CN113134701A - Square lithium cell welding frock clamp - Google Patents
Square lithium cell welding frock clamp Download PDFInfo
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- CN113134701A CN113134701A CN202110476581.6A CN202110476581A CN113134701A CN 113134701 A CN113134701 A CN 113134701A CN 202110476581 A CN202110476581 A CN 202110476581A CN 113134701 A CN113134701 A CN 113134701A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
- B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
According to the welding tool clamp for the square lithium battery, the aluminum shell of the square lithium battery is compressed through effective cooperation between the first pressing plate and the second pressing plate, so that the long edge of the aluminum shell of the square lithium battery is straight, the connection between the aluminum shells is compact and seamless, and the welding tool clamp is free from fire explosion and cracks. Carry out preliminary fixed to square lithium cell through compressing tightly the subassembly to use first cylinder and the second that compresses tightly to compress tightly the cylinder and exert the same pressure to the side that compresses tightly the subassembly simultaneously, further guaranteed square lithium cell's aluminum hull position equilibrium, avoided the high frequency time to adjust the position of laser welder head, be favorable to lasting laser welding. Through the first indent that sets up on first utmost point post locating piece, the second indent that sets up on second utmost point post locating piece for can protect square lithium cell's negative pole utmost point post and anodal utmost point post effectively when welding aluminium shell and apron, avoid among the welding process unnecessary burn or weld and hinder.
Description
Technical Field
The invention relates to the technical field of lithium battery welding, in particular to a square lithium battery welding tool clamp.
Background
Compared with other batteries, the lithium battery has the characteristics of high working voltage, small volume, light weight, high energy, no memory effect, no pollution, small self-discharge, long cycle life and the like, so that the lithium battery is widely applied to the fields of mobile phones, portable computers, cameras, street lamp standby power supplies, small household appliances, energy storage power supply systems and the like.
The lithium battery adopts a spiral winding structure or a lamination structure inside, and is formed by spacing a polyethylene film isolation material with very fine and strong permeability between a positive electrode and a negative electrode. The positive electrode comprises a current collector consisting of lithium cobaltate (or lithium nickel cobalt manganese oxide, lithium manganate, lithium iron phosphate and the like) and an aluminum foil, and the negative electrode comprises a current collector consisting of a petrochemical carbon material and a copper foil. Generally, a lithium battery is impregnated with an organic electrolyte solution. In order to ensure high safety and durability when the lithium battery is used, in the manufacturing and assembling process of the lithium battery, the cover plate and the aluminum shell are welded very importantly, and the sealing performance between the aluminum shell and the cover plate is mainly ensured in a laser welding mode. Whether the welding surface penetration between aluminum hull and the apron is greater than 300 mu m, whether the welding line is smooth, whether firm reliable scheduling factor can all directly lead to the fact certain influence to the lithium cell whether the welding position, including whether the lithium cell is annotating liquid in-process weeping, whether the phenomenon that electrolyte seepage can take place in welding seam department after a period of finished product lithium cell, these problems finally can direct influence the life of lithium cell.
With the development of lithium batteries, an ultrathin square lithium battery with an aluminum shell composed of two aluminum plates and positive and negative poles on one cover plate appears on the market. However, when two aluminum plates of a square lithium battery are welded, the connection between the two aluminum plates is easy to loosen, and a gap is generated at the joint, so that fire explosion can occur during welding, and the welding quality is seriously influenced; when welding aluminum shell and apron, because the energy of laser is very high, burn easily or weld the structural component who hinders the apron to influence the wholeness ability of lithium cell.
Disclosure of Invention
Based on the above, the embodiment of the invention provides a square lithium battery welding tool clamp, aiming at solving the problems that when two aluminum plates of a square lithium battery are welded, the connection between the two aluminum plates is easy to loosen, and a gap is generated at the joint, so that fire explosion can occur during welding, and the welding quality is seriously influenced; when welding aluminium shell and apron, because the energy of laser is very high, burn easily or weld the structural component who hinders the apron to influence the problem of the overall performance of lithium cell.
