WO2023169219A1

WO2023169219A1 - Battery cell manufacturing device and preparation method

Info

Publication number: WO2023169219A1
Application number: PCT/CN2023/077864
Authority: WO
Inventors: 王奉杰; 赵留杰
Original assignee: 无锡先导智能装备股份有限公司
Priority date: 2022-03-10
Filing date: 2023-02-23
Publication date: 2023-09-14
Also published as: CN218333916U

Abstract

The present application relates to a battery cell manufacturing device, comprising a first feeding apparatus, a second feeding apparatus, a separator feeding apparatus and a winding apparatus. A first wide pole piece is divided into two parts after being cut by a first cutting mechanism, to obtain two first pole pieces, a side edge of each first electrode plate being provided with a first tab region. A second wide pole piece may also be divided into two parts after being cut by a second cutting mechanism, to obtain two second pole pieces, a side edge of each second electrode plate being provided with a second tab region. The two first pole pieces and the two second pole pieces are aligned with each other in an one-to-one correspondence, and enter the winding device together with a separator provided by the separator feeding device. In this way, a needle winding mechanism may simultaneously form two battery cells in one winding, and the tabs of the battery cells are located on two sides. Therefore, the described battery cell manufacturing apparatus is able to further improve the production efficiency of battery cells.

Description

Battery core manufacturing equipment and preparation method

Technical field

The present application relates to the technical field of lithium battery equipment, and in particular to a battery core manufacturing equipment and preparation method.

Background technique

As a rechargeable secondary battery, lithium batteries have the advantages of small size, high energy density, high cycle times and high stability, and have been widely used in automotive power batteries. Most lithium battery manufacturers currently use the winding process to prepare lithium battery cells. However, the winding machine can only wind and shape one battery core at a time, which limits the production efficiency of the battery core.

Contents of the invention

Based on this, it is necessary to provide a battery core manufacturing equipment and preparation method that can further improve the production efficiency of battery cells to address the above problems.

A battery core manufacturing equipment, including:

The first feeding device includes a first unwinding mechanism and a first cutting mechanism. The first unwinding mechanism is used to unwind the first wide pole piece. The first wide pole piece has two sides on both sides in the width direction. The edge has a first tab area extending along the length direction, and the first cutting mechanism can cut the first wide pole piece into two first pole pieces along the length direction, each of the first pole pieces One side edge of the sheet has the first tab area;

The second feeding device includes a second unwinding mechanism and a second cutting mechanism. The second unwinding mechanism is used to unwind the second wide pole piece. The middle part of the second wide pole piece has a length along the length. The second pole piece extends in the direction, and the second cutting mechanism can cut the second wide pole piece into two second pole pieces along the second pole region, and each of the second pole pieces One edge of the pole piece has the second tab area, and The two second pole pieces are respectively arranged in pairs with the two first pole pieces;

a diaphragm supply device for providing diaphragms between and outside each pair of the first pole piece and the second pole piece; and

A winding device includes a needle rolling mechanism capable of winding two first pole pieces, two second pole pieces and a plurality of separators into two electric cores;

Wherein, any one of the first pole piece and the second pole piece is a positive pole piece, and the other one is a negative pole piece.

In one embodiment, the first cutting mechanism is a first slitting mechanism, and the first slitting mechanism can divide the first wide pole piece along the middle part of the first wide pole piece. Cut the first pole piece into two.

In one embodiment, the first cutting mechanism includes a first slitting mechanism and a first die-cutting mechanism. The first slitting mechanism can cut the third wide pole piece along the middle part of the first wide pole piece. A wide pole piece is cut into two first pole pieces, and the first die-cutting mechanism can die the first tab area of each first pole piece into a multi-pole structure.

In one embodiment, the first die-cutting mechanism is located upstream of the first slitting mechanism.

In one embodiment, the second cutting mechanism is a second slitting mechanism, and the second slitting mechanism can cut the second wide pole piece into two along the second tab area. the second pole piece.

In one embodiment, the second cutting mechanism is a second die-cutting mechanism, and the second die-cutting mechanism can die-cut along the second tab area to cut the second wide width The pole piece is cut into two second pole pieces, and the second tab area of each second pole piece is die-cut into a multi-pole structure.

