Automatic rejecting equipment for defective pole pieces

Abstract

The utility model relates to the technical field of lithium battery production, and particularly discloses automatic rejecting equipment for defective pole pieces. Comprising a movable butt joint mechanism, the movable butt joint mechanism comprises a positioning unit and a first driving unit, the positioning unit is used for fixing a first pole segment located on the upstream after cutting, and the first driving unit drives the positioning unit to move back and forth between a first position and a second position; the fixed docking mechanism is arranged at the downstream of the movable docking mechanism and is used for fixing the second pole segment which is positioned at the downstream after being cut off; the cutting mechanism comprises a first cutter and a second cutter and is used for cutting the defect sections of the pole pieces on the movable butt joint mechanism and the fixed butt joint mechanism; and the positioning unit drives the first pole segment at the first position to the second position and is in butt joint with the second pole segment. The utility model has the following technical effects: the defective pole piece is automatically removed, and the quality of a terminal battery is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery production, and particularly relates to an automatic rejection device for defective pole pieces. Background Art

[0002] The coating step is particularly crucial in the lithium battery electrode production process. During the coating process, unqualified products such as hollow foil, single-sided electrodes, and large defective sections can occur. However, these electrodes cannot be directly rolled, as this would compromise the quality of the final battery.

[0003] The existing solution is usually to avoid the roller gap of the electrode, that is, to adjust the size of the roller gap between the two pressure rollers. Unqualified electrode sheets that pass through the roller gap avoidance will be sent to a special diversion area for unified processing. This method will increase the difficulty of electrode preparation, consume production time, and if handled improperly, it will also affect the quality of the terminal battery. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the utility model provides an automatic rejection device for defective electrodes.

[0005] The technical effects to be achieved by the present invention are achieved through the following technical aspects:

[0006] Provide a device for automatically rejecting defective electrodes, including

[0007] The movable docking mechanism includes a positioning unit and a first driving unit, wherein the positioning unit is used to fix the first pole segment located upstream after being cut, and the first driving unit drives the positioning unit to move back and forth between a first position and a second position;

[0008] A fixed docking mechanism, disposed downstream of the movable docking mechanism, for fixing the second pole segment located downstream after being cut off;

[0009] A cutting mechanism, the cutting mechanism comprising a first cutter and a second cutter, one side of each of the first cutter and the second cutter being transmission-connected to a cutter driving member, the first cutter being disposed on the positioning unit, and the second cutter being disposed on the fixed docking mechanism;

[0010] A device is provided on one side of the movable docking mechanism and / or the fixed docking mechanism along the electrode sheet running direction, so as to be used for cutting defective sections of the electrode sheets on the movable docking mechanism and the fixed docking mechanism;

[0011] The positioning unit drives the first pole segment located at the first position to the second position and docks the first pole segment with the second pole segment.

[0012] In some embodiments, the positioning unit includes a docking plate, a pressure rod, and a pressure rod driving member;

[0013] The first driving unit is in transmission connection with the docking plate. The pressing rod is arranged on one side of the docking plate, and the pressing rod driving member is in transmission connection with the pressing rod to drive the pressing rod to approach or move away from the docking plate.

[0014] In some embodiments, a waste collection box for receiving the defective section of the pole piece is arranged between the movable docking mechanism and the fixed docking mechanism.

[0015] In some embodiments, a movable roller and a fixed roller are arranged between the movable docking mechanism and the fixed docking mechanism;

[0016] The fixed roller is arranged on one side of the waste collection box. The movable roller is arranged opposite to the fixed roller, and the movable roller can approach or move away from the fixed roller to guide the defective section of the pole piece into the waste collection box.

[0017] In some embodiments, a guide plate is further arranged on one side of the positioning unit close to the waste collection box to guide the defective section of the pole piece into the waste collection box.

[0018] In some embodiments, the movable docking mechanism further includes a pair of clamping rollers for clamping the pole piece, and the pair of clamping rollers are arranged on the side of the positioning unit away from the fixed docking mechanism.

