CN220993246U

CN220993246U - Welding device and battery production equipment

Info

Publication number: CN220993246U
Application number: CN202420437062.8U
Authority: CN
Inventors: 卓雪松; 肖仲星; 杨宏锋
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-03-07
Filing date: 2024-03-07
Publication date: 2024-05-24
Anticipated expiration: 2034-03-07

Abstract

The application provides a welding device and battery production equipment, and belongs to the technical field of batteries. The welding device comprises: bonding tool and dust collector, dust collector includes: the pipe wall of the dust removing pipeline is provided with a dust removing port facing the welding head, the dust removing port of the dust removing pipeline at least partially surrounds the welding end face of the welding head, and the welding end face is the end face of the welding head for transmitting energy. The welding device provided by the embodiment of the application can improve the dust removal efficiency of the object to be welded.

Description

Welding device and battery production equipment

Technical Field

The application relates to the technical field of batteries, in particular to a welding device and battery production equipment.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

In the process of welding the battery, it is necessary to remove dust from the welded portion. If much dust remains at the welded part, the quality of the battery is affected.

Disclosure of utility model

The present application aims to solve at least one of the technical problems existing in the background art. Therefore, an object of the present application is to provide a welding device to improve the problem that the quality of the battery is affected by the residual dust at the welding position.

An embodiment of a first aspect of the present application provides a welding apparatus including a welding head and a dust removing device, the dust removing device including: the pipe wall of the dust removing pipeline is provided with a dust removing opening facing the welding head, the dust removing opening of the dust removing pipeline at least partially surrounds the welding end face of the welding head, and the welding end face is the end face of the welding head for transmitting energy.

According to the technical scheme provided by the embodiment of the application, the welding head can be used for welding an object to be welded, the dust removing port of the dust removing pipeline is used for removing dust, the dust removing pipeline is close to the welding head, and the dust removing port at least partially surrounds the welding head, so that the dust removing port is close to the welding head, dust generated at the welding head can be removed by the dust removing port in a short distance, and the dust removing force is enhanced. And the dust removal port surrounds the welding head, so that the dust removal area of the dust removal port to the welding head is larger, and the dust removal efficiency is improved.

In some embodiments, the dust removal pipe is looped, the weld head is located on one side of the dust removal pipe in an axial direction of the looped dust removal pipe, and the dust removal port extends in a circumferential direction of the dust removal pipe such that the dust removal port of the dust removal pipe at least partially surrounds the weld head. The annular dust removing pipeline can be well adapted to the shape of the welding head, so that the area of the dust removing port surrounding the welding head is larger, and the dust removing port has higher dust removing efficiency on the welding head.

In some embodiments, the dust removal conduit encloses a ring with a gap. The object to be welded can be positioned on one side of the annular dust removal pipeline through the notch, so that the dust removal opening surrounds the periphery of the object to be welded, and the object to be welded is efficiently removed.

In some embodiments, the height dimension of the dust removal port is less than the height dimension of the dust removal duct in the axial direction of the annular dust removal duct. The height of the dust removal opening is smaller, so that the airflow velocity passing through the dust removal opening is larger, and the dust removal efficiency is further improved.

In some embodiments, the dust removal port is disposed proximate a bottom of the dust removal conduit, the bottom of the dust removal conduit being proximate a welding end face of the welding head. The dust removal opening corresponds with the welding end face, so that dust generated at the welding end face of the dust removal opening is efficiently removed. And the welding end face is positioned at the bottom of the dust removing pipeline, so that the contact between the welding end face and an object to be welded is facilitated, and the object to be welded is welded.

In some embodiments, the interior of the entire dust removal conduit communicates. The air flow can circulate at each position of the dust removing pipeline, and the flow velocity of the air flow at different positions of the dust removing opening is balanced.

In some embodiments, the dust removal conduit comprises: the bending part and the two side parts connected with the opposite ends of the bending part are oppositely arranged, the bending part and the two side parts are encircled to form a ring shape, and the bending part and the two side parts are communicated with each other. Therefore, the ring-shaped structure with the notch can be formed, the object to be welded can be positioned on one side of the ring-shaped dust removing pipeline through the notch, and the dust removing port can be used for efficiently removing dust from the object to be welded.

In some embodiments, the interior of the dust removal conduit is divided into at least two sections that are independent of each other, the at least two sections including adjacent first and second sections, and the first and second sections are not in communication with each other. The air flow in the mutually independent parts in the dust removing pipeline does not circulate, so that dust can be removed from different positions respectively, and then the air flow rate of the mutually independent parts in the dust removing pipeline can be adjusted according to different dust removing requirements.

In some embodiments, the dust removal duct includes a plurality of sub dust removal ducts that are disposed independently of one another, the plurality of sub dust removal ducts being arranged in sequence and surrounding the weld head. The dust removing pipelines are spliced by a plurality of independent sub dust removing pipelines, so that the preparation difficulty of the dust removing pipelines can be reduced.

In some embodiments, the dust removal duct is provided with at least one extraction opening. The extraction opening can exhaust the dust removal pipeline, and then forms the negative pressure at the dust removal opening, and the dust removal opening adsorbs the dust of butt joint department through the negative pressure, is favorable to collecting the absorptive dust, reduces the dust and is blown away to everywhere probability.

In some embodiments, in the case of internal communication of the entire dust removal pipe, a plurality of extraction openings are provided on the dust removal pipe, the plurality of extraction openings being distributed on opposite sides of the dust removal pipe. Therefore, the plurality of extraction openings can respectively extract air from the two opposite sides of the dust removing pipeline, so that the negative pressures at different positions of the dust removing pipeline are balanced, and the flow velocity of air flow at different positions of the dust removing openings can be balanced.

In some embodiments, the wall of the dust removal conduit proximate the weld head includes a deflector portion that interfaces with the dust removal port, the deflector portion being inclined toward a side distal from the weld head. The airflow absorbed by the dust removing port is transmitted along the guide part, and the inclined guide part can play a role in buffering the airflow, so that the boundary layer absorption effect of dust carried in the airflow when the airflow turns is relieved.

In some embodiments, the dust removing device further comprises: at least one exhaust pipe, the exhaust pipe is connected in the extraction opening, and the exhaust pipe is used for exhausting to the dust removal pipeline. The exhaust pipe can be connected with an air exhaust device to exhaust air to the dust removing pipeline so that the dust removing pipeline forms negative pressure.

In some embodiments, the exhaust pipe has at least a first section with a gradually-changed pipe diameter, the first section is connected to the exhaust port, and the pipe diameter of the first section is gradually decreased along a direction away from the exhaust port. That is, the pipe diameter of the first section is in a decreasing trend along the air flow transmission direction in the exhaust pipe, so that the air flow velocity in the first section is gradually increased, and the dust removal efficiency is improved.

In some embodiments, the welding head is fixedly connected to the dust extraction device. Therefore, the dust removing device can move along with the welding head, and dust generated in the welding process can be removed in time in the process that the welding head welds an object to be welded or after the welding is finished.

In some embodiments, the welding apparatus further comprises: one end of the connecting piece is connected with the welding head, and the other end of the connecting piece is connected with the dust removing pipeline so as to enable the welding head to be fixedly connected with the dust removing device. Therefore, on one hand, the dust removing pipeline is firmly connected with the welding head, and on the other hand, the dust removing pipeline is connected through the connecting piece, so that the dust removing pipeline is convenient to detach.

In some embodiments, a top wall of a side of the dust removal conduit facing away from the welding end face of the welding head has a recess configured to mate with the welding head to enable the dust removal conduit to be fixedly mounted on the welding head. The concave part can provide an accommodating space for the welding head, so that the dust removing pipeline can be fixedly connected with the welding head.

In some embodiments, where the dust removal conduit encloses a ring with a gap, the recess is opposite the gap. The concave part is used for accommodating the welding head, namely the welding head is opposite to the concave part, and the concave part is opposite to the notch, so that the welding head is positioned at a position corresponding to the notch, and the contact between the welding head and the object to be welded is facilitated under the condition that the object to be welded is positioned at one side of the dust removal pipeline through the notch.

An embodiment of the second aspect of the present application provides a battery production apparatus including the welding device in the above embodiment. Because the dust removal pipeline is close to the welding head and the dust removal port at least partially surrounds the welding head, the dust removal port is close to the welding head, the area of the dust removal port surrounding the welding head is larger, the dust removal efficiency of dust at the welding position can be improved, and the quality of a battery can be improved in the welding procedure of the battery production process.

