CN108994436A - Lithium battery copper aluminium electrode welding procedure - Google Patents

Lithium battery copper aluminium electrode welding procedure Download PDF

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Publication number
CN108994436A
CN108994436A CN201810893599.4A CN201810893599A CN108994436A CN 108994436 A CN108994436 A CN 108994436A CN 201810893599 A CN201810893599 A CN 201810893599A CN 108994436 A CN108994436 A CN 108994436A
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CN
China
Prior art keywords
spot welding
lithium battery
welding head
electrode
fixed
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CN201810893599.4A
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Chinese (zh)
Inventor
龚秀军
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Taizhou Tianke Electronic Technology Co Ltd
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Taizhou Tianke Electronic Technology Co Ltd
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Application filed by Taizhou Tianke Electronic Technology Co Ltd filed Critical Taizhou Tianke Electronic Technology Co Ltd
Priority to CN201810893599.4A priority Critical patent/CN108994436A/en
Publication of CN108994436A publication Critical patent/CN108994436A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00Resistance welding; Severing by resistance heating
    • B23K11/10Spot welding; Stitch welding
    • B23K11/11Spot welding
    • B23K11/115Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00Resistance welding; Severing by resistance heating
    • B23K11/02Pressure butt welding

Abstract

The invention discloses a kind of lithium battery copper aluminium electrode welding procedures, are welded using the spot welding device of soft package lithium battery electrode, comprising the following steps: (1) fixed spot welding head, movable spot welding head are connected with mash welder;(2) spacing regulator is adjusted, to adjust the spacing between fixed spot welding head, movable spot welding head;(3) nickel alloy sheet or nickel alloy item are placed between lithium battery copper electrode, lithium battery aluminium electrode, and clamp fitting under parallel relative status by lithium battery copper electrode, lithium battery aluminium electrode;(4) movable spot welding head will clamp lithium battery copper electrode, nickel alloy sheet or the nickel alloy item of fitting under pressure actuated device driving, lithium battery aluminium electrode presses to fixed spot welding head;(5) mash welder output secondary voltage and electric current, secondary output voltage are 2.3~10V, secondary output current >=800A, while controlling secondary voltage and electric current release time in 200~300ms.The invention enables be connected firmly between each single lithium battery copper aluminium electrode of battery pack.

Description

Lithium battery copper aluminium electrode welding procedure
Technical field
The present invention relates to welding technology fields, and in particular to a kind of dissimilar material welding technique.
Background technique
With the development of battery technology especially lithium ion battery, the battery pack as composed by single lithium battery is as power supply Power supply both can be used as motive-power battery, can also be used as accumulation energy type battery, be widely used in electric vehicle, energy storage electricity It the fields such as stands.Single lithium battery just extremely aluminium flake, cathode are copper sheet.Single lithium battery is needed could group by concatenated mode At battery pack.Connection between each single lithium battery electrode be for the performance influence of battery pack it is biggish, the connection can It is closely related by property, internal resistance etc. and the stability and electric power output performance of battery pack.
In the prior art, following methods are connected between each single lithium battery electrode of battery pack: first is that monomer lithium Battery copper aluminium electrode uses Laser Welding or supersonic welding, and since the welding of copper aluminium electrode belongs to different-metal material welding, welding is tired Difficulty, Laser Welding or supersonic welding pad internal resistance are big, and aluminium is easily crisp, it is difficult to which overload is greater than the electric current of 100A, and welding effect is poor;Two Being single lithium battery copper aluminium electrode turns soldering after nickel using aluminium pole, and when soldering can generate up to 350 DEG C of high temperature, and the soldering time holds Continuous 15s or more, since heat transfer can cause irreversible damage to battery battery core;Third is that single lithium battery copper aluminium electrode uses riveting The connection types such as connect, which, which exists, rivets illusive problem, easily leads to junction connection resistance and increases, and when overcurrent generates Fever phenomenon, it is difficult to overload high current.
