CN218964469U - Welding device - Google Patents

Abstract

The embodiment of the utility model provides a welding device. The welding device comprises a welding assembly and a clamping assembly; the clamping assembly comprises a first pressing piece positioned in a first direction and a second pressing piece positioned in a second direction, wherein the first direction and the second direction are two directions perpendicular to each other, and the second direction is perpendicular to the end face of the cover plate; the pressing surface of the first pressing piece presses against the welding position of the cover plate and the shell, and the pressing surface of the second pressing piece presses against the end surface of the cover plate; at least one side of the clamping component is provided with a welding component, a welding head of the welding component, a welding position of the cover plate and the shell are positioned at opposite positions, and the extending direction of the welding head is consistent with the first direction. In this way, not only the weld produced between the cover plate and the case is made small, but also the problem of internal damage of the battery due to improper welding operation can be avoided.

Description

Welding device

Technical Field

The utility model relates to the technical field of battery production, in particular to a welding device.

Background

In the production of batteries, the cover plate is usually preassembled to the housing of the battery and the gap between the cover plate and the housing is welded.

At present, when welding the gap between the cover plate and the housing, the cover plate and the housing are fixed by a clamp assembly, and then welded by a welding assembly. The clamp assembly generally comprises two pressing strips, the two pressing strips are abutted with the shell of the battery and press the shell to close to the edge of the cover plate of the battery, a slit is formed between the cover plate and the shell, and finally the two pressing strips adjust the size of the slit through pressing the shell so as to meet the welding requirement.

However, on the one hand, the housing is not easily pressed against the cover plate, which in turn results in a large weld between the cover plate and the housing. On the other hand, the welding component is opposite to the inside of the battery, so that light transmission is very easy to cause burning of the pole core inside the battery under the condition of overlarge welding seam.

Disclosure of Invention

In order to solve or partially solve the above problems, the present utility model discloses a welding device to solve the problems of large weld seam and easy internal damage of the battery generated when a slit is formed between a welding cover plate and a housing in the prior art.

The utility model discloses a welding device, which is used for welding a cover plate and a shell of a battery, and comprises a welding assembly and a clamping assembly;

the clamping assembly comprises a first pressing piece positioned in a first direction and a second pressing piece positioned in a second direction, wherein the first direction and the second direction are two directions perpendicular to each other, and the second direction is perpendicular to the end face of the cover plate;

the pressing surface of the first pressing piece presses against the welding position of the cover plate and the shell, and the pressing surface of the second pressing piece presses against the end surface of the cover plate;

the welding assembly is arranged on at least one side of the clamping assembly, a welding head of the welding assembly is positioned at a relative position with the welding positions of the cover plate and the shell, and the extending direction of the welding head is consistent with the first direction.

Optionally, the clamping assembly further comprises a third pressing piece;

the third pressing piece and the first pressing piece are positioned on the same side of the battery, and the pressing surface of the third pressing piece is pressed against the shell.

Optionally, a plurality of through grooves are formed in the first pressing piece, and the welding positions of the cover plate and the shell and the through grooves are located at opposite positions.

Optionally, the welding device further comprises a detection component;

the detection component is arranged on one side of the clamping component and is used for detecting the pressing position of the second pressing piece.

Optionally, the detection assembly includes a ranging sensor and a mounting bracket;

the distance measuring sensor is arranged on the top of the mounting bracket and is used for measuring distance and enabling the welding positions of the cover plate and the shell to be in relative positions with the welding head.

Optionally, the welding device further comprises a controller;

the distance measuring sensor is electrically connected with the controller;

the controller controls the position of the welding head based on data measured by the ranging sensor so that the welding position of the cover plate and the housing is in a relative position to the welding head.

Optionally, the welding device further comprises a first driving member and a second driving member;

the first driving piece is connected with the first pressing piece and drives the first pressing piece to move towards a welding position close to or far away from the cover plate and the shell along the first direction;

the second driving piece is connected with the second pressing piece, and the second driving piece drives the second pressing piece to move towards the end face close to or far away from the cover plate along the second direction.

