CN106463655A - Quadrangular cell case for vehicle cell and method for manufacturing same - Google Patents
Quadrangular cell case for vehicle cell and method for manufacturing same Download PDFInfo
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- CN106463655A CN106463655A CN201580027384.9A CN201580027384A CN106463655A CN 106463655 A CN106463655 A CN 106463655A CN 201580027384 A CN201580027384 A CN 201580027384A CN 106463655 A CN106463655 A CN 106463655A
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- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 17
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 40
- 230000008719 thickening Effects 0.000 claims description 63
- 238000012545 processing Methods 0.000 claims description 35
- 239000002994 raw material Substances 0.000 claims description 7
- 230000008961 swelling Effects 0.000 claims 2
- 238000003466 welding Methods 0.000 abstract description 96
- 239000011324 bead Substances 0.000 abstract description 45
- 238000007789 sealing Methods 0.000 description 29
- 230000035515 penetration Effects 0.000 description 14
- 230000004927 fusion Effects 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000010409 ironing Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000003672 processing method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 235000012771 pancakes Nutrition 0.000 description 1
- 230000000649 photocoagulation Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The present invention is a quadrangular cell case 1 for a vehicle cell, wherein a bottom part 6, lateral walls 2, 3, 4, 5, and an opening part 7 are integrally formed from one sheet of an aluminum alloy plate into a case that has each of these parts and is rectangular in transverse cross-section; and, before a lid is seal-welded to the opening 7, upper portions 2c, 3c, 4c, 5c of the lateral walls 2, 3, 4, 5 to be welded are locally increased in thickness so as to protrude into the cell case. The quadrangular cell case 1 for a vehicle cell is made of aluminum alloy, and it is possible to form a bead configuration that has stabilized during seal-welding, and to form sound weld portions.
Description
Technical field
The present invention relates to battery container alongside one another multiple and be assembled into the square of the on-vehicle battery that module uses
Battery container and manufacture method thereof.
Background technology
All the time, Li ion battery is mainly used in the field of mobile equipment such as mobile phone, notebook computer, but in recent years
Come, as automobile-use (vehicle-mounted), use in HV car, plug-in hybrid electric vehicle, electric automobile.
The Li ion battery of these automobile-uses needs bigger electric power, therefore in limited vehicle-mounted space by multiple batteries
Housing is arranged side by side each other, and is assembled into module and receives.Therefore, use easily be mutually juxtaposed, shape that Space is good,
And installation effectiveness is high and heat dispersion also excellent, avoid excessive temperature to rise becoming important.
Therefore, this battery container becomes width and the narrow limit face in the broadside face of shape of cross section rectangular (square), side
Big (minor face is much smaller than long limit) the pancake battery container of the ratio of width.Use slim rectangular cell as described above
The rectangular cell of housing is suitable to the slimming of equipment, lightness, and Space might as well.Hereinafter, will above such motor vehicle
Li ion cell casings be also referred to as the battery container or only of the square-shaped battery casing of on-vehicle battery, on-vehicle battery
It is referred to as square-shaped battery casing or battery container.
The square-shaped battery casing of on-vehicle battery as described above is extensively handled as follows：It is accommodated with electricity in inner space
The built-in parts such as pond paper tinsel, electrolyte, collector, utilize battery cover (hereinafter simply referred to as lid) to block described opening portion afterwards, use sharp
The described opening portion of battery container and the junction surface of battery cover are carried out sealing welding by photocoagulation.
All the time, in order to improve the feature of square-shaped battery casing as described above, it is proposed that various consideration square electrics
The example etc. of the distribution of the wall thickness of pond housing parts.
For example, in patent document 1, as the square-shaped battery casing of the portable sets such as mobile phone, mainly propose
There is the outer tinning of the metal made of iron such as cold-rolled steel sheet of carbon steel.In patent document 1, owing to being the purposes for single battery, because of
This square-shaped battery casing even after thin-walled property is also required to intensity, rigidity.Therefore, in order to improve sealing-strength, with will be by covering
Sealing, opening portion periphery wall upper thickness (mouth-sealed portion perimeter sides thickness) partial thickening is to than pars intermedia (constant wall thickness
Portion) the mode of thickness thick about about less than 25% make metal tinning outward.
Citation
Patent document
Patent document 1：Japanese Unexamined Patent Publication 11-54095 publication
Invention problem to be solved
Here, change the lid of the square-shaped battery casing of on-vehicle battery, main body (tank) into aluminium alloy system and by right from steel
Aluminium alloy plate (cold-reduced sheet) material carry out integrated punching shape formed products constitute when, from corrosion resistance, lightness and
It is all favourable from the aspect of processability, cost.Therefore, in recent years, constantly study.
In addition, the cost of the square-shaped battery casing for the on-vehicle battery that reduces aluminium alloy further, also constantly enter
The research of row thin-walled property.Specifically, have the thickness of slab of the sidewall of this battery container is subtracted from existing about 0.5～1.0mm
It is as thin as the trend of about 0.2～0.6mm.
But, in the case that the square-shaped battery casing of on-vehicle battery is set to aluminium alloy, described thin when pursuing
During wall, producing the unstable such problem of welding during the described sealing welding based on laser, this problem is in the situation of steel
Under do not exist, be the distinctive problem of aluminium alloy system.
That is, when the sidewall of thinning square-shaped battery casing, for weldability is than the aluminium alloy of steel difference, at described base
When the sealing of laser is welded, produce the thermal strain of plate.Therefore, and the welding that is similarly between the lid of aluminium alloy is unstable, connect
Head becomes wave mode or produces difference of height, thus becomes weld bead shape unstable as the sidewall running through weld part, right
The content of battery container has undesirable effect.Therefore, in order to become sound weld bead shape, weld part, need to make laser shine
Penetrate dislocation contraposition accurately etc. makes efficiency reduce such substantial amounts of amount of labour when sealing welding.
