A pole piece composite continuous production equipment

Abstract

The application relates to the technical field of battery pole pieces, in particular to a pole piece composite continuous production equipment. The equipment comprises a first electrode film piece supply device, a second electrode film piece supply device, a foil unwinding and output device, a first composite device and a second composite device. The first electrode film piece supply device is used for production and output of a first electrode film piece; the second electrode film piece supply device is used for production and output of a second electrode film piece; the foil unwinding and output device is used for output of a foil; the first composite device is used for receiving the first electrode film piece and the foil, and compositing the first electrode film piece to a first side of the foil to obtain a single-side composite pole piece; and the second composite device is used for receiving the single-side composite pole piece and the second electrode film piece, and compositing the second electrode film piece to a second side of the foil to obtain a double-side composite pole piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery pole piece, and particularly relates to a pole piece composite continuous production equipment. BACKGROUND

[0002] The existing electrode pole piece preparation method is mainly wet coating, that is, first, active material powder, adhesive powder, conductive agent powder and the like are stirred and dispersed to prepare slurry by using solvent in a homogenizing process, and then the slurry is quantitatively coated on a current collector such as copper or aluminum foil and dried to form a loose porous pole piece. However, the use amount of solvent in the slurry is large, the equipment is large in size, expensive in price and high in energy consumption.

[0003] Another process is dry electrode preparation, but the preparation method is to prepare the electrode film separately, and after the preparation is completed, the current collector substrate is rewound, aligned, compounded, detected and the like, which results in low production efficiency, high cost and great influence on product quality in the intermediate process.

[0004] Therefore, it is necessary to propose a technical means to solve the above defects. SUMMARY

[0005] The present application adopts the following technical scheme:

[0006] The pole piece composite continuous production equipment comprises a first electrode film piece supply device, a second electrode film piece supply device, a foil unwinding and output device, a first compounding device, a second compounding device, a winding device and a hot roller pressing device and a cold roller pressing device. The first electrode film piece supply device is used for production and output of the first electrode film piece. The second electrode film piece supply device is used for production and output of the second electrode film piece. The foil unwinding and output device is used for output of the foil. The first compounding device is used for receiving the first electrode film piece and the foil, and compounding the first electrode film piece to the first side of the foil to obtain a single-sided composite pole piece. The second compounding device is used for receiving the single-sided composite pole piece and the second electrode film piece, and compounding the second electrode film piece to the second side of the foil to obtain a double-sided composite pole piece. The winding device is used for receiving and winding the double-sided composite pole piece. The hot roller pressing device is installed between the winding device and the second compounding device, and is used for heating and compacting the double-sided composite pole piece after heating. The cold roller pressing device is installed between the winding device and the second compounding device, and is used for cooling and compacting the double-sided composite pole piece after cooling.

[0007] Preferably, the first electrode film piece supply device comprises a first electrode film piece preparation assembly for manufacturing the first electrode film piece, a first trimming assembly for trimming the first electrode film piece output by the first electrode film piece preparation assembly, and a first roller assembly for compacting the trimmed first electrode film piece.

[0008] Preferably, the second electrode film piece supply device comprises a second electrode film piece preparation assembly for manufacturing the second electrode film piece, a second trimming assembly for trimming the second electrode film piece output by the second electrode film piece preparation assembly, and a second roller assembly for compacting the trimmed second electrode film piece.

[0009] Preferably, the foil unwinding output device comprises an unwinding shaft for unwinding the foil.

[0010] Preferably, the first compounding device comprises a first coating assembly for receiving the foil output by the foil unwinding output device and coating the first side of the foil with electrolyte, and a first lamination assembly for receiving the first electrode film piece output by the first electrode film piece supply device and the coated foil and laminating the first electrode film piece to the first side of the foil.

[0011] Preferably, the second compounding device comprises a second coating assembly for receiving the single-sided compound electrode piece and coating the second side of the foil in the single-sided compound electrode piece with electrolyte, and a second lamination assembly for receiving the second electrode film piece output by the second electrode film piece supply device and the coated single-sided compound electrode piece and laminating the second electrode film piece to the second side of the foil.

[0012] Preferably, an oven for drying the double-sided compound electrode piece is arranged between the winding device and the second compounding device.

[0013] Preferably, a third laser thickness gauge is further arranged on the input end of the winding device for measuring the thickness of the double-sided compound electrode piece input into the winding device.

