CN219598382U - Battery cell welding fixture - Google Patents

Abstract

The utility model provides a battery cell welding fixture, and relates to the technical field of battery production. The battery cell welding fixture comprises a substrate, a first clamping jaw, a second clamping jaw, a driving piece and a transmission mechanism, wherein a placement position for placing a battery cell to be welded is placed on the first surface of the substrate, a lug welding area is arranged between two adjacent placement positions, the first clamping jaw and the second clamping jaw are arranged on the periphery of the substrate and are used for clamping the battery cell to be welded, under the limitation of the first clamping jaw, the central lines of the two battery cells to be welded are coincident, the driving piece and the transmission mechanism are both installed on the second surface, and are simultaneously connected with the driving piece, the first clamping jaw and the second clamping jaw, and the transmission mechanism drives the first clamping jaw and the second clamping jaw to open or close simultaneously under the driving of the driving piece. According to the utility model, through the limitation of the first clamping jaw, the central lines of the two battery cores to be welded are kept coincident, and the welding alignment degree of the electrode lugs is ensured. The problem of poor welding alignment of the tab due to inaccurate positioning of the central line of the battery cell with the welding is avoided.

Description

Battery cell welding fixture

Technical Field

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

Background

Two battery cells are arranged in the square aluminum shell lithium battery, and when the square aluminum shell lithium battery is produced, positive and negative electrode lugs of the two battery cells are required to be welded with connecting sheets through ultrasonic welding, so that the two battery cells are combined, and the purpose of capacity increase of the battery is achieved. The battery cell positioning is needed to be realized through a fixture in the welding process of the electrode lugs, and the purpose of the battery cell positioning is to ensure the welding quality and efficiency of the ultrasonic electrode lugs. However, in the clamping process, when the center lines of the two battery cells are positioned inaccurately, the welding alignment degree of the tabs is poor, and the processing yield is affected. Therefore, the scheme now provides a battery cell welding fixture.

Disclosure of Invention

Therefore, the utility model aims to provide a battery cell welding fixture, which aims to solve the technical problem of poor welding alignment degree of a tab caused by inaccurate positioning of a central line of a battery cell in the prior art.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

in a first aspect, an embodiment of the present utility model provides a die bonding jig, including:

the substrate comprises a first surface and a second surface which are oppositely arranged, wherein a placement position for placing a battery cell to be welded is arranged on the first surface, and a lug welding area is arranged between two adjacent placement positions;

the first clamping jaw and the second clamping jaw are arranged on the periphery of the substrate and used for clamping the to-be-welded electric core, and under the limitation of the first clamping jaw, the central lines of the two to-be-welded electric cores are overlapped;

the driving piece and the transmission mechanism are both arranged on the second surface, the transmission mechanism is simultaneously connected with the driving piece, the first clamping jaw and the second clamping jaw, and the transmission mechanism drives the first clamping jaw and the second clamping jaw to open or close simultaneously under the driving of the driving piece.

In one embodiment, a plurality of abutting blocks are symmetrically arranged on two sides of the tab welding area, the second clamping jaw comprises two second clamping blocks, the two second clamping blocks are respectively arranged at two ends of the substrate, and the two battery cells are respectively limited between the two second clamping blocks and the adjacent abutting blocks.

In one embodiment, the first clamping jaw has two and respectively clamps two electric cores, each first clamping jaw all includes two first clamp splice that set up relatively, the driving piece includes two opposite air cylinders that set up, two the output direction of air cylinder is opposite, every the output side of air cylinder all is connected with a drive mechanism, every drive mechanism all is connected with rather than the first clamping jaw and the second clamping jaw that the homonymy set up.

In one embodiment, the transmission mechanism comprises a slider, a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are both in sliding connection with the base plate, the slider is of an isosceles trapezoid structure and comprises an upper bottom edge, a lower bottom edge and two waist edges which are symmetrically arranged, the output end of the air cylinder is simultaneously connected with the lower bottom edge of the slider and the second connecting rod, the first connecting rod is two and oppositely arranged on two sides of the slider, the two first connecting rods are respectively connected with the first clamping blocks and the waist edges, and one end, away from the air cylinder, of the second connecting rod is connected with the second clamping blocks.

