CN108832054A - A kind of Varying-thickness cellular car battery pack shell structure - Google Patents
A kind of Varying-thickness cellular car battery pack shell structure Download PDFInfo
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- CN108832054A CN108832054A CN201810880524.2A CN201810880524A CN108832054A CN 108832054 A CN108832054 A CN 108832054A CN 201810880524 A CN201810880524 A CN 201810880524A CN 108832054 A CN108832054 A CN 108832054A
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- honeycomb
- thickness
- rear end
- end cap
- battery pack
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- 230000001413 cellular effect Effects 0.000 title claims abstract description 9
- 238000010276 construction Methods 0.000 claims description 11
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 239000011229 interlayer Substances 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 230000036244 malformation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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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
- H01M2200/00—Safety devices for primary or secondary 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
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention discloses a kind of Varying-thickness cellular car battery pack shell structure, and the battery pack shell structure is made of housing sidewall, rear end cap and drive end bearing bracket.Side wall and rear end cap are the sandwich structure of honeycomb filling, and drive end bearing bracket is thin-slab structure.The thickness of honeycomb wall of rear end cap axially successively increases (from the tailstock to headstock direction) along honeycomb from back to front, and the thickness of remaining each thin-walled plate remains unchanged.The side wall of shell and rear end cap by being designed to that the sandwich structure of honeycomb filling absorbs collision energy so that electric motor coach is when knocking into the back significantly by the present invention；Thickness design by introducing thickness of honeycomb wall realizes the rear weak preceding strong of rear end cap, the successively progress that can make malformation stablizes its energy-absorbing, reduces collision peak accelerator, it reduces to invade battery pack and damage, while the quality of shell can be significantly reduced compared to equal thickness design.
Description
Technical field
The invention belongs to auto parts and components structure-design technique fields, in particular to a kind of battery pack housing.
Background technique
As China's electric motor coach rapidly develops, the light-weight design and safety Design of electric motor coach component are obtained extensively
Concern.And in the design of electric motor coach, the safety of battery and the lightweight of shell are the emphasis of engineer's concern again.Electricity
Pond pack housing is located at the rear portion of vehicle, and when touching by after, the safety of battery receives great challenge, battery pole vulnerable to
Fire is generated to destroying, or even is set off an explosion.Therefore, it is necessary to which it is big to design an intensity and toughness, collision energy ability is absorbed
Strong excellent light weight battery pack housing structure.
When electric motor coach is touched by after, conquassation deformation occurs first for the rear end of battery pack housing, greatly absorbs and touches
Energy is hit, reduces it backward to the energy transmission of battery pack；Its front end intensity is big, is not susceptible to deform, to guarantee rear end cap
Front correspond to safe space required for battery pack.
In the design of prior art battery pack housing, generally it is welded using the sheet stamping member of equal strength, equal thickness,
Such structure cannot be fully absorbed collision energy, reduce the damage of battery, can not realize that the performance of structure different location is poor
It is different, realize light-weight design.Therefore, good for how to design energy-absorbing effect, performance flexible distributed, the electricity of comprehensive performance brilliance
It is very important for pond pack housing structure.
Summary of the invention
The purpose of invention is to overcome deficiency present in existing shell structure, provides a kind of Varying-thickness honeycomb battery pack housing
Structure, the introducing of honeycomb can increase the rigidity of shell, improve and absorb collision energy.
Technical solution provided by the invention is：
A kind of Varying-thickness cellular car battery pack shell structure, side wall, rear end cap and drive end bearing bracket including shell, side wall by
The sandwich honeycomb sandwich construction of outside plate, inner panel and honeycomb core composition, rear end cap are made of inner panel, outer panels and honeycomb core
Sandwich honeycomb sandwich construction, the sandwich honeycomb sandwich construction of rear end cap is not less than the 1/8 of total shell dimension, the three of side wall
The width of Mingzhi's honeycomb sandwich construction accounts for the 1/20-1/10 of shell beam overall, and the thickness of the honeycomb core of rear end cap is from the tailstock to headstock
Direction is axially successively increased along honeycomb, and the honeycomb core wall thickness of body sidewall is axially remained unchanged along honeycomb, honeycomb core wall thickness
Size is equal to the wall thickness of rear end cap honeycomb core front end, and plate Kun is pressed into corrugated sheet, sawtooth angle by corrugation Kun by honeycomb core
120°。
The honeycomb cell element section of the honeycomb interlayer is regular hexagon.
The inside and outside plate of the side wall, the inside and outside panel of rear end cap and drive end bearing bracket are the aluminium alloy sheet of equal thickness.
The substrate of the shell structure uses the aluminum alloy materials of 3 systems.
The inside and outside plate of the side wall and the inside and outside panel of rear end cap and respective honeycomb core use industrial film glue or pricker
Weldering links into an integrated entity.
