Ultrathin battery negative electrode feeding device

Abstract

The utility model relates to the technical field of batteries, and discloses an ultrathin battery negative electrode feeding device which comprises a mounting base, and an unwinding mechanism, a first guide mechanism, a clamping mechanism, an adsorption mechanism, a cutting mechanism, a second guide mechanism and a winding mechanism which are mounted on the mounting base, the first guiding mechanism is used for guiding the unwound ultrathin battery negative electrode, the clamping mechanism is used for selectively clamping the ultrathin battery negative electrode guided by the first guiding mechanism, the cutting mechanism is located between the clamping mechanism and the adsorption mechanism, and the adsorption mechanism is used for adsorbing the ultrathin battery negative electrode or a negative electrode piece. The cutting mechanism is used for cutting the negative electrode of the ultrathin battery fixed by the clamping mechanism and the adsorption mechanism, the second guide mechanism is used for guiding the release paper, and the winding mechanism is used for winding the release paper. According to the utility model, the continuous and efficient feeding and cutting of the negative electrode of the ultrathin battery and the automatic recovery of the release paper can be realized, and the product yield can be improved.

Description

Technical Field

[0001] This utility model relates to the field of battery production and processing technology, and in particular to an ultra-thin battery negative electrode feeding device. Background Technology

[0002] Traditional battery negative electrode feeding devices include an unwinding mechanism, guide rollers, tension control device, feeding rollers, deviation correction device, cutting mechanism, winding mechanism, control system, and safety devices. Through the coordinated operation of these mechanisms, the negative electrode sheet is ensured to be stably and continuously fed into the cutting equipment. However, for ultra-thin battery negative electrodes, due to their extremely thin thickness and low mechanical strength, deformation, breakage, or wrinkling easily occurs during the feeding process. Using traditional battery negative electrode feeding devices, deformation, breakage, or wrinkling is prone to occur during feeding. Therefore, traditional battery negative electrode feeding devices are not suitable for ultra-thin battery negative electrodes. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide an ultra-thin battery negative electrode feeding device, which can realize continuous and efficient feeding, cutting and automatic recycling of release paper for ultra-thin battery negative electrodes, and improve product yield.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A feeding device for ultra-thin battery negative electrodes is provided, used for cutting ultra-thin battery negative electrodes to form negative electrode sheets and winding release paper separated from the ultra-thin battery negative electrodes. The feeding device includes a mounting base and an unwinding mechanism, a first guiding mechanism, a clamping mechanism, an adsorption mechanism, a cutting mechanism, a second guiding mechanism, and a winding mechanism mounted on the mounting base. The unwinding mechanism is used to unwind the ultra-thin battery negative electrodes. The first guiding mechanism is used to guide the unwound ultra-thin battery negative electrodes. The clamping mechanism is used to selectively clamp the ultra-thin battery negative electrodes guided by the first guiding mechanism. The cutting mechanism is located between the clamping mechanism and the adsorption mechanism. The adsorption mechanism is used to adsorb the ultra-thin battery negative electrodes or the negative electrode sheets. The cutting mechanism is used to cut the ultra-thin battery negative electrodes fixed by the clamping mechanism and the adsorption mechanism and located between the clamping mechanism and the adsorption mechanism. The second guiding mechanism is used to guide the release paper separated from the ultra-thin battery negative electrodes. The winding mechanism is used to wind the release paper guided by the second guiding mechanism.

[0006] As a further embodiment of the ultra-thin battery negative electrode feeding device, the mounting base has a first side and a second side arranged opposite to each other along its thickness direction. The clamping mechanism includes a first driving part and two clamping plates located on the first side. The first driving part is mounted on the mounting base and is pulsatorically connected to the two clamping plates. The ultra-thin battery negative electrode, after being guided by the first guiding mechanism, is located between the two clamping plates. The first driving part can drive the two clamping plates to clamp the ultra-thin battery negative electrode when the cutting mechanism cuts the negative electrode sheet.

[0007] As a further embodiment of the ultra-thin battery negative electrode feeding device, the cutting mechanism includes a second driving unit, a cutter located on the first side, and a base plate. The second driving unit is mounted on the mounting base and is connected to the cutter in a driving manner. The negative electrode sheet is located between the base plate and the cutter. The second driving unit can drive the cutter to move toward the direction close to the ultra-thin battery negative electrode, and the cutter can press the ultra-thin battery negative electrode against the base plate for cutting.

