CN110492035A - A kind of lower box and its preparation method of power battery - Google Patents
A kind of lower box and its preparation method of power battery Download PDFInfo
- Publication number
- CN110492035A CN110492035A CN201910772533.4A CN201910772533A CN110492035A CN 110492035 A CN110492035 A CN 110492035A CN 201910772533 A CN201910772533 A CN 201910772533A CN 110492035 A CN110492035 A CN 110492035A
- Authority
- CN
- China
- Prior art keywords
- lower box
- metal framework
- power battery
- siding
- fibre plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/006—Producing casings, e.g. accumulator cases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
-
- 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
-
- 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
Abstract
Present invention discloses a kind of lower box of power battery and its preparation methods, open-top receptacle for the composite material integral formed coated entirely by metal framework and its outside, wherein metal framework is that the breadth of rod piece assembly and metal framework with hollowed out area covers entire lower box, composite material is that one layer or more fibre plate stacks and infiltrate in resin the siding of curing molding, and the thermal coefficient of siding is less than 1W/m.K.Its preparation method is that composite material is embedded in front and back in metal framework to be laid with by several times, then pours into resin and solidifies integral.Using the lower box and its preparation method of structure of the invention optimization in power battery, the lower box uses polymer composite and metal molding joined integrally, relatively merely using lower box made from composite material or metal material while weight saving 20%, so that intensity meets the requirement of GB/T31467.3, and it learns after tested, one times of holding time or more of the lower box than pure metal cabinet under same use condition.
Description
Technical field
The present invention relates to one kind to design for new-energy automobile power battery structure, more particularly to a kind of with light weight
It is full of, keeps the temperature and lower box and its manufacturing method that structural strength is high.
Background technique
As government agitates new-energy automobile in fiscal stickers and constantly adjusts, is increasingly promoted towards energy density, is continuous
The mileage that navigates is promoted, the direction of hundred kilometers of power consumption declines guides.These all propose the lightweight of vehicle and battery pack higher
Requirement.
Battery pack is new-energy automobile core energy source, provides driving electric energy for vehicle.Conventional batteries packet mainly passes through gold
The cabinet envelope for belonging to material constitutes battery pack main body.Battery pack includes battery core, mould group, electrical system, heat management system, battery case
Body and BMS etc..Main member inside battery case is battery pack, shadow of the efficiency for charge-discharge vulnerable to the temperature inside the box stability
It rings, when environment temperature maintains 20 DEG C or so, the efficiency for charge-discharge of battery and service life are optimal, but traditional battery case
For material generally based on the metals such as aluminium, steel, heat insulation effect is excessively poor, in order to maintain battery case internal temperature then need to be in box house
For installation heat management system to control internal thermal field, such heat preserving mode leads to the significant losses of battery pack energy, vehicle continuation of the journey
Time and course continuation mileage can decline.
Current new-energy automobile because the safety accident of faults itself takes place frequently, the safety of new energy car battery packet, the service life and
Charge-discharge performance has crucial influence.In order to improve the efficiency of refrigeration and heating, battery pack and external environment are cut off
Switching path, needs to design complete heat-insulation system for battery pack, and the heat preservation of current battery packet mainly uses polystyrene, heat insulation foam
With aerogel blanket etc.；Composite material is used for the light-weight design of battery case by part manufacturing firm, but does not also keep the temperature battery case
Scope is accounted for, and the structural strength of cabinet is unable to get guarantee.
Summary of the invention
The purpose of the present invention is directed to the lower box and its preparation method of a kind of power battery, and solution takes into account battery case light weight
The problem of change, heat preservation and high-mechanic intensity.
The present invention realizes that the technical solution of said one purpose is that a kind of lower box of power battery, feature exists
In for the open-top receptacle of the composite material integral formed coated entirely by metal framework and its outside, wherein the metal framework is tool
There is the breadth of the rod piece assembly of hollowed out area and metal framework to cover entire lower box, the composite material is one layer or more fine
The siding that piece stacks and infiltrates curing molding in resin is tieed up, the thermal coefficient of the siding is less than 1W/m.K.
Further, the metal framework is integrated casting and forming or integral by three or more rigid rod welding, bolts
Truss.
Further, the metal framework is shaped to the plane girder of bottom surface in corresponding lower box siding.
Further, the metal framework is shaped to bottom surface and side wall in corresponding lower box siding and crosses the solid of quadrangle
Truss.
Further, the outline border of the metal framework is end to end solid square bar, and is equipped in outline border and hands in length and breadth
The hollow square tube beam of misphase even.
