Laminated cell production device and application method thereof

Abstract

The invention belongs to the technical field of battery production, and discloses a laminated battery cell production device and a use method thereof. The laminated 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 and the use method thereof can prevent excessive negative plates and positive plates from being conveyed to the diaphragm, and materials are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and in particular to a laminated battery cell production device and a use method thereof. Background Art

[0002] The battery cell is manufactured by a stacking method, in which the negative electrode sheet, the positive electrode sheet and the separator are the core components. After stacking, the positive electrode sheet and the negative electrode sheet are alternately stacked in the battery cell, and two adjacent electrode sheets are separated by a separator. The separator is used as the basis during production.

[0003] Since the production of a core pack requires 30-40 meters of diaphragm, one roll of diaphragm cannot be just enough to produce the last complete battery cell. During the production process, it is not discovered in time that the subsequent diaphragm is insufficient in length. After a period of continuous production, it is discovered that the length is insufficient. However, at this time, multiple positive and negative electrode sheets have been heat-compounded onto the diaphragm, resulting in this part of the raw materials being unable to form a complete battery cell, causing a waste of the positive and negative electrode raw materials.

[0004] Therefore, there is an urgent need to design a laminated battery cell production device and a method of using the same to solve the above problems. Summary of the invention

[0005] One object of the present invention is to provide a laminated battery cell production device that can promptly detect that the subsequent diaphragm is insufficient to produce a complete battery cell, avoid the situation where too many negative and positive electrodes are fed onto the diaphragm, and avoid waste of raw materials.

[0006] Another object of the present invention is to provide a method for using a laminated battery cell production device, which can promptly detect that the subsequent diaphragm is insufficient to produce a complete battery cell, avoid the situation of feeding too many negative and positive electrodes onto the diaphragm, and avoid waste of raw materials.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] The laminated battery cell production device comprises:

[0009] A negative electrode conveying mechanism and two unwinding rollers, the two unwinding rollers are respectively located on both sides of the negative electrode conveying mechanism, the unwinding rollers are configured to unwind the separator downstream, each of the unwinding rollers is provided with a remaining amount detection member, the remaining amount detection member is used to detect the length of the separator remaining on the unwinding roller, the negative electrode conveying mechanism is configured to convey the negative electrode sheet at different intervals between the two separators, so as to convey the material belt downstream together with the two separators, and the remaining amount detection member is communicatively connected with the negative electrode conveying mechanism;

[0010] Two positive electrode conveying mechanisms are located downstream of the two unwinding rollers in a one-to-one correspondence, and the positive electrode conveying mechanisms are configured to place the positive electrode sheet on the side of the corresponding separator away from the negative electrode sheet, and the positive electrode sheets placed by the two positive electrode conveying mechanisms are arranged alternately;

[0011] A first identification member, the first identification member is provided between the positive electrode conveying mechanism on at least one side and the corresponding unwinding roller, the first identification member 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;

[0012] Two first hot composite rollers, respectively located on both sides of the material strip and configured to heat the material strip;

[0013] A second identification member, located downstream of the first thermal composite roller and configured to identify a gap between the two negative electrode sheets;

[0014] A cutter and a winding needle are located downstream of the second identification member, the cutter is in communication with the second identification member and can cut the material strip, the winding needle can clamp the material strip and rotate, and the winding needle can change the upstream and downstream positions relative to the cutter;

[0015] The material receiving piece is located downstream of the cutting knife, and the material strip thermally compounded with the positive electrode sheet is stacked in the material receiving piece.

[0016] As an optional solution, the first identification element is a color mark sensor, and the two rolls of the diaphragm on the same unwinding roller are connected by a diaphragm joint belt, and the color of the diaphragm joint belt is different from the color of the diaphragm.

[0017] As an optional solution, the negative electrode transport mechanism includes:

[0018] A negative electrode unwinding roller, configured to release a continuous negative electrode material strip;

[0019] A negative electrode encoding roller, located downstream of the negative electrode unwinding roller and configured to print a negative electrode encoding on the negative electrode material strip;

[0020] A negative electrode scanning camera, located downstream of the negative electrode encoding roller and configured to identify the negative electrode encoding and defects of the negative electrode strip;

[0021] A negative electrode cutting piece, located downstream of the negative electrode scanning camera and configured to cut the continuous negative electrode material strip into individual negative electrode sheets;

[0022] a first feeding roller, located downstream of the negative electrode cutting piece and configured to sequentially convey the negative electrode sheets downstream;

[0023] The first waste rejection component is located downstream of the first feeding roller. The first waste rejection component includes a first material blocking member and a first material collecting member. The first material blocking member is communicatively connected to the negative electrode scanning camera and can be switched between a first position and a second position. The first material blocking member at the first position allows the negative electrode sheet to be transported between the two diaphragms. The first material blocking member at the second position blocks the negative electrode sheet and forces the negative electrode sheet to enter the first material collecting member.

