WO2023221034A1

WO2023221034A1 - Multi-station hot-lamination high-speed stacking machine for stacked cell and stacking method

Info

Publication number: WO2023221034A1
Application number: PCT/CN2022/093821
Authority: WO
Inventors: 温在东
Original assignee: 温在东
Priority date: 2022-05-15
Filing date: 2022-05-19
Publication date: 2023-11-23
Also published as: CN115101817A

Abstract

The present invention relates to the technical field of stacked cell production devices. Disclosed in the present invention are a multi-station hot-lamination high-speed stacking machine for a stacked cell and a stacking method. The multi-station hot-lamination high-speed stacking machine comprises a stack conveying mechanism, one side of the starting position thereof being provided with a primary-separator unwinding and correcting station; a plurality of stack CCD alignment mechanisms are arranged at two sides; a secondary-separator unwinding and correcting station is correspondingly arranged above each stacking station; and a hot roll lamination positioning mechanism is arranged between each two secondary-separator unwinding and correcting stations. In the hot-lamination high-speed stacking machine for a stacked cell and the stacking method in the present invention, electrode sheets and separators on the secondary-separator unwinding and correcting stations are placed alternately on a separator on the stack conveying mechanism; and after a predetermined number of layers of the electrode sheets are stacked, the separator is cut off, so that batch production of stacked cells is achieved, and a plurality of small cells can be formed during the production process. Meanwhile, the hot roll lamination positioning mechanism enables the relative positions of the electrode sheets and the secondary separators to be fixed, thus effectively preventing situations of dislocation, deviation and the like of the electrode sheets, and improving the production efficiency.

Description

Multi-station laminated battery core thermal lamination high-speed lamination machine and lamination method

Technical field

The invention relates to the technical field of laminated battery core production equipment, and in particular to a multi-station laminated battery core thermal lamination high-speed lamination machine and a lamination method.

Background technique

In the production process of lithium batteries, hydrogen batteries and solar cells, a laminating machine is required to stack the pole pieces and separators before subsequent processes. With the vigorous development of new energy, the size of battery cells is also increasing. Enterprises have an increasing demand for power batteries, and the demand is far greater than production capacity. Driven by national policies, companies entering the new energy industry are flourishing. As automobile production rises, the demand for supporting power battery cell packs has also doubled exponentially. The efficiency of previous cell production equipment has been unable to meet the needs of the existing market. need.

In particular, power batteries, blade batteries, energy storage batteries and three-C batteries whose battery cores are formed using lamination technology and thermal lamination technology have limited production capacity due to current production processes and production line equipment, resulting in an inability to achieve breakthroughs in output.

During the lamination process, existing lamination equipment usually completes the processing by continuously bending the separator and stacking the pole pieces. Each round of lamination process can only complete the processing of one small cell cell, and during the stacking process, The diaphragm needs to be bent continuously. The process of reciprocating bending of the diaphragm takes a lot of time and the production efficiency is low. Moreover, as the volume of battery cell modules produced becomes larger and larger, the center of gravity moves upward as the pole pieces are stacked during the lamination process. When the battery pack moves to the next station, it is easy to cause the pole pieces to shake and position deviated. Shifting, the production line speed must be controlled within a certain range, and production efficiency cannot be effectively improved.

Contents of the invention

The present invention aims to at least solve the problem existing in the prior art that "each round of stacking process can only complete the processing of one small cell unit, and during the stacking process, the separator needs to be continuously bent, and the process of reciprocating bending of the separator is time-consuming. It takes a lot of time and the production efficiency is low. Moreover, during the lamination process, when the battery pack is moved to the next station, it is easy to cause the pole pieces to shake and shift position. The production line speed must be controlled within a certain range, which cannot effectively improve production efficiency." technical problem. To this end, the present invention proposes a multi-station laminated battery core thermal lamination high-speed lamination machine and a lamination method, which can produce multiple small battery cells at the same time without bending the separator, saving time and laminating. During the process, the position of each pole piece is fixed to avoid offset, improve the production efficiency of laminated cells, and meet supply demand.

A multi-station laminated battery core thermal lamination high-speed lamination machine according to some embodiments of the present invention includes:

A lamination conveying mechanism, the lamination conveying mechanism is provided with a plurality of lamination stations, and the lamination stations are arranged along the extension direction of the lamination conveyance mechanism;

A first-level diaphragm unwinding and correction station is provided on one side of the starting position of the lamination conveying mechanism. The lamination conveying mechanism drives the diaphragms of the first-level diaphragm unwinding and correcting station to pass through the lamination station in sequence. ;

A plurality of laminated CCD alignment mechanisms are provided on both sides of the laminated sheet conveying mechanism. The laminated CCD aligning mechanism is divided into two types: a positive stacked CCD aligning mechanism and a negative stacked CCD aligning mechanism;

Each lamination station is provided with one lamination CCD positioning mechanism, wherein the lamination stations arranged at intervals are provided with the same type of lamination CCD positioning mechanism, and all adjacently arranged lamination CCD positioning mechanisms are provided The lamination station is provided with different types of lamination CCD alignment mechanisms;

A hot rolling lamination positioning mechanism is provided correspondingly between each lamination station. The hot rolling lamination positioning mechanism is used to heat the diaphragm and the pole piece to fix the positions of the pole piece and the diaphragm;

A secondary diaphragm unwinding and correcting station is provided above each stacking station, and the secondary diaphragm unwinding and correcting station is arranged between the two stacked CCD alignment mechanisms.