Further, the siding in the thickness of metal framework hollowed out area between 3mm-5mm, and cladding metal framework
The thickness on surface layer is between 2mm-3mm.
Further, the fibre plate is glass fibre, the fiber cloth of basalt fibre or carbon fiber, fibrofelt；Two layers
The above fibre plate of the same race stacks or the stacking of the fibre plate interval of xenogenesis.
The present invention realizes that the technical solution of another above-mentioned purpose is, a kind of preparation method of power battery lower box,
Be characterized in that comprising steps of
S1 presses body structure expanded view and cuts fibre plate；
S2, in corresponding lower box surface of internal cavity shape, prefabricated die surface is successively laid with fibre plate, forms the first multiple material layer；
Prefabricated profiled metal framework is aligned in the default slot of press-in die and gland is on the first multiple material layer by S3；
S4 is laid with fibre plate in the first multiple material layer and metal framework surface layer-by-layer, forms the second multiple material layer；
S5 is transferred to vacuum environment, and pours into resin into mold after being closed mold；
The mold of full resin is transferred to curing oven from vacuum environment and temperature control curing molding is Battery case by S6.
Further, further include S7 after S6, open up assembly hole, electrical member respectively in the predefined position of molding Battery case
Part mounting hole and threading hole.
Using the lower box and its preparation method of structure of the invention optimization, have substantive distinguishing features outstanding and significant progress
Property: the lower box uses polymer composite and metal molding joined integrally, uses composite material or metal material merely relatively
Expect that lower box obtained while weight saving 20%, so that intensity meets the requirement of GB/T31467.3, and obtains after tested
Know, one times of holding time or more of the lower box than pure metal cabinet under same use condition.
Detailed description of the invention
Fig. 1 is the schematic perspective view of power battery lower box assembly battery pack of the present invention.
Fig. 2 is the inverted layered structure schematic diagram of lower box shown in Fig. 1.
Fig. 3 is the partial sectional view of lower box shown in Fig. 2.
Fig. 4 is the preparation process flow chart of power battery lower box of the present invention.
Specific embodiment
Just attached drawing in conjunction with the embodiments below, the embodiment of the present invention is described in further detail, so that of the invention
Technical solution is more readily understood, grasps, to make relatively sharp define to protection scope of the present invention.
Designer of the present invention constantly accumulates experience during long campaigns automobile batteries is manufactured, and analyzes and has studied
Many deficiencies of existing new energy car battery, to meet current power battery request high structural strength, lightweight and perfect
The finished product of thermal insulation property sets about researching and developing and innovating proposing the lower box and its preparation method of a kind of power battery, is new-energy automobile
Sound development established on the one hand basis.
Firstly, schematic perspective view as shown in Figure 1 to Figure 3, layered structure schematic diagram and partial sectional view were as it can be seen that should
The structural improvement feature of power battery lower box: the lower box is the composite material 1 one coated entirely by metal framework 2 and its outside
Body formed open-top receptacle, battery pack 3 is loaded on wherein positioning and fixes when Product Assembly.Therefore it is used as the body formed basis of the nowel
Mold by after the battery pack global alignment of rated capacity monnolithic case and specification customize.It is different from tradition, it should
Lower box is not that simple metals material punching press casting and forming or simple composite material are made, but the two are organically combined, metal
Frame from-inner-to-outer provide the entire breadth of lower box to support strength, and to provide nowel intracoelomic cavity relatively extraneous for composite material
Heat insulating ability.
Wherein metal framework 2 is that the breadth of rod piece assembly and metal framework with hollowed out area covers entire nowel
Body.So-called rod piece assembly from the point of view of specific, the metal framework are integrated casting and forming or by three or more rigid rod welding, bolts
Integral truss.Matrix pattern metal frame embodiment as depicted in figs. 1 and 2, for bottom surface in corresponding lower box siding
Plane girder.I.e. generally plane to solid framework, its as shown in Figure 3 outline border is end to end solid square bar 21, and outer
Hollow square tube beam 22 connected in a crisscross manner is equipped in frame.Solid square bar is intended to keep the structure of metal framework and lower box entirety
Intensity, the metal straight rod being for example segmented connect the frame of composition, then the techniques such as preferred weld or bolt make its keep globality；Such as
It is for the molding frame of single rigid bar, then preferred to squeeze out the welding of bending closed loop or the directly techniques such as slab punch forming.In outline border
The overall weight of metal framework is further mitigated under the premise of ensureing rigid in plane using hollow square tube beam, from
And optimize the final product quality of lower box.And each vacancy section of sectioned is then formed between those hollow square tube beams and outline border
Domain.