Summary of the invention
To connect between each single lithium battery copper aluminium electrode of battery pack in view of the deficiencies of the prior art, the present invention proposes one kind Connect securely, high current can be overloaded while avoiding the electricity generated when being directly connected between lithium battery copper electrode and lithium battery aluminium electrode Chemical attack reaction is welded using the lithium battery copper aluminium electrode that will not generate heat when not will increase connection internal resistance, overload current for a long time Connect technique.
The present invention is achieved through the following technical solutions technical goal.
Lithium battery copper aluminium electrode welding procedure, using the spot welding device of soft package lithium battery electrode, (spot welding device is this Shen Please unit identified patent applications number be 2018207786945 soft package lithium battery electrode spot welding device) welded.
The spot welding device of the soft package lithium battery electrode includes foundation structure, fixation spot welding head in the shape of a rod, in the shape of a rod Movable spot welding head, spacing regulator and pressure actuated device, the fixed spot welding head is relative to the foundation structure position It is fixed;When the pitch adjusting structure determines that the movable spot welding head does not push for adjusting, the end of the fixed spot welding head With the spacing of the end of the movable spot welding head;The pressure-driven structure is for driving the movable spot welding head to push in spot welding Object and/or the fixed spot welding head.
Optionally, the spot welding device further includes moving body, the relatively described basis of the first end of the moving body Structure is fixed, and the moving body can be rotated around the first end;The pitch adjusting structure and the pressure-driven structure It is respectively arranged on the two sides along direction of rotation of the moving body.
Optionally, the pitch adjusting structure includes helicitic texture and the first spring;
The first end of the helicitic texture is directly or indirectly connect with the foundation structure, the second end connection of the helicitic texture First spring, moving body described in the first spring direct or indirect connection, the helicitic texture is relative to the base The position of plinth structure and the pitch match;Or:
The first end of the helicitic texture is directly or indirectly connect with the moving body, the second end connection of the helicitic texture First spring, foundation structure described in the first spring direct or indirect connection, the helicitic texture is relative to the work The position of dynamic ontology and the pitch match.
Optionally, the pressure-driven structure includes cylinder and pressure controller, and the pressure controller is set to the gas Between cylinder and the moving body.
Optionally, the pressure controller includes connecting rod and second spring;
Cylinder described in the first end direct or indirect connection of the connecting rod, the second end of the connecting rod connect the second spring First end, moving body described in the second end direct or indirect connection of the second spring;Or:
The second end of moving body described in the first end direct or indirect connection of the connecting rod, the connecting rod connects second bullet The first end of spring, cylinder described in the second end direct or indirect connection of the second spring.
Optionally, the pitch adjusting structure is connected to the middle position of the moving body.
Optionally, the pressure-driven structure is connected to the position of the close second end of the moving body.
Optionally, the spot welding device further includes fixed ontology, and the fixed ontology is fixed at the basis knot Structure, the fixed spot welding head are set to the fixed ontology.
Optionally, the terminal edge of the movable spot welding head is equipped with molybdenum head or tungsten head.
Optionally, when the movable spot welding head is in normal place, the activity spot welding head is in the fixed spot welding head It is symmetrical.
Lithium battery copper aluminium electrode welding procedure, comprising the following steps:
(1) the fixed spot welding head, the movable spot welding head are connected with mash welder;
(2) spacing regulator is adjusted, to adjust the spacing between the fixed spot welding head, the movable spot welding head;
(3) a lithium battery copper electrode to be welded, another lithium battery aluminium electrode is parallel staggered relatively in the fixed weldering Between head and the movable spot welding head, nickel alloy sheet or nickel alloy item are placed on the lithium battery copper electrode, lithium battery aluminium electricity Between pole, and fitting is clamped under parallel relative status by the lithium battery copper electrode, lithium battery aluminium electrode;
(4) the lithium battery copper that the movable spot welding head will clamp fitting under pressure actuated device driving is electric Pole, nickel alloy sheet or nickel alloy item, lithium battery aluminium electrode press to the fixed spot welding head;
(5) mash welder output secondary voltage and electric current, secondary output voltage are 2.3~10V, secondary output current >= 800A, while secondary voltage and electric current release time are controlled in 200~300ms.