Though thinking that the fusing point of aluminium alloy is low, easily melting, but the specific heat of aluminium alloy and melted latent heat than steel, other are most
Number metals are big and excellent heat conductivity, and based on its effect, heat rate of release is 5 times of steel.Accordingly, it is difficult to local heating, in order to
Making it melted and needing to supply the heat far more than steel, this becomes, and the sealing welding described in making is unstable, become unstable weldering
The big factors of road shape.
Content of the invention
The present invention completes in view of problem as described above, it is intended that offer can stably be implemented described
Seal welding, sound on-vehicle battery square-shaped battery casing weld part, aluminium alloy and manufacture method thereof can be formed.
Solution
In order to reach above-mentioned purpose, the purport of the square-shaped battery casing of the on-vehicle battery of the present invention is：Former by one piece
Materials of aluminum alloy sheets is integrally formed as being respectively provided with the housing that bottom, sidewall, opening portion and shape of cross section are rectangle, and
On the basis of the thickness of described sidewall is turned to the scope of 0.2～0.6mm by thin-walled, the thickness of described bottom is in 0.6～1.0mm
Scope, the described sidewall wall thickening of ratio, the thickness on the top of described sidewall is by wall thickening partly in advance so that described sidewall
Top is stretched out towards the inner side of described housing.
In addition, in order to reach above-mentioned purpose, the master of the manufacture method of the square-shaped battery casing of the on-vehicle battery of the present invention
It is intended to：It is being square by integrally formed bottom, sidewall, opening portion and the shape of cross section of being respectively provided with of one piece of raw material aluminium alloy plate
During the housing of shape, on the basis of the thickness thin-walled of described sidewall is turned to the scope of 0.2～0.6mm, make the thickness of described bottom
Degree is in the scope of 0.6～1.0mm, the described sidewall wall thickening of ratio, by the thickness on the top of described sidewall heavy wall partly in advance
Change so that the top of described sidewall is stretched out towards the inner side of described housing.
Invention effect
The present invention utilize laser by the top of the sidewall of square-shaped battery casing that is made up of the formed body of aluminium alloy plate with
Before the lid of aluminium alloy carries out sealing welding, by flux matched to the thickness on the top of this sidewall and the formation of welding bead towards square
The inner side of battery container is than the thickness wall thickening partly in the constant wall thickness portion of this sidewall.
Thus, described sealing welding can stably be implemented, and can be formed throughout the top of sidewall and lid and not through side
Welding bead as the top of wall such that it is able to become sound weld part.
Brief description
Fig. 1 is the stereogram of a mode of the square-shaped battery casing illustrating the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Fig. 4 is the sectional view of a mode of the welding of the lid of the square-shaped battery casing illustrating the present invention.
Fig. 5 is the sectional view of other modes of the welding of the lid of the square-shaped battery casing illustrating the present invention.
Fig. 6 is the sectional view of a mode of the processing of the wall thickening of the sidewall of the square-shaped battery casing illustrating the present invention.
Fig. 7 is the sectional view of a mode of the welding of the lid illustrating existing square-shaped battery casing.
Fig. 8 is the sectional view of other modes of the welding of the lid illustrating existing square-shaped battery casing.
Fig. 9 is the section view of other preferred embodiments of the processing of the wall thickening of the sidewall of the square-shaped battery casing illustrating the present invention
Figure.
Detailed description of the invention
Hereinafter, referring to the drawings the preferred embodiment of the present invention is described in detail.It should be noted that in this explanation
In book and accompanying drawing, identical reference is marked for the inscape with substantially identical functional structure, thus omits
Repeat specification.
The essential structure of square-shaped battery casing：
Fig. 1～3 illustrate a pattern of the square-shaped battery casing of the present invention.The so-called square-shaped battery casing of the present invention refers to point
Not there is the aluminium alloy battery container that bottom, sidewall, opening portion and shape of cross section are rectangle.
In figs. 1 to 3, as premise, square-shaped battery casing 1 is used as on-vehicle battery.That is, this battery container 1 is each other simultaneously
Arrange multiple, and be assembled into module and use.Therefore, it from the efficiency in space, is set to be respectively provided with bottom, sidewall, opening
Portion and shape of cross section are the flat and slim aluminium alloy battery container of rectangle.
Square-shaped battery casing 1 is substantially by integrally having rectangle (vertical view is square) bottom the 6th, each from this rectangular base 6
Four each sidewalls that circumference erects the 2nd, the 3rd, the 4th, 5 and these each sidewalls the 2nd, the 3rd, the 4th, 5 the square of upper end 2a, 3a, 4a, 5a side
The square tube shape of shape opening portion 7 is constituted.
Also, in including following being documented in, the so-called rectangle of the present invention refers to rectangle or quadrangle, even if not being these
Shape self, is also the shape being similar to rectangle or quadrangle.
In the square-shaped battery casing 1 of Fig. 1～3, the 4th, sidewall 5 is to be positioned at the right of long side as relatively big and broadside wall
Two sidewalls put, the 2nd, sidewall 3 is opposed two sidewall that wall as less and narrow limit is positioned at short brink.These sidewalls
Wall configuration be square, and the ratio of the width of the wall of broadside and the width of the wall on narrow limit is big, and (short brink is much smaller than long limit
Side), thus constitute rectangle and flat slim battery container.
Thickness (thickness of slab) t6 of rectangular base 6 selects from the scope of 0.6～1.0mm, each sidewall the 2nd, the 3rd, the 4th, 5 constant wall thickness
Thickness (thickness of slab) t2, t3, t4, t5 of portion 2b, 3b, 4b, 5b selects from the scope of 0.2～0.6mm, makes the plate of uniform thickness of slab pass through
Described shape and phase mutual deviation thicknessization.That is, difference thick square tube shape different by the thickness of each part mentioned above is constituted.
The thickness of this rectangular base 6 intensity according to the battery container set up (rigidity) on the basis of by thin-walled property
Necessity, than described each sidewall wall thickening.In addition, the mutual close-packed arrays of multiple battery containers 1 and be assembled into module, adjacent electricity
The sidewall of pond housing adjoins one another, therefore intensity can ratio relatively low, each thickness t4, t5 of two sidewalls 4b, 5b of long side are also
Can be thinner than each thickness t2, t3 of the two of short brink sidewalls 2b, 3b.That is, as on-vehicle battery use, these rectangular bases the 6th, side
Wall 2～5 can make respective thickness mutually change in described scope each other, it is achieved difference thicknessization.
