CN114284569A - Blanking assembly, battery cell blanking method and winding device - Google Patents
Blanking assembly, battery cell blanking method and winding device Download PDFInfo
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- CN114284569A CN114284569A CN202111611381.3A CN202111611381A CN114284569A CN 114284569 A CN114284569 A CN 114284569A CN 202111611381 A CN202111611381 A CN 202111611381A CN 114284569 A CN114284569 A CN 114284569A
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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
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- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a blanking assembly, a battery cell blanking method and a winding device, and relates to the technical field of battery cell production. The blanking assembly comprises two first clamping mechanisms and two second clamping mechanisms, wherein the two first clamping mechanisms and the two second blanking mechanisms are alternately arranged in a surrounding mode. First fixture and second fixture can insert the electric core on the book needle simultaneously, and the electric core is taken off in common centre gripping. The two first clamping mechanisms can also be far away from each other along a first straight line, so that the cross section of the battery cell is polygonal. The two second clamping mechanisms can also move along a second straight line perpendicular to the first straight line and the axis of the battery cell and move to the first straight line, and meanwhile, the two first clamping mechanisms are mutually far away from the first straight line, so that the cross section of the battery cell is waist-shaped. The blanking assembly, the battery cell blanking method and the winding device have the characteristics of stable blanking and small influence on the alignment degree of the battery cell in the blanking process.
Description
Technical Field
The invention relates to the technical field of battery cell production, in particular to a blanking assembly, a battery cell blanking method and a winding device.
Background
The winding is an essential process in the production and manufacturing process of the lithium ion battery and is also particularly important. The winding is to roll the pole piece cut by the laser into a roll core shape wrapped layer by layer through the rotation of a roll needle so as to form the battery core.
The existing battery cell blanking mode generally adopts a clamping plate to clamp up and down or a clamping needle to clamp left and right for blanking. However, the existing battery cell blanking mode is susceptible to the alignment between the pole pieces and the diaphragm, especially when the circumference or axial length of the battery cell is large.
In view of the above, it is very important to develop and design a blanking assembly, a battery cell blanking method and a winding device that can solve the above technical problems.
Disclosure of Invention
The invention aims to provide a blanking assembly, a battery cell blanking method and a winding device, which have the characteristics of relatively stable blanking and relatively small influence on the alignment degree of a battery cell in the blanking process.
The invention provides a technical scheme that:
in a first aspect, an embodiment of the present invention provides a blanking assembly, which includes two first clamping mechanisms and two second clamping mechanisms, where the two first clamping mechanisms and the two second clamping mechanisms are alternately arranged in a surrounding manner; the first clamping mechanism and the second clamping mechanism can be simultaneously inserted into the battery cell on the winding needle, and jointly clamp and take down the battery cell; the two first clamping mechanisms can further be far away from each other along a first straight line so that the cross section of the battery cell is polygonal, wherein the first straight line passes through the two first clamping mechanisms and is perpendicular to the axis of the battery cell; the two second clamping mechanisms can also move along a second straight line perpendicular to the first straight line and the axis of the battery cell and move to the first straight line, and meanwhile, the two first clamping mechanisms are mutually far away from each other along the first straight line, so that the cross section of the battery cell is waist-shaped.
With reference to the first aspect, in another implementation manner of the first aspect, before the two first clamping mechanisms are away from each other along a first straight line so that the cross section of the battery cell is polygonal, the two second clamping mechanisms can release the battery cell.
With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, when two second clamping mechanisms move along the second straight line, a speed of the first clamping mechanism moving along the first straight line is related to a speed of the second clamping mechanism so that a distance between the adjacent first clamping mechanism and the adjacent second clamping mechanism is kept constant.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the second clamping mechanism includes a second moving part and two second clamping parts;
the two second clamping pieces are arranged at intervals along the first straight line and connected with the second moving piece, the second moving piece can respectively drive the two second clamping pieces to clamp different positions on the battery cell, and can also drive the two second clamping pieces to move to the first straight line along the second straight line.
