CN216502960U - Fixtures and Welding Equipment - Google Patents

Abstract

The utility model discloses a fixing device and welding equipment. The fixing device comprises a positioning fixture and a pressing component, the positioning fixture can locate a battery, and the pressing component includes an elastic piece and a pressing piece, and the elastic piece and the pressing piece are connected ; Wherein, when the battery is positioned on the positioning fixture, the pressing component can move in the direction close to the sealing nail, so that the pressing member is in contact with the head of the sealing nail, and the elastic member is elastically deformed, so that the pressing member It elastically resists the head of the sealing nail. The elastic member is elastically deformed, and under the elastic force of the elastic member, the pressing member abuts against the center position of the sealing nail. Even if there is an error in the outer contour of the battery, the pressing member will not excessively abut against the sealing nail. Causes the sealing pins to be displaced or upturned, and cause the appearance of the battery to be damaged.

Description

Fixtures and Welding Equipment

technical field

The utility model relates to the technical field of battery manufacturing, in particular to a fixing device and welding equipment.

Background technique

In the related art, when the battery sealing nail and the battery top cover are pre-welded, the pressing rod of the positioning jig is under the action of the driving member, and the end of the pressing rod is pressed against the center of the head of the battery sealing nail, and the The outer edge of the head is exposed, and the laser beam is irradiated to the outer edge of the head of the battery sealing nail, so as to realize pre-welding between the battery sealing nail and the battery top cover, and then preliminarily fix the battery sealing nail.

However, when the battery is manufactured, there is a certain dimensional deviation in the outer contour of the battery. If the outer contour of the battery is too large, the end of the pressing rod will over-press the head of the battery sealing stud, which will cause the battery sealing stud to be offset or Upturning, and poor appearance of battery products.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a fixing device, which can improve the situation that the sealing nail of the battery is offset or upturned when being pressed.

The utility model also provides a welding device with the above-mentioned fixing device.

The fixing device according to the embodiment of the first aspect of the present invention, used for fixing the sealing nail to the liquid injection hole of the battery, includes:

a positioning fixture capable of positioning the battery;

a pressing component, comprising an elastic piece and a pressing piece, the elastic piece is connected with the pressing piece;

Wherein, when the battery is positioned on the positioning jig, the pressing component can move in a direction close to the sealing nail, so that the pressing member is in contact with the head of the sealing nail, and The elastic member is elastically deformed, so that the pressing member elastically abuts against the head of the sealing nail.

The fixing device according to the embodiment of the present invention has at least the following beneficial effects: in the process of positioning the battery by the positioning jig, the pressing member is pressed against the center position of the head of the sealing nail, so as to realize the pressing and the sealing of the sealing nail of the battery. position. Among them, the elastic member is elastically deformed, and under the elastic force of the elastic member, the pressing member abuts against the center position of the sealing stud, even if there is an error in the outer contour of the battery, the pressing member will not be excessively pressed against the seal. nails, causing the sealing nails to be offset or upturned, and causing the appearance of the battery to be damaged; it is understandable that when the outer contour of the top cover of the battery is too high, the amount of compression of the elastic part is large; when the top cover of the battery is The lower the outer profile, the less elastic will compress.

According to some embodiments of the present invention, the pressing assembly further includes an elastic member, one end of the elastic member is connected to the fixing seat, and the other end of the elastic member is connected to the pressing member, so as to The pressing member is made to abut against the head of the sealing nail when the pressing member is in the pressing position.

According to some embodiments of the present invention, the pressing component includes a fixing seat, and the elastic member and the pressing member are assembled on the fixing seat; the fixing device further includes a driving member, and the driving member is connected to the fixing seat. The fixing base is connected to drive the fixing base to move toward or away from the positioning jig.

According to some embodiments of the present invention, the fixing base is provided with a guide hole, the pressing member is slidably connected to the guide hole, at least part of the pressing member is located outside the guide hole, and the elastic member is placed in the guide hole and abuts between the pressing member and the guide hole.

According to some embodiments of the present invention, the pressing member is a spherical body, and the diameter of the port of the guide hole is smaller than the diameter of the pressing member.