In some embodiments, the welding device is configured to weld the tab and the tab of the battery. When the welding head welds the lug and the adapter plate of the battery, the dust removal port can remove dust at the welding position in a larger range, so that the dust removal efficiency is improved, and the quality of the battery is improved.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily drawn to scale. It is appreciated that these drawings depict only some embodiments according to the disclosure and are not therefore to be considered limiting of its scope.

Fig. 1 is an exploded view of a battery according to some embodiments of the present application;

FIG. 2 is a schematic top view of a welding apparatus according to some embodiments of the present application;

FIG. 3 is a schematic diagram of a front view of a welding apparatus according to some embodiments of the present application;

FIG. 4 is a schematic diagram illustrating a state of welding a battery cell by a welding device according to some embodiments of the present application;

FIG. 5 is a schematic top view of a welding apparatus according to other embodiments of the present application;

FIG. 6 is a schematic front view of a welding device according to other embodiments of the present application;

FIG. 7 is a schematic view of a partial front view of a welding apparatus according to some embodiments of the present application;

FIG. 8 is a schematic view of a partial front view of a welding apparatus according to other embodiments of the present application;

FIG. 9 is a schematic top view of a welding apparatus according to still other embodiments of the present application;

FIG. 10 is a schematic diagram of a front view of a welding apparatus according to still other embodiments of the present application;

FIG. 11 is a schematic side view of a welding apparatus according to some embodiments of the application;

FIG. 12 is a schematic top view of a welding apparatus according to still other embodiments of the present application;

FIG. 13 is a schematic top view of a dust removal pipe fixedly connected to a welding head in a welding apparatus according to some embodiments of the present application;

FIG. 14 is a schematic view of a dust removing device and a welding head fixedly connected in a welding device according to some embodiments of the present application;

Fig. 15 is a schematic perspective view of a welding head in a welding apparatus according to some embodiments of the application.

Reference numerals illustrate:

A dust removal pipe 100;

Bonding tool 101, suction opening 102, flow guide 103, suction tube 104, first section 104a, second section 104b, third section 104c, recess 105, connector 106, second mounting hole 106a, mounting plate 107, first mounting hole 107a, bent portion 111, side portion 112;

transducer 50, amplitude transformer 51, cylinder 52, welding seat 53;

A portion 40 of the welding head having a larger dimension in the width direction, and a portion 41 of the welding head having a larger dimension in the length direction;

A welding end face 30, a side face 31 of the welding head, a top wall 32, a bottom wall 33, and side walls 34;

A dust removal port 20;

the battery cell 1, a main body part 11, a tab 12, an end cover 13 and a shell 14;

A first direction X, a second direction Y;

And an included angle theta between the flow guiding part and the bottom wall of the dust removing pipeline.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may 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 embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

The welding device has a welding head for transmitting energy to the object to be welded to weld the object to be welded. Taking ultrasonic welding as an example, the welding head can couple ultrasonic waves to an object to be welded, transmit the ultrasonic waves to the object to be welded, further generate high-frequency vibration on the surface of the object to be welded, and the object to be welded generates friction heat to be fused under the high-frequency vibration.

In the process of carrying out ultrasonic welding on the lug and the switching piece of the battery cell, the welding head transmits ultrasonic waves to the surface of the lug, and under the action of the ultrasonic waves, high-frequency vibration is generated between the lug and the switching piece, so that mutual friction heat generation is generated, and fusion of the lug and the switching piece is promoted.

Because of the high-frequency vibration of ultrasonic welding, more dust can be generated at the welding position of the object to be welded, and the performance of the object to be welded is influenced. For welding the tab and the tab, more metal chips are generated. Especially for the welding of multilayer tab, these metal fragments can get into the clearance between the multilayer tab, get into the inside of electric core easily, lead to the inside self discharge inefficacy that causes of electric core, perhaps cause the short circuit of battery, influence the performance of battery.

In order to reduce the influence of the foreign matters on the performance of the object to be welded, the dust removal device can be used for removing dust on the object to be welded, however, the dust removal efficiency of the existing dust removal device on the object to be welded is low, and the performance of the object to be removed cannot be guaranteed.

Based on the above consideration, in order to solve the problem of low dust removal efficiency of a welding part, the embodiment of the application designs a welding device, wherein a dust removal pipeline is close to a welding head, and a dust removal port at least partially surrounds the welding head, so that the dust removal port is close to the welding head, dust generated at the welding head can be removed by the dust removal port in a short distance, and the dust removal force is enhanced. And the dust removal port surrounds the welding head, so that the dust removal area of the dust removal port to the welding head is larger, and the dust removal efficiency is improved.

It will be appreciated that the welding apparatus according to the embodiments of the present application is not limited to being adapted for ultrasonic welding, but is also adapted for other welding modes.

The welding device disclosed by the embodiment of the application can be used for producing batteries, and the produced batteries can be used for electric devices such as vehicles, ships or aircrafts. The power supply system of the power utilization device can be composed of the battery and the like produced after the welding device disclosed by the embodiment of the application is used, so that the quality of the battery is improved, and the stability and the service life of the battery are improved.

The power device may be, but is not limited to, a cell phone, tablet, notebook computer, electric toy, electric tool, battery car, electric car, ship, spacecraft, etc. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

In the battery, a plurality of battery monomers can be connected in series or in parallel or in series-parallel connection, and the series-parallel connection means that the plurality of battery monomers are connected in series or in parallel. The plurality of battery monomers can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery monomers is accommodated in the box body; of course, the battery can also be in a form of a battery module formed by connecting a plurality of battery monomers in series or parallel or series-parallel connection, and then connecting a plurality of battery modules in series or parallel or series-parallel connection to form a whole body and accommodating the whole body in the box body. The battery may further include other structures, for example, a bus member for making electrical connection between the plurality of battery cells.

Wherein each battery cell may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped.

Referring to fig. 1, fig. 1 is an exploded view of a battery cell according to some embodiments of the present application. The battery cell refers to the smallest unit constituting the battery. As shown in fig. 1, the battery cell includes an end cap 13, a housing 14, a cell, and other functional components.

The end cap 13 refers to a member that is covered at the opening of the case 14 to isolate the inner environment of the battery cell from the outer environment. Without limitation, the shape of the end cap 13 may be adapted to the shape of the housing 14 to fit the housing 14. Optionally, the end cover 13 may be made of a material (such as an aluminum alloy) with a certain hardness and strength, so that the end cover 13 is not easy to deform when being extruded and collided, so that the battery unit can have higher structural strength, and the safety performance can be improved. The end cap 13 may be provided with functional parts such as electrode terminals. The electrode terminals may be used to electrically connect with the battery cells for outputting or inputting electric power of the battery cells. In some embodiments, the end cap 13 may also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell when the internal pressure or temperature reaches a threshold. The material of the end cap 13 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. In some embodiments, insulation may also be provided on the inside of the end cap 13, which may be used to isolate electrical connection components within the housing 14 from the end cap 13 to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.

The housing 14 is an assembly for mating with the end cap 13 to form the internal environment of the battery cell, where the internal environment formed may be used to house the cells, electrolyte, and other components. The case 14 and the end cap 13 may be separate components, and an opening may be provided in the case 14, and the interior of the battery cell may be formed by covering the opening with the end cap 13 at the opening. It is also possible to integrate the end cap 13 and the housing 14, but in particular, the end cap 13 and the housing 14 may form a common connection surface before other components are put into the housing, and when it is necessary to encapsulate the inside of the housing 14, the end cap 13 is then put into place with the housing 14. The housing 14 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 14 may be determined according to the specific shape and size of the cells. The material of the housing 14 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.

The cell is a component in which electrochemical reactions occur in the battery cell. One or more electrical cells may be contained within the housing 14. The battery cell is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally arranged between the positive electrode sheet and the negative electrode sheet. The portions of the positive electrode sheet and the negative electrode sheet having active material constitute the main body portion 11 of the cell assembly, and the portions of the positive electrode sheet and the negative electrode sheet having no active material constitute the tabs 12, respectively. The tab 12 may include a positive tab and a negative tab, which may be located at one end of the main body 11 or at two ends of the main body respectively. The tab 12 may be electrically connected to the electrode terminal through a switching tab, and the switching tab and the tab 12 may be electrically connected by welding. During charge and discharge of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab 12 is connected to the electrode terminal to form a current loop.

Referring to fig. 2 and 3, fig. 2 is a schematic top view of a welding device according to some embodiments of the present application, and fig. 3 is a schematic front view of the welding device according to some embodiments of the present application.

