CN112388083A

CN112388083A - Welding pressing device

Info

Publication number: CN112388083A
Application number: CN202011333608.8A
Authority: CN
Inventors: 施敏捷; 乔永固; 唐凯华
Original assignee: Suzhou Jk Energy Technology Co ltd
Current assignee: Suzhou Jk Energy Technology Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-02-23
Also published as: WO2022110602A1

Abstract

The invention provides a welding pressing device which comprises a fixing plate, a pressing part and a first elastic piece. Wherein, the fixing plate is provided with at least one welding hole; the number of the pressing parts corresponds to that of the welding holes, the pressing parts are arranged on the fixing plate, the middle parts of the pressing parts are provided with abdicating holes which are communicated with the welding holes, and the bottoms of the pressing parts extend out of the fixing plate; one end of the first elastic piece is abutted against the fixed plate, and the other end of the first elastic piece is abutted against the pressing part. When the welding pressing device is used, the welding pressing device is placed on the battery module, the bottom of the pressing part is abutted to the upper portions of the copper bars and the lugs, the first elastic piece applies downward pressure to the pressing part to enable the first elastic piece to be pressed to the upper portions of the lug bending parts, the lug bending parts are enabled to be in close contact with the upper surface of the copper bars, and the lugs are prevented from being suspended; the laser head stretches into the welding hole and the abdicating hole to carry out laser welding, and the bending part of the lug is welded on the copper bar, so that the insufficient welding phenomenon is avoided; compared with manual soldering, the battery core is high in efficiency and cannot be damaged at high temperature.

Description

Welding pressing device

Technical Field

The invention relates to the technical field of lithium battery tab welding, in particular to a welding and pressing device.

Background

The soft-package lithium battery module adopts a manual soldering mode to weld the battery tab of the battery core and the copper bar with the fixing effect together, and then the series-parallel connection of the batteries is realized. The manual soldering mode is low in efficiency, the soldering temperature is high, the temperature rise of the battery core is too high due to continuous welding, the performance of the battery core is influenced, and even the battery core is damaged. Although the above-mentioned problem can be solved to the laser welding mode, nevertheless because utmost point ear is the butt in the copper bar top after buckling, utmost point ear portion of bending can't closely the butt on the copper bar when no external force is exerted pressure between the two, and the portion of bending can be partly unsettled in the copper bar top, and the rosin joint phenomenon appears during laser welding easily.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the electrode lug and the copper bar cannot be tightly abutted during laser welding to cause insufficient welding in the prior art.

To this end, the invention provides a welding hold-down device comprising

The fixing plate is provided with at least one welding hole;

the number of the pressing parts corresponds to that of the welding holes, the pressing parts are arranged on the fixing plate, the middle parts of the pressing parts are provided with abdicating holes, the abdicating holes are communicated with the welding holes, and the bottoms of the pressing parts extend out of the fixing plate;

and one end of the first elastic piece is abutted against the fixed plate, and the other end of the first elastic piece is abutted against the pressing part.

Optionally, in the welding pressing device, an outwardly protruding lug is arranged at the upper part of the pressing part, and the lug extends along the length direction of the pressing part; the hanging lug is inserted into the fixing plate, and the other end of the first elastic piece abuts against the hanging lug.

Optionally, in the welding and pressing device, the fixing plate includes an upper plate and a lower plate, the lower plate is fixed to the bottom of the upper plate, and the welding hole is disposed through the upper plate and the lower plate;

recessed areas recessed towards the respective interiors are formed in the opposite surfaces of the upper plate and the lower plate, and the recessed areas are located on the outer sides of the two ends of the welding hole; the two sunken areas are enclosed to form an installation space, and the hanging lugs are inserted in the installation space.

Optionally, in the welding and pressing device, a first groove is formed in the top surface of the suspension loop, a second groove is formed in the upper plate opposite to the suspension loop, and two end faces of the first elastic piece are respectively abutted to the bottom surfaces of the first groove and the second groove.

Optionally, in the welding and pressing device, at least one of the two ends of the abdicating hole is provided with an opening communicated with the outside.

Optionally, in the welding pressing device, the number of the welding holes is multiple, and the multiple welding holes are arranged on the upper plate in parallel and at equal intervals.