[0019] In some embodiments, a second driving unit is further included. The second driving unit is in transmission connection with the pair of clamping rollers to enable the clamping rollers to move back and forth between a first position and a second position.

[0020] In some embodiments, a pasting machine for connecting the first pole piece segment and the second pole piece segment is further arranged on one side of the fixed docking mechanism.

[0021] In some embodiments, a sensor for detecting defective pole pieces is arranged on the side of the movable docking mechanism facing away from the fixed docking mechanism.

[0022] In some embodiments, a detection component is further arranged on the movable docking mechanism and the fixed docking mechanism to detect the gap between the docking ends of the first pole piece segment and the second pole piece segment.

[0023] In summary, the present utility model has the following beneficial effects:

[0024] The utility model can realize the automatic rejection function of the pole piece by setting the movable docking mechanism, the fixed docking mechanism and the cutting mechanism to cooperate with each other. Among them, the pole piece passes through the movable docking mechanism and the fixed docking mechanism along the tape running direction, and the cutting mechanism can cut off the defective section between the movable docking mechanism and the fixed docking mechanism through the first cutter and the second cutter. The positioning unit and the fixed docking mechanism fix the first pole piece segment and the second pole piece segment after cutting to prevent them from falling off due to gravity. After cutting, the movable docking mechanism moves the first pole piece segment from the first position to the second position to coincide with the second pole piece segment on the fixed docking mechanism, and then joins the tape to complete the automatic waste rejection process of the pole piece.

[0025] This device can automatically reject the pole piece. Compared with the existing roll gap avoidance treatment, this method is simple to operate and has high efficiency. It can finely cut the defective pole piece to prevent waste caused by cutting the good pole piece during the waste rejection process. At the same time, it can also adapt to large sections of defective pole pieces. After cutting one end and continuously running the tape, the large sections of defective pole pieces can be automatically rejected, completing the rejection of the pole piece during the pole piece transmission process, saving time and improving the quality of the terminal battery. Brief Description of the Drawings

[0026] Figure 1 It is a schematic diagram of an automatic defective pole piece rejection device in a form of an embodiment of the present application.

[0027] Figure 2 It is a structural schematic diagram of an automatic defective pole piece rejection device in another form of an embodiment of the present application.

[0028] Figure 3 It is a top view of an automatic defective pole piece rejection device in another form of an embodiment of the present application.

[0029] Figure 4 In an embodiment of the present application Figure 3 The cross-sectional view taken along line B-B.

[0030] Figure 5 In an embodiment of the present application Figure 4 The enlarged view at position A.

[0031] Figure 6 In an embodiment of the present application Figure 3 The cross-sectional view taken along line A-A.

[0032] Figure 7 It is a schematic diagram of an automatic defective pole piece rejection device in a form of an embodiment of the present application in the first state.

[0033] Figure 8 It is a schematic diagram of an automatic defective pole piece rejection device in a form of an embodiment of the present application in the second state.

[0034] Markings in the figure:

[0035] 100, electrode;

[0036] 1, movable docking mechanism; 110, positioning unit, 111, docking plate; 112, pressure bar;

[0037] 120, first driving unit;

[0038] 2, fixed docking mechanism;

[0039] 3, cutting mechanism; 310, first cutting knife, 320, second cutting knife;

[0040] 4, waste collection box;

[0041] 5, movable roller; 6, fixed roller; 7, guide plate; 8, clamping roller; 9, rubber pasting machine;

[0042] 10, color mark sensor; 11, fiber optic sensor; 12, detection component; 13, second driving unit. Specific implementation mode

[0043] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The described embodiments are some, but not all, of the embodiments of the present utility model.