As general known production method, can be by uniform thickness (t1：0.5～1.2mm) one block of raw material aluminium close
Gold plate (cold-reduced sheet) by make drawing and after drawing thin grade to combine successively known to multistage forming and obtain in one piece
Above-mentioned square-shaped battery casing 1.Incidentally, above-mentioned multistage forming self is for example in patent No. 4119612 publication, patent
No. 4325515 publication, " plastic working 2, W. Johnson, P.B. Muller write altogether, and Showa training on October 30th, 40 wind shop is sent out
Row, ' 11 10 re-drawings with end container are processed ' 26-27 page etc. specifically records.Become the material of this square-shaped battery casing 1
Aluminium alloy plate select among alloy described later.
The assembling of lid：
As shown in Figure 4,5, the rectangular aperture portion 7 at square-shaped battery casing 1, is equipped with by different from square-shaped battery casing 1
Raw material aluminium alloy plate shape and overlook rectangular lid 8.Incidentally, lid 8 is not necessarily based upon the shaping of plate, also can lead to
Cross other preparation methods such as casting, forging, extruding to make.
This Fig. 4, the 5 use A-A sectional views of Fig. 1 and only illustrate partly to figure from the A-A section side of square-shaped battery casing 1
The square-shaped battery casing 1 of 1 is equipped with the pattern of lid 8.In the following description, the B-B section side for Fig. 1 also has same
Record, in this case, utilize bracket to add the reference of B-B section side after the reference of A-A section side.
This lid 8 has same or like rectangle (vertical view) shape of the rectangular shape of the vertical view with battery container top,
Be generally configured with as required for Li ion cell casings etc., the inlet of external positive, electrolyte, cover, safety valve etc. other
Necessary parts.Accordingly, it would be desirable to intensity (rigidity) high, ratio described each sidewall the 2nd, the 3rd, the 4th, 5 and rectangular base 6 wall thickening, it is thick
Degree (thickness of slab) t8 is in the scope of 1.0～2.0mm.The aluminium alloy plate of the material becoming this lid 8 also selects among alloy described later
Select.
As the assembling mode general when the assembling of this lid 8, use the lid mode that falls as Fig. 4 as representative.Tool
For body, there are as below methods for tool：It is contained in lid 8 in the space being surrounded by upper end 2a, 3a (4a, 5a) of each sidewall, 8 will be covered
It is placed in (coplanar) same horizontal plane of same level with upper end 2a, 3a (4a, 5a) of each sidewall.In addition, also have as
Lower method：Use Fig. 5 such load lid mode, be placed in lid 8 on upper end 2a, 3a (4a, 5a) of each sidewall, and cover this
The upper end of a little each sidewalls.
Assemble this lid 8 when, from by Fig. 4,5 arrow shown in welding direction throughout lid 8 length direction or vertical view
Under periphery, by the top of upper end 2a, 3a of circumference 8a, 8b and each sidewall to lid 8 for the laser welding or each sidewall
2c, 3c seal against each other welding.Wherein, Fig. 3,4 diagram, as described above, be only short brink sidewall the 2nd, 3 upper end 2a, 3a
Or top 2c, 3c.
Fig. 4 illustrate upper end 2a, 3a of circumference 8a, 8b and each sidewall towards lid 8 for the laser border (weld part), from
The sealing welding of top upper dozen mode that laser light incident line X as shown by arrows is incident like that to lower section.
Fig. 5 illustrates laser towards the top covering circumference 8a, 8b of 8 and upper end 2a, 3a of each sidewall or each sidewall
The border (weld part) of 2c, 3c, the by-blow mode that laser light incident line X as shown by arrows is incident like that from transverse horizontal ground close
Soldering and sealing connects.
At these Fig. 4, in 5, although not shown, but the sidewall in Fig. 1 the 4th, 5 upper end 4a, 5a, top 4c, 5c too
With lid 8 sealing welding.
The laser welding sealing in welding can use known means, as laser-beam welding machine, uses semiconductor to excite
Pulse transmits type YAG laser, disc type laser, optical-fiber laser etc. and irradiates the hot spot of laser welding and weld successively.For example, swashing
Light exports：200～500W, fibre diameter=0.1～0.4mm, speed of welding=10～20m/ minute, protective gas=Ar (0.1
～0.5L/s) etc. under the conditions of, weld continuously.
Welding bead is formed：
Carry out this sealing welding when, as shown in Figure 4,5, need formed throughout each sidewall top 2c, 3c (4c, 5c) with
Such as circumference 8a, 8b and its leading section 9a of lid 8 towards top 2c, 3c not through each sidewall inside battery container (4c,
Welding bead 9 stable and sound as 5c), thus engage.This welding bead 9 is formed as circumference 8a, 8b and institute throughout lid 8
Top 2c, 3c (4c, 5c) of stating each sidewall seal the part of welding, throughout lid and sidewall upper portion, the length side of side wall upper part
To or overlook under periphery.
But, make sidewall be in the conventional example that the scope of 0.2～0.6mm carries out thin-walled property with uniform thickness,
This sidewall is excessively thin, based on the sealing welding instability of laser.As described above, the specific heat of aluminium alloy and melted latent heat than steel, its
Its most metals is big, and excellent heat conductivity, and based on its effect, heat rate of release is 5 times of steel.Accordingly, as weld part
Sidewall 21 thinning, be more difficult to local and heat, in order to melted and need supply more more heat than steel, based on laser
Sealing welding become unstable.
Laser Welding Condition without explanation, close at the general laser of the vehicle battery housing of this aluminium alloy plate
In the condition and range that soldering and sealing connects, Fig. 4 described later, the fusion penetration H of the welding bead shown in 5 become more than the 80% of the thickness of these sidewalls.