Optionally, the welding pressing device further includes at least one reinforcing member, the reinforcing member is disposed on the upper plate or the lower plate, and the reinforcing member extends along a length direction of the upper plate.

Optionally, the welding pressing device further comprises a clamping mechanism movably disposed on two sides of the fixing plate in the width direction, and the clamping mechanism comprises a fastening assembly adapted to lock the welding pressing device on the battery module.

Optionally, in the welding pressing device, the clamping mechanism includes two first side plates, and the first side plates are hinged to the upper plate; the fastening assembly is arranged on the first side plate.

Optionally, in the welding pressing device, the fastening assembly includes a fastening screw and a second elastic member; an annular boss is arranged in the middle of the fastening screw rod, and the fastening screw rod penetrates through the first side plate;

the second elastic piece is sleeved on the fastening screw rod, and two ends of the second elastic piece are respectively abutted against the first side plate and the annular boss; when the fastening screw rod is moved towards the outer side of the first side plate, the second elastic piece applies thrust towards the inner side of the first side plate towards the fastening screw rod.

The fixing plate is provided with at least one welding hole;

The technical scheme of the invention has the following advantages:

1. when the welding and compressing device provided by the invention is used, the welding and compressing device is placed on a battery module, the bottom of the compressing part is abutted to the upper parts of the copper bar and the lug, the first elastic part applies downward pressure to the compressing part to enable the compressing part to be compressed above the bending part of the lug, so that the bending part of the lug is in close contact with the upper surface of the copper bar, and the hanging is avoided; the laser head stretches into the welding hole and the abdicating hole to carry out laser welding, and the bending part of the lug is welded on the copper bar, so that the insufficient welding phenomenon is avoided; compared with manual soldering, the battery core is high in efficiency and cannot be damaged at high temperature.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a first angle schematic view of a welding hold-down device according to an embodiment of the present invention;

fig. 2 is a second angle schematic view of the welding pressing device provided in the embodiment of the present invention;

FIG. 3 is a view showing a state of use of the welding press apparatus;

FIG. 4 is a cross-sectional view of a welding fixture;

FIG. 5 is a cross-sectional view of the weld hold-down device with the hold-down member removed at the cut-away section;

FIG. 6 is a cross-sectional view of a portion of the fastener assembly;

FIG. 7 is a rear partial view of the upper plate;

FIG. 8 is a top partial schematic view of the lower plate;

FIG. 9 is a schematic view of a hold-down member;

fig. 10 is a schematic view of a hold-down member.

Description of reference numerals:

11-upper plate; 111-a second groove; 12-a lower plate; 13-welding holes; 14-installation space; 2-a pressing part; 21-a hole of abdication; 211-an opening; 22-a suspension loop; 221-a first groove; 3-a first elastic member; 4-a reinforcing component; 51-a first side panel; 521-fastening screw; 5211-annular boss; 522-a second elastic member; 53-a handle; 54-stop block.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Examples

The present embodiment provides a welding pressing device, as shown in fig. 1 to 3, which includes a fixing plate, a pressing part 2, and a first elastic member 3.

Wherein, the fixing plate is provided with at least one welding hole 13; the number of the pressing parts 2 corresponds to that of the welding holes 13, the pressing parts 2 are arranged on the fixing plate, the middle parts of the pressing parts 2 are provided with abdicating holes 21, the abdicating holes 21 are communicated with the welding holes 13, and the bottoms of the pressing parts 2 extend out of the fixing plate; one end of the first elastic element 3 is abutted against the fixed plate, and the other end is abutted against the pressing part 2.

When the welding pressing device is used, the welding pressing device is placed on the battery module, the bottom of the pressing part 2 is abutted to the upper portions of the copper bars and the lugs, the first elastic piece 3 applies downward pressure to the pressing part 2 to enable the pressing part to be pressed to the upper portions of the lug bending portions, the lug bending portions are enabled to be in close contact with the upper surfaces of the copper bars, and the lugs are prevented from being suspended; the laser head stretches into the welding hole 13 and the abdicating hole 21 to carry out laser welding, and the bending part of the lug is welded on the copper bar, so that the insufficient welding phenomenon is avoided; compared with manual soldering, the battery core is high in efficiency and cannot be damaged at high temperature.

