CN212277283U

CN212277283U - Battery core and battery core lamination device

Info

Publication number: CN212277283U
Application number: CN202020855549.XU
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuxi Lead Intelligent Equipment Co Ltd
Current assignee: Wuxi Lead Intelligent Equipment Co Ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-01-01
Anticipated expiration: 2030-05-20

Abstract

The utility model relates to an electric core, this electric core include a plurality of pole pieces and the diaphragm of centre gripping between two adjacent pole pieces of range upon range of setting, and the polarity of two adjacent pole pieces is opposite, and the pole piece is half scribbled the pole piece including two outmost that are located electric core to the pole piece. The semi-coating pole piece comprises a base material and an electrode layer formed on one side of the base material, which faces the middle part of the battery cell, wherein the electrode layer is not formed on the outer side of the base material. That is, the outer surface of the processed cell is a substrate. The base material can not conduct electricity, so that the battery cell can be ensured to normally realize the function even if the surface of the battery cell is not coated with the diaphragm. Therefore, the battery core can be free from tail winding operation, so that the battery production cost can be saved, and the production efficiency can be improved. Furthermore, the utility model also provides an electricity core lamination device.

Description

Battery core and battery core lamination device

Technical Field

The utility model relates to a battery processing technology field, in particular to electricity core and electricity core lamination device.

Background

The battery core is a core component of the battery, and the battery core of the lithium battery is formed by stacking a plurality of layers of pole pieces and diaphragms among the pole pieces. After the common battery cells are stacked and formed, a tail winding operation is also required. The so-called tail winding is to wrap a long section of diaphragm on the outermost layer of the battery core and wind the diaphragm on the battery core. Therefore, the pole piece is wrapped by the diaphragm in the finally obtained battery core.

The tail roll operation requires the reliance on specialized equipment, which can result in increased costs. And moreover, a new process is added to the tail coil, so that the production cycle of the battery is prolonged. It can be seen that the production cost and efficiency of the battery are low due to the need of tail winding for the common battery core.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a battery cell without a tail winding for solving the problems of high battery production cost and low efficiency caused by the battery cell tail winding.

The utility model provides an electric core, includes a plurality of pole pieces of range upon range of setting and centre gripping in adjacent two the diaphragm between the pole piece, and adjacent two the polarity of pole piece is opposite, the pole piece is including being located the outmost two half pole pieces of scribbling of electric core, half pole piece including the substrate and formed at the substrate orientation the electrode layer of the middle part one side of electric core.

In one embodiment, the pole pieces further comprise a first double-coated pole piece positioned between the two half-coated pole pieces.

In one embodiment, the pole pieces further comprise a second double-coated pole piece and a third double-coated pole piece positioned between the two half-coated pole pieces, wherein the second double-coated pole piece and the third double-coated pole piece are opposite in polarity and are stacked alternately.

The outermost layer of the battery core is a half-coated pole piece, an electrode layer on the half-coated pole piece is formed on one side, facing the middle part of the battery core, of the base material, and the outer side of the base material is not provided with the electrode layer. That is, the outer surface of the processed cell is a substrate. The base material can not conduct electricity, so that the battery cell can be ensured to normally realize the function even if the surface of the battery cell is not coated with the diaphragm. Therefore, the battery core can be free from tail winding operation, so that the battery production cost can be saved, and the production efficiency can be improved.

Furthermore, the utility model also provides an electricity core lamination device.

The utility model provides an electricity core lamination device is equipped with and piles up the station and get the material station, its characterized in that, electricity core lamination device includes:

the lamination table is arranged at the stacking station;

the carrying mechanism is used for carrying the pole pieces placed at the material taking station to the lamination table for stacking;

the laminating mechanism is used for laminating a diaphragm with a preset length in the range of the laminating table;

the material taking station comprises a first material taking station used for placing a half-coated pole piece, a second material taking station and a third material taking station used for placing a double-coated pole piece, the half-coated pole piece comprises a base material and an electrode layer formed on one side of the base material, and the directions of the half-coated pole piece on the first material taking station and the second material taking station are opposite.

In one embodiment, the third material taking station is located on one side of the lamination table, the first material taking station and the second material taking station are located on one side of the lamination table opposite to the third material taking station, and the carrying mechanism includes a first carrying mechanism and a second carrying mechanism, the first carrying mechanism is used for carrying the pole pieces of the first material taking station and the second material taking station to the lamination table, and the second carrying mechanism is used for carrying the pole piece of the third material taking station to the lamination table.

