CN220445521U

CN220445521U - Lug welding tool

Info

Publication number: CN220445521U
Application number: CN202321746479.4U
Authority: CN
Inventors: 杨昆鹏; 陈凯; 冯玉川; 李峥; 何泓材
Original assignee: Chengdu Qingtao New Energy Technology Co ltd
Current assignee: Chengdu Qingtao New Energy Technology Co ltd
Priority date: 2023-07-05
Filing date: 2023-07-05
Publication date: 2024-02-06
Anticipated expiration: 2033-07-05

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a tab welding tool. This utmost point ear welding frock includes electric core fixing device, and electric core fixing device is used for the electric core of fixed battery, and electric core fixing device has seted up the welding groove, is provided with first location depression bar and second location depression bar in the welding groove, and first location depression bar and second location depression bar all extend along the width direction of electric core, and the utmost point ear can be pushed down to the second location depression bar to make the utmost point ear form the radian, first location depression bar can flatten the front portion of utmost point ear. The second positioning compression bar is arranged in the welding groove, so that the electrode lugs are prevented from being broken due to vibration in the welding process; the tab pin can not break in the bending process. The front end of the tab can be pressed and fixed through the first positioning pressing rod, so that the tab is prevented from being swayed in the welding process to cause cold joint, the defect caused by unstable welding is prevented, the welding efficiency is improved, and the welding process of the battery is facilitated to be simplified.

Description

Lug welding tool

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a tab welding tool.

Background

The lithium ion battery is a power supply for providing power source for the power tool, has the advantages of long service life, practicability, safety, large capacity, small volume, light weight and the like, is widely applied to a plurality of fields, and is widely applied to life as one of new energy sources.

In the prior art, in the manufacturing process of the lithium ion battery, the self-carried tab and the tab pin of the battery core are required to be welded, namely, the positive electrode tab and the positive electrode tab pin of the battery core are welded, and the negative electrode tab pin of the battery core are welded. In the welding process, high-frequency mechanical vibration generated by welding transmits energy to a workpiece interface, and in the high-frequency vibration process, pole pieces are stretched and too tightly to easily cause pole lug breakage. After the tab is welded on the tab pin, the pin part is folded. The process of turning over the pin, the tab pin can lead to the fact to the tab to drag to lead to the fact electric core tab fracture, influence welding quality and the yield of electric core, the uniformity of electric core can not be ensured, causes the waste of material simultaneously.

Therefore, there is a need for a tab welding tool to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a tab welding tool which can press a tab to a certain radian, can provide a displacement space for longitudinal deformation generated by the tab, and can prevent the tab from being broken due to vibration in the welding process; when the lug pins are folded, the radian of the lug pressed down by the baffle rod in the welding process has a certain extension length, and the lug cannot be broken in the bending process.

In order to achieve the above object, the following technical scheme is provided:

the utility model provides a utmost point ear welding frock, includes electric core fixing device, electric core fixing device is used for the electric core of fixed battery, electric core fixing device has seted up the welding groove, be provided with first location depression bar and second location depression bar in the welding groove, first location depression bar reaches the second location depression bar is all followed the width direction of electric core extends, the utmost point ear can be pushed down to the second location depression bar, so that the utmost point ear forms the radian, first location depression bar can with the front portion of utmost point ear flattens.

As an optimal scheme, the number of the battery cell fixing devices is two, and the two battery cell fixing devices are arranged symmetrically up and down.

Preferably, one side of each of the two battery cell fixing devices is connected through a hinge.

Preferably, locking devices are arranged on the sides, opposite to the hinge, of the two battery cell fixing devices, and the locking devices can enable the two battery cell fixing devices to be switched between a locking state in which the two battery cell fixing devices are buckled with each other and an unlocking state in which the two battery cell fixing devices are separated from each other.

Preferably, the locking device includes:

the protruding structure is arranged on one of the two battery cell fixing devices;

the groove structure is arranged on the other one of the two battery cell fixing devices, and the protruding structure can be in plug-in fit with the groove structure so that the two battery cell fixing devices can be switched between the locking state and the unlocking state.

As a preferable scheme, the first positioning compression bar and the second positioning compression bar are both cylindrical structures.

As a preferable scheme, the first positioning compression bar and the second positioning compression bar are made of metal materials.

Preferably, the cell fixing device is made of an insulating material.

Preferably, the cell fixing device is made of wood materials.

Preferably, the cell fixing device is made of plastic.