In order to achieve the purpose, the invention provides the following technical scheme:
a square lithium battery welding tool clamp is used for clamping and fixing a square lithium battery and comprises a base plate, a fixing frame, a limiting plate and a positioning plate; the fixing frame, the limiting plate and the positioning plate are all arranged on the base plate; one side of the positioning plate is connected with one end of the limiting plate, and the other side of the positioning plate is opposite to one end of the fixing frame;
the fixing frame comprises a first baffle, a second baffle and a fixing plate; the first baffle and the second baffle are arranged on the substrate in parallel; one end of the fixing plate is arranged at the top of the first baffle plate, and the other end of the fixing plate is arranged at the top of the second baffle plate; the first baffle plate is opposite to one side, away from the limiting plate, of the positioning plate; a plurality of first pressing cylinders and a plurality of second pressing cylinders are arranged between the fixing plate and the substrate; the first pressing cylinder is arranged on the fixing plate; the second pressing air cylinder is arranged on the substrate; the first pressing air cylinders and the second pressing air cylinders are in one-to-one correspondence.
Further, the square lithium battery welding tool clamp further comprises a pressing assembly; the pressing assembly is detachably arranged between the fixed frame and the limiting plate; one end of the pressing component abuts against the positioning plate; one side of the compressing assembly, which is far away from the fixed frame, is abutted against the limiting plate; the pressing assembly comprises a first pressing plate and a second pressing plate which have the same structure; the first pressing plate and the second pressing plate are oppositely arranged.
Further, a first contour groove is formed in one side, close to the second pressing plate, of the first pressing plate; a second contour groove is formed in one side, close to the first pressing plate, of the second pressing plate; the first profiling groove and the second profiling groove are matched with the square lithium battery.
Further, the depth sum in first profile groove with the depth sum in second profile groove is less than square lithium cell's thickness makes like this first clamp plate with the second clamp plate will square lithium cell fastening is fixed the back, first clamp plate with leave between the second clamp plate and be used for the exposed space of long limit of square lithium cell's aluminum hull ensures to weld.
Furthermore, both ends of the first pressing plate are provided with first connecting holes; and the two ends of the second pressing plate are provided with second connecting holes matched with the first connecting holes. In the invention, the compressing assembly loaded with the square lithium battery can be preliminarily fixed by using a binding belt or a shaft pin to sequentially pass through the first connecting hole and the second connecting hole so as to be convenient to carry and place.
Further, the square lithium battery welding tool fixture further comprises a supporting plate, a first pole positioning block, a side plate, a pressing strip and a third pressing cylinder; the supporting plate is arranged on one side, far away from the base plate, of the fixing plate; one end of the supporting plate is abutted against the positioning plate; one side of the supporting plate is abutted against the limiting plate; the first pole positioning block is arranged on one side, far away from the substrate, of the supporting plate; one end of the first pole positioning block abuts against the positioning plate, and the other end of the first pole positioning block abuts against a pole of the square lithium battery; the side plate is arranged at one end of the supporting plate, which is far away from one side of the limiting plate; one end of the pressing strip is arranged at the top of the side plate, and the other end of the pressing strip is arranged at the top of the limiting plate; the bottom of the pressing strip abuts against an aluminum shell of the square lithium battery; the third pressing cylinder is arranged at one end, far away from the first pole positioning block, of the supporting plate.
Furthermore, one end of the first pole positioning block, which is far away from the positioning plate, is provided with a first indent; the first inner recess is matched with a pole of the square lithium battery. In the process of welding the long edges of the aluminum shell and the cover plate, the first inner concave part can effectively protect the negative pole post and the positive pole post of the square lithium battery from being burnt or welded by laser.
Further, the square lithium battery welding tool fixture further comprises a second pole positioning block; the second polar column positioning block is arranged on one side, close to the fixed frame, of the limiting plate; one end of the second pole positioning block abuts against the positioning plate, and the other end of the second pole positioning block abuts against a pole of the square lithium battery.