With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the two first clamping mechanisms are away from each other along a first straight line, so that the cross section of the battery cell is polygonal, and the second moving member can further drive the two second clamping members to be away from each other, so as to straighten a portion of the battery cell between the two second clamping members.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the second clamping piece includes two second clamping pins;
the second moving piece is connected with the two second clamping needles and can drive the two second clamping needles to close so as to clamp the battery cell; and the two second clamping needles can freely rotate around a rotating line relative to the second moving part, so that the connecting line direction of the two second clamping needles is perpendicular to the tangential direction of the part of the battery cell between the two second clamping needles, wherein the rotating line is a straight line which is positioned between the two second clamping needles and is parallel to the axial line of the second clamping needles.
With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the second clamping pin can rotate freely around its own axis, so that when the two first clamping mechanisms are away from each other along a first straight line, so that the cross section of the battery cell is polygonal, a part of the battery cell between the two second clamping pins can move.
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 clamping mechanism includes a first moving part and a first clamping part, and the first clamping part includes two first clamping pins;
the first moving part is connected with the two first clamping needles, the two first clamping needles are arranged along a first straight line, the first moving part can drive the two first clamping needles to draw close to each other so as to clamp the battery cell and can drive the first clamping needles to move along the first straight line to pull the battery cell.
In a second aspect, the embodiment of the invention further provides a winding device, which comprises the blanking assembly. The blanking assembly comprises two first clamping mechanisms and two second clamping mechanisms, and the two first clamping mechanisms and the two second clamping mechanisms are alternately arranged in a surrounding manner; the first clamping mechanism and the second clamping mechanism can be simultaneously inserted into the battery cell on the winding needle, and jointly clamp and take down the battery cell; the two first clamping mechanisms can further be far away from each other along a first straight line so that the cross section of the battery cell is polygonal, wherein the first straight line passes through the two first clamping mechanisms and is perpendicular to the axis of the battery cell; the two second clamping mechanisms can also move along a second straight line perpendicular to the first straight line and the axis of the battery cell and move to the first straight line, and meanwhile, the two first clamping mechanisms are mutually far away from each other along the first straight line, so that the cross section of the battery cell is waist-shaped.
In a third aspect, an embodiment of the present invention further provides a battery cell blanking method, which is applied to the blanking assembly; the battery cell blanking method comprises the following steps: clamping and taking down the battery cell on the winding needle through the first clamping mechanism and the second clamping mechanism; the two first clamping mechanisms are far away from each other along the first straight line, so that the cross section of the battery cell is polygonal; the two second clamping mechanisms move to the first straight line along the second straight line, and meanwhile, the two first clamping mechanisms are mutually far away from each other along the first straight line, so that the cross section of the battery cell is waist-shaped.
Compared with the prior art, the blanking assembly provided by the embodiment of the invention has the beneficial effects that:
the blanking assembly comprises two first clamping mechanisms and two second clamping mechanisms, wherein the two first clamping mechanisms and the two second clamping mechanisms are alternately arranged in a surrounding mode, in other words, the two first clamping mechanisms are arranged at intervals, the two second clamping mechanisms are arranged at intervals, the interval between the two first clamping mechanisms and the interval between the two second clamping mechanisms are overlapped, and the two first clamping mechanisms and the two second clamping mechanisms are respectively and approximately arranged on the periphery of the interval. The first clamping mechanism and the second clamping mechanism can be simultaneously inserted into the battery cell on the winding needle so as to clamp and take down the battery cell together through the first clamping mechanism and the second clamping mechanism, and therefore the action of taking down the battery cell is completed; the two first clamping mechanisms can be further away from each other along a first straight line, wherein the first straight line passes through the two first clamping mechanisms and is perpendicular to the axis of the battery cell, so that the battery cell is pulled from two sides, the part, located between the adjacent first clamping mechanism and the second clamping mechanism, of the battery cell is straightened, the cross section of the battery cell is polygonal, the alignment degree of a diaphragm and a pole piece and the alignment degree of the pole piece and the pole piece are improved, and the influence on the alignment degree of the battery cell in the process of taking down the battery cell is reduced; and two second fixture can also follow the second rectilinear motion of perpendicular to first straight line and electric core axis to move to first straight line, simultaneously, two first fixture keep away from each other along first straight line, so that the transversal personally submits the waist shape of electric core, thereby accomplish the action of flattening the electric core. So, the action of unloading subassembly through straightening electric core after taking off electric core to unloading in-process, so that diaphragm and pole piece align and pole piece align, and keep away from each other along first straight line to flatten electric core jointly gradually to first linear motion and two first fixture through two second fixture, in order to reduce to flatten the probability that electric core in-process electric core inlayer was buckled, especially to the great electric core of axial length and diameter, improved the security of battery.