[0024] As an optional solution, the above-mentioned first waste rejection component also includes a first frame and a first rotating driving member installed on the above-mentioned first frame. The above-mentioned first material blocking member is plate-shaped and connected to the output end of the above-mentioned first rotating driving member. The above-mentioned first rotating driving member can drive the above-mentioned first material blocking member to rotate and switch between the above-mentioned first position and the above-mentioned second position.

[0025] As an optional solution, the positive electrode transport mechanism includes:

[0026] A positive electrode unwinding roller, configured to release a continuous positive electrode material strip;

[0027] A positive electrode encoding roller, located downstream of the positive electrode unwinding roller and configured to print a positive electrode encoding on the positive electrode material strip;

[0028] A positive electrode scanning camera, located downstream of the positive electrode encoding roller and configured to identify the positive electrode encoding and defects of the positive electrode strip;

[0029] A positive electrode cutting piece, located downstream of the positive electrode scanning camera and configured to cut the continuous positive electrode material strip into individual positive electrode sheets;

[0030] A second feeding roller is located downstream of the positive electrode cutting piece and is configured to sequentially convey the positive electrode sheets downstream;

[0031] The second waste rejection component is located downstream of the second feeding roller. The second waste rejection component includes a second material blocking member and a second material collecting member. The second material blocking member is communicatively connected to the positive electrode scanning camera and can be switched between a third position and a fourth position. The second material blocking member in the third position allows the positive electrode sheet to be placed on the diaphragm. The second material blocking member in the fourth position blocks the positive electrode sheet and forces the positive electrode sheet to enter the second material collecting member.

[0032] As an optional solution, the second waste rejection assembly also includes a second frame and a second rotating driving member installed on the second frame. The second material blocking member is plate-shaped and connected to the output end of the second rotating driving member. The second rotating driving member can drive the second material blocking member to rotate and switch between the third position and the fourth position.

[0033] As an optional solution, two second heat-combining rollers are arranged upstream of the positive electrode conveying mechanism, and the two second heat-combining rollers are configured to heat-combine the two separators and the negative electrode sheet.

[0034] As an optional solution, a first drive roller is provided upstream of the cutter, and a second drive roller is provided downstream of the cutter, and the winding needle can stay between the cutter and the first drive roller or between the cutter and the second drive roller.

[0035] The method for using the laminated battery core production device is applied to the laminated battery core production device mentioned above, and the method for using the laminated battery core production device mentioned above includes:

[0036] S10: the remaining amount detection member detects the remaining length of the diaphragm on the unwinding roller;

[0037] S20: Determine whether the remaining length of the diaphragm meets the usage of one battery cell. If the determination result is yes, execute S30; if the determination result is no, execute S40;

[0038] S30: Normal production of battery cells;

[0039] S40: after the negative electrode conveying mechanism conveys enough negative electrode sheets for one battery cell and then conveys another negative electrode sheet at a second interval, both the negative electrode conveying mechanism and the positive electrode conveying mechanism stop conveying;

[0040] S50: the whole machine is stopped, and the two unwinding rollers are replaced, so that the two rolls of the diaphragm before and after the roll replacement form the above-mentioned joint position;

[0041] S60: discarding the material strip from the negative electrode sheet that is spaced the second distance from the previous negative electrode sheet to the bonding position;

[0042] S70: Continue to produce battery cells and repeat S10.

[0043] As an optional solution, the above S60 includes:

[0044] S61: the second identification member identifies the second interval between the two negative electrode sheets, indicating that the production of the previous battery cell is completed;

[0045] S62: the winding needle clamps the material strip, the cutter receives the information of the second identification piece, and after the last negative electrode sheet of the previous battery cell passes through the cutter, the cutter cuts the second interval;

[0046] S63: the winding needle clamps the cut material strip and moves to the downstream of the cutter to start winding the waste material;

[0047] S64: After the first identification member identifies the bonding position, the battery cell is produced normally and the second gap is formed behind the bonding position;

[0048] S65: the second identification member identifies the second interval behind the engagement position;

[0049] S66: the cutter receives the information of the second identification member and cuts the material strip at the second interval behind the joining position;

[0050] S67: The winding needle retracts, the operator removes the waste material, and the winding needle returns to the upstream of the cutter.

[0051] The beneficial effects of the present invention are:

