CN105895985A - Heat absorption device during package of flexible membrane and fabrication method of heat absorption device - Google Patents
Heat absorption device during package of flexible membrane and fabrication method of heat absorption device Download PDFInfo
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- CN105895985A CN105895985A CN201510455115.4A CN201510455115A CN105895985A CN 105895985 A CN105895985 A CN 105895985A CN 201510455115 A CN201510455115 A CN 201510455115A CN 105895985 A CN105895985 A CN 105895985A
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- flexible membrane
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- heat absorption
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- 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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Abstract
The invention discloses a heat absorption device during package of a flexible membrane and a fabrication method of the heat absorption device. The heat absorption device comprises a flexible membrane shell and a heat absorption phase-change mixture, wherein the heat absorption phase-change mixture is filled and packaged in the flexible membrane shell and comprises a phase-change main body material, a heat conduction filler and a thickening agent, the phase-change main body material accounts for 70-90% (mass), the heat conduction filler accounts for 5-29% (mass), and the thickening agent accounts for 1-5% (mass). The flexible membrane is taken as the shell of the heat absorption material and is cheap, and the heat absorption material matched with a lithium battery can be easily produced and processed by using the heat absorption device; the flexible membrane is a polymer membrane, has heat sealing performance and is difficult to leak after package; phase-change main body materials with different phase-change temperatures can be selected according to different conditions; with the addition of the heat conduction filler, heat is more rapidly transferred in the heat absorption material, and the heat of all parts of the heat absorption material is more uniform; and by using the thickening agent, the problem of settling of the heat conduction filler in a liquid-state phase-change main body material is solved, and the heat conduction filler is more uniformly dispersed.
Description
Technical field
The invention belongs to battery heat-absorbing material technical field, heat sink of a kind of flexible membrane encapsulation and preparation method thereof, can be applicable to the thermal management of high-rate lithium battery.
Background technology
High-rate lithium battery operationally, can produce substantial amounts of heat in several minutes, traditional radiating mode is to carry out passive heat radiation with metal partion (metp), and the heat of lithium battery is transferred on metal partion (metp), and dividing plate contacts with metal shell, and heat is passed to shell.Such scheme has a several defect: the temperature of metal partion (metp) is risen to the highest by substantial amounts of heat, and the temperature of heater and whole system is the highest；Metal partion (metp) takies much room, and the energy density per unit volume causing whole system is the highest；Metal partion (metp) can not insulate, and easily causes battery short circuit, increasingly can not meet the heat management needs of the novel lithium battery of high-energy-density.
Summary of the invention
The problem existed for background technology, it is an object of the invention to provide a kind of heat absorptivity more uniformly, heat absorption fast, and the manufacture method of the heat sink of good insulating, the heat sink of flexible membrane encapsulation that reliability is high and the encapsulation of this flexible membrane.Use the battery thermal management system of phase-change material, utilize the phase transformation break of phase-change material to absorb the heat that battery produces, keep the temperature of battery for optimum range for a long time.
For reaching above-mentioned purpose, the heat sink of the flexible membrane encapsulation of present invention design, it is characterized in that: include flexible die housing, fill the heat absorption phase transformation mixture being made up of phase transformation material of main part, heat conductive filler and thickening agent being packaged in flexible membrane housing, wherein: phase transformation material of main part 70%～90%(mass), conductive filler material 5%～29%(mass), thickening agent 1%～5%(mass).
Preferably, one or more during described phase transformation material of main part is paraffin, stearic acid-n-butyl alcohol ester, stearic acid-isopropyl alcohol ester, stearic acid-glycerol three ester, polyurethane block copolymer (PUPCM).
Preferably, one or more during described conductive filler material is graphite, aluminium powder, copper powder.
Preferably, one or more during described thickening agent is sodium stearate, magnesium stearate, aluminium distearate.
Preferably, described flexible membrane is polymer encapsulated film, for one or more layers composite membrane.
