CN106926515A - A kind of composite battery dividing plate and preparation method thereof - Google Patents
A kind of composite battery dividing plate and preparation method thereof Download PDFInfo
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- CN106926515A CN106926515A CN201710070326.5A CN201710070326A CN106926515A CN 106926515 A CN106926515 A CN 106926515A CN 201710070326 A CN201710070326 A CN 201710070326A CN 106926515 A CN106926515 A CN 106926515A
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- dividing plate
- hdpe
- polypropylene
- high density
- density polyethylene
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- 239000002131 composite material Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 69
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 63
- 239000004743 Polypropylene Substances 0.000 claims abstract description 33
- 229920001155 polypropylene Polymers 0.000 claims abstract description 33
- -1 polypropylene Polymers 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 239000008358 core component Substances 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 16
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 239000011241 protective layer Substances 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 5
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical group [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 229920005992 thermoplastic resin Polymers 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 239000012766 organic filler Substances 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 3
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 3
- 239000011256 inorganic filler Substances 0.000 claims description 3
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- 239000003063 flame retardant Substances 0.000 claims description 2
- 239000002736 nonionic surfactant Substances 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 claims description 2
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 3
- 230000032683 aging Effects 0.000 abstract description 2
- 230000003321 amplification Effects 0.000 abstract description 2
- 230000008602 contraction Effects 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 239000008151 electrolyte solution Substances 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000012212 insulator Substances 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 description 27
- 238000013517 stratification Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 9
- 230000009467 reduction Effects 0.000 description 9
- 230000006866 deterioration Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000003026 anti-oxygenic effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000010294 electrolyte impregnation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
- B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/04—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the partial melting of at least one layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/546—Flexural strength; Flexion stiffness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/552—Fatigue strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/10—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)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Cell Separators (AREA)
Abstract
The present invention discloses a kind of composite battery dividing plate and preparation method thereof.It is the porous composite bed of the core-sheath-type of sheath composition that battery separator of the present invention is included with polypropylene as core component, with high density polyethylene (HDPE), it is characterised in that：The porous composite bed is 100/cm by opening up 0.3~0.8 μm of aperture, aperture density on polypropylene2And constituted by opening up 1.0~5.0 μm of apertures on high density polyethylene (HDPE), aperture density is 100/cm2, it is to form trilaminate structure in the way of covering a layer polypropylene from two sides with two hdpe layers on the thickness direction of dividing plate, the parts by weight of the high density polyethylene (HDPE) account for the 60%~80% of porous composite bed parts by weight.Separator material of the invention is in itself insulator, and loose and porous structure can inhale the electrolyte solution of amplification quantity；Chemical stability is good, sulfuric acid corrosion resistant, resistance to oxidation and aging；With larger mechanical strength and elasticity, temperature in use scope is wide；Satisfactory contraction or expansion rate；The thickness evenness of dividing plate meets index request.
Description
Technical field
The present invention relates to cell art, specifically a kind of composite battery dividing plate and preparation method thereof.
Background technology
A kind of superfine fibre dividing plate for lead-acid accumulator that superfine glass fibre partition board is made of Pyrex.By
In aperture is small, porosity big, a large amount of electrolyte can be absorbed, be commonly used for valve-regulated sealed lead-acid batteries, the dividing plate of poor liquid storage battery.
It is primary raw material that the product uses the pure mineral wool of import, is obtained with the advanced moulding process of high-tech.It has improves battery
Capacity, fast ion exchange diffusion, efficiency high, cold starting performance stabilization and promotion active material make full use of, prevent anode
The advantages of active material comes off, so as to effectively extend 2-4 times of the service life of battery.
In described existing main flow is without stacking or the individual layer of composite construction and the dividing plate of single composition, in institute
In the two life deterioration reasons (oppressive force reduction and electrolyte into stratification) stated, although propose improvement each life deterioration original
The technology of cause, but, do not propose to improve simultaneously so far described two life deterioration reasons (oppressive force reduction and electrolyte into
Stratification) technology.Existing main flow without stacking or the individual layer of composite construction and the dividing plate of single composition in, although as
For the idea of the movement of the electrolyte in the battery for improving high rate discharging characteristic, it is proposed that in the interface of improvement pole plate and dividing plate
Electrolyte movement technology, but, do not propose so far improve diaphragm internal electrolyte movement technology.Think this
Reason is because for without stacking or the individual layer of composite construction and the dividing plate of single composition, diaphragm internal has uniform
Pore structure, therefore, it is difficult to control electrolyte in the movement of diaphragm internal.
