CN104916848B - The method for improving battery low-temperature startup performance - Google Patents
The method for improving battery low-temperature startup performance Download PDFInfo
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- CN104916848B CN104916848B CN201510223901.1A CN201510223901A CN104916848B CN 104916848 B CN104916848 B CN 104916848B CN 201510223901 A CN201510223901 A CN 201510223901A CN 104916848 B CN104916848 B CN 104916848B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 105
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 101
- 239000010439 graphite Substances 0.000 claims abstract description 101
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000005485 electric heating Methods 0.000 claims abstract description 10
- 239000000123 paper Substances 0.000 claims description 97
- 150000001875 compounds Chemical class 0.000 claims description 10
- 229920002994 synthetic fiber Polymers 0.000 claims description 10
- -1 polypropylene Polymers 0.000 claims description 9
- 239000004758 synthetic textile Substances 0.000 claims description 8
- 239000004575 stone Substances 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 4
- 229910021389 graphene Inorganic materials 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 239000012209 synthetic fiber Substances 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 abstract description 16
- 239000007772 electrode material Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 7
- 150000002739 metals Chemical class 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 9
- 230000010287 polarization Effects 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 229910052493 LiFePO4 Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910002986 Li4Ti5O12 Inorganic materials 0.000 description 2
- 229910010710 LiFePO Inorganic materials 0.000 description 2
- 229910018095 Ni-MH Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910018477 Ni—MH Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The method for improving battery low-temperature startup performance, is related to the method for improving start battery performance at low ambient temperatures.Voltage and discharge capacity are low during the present invention is to solve existing battery cold-starting, the problem of performance is not good.The present invention is not change battery material and electrolyte, and under conditions of not significantly changing internal structure and preparation technology, substituted completely with flexible graphite paper or part alternative metals as electrode collector, or using graphite paper be placed directly within both positive and negative polarity between be used as electric heating element, by applying external power supply to graphite paper, it is set to generate heat rapidly, so as to realize the quick heating to electrode material and electrolyte, the temperature of inside battery is set to raise rapidly, realize that cell discharge voltage and discharge capacity can be close to normal temperature values in the short time, so as to effectively solve the problem of performance significantly decays during battery cold-starting.For secondary cell field.
Description
Technical field
The present invention relates to a kind of method for improving battery low-temperature startup performance.
Background technology
Current various secondary cells exist one it is common the problem of, be exactly at low ambient temperatures its performance show compared with normal temperature
Write and be deteriorated, be in particular in that discharge voltage is declined to a great extent, discharge capacity is declined to a great extent, charging rate is significantly reduced, and causes electricity
Battery capacity cannot effectively play, can not meet design and use requirement at low ambient temperatures in pond.Such as lithium ion battery-
40 DEG C of discharge capacities only have 50% or so of room temperature capacity, can not start substantially at -50 DEG C；Lead-acid battery temperature there is not decline
1 degree, capacity attenuation about 1%.Battery cryogenic property it is not good, seriously constrain electric automobile, electric bus, electric bicycle
Deng promoting the use of on northern cold ground so that conventional fuel oil automobile starting is difficult, and military special type battery is difficult to ensure that in pole
The operational need in cold area etc..Therefore, the method for exploitation raising battery cryogenic property is extremely important.