Compared with the prior art, the beneficial effects of the battery cell blanking method and the winding device provided by the embodiment of the invention are the same as the beneficial effects of the blanking assembly compared with the prior art, and are not repeated herein.
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 blanking assembly according to a first embodiment of the present invention when the blanking assembly is inserted into a battery cell on a winding needle.
Fig. 2 is a schematic perspective view of a blanking assembly according to a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the blanking assembly clamping the battery cell on the winding needle according to the first embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the blanking assembly according to the first embodiment of the present invention when the battery cell on the winding needle is removed.
Fig. 5 is a schematic structural diagram of a blanking assembly provided in the first embodiment of the present invention when the battery cell is straightened.
Fig. 6 is a schematic structural diagram of the blanking assembly according to the first embodiment of the present invention when the battery cell is flattened.
Fig. 7 is a schematic flow chart of a battery cell blanking method according to a second embodiment of the present invention.
Icon: 20-rolling the needle; 10-a blanking assembly; 11-a first clamping mechanism; 111-a first moving part; 116-a first clamp; 1161-a first clip; 12-a second clamping mechanism; 122-a second moving part; 127-a second clamp; 1272-second clip; 900-electric core; a-a first straight line; b-the second straight line.
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 following detailed description of embodiments of the invention refers to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a blanking assembly 10 according to a first embodiment of the present invention when inserted into a battery cell 900 on a winding needle 20.
The first embodiment of the present invention provides a blanking assembly 10, where the blanking assembly 10 is used to remove a battery cell 900 formed by winding on a winding needle 20, and has characteristics of stable blanking and small influence of the blanking process on the alignment of the battery cell 900. The blanking assembly 10 can be applied to a winding device or the like. When the blanking assembly 10 is applied to a winding device, after the winding assembly of the winding device is wound to form the battery cell 900, the blanking assembly 10 performs blanking operation on the battery cell 900 on the winding needle 20, and since the blanking assembly 10 provided by the first embodiment of the present invention is used in the winding device, the winding device also has the characteristics of stable blanking and small influence on the alignment degree of the battery cell 900 in the blanking process.
The structural composition, the working principle and the beneficial effects of the blanking assembly 10 provided by the first embodiment of the present invention will be specifically described below.
Referring to fig. 1, and fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, fig. 2 is a schematic perspective view of a blanking assembly 10 according to a first embodiment of the present invention. Fig. 3 is a schematic structural diagram of the blanking assembly 10 according to the first embodiment of the present invention when clamping the battery cell 900 on the winding needle 20. Fig. 4 is a schematic structural diagram of the blanking assembly 10 according to the first embodiment of the present invention when the battery cell 900 on the winding needle 20 is removed. Fig. 5 is a schematic structural diagram of the blanking assembly 10 according to the first embodiment of the present invention when the battery cell 900 is straightened. Fig. 6 is a schematic structural diagram of the blanking assembly 10 according to the first embodiment of the present invention when the battery cell 900 is flattened. In fig. 2-6, line a is a first line a and line B is a second line B.
The blanking assembly 10 includes two first clamping mechanisms 11 and two second clamping mechanisms 12, wherein the two first clamping mechanisms 11 and the two second clamping mechanisms 12 are alternately arranged around, in other words, the two first clamping mechanisms 11 are arranged at intervals, the two second clamping mechanisms 12 are arranged at intervals, the interval between the two first clamping mechanisms 11 coincides with the interval between the two second clamping mechanisms 12, and the two first clamping mechanisms 11 and the two second clamping mechanisms 12 are respectively arranged approximately around the interval, as shown in fig. 1 and fig. 3.