The beneficial effects of the invention are as follows：
1, battery pack shell structure of the invention introduces honeycomb core sandwich design, and the ratio for giving full play to honeycomb is inhaled
The big advantage of energy, specific stiffness increases simultaneously compared to the collision energy-absorbing characteristic that traditional thin-walled plate structures can significantly increase shell
The rigidity of big shell, protects the safety of battery pack.
2, the rear end cap thickness of honeycomb wall of shell is axially incremented by successively along honeycomb from back to front, i.e., realization intensity it is rear it is weak before
By force, when touching after sending, compared to traditional equal strength shell structure, can guarantee to occur first in the rear end far from battery pack
Conquassation deformation, significantly absorption collision energy, reduce transmitting of the energy to battery pack；Front end rigidity is big, can prevent deformation from invading
Battery pack area, and battery is damaged.
Detailed description of the invention
Fig. 1 battery pack shell structure assembly diagram of the present invention.
Fig. 2 a battery pack housing sidewall schematic cross-section of the present invention.
Fig. 2 b battery pack housing rear end lid schematic cross-section of the present invention.
Fig. 3 honeycomb wall thickness changes schematic diagram.
In figure, 1- rear end cap, 2- drive end bearing bracket, 3- side plank, 4- side wall inner panel, 5- side wall honeycomb core.
Specific embodiment
Feature of present invention and operation reserve are described in further detail by embodiment below in conjunction with attached drawing：
Varying-thickness honeycomb battery pack schematic diagram of housing structure shown in a, Fig. 2 b as shown in Figure 1, Figure 2, side wall, rear end including shell
Lid 1 and drive end bearing bracket 2, rear end cap and side wall are the sandwich structures of honeycomb interlayer filling, by inner panel 3, outside plate 4 and honeycomb core 5
Composition.Drive end bearing bracket is then common sheet member.
The sandwich honeycomb sandwich construction of rear end cap is the main energy-absorbing area of collision, to guarantee enough energy absorption characteristics, this
Part-structure is not less than the 1/8 of total shell dimension.Load suffered by the honeycomb sandwich construction of side wall is smaller, is not impact force
It directly contacts out, therefore the width of side wall accounts for the 1/20-1/10 of shell beam overall, side wall may be configured as two layers together of honeycomb interlayer
Structure, specific cross sectional shape is as shown in Fig. 2 a, Fig. 2 b.
Due to the introducing of honeycomb sandwich construction, inside and outside plate, drive end bearing bracket and the inside and outside plate of rear end cap of side wall
It is not main energy absorbing component, primarily serves the effect of connection honeycomb cell element, the thickness of each plate can be reduced to conventional housings thickness
The 1/10 of degree, i.e., in 0.15mm-0.2mm.
Selection for honeycomb core wall thickness is the emphasis of this housing design.Due to when electric motor coach is touched by after, after
End cap is first subjected to the effect of impact force, is subsequently communicated to side wall up to the conquassation of shell.Therefore, it can be produced for guarantee rear end cap
Raw enough deformations should also reduce the conquassation of side wall and rear end cap front end to absorb collision energy, to prevent deformation from invading
Enter battery pack area, and battery is damaged.Based on this thought, the thickness (t of the rear end of rear end capmin) answer it is as small as possible, and it is preceding
Thickness (the t at endmax) as big as possible.It can be assumed that thickness is axial in rear end cap and side along honeycomb according to the characteristics of this deformation
The piecewise function (first implementation special case of the invention) of increment type power-exponent function and normal function is obeyed in the distribution of wall：
In formula, x is with a distance from the postoperculum of rear end, and m is gradient index, controls the important parameter of thickness change, L0After being
End cap total length, L are the total lengths of shell.The variation schematic diagram of specific honeycomb core wall thickness is as shown in Figure 3.
When -1<m<When 0, the thickness distribution curve of f (x) is at convex, i.e., with the increase of x, thickness, which is increased speed, to slow down, such as
Shown in curve 3 in Fig. 3；When 0<m<When 1, thickness distribution curve is in a concave shape, i.e., with the increase of x, thickness, which is increased speed, to become faster,
As shown in the curve 1 in Fig. 3, as m=0, thickness distribution curve is in line, as shown in the curve 2 in Fig. 3.Design parameter tmin,
tmaxAnd the value of m should be calculated and be analyzed to be determined according to practical structures size.
The thickness of honeycomb wall g (x) of side wall is according to tmaxTo determine, that is to say, that the honeycomb core wall thickness of housing sidewall is along honeycomb
Axially retain constant, the size of honeycomb core wall thickness is equal to the wall thickness of rear end cap honeycomb core front end.
According to weak deformation characteristics before strong after above-mentioned, and it can be assumed that thickness is axial in rear end cap and side wall along honeycomb
The piecewise function (second implementation special case of the invention) of normal function is obeyed in distribution：
In formula, xnWith L0It is equal, it is merely meant that form it is different.