An embodiment of the present application provides a welding apparatus including a welding head 101 and a dust removing device, the dust removing device including: dust removing duct 100 is disposed adjacent to bonding tool 101, the wall of dust removing duct 100 having dust removing port 20 opening toward bonding tool 101, dust removing port 20 of dust removing duct 100 at least partially surrounding bonding tool 101.

Referring to fig. 2 and 3, welding head 101 has a welding end face 30, and a side face 31 of the welding head that meets the outer periphery of welding end face 30, welding end face 30 referring to the end face of welding head 101 that is used to emit energy. For the purposes of ultrasonic welding, bonding tool 101 refers to the end face of the emitting end that emits ultrasonic energy. During the welding process, the welding end face 30 is in contact with the surface of the object to be welded, so that ultrasonic waves emitted by the welding end face 30 can be conducted to the welding interface. The welding interface referred to herein is a contact interface when the welding end face 30 is in contact with an object to be welded.

In some embodiments, the dust port 20 may surround the side 31 of the weld head to avoid impeding the propagation of energy emitted at the weld end face 30.

In some embodiments, dust port 20 may partially surround bonding tool 101. For example, the side 31 of the weld head may be partially surrounded.

In some embodiments, dust port 20 may also surround the entire welding head 101. For example, the entire weld head side 31 may be encircled.

In some embodiments, the dust port 20 of the dust removal duct 100 may at least partially surround the welding end face 30 of the welding head 101, the welding end face 30 being the end face of the welding head for transmitting energy.

It will be appreciated that more dust is generated at the welding interface where the welding end face 30 contacts with the object to be welded, so the dust removing opening 20 can encircle the periphery of the welding end face 30, so that the dust removing area of the welding interface of the dust removing opening 20 is larger, more dust at the welding interface can be removed, and the dust removing efficiency of the welding site is improved.

In some embodiments, the dust removing device may further include: transducer, amplitude transformer, cylinder and welding seat. Wherein, the end of the amplitude transformer far away from the welding end face 30 of the welding head 101 is connected, the air cylinder is connected with the end of the amplitude transformer far away from the welding end face 30, the transducer is connected with the amplitude transformer, and the welding seat is arranged opposite to the welding end face 30 on one side of the welding head 101 far away from the amplitude transformer.

The transducer converts electrical power into ultrasonic waves and transmits the ultrasonic waves into the horn.

The horn expands or contracts the received ultrasonic waves and transmits them into horn 101.

The holder is used for supporting an object to be welded, the welding head 101 moves toward the holder under the action of the cylinder to clamp the object to be welded between the holder and the welding head 101, and the welding head 101 transmits ultrasonic waves to the object to be welded.

Thus, welding head 101 is capable of welding an object to be welded, dust removal port 20 of dust removal pipe 100 is used for removing dust, dust removal pipe 100 is close to welding head 101 and dust removal port 20 at least partially surrounds welding head 101, so that dust removal port 20 is close to welding head 101, dust generated at welding head 101 can be removed by dust removal port 20 in a short distance, and dust removal strength is enhanced. And the dust removing opening 20 surrounds the welding head 101, so that the dust removing area of the dust removing opening 20 to dust at the welding head 101 is larger, and the dust removing efficiency is improved.

According to some embodiments of the present application, dust removing pipe 100 is enclosed in a ring shape, bonding tool 101 is located on one side of dust removing pipe 100 in the axial direction of ring-shaped dust removing pipe 100, and dust removing port 20 extends in the circumferential direction of dust removing pipe 100, so that dust removing port 20 of dust removing pipe 100 at least partially surrounds bonding tool 101.

Bonding tool 101 may be positioned on a side of dust removal conduit 100 near the center of the ring such that ring shaped dust removal conduit 100 at least partially surrounds bonding tool 101.

In some embodiments, welding end face 30 of bonding tool 101 is positioned at an axially-directed end of annular dust removal conduit 100, and dust removal conduit 100 surrounds the sides of bonding tool 101, thereby enabling exposure of welding end face 30, facilitating emission of energy for welding by welding end face 30 to the object to be welded.

The dust removing port 20 extends along the circumferential direction of the annular dust removing pipe 100, so that the shape enclosed by the dust removing port 20 is matched with the shape enclosed by the dust removing pipe 100. In this way, dust removing port 20 can surround welding head 101, the area opposite to welding head 101 is large, and the air flow at dust removing port 20 can directly act on welding head 101 opposite to the area, so that the dust removing area of dust removing port 20 to welding head 101 is increased, and the dust removing efficiency is improved.

In some embodiments, the cross-sectional shape of the dust removal conduit 100 may be any of circular, rectangular, or polygonal.

In some embodiments, dust removal conduit 100 may not be looped, but rather, dust removal port 20 may be shaped such that dust removal port 20 at least partially surrounds bonding tool 101. For example, dust removing duct 100 may be in the shape of a rectangular tube having a dust removing duct cutout on one side, the shape of the dust removing duct cutout matching that of bonding tool 101, and dust removing port 20 extending circumferentially of the dust removing duct cutout matching that of the dust removing duct cutout, and thereby being capable of partially surrounding bonding tool 101. In other embodiments, the shape of the dust removing duct 100 may be any shape with a dust removing duct notch on one side.

Annular dedusting duct 100 can better adapt to the shape of welding head 101 so that the area of dedusting port 20 surrounding welding head 101 is larger, thereby enabling dedusting port 20 to have higher dedusting efficiency for the dust at welding head 101.

According to some embodiments of the application, the dust removal conduit 100 encloses a ring with a gap.

By ring with a gap, it is meant that the ends of dedusting conduit 100 are not joined, and a non-closed ring is formed, such that dedusting conduit 100 partially surrounds bonding tool 101.

The dust removing opening 20 is located at the inner edge of the non-closed ring-shaped dust removing pipe 100, and extends along the circumferential direction of the non-closed ring-shaped dust removing pipe 100, so that the shape enclosed by the dust removing opening 20 is matched with the non-closed ring-shaped dust removing opening 20, i.e. the dust removing opening 20 also encloses a shape with a section of notch. In this manner, dust port 20 is caused to only partially surround bonding tool 101.

It should be noted that, the two ends of the dust removing pipe 100 are closed, so as to reduce or avoid leakage of the air flow in the dust removing pipe 100, and facilitate the air flow flowing at the dust removing opening 20 to take away dust.

When an object to be welded is welded, the welding head 101 is pressed down to the surface of the object to be welded, the object to be welded can enter the area surrounded by the non-closed annular dust removal pipeline 100 from the notch, the dust removal port 20 can also partially encircle the object to be welded, dust is removed from the object to be welded directly, and the dust removal efficiency is improved.

Referring to fig. 4, fig. 4 is a schematic view illustrating a state of welding a battery cell by a welding device according to some embodiments of the application.

In some embodiments, the object to be welded is a tab 12 of the battery cell, the tab 12 being located at an end of the body portion 11 of the battery cell. The tab 12 may have two opposing welding surfaces and four sides in different directions that meet the outer Zhou Jun of the two welding surfaces. One side surface of the tab 12 is connected to an end of the main body 11. When welding the tab 12, the welding end face 30 of the welding head 101 contacts with one welding face of the tab 12 to weld the tab 12, and the other welding face of the tab 12 is located on the welding seat. The tab 12 enters the area surrounded by the non-closed annular dust removing pipeline 100 from the notch, so that the dust removing opening 20 surrounds the three sides of the tab except the side connected with the main body 11, namely, three sides of the dust removing opening 20 surround the tab, thereby greatly increasing the dust removing area of the tab 12 and improving the dust removing efficiency of the tab 12.

In other embodiments, the dust removing pipe 100 may also be enclosed in a closed ring shape, and the dust removing port 20 extends along the circumferential direction of the closed ring-shaped dust removing pipe 100. The dust removing port 20 may be enclosed in a shape matching the closed ring-shaped dust removing duct 100, and specifically, the dust removing port 20 may be enclosed in a closed shape or may be enclosed in a non-closed shape.

The object to be welded can enter the area surrounded by the annular dust removing pipeline 100 through the notch, so that the dust removing opening 20 surrounds the periphery of the object to be welded, and the object to be welded is efficiently removed.

With continued reference to fig. 2 and 3, in accordance with some embodiments of the present application, the dust removal port 20 has a height dimension that is less than the height dimension of the dust removal duct 100 in the axial direction of the annular dust removal duct 100.

In the case where the unit length in the circumferential direction of the dust removing duct 100 is constant, the height dimension of the dust removing port 20 is smaller than the height dimension of the dust removing duct 100, which corresponds to the cross-sectional area of the dust removing port 20 in the axial direction of the annular dust removing duct 100 being smaller than the cross-sectional area of the dust removing duct 100 in the axial direction.