According to some embodiments of the present invention, the hot roller lamination positioning mechanism includes an upper heating roller, which is rotatably connected above the two secondary separator unwinding and correction stations. The roller surface is in contact with the surface of the diaphragm being unrolled at the secondary diaphragm unwinding and deflection correction station, and is used to promote the colloid between the diaphragm and the pole piece to melt and fix the diaphragm and the pole piece.

According to some embodiments of the present invention, a single cell cutting mechanism is provided at the end of the lamination conveying mechanism, and the single cell cutting mechanism is used to cut off the separator between adjacent pole pieces; the single cell One side of the cutting mechanism is provided with a secondary stacking mechanism or a finished battery core forming mechanism. The finished battery core forming mechanism is used to glue or hot-press the finished battery core.

According to some embodiments of the present invention, one side of each of the stacked CCD alignment mechanisms is respectively provided with a chip taking station, and the chip taking station, the stacked CCD alignment mechanism and the stacking station The pole pieces are moved between positions through a pole piece transfer mechanism.

According to some embodiments of the present invention, a two-pole sheet incoming conveyor belt is included, and the sheet taking station is divided into two types: a positive electrode sheet taking station and a negative electrode sheet taking station; the pole sheet incoming conveyor belt passes through each in turn. The positive electrode pick-up station is used to allow the pole piece transfer mechanism to move the positive electrode stack into the positive electrode stack CCD alignment mechanism; the other pole piece incoming conveyor belt passes through each of the negative electrodes in sequence. The chip taking station is used to allow the pole piece transfer mechanism to move the negative electrode stack into the negative electrode stack CCD alignment mechanism.

According to some embodiments of the present invention, a plurality of pole piece discharging mechanisms are included. The pole piece discharging mechanism is divided into two types: a positive pole piece discharging mechanism and a negative pole piece discharging mechanism. The piece taking station is divided into There are two types of positive electrode chip taking station and negative electrode chip taking station; the positive electrode piece discharging mechanism is set corresponding to the positive electrode piece taking station, and is used to allow the pole piece transfer mechanism to move the positive electrode stack to the positive electrode In the stacked CCD alignment mechanism; the negative electrode piece discharging mechanism is set corresponding to the negative electrode piece taking station, and is used to allow the pole piece transfer mechanism to move the negative electrode stack to the negative electrode stack CCD alignment mechanism middle.

The lamination method according to some embodiments of the present invention includes a lamination conveying mechanism, a plurality of lamination stations, a primary separator unwinding and correcting station, a plurality of secondary separator unwinding and correcting stations, and a plurality of hot rollers. Lamination positioning mechanism, multiple positive electrode stack CCD alignment mechanisms, multiple negative electrode stack CCD alignment mechanisms, multiple chip removal stations, single cell cutting mechanism and multiple pole piece transfer mechanisms; including the following steps :

In S100, the first-level diaphragm at the first-level diaphragm unwinding and correction station is unrolled onto the lamination conveying mechanism, and the lamination conveying mechanism drives the diaphragm to the lamination station;

S200: The pole piece transfer mechanism transfers the pole pieces from the piece taking station to the positive electrode stack CCD alignment mechanism or the negative electrode stack CCD alignment mechanism for alignment, and the pole pieces complete the alignment. Finally, the pole piece transfer mechanism moves the pole piece to the lamination station;

S300: The lamination conveying mechanism drives the first-level diaphragm to the next lamination station;

In S400, the secondary diaphragm at the secondary diaphragm unwinding and correction station is unrolled above the pole piece and covers the pole piece;

The upper heating roller of the hot roller laminating and positioning mechanism in S500 is close to the surface of the secondary diaphragm, heating the colloid of the secondary diaphragm, so that the secondary diaphragm and the pole piece are hot pressed and laminated;

S600: The pole piece transfer mechanism transfers pole pieces from different types of stacked CCD alignment mechanisms to the stacking station, and the pole piece transfer mechanism transfers pole pieces to the secondary on the diaphragm, and adjust the position of the pole piece to align with the pole piece under the secondary diaphragm;

S700 cycles S300-S600 to the specified number of times;

S800: The laminated transport mechanism transports the primary diaphragm to the single cell cutting mechanism, and the single cell cutting mechanism cuts off the diaphragm on one side of the finished cell;

The finished battery cores described in S900 are moved to the next station for secondary stacking, gluing or hot pressing.

According to some embodiments of the present invention, the pole piece transfer mechanism transfers an equal number of pole pieces each time, and transfers at least one pole piece each time.

According to some embodiments of the present invention, it includes a conveyor belt for incoming bipolar sheets, a plurality of positive electrode sheet taking stations and a plurality of negative electrode sheet taking stations, and the positive electrode sheet taking station is in conjunction with the positive electrode stack CCD alignment mechanism. There is a one-to-one correspondence between the negative electrode chip taking station and the negative electrode stack CCD alignment mechanism; the pole piece incoming conveyor belt transports the pole piece through each of the positive electrode chip taking stations in sequence, and the pole piece The chip transfer mechanism transfers the pole pieces of the positive electrode chip taking station to the positive electrode stack CCD alignment mechanism for alignment; the other pole piece incoming conveyor belt transports the pole pieces through each of the negative electrodes in sequence In the chip taking station, the pole piece transfer mechanism transfers the pole piece of the negative electrode chip taking station to the negative electrode stack CCD alignment mechanism for alignment.

