CN110994039A

CN110994039A - Composite lamination production line and composite lamination method

Info

Publication number: CN110994039A
Application number: CN201911360034.0A
Authority: CN
Inventors: 林万盛; 贺于波
Original assignee: Super Components Engineering Dongguan Ltd
Current assignee: Super Components Engineering Dongguan Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-04-10

Abstract

The invention relates to the technical field of lithium batteries, in particular to a composite lamination production line and a composite lamination method. Through positive visual positioning mechanism and negative visual positioning mechanism respectively just adjust the position of positive plate in the compound piece b, carry out accurate positioning in the position of negative plate in the compound piece a of burden, coincide with compound piece an of N +1 burden and compound piece b of N positive according to the lamination law again and improved the counterpoint accuracy of positive plate and negative plate in the electric core, and then improved the quality of compound lamination electric core, the efficient of lamination has improved the efficiency of production compound lamination electric core.

Description

Composite lamination production line and composite lamination method

Technical Field

The invention relates to the technical field of lithium batteries, in particular to a composite lamination production line and a composite lamination method.

Background

The traditional laminated battery core is mainly manufactured by three lamination modes, namely a Z-shaped lamination, a bag-making lamination and a composite lamination. The Z-shaped lamination is a battery cell which is made by alternately laminating positive and negative pole pieces repeatedly and separating diaphragms from the positive and negative pole pieces at intervals, the battery cell has low impedance, but the pole pieces are easy to dislocate to cause short circuit, and the battery prepared by the battery cell has poor safety. The manufacture of the lamination sheets is generally to align the upper and lower surfaces of the positive pole pieces with the diaphragm, to form the positive pole piece bags after hot pressing on the periphery, and then to repeatedly and alternately laminate with the negative pole. The composite lamination is an electric core which is manufactured by integrally hot-pressing and compounding a lower diaphragm, a negative plate, an upper diaphragm and a positive plate after circulating and laminating, the efficiency of producing the electric core by the lamination mode is lower as that of Z-shaped lamination and bag-making lamination, the requirement of the current new energy market on the rapid growth of the power battery is difficult to meet, and the accurate alignment of the positive and negative plates is difficult to ensure. Therefore, the drawbacks are obvious, and a solution is needed.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a composite lamination production line and a composite lamination method, wherein the positive and negative pole pieces are accurately aligned, and the battery core is high in production efficiency and good in quality.

In order to achieve the purpose, the invention adopts the following technical scheme:

a composite lamination production line comprises a positive electrode semi-composite device for compounding a positive plate and a diaphragm, a negative electrode semi-composite device for compounding a negative plate and the diaphragm, a positive electrode conveying device arranged at the discharge end of the positive electrode semi-composite device, a negative electrode conveying device arranged at the discharge end of the negative electrode semi-composite device, a positive electrode transfer mechanism for transferring a positive composite plate b formed by the positive electrode semi-composite device to the positive electrode conveying device, a negative electrode transfer mechanism for transferring a negative composite plate a formed by the negative electrode semi-composite device to the negative electrode conveying device, a lamination table movably arranged between the negative electrode conveying device and the positive electrode conveying device, a positive electrode visual positioning mechanism arranged on the positive electrode conveying device and used for visually positioning the positive composite plate b conveyed by the positive electrode conveying device, a negative electrode visual positioning mechanism arranged on the negative electrode conveying device and used for visually positioning a negative composite plate a conveyed by the negative electrode conveying device, a positioning mechanism arranged on the negative electrode conveying device, The laminating machine is used for transferring the negative composite sheet a and the positive composite sheet b to the laminating table to be laminated so as to form a laminating mechanical arm of a primary battery cell, a cladding device used for cladding the primary battery cell so as to form the battery cell, a hot pressing machine used for carrying out hot pressing on the battery cell and a trimming device used for trimming the battery cell after the hot pressing, and the positive visual positioning mechanism and the negative visual positioning mechanism are both electrically connected with the laminating table.

Further, the coating device comprises a cover storage device for storing a bottom cover c and a top cover d and an end cover visual positioning mechanism arranged on the cover storage device and used for visually positioning the bottom cover c or/and the top cover d, the bottom cover c, the negative composite sheet a, the positive composite sheet b and the top cover d are transferred to a lamination table by a lamination manipulator according to the lamination sequence to be laminated to form a battery cell, and the end cover visual positioning mechanism is electrically connected with the lamination table.

Further, the cladding device is a cladding machine, and the cladding machine is positioned between the laminating table and the hot pressing machine.

Further, the positive electrode semi-composite device or/and the negative electrode semi-composite device comprises a semi-composite frame, a pre-pressing roller rotatably arranged on the semi-composite frame, a semi-composite hot-pressing mechanism arranged at the discharge end of the pre-pressing roller, a vacuum traction mechanism arranged at the discharge end of the semi-composite hot-pressing mechanism and used for drawing the diaphragm to move, a cutting mechanism arranged at the discharge end of the vacuum traction mechanism and used for cutting the diaphragm, and a semi-composite conveying device arranged at the discharge end of the cutting mechanism.

Further, a pre-storage mechanism is arranged between the vacuum traction mechanism and the cutting mechanism.

Furthermore, the trimming device comprises a trimming platform, a movable driving mechanism for driving the trimming platform to move, a laser cutting machine positioned above the trimming platform, a trimming visual positioning mechanism positioned above the trimming platform and a material suction device arranged on the trimming platform and used for sucking waste materials, wherein the trimming visual positioning mechanism is electrically connected with the movable driving mechanism.

Further, the composite lamination production line further comprises a first material moving manipulator and a circuit testing device for performing circuit testing on the trimmed battery cell, wherein the first material moving manipulator is used for transferring the trimmed battery cell to the circuit testing device or outputting the battery cell tested by the circuit testing device.

The composite lamination production line further comprises a first product storage device, a weighing device, a second material moving mechanical arm, a second product storage device, a code printing device and a packaging machine, wherein the first material moving mechanical arm is used for transferring defective electric cores detected by the circuit testing device to the first product storage device, the second material moving mechanical arm is used for transferring non-defective electric cores detected by the circuit testing device to the weighing device, the first material moving mechanical arm and the second material moving mechanical arm are electrically connected with the circuit testing device, the second material moving mechanical arm transfers defective electric cores weighed by the weighing device to the second product storage device, transfers non-defective electric cores weighed by the weighing device to the code printing device or transfers electric cores printed by the code printing device to the packaging machine, and the second material moving mechanical arm is electrically connected with the weighing device.