Act on lithium battery copper aluminium electrode welding procedure further improvement lies in that: pressure actuated device in the step (4) When driving by the pressure controller control the pressure between the movable spot welding head and the fixed spot welding head 50~ 200N。
The further improvement of effect lithium battery copper aluminium electrode welding procedure is: in the step (2), between adjustment is described Away from adjustment device, the spacing between the fixed spot welding head, the movable spot welding head is controlled in 2~20mm.
The further improvement of effect lithium battery copper aluminium electrode welding procedure is: the nickel alloy sheet or nickel alloy item are thick Degree is 0.2~0.6mm, is made of (according to weight percent) following raw materials according: 3~5% Ni, 7~14% Ge, 2~10% MGF2, 0.02~0.6% V, 18~36% Zn, remaining is Al.
Compared with prior art, the present invention having the positive effect that:
1, fixed spot welding head, movable spot welding head press lithium battery copper electrode, nickel alloy sheet or nickel alloy item, lithium battery aluminium electrode, The low-voltage of mash welder release, high current are melted in forming resistance heat between fixed spot welding head, movable spot welding head in the short time Nickel alloy sheet or nickel alloy item between lithium battery copper electrode, lithium battery aluminium electrode, nickel alloy sheet or nickel alloy item after thawing Form can securely be connect with lithium battery copper electrode, lithium battery aluminium electrode, in this way, being welded using lithium battery copper aluminium electrode of the invention Technique, so that being connected firmly between lithium battery copper electrode, lithium battery aluminium electrode, high current can be overloaded while avoiding lithium battery The electrochemical corrosion reaction that is generated when being directly connected between copper electrode, lithium battery aluminium electrode, for a long time using not will increase connection It will not generate heat when internal resistance, overload current.
2, the movable spot welding head is controlled by the pressure controller when pressure actuated device drives in the step (4) Pressure between the fixed spot welding head can make moving point soldering tip apply in 50~200N by the pressure controller of setting The pressure added will not be mutated, and protect the electrode 10 of soldered lithium battery, realize the perseverance between soft package lithium battery copper aluminium electrode 10 Pressure point weldering.
3, in the step (2), the spacing regulator is adjusted, by the fixed spot welding head, the movable spot welding head Between spacing control in 2~20mm, meet steric requirements various between lithium battery copper electrode, lithium battery aluminium electrode, into And it can avoid not protruding into progress spot welding weldering between lithium battery copper electrode, lithium battery aluminium electrode because existing welder volume is excessive The case where connecing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the spot welding device of soft package lithium battery electrode in the embodiment of the present invention one;
Fig. 2 is the application schematic diagram of the spot welding device of soft package lithium battery electrode in the embodiment of the present invention one;
Fig. 3 is the structural schematic diagram of one medium spacing of embodiment of the present invention adjustment structure;
Fig. 4 is the structural schematic diagram of pressure actuated device in the embodiment of the present invention one;
Fig. 5 is the structural schematic diagram of the soft package lithium battery welded using the lithium battery copper aluminium electrode welding procedure of embodiment two.
Description of symbols:
1- foundation structure;
2- fixes ontology;
3- moving body;
4- fixes spot welding head;
5- activity spot welding head;
6- pressure controller;
7- pitch adjusting structure;
8- cylinder;
9- molybdenum head;
10- soft package lithium battery copper aluminium electrode 10;
11- helicitic texture;
The first spring of 12-;
13- interconnecting piece;
14- connecting rod;
15- second spring;
16- shell;
101- lithium battery copper electrode;
102- lithium battery aluminium electrode;
103- nickel alloy sheet or nickel alloy item;
50- solder joint.
Specific embodiment
The invention will be further described below according to attached drawing and in conjunction with the embodiments.