According to some embodiments of the present invention, a plurality of positive electrode piece discharging mechanisms and a plurality of negative electrode piece discharging mechanisms are included, and the positive electrode piece discharging mechanism corresponds to the positive electrode stack CCD alignment mechanism one by one, so The negative electrode piece discharging mechanism corresponds to the negative electrode stack CCD positioning mechanism one-to-one; the pole pieces of the positive electrode piece discharging mechanism are transported to the positive electrode piece taking station, and the pole piece transfer mechanism The pole pieces of the positive electrode piece taking station are transferred to the positive electrode stack CCD alignment mechanism for alignment; the pole pieces of the negative electrode piece discharging mechanism are transported to the negative electrode piece taking station, so The pole piece transfer mechanism transfers the pole piece of the negative electrode piece taking station to the negative electrode stack CCD alignment mechanism for alignment.

According to some embodiments of the present invention, the multi-station high-speed lamination machine and lamination method for thermal lamination of laminated battery cells have at least the following beneficial effects: the lamination conveying mechanism drives the first-level diaphragm unwinding and correction station The diaphragm moves. During the movement of the diaphragm, the pole pieces and the diaphragms of the secondary diaphragm unwinding and correcting station are staggeredly placed on the diaphragm of the lamination conveying mechanism. The pole pieces are stacked for a specified number of layers and then the diaphragms are cut to realize lamination. Mass production of battery cells. During the production process, multiple small cells can be formed, and the separator does not need to be bent back and forth, saving time and improving the production efficiency of laminated cells. After the secondary diaphragm is covered on the surface of the pole piece, the hot roller lamination positioning mechanism heats the colloid in the secondary diaphragm to increase its viscosity by heating and rolling, so that the relative position of the pole piece and the secondary diaphragm is fixed. In the process of producing battery cells with a large number of stacked layers, it can effectively prevent pole piece dislocation and offset, which is beneficial to increasing the production line operating speed while maintaining the stability of the stacked sheets and improving production efficiency.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of the drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

Figure 1 is a first principle side view of an embodiment of the present invention;

Figure 2 is a schematic top view of Example 1 of the embodiment of the present invention;

Figure 3 is a principle flow chart of Example 1 of the embodiment of the present invention;

Figure 4 is a schematic top view of Example 2 of the embodiment of the present invention;

Figure 5 is a principle flow chart of Example 2 of the embodiment of the present invention;

Figure 6 is a schematic flow chart of a high-speed laminating machine for thermal lamination of multi-station laminated battery cells according to an embodiment of the present invention;

Figure 7 is a second principle side view of the embodiment of the present invention.

Reference signs:

Lamination conveying mechanism 100, lamination station 110, hot roller lamination positioning mechanism 120, upper heating roller 121, primary separator unwinding and correcting station 210, secondary separator unwinding and correcting station 220, positive electrode lamination CCD Alignment mechanism 310, negative stack CCD alignment mechanism 320, pole piece incoming conveyor belt 400, positive electrode piece taking station 411, negative electrode piece taking station 412, positive electrode piece discharging mechanism 510, negative electrode piece discharging mechanism 520. Single cell cutting mechanism 530.

Detailed ways

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and cannot be understood as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationships related to the orientation description, such as up, down, front, back, left, right, top, bottom, etc., are based on the orientation or position shown in the drawings. The relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

In the description of the present invention, several means one or more, plural means two or more, greater than, less than, more than, etc. are understood to exclude the original number, and above, below, within, etc. are understood to include the original number. If there is a description of first and second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features. relation.

In the description of the present invention, unless otherwise explicitly limited, words such as setting, installation, and connection should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

The following describes a multi-station laminated battery core thermal lamination high-speed lamination machine and lamination method according to embodiments of the present invention with reference to FIGS. 1 to 7 .

As shown in Figures 1 to 7, the multi-station laminated battery core thermal lamination high-speed lamination machine includes a lamination conveying mechanism 100, multiple lamination stations 110, a first-level diaphragm unwinding and correction station 210, multiple Laminated CCD positioning mechanism, multiple thermal roller lamination positioning mechanisms 120 and multiple secondary diaphragm unwinding and correction stations 220.

The laminating stations 110 are all arranged on the laminating conveying mechanism 100. The laminating stations 110 are arranged along the extension direction of the laminating conveying mechanism 100. A first-level diaphragm unwinding and correction is provided on one side of the starting position of the laminating conveying mechanism 100. Station 210, the first-level diaphragm unwinding and correction station 210 unwinds the diaphragm onto the conveyor belt of the lamination conveying mechanism 100, and moves together with the conveyor belt of the lamination conveying mechanism 100, allowing the first-level diaphragm unwinding and correcting work The diaphragm of station 210 passes through each lamination station 110 in sequence.