Optionally, the first driving piece and the second driving piece are both slipway cylinders;

the first pressing piece comprises a first pressing part and a first connecting part, the first pressing part is in sliding connection with the first driving piece, and the first pressing part is arranged at the end part of the first connecting part;

the second pressing piece comprises a second pressing part and a second connecting part, the second connecting part is connected with the second driving piece in a sliding mode, and the second pressing part is arranged at the end portion of the second connecting part.

Optionally, the second pressing portion includes a pressing plate and a boss, the boss protrudes from a surface of the pressing plate facing the end face of the cover plate, and an area of a surface of the pressing plate facing the end face of the cover plate is larger than an area of a surface of the boss facing the end face of the cover plate.

Optionally, the welding assembly comprises a first moving module, a second moving module, a laser welding head and a fixed bracket;

the second mobile module is arranged on the first mobile module, the first mobile module is arranged on the fixed bracket, and the laser welding head is arranged on the second mobile module;

or the clamping assembly is arranged on the second moving module, the first moving module is arranged on the fixed bracket, and the laser welding head is arranged on the first moving module;

the first moving module moves along a first direction, and the second moving module moves along a third direction, wherein the third direction is a direction perpendicular to the first direction and the second direction at the same time.

Compared with the prior art, the embodiment of the utility model has the following advantages:

as can be seen from the foregoing embodiments, in the embodiments of the present utility model, since the clamping assembly includes the first pressing member located in the first direction and the second pressing member located in the second direction, the pressing surface of the first pressing member presses against the end surface of the cover plate at the welding position of the cover plate and the housing, and the pressing surface of the second pressing member presses against the end surface of the cover plate, during welding, the first pressing member presses against the welding position of the cover plate and the housing, so that the relative position between the cover plate and the housing is kept stable, the pressing surface of the second pressing member presses against the end surface of the cover plate, and since the cover plate is connected with the tab made of a softer material, the cover plate is easily pressed against the housing, and therefore, the weld seam generated between the cover plate and the housing can be reduced. And because at least one side of the clamping component is provided with the welding component, the welding head of the welding component and the gap between the cover plate and the shell are in relative positions, and the extending direction of the welding head is consistent with the first direction, the welding head faces the cover plate rather than the battery, and the problem that the welding head is improperly operated to cause light transmission to burn out the pole core in the battery under the condition of overlarge welding seam is avoided. In summary, when the welding device provided by the embodiment of the utility model is used for welding the cover plate and the shell, the generated welding seam between the cover plate and the shell is smaller, and the problem of damage to the electrode core in the battery caused by improper welding operation can be avoided.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required for the description of the embodiments or the prior art will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art

FIG. 1 is a top view of a welding apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic view of an assembly of a clamping assembly and a battery of an embodiment of the present utility model;

FIG. 3 is an enlarged partial schematic view of an assembled schematic view of a clamping assembly and battery of an embodiment of the utility model at A of FIG. 2;

FIG. 4 is an isometric view of a welding apparatus according to an embodiment of the utility model;

FIG. 5 is a schematic view of a weld assembly according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a detection assembly according to an embodiment of the present utility model.

Reference numerals illustrate:

1-a cover plate; 2-a housing; 3-welding the assembly; 4-a clamping assembly; 5-a first driving member; 6-a second driving member; 7-a third cylinder; 8-a detection assembly; 11-end face of the cover plate; 31-a first mobile module; 32-a second mobile module; 33-a laser welding head; 34-fixing the bracket; 41-a first pressing member; 42-a second pressing member; 43-third pressing member; 81-ranging sensors; 82-mounting a bracket; 411-through slot; 412-a first connection; 413-a first pressing portion; 421-second connection; 422-a second pressing portion; 4221-pressing plate; 4222-boss.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present utility model. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Fig. 1 is a top view of a welding apparatus according to an embodiment of the present utility model, fig. 2 is an assembled schematic view of a clamping assembly 4 and a battery according to an embodiment of the present utility model, and fig. 3 is an enlarged partial schematic view of an assembled schematic view of a clamping assembly and a battery according to an embodiment of the present utility model at a of fig. 2, and as shown in fig. 1, 2 and 3, the welding apparatus includes a welding assembly 3 and a clamping assembly 4.