In one embodiment, the first feeding device further includes a first separation mechanism. The first separation mechanism includes two first separation rollers respectively used to support two first pole pieces. The rotation axis of the first separation roller is arranged at an angle; the second feeding device also includes a second separation mechanism, the The second separation mechanism includes two second separation rollers respectively used to support the two second pole pieces, and the rotation axes of the two second separation rollers are arranged at an angle.

In one embodiment, a first feeding device is further included. The first feeding device includes a first clamping mechanism and a first cutting mechanism located downstream of the first clamping mechanism. The first clamping mechanism The holding mechanism can clamp the two first pole pieces and transport them downstream, and the first cutting mechanism can cut off the two first pole pieces.

In one of the embodiments, the first feeding device further includes a first feeding correction mechanism located downstream of the first cutting mechanism, and the first feeding correction mechanism includes two first feeding correction assemblies, two The first feeding guide component can respectively clamp the two first pole pieces and can move along the width direction of the first pole pieces.

In one of the embodiments, a second feeding device is further included. The second feeding device includes a second clamping mechanism and a first cutting mechanism located downstream of the second clamping mechanism. The second clamping mechanism The holding mechanism can clamp the two second pole pieces and transport them downstream, and the second cutting mechanism can cut off the two second pole pieces.

A method for preparing battery cores using the battery core manufacturing equipment as described above, including:

Unwinding the first wide pole piece, the edges on both sides of the width direction of the first wide pole piece have first tab areas extending along the length direction;

Cut the first wide pole piece into two first pole pieces along the length direction, and one side edge of each first pole piece has the first tab area;

Unwinding the second wide pole piece, the middle part of the second wide pole piece has a second tab area extending along the length direction;

The second wide pole piece is cut into two second pole pieces along the second tab area, and one side edge of each second pole piece has the second tab area, and The two second pole pieces are respectively connected with the two The first pole pieces are arranged in pairs;

providing a separator between and outside each pair of the first pole piece and the second pole piece; and

Two first pole pieces, two second pole pieces and a plurality of separators are wound into two battery cores.

In one embodiment, cutting the first wide pole piece into two first pole pieces along the length direction includes: cutting the first wide pole piece along the middle of the first wide pole piece. The pole piece is divided into two first pole pieces.

In one embodiment, the method further includes:

Clamp the two first pole pieces and transport them downstream, and cut off the two first pole pieces;

The two second pole pieces are clamped and transported downstream, and the two second pole pieces are cut off.

In one embodiment, cutting the first wide pole piece into two first pole pieces along the length direction includes:

Divide the first wide pole piece into two first pole pieces along the middle of the first wide pole piece;

The first tab area of each first pole piece is die-cut into a multi-pole structure.

In one embodiment, cutting the second wide pole piece into two second pole pieces along the second tab area includes: die-cutting along the second tab area to The second wide pole piece is cut into two second pole pieces and the second tab area of each second pole piece is die-cut into a multi-pole structure.

In the above-mentioned battery core manufacturing equipment, the first wide pole piece is cut into two by the first cutting mechanism to obtain two first pole pieces, and one edge of each first pole piece has a first pole. ear area. The second wide pole piece can also be divided into two after being cut by the second cutting mechanism to obtain two second pole pieces, and one side edge of each second pole piece has a second tab area. The two first pole pieces are aligned with the two second pole pieces in one-to-one correspondence, and enter the winding device together with the diaphragm provided by the diaphragm feeding device. In this way, the needle rolling mechanism proceeds Two batteries can be formed at the same time in one winding, and the tabs of the batteries are located on both sides. Therefore, the above-mentioned battery cell manufacturing equipment can further improve the production efficiency of battery cells.

Description of the drawings

In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the module structure of the battery core manufacturing equipment in the preferred embodiment of the present application;

Figure 2 is a simplified schematic diagram of the process of preparing cells by the cell manufacturing equipment shown in Figure 1;

Figure 3 is a schematic diagram of the module structure of battery core manufacturing equipment in another embodiment of the present application;

FIG. 4 is a simplified schematic diagram of the process of preparing battery cells by the battery cell manufacturing equipment shown in FIG. 3 .