A plurality of laminated CCD positioning mechanisms are respectively provided on both sides of the laminated sheet conveying mechanism 100. The laminated CCD positioning mechanism is divided into two types: a positive electrode laminated CCD positioning mechanism 310 and a negative electrode laminated CCD positioning mechanism 320. The positive electrode laminated CCD positioning mechanism 320. The sheet CCD positioning mechanism 310 is used to perform the positioning process of the positive electrode piece, and the negative electrode stack CCD positioning mechanism 320 is used to perform the positioning process of the negative electrode piece. A corresponding one is provided on one side of each stacking station 110. A laminated CCD positioning mechanism, in which the laminated CCD positioning mechanisms of the same type are provided for the laminated stacking stations 110 arranged at intervals, and the laminated CCD positioning mechanisms of different types are correspondingly arranged for the adjacent stacking stations 110 . A secondary diaphragm unwinding and correcting station 220 is provided above each stacking station 110. The secondary diaphragm unwinding and correcting station 220 is arranged between the two stacked CCD alignment mechanisms. A hot rolling laminating and positioning mechanism 120 is provided between the roll correction stations 220. The hot rolling laminating and positioning mechanism 120 is in a preheated state and can roll and heat the colloid of the diaphragm. The hot rolling laminating and positioning mechanism 120 can heat and roll the secondary diaphragm after the secondary diaphragm of the secondary diaphragm unwinding and correction station 200 covers the top of the pole piece, so as to increase the colloid viscosity between the secondary diaphragm and the pole piece. , fixing the position of the secondary diaphragm and pole piece. After each lamination, the position of the pole pieces is fixed by the hot roller lamination positioning mechanism 120, which reduces the shaking of the stacks during the movement of the stack transport mechanism 100, effectively avoiding the position deviation of the pole pieces on the stacks, and allowing the stacks to It can withstand faster processing speeds and further improve the production efficiency of the production line.

Specifically, the placement method of the laminated CCD alignment mechanism changes according to the actual site. In this embodiment, the same type of laminated CCD alignment mechanism is placed on the same side, that is, the positive electrode laminated CCD alignment mechanism is placed on the same side. The positioning mechanisms 310 are all arranged on one side of the stack conveying mechanism 100, the negative stack CCD positioning mechanisms 320 are arranged on the other side of the stack conveying mechanism 100, and different types of stack CCD alignment mechanisms are arranged on both sides. , which can facilitate the transportation of pole pieces and facilitate the layout of equipment.

In the production process of laminated battery cells, a separator is installed between the positive and negative electrodes to separate the positive and negative electrodes to prevent the positive and negative electrodes from contacting each other. The positive and negative electrodes are staggered and stacked to form a complete single cell. The device of the present invention performs high-speed stacking under the structure of laminated battery cells.

Specifically, each stacking station 110 includes a stacking CCD alignment mechanism and a secondary diaphragm unwinding and correcting station 220, and the secondary diaphragm unwinding and correcting station 220 is located in front of the stacked CCD alignment mechanism. , that is, the stacked CCD alignment mechanism first places the pole piece, and then covers the diaphragm through the secondary diaphragm unwinding and correction station 220. After covering the diaphragm, the relative position of the pole piece and the diaphragm is fixed by the hot roller lamination positioning mechanism 120. Then the lamination conveying mechanism 100 drives the bottom diaphragm, the pole piece above the diaphragm and the secondary diaphragm to move to the lamination station 110 of the next station. If the previous lamination station 110 places the positive electrode piece , then the next lamination station 110 places the negative electrode lamination, and then the secondary diaphragm unwinding and correction station 220 above the lamination station 110 covers the diaphragm. In the same way, when the previous lamination station 110 places If the negative electrode sheet is used, the next stacking station 110 places the positive electrode sheet, and the secondary separator unwinding and correcting station 220 above the stacking station 110 covers the separator. Each stacking station 110 repeats the above steps and adjusts the number of cycles according to production needs. When the specified number of stacks is reached, the stacking transport mechanism 100 moves the single cells to the end for subsequent processing. Due to the continuous stacking method, , The lamination station 110 at the end of the lamination conveying mechanism 100 can produce a single battery cell in each process. Compared with the previous production equipment that uses diaphragms to continuously bend and stack pole pieces, the multi-station laminated battery cell of the present invention The efficiency of the thermal lamination high-speed laminating machine is faster. The previous equipment can only produce one single cell in one production cycle, and the reciprocating bending of the separator takes a lot of time, reducing production efficiency. In one round of production of the equipment of the present invention, the laminating station 110 at the end can produce a single battery core each time it passes through, and adopts the form of unwinding multiple rolls of separators, which avoids the step of repeatedly bending and covering the separators. Multi-diaphragm coverage saves time and significantly improves efficiency. In addition, the hot roller lamination positioning mechanism 120 is used to reinforce the positions of the pole pieces and the diaphragm, so that a higher number of layers can be stacked during the production process and the phenomenon of pole piece offset leading to a decrease in yield is reduced, further improving the efficiency of the production line. production efficiency to meet the needs of new energy companies for power batteries.