Moreover, the first clamping mechanism 11 and the second clamping mechanism 12 can be inserted into the battery cell 900 on the winding needle 20 at the same time, so that the battery cell 900 is clamped and taken down by the first clamping mechanism 11 and the second clamping mechanism 12 together, thereby completing the action of taking down the battery cell 900; the two first clamping mechanisms 11 can further be away from each other along a first straight line a, wherein the first straight line a is a straight line passing through the two first clamping mechanisms 11 and perpendicular to the axis of the battery cell 900, so that the battery cell 900 is pulled from two sides to straighten the portion, located between the adjacent first clamping mechanism 11 and the second clamping mechanism 12, of the battery cell 900, so that the cross section of the battery cell 900 is polygonal, as shown in fig. 5, the alignment degree of the diaphragm and the pole piece and the alignment degree of the pole piece and the pole piece are improved, and the influence on the alignment degree of the battery cell 900 in the process of taking off the battery cell 900 is reduced; and the two second clamping mechanisms 12 can also move along a second straight line B perpendicular to the first straight line a and the axis of the battery cell 900 and move to the first straight line a, and meanwhile, the two first clamping mechanisms 11 are mutually far away from each other along the first straight line a, so that the cross section of the battery cell 900 is in a waist shape, as shown in fig. 6, and the action of flattening the battery cell 900 is completed. Thus, the blanking assembly 10 performs the action of straightening the battery cell 900 after the battery cell 900 is taken down in the blanking process, so as to align the diaphragm with the pole piece and align the pole piece with the pole piece, and the two second clamping mechanisms 12 move towards the first straight line a and the two first clamping mechanisms 11 are mutually far away from each other along the first straight line a to flatten the battery cell 900 gradually, so as to reduce the probability of breaking the inner layer of the battery cell 900 in the process of flattening the battery cell 900, and especially for the battery cell 900 with larger axial length and diameter, the safety of the battery is improved.
Further, when two second clamping mechanisms 12 move along the second straight line B, the speed of the first clamping mechanism 11 moving along the first straight line a is related to the speed of the second clamping mechanism 12, so that the distance between the adjacent first clamping mechanism 11 and the adjacent second clamping mechanism 12 is kept constant. For example, in the present embodiment, the speed of the first clamping mechanism 11 moving along the first straight line a is V1While the second clamping mechanism 12 moves along a second straight line B at a speed V2Then, the speed relationship between the first clamping mechanism 11 and the second clamping mechanism 12 is:
where R is the radius of the circumscribed circle in fig. 5, and S is the moving distance of the first clamping mechanism 11.
It should be noted that, in this embodiment, the number of the second clamping mechanisms 12 and the number of the first clamping mechanisms 11 are two, and in other embodiments, the number of the second clamping mechanisms 12 may be another even number, and in addition, in this embodiment, the two first clamping mechanisms 11 are horizontally arranged at intervals, and the two second clamping mechanisms 12 are approximately vertically arranged at intervals, in other embodiments, the two first clamping mechanisms 11 may also be arranged at intervals along an inclined line, and the two second clamping mechanisms 12 may also be arranged at intervals along an inclined line.
Further, the first gripper mechanism 11 includes a first moving member 111 and a first gripper 116, the first gripper 116 includes two first gripping needles 1161, moreover, the first moving part 111 is connected to the two first clipping needles 1161, the two first clipping needles 1161 are arranged along the first straight line a, and the first moving part 111 can drive the two first clipping needles 1161 to approach each other, thereby clamping the battery cell 900, and in addition, the first moving part 111 can drive the first clamping pin 1161 to move along the first straight line a to pull the battery cell 900, and thus, by the first clamp pin 1161 arranged along the first straight line a and moving along the first straight line a, to maintain the state of the portion of the battery cell 900 clamped by the first clamping member 116 when the battery cell 900 is removed, the battery cell 900 is straightened, and the battery cell 900 is flattened, so as to align the diaphragm and the pole piece of the cell 900 with respect to the portion held by the first clamping member 116 during the process of straightening the cell 900 and flattening the cell 900.