Compared with the prior art, the utility model has the beneficial effects that:

the tab welding tool comprises a battery cell fixing device, wherein the battery cell fixing device is used for fixing a battery cell of a battery, a welding groove is formed in the battery cell fixing device, a first positioning pressure rod and a second positioning pressure rod are arranged in the welding groove, the first positioning pressure rod and the second positioning pressure rod extend along the width direction of the battery cell, the second positioning pressure rod can press down the tab to enable the tab to form an arc, and the first positioning pressure rod can flatten the front portion of the tab. Through setting up the second location depression bar in the welding groove, after the electric core is put into electric core fixed dress, the utmost point ear is pushed down by the second location depression bar and forms certain radian, on the one hand, can provide the displacement space for the longitudinal deformation that utmost point ear self produced, can prevent that utmost point ear from being broken because of vibration causes in the welding process; on the other hand, when the tab pin is folded, the radian of the tab pressed down by the second positioning pressing rod in the welding process is extended to a certain extent, and the tab cannot be broken in the bending process. In addition, when the tab welding fixture is used, the tab welding fixture is placed on the working platform, the front end of the tab can be pressed and fixed through the first positioning pressing rod and the working platform, the tab is prevented from being subjected to cold welding caused by shaking in the welding process, the defect caused by unstable welding is prevented, the structural design is scientific, the welding efficiency is improved, the welding process of a battery is facilitated to be simplified, the production cost of the battery is reduced, and the assembly quality of the battery is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural diagram of a tab welding tool according to an embodiment of the present utility model;

FIG. 2 is a second schematic structural diagram of a tab welding tool according to the first embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a tab welding tool according to a second embodiment of the present utility model.

Reference numerals:

100. welding a tab;

10. the battery cell fixing device; 11. a welding groove;

20. a first positioning compression bar;

30. a second positioning compression bar;

40. a hinge;

50. a locking device.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, the terms "upper," "lower," "left," "right," and the like are used for convenience of description and simplicity of operation based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Example 1

In order to solve the above-mentioned problems, as shown in fig. 1-2, the present embodiment provides a tab welding fixture 100, where the tab welding fixture 100 includes a cell fixing device 10, the cell fixing device 10 is used for fixing a cell of a battery, the cell fixing device 10 is provided with a welding groove 11, a first positioning compression bar 20 and a second positioning compression bar 30 are disposed in the welding groove 11, the first positioning compression bar 20 and the second positioning compression bar 30 extend along a width direction of the cell, and the second positioning compression bar 30 can press a tab to form an arc for the tab, and the first positioning compression bar 20 can flatten a front portion of the tab.

According to the tab welding tool 100, the second positioning compression rod 30 is arranged in the welding groove 11, after the battery cell is fixedly arranged in the battery cell, the tab is pressed down by the second positioning compression rod 30 to form a certain radian, on one hand, a displacement space can be provided for longitudinal deformation generated by the tab, and the tab is prevented from being broken due to vibration in the welding process; on the other hand, when the tab pin is folded, the arc of the tab pressed down by the second positioning pressing rod 30 extends to a certain extent, so that the tab cannot be broken in the bending process. In addition, when the tab welding tool 100 is used, the tab welding tool is placed on a working platform, the front end of the tab can be pressed and fixed through the first positioning pressing rod 20 and the working platform, the tab is prevented from being subjected to cold welding caused by shaking in the welding process, the defect caused by unstable welding is prevented, the structural design is scientific, the welding efficiency is improved, the welding process of a battery is facilitated to be simplified, the production cost of the battery is reduced, and the assembly quality of the battery is improved.

It should be noted that, the welding mode adopted in the lug welding of this embodiment is ultrasonic welding, and ultrasonic welding has advantages such as the cost is lower, clean pollution-free, can not harm the work piece, welding process is stable. In other embodiments, the welding manner of the tab may also be a welding manner such as laser welding or arc welding, where the welding manner is a tab welding manner well known to those skilled in the art, and the welding manner of the tab is not limited in this application, and a producer may also perform conventional replacement on the welding manner of the tab according to actual production experience, which is not limited herein.

Further, the welding grooves 11 are formed at two ends of the cell fixing device 10 along the length direction, one of the welding grooves 11 formed at two ends of the cell fixing device 10 is used for welding the positive electrode tab and the positive electrode tab pin, and the other is used for welding the negative electrode tab and the negative electrode tab pin. In other embodiments, two welding slots 11 may be further disposed at any other two ends of the cell fixing device 10, and may be adaptively adjusted according to the specific positions of the tabs of the cells to be welded.

Further, as shown in fig. 2, the number of the battery cell fixing devices 10 is two, the two battery cell fixing devices 10 are arranged symmetrically up and down, and can be fixed to the battery cell from the upper side and the lower side of the battery cell respectively, so that the stability of fixing the battery cell is improved, the battery cell is prevented from shifting in the welding process of the tab, and the welding effect of the tab is prevented from being influenced.

Further, as shown in fig. 1 and fig. 2, one side of the two electric core fixing devices 10 is connected through the hinge 40, when in use, the hinge 40 is installed on one side of the two electric core fixing devices 10, so that the two electric core fixing devices 10 are rotationally connected, the electric core fixing devices 10 are opened or closed by installing opposite sides of the hinge 40, convenience in opening and closing the two electric core fixing devices 10 is improved, difficulty in buckling the two electric core fixing devices 10 is reduced, and difficulty in buckling the two electric core fixing devices 10 is further improved. The hinge 40 is a conventional one, and any conventional hinge 40 capable of achieving the above functions may be used in this embodiment.