Detailed ways

In order to make the above objects, features and advantages of the present application more obvious and easy to understand, the specific implementation modes of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described here. Those skilled in the art can make similar improvements without violating the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

In the description of this application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", ""Back","Left","Right","Vertical","Horizontal","Top","Bottom","Inside","Outside","Clockwise","Counterclockwise","Axis" The orientation or positional relationship indicated by "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply the device or device referred to. Components must have a specific orientation, be constructed and operate in a specific orientation, Therefore, it cannot be construed as a limitation on this application.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In this application, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated into one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise specified restrictions. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In this application, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

It should be noted that when an element is referred to as being "mounted" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

Referring to FIGS. 1 and 2 , the cell manufacturing equipment 100 in the preferred embodiment of the present application includes a first feeding device 110 , a second feeding device 120 , a separator feeding device 130 and a winding device 140 .

The first feeding device 110 includes a first unwinding mechanism 111 and a first cutting mechanism 112 . Among them, the first unwinding mechanism 111 is used to unwind the first wide pole piece 10 , and the two edges of the first wide pole piece 10 in the width direction are It has a first tab area 101 extending along the length direction. The width of the first wide pole piece 10 is approximately equal to twice the width of the pole piece in the battery core 40 . The first wide pole piece 10 includes a foil and a positive or negative active material coated on both sides of the foil. The active material on both edges in the width direction of the foil is scraped off or the area is left blank when coating. After processing, the first tab area 101 can be formed.

The first cutting mechanism 112 can cut the first wide pole piece 10 into two first pole pieces 11 along the length direction. Specifically, the first cutting mechanism 112 generally cuts along the center line of the first wide pole piece 10, so the widths of the two first pole pieces 11 obtained are the same. Tension adjustment assemblies (not labeled) are generally provided on the transmission paths of the two first pole pieces 11 respectively, which are used to adjust the tension of the two first pole pieces 11 to ensure normal transportation.

In order to effectively separate the two cut first pole pieces 11 to avoid interference with each other in subsequent processes. Specifically in this embodiment, the first feeding device 110 also includes a first separation mechanism 114. The first separation mechanism 114 includes two first separation rollers 1141 respectively used to support the two first pole pieces 11. The two first separation rollers 1141 are respectively used to support the two first pole pieces 11. The rotation axis of a separation roller 1141 is arranged at an angle.

The two cut first pole pieces 11 can pass through the two first separation rollers 1141 respectively, because the rotation axes of the two first separation rollers 1141 are not on the same straight line. Therefore, as the first separation roller 1141 rotates, the two first pole pieces 11 will be driven to move apart in the width direction, that is, in the direction perpendicular to the plane of the drawing as shown in FIG. 1 .

Furthermore, one side edge of each first pole piece 11 has a first tab area 101. That is, after the original first wide pole piece 10 is cut, the first tab areas 101 on both sides of the original wide pole piece 10 will be respectively located at the edges of the two first pole pieces 11 . Moreover, the first tab areas 101 on the two first pole pieces 11 are arranged away from each other in the width direction, that is, perpendicular to the plane of the drawing as shown in FIG. 1 .

The first tab area 101 can be used to make the tabs 41 of the produced battery core 40 . Wherein, the pole tab 41 of the battery core 40 includes a positive pole tab and a negative pole tab. When the first pole piece 11 is the positive pole piece, the first tab area 101 can be made into a positive electrode tab. When the first pole piece 11 is a negative electrode piece, the first tab area 101 can be made into a negative electrode tab. Specifically, in this embodiment, the first pole piece 11 is a positive pole piece, so the first pole region 101 can be made into a positive pole. It should be noted that the tabs 41 of the battery core 40 may have a full-tab structure or a multi-tab structure.

In this embodiment, the first cutting mechanism 112 includes a first cutting mechanism 1121 and a first die-cutting mechanism 1122. The first cutting mechanism 1121 can cut the first wide pole piece 110 along the middle part of the first wide pole piece 110. The sheet 10 is cut into two first pole pieces 11, and the first die-cutting mechanism 1122 can die-cut the first tab area 101 of each first pole piece 11 into a multi-pole structure.