Further, before the two first clamping mechanisms 11 are away from each other along the first straight line a so that the cross section of the battery cell 900 is polygonal, that is, before the battery cell 900 is straightened, the two second clamping mechanisms 12 can release the battery cell 900, so that during the process of straightening the battery cell 900, the portion of the battery cell 900 between the two first clamping mechanisms 11 can be uniformly straightened, so that the diaphragm is easily aligned with the pole pieces and the pole pieces are easily aligned with each other.
In addition, when the second clamping mechanisms 12 move along the second straight line B, the two second clamping mechanisms 12 can also keep the state of releasing the battery cell 900, so that the battery cell 900 can generate small displacement between layers in the battery cell 900 under the limitation of the second clamping mechanisms 12, and the probability of folding the inner layer of the battery cell 900 in the process of flattening the battery cell 900 is further reduced.
Further, in this embodiment, the second clamping mechanism 12 includes a second moving part 122 and two second clamping parts 127, and the two second clamping parts 127 are disposed at intervals along the first straight line a and connected to the second moving part 122, the second moving part 122 can respectively drive the two second clamping parts 127 to clamp different positions on the battery cell 900, and thus, the second clamping parts 127 disposed at intervals clamp different positions of the battery cell 900, so that when the battery cell 900 is taken down, the sagging degree of each part of the battery cell 900 under the action of gravity is small, and when the battery cell 900 is straightened, the internal angle of the polygon of the battery cell 900 is large, and the influence on the relative position between each layer in the battery cell 900 when the battery cell 900 is straightened is reduced. The second moving part 122 can also drive the two second clamping parts 127 to move along the second straight line B to the first straight line a.
In addition, in other embodiments, when the two first clamping mechanisms 11 are away from each other along the first straight line a, so that the cross section of the battery cell 900 is polygonal, that is, when the battery cell 900 is straightened, the second moving part 122 can further drive the two second clamping pieces 127 to be away from each other, so as to straighten a part of the battery cell 900 between the two second clamping pieces 127, so as to reduce the degree of movement of the battery cell 900 in the second clamping pieces 127 when the battery cell 900 is straightened, and the distance that the two second clamping pieces 127 are away from each other can be calculated according to the distance between the two second clamping pieces 127 and the diameter of the battery cell 900.
Further, the second clamping member 127 may include two second clamping pins 1272, and the second moving member 122 is connected to the two second clamping pins 1272 and can drive the two second clamping pins 1272 to close, thereby clamping the battery cell 900, and the two second clamping pins 1272 can freely rotate around a rotation line (not shown) relative to the second moving part 122, wherein the rotation line is a straight line which is located between the two second clamping needles 1272 and is parallel to the axes of the second clamping needles 1272, in other words, the two second clamping needles 1272 can adjust the clamping direction by rotating around the rotation line, so that the connection direction of the two second clamping needles 1272 is perpendicular to the tangential direction of the part of the battery cell 900 between the two second clamping needles 1272, as shown in fig. 3, 4, 5 and 6, the second clip 1272 is made to adapt to the shape of the battery cell 900, to reduce the effect of the second clamping member 127 on the shape of the cell 900 when the cell 900 is straightened and when the cell 900 is flattened.
Moreover, the second clamping pins 1272 can also rotate freely around their own axes, so that when the two first clamping mechanisms 11 are away from each other along the first straight line a, so that the cross section of the battery cell 900 is polygonal, that is, when the battery cell 900 is straightened, a part of the battery cell 900 between the two second clamping pins 1272 can move between the two second clamping pins 1272, and friction between the second clamping pins 1272 and the battery cell 900 is reduced.