The invention also provides a composite lamination method, which comprises the following steps:

the method comprises the following steps that firstly, a positive plate is pre-pressed on a diaphragm, so that the positive plate is attached to the diaphragm, the positive plate is thermally pressed on the diaphragm in a thermal pressing mode, and the diaphragm with the positive plate in the thermal pressing mode is cut into a single compact positive composite sheet b; prepressing a negative plate on the diaphragm to enable the negative plate to be attached to the diaphragm, thermally pressing the negative plate on the diaphragm in a thermal pressing mode, and cutting the diaphragm with the negative plate through a single compact negative composite sheet a;

visually positioning the position of the bottom cover c, the position of the negative plate in the negative composite sheet a on the diaphragm, the position of the positive plate in the positive composite sheet b on the diaphragm and the position of the top cover d in a CCD visual positioning mode;

thirdly, the lamination table carries out position adjustment on the result shot by the position of the bottom cover c according to CCD visual positioning, and the lamination manipulator picks up the bottom cover c to the accurate position of the lamination table;

fourthly, the lamination table carries out position adjustment on a result shot by the position of the negative plate in the negative composite sheet a according to CCD visual positioning, and the lamination manipulator picks up the negative composite sheet a to the accurate position of the bottom cover c borne by the lamination table;

fifthly, the lamination table carries out position adjustment according to the result shot by the CCD visual positioning on the position of the positive plate in the positive composite sheet b, and the lamination manipulator picks up the positive composite sheet b to the accurate position of the negative composite sheet a borne by the lamination table so as to enable the positive plate in the positive composite sheet b to align with the negative plate in the negative composite sheet a;

step six, repeating the step four and the step five for cyclic superposition, and alternately superposing the N +1 negative composite sheets a and the N positive composite sheets b to enable the last negative composite sheet a to be positioned on the topmost surface;

seventhly, the lamination table carries out position adjustment on the shot result of the position of the top cover d according to CCD visual positioning, and the lamination manipulator picks up the top cover d to the accurate position of the last negative composite sheet a borne by the lamination table so as to form a preliminarily molded battery cell;

step eight, carrying out hot-pressing and shaping on the preliminarily molded battery cell through a hot-pressing machine to form a compact battery cell;

placing the electric core subjected to hot pressing and shaping on a trimming platform, shooting the electric core subjected to hot pressing and shaping in a CCD visual positioning mode, carrying out position adjustment on a result shot by the trimming platform according to the CCD visual positioning on the electric core subjected to hot pressing and shaping, simultaneously cutting redundant diaphragm waste materials around the electric core by a laser cutting machine to form a composite laminated electric core, and sucking the cut diaphragm waste materials by a material sucking device;

step ten, performing circuit test on the composite laminated battery cell to remove the composite laminated battery cell unqualified in the circuit test;

step eleven, weighing and measuring the composite laminated battery cell qualified in circuit test so as to eliminate the composite laminated battery cell with wrong laminated quantity;

and step twelve, coding and packaging the composite laminated battery cell qualified in the weighing measurement to form a final battery cell.

secondly, visually positioning the position of the negative plate in the negative composite sheet a on the diaphragm and the position of the positive plate in the positive composite sheet b on the diaphragm in a CCD visual positioning mode;

thirdly, the lamination table adjusts the position of a result shot by the position of a negative plate in the negative composite sheet a according to the CCD visual positioning, and the lamination manipulator picks up the negative composite sheet a to the accurate position of the lamination table;

fourthly, the lamination table carries out position adjustment on a result shot by the position of the positive plate in the positive composite sheet b according to CCD visual positioning, and the lamination manipulator picks up the positive composite sheet b to the accurate position of the negative composite sheet a borne by the lamination table so as to enable the positive plate in the positive composite sheet b to align with the negative plate in the negative composite sheet a;

step five, repeating the step three and the step four for cyclic superposition, and alternately superposing the N +1 negative composite sheets a and the N positive composite sheets b to enable the last negative composite sheet a to be positioned on the topmost surface so as to form a primary battery core;

step six, coating the primary battery cell with the diaphragm by a coating machine to form a preliminarily molded battery cell;

step seven, carrying out hot-pressing and shaping on the preliminarily molded battery cell through a hot-pressing machine to form a compact battery cell;

step nine, carrying out circuit testing on the composite laminated battery cell to remove the composite laminated battery cell unqualified in circuit testing;

step ten, weighing and measuring the composite laminated battery cell qualified in the circuit test so as to eliminate the composite laminated battery cell with wrong laminated quantity;

and step eleven, coding and packaging the composite laminated battery cell qualified in the weighing measurement to form a final battery cell.

The invention has the beneficial effects that: according to the invention, the position of the positive plate in the positive composite sheet b and the position of the negative plate in the negative composite sheet a are accurately positioned through the positive visual positioning mechanism and the negative visual positioning mechanism respectively, then the N +1 negative composite sheets a and the N positive composite sheets b are overlapped according to the lamination rule to form a primary battery core, and finally the primary battery core is coated and thermally pressed to form the battery core, so that the alignment accuracy of the positive plate and the negative plate in the battery core is improved, the quality of the composite laminated battery core is further improved, the composite laminated battery core is safe to use and long in service life, the lamination efficiency is high, and the efficiency of producing the composite laminated battery core is improved.

Drawings

Fig. 1 is a top view of a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a semi-composite thermal compression mechanism according to the present invention.

Fig. 3 is a schematic structural diagram of a composite laminated cell according to the first embodiment.

Fig. 4 is a top view of a second embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a composite laminated cell according to a second embodiment.