In one embodiment, the film covering mechanism includes:

the film pulling mechanism is used for pulling the diaphragm with a preset length from the material placing roll to the range of the laminating table;

and the film cutting mechanism is used for cutting the diaphragm which is pulled by the film pulling mechanism and has a preset length.

In one embodiment, the film covering mechanism further comprises a clamping mechanism, and the membrane pulled by the film pulling mechanism can pass through the clamping mechanism and be clamped.

In one embodiment, the pole piece stacking machine further comprises a deviation rectifying mechanism, the carrying mechanism is further used for carrying the pole piece placed on the material taking station to the deviation rectifying mechanism and carrying the pole piece positioned on the deviation rectifying mechanism to the lamination stacking table for stacking, and the deviation rectifying mechanism can drive the pole piece to be adjusted to a preset position.

In one embodiment, the feeding device further comprises a material storage mechanism arranged at the material taking station, wherein the material storage mechanism comprises a material box and a material box lifting mechanism which is in transmission connection with the material box and can drive the pole pieces in the material box to lift.

In one embodiment, the laminating mechanism comprises a pressing plate, and the laminating mechanism has a laminating state that the pressing plate is pressed on the surface of the lamination table, and an opening state that the pressing plate gives way to the surface of the lamination table.

In one embodiment, the laminating machine further comprises a lifting base, and the laminating table and the laminating mechanism are mounted on the lifting base and can be driven by the lifting base to lift.

In one embodiment, the lifting base comprises:

a first support;

the first lifting mechanism is fixed on the first support;

the second support is slidably arranged on the first support and is in transmission connection with the driving end of the first lifting mechanism, and the pressing mechanism is arranged on the second support;

and the lamination table is slidably arranged on the second support and is in transmission connection with the driving end of the second lifting mechanism.

In one embodiment, the pressing mechanism further includes a transverse driving member fixedly disposed, a connecting plate in transmission connection with the transverse driving member, and a longitudinal driving member fixed on the connecting plate, and the pressing plate is in transmission connection with the longitudinal driving member.

In one embodiment, the pressing mechanism further includes a buffer member, and two ends of the buffer member are respectively connected to the connecting plate and the pressing plate.

According to the battery cell lamination device, before lamination operation, the half-coated pole piece can be placed at the first material taking station and the second material taking station, and the double-coated pole piece can be placed at the third material taking station. The carrying mechanism carries the half-coated pole piece with the electrode layer facing upwards to the lamination table from one of the first material taking station and the second material taking station, and then carries the double-coated pole piece from the third material taking station to be sequentially stacked on the lamination table. And finally, carrying the half-coated pole piece with the electrode layer facing downwards from the other of the first material taking station and the second material taking station. Therefore, the battery cell with two half-coated pole pieces at the outermost layer can be obtained.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electrical core in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an electrical core in another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a cell lamination device according to an embodiment of the present invention;

fig. 4 is a front view of a lamination table and a lifting base in the cell lamination device shown in fig. 3;

fig. 5 is a side view of the lamination table and the lifting base shown in fig. 4.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are 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 invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 and fig. 2, the present invention provides a battery cell 100. The cell 100 may be packaged in a casing to prepare a lithium ion battery. The battery cell 100 includes a plurality of pole pieces 110 and a diaphragm 120.

The pole piece 110 serves as the positive or negative electrode of the battery. Therefore, the pole piece 110 is divided into two types, i.e., a positive pole piece and a negative pole piece, according to the polarity division. The plurality of pole pieces 110 are stacked, and the polarities of two adjacent pole pieces 110 are opposite. That is, adjacent to the negative electrode tab is a positive electrode tab, and adjacent to the positive electrode tab is a negative electrode tab.

The electrode sheet 110 generally includes a substrate (not shown) and an electrode layer (not shown) formed on the surface of the substrate. For lithium batteries, the positive electrode sheet is generally prepared by coating aluminum platinum with a slurry containing lithium ions, while the negative electrode sheet is generally prepared by coating copper platinum with a slurry containing graphite as a main component.

The diaphragm 120 is sandwiched between two adjacent pole pieces 110. That is, a separator 120 is disposed between the positive electrode plate and the negative electrode plate to separate the positive electrode and the negative electrode. Therefore, the separator 120 serves to prevent a short circuit caused by contact of both electrodes inside the battery. Meanwhile, the separator 120 has the ability to pass ions in the electrolyte. The common separator 120 is a PE (polyethylene) film, a PP (polypropylene) film, and may be formed as a single layer film or a multi-layer film structure according to process requirements.

Further, the pole piece 110 includes two half-coated pole pieces 111 located at the outermost layer of the battery cell 100. The half-coating sheet 111 includes a substrate (not shown) and an electrode layer (not shown) formed on a side of the substrate facing the middle of the battery cell 100. Taking fig. 1 and fig. 2 as an example, the battery cell 100 has two half-painted sheets 111 at the bottom and the top, in the half-painted sheet 111 at the top, the electrode layer is formed on the lower surface of the substrate, and in the half-painted sheet 111 at the bottom, the electrode layer is formed on the upper surface of the substrate.

The two half-coated pole pieces 111 have the same polarity and can be both negative pole pieces or positive pole pieces. Only one side of the half-painted sheet 111 is formed with an electrode layer. Therefore, the outermost layer of the processed cell is a base material. The substrate is not conductive, so that the battery core 100 and the shell are matched to prepare the battery, and the short circuit caused by the short circuit with the shell is avoided. That is, even if the surface of the battery cell 100 is not coated with the separator, the battery cell 100 can be ensured to normally perform its function. Therefore, the above-described battery cell 100 lamination may be completed without performing a tail winding operation.

The conventional pole piece applied to battery fabrication is different from the half-coated pole piece 111 in that electrode layers are formed on both sides of a substrate thereof. In this application, the conventional pole piece is referred to as a double-coated pole piece because both sides are coated with electrode layers. The pole piece 110 further includes at least one conventional pole piece, and the conventional pole pieces are located between the two half-coated pole pieces 111 according to different configurations of the battery cell 100.

As shown in FIG. 1, in one embodiment, the pole piece 110 further includes a first double-coated pole piece 112 positioned between two half-coated pole pieces 111.

At this time, the battery cell 100 has a three-layer structure, and a first double-coating sheet 112 is sandwiched between two half-coating sheets 111. If the polarity of the half-coating 111 is positive, the polarity of the first double-coating 112 is negative, and vice versa. Therefore, the thickness of the battery cell 100 is small, and the battery cell is suitable for producing ultra-thin batteries.

In another embodiment, as shown in fig. 2, the pole piece 110 further comprises a second double-coated pole piece 113 and a third double-coated pole piece 114 positioned between the two half-coated pole pieces 111, wherein the second double-coated pole piece 113 and the third double-coated pole piece 114 have opposite polarities and are alternately laminated.

At this time, the battery cell 100 has a multilayer structure, and is suitable for producing a large battery. The second double-coated sheet 113 and the third double-coated sheet 114 are generally identical in structure to the first double-coated sheet 112 in the previous embodiment, and are both double-coated sheets.

The outermost layer of the battery cell 100 is a half-coated electrode sheet 111, an electrode layer on the half-coated electrode sheet 111 is formed on one side of the substrate facing the middle of the battery cell 100, and no electrode layer is formed on the outer side of the substrate. That is, the outer surface of the processed battery cell 100 is a base material. The substrate is not conductive, so that the battery cell 100 can be ensured to normally realize the function thereof even if the surface of the battery cell is not coated with the diaphragm. Therefore, the battery cell 100 does not need to be subjected to tail winding operation, so that the battery production cost can be saved and the production efficiency can be improved.

Referring to fig. 3, the present invention further provides a battery cell stacking apparatus 200, which is provided with a stacking station and a material-taking station. This cell lamination device 200 is used to stack the pole pieces to prepare the cell. The cell stacking apparatus 200 includes a stacking table 210, a carrying mechanism 220, and a film covering mechanism 230.

The lamination station 210 is disposed at the stacking station. A plurality of pole pieces are stacked on the lamination stage 210, and then the battery cell is obtained. The lamination stage 210 has high rigidity and is not easily deformed. Moreover, the lamination stage 210 has a flat surface, and can perform a better bearing and supporting function on the pole pieces.

The carrying mechanism 220 is used for carrying the pole pieces placed at the material taking station to the lamination table 210 for stacking. The handling mechanism 220 may be a guide rail that extends between the picking station and the stacking station and a suction cup slidably mounted to the guide rail. The material taking stations comprise a first material taking station 301 for placing a half-coated pole piece, a second material taking station 302 and a third material taking station 303 for placing a double-coated pole piece.

Specifically, in this embodiment, the cell lamination apparatus 200 further includes a material storage mechanism 250 disposed at the material taking station. The material storage mechanism 250 includes a material box 251, and a material box lifting mechanism (not shown) connected to the material box 251 in a transmission manner and capable of driving the pole pieces in the material box 251 to lift.

The first material taking station 301, the second material taking station 302 and the third material taking station 303 can be provided with the same material storing mechanism 250. The material box 251 is a cavity structure with an opening at one side, and the material box lifting mechanism can be an air cylinder, a motor screw rod assembly and the like. The material box lifting mechanism can drive the material box 251 to lift, and can also directly lift the pole pieces in the material box 251, so that the pole pieces in the material box 251 can lift. By driving the pole pieces to ascend and descend, the uppermost pole piece in the material box 251 can be moved to a set height, so that the carrying mechanism 220 can always grab the pole pieces at the same height, and the debugging cost of the carrying mechanism 220 is reduced.

The pole pieces used for stacking the battery cell comprise a half-coating pole piece and a double-coating pole piece. According to the polarity, the half-coated pole piece and the double-coated pole piece can be divided into a positive pole piece and a negative pole piece. The half-coating pole piece comprises a substrate and an electrode layer formed on one side of the substrate, namely the half-coating pole piece is only provided with the electrode layer on one side. The double-coated electrode sheet refers to a conventional electrode sheet applied to battery manufacturing, and is different from the half-coated electrode sheet 111 in that electrode layers are formed on both sides of a substrate.

Further, the half-coating sheets are oppositely oriented on the first reclaiming station 301 and the second reclaiming station 302. That is, if the electrode layer of the half-coated electrode sheet on the first material taking station 301 faces downward, the electrode layer of the half-coated electrode sheet on the second material taking station 302 faces upward, and vice versa.

The film coating mechanism 230 is used to coat a predetermined length of the diaphragm within the range of the lamination station 210. Thus, a separator may be provided between two adjacent pole pieces.

The flow of the cell processing performed by the cell lamination device 200 is substantially as follows:

the carrying mechanism 220 carries the half-coated sheet with the electrode layer facing upwards from one of the first material taking station 301 and the second material taking station 302 to be placed on the lamination table 210; the film covering mechanism 230 covers a layer of diaphragm on the surface of the semi-coating piece; the handling mechanism 220 handles the double coated sheets from the third pick-up station 303 onto the membrane; the film covering mechanism 230 covers a layer of diaphragm on the surface of the double-coated pole piece; finally, the carrying mechanism 220 carries the half-coated electrode sheet with the electrode layer facing downwards from the other of the first material taking station 301 and the second material taking station 302 to be placed on the surface of the diaphragm, so that the battery cell shown in fig. 1 can be manufactured.

When the multilayer battery cell shown in fig. 2 is prepared, the conveying mechanism 220 may repeatedly carry the double-coated electrode sheet and the film coating mechanism 230 may repeatedly carry out the operation of disposing the separator. When the conveying mechanism 220 conveys the double-coated pole pieces for multiple times, the polarities of the double-coated pole pieces conveyed in two adjacent times are opposite. Therefore, in this case, two third reclaiming stations 303 may be provided for placing the double-coated sheets with different polarities, and the two third reclaiming stations 303 may be located at two sides of the lamination table 210 respectively. Of course, only one third reclaiming station 303 may be provided, and the double-coated sheets with opposite polarities may also be stacked in advance alternately on the same reclaiming station 303.

In this embodiment, the third reclaiming station 303 is located at one side of the lamination table 210, and the first reclaiming station 301 and the second reclaiming station 302 are located at one side of the lamination table 210 opposite to the third reclaiming station 303. The carrying mechanism 220 includes a first carrying mechanism 221 and a second carrying mechanism 222, the first carrying mechanism 221 is used for carrying the pole pieces of the first material taking station 301 and the second material taking station 302 to the lamination table 210, and the second carrying mechanism 220 is used for carrying the pole pieces of the third material taking station 303 to the lamination table 210.

The first conveyance mechanism 221 and the second conveyance mechanism 222 may have the same structure. As shown in fig. 3, the first conveyance mechanism 221 performs a conveyance operation from right to left, and the second conveyance mechanism 222 performs a conveyance operation from left to right. The first handling mechanism 221 is used to handle half-coated sheets, while the second handling mechanism 222 is used to handle double-coated sheets. Moreover, the half-coating sheet and the double-coating sheet are respectively placed on two different sides of the lamination stage 210. Therefore, the carrying actions aiming at the half-coated pole piece and the double-coated pole piece are not interfered with each other, and the efficiency is improved.

In this embodiment, the battery cell stacking device 200 further includes a deviation rectifying mechanism 240, the carrying mechanism 220 is further configured to carry the pole piece placed at the material taking station to the deviation rectifying mechanism 240, and carry the pole piece located at the deviation rectifying mechanism 240 to the stacking table 210 for stacking, and the deviation rectifying mechanism 240 can drive the pole piece to be adjusted to a preset position.

The transport mechanism 220 places the pole pieces on the deflection correcting mechanism 240 before transporting the pole pieces to the lamination station 110. The position information of the pole piece is collected by a CCD (charge coupled device) camera, and the collected position information is compared with a preset ideal position, so that the offset of the pole piece can be obtained. The deviation rectifying mechanism 240 can automatically rectify the position of the pole piece according to the deviation amount. Finally, the pole pieces after being corrected are continuously conveyed to the lamination table 210 by the conveying mechanism 220, so that the precision of cell lamination can be improved.

Specifically, the deviation rectifying mechanism 240 can rectify the deviation by driving the pole piece thereon to move along the X, Y axis and rotate around the Z axis direction. The power assembly driving the X, Y shaft to move may be a motor lead screw nut assembly and the power driving the rotation about the Z axis may be a motor. The two deviation rectifying mechanisms 240 in this embodiment are respectively located at two opposite sides of the lamination table 110 to rectify the deviation of the half-and-half coated pole pieces and the double coated pole pieces.

The film covering mechanism 230 may perform a film covering operation using a diaphragm cut into a sheet shape in advance, or may directly perform film covering using a roll material. In the present embodiment, the film covering mechanism 230 includes a film pulling mechanism 231 and a film cutting mechanism 232.

The film drawing mechanism 231 is used for drawing a preset length of the diaphragm from the feeding roll (not shown) to the range of the lamination station 210. The membrane for laminating is a coil stock and is wound on a material unwinding roll in advance, and the material unwinding roll is installed on an unwinding mechanism. When the film pulling mechanism 231 pulls the diaphragm with the preset length above the lamination table 210, the diaphragm is cut by the film cutting mechanism 232, so that the diaphragm with the preset length just covers the pole piece on the lamination table 210.

Since the film covering mechanism 230 directly covers the film by using the diaphragm of the roll material, cutting is not required in advance, which is helpful for improving efficiency. Meanwhile, waste materials are reduced, and cost can be saved.

Further, in the present embodiment, the film covering mechanism 230 further includes a clamping mechanism 233, and the diaphragm pulled by the film pulling mechanism 231 can pass through the clamping mechanism 233 and be clamped.

Specifically, the clamping mechanism 233 may be a clamping plate forming a gap. When the diaphragm is normally pulled, the width of the crack is larger, so that the diaphragm feeding is not influenced. And before the diaphragm is cut, the slit can be adjusted to clamp the diaphragm. At this time, one side of the diaphragm is fixed by the clamping mechanism 233, and the other side can be pressed and held by the pole piece, so that the diaphragm can keep stable in position, and the cutting mechanism 232 can smoothly perform cutting action.

Referring to fig. 4 and fig. 5, in the present embodiment, the cell lamination apparatus 200 further includes a pressing mechanism 270, the pressing mechanism 270 includes a pressing plate 271, and the pressing mechanism 270 has a pressing state in which the pressing plate 271 is pressed on the surface of the lamination table 210, and an open state in which the pressing plate 271 is retracted from the surface of the lamination table 210.

The pressing plates 271 are distributed on two sides of the lamination table 210, and in this embodiment, two pressing plates 271 are respectively located on two sides of the lamination table 210. The press-fit mechanism 270 is used for preventing the pole pieces from shifting in the stacking process, so that the reliability of the manufactured battery cell is improved. The working process is as follows:

in the initial state, the pressing mechanism 270 is in the open state, so the pressing plate 271 does not block the lamination stage 210; the carrying mechanism 220 places the first pole piece on the lamination table 110, and the pressing mechanism 270 is switched to a pressing state, so that the pressing plate 171 presses the first pole piece; a diaphragm is coated on the surface of the first pole piece, and the carrying mechanism 220 carries the second pole piece to the lamination table 210 and laminates the second pole piece on the surface of the diaphragm; then, the pressing mechanism 270 presses the second pole piece, the diaphragm and the first pole piece together on the lamination table 110 by switching the states; finally, the membrane cutting mechanism 232 cuts the membrane. The above process is repeated to complete the stacking operation of a plurality of pole pieces.

Further, in this embodiment, the cell stacking apparatus 200 further includes a lifting base 260, and the stacking table 210 and the pressing mechanism 270 are mounted on the lifting base 260 and can be driven by the lifting base 260 to lift.

The lifting base 260 can drive the lamination stage 210 to descend by the height of one pole piece after each pole piece is added. Therefore, the uppermost pole piece on the lamination stage 210 can be always at the same height. Thus, the stacking operation is always performed at the same height, which is beneficial to improving the stacking precision. In addition, when laminating, the lamination table 210 and the pressing mechanism 270 may be driven by the lifting base 260 to descend integrally, so as to avoid interference with the laminating mechanism 230.

Referring to fig. 4 again, in the present embodiment, the lifting base 260 includes a first support 261, a first lifting mechanism 262, a second support 263 and a second lifting mechanism 264.

The first support 261 may be a metal plate structure, and the first lifting mechanism 262 is fixed to the first support 261. The first lifting mechanism 262 may be a power element such as a cylinder, a linear motor, etc. The second support 263 may have the same structure as the first support 261, and the second support 263 is slidably disposed on the first support 261 and is in transmission connection with the driving end of the first lifting mechanism 262. The pressing mechanism 270 is mounted on the second support 263. The second lifting mechanism 264 is fixed on the second support 263, and the lamination table 210 is slidably disposed on the second support 263 and is in transmission connection with the driving end of the second lifting mechanism 264.

The second support 263 may be mounted to the first support 261 via a slide rail-and-slide assembly, and the lamination stage 210 may also be mounted to the second support 263 via a slide rail-and-slide assembly. The sliding directions of the second support 263 and the lamination stage 210 are the same, and both are vertical directions as shown in fig. 4. The second elevating mechanism 264 may have the same structure as the first elevating mechanism 262. The first lifting mechanism 262 can drive the second support 263 to lift integrally, and the second lifting mechanism 264 can only drive the lamination table 210 to lift.

Further, in the present embodiment, the pressing mechanism 270 further includes a transverse driving member 272, a connecting plate 273 and a longitudinal driving member 274. Wherein:

the transverse drive member 272 is fixedly arranged and the coupling plate 273 is drivingly connected to the transverse drive member 272. Specifically, the transverse drive member 272 is fixed to the second support 263, and the connecting plate 273 is slidably mounted to the second support 263. The connection plate 273 may also be mounted to the second support 263 by a slide-and-slide assembly. The sliding direction of the connecting plate 273 is perpendicular to the lifting direction of the lifting base 260, i.e., the horizontal direction shown in fig. 4.

The longitudinal driving member 274 is fixed on the connecting plate 273, and the pressing plate 271 is in transmission connection with the longitudinal driving member 274. The longitudinal driver 274 is used to drive the platen 271 in a direction perpendicular to the sliding direction of the connecting plate 273, i.e., the vertical direction as shown in fig. 4. The transverse drive 272 and the longitudinal drive 274 may each be an air cylinder, linear motor, or the like.

When the transverse driving member 272 is actuated, the driving connecting plate 273 is moved transversely, so as to drive the pressing plate 271 to move horizontally and open or close relative to the laminating table 210. The longitudinal driving member 274 will drive the platen 272 up and down to move the platen 271 closer to or farther from the surface of the lamination stage 210. The transverse driving member 272 and the longitudinal driving member 274 are driven to switch the pressing mechanism 270 between the open state and the pressing state.

Further, in this embodiment, the pressing mechanism 270 further includes a buffer 275, and two ends of the buffer 275 are respectively connected to the connecting plate 273 and the pressing plate 271.

Specifically, the buffer 275 may be an air cylinder, a hydraulic rod, a spring, or the like. When the pressing plate 271 is driven by the longitudinal driving member 274 to press and hold the pole piece on the lamination table 210, the buffer 275 can play a role of buffering and absorbing energy, so that the pressing plate 271 is prevented from being in hard contact with the pole piece, and the pole piece is effectively protected.

In the cell lamination device 200, during lamination operation, the half-coated pole pieces may be placed at the first material taking station 301 and the second material taking station 302, and the double-coated pole pieces may be placed at the third material taking station 303. The carrying mechanism 220 carries the half-coated electrode sheet with the electrode layer facing upwards to the lamination table 210 from one of the first material taking station 301 and the second material taking station 302, and then carries the double-coated electrode sheet from the third material taking station 303 to be sequentially stacked on the lamination table 210. Finally, the half-coating pole piece with the electrode layer facing downwards is conveyed from the other of the first material taking station 301 and the second material taking station 302. Therefore, the battery cell with two half-coated pole pieces at the outermost layer can be obtained.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides an electric core, its characterized in that, including a plurality of pole pieces of range upon range of setting and centre gripping in adjacent two the diaphragm between the pole piece, and adjacent two the polarity of pole piece is opposite, the pole piece is including being located the outmost two half pole pieces of scribbling of electric core, half pole piece including the substrate and formed at the substrate orientation the electrode layer of the middle part one side of electric core.

2. The cell of claim 1, wherein the pole pieces further comprise a first double-coated pole piece positioned between two of the half-coated pole pieces.

3. The cell of claim 1, wherein the pole pieces further comprise a second double-coated pole piece and a third double-coated pole piece positioned between the two half-coated pole pieces, wherein the second double-coated pole piece and the third double-coated pole piece are opposite in polarity and are stacked alternately.

4. The utility model provides an electricity core lamination device is equipped with and piles up the station and get the material station, its characterized in that, electricity core lamination device includes:

the lamination table is arranged at the stacking station;

5. The cell lamination device according to claim 4, wherein the third reclaiming station is located on one side of the lamination table, the first reclaiming station and the second reclaiming station are located on the opposite side of the lamination table from the third reclaiming station, and the carrying mechanism includes a first carrying mechanism and a second carrying mechanism, the first carrying mechanism is configured to carry the pole pieces of the first reclaiming station and the second reclaiming station to the lamination table, and the second carrying mechanism is configured to carry the pole pieces of the third reclaiming station to the lamination table.

6. The cell lamination device according to claim 4, wherein the lamination mechanism comprises:

7. The cell lamination device according to claim 6, wherein the film covering mechanism further comprises a clamping mechanism, and the membrane drawn by the film drawing mechanism can pass through the clamping mechanism and be clamped.

8. The cell lamination device according to claim 4, further comprising a deviation correction mechanism, wherein the carrying mechanism is further configured to carry the pole piece placed at the material taking station to the deviation correction mechanism, and carry the pole piece located at the deviation correction mechanism to the lamination table for stacking, and the deviation correction mechanism can drive the pole piece to be adjusted to a preset orientation.

9. The battery cell lamination device according to claim 4, further comprising a material storage mechanism disposed at the material taking station, wherein the material storage mechanism comprises a material box and a material box lifting mechanism in transmission connection with the material box and capable of driving the pole pieces in the material box to lift.

10. The cell lamination device according to any one of claims 4 to 9, further comprising a pressing mechanism, wherein the pressing mechanism includes a pressing plate, and the pressing mechanism has a pressing state in which the pressing plate is pressed against the surface of the lamination table and an open state in which the pressing plate yields the surface of the lamination table.

11. The cell lamination device according to claim 10, further comprising a lifting base, wherein the lamination table and the pressing mechanism are mounted on the lifting base and can be driven by the lifting base to lift.

12. The cell lamination apparatus of claim 11, wherein the lifting base comprises:

a first support;

the first lifting mechanism is fixed on the first support;

13. The cell lamination device according to claim 10, wherein the pressing mechanism further includes a transverse driving member fixedly disposed, a connecting plate drivingly connected to the transverse driving member, and a longitudinal driving member fixed to the connecting plate, and the pressing plate is drivingly connected to the longitudinal driving member.

14. The cell lamination device according to claim 13, wherein the pressing mechanism further includes a buffer member, and two ends of the buffer member are respectively connected to the connection plate and the pressing plate.