The clamping assembly 4 comprises a first pressing piece 41 positioned in a first direction and a second pressing piece 42 positioned in a second direction, wherein the first direction and the second direction are two directions perpendicular to each other, and the second direction is perpendicular to the end face 11 of the cover plate 1; the pressing surface of the first pressing piece 41 presses against the end surface of the cover plate 1 at the welding position of the cover plate 1 and the housing 2, and the pressing surface of the second pressing piece 42 presses against the end surface of the cover plate 1; at least one side of the clamping component 4 is provided with a welding component 3, a welding head of the welding component 3 is positioned opposite to the welding positions of the cover plate 1 and the shell 2, and the extending direction of the welding head is consistent with the first direction.

Wherein the welding device is used for welding a gap between the cover plate 1 and the housing 2 of the battery. In general, a battery includes a case 2, a tab in the case, and a cap plate 1, the cap plate 1 connecting the tab of the tab and closing an opening of the case 2. The shell 2 can be a box-shaped structure with two open ends, when in welding, the cover plate 1 is preloaded to the openings at the two ends of the shell 2, the shell 2 and the cover plate 1 are clamped by the clamping assembly 4, the gap between the shell 2 and the cover plate 1 is reduced, and finally the shell 2 and the cover plate 1 are welded tightly by the welding assembly 3.

In order to avoid the problem that the weld bead generated when the slit is formed between the welding cover plate 1 and the case 2 is large and damage to the inside of the battery is liable to occur, in the embodiment of the present utility model, the clamping assembly 4 includes the first pressing piece 41 located in the first direction and the second pressing piece 42 located in the second direction. In the embodiment of the present utility model, the first direction is a direction shown as Y in fig. 1, the second direction is a direction shown as X in fig. 2, the first direction Y and the second direction X are two directions perpendicular to each other, and the second direction X is a direction perpendicular to the end face 11 of the cover plate 1.

It should be noted that, the first pressing member 41 and the second pressing member 42 may be L-shaped block structures, T-shaped block structures, or other structures having pressing surfaces, which are not limited in the embodiment of the present utility model. The pressing surface of the first pressing piece 41 presses against the welding position of the cover plate 1 and the housing 2, so that the weld formed between the housing 2 and the cover plate 1 is pressed. The weld seam between the housing 2 and the cover plate 1 can then be reduced by pressing the cover plate 1 onto the end face of the cover plate 1 by means of the second pressing element 42, i.e. by means of the second pressing element 42.

Further, the specific position of the first pressing member 41 may be: the first pressing member 41 is located on a side facing the first surface of the battery, and in the case where the battery is rectangular, the first surface of the battery may be one side surface of the battery having a larger area than the end surface, or the first surface of the battery may be one side surface of the battery having a smaller area than the end surface. That is, the first pressing member 41 may be located on one side of the two sides of the battery having a smaller area other than the end face, or may be located on one side of the two sides of the battery having a larger area other than the end face, which is not limited in the embodiment of the present utility model. When the first pressing member 41 faces the side surfaces of the battery having different areas, the size of the first pressing member 41 may be changed accordingly according to the arrangement position of the first pressing member 41, so as to achieve the corresponding pressing effect.

At least one side of the clamping component 4 is provided with a welding component 3, a welding head of the welding component 3 is positioned at a relative position with the welding position of the cover plate 1 and the shell 2, and the extending direction of the welding head is consistent with the first direction, so that the welding head faces the cover plate rather than the battery, and the problem that light transmission is caused by improper operation to burn out a pole core in the battery under the condition of overlarge welding seam is avoided.