It should be noted that, in this embodiment, the first moving part 111 and the second moving part 122 may be formed by sequentially connecting a plurality of linear moving mechanisms and clamping driving mechanisms, and the first moving part 111 and the second moving part 122 may drive corresponding clamping pins to respectively extend to the inside and the outside of the electrical core 900, clamp the electrical core 900, remove the electrical core 900, straighten and flatten the electrical core 900, or of course, in other embodiments, the first moving part 111 and the second moving part 122 may also be mechanical arms.
In addition, in the present embodiment, the cross-section of the first clip 1161 and the second clip 1272 is circular, and the end edge is provided with a chamfer, in other embodiments, the cross-section of the first clip 1161 and the second clip 1272 may also be other shapes such as diamond, square, triangle, and oval. The first clamping pin 1161 and the second clamping pin 1272 may also have a heating function, so as to compound the pole pieces and the diaphragm in the electrical core 900, release the stress of the diaphragm and the pole pieces in advance, and further reduce the risk of folding the inner side of the electrical core 900.
In summary, the first embodiment of the present invention provides a blanking assembly 10, which has the characteristics of stable blanking and small influence on the alignment of the battery cell 900 during the blanking process.
Second embodiment:
referring to fig. 7, fig. 7 is a schematic flow chart of a battery cell blanking method according to a second embodiment of the present invention.
A second embodiment of the present invention provides a battery cell blanking method, which is applied to the blanking assembly 10, and has the characteristics of relatively stable blanking and relatively small influence of the blanking process on the alignment degree of the battery cell 900. It should be noted that the basic principle and the generated technical effects of the method for blanking a battery cell provided in the present embodiment are the same as those of the above embodiments, and for brief description, no part of the present embodiment is mentioned, and reference may be made to the corresponding contents in the above embodiments.
The battery cell blanking method comprises the following steps:
step S100: clamping and taking down the battery cell 900 on the winding needle 20 through the first clamping mechanism 11 and the second clamping mechanism 12;
step S200: the two first clamping mechanisms 11 are far away from each other along the first straight line a, so that the cross section of the battery cell 900 is polygonal;
step S300: the two second clamping mechanisms 12 move to the first straight line a along the second straight line B, and meanwhile, the two first clamping mechanisms 11 are away from each other along the first straight line a, so that the cross section of the battery cell 900 is waist-shaped.
In the blanking process, the battery cell 900 is firstly straightened and then the battery cell 900 is flattened after the battery cell 900 is taken down, so that the diaphragm is aligned with the pole piece and the pole piece is aligned with the pole piece in the process of straightening the battery cell 900, and the battery cell 900 is firstly straightened before being flattened to be polygonal, so that the probability of folding the inner layer of the battery cell 900 in the process of flattening the battery cell 900 is reduced, particularly for the battery cell 900 with larger axial length and diameter.
In addition, during the process of flattening the battery cell 900, the speed of the first clamping mechanism 11 moving along the first straight line a may be controlled to be related to the speed of the second clamping mechanism 12 moving, so as to keep the distance between the adjacent first clamping mechanism 11 and the adjacent second clamping mechanism 12 constant, and reduce the magic friction between the second clamping mechanism 12 and the battery cell 900. And before the cell 900 is straightened, the two second clamping mechanisms 12 can also loosen the cell 900, so that the part of the cell 900 between the two first clamping mechanisms 11 can be straightened uniformly in the process of straightening the cell 900, and the diaphragm is aligned with the pole pieces easily and the pole pieces are aligned easily.
In summary, the following steps:
a second embodiment of the present invention provides a method for blanking a battery cell, which has the characteristics of relatively stable blanking and relatively small influence of the blanking process on the alignment degree of the battery cell 900.
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. The blanking assembly is characterized by comprising two first clamping mechanisms (11) and two second clamping mechanisms (12), wherein the two first clamping mechanisms (11) and the two second clamping mechanisms (12) are alternately arranged in a surrounding manner;
the first clamping mechanism (11) and the second clamping mechanism (12) can be simultaneously inserted into the battery core (900) on the winding needle (20), and jointly clamp and remove the battery core (900);
the two first clamping mechanisms (11) can further be far away from each other along a first straight line (A) so that the cross section of the battery cell (900) is polygonal, wherein the first straight line (A) is a straight line which passes through the two first clamping mechanisms (11) and is perpendicular to the axis of the battery cell (900);
the two second clamping mechanisms (12) can also move along a second straight line (B) perpendicular to the first straight line (A) and the axis of the battery core (900) and move to the first straight line (A), and meanwhile, the two first clamping mechanisms (11) are mutually far away from each other along the first straight line (A) so that the cross section of the battery core (900) is waist-shaped.
