Laminated cell production device

Abstract

The utility model belongs to the technical field of battery production, and discloses a laminated battery cell production device. The laminated battery cell production device comprises a negative electrode conveying mechanism, two unwinding rollers, two positive electrode conveying mechanisms, a first identification piece, a second identification piece, a cutter, a winding needle and two first thermal compounding rollers, the unwinding rollers are configured to unwind diaphragms to the downstream, and allowance detection pieces are arranged outside the unwinding rollers; the remaining amount detection piece is used for detecting the length of the remaining diaphragms on the unwinding roller, the negative electrode conveying mechanism can convey negative electrode pieces to the position between the two diaphragms at intervals, and the remaining amount detection piece is in communication connection with the negative electrode conveying mechanism; the positive electrode conveying mechanism is configured to place a positive electrode plate on one side, deviating from the negative electrode plate, of the corresponding diaphragm; a first identification piece is arranged between the positive electrode conveying mechanism and the unwinding roller; the material receiving part is positioned at the downstream of the cutter; and the material belts thermally compounded with the positive plates are stacked in the material receiving part. The laminated battery cell production device can prevent excessive negative plates and positive plates from being conveyed to the diaphragm, so that materials are saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production technical field especially relates to a lamination cell production device. BACKGROUND

[0002] The core is made in the falling and stacking mode, wherein the negative electrode sheet, the positive electrode sheet and the diaphragm are core components, after falling and stacking, the positive electrode sheet and the negative electrode sheet are alternately stacked in the core, the diaphragm is arranged between the two adjacent electrode sheets, and the diaphragm is taken as the basis in the production.

[0003] Since 30-40 meters of diaphragm are needed to produce one core package, one roll of diaphragm cannot exactly meet the production of the last complete core, the insufficient length of the subsequent diaphragm cannot be found in time in the production process, continuous production is carried out for a period of time, and it is found that the length is insufficient, but at this time, the plurality of positive electrode sheets and the negative electrode sheets have been hot-combined on the diaphragm, so that the raw materials in this part cannot form a complete core, and the positive and negative electrode sheet raw materials are wasted.

[0004] Therefore, it is urgent to design a lamination cell production device to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a lamination cell production device, which can find that the subsequent diaphragm is insufficient to produce a complete core in time, avoid the situation that the positive electrode sheets and the negative electrode sheets are sent to the diaphragm, and avoid the waste of raw materials.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] The lamination cell production device comprises:

[0008] The negative electrode conveying mechanism and the two unwinding rollers, the two unwinding rollers are located on the two sides of the negative electrode conveying mechanism respectively, the unwinding roller is configured to unwind the diaphragm downstream, a length of the diaphragm remaining on each unwinding roller is detected by the length detection piece, the negative electrode conveying mechanism is configured to convey the negative electrode sheet to the interval between the two diaphragms at different intervals, so as to convey the material belt downstream together with the two diaphragms, and the length detection piece is in communication connection with the negative electrode conveying mechanism;

[0009] The two positive electrode conveying mechanisms are located downstream of the two unwinding rollers one by one, the positive electrode conveying mechanism is configured to place the positive electrode sheet on the side of the corresponding diaphragm away from the negative electrode sheet, and the positive electrode sheets placed by the two positive electrode conveying mechanisms are alternately arranged;

[0010] A first identification member is arranged between the positive electrode conveying mechanism and the corresponding unwinding roller on at least one side, and is configured to identify the engagement position of the unwinding roller and communicate with the negative electrode conveying mechanism and the positive electrode conveying mechanism.

[0011] Two first thermal composite rollers are arranged on both sides of the material belt and are configured to heat the material belt.

[0012] A second identification member is arranged downstream of the first thermal composite roller and is configured to identify the gap between the two negative electrode pieces.

[0013] A cutter and a winding needle are arranged downstream of the second identification member, the cutter is in communication with the second identification member and can cut the material belt, and the winding needle can clamp and rotate the material belt, and the winding needle can change the upstream and downstream positions relative to the cutter.

[0014] A receiving member is arranged downstream of the cutter, and the material belt with the positive electrode piece is stacked in the receiving member.

[0015] As an optional solution, the first identification member is a color marker sensor, and two rolls of the separator film of the same unwinding roller are engaged through a separator film connecting belt, and the color of the separator film connecting belt is different from that of the separator film.

[0016] As an optional solution, the negative electrode conveying mechanism comprises:

[0017] A negative electrode unwinding roller is configured to release a continuous negative electrode material belt.

[0018] A negative electrode coding roller is arranged downstream of the negative electrode unwinding roller and is configured to print a negative electrode code on the negative electrode material belt.