[0052] The present invention provides a laminated battery cell production device, which conveys negative electrode sheets between two diaphragms through a negative electrode conveying mechanism. During normal production, when the negative electrode conveying mechanism conveys the negative electrode sheets, the spacing between two adjacent negative electrode sheets is a first spacing. Two positive electrode conveying mechanisms alternately place positive electrode sheets on the side of the diaphragm away from the negative electrode sheets at the downstream, and the material strips are thermally composited together by a first hot composite roller, and the material strips are stacked in a material receiving member to form a battery cell. When the remaining diaphragms on the unwinding rollers (the diaphragms on the two unwinding rollers are discharged synchronously, and the diaphragm residues are the same) are insufficient to produce a complete battery cell, the residue detection member sends a signal, and the negative electrode conveying mechanism and the positive electrode conveying mechanism continue to convey the negative electrode sheets and the positive electrode sheets, until the negative electrode conveying mechanism conveys a negative electrode sheet of a complete battery cell 210, and then conveys another negative electrode sheet arranged at a second spacing with the front negative electrode sheet, the whole machine is shut down, and the two unwinding rollers are spliced ​​to form a diaphragm splice at the connection position of the new and old diaphragms. At this time, the unwinding rollers are running, and the negative electrode conveying mechanism The positive electrode conveying mechanism does not feed material. When the diaphragm joint belt passes through the first identification piece, the first identification piece issues an instruction, and the negative electrode conveying mechanism starts to convey the negative electrode sheet. The conveyed negative electrode sheet and the second negative electrode sheet are arranged at a second interval, and the subsequent adjacent multiple negative electrode sheets are arranged at the first interval. When the second interval downstream of the diaphragm joint belt passes through the second identification piece, the winding needle clamps the material belt, and the cutter cuts the second interval. The winding needle moves to the downstream of the cutter and starts to wind the waste rejection range. When the second interval upstream of the diaphragm joint belt passes through the second identification piece, after a preset time, the cutter cuts off the second interval, and the winding needle takes away the waste rejection range. After taking away the waste rejection range, the winding needle is reset to the upstream of the cutter, and then a new battery cell is stacked. Therefore, the stacked battery cell production device can promptly discover when the subsequent diaphragm is insufficient, stop the machine to replace the diaphragm, and remove the position with the diaphragm joint belt to avoid the situation of feeding too many negative and positive electrodes to the diaphragm and avoid waste of raw materials.

[0053] The present invention also provides a method for using a stacked battery cell production device, by arranging a surplus detection component, the surplus of the diaphragm on the unwinding tube is monitored at any time. When the surplus is less than that required for one battery cell, after the positive electrode sheet and the negative electrode sheet of the previous battery cell are conveyed, one more negative electrode sheet is conveyed. When the waste is subsequently rejected, the negative electrode sheet is used as an identification mark for rejection, thereby avoiding the situation where too many negative and positive electrode sheets are conveyed onto the diaphragm, thereby avoiding waste of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a structural schematic diagram of a laminated battery cell production device provided in an embodiment of the present invention;

[0055] Figure 2 It is a structural schematic diagram of the normal production and waste rejection process of the material strip provided by an embodiment of the present invention;

[0056] Figure 3 It is a flow chart of a method for using a laminated battery cell production device provided in an embodiment of the present invention;

[0057] Figure 4 is a detailed step flow chart of S60 provided in an embodiment of the present invention;

[0058] Figure 5 is a first state diagram of the material strip production provided by an embodiment of the present invention;

[0059] Figure 6 is a second state diagram of the material strip production provided by an embodiment of the present invention;

[0060] Figure 7 is a third state diagram of the material strip production provided by an embodiment of the present invention;

[0061] Figure 8 is a fourth state diagram of the material strip production provided by an embodiment of the present invention;

[0062] Fig. 9 This is the fifth state diagram of the material strip production provided by the embodiment of the present invention.

[0063] In the figure:

[0064] 10. Negative electrode conveying mechanism; 11. Negative electrode unwinding roller; 12. Negative electrode material belt; 13. Negative electrode encoding roller; 14. Negative electrode scanning camera; 15. Negative electrode cutting piece; 16. First feeding roller; 17. First waste rejection component; 171. First material blocking piece; 172. First material collecting piece; 18. Negative electrode sheet;

[0065] 20, unwinding roller; 21, diaphragm; 211, second interval; 212, first interval; 213, waste rejection range; 22, diaphragm joint;

[0066] 30. Residual detection parts;

[0067] 40. positive electrode conveying mechanism; 41. positive electrode unwinding roller; 42. positive electrode material belt; 43. positive electrode encoding roller; 44. positive electrode scanning camera; 45. positive electrode cutting piece; 46. second feeding roller; 47. second waste rejection assembly; 471. second material blocking piece; 472. second material collecting piece; 48. positive electrode sheet;

[0068] 51. First identification element; 52. Second identification element;

[0069] 61. first heat composite roller; 62. second heat composite roller; 63. first drive roller; 64. second drive roller;

[0070] 70. Cutter; 80. Rolling needle; 90. Material connection piece; 200. Stacking mechanism; 210. Complete battery cell. DETAILED DESCRIPTION

