CN114204226B - Tab pre-folding tool and tab pre-folding method - Google Patents
Tab pre-folding tool and tab pre-folding method Download PDFInfo
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- CN114204226B CN114204226B CN202111478638.2A CN202111478638A CN114204226B CN 114204226 B CN114204226 B CN 114204226B CN 202111478638 A CN202111478638 A CN 202111478638A CN 114204226 B CN114204226 B CN 114204226B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005452 bending Methods 0.000 claims description 24
- 238000005096 rolling process Methods 0.000 claims description 10
- 210000001503 joint Anatomy 0.000 claims 1
- 230000008602 contraction Effects 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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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
-
- 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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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to the technical field of tab pre-folding, and discloses a tab pre-folding tool and a tab pre-folding method. Wherein utmost point ear is book frock in advance includes: a fixing seat; the movable blocks are positioned on one side of the fixed seat and can enclose a round hole, and each movable block can move along the radial direction of the round hole; the telescopic assembly is located one side of the fixed seat, which is away from the movable blocks, the movable end of the telescopic assembly is connected with each movable block through a connecting wire, when the movable end of the telescopic assembly is retracted inwards, the movable blocks can move along the radial direction of the round hole, which is close to the circle center, at the same time, the movable blocks bend the lugs of the battery cell, which are abutted with the movable blocks. According to the tab pre-folding tool disclosed by the invention, synchronous movement of a plurality of moving blocks is realized through the expansion and contraction of the expansion and contraction assembly, and when the distance value between the center of the fixed seat and each moving block is changed from large to small, the tab contacted with the moving block is folded along with the pushing of the moving block, so that the operation is simple.
Description
Technical Field
The invention relates to the technical field of tab pre-folding, in particular to a tab pre-folding tool and a tab pre-folding method.
Background
Along with the pursuit of high energy and high multiplying power performance of power batteries, multipolar ear cells are generated, and at present, the molding modes of the multipolar ear cells are mainly divided into two types: one is rubbing, the forming mode can generate more metal scraps, and the metal scraps can reduce the safety performance of the battery cell, so that the use of the battery cell is affected; the other is to flatten, needs to pre-fold the tab before flattening, if the tab is not bent in advance, the flattened tab can be bent for many times, on one hand, the welding effect can be affected by the bent tab for many times, and on the other hand, the space occupied by the flattened tab can be increased, so that a tool capable of pre-folding the tab before flattening is needed.
Disclosure of Invention
Based on the above, the invention aims to provide a tab pre-folding tool and a tab pre-folding method, which solve the problem of pre-folding the tab before flattening the tab, improve the welding effect of the flattened tab and reduce the space occupied by the flattened tab.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a tab pre-folding tool, comprising: a fixing seat; the moving blocks are positioned on one side of the fixed seat, the moving blocks can enclose a round hole taking the center of the fixed seat as the center of a circle, and each moving block can move along the radial direction of the round hole; the telescopic components are positioned on one side of the fixed seat, which is away from the moving blocks, the movable ends of the telescopic components are connected with each moving block through connecting wires, and when the movable ends of the telescopic components extend outwards, the moving blocks can move along the radial direction of the round hole at the same speed in the direction away from the circle center; when the movable end of the telescopic assembly is retracted inwards, the moving blocks can move in the direction close to the circle center along the radial direction of the round hole at the same speed, and meanwhile, the moving blocks can bend the lugs of the battery cell abutted with the moving blocks.
As the preferred scheme of a tab prefolding frock, the tab prefolding frock still includes the elastic component, the one end of elastic component with the fixing base links to each other, the other end of elastic component with the movable block links to each other, can compress when stretching out the expansion end of flexible subassembly the elastic component, the elastic component can restore to the throne the movable block so that the expansion end of flexible subassembly is inwards retrieved.
As a preferred scheme of tab pre-folding frock, be equipped with on the movable block along the radial extension of round hole first cylinder recess, be equipped with on the fixing base just right first cylinder recess's second cylinder recess, the one end of elastic component stretches into in the first cylinder recess and with the movable block links to each other, the other end of elastic component stretches into in the second cylinder recess and with the fixing base links to each other.
