sleeve. Each transmission component includes a transmission frame, on which are mounted driven wheels and driving wheels that are vertically aligned and rotatable. The driving wheel is connected to a drive motor that drives its rotation, and the driven wheel is connected to a lifting cylinder that drives its lifting and lowering.

[0009] The transmission mechanism uses a lifting cylinder to drive the driven wheel to press the negative electrode sheet material strip onto the driving wheel, and uses a drive motor to drive the negative electrode sheet material strip to be conveyed stably.

[0010] Preferably, the transmission frame is provided with a liftable transmission seat, the lifting cylinder drives the transmission seat to rise and fall, the driven wheel is provided on the transmission seat, and the transmission seat is provided with a compression spring that drives the driven wheel downward.

[0011] Considering that the negative electrode strip is not suitable for excessive compression, the driven wheel is made movable. The driven wheel is driven by the compression spring to compress the negative electrode strip, which can ensure that the driven wheel compresses the negative electrode strip without causing excessive pressure and damage to the strip.

[0012] Preferably, the cutting mechanism includes multiple sets of cutting components, each of which corresponds to a transmission component. Each cutting component includes a cutting bracket and a cutting seat that can be lifted and lowered on the cutting bracket. The cutting seat is connected to a cutting cylinder that drives it to lift and lower. The cutting seat is provided with an upper cutting blade, and a reference seat is provided below the cutting seat. The reference seat is provided with a lower cutting blade that corresponds to the upper cutting blade and forms a shearing action.

[0013] Preferably, the cutting support is provided with a liftable pressure block at the front end of the upper cutter. The pressure block is movably connected to the cutting support through at least one vertically upward guide rod, and a buffer spring is sleeved on the guide rod between the pressure block and the cutting support.

[0014] Preferably, the discharge mechanism includes a conveyor belt and a servo motor that drives the conveyor belt to operate. Multiple partitions are arranged side by side above the conveyor belt, and the partitions divide the conveyor belt into multiple channels that correspond one-to-one with the cutting components.

[0015] Preferably, it includes a receiving groove disposed at the front end of the support plate.

[0016] Considering that the negative electrode sheet strip may droop excessively at the support arc surface when the conveying mechanism is at a slow conveying speed, a receiving groove is set to prevent the negative electrode sheet strip from contacting the ground.

[0017] Compared with the prior art, the beneficial effects of this utility model are: To prevent damage caused by excessive tension in the negative electrode sheet conveyor belt due to inconsistent conveying speeds, this invention employs a natural hanging conveying method for the negative electrode sheet conveyor belt. A support mechanism is installed to support and guide the negative electrode sheet conveyor belt, and dividing columns create multiple independent channels for individual conveying of each roll of negative electrode sheet conveyor belt. The belt is then tensioned by a roller assembly to prevent it from becoming too loose. A transmission mechanism then transmits the belt to a cutting mechanism for cutting, and finally, a discharge mechanism discharges the belt. Each channel of the support plate is equipped with an incoming material sensor that constantly monitors incoming material. When an incoming material sensor loses its sensitivity, it indicates that the conveying mechanism is moving too fast, causing the negative electrode sheet conveyor belt to be pulled up and over-tensioned, requiring timely adjustment to reduce the conveying mechanism speed. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the embodiments will be briefly introduced below.

[0019] Figure 1 This is a top view of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of this utility model.

[0021] Figure 3 This is a partial structural schematic diagram of the present invention.

[0022] Figure 4 This is a partial structural schematic diagram of the present invention.

[0023] Figure 5 This is a schematic diagram of the transmission component structure of this utility model.

[0024] Figure 6 This is a partial exploded view of the transmission component of this utility model.

[0025] Figure 7 This is a schematic diagram of the cutting component structure of this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0027] This utility model provides a negative electrode sheet cutting device, such as... Figures 1-5As shown, the machine includes a machine base 100, on which a support mechanism 1, a roller assembly mechanism 2, a transmission mechanism 3, a cutting mechanism 4, and a discharge mechanism 5 are sequentially arranged. The front end of the support mechanism 1 is provided with a receiving groove 6. The support mechanism 1 includes a support plate 11 disposed at the front end of the machine base 100. The support plate 11 is provided with a support arc surface 12 for supporting and guiding the negative electrode strip. The front end of the support plate 11 is arranged with partition columns 13 that divide multiple channels. Each channel separated by the partition columns 13 is respectively provided with a material receiving sensor 14. The negative electrode sheet material is conveyed from the outside to the support mechanism 1. The support mechanism 1 is equipped with dividing columns 13 to separate multiple independent channels, each channel corresponding to one negative electrode sheet material. Considering the fragile nature of the negative electrode sheet material, a support plate 11 with a supporting arc surface 12 is provided for support. The negative electrode sheet material falls normally, and the part near the machine 100 is supported by the supporting arc surface 12. A material sensor 14 is set in each channel to detect the passage of the negative electrode sheet material at all times. When the speed of the subsequent transmission mechanism 3 is too fast, the material sensor 14 will not detect the presence of the negative electrode sheet material as it rises, which can provide an early warning or feed the signal back to the control center to reduce and adjust the transmission speed of the transmission mechanism 3 to avoid damage caused by excessive tension of the negative electrode sheet material. The receiving groove 6 is used to support the negative electrode sheet material and prevent it from falling to the bottom when the negative electrode sheet material is conveyed too slowly.