[0014] The battery electrode piece generation device of the present application can efficiently complete the production of film pieces and the compounding with foils, does not need subsequent offline transfer, realizes the continuous production of electrode pieces, greatly improves the production efficiency of electrode pieces, and is suitable for industrial application. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 FIG. 1 is a schematic diagram of a battery electrode piece generation device according to the present application;

[0016] Fig. 2It is a whole schematic view of first electrode film piece supply device, foil unwinding and output device and first composite device in a battery pole piece generating equipment of the application.

[0017] Fig. 3 It is a whole schematic view of second electrode film piece supply device, second composite device, oven, hot roller pressing device, cold roller pressing device, winding device and third laser thickness gauge in a battery pole piece generating equipment of the application. DETAILED DESCRIPTION

[0018] The technical solutions of the application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all the other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the application.

[0019] In the description of the application, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0021] As Figs. 1 to 3The application relates to a kind of electrode sheet composite continuous production equipment, including first electrode film piece supply device 10, first electrode film piece supply device 10 is used for the production and output of first electrode film piece;Second electrode film piece supply device 20, second electrode film piece supply device 20 is used for the production and output of second electrode film piece;Foil unwinding output device 30, foil unwinding output device 30 is used for output foil;First composite device 40, first composite device 40 is used to receive first electrode film piece and foil, and first electrode film piece is compounded to the first side of foil, to obtain single-sided composite electrode sheet;Second composite device 50, second composite device 50 is used to receive single-sided composite electrode sheet and second electrode film piece, and second electrode film piece is compounded to the second side of foil, to obtain double-sided composite electrode sheet;Winding device 60, winding device 60 is used to receive and wind double-sided composite electrode sheet;Winding device 60 and second composite device 50 are provided with heat roller pressing device 80 for heating double-sided composite electrode sheet, and compaction after heating;Winding device 60 and second composite device 50 are provided with cold roller pressing device 90 for cooling double-sided composite electrode sheet, and compaction after cooling;Specifically, heat roller pressing device 80 includes heating roller 801 for heating double-sided composite electrode sheet, and fifth compression roller 802 and sixth compression roller 803 for compaction of double-sided composite electrode sheet after heating of heating roller 801, and they are pressed against each other.Cold roller pressing device 90 includes cooling roller 901 for cooling double-sided composite electrode sheet, and seventh compression roller 902 and eighth compression roller 903 for compaction of double-sided composite electrode sheet after cooling of cooling roller 901.In the embodiment, after heat roller pressing and cold roller pressing of double-sided composite electrode sheet, the tightness and adhesion between first electrode film piece, second electrode film piece and foil are further improved.

[0022] The application relates to a kind of battery electrode sheet generation equipment, can efficiently complete the production of film piece and the composite between foil, does not need subsequent offline sequence, realizes the continuous production of electrode sheet, greatly improves the production efficiency of electrode sheet, is suitable for industrial application.

[0023] In a specific embodiment, winding device 60 includes winding shaft 601 for winding double-sided composite electrode sheet.

[0024] In a specific embodiment, first electrode film piece supply device 10 includes first electrode film piece preparation assembly 101 for manufacturing first electrode film piece, first trimming assembly 102 for trimming first electrode film piece output by first electrode film piece preparation assembly 101, and first roller pressing assembly 103 for compaction of trimmed first electrode film piece.

[0025] Specifically, the first electrode film preparation assembly 101 comprises a first forming roller 104 and a second forming roller 105 arranged horizontally and pressed against each other, a first driving unit (not shown in the figure) connected with the first forming roller 104 and the second forming roller 105 for driving the first forming roller 104 and the second forming roller 105 to rotate towards each other, a first supporting roller 106 and a second supporting roller 107 respectively installed on the side of the first forming roller 104 and the second forming roller 105 away from each other and pressed against the first forming roller 104 and the second forming roller 105 and capable of rotating around themselves, and a first feeding hopper 108 installed on the first forming roller 104 and the second forming roller 105 for feeding materials for electrode film forming between the first forming roller 104 and the second forming roller 105. Further, during operation, the materials are fed between the first forming roller 104 and the second forming roller 105 through the first feeding hopper 108, and at this time, the first forming roller 104 and the second forming roller 105 are driven by the first driving unit to rotate towards each other, so that the materials are rolled into the first electrode film under high temperature and high pressure, and then output downwards to the first trimming assembly 102 for trimming. The first supporting roller 106 and the second supporting roller 107 are arranged to prevent the first forming roller 104 and the second forming roller 105 from deforming during operation, thereby improving the quality of the first electrode film.