Embodiment one: the embodiment of the spot welding device of soft package lithium battery electrode of the present invention
The spot welding device of 1-4 and in conjunction with the embodiments a pair of soft package lithium battery electrode of the present invention carries out clear with reference to the accompanying drawings Chu is fully described by.
Obviously, described embodiment is only spot welding device a part of soft package lithium battery electrode of the present invention Embodiment, instead of all the embodiments.Based on the embodiment of soft package lithium battery electrode of the present invention, this field is common Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects It encloses.
Description and claims of this specification and term " first ", " second ", " third " " in above-mentioned attached drawing The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage The data that solution uses in this way are interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to Here the sequence other than those of diagram or description is implemented.In addition, term " includes " and " having " and their any deformation, Be intended to cover it is non-exclusive include, for example, containing the process, method of a series of steps or units, system, product or setting It is standby those of to be not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for these mistakes The intrinsic other step or units of journey, method, product or equipment.
Below with specifically embodiment to the technical solution of the spot welding device of soft package lithium battery electrode of the present invention It is described in detail.These specific embodiments can be combined with each other below, can for the same or similar concept or process It can be repeated no more in some embodiments.
Fig. 1 is the structural schematic diagram of the spot welding device of soft package lithium battery electrode employed in the embodiment of the present invention one.Fig. 2 It is the application schematic diagram of the spot welding device of soft package lithium battery electrode employed in one embodiment of the invention one.
Please refer to Fig. 1 and Fig. 2, the spot welding device of soft package lithium battery electrode, comprising: foundation structure 1, fixed point in the shape of a rod Soldering tip 4, movable spot welding head 5 in the shape of a rod, spacing regulator 7 and pressure actuated device, the fixed spot welding head 4 relative to 1 position of foundation structure is fixed.
Foundation structure 1, it will be appreciated that for the structure of any achievable other component installation, in one of embodiment, base Plinth structure 1 can be mounting plate, meanwhile, in mounting plate, in order to be suitable for installation, it may be provided with hole, slot, the interconnecting piece etc. of multiplicity Structure.
Fixed spot welding head 4 and movable spot welding head 5, it will be appreciated that be the spot welding in the shape of a rod of arbitrary structures form, disposable type Head, fixed spot welding head 4 can be identical spot welding head with movable spot welding head 5, be also possible to different spot welding heads.Fixed spot welding head 4 are with the difference of movable spot welding head 5: the position of the comparative basis structure 1 of fixed spot welding head 4 is fixed, movable spot welding head 5 The position of comparative basis structure 1 can be variation, the mode of variation can be determined according to the demand of adjustment and driving.
The pressure-driven structure is pressed on spot welding object and/or the fixed point under the movable spot welding head 5 for driving Soldering tip 4.Wherein, the arbitrary motion mode that can be realized pushing specifically can for example be rotated all without departing from description of the invention scheme Movement, translational motion and the motion mode that can arbitrarily have pushing direction component motion.
The present embodiment may make that spot welding pressure is controllable by pressure-driven structure, so that solder joint is reliable and stable.
Spot welding object, it can be understood as the entity of any achievable spot welding.For example, can be soft package lithium battery copper aluminium electrode 10.As it can be seen that the space between soft package lithium battery copper aluminium electrode 10 may be smaller, it is unable to satisfy the biggish welder of volume.
The pitch adjusting structure 7, when determining that the movable spot welding head 5 does not push for adjusting, the fixed spot welding head 4 End and the movable spot welding head 5 end spacing, it is preferable that the fixed spot welding head 4, the movable spot welding head 5 it Between spacing control in 2~20mm.Wherein, the arbitrary motion mode that can be realized spacing variation is adjusted all without departing from spacing and is tied The function of structure 7 specifically such as rotary motion, translational motion and can arbitrarily have the movement side of spacing direction component motion Formula.
By pitch adjusting structure 7, the present embodiment meets steric requirements various between electrode, and then can avoid because of weldering The case where spot-welded is carried out between the excessive electrode that can not protrude into soft package lithium battery group of connection device volume.