In one possible implementation, the welding assembly 3 is provided on one side of the clamping assembly 4. In some embodiments, the rotating mechanism and the clamping assembly can be matched for use, after one side of the battery is welded, the other side of the battery can be turned over to a position opposite to the welding assembly 3 through the rotating mechanism, and the welding of the other side of the battery is completed, so that the number of the welding assemblies 3 can be saved, and the welding cost can be further saved. In other embodiments, a guide rail which can be perpendicular to the extending direction of the welding head can be arranged on the welding assembly 3, and the welding position of the welding assembly 3 can be changed through the movement of the guide rail, so that the welding of one welding assembly to different positions of the battery can be realized. In other embodiments, the welding assemblies 3 are arranged on two sides of the clamping assembly, so that when welding the welding seam between the cover plate 1 and the shell 2 on one side of the battery, only the welding assemblies 3 on the same side of the battery are required to be welded, so that two sides of the battery can be welded simultaneously, and the welding efficiency is improved. In summary, the number of the welding assemblies 3 according to the embodiment of the present utility model is determined according to the welding requirements, which is not limited in the embodiment of the present utility model,

as can be seen from the above embodiments, in the embodiment of the present utility model, since the clamping assembly 4 includes the first pressing member 41 located in the first direction and the second pressing member 42 located in the second direction, the pressing surface of the first pressing member 41 presses against the end face 11 of the cover plate 1 at the welding position of the cover plate 1 and the housing 2, and therefore, during welding, the pressing surface of the second pressing member 42 presses against the end face 11 of the cover plate 1 through the first pressing member 41 at the welding position of the cover plate 1 and the housing 2, so that the relative position between the cover plate 1 and the housing 2 is kept stable, and the pressing surface of the second pressing member 42 presses against the end face 11 of the cover plate 1, and since the cover plate 1 is connected with the tab made of a soft material, the cover plate 1 is easily pressed against the housing 2, and thus the weld seam generated between the cover plate 1 and the housing 2 can be reduced. And because the welding component 3 is arranged on at least one side of the clamping component 4, the welding head of the welding component 3 and the gap between the cover plate 1 and the shell 2 are in relative positions, and the extending direction of the welding head is consistent with the first direction, the welding head faces the cover plate instead of being right opposite to the interior of the battery, and the problem that light transmission is caused and the pole core in the battery is burnt due to improper operation under the condition of overlarge welding seam is avoided. In summary, when the welding device provided by the embodiment of the utility model is used for welding the cover plate 1 and the shell 2, the generated welding seam between the cover plate 1 and the shell 2 is smaller, and the problem of damage to the electrode core in the battery caused by improper welding operation can be avoided.

Furthermore, in some embodiments, the clamping assembly 4 further comprises a third abutment 43; the third pressing piece 43 and the first pressing piece 41 are located on the same side of the battery, and the pressing surface of the third pressing piece 43 presses against the case 2.

It should be noted that, since the pressing surface of the third pressing member 53 presses against the housing 2, before the cover plate 1 and the housing 2 are welded, the pressing surface of the third pressing member 43 may be pressed against the housing 2, so that the relative position of the housing 2 remains unchanged, so that the subsequent welding is facilitated, while the welding error is reduced, and the cover plate 1 and the housing 2 may be clamped between the second pressing member 42 and the third pressing member 43 to maintain the stability of the position when the second pressing member 42 is matched subsequently.

Optionally, as shown in fig. 3, in order to facilitate the welding head of the welding assembly 3 to be located at a relative position to the welding positions of the cover plate 1 and the housing 2, in the embodiment of the present utility model, a plurality of through slots 411 are formed on the first pressing member 41, and the welding positions of the cover plate 1 and the housing 2 and the through slots 411 are located at the relative positions. In this way, the welding position of the cover plate 1 and the shell 2 and the through slot 411 are in relative positions, so that the gap between the cover plate 1 and the shell 2 and the through slot 411 are communicated, when the welding component 3 welds the gap between the cover plate 1 and the shell 2, the welding head can extend into the gap between the cover plate 1 and the shell 2 through the through slot 411 to weld, and the welding head faces the cover plate instead of being right opposite to the inside of the battery, so that the problem that the light transmission is caused by improper operation under the condition of overlarge welding seam to burn out the pole core inside the battery is avoided, and the yield of the battery in the welding process is improved.

Further, the interval between every two adjacent through slots 411 is equal. Therefore, when the welding position of the welding head moves, the distance of each movement is equal, so that the generated welding seam between the cover plate 1 and the shell 2 is uniform, and the welding quality is improved.

Optionally, as shown in fig. 4, the welding device further comprises a detection assembly 8; the detection component 8 is arranged on one side of the clamping component 4, and the detection component 8 is used for the pressing position of the second pressing piece 42.