In one embodiment, the first link abuts the waist edge of the slider.

In one embodiment, two sliding grooves are formed in the sliding block relatively, the two sliding grooves are parallel to the adjacent waist edges respectively, a positioning pin is arranged at one end, close to the sliding block, of the first connecting rod, and the positioning pin penetrates through the sliding grooves.

In one embodiment, a second guide rail in sliding fit with the second connecting rod is fixedly arranged on the bottom side of the base plate, and the second connecting rod penetrates through the second guide rail and then is connected with the second clamping block.

In one embodiment, a first guide rail in sliding fit with the first connecting rod is fixedly arranged on the bottom side of the base plate, and the first connecting rod penetrates through the first guide rail and then is connected with the first clamping block.

In one embodiment, two elastic pieces are symmetrically arranged at one end of the sliding block, which is far away from the air cylinder, and two ends of each elastic piece are respectively connected with the sliding block and the first guide rail.

In one embodiment, the second face is further provided with a protective cover, and the driving member and the transmission mechanism are both defined within the protective cover.

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a battery cell welding fixture which can be used for tab welding operation when a plurality of battery cells are combined. The battery cell welding fixture comprises a substrate, a first clamping jaw, a second clamping jaw, a driving piece and a transmission mechanism, wherein a placement position for placing a battery cell to be welded is arranged on the first surface of the substrate, a lug welding area is arranged between every two adjacent placement positions, the first clamping jaw and the second clamping jaw are used for clamping the periphery side of the battery cell to be welded, the driving piece and the transmission mechanism are arranged on the second surface of the substrate, and the transmission mechanism is connected with the driving piece, the first clamping jaw and the second clamping jaw simultaneously. Therefore, under the drive of the driving piece, the transmission mechanism drives the first clamping jaw and the second clamping jaw to open or close simultaneously to clamp the battery cells, and when the electrode lugs of the two battery cells are welded together in the electrode lug welding area through ultrasonic waves, the center lines of the two battery cells to be welded are kept coincident due to the limitation of the first clamping jaw, so that the welding alignment degree of the electrode lugs is ensured. The problem of poor welding alignment of the tab due to inaccurate positioning of the central line of the battery cell with the welding is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 illustrates a schematic diagram of a transmission mechanism in some embodiments of the utility model;

FIG. 2 illustrates a schematic top view of a die-bonding jig according to some embodiments of the utility model;

FIG. 3 illustrates a schematic diagram of the front view of a die-bonding fixture in accordance with some embodiments of the present utility model;

FIG. 4 illustrates a schematic side view of a die-bonding jig in accordance with some embodiments of the utility model;

fig. 5 is a schematic diagram showing a connection structure of two cells according to some embodiments of the present utility model.

Description of main reference numerals:

110-a substrate; 120-driving member; 130-a first jaw; 140-a second jaw; 150-a transmission mechanism; 151-a slider; 152-a first link; 153 second link; 154-a chute; 155-a first rail; 156-a second rail; 160-an elastic member; 170-tab welding area; 180-abutting blocks; 190-protective cover.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

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

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

The embodiment of the utility model provides a battery cell welding fixture which can be used in the production process of a lithium battery, in particular to a tab welding operation when a plurality of battery cells are combined. According to the battery cell welding clamp, two battery cells to be welded are clamped and positioned through the clamping jaws, and the central lines of the adjacent two battery cells to be welded are always kept coincident in the welding process of the electrode lugs, so that the welding alignment degree of the electrode lugs is ensured. The problem of poor welding alignment of the tab due to inaccurate positioning of the central line of the battery cell with the welding is avoided.

It should be noted that, the battery cell provided by the embodiment of the utility model is a square battery cell.