As it can be seen that the spot welding device of soft package lithium battery electrode provided in this embodiment, is used for by the pitch adjusting structure When adjustment determines that the movable spot welding head does not push, between the end of the fixed spot welding head and the end of the movable spot welding head Away from and the pressure-driven structure for driving the movable spot welding head to push in spot welding object and/or the fixed spot welding Head realizes the control of pinpoint welding procedure, can effective guarantee welding effect relative to manual welding.
Fig. 1 and Fig. 2 are please referred to, the spot welding device may also include moving body 3, the first end of the moving body 3 The relatively described foundation structure 1 is fixed, and the moving body 3 can be rotated around the first end;The pitch adjusting structure 7 and institute State the two sides along direction of rotation that pressure-driven structure is respectively arranged on the moving body 3.
Moving body 3 can fix movable spot welding head 5 in the way of clamping.
By taking Fig. 1 and Fig. 2 as an example, pitch adjusting structure 7 can be supported on the downside of moving body 3, and pressure-driven structure can needle Pressure is applied to the upside of moving body 3, thus by pushing moving body 3, so that being pressed on fixed point weldering under movable spot welding head 5 First 4 and/or spot welding object.
In one of embodiment, the pitch adjusting structure 7 is connected to the middle position of the moving body 3.Institute State the position that pressure-driven structure is connected to the close second end of the moving body 3.In other alternative embodiments, spacing tune Whole structure 7 is also connected to the other positions of moving body 3, and pressure-driven structure is also connected to other positions of moving body 3 It sets.
Fig. 3 is the structural schematic diagram of one medium spacing of embodiment of the present invention adjustment structure.It is described in one of embodiment Pitch adjusting structure 7 may include helicitic texture 11 and the first spring 12.
In specific embodiment, referring to FIG. 3, the first end of the helicitic texture 11 is directly or indirectly tied with the basis Structure 1 connects, and the second end of the helicitic texture 11 connects first spring 12,12 direct or indirect connection of the first spring The moving body 3, position and the pitch match of the helicitic texture 11 relative to the foundation structure 1.
In another specific embodiment, the first end of the helicitic texture 11 directly or indirectly connects with the moving body 3 It connects, the second end of the helicitic texture connects first spring 12, base described in 12 direct or indirect connection of the first spring Plinth structure 1, position and the pitch match of the helicitic texture 11 relative to the moving body 3.
Helicitic texture 11 therein can be regarded as that position adjusting arbitrarily can be achieved, and utilize the structure of screw thread matching connection. Such as: if helicitic texture 11 is adjusting screw, adjusting screw can match access screw hole or other may be adapted to the knot of screw access Structure can adjust the spacing by the variation of the amount of access, in specific implementation process, screw hole or other may be adapted to screw access Structure can be directly arranged in foundation structure 1 or moving body 3, screw hole or other structures that may be adapted to screw access can also be set to solid Surely it is set to the interconnecting piece of foundation structure 1 or moving body 3.By taking Fig. 3 as an example, foundation structure 1 can be fixed with interconnecting piece 13, adjust Screw can be connected to the interconnecting piece 13.In specific implementation process, first inner chamber, the first inner chamber can be formed with inside interconnecting piece 13 The first spring 12 and/or helicitic texture 11 can be accommodated, interconnecting piece 13 can be equipped with and the matched screw hole of helicitic texture 11, first inner chamber Inner wall can also be used in for for helicitic texture 11 be oriented to, it may be assumed that one end of the first spring of connection 12 of helicitic texture 11 can have head Portion, the size on the head and the size of the first inner chamber match, so that the head can be along the first inner chamber Movement.
In one of embodiment, Fig. 1 and Fig. 2 are please referred to, the pressure-driven structure includes that cylinder 8 and pressure control Device 6, the pressure controller 6 are set between the cylinder 8 and the moving body 3.The moving body 3, can be by 8 band of cylinder It is dynamic, in swinging up and down posture.