[0044] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0045] Embodiment 1

[0046] This embodiment provides an automatic defective electrode removing device, which can automatically cut off defective segments such as empty foils, single-sided foils, and double-layer electrodes, improving production efficiency. As Figure 1-2As shown, the movable docking mechanism 1 includes a positioning unit 110 and a first driving unit 120. The positioning unit 110 is used to fix the first pole segment located upstream after cutting. The first driving unit 120 drives the positioning unit 110 to move back and forth between a first position and a second position. The fixed docking mechanism 2 is arranged downstream of the movable docking mechanism 1 and is used to fix the second pole segment located downstream after being cut. The cutting mechanism 3 is arranged on one side of the movable docking mechanism 1 and / or the fixed docking mechanism 2 along the pole strip running direction to cut the defective segments of the pole on the movable docking mechanism 1 and the fixed docking mechanism 2. Among them, the positioning unit 110 drives the first pole segment at the first position to the second position and docks with the second pole segment.

[0047] Specifically, the movable docking mechanism 1 and the fixed docking mechanism 2 cooperate to automatically dock the two ends of the cut pole 100. The positioning unit 110 is used to support and fix the pole 100, which can be a combination of a suction block, a docking plate 111 and a pressing rod 112, etc. The fixed docking mechanism 2 can include another positioning unit 110, which can be a suction block. By using the vacuum suction of the suction block, or a combination design such as a docking plate 111, a pressing rod 112 and a robotic arm, the pole 100 is fixed by pressing the pressing rod 112 with the robotic arm. The movable docking mechanism 1 and the fixed docking mechanism 2 are arranged along the running direction of the pole 100. In the normal state, there is a gap between them. The purpose of leaving the gap is to remove the defective pole from the gap. The removal method can also be to use devices such as clamping jaws and robotic arms to clamp the defective segment of the pole. After the removal is completed, the first driving unit 120 will drive the positioning unit 110 to move so that the positioning unit 110 abuts against the fixed docking mechanism 2 to dock the first pole segment and the second pole segment. It can be understood that the first driving unit 120 can be designed in various ways such as a cylinder, a combination of a motor and a lead screw guide rail, etc. This embodiment does not limit this, as long as it can drive the positioning unit 110 to move. In some embodiments, the first driving unit 120 includes a driving cylinder, a connecting plate and a guide rail. The positioning unit 110 is arranged on the connecting plate. One side of the connecting plate is connected to the driving cylinder, and the other side is movably connected to the guide rail for guiding.

[0048] It can be understood that the first position and the second position respectively correspond to the initial position and the tape receiving position of the movable docking mechanism 11. Among them, when the positioning unit 110 is at the initial position, there is a gap between the movable docking mechanism 1 and the fixed docking mechanism 2. When the positioning unit is at the tape receiving position, the movable docking mechanism 1 abuts against the fixed docking mechanism 2, so that the first pole segment and the second pole segment can be smoothly docked for subsequent tape connection.

[0049] The cutting mechanism 3 includes a first cutter 310 and a second cutter 320, and one side of the first cutter 310 and the second cutter 320 is connected to a cutter drive member. The first cutter 310 is arranged on the positioning unit 110, and the second cutter 320 is arranged on the fixed docking mechanism 2. This arrangement is highly efficient, occupies a small space, and has a low failure rate. At the same time, through subsequent cooperation with sensors and other mechanisms, an automated cutting action can be achieved. A cutter drive member is provided to drive the cutter to cut the electrode 100. The cutter drive member can be a drive device such as a cylinder, which drives the cutter to move back and forth, thereby achieving the cutting of the electrode 100.

[0050] Among them, the cutter can be a double-edged transverse cutter, an up-and-down moving beveled blade cutter, a rolling disc cutter, etc., and the specific selection criteria are set according to the actual situation. For example, a double-edged transverse cutter can save space and make the equipment more concise. When a double-edged transverse cutter is used to cut the pole piece 100, the cutter is moved from the transmission side to the operating side by the cutter drive part to complete one-time cutting of the strip. There is no need to reset the next cutting. The double-edged cutter can be moved from the operating side to the transmission side. When a cutter with an up-and-down moving beveled blade is used to cut the pole piece 100, the high-speed cylinder of the cutter pushes the beveled blade cutter downward, and the high-speed cylinder can complete the cutting and resetting action by reciprocating once. When a rolling disc cutter is used, the cross section of the pole piece 100 is relatively flat due to horizontal rolling cutting.