[0019] A negative electrode scanning camera is arranged downstream of the negative electrode coding roller and is configured to identify the negative electrode code and defects of the negative electrode material belt.

[0020] A negative electrode cutting member is arranged downstream of the negative electrode scanning camera and is configured to cut the continuous negative electrode material belt into single negative electrode pieces.

[0021] A first feeding roller is arranged downstream of the negative electrode cutting member and is configured to sequentially convey the negative electrode pieces downstream.

[0022] The first scrap component is located downstream of the first feeding roller. The first scrap component comprises a first blocking member and a first collecting member. The first blocking member is in communication with the negative scanning camera and can be switched between a first position and a second position. In the first position, the first blocking member allows the negative sheet to be transported between two separators. In the second position, the first blocking member blocks the negative sheet and forces the negative sheet into the first collecting member.

[0023] As an optional solution, the first scrap component further comprises a first frame and a first rotating drive installed on the first frame. The first blocking member is in the form of a plate and is connected to the output end of the first rotating drive. The first rotating drive can drive the first blocking member to rotate and switch between the first position and the second position.

[0024] As an optional solution, the positive conveying mechanism comprises:

[0025] A positive unwinding roller configured to release a continuous positive material belt;

[0026] A positive encoding roller located downstream of the positive unwinding roller and configured to encode the positive material belt;

[0027] A positive scanning camera located downstream of the positive encoding roller and configured to identify the positive encoding and defects of the positive material belt;

[0028] A positive cutting member located downstream of the positive scanning camera and configured to cut the continuous positive material belt into individual positive sheets;

[0029] A second feeding roller located downstream of the positive cutting member and configured to sequentially convey the positive sheets downstream;

[0030] A second scrap component located downstream of the second feeding roller. The second scrap component comprises a second blocking member and a second collecting member. The second blocking member is in communication with the positive scanning camera and can be switched between a third position and a fourth position. In the third position, the second blocking member allows the positive sheet to be placed on the separator. In the fourth position, the second blocking member blocks the positive sheet and forces the positive sheet into the second collecting member.

[0031] As an optional solution, the second scrap component further comprises a second frame and a second rotating drive installed on the second frame. The second blocking member is in the form of a plate and is connected to the output end of the second rotating drive. The second rotating drive can drive the second blocking member to rotate and switch between the third position and the fourth position.

[0032] As an optional solution, two second thermal compounding rollers are arranged upstream of the positive electrode conveying mechanism, and the two second thermal compounding rollers are configured to thermally compound the two separators and the negative electrode sheet.

[0033] As an optional solution, a first driving roller is arranged upstream of the cutter, and a second driving roller is arranged downstream of the cutter, and the winding needle can stay between the cutter and the first driving roller or stay between the cutter and the second driving roller.

[0034] As an optional solution, in the plurality of negative electrode sheets in the same battery cell, the interval distance between adjacent negative electrode sheets is X1, the interval distance between the last negative electrode sheet of the previous battery cell and the first negative electrode sheet of the next battery cell is X2, and X2>X1.

[0035] As an optional solution, the material belt is stacked into a battery cell by a stacking mechanism in the material receiving member.

[0036] The beneficial effects of the utility model lie in:

[0037] The utility model provides a lamination electric core production device, through negative pole conveying mechanism to the two diaphragm between conveying negative pole piece, normal production time, negative pole conveying mechanism conveys negative pole piece, the interval of adjacent two negative pole pieces is first interval, two positive pole conveying mechanism places positive pole piece alternately on the side of diaphragm away from negative pole piece downstream, by first hot compound roll, the material band is hot compound together, the material band is stacked in the receiving piece and forms the electric core, when the diaphragm (the diaphragm on two unwinding rollers is synchronous material feeding, and the diaphragm allowance is same) of remaining diaphragm of unwinding roller is insufficient to produce a complete electric core, the allowance detection spare sends a signal, and negative pole conveying mechanism and positive pole conveying mechanism continue to convey negative pole piece and positive pole piece, until negative pole conveying mechanism conveys the negative pole piece of a complete electric core 210, and then more convey a negative pole piece which is second interval setting with the front negative pole piece, to the whole machine stop processing, to two unwinding rollers are handled, and the new and old diaphragm connecting position forms diaphragm connection, at this time, unwinding roller operation, negative pole conveying mechanism and positive pole conveying mechanism do not feed, when diaphragm connection passes first identification spare, first identification spare sends instruction, and negative pole conveying mechanism starts conveying negative pole piece, and the negative pole piece of conveying is second interval setting with second negative pole piece, and the subsequent adjacent multiple negative pole pieces are first interval setting, when the second interval of diaphragm connection downstream passes second identification spare, the material band is clamped by needle, and the second interval is cut by cutter, and needle moves to the downstream of cutter and starts winding and rejecting range, when the second interval of diaphragm connection upstream passes second identification spare, after again passing the preset time, the second interval is cut by cutter, and needle takes away the rejecting range, and after taking away the rejecting range, needle resets to the upstream of cutter, then carries out the stacking of new one electric core, and thus, when the subsequent diaphragm is insufficient, the lamination electric core production device can discover in time, stop and change diaphragm, and the position with diaphragm connection is rejected, avoids the situation that more negative pole pieces and positive pole pieces are sent to diaphragm, avoids the waste of raw materials. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is the structure schematic diagram of the lamination electric core production device provided by the utility model embodiment;