[0071] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0072] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0074] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0075] This embodiment provides a laminated battery cell production device, which can promptly detect that the subsequent diaphragm 21 is insufficient to produce a complete battery cell 210, thereby avoiding the situation where too many negative electrode sheets 18 and positive electrode sheets 48 are fed to the diaphragm 21, thereby avoiding the waste of raw materials. Figure 1 As 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 hot composite rollers 61. The two unwinding rollers 20 are respectively located on both sides of the negative electrode conveying mechanism 10. The unwinding rollers 20 are configured to unwind the separator 21 downstream. Each unwinding roller 20 is provided with a residual detection member 30 outside. The residual detection member 30 is used to detect the length of the remaining separator 21 on the unwinding roller 20. The negative electrode conveying mechanism 10 is configured to convey the negative electrode sheet 18 between the two separators 21 at different intervals, so as to convey the material belt downstream together with the two separators 21. The residual detection member 30 is connected to the negative electrode conveying mechanism 10 in communication; the two positive electrode conveying mechanisms 40 are located one by one downstream of the two unwinding rollers 20, and the positive electrode conveying mechanism 40 is configured to turn away from the negative electrode sheet 18 toward the corresponding separator 21. A positive electrode sheet 48 is placed on one side of 8, and the positive electrode sheets 48 placed by the two positive electrode conveying mechanisms 40 are arranged alternately; a first identification member 51 is arranged between the positive electrode conveying mechanism 40 on at least one side and the corresponding unwinding roller 20, and the first identification member 51 is configured to identify the engagement position of the unwinding roller 20 and is communicated with the negative electrode conveying mechanism 10 and the positive electrode conveying mechanism 40; two first thermal composite rollers 61 are respectively located on both sides of the material strip and are configured to heat the material strip; the 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; the cutter 70 and the winding needle 80 are located downstream of the second identification member 52, the cutter 70 is communicated with the second identification member 52 and can cut the material strip, the winding needle 80 can clamp the material strip and rotate, and the winding needle 80 can change the upstream and downstream positions relative to the cutter 70; the material connecting member 90 is located downstream of the cutter 70, and the material strip thermally composited with the positive electrode sheet 48 is stacked in the material connecting member 90.

[0076] The above-mentioned laminated battery cell production device, also see Figure 2, the negative electrode sheet 18 is conveyed between the two separators 21 by the negative electrode conveying mechanism 10. During normal production, when the negative electrode conveying mechanism 10 conveys the negative electrode sheet 18, the spacing between two adjacent negative electrode sheets 18 is the first spacing 212. The two positive electrode conveying mechanisms 40 alternately place the positive electrode sheets 48 on the side of the separator 21 away from the negative electrode sheet 18 downstream. The material strips are thermally composited together by the first hot composite roller 61, and the material strips are stacked in the material 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 discharged synchronously, and the remaining separators 21 are the same) is insufficient for production. When a complete battery cell is formed, the remaining detection member 30 sends a signal, and 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 a complete negative electrode sheet 18 of the battery cell, and then conveys another negative electrode sheet 18 which is arranged at a second interval 211 with the front negative electrode sheet 18, and the whole machine is stopped, and the two unwinding rollers 20 are connected to form a diaphragm connection belt 22 at the connection position of the new and old diaphragms 21. At this time, the unwinding roller 20 is running, and the negative electrode conveying mechanism 10 and the positive electrode conveying mechanism 40 do not feed. When the diaphragm When the connecting belt 22 passes through the first identification member 51, the first identification member 51 issues an instruction, and the negative electrode conveying mechanism 10 starts to convey the negative electrode sheet 18. The first negative electrode sheet 18 conveyed is arranged at the second interval 211 with the second negative electrode sheet 18, and the subsequent adjacent multiple negative electrode sheets 18 are arranged at the first interval 212. When the second interval 211 downstream of the diaphragm connecting belt 22 passes through the second identification member 52, the winding needle 80 clamps the material belt, and the cutter 70 cuts the second interval 211. The winding needle 80 moves to the downstream of the cutter 70 and starts to wind the waste rejection range 213. When the second interval 211 upstream of the diaphragm connecting belt 22 passes through the second identification member 52, the winding needle 80 clamps the material belt, and the cutter 70 cuts the second interval 211. The winding needle 80 moves to the downstream of the cutter 70 and starts to wind the waste rejection range 213. When the second interval 211 passes through the second identification piece 52, after a preset time, the cutter 70 cuts off the second interval 211, and the winding needle 80 takes away the waste range 213. After taking away the waste range 213, the winding needle 80 is reset to the upstream of the cutter 70, and then a new battery cell is stacked. Therefore, when the subsequent diaphragm 21 is insufficient, the stacked battery cell production device can promptly discover it, stop the machine to replace the diaphragm 21, and remove the position with the diaphragm connecting tape 22, so as to avoid the situation of sending too many negative electrode sheets 18 and positive electrode sheets 48 to the diaphragm 21, thereby avoiding waste of raw materials.

[0077] Optionally, the remaining amount detecting member 30 determines the amount of the remaining diaphragm 21 by detecting the thickness of the diaphragm 21 on the unwinding roller 20. In other embodiments, the remaining amount detecting member 30 may also obtain the amount of the remaining diaphragm 21 by other means, which are not limited here.

[0078] Optionally, among the multiple negative electrode sheets 18 in the same battery cell, the spacing distance between adjacent negative electrode sheets 18 is X1 (i.e., the first spacing 212), and the spacing 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 (i.e., the second spacing 211), and X2>X1. Since the spacing between two adjacent negative electrode sheets 18 in a battery cell is small enough, it is set to X2>X1, and the second identification member 52 is easier to identify.