The first cutting mechanism 1121 can cut the first wide pole piece 10 using roller cutting, laser cutting or blade rotating cutting. The first die-cutting mechanism 1122 generally includes two die-cutting components (not shown), which are used to die-cut the first tab areas 101 on both sides of the first wide-width pole piece 10 respectively. The die-cutting components can be laser-cut. Die cutting is achieved by cutting. Each die-cutting component can die-cut the corresponding first tab area 101 into a zigzag shape to obtain a plurality of tabs spaced apart along the length direction of the first wide pole piece 10, so that the first tab area 101 Form a multi-pole ear structure. Therefore, the positive tab in the battery core 40 has a multi-pole structure.

Further, in this embodiment, the first die-cutting mechanism 1122 is located upstream of the first slitting mechanism 1121 . That is to say, before the first cutting mechanism 1121 cuts the first wide pole piece 10, the first die cutting mechanism 1122 cuts the first tab areas 101 on both sides of the first wide pole piece 10. die cut. At this time, since the first wide pole piece 10 has not been cut, the first tab areas 102 on both sides are an integral structure, so it is more convenient for the two die-cut components to be separated from the first tab areas 102 on both sides. 101 achieves counterpoint.

Please refer to FIGS. 3 and 4 together. In another embodiment, the first cutting mechanism 112 is a first slitting mechanism. The first slitting mechanism can cut the first wide pole piece 10 along the middle part of the first wide pole piece 10 . The width pole piece 10 is divided into two first pole pieces 11 . Since a die-cutting mechanism is not provided, the first tab area 101 on the edge of the first pole piece 11 will not be die-cut. In this way, the first tab area 101 will have a complete elongated structure. therefore, The positive electrode tab in the produced battery core 40 has an all-pole tab structure.

Please refer to FIG. 1 and FIG. 2 again. The second feeding device 120 in the preferred embodiment of the present application includes a second unwinding mechanism 121 and a second cutting mechanism 122 . The second unwinding mechanism 121 is used to unwind the second wide pole piece 20 , and the second wide pole piece 20 has a second tab area 201 extending along the length direction in the middle. The width of the second wide pole piece 20 is the same as the width of the first wide pole piece 10 , and is also approximately equal to twice the width of the pole piece in the battery core 40 . Similarly, the second wide pole piece 20 includes a foil and active material coated on both sides of the foil. The active material in the middle area of the foil is scraped off or the area is left blank when coating. The second tab area 201 is formed.

The polarity of the active material on the surface of the second wide pole piece 20 and the first wide pole piece 10 is opposite. Either one of the first pole piece 11 and the second pole piece 21 is a positive pole piece, and the other is a negative pole piece. . Specifically, in this embodiment, since the first pole piece 11 is a positive pole piece, the second pole piece 21 is a negative pole piece.

The second cutting mechanism 122 can cut the second wide pole piece 20 into two second pole pieces 21 along the second tab area 201 , and each second pole piece 21 has a second tab on one edge thereof. Area 201. Specifically, the second cutting mechanism 122 can cut along the center line of the second tab area 201 and divide the second tab area 201 into two. In this way, the second wide pole piece 20 will also be divided into two, and both second pole pieces 21 will have the second tab area 201 on one side. Tension adjustment assemblies (not labeled) are generally provided on the transmission routes of the two second pole pieces 21 respectively, which are used to adjust the tension of the two second pole pieces 21 to ensure normal transportation.

In addition, in order to effectively separate the two cut second pole pieces 21 to avoid interference with each other in subsequent processes. Specifically in this embodiment, the second feeding device 120 also includes a second separation mechanism 124. The second separation mechanism 124 includes two second separation rollers 1241 respectively used to support the two second pole pieces 21. The rotation axes of the two separation rollers 1241 are arranged at an angle. The structures and functions of the second separation mechanism 124 and the first separation mechanism 114 can be complete, so no details are given.

Moreover, the first tab areas 201 on the two second pole pieces 11 are arranged toward each other in the width direction, that is, perpendicular to the plane of the drawing as shown in FIG. 1 . It can be seen that the directions of the second tab areas 201 of the two second pole pieces 21 and the first tab areas 101 of the two first pole pieces 11 are opposite. The second tab area 201 can also be used to make the tabs 41 of the produced battery core 40 . Specifically, in this embodiment, the second tab area 201 can produce a negative electrode tab.