At present, the Lifetime Damage Model of lead accumulator, primarily points out two reasons：After electrolyte impregnation in pole plate group
(block board thickness is reduced to main cause for the reduction of oppressive force.Hereinafter referred to as " oppressive force reduction ") and electrolyte into stratification
(produce the phenomenon of the difference in specific gravity of electrolyte up and down in battery due to repeating discharge and recharge.Hereinafter referred to as " electrolyte into stratification " or
Person's " into stratification ").Therefore in order to the battery life that is further enhanced is, it is necessary to while improve two described life deterioration reasons
(oppressive force reduction and electrolyte into stratification).In order to improve described two life deterioration reasons (oppressive force reduction and electrolyte
Into stratification) and the improvement item of dividing plate that carries out shows opposite movement, therefore, in the list without stacking or composite construction
Make the opposite movement and deposit to be highly difficult on the dividing plate of layer and single composition.
The content of the invention
It is an object of the invention to propose a kind of composite battery dividing plate, the hole of existing lead accumulator dividing plate is mainly solved
Footpath is too big, causes the deposits in electrolyte in hole, it is easy to cause the problem of short circuit.
To achieve these goals, a kind of composite battery dividing plate of the present invention, the battery separator is included with poly- third
Alkene is core component, is the porous composite bed of the core-sheath-type of sheath composition with high density polyethylene (HDPE), and the porous composite bed is by polypropylene
0.3~0.8 μm of aperture is opened up, aperture density is 100/cm2And by opening up 1.0~5.0 μm of aperture structures on high density polyethylene (HDPE)
Into aperture density is 100/cm2, it is to cover one layer from two sides with two hdpe layers on the thickness direction of dividing plate
Polyacrylic mode forms trilaminate structure；The melting peak area of high density polyethylene (HDPE) and polyacrylic melting peak area ratio
It is 1.00~2.50, the parts by weight of the high density polyethylene (HDPE) account for the 60%~80% of porous composite bed parts by weight.
The polypropylene, high density polyethylene (HDPE) covering surface have insulating protective layer.
The insulating protective layer is titanium nitride.
The polypropylene, high density polyethylene (HDPE) composition carry out heat fused or hot pressing fusion.
The polypropylene, high density polyethylene (HDPE) are thermoplastic resins.
The Kong Zhonghan organic fillers or inorganic filler of the porous composite bed.
Contain additive in the hole of the porous composite bed, additive is aliphatic ester, low-molecular-weight polyolefin, stabilization
The stretching auxiliary agent that agent, antioxidant, ultra-violet absorber, fire retardant or nonionic surfactant are made.
Electrolyte stratification turn to from the hyperbaric sulfuric acid of pole plate discharge it is main in dividing plate by and move downwards and
The phenomenon for causing, therefore, as long as be conceived to not making the sulfuric acid from pole plate discharge be moved downwards in the carrier ring connected with pole plate
Move and improved in the way of keeping as much as possible, it is possible to bring the effect for preventing electrolyte into stratification.Especially as
The technical essential for preventing the electrolyte into the effect of stratification is brought, is conceived to and how to be improved in dividing plate holostrome particularly and pad-face
The electrolyte retention of the baffle surface layer segment for connecting is main points.
The effect of oppressive force reduction is prevented to bring, polypropylene, the aperture raising repulsion of high density polyethylene (HDPE) more have
Effect, therefore, clapboard aperture is improved, being brought simultaneously prevents the effect of oppressive force reduction and prevents effect of the electrolyte into stratification
Dividing plate thought, find with about 1 μm of the glass fibre avarage fiber diameter of existing main flow, the individual layer that about 3.7 μm of average pore size
And on the basis of the dividing plate of single composition, the glass fibre avarage fiber diameter in holostrome is set higher than 1 μm, therefore ensure that anti-
The only effect of oppressive force reduction, in the above-mentioned prior art on the basis of this, in order to bring the effect for preventing electrolyte into stratification, this
Invention separator material replaces with polypropylene, high density polyethylene (HDPE), and in block board thickness direction setting aperture, partly improves electrolysis
Liquid holding capacity.