It can be seen that the lower box is in the integrated molding of metal material and composite material not using whole with lower box
The complete metal plate of form fit, and only increase in the outline border of bearing stress Relatively centralized and to associativity on central axes knot
Structure intensity.Even more impart the integrated molding of the composite material on opposing metallic material medial and lateral surface.
Certainly, metal framework in addition to above preferred embodiment, is also equipped with plurality of optional according to the condition difference that technique manufactures
Embodiment.From the point of view of specific, on the one hand as plane girder, outline border can form closing of being round or oval
Ring, and hollow square tube beam is connected in interlocking in outline border along symmetrical axial direction or short axial.On the other hand the metal framework can also be with
Bottom surface and side wall in corresponding lower box siding is shaped to cross the space truss of quadrangle, on the basis of aforementioned preferred embodiments
The quadrangle vertical welding support rod of outline border, the structure that lower box can be further promoted in this way after composite material connecting shaping are strong
Degree, certain cost are weight increases, therefore depending on the requirement appropriateness choice of the end properties of lower box.
Above-mentioned composite material 1 is that one layer or more fibre plate stacks and infiltrates the siding of curing molding in resin, and siding exists
The thickness of metal framework hollowed out area is coating the thickness on metal framework surface layer between 2mm-3mm between 3mm-5mm.The wall
Furthermore the main function of plate first is that auxiliary carrying, second is that being the thermal coefficient for reducing lower box for water proof and dust proof, have it
Preferable heat insulation effect.The relatively thick effect for biasing toward auxiliary carrying of the thickness of above-mentioned hollowed out area, and coat metal framework
Surface layer thickness it is relatively thin, it is intended to carrying effect shared after optimize lower box gross weight.The thermal coefficient of steel is about
44W/m.K, the thermal coefficient of aluminium alloy are about 209W/m.K, in contrast, the thermally conductive system of the siding after the composite molding
Number is less than 1W/m.K, therefore has thermal insulation property and promoted significantly.
From the point of view of more refining, the fibre plate including but not limited to glass fibre, basalt fibre or carbon fiber sheets fabric,
Raw material appearance forrns can be fiber cloth or fibrofelt.It, can be of the same race using two layers or more in the molding structure of lower box
Fibre plate is stacked to be stacked by nominal thickness, can also reach specified using fibre plate not of the same race, each two layers or more interval stacking
Thickness.Moreover, resin needed for above-mentioned wallboard forming, including but not limited to epoxy resin, phenolic resin, all resin materials are equal
It need to meet for flame-retardant resin.
The present invention proposes the manufacturing process of the lower box on the basis of lower box structural improvement.Firstly the need of
What is completed is that basis before manufacture prepares, including mold accurately machine-shaping, the stock of fibre plate and resin material and
Prepared by the molding of metal framework, all kinds of techniques that wherein manufacture of metal framework can use prior art maturation are made and non-
Apply for the emphasis of protection, is only used as rigid shaping raw material, therefore omit and its manufacturing process is described in detail；And mold corresponds to lower box
Surface of internal cavity shape is prefabricated to be formed.
If the process flow chart of Fig. 4 is as it can be seen that the preparation method describes step by step are as follows: S1, it can be by hand or using automation equipment
It presses body structure expanded view and cuts fibre plate；S2 is successively laid with fibre plate in die surface, forms the first multiple material layer 11；S3,
Prefabricated profiled metal framework 2 is aligned in the default slot of press-in die and gland is on the first multiple material layer 11；S4 is multiple first
Material layer 11 and 1 surface of metal framework continue successively to be laid with fibre plate, form the second multiple material layer 12；S5 is transferred to after being closed mold
Vacuum environment, and resin is poured into mold, vacuum bag can be specifically fixed on mold using sealant, then be vacuumized
And keep certain time；The mold of full resin is transferred to curing oven from vacuum environment and temperature control curing molding is battery case by S6
Body.Then further include S7, in the predefined position of molding Battery case using the automation clamping Battery case of engraving machine, opens respectively
If the threading hole 6 of assembly hole 4, electrical component mounting hole 5 and all kinds of wire rods.To sum up for power battery lower box of the present invention and its
Preparation method with the detailed description of diagram, so that the innovation essence of technical solution of the present invention is shown, and has in conjunction with the embodiments
Break through the plurality of advantages of present battery cabinet: the lower box uses polymer composite and metal molding joined integrally, relatively
Merely using lower box made from composite material or metal material while weight saving 20%, so that intensity meets GB/
The requirement of T31467.3, and learn after tested, the lower box prolongs than the soaking time of pure metal cabinet under same use condition
It is one times long or more.