[0051] During use of this embodiment, the electrode 100 passes through the positioning unit 110 and the fixed docking mechanism 2 in sequence along the direction of the tape. When it is detected that the electrode 100 passing through has empty foil or defects, the entire machine slows down. At this time, the fixed docking mechanism 2 fixes the electrode 100, and the second cutter 320 cuts the electrode 100 on the fixed docking mechanism 2. After the cutting, one end of the electrode is fixed by the fixed docking mechanism 2 to form a second electrode segment, and the other end moves down to the gap between the movable docking mechanism 1 and the fixed docking mechanism 2 by gravity to remove the defective segment. When it is observed that the defective segment has been removed, the positioning unit 110 fixes the electrode, and the first cutter 310 cuts the electrode on the positioning unit 110. The defective segment is removed, and the electrode segment fixed by the positioning unit 110 is the first electrode segment. Subsequently, the positioning unit 110 is driven by the first driving unit 120 to dock with the fixed docking mechanism 2, and the pole piece continues to be conveyed during the external coating, rolling and other processes so that the first pole segment and the second pole segment overlap. At this time, the pole piece on the positioning unit 110 stops moving and the pole piece is connected.

[0052] This embodiment can realize the automatic rejection function of the electrode 100 by setting up a movable docking mechanism 1, a fixed docking mechanism 2 and a cutting mechanism 3 to cooperate with each other. Among them, the electrode 100 passes through the movable docking mechanism 1 and the fixed docking mechanism 2 along the belt direction, and the cutting mechanism 3 can cut off the defective segments on the movable docking mechanism 1 and the fixed docking mechanism 2. The positioning unit 110 and the fixed docking mechanism 2 fix the cut electrode segments to prevent them from falling off due to gravity. After the cutting is completed, the movable docking mechanism 1 moves the first electrode segment from the first position to the second position, overlaps it with the second electrode segment on the fixed docking mechanism 2, and connects the tape to complete the automatic rejection process of the electrode. This device can automatically reject the electrode. Compared with the existing roller gap avoidance process, this method is simple to operate and has high efficiency. It can complete the rejection of the electrode during the electrode transmission process, saving time, and will not cause problems of improper handling or incomplete rejection, thereby improving the quality of the terminal battery.

[0053] Example 2

[0054] The difference between Example 2 and Example 1 is that this example further optimizes the automatic rejection device for defective electrodes, such as Figure 1-6 As shown, preferably, the positioning unit 110 includes a docking plate 111, a first pressure rod 112 and a first pressure rod driving member; the first driving unit 120 is transmission-connected to the docking plate 111, the first pressure rod 112 is arranged on one side of the docking plate 111, and the first pressure rod driving member is transmission-connected to the first pressure rod 112 to drive the first pressure rod 112 toward or away from the docking plate 111.

[0055] For example, the fixed docking mechanism 2 may also include a docking plate, a second pressure rod, and a second pressure rod driver to secure the pole piece. The second pressure rod driver drives the second pressure rod to secure and compress the pole piece on the docking plate, cooperating with the cutter to perform the cutting action. The second pressure rod driver may be a cylinder, a motor plus a ball screw, or the like.

[0056] Preferably, the docking plate 111 included in the positioning unit 110 is a first docking plate, on which a first cutter 310 is provided, and the docking plate included in the fixed docking mechanism 2 is a second docking plate, on which a second cutter 320 is provided. The cutter on the first docking plate divides the surface on which it is located into a first area and a second area, with the first area being away from the second docking plate and the second area being close to the second docking plate; the cutter on the second docking plate divides the surface on which it is located into a third area and a fourth area, with the third area being close to the first docking plate and the fourth area being away from the first docking plate. The position of the fixed pole piece of the movable docking mechanism 1 is in the second area, and the position of the fixed pole piece of the fixed docking mechanism 2 is in the fourth area. This setting method can improve the efficiency of rejecting defective pole pieces and improve the operating stability of the equipment.