In this embodiment, the second cutting mechanism 122 is a second die-cutting mechanism, and the second die-cutting mechanism can die-cut along the second tab area 201 to cut the second wide pole piece 20 into two pieces. second pole pieces 21, and the second tab area 201 of each second pole piece 21 is die-cut into a multi-pole structure.

Compared with the above-mentioned first die-cutting mechanism 1122, the second die-cutting mechanism as the second cutting mechanism 122 has two die-cutting components in different locations. The two die-cutting components are closer to the middle of the second wide pole piece 20. . Two die-cutting components can be die-cut along the middle of the second tab area 201 to divide the second tab area 201 together with the second wide pole piece 20 into two. At the same time, the two die-cutting components can also die-cut the two divided second tab areas 201 into zigzag shapes, so that the second tab areas 201 of each second pole piece 21 form multi-pole tabs. structure. Therefore, the negative electrode tab in the produced battery core 40 has a multi-pole tab structure.

Please refer to FIGS. 3 and 4 again. In another embodiment, the second cutting mechanism 122 is a second slitting mechanism. The second slitting mechanism can cut the second wide pole piece 20 along the second tab area 201 . Cut into two second pole pieces 21. The structure and function of the second cutting mechanism as the second cutting mechanism 122 can be the same as the above-mentioned first cutting mechanism 1121. It can be seen that the second tab area 201 will not be die-cut, so the second tab area 201 will form a full tab structure. Therefore, the negative electrode tab in the produced battery core 40 also has an all-tab structure.

Furthermore, the two second pole pieces 21 produced by the second feeding device 120 are arranged in pairs with the two first pole pieces 11 produced by the first feeding device 110 . The second pole piece 21 is aligned with the paired first pole piece 11 in the width direction, that is, perpendicular to the plane of the drawing as shown in FIG. 1 .

The diaphragm feeding device 130 is used to provide the diaphragm between and outside each pair of first pole pieces 11 and second pole pieces 21 . Provide diaphragm 30. Specifically, for each pair of first pole piece 11 and second pole piece 21 , a diaphragm 130 is provided between them, and a diaphragm 130 is also provided outside the first pole piece 11 or the second pole piece 21 . The separator feeding device 130 can use an unwinding reel 131 to unwind the separator 30 , and the number of the unwinding reels 131 can be set according to the number of separators 30 that need to be provided. Moreover, a tension control mechanism (not labeled) is provided on the conveying path of each diaphragm 30, which can be used to control the tension of multiple diaphragms 30 respectively. For this embodiment, the diaphragm feeding device 130 needs to provide four diaphragms 30 , so the diaphragm feeding device 130 includes four unwinding reels 131 .

The first pole piece 11 is aligned with the paired second pole piece 21 . Specifically, in the width direction of the first pole piece 11 and the second pole piece 21 , that is, in the direction perpendicular to the plane of the drawing as shown in FIG. 1 , the two edges of the first pole piece 11 and the second pole piece 21 are aligned.

In order to improve the alignment accuracy of the first pole piece 11 and the second pole piece 21, specifically in this embodiment, the first feeding device 110 also includes a first process correction mechanism 115. The first process correction mechanism 115 includes two first process correction mechanisms. Process correction components (not labeled in the figure), each first process correction component can correct the warp of the first pole piece 11 . Specifically, the first process correction component may use an existing correction component such as a serpentine correction component to correct the first pole piece 11 from various aspects such as height and angle.

The reason is the same as above. Specifically, in this embodiment, the second feeding device 120 also includes a second process correction mechanism 125. The second process correction mechanism 125 includes two second process correction components (not labeled), each second process correction component. The deflection correction component can correct the deflection of the wound second pole piece 21 . The structure of the second process correction mechanism 125 may be the same as that of the first process correction mechanism 115, so no details will be described again.

The winding device 140 includes a needle winding mechanism 141 . Among them, the winding needle mechanism 141 can wind the two first pole pieces 11 , the two second pole pieces 21 and the plurality of separators 30 into two battery cores 40 . Specifically, when the two first pole pieces 11 , the two second pole pieces 21 and the plurality of diaphragms 30 enter the winding device 140 , they are divided into two groups of material strips, one of which includes a first pole piece 11 and a plurality of separators 30 . A pair of second pole pieces 21 and two diaphragms 30, Another set of material strips includes another first pole piece 11 , another paired second pole piece 21 and two diaphragms 30 . Moreover, the winding starting ends of the two sets of material strips are spaced apart in the longitudinal direction of the winding needle mechanism 141, that is, the direction perpendicular to the plane of the drawing as shown in FIG. 1 .