According to some embodiments of the present invention, the positioning jig includes a lower jig and an upper jig, the lower jig is used for carrying the bottom of the battery, and the upper jig is used for pressing the battery the top cover; the driving member is connected with the upper jig for driving the upper jig away from or close to the lower jig, and the fixing seat and the upper jig are integrally connected or detachable connect.

According to some embodiments of the present invention, the upper jig includes a main body part and a positioning part, the driving part is connected to the main body part, and the main body part is connected to the battery of the battery under the action of the driving part. The top covers are in contact with each other; the positioning part is provided with a through hole for facing the edge of the sealing nail, and the fixing seat is connected with the positioning part; wherein, the positioning part is detachably connected with the main body part.

According to some embodiments of the present invention, the upper jig includes a main body part and a positioning part, the driving part is connected to the main body part, and the main body part is connected to the battery of the battery under the action of the driving part. The top cover is in contact with each other; the positioning part is provided with a through hole, and the fixing seat is connected with the positioning part; wherein, the positioning part is movably connected to the main body part, so that the through hole can face the Seal the edges of the pegs.

According to some embodiments of the present invention, the positioning portion includes a central body, a connecting rib and an outer peripheral body, one end of the connecting rib is fixedly connected to a side surface of the central body, and the other end of the connecting rib is connected to the outer peripheral body The inner wall is fixedly connected, the through hole is formed between the central body, the connecting rib and the outer peripheral body, and the fixing seat is fixedly connected with the central body; wherein, the connecting rib has a plurality of The connecting ribs are evenly distributed around the central body.

According to some embodiments of the present invention, the pressing member has an arc-shaped surface for abutting with the head of the sealing nail.

The welding equipment according to the embodiment of the second aspect of the present invention includes:

The fixing device of the embodiment of the above-mentioned first aspect;

The laser mechanism includes a laser head, and the laser head is used for emitting a laser beam to the edge of the sealing nail of the battery.

The welding equipment according to the embodiment of the present invention has at least the following beneficial effects: the battery is vertically positioned on the positioning jig, and the pressing member of the pressing component is under the action of elastic force, and the pressing member presses the positioning sealing nail; at the same time, the laser The laser head of the mechanism beams the laser beam to the position between the edge of the sealing nail and the top cover of the battery, so that the position between the edge of the sealing nail and the top cover of the battery can be preliminarily welded. After the welding is completed, the battery is transported to the next process. , carry out the secondary welding of the sealing nail.

Additional aspects and advantages of the invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or learned by practice of the invention.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the utility model is further described, wherein:

1 is a schematic diagram of the overall structure of the welding equipment according to an embodiment of the present invention;

2 is an exploded schematic diagram of a partial structure of the welding equipment according to the embodiment of the present utility model;

3 is a longitudinal cross-sectional view of a pressing component in a fixing device according to an embodiment of the present invention;

4 is a schematic structural diagram of a positioning portion in a fixing device according to an embodiment of the present invention.

Reference number:

Positioning jig 100, frame 110, slide rail 111, sliding seat 112, lower jig 120, positioning groove 121, upper jig 130, main body 131, mounting groove 1311, positioning part 132, center body 1321, connecting ribs 1322 , the peripheral body 1323, the through hole 1324, the driving member 140;

The pressing component 200, the fixing seat 210, the guide hole 211, the elastic piece 220, the pressing piece 230, the sliding piece 240;

Laser mechanism 300, laser head 310;

The battery 400 , the sealing nail 410 , and the top cover 420 .

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as a limitation of the present invention.

In the description of the present utility model, it should be understood that the orientation descriptions related to orientations, such as up, down, front, rear, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings, only It is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of the present utility model, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including this number, above, below, within, etc. are understood as including this number. If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating the number of the indicated technical features or the order of the indicated technical features. relation.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution .

In the description of the present invention, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," or the like, is meant to incorporate the embodiments. A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

According to the first aspect of the present invention, a fixing device is disclosed. Referring to FIG. 1 to FIG. 3 , it is used for fixing the sealing nail 410 to the liquid injection hole of the battery 400 , including a positioning fixture 100 and a pressing assembly 200 . The positioning fixture 100 can position the battery 400, the pressing assembly 200 includes an elastic member 220 and a pressing member 230, and the elastic member 220 is connected with the pressing member 230; wherein, when the battery 400 is positioned on the positioning jig 100, the pressing assembly 200 Moving in the direction close to the sealing nail 410 , the pressing member 230 abuts the head of the sealing nail 410 , and the elastic member 220 is elastically deformed, so that the pressing member 230 elastically abuts the head of the sealing nail 410 .