[0008] As a further embodiment of the ultra-thin battery negative electrode feeding device, a negative electrode sheet detection mechanism is also included. The negative electrode sheet detection mechanism is installed on the first side and adjacent to the adsorption mechanism. The adsorption mechanism includes a driving component and a suction cup located on the first side. The suction cup is located adjacent to the cutter. The driving component is installed on the mounting base and is drivenly connected to the suction cup. The driving component can drive the suction cup to adsorb the ultra-thin battery negative electrode or the negative electrode sheet and transfer the negative electrode sheet to the detection position.

[0009] As a further embodiment of the ultra-thin battery negative electrode feeding device, the driving assembly includes a third driving unit, a fourth driving unit, a fifth driving unit, a sixth driving unit, a first mounting base, a second mounting base, and a third mounting base. The third driving unit is mounted on the first mounting base and is drivenly connected to the suction cup. The third driving unit can drive the suction cup to move along a straight line towards or away from the ultra-thin battery negative electrode. The fourth driving unit is mounted on the second mounting base and is drivenly connected to the first mounting base. The fourth driving unit can drive the first mounting base to rotate towards the detection position. The fifth driving unit is mounted on the third mounting base and is drivenly connected to the second mounting base. The fifth driving unit can drive the second mounting base to move towards the detection position along a direction perpendicular to the first side. The sixth driving unit is mounted on the mounting base and is drivenly connected to the third mounting base. The sixth driving unit can drive the third mounting base to move towards the detection position along a direction parallel to the first side.

[0010] As a further embodiment of the ultra-thin battery negative electrode feeding device, the suction cup includes a connecting part and an adsorption part connected together. The connecting part is connected to the driving component. The adsorption part has a plurality of air holes spaced apart on one side along its thickness direction. The adsorption part has a connecting hole connected to an external vacuum device on the other side along its thickness direction. All the air holes are connected to the connecting hole. When the suction cup is in the suction position, the seat plate of the cutting mechanism extends to the air holes directly opposite the adsorption part.

[0011] As a further embodiment of the ultra-thin battery negative electrode feeding device, a tension adjustment mechanism is also included. The tension adjustment mechanism is mounted on the mounting base and adjacent to the first guide mechanism. The tension adjustment mechanism is used to adjust the tension of the ultra-thin battery negative electrode guided by the first guide mechanism.

[0012] As a further embodiment of the ultra-thin battery negative electrode feeding device, the tension adjustment mechanism includes a seventh drive unit, a bracket, and an adjustment roller mounted on the bracket. The seventh drive unit is mounted on the mounting base and is drively connected to the bracket. The seventh drive unit can drive the bracket to rotate. The adjustment roller is mounted on the bracket. The rotation axis of the bracket is parallel to the axis of the adjustment roller itself and perpendicular to the mounting base. The rotation axis of the bracket is offset from the axis of the adjustment roller itself. The ultra-thin battery negative electrode is in contact with the outer peripheral surface of the first guide mechanism and the adjustment roller.

[0013] As a further embodiment of the ultra-thin battery negative electrode feeding device, the first guiding mechanism includes a first guide roller and a second guide roller spaced apart on the mounting base, and an adjusting roller located between the first guide roller and the second guide roller. The unwound ultra-thin battery negative electrode contacts the outer peripheral surfaces of the first guide roller, the adjusting roller, and the second guide roller in sequence.

[0014] As a further embodiment of the ultra-thin battery negative electrode feeding device, the second guiding mechanism includes a third guide roller and a fourth guide roller spaced apart on the mounting base. The third guide roller is adjacent to the cutting mechanism, and the fourth guide roller is located between the third guide roller and the winding mechanism. The release paper, which is separated from the ultra-thin battery negative electrode, contacts the outer peripheral surfaces of the third guide roller and the fourth guide roller in sequence and is then wound onto the winding mechanism.

[0015] Beneficial effects: Through the coordinated operation of the unwinding mechanism, the first guiding mechanism, the clamping mechanism, the adsorption mechanism, the cutting mechanism, the second guiding mechanism, and the rewinding mechanism, this utility model can realize continuous and efficient feeding and cutting of ultra-thin battery negative electrodes, as well as automatic recycling of release paper, reducing manual intervention, improving production efficiency, and meeting the high-precision and high-efficiency production requirements of negative electrode sheets. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of the ultra-thin battery negative electrode feeding device described in this embodiment of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the assembly structure of the clamping mechanism, adsorption mechanism and cutting mechanism described in an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the suction cup structure described in an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the ultra-thin battery negative electrode feeding device described in this embodiment of the present invention. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the threading of the negative electrode / release paper according to an embodiment of the present invention.