Therefore, the thickness of sidewall 21 carries out thin-walled property in the scope of described 0.2～0.6mm, and the thickness of sidewall 21 is relative to welding bead
The surplus capacity of fusion penetration H fewer.And, in the described characteristic of aluminium alloy, according to increase laser output, fibre diameter, peak value
The welding condition of output, speed of welding etc., is easily formed as its front end 22a and runs through unstable as the top 21a of sidewall
The shape of welding bead 22.
Fig. 7,8 the existing thin-walled property that the top 21a of sidewall also has the thickness impartial with constant wall thickness portion is shown after
The weld part of sidewall 21.Such as this Fig. 7, shown in 8, when based on the sealing welding of laser welding unstable when, before being easily formed as it
End 22a runs through the shape of welding bead 22 unstable as the top 21a of sidewall.Above-mentioned situation is for the side of beating upper as Fig. 7
The welding that seals of by-blow mode as formula, Fig. 8 is all identical.
So, in the case of becoming the weld bead shape that its front end 22a runs through such instability, bond strength reduces,
And sputter thing to disperse inside battery container, cause bigger damage, infringement to the content of battery container.Therefore, in order to
Form weld bead shape, the weld part perfecting, need additionally to pay substantial amounts of labour, cost when sealing welding.More particularly,
In the past, in order to form sound weld bead shape, weld part, need to sacrifice welding efficiency, reduce welding current, speed of welding, adopt
With the more expensive bonding machine being subdivided into multistage welding sequence or high control precision.
The wall thickening of sidewall：
In contrast, in order to form described stable sound welding bead 9, in the present invention, by with lid 8 sealing welding,
Each sidewall the 2nd, the 3rd, the 4th, the top of 5 2c, 3c, 4c, 5c as shown in Figures 1 to 3 such, described seal before welding with each sidewall
The thickness of constant wall thickness portion 2b, 3b, 4b, 5b compares in advance wall thickening partly so that ratio fetches formation by described seal weld
The fusion penetration H of welding bead thick.
As shown in Figures 1 to 3, each top 2c, 3c, 4c, 5c of these each sidewalls is by wall thickening partly in advance so that only court
Stretch out to the inner side of square-shaped battery casing 1 or bloat.Therefore, the wall in the outside of each top 2c, 3c, 4c, 5c of each sidewall is excellent
As shown in Figures 1 to 3, the outer wall of constant wall thickness portion 2b, 3b, 4b, 5b with each sidewall is not caused by wall thickening identically in choosing
Heave, concavo-convex, but smooth wall.Additionally, the wall in the outside of each top 2c, 3c, 4c, 5c of each sidewall with described each perseverance
Determine the identical plane link of the outer wall of wall thickness, respectively constitute the smooth outside wall surface of square-shaped battery casing 1.
Here, the fusion penetration H of welding bead as at Fig. 4, in 5 diagram, be the incident direction with laser independently, be positioned at by arrow
On the extended line of the incident ray X of the laser shown in Tou, from welding bead to the 9a of its leading section for outer surface portion 9b of welding bead 9
Depth capacity (maximum fusion penetration).
The thickness (thickness of slab) of constant wall thickness portion 2b, 3b, 4b, 5b of each sidewall：T2, t3, t4, t5 as mentioned above from 0.2～
The scope of 0.6mm selects.In contrast, the thickness (thickness of slab) of top 2c, 3c, 4c, 5c of each sidewall：t2c、t3c、t4c、t5c
Thicker than thickness t2, t3, t4, the t5 in these constant wall thickness portions.As this target, the preferably local, flux matched ground with the formation of welding bead 9
Wall thickening so that thicker than the fusion penetration H of each welding bead in top 2c, 3c, 4c, 5c of these sidewalls.
Further, this wall thickening is thick partly in the way of the inner side (inner space) being only oriented towards square-shaped battery casing 1 is stretched out
Wall.The square-shaped battery casing of the present invention of Fig. 1 has wall thickening part 2c in the A-A sectional view of Fig. 2, the B-B of 3c and Fig. 3
Wall thickening part 4c in sectional view, 5c.
It by wall thickening as described above, is capable of stable laser welding.And, such as the right side institute of described Fig. 4,5
Show, be formed throughout sidewall top 2c, 3c (4c, 5c) and lid circumference 8a, 8b and its leading section 9a not through sidewall
Top 2c, 3c (4c, 5c) be such, stable and sound welding bead 9.
In addition, by the wall thickening of top 2c, 3c (4c, 5c) of sidewall, permit in the range of not through the top of sidewall
The fusion penetration H (or the size of the welding bead 9 allowing) of the welding bead 9 permitted becomes wall thickening with the original sidewall thickness from thin-walled property
Thickness and the effect that significantly increases is also bigger.
In addition, by by sidewall the 2nd, the 3rd, the 4th, each top 2c, 3c, 4c, 5c heavy wall partly of 5 turn to the fusion penetration H of welding bead 9 with
On, also have the effect that：The range of choice of welding condition, allowed band also expand, and are capable of stable welding, thus shape
Become stable and sound welding bead 9.
That is, make welding bead 9 relax not through allowed band top, sealing welding condition of sidewall, make welding condition steady
The effect of fixedization is also bigger.In the present invention, (also include covering the 8th, rectangular base in the essential structure with described square-shaped battery casing
6th, each thickness range of sidewall) premised on the basis of, be capable of stable laser welding.
Additionally, each top 2c, 3c, 4c, 5c of each sidewall stretch out with the inner side being only oriented towards square-shaped battery casing 1 or bloat
Mode wall thickening partly in advance.Therefore, the perseverance of the wall in the outside of these each side wall upper part 2c, 3c, 4c, 5c and each sidewall
Determine wall thickness 2b, the outside wall surface of 3b, 4b, 5b similarly become not by wall thickening cause heave, concavo-convex smooth wall.
That is, the wall in the outside of these sidewalls include each top 2c, 3c, 4c, 5c of the sidewall of wall thickening and smooth turn to identical flat
Face (coplanar).