[0028] The roller assembly 2 includes at least one rotating shaft 21 rotatably mounted on the machine base 100. Multiple rotating sleeves 22 are fixed to the rotating shaft 21. The rotating sleeves 22 have protrusions at both ends, creating a restriction zone 23 in the middle corresponding to the width of the negative electrode strip. Considering the fragile nature of the negative electrode strip and the need for a certain degree of tension, the rotating shaft 21 is provided. The negative electrode strip passes through the restriction zone 23 and continues to be conveyed forward. It is important to note that regardless of the number of rotating shafts 21, the negative electrode strip must be conveyed from above the rotating sleeves 22; an S-shaped winding tensioning method cannot be used to avoid tearing due to excessive tension.

[0029] The transmission mechanism 3 includes multiple sets of transmission components 31, each corresponding to a rotating sleeve 22. Each transmission component 31 includes a transmission frame 32, on which are vertically aligned and rotatable driven wheels 33 and driving wheels 34. The driving wheel 34 is connected to a drive motor 35, which can be used to drive its rotation. The connection between the driving wheel 34 and the drive motor 35 can be implemented using any existing technology. The driven wheel 33 is connected to a lifting cylinder 36, which drives its lifting and lowering. The lifting cylinder 36 drives the driven wheel 33 to press the negative electrode sheet material onto the driving wheel 34. The drive motor 35 drives the driving wheel 34 to rotate for transmission. To avoid the impact of different speeds on some negative electrode sheet materials, multiple sets of transmission components 31 are used for transmission, with each set of transmission components 31 corresponding to one set of negative electrode sheet materials. Considering that the driven wheel 33 should not press the negative electrode strip too tightly, a liftable transmission seat 37 is provided on the transmission frame 32. The lifting cylinder 35 drives the transmission seat 37 to rise and fall, and the driven wheel 33 is mounted on the transmission seat 37. The transmission seat 37 is equipped with a compression spring 38 that drives the driven wheel 33 downward. When the driven wheel 33 presses down, the compression spring 38 provides the driven wheel 33 with a certain floating space, ensuring that the driven wheel 33 can press the negative electrode strip tightly onto the driving wheel 34 without over-pressing and damaging the negative electrode strip.

[0030] The cutting mechanism 4 includes multiple cutting components 41, each corresponding to a transmission component 31. Each cutting component 41 includes a cutting bracket 42 and a cutting seat 43 that is vertically mounted on the cutting bracket 42. The cutting seat 43 is connected to a cutting cylinder 44 that drives its lifting and lowering. The cutting seat 43 is equipped with an upper cutting blade 431, and a reference seat 44 is located below it. The reference seat 44 is equipped with a lower cutting blade 441 that corresponds to the upper cutting blade 431 and forms a cutting motion. To ensure stable cutting operation of the upper cutting blade 431, the cutting bracket 42 is equipped with multiple sets of vertically downward sliding rails 45. Slider blocks 46 are matched to the sliding rails 45 and are fixedly connected to the cutting seat 43. The multiple sets of sliding rails 45 guide the upper cutting blade 431 to ensure stable cutting along a predetermined path.

[0031] The cutting bracket 42 is provided with a liftable pressure block 47 at the front end of the upper cutter 431. The pressure block 47 is movably connected to the cutting support 43 through at least one vertically upward guide rod 48. A buffer spring 49 is sleeved on the guide rod 48 between the pressure block 47 and the cutting support 43.

[0032] The discharge mechanism 5 includes a conveyor belt (not shown in the figure) and a servo motor (not shown in the figure) that drives the conveyor belt. Multiple partitions 51 are arranged side-by-side above the conveyor belt, dividing it into multiple channels that correspond one-to-one with the cutting components 41. The cutting mechanism 4 is located above one end of the conveyor belt. After cutting, the material is conveyed by the conveyor belt. Multiple partitions 51 divide the conveyor belt into multiple channels, each corresponding to a cutting mechanism 41. The discharge mechanism 5 also has a discharge sensor (not shown in the figure) at the output end of the conveyor belt to detect the cut negative electrode sheet material, which is then picked up by the next processing equipment.