[0022] In the picture:

[0023] 1. Negative electrode component; 11. Release paper;

[0024] 100. Mounting base; 101. First side; 102. Second side;

[0025] 200. Unwinding mechanism; 210. Eighth drive unit; 220. Unwinding roller;

[0026] 300. First guiding mechanism; 310. First guide roller; 320. Second guide roller;

[0027] 400. Clamping mechanism; 410. First drive unit; 420. Clamping plate;

[0028] 500, Adsorption mechanism; 510, Suction cup; 511, Connecting part; 512, Adsorption part; 5121, Air hole; 520, Third driving part; 530, Fourth driving part; 540, Fifth driving part; 550, Sixth driving part; 560, First mounting base; 570, Second mounting base;

[0029] 600. Cutting mechanism; 610. Second drive unit; 620. Cutting blade; 630. Seat plate; 6301. Groove;

[0030] 700. Second guide mechanism; 710. Third guide roller; 720. Fourth guide roller;

[0031] 800. Winding mechanism; 810. Ninth drive unit; 820. Winding roller;

[0032] 910. Detection mechanism; 920. Tension adjustment mechanism; 921. Seventh drive unit; 922. Support; 923. Adjustment roller. Detailed Implementation

[0033] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationships shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are merely used for distinction in description and have no special meaning.

[0037] like Figures 1 to 5As shown, this embodiment provides an ultra-thin battery negative electrode feeding device for cutting ultra-thin battery negative electrodes to form negative electrode sheets and winding up release paper 11 separated from the ultra-thin battery negative electrodes. The ultra-thin battery negative electrode feeding device includes a mounting base 100 and an unwinding mechanism 200, a first guiding mechanism 300, a clamping mechanism 400, an adsorption mechanism 500, a cutting mechanism 600, a second guiding mechanism 700, and a winding mechanism 800 mounted on the mounting base 100. The unwinding mechanism 200 is used to unwind the ultra-thin battery negative electrodes, the first guiding mechanism 300 is used to guide the unwound ultra-thin battery negative electrodes, and the clamping mechanism 400 is used to... The system selectively clamps the ultra-thin battery negative electrode after it has been guided by the first guiding mechanism 300. The cutting mechanism 600 is located between the clamping mechanism 400 and the adsorption mechanism 500. The adsorption mechanism 500 is used to adsorb the ultra-thin battery negative electrode or negative electrode sheet and transfer it to the detection position. The cutting mechanism 600 is used to cut the ultra-thin battery negative electrode that has been fixed by the clamping mechanism 400 and the adsorption mechanism 500 and is located between the clamping mechanism 400 and the adsorption mechanism 500. The second guiding mechanism 700 is used to guide the release paper 11 after it has been separated from the ultra-thin battery negative electrode. The winding mechanism 800 is used to wind up the release paper 11 after it has been guided by the second guiding mechanism 700.

[0038] In this embodiment, both the ultra-thin battery negative electrode wound on the unwinding mechanism 200 and one side of the ultra-thin battery negative electrode passing through the clamping mechanism 400 are attached with release paper 11 (for ease of description, the ultra-thin battery negative electrode with release paper 11 attached is referred to as negative electrode 1). After passing through the clamping mechanism 400, the release paper 11 separates from the ultra-thin battery negative electrode. The release paper 11 is guided by the second guiding mechanism 700 and then wound up and recycled by the winding mechanism 800. The ultra-thin battery negative electrode separated from the release paper 11 passes through the cutting mechanism 600 and is adsorbed and fixed by the adsorption mechanism 500 located at the suction position (adjacent to the cutting mechanism 600 and close to the ultra-thin battery negative electrode for adsorption and fixation). At this time, the cutting mechanism 600 can cut the fixed ultra-thin battery negative electrode to form a negative electrode sheet. The adsorption mechanism 500 adsorbs the negative electrode sheet and transfers it to the detection position (the position for detecting whether the negative electrode sheet is qualified) for detection. Then the adsorption mechanism 500 moves back to the suction position. After cutting, the clamping mechanism 400 opens, and the winding mechanism 800 drives the ultra-thin battery negative electrode 1, which is attached to the release paper 11, to the suction position of the adsorption mechanism 500. At this time, the clamping mechanism 400 clamps the negative electrode 1 again, and the adsorption mechanism 500 adsorbs and fixes the ultra-thin battery negative electrode again. The cutting mechanism 600 cuts the ultra-thin battery negative electrode again, and so on.