In some embodiments of the present invention, as shown in Figures 1 to 7, the hot roller laminating mechanism 120 includes an upper heating roller 121, which is rotatably connected above the secondary separator unwinding and correction station 220. . Specifically, the upper heating roller 121 is driven close to and away from the top of the lamination on the lamination conveying mechanism 100 by motor driving or hydraulic driving. When the driving mechanism drives the upper heating roller 121 to contact the diaphragm on the surface of the pole piece, the driving mechanism stops working to ensure The upper heating roller 121 can adapt to laminations of different heights. The roller surface of the upper heating roller 121 is in a heated state. When the roller surface contacts the diaphragm, the colloid between the diaphragm and the pole piece can be heated to increase the viscosity, and the upper heating roller 121 also exerts a certain pressure on the surface of the diaphragm to make the diaphragm and pole piece The connection between the sheets is more stable, thereby increasing the stability of the laminate transportation process.

In some embodiments of the present invention, as shown in Figures 1, 3 and 5, a single cell cutting mechanism 530 is provided at the end of the laminate conveying mechanism 100. The single cell cutting mechanism 530 is used to cut off adjacent cells. The diaphragm between the pole pieces. Specifically, the single cells produced at the end of the lamination conveying mechanism 100 are covered by multiple pieces of separators. Each piece of separator also covers the single cells of the previous lamination station 110. They need to pass through the single cell. The cutting mechanism completely cuts off the diaphragm between the two single cells to form an independent single cell as a whole. The specific structure of the single cell cutting mechanism 530 is a technical solution well known to those skilled in the art and will not be described in this embodiment.

In some embodiments of the present invention, a secondary stacking mechanism or a finished cell forming mechanism is provided on one side of the single cell cutting mechanism 530. The finished cell forming mechanism is used to glue or hot-press the finished cell. Specifically, after the single battery core is cut, it is transported to the finished battery core forming mechanism to complete subsequent processing to form finished products, or the single battery core is placed in a secondary stacking mechanism for secondary stacking. The secondary stacking mechanism can use an existing stacker or the multi-station high-speed lamination machine for thermal lamination of laminated battery cells according to the embodiment of the present invention. During the stacking process, remove the primary diaphragm unwinding and correcting station 210 and the secondary diaphragm unwinding and correcting station 220 on the lamination conveying mechanism 100, and place the single battery core instead of the pole piece into each stacked CCD for alignment. In the mechanism, individual cells are stacked to form a larger cell unit.

In some embodiments of the present invention, as shown in Figure 1, Figure 2 and Figure 4, one side of each stacked CCD alignment mechanism is provided with a corresponding chip removal station, the chip removal station, and the stacked CCD alignment mechanism. A pole piece transfer mechanism is used to move the pole pieces between the mechanism and the stacking station 110 .

Specifically, the pick-up station is filled with pole pieces waiting to be transferred to each stacked CCD alignment mechanism. Each stacked CCD alignment mechanism is equipped with a pole piece transfer mechanism. The pole piece transfer mechanism can be Structures such as suction cup manipulators, clamping manipulators, and pole piece transfer mechanisms are technical solutions well known to those skilled in the art and will not be described in the present invention. The pole piece transfer mechanism moves the pole pieces in the pole piece removal station to the corresponding stacked CCD alignment mechanism. The stacked CCD alignment mechanism performs the alignment operation on the pole pieces and then transfers the poles through the pole piece transfer mechanism. The sheets are transferred to the lamination station 110 for lamination operation.

In some embodiments of the present invention, as shown in Figures 2 to 5, the pole pieces on the chip taking station will be continuously consumed during the lamination process of the equipment. In order to replenish the pole pieces at any time to ensure that the multi-station stacked battery cells For the normal operation of the thermal lamination high-speed lamination machine, the present invention adopts two structures to supplement the pole pieces of the chip taking station.

Embodiment 1

As shown in Figures 2 and 3, including the two-pole sheet incoming conveyor belt 400, the sheet taking station is divided into two types: the positive electrode sheet taking station 411 and the negative electrode sheet taking station 412. The one-pole sheet incoming conveyor belt 400 passes through in sequence Each positive electrode piece taking station 411 is used to allow the pole piece transfer mechanism to move the positive electrode stack into the positive electrode stack CCD alignment mechanism 310. The other pole piece incoming conveyor belt 400 passes through each negative electrode piece taking station 412 in sequence. It is used to allow the pole piece transfer mechanism to move the negative electrode stack into the negative stack CCD alignment mechanism 320 .

Specifically, a pole piece incoming conveyor belt 400 is provided on both sides of the laminate conveying mechanism 100. Each pole piece incoming conveyor belt 400 only transports the same type of pole pieces, and the pole piece incoming conveyor belt 400 will Pass through the side of the laminated CCD alignment mechanism of the same type in sequence, that is, the chip taking station of the same type is set on the pole piece incoming conveyor belt 400. When the pole piece incoming conveyor belt 400 passes through the pole piece transfer mechanism, the pole piece The chip transfer mechanism moves the pole pieces from the pole piece incoming conveyor belt 400 to the stacked CCD alignment mechanism for alignment operation. When using the pole piece incoming conveyor belt 400, it is only necessary to continuously replenish the pole pieces at the starting position of the pole piece incoming conveyor belt 400.