Further, as shown in fig. 1 and 2, the sides of the two battery cell fixing devices 10 opposite to the hinge 40 are provided with locking devices 50, and the locking devices 50 can switch the two battery cell fixing devices 10 between a locked state in which the two battery cell fixing devices 10 are buckled with each other and an unlocked state in which the two battery cell fixing devices 10 are separated from each other. When the tabs are welded, the locking device 50 locks the two cell fixing devices 10 to each other, so that the two cell fixing devices are in a locking state, and the fixing effect of the cell fixing devices 10 on the cells is further improved.

Specifically, the locking device 50 includes a protrusion structure and a groove structure, the protrusion structure is disposed on one of the two cell fixing devices 10, the groove structure is disposed on the other of the two cell fixing devices 10, and the protrusion structure can be in plug-in fit with the groove structure, so that the two cell fixing devices 10 can be switched between a locking state and an unlocking state, and the quick locking and unlocking of the two cell positioning devices can be realized by setting the locking device 50 to be in plug-in fit with the groove structure, so that the welding efficiency of the tab is improved.

Preferably, the first positioning strut 20 and the second positioning strut 30 are both cylindrical structures. The first positioning compression bar 20 and the second positioning compression bar 30 with cylindrical structures can prevent the electrode lugs from being damaged when the electrode lugs are pressed.

Preferably, the first positioning strut 20 and the second positioning strut 30 are both made of metal materials. The surfaces of the first positioning compression bar 20 and the second positioning compression bar 30 which are made of metal materials are polished smoothly, so that on one hand, the first positioning compression bar 20 and the second positioning compression bar 30 can be further prevented from damaging the lugs; on the other hand, the smooth cylindrical metal material can also avoid the adhesion of the tab and the tab.

Preferably, the cell fixing device 10 is made of an insulating material, so as to prevent the battery cell from being damaged due to electrostatic breakdown of the pole piece of the battery cell. In other embodiments, the cell fixture 10 may also be made of an antistatic material.

Specifically, the battery cell fixing device 10 is made of a wood material, the wood material has good antistatic effect and corrosion resistance, the service life of the tab welding fixture 100 is prolonged, and meanwhile, the wood material is low in price, easy to obtain, and the production cost is reduced.

In other embodiments, the cell fixture 10 is made of plastic. For example, the material may be PET (polyethylene glycol terephthalate), PE (polyethylene), PP (polypropylene), PI (polyimide), or the like. The battery cell fixing device 10 made of the material has the advantages of high tensile strength, good insulating property and the like, and meanwhile, the use cost is low.

Example two

The tab welding tool 100 provided in this embodiment is substantially the same as that in the first embodiment, and the tab welding tool 100 disclosed in this embodiment is different from that in the first embodiment in that: the welding grooves 11 are provided at different positions.

As shown in fig. 3, in this embodiment, two welding slots 11 are formed at the same end of the battery core fixing device 10, and when two tabs of the battery core are disposed at the same end of the battery core, the tab welding tool 100 provided in this embodiment may be used to weld the tabs and tab pins.

Note that in the description of this specification, a description referring to terms "some embodiments", "other embodiments", and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing description is only of the preferred embodiments of the utility model and the technical principles employed. It will be understood by those skilled in the art that the present utility model 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 utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. The utility model provides a utmost point ear welding frock, its characterized in that, including electric core fixing device (10), electric core fixing device (10) are used for fixed battery's electric core, welding groove (11) have been seted up to electric core fixing device (10), be provided with first location depression bar (20) and second location depression bar (30) in welding groove (11), first location depression bar (20) with second location depression bar (30) are all followed the width direction of electric core extends, second location depression bar (30) can push down the utmost point ear, so that the utmost point ear forms the radian, first location depression bar (20) can with the front portion of utmost point ear flattens.

2. The tab welding fixture according to claim 1, wherein the number of the cell fixing devices (10) is two, and the two cell fixing devices (10) are arranged symmetrically up and down.

3. The tab welding fixture according to claim 2, wherein one side of two of the cell fixtures (10) are connected by a hinge (40).

4. A tab welding fixture according to claim 3, wherein the two cell fixing devices (10) are provided with locking devices (50) on opposite sides of the hinge (40), and the locking devices (50) can switch between a locking state in which the two cell fixing devices (10) are fastened to each other and an unlocking state in which the two cell fixing devices (10) are separated from each other.

5. The tab welding fixture according to claim 4, wherein the locking device (50) comprises:

the protruding structure is arranged on one of the two battery cell fixing devices (10);

the groove structure is arranged on the other one of the two battery cell fixing devices (10), and the protruding structure can be in plug-in fit with the groove structure so that the two battery cell fixing devices (10) can be switched between the locking state and the unlocking state.

6. The tab welding fixture of claim 1, wherein the first positioning strut (20) and the second positioning strut (30) are both cylindrical structures.

7. The tab welding fixture of claim 1, wherein the first positioning press rod (20) and the second positioning press rod (30) are both made of a metal material.

8. The tab welding fixture according to any one of claims 1-7, wherein the cell fixing device (10) is made of an insulating material.