It will not be mutated by the pressure that the pressure controller 6 of setting can make moving point soldering tip 5 apply, protection is soldered Lithium battery soft package lithium battery copper aluminium electrode 10, realize the constant pressure spot welding between soft package lithium battery copper aluminium electrode 10.Preferably, It is controlled between the movable spot welding head 5 and the fixed spot welding head 4 when pressure actuated device drives by the pressure controller 6 Pressure in 50~200N.
Fig. 4 is the structural schematic diagram of pressure actuated device in the embodiment of the present invention one.
In one of embodiment, the pressure controller 6 includes connecting rod 14 and second spring 15.
Cylinder 8 described in the first end direct or indirect connection of the connecting rod 14, the connecting rod 14 second end connection described in The first end of second spring 15, moving body 3 described in the second end direct or indirect connection of the second spring 15;Or: it asks With reference to Fig. 4, moving body 3 described in the first end direct or indirect connection of the connecting rod 14, the second end connection of the connecting rod 14 The first end of the second spring 15, cylinder 8 described in the second end direct or indirect connection of the second spring 15.
In specific implementation process, pressure controller 6 may also include shell 16, and can have in the shell 16 can accommodate The second inner chamber of two springs 15, meanwhile, the inner wall of second inner chamber can also be used to be oriented to for connecting rod 14, it may be assumed that the connection of connecting rod 14 the One end of two springs 15 can be equipped with end, and the size of the end and the size of the second inner chamber match, so that described End can be moved along the inner cavity.
Fig. 1 and Fig. 2 are please referred to, the spot welding device may also include fixed ontology 2, and the fixed ontology 2 is fixed at The foundation structure 1, the fixed spot welding head 4 are set to the fixed ontology 2.Fixed ontology 2 can be fixed in the way of clamping Fixed spot welding head 4.
In one of embodiment, the terminal edge of the activity spot welding head 5 is equipped in molybdenum head 9(other embodiments, institute The terminal edge for stating movable spot welding head 5 is equipped with tungsten head 9).
In one of embodiment, when the activity spot welding head 5 is in normal place, the activity spot welding head 5 and institute Fixed spot welding head 4 is stated to be symmetric.Normal place, it will be appreciated that adjust position without pitch adjusting structure 7, and not by under Position when pressure.
Fixed spot welding head 4 is mounted on fixed ontology 2, and the angle of the two can be in 71 °, and movable spot welding head 5 is mounted on work On dynamic ontology 3, the angle of the two can be in 71 °
The working principle of spot welding device involved in above embodiments can be with are as follows:
The electrode 10 of soldered soft package lithium battery is placed between fixed spot welding head 4 and movable spot welding head 5, by adjusting spacing Adjust the height of helicitic texture in structure 7, the spacing between fixed spot welding head 4 and movable spot welding head 5 be adjusted, when cylinder 8 to When lower movement, pressure controller 6 is passed motion to, is transmitted on moving body 3 via pressure controller 6, so that activity is originally Body 3 is swung at an angle, and then drive activity spot welding head 5 is mobile to fixed spot welding head 4, when dynamic spot welding head 5 and Soft Roll lithium electricity The electrode 10 in pond contacts and transmits pressure to when fixing spot welding head 4, completes pinpoint welding procedure, spot welding pressure can be by pressure controller 6 It is adjusted.
In conclusion the spot welding device of soft package lithium battery electrode of the present invention, passes through the pitch adjusting structure When determining that the movable spot welding head does not push for adjusting, the end of the end of the fixed spot welding head and the movable spot welding head Spacing and the pressure-driven structure for driving the movable spot welding head to push in spot welding object and/or the fixation Spot welding head realizes the control of pinpoint welding procedure, can effective guarantee welding effect relative to manual welding.
Meanwhile the spot welding device of soft package lithium battery electrode of the present invention meets electricity by pitch adjusting structure Various steric requirements between pole, and then can avoid because between the excessive electrode that can not protrude into soft package lithium battery group of welder volume The case where carrying out spot-welded.It may make that spot welding pressure is controllable by pressure-driven structure, so that solder joint is reliable and stable.