[0039] Figure 2 It is the structure schematic diagram of the material band normal production and rejecting process provided by the utility model embodiment;

[0040] Figure 3 It is the flow chart of the use method of the lamination electric core production device provided by the utility model embodiment;

[0041] Figure 4 It is the refinement step flow chart of S60 provided by the utility model embodiment;

[0042] Figure 5 It is the first state diagram of material band production provided by the utility model embodiment;

[0043] Figure 6 is a second state diagram of material belt production provided by the embodiment of the utility model;

[0044] Figure 7 is a third state diagram of material belt production provided by the embodiment of the utility model;

[0045] Figure 8 is a fourth state diagram of material belt production provided by the embodiment of the utility model;

[0046] Figure 9 is a fifth state diagram of material belt production provided by the embodiment of the utility model.

[0047] In the figure,

[0048] 10, negative electrode conveying mechanism, 11, negative electrode unwinding roller, 12, negative electrode material belt, 13, negative electrode coding roller, 14, negative electrode scanning camera, 15, negative electrode cutting piece, 16, first feeding roller, 17, first reject assembly, 171, first material blocking piece, 172, first material collecting piece, 18, negative electrode piece,

[0049] 20, unwinding roller, 21, diaphragm, 211, second interval, 212, first interval, 213, reject range, 22, diaphragm connecting belt,

[0050] 30, residual amount detection piece,

[0051] 40, positive electrode conveying mechanism, 41, positive electrode unwinding roller, 42, positive electrode material belt, 43, positive electrode coding roller, 44, positive electrode scanning camera, 45, positive electrode cutting piece, 46, second feeding roller, 47, second reject assembly, 471, second material blocking piece, 472, second material collecting piece, 48, positive electrode piece,

[0052] 51, first identification piece, 52, second identification piece,

[0053] 61, first thermal compounding roller, 62, second thermal compounding roller, 63, first driving roller, 64, second driving roller,

[0054] 70, cutter, 80, winding needle, 90, material connecting piece, 200, stacking mechanism, 210, complete battery core. DETAILED DESCRIPTION

[0055] The utility model will be further explained in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all the structures.

[0056] In the description of the utility model, unless another definite provision and limitation, the term "link", "connection", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through the indirect connection of intermediate medium, can be the communication of two elements or the interaction of two elements.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0057] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the direct contact of the first and second features, also can include the contact of the first and second features not direct contact but through the additional feature between them.Moreover, the first feature is "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0058] In the description of the embodiment, the orientation or position relationship of the terms "on", "under", "left", "right" and the like is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0059] The embodiment provides a laminated core production device, can find that subsequent diaphragm 21 is insufficient to produce a complete battery core 210 in time, avoids the situation that more negative pole pieces 18 and positive pole pieces 48 are sent to diaphragm 21, avoids the waste of raw materials. Figure 1As shown, the laminated battery cell production device includes a negative electrode conveying mechanism 10, two unwinding rollers 20, two positive electrode conveying mechanisms 40, a first identification member 51, a second identification member 52, a cutter 70, a winding needle 80, and two first thermal compounding rollers 61. The two unwinding rollers 20 are respectively located on both sides of the negative electrode conveying mechanism 10, and the unwinding rollers 20 are configured to unwind the separator 21 downstream. Each unwinding roller 20 is provided with a margin detection member 30 outside, and the margin detection member 30 is used to detect the length of the separator 21 remaining on the unwinding roller 20. The negative electrode conveying mechanism 10 is configured to convey the negative electrode sheet 18 to the space between the two separators 21 at different intervals, so as to jointly convey the material belt downstream with the two separators 21. The margin detection member 30 is in communication connection with the negative electrode conveying mechanism 10. The two positive electrode conveying mechanisms 40 are correspondingly located downstream of the two unwinding rollers 20. The positive electrode conveying mechanism 40 is configured to place the positive electrode sheet 48 on the side of the corresponding separator 21 away from the negative electrode sheet 18. The positive electrode sheets 48 placed by the two positive electrode conveying mechanisms 40 are alternately arranged. The first identification member 51 is arranged between at least one side of the positive electrode conveying mechanism 40 and the corresponding unwinding roller 20. The first identification member 51 is configured to identify the joint position of the unwinding roller 20 and is in communication connection with the negative electrode conveying mechanism 10 and the positive electrode conveying mechanism 40. The two first thermal compounding rollers 61 are respectively located on both sides of the material belt and are configured to heat the material belt. The second identification member 52 is located downstream of the first thermal compounding roller 61 and is configured to identify the gap between the two negative electrode sheets 18. The cutter 70 and the winding needle 80 are located downstream of the second identification member 52. The cutter 70 is in communication connection with the second identification member 52 and can cut off the material belt. The winding needle 80 can clamp and rotate the material belt. The winding needle 80 can change the upstream and downstream positions relative to the cutter 70. The receiving member 90 is located downstream of the cutter 70. The material belt with the positive electrode sheet 48 thermally compounded is stacked in the receiving member 90.