[0079] Optionally, the first identification element 51 is a color code sensor, and the color of the membrane connecting strip 22 is different from the color of the membrane 21. Through the above configuration, the first identification element 51 can easily identify the membrane connecting strip 22 by simply setting the color of the membrane connecting strip 22 to be different from the color of the membrane 21.

[0080] Alternatively, if Figure 1 As shown, the negative electrode conveying mechanism 10 includes a negative electrode unwinding roller 11, a negative electrode encoding roller 13, a negative electrode scanning camera 14, a negative electrode cutting piece 15, a first feeding roller 16 and a first waste rejection component 17. The negative electrode unwinding roller 11 is configured to release a continuous negative electrode material strip 12; the negative electrode encoding roller 13 is located downstream of the negative electrode unwinding roller 11 and is configured to print a negative electrode code on the negative electrode material strip 12; the negative electrode scanning camera 14 is located downstream of the negative electrode encoding roller 13 and is configured to identify the negative electrode code and the defects of the negative electrode material strip 12; the negative electrode cutting piece 15 is located downstream of the negative electrode scanning camera 14 and is configured to cut the continuous negative electrode material strip 12 into individual negative electrode sheet 18; the first feeding roller 16 is located downstream of the negative electrode cutting piece 15, and is configured to sequentially convey the negative electrode sheet 18 downstream; the first waste rejection assembly 17 is located downstream of the first feeding roller 16, and the first waste rejection assembly 17 includes a first material blocking member 171 and a first material collecting member 172, the first material blocking member 171 is communicatively connected to the negative electrode scanning camera 14, and can be switched between a first position and a second position, the first material blocking member 171 at the first position allows the negative electrode sheet 18 to enter and be transported between the two diaphragms 21, and the first material blocking member 171 at the second position blocks the negative electrode sheet 18 and forces the negative electrode sheet 18 to enter the first material collecting member 172. Through the above-mentioned arrangement, the negative electrode encoding roller 13 can count the number of negative electrode sheets 18 outputted. For example, one battery cell requires the negative electrode conveying mechanism 10 to output N negative electrode sheets 18, and the number N is counted by the negative electrode encoding roller 13. When there is a defect, the corresponding negative electrode sheet 18 will enter the first material blocking member 171 instead of flowing into the downstream, thereby preventing the defective negative electrode sheets 18 from being made into battery cells and affecting the battery cell performance. When counting, the negative electrode encoding roller 13 will subtract the number of negative electrode sheets 18 entering the first material blocking member 171 to ensure that the number of negative electrode sheets 18 finally made into battery cells outputted to the downstream by the negative electrode conveying mechanism 10 is correct.

[0081] It should be noted that the negative electrode cutting piece 15 is only used to illustrate the cutting position. This structure is a prior art and will not be described in detail here.

[0082] Optionally, the first waste rejection assembly 17 further includes a first frame (not shown) and a first rotating driving member (not shown) mounted on the first frame, the first material stopper 171 is plate-shaped and connected to the output end of the first rotating driving member, and the first rotating driving member can drive the first material stopper 171 to rotate and switch between the first position and the second position. Through the above arrangement, the first rotating driving member drives the first material stopper 171 to rotate, so as to realize the switching of the first material stopper 171 between the first position and the second position. Among them, the first rotating driving member can be a servo motor.

[0083] Optionally, the positive electrode conveying mechanism 40 includes a positive electrode unwinding roller 41, a positive electrode encoding roller 43, a positive electrode scanning camera 44, a positive electrode cutting piece 45, a second feeding roller 46 and a second waste rejection component 47, wherein the positive electrode unwinding roller 41 is configured to release a continuous positive electrode material strip 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 strip 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 the defects of the positive electrode material strip 42; the positive electrode cutting piece 45 is located downstream of the positive electrode scanning camera 44 and is configured to cut the continuous positive electrode material strip 42 into a Cut into individual positive electrode sheets 48; the second feed roller 46 is located downstream of the positive electrode cutting piece 45, and is configured to sequentially convey the positive electrode sheets 48 downstream; the second waste rejection assembly 47 is located downstream of the second feed roller 46, the second waste rejection assembly 47 includes a second material blocking member 471 and a second material collecting member 472, the second material blocking member 471 is communicatively connected to the positive electrode scanning camera 44, and can be switched between a third position and a fourth position, the second material blocking member 471 at the third position allows the positive electrode sheet 48 to be placed on the diaphragm 21, and the second material blocking member 471 at the fourth position blocks the positive electrode sheet 48 and forces the positive electrode sheet 48 to enter the second material collecting member 472. Through the above-mentioned arrangement, the positive electrode encoding roller 43 can count the number of positive electrode sheets 48 outputted. For example, one battery cell requires the positive electrode conveying mechanism 40 to output M positive electrode sheets 48, and the number of 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 instead of flowing into the downstream, thereby preventing the defective positive electrode sheets 48 from being made into battery cells and affecting the battery cell performance. When counting, the positive electrode encoding roller 43 will subtract the number of positive electrode sheets 48 entering the second material blocking member 471 to ensure that the number of positive electrode sheets 48 finally made into battery cells outputted to the downstream by the positive electrode conveying mechanism 40 is correct.