That is, the dust removing port 20 is a narrow opening provided on the wall of the dust removing pipe 100. When the air flow passes through the narrow dust removing port 20, the area of the air flow transmission passage becomes smaller, the flow velocity of the air flow increases, and more efficient dust removal can be achieved, compared to the air flow transmission in the dust removing duct 100.

In some embodiments, when positive pressure air is provided in dust removal duct 100, positive pressure is established at dust removal port 20 and an air flow is provided from dust removal port 20 to blow away dust from welding head 101 and the surface of the object to be welded. The larger the flow velocity of the air flow is, the more dust is blown away, and the dust removal efficiency is higher.

In some embodiments, when negative pressure is created in dust removal duct 100, a negative pressure air flow is created at dust removal port 20, and dust on bonding tool 101 and the object to be welded is attracted by the negative pressure air flow, and the air flow carrying the dust flows from dust removal port 20 into dust removal duct 100, thereby achieving dust removal. The greater the airflow velocity, the greater the strength of adsorption of dust, thereby enabling efficient removal of dust from bonding tool 101 and the object to be cleaned.

The dust removal mouth 20 is high less, can make the air current velocity of flow increase through dust removal mouth 20, further promotes dust removal efficiency.

With continued reference to fig. 2 and 3, in accordance with some embodiments of the present application, dust removal port 20 is positioned near the bottom of dust removal conduit 100, and the bottom of dust removal conduit 100 is near welding end face 30 of welding head 101, welding end face 30 being the end face of welding head 101 used to transfer energy.

When welding an object to be welded, welding head 101 is moved toward the object to be welded so that welding end face 30 is brought into contact with the surface of the object to be welded, and thereby ultrasonic waves can be emitted to the object to be welded. The welding end face 30 is close to the bottom of the dust removing pipe 100, and is convenient to contact with an object to be welded. The bottom of the dust removing pipe 100 is close to the welding end face 30 of the welding head 101, that is, the dust removing port 20 corresponds to the welding end face 30, so that dust at the welding interface can be removed more efficiently.

With continued reference to fig. 2 and 3, in some embodiments, the cross-sectional shape of the dust removal conduit 100 is polygonal. The walls of the dust removal pipe 100 may include: axially opposite top and bottom walls 32, 33 of the dust removing duct 100 in the shape of a ring, and opposite side walls 34 between the top and bottom walls 32, 33 and meeting both the top and bottom walls 32, 33, the bottom wall 33 being the bottom of the dust removing duct 100. The dust removal port 20 is disposed on a side surface of the dust removal pipe 100, which is close to the welding head 101, and the dust removal port 20 is further connected to the bottom wall 33 of the dust removal pipe 100, so that the dust removal port 20 is disposed close to the bottom of the dust removal pipe 100.

In some embodiments, the cross-sectional shape of the dust removal conduit 100 is circular. The dust removing pipe 100 may include: axially opposite highest points along the annular dust removal pipe 100 and lowest points, i.e. the bottom of the dust removal pipe 100. The dust removal port 20 is disposed on a pipe wall of the dust removal pipe 100 facing the welding head 101, and the dust removal port 20 is close to the lowest point of the dust removal pipe 100, so that the dust removal port 20 is disposed close to the bottom of the dust removal pipe 100.

In some embodiments, the dust removal port 20 may also be positioned near the top of the dust removal conduit 100.

In some embodiments, the dust removal port 20 may also be located anywhere between the top and bottom of the dust removal conduit 100.

The dust removing port 20 corresponds to the welding end face 30, so that the dust removing port 20 removes dust generated at the welding end face 30 with high efficiency. And the welding end face 30 is close to the bottom of the dust removing pipeline 100, so that contact between the welding end face 30 and an object to be welded is facilitated, and the object to be welded is welded.

According to some embodiments of the application, the interior of the entire dust removal conduit 100 communicates.

That is, the air flow can circulate throughout the dust removing duct 100.

The pipe wall of the dust removing pipe 100 is provided with a dust removing opening 20, namely the dust removing opening 20 is communicated with the inside of the dust removing pipe 100. The duct pressures at different locations within the dust removal duct 100 directly affect the airflow velocity and airflow pressure at the corresponding dust removal port 20, which in turn affects the dust removal efficiency of dust at the weld head 101 or on the object to be removed.

Under the condition that the whole dust removing pipeline 100 is internally communicated, air flows can circulate at different positions in the whole dust removing pipeline 100, so that pipeline pressure at different positions in the dust removing pipeline 100 is balanced, the flow speed of the air flows at different positions of the dust removing port 20 is balanced, and dust on the welding head 101 surrounded by the dust removing port 20 can be removed efficiently.

Referring to fig. 2, a dust removing pipe 100 according to some embodiments of the present application includes: the bending part 111 and two side parts 112 connected with opposite ends of the bending part 111, the two side parts 112 are oppositely arranged, the bending part 111 and the two side parts 112 are encircled to form a ring shape, and the bending part 111 and the two side parts 112 are communicated with each other.

Bending portion 111 bends relative to side portion 112, thereby enabling bending portion 111 and both side portions 112 to encircle bonding tool 101 in different directions. The ring formed by the bending part 111 and the two side parts 112 is a ring with a section of notch, the notch is positioned between the two side parts 112, and the bending part 111 is opposite to the notch.

In some embodiments, the bending portion 111 may be formed by sequentially connecting a plurality of sub-bending portions. Each sub-bending part extends along different directions, and an included angle larger than 90 degrees and smaller than 180 degrees is formed between the extending directions of the adjacent sub-bending parts.

In other embodiments, the bending portion 111 may be an integrally formed structure.

In some embodiments, the two sides 112 may extend in the same direction, i.e., the two sides 112 form a straight line.

In other embodiments, the ends of the two side portions 112 away from the bending portion 111 may also be bent toward the direction in which the two side portions 112 approach each other to form a nonlinear shape.

The shape of two sides 112 in embodiments of the present application includes, but is not limited to, those described above, and it is only necessary that two sides 112 and bend 111 be capable of encircling a ring with a gap and encircling bonding tool 101.

In some embodiments, the side portion 112 and the bent portion 111 may be joined by a welding process.

In some embodiments, the bending portion 111 is formed by sequentially connecting a plurality of sub-bending portions, and the plurality of sub-bending portions may be joined by a welding process.

The dust removing port 20 extends along the circumferential direction of the annular dust removing pipe 100 and spans the bending part 111 and the two side parts 112, and the shape of the dust removing port 20 is matched with the shape of the bending part 111 and the two side parts 112.

In some embodiments, the object to be welded is a tab of a battery cell. The three sides of the tab, excluding the side that is in contact with the main body, are respectively referred to as a first side, a second side, and a third side. The first surface is opposite to the main body, and the second surface and the third surface are respectively connected with two opposite sides of the first surface. When welding the tab, the tab enters the area surrounded by the non-closed ring-shaped dust removing pipe 100 from the notch, the first surface corresponds to the dust removing opening 20 of the bending part 111, and the second surface and the third surface correspond to the dust removing openings 20 of the two side parts 112 respectively. In this way, the dust removal openings 20 on the bending part 111 and the two side parts 112 respectively remove dust from the side surfaces of the tab in different directions.

The side portion 112 and the bending portion 111 are connected to form a ring shape with a notch, and the object to be welded can be positioned on one side of the ring-shaped dust removing pipe 100 through the notch, so that the dust removing port 20 can remove dust from the object to be welded efficiently.

According to some embodiments of the present application, the interior of the dust removal duct 100 is divided into at least two sections that are independent of each other, the at least two sections including adjacent first and second sections, and the first and second sections are not in communication with each other.

The dust removal port 20 is correspondingly arranged on the first part and the second part, namely the dust removal port 20 also comprises two parts which are respectively arranged on the first part and the second part, and the dust removal ports 20 corresponding to the first part and the second part are not communicated with each other.

That is, the duct pressures in the first and second portions can be controlled separately to control the airflow rates at the dust removal ports 20 corresponding to the first and second portions, respectively, to meet different dust removal requirements.

In some embodiments, the dust removal conduit 100 may be divided into a first portion and a second portion from a middle portion of the dust removal conduit 100. In this way, the gas circulation space in the first portion is made to be the same as or close to the gas circulation space in the second portion, and the problem that the dust removal pipe 100 vibrates or breaks due to an excessively large difference between the pipe pressure in the first portion and the pipe pressure in the second portion is improved.