Furthermore, a second indent is arranged at one end of the second pole positioning block, which is far away from the positioning plate; the second indent and the utmost point post looks adaptation of square lithium cell. When the short sides of the aluminum shell and the cover plate are welded, the second inner concave part can effectively protect the negative pole post and the positive pole post of the square lithium battery from being burned or welded by laser.
According to the welding tool fixture for the square lithium battery, the aluminum shell of the square lithium battery is compressed through effective cooperation between the first pressing plate and the second pressing plate, so that the long edge of the aluminum shell of the square lithium battery is straight, the connection between the aluminum shells is compact and seamless, and no fire is exploded or cracks are generated during welding; simultaneously, the back is good in the welding of the long limit of square lithium cell's aluminum hull, and whole square lithium cell is stereotyped, and then has guaranteed between square lithium cell apron long limit and the aluminum hull, between apron minor face and the aluminum hull all compact seamless, and high plane is straight. Carry out preliminary fixed to square lithium cell through compressing tightly the subassembly to use first cylinder and the second that compresses tightly to compress tightly the cylinder and exert the same pressure to the side that compresses tightly the subassembly simultaneously, further guaranteed square lithium cell's aluminum hull position equilibrium, avoided the high frequency time to adjust the position of laser welder head, be favorable to the laser welding that carries on that lasts. Through the first indent that sets up on first utmost point post locating piece, the second indent that sets up on second utmost point post locating piece for can protect square lithium cell's negative pole utmost point post and anodal utmost point post effectively when welding aluminium shell and apron, avoid among the welding process unnecessary burn or weld and hinder. Compress tightly cylinder and layering through setting up the third and fix square lithium cell completely, the skew can not take place for square lithium cell when having ensured the welding, has promoted welded accuracy and stability, has also improved welded security simultaneously.
According to the invention, all sides (including the long side of the aluminum shell, the long side and the short side of the positive and negative cover plates, and the like) of the square lithium battery can be welded on the same tool clamp, so that the three-dimensional welding of the square lithium battery is realized; and the welding position has no gap, so that the problems of welding, fire explosion, cracks and the like can be avoided, the welding is convenient and quick, the utilization rate is high, and the welding device can be suitable for welding longer, narrower and thinner square lithium batteries.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic perspective view of a square lithium battery welding tool fixture according to embodiment 1 of the present invention;
FIG. 2 is an exploded view of the hold-down assembly of FIG. 1;
FIG. 3 is a perspective view of the second platen of FIG. 2;
fig. 4 is a schematic perspective view of a square lithium battery welding tool fixture according to embodiment 2 of the present invention;
fig. 5 is a schematic perspective view of the first pole positioning block in fig. 4;
fig. 6 is a schematic perspective view of a square lithium battery welding tool fixture according to embodiment 3 of the present invention;
fig. 7 is a schematic perspective view of the second pole positioning block in fig. 6.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, top and bottom … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
With the development of lithium batteries, an ultrathin square lithium battery with an aluminum shell composed of two aluminum plates and positive and negative poles on one cover plate appears on the market. However, when two aluminum plates of a square lithium battery are welded, the connection between the two aluminum plates is easy to loosen, and a gap is generated at the joint, so that fire explosion can occur during welding, and the welding quality is seriously influenced; when welding aluminum shell and apron, because the energy of laser is very high, burn easily or weld the structural component who hinders the apron, lead to influencing the wholeness ability of lithium cell. In order to solve the technical problem, the invention provides a square lithium battery welding tool clamp.