[0039] Understandably, after being unwound, the negative electrode 1 passes through the clamping mechanism 400 after being guided by the first guiding mechanism 300. The clamping mechanism 400 and the adsorption mechanism 500 fix it in place, ensuring the stability of the ultra-thin battery negative electrode during the cutting process. This prevents displacement or deformation during cutting, improves the cutting accuracy of the negative electrode sheet, and thus increases product yield. The first guiding mechanism 300 accurately guides the negative electrode 1, reducing friction and stress concentration during feeding. The second guiding mechanism 700 precisely guides the release paper 11 and rewinds it through the winding mechanism 800, preventing the release paper 11 from deviating or curling, ensuring neat winding, improving the release paper 11 recycling efficiency, reducing material waste, and lowering production costs.

[0040] In the ultra-thin battery negative electrode feeding device of this embodiment, through the coordinated work of the unwinding mechanism 200, the first guiding mechanism 300, the clamping mechanism 400, the adsorption mechanism 500, the cutting mechanism 600, the second guiding mechanism 700 and the winding mechanism 800, continuous and efficient feeding and cutting of ultra-thin battery negative electrodes and automatic recycling of release paper 11 can be achieved, reducing manual intervention, improving production efficiency, and meeting the high-precision and high-efficiency production requirements of negative electrode sheets.

[0041] Furthermore, such as Figure 1 and Figure 4 As shown, the mounting base 100 has a first side surface 101 and a second side surface 102 disposed opposite to each other along its thickness direction, as... Figure 2 As shown, the clamping mechanism 400 includes a first driving part 410 and two clamping plates 420 located on the first side 101. The first driving part 410 is mounted on the mounting base 100 and is connected to the two clamping plates 420 in a transmission manner. The negative electrode 1, after being guided by the first guiding mechanism 300, is located between the two clamping plates 420. The first driving part 410 can drive the two clamping plates 420 to clamp the negative electrode 1 when the cutting mechanism 600 cuts the negative electrode sheet.

[0042] In this embodiment, the negative electrode 1, after being guided by the first guiding mechanism 300, enters the clamping area between the two clamping plates 420. When the cutting mechanism 600 needs to cut the ultra-thin battery negative electrode, the first driving unit 410 drives the two clamping plates 420 to close, clamping the negative electrode 1. The clamping force is precisely controlled by the first driving unit 410 to ensure that the negative electrode remains stable during the cutting process, improving cutting accuracy. After cutting is completed, the first driving unit 410 drives the two clamping plates 420 to open, releasing the negative electrode for the next feeding and cutting. In this embodiment, the design of the clamping mechanism 400 fully considers the characteristics of the ultra-thin battery negative electrode, avoiding material damage or cutting failure due to excessive or insufficient clamping force. The clamping mechanism 400 works in conjunction with the cutting mechanism 600, the adsorption mechanism 500, etc., to achieve automated feeding and cutting, improving production efficiency. The clamping mechanism 400 is installed on the first side 101 of the mounting base 100, with a compact structure, saving space and facilitating integration with other components.

[0043] For example, the first drive unit 410 is a cylinder, and the connection structure between the cylinder and the two clamping plates 420 is a conventional technology in the art. For example, one clamping plate 420 is fixed on, and the other clamping plate 420 is drivenly connected to the cylinder to realize the opening and closing of the two clamping plates 420. The specific details will not be elaborated further. In other embodiments, the first drive unit 410 may also be a hydraulic cylinder or a motor, etc.

[0044] Furthermore, such as Figure 2 As shown, the cutting mechanism 600 includes a second drive unit 610, a cutter 620 located on the first side 101, and a base plate 630. The second drive unit 610 is mounted on the mounting base 100 and is connected to the cutter 620 in a transmission manner. The negative electrode sheet is located between the base plate 630 and the cutter 620. The second drive unit 610 can drive the cutter 620 to move toward the direction close to the negative electrode of the ultra-thin battery. The cutter 620 can press the negative electrode of the ultra-thin battery against the base plate 630 for cutting.

[0045] After the unwinding mechanism 200 releases the negative electrode component 1, it travels through the first guide mechanism 300 to the clamping mechanism 400. The clamping mechanism 400 secures the negative electrode component 1, preparing it for cutting. The second drive unit 610 is activated, driving the cutter 620 to move closer to the ultra-thin battery negative electrode. The cutter 620 presses the ultra-thin battery negative electrode against the base plate 630, applying sufficient pressure to ensure cutting stability. The cutter 620 performs the cutting action, forming the desired negative electrode sheet shape. After cutting, the adsorption mechanism 500 transfers the negative electrode sheet to the detection position for further processing. This cutting mechanism 600, through precise drive and fixing mechanisms, ensures that the cutting process of the ultra-thin battery negative electrode is efficient and accurate, meeting production requirements.

[0046] Optionally, the second drive unit 610 in this embodiment is a cylinder. In other embodiments, a hydraulic cylinder or an electric motor can also be selected, which will not be described in detail here.