In other embodiments, the dust removal pipe 100 may be divided into a first portion and a second portion from any position of the dust removal pipe 100, so as to meet different pipe pressures required by different dust removal requirements.

In some embodiments, the interior of the dust removal duct 100 may also be divided into three, four or more sections that are independent of each other, and different numbers of independent sections may be provided according to different dust removal requirements. It should be noted that, whether two or more parts, each independent part is provided with a dust removing opening 20, and the dust removing openings 20 of different parts are not communicated with each other.

In some embodiments, the separate portions of the dust removal conduit 100 may be separated by a partition, thereby providing for non-communication.

In some embodiments, the separate parts of the dust removing pipe 100 may be separate pipe structures with two closed ends, and the separate parts are welded to form the annular dust removing pipe 100.

The air flow in the mutually independent parts in the dust removing pipeline 100 does not circulate, so that dust can be removed at different positions respectively, and then the air flow speed of the mutually independent parts in the dust removing pipeline 100 can be adjusted according to different dust removing requirements, so that more efficient dust removal is realized.

According to some embodiments of the present application, dedusting conduit 100 comprises a plurality of sub dedusting conduits disposed independently of one another, which are arranged in sequence and around bonding tool 101.

The dust removing port 20 includes a plurality of sub dust removing ports provided independently of each other, and the plurality of sub dust removing ports are provided on the plurality of sub dust removing pipes, respectively, so that the plurality of sub dust removing ports surround the circumference of the welding head 101.

The two ends of each sub dust removing pipeline are of a closed structure, so that the pressure intensity in each sub dust removing pipeline is controlled, and the flow velocity of the corresponding sub dust removing port can be controlled.

The plurality of sub-dust removing pipes may not be connected to each other, and the plurality of sub-dust removing pipes may be surrounded around bonding tool 101 only by the arrangement of the positions.

In some embodiments, the plurality of sub-dust removal pipes may be closely arranged to form a continuous loop.

In other embodiments, a plurality of sub-dust removal conduits may also be spaced circumferentially about bonding tool 101.

In some embodiments, the number of sub-dust removal pipes may be two, three, four or more, and the number of sub-dust removal pipes may be adjusted according to different dust removal requirements.

The dust removing pipelines 100 are spliced by a plurality of independent sub dust removing pipelines, so that the preparation difficulty of the dust removing pipelines 100 can be reduced.

Referring to fig. 5, fig. 5 is a schematic top view of a welding apparatus according to other embodiments of the present application.

According to some embodiments of the present application, at least one extraction opening 102 is provided in the dust extraction duct 100.

The dust removing pipe 100 may be pumped through the pumping port 102 to form a negative pressure in the dust removing pipe 100, and thus a negative pressure is formed at the dust removing port 20 to adsorb dust.

In some embodiments, the welding end surface 30 is disposed near the bottom of the dust removing pipe 100, and the air extraction opening 102 may be disposed at the top of the dust removing pipe 100 far from the welding end surface 30, or may be disposed at a side of the dust removing pipe 100 far from the dust removing opening 20, and the air extraction opening 102 may also be disposed at the bottom of the dust removing pipe 100.

Specifically, in the case where the cross-sectional shape of the dust removing pipe 100 is polygonal, the pipe wall of the dust removing pipe 100 may include: top wall 32 and bottom wall 33, and two opposite side walls 34 between top wall 32 and bottom wall 33 and contiguous with both top wall 32 and bottom wall 33, are opposite each other in the axial direction of bonding tool 101, dust port 20 is located on side wall 34, and welded end face 30 of bonding tool 101 is located adjacent to bottom wall 33.

Then, in some embodiments, the extraction opening 102 may be provided in the top wall 32 of the dust removal duct 100. In other embodiments, the extraction opening 102 may be disposed on the other side wall 34 of the dust removing pipe 100 opposite to the side wall 34 where the dust removing opening 20 is disposed. In still other embodiments, the extraction opening 102 may also be provided in the bottom wall 33 of the dust extraction duct 100.

It will be appreciated that in some embodiments, the extraction port 102 may be only one. In the case that the air extraction openings 102 are only one, the air extraction openings 102 can be arranged at the middle position of the dust removing pipeline 100, so that the problem of unbalance of the dust removing pipeline 100 caused by overlarge pipeline pressure difference at two opposite sides of the dust removing pipeline 100 is solved.

In other embodiments, the number of extraction openings 102 may be plural, and the number of extraction openings 102 may be two, three, four, or more.

In some embodiments, the shape of the extraction opening 102 may be any of a circle, an ellipse, or a polygon.

The extraction opening 102 can extract air from the dust removing pipeline 100, so that negative pressure is formed at the dust removing opening 20, the dust removing opening 20 adsorbs dust at the welding head 101 through negative pressure, the adsorbed dust is favorably collected, and the probability that the dust is blown away everywhere is reduced.

According to some embodiments of the present application, in the case that the inside of the entire dust removing pipe 100 is communicated, a plurality of extraction openings 102 are provided on the dust removing pipe 100, and the plurality of extraction openings 102 are distributed on opposite sides of the dust removing pipe 100.

The opposite sides of the dust removing pipe 100 mean that the middle of the dust removing pipe 100 is defined and located at opposite sides of the middle.

In some embodiments, the dust removing pipe 100 includes a bending portion 111 and two side portions 112 connected to opposite ends of the bending portion 111, and the plurality of air extraction openings 102 may be distributed in the two side portions 112; or may be distributed at the junction of the bending portion 111 and the two side portions 112; or may be distributed at both ends of the bent portion 111.

When the dust removing pipe 100 is pumped through the pumping port 102, the air pressure in the pipe near the pumping port 102 of the dust removing pipe 100 is lower than the air pressure at the rest position. Therefore, if the air extraction openings 102 are distributed on the same side of the dust removal pipe 100 when the entire dust removal pipe 100 is connected, serious imbalance of air pressure in the dust removal pipe 100 may occur.

In some embodiments, the number of the air extraction openings 102 is an even number, and the number of the air extraction openings 102 distributed on two opposite sides of the dust removal pipe 100 is the same, so that the air pressure in the whole dust removal pipe 100 can be well balanced.

In some embodiments, the interior of the dust removing pipe 100 is divided into at least two independent parts, and the plurality of air extraction openings 102 may be respectively disposed in the plurality of independent parts, so that each air extraction opening 102 controls the air pressure in the independent part.

In some embodiments, the dust removing duct 100 includes a plurality of sub dust removing ducts that are disposed independently of each other, and the plurality of extraction openings 102 are disposed in the plurality of sub dust removing ducts, respectively.

It is not difficult to find that the plurality of air extraction openings 102 respectively extract air from two opposite sides of the dust removing pipeline 100, so that negative pressures at different positions of the dust removing pipeline 100 are balanced, and then the flow rates of air flows at different positions of the dust removing openings 20 can be balanced.

Referring to fig. 5 to 6, fig. 6 is a schematic front view of a welding device according to other embodiments of the present application.

According to some embodiments of the present application, the wall of dust removal conduit 100 adjacent to bonding tool 101 includes a deflector 103 that interfaces with dust port 20, deflector 103 being inclined toward the side remote from bonding tool 101.

The guiding part 103 is connected with the dust removing opening 20, so that the air flow transmitted through the dust removing opening 20 can be transmitted to the air extracting opening 102 along the guiding part 103 and then sent out from the air extracting opening 102.

The flow guiding part 103 may be located between the extraction opening 102 and the dust removing opening 20, and the flow guiding part 103 is connected to one side of the dust removing opening 20 in the height direction. The height direction referred to herein is the axial direction of the annular dust removal duct 100.

Deflector 103 may be inclined toward a side remote from bonding tool 101 by: the flow guiding part 103 is inclined compared with the plane of the dust removing opening 20 in the height direction.

Referring to fig. 7 to 8, fig. 7 is a schematic view illustrating a partial front view of a welding apparatus according to some embodiments of the present application, and fig. 8 is a schematic view illustrating a partial front view of a welding apparatus according to other embodiments of the present application.

As indicated by the arrows in fig. 7 and 8, the air flow, after entering the dust removal port 20, is transported along the flow guiding portion 103 until reaching the air extraction port 102. As shown in fig. 7, the air flow is perpendicular to the height direction of the dust removal opening 20 in the transmission direction of the dust removal opening 20, and the flow guiding portion 103 is located at one side of the dust removal opening 20 in the height direction.