As shown in fig. 1, the die-bonding fixture includes a base plate 110, a first clamping jaw 130, a second clamping jaw 140, a driving member 120 and a transmission mechanism 150, wherein the base plate 110 includes a first surface and a second surface which are oppositely arranged, a placement position for placing a die-bonded die is arranged on the first surface, and a tab welding area 170 is arranged between two adjacent placement positions. A first clamping jaw 130 and a second clamping jaw 140 are arranged on the periphery side of the substrate 110, and the electric core to be welded is clamped and positioned by the first clamping jaw 130 and the second clamping jaw 140. The second surface is provided with a driving piece 120 and a transmission mechanism 150, the transmission mechanism 150 is simultaneously connected with the driving piece 120, the first clamping jaw 130 and the second clamping jaw 140, and the transmission mechanism 150 drives the first clamping jaw 130 and the second clamping jaw 140 to simultaneously open or close under the driving of the driving piece 120.

As shown in fig. 4, specifically, a connecting piece is placed on the tab welding area 170, the battery cell to be welded is placed in the placement position, and the tab of the battery cell is placed on the connecting piece. The battery cell is square structure, and the bottom surface of battery cell sets up on the first face of base plate 110, and first clamping jaw 130 is located base plate 110 width direction's both sides, and second clamping jaw 140 is located base plate 110 length direction's both sides, under driving piece 120 and drive mechanism 150's effect, first clamping jaw 130 and second clamping jaw 140 carry out the centre gripping location to the battery cell, make the central line of two adjacent battery cells that wait to weld all align with base plate 110's length direction axis after, weld the utmost point ear of two battery cells through ultrasonic welding technique.

As shown in fig. 2, in some embodiments, a plurality of abutting blocks 180 are symmetrically disposed on two sides of the tab welding region 170, and the second clamping jaw 140 includes two second clamping blocks, where the two second clamping blocks are disposed on two opposite ends of the substrate 110.

Specifically, the second clamping blocks located at the same side are clamped and matched with the abutting blocks 180 by taking the center line of the width direction of the substrate 110 as a boundary, so that two opposite sides of the battery cells are clamped, and the two battery cells are respectively limited between the two second clamping blocks and the adjacent abutting blocks 180.

In this embodiment, the number of the abutment blocks 180 at each side is three to abut against the two ends and the center of the side edge of the battery cell, so that the stress of the battery cell is balanced, and the positioning deviation is reduced.

As shown in fig. 5, in some embodiments, the number of the to-be-welded electric cells is two, and the first clamping jaw 130 has two and respectively clamps the two electric cells.

Specifically, each first clamping jaw 130 includes two first clamping blocks that are oppositely disposed, the driving member 120 includes two cylinders that are oppositely disposed, and the two cylinders are symmetrically distributed with the center line of the width direction of the base plate 110 as an axis, so that the output directions of the cylinders are parallel to the length direction of the base plate 110, and the output directions of the two cylinders are opposite to each other, so as to maintain synchronous movement of the clamping jaws at two sides.

One transmission mechanism 150 is connected to the output side of each driving member 120, and each transmission mechanism 150 is connected to a first clamping jaw 130 and a second clamping jaw 140 disposed on the same side thereof. In operation, both cylinders are activated simultaneously to open the first jaw 130 and the second jaw 140 so that the external manipulator places the cells in the place.

Further, the transmission mechanism 150 includes a slider 151, a first link 152, and a second link, wherein the first link 152 and the second link are both slidably connected to the base plate 110. The sliding block 151 has an isosceles trapezoid structure, and includes an upper bottom edge, a lower bottom edge, and two waist edges symmetrically arranged. It should be noted that, the upper bottom edge is parallel to the lower bottom edge and the center line is coincident, the two waist edges are symmetrically arranged at the two sides of the upper bottom edge and the lower bottom edge, and the length of the lower bottom edge is greater than that of the upper bottom edge.

Specifically, the output end of the cylinder is connected with the lower bottom edge of the sliding block 151 and the second connecting rod at the same time, two first connecting rods 152 are oppositely arranged on two sides of the sliding block 151, the two first connecting rods 152 are respectively connected with the first clamping block and the waist edge, and one end of the second connecting rod, far away from the cylinder, is connected with the second clamping block.