As an optimal scheme of tab pre-folding tool, the moving block is a sector annular block, a plurality of moving blocks can be spliced to form an annular disc, and an inner hole of the annular disc is the round hole.
As an optimal scheme of tab pre-folding tool, a rolling wheel is arranged on the moving block, a guide rail extending along the radial direction of the round hole is arranged on the fixed seat, and the rolling wheel can roll along the guide rail.
As a preferred scheme of tab pre-folding tool, a guide roller is arranged on the fixed seat, one end of the connecting wire is fixed on the moving block, and the other end of the connecting wire bypasses the guide roller and is connected with the movable end of the telescopic assembly.
As a pole ear prefolding frock's preferred scheme, the fixing base is first disc, flexible subassembly includes: the sleeve is fixed on the fixed seat; one end of the sliding piece is in sliding connection with the sleeve; and the second disc is arranged at the other end of the sliding piece, and the connecting lines connected with each moving block are fixed on the second disc.
As a preferred scheme of tab pre-folding frock, the center of fixing base be equipped with buckle recess and a plurality of with buckle recess intercommunication positioning groove, every the movable block all is located one positioning groove is interior, and a plurality of the round hole that the movable block encloses just is to buckle the recess setting.
The tab pre-folding method is suitable for the tab pre-folding tool in any scheme, and comprises the following steps:
the movable end of the telescopic assembly extends outwards, and the plurality of moving blocks move along the radial direction of the round hole along the direction away from the circle center at the same speed along with the telescopic assembly until the distance value from the center of the fixed seat to each moving block is increased to a first preset distance value;
extending the electrode lugs of the battery cell into a pre-folded groove surrounded by a plurality of moving blocks and attaching the electrode lugs with the moving blocks;
the movable end of the telescopic assembly is retracted inwards, the moving blocks move along the radial direction of the round hole towards the direction close to the circle center at the same speed along with the telescopic assembly, the moving blocks push the pole lugs to bend, and meanwhile, the distance value from the center of the fixing seat to each moving block is reduced.
As a preferable scheme of the pre-folding method of the electrode lug, the fixing seat is provided with a bending groove opposite to the round hole, and when the electrode lug of the battery cell stretches into the pre-folding groove, the end part of the electrode lug and the bottom wall of the bending groove are arranged at intervals.
The beneficial effects of the invention are as follows: according to the tab pre-folding tool disclosed by the invention, synchronous movement of a plurality of moving blocks is realized through the expansion and contraction of the expansion and contraction assembly, so that the distance value from the center of the fixed seat to each moving block is changed, when the distance value from the center of the fixed seat to each moving block is changed from large to small, the tab contacted with the moving block is folded along with the pushing of the moving block, thus the pre-folding of the tab of the battery core is realized, the folding angle of the tab can be changed by adjusting the change amount of the distance value from the center of the fixed seat to each moving block, the operation is simple, the acting force of the tool on the tab during transverse cutting is greatly reduced when the tab is pre-folded, the yield of the tab after pre-folding is increased, the problem of pre-folding the tab before flattening is solved, the welding effect of the tab after flattening is improved, and the space occupied by the tab after flattening is reduced.
The pre-folding method of the tab disclosed by the invention is simple to operate and easy to realize, and realizes the rapid folding of the tab of the battery cell.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic diagram of a moving block, a rolling wheel, a ring, etc. of a tab pre-folding tool according to an embodiment of the present invention;
fig. 2 is a top view of a tab pre-folding tool in a first state according to an embodiment of the present invention;
fig. 3 is a side view of a tab pre-folding tool in a first state according to an embodiment of the present invention;
FIG. 4 is a top view of a tab pre-break tool according to an embodiment of the present invention in a second state;
fig. 5 is a side view of a tab pre-folding tool according to an embodiment of the present invention in a second state.
In the figure:
11. a fixing seat; 1101. a second cylindrical recess; 1102. bending the groove; 1103. a positioning groove; 12. A guide roller;
20. a round hole; 21. a moving block; 201. a first cylindrical recess; 22. a rolling wheel; 23. a circular ring;
3. a telescoping assembly; 31. a sleeve; 32. a slider; 33. a second disc;
4. a connecting wire;
5. an elastic member.