It should be noted that, the detecting component 8 may start to measure the pressing position of the second pressing component after the second pressing component 42 presses against the cover plate 1, that is, measure the relative distance between the second pressing component and the detecting component 8, and if the relative distance between the second pressing component and the detecting component 8 is greater than or less than the distance between the detecting component and the second pressing component when the cover plate 1 and the housing 2 are welded, it is indicated that the welding component 3 is not in the relative position with the gap between the cover plate 1 and the housing 2, that is, the welding head of the welding component 3 is not aligned with the welding seam. On the contrary, the alignment of the welding assembly 3 and the welding seam is described, so that the outer shell 2 and the cover plate 1 can be quickly and accurately welded through the detection assembly 8, and the accuracy in the welding process can be improved.

Optionally, as shown in fig. 6, the detection assembly 8 includes a ranging sensor 81 and a mounting bracket 82; a distance measuring sensor 81 is mounted on top of the mounting bracket 82, the distance measuring sensor (81) being used for measuring distance and bringing the welding position of the cover plate 1 and the housing 2 into a relative position with the welding head.

The distance measuring sensor 81 may be one of sensors for distance measurement, such as an ultrasonic sensor and a laser sensor, and the embodiment of the present utility model is not limited thereto. The distance measuring sensor 81 and the cover plate 1 are positioned at the welding position of the housing 2, so that once the distance between the second pressing piece 51 and the cover plate 2 deviates from the preset distance, the welding seam and the welding head can be judged to be aligned or not through the sensing of the distance measuring sensor 81.

Further, the welding apparatus further includes a controller electrically connected to the distance measuring sensor 81, and the controller controls the position of the welding head based on data measured by the distance measuring sensor 81 so that the welding position of the cover plate 1 and the housing 2 is in a relative position to the welding head.

It should be noted that the ranging sensor may include a detection module and a data transmission module; the detection module and the data transmission module are respectively and electrically connected with the controller; the detection module is used for detecting the distance from the second pressing piece 42 to the ranging sensor under the condition that the pressing surface of the second pressing piece 42 presses against the cover plate 2; the data sending module is used for obtaining difference information between the distance from the second pressing piece 42 to the sensor and a preset distance, and sending the difference information to the controller, wherein the preset distance is the distance from the sensor to the second pressing piece 42 when the cover plate 1 and the shell 2 are welded; the controller is configured to control the position of the welding head based on the received difference information such that the welding position of the cover plate 1 and the housing 2 is in a relative position to the welding head.

It should be noted that, the detection assembly 8 may be electrically connected to the controller, and the distance between the ranging sensor and the second pressing member 42 is set to be a preset distance when the cover plate 1 and the housing 2 are welded. In the subsequent welding process, in the case where the pressing surface of the second pressing piece 42 is pressed against the cover plate 2, the distance from the second pressing piece 42 to the distance measuring sensor is detected by the detection module. The data transmitting module is configured to obtain difference information between the distance from the second pressing member 42 to the sensor and the preset distance, and transmit the difference information to the controller. Finally, the controller compares the received difference information with the preset distance, generates a control signal based on the difference between the difference information and the preset distance, and further controls the welding component 3 to modulate the position of the welding head through the control signal, so that the welding head and the welding seam are always kept at the same position. If the difference information received by the controller is not equal to the preset distance, that is, the distance between the ranging sensor and the second pressing piece 42 when the cover plate 1 and the shell 2 are welded is not equal to the distance between the ranging sensor and the second pressing piece 42 in the actual welding process, that is, the welding head and the welding seam are not aligned, the position of the welding head needs to be adjusted. If the difference information received by the controller is equal to the preset distance, it indicates that the distance between the ranging sensor and the second pressing member 42 is equal to the distance between the ranging sensor and the second pressing member 42 in the actual welding process under the condition that the welding is completed, that is, it indicates that the welding head and the welding seam are completely aligned, and it is not necessary to adjust the position of the welding head. Like this, can not only can be fast accurate to the welding of shell 2 and apron 1 through detection component 8, can promote the accuracy in the welding process moreover.