Further, a first guide rail 155 slidably engaged with the first link 152 is fixedly disposed on the bottom side of the base plate 110, and the first link 152 is connected to the first clamping block after passing through the first guide rail 155.

Specifically, the first link 152 is moved by the guiding action of the first guide rail 155 to maintain the preset track of the first track during the movement. In this embodiment, the preset track of the first track is parallel to the width direction of the substrate 110. Under the action of the first connecting rod 152, the first clamping blocks clamp the two sides of the battery cell parallel to the width direction of the substrate 110.

Still further, a second guide rail 156 slidably engaged with the second link is fixedly disposed on the bottom side of the base plate 110, and the second link is connected to the second clamping block after passing through the second guide rail 156.

Specifically, the second link is moved by the guiding action of the second guide rail 156 to maintain the preset track of the second track during the movement. In this embodiment, the preset track of the second track is parallel to the length direction of the substrate 110. Under the action of the second connecting rod, one side of the battery cell is abutted against the abutting block 180, and the second clamping block clamps one side of the battery cell away from the abutting block 180.

In some embodiments, the first link 152 abuts the waist edge.

Specifically, during the operation of the cylinder, the output end of the cylinder moves the slider 151 and the second link in a direction away from the cylinder, and in the initial state, the first link 152 abuts against one end of the waist edge near the upper bottom edge, and as the slider 151 moves, the lower bottom edge near the first link 152, so as to push the first link 152 to extend to the outside of the substrate 110, so that the first clamping jaw 130 is opened.

In some embodiments, two sliding grooves 154 are formed on the sliding block 151 oppositely, the two sliding grooves 154 are parallel to the adjacent waist edges, a positioning pin is arranged at one end of the first connecting rod 152, which is close to the sliding block 151, and the positioning pin penetrates through the sliding grooves 154.

Specifically, as the cylinder pushes, the slider 151 moves to a side far from the cylinder, in the initial state, the positioning pin is located at an end of the chute 154 near the upper bottom edge, as the slider 151 moves, the lower bottom edge is close to the first link 152, and an end of the chute 154 near the lower bottom edge is close to the positioning pin, and the first link 152 extends to the outside of the base plate 110 under the limitation of the chute 154 and the positioning pin, so that the first clamping jaw 130 is opened.

Further, two elastic members 160 are symmetrically disposed at one end of the slider 151 far from the cylinder, one end of each elastic member 160 is connected with the slider 151, and the other end is connected with the first guide rail 155.

Specifically, by the arrangement of the elastic members 160, when the cylinder stops working, the elastic members 160 located at two sides of the sliding block 151 apply elastic force to the waist edge of the sliding block 151, so that the sliding block 151 moves in a direction approaching to the cylinder, and the first clamping jaw 130 and the second clamping jaw 140 form clamping force on the battery cell. Meanwhile, as the first clamping blocks and the elastic piece 160 are symmetrical relative to the central line of the base plate 110 in the length direction, the force applied by the first clamping jaw 130 to the two sides of the battery cell is the same, and the central line of the battery cell always coincides with the central line of the base plate 110 in the length direction.

Further, the elastic member 160 may be a coil spring or a gas spring. In this embodiment, the elastic member 160 is a coil spring.

As shown in fig. 3, in some embodiments, the second face is further provided with a protective cover 190, and both the driver 120 and the transmission 150 are defined within the protective cover 190.

Specifically, the protection cover 190 is detachably mounted on the second surface of the substrate 110, and the connection relationship between the protection cover 190 and the substrate 110 may be in a clamping connection, a bolting connection, or the like. In this embodiment, the protective cover 190 is connected to the substrate 110 by bolts. Through the setting of safety cover 190, make cylinder and drive mechanism 150 all be located the safety cover 190, reduce the entering of external material, reduce the damage of wherein parts, promote work piece life.