[0057] In some embodiments, a waste collection box 4 for receiving the defective section of the pole piece is provided between the movable docking mechanism 1 and the fixed docking mechanism 2. By providing the waste collection box 4, the cut pole pieces can be recycled to keep the working station clean.

[0058] In some embodiments, please refer to Figure 7 , a movable roller 5 and a fixed roller 6 are provided between the movable docking mechanism 1 and the fixed docking mechanism 2. The fixed roller 6 is arranged on one side of the waste collection box 4. The movable roller 5 is arranged opposite to the fixed roller 6, and the movable roller 5 can move closer to or away from the fixed roller 6 to guide the defective section of the pole piece into the waste collection box 4. The movable roller 5 and the fixed roller 6 are used to guide the pole piece so that the pole piece can smoothly enter the waste collection box 4. The movable roller 5 is drivingly connected to a movable roller 5 driving member. The movable roller 5 driving member can be a cylinder, a combination of a motor and a lead screw guide rail, etc., and can drive the movable roller 5 to move towards the fixed roller 6. A motor is drivingly connected to the fixed roller 6, and the fixed roller 6 is driven to rotate by the motor. In the non-working state, there is a gap between the movable roller 5 and the working roller, which does not affect the running of the pole piece. In the working state, the movable roller 5 is driven by the movable roller 5 driving member to move towards the fixed roller 6. At this time, the pole piece is pressed down onto the fixed roller 6, and the motor drives the fixed roller 6 to rotate to guide the pole piece into the waste collection box 4.

[0059] In some embodiments, a guide plate 7 is further provided on the side of the positioning unit 110 close to the waste collection box 4 to guide the defective section of the pole piece into the waste collection box 4. Among them, the guide plate 7 preferably has a certain curvature, one end of which is connected to the first docking plate, and the other end extends to the vicinity of the waste collection box 4.

[0060] The movable docking mechanism 1 further includes a pair of clamping rollers 8 for clamping the pole piece. The pair of clamping rollers 8 are arranged on the side of the positioning unit 110 away from the fixed docking mechanism 2. Among them, a gap for the pole piece to pass through is left between one clamping roller 8 and the other clamping roller 8. A driving motor is drivingly connected to the clamping roller 8 to drive the clamping roller 8 to rotate. When the motor drives the clamping roller 8 to rotate, the clamping roller 8 drives the pole piece to move. When the clamping roller 8 stops rotating, it is in the clamping state to fix the pole piece. The clamping roller 8 is arranged on one side of the positioning unit 110, and the pole piece first passes through the clamping roller 8 and then enters the positioning unit 110. By providing the clamping roller 8, the pole piece can be further fixed to prevent it from moving during the subsequent cutting process, and at the same time, the movement of the pole piece can be accurately controlled according to the rotation of the clamping roller 8.

[0061] It further includes a second driving unit, which is drivingly connected to a pair of clamping rollers 8 so that the clamping rollers 8 can move back and forth between a first position and a second position. The second driving unit can be a motor plus a lead screw guide rail, a cylinder, etc., used to drive the horizontal movement of the clamping rollers 8. When the fixing unit moves for docking, the clamping rollers 8 move synchronously with the fixing unit to drive the pole piece to move, improving the stability during the docking process and keeping the pole piece relatively fixed. Exemplarily, the second driving unit is the same as the first driving unit 120, including a driving cylinder, a connecting plate, and a guide rail. One end of the connecting plate is connected to the driving cylinder, and the other end is movably arranged on the guide rail. The clamping rollers 8 are arranged on one side of the connecting plate, and the first docking plate is arranged on the other side of the clamping rollers 8.