The principal element of influence battery cryogenic property has：(1) the ion transporting of electrolyte declines under low temperature, including low temperature
The viscosity increase of lower solvent, ionic mobility reduces, and causes electrical conductivity to reduce, ohmic polarization increase；Electrolytic salt is low simultaneously
The lower solubility of temperature declines, and local-crystalized phenomenon occurs；In addition, participating in the battery of reaction, such as lead-acid battery and nickel for electrolyte
Hydrogen battery etc., concentration polarization increases under low temperature.(2) low temperature bottom electrode reaction rate is slack-off, causes the activation polarization of both positive and negative polarity
Aggravation.For lithium ion battery, embedded abjection reaction speed of the lithium ion in positive and negative pole material declines under low temperature；For
The electrochemical reaction speed of its positive pole and negative pole declines under lead-acid battery and Ni-MH battery, low temperature.It is electrochemical caused by above-mentioned low temperature
Polarization, concentration polarization and the aggravation of ohmic polarization degree are learned, causes cell discharge voltage, discharge capacity and big multiplying power discharging property
There is significant decline.For these reasons, battery cryogenic property is improved at present mainly from each composition material of inside battery
Material, which is started with, researchs and solves scheme, including the new electrode material of exploitation, new electrolyte system, and optimizes the preparation technology of battery
Deng the progress of current this respect is very slow.Another resolving ideas is to install pre-heating system additional to outside batteries, and this aspect increases
The weight and volume in pond is powered up, the complexity of battery system is added, the use to battery brings inconvenience, while heating is by extroversion
Interior, heating is slow and uneven, nor effectively solving the method for battery cryogenic property.Therefore, develop simple out of battery
Portion realizes the problem of method that electrode material and electrolyte are rapidly heated can solve battery low temperature, so as to improve the environment of battery
Applicability is most important.The Low Temperature Problems of battery, are mainly and at start battery initial stage, after normal battery operation, what it was produced
Heat can maintain battery to work at a suitable temperature.
Ultra-thin flexible graphite paper with can swollen graphite through special process compacting form.Its density is about 1.0g/cm3Extremely
1.8g/cm3, it is lighter than aluminium by 25%, it is lighter than copper by 75%.There is excellent heat resistance and cold resistance, at -200 DEG C~450 DEG C (in oxidation
In medium) within the temperature range of its physical property almost without what change；Have excellent chemically-resistant and electrochemistry rotten simultaneously
Corrosion energy and electric conductivity；In-plane thermal conductivity is up to 1200W/mK and heat conduction is uniform for its；Any table can be smoothly attached to
Face and curved surface, and shape can be changed according to demand.Particular, it is important that ultrathin flexible graphite paper or a kind of splendid
Electroluminescent exothermic material, in the presence of DC voltage, it is possible to achieve rapidly and uniformly heat effect, in achievable temperature rise in several seconds
More than 40 degree.These above-mentioned properties allow ultrathin flexible graphite paper as the electric heating element of inside battery, are equipped with outer power-up
Source, realizes that battery temperature is evenly and rapidly lifted.
The content of the invention
Voltage and discharge capacity are low during the present invention is to solve existing battery cold-starting, and performance is not good to ask
There is provided the method for improving battery low-temperature startup performance for topic.
The method that the present invention improves battery low-temperature startup performance, be specially：
For using metal foil for the lithium ion battery of collector, with flexible graphite paper alternative metals paper tinsel as collector,
On the lug that external power supply is connected directly between to graphite paper collector, 1~220V of heating voltage scope, the soft graphite are controlled
The thickness of paper is 0.01~1.0mm.
Because electrode material and electrolyte are directly contacted with graphite paper collector, so as to realize to the fast of the whole battery core of battery
Fast uniform heating.
Another method for improving battery low-temperature startup performance of the present invention, be specially：
For using the battery of screen or foam metal for collector, the flexible graphite paper with hole to be used as to electric heating member
Part, is placed between the positive pole of battery and negative pole, and connection sheet is individually drawn from flexible graphite paper, and external power supply is connected directly between
In the connection sheet of graphite paper, 1~220V of heating voltage scope is controlled, a diameter of 0.01~1mm of the hole, pore area is accounted for
Than 10%~60%, hole be evenly distributed on flexible graphite paper with the range of electrode slice equidimension, the flexible graphite paper
Thickness be 0.01~1.0mm.
Because electrolyte is directly contacted with graphite paper heating plate, electrolyte is heated rapidly first, then band moving electrode material
Material heating, so as to realize the rapid rise of internal temperature of battery.
External power supply can directly use ultracapacitor, it is possible to use the capacity of battery in itself, it is possible to use battery
Charge power supply etc..