2. The blanking assembly of claim 1, wherein the two second clamping mechanisms (12) are capable of releasing the battery cell (900) before the two first clamping mechanisms (11) are moved away from each other along a first straight line (a) to give the battery cell (900) a polygonal cross-section.
3. The blanking assembly of claim 1, wherein the speed of movement of the first gripping means (11) along the first line (a) is related to the speed of movement of the second gripping means (12) when two of the second gripping means (12) are moved along the second line (B) so that the distance between adjacent first gripping means (11) and second gripping means (12) remains constant.
4. The blanking assembly of claim 1, wherein the second gripping mechanism (12) comprises a second moving member (122) and two second gripping members (127);
the two second clamping pieces (127) are arranged at intervals along the first straight line (A) and connected with the second moving piece (122), the second moving piece (122) can respectively drive the two second clamping pieces (127) to clamp different positions on the battery cell (900), and can also drive the two second clamping pieces (127) to move to the first straight line (A) along the second straight line (B).
5. The blanking assembly of claim 4, wherein the second moving member (122) is further capable of moving the two second clamping members (127) away from each other to straighten a portion of the battery cell (900) between the two second clamping members (127) while the two first clamping mechanisms (11) are moved away from each other along a first straight line (A) to make the cross section of the battery cell (900) have a polygonal shape.
6. The blanking assembly of claim 4, wherein the second clamp (127) comprises two second clamp pins (1272);
the second moving part (122) is connected with the two second clamping needles (1272) and can drive the two second clamping needles (1272) to approach to clamp the battery cell (900); and the two second clamping needles (1272) can freely rotate around a rotation line relative to the second moving part (122), so that the connection line direction of the two second clamping needles (1272) is perpendicular to the tangential direction of the part of the battery core (900) between the two second clamping needles (1272), wherein the rotation line is a straight line which is positioned between the two second clamping needles (1272) and is parallel to the axis of the second clamping needle (1272).
7. The blanking assembly of claim 6, wherein the second clamping pin (1272) is freely rotatable about its own axis to enable a portion of the cell (900) between the two second clamping pins (1272) to move when the two first clamping mechanisms (11) are moved away from each other along a first straight line (A) to make the cross-section of the cell (900) polygonal.
8. Blanking assembly according to any one of claims 1 to 7, wherein the first gripping mechanism (11) comprises a first moving member (111) and a first gripping member (116), the first gripping member (116) comprising two first gripping needles (1161);
the first moving part (111) is connected with the two first clamping needles (1161), the two first clamping needles (1161) are arranged along the first straight line (A), the first moving part (111) can drive the two first clamping needles (1161) to be close to each other so as to clamp the battery cell (900), and the first clamping needles (1161) can be driven to move along the first straight line (A) so as to pull the battery cell (900).
9. A battery cell blanking method, characterized by being applied to the blanking assembly of any one of claims 1 to 8;
the battery cell blanking method comprises the following steps:
clamping and removing the battery core (900) on the winding needle (20) through the first clamping mechanism (11) and the second clamping mechanism (12);
the two first clamping mechanisms (11) are far away from each other along the first straight line (A) so as to enable the cross section of the battery cell (900) to be polygonal;
the two second clamping mechanisms (12) move to the first straight line (A) along the second straight line (B), and meanwhile, the two first clamping mechanisms (11) are far away from each other along the first straight line (A), so that the cross section of the battery cell (900) is waist-shaped.
10. Winding device, characterized in that it comprises a blanking assembly according to any one of claims 1 to 8.
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| CN114284569B (en) | 2023-09-05 |
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