[0060] The laminated battery cell production device is described above, and Figure 2, the negative electrode conveying mechanism 10 conveys the negative electrode sheet 18 between two separators 21, in normal production, the interval between two adjacent negative electrode sheets 18 is the first interval 212 when the negative electrode conveying mechanism 10 conveys the negative electrode sheet 18, the two positive electrode conveying mechanisms 40 alternately place the positive electrode sheet 48 on the side of the separator 21 away from the negative electrode sheet 18 downstream, the material belt is hot-combined together by the first hot-combining roller 61, and the material belt is stacked in the receiving member 90 to form a battery cell; when the remaining separator 21 on the unwinding roller 20 (the separators 21 on the two unwinding rollers 20 are synchronously unwound, and the remaining amount of the separators 21 is the same) is insufficient to produce a complete battery cell, the remaining amount detection member 30 sends a signal, the negative electrode conveying mechanism 10 and the positive electrode conveying mechanism 40 continue to convey the negative electrode sheet 18 and the positive electrode sheet 48, until the negative electrode conveying mechanism 10 conveys the negative electrode sheet 18 of a complete battery cell, and then one more negative electrode sheet 18 is conveyed, which is arranged at the second interval 211 with the front negative electrode sheet 18, the whole machine is stopped for processing, the two unwinding rollers 20 are connected for processing, and the connection position of the new and old separators 21 forms a separator connecting belt 22, at this time, the unwinding roller 20 runs, the negative electrode conveying mechanism 10 and the positive electrode conveying mechanism 40 do not feed, when the separator connecting belt 22 passes through the first identification member 51, the first identification member 51 sends a command, the negative electrode conveying mechanism 10 starts to convey the negative electrode sheet 18, the first negative electrode sheet 18 is arranged at the second interval 211 with the second negative electrode sheet 18, and the subsequent multiple negative electrode sheets 18 are arranged at the first interval 212, when the second interval 211 downstream of the separator connecting belt 22 passes through the second identification member 52, the winding needle 80 clamps the material belt, the cutting knife 70 cuts the second interval 211, the winding needle 80 moves to the downstream of the cutting knife 70 to start to wind the scrap range 213, when the second interval 211 upstream of the separator connecting belt 22 passes through the second identification member 52, after a preset time, the cutting knife 70 cuts the second interval 211, and the winding needle 80 takes away the scrap range 213, after the scrap range 213 is taken away, the winding needle 80 is reset to the upstream of the cutting knife 70, and then a new battery cell is stacked, thereby the stacking battery cell production device can timely find that the subsequent separator 21 is insufficient, stop and replace the separator 21, and the position with the separator connecting belt 22 is removed, so that the negative electrode sheet 18 and the positive electrode sheet 48 are not excessively fed to the separator 21, and the waste of raw materials is avoided.

[0061] Optionally, the remaining amount detection member 30 judges the amount of the remaining separator 21 by detecting the thickness of the separator 21 on the unwinding roller 20, in other embodiments, the remaining amount detection member 30 can also obtain the amount of the remaining separator 21 by other means, which is not limited here.

[0062] Optionally, among the multiple negative electrode pieces 18 within the same battery cell, the spacing between adjacent negative electrode pieces 18 is X1 (i.e., the first spacing 212), and the spacing between the last negative electrode piece 18 of the previous battery cell and the first negative electrode piece 18 of the next battery cell is X2 (i.e., the second spacing 211), where X2 > X1. Since the spacing between two adjacent negative electrode pieces 18 within a battery cell is already small enough, setting X2 > X1 makes it easier for the second identification element 52 to identify the electrode.