As shown in fig. 7, if the plane of the flow guiding portion 103 is parallel to the plane of the height direction of the dust removing port 20 or the flow guiding portion 103 is inclined toward the direction of the welding head 101, the air flow direction transmitted by the dust removing port 20 forms an included angle of 90 ° or an included angle greater than 90 ° with the flow guiding portion 103, as indicated by the arrow in fig. 7. After entering the dust removal port 20, the air flow needs to change the direction of the air flow to be transmitted along the flow guiding portion 103, and needs to turn at 90 degrees or more than 90 degrees to be transmitted along the flow guiding portion 103.

When the airflow turns, a boundary layer adsorption effect is generated at the turning, namely the airflow tends to be adsorbed to the surface of the turning, so that dust carried in the airflow is deposited on the pipe wall. The excessive angle of the airflow turn may result in a more severe boundary layer adsorption effect.

Based on this, as shown in fig. 8, the embodiment of the present application sets the flow guiding portion 103 to incline toward the side far from the welding head 101, so that the angle of turning is smaller than 90 ° after the air flow enters the dust removing opening 20, as shown by the arrow in fig. 8, so that the angle of turning of the air flow is smaller, the adsorption effect of the boundary layer is relieved, and the deposition of dust on the wall of the dust removing pipe 100 is reduced.

In some embodiments, the angle between the surface of deflector 103 facing horn 101 and the plane of the height of dust port 20 may be greater than or equal to 25 ° and less than 90 °. In other words, the angle between the surface of deflector 103 remote from horn 101 and the direction of airflow at dust port 20 may be greater than 0 ° and less than or equal to 75 °.

Referring to fig. 6, in some embodiments, the cross-sectional shape of the dust removal conduit 100 is polygonal. The walls of the dust removal pipe 100 may include: axially opposed top and bottom walls 32, 33 of the annular dust removal duct 100, and opposed side walls 34 between the top and bottom walls 32, 33 and contiguous with both the top and bottom walls 32, 33. Extraction port 102 may be disposed in top wall 32 of dedusting conduit 100, and dedusting port 20 may be disposed in a side of dedusting conduit 100 facing bonding tool 101, with the side of dedusting port 20 facing bottom wall 33 of dedusting conduit 100 contacting bottom wall 33 of dedusting conduit 100. The air inlet direction of the dust removing opening 20 is a direction parallel to the plane of the pipe wall of the dust removing pipe 100.

The flow guiding part 103 extends from the top wall 32 of the dust removing pipe 100 to the dust removing opening 20, and is connected with one side of the dust removing opening 20 away from the bottom wall 33 of the dust removing pipe 100. Deflector 103 is inclined relative to bottom wall 33 of dusting tube 100 and is oriented away from bonding tool 101. The included angle theta between the flow guiding part and the bottom wall of the dust removing pipeline can be smaller than or equal to 75 degrees and larger than 0 degrees.

The air flow absorbed by the dust removing port 20 is transmitted along the guide part 103, and the inclined guide part 103 can buffer the air flow, so that the boundary layer absorption effect of dust carried in the air flow when the air flow turns is relieved.

Referring to fig. 9, fig. 9 is a schematic top view of a welding apparatus according to still another embodiment of the present application.

According to some embodiments of the application, the dust removing device further comprises: at least one exhaust pipe 104, the exhaust pipe 104 is connected to the exhaust port 102, and the exhaust pipe 104 is used for exhausting the dust removing pipeline 100.

The air extraction pipe 104 may be connected to an air extraction device, and the air extraction device is used to extract air from the air extraction opening 102, so that the dust removal pipeline 100 is in a negative pressure state.

The number of the air extraction pipes 104 is consistent with the number of the air extraction openings 102, so that each air extraction pipe 104 extracts air from the air extraction opening 102.

In some embodiments, the number of extraction ports 102 is one, and the number of extraction tubes 104 is one.

In some embodiments, the number of the suction openings 102 is plural, and the number of the suction pipes 104 is plural, and the plurality of suction pipes 104 corresponds to the plurality of suction openings 102 one by one.

The shape of the end face of the suction pipe 104 facing the suction port 102 matches the shape of the suction port 102, and may be, for example, any one of a circle, an ellipse, and a polygon.

The air exhaust pipe 104 can be connected with an air exhaust device to exhaust air from the dust removing pipeline 100 so as to enable the dust removing pipeline 100 to form negative pressure.

Referring to fig. 10 to 11, fig. 10 is a schematic front view of a welding apparatus according to still another embodiment of the present application, and fig. 11 is a schematic side view of a welding apparatus according to another embodiment of the present application.

According to some embodiments of the present application, the suction pipe 104 has at least a first section 104a with a gradually-changing pipe diameter, the first section 104a is connected to the suction port 102, and the pipe diameter of the first section 104a is gradually decreased along a direction away from the suction port 102.

The first section 104a extends in a direction away from the extraction opening 102. In some embodiments, the first segment 104a extends in a direction parallel to the axial direction of the annular dust extraction duct 100.

The cross-sectional area of the first section 104a gradually decreases in the direction along the air flow transport within the extraction duct 104. The cross-sectional area referred to herein refers to a cross-sectional area in a direction perpendicular to the flow direction of the air flow within the first section 104 a.

As the airflow is transported within the first section 104a, the transport passage area of the airflow gradually decreases, thereby increasing the flow velocity of the airflow in the first section 104 a.

In some embodiments, the pumping port 102 further has a second section 104b and a third section 104c connected in sequence, the second section 104b is connected to the first section 104a, the second section 104b extends along the same direction as the first section 104a, and the third section 104c is bent compared to the second section 104 b. The end of the third section 104c remote from the first section 104a is connected to an air extraction device.

The pipe diameter of the second section 104b may be constant and the pipe diameter of the third section 104c may be constant.

The direction of the third section 104c bending compared to the second section 104b can be adjusted according to different dust removal requirements, so that the air flow in the dust removal pipe 100 is sent out from the direction of the third section 104c bending.

In the direction along the air flow transmission in the exhaust pipe 104, the pipe diameter of the first section 104a is in a decreasing trend, so that the air flow velocity in the first section 104a is gradually increased, and the dust removal efficiency is improved.

According to some embodiments of the application, bonding tool 101 is fixedly coupled to a dust extraction device.

Bonding tool 101 has a fixed relative positional relationship with dust removing pipe 100, dust removing pipe 100 can move together with bonding tool 101, and welding end face 30 of bonding tool 101 is always facing dust removing port 20, and dust removing port 20 can remove dust from welding end face 30 at any time.

In some embodiments, welding end face 30 of bonding tool 101 is proximate to the bottom of dust removal conduit 100 and dust removal port 20 is proximate to the bottom of dust removal conduit 100. The dust removing port 20 surrounds the outer periphery of the welding end face 30, and the welding end face 30 is opposed to a gap between the top and bottom of the dust removing port 20 in the height direction. In this way, after the welding end face 30 contacts with the welding face of the object to be welded, the welding face is aligned with the gap between the top and the bottom of the dust removal port 20 in the height direction, and the dust removal port 20 is enabled to remove dust from the welding face with high efficiency.

The dust removing device can move along with the welding head 101, and can remove dust generated in the welding process in time during the welding process of the welding head 101 to the object to be welded or after the welding is finished.

Referring to fig. 12 to 14, fig. 12 is a schematic top view of a welding device according to still other embodiments of the present application, fig. 13 is a schematic top view of a dust removing pipe fixedly connected to a welding head in the welding device according to some embodiments of the present application, and fig. 14 is a schematic top view of a dust removing device fixedly connected to a welding head in the welding device according to some embodiments of the present application.

According to some embodiments of the application, the welding apparatus further comprises: and a connecting member 106, one end of connecting member 106 being connected to horn 101, and the other end of connecting member 106 being connected to dust removing pipe 100, so that horn 101 is fixedly connected to the dust removing device.

That is, bonding tool 101 is indirectly fixedly coupled to dedusting conduit 100.

In some embodiments, bonding tool 101 may be welded to bonding element 106, and bonding element 106 may be bolted to dedusting conduit 100, corresponding to a removable fixed connection between bonding tool 101 and dedusting conduit 100.

In other embodiments, bonding tool 101 may be bolted to connector 106, and connector 106 may be welded to dedusting conduit 100, allowing a removable, fixed connection between bonding tool 101 and dedusting conduit 100.

In still other embodiments, bolts are used between bonding tool 101 and bonding tool 106, and between bonding tool 106 and bonding tool 101, such that bonding tool 106 forms a releasable, secure connection with bonding tool 101, and bonding tool 106 forms a releasable, secure connection with dusting duct 100.