[0026] Specifically, the first trimming assembly 102 comprises a first cutter roller 109 installed on the first electrode film conveying path for trimming the edges of the first electrode film.

[0027] Specifically, the first roller pressing assembly 103 comprises a first pressing roller 110 and a second pressing roller 111 for compacting the first electrode film.

[0028] Specifically, the first electrode film supply device 10 further comprises a first laser thickness gauge 112 installed on the side of the output end of the first roller pressing assembly 103 for measuring the thickness of the first electrode film after being rolled.

[0029] In one specific embodiment, the second electrode film supply device 20 comprises a second electrode film preparation assembly 201 for manufacturing the second electrode film, a second trimming assembly 202 for trimming the second electrode film output by the second electrode film preparation assembly 201, and a second roller pressing assembly 203 for compacting the second electrode film after trimming.

[0030] Specifically, the second electrode film sheet preparation assembly 201 comprises a third forming roller 204 and a fourth forming roller 205 arranged horizontally and pressed against each other, a second driving unit (not shown in the figure) connected with the third forming roller 204 and the fourth forming roller 205 and used for driving the third forming roller 204 and the fourth forming roller 205 to rotate towards each other, a third supporting roller 206 and a fourth supporting roller 207 respectively installed on the side of the third forming roller 204 and the fourth forming roller 205 away from each other and pressed against the third forming roller 204 and the fourth forming roller 205 and capable of rotating around themselves, and a second feeding hopper 208 installed on the third forming roller 204 and the fourth forming roller 205 and used for feeding materials for electrode film forming between the third forming roller 204 and the fourth forming roller 205. Further, in operation, the materials are fed between the third forming roller 204 and the fourth forming roller 205 through the second feeding hopper 208, and at this time, the third forming roller 204 and the fourth forming roller 205 are driven by the second driving unit to rotate towards the inner side, so that the materials are rolled into second electrode film sheets under high temperature and high pressure, and then output downwards to the second trimming assembly 202 for trimming. The third supporting roller 206 and the fourth supporting roller 207 are arranged to prevent the third forming roller 204 and the fourth forming roller 205 from deforming in operation, thereby improving the quality of the second electrode film sheets.

[0031] Specifically, the second trimming assembly 202 comprises a second cutter roller 209 installed on the second electrode film sheet conveying path and used for trimming the edges of the second electrode film sheets.

[0032] Specifically, the second roller pressing assembly 203 comprises a third pressing roller 210 and a fourth pressing roller 211 used for compacting the second electrode film sheets.

[0033] Specifically, the second electrode film sheet supply device 20 further comprises a second laser thickness gauge 212 installed on the side of the output end of the second roller pressing assembly 203 and used for measuring the thickness of the second electrode film sheets after being pressed.

[0034] In one specific embodiment, the foil unwinding and output device 30 comprises an unwinding shaft 301 used for unwinding the foil.

[0035] In a specific embodiment, the first composite device 40 comprises a first coating assembly 401 for receiving the foil outputted from the foil unwinding output device and coating the first side of the foil with electrolyte, and a first laminating assembly 402 for receiving the first electrode film outputted from the first electrode film supply device 10 and the coated foil and laminating the first electrode film to the first side of the foil. Specifically, the first coating assembly 401 comprises a first coating head 403 for coating the first side of the foil with electrolyte. The first laminating assembly 402 comprises a first pressing roller 404 and a second pressing roller 405 abutting against the first pressing roller 404; in operation, the coated foil and the first electrode film are conveyed between the first pressing roller 404 and the second pressing roller 405 and laminated together by the first pressing roller 404 and the second pressing roller 405. Specifically, the first composite device 40 further comprises a first guide roller assembly 406 for guiding the coated foil between the first pressing roller 404 and the second pressing roller 405, and a second guide roller assembly 407 for guiding the first electrode film outputted from the first electrode film supply device 10 between the first pressing roller 404 and the second pressing roller 405.