Specifically, in the process of positioning the battery 400 by the positioning jig 100 , the pressing member 230 is pressed against the center of the head of the sealing nail 410 , so as to realize the pressing and positioning of the sealing nail 410 of the battery 400 . The elastic member 220 is elastically deformed, and under the elastic force of the elastic member 220, the pressing member 230 abuts against the central position of the sealing nail 410. Even if there is an error in the outer contour of the battery 400, the pressing member 230 will not The sealing studs 410 will not be overly pressed, causing the sealing studs 410 to be deflected or upturned, and the appearance of the battery 400 will be damaged. It can be understood that when the outer contour of the top cover 420 of the battery 400 is too high, the compression amount of the elastic member 220 is larger; when the outer contour of the top cover 420 of the battery 400 is lower, the compression amount of the elastic member 220 will be smaller.

In some embodiments, the positioning jig 100 includes a lower jig 120 and an upper jig 130 . The top of the lower jig 120 is provided with a positioning groove 121 suitable for the bottom of the battery 400 ; the upper jig 130 is horizontally located on the lower jig 120 Right above and opposite to the lower jig 120 , the pressing assembly 200 is arranged on the lower jig 120 . Specifically, the battery 400 is vertically placed on the lower jig 120, the bottom of the battery 400 is embedded in the positioning groove 121, and the center position of the head of the sealing nail 410 is just opposite to the pressing member 230; The 120 moves downward and abuts against the top cover 420 of the battery 400 , and the pressing member 230 can just abut against the central position of the head of the sealing nail 410 .

Further, the positioning jig 100 further includes a driving member 140 , the driving member 140 is connected with the upper jig 130 , the driving member 140 drives the upper jig 130 to move downward, and the lower surface of the upper jig 130 abuts against the top of the battery 400 . The cover 420, in this way, the lower jig 120 is used in cooperation with the upper jig 130, so that the battery 400 is stably positioned at a certain position. At the same time, the elastic member 220 and the pressing member 230 are assembled and connected to the upper jig 130. In this way, when the driving member 140 drives the upper jig 130 to move downward, both the elastic member 220 and the pressing member 230 move downward until the upper jig 130 is moved downward. The lower surface of the tool 130 is pressed against the top cover 420 of the battery 400 . At this time, the elastic member 220 is in a compressed state, and under the action of the elastic member 220 , the pressing member 230 presses against the center of the head of the sealing nail 410 .

It can be seen from the above that the driving member 140 drives the upper jig 130 and the pressing component 200 to move downward at the same time, the upper jig 130 is pressed against the top cover 420 of the battery 400 , and the pressing member 230 is pressed against the head of the sealing nail 410 . In this way, the upper jig 130 ensures the stability of the body of the battery 400 , thereby further ensuring that the pressing member 230 can press and locate the sealing nail 410 .

Furthermore, the positioning fixture 100 further includes a frame 110 , a sliding rail 111 and a sliding seat 112 . The sliding rail 111 is vertically fixed on the front side of the frame 110 , and the sliding seat 112 is vertically slidably connected to the sliding rail 111 . The rear side of the fixture 130 is fixedly connected to the front side of the sliding seat 112 . The driving member 140 is an air cylinder, the air cylinder is vertically fixed on the frame 110, and the piston rod of the air cylinder is fixedly connected with the sliding seat 112. In this way, the air cylinder drives the sliding seat 112 to reciprocate vertically, thereby driving the upper jig 130 to reciprocate up and down, and The pressing assembly 200 is driven to move up and down.