[0062] In some embodiments, as Figure 8 shown, a pasting machine 9 for pasting the connecting tape of the first pole piece segment and the second pole piece segment is further provided on one side of the fixed docking mechanism 2. A driving component can be arranged on the pasting machine 9, and the driving component is a cylinder or a servo module, etc., driving the pasting machine 9 to approach the pole piece for connecting tape processing of the pole piece. The pasting machine 9 pastes a single-sided adhesive tape. The single-sided adhesive tape has strong adhesiveness, is not easy to peel off from the pole piece, and has good pressure resistance. Compared with the existing pressing process or using an adhesive plate for docking, it can directly pass through the active roller for rolling, and can withstand a large pressure.

[0063] Embodiment 3

[0064] Embodiment 3 is similar to Embodiment 1, please refer to Figure 1-2 , the difference is that in this embodiment, the defective pole piece automatic rejection device in Embodiment 1 is further optimized. Further, a sensor for detecting defective pole pieces is provided on the side of the movable docking mechanism 1 facing away from the fixed docking mechanism 2. Preferably, the sensor is an optical fiber sensor 11, and it can be determined whether there are defects on the pole piece through the optical fiber sensor 11. The optical fiber sensor 11 is preferably arranged on one side of the clamping rollers 8, and it can be automatically determined whether there are defects on the pole piece through the control of the sensor. When it is determined, the whole machine decelerates. And after the sensor determines that there are defects, the distance between the defective section and the cutter on the fixed docking mechanism 2 can be measured in advance, and the cutting operation can be set in advance according to the distance between the defective section and the cutter on the fixed docking mechanism 2. At this time, it can be known that the pole piece that has passed the front cutter position is normal, and the subsequent defective section is cut by the cutting mechanism 3. The position of the defective section to the cutter on the movable docking mechanism 1 is the same. It can be understood that the above-mentioned setting methods of the sensor can be set according to the actual situation.

[0065] Further, the sensor may further include a color mark sensor 10, which is arranged before the fiber optic sensor 11 and used to detect the label of the coated single-sided sheet of the pole piece. A label is attached before the defective section. When the label is detected, the whole machine decelerates to prepare for rejection. When the fiber optic sensor 11 detects the defective section, excision is performed.

[0066] Preferably, a detection component 12, such as CCD vision detection, laser detection, etc., may also be provided on one side of the movable docking mechanism 1 and the fixed docking mechanism 2. Exemplarily, the detection component 12 is a CCD. The CCD determines the gap between the first pole piece segment and the second pole piece segment on the movable docking mechanism 1 and the fixed docking mechanism 2 for precise alignment, ensuring that the gap of the pole piece cross-section meets the requirements. At the same time, it can also detect whether the edge of the pole piece deviates during movement. After deviation occurs, it is calibrated until the alignment amount meets the set value. The clamping roller 8 cooperates with the CCD positioning, which can make the docking of the pole piece more accurate.

[0067] During the use of this embodiment, the fiber optic sensor 11 and the color mark sensor 10 perform detection. A label can be attached before the defective section of the pole piece. After the label is detected by the color mark sensor 10, the whole machine performs a deceleration operation to reduce the running speed of the pole piece. Subsequently, the fiber optic sensor 11 detects the defective section.

[0068] Among them, after the defective section is detected, the pole piece stops moving to prevent deviation when the fixed docking mechanism 2 fixes the pole piece, which affects the cutting accuracy. Subsequently, the cutting mechanism 3 uses a cutter to cut the pole piece located on the fixed docking mechanism 2.

[0069] The second pole piece segment is fixed on the fixed docking mechanism 2. The other end of the pole piece after cutting is removed from the fixed docking mechanism 2 under the clamping of gravity or a robotic arm, etc. Subsequently, the pole piece continues to run until the defective section is completely removed.

[0070] When the defective section cannot be detected on one side of the movable docking mechanism 1, it indicates that the defective section has completely moved. Subsequently, the positioning unit 110 of the movable docking mechanism 1 is used to fix the pole piece, and the cutting mechanism 3 cuts the pole piece on the movable docking mechanism 1 to complete the waste removal action of the pole piece. The other end of the movable docking mechanism 1 docks with the first pole piece segment.