As a result, link with the identical plane of the outside wall surface in the constant wall thickness portion with described each sidewall, structure can be distinguished
The smooth outside wall surface of squarely battery container 1.Accordingly, as the Li ion battery of automobile-use, also there is following feature：?
In limited vehicle-mounted space, easily loading multiple battery containers (outer wall) each other side by side, Space is good.
Each side wall upper part 2c as described above, 3c, 4c, 5c outside wall and each sidewall constant wall thickness portion 2b,
Planarization on same level for the outside wall surface of 3b, 4b, 5b not necessarily, but has an above-mentioned excellent Space.
Here, as battery container, in order to bear sound use, sealing weld part needs enough strength of joints.Should
Strength of joint depends on the fusion penetration H of welding bead 9.Laser Welding Condition is without explanation, in the sealing welding condition of general laser
In the range of, in order to ensure enough strength of joints, the fusion penetration H of welding bead preferably with respect to sidewall the 2nd, the 3rd, the 4th, 5 constant wall thickness portion
Thickness t2, t3, t4, t5 are more than the 60% of the thickness of these sidewalls, more preferably more than 80%.
But, at sidewall, the 2nd, the 3rd, the 4th, thickness t2, t3, t4, the t5 in constant wall thickness portion of 5 is relatively thin and is in 0.2～0.6mm's
In the case of scope, owing to producing thermal strain as described above when welding, therefore penetration becomes unstable so that welding bead runs through
A part for sidewall.
In order to solve such problem, need the wall thickness making the sealing weld part based on laser to locally increase, thus press down
Heat strain.And, the problem of welding as described above is the heat needing more than the situation of steel plate as described patent document 1
Problem specific to input, aluminium alloy plate.
Turn to the mesh thicker than the fusion penetration H of welding bead accordingly, as by top heavy section 2c, 3c, 4c, 5c heavy wall of these sidewalls
Mark, preferably by the thickness (thickness of slab) of top 2c, 3c, 4c, 5c of each sidewall：T2c, t3c, t4c, t5c heavy wall partly turns to side
Wall the 2nd, the 3rd, the 4th, 5 constant wall thickness portion thickness t2, t3, t4, t5 more than 30%, more preferably more than 40%.
In the case that the 2nd, the 3rd, the 4th, the thickness of constant wall thickness portion 2b, 3b, 4b, 5b of 5 is mutually different for sidewall, by wall thickening
The thickness in the constant wall thickness portion of sidewall self (the target sidewall of wall thickening) is respectively as benchmark.
For the consideration of the design limit of internal volume, the manufacturing limit of wall thickening, the upper limit of this wall thickening is set to 70%
Left and right.That is, the preferred scope of this wall thickening be described sidewall constant wall thickness portion thickness 130～170%, more preferably 140～
170%.
On the side wall the not enough sidewall of the wall thickening of portion 2c, 3c, 4c, 5c the 2nd, the 3rd, the 4th, 5 constant wall thickness portion thickness t2,
The 30% of t3, t4, t5 and in the case of the aluminium alloy plate of sidewall the 2nd, the 3rd, the 4th, the scope that the thickness of 5 is in 0.2～0.6mm, in institute
Stating under Laser Welding Condition, producing thermal strain, penetration, the welding bead degree of depth become unstable.Therefore, even if to increase laser output,
The welding condition of fibre diameter, peak value output, speed of welding etc. is corrected, and is easily formed and runs through side for its front end 22a
The top 21a of wall is such, Fig. 7, the shape of the unstable welding bead 22 shown in 8.
Incidentally, in described patent document 1, as square-shaped battery casing made of iron, as described above, strong in order to improve
Degree (rigidity), is set to thick for the side of the wall of the upper opening portion periphery being sealed by lid (mouth-sealed portion perimeter sides is thick) than pars intermedia
Side thickness thickens about about less than 25%.
As this patent document 1, do not recognize the problem sealing welding of the present invention, only improving cubic battery
In the case of the intensity of body, rigidity, owing to the cube of rigidity and thickness of slab proportionally increases, if therefore thickness of slab being thickened
10%, then rigidity can be improved more than 30%.
Therefore, for described patent document 1, completely without the wall thickening of more than 30% as the present invention, its
In record scope, about less than 25%, wall thickening little as far as possible, be directed to not hinder as its purpose is light-duty
Change.
But, as the present invention, for the weldering being formed as the top not through each sidewall for its leading section 9a, perfect
Road 9, needs to prevent thermal strain during welding, accordingly, it is considered to the thin-walled property of sidewall the 2nd, the 3rd, the 4th, 5 scripts, need bigger heavy wall
Change.
The development length (region) of top 2c, 3c, 4c, 5c of each sidewall of this wall thickening is in described battery container, welding
Precondition on the basis of, be preferably able at least cover (formation) scope that welding bead is involved, more preferably can cover weldering
The scope of the heat affected zone connecing.
Additionally, when the wall thickening of top 2c, 3c, 4c, 5c of these each sidewalls is towards the outside of square-shaped battery casing 1 shape
Become the concavo-convex of wall, thus hinder smoothing and the planarization of wall, it is therefore desirable to avoid this situation.In any case that is, also
Rather than thick towards the outside of square-shaped battery casing 1 towards inner side (inner space) wall thickening partly of square-shaped battery casing 1
Wall, each outside wall surface (outer surface of sidewall) of square-shaped battery casing 1 keeps smoothing and planarization.
It should be noted that this wall thickening can be formed with welding bead 9, the top of each sidewall for being welded by sealing
2c, 3c, 4c, 5c are each all, carry out throughout total length or full duration, it is also possible to be only formed with welding bead 9 being welded by sealing
Side wall upper part selectivity carry out.But, for the consideration of the relation of the operation difficulty etc. processed with wall thickening described later, also
Can make not seal top, the upper end wall thickening of each sidewall of welding.
The wall thickening processing of side wall upper part：
The wall thickening of sidewall as described above for example can be realized by the compression process of sidewall as shown in Figure 6.
Compression process shown in this Fig. 6 self is known, illustrates the top 3c of sidewall 3 towards the inner side wall thickening of battery container
Mode.