[0084] Optionally, the second waste rejection assembly 47 further includes a second frame and a second rotating drive member mounted on the second frame, the second material stopper 471 is plate-shaped and connected to the output end of the second rotating drive member, and the second rotating drive member can drive the second material stopper 471 to rotate and switch between the third position and the fourth position. Through the above arrangement, the second rotating drive member drives the second material stopper 471 to rotate, so as to realize the switching of the second material stopper 471 between the third position and the fourth position. The second rotating drive member can be a servo motor.

[0085] Alternatively, if Figure 1 As shown, two second heat-combined rollers 62 are arranged upstream of the positive electrode conveying mechanism 40, and the two second heat-combined rollers 62 are configured to heat-combine the two separators 21 and the negative electrode sheet 18. Through the above arrangement, the second heat-combined rollers 62 first heat-combine the two separators 21 and the negative electrode sheet 18 located between the two separators 21, and as the material belt moves downstream, the first heat-combined roller 61 heat-combines the positive electrode sheet 48 with one more layer again, thereby each material sheet is fully heat-combined, preventing only one heat-combined roller from not fully heat-combining the material sheet.

[0086] Optionally, a first drive roller 63 is provided upstream of the cutter 70, and a second drive roller 64 is provided downstream of the cutter 70, and the winding needle 80 can stay between the cutter 70 and the first drive roller 63 or between the cutter 70 and the second drive roller 64. Through the above arrangement, the two drive rollers provide driving force for the material belt to prevent the material belt from slipping during operation, etc. At the same time, the first drive roller 63 is arranged before the cutter 70 to ensure that when the cutter 70 cuts the material belt, the tight state of the material belt is easy to cut, and the second drive roller 64 is arranged in front of the material receiving piece 90 to ensure that the material belt enters the material receiving piece 90 smoothly.

[0087] The battery cells in the material receiving member 90 are formed by stacking material strips by a stacking mechanism 200, which is a prior art and will not be described in detail here.

[0088] This embodiment also provides a method for using a laminated battery cell production device, which is applied to the laminated battery cell production device, such as Figure 3 As shown, the method for using the laminated battery cell production device includes:

[0089] S10: The remaining amount detection member 30 detects the length of the remaining diaphragm 21 on the unwinding roller 20;

[0090] S20: Determine whether the length of the remaining diaphragm 21 meets the usage of one battery cell. If the determination result is yes, execute S30; if the determination result is no, execute S40;

[0091] S30: The battery cell is in normal production. The status of the entire laminated battery cell production device can be found in Figure 5 ;

[0092] S40: After the negative electrode conveying mechanism 10 conveys enough negative electrode sheets 18 for one battery cell, it conveys another negative electrode sheet 18 at the second interval 211, and both the negative electrode conveying mechanism 10 and the positive electrode conveying mechanism 40 stop conveying;

[0093] S50: The whole machine is stopped, and the two unwinding rollers 20 are changed, and a joint position is formed between the two rolls of diaphragm 21 before and after the change of rolls; the processes of S40 and S50 refer to Figure 6 ;

[0094] S60: discarding the negative electrode sheet 18 that is spaced a second distance 211 from the previous negative electrode sheet 18 to the material strip at the joint position;

[0095] S70: Continue to produce battery cells and repeat S10.

[0096] The method of using the above-mentioned laminated battery cell production device is to set a residual detection part 30 to monitor the residual amount of the diaphragm 21 on the unwinding roller 20 at any time. When the residual amount is less than that required for one battery cell, after the positive electrode sheet 48 and the negative electrode sheet 18 of the previous battery cell are conveyed, one more negative electrode sheet 18 is conveyed. When the waste is subsequently rejected, the negative electrode sheet 18 is used as an identification mark for rejection, so as to avoid the situation of sending too many negative electrode sheets 18 and positive electrode sheets 48 onto the diaphragm 21, thereby avoiding waste of raw materials.

[0097] Optionally, in S30, normal production of the battery cell means that the negative electrode conveying mechanism 10 conveys the negative electrode sheet 18 between the two diaphragms 21 at the second interval 211, and then conveys multiple negative electrode sheets 18 at the first interval 212, and the two positive electrode conveying mechanisms 40 alternately place positive electrode sheets 48 on the material strip, and the material strip is stacked in the material receiving piece 90.