Example 1:
as shown in fig. 1, a welding fixture for a square lithium battery according to an embodiment of the present invention is used for clamping and fixing a square lithium battery a, and includes a substrate 1, a fixing frame 2, a limiting plate 3, and a positioning plate 4; the fixed frame 2, the limiting plate 3 and the positioning plate 4 are all arranged on the base plate 1; one side of the positioning plate 4 is connected with one end of the limiting plate 3, and the other side of the positioning plate is opposite to one end of the fixing frame 2; the fixing frame 2 comprises a first baffle plate 21, a second baffle plate 22 and a fixing plate 23; the first baffle plate 21 and the second baffle plate 22 are arranged on the substrate 1 in parallel; one end of the fixing plate 23 is arranged at the top of the first baffle plate 21, and the other end is arranged at the top of the second baffle plate 22; one side of the first baffle plate 21 is opposite to one side of the positioning plate 4 far away from the limiting plate 3; a plurality of first pressing cylinders 5 and a plurality of second pressing cylinders 6 are arranged between the fixing plate 23 and the substrate 1; the first pressing cylinder 5 is arranged on the fixing plate 23; the second pressing air cylinder 6 is arranged on the substrate 1; the first pressing air cylinders 5 correspond to the second pressing air cylinders 6 one by one.
Referring to fig. 1 and 2, in the present embodiment, the welding tool fixture for square lithium batteries further includes a pressing assembly 7; the pressing component 7 is detachably arranged between the fixed frame 2 and the limiting plate 3; one end of the pressing component 7 is abutted against the positioning plate 4; one side of the compressing assembly 7, which is far away from the fixed frame, is abutted against the limiting plate 3; the pressing assembly 7 comprises a first pressing plate 71 and a second pressing plate 72 which have the same structure; the first pressing plate 71 and the second pressing plate 72 are disposed opposite to each other.
Referring to fig. 2 and 3, in the present embodiment, a first contour groove 711 is provided on a side of the first presser plate 71 close to the second presser plate 72; a second contour groove 721 is arranged on one side of the second pressing plate 72 close to the first pressing plate 71; the first profile groove 711 and the second profile groove 721 are both adapted to the square lithium battery a.
The sum of the depth of the first contour groove 711 and the depth of the second contour groove 721 is smaller than the thickness of the square lithium battery a, so that after the square lithium battery a is pressed and fixed by the first pressing plate 71 and the second pressing plate 72, a space for exposing the long side of the aluminum shell of the square lithium battery a is reserved between the first pressing plate 71 and the second pressing plate 72, and welding can be guaranteed.
Both ends of the first pressing plate 71 are provided with first connecting holes 712; both ends of the second pressing plate 72 are provided with second connection holes 722 adapted to the first connection holes 712. In this embodiment, the compression assembly 7 loaded with the lithium prismatic battery a may be preliminarily fixed by using a band or a shaft pin sequentially passing through the first coupling hole 712 and the second coupling hole 722 for easy handling and placement.
In this embodiment, when the long side of the aluminum case of the square lithium battery a is welded:
because the aluminum shell of the square lithium battery A is formed by connecting two aluminum plates, two long edges formed between the two aluminum plates need to be welded; firstly, a square lithium battery A to be welded is placed in the first contour groove 712 of the first pressing plate 71, and then the second pressing plate 72 is lightly covered on the side of the square lithium battery A away from the first pressing plate 71, at this time, the square lithium battery A is positioned between the first contour groove 711 and the second contour groove 721; then, a tie or a shaft pin sequentially penetrates through the first connecting hole 712 and the second connecting hole 722 to preliminarily fasten the first pressing plate 71 and the second pressing plate 72, so that the square lithium battery A is prevented from falling off from the pressing component 7 in the carrying process; vertically placing the compression assembly 7 loaded with the square lithium battery A to be welded between the fixing frame 2 and the limiting plate 3, tightly attaching one side of the compression assembly 7 to the limiting plate 3, and tightly attaching one end of the compression assembly 7 to the positioning plate 4; simultaneously starting the first pressing cylinder 5 and the second pressing cylinder 6 to press the pressing assembly 7, and further fixing the square lithium battery A; the height of the long side of the aluminum shell of the finally fixed square lithium battery A is straight, and the connection between the aluminum shells is compact and seamless; finally, after checking a gap between the two aluminum plates and impurities, welding the long side of the aluminum shell of the square lithium battery A by a laser welding method; in the same way, the other long edge of the aluminum shell of the square lithium battery A is also welded, after the welding is completed, the first pressing cylinder 5 and the second pressing cylinder 6 are closed, the first pressing plate 71 and the second pressing plate 72 are separated, and the long edge welding of the aluminum shell of the square lithium battery A is realized.