Description of reference numerals:

1. a positive semi-compound device; 11. a semi-composite frame; 12. pre-pressing rollers; 13. a semi-composite thermal compression mechanism; 131. a heat conductive conveyor belt; 132. a hot press roll; 14. a vacuum drawing mechanism; 15. a cutting mechanism; 16. a semi-compound conveying device; 17. a pre-storage mechanism; 171. pre-storing a material roller; 172. a lift drive; 2. a negative semi-compound device; 3. a positive electrode transfer device; 31. a negative electrode conveying device; 4. a positive electrode transfer mechanism; 41. a negative electrode transfer mechanism; 5. a cap storage device; 51. an end cover visual positioning mechanism; 6. a lamination table; 61. a lamination manipulator; 62. a positioning table; 63. a rotating and moving device; 7. a positive visual positioning mechanism; 71. a negative visual positioning mechanism; 8. a hot pressing machine; 80. a rubberizing device; 81. a first material moving manipulator; 82. a circuit testing device; 83. a first secondary product reservoir; 84. a weighing device; 85. a second material moving manipulator; 86. a second product reservoir; 87. a code printing device; 88. a packaging machine; 9. a trimming device; 91. trimming platform; 92. a movement drive mechanism; 93. a laser cutter; 94. trimming visual positioning mechanism; 95. a material suction device; 96. a cladding machine.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

The first embodiment.

As shown in fig. 1 to 3, the present invention provides a composite lamination production line, which comprises a positive electrode semi-composite device 1 for compositing a positive electrode sheet and a diaphragm, a negative electrode semi-composite device 2 for compositing a negative electrode sheet and a diaphragm, a positive electrode conveying device 3 disposed at a discharge end of the positive electrode semi-composite device 1, a negative electrode conveying device 31 disposed at a discharge end of the negative electrode semi-composite device 2, a positive electrode transferring mechanism 4 for transferring a positive composite sheet b formed by the positive electrode semi-composite device 1 to the positive electrode conveying device 3, a negative electrode transferring mechanism 41 for transferring a negative composite sheet a formed by the negative electrode semi-composite device 2 to the negative electrode conveying device 31, a lamination table 6 movably disposed between the negative electrode conveying device 31 and the positive electrode conveying device 3, a positive electrode visual positioning mechanism 7 disposed at the positive electrode conveying device 3 for visually positioning the positive composite sheet b conveyed by the positive electrode conveying device 3, a positioning mechanism 7, The cathode visual positioning mechanism 71 is arranged on the cathode conveying device 31 and used for visually positioning the negative composite sheet a conveyed by the cathode conveying device 31, the laminating manipulator 61 is used for transferring the negative composite sheet a and the positive composite sheet b to the laminating table 6 to be laminated to form a primary cell, the coating device is used for coating the primary cell to form the cell, the hot pressing machine 8 is used for hot pressing the cell, and the trimming device 9 is used for trimming the hot pressed cell, wherein the cathode visual positioning mechanism 7 and the cathode visual positioning mechanism 71 are electrically connected with the laminating table 6; specifically, the coating device comprises a cover storage device 5 for storing a bottom cover c and a top cover d and an end cover visual positioning mechanism 51 arranged on the cover storage device 5 and used for visually positioning the bottom cover c or/and the top cover d, the bottom cover c, the negative composite sheet a, the positive composite sheet b and the top cover d are transferred to a lamination table by a lamination manipulator 61 according to the lamination sequence to be laminated to form a battery cell, and the end cover visual positioning mechanism 51 is electrically connected with the lamination table 6; preferably, in order to facilitate the addition of a bottom cover c or a top cover d to the lid magazine 5 by the operator, said lid magazine 5 is located on the side of the negative electrode conveyor 31 remote from the positive electrode conveyor 3. In this embodiment, the upper surface and the lower surface of the diaphragm are coated with glue or adhesive layers.

In actual work, the positive electrode semi-compound device 1 presses a positive electrode sheet on a diaphragm and forms a compact positive compound sheet b, the negative electrode semi-compound device 2 presses a negative electrode sheet on the diaphragm and forms a compact negative compound sheet a, the positive electrode transfer mechanism 4 transfers the positive compound sheet b to the positive electrode conveying device 3, the negative electrode transfer mechanism 41 transfers the negative compound sheet a to the negative electrode conveying device 31, the end cover visual positioning mechanism 51 visually positions the position of a bottom cover c in the cover storage device 5, the end cover visual positioning mechanism 51 feeds the visually positioned result back to the laminating table 6, so that the laminating table 6 rotates to a set angle and moves to a set position, the laminating manipulator 61 picks up the bottom cover c on the cover storage device 5 to the laminating table 6, and the positive electrode visual positioning mechanism 7 visually positions the positive electrode sheet on the positive compound sheet b conveyed by the positive electrode conveying device 3, the negative visual positioning mechanism 71 visually positions the positions of the negative pole pieces on the negative compound sheets a conveyed by the negative pole conveying device 31, the negative visual positioning mechanism 71 and the positive visual positioning mechanism 7 feed the visually positioned results back to the laminating table 6 in sequence, the laminating manipulator 61 picks the negative compound sheets a conveyed by the negative pole conveying device 31 up to the bottom cover c of the laminating table 6, the laminating manipulator 61 picks the positive compound sheets b conveyed by the positive pole conveying device 3 up to the positive compound sheets b on the laminating table 6, the laminating manipulator 61 alternately laminates the N +1 negative compound sheets a and the N positive compound sheets b according to the circulating alternate laminating mode of the negative compound sheets a and the positive compound sheets b, the negative compound sheets a are positioned on the topmost surface, the end cover visual positioning mechanism 51 visually positions the top cover d in the cover storage device 5, the end cover visual positioning mechanism 51 feeds the visually positioned results back to the laminating table 6, the lamination table 6 is made to rotate to a set angle and move to a set position, the lamination manipulator 61 picks up the top cover d on the cover storage device 5 to the lamination table 6, the top cover d is located on the topmost negative composite sheet a to form a battery cell, the lamination manipulator 61 transfers the battery cell on the lamination table 6 to the hot press 8, the hot press 8 presses and molds the battery cell to form a compact battery cell, the lamination manipulator 61 transfers the pressed and molded battery cell to the trimming device 9, and the trimming device 9 trims the pressed and molded battery cell, wherein the trimming refers to trimming of redundant diaphragm edges in the pressed and molded battery cell to form a composite lamination battery cell. According to the invention, the position of the positive plate in the positive composite sheet b, the position of the negative plate in the negative composite sheet a and the position of the bottom cover c/top cover d are accurately positioned through the positive visual positioning mechanism 7, the negative visual positioning mechanism 71 and the end cover visual positioning mechanism 51 respectively, and then the bottom cover c, the N +1 negative composite sheets a, the N positive composite sheets b and the top cover d are superposed according to the lamination rule, so that the contraposition accuracy of the positive plate and the negative plate in the battery cell is improved, the quality of the composite laminated battery cell is further improved, the composite laminated battery cell is safe to use and long in service life, the lamination efficiency is high, and the efficiency of producing the composite laminated battery cell is improved.