In still other embodiments, bonding between bonding tool 101 and bonding element 106, and bonding element 106 and bonding tool 101 are all connected by welding.

In some embodiments, one end of connector 106 may be connected to a side of bonding tool 101 and the other end may be connected to an end of dedusting conduit 100.

Referring to fig. 12 and 13, in some embodiments, the end of the dust removal duct 100 is provided with an outwardly extending mounting plate 107, the mounting plate 107 having a first mounting hole 107a therein. The end of connecting member 106 remote from bonding tool 101 has a second mounting hole 106a that mates with first mounting hole 107a. Fasteners pass through the first mounting holes 107a and the second mounting holes 106a to secure the connector 106 to the mounting plate 107.

Referring to fig. 13 and 14, in some embodiments, the number of connectors 106 may be two, with two connectors 106 each connected to a side of bonding tool 101 and extending in opposite directions. Two mounting plates 107 are provided at both ends of the dust removing pipe 100, and two connecting members 106 are connected to the two mounting plates 107, respectively, so as to fix the welding head 101 to the dust removing pipe 100.

In other embodiments, bonding tool 101 may be coupled to the dedusting apparatus in other ways, such as, for example, coupled to extraction tube 104. The manner in which bonding tool 101 is coupled to the dust extraction device in embodiments of the present application includes, but is not limited to, those described above, as long as bonding tool 101 is fixedly coupled to the dust extraction device.

Referring to fig. 14, in some embodiments, the dust removing device may further include: transducer 50, horn 51, cylinder 52, and weld holder 53. Wherein horn 51 is connected to an end of horn 101 remote from welding end face 30, cylinder 52 is connected to an end of horn 51 remote from horn 101, transducer 50 is connected to horn 51, and anvil 53 is located on a side of horn 101 remote from horn 51, opposite welding end face 30.

The holder 53 is used for supporting an object to be welded, the welding head 101 moves toward the holder 53 under the action of the cylinder to clamp the object to be welded between the holder 53 and the welding head 101, and the welding head 101 transmits ultrasonic waves to the object to be welded. The dust removal conduit is positioned around bonding tool 101 and moves with the bonding tool to remove dust generated during the welding process.

It is not difficult to find that the connection 106 is provided to connect the dust removing pipe 100 and the welding head 101, so that the connection between the dust removing pipe 100 and the welding head 101 is relatively stable on the one hand, and on the other hand, the connection is convenient to detach by the connection 106.

Referring to fig. 10-13, according to some embodiments of the application, top wall 32 of dedusting conduit 100 on a side facing away from the welding end face of bonding tool 101 has a recess 105, recess 105 configured to mate with bonding tool 101 to enable secure mounting of dedusting conduit 100 on bonding tool 101.

Referring to fig. 15, fig. 15 is a schematic perspective view of a welding head in a welding apparatus according to some embodiments of the present application.

Bonding tool 101 may include a top surface and a welding end surface 30 disposed opposite one another along the direction of extension of bonding tool 101 itself. The width and length of bonding tool 101 may each decrease in a stepwise manner in a direction along the top surface of bonding tool 101 toward welding end face 30. As used herein, the width of bonding tool 101 refers to the dimension of bonding tool 101 in a first direction X, and the length of bonding tool 101 refers to the dimension of bonding tool 101 in a second direction Y. The extension direction of bonding tool 101 is perpendicular to both first direction X and second direction Y, and first direction X is perpendicular to second direction Y. The direction of extension of bonding tool 101 is parallel to the direction of top wall 32 toward bottom wall 33 of dedusting duct 100.

That is, bonding tool 101 includes: a portion 40 having a larger size in the width direction and a portion having a smaller size in the width direction, and a portion 41 having a larger size in the length direction and a portion having a smaller size in the length direction. Wherein the smaller sized portion is disposed closer to the welding end face 30 than the larger sized portion, both in the width direction and in the length direction.

When bonding tool 101 is positioned on a side adjacent to dust removal conduit 100 and the side of bonding tool 101 in the width direction is opposite recess 105, recess 105 may be configured to receive a portion of bonding tool 101 having a larger dimension in the width direction, thereby preventing portion 40 of bonding tool having a larger dimension in the width direction from abutting the walls of dust removal conduit 100. In addition, since recess 105 may be used to accommodate a portion of bonding tool 101 having a larger dimension in the width direction, a portion of bonding tool 101 having a smaller dimension in the width direction may be disposed closer to the wall of dust removal pipe 100, thereby bringing dust removal port 20 closer to welding end face 30, and improving dust removal efficiency.

When bonding tool 101 is positioned on a side adjacent to dust removal conduit 100 and bonding tool 101 is opposite recess 105 on a lengthwise side, recess 105 may be configured to receive lengthwise larger portion 41 of bonding tool 101, thereby preventing lengthwise larger portion of bonding tool 101 from abutting the walls of dust removal conduit 100. In addition, because recess 105 may be configured to receive a portion of bonding tool 101 that is larger in length, a portion of bonding tool 101 that is smaller in length may be positioned closer to the wall of dust removal conduit 100, thereby allowing dust removal port 20 to be positioned closer to welding end face 30, and improving dust removal efficiency.

In some embodiments, where the interior of the entire dust removal duct 100 is in communication, the plurality of extraction openings 102 may be plural, and the plurality of extraction openings 102 may be distributed on opposite sides of the recess 105.

The pipe diameter of the pipeline position corresponding to the concave part 105 is smaller than the pipe diameters of other positions of the dust removing pipeline 100. Therefore, resistance to air flow transmission at the recess 105 is large. The air extraction openings 102 are distributed on two opposite sides of the recess 105, and can extract air from the recess 105 from two opposite sides of the recess 105, so that the air pressure in the recess 105 is balanced with the air pressure in other positions of the dust removal pipeline 100 as much as possible.

Recess 105 may provide a receiving space for bonding tool 101 to enable secure attachment of dedusting conduit 100 to bonding tool 101.

In accordance with some embodiments of the present application, in the case where the dust removing pipe 100 encloses a ring shape having a cut, the recess 105 is opposite to the cut.

Recess 105 is configured to receive a wider portion of bonding tool 101 such that bonding tool 101 is disposed opposite recess 105. Recess 105 is positioned opposite the indentation such that bonding tool 101 is opposite the indentation when bonding tool 101 is secured to dedusting conduit 100.

The object to be welded can enter the area surrounded by the annular dust removing pipeline 100 through the notch, so that the welding end face 30 of the welding head 101 is opposite to the welding face of the object to be welded, and the contact area between the welding end face 30 and the welding face of the object to be welded is larger, thereby being beneficial to improving the welding quality.

In addition, the notch corresponds to a middle position of the annular dust removing pipe 100, and the recess 105 is opposite to the notch, that is, the recess 105 is disposed at the middle position of the annular dust removing pipe 100. Under the condition that the inside of the whole dust removal pipeline 100 is communicated, the plurality of extraction openings 102 can be distributed on two opposite sides of the concave portion 105, and the sizes of pipeline spaces on two sides of the concave portion 105 are close to or even the same, so that the air pressure in the pipelines on two sides of the concave portion 105 is balanced, and the air pressure in the whole concave portion 105 can be balanced.

That is, recess 105 is opposite the notch such that bonding tool 101 is positioned at a location corresponding to the notch, facilitating contact of bonding tool 101 with the object to be welded where the object to be welded is positioned on one side of dust removal conduit 100 via the notch. In addition, the recess 105 may be provided at the middle position of the annular dust removal duct 100, and the air pressure in the entire recess 105 may be balanced.

The embodiment of the application also provides battery production equipment, which comprises the welding device in the embodiment.

The battery production equipment is used for producing batteries.

In some embodiments, the battery production apparatus may further include a cell winding apparatus and a shaping apparatus. In the production process of the battery, the positive and negative electrode plates are required to be cut to prepare electrode lugs, and then the positive and negative electrode plates and the diaphragm are wound into a battery core through battery core winding equipment. In the process such as dicing or winding, a large amount of foreign matter is generated on the cell surface and tab surface.

The shaping equipment is used for carrying out hot press shaping on the coiled battery cell, so that the inside of the battery cell is more compact, and the charging and discharging efficiency of the battery cell is improved. The existence of air in the battery cell can be reduced after the battery cell is compacted, and the fluctuation of the temperature in the battery cell is reduced, so that the stability and the safety of the battery cell are improved.

The welding equipment is used for welding the battery cells after the battery cells are subjected to hot press shaping.