[0063] Optionally, the first identification element 51 is a color mark sensor, and the color of the diaphragm tape 22 is different from the color of the diaphragm 21. With the above settings, as long as the color of the diaphragm tape 22 is set to be different from the color of the diaphragm 21, the first identification element 51 can easily identify the diaphragm tape 22.

[0064] Optionally, such as Figure 1 As shown, the negative electrode conveying mechanism 10 includes a negative electrode unwinding roller 11, a negative electrode coding roller 13, a negative electrode scanning camera 14, a negative electrode cutter 15, a first feeding roller 16, and a first rejection assembly 17. The negative electrode unwinding roller 11 is configured to release a continuous negative electrode strip 12; the negative electrode coding roller 13 is located downstream of the negative electrode unwinding roller 11 and is configured to print negative electrode codes on the negative electrode strip 12; the negative electrode scanning camera 14 is located downstream of the negative electrode coding roller 13 and is configured to identify negative electrode codes and defects in the negative electrode strip 12; the negative electrode cutter 15 is located downstream of the negative electrode scanning camera 14 and is configured to cut the continuous negative electrode strip 12 into individual pieces. The negative electrode sheet 18; the first feeding roller 16 is located downstream of the negative electrode cutting member 15 and is configured to sequentially convey the negative electrode sheet 18 downstream; the first rejection assembly 17 is located downstream of the first feeding roller 16, and the first rejection assembly 17 includes a first stop 171 and a first collection member 172. The first stop 171 is communicatively connected to the negative electrode scanning camera 14 and can switch between a first position and a second position. In the first position, the first stop 171 allows the negative electrode sheet 18 to enter and be transported between the two diaphragms 21. In the second position, the first stop 171 blocks the negative electrode sheet 18 and forces the negative electrode sheet 18 into the first collection member 172. With the above settings, the negative electrode coding roller 13 can count the number of negative electrode sheets 18 output. For example, a battery cell needs the negative electrode conveying mechanism 10 to output N negative electrode sheets 18. The number of N is counted by the negative electrode coding roller 13. When there is a defect, the corresponding negative electrode sheet 18 will enter the first stop 171 and will not flow downstream, thereby avoiding the defective negative electrode sheet 18 from being made into a battery cell and affecting the battery cell performance. When the negative electrode coding roller 13 counts, it will subtract the number of negative electrode sheets 18 that enter the first stop 171 to ensure that the number of negative electrode sheets 18 finally made into a battery cell output by the negative electrode conveying mechanism 10 is correct.

[0065] It should be noted that the negative cutting part 15 is only schematically shown in the cutting position, and this structure is prior art and will not be described here.

[0066] Optionally, the first rejection assembly 17 further comprises a first frame (not shown) and a first rotary driving member (not shown) mounted on the first frame, the first material blocking member 171 is in the form of a plate and is connected to the output end of the first rotary driving member, and the first rotary driving member can drive the first material blocking member 171 to rotate and switch between the first position and the second position. Through the above arrangement, the first rotary driving member drives the first material blocking member 171 to rotate to realize the switching of the first material blocking member 171 between the first position and the second position. The first rotary driving member can be a servo motor.

[0067] Optionally, the positive electrode conveying mechanism 40 comprises a positive electrode unwinding roller 41, a positive electrode encoding roller 43, a positive electrode scanning camera 44, a positive electrode cutting part 45, a second feeding roller 46, and a second rejection assembly 47. The positive electrode unwinding roller 41 is configured to release a continuous positive electrode material belt 42; the positive electrode encoding roller 43 is located downstream of the positive electrode unwinding roller 41 and is configured to print a positive electrode code on the positive electrode material belt 42; the positive electrode scanning camera 44 is located downstream of the positive electrode encoding roller 43 and is configured to identify the positive electrode code and defects of the positive electrode material belt 42; the positive electrode cutting part 45 is located downstream of the positive electrode scanning camera 44 and is configured to cut the continuous positive electrode material belt 42 into individual positive electrode sheets 48; the second feeding roller 46 is located downstream of the positive electrode cutting part 45 and is configured to sequentially convey the positive electrode sheets 48 downstream; and the second rejection assembly 47 is located downstream of the second feeding roller 46, and the second rejection assembly 47 comprises a second material blocking member 471 and a second material collecting member 472. The second material blocking member 471 is in communication connection with the positive electrode scanning camera 44 and can switch between a third position and a fourth position. In the third position, the second material blocking member 471 allows the positive electrode sheet 48 to be placed on the separator 21, and in the fourth position, the second material blocking member 471 blocks the positive electrode sheet 48 and forces the positive electrode sheet 48 into the second material collecting member 472. Through the above arrangement, the positive electrode encoding roller 43 can count the number of positive electrode sheets 48 output, for example, one battery core requires the positive electrode conveying mechanism 40 to output M positive electrode sheets 48, and the number M is counted by the positive electrode encoding roller 43. When there is a defect, the corresponding positive electrode sheet 48 will enter the second material blocking member 471 and will not flow downstream, thereby avoiding the defective positive electrode sheet 48 from being made into a battery core, affecting the performance of the battery core. The positive electrode encoding roller 43 will exclude the number of positive electrode sheets 48 entering the second material blocking member 471 when counting, ensuring that the number of positive electrode sheets 48 output by the positive electrode conveying mechanism 40 to the downstream final battery core is correct.