[0047] Preferably, the length of the cutting edge of the cutter 620 extends in a direction perpendicular to the mounting base 100 (Z direction in the figure). A groove 6301 is formed on the base plate 630, directly opposite the cutting edge. The length of the groove 6301 extends in a direction perpendicular to the first side surface 101 (Z square in the figure). When the cutter 620 cuts the ultra-thin battery negative electrode, the ultra-thin battery negative electrode is pressed firmly against the groove 6301 to facilitate cutting. The groove 6301 is relatively shallow, preferably to avoid affecting the cutting quality of the negative electrode sheet; further details are omitted.

[0048] Furthermore, the ultra-thin battery negative electrode feeding device also includes a detection mechanism 910. The detection mechanism 910 is installed on the first side 101 and adjacent to the adsorption mechanism 500. The adsorption mechanism 500 includes a driving component and a suction cup 510 located on the first side 101. The suction cup 510 is disposed adjacent to the cutter 620. The driving component is installed on the mounting base 100 and is connected to the suction cup 510 in a transmission manner. The driving component can drive the suction cup 510 to adsorb the ultra-thin battery negative electrode or negative electrode sheet and transfer the cut negative electrode sheet to the detection position.

[0049] The adsorption mechanism 500, through the coordinated design of the suction cup 510 and the drive assembly, ensures the stability of the negative electrode sheet during the transfer process. The detection mechanism 910 can perform high-precision detection on the cut negative electrode sheet, and the detection results of the detection mechanism 910 can be fed back to the control system in real time to adjust the cutting parameters, thereby improving cutting accuracy and product quality. In this embodiment, the automated design of the adsorption mechanism 500 and the detection mechanism 910 enables continuous operation of cutting, adsorption, transfer, and detection, improving production efficiency.

[0050] The structure and working principle of the testing agency 910 are conventional technologies in this field, and will not be described in detail here.

[0051] Further, the driving assembly includes a third driving unit 520, a fourth driving unit 530, a fifth driving unit 540, a sixth driving unit 550, a first mounting base 560, a second mounting base 570, and a third mounting base (not shown in the figure). The third driving unit 520 is mounted on the first mounting base 560 and is drivenly connected to the suction cup 510. The third driving unit 520 can drive the suction cup 510 to move in a straight line toward or away from the negative electrode of the ultra-thin battery. The fourth driving unit 530 is mounted on the second mounting base 570 and is drivenly connected to the first mounting base 560. The fourth driving unit 530 can drive the first mounting base 560 to rotate toward the detection position. The fifth driving unit 540 is mounted on the third mounting base and is drivenly connected to the second mounting base 570. The fifth driving unit 540 can drive the second mounting base 570 to move toward the detection position in a direction perpendicular to the first side surface 101. The sixth driving unit 550 is mounted on the mounting base 100 and is drivenly connected to the third mounting base. The sixth driving unit 550 can drive the third mounting base to move toward the detection position in a direction parallel to the first side surface 101. This embodiment solves problems such as multi-degree-of-freedom control, transfer stability, detection alignment, production efficiency, and equipment flexibility in the transfer and testing process of negative electrode sheets through a structural design with multiple drive units and multiple mounting bases, ensuring the accuracy of negative electrode sheet transfer and testing.

[0052] For example, the third drive unit 520 is a cylinder that can drive the suction cup 510 to reciprocate along the X direction (the X direction is perpendicular to the Z direction) as shown in the figure. The fourth drive unit 530 is a motor that can drive the first mounting base 560 to rotate the third drive unit 520 and the suction cup 510 90° from the suction position to the position where the negative electrode sheet adsorbed by the suction cup 510 faces the detection position, or rotate 90° from the detection position to the suction position. The fifth drive unit 540 and the sixth drive unit 550 are both motors. The fifth drive unit 540 can drive the second mounting base 570 to move the fourth drive unit 530, the first mounting base 560 and the third drive unit 520 together along the Z direction as shown in the figure. The sixth drive unit 550 can drive the third mounting base to move the fifth drive unit 540, the second mounting base 570, the fourth drive unit 530, the first mounting base 560 and the third drive unit 520 together along the X direction as shown in the figure. In other embodiments, the third drive unit 520 is not limited to a cylinder, but may also be a motor; the fourth drive unit 530, the fifth drive unit 540 and the sixth drive unit 550 are also not limited to motors, but may also be cylinders or a combination of cylinder and gear assembly, and will not be described in detail here.

[0053] In this embodiment, a guide structure is also provided for the linear drive of the motor, such as a structure in which the guide rail and the slider cooperate, which will not be described in detail here.