In addition, in order to improve short time heavy-current discharge performance i.e. high rate discharging characteristic, main points for how will remain in every
Electrolyte in plate is rapidly supplied to pole plate side, at present, it is proposed that promote the shifting of the electrolyte in the interface of pole plate and dividing plate
Dynamic idea, controls it to move, and promotes the electrolyte mobility of the thickness direction of dividing plate, thus, electricity during high rate discharging
Solution liquid supply capacity is improved, and further increases the charge-discharge characteristic of battery.
A kind of preparation method of compound dividing plate of the present invention, its advantage is：Separator material is in itself insulation
Body, loose and porous structure can inhale the electrolyte solution of amplification quantity；Chemical stability is good, sulfuric acid corrosion resistant, resistance to oxidation and aging；
With larger mechanical strength and elasticity, it is easy to production to install；With preferable wetability, easily it is impregnated with by electrolyte sulfuric acid；It is right
Battery is harmless；The resistance that dividing plate is immersed in electrolyte sulfuric acid solution is small；Temperature in use scope is wide；Aperture uniformity on dividing plate
It is high；Satisfactory contraction or expansion rate；Folding resistance is good；The thickness evenness of dividing plate meets index request according to the present invention,
By having both the function of fixator and dividing plate, battery life can be effectively improved, improve with the effect for preventing electrolyte into stratification,
Further increase the life-span of battery.In addition, promoting the electrolyte mobility of the thickness direction of dividing plate, thus, high rate is put
Electrolyte supply ability when electric is improved, and further increases the charge-discharge characteristic of battery.
Specific embodiment
Embodiment 1
A kind of composite battery dividing plate of the present invention, the battery separator includes gathering with polypropylene as core component, with high density
Ethene is the porous composite bed of core-sheath-type of sheath composition, and the porous composite bed is by opening up 0.8 μm of aperture, aperture density on polypropylene
It is 100/cm2And constituted by opening up 5.0 μm of apertures on high density polyethylene (HDPE), aperture density is 100/cm2, it is in dividing plate
On thickness direction trilaminate structure is formed in the way of covering a layer polypropylene from two sides with two hdpe layers；It is highly dense
The melting peak area and polyacrylic melting peak area ratio for spending polyethylene are 2.50, the weight portion of the high density polyethylene (HDPE)
Number accounts for the 60% of porous composite bed parts by weight；Polypropylene, high density polyethylene (HDPE) covering surface have insulating protective layer；Insulation protection
Layer is titanium nitride；Polypropylene, high density polyethylene (HDPE) composition carry out heat fused；Polypropylene, high density polyethylene (HDPE) are thermoplastic resins；
The Kong Zhonghan organic fillers of porous composite bed；Contain antioxidant in the hole of porous composite bed.
Embodiment 2
A kind of composite battery dividing plate of the present invention, the battery separator includes gathering with polypropylene as core component, with high density
Ethene is the porous composite bed of core-sheath-type of sheath composition, and the porous composite bed is by opening up 0.3 μm of aperture, aperture density on polypropylene
It is 100/cm2And constituted by opening up 1.0 μm of apertures on high density polyethylene (HDPE), aperture density is 100/cm2, it is in dividing plate
On thickness direction trilaminate structure is formed in the way of covering a layer polypropylene from two sides with two hdpe layers；It is highly dense
The melting peak area and polyacrylic melting peak area ratio for spending polyethylene are 1, and the parts by weight of the high density polyethylene (HDPE) are accounted for
The 80% of porous composite bed parts by weight；Polypropylene, high density polyethylene (HDPE) covering surface have insulating protective layer；Insulating protective layer is
Titanium nitride；Polypropylene, high density polyethylene (HDPE) composition carry out hot pressing fusion；Polypropylene, high density polyethylene (HDPE) are thermoplastic resins；It is many
The Kong Zhonghan organic fillers of hole composite bed；Contain low-molecular-weight polyolefin in the hole of porous composite bed.