There are lead-acid battery, Ni-MH battery etc. using screen or foam metal for the battery of collector.
The essence of the present invention is to introduce flexible graphite paper as heating element heater in inside battery, while battery can also be used as
A part (collector), provide electric energy using additional power source or battery itself, using the electric heating property that graphite paper is excellent, make soft
Property graphite paper be brought rapidly up in a short time, so as to realize from inside battery to the quick heating of battery, solve battery cryogenic property
The shortcoming of difference.
Beneficial effects of the present invention：
(1) flexible graphite paper is lighter, alternative metals collector, is conducive to improving the specific energy of energy-storage travelling wave tube.Its machine
Tool good processability, will not generate burr and pierce through barrier film.Mechanical flexibility is good, and any type of add can be done according to demand
Work；
(2) flexible graphite paper is as a kind of electric heating element, and its heat production is uniform, and heat production is fast.Because flexible graphite paper is directly planted
Enter inside battery, or directly serve as the part (collector) of battery, it is integrated with heating system to realize battery, Ke Yicong
Inside battery carries out quick heat temperature raising to battery.Slow external heat, heating inequality are overcome, causes battery system complicated and makes
The problem of using inconvenience.
(3) flexible graphite paper chemistry and stable electrochemical property in organic electrolyte system and washing electrolyte system,
Thus different from other electric heating elements, flexible graphite paper can be placed directly within inside battery, therefore structure, the preparation technology of battery
Etc. being not required to make big change, processed using existing production line, reduce investment.
(4) external heating power supply mode is flexible, it is possible to use battery itself, can also utilize charge power supply of battery etc..
It is characteristic of the invention that under conditions of battery material, electrolyte and internal structure is not significantly changed, using flexible stone
Black paper completely substitute or part alternative metals as electrode collector, or using graphite paper be placed directly within both positive and negative polarity between as
Electric heating element, by giving graphite paper to apply external power supply, makes it generate heat rapidly, so as to realize to the fast of electrode material and electrolyte
Speed heating, makes the temperature of inside battery raise rapidly, so, even if battery is chronically under low temperature environment, utilizes the present invention's
Method, is heated by the short time, and then its discharge voltage and discharge capacity can produce by itself when in use close to normal temperature value
Raw heat, it is ensured that normal battery operation, so that the problem of performance significantly decays when effectively solving battery cold-starting.
The method that can be achieved quickly to carry out heat temperature raising to electrode material and electrolyte from the inner homogeneous of battery,
Brief description of the drawings
Fig. 1 is the schematic diagram heated using flexible graphite paper collector to battery core.
Embodiment
Technical solution of the present invention is not limited to act embodiment set forth below, in addition between each embodiment
Any combination.
Embodiment one：The method that present embodiment improves battery low-temperature startup performance, it is characterised in that this method
Specially：
For using metal foil for the lithium ion battery of collector, with flexible graphite paper alternative metals paper tinsel as collector,
On the lug that external power supply is connected directly between to graphite paper collector, 1~220V of heating voltage scope, the soft graphite are controlled
The thickness of paper is 0.01~1.0mm.
In battery system, the collector that ultrathin flexible graphite paper serves as electrode is introduced, by applying voltage to it, is realized
To the uniform quick heating of electrode material and electrolyte inside battery core, so as to lift the temperature of battery rapidly so that battery is
Make to store in low temperature environment, can still keep high charge-discharge performance, solve the problem of battery cryogenic property is not good.
Embodiment two：Present embodiment from unlike embodiment one：The flexible graphite paper is substituted
All or part of Al paper tinsels as lithium ion cell positive collector.It is other identical with embodiment one.
Embodiment three：Present embodiment from unlike embodiment one：The flexible graphite paper is substituted
All or part of Cu paper tinsels as negative electrode of lithium ion battery collector.It is other identical with embodiment one.
Embodiment four：Present embodiment from unlike embodiment one：The flexible graphite paper is substituted
Whole Al paper tinsels as lithium ion cell positive collector, while substitute whole Cu paper tinsels as negative electrode of lithium ion battery afflux
Body.It is other identical with embodiment one.