At this time, when the winding needle mechanism 141 rotates, it will drive two sets of material strips to be wound at the same time, thereby forming two electric cores 40 at the same time. The two wound electric cores 40 will be formed along the length of the rolling needle mechanism 141 Interval setting in direction. Moreover, since the first tab area 101 on the first pole piece 11 and the second tab area 201 on the second pole piece 21 are located on different sides. Therefore, the tabs 41 of the wound battery core 40 will also be distributed on different two sides of the battery core 40 .

In this embodiment, the winding device 140 also includes a turntable 142. A plurality of needle winding mechanisms 141 are arranged on the turntable 142. The rotation of the turntable 142 can drive the plurality of needle winding mechanisms 141 to sequentially transfer to a position where the first pole piece 11 and the second pole piece 11 can be obtained. The positions of pole piece 21 and diaphragm 30.

The turntable 142 can be connected to a driving mechanism such as a motor, and can rotate at a certain angle each time driven by the driving mechanism. After the first two electric cores 40 are wound, the turntable 142 rotates and the next needle winding mechanism 141 is rotated to the winding station (that is, the positions of the first pole piece 11 , the second pole piece 21 and the separator 30 can be obtained ); then, the next winding needle mechanism 141 extends and fixes the winding starting ends of the two sets of strips; after the first two batteries 40 are cut off from the ends of the strips, the next winding needle mechanism 141 can roll Wind to prepare the other two battery cores 40 . By analogy, multiple winding needle mechanisms 141 can alternately enter the winding station and wind the battery core 40, which can increase the production cycle and reduce waiting time, thereby further improving production efficiency.

In order to enable the two electric cores 40 to complete winding on the needle winding mechanism 141 at the same time, the length of the needle winding mechanism 141 in this embodiment needs to be significantly extended compared to the needle winding mechanism in the prior art. Obviously, in other embodiments, the winding device 140 may also be provided with two turntables 142 and multiple needle winding mechanisms 141 located on the turntables 142 . The sides of the two turntables 142 equipped with the needle rolling mechanism 141 are arranged facing each other, and the plurality of needle rolling mechanisms 141 correspond to each other, and the two turntables 142 can rotate synchronously. When winding, the two sets of tapes are wound up The starting ends can be respectively located on the two winding needle mechanisms 141 in one-to-one correspondence, so the two electric cores 40 will be wound on two different two winding needle mechanisms 140 .

Please refer to FIG. 1 again. In this embodiment, the battery core manufacturing equipment 100 also includes a first feeding device 150. The first feeding device 150 includes a first clamping mechanism 151 and a battery located downstream of the first clamping mechanism 151. The first cutting mechanism 152 and the first clamping mechanism 151 can clamp the two first pole pieces 11 and transport them downstream, and the first cutting mechanism 152 can cut the two first pole pieces 11 .

The first clamping mechanism 151 can use two oppositely arranged clamping rollers, and the two clamping rollers can be close to each other to clamp the two first pole pieces 11 at the same time. After the first clamping mechanism 151 clamps the two first pole pieces 11, it can be transported downstream, that is, the winding device 140, so that the two first pole pieces 11 can smoothly enter the winding needle mechanism 141, thereby ensuring the winding process. Can be done continuously. Specifically, after the first two battery cores 40 are wound, the first clamping mechanism 151 clamps the two first pole pieces 11 at the same time, and the first cutting mechanism 152 cuts the two first pole pieces 11 at the same time. Then, the first clamping mechanism 151 inserts the two clamped first pole pieces 11 into the next winding needle mechanism 141 at the same time, and the winding process can continue.

Further, in this embodiment, the first feeding device 150 also includes a first feeding correction mechanism 153 located downstream of the first cutting mechanism 152. The first feeding correction mechanism 153 includes two first feeding correction components ( Figure (not labeled), the two first feeding guide assemblies can clamp the two first pole pieces 11 respectively, and can move along the width direction of the first pole pieces 11 .