Embodiment 3
A kind of composite battery dividing plate of the present invention, the battery separator includes gathering with polypropylene as core component, with high density
Ethene is the porous composite bed of core-sheath-type of sheath composition, and the porous composite bed is by opening up 0.5 μm of aperture, aperture density on polypropylene
It is 100/cm2And constituted by opening up 3.0 μm of apertures on high density polyethylene (HDPE), aperture density is 100/cm2, it is in dividing plate
On thickness direction trilaminate structure is formed in the way of covering a layer polypropylene from two sides with two hdpe layers；It is highly dense
The melting peak area and polyacrylic melting peak area ratio for spending polyethylene are 1.50, the parts by weight of the high density polyethylene (HDPE)
Account for the 70% of porous composite bed parts by weight；Polypropylene, high density polyethylene (HDPE) covering surface have insulating protective layer；Insulating protective layer
It is titanium nitride；Polypropylene, high density polyethylene (HDPE) composition carry out heat fused；Polypropylene, high density polyethylene (HDPE) are thermoplastic resins；It is many
The Kong Zhonghan inorganic fillers of hole composite bed；Contain stabilizer in the hole of porous composite bed.
The compound dividing plate physicochemical property of table 1
As shown in Table 1, this product meets all characteristic index of JB/T7630-1998 regulations, and product has that resistance is low, largest hole
The characteristics of footpath is small, antioxygenic property is good.
Claims (7)
1. a kind of composite battery dividing plate, it is characterised in that：The battery separator is included with polypropylene as core component, with high density
Polyethylene is the porous composite bed of core-sheath-type of sheath composition, it is characterised in that：The porous composite bed by opening up 0.3 on polypropylene~
0.8 μm of aperture, aperture density is 100/cm2And constituted by opening up 1.0~5.0 μm of apertures on high density polyethylene (HDPE), aperture is close
It is 100/cm to spend2, it is to cover a layer polypropylene from two sides with two hdpe layers on the thickness direction of dividing plate
Mode forms trilaminate structure；The melting peak area of high density polyethylene (HDPE) is 1.00 with polyacrylic melting peak area ratio
~2.50, the parts by weight of the high density polyethylene (HDPE) account for the 60%~80% of porous composite bed parts by weight.
2. as claimed in claim 1 a kind of composite battery dividing plate, it is characterised in that：The polypropylene, high density polyethylene (HDPE) table
Face is coated with insulating protective layer.
3. as claimed in claim 2 a kind of preparation method of composite battery dividing plate, it is characterised in that：The insulating protective layer is
Titanium nitride.
4. as claimed in claim 2 a kind of preparation method of composite battery dividing plate, it is characterised in that：It is the polypropylene, highly dense
Degree polyethylene carries out heat fused or hot pressing fusion.
5. as claimed in claim 4 a kind of preparation method of composite battery dividing plate, it is characterised in that：It is the polypropylene, highly dense
Degree polyethylene is thermoplastic resin.
6. as claimed in claim 1 a kind of preparation method of composite battery dividing plate, it is characterised in that：The porous composite bed
Kong Zhonghan organic fillers or inorganic filler.
7. as claimed in claim 6 a kind of preparation method of composite battery dividing plate, it is characterised in that：The porous composite bed
Contain additive in hole, additive be aliphatic ester, low-molecular-weight polyolefin, stabilizer, antioxidant, ultra-violet absorber,
The stretching auxiliary agent that fire retardant or nonionic surfactant are made.
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| CN201710070326.5A CN106926515A (en) | 2017-02-09 | 2017-02-09 | A kind of composite battery dividing plate and preparation method thereof |
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| CN201710070326.5A CN106926515A (en) | 2017-02-09 | 2017-02-09 | A kind of composite battery dividing plate and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6666969B1 (en) * | 1998-10-01 | 2003-12-23 | Tonen Chemical Corporation | Microporous polyolefin film and process for producing the same |
| CN101296795A (en) * | 2005-10-24 | 2008-10-29 | 东燃化学株式会社 | Polyolefin multilayer microporous film, method for producing same and battery separator |
| CN101511589A (en) * | 2006-08-31 | 2009-08-19 | 东燃化学株式会社 | Microporous membrane, battery separator and battery |
-
2017
- 2017-02-09 CN CN201710070326.5A patent/CN106926515A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6666969B1 (en) * | 1998-10-01 | 2003-12-23 | Tonen Chemical Corporation | Microporous polyolefin film and process for producing the same |
| CN101296795A (en) * | 2005-10-24 | 2008-10-29 | 东燃化学株式会社 | Polyolefin multilayer microporous film, method for producing same and battery separator |
| CN101511589A (en) * | 2006-08-31 | 2009-08-19 | 东燃化学株式会社 | Microporous membrane, battery separator and battery |
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