[0036] In a specific embodiment, the second composite device 50 comprises a second coating assembly 501 for receiving the single-sided composite electrode and coating the second side of the foil in the single-sided composite electrode with electrolyte, and a second laminating assembly 502 for receiving the second electrode film outputted from the second electrode film supply device 20 and the coated single-sided composite electrode and laminating the second electrode film to the second side of the foil. Specifically, the second coating assembly 501 comprises a second coating head 503 for coating the second side of the foil with electrolyte. The second laminating assembly 502 comprises a third pressing roller 504 and a fourth pressing roller 505 abutting against the third pressing roller 504; in operation, the coated single-sided composite electrode and the second electrode film are conveyed between the third pressing roller 504 and the fourth pressing roller 505 and laminated together by the third pressing roller 504 and the fourth pressing roller 505. Specifically, the second composite device 50 further comprises a third guide roller assembly 506 for guiding the coated single-sided composite electrode between the third pressing roller 504 and the fourth pressing roller 505, and a fourth guide roller assembly 507 for guiding the second electrode film outputted from the second electrode film supply device 20 between the third pressing roller 504 and the fourth pressing roller 505.

[0037] In a specific embodiment, an oven 70 for drying the double-sided composite electrode is arranged between the winding device 60 and the second composite device 50. In this embodiment, the arrangement of the oven 70 further improves the tightness and adhesion between the first electrode film, the second electrode film and the foil.

[0038] In one specific embodiment, a third laser thickness gauge 100 is also included mounted to the input end of the winding device 60 for measuring the thickness of the double-sided composite electrode piece being wound into the winding device 60.

[0039] The battery electrode piece generating device can efficiently complete the production of the film piece and the compounding with the foil, does not need subsequent offline conversion, realizes the continuous production of the electrode piece, greatly improves the production efficiency of the electrode piece, and is suitable for industrial application.

[0040] The above embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A continuous production equipment for electrode composites, characterized by: include A first electrode membrane supply device, wherein the first electrode membrane supply device is used for producing and outputting the first electrode membrane; A second electrode membrane supply device, the second electrode membrane supply device is used for producing and outputting the second electrode membrane; A foil unwinding and outputting device, wherein the foil unwinding and outputting device is used to output the foil; a first composite device, the first composite device being used to receive the first electrode membrane and the foil material, and composite the first electrode membrane to the first side surface of the foil material to obtain a single-sided composite electrode sheet; a second composite device, the second composite device being used to receive the single-sided composite electrode sheet and the second electrode membrane, and composite the second electrode membrane to the second side surface of the foil to obtain a double-sided composite electrode sheet; A winding device, the winding device is used to receive and wind up the double-sided composite electrode; A hot rolling device, installed between the winding device and the second composite device, for heating the double-sided composite electrode and compacting it after heating; A cold rolling device, installed between the winding device and the second composite device, for cooling the double-sided composite electrode and compacting it after cooling; The first composite device includes a first coating assembly for receiving the foil output from the foil unwinding and outputting device and applying electrolyte to the first side of the foil; a first laminating assembly for receiving the first electrode membrane output from the first electrode membrane supply device and the coated foil and laminating the first electrode membrane to the first side of the foil; the first coating assembly includes a first coating head for applying electrolyte to the first side of the foil; the first laminating assembly includes a first pressing roller and a second pressing roller abutting the first pressing roller; The second composite device includes a second coating assembly for receiving the single-sided composite electrode and applying electrolyte to the second side of the foil in the single-sided composite electrode, and a second bonding assembly for receiving the second electrode membrane output from the second electrode membrane supply device and the coated single-sided composite electrode, and bonding the second electrode membrane to the second side of the foil; the second coating assembly includes a second coating head for applying electrolyte to the second side of the foil; the second bonding assembly includes a third pressing roller and a fourth pressing roller abutting the third pressing roller.

2. The electrode composite continuous production equipment according to claim 1, characterized in that: The first electrode membrane supply device includes a first electrode membrane preparation assembly for manufacturing the first electrode membrane, a first trimming assembly for trimming the first electrode membrane output by the first electrode membrane preparation assembly, and a first rolling assembly for compacting the trimmed first electrode membrane.

3. The electrode composite continuous production equipment according to claim 1, characterized in that: The second electrode membrane supply device includes a second electrode membrane preparation assembly for manufacturing the second electrode membrane, a second trimming assembly for trimming the second electrode membrane output by the second electrode membrane preparation assembly, and a second rolling assembly for compacting the trimmed second electrode membrane.

4. The electrode composite continuous production equipment according to claim 1, characterized in that: The foil material unwinding and outputting device comprises an unwinding shaft for unwinding the foil material.

5. The electrode composite continuous production equipment according to claim 1, characterized in that: An oven for drying the double-sided composite electrode sheet is provided between the winding device and the second composite device.

6. The electrode composite continuous production equipment according to claim 1, characterized in that: It also includes a third laser thickness gauge installed at the input end of the winding device, which is used to measure the thickness of the double-sided composite electrode input into the winding device for winding.

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