Detailed Description
In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The embodiment provides a tab pre-folding tool, as shown in fig. 1 to 5, which comprises a fixed seat 11, twenty-four moving blocks 21 and a telescopic assembly 3, wherein the twenty-four moving blocks 21 are positioned on one side of the fixed seat 11, the twenty-four moving blocks 21 can enclose a round hole 20 taking the center of the fixed seat 11 as a circle center, each moving block 21 can move along the radial direction of the round hole 20, the telescopic assembly 3 is positioned on one side of the fixed seat 11 away from the moving block 21, the movable end of the telescopic assembly 3 is connected with each moving block 21 through a connecting wire 4, and when the movable end of the telescopic assembly 3 extends outwards, the twenty-four moving blocks 21 can move along the radial direction of the round hole 20 at the same speed in a direction away from the circle center; when the movable end of the telescopic assembly 3 is retracted inwards, twenty-four moving blocks 21 can move along the radial direction of the round hole 20 at the same speed towards the direction close to the circle center, and meanwhile, the moving blocks 21 can bend the lugs of the battery cell which are abutted with the moving blocks 21. In other embodiments of the present invention, the number of the moving blocks 21 is not limited to twenty-four in the present embodiment, but may be other numbers, and the moving blocks 21 may enclose a circular hole 20 with the center of the fixed seat 11 as the center, and the specific number of the moving blocks 21 may be set according to actual needs.
The tab pre-folding tool of this embodiment is suitable for presetting the tab of the cylindrical battery cell of the multipolar tab, when bending the tab, the movable end of the telescopic component 3 is extended outwards, so that twenty-four moving blocks 21 can move along the radial direction of the round hole 20 at the same speed in a direction away from the circle center, twenty-four moving blocks 21 enclose a circular pre-folding groove until the distance value from the center of the fixed seat 11 to each moving block 21 increases to a first preset distance value, then the cylindrical battery cell is clamped by the fixed tool, so that the tab at the end of the cylindrical battery cell extends into the pre-folding groove and is attached to the moving blocks 21, the movable end of the telescopic component 3 is retracted inwards, the moving blocks 21 push the tab to bend along the radial direction of the round hole 20 at the same speed along with the telescopic component 3, meanwhile, the distance value from the center of the fixed seat 11 to each moving block 21 is reduced until twenty-four moving blocks 21 enclose the round hole 20, and the radius of the round hole 20 is reduced to a second preset distance value. By changing the first preset distance value and/or the second preset distance value, the difference value between the first preset distance value and the second preset distance value is changed, namely the moving distance of the moving block 21 is changed, so that the change of the bending angle of the lug of the battery cell is realized, and the requirement that a user bends the lug of the battery cell to different angles is met.
It should be noted that, the above-mentioned fixed frock belongs to prior art, as long as can the centre gripping cylinder electricity core and make the cylinder electricity core for fixing base 11 the fixed position can, fixed frock specific accessible outsourcing obtains, and this is not repeated here.
According to the tab pre-folding tool, synchronous movement of the plurality of moving blocks 21 is achieved through stretching of the stretching assembly 3, the distance value from the center of the fixed seat 11 to each moving block 21 is changed, when the distance value is changed from large to small, the tab contacted with the moving block 21 is folded along with pushing of the moving block 21, the tab of the battery cell is pre-folded, the folding angle of the tab can be changed by adjusting the variable quantity of the distance value, the operation is simple, the acting force of the tool on the tab during transverse cutting is greatly reduced when the tab is pre-folded, the yield of the tab after pre-folding is increased, the problem that the tab is pre-folded before flattening is solved, the welding effect of the tab after flattening is improved, and the occupied space of the tab after flattening is reduced.
