CN104934652A - Lithium ion battery surface temperature reducing method - Google Patents
Lithium ion battery surface temperature reducing method Download PDFInfo
- Publication number
- CN104934652A CN104934652A CN201410108008.XA CN201410108008A CN104934652A CN 104934652 A CN104934652 A CN 104934652A CN 201410108008 A CN201410108008 A CN 201410108008A CN 104934652 A CN104934652 A CN 104934652A
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- China
- Prior art keywords
- battery
- surface temperature
- temperature
- lithium ion
- coating agent
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- 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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- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention discloses a lithium ion battery surface temperature reducing method which comprises the following three steps: 1, nano-TiO2 powder is synthesized by sol-gel method; 2, the obtained TiO2 powder is added with a mixture for ball milling and dispersion, then added with acrylic resin and dispersed to form a coating agent; and 3, the coating agent is sprayed on the steel casing outer wall of individual cells. Compared with the prior art, the coating agent is sprayed on the steel casing outer wall of the individual cells to form a radiation-cooling heat-insulating material, when the surface temperature of the battery is elevated, the battery radiates outside for heat radiation to reduce the battery surface temperature, in addition, when the outside temperature is higher than the battery temperature, the material has a thermal insulation effect so as to ensure the battery has a lower temperature, and the safety performance of the battery is improved.
Description
[technical field]
The present invention relates to field of lithium ion battery, particularly relate to a kind of method reducing surface temperature of lithium ion battery.
[background technology]
Temperature is one of topmost parameter in electric automobile power battery system, also be the topmost parameter affecting battery performance, in all detection systems of battery, temperature must be indicated, reason is exactly that temperature is larger on battery performance impact, comprises the internal resistance of battery, charging performance, discharge performance, fail safe, life-span etc.In the course of the work, particularly discharge and recharge under big current, or super-charge super-discharge, can produce a large amount of heats to battery, and battery surface temperature also can sharply rise, and finally can cause battery thermal runaway, thus battery capacity occurs, hydraulic performance declines such as circulation or blast.Therefore, the heat dispersion of battery is an important indicator of battery performance.
For safest LiFePO4 battery, cell is 5AH, in 3C charging process, the temperature rise of battery reaches 20 DEG C, 5C electric discharge temperature rise reaches 25-30 DEG C, add ambient temperature, battery surface temperature about 50 DEG C, and now the internal temperature of battery can be higher, if with higher multiplying power discharging or battery short circuit or the lithium ion battery using other material, the surface temperature of battery can more than 50 DEG C.
Current cool-down method traditional in the industry, mainly by the surfacing of battery case from heat radiation, and on casing provided with fan design air duct.These two kinds of methods for small-sized single battery case effect still can, if but for the stack battery case of electric bus, the radiating effect particularly when summer is run under hot environment then cannot reach safety standard.
In view of above drawback, be necessary in fact to provide a kind of method reducing surface temperature of lithium ion battery to overcome above-mentioned defect.
[summary of the invention]
The object of this invention is to provide a kind of method reducing surface temperature of lithium ion battery, it effectively can improve the heat dispersion of battery.
To achieve these goals, the present invention adopts following technical scheme: a kind of method reducing surface temperature of lithium ion battery, and it comprises three steps, the first step: utilize sol-gal process synthesis of nano TiO2 powder; Second step: obtained TiO2 powder added intermixture and carries out ball milling, dispersion, and then add acrylic resin and disperse, forms coating agent; 3rd step: coating agent is sprayed on the box hat outer wall of cell.
The first step comprises the following steps:
(1) with the organic titanium acid butyl ester of pure chemistry for presoma, first be dissolved in absolute ethyl alcohol, by stirring and adding glacial acetic acid or acetylacetone,2,4-pentanedione as inhibitor, make it to react with butyl titanate to form chelate, thus control butyl titanate is evenly hydrolyzed, reduce the reunion of hydrolysate, obtain the tiny and uniform colloidal solution of particle;
(2) in colloidal sol, add deionized water, make colloidal particle form a kind of skeleton structure of opening, colloidal sol loses flowability formation gel gradually;
(3) under the constant temperature of 60 DEG C, vacuumize being carried out to gel, by adding moisture, organic group and the organic solvent in heat abstraction gel, obtaining yellow crystals;
(4) put into box resistance furnace after being ground by crystal, be first warming up to 250 DEG C of calcinations, insulation 1h, then be warming up to and temperature requiredly activate it, the organic principle in removing gel, obtains the nanometer TiO_2 powder of white.