The honeycomb core structures that thicken in the implementation case can be understood as the n segmentation Varying-thickness structure containing different-thickness, after
End cap has n sections of thickness values to successively increase from back to front, and n-th section of thickness is equal with the thickness value of side wall honeycomb core.
Above-described inner and outer plates and honeycomb core are all made of the aluminium alloy of 3 systems, mainly consider performance after its its soldering
It is good.
Plate Kun is pressed into corrugated sheet by corrugation Kun first by the preparation for honeycomb core, and sawtooth angle is 120 °, rear root
It is using 302 industrial glues or soldering that its is cementing or be welded into honeycomb cell element section and be positive six sides according to the requirement of required structural strength
The honeycomb core of shape.Meanwhile by technological means such as computer programmings, to control the distance between Kun press two-wheeled, to realize
The thickness of honeycomb core plate obeys ladder pattern distribution or continuous function distribution.Honeycomb core after final preparation is used into pricker with inner and outer plates
Weldering links into an integrated entity, to form the sandwich structure of honeycomb interlayer.
Claims (5)
1. a kind of Varying-thickness cellular car battery pack shell structure, which is characterized in that side wall, rear end cap and front end including shell
Lid, the sandwich honeycomb sandwich construction that side wall is made of outside plate, inner panel and honeycomb core, rear end cap be by inner panel, outer panels and
The sandwich honeycomb sandwich construction of honeycomb core composition, the sandwich honeycomb sandwich construction of rear end cap are not less than the 1/ of total shell dimension
8, the width of the sandwich honeycomb sandwich construction of side wall accounts for the 1/20-1/10 of shell beam overall, the thickness of the honeycomb core of rear end cap from
The tailstock is axially successively increased to headstock direction along honeycomb, and the honeycomb core wall thickness of side wall is axially remained unchanged along honeycomb, honeycomb
The size of core wall thickness is equal to the wall thickness of rear end cap honeycomb core front end, and plate Kun is pressed into corrugated sheet by corrugation Kun by honeycomb core,
Sawtooth angle is 120 °.
2. a kind of Varying-thickness cellular car battery pack shell structure according to claim 1, which is characterized in that the bee
The honeycomb cell element section of nest interlayer is regular hexagon.
3. a kind of Varying-thickness cellular car battery pack shell structure according to claim 1, which is characterized in that the side wall
Inside and outside plate, rear end cap inside and outside panel and drive end bearing bracket be equal thickness aluminium alloy sheet.
4. a kind of Varying-thickness cellular car battery pack shell structure according to claim 1, which is characterized in that the shell
The substrate of structure uses the aluminum alloy materials of 3 systems.
5. a kind of Varying-thickness cellular car battery pack shell structure according to claim 1, which is characterized in that the side wall
Inside and outside plate and rear end cap inside and outside panel and respective honeycomb core using industrial film glue or soldering connection it is integral.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810880524.2A CN108832054A (en) | 2018-08-04 | 2018-08-04 | A kind of Varying-thickness cellular car battery pack shell structure |
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| CN201810880524.2A CN108832054A (en) | 2018-08-04 | 2018-08-04 | A kind of Varying-thickness cellular car battery pack shell structure |
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| CN108832054A true CN108832054A (en) | 2018-11-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742277A (en) * | 2018-12-14 | 2019-05-10 | 华侨大学 | A kind of reinforced high efficient protected battery case |
| CN110391373A (en) * | 2019-07-15 | 2019-10-29 | 华侨大学 | A kind of novel energy-absorbing protection battery case |
| CN114175374A (en) * | 2019-07-15 | 2022-03-11 | 穆尔和本德公司 | Housing device for accommodating an electrical storage device |
| CN114976398A (en) * | 2022-06-12 | 2022-08-30 | 昆明理工大学 | Battery shell made of partitioned gradient composite material and preparation method thereof |
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| CN208385509U (en) * | 2018-08-04 | 2019-01-15 | 丹阳科美汽车部件有限公司 | A kind of Varying-thickness cellular car battery pack shell structure |
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2018
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Patent Citations (6)
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| US20160167544A1 (en) * | 2014-12-11 | 2016-06-16 | Ford Global Technologies, Llc | Battery impact absorbing system |
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| CN105398099A (en) * | 2015-10-26 | 2016-03-16 | 湖南大学 | Gradient honeycomb complex, and preparation method and application structure thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742277A (en) * | 2018-12-14 | 2019-05-10 | 华侨大学 | A kind of reinforced high efficient protected battery case |
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| CN110391373A (en) * | 2019-07-15 | 2019-10-29 | 华侨大学 | A kind of novel energy-absorbing protection battery case |
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| CN114976398A (en) * | 2022-06-12 | 2022-08-30 | 昆明理工大学 | Battery shell made of partitioned gradient composite material and preparation method thereof |
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