As shown in fig. 2 and 4, the tab pre-folding tool of this embodiment further includes an elastic member 5, where the elastic member 5 is a spring, one end of the elastic member 5 is connected to the fixed seat 11, the other end of the elastic member 5 is connected to the moving block 21, the movable end of the telescopic assembly 3 can compress the elastic member 5 when extending outwards, and the elastic member 5 can restore the moving block 21 to enable the movable end of the telescopic assembly 3 to retract inwards. That is, when the elastic member 5 is in a compressed state, the acting force of the elastic member 5 on the moving block 21 faces the center of the circular hole 20, once the acting force of the telescopic assembly 3 on the moving block 21 through the connecting wire 4 is removed, the elastic member 5 can push the moving block 21 to move along the radial direction of the circular hole 20 towards the direction close to the center of the circular hole, so that the moving block 21 is reset, at this time, the distance from the center of the fixing seat 11 to each moving block 21 is minimum, twenty-four moving blocks 21 enclose the circular hole 20, and at the same time, the movable end of the telescopic assembly 3 connected with the moving block 21 through the connecting wire 4 is reset.
Further, as shown in fig. 1, the moving block 21 of the present embodiment is provided with a first cylindrical groove 201 extending along the radial direction of the circular hole 20, as shown in fig. 2 and 4, the fixed seat 11 is provided with a second cylindrical groove 1101 opposite to the first cylindrical groove 201, one end of the elastic member 5 extends into the first cylindrical groove 201 and is connected with the moving block 21, the other end of the elastic member 5 extends into the second cylindrical groove 1101 and is connected with the fixed seat 11, and the first cylindrical groove 201 and the second cylindrical groove 1101 can play a guiding role in the compression process and the extension process of the elastic member 5, so that the length of the elastic member 5 extends along the radial direction of the circular hole 20 all the time, thereby ensuring that the moving block 21 can move along the radial direction of the circular hole 20. The diameter of the first cylindrical groove 201, the diameter of the second cylindrical groove 1101 and the diameter of the elastic member 5 are all the same, the depth of the first cylindrical groove 201 is the same as the depth of the second cylindrical groove 1101, and the first cylindrical groove 201 is located at the center of the side edge of the moving block 21, so as to ensure that the moving block 21 can smoothly move along the radial direction of the circular hole 20 under the pushing of the elastic member 5, and reduce the possibility of tilting of the moving block 21 in the moving process.
As shown in fig. 2 and 4, the fixed seat 11 of the present embodiment is a first disc, the moving blocks 21 are fan-shaped annular blocks, twenty-four moving blocks 21 can be spliced to form an annular disc, and an inner hole of the annular disc is a circular hole. Specifically, the sector ring block of the present embodiment is formed by twenty-four equally dividing an annular disk. The center of the fixing seat 11 of this embodiment is provided with a bending groove 1102 and a plurality of positioning grooves 1103 communicated with the bending groove 1102, the opening of each second cylindrical groove 1101 is set towards the positioning groove 1103, each moving block 21 is located in one positioning groove 1103, the pre-folded groove surrounded by twenty-four moving blocks 21 is opposite to the bending groove 1102, and the set positioning groove 1103 can increase the depth of the tab extending into the positioning groove 1103 when bending the tab, thereby ensuring the bending effect of the tab.
As shown in fig. 1, 2 and 4, the moving block 21 of the present embodiment is provided with a rolling wheel 22, and the fixed seat 11 is provided with a guide rail (not shown) extending along the radial direction of the circular hole 20, and the rolling wheel 22 can roll along the guide rail. Specifically, two rows of rolling wheels 22 are provided on each moving block 21, and the smoothness of the moving block 21 moving on the fixed seat 11 can be improved by providing two rows of rolling wheels 22. In other embodiments, a sliding rail extending along the radial direction of the round hole 20 may be provided on the fixed seat 11, a sliding groove corresponding to the sliding rail is provided on the moving block 21, and the moving block 21 may slide along the sliding rail.
In order to reduce the abrasion of the fixing base 11 to the connecting wire 4, as shown in fig. 2 to 5, a guiding roller 12 is provided on the fixing base 11 of the present embodiment, one end of the connecting wire 4 is fixed on the moving block 21, and the other end of the connecting wire 4 bypasses the guiding roller 12 and is connected with the movable end of the telescopic assembly 3. Two circular rings 23 are arranged on each moving block 21 of the embodiment, the circular rings 23 are located on the outer ring of an annular disc formed by splicing the moving blocks 21, the plane where the circular rings 23 are located is parallel to the plane where the surface of the moving block 21 is located, one end of a connecting wire 4 is fixed on the circular rings 23, and the other end of the connecting wire 4 bypasses the guide roller 12 and is fixedly connected with the movable end of the telescopic assembly 3. It should be noted that, the guide rollers 12 in fig. 3 and 5 are not all shown, but only the guide rollers 12 located at two ends of the fixing base 11 when the tab pre-folding tool is viewed from the side.