Furthermore, in order to achieve an automatic pressing of the first pressing member 41 and the second pressing member 42, in the embodiment of the present utility model, the welding apparatus further includes a first driving member 5 and a second driving member 6; the first driving member 5 is connected with the first pressing member 41, and the first driving member 5 drives the first pressing member 41 to move in a first direction toward or away from the welding position of the cover plate 1 and the housing 2; the second driving member 6 is connected to the second pressing member 42, and the second driving member 6 drives the second pressing member 42 to move toward or away from the end face of the cover plate 1 in the second direction. In this way, the first pressing piece 41 can be driven to move towards the welding position close to or far away from the cover plate 1 and the shell 2 through the expansion and contraction of the first driving piece 5, the second pressing piece 42 can be driven to move towards the end face close to or far away from the cover plate 1 through the expansion and contraction of the second driving piece 6, and the battery can be taken and placed before and after welding while the movement of the first pressing piece 41 and the second pressing piece 42 is controlled conveniently.

Further, the first driving member 5 and the second driving member 6 may be any one of a slide table cylinder, a gas-liquid damping cylinder, a film cylinder, an impact cylinder, and the like. Taking the first driving piece 5 and the second driving piece 6 as sliding table cylinders as an example, the first pressing piece 41 comprises a first pressing part 413 and a first connecting part 412, the first pressing part 413 is slidably connected with the first driving piece 5, and the first pressing part 413 is arranged at the end part of the first connecting part 412; the second pressing member 42 includes a second pressing portion 422 and a second connecting portion 421, the second connecting portion 421 and the second driving member 6 are slidably connected, and the second pressing portion 422 is disposed at an end of the second connecting portion 421.

It should be noted that the sliding table cylinder may include a sliding table, a circulating linear guide rail assembly, a piston, and a guide rod. Compressed air is input into the sliding table cylinder, the guide rod is pushed by one end cylinder, the guide rod is pushed in the opposite direction, and the pushing stroke depends on the length of the guide rod. The piston of the cylinder is fixed on the piston rod, the plates at the two ends of the piston rod can be firmly fixed on the machine table, and the sliding table reciprocates on the piston rod. In the embodiment of the present utility model, the first connection portion 412 included in the first pressing member 41 may be connected to the slide table of the first driving member 5 by a bolt or the like, and the second connection portion 421 included in the first pressing member 41 may be connected to the slide table of the second driving member 6 by a bolt or the like. Thus, when the sliding table of the first driving member 5 slides, the first pressing portion 413 can be driven to move towards the welding position close to or far away from the cover plate 1 and the housing 2 along the first direction, and when the sliding table of the second driving member 6 slides, the second pressing portion 422 can be driven to move towards the end face close to or far away from the cover plate 1 along the second direction.

In addition, when the embodiment of the present utility model further includes the third pressing member 43, the third cylinder 7 may be disposed, and the third pressing member 43 is driven by the third cylinder 7 to move in a direction approaching or separating from the first surface of the battery, and the connection manner of the third cylinder 7 and the third pressing member 43 is consistent with the connection manner of the first driving member 5 and the first pressing member 41, which is not described herein.

It should be noted that, the first pressing portion 413 and the first connecting portion 412 may have a plate-like structure, and a plane in which the first pressing portion 413 and the first connecting portion 412 are located are perpendicular to each other. The second pressing portion 422 and the second connecting portion 421 may have a plate-like structure, and a plane in which the second pressing portion 422 and the second connecting portion 421 are located may be perpendicular to each other. In this way, it is ensured that the abutment surface of the first abutment 41 is always perpendicular to the direction of movement of the first driving member 5 and that the abutment surface of the second abutment 42 is always perpendicular to the direction of movement of the second driving member 6.

Alternatively, as shown in fig. 3, the second pressing portion 422 includes a pressing plate 4221 and a boss 4222, the boss 4222 protrudes on a surface of the pressing plate 4221 facing the end face of the cover plate 1, and an area of a surface of the pressing plate 4221 facing the end face 11 of the cover plate 1 is larger than an area of a surface of the boss 4222 facing the end face 11 of the cover plate 1. In this way, by the boss 4222 provided on the surface protruding from the pressing plate 4221 toward the end face of the cover plate 1, the contact area between the second pressing portion 422 and the end face 11 of the cover plate 1 can be reduced, and thus the pressure of the second pressing member 42 received by the end face 11 of the cover plate 1 can be increased, so that the generated weld between the cover plate 1 and the case 2 can be further reduced.