In some embodiments, the upper jig 130 includes a main body portion 131 and a positioning portion 132 , the main body portion 131 is a horizontal plate-shaped body, the rear side of the main body portion 131 is fixedly connected to the sliding seat 112 , and the lower surface of the main body portion 131 During the downward movement, the battery 400 can be pressed against the top cover 420 of the battery 400 downwardly. Meanwhile, a mounting groove 1311 is vertically opened on the main body portion 131 , and the mounting groove 1311 is located just above the sealing nail 410 of the battery 400 . The positioning portion 132 is vertically provided with a through hole 1324, and the through hole 1324 is located just above the edge of the head of the sealing nail 410. In this way, the laser beam can be irradiated to the edge of the head of the sealing nail 410 through the through hole 1324, so that the The edge of the sealing nail 410 is welded to the top cover 420 of the battery 400 . At the same time, the pressing component 200 is vertically assembled at the center of the positioning portion 132 , and the pressing member 230 of the pressing component 200 is just vertically facing the center of the head of the sealing nail 410 .

The upper jig 130 adopts the above structure. First, the main body portion 131 and the positioning portion 132 are manufactured separately, wherein the size of the positioning portion 132 is small, which reduces the manufacturing difficulty of the positioning portion 132, thereby reducing the size of the upper jig 130. Manufacturing difficulty; second, the positioning portion 132 is detachably connected to the main body portion 131 , so that when the model of the battery 400 is changed, the position of the sealing pin 410 is changed. The operator can disassemble the positioning portion 132 on the main body portion 131 and replace other suitable positioning portions 132 (refer to FIG. 4 ), thereby adjusting the positions of the through hole 1324 and the pressing component 200 so that the pressing member 230 is just facing the sealing pin The center position of the head of 410, and the through hole 1324 is located just above the edge of the head of the sealing nail 410; thirdly, when the sealing nail 410 is welded, the generated waste sticks to the positioning part 132, and the operator can remove the positioning Part 132, so as to easily clean the waste on the positioning part 132; Fourth, the main body part 131 and the positioning part 132 are manufactured separately, and only the positioning part 132 needs to be made of copper material, so as to avoid welding. A lot of the waste scraps stick to the positioning part 132, which affects the welding of the sealing nail 410; and because the size of the main body part 131 is small, the waste of copper materials is avoided, and the manufacturing cost of the fixing device is saved; , the pressing assembly 200 is connected to the positioning portion 132 , therefore, the operator first disassembles the positioning portion 132 , so that the pressing assembly 200 on the positioning portion 132 can be easily replaced.

Instead of the positioning portion 132 being detachably connected to the main body portion 131 (not shown in the figure), the positioning portion 132 is movably connected to the main body portion 131 so as to be movable along the X-axis direction and the Y-axis direction. The main body parts 131 are arranged in parallel. Specifically, when the position of the sealing pin 410 of the battery 400 does not match the position of the positioning portion 132, the positioning portion 132 moves along the X-axis direction and the Y-axis direction, so that the positioning portion 132 can be adjusted to an appropriate position, thereby making the pressure The pressing part of the pressing part 230 faces the center of the head of the sealing nail 410 , and the through hole 1324 of the positioning part 132 is located just above the edge of the head of the sealing nail 410 . The laser beam can be irradiated to the edge of the head of the sealing pin 410 through the through hole 1324 to realize welding between the sealing pin 410 and the top cover 420 of the battery 400 .

In some embodiments, referring to FIGS. 2 and 4 , the positioning portion 132 includes a central body 1321 , a connecting rib 1322 and a peripheral body 1323 , the central body 1321 is located inside the peripheral body 1323 , and one end of the connecting rib 1322 is fixed to the side of the central body 1321 For connection, the other end of the connecting rib 1322 is fixedly connected to the inner wall of the outer peripheral body 1323 . In this way, the above-mentioned through hole 1324 is formed between the central body 1321 , the connecting rib 1322 and the outer peripheral body 1323 , and the pressing component 200 is fixedly connected to the central body 1321 ; wherein, there are multiple connecting ribs 1322, the connecting ribs 1322 are evenly distributed around the center body 1321, so that the positioning portion 132 is formed with a plurality of through holes 1324 around the center portion. For example, in FIG. 2 , there are two connecting ribs 1322 , and two evenly distributed through holes 1324 are formed on the positioning portion 132 . For example, in FIG. 4 , there are four connecting ribs 1322 , and four evenly distributed through holes 1324 are formed on the positioning portion 132 .