As shown in fig. 3 and 5, the telescopic assembly 3 of the present embodiment includes a sleeve 31, a sliding member 32, and a second disc 33, wherein the sleeve 31 is fixed on the fixed base 11, one end of the sliding member 32 is slidably connected with the sleeve 31, the second disc 33 is disposed at the other end of the sliding member 32, and the connecting wires 4 of the second disc 33 and each moving block 21 are fixed on the second disc 33. Specifically, the sleeve 31 is an air cylinder, the sliding piece 32 comprises a sliding shaft and a piston, the piston is fixed at one end of the sliding shaft and is connected with the sliding force of the air cylinder, the second disc 33 is arranged at the other end of the sliding shaft, and the sliding shaft and the piston drive the second disc 33 to move in the horizontal direction by changing the pressure of air in the air cylinder, so that the moving block 21 moves along the radial direction of the fixed seat 11. In other embodiments, the structure of the telescopic assembly 3 is not limited to this embodiment, but may be a combination structure of a linear driving member and a second disc 33, where the second disc 33 is disposed at a movable end of the linear driving member, and the linear driving member may be a hydraulic cylinder or an electric push rod, etc., and those skilled in the art may select according to actual needs.
The embodiment also provides a tab pre-folding method, which is applicable to the tab pre-folding tool according to the above technical scheme, and comprises the following steps:
the movable end of the telescopic assembly 3 extends outwards, and the plurality of moving blocks 21 move along the radial direction of the round hole 20 along the direction away from the circle center at the same speed along with the telescopic assembly 3 until the distance value from the center of the fixed seat 11 to each moving block 21 increases to a first preset distance value;
extending the electrode lugs of the battery cells into a pre-folded groove surrounded by a plurality of moving blocks 21 and attaching the electrode lugs to the moving blocks 21;
the movable end of the telescopic assembly 3 is retracted inwards, the plurality of moving blocks 21 move along the radial direction of the round hole 20 along the direction close to the circle center along with the telescopic assembly 3 at the same speed, the moving blocks 21 push the lugs to bend, and meanwhile, the distance value from the center of the fixed seat 11 to each moving block 21 is reduced.
The pre-bending method for the tab provided by the embodiment is simple to operate and easy to realize, and the tab of the battery cell is rapidly bent.
The fixing seat 11 of this embodiment is provided with a bending groove 1102 facing the round hole 20, and when the tab of the battery core extends into the pre-bending groove, the end of the tab is spaced from the bottom wall of the bending groove 1102, so as to prevent the end of the tab from being damaged due to friction with the bending groove 1102 during the tab bending process.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. Lug pre-folding frock, its characterized in that includes:
a fixed seat (11);
the movable blocks (21) are positioned on one side of the fixed seat (11), the movable blocks (21) can enclose a round hole (20) taking the center of the fixed seat (11) as a circle center, and each movable block (21) can move along the radial direction of the round hole (20);
the telescopic assembly (3) is positioned on one side of the fixed seat (11) deviating from the movable blocks (21), the movable end of the telescopic assembly (3) is connected with each movable block (21) through a connecting wire (4), when the movable end of the telescopic assembly (3) extends outwards, the plurality of movable blocks (21) can move at the same speed along the radial direction of the round hole (20) far away from the circle center, and the plurality of movable blocks (21) enclose a circular pre-folding groove until the distance value from the center of the fixed seat (11) to each movable block (21) is increased to a first preset distance value; the electrode lugs of the battery core extend into the pre-folding groove and are attached to the movable block (21); when the movable end of the telescopic assembly (3) is retracted inwards, the plurality of moving blocks (21) can move along the radial direction of the round hole (20) at the same speed towards the direction close to the circle center, meanwhile, the moving blocks (21) can bend the lugs of the battery cell which is in butt joint with the moving blocks (21), the distance value from the center of the fixed seat (11) to each moving block (21) is reduced until the plurality of moving blocks (21) enclose the round hole (20), at the moment, the radius of the round hole (20) is reduced to a second preset distance value, and the difference value between the first preset distance value and/or the second preset distance value is changed, so that the bending angle of the lugs of the battery cell is changed;
the center of the fixed seat (11) is provided with a bending groove (1102), and a pre-bending groove formed by the surrounding of the moving blocks (21) is opposite to the bending groove (1102).