In some embodiments, as shown in fig. 5 and 4, the welding assembly 3 includes a first moving die set 31, a second moving die set 32, a laser welding head 33, and a fixed bracket 34; the second moving module 32 is installed on the first moving module 31, the first moving module 31 is installed on the fixed bracket, and the laser welding head 33 is installed on the second moving module 32; or the clamping component 4 is arranged on the second moving module 32, the first moving module 31 is arranged on the fixed bracket, and the laser welding head 33 is arranged on the first moving module 32; the first moving module 31 moves along a first direction, and the second moving module 32 moves along a third direction, wherein the third direction is a direction perpendicular to the first direction and the second direction at the same time.

It should be noted that, in one possible implementation manner, the second moving module 32 is installed on the first moving module 31, the first moving module 31 is installed on the fixed support 34, and the laser welding head 33 is installed on the second moving module 32, so that when the relative position between the laser welding head 33 and the welding seam is adjusted, the laser welding head 33 can be driven to move by the first moving module 31 and the second moving module 32 directly, and then the preset position can be reached.

In another possible implementation manner, the clamping assembly 4 is mounted on the second moving module 44, the first moving module 31 is mounted on the fixed support 34, and the laser welding head 33 is mounted on the first moving module 31, so that when the relative position between the laser welding head 33 and the welding seam is adjusted, the second moving module 32 can be moved to drive the clamping assembly 4 to move, and the first moving module 31 can be moved to drive the laser welding head 33 to move, and the effect of moving the laser welding head 33 to reach the preset position can be achieved. In this way, by performing different mounting manners on the first moving module 31 and the second moving module 32 included in the welding assembly 3, the welding device can adapt to various application scenarios without affecting the operation of the laser welding head 33, so that the use of the welding device is not limited by the mounting manner of the welding assembly 3. The third direction is the direction identical to the direction Z shown in fig. 2 and 4.

As can be seen from the above embodiments, in the embodiment of the present utility model, since the clamping assembly 4 includes the first pressing member 41 located in the first direction and the second pressing member 42 located in the second direction, the pressing surface of the first pressing member 41 presses against the end face 11 of the cover plate 1 at the welding position of the cover plate 1 and the housing 2, and therefore, during welding, the pressing surface of the second pressing member 42 presses against the end face 11 of the cover plate 1 through the first pressing member 41 at the welding position of the cover plate 1 and the housing 2, so that the relative position between the cover plate 1 and the housing 2 is kept stable, and the pressing surface of the second pressing member 42 presses against the end face 11 of the cover plate 1, and since the cover plate 1 is connected with the tab made of a soft material, the cover plate 1 is easily pressed against the housing 2, and thus the weld seam generated between the cover plate 1 and the housing 2 can be reduced. And because the welding component 3 is arranged on at least one side of the clamping component 4, the welding head of the welding component 3 and the gap between the cover plate 1 and the shell 2 are in relative positions, and the extending direction of the welding head is consistent with the first direction, the welding head faces the cover plate instead of being right opposite to the interior of the battery, and the problem that light transmission is caused and the pole core in the battery is burnt due to improper operation under the condition of overlarge welding seam is avoided. In summary, when the welding device provided by the embodiment of the utility model is used for welding the cover plate 1 and the shell 2, the generated welding seam between the cover plate 1 and the shell 2 is smaller, and the problem of damage to the electrode core in the battery caused by improper welding operation can be avoided.

In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that identical and similar parts between the embodiments are all mutually referred.

While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the utility model.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.

The foregoing has outlined a detailed description of a welding device according to the present utility model, wherein specific examples are provided herein to illustrate the principles and embodiments of the present utility model, the above examples being provided only to assist in the understanding of the method of the present utility model and the core idea thereof; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.