[0098] Specifically, if Figure 4 As shown, S60 includes:

[0099] S61: The second identification member 52 identifies the second interval 211 between the two negative electrode sheets 18, indicating that the production of the previous battery cell is completed;

[0100] S62: The winding needle 80 clamps the material strip, and the cutter 70 receives the information of the second identification element 52. After the last negative electrode sheet 18 of the previous battery cell passes through the cutter 70, the cutter 70 cuts the second interval 211;

[0101] S63: The winding needle 80 clamps the cut material strip and moves to the downstream of the cutter 70 to start winding the waste material;

[0102] S64: After the first identification member 51 identifies the joint position, the battery cell is produced normally and a second gap 211 is formed behind the joint position; (See S61-S66 for details) Figure 7 )

[0103] S65: The second identification member 52 identifies the second interval 211 behind the engagement position;

[0104] S66: The winding needle 80 stops rotating, and the cutter 70 receives the information of the second identification member 52 and cuts the material strip at the second interval 211 behind the joint position;

[0105] S67: The winding needle 80 retracts, and the operator or the automatic device removes the waste ( Figure 2 The waste rejection range 213 in the waste box is removed and placed in the waste box, and the winding needle 80 returns to the upstream of the cutter 70; (see S65-S67) Fig. 9 )

[0106] S68: Battery cell production continues.

[0107] Through the above-mentioned arrangement, the second identification member 52 is responsible for identifying the second interval 211 and instructing the cutter 70 and the winding needle 80 to move. During the waste rejection process, the second interval 211 manufactured in cooperation with the negative electrode conveying mechanism 10 can accurately identify the starting position and the ending position of the waste rejection range 213, instruct the cutter 70 to cut, and the winding needle 80 to collect the waste rejection range 213. There are only two negative electrode sheets 18 in the waste rejection range 213. Compared with the waste of 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 joint tape 22, which serves as an instruction for the subsequent negative electrode conveying mechanism 10 and the positive electrode conveying mechanism 40 to start normal production of battery cells again, thereby ensuring a tight production rhythm. In addition, the coordinated use of the second identification member 52 and the second interval 211 can also distinguish between the previous battery cell and the next battery cell during normal production of battery cells, thereby improving the automation of production.

[0108] It should be noted that after the second identification member 52 identifies the second interval 211, it takes a certain amount of time and distance for the second interval 211 to reach the position of the cutter 70, and the time and distance are automatically determined by the background system. In addition, between S67 and S68, the material strip passes through the second driving roller 64, driving the material strip to continue to move downstream.

[0109] Optionally, the second identification component 52 is a CCD camera.

[0110] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A laminated battery cell production device, characterized in that: include: A negative electrode conveying mechanism (10) and two unwinding rollers (20), the two unwinding rollers (20) are respectively located on both sides of the negative electrode conveying mechanism (10), the unwinding rollers (20) are configured to unwind a separator (21) downstream, each unwinding roller (20) is provided with a remaining quantity detection component (30), the remaining quantity detection component (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) at different intervals between the two separators (21), so as to convey the material belt downstream together with the two separators (21), and the remaining quantity detection component (30) is communicatively connected with the negative electrode conveying mechanism (10); Two positive electrode conveying mechanisms (40) are located downstream of the two unwinding rollers (20) in a one-to-one correspondence, and the positive electrode conveying mechanisms (40) are configured to place the positive electrode sheet (48) on the side of the corresponding separator (21) away from the negative electrode sheet (18), and the positive electrode sheets (48) placed by the two positive electrode conveying mechanisms (40) are arranged alternately; A first identification member (51), the first identification member (51) being arranged between the positive electrode conveying mechanism (40) on at least one side and the corresponding unwinding roller (20), the first identification member (51) being configured to identify the engagement position of the unwinding roller (20) and to be communicatively connected with the negative electrode conveying mechanism (10) and the positive electrode conveying mechanism (40); Two first hot composite rollers (61), respectively located on both sides of the material strip and configured to heat the material strip; a second identification member (52) located downstream of the first thermal composite roller (61) and configured to identify a 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 the material strip; the winding needle (80) can clamp the material strip and rotate; 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 thermally compounded with the positive electrode sheet (48) is stacked in the material receiving member (90).

2. The laminated battery cell production device according to claim 1, characterized in that: The first identification element (51) is a color mark sensor, and the two rolls of the diaphragm (21) on the same unwinding roller (20) are connected by a diaphragm connecting tape (22), and the color of the diaphragm connecting tape (22) is different from the color of the diaphragm (21).

3. The laminated battery production device according to claim 1, characterized in that: The negative electrode transport mechanism (10) comprises: A negative electrode unwinding roller (11) is configured to release a continuous negative electrode material strip (12); A negative electrode encoding 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 encoding roller (13) and configured to identify the negative electrode encoding and defects of the negative electrode material strip (12); A negative electrode cutting piece (15), located downstream of the negative electrode scanning camera (14) and configured to cut the continuous negative electrode material strip (12) into individual negative electrode sheets (18); A first feeding roller (16), located downstream of the negative electrode cutting piece (15), and configured to sequentially convey the negative electrode sheets (18) downstream; The first waste rejection component (17) is located downstream of the first feeding roller (16), and the first waste rejection component (17) includes a first material blocking member (171) and a first material collecting member (172). The first material blocking member (171) is connected to the negative electrode scanning camera (14) for communication, and can be switched between a first position and a second position. The first material blocking member (171) at the first position allows the negative electrode sheet (18) to enter and be transported between the two diaphragms (21), and the first material blocking member (171) at the second position blocks the negative electrode sheet (18) and forces the negative electrode sheet (18) to enter the first material collecting member (172).