Embodiment 2

As shown in Figure 4 and Figure 5, it includes multiple pole piece discharging mechanisms. The pole piece discharging mechanism is divided into two types: positive electrode piece discharging mechanism 510 and negative electrode piece discharging mechanism 520. The piece taking station is divided into positive electrode There are two types of chip taking station 411 and negative electrode chip taking station 412. The positive electrode piece discharging mechanism 510 is set corresponding to the positive electrode piece taking station 411, which is used to allow the pole piece transfer mechanism to move the positive electrode stack to the positive electrode stack CCD alignment. Institutional 310. The negative electrode piece discharging mechanism 520 is provided corresponding to the negative electrode piece taking station 412 and is used to allow the electrode piece transfer mechanism to move the negative electrode stack to the negative electrode stack CCD alignment mechanism 320 .

Specifically, each pole piece discharging mechanism corresponds to a piece taking station, and the produced pole pieces are transported to the piece taking station by the pole piece discharging mechanism, and then moved to the corresponding stacked CCD alignment by the pole piece transfer mechanism. in the institution.

It should be understood that the first and second embodiments of the pole piece supplementary structure of the piece taking station are not the only implementation modes. The present invention does not elaborate on the pole piece supplementary structure of the chip taking station one by one. It should be understood that without departing from the basic concept of the present invention, the flexible change of the pole piece supplementary structure of the chip taking station should be regarded as a part of the present invention. within the limited scope of protection.

The lamination method of the embodiment of the present invention is described below. The lamination method is implemented based on the multi-station laminated battery core thermal lamination high-speed lamination machine of the present invention, including a lamination conveying mechanism 100, a plurality of lamination stations 110, and a laminating machine. A primary separator unwinding and correcting station 210, a plurality of secondary separator unwinding and correcting stations 220, a plurality of hot roller lamination and positioning mechanisms 120, a plurality of positive electrode stack CCD alignment mechanisms 310, and a plurality of negative electrode stack CCD An alignment mechanism 320, a plurality of chip taking stations, a single cell cutting mechanism 530 and a plurality of pole piece transfer mechanisms.

As shown in Figure 1, Figure 2 and Figure 6, it mainly includes the following steps:

The first-level diaphragm of the S100 first-level diaphragm unwinding and correction station 210 is unrolled onto the laminating conveying mechanism 100, and the laminating conveying mechanism 100 drives the diaphragm to the laminating station 110;

The S200 pole piece transfer mechanism transfers the pole piece from the pole piece taking station to the positive pole stack CCD alignment mechanism 310 or the negative pole stack CCD alignment mechanism 320 for alignment. After the pole piece is aligned, the pole piece transfer mechanism Remove the pole piece to the lamination station 110;

The S300 stacking conveyor mechanism 100 drives the first-level diaphragm to the next stacking station 110;

The secondary diaphragm of the S400 secondary diaphragm unwinding and correction station 220 is unrolled above the pole piece and covers the pole piece;

The upper heating roller 121 of the S500 hot roller laminating positioning mechanism 120 is close to the surface of the secondary diaphragm, heating the colloid of the secondary diaphragm, so that the secondary diaphragm and the pole piece are hot pressed and laminated;

The S600 pole piece transfer mechanism transfers pole pieces from different types of stacked CCD alignment mechanisms to the stacking station 110. The pole piece transfer mechanism transfers the pole pieces to the secondary diaphragm and adjusts the pole piece position. Aligned with the pole pieces below the secondary diaphragm;

S700 cycles S300-S600 to the specified number of times;

The S800 laminated transport mechanism transports the primary separator to the single cell cutting mechanism 530, and the single cell cutting mechanism 530 cuts off the separator on one side of the finished cell;

The finished S900 battery cells are moved to the next station for secondary stacking, gluing or hot pressing.

Specifically, when the laminated CCD positioning mechanism in step S200 is the positive laminated CCD positioning mechanism 310, then the laminated CCD positioning mechanism in step S500 is the negative laminated CCD positioning mechanism 320. In the loop of step S600 , the stacked CCD alignment mechanism selects different types of stacked CCD alignment mechanisms according to the stacked CCD alignment mechanism of the previous stacking station 110 to perform the stacking operation, and according to the staggered positive and negative electrodes of the stacked cells Lamination. As shown in Figure 6, N is the number of times the battery core pole pieces are stacked. The specific number of N is set according to the specifications of different types of battery cells.

In some embodiments of the present invention, as shown in Figure 7, a hot roller lamination positioning mechanism 120 is provided in front of the secondary separator unwinding and correcting station 220, and the first layer of the primary separator unwinding and correcting station 210 is The diaphragm and the pole piece are preheated and rolled, so that the bottom pole piece and the bottom diaphragm are bonded and fixed in position.

In some embodiments of the present invention, the pole piece transfer mechanism transfers an equal number of pole pieces each time, and transfers at least one pole piece each time. Specifically, the pole piece transfer mechanism can stack one piece, two pieces, or three pieces at the same time during a lamination process, and adjust the number of laminations at the lamination station 110 according to actual production needs.

In some embodiments of the present invention, as shown in Figures 2 and 3, the feeding method according to Embodiment 1 of the pole piece supplementary structure includes a two-pole piece incoming conveyor belt 400, a plurality of positive electrode piece taking stations 411 and multiple There are three negative electrode chip taking stations 412. The positive electrode chip taking station 411 corresponds to the positive electrode stack CCD alignment mechanism 310 one-to-one, and the negative electrode chip taking station 412 corresponds to the negative electrode stack CCD alignment mechanism 320 one-to-one.