In some embodiments, referring to FIGS. 1 to 3 , the pressing assembly 200 further includes a fixing base 210 , one end of the elastic member 220 is connected to the fixing base 210 , and the other end of the elastic member 220 is connected to the pressing member 230 , and the elastic member 220 is connected to the pressing member 230 . The direction of the elastic force of the member 220 is toward the head of the sealing nail 410 . In this way, the pressing member 230 acts on the elastic member 220 , and the pressing member 230 elastically abuts on the sealing pin 410 of the battery 400 . Wherein, when the outer contour of the top cover 420 of the battery 400 is too high, the compression amount of the elastic member 220 is larger; when the outer contour of the top cover 420 of the battery 400 is lower, the compression amount of the elastic member 220 will be smaller.

Specifically, the fixing base 210 is provided with a guide hole 211 , and the port of the guide hole 211 is arranged toward the positioning fixture 100 , the pressing member 230 is a spherical body or a rod-shaped body, and the pressing member 230 slides vertically on the fixing seat 210 to press The surface of the piece 230 against which the sealing nail 410 abuts is an arc surface. It should be noted that, if the pressing member 230 is a spherical body, and the diameter of the port of the guide hole 211 is smaller than that between the fixing seats 210 , the pressing member 230 is always kept in the guide hole 211 . The elastic member 220 is a spring, the spring is vertically placed in the guide hole 211 , the lower end of the spring abuts against the pressing member 230 , and the upper end of the spring abuts against the bottom of the guide hole 211 . Therefore, under the action of the spring, the pressing member 230 is partially positioned outside the guide hole 211 through the port of the guide hole 211 , so that it can abut against the center of the head of the sealing nail 410 .

It can be understood that the pressing member 230 is a spherical body. Since the surface of the pressing member 230 is an arc surface, when the pressing member 230 squeezes the battery 400, it is not easy to cause damage to the sealing nail 410; When the 230 is pressed against the sealing nail 410 , the pressing member 230 can roll in the guide hole 211 , thereby further reducing the damage of the pressing member 230 to the sealing nail 410 .

It should be noted that, since the position of the fixing seat 210 close to the port of the guide hole 211 can be slightly elastically deformed, the pressing member 230 can slide into the guide hole 211 through the port of the guide hole 211 under the action of external force; or, The fixing base 210 is composed of a plurality of parts. After the fixing base 210 is disassembled, the fixing base 210 can be installed in the guide hole 211 (this is not described in detail).

Further, the pressing assembly 200 further includes a sliding member 240, the sliding member is placed in the guide hole 211 and slides vertically along the guide hole 211, the top of the sliding member 240 is fixedly connected with the lower end of the spring, the The lower surface is in contact with the spherical pressing member 230 . Through the setting of the sliding member 240 , the spring abuts the surface of the pressing member 230 through the sliding member 240 , so as to ensure that the spring stably presses the pressing member 230 downward, and the pressing member 240 is easier to roll on the surface of the sliding member 240 .

In some embodiments, the fixing base 210 is detachably connected to the positioning portion 132 , for example, the fixing base 210 is threadedly connected to the positioning portion 132 , and the fixing base 210 is fixed by external screws, for example. Specifically, since the fixing base 210 is detachably connected to the positioning portion 132 , the pressing member 230 , the elastic member 220 and the fixing base 210 can be assembled together first, thereby forming the assembled pressing assembly 200 . When assembling the fixing device on site, the compression assembly 200 can be directly assembled at the corresponding position of the positioning portion 132 , that is, the outer peripheral surface of the fixing seat 210 is screwed to the center of the positioning portion 132 , thereby completing the assembly of the compression assembly 200 . In addition, when the model of the pressing assembly 200 does not match the sealing pin 410 of the battery 400 , the operator can conveniently disassemble the fixing seat 210 to replace the pressing assembly 200 of another model.

In some embodiments, the pressing member 230 is made of a non-metallic material, so that when the pressing member 230 presses the head of the sealing nail 410 , the pressing member 230 is not easy to damage the sealing nail 410 .