Embodiment five：Present embodiment from unlike embodiment one：The flexible graphite paper is substituted
Part Al paper tinsels as lithium ion cell positive collector, while substitute part Cu paper tinsels as negative electrode of lithium ion battery afflux
Body.It is other identical with embodiment one.
Embodiment six：Unlike one of present embodiment and embodiment one to five：The flexible stone
Black paper is that flexible graphite paper, graphite and synthetic fibers prepared by flexible graphite paper, artificial synthesized graphite prepared by native graphite are knitted
The flexible compound graphite paper that the compound flexible compound graphite paper constituted of thing, graphene and synthetic fabrics are constituted, the synthesis
Fabric is polypropylene, polyethylene, fine polypropylene, polyamide or polyester.Other phases one of with embodiment one to five
Together.
Graphite described in present embodiment is existing with the compound method for constituting flexible compound graphite paper of synthetic fabrics
Conventional method, the method that graphene constitutes flexible compound graphite paper with synthetic fabrics is existing conventional method.
Embodiment seven：Unlike one of present embodiment and embodiment one to six：The flexible stone
The thickness of black paper is 0.015~0.025mm.It is other identical with one of embodiment one to six.
Embodiment eight：Unlike one of present embodiment and embodiment one to six：The flexible stone
The thickness of black paper is 0.025~0.07mm.It is other identical with one of embodiment one to six.
Embodiment nine：The method that present embodiment improves battery low-temperature startup performance, it is characterised in that this method
Specially：
For using the battery of screen or foam metal for collector, the flexible graphite paper with hole to be used as to electric heating member
Part, is placed between the positive pole of battery and negative pole, and connection sheet is individually drawn from flexible graphite paper, and external power supply is connected directly between
In the connection sheet of graphite paper, 1~220V of heating voltage scope is controlled, a diameter of 0.01~1mm of the hole, pore area is accounted for
Than 10%~60%, hole be evenly distributed on flexible graphite paper with the range of electrode slice equidimension, the flexible graphite paper
Thickness be 0.01~1.0mm.
In battery system, ultrathin flexible graphite paper is introduced as electric heating element, by applying voltage to it, is realized from electricity
Uniform quick heating of the core inner to electrode material and electrolyte, thus rapidly lifted battery temperature so that battery even in
Low temperature environment is stored, and can still keep high charge-discharge performance, solves the problem of battery cryogenic property is not good.
Embodiment ten：Present embodiment from unlike embodiment nine：The flexible graphite paper is day
Flexible graphite paper, graphite and synthetic fabrics prepared by flexible graphite paper, the artificial synthesized graphite of right graphite preparation is combined structure
Into flexible compound graphite paper, the flexible compound graphite paper that constitutes of graphene and synthetic fabrics, the synthetic fabrics
For polypropylene, polyethylene, fine polypropylene, polyamide or polyester.It is other identical with embodiment nine.
Embodiment 11：Present embodiment from unlike embodiment nine：By the flexibility with hole
Graphite paper is placed between all positive poles of battery and negative pole.It is other identical with embodiment nine.
Embodiment 12：Present embodiment from unlike embodiment nine：By the flexibility with hole
Graphite paper is placed between the part positive pole of battery and negative pole.It is other identical with embodiment nine.
Embodiment 13：Present embodiment from unlike embodiment nine to one of 12：It is described soft
Property graphite paper thickness be 0.015~0.025mm.It is other identical with embodiment nine to one of 12.
Embodiment 14：Present embodiment from unlike embodiment nine to one of 12：It is described soft
Property graphite paper thickness be 0.025~0.07mm.It is other identical with embodiment nine to one of 12.
For checking beneficial effects of the present invention, following test is carried out：
Flexible graphite paper used in following examples is flexible graphite paper prepared by native graphite, and thickness is 0.03mm.