Because the dust removal pipeline is close to the welding head and the dust removal port at least partially surrounds the welding head, the dust removal port is close to the welding head, the area of the dust removal port surrounding the welding head is larger, the dust removal efficiency of dust at the welding position of the lug can be improved, and the quality of the battery is improved in the welding procedure of the battery production process.

According to some embodiments of the application, the welding device is configured for welding the tab and the tab of the battery.

In the preparation process of the battery, the tab of the battery core and the adapter sheet are generally required to be welded, and after the battery is packaged, the adapter sheet is used as an electrode of the battery.

The tab is located at an end of the main body of the battery cell. The tab may have two opposing welding faces and four sides in different directions that meet the outer Zhou Jun of the two welding faces. One side surface of the tab is connected with the end part of the main body part. When the tab is welded, the welding end face of the welding head is contacted with one welding face of the tab so as to weld the tab, and the other welding face of the tab is positioned on the welding seat. The tab enters the area surrounded by the non-closed annular dust removal pipeline from the notch, so that the dust removal opening surrounds the tab on the other three sides except the side connected with the main body part, namely, the three sides of the dust removal opening surround the tab, the dust removal area of the tab can be further increased to the greatest extent, and the dust removal efficiency of the tab is improved.

The area that the dust removal mouth encircles the bonding tool is great, and when the bonding tool was welding the utmost point ear of battery and changeover piece, the dust removal mouth can remove dust in the welding department in great within range, promotes dust removal efficiency, improves the battery quality.

The embodiment of the present application also provides a welding apparatus, referring to fig. 2 to 13, including a welding head 101 and a dust removing device, the dust removing device including: dust removing pipe 100 is provided near bonding tool 101, the pipe wall of dust removing pipe 100 has dust removing port 20 opened toward bonding tool 101, and dust removing port 20 of dust removing pipe 100 partially surrounds bonding tool 101.

The dust removal pipe 100 encloses a ring shape with a gap. When the electrode lug is welded, the welding end face 30 of the welding head 101 is contacted with one welding face of the electrode lug to weld the electrode lug, and the other welding face of the electrode lug is positioned on the welding seat. The tab enters the area surrounded by the non-closed ring-shaped dust removing pipeline 100 from the notch, so that the dust removing opening 20 surrounds the three sides of the tab except the side connected with the main body, namely, three sides of the dust removing opening 20 surround the tab.

The height dimension of the dust removing port 20 is smaller than the height dimension of the dust removing pipe 100 in the axial direction of the annular dust removing pipe 100. Dust removal port 20 is disposed near the bottom of dust removal pipe 100, the bottom of dust removal pipe 100 is near welding end face 30 of bonding tool 101, and welding end face 30 is the end face of bonding tool 101 for energy transfer.

The inside of the entire dust removing pipe 100 communicates, specifically, the dust removing pipe 100 includes: the bending part 111 and two side parts 112 connected with opposite ends of the bending part 111, the two side parts 112 are oppositely arranged, the bending part 111 and the two side parts 112 are encircled to form a ring shape, and the bending part 111 and the two side parts 112 are communicated with each other.

The dust removal pipeline 100 is provided with two air extraction openings 102, and the two air extraction openings 102 are distributed on two opposite sides of the dust removal pipeline 100.

The dust removing pipe 100 has a polygonal cross-sectional shape. The walls of the dust removal pipe 100 may include: axially opposed top and bottom walls 32, 33 of the annular dust removal duct 100, and opposed side walls 34 between the top and bottom walls 32, 33 and contiguous with both the top and bottom walls 32, 33.

The air extraction opening 102 is disposed on the top wall 32 of the dust removing pipe 100, the dust removing opening 20 may be disposed on a side of the dust removing pipe 100 facing the welding head 101, and the flow guiding portion 103 extends from the top wall 32 of the dust removing pipe 100 to the dust removing opening 20 and is connected to a side of the dust removing opening 20 away from the bottom wall 33 of the dust removing pipe 100. Deflector 103 is inclined relative to bottom wall 33 of dusting tube 100 and is oriented away from bonding tool 101.

The dust removing device further includes: the two exhaust pipes 104, the exhaust pipe 104 is connected to the exhaust port 102, the exhaust pipe 104 is used for exhausting the dust removal pipeline 100, the exhaust pipe 104 is provided with a first section 104a with gradually changed pipe diameter, the first section 104a is connected to the exhaust port 102, and the pipe diameter of the first section 104a is gradually decreased along the direction away from the exhaust port 102.

The welding device further includes: two connecting members 106, the two connecting members 106 being connected to the side surfaces of the welding head 101, respectively, and extending in opposite directions. Two mounting plates 107 are provided at both ends of the dust removing pipe 100, and two connecting members 106 are connected to the two mounting plates 107, respectively, so as to fix the welding head 101 to the dust removing pipe 100.

Top wall 32 of one side of dust removing conduit 100 facing away from welding end face 30 of bonding tool 101 has a recess 105, recess 105 being configured to mate with bonding tool 101 such that dust removing conduit 100 can be fixedly mounted to bonding tool 101 with recess 105 opposite the indentation.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A welding device, the welding device comprising a welding head and a dust extraction device, the dust extraction device comprising: the pipe wall of the dust removing pipeline is provided with a dust removing opening facing the welding head, the dust removing opening of the dust removing pipeline at least partially surrounds the welding end face of the welding head, and the welding end face is the end face of the welding head for transmitting energy.

2. The welding device of claim 1, wherein the dust removal duct is looped, the weld head is located on one side of the dust removal duct in an axial direction of the looped dust removal duct, and the dust removal port extends in a circumferential direction of the dust removal duct such that the dust removal port of the dust removal duct at least partially surrounds the weld head.

3. The welding device of claim 2, wherein the dust removal conduit defines a ring with a gap.

4. The welding device according to claim 2, wherein a height dimension of the dust removal port is smaller than a height dimension of the dust removal pipe in an axial direction of the ring-shaped dust removal pipe.

5. The welding device of claim 4, wherein the dust removal port is disposed proximate a bottom of the dust removal conduit proximate a welding end face of the welding head.

6. The welding device of claim 2, wherein the interior of the entire dust removal conduit communicates.

7. The welding apparatus of claim 6, wherein the dust removal conduit comprises: the bending part and the two side parts are connected with the two opposite ends of the bending part, the two side parts are oppositely arranged, the bending part and the two side parts are encircled to form the ring shape, and the bending part and the two side parts are communicated with each other.

8. The welding device of claim 2, wherein the interior of the dust removal conduit is divided into at least two sections that are independent of each other, the at least two sections including adjacent first and second sections, and the first and second sections are not in communication with each other.

9. The welding device of claim 2, wherein the dust removal pipe comprises a plurality of sub dust removal pipes which are arranged independently of each other, and the plurality of sub dust removal pipes are arranged in sequence and are arranged around the welding head.

10. The welding device according to any one of claims 1-9, wherein at least one extraction opening is provided in the dust removal duct.

11. The welding device according to claim 10, wherein a plurality of extraction openings are provided in the dust removal pipe in the case of communication of the inside of the entire dust removal pipe, the plurality of extraction openings being distributed on opposite sides of the dust removal pipe.

12. The welding device of claim 10, wherein a wall of the dust removal conduit proximate the weld head includes a deflector portion contiguous with the dust removal port, the deflector portion being inclined toward a side distal from the weld head.

13. The welding device of claim 10, wherein the dust extraction device further comprises: at least one exhaust pipe, the exhaust pipe connect in the extraction opening, the exhaust pipe is used for to the dust removal pipeline is taken out.

14. The welding device of claim 13, wherein the suction tube has at least a first segment with a gradually changing tube diameter, the first segment being connected to the suction opening, the tube diameter of the first segment being in a decreasing trend in a direction away from the suction opening.

15. The welding device as defined in any one of claims 1-9, wherein the welding head is fixedly connected to the dust extraction device.

16. The welding device of claim 15, wherein the welding device further comprises: the connecting piece, the one end of connecting piece with the bonding tool is connected, the other end of connecting piece with dust removal pipeline is connected, so that the bonding tool with dust collector fixed connection.

17. The welding device of any one of claims 2-9, wherein a top wall of the dust removal conduit on a side facing away from the welding end face of the welding head has a recess configured to mate with the welding head to enable the dust removal conduit to be fixedly mounted on the welding head.

18. The welding device of claim 17, wherein the recess is opposite the gap in the case where the dust removing pipe is surrounded in a ring shape having a gap.

19. A battery production apparatus comprising the welding device according to any one of claims 1 to 18.

20. The apparatus of claim 19, wherein the welding device is configured to weld the tab and the tab of the battery.