A pole piece incoming conveyor belt 400 transports the pole pieces through each positive electrode piece taking station 411 in sequence. The pole piece transfer mechanism transfers the pole pieces from the positive electrode piece taking station 411 to the positive electrode stack CCD alignment mechanism 310 for alignment. . Another pole piece incoming conveyor belt 400 transports the pole pieces through each negative electrode piece taking station 412 in sequence. The pole piece transfer mechanism transfers the pole pieces from the negative electrode piece taking station 412 to the negative electrode stack CCD alignment mechanism 320 for alignment. Bit.

In some embodiments of the present invention, as shown in Figures 4 and 5, according to the loading method of the second embodiment of the preparation electrode plate supplementary structure, a plurality of positive electrode plate discharging mechanisms 510 and a plurality of negative electrode plate discharging mechanisms are included. The mechanism 520 has a one-to-one correspondence between the positive electrode piece discharging mechanism 510 and the positive electrode stack CCD alignment mechanism 310, and the negative electrode piece discharging mechanism 520 has a one-to-one correspondence with the negative electrode stack CCD alignment mechanism 320.

The pole pieces of the positive electrode piece discharging mechanism 510 are transported to the positive electrode piece taking station 411, and the pole piece transfer mechanism transfers the pole pieces of the positive electrode piece taking station 411 to the positive electrode stack CCD alignment mechanism 310 for alignment. The pole pieces of the negative electrode piece discharging mechanism 520 are transported to the negative electrode piece taking station 412, and the pole piece transfer mechanism transfers the pole pieces of the negative electrode piece taking station 412 to the negative electrode stack CCD alignment mechanism 320 for alignment.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like is intended to be incorporated into the description of the implementation. An example or example describes a specific feature, structure, material, or characteristic that is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the invention. The scope of the invention is defined by the claims and their equivalents.

Claims

A multi-station laminated battery core thermal lamination high-speed lamination machine, which is characterized by including:

Lamination conveying mechanism (100). The laminating conveying mechanism (100) is provided with a plurality of laminating stations (110). The laminating stations (110) are along the direction of the laminating conveying mechanism (100). Extension direction arrangement;

A first-level diaphragm unwinding and correcting station is provided on one side of the starting position of the lamination conveying mechanism (100). The lamination conveying mechanism (100) drives the first-level diaphragm unwinding and correcting station (210). The diaphragms pass through the lamination station (110) in sequence;

A plurality of laminated CCD alignment mechanisms are respectively provided on both sides of the laminated sheet conveying mechanism (100). The laminated CCD aligning mechanism is divided into a positive stacked CCD aligning mechanism (310) and a negative stacked CCD pairing mechanism. There are two types of bit mechanisms (320);

Each lamination station (110) is provided with one lamination CCD positioning mechanism, wherein the lamination stations (110) arranged at intervals are correspondingly provided with the same type of lamination CCD positioning mechanism. , the lamination stations (110) arranged adjacently are provided with different types of lamination CCD alignment mechanisms;

A hot rolling lamination positioning mechanism (120) is provided correspondingly between each lamination station (110). The hot rolling lamination positioning mechanism (120) is used to heat the diaphragm and the pole piece, so that the pole piece The position of the diaphragm is fixed;

A secondary diaphragm unwinding and correcting station (220) is provided above each laminating station (110), and the secondary diaphragm unwinding and correcting station (220) is provided on the two stacked CCD pairs. between institutions.
The multi-station laminated battery core thermal lamination high-speed lamination machine according to claim 1, characterized in that the thermal roller lamination positioning mechanism (120) includes an upper heating roller (121), and the upper heating roller The roller (121) is rotatably connected above the two secondary diaphragm unwinding and correcting stations (220), and the roller surface of the upper heating roller (121) is placed with the secondary diaphragm unwinding and correcting stations (220). The diaphragm surface of the roll is in contact, which is used to promote the colloid melting between the diaphragm and the pole piece to fix the diaphragm and the pole piece.
The multi-station high-speed lamination machine for thermal lamination of laminated battery cells according to claim 2, characterized in that a single battery core cutting mechanism (530) is provided at the end of the laminated sheet conveying mechanism (100), so The single cell cutting mechanism (530) is used to cut off the diaphragm between adjacent pole pieces;

One side of the single cell cutting mechanism (530) is provided with a secondary stacking mechanism or a finished cell forming mechanism. The finished cell forming mechanism is used to glue or hot-press the finished cell.
The multi-station high-speed laminating machine for thermal lamination of laminated battery cells according to claim 1, characterized in that one side of each of the laminated CCD positioning mechanisms is provided with a chip-taking station, and the chip-taking station is A pole piece transfer mechanism is used to move the pole piece between the lamination station, the lamination CCD positioning mechanism and the lamination station (110).
The multi-station high-speed lamination machine for thermal lamination of laminated battery cells according to claim 4, characterized in that it includes a bipolar sheet incoming conveyor belt (400), and the sheet taking station is divided into a positive electrode sheet taking station. (411) and negative electrode removal station (412);

The pole piece incoming conveyor belt (400) passes through each of the positive electrode piece taking stations (411) in sequence, and is used to allow the pole piece transfer mechanism to move the positive electrode stack to the positive electrode stack CCD alignment mechanism (310) in;