Embodiment two: one of the embodiment of lithium battery copper aluminium electrode welding procedure of the present invention
1-5 and two pairs of battery copper aluminium electrode welding procedures of the present invention are clearly and completely described in conjunction with the embodiments with reference to the accompanying drawings.
Lithium battery copper aluminium electrode welding procedure is carried out using the spot welding device of soft package lithium battery electrode described in embodiment one Welding, comprising the following steps:
(1) prepare the nickel alloy sheet 103 with a thickness of 0.2mm, the nickel alloy sheet 103 is made of following raw materials according (according to weight hundred Score): 3% Ni, 14% Ge, 2% MGF2, 0.02% V, 18% Zn, remaining is Al.
(2) the fixed spot welding head 4, the movable spot welding head 5 are connected with mash welder;
(3) adjust the spacing regulator 7, adjust spacing between the fixed spot welding head 4, the movable spot welding head 5 to 10mm;
(4) a lithium battery copper electrode 101 to be welded, another lithium battery aluminium electrode 102 is parallel staggered relatively described solid Between fixed pattern soldering tip 4 and the movable spot welding head 5, nickel alloy sheet 103 is placed on the lithium battery copper electrode 101, lithium battery Between aluminium electrode 102, and patch is clamped under parallel relative status by the lithium battery copper electrode 101, lithium battery aluminium electrode 102 It closes;
(5) the lithium battery copper that the movable spot welding head 5 will clamp fitting under pressure actuated device driving is electric Pole 101, nickel alloy sheet 103 or nickel alloy item 103, lithium battery aluminium electrode 102 press to the fixed spot welding head 4, the moving point Pressure between soldering tip 5 and the fixed spot welding head 4 is in 50N;
(6) a lithium battery copper electrode 101 to be welded, another lithium battery aluminium electrode 102 are welded, the mash welder is defeated Secondary voltage and electric current out, secondary output voltage 2.3V, secondary output current >=800A, while controlling secondary voltage and electric current Release time in 200ms, forms solder joint 50.
After welding, 103 form of nickel alloy sheet after thawing can securely be connect with lithium battery copper electrode, lithium battery aluminium electrode, So that being connected firmly between lithium battery copper electrode, lithium battery aluminium electrode, the electric current of maximum 500A can be overloaded, much larger than existing other The overload current of the maximum 100A of Weldability avoids lithium battery copper electrode simultaneously, production when lithium battery aluminium electrode is directly connected to Raw electrochemical corrosion is reacted, for a long time using generation heat when not will increase connection internal resistance, overload current less than or equal to 37 DEG C, Better than 55 DEG C of calorific values of existing other Weldabilities.
Embodiment three: the two of the embodiment of lithium battery copper aluminium electrode welding procedure of the present invention
1-5 and three pairs of battery copper aluminium electrode welding procedures of the present invention are clearly and completely described in conjunction with the embodiments with reference to the accompanying drawings.
Lithium battery copper aluminium electrode welding procedure is carried out using the spot welding device of soft package lithium battery electrode described in embodiment one Welding, comprising the following steps:
(1) prepare the nickel alloy item 103 with a thickness of 0.6mm, the nickel alloy item 103 is made of following raw materials according (according to weight hundred Score): 5% Ni, 7% Ge, 10% MGF2, 0.6% V, 36% Zn, remaining is Al.