In addition to the implementation, the present invention can also have other embodiment, all to use equivalent substitution or equivalent transformation shape
At technical solution, be all fallen within scope of the present invention.
Claims (9)
1. a kind of lower box of power battery, it is characterised in that for the composite material one coated entirely by metal framework and its outside
Molding open-top receptacle, wherein the breadth that the metal framework is rod piece assembly and metal framework with hollowed out area covers
Entire lower box, the composite material is that one layer or more fibre plate stacks and infiltrate in resin the siding of curing molding, described
The thermal coefficient of siding is less than 1W/m.K.
2. the lower box of power battery according to claim 1, it is characterised in that: the metal framework is integrated casting and forming
Or it welded by three or more rigid rods, bolt integral truss.
3. the lower box of power battery according to claim 1 or claim 2, it is characterised in that: the metal framework is shaped to correspond to
The plane girder of bottom surface in lower box siding.
4. the lower box of power battery according to claim 1 or claim 2, it is characterised in that: the metal framework is shaped to correspond to
Bottom surface and side wall cross the space truss of quadrangle in lower box siding.
5. the lower box of power battery according to claim 1 or claim 2, it is characterised in that: headed by the outline border of the metal framework
The solid square bar that tail connects, and hollow square tube beam connected in a crisscross manner is equipped in outline border.
6. the lower box of power battery according to claim 1, it is characterised in that: the siding is in metal framework hollowed out area
Thickness between 3mm-5mm, and cladding metal framework surface layer thickness between 2mm-3mm.
7. the lower box of power battery according to claim 1, it is characterised in that: the fibre plate is glass fibre, the Black Warrior
The fiber cloth of rock fiber or carbon fiber, fibrofelt；Two layers or more fibre plate of the same race stacks or the stacking of the fibre plate interval of xenogenesis.
8. a kind of preparation method of power battery lower box, it is characterised in that comprising steps of
S1 presses body structure expanded view and cuts fibre plate；
S2, in corresponding lower box surface of internal cavity shape, prefabricated die surface is successively laid with fibre plate, forms the first multiple material layer；
Prefabricated profiled metal framework is aligned in the default slot of press-in die and gland is on the first multiple material layer by S3；
S4 is laid with fibre plate in the first multiple material layer and metal framework surface layer-by-layer, forms the second multiple material layer；
S5 is transferred to vacuum environment, and pours into resin into mold after being closed mold；
The mold of full resin is transferred to curing oven from vacuum environment and temperature control curing molding is Battery case by S6.
9. the preparation method of power battery lower box according to claim 8, it is characterised in that: further include S7 after S6, molding
The predefined position of Battery case opens up assembly hole, electrical component mounting hole and threading hole respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910772533.4A CN110492035A (en) | 2019-08-21 | 2019-08-21 | A kind of lower box and its preparation method of power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910772533.4A CN110492035A (en) | 2019-08-21 | 2019-08-21 | A kind of lower box and its preparation method of power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110492035A true CN110492035A (en) | 2019-11-22 |
Family
ID=68552606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910772533.4A Pending CN110492035A (en) | 2019-08-21 | 2019-08-21 | A kind of lower box and its preparation method of power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110492035A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839133A (en) * | 2020-06-05 | 2021-12-24 | 奥动新能源汽车科技有限公司 | Battery box |
| US11799148B2 (en) * | 2019-07-23 | 2023-10-24 | Sk On Co., Ltd. | Battery module |
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| WO2017156771A1 (en) * | 2016-03-18 | 2017-09-21 | 宁德时代新能源科技股份有限公司 | Lower box body and battery box including same |
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| CN210349917U (en) * | 2019-08-21 | 2020-04-17 | 中材科技（苏州）有限公司 | Lower box body of power battery |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012183820A (en) * | 2011-02-15 | 2012-09-27 | Toray Ind Inc | Chassis for electronic equipment |
| WO2017156771A1 (en) * | 2016-03-18 | 2017-09-21 | 宁德时代新能源科技股份有限公司 | Lower box body and battery box including same |
| CN206148495U (en) * | 2016-10-20 | 2017-05-03 | 中山大学 | Lightweight, high strength, waterproof seal's battery box |
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| CN109473584A (en) * | 2018-11-19 | 2019-03-15 | 苏州银禧新能源复合材料有限公司 | Battery box cover and its moulding process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11799148B2 (en) * | 2019-07-23 | 2023-10-24 | Sk On Co., Ltd. | Battery module |
| CN113839133A (en) * | 2020-06-05 | 2021-12-24 | 奥动新能源汽车科技有限公司 | Battery box |
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