According to the square lithium battery welding tool clamp provided by the embodiment of the invention, the aluminum shell of the square lithium battery A is compressed through the effective matching between the first pressing plate 71 and the second pressing plate 72, so that the long side of the aluminum shell of the square lithium battery A is straight, the connection between the aluminum shells is compact and seamless, and no fire is exploded and no crack is generated during welding; simultaneously, the back is good in the welding of square lithium cell A's aluminum hull long side, and whole square lithium cell A is stereotyped, and then has guaranteed between square lithium cell A apron long side and the aluminum hull, between apron minor face and the aluminum hull all compact seamless, and high plane is straight. The square lithium battery is preliminarily fixed through the pressing component 7, the first pressing cylinder 5 and the second pressing cylinder 6 are used for applying the same pressure to the side face of the pressing component 7, the aluminum shell position balance of the square lithium battery A is further guaranteed, the position of a laser welding head is prevented from being adjusted at high frequency, and continuous laser welding is facilitated.
Example 2:
as shown in fig. 4, the welding fixture for a square lithium battery according to the embodiment of the present invention is used for clamping and fixing a square lithium battery a, and includes a substrate 1, a fixing frame 2, a limiting plate 3, and a positioning plate 4; the fixed frame 2, the limiting plate 3 and the positioning plate 4 are all arranged on the base plate 1; one side of the positioning plate 4 is connected with one end of the limiting plate 3, and the other side of the positioning plate is opposite to one end of the fixing frame 2; the fixing frame 2 comprises a first baffle plate 21, a second baffle plate 22 and a fixing plate 23; the first baffle plate 21 and the second baffle plate 22 are arranged on the substrate 1 in parallel; one end of the fixing plate 23 is arranged at the top of the first baffle plate 21, and the other end is arranged at the top of the second baffle plate 22; one side of the first baffle plate 21 is opposite to one side of the positioning plate 4 far away from the limiting plate 3; a plurality of first pressing cylinders 5 and a plurality of second pressing cylinders 6 are arranged between the fixing plate 23 and the substrate 1; the first pressing cylinder 5 is arranged on the fixing plate 23; the second pressing air cylinder 6 is arranged on the substrate 1; the first pressing air cylinders 5 correspond to the second pressing air cylinders 6 one by one.
The square lithium battery welding tool clamp further comprises a supporting plate 81, a first pole positioning block 82, a side plate 83, a pressing strip 84 and a third pressing cylinder 85; the supporting plate 81 is arranged on one side of the fixing plate 23 away from the substrate 1; one end of the supporting plate 82 is abutted against the positioning plate 4; one side of the supporting plate 81 abuts against the limiting plate 3; the first pole positioning block 82 is arranged on one side of the supporting plate 81 far away from the substrate 1; one end of the first pole positioning block 82 abuts against the positioning plate 4, and the other end abuts against a pole of the square lithium battery A; the side plate 83 is arranged at one end of the supporting plate 81 far away from one side of the limiting plate 3; one end of the pressing bar 84 is arranged at the top of the side plate 83, and the other end is arranged at the top of the limiting plate 3; the bottom of the pressing strip 83 abuts against the aluminum shell of the square lithium battery A; the third pressing cylinder 85 is disposed at one end of the supporting plate 81 far away from the first pole positioning block 82.
Referring to fig. 5, in this embodiment, one end of the first pole positioning block 82, which is far away from the positioning plate 4, is provided with a first concave 821; the first concave 821 is matched with the pole of the square lithium battery A. In the process of welding the long sides of the aluminum shell and the cover plate, the first concave 821 can effectively protect the negative electrode pole and the positive electrode pole of the square lithium battery A from being burned or welded by laser.