N is a positive integer, and the number of N is determined according to actual production requirements.

Specifically, the positive electrode transfer mechanism 4 and the negative electrode transfer mechanism 41 are both manipulators.

In this embodiment, the positive electrode semi-compound device 1 or/and the negative electrode semi-compound device 2 includes a semi-compound frame 11, a pre-pressing roller 12 rotatably disposed on the semi-compound frame 11, a semi-compound thermal compression mechanism 13 disposed at a discharging end of the pre-pressing roller 12, a vacuum drawing mechanism 14 disposed at a discharging end of the semi-compound thermal compression mechanism 13 and used for drawing the diaphragm to move, a cutting mechanism 15 disposed at a discharging end of the vacuum drawing mechanism 14 and used for cutting the diaphragm, and a semi-compound conveying device 16 disposed at a discharging end of the cutting mechanism 15. Preferably, the vacuum pulling mechanism 14 is a vacuum conveyor belt. Preferably, the structure of the positive electrode semi-composite device 1 is the same as that of the negative electrode semi-composite device 2, and therefore, the positive composite sheet b produced by the positive electrode semi-composite device 1 is taken as an example in this embodiment.

In actual work, the vacuum traction mechanism 14 pulls the diaphragm to move along the processing sequence of the positive composite sheets b, the positive electrode sheets are placed on the diaphragm, then the prepressing roller 12 prepresses the positive electrode sheets on the diaphragm, so that the positive electrode sheets are attached to the diaphragm, the positive electrode sheets move along with the diaphragm, the stability of the positive electrode sheets on the diaphragm is improved, the position deviation of the positive electrode sheets in the conveying process is avoided, when the positive electrode sheets and the diaphragm move to the semi-composite hot-pressing mechanism, the semi-composite hot-pressing mechanism performs hot-pressing forming on the positive electrode sheets and the diaphragm, so that the positive electrode sheets and the diaphragm are firmly connected, then the cutting mechanism 15 cuts the diaphragm after hot-pressing into single positive composite sheets b, each positive composite sheet b is conveyed to a set position through the semi-composite conveying device 16, and the positive composite sheets b are transferred to the positive electrode conveying device 3 through the positive electrode transfer mechanism 4. The positive electrode semi-composite device 1 and the negative electrode semi-composite device 2 work synchronously and respectively form a positive composite sheet b and a negative composite sheet a, so that the efficiency of producing the positive composite sheet b and the negative composite sheet a is improved, and the lamination efficiency is further improved.

In this embodiment, a pre-storage mechanism 17 is disposed between the vacuum traction mechanism 14 and the cutting mechanism 15, the pre-storage mechanism 17 includes a pre-storage roller 171 disposed in the semi-composite frame 11 in a lifting manner and a lifting driver 172 disposed in the semi-composite frame 11 and used for driving the pre-storage roller 171 to lift, a plurality of material guide rollers are disposed on both sides of the pre-storage roller 171, the material guide rollers are rotatably disposed in the semi-composite frame 11, and the diaphragm is wound around the bottom of the pre-storage roller 171 through the material guide roller on one side of the pre-storage roller 171 and then output through the material guide roller on the other side of the pre-storage roller 171; specifically, the lifting driver 172 is an air cylinder or a transmission structure that a motor drives a lead screw and a nut.

When the cutting mechanism 15 cuts the diaphragm after hot pressing, the conveying of the diaphragm needs to be stopped for a short time (i.e. the diaphragm with the positive plate is conveyed to the cutting mechanism 15 intermittently), but the pre-pressing process and the hot pressing process of the positive plate and the diaphragm are continuously carried out, in order to match the processing speed difference of the front end and the rear end in the positive semi-composite device 1, improve the production efficiency and protect the vacuum traction mechanism 14, and avoid the damage or the reduction of the service life caused by the frequent switching between starting and stopping of the vacuum traction mechanism 14, the vacuum traction mechanism 14 needs to continuously pull the diaphragm, the diaphragm with the positive plate after hot pressing is pre-stored by arranging the pre-storage mechanism 17 between the vacuum traction mechanism 14 and the cutting mechanism 15 (the pre-storage means that the vacuum traction mechanism 14 is supplied to the cutting mechanism 15, but the cutting mechanism 15 is not as long as the diaphragm with the positive composite plate b after hot pressing is cut), so as to ensure that the front end and the rear end of the positive electrode semi-compound device 1 can work normally on the basis of no shutdown. When the pre-storing mechanism 17 is required to pre-store the diaphragm with the positive plate in a hot-pressed manner, the lifting driver 172 drives the pre-storing roller 171 to move downwards, and the downwards-moving pre-storing roller 171 drives the diaphragm to move downwards so as to pre-store the diaphragm; when it is necessary to release the diaphragm, the lift driver 172 drives the pre-feed roller 171 to move up, and the pre-feed roller 171 moves up to release the portion of the diaphragm of the pre-feed so that the portion of the diaphragm is fed to the cutting mechanism 15.

In this embodiment, the semi-composite thermal compression mechanism 13 includes two heat-conducting conveyor belts 131 arranged oppositely, and a plurality of thermal compression rollers 132 arranged in a linear arrangement are disposed in each heat-conducting conveyor belt 131; in actual operation, heat carried by the hot-pressing roller 132 is transferred to the heat-conducting conveyor belts 131, the positive electrode plate and the diaphragm pass through between the two heat-conducting conveyor belts 131, and the two heat-conducting conveyor belts 131 cooperate to thermally press the positive electrode plate on the diaphragm and convey the positive electrode plate. The vacuum traction mechanism 14 is adopted to draw the diaphragm with the positive plate through hot pressing, because the lower surface of the diaphragm also has viscosity, the lower surface of the diaphragm is easily adhered to the heat conduction conveying belt 131 and circularly moves along with the heat conduction conveying belt 131, the diaphragm with the positive plate through hot pressing is sucked by the vacuum traction mechanism 14 and is pulled to move, the situations can be effectively avoided, and the normal movement of the diaphragm is ensured.