According to the second aspect of the present invention, a welding device is disclosed. Referring to FIGS. 1 to 2 , it is used for welding of sealing nails 410 , including a frame 110 , a laser mechanism 300 and the above-mentioned fixing device. The laser mechanism 300 includes a laser head 310 , a laser The head 310 is installed on the upper part of the frame 110 and is located just above the upper jig 130 . The laser head 310 faces the through hole 1324 of the positioning portion 132 vertically.

Specifically, the battery 400 is vertically positioned on the positioning jig 100 , and the pressing member 230 presses the positioning sealing nail 410 under the action of the elastic force. The laser head 310 of the laser mechanism 300 emits a laser beam to the position between the edge of the sealing nail 410 and the top cover 420 of the battery 400 , so that the position between the edge of the sealing nail 410 and the top cover 420 of the battery 400 is preliminarily obtained. Welding, after the welding is completed, the battery 400 is transported to the next process, and the secondary welding of the sealing nail 410 is performed.

The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those of ordinary skill in the art, the present utility model can also be used without departing from the purpose of the present utility model. make various changes. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims (10)

1. A fixing device for fixing the sealing nail to the liquid injection hole of the battery, characterized in that it comprises: a positioning fixture capable of positioning the battery; a pressing component, comprising an elastic piece and a pressing piece, the elastic piece is connected with the pressing piece; Wherein, when the battery is positioned on the positioning jig, the pressing component can move in a direction close to the sealing nail, so that the pressing member is in contact with the head of the sealing nail, and The elastic member is elastically deformed, so that the pressing member elastically abuts against the head of the sealing nail. 2 . The fixing device according to claim 1 , wherein the pressing component comprises a fixing seat, and the elastic member and the pressing member are assembled on the fixing seat; 2 . The fixing device further includes a driving member, which is connected with the fixing base and is used for driving the fixing base to move toward or away from the positioning jig. 3 . The fixing device according to claim 2 , wherein the fixing base is provided with a guide hole, the pressing member slides on the guide hole, and at least part of the pressing member is located at the position of the guide hole. 4 . Externally, the elastic member is placed in the guide hole and abuts between the pressing member and the guide hole. 4 . The fixing device according to claim 3 , wherein the pressing member is a spherical body, and the diameter of the port of the guide hole is smaller than the diameter of the pressing member. 5 . 5 . The fixing device according to claim 2 , wherein the positioning jig comprises a lower jig and an upper jig, the lower jig is used for carrying the bottom of the battery, and the upper jig is used for carrying the bottom of the battery. 6 . a top cover for pressing the battery; The driving member is connected with the upper jig for driving the upper jig away from or close to the lower jig, and the fixing seat is integrally or detachably connected with the upper jig. 6 . The fixing device according to claim 5 , wherein the upper jig comprises a main body part and a positioning part, the driving part is connected with the main body part, and the main body part is located at the position of the driving part. 7 . Abutting with the top cover of the battery under the action; the positioning part is provided with a through hole for facing the edge of the sealing nail, and the fixing seat is connected with the positioning part; Wherein, the positioning part is detachably connected with the main body part. 7 . The fixing device according to claim 5 , wherein the upper jig comprises a main body part and a positioning part, the driving part is connected with the main body part, and the main body part is at the position of the driving part. 8 . Abutting with the top cover of the battery under the action; the positioning part is provided with a through hole for facing the edge of the sealing nail, and the fixing seat is connected with the positioning part; Wherein, the positioning part is movably connected to the main body part, so that the through hole can face the edge of the sealing nail. 8 . The fixing device according to claim 6 , wherein the positioning portion comprises a central body, a connecting rib and an outer peripheral body, and one end of the connecting rib is fixedly connected to a side surface of the central body. 9 . , the other end of the connecting rib is fixedly connected to the inner wall of the outer peripheral body, the through hole is formed between the central body, the connecting rib and the outer peripheral body, and the fixing seat is fixed to the central body connection; wherein, there are multiple connecting ribs, and the connecting ribs are evenly distributed around the center body. 9 . The fixing device according to claim 1 , wherein the pressing member has an arc-shaped surface for abutting with the head of the sealing nail. 10 . 10. Welding equipment, characterized in that it comprises: The fixing device of any one of claims 1 to 9; The laser mechanism includes a laser head, and the laser head is used for emitting a laser beam to the edge of the sealing nail of the battery.

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