Second step comprises the following steps:
(1) by obtained TiO2 powder 10-30 part and silicone couplet 0.2-0.7 part ball milling 3-4h;
(2) after the product of gained adds 60 parts of moisture ball milling 3h in (1), 30min is disperseed again;
(3) add acrylic resin 10-40 part, and disperse 30min.
The invention has the beneficial effects as follows: utilize sol-gal process synthesis of nano TiO2 powder, again obtained TiO2 powder added intermixture and carry out ball milling, add acrylic resin again after dispersion and disperse, form coating agent, finally coating agent is sprayed on the box hat outer wall of cell, to form a kind of radiation cooling heat-barrier material, when battery surface temperature raises, externally heat loss through radiation thus reduce battery surface temperature, in addition, when external temperature is higher than battery temperature, this material has heat-blocking action, thus ensure that battery has lower temperature, improve the security performance of battery.
[accompanying drawing explanation]
Fig. 1 is a kind of coat profile reducing the method for surface temperature of lithium ion battery of the present invention;
Fig. 2 is a kind of coat vertical view reducing the method for surface temperature of lithium ion battery of the present invention;
[embodiment]
Please refer to shown in Fig. 1, Fig. 2, below in conjunction with case study on implementation, the invention will be further described.
The present invention adopts with the following method, and it comprises three steps, the first step: utilize sol-gal process synthesis of nano TiO2 powder; Second step: obtained TiO2 powder added intermixture and carries out ball milling, dispersion, and then add acrylic resin and disperse, forms coating agent; 3rd step: coating agent is coated on the box hat outer wall of cell in EFI mode.
The first step comprises the following steps:
(1) with the organic titanium acid butyl ester Ti (OC4H9) 4 of pure chemistry for presoma, first be dissolved in absolute ethyl alcohol, by stirring and adding glacial acetic acid or acetylacetone,2,4-pentanedione as inhibitor, make it to react with butyl titanate to form chelate, thus control butyl titanate is evenly hydrolyzed, reduce the reunion of hydrolysate, obtain the tiny and uniform colloidal solution of particle;
(2) in colloidal sol, add deionized water, make colloidal particle form a kind of skeleton structure of opening, colloidal sol loses flowability formation gel gradually;
(3) under the constant temperature of 60 DEG C, vacuumize being carried out to gel, by adding moisture, organic group and the organic solvent in heat abstraction gel, obtaining yellow crystals;
(4) put into box resistance furnace after being ground by crystal, be first warming up to 250 DEG C of calcinations, insulation 1h, then be warming up to and temperature requiredly activate it, the organic principle in removing gel, obtains the nanometer TiO_2 powder of white.
Second step comprises the following steps:
(1) by obtained TiO2 powder 10-30 part and silicone couplet 0.2-0.7 part ball milling 3-4h;
(2) after the product of gained adds 60 parts of moisture ball milling 3h in (1), 30min is disperseed again;
(3) add acrylic resin 10-40 part, and disperse 30min.
3rd step: coating agent is coated on the box hat outer wall of cell in EFI mode.
When battery surface temperature raises, its heat energy can by the externally heat loss through radiation of the coating agent on battery case, thus reduce battery surface temperature, in addition, distribute when the heat energy of all batteries and to concentrate in battery case until after the temperature inside the box uprises, because coating agent has heat-blocking action, also can temperature can not pass back in battery, ensure that battery has lower temperature, improve the security performance of battery.
A kind of method reducing surface temperature of lithium ion battery of the present invention, be not restricted to described in specification and execution mode, therefore additional advantage and amendment can easily be realized for the personnel of familiar field, therefore when not deviating from the spirit and scope of the universal that claim and equivalency range limit, this
Invention is not limited to specific details, representational equipment and illustrates here and the examples shown described.
Claims (3)
1. reduce a method for surface temperature of lithium ion battery, it is characterized in that, the method comprises three steps, and the first step utilizes sol-gal process synthesis of nano TiO2 powder; Obtained TiO2 powder is added intermixture and carries out ball milling, dispersion by second step, and then adds acrylic resin and disperse, and forms coating agent; Coating agent is sprayed on the box hat outer wall of cell by the 3rd step.