Preferably, the heat conduction conveyor belt 131 is made of stainless steel materials, so that the heat transfer effect is good, and the efficiency and the quality of the positive plate hot-pressed on the diaphragm are improved.

In this embodiment, the lamination table 6 includes a positioning table 62 and a rotation device 63 for driving the positioning table 62 to rotate and move, and the positive visual positioning mechanism 7, the negative visual positioning mechanism 71 and the end cover visual positioning mechanism 51 are all electrically connected to the rotation device 63. Specifically, the rotating device 63 includes a rotating driver, a first traverse driving mechanism and a first longitudinal driving mechanism, the positioning table 62 is installed at an output end of the rotating driver, the rotating driver is installed at an output end of the first traverse driving mechanism, the first traverse driving mechanism is installed at an output end of the first longitudinal driving mechanism, the rotating driver may adopt a rotating cylinder, and both the first traverse driving mechanism and the first longitudinal driving mechanism may adopt a transmission structure in which a motor drives a screw rod and a nut. The invention adopts the lamination table 6 to move freely (move and rotate in the horizontal plane) to adjust the relative position of the negative composite sheet a relative to the bottom cover c, the relative position of the positive composite sheet b relative to the negative composite sheet a, the relative position of the negative composite sheet a relative to the positive composite sheet b and the relative position of the top cover d relative to the negative composite sheet a so as to ensure the precision of lamination, so that the lamination manipulator 61 does not need to frequently adjust the positions for picking up the positive composite sheet b, the negative composite sheet a, the bottom cover c and the top cover d, and the positions for picking up materials at each time are the same.

In this embodiment, the trimming device 9 includes a trimming table 91, a moving driving mechanism 92 for driving the trimming table 91 to move, a laser cutting machine 93 located above the trimming table 91, a trimming visual positioning mechanism 94 located above the trimming table 91, a material suction device 95 installed on the trimming table 91 and used for sucking waste materials, and a third material transferring manipulator for transferring the electric core carried by the hot press 8 to the trimming table 91, where the trimming visual positioning mechanism 94 is electrically connected to the moving driving mechanism 92; specifically, the moving driving mechanism 92 includes a second traverse driving mechanism and a second longitudinal driving mechanism, both the second traverse driving mechanism and the second longitudinal driving mechanism can adopt a transmission structure of a motor driving a lead screw and a nut, and in order to reduce the burden of the lamination manipulator 61 and improve the production efficiency, the third material moving manipulator is further configured to transfer the preliminarily formed battery cell after lamination is completed to the hot press 8.

The lamination manipulator 61 picks up the thermally pressed battery cell to the trimming table 91 of the trimming device 9, then the trimming visual positioning mechanism 94 performs visual positioning on the battery cell carried by the trimming table 91, the trimming visual positioning mechanism 94 feeds back the visual positioning result to the moving driving mechanism 92, so that the moving driving mechanism 92 drives the trimming table 91 to move according to the trimming track of the battery cell, the laser cutting machine 93 performs laser cutting and trimming on the battery cell carried by the trimming table 91, so as to cut off redundant diaphragms around the battery cell, thereby forming a composite lamination battery cell, and the suction device 95 adsorbs trimmed diaphragm waste materials while performing laser cutting, so that the diaphragm waste materials can be timely collected, the random scattering of the diaphragm waste materials is avoided, the trimming work can be normally performed, the trimming efficiency and quality are improved, and the working environment is kept clean.

In this embodiment, the composite lamination production line further includes a first material transferring manipulator 81 and a circuit testing device 82 for performing a circuit test on the trimmed battery cell, the first material transferring manipulator 81 is configured to transfer the trimmed battery cell to the circuit testing device 82 or output the battery cell tested by the circuit testing device 82, the composite lamination production line further includes a first secondary product storage 83, a weighing device 84, and a second material transferring manipulator 85, the first material transferring manipulator 81 is configured to transfer a defective battery cell detected by the circuit testing device 82 to the first secondary product storage 83, the second material transferring manipulator 85 is configured to transfer a non-defective battery cell detected by the circuit testing device 82 to the weighing device 84, and both the first material transferring manipulator 81 and the second material transferring manipulator 85 are electrically connected to the circuit testing device 82; the composite lamination production line further comprises a second secondary product storage 86, a code printing device 87 and a packaging machine 88, the second material moving manipulator 85 transfers defective cells weighed by the weighing device 84 to the second secondary product storage 86, transfers non-defective cells weighed by the weighing device 84 to the code printing device 87 or transfers coded cells printed by the code printing device 87 to the packaging machine 88, and the second material moving manipulator 85 is electrically connected with the weighing device 84.

During actual work, the first material moving manipulator 81 transfers the trimmed battery cell carried by the trimming table 91 to the circuit testing device 82, the circuit testing device 82 performs circuit testing (such as short circuit testing, voltage testing, current testing and the like) on the battery cell, and when the circuit testing device 82 detects that the battery cell is a defective product, the first material moving manipulator 81 transfers the defective battery cell to the first secondary product storage 83 and recovers the defective battery cell through the first defective product storage 83; when the circuit testing device 82 detects that the battery core is good, the second material moving manipulator 85 transfers the good battery core to the weighing device 84, the battery core is weighed by the weighing device 84, when the weight of the battery core is equal to a set weight value, the battery core is qualified after the stacking number of the battery core is correct, the second material moving manipulator 85 transfers the qualified battery core to the code printing device 87, the code printing device 87 prints codes (such as bar codes or two-dimensional codes) on the qualified battery core, and finally the second material moving manipulator 85 transfers the coded battery core to the packaging machine 88 and packages the battery by the packaging machine 88; when the weight of the battery cell is greater than or less than the set weight value, it is proved that the number of the lamination sheets of the battery cell is wrong, the battery cell is unqualified, the second material moving manipulator 85 transfers the unqualified battery cell to the second secondary product storage 86, and the unqualified battery cell is recovered through the second unqualified product storage 86. The structural design ensures the quality of the composite laminated battery on one hand, and realizes the integration of circuit detection, defective product removal, weighing measurement, defective product removal, code printing and packaging of the composite laminated battery cell on the other hand, thereby improving the production efficiency of the composite laminated battery cell.