Claims (10)

1. Welding device for welding a cover plate (1) and a housing (2) of a battery, characterized in that the welding device comprises a welding assembly (3) and a clamping assembly (4);

the clamping assembly (4) comprises a first pressing piece (41) positioned in a first direction and a second pressing piece (42) positioned in a second direction, wherein the first direction and the second direction are two directions perpendicular to each other, and the second direction is perpendicular to the end face of the cover plate (1);

the pressing surface of the first pressing piece (41) presses the welding position of the cover plate (1) and the shell (2), and the pressing surface of the second pressing piece (42) presses the end surface of the cover plate (1);

at least one side of the clamping component (4) is provided with the welding component (3), a welding head of the welding component (3) and welding positions of the cover plate (1) and the shell (2) are located at opposite positions, and the extending direction of the welding head is consistent with the first direction.

2. Welding device according to claim 1, wherein the clamping assembly (4) further comprises a third abutment (43);

the third pressing piece (43) and the first pressing piece (41) are positioned on the same side of the battery, and the pressing surface of the third pressing piece (43) is pressed against the shell (2).

3. The welding device according to claim 1, wherein the first pressing member (41) is provided with a plurality of through slots (411), and the welding position of the cover plate (1) and the housing (2) and the through slots (411) are located at opposite positions.

4. Welding device according to claim 1, characterized in that it further comprises a detection assembly (8);

the detection assembly (8) is arranged on one side of the clamping assembly (4), and the detection assembly (8) is used for detecting the pressing position of the second pressing piece (42).

5. Welding device according to claim 4, characterized in that the detection assembly (8) comprises a distance measuring sensor (81) and a mounting bracket (82);

the distance measuring sensor (81) is arranged on the top of the mounting bracket (82), and the distance measuring sensor (81) is used for measuring distance and enabling the welding position of the cover plate (1) and the shell (2) to be in a relative position with the welding head.

6. The welding device of claim 5, further comprising a controller;

the ranging sensor (81) is electrically connected with the controller;

the controller controls the position of the welding head based on data measured by the distance measuring sensor (81) so that the welding position of the cover plate (1) and the housing (2) is in a relative position to the welding head.

7. Welding device according to claim 1, characterized in that the welding device further comprises a first drive (5) and a second drive (6);

the first driving piece (5) is connected with the first pressing piece (41), and the first driving piece (5) drives the first pressing piece (41) to move towards or away from a welding position of the cover plate (1) and the shell (2) along the first direction;

the second driving piece (6) is connected with the second pressing piece (42), and the second driving piece (6) drives the second pressing piece (42) to move towards the end face close to or far away from the cover plate (1) along the second direction.

8. Welding device according to claim 7, characterized in that the first driving member (5) and the second driving member (6) are both slipway cylinders;

the first pressing piece (41) comprises a first pressing part (413) and a first connecting part (412), the first pressing part (413) is in sliding connection with the first driving piece (5), and the first pressing part (413) is arranged at the end part of the first connecting part (412);

the second pressing piece (42) comprises a second pressing part (422) and a second connecting part (421), the second connecting part (421) is in sliding connection with the second driving piece (6), and the second pressing part (422) is arranged at the end part of the second connecting part (421).

9. The welding device according to claim 8, wherein the second pressing portion (422) includes a pressing plate (4221) and a boss (4222), the boss (4222) protrudes on a surface of the pressing plate (4221) facing the end face of the cover plate (1), and an area of a surface of the pressing plate (4221) facing the end face of the cover plate (1) is larger than an area of a surface of the boss (4222) facing the end face of the cover plate (1).

10. Welding device according to claim 1, characterized in that the welding assembly (3) comprises a first mobile module (31), a second mobile module (32), a laser welding head (33) and a fixed support (34);

the second mobile module (32) is arranged on the first mobile module (31), the first mobile module (31) is arranged on the fixed bracket (34), and the laser welding head (33) is arranged on the second mobile module (32);

or the clamping assembly (4) is arranged on the second moving module (32), the first moving module (31) is arranged on the fixed bracket (34), and the laser welding head (33) is arranged on the first moving module (31);

the first moving module (31) moves along a first direction, and the second moving module (32) moves along a third direction, wherein the third direction is a direction perpendicular to the first direction and the second direction at the same time.

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