The other pole piece incoming conveyor belt (400) passes through each of the negative electrode piece taking stations (412) in sequence, and is used to allow the pole piece transfer mechanism to move the negative electrode stack to the negative electrode stack CCD alignment Establishment(320).
The multi-station laminated battery core thermal lamination high-speed stacking machine according to claim 4, characterized in that it includes a plurality of pole piece discharging mechanisms, and the pole piece discharging mechanism is divided into a positive pole piece discharging mechanism. (510) and negative electrode piece discharging mechanism (520). The piece taking station is divided into two types: positive electrode piece taking station (411) and negative electrode piece taking station (412);

The positive electrode piece discharging mechanism (510) is provided corresponding to the positive electrode piece taking station (411), and is used to allow the electrode piece transfer mechanism to move the positive electrode stack to the positive electrode stack CCD alignment mechanism (310 )middle;

The negative electrode piece discharging mechanism (520) is provided corresponding to the negative electrode piece taking station (412), and is used to allow the electrode piece transfer mechanism to move the negative electrode stack to the negative electrode stack CCD alignment mechanism (320 )middle.
A lamination method, including a lamination conveying mechanism (100), a plurality of lamination stations (110), a primary diaphragm unwinding and correcting station (210), and a plurality of secondary diaphragm unwinding and correcting stations (220) , multiple hot roller laminating positioning mechanisms (120), multiple positive electrode lamination CCD positioning mechanisms (310), multiple negative electrode lamination CCD positioning mechanisms (320), multiple chip taking stations, single electrodes Core cutting mechanism (530) and multiple pole piece transfer mechanisms; it is characterized by including the following steps:

S100 The first-level diaphragm from the first-level diaphragm unwinding and correction station (210) is unrolled onto the lamination conveying mechanism (100), and the lamination conveying mechanism (100) drives the diaphragm to the lamination station. (110);

S200: The pole piece transfer mechanism transfers the pole piece from the piece taking station to the positive electrode stack CCD alignment mechanism (310) or the negative electrode stack CCD alignment mechanism (320) for alignment. , after the pole pieces are aligned, the pole piece transfer mechanism moves the pole pieces to the lamination station (110);

S300: The lamination conveying mechanism (100) drives the first-level diaphragm to the next lamination station (110);

In S400, the secondary diaphragm of the secondary diaphragm unwinding and correction station (220) is unrolled above the pole piece and covers the pole piece;

S500: The upper heating roller (121) of the hot roller lamination positioning mechanism (120) is close to the surface of the secondary diaphragm, and heats the colloid of the secondary diaphragm, so that the secondary diaphragm and the pole piece are hot pressed. overbite;

S600: The pole piece transfer mechanism transfers the pole pieces from the different types of stacked CCD alignment mechanisms to the stacking station (110). The pole piece transfer mechanism transfers the pole pieces to the on the secondary diaphragm, and adjust the position of the pole piece to align with the pole piece below the secondary diaphragm;

S700 cycles S300-S600 to the specified number of times;

S800: The laminated transport mechanism transports the primary separator to the single cell cutting mechanism (530), and the single cell cutting mechanism (530) cuts off the separator on one side of the finished cell;

The finished battery cores described in S900 are moved to the next station for secondary stacking, gluing or hot pressing.
The stacking method according to claim 7, wherein the pole piece transfer mechanism transfers an equal number of pole pieces each time, and transfers at least one pole piece each time.
The stacking method according to claim 7, characterized by comprising a bipolar sheet incoming conveyor belt (400), a plurality of positive electrode sheet taking stations (411) and a plurality of negative electrode sheet taking stations (412), The positive electrode sheet taking station (411) corresponds to the positive electrode stack CCD alignment mechanism (310) one by one, and the negative electrode sheet taking station (412) corresponds to the negative electrode stack CCD alignment mechanism (320) one by one. correspond;

The pole piece incoming conveyor belt (400) transports the pole pieces through each of the positive electrode piece taking stations (411) in sequence, and the pole piece transfer mechanism transfers the pole pieces of the positive electrode piece taking station (411). The sheet is placed in the positive electrode stack CCD alignment mechanism (310) for alignment;

The other pole piece incoming conveyor belt (400) transports the pole pieces through each of the negative electrode piece taking stations (412), and the pole piece transfer mechanism transfers the negative electrode piece taking station (412). The pole pieces are aligned in the negative electrode stack CCD alignment mechanism (320).
The stacking method according to claim 7, characterized in that it includes a plurality of positive electrode piece discharging mechanisms (510) and a plurality of negative electrode piece discharging mechanisms (520), and the positive electrode piece discharging mechanism (510) ) has a one-to-one correspondence with the positive electrode stack CCD alignment mechanism (310), and the negative electrode stack discharging mechanism (520) has a one-to-one correspondence with the negative electrode stack CCD alignment mechanism (320);

The pole pieces of the positive electrode piece discharging mechanism (510) are transported to the positive electrode piece taking station (411), and the pole piece transfer mechanism transfers the pole pieces of the positive electrode piece taking station (411). Go to the positive electrode stack CCD alignment mechanism (310) for alignment;

The pole pieces of the negative electrode piece discharging mechanism (520) are transported to the negative electrode piece taking station (412), and the pole piece transfer mechanism transfers the pole pieces of the negative electrode piece taking station (412). Go to the negative electrode stack CCD alignment mechanism (320) for alignment.