In this embodiment, the number of the lamination tables 6 and the number of the lamination robots 61 are at least two, preferably, the number of the lamination tables 6 and the number of the lamination robots 61 are two to four, the number of the heat press machines 8 is plural, and the number of the heat press machines 8 is three. This structural design has rationally utilized the required processing time difference of different stations to carry out reasonable layout, has further improved the efficiency of production composite lamination electricity core.

Preferably, a gluing device 80 is arranged between the weighing device 84 and the code printing device 87, and by additionally pasting U-shaped glue around the composite laminated battery cell, the structural stability of the composite laminated battery cell is ensured, the hardness and the quality of the composite laminated battery cell are improved, and the service life of the composite laminated battery cell is prolonged.

Specifically, the positive visual positioning mechanism 7, the negative visual positioning mechanism 71, the end cover visual positioning mechanism 51 and the trimming visual positioning mechanism 94 all adopt CCD visual mechanisms, and the positive conveying device 3 and the negative conveying device 31 can both adopt vacuum conveyor belts.

A composite lamination method that can be used in the composite lamination production line of the first embodiment, comprising the steps of:

the method comprises the following steps that firstly, a pre-pressing roller 12 is used for pre-pressing a positive plate on a diaphragm, so that the positive plate is attached to the diaphragm, a semi-composite hot-pressing mechanism 13 is used for hot-pressing the positive plate on the diaphragm in a hot-pressing mode, and a cutting mechanism 15 is used for cutting the diaphragm on which the positive plate is hot-pressed into a single compact positive composite sheet b; prepressing the negative plate on the diaphragm through a prepressing roller 12 to enable the negative plate to be attached to the diaphragm, thermally pressing the negative plate on the diaphragm through a semi-composite thermal pressing mechanism 13 in a thermal pressing mode, and cutting the diaphragm with the negative plate through a cutting mechanism 15 to obtain a single compact negative composite sheet a;

secondly, visually positioning the position of the bottom cover c, the position of the negative plate in the negative composite sheet a on the diaphragm, the position of the positive plate in the positive composite sheet b on the diaphragm and the position of the top cover d by adopting the end cover visual positioning mechanism 51, the negative visual positioning mechanism 71, the positive visual positioning mechanism 7 and the end cover visual positioning mechanism 51 in a CCD visual positioning mode respectively;

thirdly, the lamination table 6 adjusts the position of the bottom cover c according to the result shot by the CCD visual positioning (end cover visual positioning mechanism 51), and the lamination manipulator 61 picks up the bottom cover c to the accurate position of the lamination table 6;

fourthly, the lamination table 6 adjusts the position of the negative plate in the negative composite sheet a according to the result of the position shooting of the negative plate in the CCD visual positioning (the negative visual positioning mechanism 71), and the lamination manipulator 61 picks up the negative composite sheet a to the accurate position of the bottom cover c borne by the lamination table 6;

fifthly, the lamination table 6 adjusts the position of the positive plate in the positive composite sheet b according to the result shot by the CCD visual positioning (positive visual positioning mechanism 7), and the lamination manipulator 61 picks up the positive composite sheet b to the accurate position of the negative composite sheet a borne by the lamination table 6, so that the positive plate in the positive composite sheet b is aligned with the negative plate in the negative composite sheet a;

seventhly, the lamination table 6 adjusts the position of the top cover d according to the result shot by the CCD visual positioning (end cover visual positioning mechanism 51), and the lamination manipulator 61 picks up the top cover d to the accurate position of the last negative composite sheet a borne by the lamination table 6 to form a preliminarily formed battery cell;

step eight, carrying out hot-pressing setting on the preliminarily formed battery cell through a hot-pressing machine 8 to form a compact battery cell;

placing the thermally-pressed and shaped battery cell on a trimming platform 91 through a third material moving mechanical arm, shooting the thermally-pressed and shaped battery cell in a CCD (charge coupled device) visual positioning mode (a trimming visual positioning mechanism 94), carrying out position adjustment on a shooting result of the thermally-pressed and shaped battery cell by the trimming platform 91 according to the CCD visual positioning (the trimming visual positioning mechanism 94), simultaneously cutting redundant diaphragm waste materials around the battery cell by a laser cutting machine 93 to form a composite laminated battery cell, and sucking the cut diaphragm waste materials by a material sucking device 95;

step ten, performing circuit test on the composite laminated battery cell through the circuit test device 82 to remove the composite laminated battery cell unqualified in circuit test; when the circuit testing device 82 detects that the battery cell is a defective product, the first material moving manipulator 81 transfers the defective battery cell to the first defective product storage 83, and the defective battery cell is recovered through the first defective product storage 83; when the circuit testing device 82 detects that the battery cell is good, the second material moving manipulator 85 transfers the good battery cell to the weighing device 84;

step eleven, weighing and measuring the composite laminated battery cell qualified in the circuit test through a weighing device 84 so as to eliminate the composite laminated battery cell with the wrong laminated quantity; when the weight of the battery cell is equal to the set weight value, the number of the laminations of the battery cell is correct, the battery cell is qualified, and the qualified battery cell is transferred to the code printing device 87 by the second material transferring mechanical arm 85; when the weight of the battery cell is larger than or smaller than the set weight value, it is proved that the lamination number of the battery cell is wrong, the battery cell is unqualified, the second material moving manipulator 85 transfers the unqualified battery cell to the second secondary product storage 86, and the unqualified battery cell is recovered through the second unqualified product storage 86;

step twelve, code printing is carried out on the qualified composite laminated battery cell through the weighing measurement of the code printing device 87, the code printing device 87 prints codes (such as bar codes or two-dimensional codes) on the qualified battery cell, finally the second material moving mechanical arm 85 transfers the coded battery cell into the packaging machine 88, and the packaging machine 88 packages and packs the battery to form the final battery cell.

Preferably, before the composite laminated cell is coded, the U-shaped glue is pasted around the composite laminated cell by the gluing device 80 to improve the quality of the composite laminated cell.