The two first feeding guide assemblies are spaced apart along the direction perpendicular to the plane of the drawing, that is, the width direction of the first pole piece 11 . The two first feeding correction assemblies can further adjust the positions of the two first pole pieces 11 so that the first pole piece 11 can maintain a higher height with the diaphragm 30 and the second pole piece 21 in the same group of material strips. Alignment accuracy, thereby helping to improve the quality of the battery core 40 .

Specifically in this embodiment, each first feeding guide assembly includes two first guide rollers 1531 arranged oppositely. The two first guide rollers 1531 can move relatively to clamp the first pole piece 11, and one of them is The first correction roller 1531 is a driving roller.

After the correction is completed, the first correction roller 1531 as the driving roller can rotate around its own axis and drive the clamped first pole piece 11 to be transported toward the needle winding mechanism 141 . That is to say, the first clamping mechanism 151 only needs to send the two first pole pieces 11 into the two first feeding correction assemblies at the same time.

In order to smoothly feed the two second pole pieces 21 into the needle rolling mechanism 141, specifically in this embodiment, the battery core manufacturing equipment also includes a second feeding device 160, and the second feeding device 160 includes a second clamping mechanism 161 and a second cutting mechanism 162 located downstream of the second clamping mechanism 161. The second clamping mechanism 161 can clamp the two second pole pieces 21 and transport them downstream. The second cutting mechanism 162 can cut off the two second poles. Film 21.

The second feeding device 160 also includes a second feeding deviation correction mechanism 163 . It should be noted that the structure and working principle of the second feeding device 160 can be exactly the same as that of the first feeding device 150, so no further description is given.

In the above-mentioned battery core manufacturing equipment 100, the first wide pole piece 10 is cut into two by the first cutting mechanism 112 to obtain two first pole pieces 11, one side edge of each first pole piece 11 Both have a first tab area 101 . The second wide pole piece 20 can also be divided into two after being cut by the second cutting mechanism 122 to obtain two second pole pieces 21, and one side edge of each second pole piece 21 has a second Polar ear area 201. The two first pole pieces 11 and the two second pole pieces 21 are aligned in one-to-one correspondence, and enter the winding device 140 together with the separator 30 provided by the separator feeding device 130 . In this way, the needle rolling mechanism 141 can form two electric cores 40 at the same time by performing one winding operation, and the tabs 41 of the electric cores 40 are located on both sides. Therefore, the above-mentioned battery cell manufacturing equipment 10 can further improve the production efficiency of battery cells.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-mentioned embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed. However, this should not be construed as a limitation on the scope of the patent. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

A battery core manufacturing equipment, characterized by including:

The first feeding device includes a first unwinding mechanism and a first cutting mechanism. The first unwinding mechanism is used to unwind the first wide pole piece. The first wide pole piece has two sides on both sides in the width direction. The edge has a first tab area extending along the length direction, and the first cutting mechanism can cut the first wide pole piece into two first pole pieces along the length direction, each of the first pole pieces One side edge of the sheet has the first tab area;

The second feeding device includes a second unwinding mechanism and a second cutting mechanism. The second unwinding mechanism is used to unwind the second wide pole piece. The middle part of the second wide pole piece has a length along the length. The second pole piece extends in the direction, and the second cutting mechanism can cut the second wide pole piece into two second pole pieces along the second pole region, and each of the second pole pieces One side edge of the pole piece has the second pole area, and the two second pole pieces are respectively arranged in pairs with the two first pole pieces;

a diaphragm supply device for providing diaphragms between and outside each pair of the first pole piece and the second pole piece; and

A winding device includes a needle rolling mechanism capable of winding two first pole pieces, two second pole pieces and a plurality of separators into two electric cores;