Embodiment 1：
Using 0.03mm flexible graphite papers as the collector of positive and negative electrode, by LiFePO4Positive electrode is coated in soft graphite
As positive pole on paper, by Li4Ti5O12Negative material is coated on flexible graphite paper as negative pole, and design is prepared for as shown in Figure 1
5Ah LiFePO4/Li4Ti5O121 is flexible graphite paper collector in soft-package battery, Fig. 1, and 2 be barrier film.
At -20 DEG C, applying to flexible graphite paper negative current collector two ends can be by battery temperature liter in 9V DC voltages, 4s
Height is to 0 DEG C, and 10s can be raised to 10 DEG C, and 15s rises to 18 DEG C.At -30 DEG C, to flexible graphite paper positive pole and negative current collector two ends
Battery temperature can be increased to 0 DEG C by applying simultaneously in 9V DC voltages, 5s, and 120s rises to 20 DEG C.Battery 1C at -20 DEG C discharges
Voltage 1V, discharge capacity 3.1Ah；Electric discharge 1C voltage 1.8V, capacity 4.92Ah after 9V heating 15s.
Embodiment 2：
Using 0.025mm flexible graphite papers as the collector of positive and negative electrode, by LiFePO4Positive electrode is coated in flexible stone
As positive pole on black paper, graphite cathode material is coated on flexible graphite paper and 10Ah LiFePO is assembled as negative pole4/ stone
Black soft-package battery.
At -45 DEG C, applying to the positive and negative collector two ends of flexible graphite paper can be by battery temperature in 24V DC voltages, 19s
0 DEG C is increased to, 28s rises to 19 DEG C.Battery 1C electric discharges no-voltage platform at -45 DEG C；Capacity 1.2Ah；1C after 24V heating 28s
Discharge voltage 3.1V, capacity 9.39Ah.
Embodiment 3：
LiFePO is used as with aluminium4Positive electrode, copper foil assemble 10Ah's as the collector of graphite cathode material
LiFePO4/ graphite soft-package battery.Battery 1C electric discharges no-voltage platform, capacity 1.16Ah at -45 DEG C；1C electric discharges electricity at 19 DEG C
Press 3.08V, capacity 9.3Ah.With the comparative illustration of embodiment 2, substitute aluminium foil with flexible graphite paper and copper foil is used as lithium ion battery
Collector, do not interfere with the chemical property of battery.
Embodiment 4：
0.03mm is installed additional between all both positive and negative polarities of the common lead-acid accumulators of 2V50Ah with the non-porous of pole piece equidimension to surpass
Thin flexible graphite paper and the ultrathin flexible graphite paper (micro-pore diameter 0.5mm ,/square centimeter of hole density 100) for getting micropore, plant
Enter the battery of the non-porous graphite paper 0.1C discharge capacities 8Ah at 25 DEG C, be implanted into the battery of the graphite paper with holes 0.1C at 25 DEG C and put
Capacitance 48Ah, illustrates that non-porous graphite paper has obstructed the transmission of electrolyte, causes battery capacity to decline, the graphite paper of perforate is to electricity
The capacity in pond is substantially without influence.Apply 12V DC voltages at all perforate graphite paper heating plate two ends, after 27s battery temperature by-
30 DEG C rise to 0 DEG C, and 25 DEG C are risen to after 39s.Battery 0.1C discharge capacities 24Ah, 0.5C discharge capacity 11Ah, 12V at -30 DEG C
Heat after 40s, 0.1C discharge capacities 48Ah, 0.5C discharge capacity 42Ah.After 24V heating 18s, 0.1C discharge capacity 47Ah,
0.5C discharge capacities 40Ah.
Claims (4)
1. improve the method for battery low-temperature startup performance, it is characterised in that this method is specially：
For using the battery of screen or foam metal for collector, using the flexible graphite paper with hole as electric heating element,
It is placed between the positive pole of battery and negative pole, connection sheet is individually drawn from flexible graphite paper, external power supply is connected directly between stone
In the connection sheet of black paper, 1~220V of heating voltage scope, a diameter of 0.01~1mm of the hole, pore area accounting are controlled
10%~60%, hole be evenly distributed on flexible graphite paper with the range of electrode slice equidimension, the flexible graphite paper
Thickness is 0.01~1.0mm.