Example two.

As shown in fig. 2, 4 and 5, the present embodiment is different from the first embodiment in that:

a composite lamination production line comprises a positive electrode semi-composite device 1 for compositing a positive electrode plate and a diaphragm, a negative electrode semi-composite device 2 for compositing a negative electrode plate and the diaphragm, a positive electrode conveying device 3 arranged at the discharge end of the positive electrode semi-composite device 1, a negative electrode conveying device 31 arranged at the discharge end of the negative electrode semi-composite device 2, a positive electrode transfer mechanism 4 for transferring a positive composite plate b formed by the positive electrode semi-composite device 1 to the positive electrode conveying device 3, a negative electrode transfer mechanism 41 for transferring a negative composite plate a formed by the negative electrode semi-composite device 2 to the negative electrode conveying device 31, a lamination table 6 movably arranged between the negative electrode conveying device 31 and the positive electrode conveying device 3, a positive electrode visual positioning mechanism 7 arranged on the positive electrode conveying device 3 and used for visually positioning the positive composite plate b conveyed by the positive electrode conveying device 3, and a negative composite plate a arranged on the negative electrode conveying device 31 and used for visually positioning the negative composite plate a conveyed by the negative electrode conveying device 31 The battery cell lamination device comprises a cathode visual positioning mechanism 71 with positioning function, a lamination manipulator 61 for transferring a negative composite sheet a and a positive composite sheet b to a lamination table 6 to be laminated to form a primary battery cell, a coating device for coating the primary battery cell to form the battery cell, a hot pressing machine 8 for hot pressing the battery cell and a trimming device 9 for trimming the hot pressed battery cell, wherein the cathode visual positioning mechanism 7 and the cathode visual positioning mechanism 71 are electrically connected with the lamination table 6; specifically, the coating device is a coating machine 96, the coating machine 96 is located between the lamination table 6 and the hot press 8, preferably, the coating machine 96 coats the primary battery cell with a diaphragm, and the coating machine 96 may adopt a coating machine in the prior art, which is not described herein again.

In practical operation, the positive electrode semi-compound device 1 presses the positive electrode sheet on the diaphragm and forms a compact positive compound sheet b, the negative electrode semi-compound device 2 presses the negative electrode sheet on the diaphragm and forms a compact negative compound sheet a, the positive electrode transfer mechanism 4 transfers the positive compound sheet b to the positive electrode conveying device 3, the negative electrode transfer mechanism 41 transfers the negative compound sheet a to the negative electrode conveying device 31, the positive electrode visual positioning mechanism 7 visually positions the position of the positive electrode sheet on the positive compound sheet b conveyed by the positive electrode conveying device 3, the negative electrode visual positioning mechanism 71 visually positions the position of the negative electrode sheet on the negative compound sheet a conveyed by the negative electrode conveying device 31, the negative electrode visual positioning mechanism 71 and the positive electrode visual positioning mechanism 7 feed the visually positioned results back to the lamination table 6 according to the sequence, the lamination manipulator 61 picks up the negative electrode sheet a conveyed by the negative electrode conveying device 31 to the accurate position of the lamination table 6, the lamination manipulator 61 picks up the positive composite sheet b conveyed by the positive electrode conveying device 3 to the positive composite sheet b on the lamination table 6, the lamination manipulator 61 alternately overlaps N +1 negative composite sheets a and N positive composite sheets b according to a cyclic alternate overlapping mode of the negative composite sheets a and the positive composite sheets b, the negative composite sheets a are positioned on the topmost surface to form a primary cell, the primary cell is coated by a coating machine 96 to form a cell, the cell on the lamination table 6 is transferred to a hot press machine 8 by the lamination manipulator 61, the cell is pressed and molded by the hot press machine 8 to form a compact cell, the lamination manipulator 61 transfers the pressed and molded cell to a trimming device 9, the trimming device 9 trims the pressed and molded cell, and the trimming trims redundant diaphragm edges in the pressed and molded cell to form the composite lamination cell.

Specifically, the lamination table 6 comprises a positioning table 62 and a rotating device 63 for driving the positioning table 62 to rotate and move, and the positive visual positioning mechanism 7 and the negative visual positioning mechanism 71 are electrically connected with the rotating device 63.

A composite lamination method that can be used in the composite lamination production line of the second embodiment, comprising the steps of:

secondly, visually positioning the position of the negative plate in the negative composite sheet a on the diaphragm and the position of the positive plate in the positive composite sheet b on the diaphragm respectively by adopting a negative visual positioning mechanism 71 and a positive visual positioning mechanism 7 in a CCD visual positioning mode;

thirdly, the lamination table 6 adjusts the position of the negative plate in the negative composite sheet a according to the result of the negative plate position shooting by CCD visual positioning (the negative visual positioning mechanism 71), and the lamination manipulator 61 picks up the negative composite sheet a to the accurate position of the lamination table 6;

fourthly, the lamination table 6 carries out position adjustment on the shot result of the position of the positive plate in the positive composite sheet b according to CCD visual positioning (a positive visual positioning mechanism 7), and the lamination manipulator 61 picks up the positive composite sheet b to the accurate position of the negative composite sheet a borne by the lamination table 6 so as to enable the positive plate in the positive composite sheet b to be aligned with the negative plate in the negative composite sheet a;

placing the primary battery cell in a coating machine 96 by using the lamination manipulator 61, wherein the coating machine 96 is used for coating the primary battery cell by using a diaphragm to form a preliminarily molded battery cell;

seventhly, carrying out hot-pressing setting on the preliminarily formed battery cell through a hot-pressing machine 8 to form a compact battery cell;

placing the thermally pressed and shaped battery cell on a trimming platform 91 through a third material moving mechanical arm, shooting the thermally pressed and shaped battery cell in a CCD (charge coupled device) visual positioning mode (a trimming visual positioning mechanism 94), carrying out position adjustment on a shooting result of the thermally pressed and shaped battery cell by the trimming platform 91 according to the CCD visual positioning (the trimming visual positioning mechanism 94), simultaneously cutting redundant diaphragm waste materials around the battery cell by a laser cutting machine 93 to form a composite laminated battery cell, and sucking the cut diaphragm waste materials by a material sucking device 95;