The working principle of the utility model is as follows:

firstly, the tab welding area 170 is placed on the connecting piece, the air cylinders are started, and the output ends of the two air cylinders drive the sliding blocks 151 and the second connecting rods on two sides to move simultaneously along opposite directions, so that the first clamping jaw 130 and the second clamping jaw 140 are opened. Then, two battery cores to be welded are sequentially placed on the placing position through an external manipulator, and the lugs of the battery cores are placed on the connecting sheet. Then, the cylinder is closed, the sliding block 151 moves toward the cylinder under the action of the elastic member 160, the second clamping jaw 140 applies pressure to the battery cell toward the cylinder, and the first clamping block applies clamping force to the battery cell under the limitation of the sliding groove 154 and the positioning pin. Because the second clamping jaw 140 and the elastic piece 160 are symmetrically distributed on the central line of the base plate 110, the force applied by the second clamping jaw 140 to the two sides of the battery cell is the same, so that the central lines of the two battery cells are always coincident with the central line of the base plate 110, the alignment degree of the battery cell lugs is ensured, and the processing yield of the battery is improved.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A die bonding fixture, comprising:

the substrate comprises a first surface and a second surface which are oppositely arranged, wherein a placement position for placing a battery cell to be welded is arranged on the first surface, and a lug welding area is arranged between two adjacent placement positions;

the first clamping jaw and the second clamping jaw are arranged on the periphery of the substrate and used for clamping the to-be-welded electric core, and under the limitation of the first clamping jaw, the central lines of the two to-be-welded electric cores are overlapped;

the driving piece and the transmission mechanism are both arranged on the second surface, the transmission mechanism is simultaneously connected with the driving piece, the first clamping jaw and the second clamping jaw, and the transmission mechanism drives the first clamping jaw and the second clamping jaw to open or close simultaneously under the driving of the driving piece.

2. The die bonding fixture according to claim 1, wherein a plurality of abutting blocks are symmetrically arranged on two sides of the tab bonding area, the second clamping jaw comprises two second clamping blocks, the two second clamping blocks are respectively arranged at two ends of the substrate, and the two dies are respectively limited between the two second clamping blocks and the adjacent abutting blocks.

3. The die bonding fixture according to claim 2, wherein the first clamping jaws are two and respectively clamp two dies, each first clamping jaw comprises two first clamping blocks which are oppositely arranged, the driving piece comprises two air cylinders which are oppositely arranged, the output directions of the two air cylinders are opposite, the output side of each air cylinder is connected with a transmission mechanism, and each transmission mechanism is connected with the first clamping jaw and the second clamping jaw which are arranged on the same side of each transmission mechanism.

4. The battery cell welding fixture of claim 3, wherein the transmission mechanism comprises a slider, a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are both in sliding connection with the substrate, the slider is of an isosceles trapezoid structure and comprises an upper bottom edge, a lower bottom edge and two waist edges which are symmetrically arranged, the output end of the air cylinder is simultaneously connected with the lower bottom edge of the slider and the second connecting rod, the first connecting rod is two and oppositely arranged on two sides of the slider, the two first connecting rods are respectively connected with the first clamping block and the waist edges, and one end, away from the air cylinder, of the second connecting rod is connected with the second clamping block.

5. The die bonding fixture according to claim 4, wherein the first link abuts a waist edge of the slider.

6. The battery cell welding fixture of claim 4, wherein two sliding grooves are formed in the sliding block relatively, the two sliding grooves are parallel to the adjacent waist edges respectively, a positioning pin is arranged at one end of the first connecting rod, which is close to the sliding block, and the positioning pin penetrates through the sliding grooves.

7. The die bonding fixture according to claim 6, wherein a second guide rail in sliding fit with the second connecting rod is fixedly arranged on the bottom side of the base plate, and the second connecting rod penetrates through the second guide rail and then is connected with the second clamping block.

8. The die bonding fixture according to claim 6, wherein a first guide rail slidably matched with the first link is fixedly arranged on the bottom side of the base plate, and the first link is connected with the first clamping block after penetrating through the first guide rail.

9. The die bonding fixture according to claim 8, wherein two elastic members are symmetrically arranged at one end of the slider away from the cylinder, and two ends of each elastic member are respectively connected with the slider and the first guide rail.

10. The die bonding fixture according to any one of claims 1 to 9, wherein the second face is provided with a protective cover within which the driver and transmission mechanism are both defined.