[0068] Optionally, the second scrap removing assembly 47 further comprises a second frame body and a second rotating driving member mounted on the second frame body, the second material blocking member 471 is in a plate shape and connected to an output end of the second rotating driving member, and the second rotating driving member is capable of driving the second material blocking member 471 to rotate and switch between the third position and the fourth position. Through the above arrangement, the second rotating driving member drives the second material blocking member 471 to rotate, so as to realize the switching of the second material blocking member 471 between the third position and the fourth position. The second rotating driving member can be a servo motor.

[0069] Optionally, as shown in Figure 1 The upstream of the positive electrode conveying mechanism 40 is provided with two second thermal composite rollers 62, and the two second thermal composite rollers 62 are configured to thermally composite the two separators 21 and the negative electrode sheet 18. Through the above arrangement, the second thermal composite roller 62 first thermally composites the two separators 21 and the negative electrode sheet 18 located between the two separators 21, and then the first thermal composite roller 61 thermally composites the positive electrode sheet 48 again, so that each sheet is fully thermally composites, and the thermal composite of the sheet by only one thermal composite roller is prevented from being insufficient.

[0070] Optionally, a first driving roller 63 is arranged upstream of the cutter 70, and a second driving roller 64 is arranged downstream of the cutter 70, and the winding needle 80 can stay between the cutter 70 and the first driving roller 63 or stay between the cutter 70 and the second driving roller 64. Through the above arrangement, the two driving rollers provide driving force for the material belt to avoid slipping during operation, and at the same time, the first driving roller 63 is arranged before the cutter 70, so as to ensure that the cutter 70 is easy to cut when cutting the material belt, and the second driving roller 64 is arranged in front of the material receiving member 90, so as to ensure that the material belt enters the material receiving member 90 smoothly.

[0071] The battery cell in the material receiving member 90 is stacked by the stacking mechanism 200, which is a part of the prior art and will not be described here.

[0072] The use method of the stacked battery cell production device is as follows, as shown in Figure 3 The use method of the stacked battery cell production device comprises the following steps:

[0073] S10: The remaining separator 21 on the unwinding roller 20 is detected by the remaining amount detection member 30.

[0074] S20: Whether the length of the remaining separator 21 meets the use amount of one battery cell is judged, if the result is yes, S30 is executed, and if the result is no, S40 is executed.

[0075] S30: The battery cell is normally produced, and the state of the entire stacked battery cell production device is shown in Figure 5 ;

[0076] S40: the negative electrode conveying mechanism 10 conveys the negative electrode sheet 18 by the second interval 211 after conveying a sufficient number of negative electrode sheets 18 for one battery cell, and both the negative electrode conveying mechanism 10 and the positive electrode conveying mechanism 40 stop conveying;

[0077] S50: overall shutdown, change the rolls of the two unwinding rollers 20, and form a joint position between the two rolls of the diaphragm 21 before and after the change; the processes of S40 and S50 are described with reference to Figure 6 ;

[0078] S60: discard the diaphragm tape with the negative electrode sheet 18 spaced by the second interval 211 from the previous negative electrode sheet 18 to the joint position;

[0079] S70: continue to produce battery cells, and repeat S10.

[0080] The use method of the above stack battery cell production device, by setting the excess amount detection piece 30, the excess amount of the diaphragm 21 on the unwinding roller 20 is monitored at any time, when the excess amount is insufficient for one battery cell, after the positive electrode sheet 48 and the negative electrode sheet 18 of the previous battery cell are conveyed, the negative electrode sheet 18 is conveyed again, and when discarded later, the negative electrode sheet 18 is used as a recognition mark for discarding, avoiding the situation that the negative electrode sheet 18 and the positive electrode sheet 48 are sent to the diaphragm 21, and avoiding the waste of raw materials.

[0081] Optionally, in S30, the normal production of the battery cell means that the negative electrode conveying mechanism 10 conveys the negative electrode sheet 18 to the two diaphragms 21 by the second interval 211, and then conveys multiple negative electrode sheets 18 by the first interval 212, the two positive electrode conveying mechanisms 40 alternately place the positive electrode sheet 48 to the diaphragm 21, and the diaphragm 21 is stacked in the receiving piece 90.