Referring to fig. 9 and 10, the upper part of the pressing part 2 is provided with a hanging lug 22 protruding outwards, and the hanging lug 22 extends along the length direction of the pressing part 2; the pressing part 2 is inserted into the fixing plate through the hanging lug 22, and the other end of the first elastic part 3 abuts against the hanging lug 22.

Referring to fig. 4, 5, 7 and 8, the fixing plate includes an upper plate 11 and a lower plate 12, the lower plate 12 is fixed to the bottom of the upper plate 11 by screws, a welding hole 13 is formed through the upper plate 11 and the lower plate 12, the width of the lower plate 12 is smaller than that of the upper plate 11, and both sides of the lower plate 12 in the width direction are spaced from both ends of the upper plate 11 in the width direction by the same distance. The opposite surfaces of the upper plate 11 and the lower plate 12 are respectively provided with a sunken area sunken towards the respective inner part, and the sunken areas are positioned at the outer sides of two ends (two ends in the length direction of the welding hole 13) of the welding hole 13; the two recessed areas of the upper plate 11 and the lower plate 12 enclose a mounting space 14, the hanging lug 22 is inserted into the mounting space 14, and the bottom surface of the hanging lug 22 abuts against the lower plate 12 to fix the pressing part 2 between the upper plate 11 and the lower plate 12.

The top surface of the hanging lug 22 is provided with a first groove 221, the upper plate 11 opposite to the hanging lug 22 is provided with a second groove 111, two end surfaces of the first elastic member 3 are respectively abutted against the groove bottoms of the first groove 221 and the second groove 111, and the upper end and the lower end of the first elastic member 3 are respectively embedded in the first groove 221 and the second groove 111 to position the first elastic member 3. For example, the first elastic member 3 is a compression spring, and the compression spring applies downward pressure to the pressing member 2 to press the pressing member above the tab bending portion.

Referring to fig. 10, openings 211 communicated with the outside are formed at both ends (both ends in the length direction) of the abdicating hole 21 of the pressing part 2, and welding fume and hot gas can be timely discharged from the openings 211 during welding.

Referring to fig. 1 to 3 and 6, the welding press further includes a clamping mechanism including two first side plates 51, a fastening assembly, a handle 53, and a stopper 54. The two first side plates 51 are hinged to both sides of the upper plate 11. The fastening components have four groups, and the four groups of fastening components are respectively arranged at two ends of the two first side plates 51. Any group of fastening components comprises a fastening screw 521 and a second elastic piece 522, an annular boss 5211 is arranged in the middle of the fastening screw 521, the stop block 54 is arranged on the inner wall surface of the first side plate 51, the fastening screw 521 is arranged on the first side plate 51 and the stop block 54 in a penetrating manner, accommodating cavities for accommodating the second elastic piece 522 are arranged on the first side plate 51 and the stop block 54, the second elastic piece 522 is sleeved on the fastening screw 521, two ends of the second elastic piece 522 are respectively abutted to the first side plate 51 and the annular boss 5211, and the annular boss 5211 is abutted to the stop block 54.

Be equipped with the mounting hole on the panel beating support at battery module both ends, first curb plate 51 rotates to the battery module side, and fastening screw 521 wears to establish on the mounting hole to fix welding closing device on the battery module. The clamping mechanism pulls the upper plate 11 and the lower plate 12 from the side edge, so that the pressing part 2 is pressed on the tab bending part more tightly.

For example, the second elastic member 522 is a compression spring. During the installation fastening components, when first curb plate 51 rotates downwards to apart from battery module side certain distance, moves fastening screw 521 outward to first curb plate 51, and annular boss 5211 extrusion second elastic component 522 makes its compression, and when dog 54 butt was on the panel beating support, unclamp fastening screw 521, second elastic component 522 resets and impels the mounting hole of panel beating support with fastening screw 521, and the setting of second elastic component 522 is convenient for install clamping mechanism to the panel beating support on. The outer end of the fastening screw 521 is sleeved with a star-shaped handle 53, so that the hand-held operation is facilitated.