In figure 6, centered on the top 3c of the sidewall 3 of original uniform thickness, utilizing mould 12 from sidewall 3
Side, utilize core 11 on the basis of the inner side clamp sidewall 3 of sidewall 3, utilize the top from top to sidewall 3 for the cam configuration 10
3c is compressed processing, thus towards inner side (inner space) wall thickening partly of square-shaped battery casing 1.This compression process root
It is divided into multistage carrying out according to the degree of wall thickening.
By processing as described above, as shown in Figures 1 to 3, make each top 2c, 3c, 4c, 5c of each sidewall with the side of being only oriented towards
The mode that the inner side of shape battery container 1 is heaved wall thickening partly in advance.As a result, these each side wall upper part 2c, 3c, 4c,
The wall in the outside of 5c can become with the identical plane (coplanar) of the outside wall surface of constant wall thickness portion 2b, 3b, 4b, 5b with each sidewall
For not by wall thickening cause heave, concavo-convex smooth wall.
The preferred processing method of the wall thickening of side wall upper part：
As the processing method of each side wall upper part 2c, the wall thickening of 3c, 4c, 5c, Fig. 9 (a)～(e) according to manufacturing procedure by
Each sectional view illustrates the preferred processing method of the compression process than described Fig. 6.
The summary of this processing method is, by each side wall upper part 2c, the thickness of the wall thickening of 3c, 4c, 5c towards square electric
The inner side of pond housing 1 in advance partly wall thickening when, to each side wall upper part 2c, 3c, 4c, 5c top beyond, this sidewall
Position apply draw thin processing and thickness thinning.On the other hand, the top of described each sidewall do not apply described in draw thin processing and have
The thickness of sidewall originally, and the heavy section directly stretching out remaining as the outside towards square-shaped battery casing 1.
Then, on this basis, further to described sidewall the 2nd, the 3rd, the 4th, 5 top heavy section apply processing, make this thickness
The direction of stretching out in wall portion inverts inside square-shaped battery casing 1.And then, described sidewall the 2nd, the 3rd, the 4th, 5 the heavy section on top
The wall in outside is configured to be in the plane identical with the wall in the described outside drawing other sidewall positions after thin processing
Tabular surface.
Hereinafter, use Fig. 9 illustrate, Fig. 9 only illustrate as Fig. 9 (a) as wall thickening process before battery container,
I.e. shape of cross section is configured in substantially rectangular B-B section middle formed products, Fig. 1, long side sidewall the 4th, 5 and rectangle
Bottom 6 and rectangular aperture portion 7.
Therefore, in the explanation of following processing method, although the 4th, 5 carry out only for long side wall, but for described short
The 2nd, avris wall 3 is also carried out same processing, the whole sidewall of square-shaped battery casing 1 include described each side wall upper part heavy section 2c,
3c, 4c, 5c and be configured to same shape, construction.
Fig. 9 (b) illustrate with from sidewall the 4th, 5 outside ironing die the 13rd, 13 be inserted into battery container 1a from opening portion 7
The cooperation of the drift 14 of the inner space of (hereinafter simply referred to as housing), to sidewall the 4th, 5 top 4e, 5e beyond sidewall sections
4b, 5b implement to draw thin processing, the mode of the first operation successively.
In this first operation, part, sidewall 4b, 5b beyond described side wall upper part 4e, 5e draw thin adding by described
Work carries out thin-walled property.Therefore, only described side wall upper part 4e, the part of 5e are not drawn thin processing, remain as original sidewall
4th, each thickness of slab (wall thickness) of 5, compared with the part of other sidewalls 4b, 5b after drawing thin processing, heavy wall turns to have court partly
To the shape of the protuberance that the outside of housing is stretched out.
Fig. 9 (c), (d), (e) illustrate and stretch out direction court in order to make the wall thickening (heavy section) of described side wall upper part 4e, 5e
, the pattern of second operation that direction inverts from stretching out of the described outside towards housing to the inner side of housing.
In Fig. 9 (c), first, it is inserted into drift 15 from opening portion 7 to housing.
It follows that as shown in Fig. 9 (d), make the drift 15 being inserted in housing decline, in the lower section being configured at drift 15
Surrounding ring-shaped sleeve 16 inner space (internal face) bottom side arrange pore 16c be inserted into its bar-shaped front end
Portion 15b.
Then, to ring-shaped sleeve 16 internal face, be formed at described pore 16c top funnelform (downwards
Undergauge) tapering 16b, funnelform (undergauge downwards) tapering of the top that is positioned at leading section 15b of pressing drift 15
15a, makes ring-shaped sleeve 16 (tapering 16b) open in left-right direction and expanding.
Meanwhile, as Fig. 9 (d), side wall upper part 4e after the wall thickening of lateral, 5e (the heavy section 4e of side wall upper part,
Wall pressing ironing die the 18th, 18 5e).Then, on the other hand, the lead of shaped outer circumferential portion 17 along the top being located at drift 15 is made
The top of the interior sidewall surface with heavy section 4e, 5e of side wall upper part for the tabular surface that vertical direction extends abuts.In addition, make to be located at ring-type
The bottom of the inner side with heavy section 4e, 5e of side wall upper part for periphery, the expanding downwards tapering 16a on the top of sleeve 16 is supported
Connect.
Then, pressing and the phase therewith of ironing die the 18th, the wall of 18 heavy section 4e, 5e towards side wall upper part are carried out
Heavy section 4e, 5e of the side wall upper part of companion is towards the described tabular surface of shaped outer circumferential portion 17, the tapering 16a on ring-shaped sleeve 16 top
Crimping.
Under these effects, in order to make the direction of wall thickening of heavy section 4e, 5e of side wall upper part from described housing
Side is stretched out to the inner side direction towards described housing and is carried out inverting (depression), and the lateral direction being configured to have towards housing is stretched
Heavy section 4c, the 5c shape, side wall upper part of the protuberance going out.