[0054] like Figure 3As shown, the suction cup 510 includes a connecting part 511 and an adsorption part 512 connected to each other. The connecting part 511 is connected to the drive assembly. The adsorption part 512 has a plurality of air holes 5121 spaced apart on one side along its thickness direction. The adsorption part 512 has a connecting hole (not shown in the figure) connected to an external vacuum device on the other side along its thickness direction. All the air holes 5121 are connected to the connecting hole. When the suction cup 510 is in the suction position, the seat plate 630 of the cutting mechanism 600 extends to the air holes 5121 directly opposite the adsorption part 512.

[0055] Specifically, the third driving unit 520 drives the suction cup 510 to move towards the ultra-thin battery negative electrode directly opposite it, until the suction part 512 of the suction cup 510 abuts the ultra-thin battery negative electrode against the base plate 630, which is equivalent to clamping and fixing the ultra-thin battery negative electrode again. At the same time, by utilizing the suction effect of the suction part 512 and the cooperative work of the clamping mechanism 400, the ultra-thin battery negative electrode between the clamping mechanism 400 and the suction mechanism 500 can be fixed. At this time, when the cutter 620 cuts the ultra-thin battery negative electrode, it can prevent the ultra-thin battery negative electrode from moving. After the cutting is completed, the suction part 512 adsorbs the negative electrode sheet and transfers it to the detection position through the fourth driving unit 530, the fifth driving unit 540 and the sixth driving unit 550. When the vacuum device stops working, the suction part 512 releases the negative electrode sheet at the detection position, and the detection mechanism 910 performs detection.

[0056] Furthermore, the uniform distribution of pores 5121 can improve the adsorption stability of the negative electrode.

[0057] Furthermore, the ultra-thin battery negative electrode feeding device of this embodiment also includes a tension adjustment mechanism 920. The tension adjustment mechanism 920 is mounted on the mounting base 100 and adjacent to the first guide mechanism 300. The tension adjustment mechanism 920 is used to adjust the tension of the negative electrode 1 guided by the first guide mechanism 300. Through the adjustment action of the tension adjustment mechanism 920, the tension of the negative electrode 1 can be adjusted to avoid the phenomenon of deviation, wrinkling or curling due to insufficient tension of the negative electrode 1; at the same time, it avoids the ultra-thin battery negative electrode breaking due to excessive tension.

[0058] Furthermore, such as Figure 1 and Figure 4 As shown, the tension adjustment mechanism 920 includes a seventh drive unit 921, a bracket 922, and an adjustment roller 923 mounted on the bracket 922. The seventh drive unit 921 is mounted on the mounting base 100 and is connected to the bracket 922 in a transmission manner. The seventh drive unit 921 can drive the bracket 922 to rotate. The adjustment roller 923 is mounted on the bracket 922. The rotation axis of the bracket 922 is parallel to the axis of the adjustment roller 923 and perpendicular to the mounting base 100. The rotation axis of the bracket 922 is offset from the axis of the adjustment roller 923. The negative electrode 1 is in contact with the outer peripheral surface of the first guide mechanism 300 and the adjustment roller 923.

[0059] In this embodiment, the rotation axis of the bracket 922 is parallel to and offset from the axis of the adjusting roller 923, forming an eccentric structure. This allows the bracket 922 to generate a roller position offset of 0.2-0.5 mm for every 1° rotation (the specific value depends on the eccentricity). Therefore, by driving the bracket 922 to rotate through the seventh drive unit 921, the adjusting roller 923 can be displaced, which can effectively achieve tension adjustment of the negative electrode 1.

[0060] Optionally, the seventh drive unit 921 can be a power source, either a motor or a cylinder. The linear / rotational motion of the motor or cylinder is used to control the angle of the bracket 922 via a conversion mechanism (gear set, connecting rod).

[0061] Furthermore, the first guiding mechanism 300 includes a first guide roller 310 and a second guide roller 320 spaced apart on the mounting base 100. An adjusting roller 923 is located between the first guide roller 310 and the second guide roller 320. The unwound negative electrode 1 contacts the outer peripheral surfaces of the first guide roller 310, the adjusting roller 923, and the second guide roller 320 in sequence. In this embodiment, the line connecting the axes of the first guide roller 310 and the second guide roller 320 is offset from the axis of the adjusting roller 923, so that the adjusting roller 923 forms an eccentric mounting structure relative to the first guide roller 310 and the second guide roller 320. That is, the first guide roller 310, the adjusting roller 923, and the second guide roller 320 form a three-roller linkage to adjust the tension. That is, after the ultra-thin battery negative electrode is guided by the first guide roller 310, the tension is adjusted by the tension adjusting mechanism 920, and then guided by the second guide roller 320, so that the negative electrode 1 held by the subsequent clamping mechanism 400 remains flat. The angle range of the triangle formed by the three rollers can be adjusted according to the actual situation.