The upper plate 11 and the lower plate 12 are both in a shape of a long strip plate, a plurality of welding holes 13 are formed in the upper plate 11 and the lower plate 12, the welding holes 13 are arranged on the upper plate 11 and the lower plate 12 in parallel and at equal intervals, the number of the welding holes 13 and the number of the compression parts 2 are the same as the number of the lugs of the battery module, and the adjustment can be performed according to the number of the lugs. The welding and compressing device can compress and position all the tabs of the battery module at one time, and the compressing operation is convenient and fast. Because the upper plate 11 and the lower plate 12 are long and thin, two reinforcing members 4 are provided on the top surface of the upper plate 11, and the two reinforcing members 4 are respectively located on both sides of the top surface of the upper plate 11 in the width direction and extend in the length direction of the upper plate 11. The reinforcing member 4 is, for example, a reinforcing aluminum plate. The arrangement of the reinforcing component 4 can prevent the middle parts (the middle parts in the length direction of the upper plate 11) of the upper plate 11 and the lower plate 12 from arching, so that the middle pressing component 2 cannot press the tabs.

As a first alternative embodiment of the embodiment, the upper plate 11 and the lower plate 12 may be integrally formed, that is, the fixing plate is an integral structure, and the installation space 14 for the hanging lug 22 to be inserted is formed in the middle of the fixing plate.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A welding pressing device is characterized by comprising

A fixing plate provided with at least one welding hole (13);

the number of the pressing parts (2) corresponds to that of the welding holes (13), the pressing parts (2) are arranged on the fixing plate, the middle parts of the pressing parts (2) are provided with abdicating holes (21), the abdicating holes (21) are communicated with the welding holes (13), and the bottoms of the pressing parts (2) extend out of the fixing plate;

and a first elastic member (3) having one end abutting against the fixed plate and the other end abutting against the pressing member (2).

2. The welding pressing device according to claim 1, characterized in that the pressing part (2) is provided with an outward projecting lug (22) at the upper part, and the lug (22) extends along the length direction of the pressing part (2); the hanging lug (22) is inserted into the fixing plate, and the other end of the first elastic piece (3) abuts against the hanging lug (22).

3. The welding press according to claim 2, characterized in that the fixing plate comprises an upper plate (11) and a lower plate (12), the lower plate (12) being fixed to the bottom of the upper plate (11), the welding holes (13) being provided through the upper plate (11) and the lower plate (12);

the opposite surfaces of the upper plate (11) and the lower plate (12) are respectively provided with a sunken area sunken towards the inner part of each sunken area, and the sunken areas are positioned on the outer sides of two ends of the welding hole (13); the two sunken areas form an installation space (14), and the hanging lugs (22) are inserted in the installation space (14).

4. Welding pressing device according to claim 3, characterized in that the top surface of the suspension loop (22) is provided with a first groove (221), the upper plate (11) opposite to the suspension loop (22) is provided with a second groove (111), and two end surfaces of the first elastic element (3) respectively abut against the groove bottoms of the first groove (221) and the second groove (111).

5. Welding compression device according to any one of claims 1-4, characterised in that at least one of the two ends of the abdicating hole (21) is provided with an opening (211) communicating with the outside.

6. Welding press according to any one of claims 3-5, characterised in that said welding holes (13) are provided in a plurality, said welding holes (13) being arranged in parallel at equal intervals on said fixed plate (11).

7. Welding press according to claim 6, characterised in that it further comprises at least one reinforcement member (4), said reinforcement member (4) being provided on said upper plate (11) or said lower plate (12), said reinforcement member (4) extending in the length direction of said upper plate (11).

8. The welding fixture of any one of claims 3-7, further comprising a clamping mechanism movably disposed on either side of the width of the mounting plate, the clamping mechanism including a fastening assembly adapted to lock the welding fixture to a battery module.

9. Welding press according to claim 8, characterized in that said clamping mechanism comprises two first side plates (51), said first side plates (51) being hinged on said upper plate (11); the fastening assembly is arranged on the first side plate (51).

10. Welding press according to claim 9, characterised in that the fastening assembly comprises a fastening screw (521) and a second elastic element (522); an annular boss (5211) is arranged in the middle of the fastening screw rod (521), and the fastening screw rod (521) penetrates through the first side plate (51);

the second elastic piece (522) is sleeved on the fastening screw rod (521), and two ends of the second elastic piece (522) are respectively abutted against the first side plate (51) and the annular boss (5211); when the fastening screw (521) is moved outward of the first side plate (51), the second elastic member (522) applies a pushing force inward of the first side plate (51) toward the fastening screw (521).