[0033] Working principle: The negative electrode sheet material falls naturally onto the supporting arc surface 12 and passes through the restriction area 23 of the rotating sleeve 22. It is then conveyed by the transmission mechanism 3. The front end of the support plate 11 is provided with a receiving groove 6 to prevent the negative electrode sheet material from falling to the ground due to slow conveying. The support plate 11 is divided into multiple independent channels by multiple dividing columns 13. Each independent channel corresponds to a group of negative electrode sheet materials, enabling simultaneous processing of multiple groups. Each independent channel is tensioned by the rotating sleeves 22 arranged behind it. Each channel of the support plate 11 is also provided with a material inlet sensor 14 to detect whether the speed of the material conveyed by the subsequent transmission mechanism 3 is too fast. When the material inlet sensor 14 does not detect material inlet, it is considered that the transmission mechanism is not in operation. If the transmission speed of mechanism 3 is too fast, it needs to be adjusted and reduced in time. The transmission mechanism 3 presses the negative electrode strip onto the driving wheel 34 through the driven wheel 33, and drives the negative electrode strip to be conveyed by the drive motor 35. The cutting mechanism 4 is equipped with a pressure block 47 connected by a buffer spring 49. When the negative electrode strip is cut, it is pre-tightened by the pressure block 47. Then, the upper cutter 431 cooperates with the lower cutter 441 to cut the negative electrode strip to prevent misalignment during cutting. Finally, the servo motor drives the conveyor belt to transport the cut negative electrode strip. When it is transported to the end of the conveyor belt stroke, the discharge sensor is triggered to remind that the material has arrived, and any existing subsequent process can pick up the material.

[0034] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A negative electrode sheet cutting device, characterized in that, The machine includes a machine base, on which a support mechanism, a roller assembly mechanism, a transmission mechanism, a cutting mechanism, and a discharge mechanism are sequentially arranged. The support mechanism includes a support plate located at the front end of the machine base. The support plate has a support arc surface for supporting and guiding the negative electrode strip. The front end of the support plate is arranged with partition columns that divide multiple channels. Each channel separated by the partition columns is respectively equipped with a material receiving sensor.

2. The negative electrode sheet cutting device according to claim 1, characterized in that, The roller assembly includes at least one rotating shaft rotatably mounted on the machine base, with multiple rotating sleeves fixed on the rotating shaft. The rotating sleeves have protrusions at both ends, creating a restriction zone in the middle that corresponds to the width of the negative electrode band.

3. The negative electrode sheet cutting device according to claim 1, characterized in that, The transmission mechanism includes multiple sets of transmission components, each corresponding to a rotating sleeve. Each transmission component includes a transmission frame, on which are mounted driven wheels and driving wheels that are rotatable and correspond to each other. The driving wheel is connected to a drive motor that drives its operation, and the driven wheel is connected to a lifting cylinder that drives its lifting and lowering.

4. The negative electrode sheet cutting device according to claim 3, characterized in that, The transmission frame is equipped with a liftable transmission seat, the lifting cylinder drives the transmission seat to rise and fall, the driven wheel is mounted on the transmission seat, and the transmission seat is equipped with a compression spring that drives the driven wheel downward.

5. The negative electrode sheet cutting device according to claim 1, characterized in that, The cutting mechanism includes multiple cutting components, each corresponding to a transmission component. Each cutting component includes a cutting bracket and a cutting seat that can be raised and lowered on the cutting bracket. The cutting seat is connected to a cutting cylinder that drives its raising and lowering. The cutting seat is provided with an upper cutting blade, and a reference seat is provided below the cutting seat. The reference seat is provided with a lower cutting blade that corresponds to the upper cutting blade and forms a shearing action.

6. The negative electrode sheet cutting device according to claim 5, characterized in that, The cutting bracket has a liftable pressure block at the front end of the upper cutter. The pressure block is movably connected to the cutting support through at least one vertically upward guide rod. A buffer spring is sleeved on the guide rod between the pressure block and the cutting support.

7. The negative electrode sheet cutting device according to claim 1, characterized in that, The discharge mechanism includes a conveyor belt and a servo motor that drives the conveyor belt to operate. Multiple partitions are arranged side by side above the conveyor belt, and the partitions divide the conveyor belt into multiple channels that correspond one-to-one with the cutting components.

8. The negative electrode sheet cutting device according to claim 1, characterized in that, This includes a receiving groove located at the front end of the support plate.

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