step nine, performing circuit test on the composite laminated battery cell through the circuit test device 82 to remove the composite laminated battery cell which is unqualified in circuit test; when the circuit testing device 82 detects that the battery cell is a defective product, the first material moving manipulator 81 transfers the defective battery cell to the first defective product storage 83, and the defective battery cell is recovered through the first defective product storage 83; when the circuit testing device 82 detects that the battery cell is good, the second material moving manipulator 85 transfers the good battery cell to the weighing device 84;

step ten, weighing and measuring the composite laminated battery cell qualified in the circuit test through a weighing device 84 so as to eliminate the composite laminated battery cell with wrong laminated quantity; when the weight of the battery cell is equal to the set weight value, the number of the laminations of the battery cell is correct, the battery cell is qualified, and the qualified battery cell is transferred to the code printing device 87 by the second material transferring mechanical arm 85; when the weight of the battery cell is larger than or smaller than the set weight value, it is proved that the lamination number of the battery cell is wrong, the battery cell is unqualified, the second material moving manipulator 85 transfers the unqualified battery cell to the second secondary product storage 86, and the unqualified battery cell is recovered through the second unqualified product storage 86;

eleventh, the qualified composite laminated battery cell is subjected to code printing through the weighing measurement of the code printing device 87, the code printing device 87 prints codes (such as bar codes or two-dimensional codes) on the qualified battery cell, finally, the second material moving mechanical arm 85 transfers the coded battery cell into the packaging machine 88, and the packaging machine 88 packages and packs the battery to form the final battery cell.

All the technical features in the embodiment can be freely combined according to actual needs.

The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.

Claims

1. A composite lamination production line is characterized in that: comprises a positive electrode semi-composite device for compounding a positive plate and a diaphragm, a negative electrode semi-composite device for compounding a negative plate and the diaphragm, a positive electrode conveying device arranged at the discharge end of the positive electrode semi-composite device, a negative electrode conveying device arranged at the discharge end of the negative electrode semi-composite device, a positive electrode transfer mechanism for transferring a positive composite sheet b formed by the positive electrode semi-composite device to the positive electrode conveying device, a negative electrode transfer mechanism for transferring a negative composite sheet a formed by the negative electrode semi-composite device to the negative electrode conveying device, a lamination table movably arranged between the negative electrode conveying device and the positive electrode conveying device, a positive electrode visual positioning mechanism arranged on the positive electrode conveying device and used for visually positioning the positive composite sheet b conveyed by the positive electrode conveying device, a negative electrode visual positioning mechanism arranged on the negative electrode conveying device and used for visually positioning the negative composite sheet a conveyed by the negative electrode conveying device, a positioning mechanism arranged on the negative electrode conveying device, a positioning mechanism, The laminating machine is used for transferring the negative composite sheet a and the positive composite sheet b to the laminating table to be laminated so as to form a laminating mechanical arm of a primary battery cell, a cladding device used for cladding the primary battery cell so as to form the battery cell, a hot pressing machine used for carrying out hot pressing on the battery cell and a trimming device used for trimming the battery cell after the hot pressing, and the positive visual positioning mechanism and the negative visual positioning mechanism are both electrically connected with the laminating table.

2. A composite laminate production line as claimed in claim 1, wherein: the coating device comprises a cover storage device for storing a bottom cover c and a top cover d and an end cover visual positioning mechanism which is arranged on the cover storage device and is used for visually positioning the bottom cover c or/and the top cover d, the bottom cover c, the negative composite sheet a, the positive composite sheet b and the top cover d are transferred to a lamination table by a lamination manipulator according to the lamination sequence to be laminated to form a battery cell, and the end cover visual positioning mechanism is electrically connected with the lamination table.

3. A composite laminate production line as claimed in claim 1, wherein: the coating device is a coating machine, and the coating machine is positioned between the laminating table and the hot pressing machine.

4. A composite laminate production line as claimed in claim 1, wherein: the anode semi-composite device or/and the cathode semi-composite device comprises a semi-composite frame, a pre-pressing roller rotatably arranged on the semi-composite frame, a semi-composite hot-pressing mechanism arranged at the discharge end of the pre-pressing roller, a vacuum traction mechanism arranged at the discharge end of the semi-composite hot-pressing mechanism and used for drawing the diaphragm to move, a cutting mechanism arranged at the discharge end of the vacuum traction mechanism and used for cutting the diaphragm, and a semi-composite conveying device arranged at the discharge end of the cutting mechanism.

5. A composite laminate production line as claimed in claim 4, wherein: and a pre-storage mechanism is arranged between the vacuum traction mechanism and the cutting mechanism.

6. A composite laminate production line as claimed in claim 1, wherein: the trimming device comprises a trimming platform, a movable driving mechanism for driving the trimming platform to move, a laser cutting machine positioned above the trimming platform, a trimming visual positioning mechanism positioned above the trimming platform and a material suction device arranged on the trimming platform and used for sucking waste materials, wherein the trimming visual positioning mechanism is electrically connected with the movable driving mechanism.

7. A composite laminate production line as claimed in claim 1, wherein: the composite lamination production line further comprises a first material moving manipulator and a circuit testing device for performing circuit testing on the trimmed battery cell, and the first material moving manipulator is used for transferring the trimmed battery cell to the circuit testing device or outputting the battery cell tested by the circuit testing device.

8. A composite laminate production line as claimed in claim 7, wherein: the composite lamination production line further comprises a first product storage device, a weighing device, a second material moving mechanical arm, a second product storage device, a code printing device and a packaging machine, wherein the first material moving mechanical arm is used for transferring defective cells detected by the circuit testing device to the first product storage device, the second material moving mechanical arm is used for transferring non-defective cells detected by the circuit testing device to the weighing device, the first material moving mechanical arm and the second material moving mechanical arm are electrically connected with the circuit testing device, the second material moving mechanical arm transfers defective cells weighed by the weighing device to the second product storage device, transfers non-defective cells weighed by the weighing device to the code printing device or transfers cells printed by the code printing device to the packaging machine, and the second material moving mechanical arm is electrically connected with the weighing device.

9. A method of laminating a laminate, comprising: the method comprises the following steps:

10. A method of laminating a laminate, comprising: the method comprises the following steps: