CN114267884A - Lamination device, battery cell folding process and lamination battery cell - Google Patents
Lamination device, battery cell folding process and lamination battery cell Download PDFInfo
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- CN114267884A CN114267884A CN202111611700.0A CN202111611700A CN114267884A CN 114267884 A CN114267884 A CN 114267884A CN 202111611700 A CN202111611700 A CN 202111611700A CN 114267884 A CN114267884 A CN 114267884A
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- folding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a lamination device, a cell folding process and a lamination cell, and relates to the technical field of cell production. The lamination device includes a first folding mechanism having a plurality of first folding bars and a second folding mechanism having a plurality of second folding bars. The first folding mechanism and the second folding mechanism can respectively drive the first folding rods and the second folding rods to clamp the composite pole piece belt located in the folding space, and the plurality of first folding rods and the plurality of second folding rods are alternately arranged in the folding space at intervals. The multiple first folding rods and the multiple first folding rods can be simultaneously and respectively driven to be drawn close to be arranged into two rows at intervals in parallel so as to fold the composite pole piece belt and form a laminated cell between the first folding rods and the second folding rods. The laminated battery cell is formed by folding the laminating device, and the laminating device and the battery cell folding process have the characteristics of higher folding efficiency and higher yield of the produced laminated battery cell.
Description
Technical Field
The invention relates to the technical field of battery cell production, in particular to a lamination device, a battery cell folding process and a lamination battery cell.
Background
Lithium ion, as a secondary battery, is widely used in the fields of electronic devices, new energy vehicles, and energy storage by virtue of its excellent performance. The fabrication of cells within a lithium battery is particularly important in the manufacturing process of lithium batteries. There are two general methods of cell fabrication, winding and lamination, respectively. Winding, namely winding the die-cut positive and negative pole pieces and the isolating film on a winding core for a fixed length, and taking out the wound battery cell by using a winding needle to form a battery cell; the lamination means that the positive and negative pole pieces which are subjected to die cutting and cutting are sequentially and alternately stacked on the isolating membrane to finally form a square battery cell.
The traditional lamination process has high folding frequency, and the situation of dislocation between the isolating membrane and the positive and negative pole pieces is easy to occur, so that the yield of the battery cell is low; and because folding number of times is more, the time spent is longer, and electric core production efficiency is also lower.
In view of this, it is very important to develop a lamination device, a cell folding process and a lamination cell that can solve the above technical problems.
Disclosure of Invention
The invention aims to provide a lamination device and a battery cell folding process, which have the characteristics of higher folding efficiency and higher yield of the produced laminated battery cell. Another object of the present invention is to provide a laminated battery cell, which is formed by folding using the above-mentioned lamination device or battery cell folding process.
The invention provides a technical scheme that:
in a first aspect, embodiments of the present invention provide a lamination device, which includes a first folding mechanism having a plurality of first folding bars and a second folding mechanism having a plurality of second folding bars;
a folding space for accommodating a composite pole piece belt is arranged between the first folding mechanism and the second folding mechanism, wherein the composite pole piece belt comprises an isolation film and a plurality of positive pole pieces and a plurality of negative pole pieces which are alternately compounded on two side surfaces of the isolation film at intervals;
the first folding mechanism and the second folding mechanism can respectively drive the first folding rods and the second folding rods to clamp the composite pole piece belts positioned in the folding space, and a plurality of first folding rods and a plurality of second folding rods are alternately arranged in the folding space at intervals; can also drive simultaneously respectively many first folding rod and many first folding rod draws close to arrange into two rows of parallel interval in order to fold compound pole piece area to form the lamination electric core in first folding rod with between the second folding rod.
With reference to the first aspect, in another implementation manner of the first aspect, the lamination device further includes a clamping mechanism, and the clamping mechanism can clamp two ends of the composite pole piece belt in a first direction when the first folding rods and the second folding rods are respectively arranged in two rows, where the first direction is a direction in which the plurality of first folding rods are arranged;
the first folding mechanism and the second folding mechanism can also drive the first folding rod and the second folding rod to exit from the folding space so as to draw out the laminated battery cell.
With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the clamping mechanism includes a clamping driving member, and a first clamping member and a second clamping member that are connected to the clamping driving member, where the clamping driving member can drive the first clamping member and the second clamping member to move closer together to clamp the laminated battery cell, and the first clamping member and the second clamping member clamp the part of the laminated battery cell is located between the first folding rod and the second folding rod.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the first folding mechanism further includes a first folding panel, and one side of the first folding panel corresponds to the folding space;
a first folding strip hole is formed in the first folding panel and extends along a first direction, wherein the first direction is the extending direction of the composite pole piece strip located in the folding space;
the plurality of first folding rods correspond to the first folding strip holes and are lifted into the folding space through the first folding strip holes; the first folding mechanism drives the plurality of first folding rods to be drawn together and arranged, and the first folding rods are drawn together along the first folding strip holes.
With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the second folding mechanism further includes a second folding panel, the first folding panel and the second folding panel are arranged in parallel and at an interval, and an interval between the first folding panel and the second folding panel is the folding space;
a plurality of second folding strip holes are formed in the second folding panel, two ends of each of the second folding strip holes are arranged in a high-low mode, the interval between the top ends of the second folding strip holes is larger than the interval between the bottom ends of the second folding strip holes, and the top ends and the bottom ends of the second folding strip holes are arranged in two parallel rows;
the plurality of second folding rods are respectively in one-to-one correspondence with the plurality of second folding strip holes and extend into the folding space through the top ends of the corresponding second folding strip holes; when the second folding mechanism drives the plurality of second folding rods to be drawn close and arranged, the second folding rods move along the corresponding second folding strip holes and move from the top ends to the bottom ends of the second folding strip holes, so that the second folding rods are drawn close and arranged.
With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the plurality of first folding rods and the plurality of second folding rods are respectively arranged at two sides of the folding space, and the first folding rods and the second folding rods are arranged in a staggered manner and located in the same plane so as to simultaneously correspond to the adjacent positive pole pieces and the adjacent negative pole pieces on the composite pole piece strip.
In a second aspect, an embodiment of the present invention further provides a cell folding process, which is applied to the lamination device; the cell folding process comprises the following steps:
the first folding mechanism and the second folding mechanism respectively drive the first folding rods and the second folding rods to clamp the composite pole piece belts in the folding space, so that the first folding rods and the second folding rods are alternately arranged in the folding space at intervals, and the isolating films corresponding to the intervals between the positive pole pieces and the negative pole pieces are clamped;
through first folding mechanism with second folding mechanism drives many respectively simultaneously first folding rod and many first folding rod draws close to arrange into two rows of parallel spaced, with folding compound pole piece area, and form the lamination electric core in first folding rod with between the second folding rod.
With reference to the second aspect, in a first implementation manner of the second aspect, the step of folding the composite pole piece strip further includes: first folding mechanism drives many first folding rod draws close along the first direction, simultaneously, second folding mechanism drives many second folding rod draws close and keeps away from many first folding mechanism moves, in order to arrange many first folding rod and many first folding rod is two rows of parallel spaced, wherein, first direction does first folding rod centre gripping during compound pole piece area, the extending direction in compound pole piece area.
With reference to the second aspect and the foregoing implementation manner of the second aspect, in a second implementation manner of the second aspect, before the step of clamping the composite pole piece strip, the cell folding process further includes:
compounding a plurality of positive plates and a plurality of negative plates on the isolating film, wherein the negative plates and the positive plates are arranged in a staggered manner and are respectively positioned on two side surfaces of the isolating film to form a compound plate belt;
and drawing the composite pole piece to the folding space.
In a third aspect, an embodiment of the present invention further provides a laminated battery cell, which is formed by folding the lamination device or by using the battery cell folding process.
Compared with the prior art, the lamination device provided by the embodiment of the invention has the beneficial effects that compared with the prior art, the lamination device provided by the embodiment of the invention comprises the following components:
the lamination device comprises a first folding mechanism and a second folding mechanism, wherein the first folding mechanism is provided with a plurality of first folding rods, the second folding mechanism is provided with a plurality of second folding rods, a folding space is arranged between the first folding mechanism and the second folding mechanism and used for accommodating a composite pole piece belt, the composite pole piece belt comprises an isolation film, a plurality of positive plates and a plurality of negative plates, the positive plates and the negative plates are alternately compounded on two side surfaces of the isolation film at intervals, in other words, the positive plates and the negative plates are respectively positioned on two side surfaces of the isolation film, and staggered arrangement is arranged between every two adjacent pole pieces to form intervals, so that the positive plates and the negative plates are alternately arranged after being folded and are separated by the isolation film. The first folding mechanism and the second folding mechanism can respectively drive the first folding rod and the second folding rod to clamp the composite pole piece belt positioned in the folding space, and enable the plurality of first folding rods and the plurality of second folding rods to be alternately arranged in the folding space at intervals, or the first folding rod and the second folding rod to clamp different positions on the composite pole piece belt, and during clamping, the first folding rods and the second folding rods are alternately arranged, and intervals are arranged between every two adjacent folding rods, the first folding mechanism and the second folding mechanism can also simultaneously drive the plurality of first folding rods and the plurality of first folding rods to be close together and arranged into two rows at parallel intervals so as to fold the composite pole piece belt and form a laminated cell between the first folding rods and the second folding rods, in other words, when the composite pole piece belt is clamped, a positive pole piece or a negative pole piece is arranged between the adjacent first folding rods and the adjacent second folding rods, and, a second folding rod has before two adjacent first folding rods, so, when many first folding rods and many first folding rods are two rows respectively and draw close, positive plate or negative plate between the common drive of adjacent first folding rod and second folding rod deflect, when many first folding rods and many first folding rods draw close respectively and are two rows, make the barrier film be the broken line type, and positive plate and negative plate parallel arrangement on it, thereby form the lamination electric core between first folding rod and second folding rod, it accomplishes the folding of compound pole piece area different positions simultaneously, the number of folding times is less, the difficult condition that misplaces appears, the yields of the lamination electric core of product is higher, and folding efficiency is higher.
The beneficial effects of the lamination process and the lamination cell provided by the embodiment of the invention relative to the prior art are the same as the beneficial effects of the lamination device relative to the prior art, and are not described again.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.
Fig. 1 is a schematic structural diagram of a lamination device according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a composite pole piece strip folded by a lamination device according to a first embodiment of the present invention.
Fig. 3 is a schematic structural view illustrating the first folding bar and the second folding bar of the lamination device clamping the composite pole piece strip according to the first embodiment of the present invention.
Fig. 4 is a schematic structural view of a first folding panel of the laminating device according to the first embodiment of the present invention.
Fig. 5 is a schematic structural view of a second folding panel of the laminating device according to the first embodiment of the present invention.
Fig. 6 is a schematic view of a partially cut-away structure of the lamination device after being folded to form a laminated cell according to the first embodiment of the present invention.
Fig. 7 is an enlarged view of a portion of the structure at I in fig. 6.
Fig. 8 is a schematic flow chart of a cell folding process according to a second embodiment of the present invention.
Icon: 10-a lamination device; 11-a first folding mechanism; 111-a first folding bar; 110-a folding space; 112-a first folding panel; 1121-first folded strip aperture; 12-a second folding mechanism; 121-a second folding bar; 122-a second folding panel; 1221-second folded strip aperture; 13-a clamping mechanism; 130-a clamp drive; 131-a first clamp; 1311-a holding portion; 132-a second clamp; 800-composite pole piece tape; 801-isolation film; 802-positive plate; 803-negative plate; 900-laminated cell.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. The terms "upper", "lower", "inner", "outer", "left", "right", and the like, refer to an orientation or positional relationship as shown in the drawings, or as would be conventionally found in use of the inventive product, or as would be conventionally understood by one skilled in the art, and are used merely to facilitate the description and simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the present invention. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It is also to be understood that, unless expressly stated or limited otherwise, the terms "disposed," "connected," and the like are intended to be open-ended, and mean "connected," i.e., fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment:
the following detailed description of embodiments of the invention refers to the accompanying drawings.
Referring to fig. 1, a lamination device 10 according to a first embodiment of the present invention has a high folding efficiency and a high yield of a laminated battery cell 900. The lamination device 10 can be applied to a cell production system and other scenarios, and of course, the lamination device 10 can also be used independently.
The structural composition, operation and advantages of the lamination device 10 according to the first embodiment of the present invention will be described in detail below.
With continuing reference to fig. 1, and with further reference to fig. 2-7, the lamination device 10 includes a first folding mechanism 11 and a second folding mechanism 12, the first folding mechanism 11 having a plurality of first folding bars 111, the second folding mechanism 12 having a plurality of second folding bars 121, and a folding space 110 is provided between the first folding mechanism 11 and the second folding mechanism 12, and is used for accommodating the composite pole piece strip 800, wherein the composite electrode sheet strip 800 comprises an isolation film 801, a plurality of positive electrode sheets 802 and a plurality of negative electrode sheets 803, wherein, a plurality of positive plates 802 and a plurality of negative plates 803 are alternately compounded on two side surfaces of the isolation film 801 at intervals, in other words, the positive plates 802 and the negative plates 803 are respectively positioned on two side surfaces of the isolation film 801, and the adjacent two pole pieces are staggered and connected with an interval, after being folded, the positive electrode sheets 802 and the negative electrode sheets 803 are alternately arranged and separated by the separation film 801. The first folding mechanism 11 and the second folding mechanism 12 can respectively drive the first folding rod 111 and the second folding rod 121 to clamp the composite electrode sheet strip 800 located in the folding space 110, and enable the plurality of first folding rods 111 and the plurality of second folding rods 121 to be alternately arranged in the folding space 110 at intervals, or the first folding rod 111 and the second folding rod 121 to clamp different positions on the composite electrode sheet strip 800, and during clamping, the first folding rod 111 and the second folding rod 121 are alternately arranged, and a gap is provided between two adjacent folding rods, the first folding mechanism 11 and the second folding mechanism 12 can also simultaneously respectively drive the plurality of first folding rods 111 and the plurality of first folding rods 111 to be close together and arranged into two parallel spaced rows to fold the composite electrode sheet strip 800, and form the laminated cell 900 between the first folding rod 111 and the second folding rod 121, in other words, when clamping the composite electrode sheet strip 800, a positive plate 802 or a negative plate 803 is arranged between the adjacent first folding rod 111 and the second folding rod 121, and a second folding rod 121 is arranged in front of the adjacent two first folding rods 111, so that when the first folding rods 111 and the first folding rods 111 are respectively closed in two rows, the adjacent first folding rods 111 and the second folding rods 121 jointly drive the positive plate 802 or the negative plate 803 between the adjacent first folding rods 111 and the second folding rods 121 to deflect, so that when the first folding rods 111 and the first folding rods 111 are respectively closed in two rows, the isolating film 801 is in a folded line shape, and the positive plates 802 and the negative plates 803 thereon are arranged in parallel, thereby forming the laminated cell 900 between the first folding rods 111 and the second folding rods 121, simultaneously completing the folding of the composite plate strip 800 at different positions, having fewer folding times, being not easy to have dislocation, and having higher yield of the produced cell 900, and the folding efficiency is higher.
It should be noted that, the first folding mechanism 11 and the second folding mechanism 12 are both provided with a moving mechanism (not shown) for driving the corresponding folding rods to move, and each folding rod corresponds to an individual moving mechanism, or an integral moving mechanism is used, so as to achieve the purpose of driving the corresponding folding rod to move.
Further, the lamination device 10 may further include a clamping mechanism 13, where the clamping mechanism 13 is capable of clamping both ends of the composite electrode sheet strip 800 in a first direction when the first folding bars 111 and the second folding bars 121 are respectively arranged in two rows in a closed manner, that is, when the laminated cell 900 is formed by folding, as shown in fig. 6 and 7, so as to maintain the shape of the laminated cell 900, where the first direction (not shown) is a direction in which the plurality of first folding bars 111 are arranged, that is, an extending direction of the composite electrode sheet strip 800 located in the folding space 110. In addition, the first folding mechanism 11 and the second folding mechanism 12 can also respectively drive the plurality of first folding rods 111 and the plurality of second folding rods 121 to exit the folding space 110, so as to draw out the laminated battery cell 900, so as to facilitate the folding of the next laminated battery cell 900.
It should be noted that the clamping mechanism 13 may include a clamping driving member 130, and a first clamping member 131 and a second clamping member 132 connected to the clamping driving member 130, where the clamping driving member 130 may drive the first clamping member 131 and the second clamping member 132 to move closer to clamp the laminated cell 900, and when clamping the laminated cell 900, a portion of the laminated cell 900 clamped by the first clamping member 131 and the second clamping member 132 is located between the first folding rod 111 and the second folding rod 121, in other words, a portion of the laminated cell 900 clamped by the first clamping member 131 and the second clamping member 132 has a narrower width, so as to reduce stress on upper and lower ends of the laminated cell 900 during clamping, and facilitate the first folding rod 111 and the second folding rod 121 to pull out the laminated cell 900.
In addition, the first clamping member 131 and the second clamping member 132 may further be respectively provided with a protruding portion 1311, a distal end of the protruding portion 1311 is used for clamping the laminated cell 900, and in a direction perpendicular to the first direction, a width of the protruding portion 1311 is smaller than a width of the laminated cell 900, and a distal end of the protruding portion 1311 may further be provided with a flexible clamping pad (not shown), so as to reduce an influence of a clamping action on a shape of the laminated cell 900 and avoid puncturing the isolation film 801.
With reference to fig. 4, the first folding mechanism 11 further includes a first folding panel 112, wherein a side of the first folding panel 112 corresponds to the folding space 110, so that the position of the composite electrode sheet strip 800 in the folding space 110 in the direction perpendicular to the first direction is limited by the side of the first folding panel 112 corresponding to the folding space 110, and the precision of clamping the folded composite electrode sheet strip 800 is improved, and the first folding strip hole 1121 is formed in the first folding panel 112, the first folding strip hole 1121 extends in the first direction, and the plurality of first folding rods 111 correspond to the first folding strip hole 1121, and are lifted into the folding space 110 through the first folding strip hole 1121; when the first folding mechanism 11 drives the plurality of first folding rods 111 to be arranged close to each other, the first folding rods 111 are close to each other along the first folding strip holes 1121, in other words, when the composite pole piece strip 800 is folded, the movement path of the first folding rods 111 is a straight line, as shown in fig. 4, the control is simple, and the design and manufacturing are convenient.
With continued reference to fig. 5, further, the second folding mechanism 12 may further include a second folding panel 122, the first folding panel 112 and the second folding panel 122 are disposed in parallel and spaced apart, and the spacing between the first folding panel 112 and the second folding panel 122 is the folding space 110, so as to further limit the position of the composite pole piece strip 800 in the folding space 110 through the side of the second folding panel 122 facing the folding space 110. A plurality of second folding holes 1221 have been seted up on the second folding panel 122, and the equal high one low setting in both ends of each of a plurality of second folding holes 1221, interval between the top of each of a plurality of second folding holes 1221 is greater than the interval between the bottom of each of a plurality of second folding holes 1221, and two rows of parallel arrangements of top and bottom of each of a plurality of second folding holes 1221 are arranged respectively, and a plurality of second folding rods 121 are corresponding to a plurality of second folding holes 1221 one-to-one, and the top of the corresponding second folding holes 1221 stretches into the folding space 110. And, when the second folding mechanism 12 drives a plurality of second folding rods 121 to be drawn together and arranged, the second folding rods 121 move along the corresponding second folding strip holes 1221, and move from the top ends of the second folding strip holes 1221 to the bottom ends, so as to be drawn together and arranged, in other words, in the process of transverse movement of the first folding rods 111, the second folding rods 121 move downwards in an inclined manner, and are arranged below the first folding rods 111, so as to cooperate with the first folding rods 111 to complete the work of folding the composite pole piece strip 800, and the control is simple, and the design and manufacture are facilitated.
It should be noted that, in other embodiments, when the composite pole piece strip 800 is folded, the first folding rod 111 and the second folding rod 121 may also be simultaneously away from the position where the composite pole piece strip 800 is clamped, and gradually close to each other to form two rows, so as to fold the composite pole piece strip 800, and further improve the folding efficiency.
In addition, the plurality of first folding rods 111 and the plurality of second folding rods 121 may be respectively arranged at both sides of the folding space 110, and the first folding rods 111 and the second folding rods 121 are staggered and located in the same plane to respectively correspond to the interval between the adjacent positive electrode tab 802 and the negative electrode tab 803 on the composite electrode tab strip 800 at the same time, so that the plurality of first folding rods 111 and the plurality of second folding rods 121 may extend into the folding space 110 in a direction perpendicular to the extending direction of the composite electrode tab strip 800 before clamping the composite electrode tab strip 800, thereby further improving the folding efficiency.
Second embodiment:
referring to fig. 8, fig. 8 is a schematic flow chart of a cell folding process according to a second embodiment of the present invention.
A second embodiment of the present invention provides a cell folding process, which is applied to the lamination device 10 provided in the above embodiments, and has the characteristics of high folding efficiency and high yield of the finished lamination cell 900. The basic principle and the technical effects thereof are the same as those of the above embodiments, and for the sake of brief description, no part of this embodiment is mentioned, and reference may be made to the corresponding contents in the above embodiments.
The battery cell folding process comprises the following steps:
step S100: the first folding mechanism 11 and the second folding mechanism 12 respectively drive the first folding rod 111 and the second folding rod 121 to clamp the composite pole piece strip 800 located in the folding space 110, so that the plurality of first folding rods 111 and the plurality of second folding rods 121 are alternately arranged in the folding space 110 at intervals, and clamp the separation film 801 corresponding to the intervals between the positive pole pieces 802 and the negative pole pieces 803.
Step S200: the first folding mechanism 11 and the second folding mechanism 12 simultaneously drive the plurality of first folding rods 111 and the plurality of first folding rods 111 to be close together and arranged into two rows spaced in parallel, so as to fold the composite electrode sheet strip 800, and form a laminated battery cell 900 between the first folding rods 111 and the second folding rods 121.
Thereby when folding, in order to draw close respectively at many first folding rods 111 and be two rows of times, make positive plate 802 or negative pole piece 803 between adjacent first folding rod 111 and the common drive of second folding rod 121 deflect, and make barrier film 801 be the broken line type, thereby forming lamination electricity core 900 between first folding rod 111 and second folding rod 121, it accomplishes the folding of the different position pole pieces of compound pole piece area 800 simultaneously, and folding number of times is less, the condition of dislocation is difficult to appear, the yields of the lamination electricity core 900 of output article is higher, and folding efficiency is higher.
Further, step S200 further includes: first folding mechanism 11 drives many first folding rods 111 and draws close along the first direction, and simultaneously, second folding mechanism 12 drives many second folding rods 121 and draws close and keep away from many first folding mechanism 11 motion to arrange many first folding rods 111 and be two rows of parallel interval. In the folding process, the first folding rod 111 moves transversely, and the second folding rod 121 moves obliquely downwards and is arranged below the first folding rod 111, so that the work of folding the composite pole piece belt 800 is completed, the control is simple, and the design and the manufacture are convenient.
In addition, before step S100, the cell folding process may further include: the positive electrode plates 802 and the negative electrode plates 803 are combined on the isolation film 801, the negative electrode plates 803 and the positive electrode plates 802 are arranged in a staggered mode and are respectively located on two side faces of the isolation film 801, so that a combined electrode plate strip 800 is formed, and after the combined electrode plates are formed, the combined electrode plate strip 800 is drawn to the folding space 110 to be folded by a folding device.
The embodiment of the invention also provides a laminated battery cell 900, which is folded by adopting the battery cell folding process or the laminating device 10, and can simultaneously complete the folding of the composite pole piece strip 800 at different positions, so that the folding times are less, the folding efficiency is higher, and the yield of the produced laminated battery cell 900 is higher.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that the features in the above embodiments may be combined with each other and the present invention may be variously modified and changed without conflict. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Also, the embodiments should be considered as exemplary and non-limiting.
Claims (10)
1. A lamination device, characterized by comprising a first folding means (11) having a plurality of first folding bars (111) and a second folding means (12) having a plurality of second folding bars (121);
a folding space (110) for accommodating a composite pole piece strip (800) is formed between the first folding mechanism (11) and the second folding mechanism (12), wherein the composite pole piece strip (800) comprises an isolation film (801) and a plurality of positive pole pieces (802) and a plurality of negative pole pieces (803) which are alternately compounded on two side faces of the isolation film (801) at intervals;
the first folding mechanism (11) and the second folding mechanism (12) can respectively drive the first folding rod (111) and the second folding rod (121) to clamp the composite pole piece strip (800) located in the folding space (110), and the first folding rods (111) and the second folding rods (121) are alternately arranged in the folding space (110) at intervals; can also drive simultaneously respectively many first folding rod (111) and many first folding rod (111) are drawn close and are arranged into two rows of parallel spaced, in order to fold compound pole piece area (800) to form lamination electricity core (900) in first folding rod (111) with between the second folding rod (121).
2. The lamination device according to claim 1, further comprising a clamping mechanism (13), wherein the clamping mechanism (13) can clamp two ends of the composite pole piece strip (800) in a first direction when the first folding bar (111) and the second folding bar (121) are respectively arranged in two rows, wherein the first direction is a direction in which a plurality of the first folding bars (111) are arranged;
first folding mechanism (11) with second folding mechanism (12) can also drive many respectively first folding rod (111) and many second folding rod (121) withdraw from folding space (110) in order to take out lamination electricity core (900).
3. The lamination device according to claim 2, wherein the clamping mechanism (13) includes a clamping driving member (130) and a first clamping member (131) and a second clamping member (132) connected to the clamping driving member (130), the clamping driving member (130) can drive the first clamping member (131) and the second clamping member (132) to move closer together to clamp the lamination cell (900), and when the lamination cell (900) is clamped, a portion of the lamination cell (900) clamped by the first clamping member (131) and the second clamping member (132) is located between the first folding rod (111) and the second folding rod (121).
4. The lamination device according to claim 1, wherein the first folding mechanism (11) further comprises a first folding panel (112), a side of the first folding panel (112) corresponding to the folding space (110);
a first folding strip hole (1121) is formed in the first folding panel (112), and the first folding strip hole (1121) extends along a first direction, wherein the first direction is the extending direction of the composite pole piece strip (800) located in the folding space (110);
the plurality of first folding rods (111) correspond to the first folding bar holes (1121) and are lifted into the folding space (110) through the first folding bar holes (1121); the first folding mechanism (11) drives the first folding rods (111) to be close to arrange, and the first folding rods (111) are close to the first folding strip holes (1121).
5. The lamination device according to claim 4, wherein the second folding mechanism (12) further comprises a second folding panel (122), the first folding panel (112) and the second folding panel (122) being disposed in parallel spaced relation, and the spacing between the first folding panel (112) and the second folding panel (122) being the folding space (110);
a plurality of second folding strip holes (1221) are formed in the second folding panel (122), two ends of each second folding strip hole (1221) are arranged in a high-low mode, the interval between the top ends of each second folding strip hole (1221) is larger than the interval between the bottom ends of each second folding strip hole (1221), and the top ends and the bottom ends of each second folding strip hole (1221) are arranged in two parallel rows;
the second folding rods (121) are respectively in one-to-one correspondence with the second folding strip holes (1221), and extend into the folding space (110) through the top ends of the corresponding second folding strip holes (1221); when the second folding mechanism (12) drives the plurality of second folding rods (121) to be drawn together and arranged, the second folding rods (121) move along the corresponding second folding strip holes (1221), and the top ends of the second folding strip holes (1221) move to the bottom ends, so that the second folding rods (121) are drawn together and arranged.
6. The lamination device according to claim 1, wherein a plurality of the first folding bars (111) and a plurality of the second folding bars (121) are respectively arranged at two sides of the folding space (110), and the first folding bars (111) and the second folding bars (121) are arranged in a staggered manner and located in the same plane so as to respectively correspond to the intervals between the adjacent positive electrode sheets (802) and the adjacent negative electrode sheets (803) on the composite electrode sheet strip (800) at the same time.
7. A cell folding process, characterized by being applied to a lamination device according to any one of claims 1 to 6; the cell folding process comprises the following steps:
the first folding mechanism (11) and the second folding mechanism (12) respectively drive the first folding rod (111) and the second folding rod (121) to clamp the composite pole piece strip (800) located in the folding space (110), a plurality of first folding rods (111) and a plurality of second folding rods (121) are alternately arranged in the folding space (110) at intervals, and the separation films (801) corresponding to the intervals between the positive pole pieces (802) and the negative pole pieces (803) are clamped;
through first folding mechanism (11) with second folding mechanism (12) drive many respectively simultaneously first folding rod (111) and many first folding rod (111) are drawn close and are arranged into two rows of parallel intervals, in order to fold compound pole piece area (800), and form lamination electricity core (900) in first folding rod (111) with between second folding rod (121).
8. The cell folding process according to claim 7, wherein the step of folding the composite pole piece tape (800) further comprises:
first folding mechanism (11) drive many first folding rod (111) are drawn close along the first direction, simultaneously, second folding mechanism (12) drive many second folding rod (121) are drawn close and are kept away from many first folding mechanism (11) motion is many in order to arrange first folding rod (111) and many first folding rod (111) are two rows of parallel spaced, wherein, first direction does first folding rod (111) centre gripping during compound utmost point piece area (800), the extending direction in compound utmost point piece area (800).
9. The cell folding process according to claim 7, characterized in that, prior to the step of clamping the composite pole piece tape (800), the cell folding process further comprises:
compounding a plurality of positive electrode sheets (802) and a plurality of negative electrode sheets (803) on the isolation film (801), wherein the negative electrode sheets (803) and the positive electrode sheets (802) are arranged in a staggered mode and are respectively positioned on two side faces of the isolation film (801) to form a compound electrode sheet belt (800);
-pulling the composite pole piece strip (800) to the folding space (110).
10. A laminated cell, characterised in that it is folded using a lamination arrangement according to any one of claims 1 to 6, or using a cell folding process according to any one of claims 7 to 9.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003243270A (en) * | 2002-02-21 | 2003-08-29 | Hitachi Aic Inc | Bending mechanism for electronic component element |
| JP2006190531A (en) * | 2005-01-05 | 2006-07-20 | Nec Tokin Corp | Manufacturing method of electrode for battery |
| US20090165936A1 (en) * | 2007-12-06 | 2009-07-02 | Eliily Power Co., Ltd. | Method and apparatus for manufacturing electrode assembly for rectangular battery |
| JP2012033275A (en) * | 2010-07-28 | 2012-02-16 | Aisin Seiki Co Ltd | Manufacturing method for cell laminate, manufacturing apparatus for the same and cell laminate |
| WO2015162698A1 (en) * | 2014-04-22 | 2015-10-29 | エリーパワー株式会社 | Secondary-battery production method and production device |
| US20190229360A1 (en) * | 2018-01-22 | 2019-07-25 | Volkswagen Aktiengesellschaft | Method for producing an electrode stack for energy stores, and stacking system |
| CN111786029A (en) * | 2020-07-30 | 2020-10-16 | 深圳吉阳智能科技有限公司 | Pole piece forming device and battery core production system |
| CN112151880A (en) * | 2020-10-13 | 2020-12-29 | 苏州金丝港智能发展股份有限公司 | Lithium battery cell lamination device and use method thereof |
-
2021
- 2021-12-27 CN CN202111611700.0A patent/CN114267884A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003243270A (en) * | 2002-02-21 | 2003-08-29 | Hitachi Aic Inc | Bending mechanism for electronic component element |
| JP2006190531A (en) * | 2005-01-05 | 2006-07-20 | Nec Tokin Corp | Manufacturing method of electrode for battery |
| US20090165936A1 (en) * | 2007-12-06 | 2009-07-02 | Eliily Power Co., Ltd. | Method and apparatus for manufacturing electrode assembly for rectangular battery |
| JP2012033275A (en) * | 2010-07-28 | 2012-02-16 | Aisin Seiki Co Ltd | Manufacturing method for cell laminate, manufacturing apparatus for the same and cell laminate |
| WO2015162698A1 (en) * | 2014-04-22 | 2015-10-29 | エリーパワー株式会社 | Secondary-battery production method and production device |
| US20190229360A1 (en) * | 2018-01-22 | 2019-07-25 | Volkswagen Aktiengesellschaft | Method for producing an electrode stack for energy stores, and stacking system |
| CN111786029A (en) * | 2020-07-30 | 2020-10-16 | 深圳吉阳智能科技有限公司 | Pole piece forming device and battery core production system |
| CN112151880A (en) * | 2020-10-13 | 2020-12-29 | 苏州金丝港智能发展股份有限公司 | Lithium battery cell lamination device and use method thereof |
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