Meanwhile, the wall in the outside of heavy section 4e, 5e (4c, 5c) of side wall upper part also is shaped to, and in described Fig. 9 (b)
Draw plane (coplanar) that the wall in outside of other sidewalls 4b, 5b part after thin processing is identical, be i.e. extends in the vertical direction
Smooth wall.
In addition, meanwhile, by the tabular surface of described shaped outer circumferential portion 17, by heavy section 4e, 5e of side wall upper part
The upper side of (4c, 5c) is configured to the smooth wall being extends in the vertical direction, and passes through described tapering expanding downwards
The lower side of heavy section 4e, 5e (4c, 5c) of side wall upper part is configured to internal face tapering 4d expanding downwards by 16a.
Here, as described ironing die the 18th, 18, it is possible to use described Fig. 9 (b) is drawn the ironing die that thin processing is used
13rd, 13, it is possible to use other ironing die.
After drawing thin processing above-mentioned second, so that the side of drift 15 becomes the side of smooth (uniform external diameter of length direction)
Formula is controlled by cam mechanism, thus makes drift in the case of not making and deform to the part of described case inside wall thickening
Depart from.
After the shaping of heavy section 4e, 5e that Fig. 9 (e) is shown in side wall upper part described above terminates, utilize this cam machine
Structure takes out the mode of drift 15 from opening portion 7.
That is, contrary with described Fig. 9 (d), make the drift 15 being inserted in housing increase, from configuration in the lower section of drift 15
Its leading section 15b is extracted out in the hole 16c of ring-shaped sleeve 16.Then, discharge from the pressing of the funnelform tapering 15a of drift 15
The tapering 16b of ring-shaped sleeve 16, makes ring-shaped sleeve 16 undergauge, easily transfers to drift 15 in housing.
A series of processing method described above, Fig. 9 can directly apply to other each side wall upper part 2c, the thickness of 3c
The processing in wall portion.
In the processing method of Fig. 9, to sidewall the 4th, 5, beyond top 4e, 5e, sidewall position 4b, 5b implement to draw thin processing
And thinning thickness of slab, this side wall upper part 4e, 5e (heavy section 4c, 5c) are not applied described in draw thin processing, it is original for directly remaining
Sidewall the 4th, 5 each thickness of slab (wall thickness).
Can easily carry out as described above only by side wall upper part partly to the processing of hull outside wall thickening, such as institute
The compression process stating Fig. 6 is such, owing to without applying bigger compression stress to sidewall, therefore the possibility of sidewalls flex reduces,
Have can efficiently local wall thickening advantage.
In addition, by draw thin processing and the sidewall sections of thin-walled property also by processing solidification realize high intensity, therefore with
The intensity reducing sidewall sections together of thickness of slab reduces less.
Or, the selection of thin processing capacity formed, draw according to aluminium alloy, the degree of solidification is processed in control, even if sidewall sections
Thin-walled property, it is also possible to realize higher intensity.
These advantages other each side wall upper part 2c, the heavy section of 3c processing in be also identical.
It follows that in order to the direction of wall thickening of heavy section 4e, 5e of making the side wall upper part being temporarily forming is towards housing
Inner side direction and also easy from the lateral direction of described housing reversion (depression) the processing becoming heavy section 4c, 5c.
And, meanwhile, by smooth for the wall in the outside of side wall upper part heavy section 4e, 5e turn to described Fig. 9 (b) in draw thin
It is also easy that the wall in the outside of other sidewalls 4b, 5b part after processing becomes conplane shaping.
These advantages other each side wall upper part 2c, the heavy section of 3c processing in be also identical.
Additionally, a series of manufacturing procedure of above-mentioned Fig. 9 can be by only by the fortune up and down of each drift using and Ge Mo
Dynamic constitute, one-level or the processing of multistage continuous print are carried out.Shape therefore, it is possible to be easily assembled in common battery container
The multiple position press being used, has the advantage that can process efficiently and at a low price.
The battery container 1a obtaining in the manufacturing procedure of above-mentioned Fig. 9 is also square by be made up of the formed body of aluminium alloy plate
Being formed flux matchedly towards in square-shaped battery casing of the thickness of top 2c, 3c, 4c, 5c of the sidewall of battery container and welding bead
The thickness that side heavy wall partly turns to the constant wall thickness portion than this sidewall is thick.
Thus, when carrying out sealing welding by the lid 8 (not shown in fig .9) to aluminium alloy for the laser, can stablize
This sealing welding is implemented on ground, can form described Fig. 4, the welding bead 9 shown in 5, can become sound weld part.
That is, such as described Fig. 4, shown in 5, can be formed throughout top 2c, 3c, 4c, 5c of sidewall and lid 8 and not through side
Welding bead 9 as top 2c, 3c, 4c, 5c of wall.
And, can beyond making the heavy section of top 2c, 3c, 4c, 5c of sidewall thin-walled property, save use material,
These effects are realized on the basis of reducing material cost.
Raw material aluminium alloy plate：
Described raw material aluminium alloy plate intensity as required and formability, corrosion resistance, creep resistant (the resistance to deformation of creep
Property) and seal weldability etc. and select as the requirement characteristic of square-shaped battery casing material.
With regard to this point, the mechanical property under room temperature, preferably 0.2% yield strength is 30～200MPa and always stretches
Long rate be 3～20% such, the 1000 of JIS or AA defined be or 3000 aluminium alloy plates being.Wherein, it is preferably
A3003 aluminium alloy, 1000 line aluminium alloys of JIS or AA defined, wherein, in the case of using Laser Welding to fetch sealing,
A1050 alloy preferably as pure aluminum alloy.
It is solid that the cold-reduced sheet of uniform thickness is implemented solution treatment and Quenching Treatment, timeliness by these aluminium alloy plates as required
The modifier treatment such as change process or annealing and become described characteristic.But it is also possible to according to the condition of use, molding condition, use
Improve further the alloy of the creep resistant (the resistance to deformation of creep) etc. of these alloys, 2000 be or higher intensity 5000
System, 6000 line aluminium alloys.