In this embodiment, when welding square lithium battery A's aluminum hull and apron long limit:
the cover plate of the square lithium battery A comprises an anode cover plate and a cathode cover plate, wherein the anode cover plate and the cathode cover plate are both provided with two long edges. When the long side of the negative electrode cover plate and the aluminum shell are welded, firstly, the square lithium battery A is placed on the supporting plate, and the negative electrode pole of the negative electrode cover plate is placed on the first concave 821 of the first pole positioning block 82; then, the third pressing cylinder 85 is started to press one end of the positive cover plate of the square lithium battery A, and the pressing bar 84 is pressed on the surface plane (one end close to the negative pole) of the aluminum shell of the square lithium battery A by screws; after the square lithium battery A is fixed, welding the long edge of the negative cover plate and the aluminum shell by laser welding; because four long sides need to be welded, after one side is welded, the third pressing cylinder 85 needs to be closed and the pressing bar 84 needs to be opened, so that the square lithium battery a can be conveniently turned over correspondingly until the welding of the aluminum shell and the long side of the cover plate is completed.
According to the welding tool clamp for the square lithium battery, provided by the embodiment of the invention, the first concave 821 is arranged on the first pole positioning block 82, so that the negative pole and the positive pole of the square lithium battery A can be effectively protected when the long sides of the aluminum shell and the cover plate are welded, and unnecessary burning or welding damage in the welding process is avoided. The square lithium battery A is completely fixed by the third pressing cylinder 85 and the pressing strip 84, so that the square lithium battery A is prevented from shifting during welding, the welding accuracy and stability are improved, and the welding safety is also improved.
Example 3:
as shown in fig. 6, the welding fixture for a square lithium battery according to the embodiment of the present invention is used for clamping and fixing a square lithium battery a, and includes a substrate 1, a fixing frame 2, a limiting plate 3, and a positioning plate 4; the fixed frame 2, the limiting plate 3 and the positioning plate 4 are all arranged on the base plate 1; one side of the positioning plate 4 is connected with one end of the limiting plate 3, and the other side of the positioning plate is opposite to one end of the fixing frame 2; the fixing frame 2 comprises a first baffle plate 21, a second baffle plate 22 and a fixing plate 23; the first baffle plate 21 and the second baffle plate 22 are arranged on the substrate 1 in parallel; one end of the fixing plate 23 is arranged at the top of the first baffle plate 21, and the other end is arranged at the top of the second baffle plate 22; one side of the first baffle plate 21 is opposite to one side of the positioning plate 4 far away from the limiting plate 3; a plurality of first pressing cylinders 5 and a plurality of second pressing cylinders 6 are arranged between the fixing plate 23 and the substrate 1; the first pressing cylinder 5 is arranged on the fixing plate 23; the second pressing air cylinder 6 is arranged on the substrate 1; the first pressing air cylinders 5 correspond to the second pressing air cylinders 6 one by one.
The square lithium battery welding tool clamp further comprises a second pole positioning block 9; the second pole positioning block 9 is arranged on one side of the limiting plate 3 close to the fixed frame 2; one end of the second pole positioning block 9 abuts against the positioning plate 4, and the other end of the second pole positioning block abuts against a pole of the square lithium battery A.
Referring to fig. 7, in the present embodiment, a second concave 91 is disposed at an end of the second pole positioning block 9 away from the positioning plate 4; the second indent 91 is adapted to the pole of the square lithium battery a. When the short sides of the aluminum shell and the cover plate are welded, the second inner recess 91 can effectively protect the negative pole column and the positive pole column of the square lithium battery from being burned or welded by laser.