Wherein, any one of the first pole piece and the second pole piece is a positive pole piece, and the other one is a negative pole piece.
The battery core manufacturing equipment according to claim 1, characterized in that the first cutting mechanism is a first slitting mechanism, and the first slitting mechanism can cut the first wide pole piece along the middle part of the first wide pole piece. The first wide pole piece is divided into two first pole pieces.
The battery core manufacturing equipment according to claim 1, wherein the first cutting mechanism includes a first slitting mechanism and a first die-cutting mechanism, and the first slitting mechanism can move along the first width. The middle part of the width pole piece cuts the first wide pole piece into two first pole pieces, and the first die-cutting mechanism can cut the first tab of each first pole piece. Areas die-cut into multi-lug structures.
The battery core manufacturing equipment according to claim 3, wherein the first die-cutting mechanism is located upstream of the first slitting mechanism.
The battery core manufacturing equipment according to claim 2, characterized in that the second cutting mechanism is a second slitting mechanism, and the second slitting mechanism can cut the first tab area along the second tab area. The two wide pole pieces are divided into two second pole pieces.
The battery core manufacturing equipment according to claim 3, characterized in that the second cutting mechanism is a second die-cutting mechanism, and the second die-cutting mechanism can die-cut along the second tab area. , to cut the second wide pole piece into two second pole pieces and die the second tab area of each second pole piece into a multi-pole structure.
The battery core manufacturing equipment according to claim 1, wherein the first feeding device further includes a first separation mechanism, and the first separation mechanism includes two first pole pieces respectively used to support the two first pole pieces. Two first separation rollers, the rotation axes of the two first separation rollers are arranged at an angle; the second feeding device also includes a second separation mechanism, the second separation mechanism includes two components respectively for supporting the two first separation rollers. As for the two second separation rollers of the second pole piece, the rotation axes of the two second separation rollers are arranged at an angle.
The battery core manufacturing equipment according to claim 1, further comprising a first feeding device, the first feeding device including a first clamping mechanism and a third clamping mechanism located downstream of the first clamping mechanism. A cutting mechanism, the first clamping mechanism can clamp the two first pole pieces and transport them downstream, and the first cutting mechanism can cut off the two first pole pieces.
The battery core manufacturing equipment according to claim 8, wherein the first feeding device further includes a first feeding correction mechanism located downstream of the first cutting mechanism, and the first feeding correction mechanism includes two The first feeding guide assembly, the two first feeding guide assemblies can respectively clamp the two first pole pieces and can move along the width direction of the first pole pieces.
The battery core manufacturing equipment according to claim 1, further comprising a second feeding material device, the second feeding device includes a second clamping mechanism and a first cutting mechanism located downstream of the second clamping mechanism, the second clamping mechanism can clamp two second pole pieces And transported downstream, the second cutting mechanism can cut off the two second pole pieces.
A method for preparing battery cores using the battery core manufacturing equipment according to any one of claims 1 to 10, characterized in that it includes:

Unwinding the first wide pole piece, the edges on both sides of the width direction of the first wide pole piece have first tab areas extending along the length direction;

Cut the first wide pole piece into two first pole pieces along the length direction, and one side edge of each first pole piece has the first tab area;

Unwinding the second wide pole piece, the middle part of the second wide pole piece has a second tab area extending along the length direction;

The second wide pole piece is cut into two second pole pieces along the second tab area, and one side edge of each second pole piece has the second tab area, and The two second pole pieces are respectively arranged in pairs with the two first pole pieces;

providing a separator between and outside each pair of the first pole piece and the second pole piece; and

Two first pole pieces, two second pole pieces and a plurality of separators are wound into two battery cores.
The method according to claim 11, wherein cutting the first wide pole piece into two first pole pieces along the length direction includes: cutting the first wide pole piece along the middle part of the first wide pole piece. The first wide pole piece is divided into two first pole pieces.
The method according to claim 11, further comprising:

Clamp the two first pole pieces and transport them downstream, and cut off the two first pole pieces;

The two second pole pieces are clamped and transported downstream, and the two second pole pieces are cut off.
The method according to claim 11, characterized in that said first wide pole piece Cutting into two first pole pieces along the length direction includes:

Divide the first wide pole piece into two first pole pieces along the middle of the first wide pole piece;

The first tab area of each first pole piece is die-cut into a multi-pole structure.
The method of claim 11, wherein cutting the second wide pole piece into two second pole pieces along the second tab area includes: cutting the second wide pole piece into two second pole pieces along the second tab area. The second wide pole piece is die-cut into two second pole pieces and the second tab area of each second pole piece is die-cut into multi-pole tabs. structure.