2. the method according to claim 1 for improving battery low-temperature startup performance, it is characterised in that the flexible graphite paper
Flexible graphite paper, graphite and synthetic fabrics prepared by flexible graphite paper, the artificial synthesized graphite prepared for native graphite is multiple
Close the flexible compound graphite paper that the flexible compound graphite paper constituted, graphene and synthetic fabrics are constituted, the synthetic fibers
Fabric is polypropylene, polyethylene, fine polypropylene, polyamide or polyester.
3. the method according to claim 1 or 2 for improving battery low-temperature startup performance, it is characterised in that by with hole
Flexible graphite paper is placed between all positive poles of battery and negative pole.
4. the method according to claim 1 or 2 for improving battery low-temperature startup performance, it is characterised in that by with hole
Flexible graphite paper is placed between the part positive pole of battery and negative pole.
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| CN106532189A (en) * | 2016-12-09 | 2017-03-22 | 厦门华戎能源科技有限公司 | Nano carbon crystal heating battery |
| CN106532190A (en) * | 2016-12-09 | 2017-03-22 | 厦门华戎能源科技有限公司 | Rapid heating battery |
| CN106602103A (en) * | 2016-12-23 | 2017-04-26 | 中国矿业大学(北京) | Quick self-heating starting method of solid oxide fuel cell and material |
| CN106898729A (en) * | 2017-03-27 | 2017-06-27 | 浙江大学 | Flexible current-collecting body, electrode and battery comprising the flexible current-collecting body |
| CN109216752B (en) * | 2017-06-29 | 2020-12-29 | 青岛恒金源电子科技有限公司 | Low-temperature lithium ion battery pack |
| CN207967201U (en) * | 2018-01-26 | 2018-10-12 | 宁德时代新能源科技股份有限公司 | Secondary cell |
| DE102018123910B4 (en) * | 2018-09-27 | 2024-03-21 | Webasto SE | Battery, preferably lithium-ion battery |
| CN109390643A (en) * | 2018-10-11 | 2019-02-26 | 南京宁智高新材料研究院有限公司 | A kind of three-diemsnional electrode heating means being cold-started at low temperature for battery |
| CN109244599B (en) * | 2018-10-30 | 2021-09-21 | 宁德时代新能源科技股份有限公司 | Composite negative pole piece with rapid heating function, and battery cell and battery adopting composite negative pole piece |
| CN110137501A (en) * | 2019-03-29 | 2019-08-16 | 中国科学院青岛生物能源与过程研究所 | A kind of flexibility high-voltage lithium ion batteries and preparation method thereof |
| CN111477995A (en) * | 2020-06-01 | 2020-07-31 | 西安电子科技大学芜湖研究院 | New energy battery heating starting mechanism in low-temperature environment |
| US11936028B1 (en) | 2020-07-13 | 2024-03-19 | Ampcera Inc. | Systems and methods for heating electrochemical systems |
| CN114361606B (en) * | 2020-09-28 | 2023-08-08 | 比亚迪股份有限公司 | Pole core, battery and battery module |
| CN112599785B (en) * | 2021-03-03 | 2021-05-18 | 浙江艾罗网络能源技术股份有限公司 | Self-temperature-control current collector of lithium ion battery and preparation method and application thereof |
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| CN103682368B (en) * | 2012-09-20 | 2016-08-17 | 中国科学院金属研究所 | A kind of flexible lithium ion battery filled soon and the preparation method of electrode thereof |
| CN104008888A (en) * | 2014-06-13 | 2014-08-27 | 上海利物盛企业集团有限公司 | Preparation method of composite material and electrode slice for super capacitor |
| CN104485478A (en) * | 2014-11-07 | 2015-04-01 | 东莞市鸿德电池有限公司 | Flexible lithium ion battery and preparation method thereof |
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