[0062] In this embodiment, the tension (contact pressure) detection can be performed using conventional techniques in this technical field, which will not be described in detail here.

[0063] For example, the second guiding mechanism 700 includes a third guide roller 710 and a fourth guide roller 720 spaced apart on the mounting base 100. The third guide roller 710 is adjacent to the cutting mechanism 600, and the fourth guide roller 720 is located between the third guide roller 710 and the winding mechanism 800. The release paper 11, which is separated from the negative electrode of the ultra-thin battery, contacts the outer peripheral surfaces of the third guide roller 710 and the fourth guide roller 720 in sequence and is then wound onto the winding mechanism 800.

[0064] After the cutting mechanism 600 cuts the ultra-thin battery negative electrode, the release paper 11 separates from the ultra-thin battery negative electrode. The separated release paper 11 first contacts the outer circumferential surface of the third guide roller 710, which guides it towards the winding mechanism 800. Subsequently, it contacts the outer circumferential surface of the fourth guide roller 720, further adjusting its direction of movement to ensure smooth winding onto the winding mechanism 800, thus completing the recovery of the release paper 11. This embodiment, by setting the third guide roller 710 and the fourth guide roller 720, can prevent the release paper 11 from deviating during separation and winding, ensuring smooth operation of the release paper 11 during winding.

[0065] The unwinding mechanism 200 includes an eighth drive unit 210 and an unwinding roller 220. The eighth drive unit 210 is mounted on the second side 102 of the mounting base 100, and the unwinding roller 220 is mounted on the first side 101 of the mounting base 100. The eighth drive unit 210 is a motor, and the output end of the motor passes through the mounting base 100 and is connected to the unwinding roller 220 for transmission.

[0066] The winding mechanism 800 includes a ninth drive unit 810 and a winding roller 820. The ninth drive unit 810 is mounted on the second side 102 of the mounting base 100, and the winding roller 820 is mounted on the first side 101 of the mounting base 100. The ninth drive unit 810 is a motor, and the output end of the motor passes through the mounting base 100 and is connected to the winding roller 820 for transmission.

[0067] like Figure 1 and Figure 5 As shown, after the negative electrode 1 is unwound by the unwinding roller 220, it is guided by the first guide roller 310, and the tension is adjusted by the adjusting roller 923. Then it is guided by the second guide roller 320 to the clamping mechanism 400. The cutting mechanism 600 cuts the ultra-thin battery negative electrode with the help of the clamping mechanism 400 and the adsorption mechanism 500, thereby completing the cutting of the ultra-thin battery negative electrode. The release paper 11 separated from the ultra-thin battery negative electrode is guided by the third guide roller 710 and the fourth guide roller 720 to the winding roller 820, thereby completing the recycling of the release paper 11.

[0068] In the above embodiments, each drive unit and detection mechanism 910 is connected to the controller, thereby realizing the automatic control of the ultra-thin battery negative electrode feeding device.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An ultra-thin battery negative electrode feeding device for cutting an ultra-thin battery negative electrode to form a negative electrode sheet and winding release paper separated from the ultra-thin battery negative electrode, characterized by, The ultra-thin battery negative electrode feeding device comprises a mounting base and a unwinding mechanism, a first guiding mechanism, a clamping mechanism, a suction mechanism, a cutting mechanism, a second guiding mechanism and a winding mechanism mounted on the mounting base, the unwinding mechanism is used for unwinding the ultra-thin battery negative electrode, the first guiding mechanism is used for guiding the unwound ultra-thin battery negative electrode, the clamping mechanism is used for selectively clamping the ultra-thin battery negative electrode guided by the first guiding mechanism, the cutting mechanism is located between the clamping mechanism and the suction mechanism, the suction mechanism is used for suctioning the ultra-thin battery negative electrode or the negative electrode sheet, the cutting mechanism is used for cutting the ultra-thin battery negative electrode fixed by the clamping mechanism and the suction mechanism and located between the clamping mechanism and the suction mechanism, the second guiding mechanism is used for guiding the release paper separated from the ultra-thin battery negative electrode, and the winding mechanism is used for winding the release paper guided by the second guiding mechanism.

2. The ultra-thin battery anode feed device of claim 1, wherein, The mounting base has a first side surface and a second side surface arranged opposite to each other along the thickness direction thereof, the clamping mechanism comprises a first driving part and two clamping plates located on the first side surface, the first driving part is mounted on the mounting base and in transmission connection with the two clamping plates, the ultra-thin battery negative electrode guided by the first guiding mechanism is located between the two clamping plates, and the first driving part can drive the two clamping plates to clamp the ultra-thin battery negative electrode when the cutting mechanism cuts the negative electrode sheet.