[0082] Specifically, as shown in Figure 4 S60 includes:

[0083] S61: the second recognition piece 52 recognizes the second interval 211 in the two negative electrode sheets 18, which represents the end of the production of the previous battery cell;

[0084] S62: the roll needle 80 clamps the diaphragm tape, the cutter 70 receives the information of the second recognition piece 52, and after the last negative electrode sheet 18 of the previous battery cell passes through the cutter 70, the cutter 70 cuts off the second interval 211;

[0085] S63: the roll needle 80 clamps the cut diaphragm tape and moves to the downstream of the cutter 70 to start winding the waste;

[0086] S64: after the first recognition piece 51 recognizes the joint position, the battery cell is normally produced and forms a second interval 211 behind the joint position; (S61-S66 are described with reference to Figure 7 )

[0087] S65: the second identification member 52 identifies the second interval 211 behind the joint position;

[0088] S66: the winding needle 80 stops rotating, the cutting knife 70 receives the information of the second identification member 52, and cuts off the material belt at the second interval 211 behind the joint position;

[0089] S67: the winding needle 80 retracts, and the operator or the automatic device takes out the waste material (the waste range 213) to the scrap box, and the winding needle 80 returns to the upstream of the cutting knife 70; Figure 2 (S65-S67, see Figure 9 )

[0090] S68: the battery cell continues to be produced.

[0091] Through the above setting, the second identification member 52 is responsible for identifying the second interval 211, and instructing the cutting knife 70 and the winding needle 80 to act, in the waste removal process, cooperating with the second interval 211 manufactured by the negative electrode conveying mechanism 10, the starting position and the ending position of the waste range 213 can be accurately identified, the cutting knife 70 is instructed to cut off, and the winding needle 80 collects the waste range 213, only two negative electrode sheets 18 in the waste range 213, compared with wasting a large number of negative electrode sheets 18 and positive electrode sheets 48, the waste of raw materials is greatly reduced, at the same time, the first identification member 51 can identify the diaphragm connecting belt 22, and instruct the subsequent negative electrode conveying mechanism 10 and the positive electrode conveying mechanism 40 to start to produce the battery cell normally, so as to ensure that the production rhythm is compact; in addition, the cooperation of the second identification member 52 and the second interval 211 can also distinguish the previous battery cell and the next battery cell when the battery cell is normally produced, and the automation of production is improved.

[0092] It should be noted that after the second identification member 52 identifies the second interval 211, the second interval 211 needs a certain time and distance to reach the position of the cutting knife 70, and the time and distance are automatically determined by the background system. In addition, between S67 and S68, the material belt passes through the second driving roller 64, and drives the material belt to continue to move downstream.

[0093] Optionally, the second identification member 52 is a CCD camera.

[0094] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be carried out without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made in the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A device for producing a stacked cell, characterized by comprising: The application relates to a battery material strip production device, which comprises: a negative electrode conveying mechanism (10) and two unwinding rollers (20), the two unwinding rollers (20) are respectively located on the two sides of the negative electrode conveying mechanism (10), the unwinding rollers (20) are configured to unwind diaphragms (21) downstream, a length of the diaphragm (21) remaining on each unwinding roller (20) is detected by a length detection member (30) arranged outside the unwinding roller (20), the negative electrode conveying mechanism (10) is configured to convey negative electrode sheets (18) to the space between two diaphragms (21) at different intervals, so that the negative electrode sheets (18) and the two diaphragms (21) jointly convey a material strip downstream, and the length detection member (30) is in communication connection with the negative electrode conveying mechanism (10); two positive electrode conveying mechanisms (40) are correspondingly located downstream of the two unwinding rollers (20), the positive electrode conveying mechanisms (40) are configured to place positive electrode sheets (48) on the side of the corresponding diaphragm (21) away from the negative electrode sheet (18), and the positive electrode sheets (48) placed by the two positive electrode conveying mechanisms (40) are alternately arranged; a first identification member (51) is arranged between at least one side of the positive electrode conveying mechanism (40) and the corresponding unwinding roller (20), the first identification member (51) is configured to identify the joint position of the unwinding roller (20) and is in communication connection with the negative electrode conveying mechanism (10) and the positive electrode conveying mechanism (40); two first thermal composite rollers (61) are respectively located on the two sides of the material strip and are configured to heat the material strip; a second identification member (52) is located downstream of the first thermal composite roller (61) and is configured to identify the gap between the two negative electrode sheets (18); a cutter (70) and a winding needle (80) are located downstream of the second identification member (52), the cutter (70) is in communication connection with the second identification member (52) and can cut off the material strip, the winding needle (80) can clamp and rotate the material strip, and the winding needle (80) can change the upstream and downstream positions relative to the cutter (70); a material receiving member (90) is located downstream of the cutter (70), and the material strip with the positive electrode sheet (48) thermally compounded is stacked in the material receiving member (90).