[0071] The movable docking mechanism 1 drives the first pole piece segment to move from the first position to the second position. The positioning unit 110 is docked with the fixed docking mechanism 2. At this time, the movement of the pole piece segment is controlled, and the CCD detects the gap between the two pole piece segments. When the standard is reached, the first pole piece segment stops moving, and the taping machine 9 tapes and joins the first pole piece segment and the second pole piece segment.

[0072] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0073] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0074] In addition, terms such as "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0075] In the present utility model, unless otherwise clearly defined and limited, the first feature being above or below the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being above, over and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, under and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0076] Although the description of the present utility model is made in combination with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included within the spirit and scope of the appended claims.

Claims

1. An automatic defective pole piece rejection device, characterized in that, include A movable docking mechanism (1) comprises a positioning unit (110) and a first driving unit (120), wherein the positioning unit (110) is used to fix the first pole segment located upstream after being cut, and the first driving unit (120) drives the positioning unit (110) to move back and forth between a first position and a second position; A fixed docking mechanism (2) is provided downstream of the movable docking mechanism (1) and is used to fix the second pole segment located downstream after being cut off; A cutting mechanism (3), the cutting mechanism (3) comprising a first cutter (310) and a second cutter (320), one side of each of the first cutter (310) and the second cutter (320) being transmission-connected to a cutter driving member, the first cutter (310) being arranged on the positioning unit (110), and the second cutter (320) being arranged on the fixed docking mechanism (2); The positioning unit (110) drives the first pole segment located at the first position to the second position and docks with the second pole segment.

2. The defective pole piece automatic rejection device according to claim 1, characterized in that, The positioning unit (110) comprises a docking plate (111), a pressure rod (112) and a pressure rod driving member; The first driving unit (120) is in transmission connection with the docking plate (111), the pressure rod (112) is arranged on one side of the docking plate (111), and the pressure rod driving member is in transmission connection with the pressure rod (112) to drive the pressure rod (112) to move closer to or away from the docking plate (111).

3. The defective pole piece automatic rejection device according to claim 1, characterized in that A waste collection box (4) for receiving defective sections of the electrode is provided between the movable docking mechanism (1) and the fixed docking mechanism (2).

4. The defective pole piece automatic rejection device according to claim 3, wherein, A movable roller (5) and a fixed roller (6) are provided between the movable docking mechanism (1) and the fixed docking mechanism (2); The fixed roller (6) is arranged on one side of the waste collection box (4), the movable roller (5) is arranged opposite to the fixed roller (6), and the movable roller (5) can move closer to or farther away from the fixed roller (6) to guide the defective section of the pole piece into the waste collection box (4).

5. The defective pole piece automatic rejection device according to claim 3, characterized in that, A guide plate (7) is also provided on one side of the positioning unit (110) close to the waste collection box (4) to guide the electrode line-missing segment into the waste collection box (4).

6. The defective pole piece automatic rejection device according to claim 1, characterized in that, The movable docking mechanism (1) further comprises a pair of clamping rollers (8) for clamping the pole piece, wherein the pair of clamping rollers (8) are arranged on a side of the positioning unit (110) away from the fixed docking mechanism (2).

7. The defective pole piece automatic rejection device according to claim 6, characterized in that, It also includes a second driving unit, which is in driving connection with a pair of the clamping rollers (8) so that the clamping rollers (8) can move back and forth between the first position and the second position.

8. The defective pole piece automatic rejection device according to claim 1, characterized in that, A glue sticking machine (9) for joining the first pole segment and the second pole segment is also provided on one side of the fixed docking mechanism (2).

9. The defective pole piece automatic rejection device according to claim 1, characterized in that, A sensor for detecting defective pole pieces is provided on the side of the movable docking mechanism facing away from the fixed docking mechanism.

10. The defective pole piece automatic rejection device according to claim 1, characterized in that, The movable docking mechanism and the fixed docking mechanism are further provided with a detection component (12) for detecting the gap between the docking ends of the first pole segment and the second pole segment.

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