(2) the fixed spot welding head 4, the movable spot welding head 5 are connected with mash welder;
(3) adjust the spacing regulator 7, adjust spacing between the fixed spot welding head 4, the movable spot welding head 5 to 20mm;
(4) a lithium battery copper electrode 101 to be welded, another lithium battery aluminium electrode 102 is parallel staggered relatively described solid Between fixed pattern soldering tip 4 and the movable spot welding head 5, nickel alloy item 103 is placed on the lithium battery copper electrode 101, lithium battery Between aluminium electrode 102, and patch is clamped under parallel relative status by the lithium battery copper electrode 101, lithium battery aluminium electrode 102 It closes;
(5) the lithium battery copper that the movable spot welding head 5 will clamp fitting under pressure actuated device driving is electric Pole 101, nickel alloy item 103 or nickel alloy item 103, lithium battery aluminium electrode 102 press to the fixed spot welding head 4, the moving point Pressure between soldering tip 5 and the fixed spot welding head 4 is in 200N;
(6) a lithium battery copper electrode 101 to be welded, another lithium battery aluminium electrode 102 are welded, the mash welder is defeated Secondary voltage and electric current out, secondary output voltage 10V, secondary output current >=800A, while controlling secondary voltage and electric current Release time in 300ms, forms solder joint 50.
After welding, 103 form of nickel alloy item after thawing can securely be connect with lithium battery copper electrode, lithium battery aluminium electrode, So that being connected firmly between lithium battery copper electrode, lithium battery aluminium electrode, the electric current of maximum 800A can be overloaded, much larger than existing other The overload current of the maximum 100A of Weldability avoids lithium battery copper electrode simultaneously, production when lithium battery aluminium electrode is directly connected to Raw electrochemical corrosion reaction is less than or equal to 37 DEG C using generation heat when not will increase connection internal resistance, overload current for a long time, Better than 55 DEG C of calorific values of existing other Weldabilities.

Claims (4)

1. a kind of lithium battery copper aluminium electrode welding procedure, is welded using the spot welding device of soft package lithium battery electrode, described soft The spot welding device of packet electrode of lithium cell includes foundation structure, fixation spot welding head in the shape of a rod, movable spot welding head in the shape of a rod, spacing Adjustment device and pressure actuated device, the fixed spot welding head are fixed relative to the foundation structure position;The spacing tune When whole structure determines that the movable spot welding head does not push for adjusting, the end of the fixed spot welding head and the movable spot welding head End spacing;The pressure-driven structure is for driving the movable spot welding head to push in spot welding object and/or described solid Pinpoint soldering tip;
It is characterized by comprising following steps:
(1) the fixed spot welding head, the movable spot welding head are connected with mash welder;
(2) spacing regulator is adjusted, to adjust the spacing between the fixed spot welding head, the movable spot welding head;
(3) a lithium battery copper electrode to be welded, another lithium battery aluminium electrode is parallel staggered relatively in the fixed weldering Between head and the movable spot welding head, nickel alloy sheet or nickel alloy item are placed on the lithium battery copper electrode, lithium battery aluminium electricity Between pole, and fitting is clamped under parallel relative status by the lithium battery copper electrode, lithium battery aluminium electrode;
(4) the lithium battery copper that the movable spot welding head will clamp fitting under pressure actuated device driving is electric Pole, nickel alloy sheet or nickel alloy item, lithium battery aluminium electrode press to the fixed spot welding head;
(5) mash welder output secondary voltage and electric current, secondary output voltage are 2.3~10V, secondary output current >= 800A, while secondary voltage and electric current release time are controlled in 200~300ms.
2. lithium battery copper aluminium electrode welding procedure according to claim 1, it is characterised in that: pressure in the step (4) The pressure between the movable spot welding head and the fixed spot welding head is controlled by the pressure controller when driving device drives In 50~200N.
3. lithium battery copper aluminium electrode welding procedure according to claim 1 or 2, it is characterised in that: in the step (2), The spacing regulator is adjusted, the spacing between the fixed spot welding head, the movable spot welding head is controlled in 2~20mm.
4. lithium battery copper aluminium electrode welding procedure according to claim 3, it is characterised in that: the nickel alloy sheet or nickel close Gold bar is made of following raw materials according (according to weight percent) with a thickness of 0.2~0.6mm: 3~5% Ni, 7~14% Ge, 2~ 10% MGF2, 0.02~0.6% V, 18~36% Zn, remaining is Al.
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