3. The ultra-thin battery anode feed device of claim 2, wherein, The cutting mechanism comprises a second driving part, a cutter and a seat plate located on the first side surface, the second driving part is mounted on the mounting base and in transmission connection with the cutter, the negative electrode sheet is located between the seat plate and the cutter, and the second driving part can drive the cutter to move towards the direction close to the ultra-thin battery negative electrode, and the cutter can cut the ultra-thin battery negative electrode against the seat plate.

4. The ultra-thin battery anode feed device of claim 3, wherein, Further comprising a negative electrode sheet detection mechanism, the negative electrode sheet detection mechanism is mounted on the first side surface and adjacent to the suction mechanism, the suction mechanism comprises a driving assembly and a suction disc located on the first side surface, the suction disc is arranged adjacent to the cutter, the driving assembly is mounted on the mounting base and in transmission connection with the suction disc, and the driving assembly can drive the suction disc to suction the ultra-thin battery negative electrode or the negative electrode sheet and transfer the negative electrode sheet to a detection position.

5. The ultra-thin battery anode feed device of claim 4, wherein, The driving assembly comprises a third driving part, a fourth driving part, a fifth driving part, a sixth driving part, a first mounting seat, a second mounting seat and a third mounting seat, the third driving part is mounted on the first mounting seat and in transmission connection with the suction disc, the third driving part can drive the suction disc to move along a straight line towards the direction of approaching or moving away from the ultra-thin battery negative electrode; the fourth driving part is mounted on the second mounting seat and in transmission connection with the first mounting seat, the fourth driving part can drive the first mounting seat to rotate to the detection position; the fifth driving part is mounted on the third mounting seat and in transmission connection with the second mounting seat, the fifth driving part can drive the second mounting seat to move along a direction perpendicular to the first side surface towards the detection position; the sixth driving part is mounted on the mounting base and in transmission connection with the third mounting seat, the sixth driving part can drive the third mounting seat to move along a direction parallel to the first side surface towards the detection position.

6. The ultra-thin battery anode feed device of claim 4, wherein, The suction disc comprises a connecting part and a suction part connected with each other, the connecting part is in transmission connection with the driving assembly, a plurality of air holes are arranged at one side of the suction part along the thickness direction of the suction part, the other side of the suction part along the thickness direction is provided with a connecting hole connected with an external vacuum device, all the air holes are in communication with the connecting hole, when the suction disc is located at the suction position, the seat plate of the cutting mechanism extends to be opposite to the air holes of the suction part.

7. The ultra-thin battery anode feeding device according to any one of claims 1 to 6, characterized in that, Further comprising a tension adjusting mechanism, the tension adjusting mechanism is mounted on the mounting base and adjacent to the first guide mechanism, the tension adjusting mechanism is used for adjusting the tension of the ultra-thin battery negative electrode guided by the first guide mechanism.

8. The ultra-thin battery anode feedstock device of claim 7, wherein, The tension adjusting mechanism comprises a seventh driving part, a bracket and an adjusting roller mounted on the bracket, the seventh driving part is mounted on the mounting base and in transmission connection with the bracket, the seventh driving part can drive the bracket to rotate, the adjusting roller is mounted on the bracket, the rotation axis of the bracket is parallel to the axis of the adjusting roller itself and perpendicular to the mounting base, and the rotation axis of the bracket is staggered with the axis of the adjusting roller itself, the ultra-thin battery negative electrode is in contact with the outer circumferential surface of the first guide mechanism and the adjusting roller.

9. The ultra-thin battery anode feedstock device of claim 8, wherein, The first guide mechanism comprises a first guide roller and a second guide roller which are spaced apart and mounted on the mounting base, the adjusting roller is located between the first guide roller and the second guide roller, the unwound ultra-thin battery negative electrode is in contact with the outer circumferential surface of the first guide roller, the adjusting roller and the second guide roller in sequence.

10. The ultra-thin battery anode feeding device according to any one of claims 1 to 6, characterized in that, The second guide mechanism comprises a third guide roller and a fourth guide roller which are spaced apart and mounted on the mounting base, the third guide roller is adjacent to the cutting mechanism, the fourth guide roller is located between the third guide roller and the winding mechanism, the release paper separated from the ultra-thin battery negative electrode is in contact with the outer circumferential surface of the third guide roller and the fourth guide roller in sequence and then wound on the winding mechanism.

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