Industrial applicibility
As described above, the present invention can provide described seal welding when formed stable weld bead shape, formed sound
The on-vehicle battery square-shaped battery casing of the aluminium alloy of weld part and manufacture method thereof.Therefore, it is possible to preferable use is vehicle-mounted
Square-shaped battery casing and manufacture method.
Description of reference numerals：
1：Battery container；2、3、4、5：Sidewall；2a、3a、4a、5a：Sidewall upper portion；2b、3b、4b、5b：Sidewall constant wall
Thickness portion；2c、3c、4c、5c：Side wall upper part (heavy section)；6：Rectangular base；7：Rectangular aperture portion；8：Lid；9：Welding bead；9a：Welding bead
Leading section；9b：Welding bead outer surface；10：Cam configuration；11：Core；12：Mould；14、15：Drift；13、18：Ironing die；16：
Ring-shaped sleeve；17：Shaped outer circumferential portion；H：Welding bead fusion penetration；X：Laser light incident line.
Claims (8)
1. an on-vehicle battery square-shaped battery casing, it is characterised in that
Described on-vehicle battery square-shaped battery casing is integrally formed as being respectively provided with bottom, side by one piece of raw material aluminium alloy plate
Wall, opening portion and shape of cross section are the housing of rectangle, and are turned to 0.2mm～0.6mm at the thickness of described sidewall by thin-walled
Scope on the basis of, the thickness of described bottom is in the scope of 0.6mm～1.0mm, the described sidewall wall thickening of ratio, described sidewall
The thickness on top by wall thickening partly in advance so that the top of described sidewall is stretched out towards the inner side of described housing.
2. on-vehicle battery square-shaped battery casing according to claim 1, wherein,
The thickness on the top of described sidewall is by wall thickening partly in advance, and amount of swelling is the thickness in the constant wall thickness portion of this sidewall
More than 30%.
3. on-vehicle battery square-shaped battery casing according to claim 1 and 2, wherein,
The top of the described sidewall that the wall in the outside of described sidewall comprises wall thickening and smooth turn to same plane.
4. the manufacture method of an on-vehicle battery square-shaped battery casing, it is characterised in that
It is being rectangle by integrally formed bottom, sidewall, opening portion and the shape of cross section of being respectively provided with of one piece of raw material aluminium alloy plate
Housing when, on the basis of the thickness thin-walled of described sidewall is turned to the scope of 0.2mm～0.6mm, make the thickness of described bottom
Degree is in the scope of 0.6mm～1.0mm, and the described sidewall wall thickening of ratio is thick partly in advance by the thickness on the top of described sidewall
Wall so that the top of described sidewall is stretched out towards the inner side of described housing.
5. the manufacture method of on-vehicle battery square-shaped battery casing according to claim 4, wherein,
By the thickness on the top of described sidewall wall thickening partly in advance, amount of swelling is the thickness in the constant wall thickness portion of this sidewall
More than 30%.
6. the manufacture method of the on-vehicle battery square-shaped battery casing according to claim 4 or 5, wherein,
When by the thickness on the top of described sidewall towards the inner side wall thickening partly in advance of described housing, to described sidewall
Position beyond top applies to draw thin processing to make thickness thinning, on the other hand, the top of described sidewall do not apply described in draw thin
Processing, has the thickness of original sidewall and directly gives over to the heavy section stretching out towards the outside of described housing, basis at this
On, processing is applied to the heavy section on the top of described sidewall, makes the direction of stretching out of described heavy section be reversed to towards described housing
Inner side.
7. the manufacture method of the on-vehicle battery square-shaped battery casing according to claim 4 or 5, wherein,
Described draw thin processing when, by the wall in the outside of the heavy section on the top of described sidewall with described draw thin processing after its
The wall in the outside at its sidewall position is smooth turns to same plane.
8. the manufacture method of on-vehicle battery square-shaped battery casing according to claim 6, wherein,
Described draw thin processing when, by the wall in the outside of the heavy section on the top of described sidewall with described draw thin processing after its
The wall in the outside at its sidewall position is smooth turns to same plane.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
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| JP2014-190279 | 2014-09-18 | ||
| JP2014190279 | 2014-09-18 | ||
| JP2015064638A JP6030178B2 (en) | 2014-09-18 | 2015-03-26 | Rectangular battery case for in-vehicle battery and manufacturing method thereof |
| JP2015-064638 | 2015-03-26 | ||
| PCT/JP2015/074375 WO2016043017A1 (en) | 2014-09-18 | 2015-08-28 | Quadrangular cell case for vehicle cell and method for manufacturing same |
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| CN106463655A true CN106463655A (en) | 2017-02-22 |
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|---|---|---|---|
| CN201580027384.9A Pending CN106463655A (en) | 2014-09-18 | 2015-08-28 | Quadrangular cell case for vehicle cell and method for manufacturing same |
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| Country | Link |
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| JP (1) | JP6030178B2 (en) |
| KR (1) | KR101902132B1 (en) |
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| WO2023221104A1 (en) * | 2022-05-20 | 2023-11-23 | 宁德时代新能源科技股份有限公司 | Housing, battery cell, battery, and electric device |
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| KR102256130B1 (en) * | 2017-12-26 | 2021-05-25 | 주식회사 엘지에너지솔루션 | Jig for production of cylinderical type cell and system for manufacturing the cylinderical type cell comprising the same, and method for manufacturing the cylinderical type cell |
| CN108198978A (en) * | 2018-01-02 | 2018-06-22 | 苏州盱酋汽车科技有限公司 | A kind of baffle general battery case |
| US11431046B2 (en) | 2018-08-21 | 2022-08-30 | Nio Technology (Anhui) Co., Ltd. | Lithium-ion cell using aluminum can |
| CN113611963B (en) * | 2021-06-24 | 2022-05-13 | 比亚迪股份有限公司 | Preparation method of battery shell, battery and electronic device |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6030178B2 (en) | 2016-11-24 |
| JP2016066583A (en) | 2016-04-28 |
| KR20170028422A (en) | 2017-03-13 |
| KR101902132B1 (en) | 2018-09-27 |
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