2. a kind of method reducing surface temperature of lithium ion battery according to claim 1, is characterized in that: the described first step utilizes sol-gal process synthesis of nano TiO2 powder, and it specifically comprises the following steps:
(1) with the organic titanium acid butyl ester of pure chemistry for presoma, first be dissolved in absolute ethyl alcohol, by stirring and adding glacial acetic acid or acetylacetone,2,4-pentanedione as inhibitor, make it to react with butyl titanate to form chelate, thus control butyl titanate is evenly hydrolyzed, reduce the reunion of hydrolysate, obtain the tiny and uniform colloidal solution of particle;
(2) in colloidal sol, add deionized water, make colloidal particle form a kind of skeleton structure of opening, colloidal sol loses flowability formation gel gradually;
(3) under the constant temperature of 60 DEG C, vacuumize being carried out to gel, by adding moisture, organic group and the organic solvent in heat abstraction gel, obtaining yellow crystals;
(4) put into box resistance furnace after being ground by crystal, be first warming up to 250 DEG C of calcinations, insulation 1h, then be warming up to and temperature requiredly activate it, the organic principle in removing gel, obtains the nanometer TiO_2 powder of white.
3. a kind of method reducing surface temperature of lithium ion battery according to claim 1, it is characterized in that: obtained TiO2 powder is added intermixture and carries out ball milling, dispersion by described second step, and then add acrylic resin and disperse, form coating agent, comprise the following steps:
(1) by obtained TiO2 powder 10-30 part and silicone couplet 0.2-0.7 part ball milling 3-4h;
(2) after the product of gained adds 60 parts of moisture ball milling 3h in (1), 30min is disperseed again;
(3) add acrylic resin 10-40 part, and disperse 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410108008.XA CN104934652A (en) | 2014-03-21 | 2014-03-21 | Lithium ion battery surface temperature reducing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410108008.XA CN104934652A (en) | 2014-03-21 | 2014-03-21 | Lithium ion battery surface temperature reducing method |
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| CN104934652A true CN104934652A (en) | 2015-09-23 |
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| CN201410108008.XA Pending CN104934652A (en) | 2014-03-21 | 2014-03-21 | Lithium ion battery surface temperature reducing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950428A (en) * | 2017-12-21 | 2019-06-28 | 成都市银隆新能源有限公司 | Battery case and its manufacturing process |
| CN110016274A (en) * | 2019-02-28 | 2019-07-16 | 常州五荣化工有限公司 | A kind of preparation method of composite heat dissipation material |
| RU2791288C1 (en) * | 2020-04-14 | 2023-03-07 | Энертек Интернэшнл, Инк. | Battery for electric vehicles with improved cooling performance |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197457A (en) * | 2006-12-31 | 2008-06-11 | 万向集团公司 | Lithium ion battery suitable for low-temperature environment |
| CN102117905A (en) * | 2009-12-30 | 2011-07-06 | 上海比亚迪有限公司 | Composite diaphragm, preparation method and battery thereof |
| CN102249300A (en) * | 2011-05-12 | 2011-11-23 | 陕西鸿禧新材料有限公司 | Preparation method of black titanium dioxide |
| CN102569680A (en) * | 2012-02-29 | 2012-07-11 | 东莞市比比克电子科技有限公司 | Lithium ion secondary battery case with thermal insulation layer, and lithium ion battery |
| CN103387787A (en) * | 2013-06-13 | 2013-11-13 | 东莞上海大学纳米技术研究院 | Organic/inorganic hybrid transparent heat-insulating coating material, and preparation method and application thereof |
-
2014
- 2014-03-21 CN CN201410108008.XA patent/CN104934652A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197457A (en) * | 2006-12-31 | 2008-06-11 | 万向集团公司 | Lithium ion battery suitable for low-temperature environment |
| CN102117905A (en) * | 2009-12-30 | 2011-07-06 | 上海比亚迪有限公司 | Composite diaphragm, preparation method and battery thereof |
| CN102249300A (en) * | 2011-05-12 | 2011-11-23 | 陕西鸿禧新材料有限公司 | Preparation method of black titanium dioxide |
| CN102569680A (en) * | 2012-02-29 | 2012-07-11 | 东莞市比比克电子科技有限公司 | Lithium ion secondary battery case with thermal insulation layer, and lithium ion battery |
| CN103387787A (en) * | 2013-06-13 | 2013-11-13 | 东莞上海大学纳米技术研究院 | Organic/inorganic hybrid transparent heat-insulating coating material, and preparation method and application thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950428A (en) * | 2017-12-21 | 2019-06-28 | 成都市银隆新能源有限公司 | Battery case and its manufacturing process |
| CN110016274A (en) * | 2019-02-28 | 2019-07-16 | 常州五荣化工有限公司 | A kind of preparation method of composite heat dissipation material |
| RU2791288C1 (en) * | 2020-04-14 | 2023-03-07 | Энертек Интернэшнл, Инк. | Battery for electric vehicles with improved cooling performance |
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Application publication date: 20150923 |