In this embodiment, when welding square lithium cell A's aluminum hull and apron minor face:
the cover plate of the square lithium battery A comprises an anode cover plate and a cathode cover plate, wherein the anode cover plate and the cathode cover plate are respectively provided with two short edges. When the short edge of the negative electrode cover plate and the aluminum shell are welded, firstly, a square lithium battery A is placed between the fixing frame 2 and the limiting plate 3, one side of the square lithium battery A is abutted against the limiting plate 3, a negative electrode pole of the negative electrode cover plate is placed on the second inner recess 91 of the second pole positioning block 9, then, the first pressing cylinder 5 and the second pressing cylinder 6 are simultaneously started, and the square lithium battery A is pressed and fixed; after the square lithium battery A is fixed, welding the short edge of the negative cover plate and the aluminum shell by laser welding; because four short sides need to be welded, after each short side is welded, the first pressing cylinder 5 and the second pressing cylinder 6 need to be closed, and the square lithium battery A is correspondingly turned over until the welding between the short sides of the aluminum shell and the cover plate is completed.
According to the welding tool clamp for the square lithium battery, provided by the embodiment of the invention, the second indent 91 is formed in the second pole positioning block 9, so that the negative pole column and the positive pole column of the square lithium battery A can be effectively protected when the short sides of the aluminum shell and the cover plate are welded, and unnecessary burning or welding damage in the welding process is avoided.
In the welding process of the whole square lithium battery A, the welding process comprises the welding of an aluminum shell and the aluminum shell, the welding of the aluminum shell and the long side of a cover plate and the welding of the aluminum shell and the short side of the cover plate, and the pressing assembly 7, the first pole positioning block 82 and the second pole positioning block 9 all play a role in protecting important parts such as a liquid injection hole in the cover plate.
According to the welding tool clamp for the square lithium battery, which is provided by the embodiment of the invention, most parts are made of aluminum metal materials, and the parts used in places with serious welding heating can be made of copper metal materials or other heat-resistant metal materials.
According to the invention, all sides (including the long side of the aluminum shell, the long side and the short side of the positive and negative cover plates and the like) of the square lithium battery A can be welded on the same tool clamp, so that the three-dimensional welding of the square lithium battery A is realized; and the welding position has no gap, so that the problems of welding, fire explosion, cracks and the like can be avoided, the welding is convenient and quick, the utilization rate is high, and the welding device can be suitable for welding longer, narrower and thinner square lithium batteries A.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110476581.6A CN113134701B (en) | 2021-04-29 | 2021-04-29 | Square lithium battery welding fixture |
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| CN202110476581.6A CN113134701B (en) | 2021-04-29 | 2021-04-29 | Square lithium battery welding fixture |
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| CN113134701A true CN113134701A (en) | 2021-07-20 |
| CN113134701B CN113134701B (en) | 2025-07-25 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114434030A (en) * | 2022-03-22 | 2022-05-06 | 苏州天脉导热科技股份有限公司 | Thin uniform temperature plate laser welding sealing jig and welding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114260638A (en) * | 2021-12-22 | 2022-04-01 | 苏州东风精冲工程有限公司 | Rotary welding and pressing device for bipolar plate of hydrogen fuel cell |
| CN114260638B (en) * | 2021-12-22 | 2023-12-15 | 苏州东风精冲工程有限公司 | Hydrogen fuel cell bipolar plate rotary welding compacting device |
| CN114434030A (en) * | 2022-03-22 | 2022-05-06 | 苏州天脉导热科技股份有限公司 | Thin uniform temperature plate laser welding sealing jig and welding method |
| CN115355858A (en) * | 2022-08-16 | 2022-11-18 | 庐江力翔电池科技有限责任公司 | Aluminum hull oral area size measurement restraint frock |
| CN116864814A (en) * | 2023-03-28 | 2023-10-10 | 芜湖天弋能源科技有限公司 | Method for improving surface depression of battery cell |
| CN116864814B (en) * | 2023-03-28 | 2026-07-14 | 芜湖天弋能源科技有限公司 | Method for improving surface depression of battery cell |
| CN116511713A (en) * | 2023-06-28 | 2023-08-01 | 苏州中科瑞龙科技有限公司 | Battery welding jig |
| CN116511713B (en) * | 2023-06-28 | 2023-10-24 | 苏州中科瑞龙科技有限公司 | Battery welding jig |
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