2. The tab pre-folding tool according to claim 1, further comprising an elastic piece (5), wherein one end of the elastic piece (5) is connected with the fixing seat (11), the other end of the elastic piece (5) is connected with the moving block (21), the elastic piece (5) can be compressed when the movable end of the telescopic assembly (3) extends outwards, and the elastic piece (5) can reset the moving block (21) to enable the movable end of the telescopic assembly (3) to retract inwards.
3. The tab pre-folding tool according to claim 2, wherein the moving block (21) is provided with a first cylindrical groove (201) extending along the radial direction of the round hole (20), the fixed seat (11) is provided with a second cylindrical groove (1101) opposite to the first cylindrical groove (201), one end of the elastic piece (5) extends into the first cylindrical groove (201) and is connected with the moving block (21), and the other end of the elastic piece (5) extends into the second cylindrical groove (1101) and is connected with the fixed seat (11).
4. The tab pre-folding tool according to claim 1, wherein the moving block (21) is a sector annular block, a plurality of moving blocks (21) can be spliced to form an annular disc, and an inner hole of the annular disc is the round hole (20).
5. The tab pre-folding tool according to claim 1, wherein a rolling wheel (22) is arranged on the moving block (21), a guide rail extending along the radial direction of the round hole (20) is arranged on the fixed seat (11), and the rolling wheel (22) can roll along the guide rail.
6. The tab pre-folding tool according to claim 1, wherein a guide roller (12) is arranged on the fixed seat (11), one end of the connecting wire (4) is fixed on the moving block (21), and the other end of the connecting wire (4) bypasses the guide roller (12) and is connected with the movable end of the telescopic assembly (3).
7. The tab pre-folding tool according to claim 6, wherein the fixing base (11) is a first disc, and the telescopic assembly (3) comprises:
a sleeve (31) fixed on the fixed seat (11);
a slider (32) having one end slidably connected to the sleeve (31);
and a second disc (33) provided at the other end of the slider (32), and the connection line (4) connected to each of the moving blocks (21) is fixed to the second disc (33).
8. The tab pre-folding tool according to claim 1, wherein a plurality of positioning grooves (1103) communicated with the bending grooves (1102) are formed in the center of the fixing seat (11), each moving block (21) is located in one positioning groove (1103), and round holes (20) surrounded by the moving blocks (21) are opposite to the bending grooves (1102).
9. A tab pre-folding method, which is suitable for the tab pre-folding tool according to any one of claims 1 to 8, and comprises:
the movable end of the telescopic assembly (3) extends outwards, and the plurality of moving blocks (21) move along the radial direction of the round hole (20) along the direction away from the circle center at the same speed along with the telescopic assembly (3) until the distance value from the center of the fixed seat (11) to each moving block (21) increases to a first preset distance value;
extending the electrode lugs of the battery cells into a pre-folded groove surrounded by a plurality of moving blocks (21) and attaching the electrode lugs to the moving blocks (21);
the movable end of the telescopic assembly (3) is retracted inwards, the movable blocks (21) move along the radial direction of the round hole (20) towards the direction close to the circle center at the same speed along with the telescopic assembly (3), the movable blocks (21) push the lugs to bend, and meanwhile, the distance value from the center of the fixing seat (11) to each movable block (21) is reduced.
10. The method for pre-folding the tab according to claim 9, wherein the fixing base (11) is provided with a bending groove (1102) opposite to the round hole (20), and when the tab of the battery cell extends into the pre-folding groove, the end of the tab is spaced from the bottom wall of the bending groove (1102).
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