2. The device for producing a stacked cell according to claim 1, wherein The first identification member (51) is a color marker sensor, two diaphragms (21) wound by the same unwinding roller (20) are jointed through a diaphragm jointing belt (22), and the color of the diaphragm jointing belt (22) is different from that of the diaphragm (21).

3. The device for producing a stacked cell according to claim 1, wherein The negative electrode conveying mechanism (10) comprises: a negative electrode unwinding roller (11) configured to release a continuous negative electrode material strip (12); a negative electrode coding roller (13) located downstream of the negative electrode unwinding roller (11) and configured to print a negative electrode code on the negative electrode material strip (12); a negative electrode scanning camera (14) located downstream of the negative electrode coding roller (13) and configured to identify the negative electrode code and defects of the negative electrode material strip (12). A negative cutting member (15) located downstream of the negative scanning camera (14) and configured to cut the continuous negative material belt (12) into single negative sheets (18); A first feeding roller (16) located downstream of the negative cutting member (15) and configured to sequentially feed the negative sheets (18) downstream; A first rejection assembly (17) located downstream of the first feeding roller (16), the first rejection assembly (17) comprising a first blocking member (171) and a first collecting member (172), the first blocking member (171) being in communication connection with the negative scanning camera (14) and being switchable between a first position and a second position, the first blocking member (171) in the first position allowing the negative sheets (18) to enter between two separators (21), and the first blocking member (171) in the second position blocking the negative sheets (18) and forcing the negative sheets (18) to enter the first collecting member (172).

4. The device according to claim 3, wherein The first rejection assembly (17) further comprises a first frame body and a first rotating drive member mounted on the first frame body, the first blocking member (171) being plate-shaped and connected to an output end of the first rotating drive member, and the first rotating drive member being capable of driving the first blocking member (171) to rotate and switch between the first position and the second position.

5. The device for producing a stacked cell according to claim 1, wherein The positive conveying mechanism (40) comprises: A positive unwinding roller (41) configured to release a continuous positive material belt (42); A positive encoding roller (43) located downstream of the positive unwinding roller (41) and configured to encode the positive material belt (42); A positive scanning camera (44) located downstream of the positive encoding roller (43) and configured to identify the positive encoding and defects of the positive material belt (42); A positive cutting member (45) located downstream of the positive scanning camera (44) and configured to cut the continuous positive material belt (42) into single positive sheets (48); A second feeding roller (46) located downstream of the positive cutting member (45) and configured to sequentially feed the positive sheets (48) downstream; A second rejection assembly (47) located downstream of the second feeding roller (46), the second rejection assembly (47) comprising a second blocking member (471) and a second collecting member (472), the second blocking member (471) being in communication connection with the positive scanning camera (44) and being switchable between a third position and a fourth position, the second blocking member (471) in the third position allowing the positive sheets (48) to be placed on the separators (21), and the second blocking member (471) in the fourth position blocking the positive sheets (48) and forcing the positive sheets (48) to enter the second collecting member (472).

6. The device according to claim 5, wherein The second scrap removing assembly (47) further comprises a second frame body and a second rotary driving member mounted on the second frame body, the second material blocking member (471) is in a plate shape and is connected to an output end of the second rotary driving member, and the second rotary driving member can drive the second material blocking member (471) to rotate and switch between the third position and the fourth position.

7. The device for producing a stacked cell according to any one of claims 1 to 6, characterized by Two second thermal composite rollers (62) are arranged upstream of the positive electrode conveying mechanism (40), and the two second thermal composite rollers (62) are configured to thermally composite the two separators (21) and the negative electrode sheet (18).

8. The device for producing a stacked cell according to any one of claims 1 to 6, wherein A first driving roller (63) is arranged upstream of the cutter (70), and a second driving roller (64) is arranged downstream of the cutter (70), and the winding needle (80) can stay between the cutter (70) and the first driving roller (63) or stay between the cutter (70) and the second driving roller (64).

9. The device for producing a stacked cell according to any one of claims 1 to 6, wherein In the plurality of negative electrode sheets (18) in the same battery cell, the interval distance between adjacent negative electrode sheets (18) is X1, the interval distance between the last negative electrode sheet (18) of the previous battery cell and the first negative electrode sheet (18) of the next battery cell is X2, and X2>X1.

10. The device for producing a stacked cell according to any one of claims 1 to 6, wherein The material belt is stacked into a battery cell by a stacking mechanism (200) in the material receiving member (90).

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