4. The laminated battery cell production device according to claim 3, characterized in that: The first waste rejection assembly (17) further comprises a first frame and a first rotating driving member mounted on the first frame, the first material blocking member (171) being plate-shaped and connected to an output end of the first rotating driving member, the first rotating driving member being capable of driving the first material blocking member (171) to rotate and switch between the first position and the second position.

5. The laminated battery cell production device according to claim 1, characterized in that: The positive electrode transport mechanism (40) comprises: A positive electrode unwinding roller (41) configured to release a continuous positive electrode material strip (42); A positive electrode encoding roller (43), located downstream of the positive electrode unwinding roller (41) and configured to print a positive electrode encoding on the positive electrode material strip (42); A positive electrode scanning camera (44) located downstream of the positive electrode encoding roller (43) and configured to identify the positive electrode encoding and defects of the positive electrode strip (42); A positive electrode cutting unit (45), located downstream of the positive electrode scanning camera (44) and configured to cut the continuous positive electrode strip (42) into individual positive electrode sheets (48); A second feeding roller (46), located downstream of the positive electrode cutting piece (45), and configured to sequentially convey the positive electrode sheets (48) downstream; The second waste rejection component (47) is located downstream of the second feeding roller (46), and the second waste rejection component (47) includes a second material blocking member (471) and a second material collecting member (472). The second material blocking member (471) is communicatively connected to the positive electrode scanning camera (44) and can be switched between a third position and a fourth position. The second material blocking member (471) in the third position allows the positive electrode sheet (48) to be placed on the diaphragm (21), and the second material blocking member (471) in the fourth position blocks the positive electrode sheet (48) and forces the positive electrode sheet (48) to enter the second material collecting member (472).

6. The laminated battery core production device according to claim 5, characterized in that: The second waste rejection assembly (47) also includes a second frame and a second rotating driving member installed on the second frame, the second material blocking member (471) is plate-shaped and connected to the output end of the second rotating driving member, and the second rotating driving member can drive the second material blocking member (471) to rotate and switch between the third position and the fourth position.

7. The laminated battery core production device according to any one of claims 1 to 6, characterized in that: Two second heat-combining rollers (62) are arranged upstream of the positive electrode conveying mechanism (40), and the two second heat-combining rollers (62) are configured to heat-combine the two separators (21) and the negative electrode sheet (18).

8. The laminated battery core production device according to any one of claims 1 to 6, characterized in that: 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). The winding needle (80) can stay between the cutter (70) and the first driving roller (63) or between the cutter (70) and the second driving roller (64).

9. A method for using a laminated battery cell production device, characterized in that: Applied to the laminated battery cell production device according to any one of claims 1 to 8, the method for using the laminated battery cell production device comprises: S10: the remaining amount detection member (30) detects the length of the diaphragm (21) remaining on the unwinding roller (20); S20: determining whether the remaining length of the diaphragm (21) satisfies the usage of one battery cell. If the determination result is yes, executing S30; if the determination result is no, executing S40; S30: Normal production of battery cells; S40: after the negative electrode conveying mechanism (10) conveys enough negative electrode sheets (18) for one battery cell and then conveys another negative electrode sheet (18) at a second interval (211), both the negative electrode conveying mechanism (10) and the positive electrode conveying mechanism (40) stop conveying; S50: the entire machine is stopped, and the two unwinding rollers (20) are replaced, so that the two rolls of the diaphragm (21) before and after the replacement are formed at the joint position; S60: discarding the material strip from the negative electrode sheet (18) that is spaced apart from the previous negative electrode sheet (18) by the second spacing (211) to the joining position; S70: Continue to produce battery cells and repeat S10.

10. The method for using the laminated battery production device according to claim 9, characterized in that: The S60 includes: S61: the second identification element (52) identifies the second interval (211) between the two negative electrode sheets (18), indicating that the production of the previous battery cell has been completed; S62: the winding needle (80) clamps the material strip, the cutter (70) receives information from the second identification element (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); S63: the winding needle (80) clamps the cut material strip and moves to the downstream of the cutter (70) to start winding the waste material; S64: after the first identification member (51) identifies the joining position, the battery cell is produced normally and a second gap (211) is formed behind the joining position; S65: the second identification member (52) identifies the second interval (211) behind the engagement position; S66: the cutter (70) receives the information of the second identification member (52), and cuts the material strip at the second interval (211) behind the joining position; S67: The winding needle (80) retracts, the operator removes the waste material, and the winding needle (80) returns to the upstream of the cutter (70).

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