The method making the heat sink of above-mentioned flexible membrane encapsulation, comprises the following steps:
One) cut out flexible membrane according to product design shape, rush shell on the flexible film with film forming machine and become product design shape, standby；
Two) having in the stirred tank of divergent function by phase transformation material of main part addition band, be heated to uniform temperature according to the phase transition temperature of the phase transformation material of main part selected, proportionally add conductive filler material and thickening agent, dispersed with stirring is uniform；
Three) the finely dispersed mixture being made up of phase transformation material of main part, heat conductive filler and thickening agent is injected while hot rush in the flexible membrane that casing forming is good, cooling；
Four) turnover flexible membrane, seals the part outer edge of the flexible membrane after turnover according to the physical characteristic heat sealing machine of flexible membrane；
Five) with vacuum pumping sealing port machine evacuation and to step 4) in unsealed outer edge seal, prepare flexible membrane encapsulation heat sink.
Preferably, step 2) described in heating-up temperature be 40 DEG C～80 DEG C.
Preferably, described step 4) in sealing temperature be 180 DEG C～200 DEG C, sealing pressure is 0.3MPa～0.6MPa, and sealing time is 3 seconds～5 seconds.
Preferably, described step 5) in sealing temperature be 180 DEG C～200 DEG C, sealing pressure is 0.3MPa～0.6MPa, and sealing time is 3 seconds～5 seconds, and vacuum values is-0.09MPa～0.1MPa.
In order to ensure compliance with heat-absorbing material life and reliability in use, preferably, flexible membrane is sealed limit and cuts out to 3mm～5mm width, and folded the lateral wall being pasted onto heat-absorbing material housing.
The invention has the beneficial effects as follows: flexible membrane is very cheap as the shell of heat-absorbing material, and utilize the present invention to be easy to go out with production and processing the heat-absorbing material of lithium battery coupling；Flexible membrane is polymeric film, has heat sealability, is difficult to reveal after encapsulation；Phase transformation material of main part can be different according to the condition of use, select the material of different phase transition temperature；The addition of heat conductive filler makes heat transmit in heat-absorbing material faster, and heat-absorbing material each several part heat is evenly；Use thickening agent to solve the problem that heat conductive filler settles in liquid phase-change material of main part, make heat conductive filler dispersion more uniform.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention meets heat-absorbing material, has wherein raised a wherein surface.
Fig. 2 is that flexible membrane of the present invention rushes shell schematic diagram.
Detailed description of the invention
Below by Fig. 1 and Fig. 2 and the mode of some alternative embodiments enumerating the present invention; being described in further detail technical scheme (including optimal technical scheme), any technical characteristic and any technical scheme in the present embodiment are all not intended to protection scope of the present invention.
As shown in Figure 1, the heat sink of the flexible membrane encapsulation of present invention design, it is characterized in that: include flexible membrane housing 1, fill the mixture 2 being made up of phase transformation material of main part, heat conductive filler and thickening agent being packaged in flexible membrane housing 1, wherein: phase transformation material of main part 70%～90%(mass), conductive filler material 5%～29%(mass), thickening agent 1%～5%(mass).
Preferably, one or more during described phase transformation material of main part is paraffin, stearic acid-n-butyl alcohol ester, stearic acid-isopropyl alcohol ester, stearic acid-glycerol three ester, polyurethane block copolymer (PUPCM).
Preferably, one or more during described conductive filler material is graphite, aluminium powder, copper powder.
Preferably, one or more during described thickening agent is sodium stearate, magnesium stearate, aluminium distearate.
Preferably, described flexible membrane is polymer encapsulated film, for one or more layers composite membrane.
The method that the heat sink that make above-mentioned therein partially flexible film encapsulation is given below:
Embodiment one
1. cut out flexible membrane according to product design shape, with film forming machine by flexible die punch forming such as Fig. 2 shape, standby, the size of die cavity and rush the shell degree of depth and can rush deep adjusting performance according to the overall dimensions of lithium battery and flexible membrane；
2. it is that 85% paraffin (60 DEG C of phase change paraffins) adds and has in the stirred tank of divergent function by mass fraction, is heated to 65 DEG C ~ 75 DEG C insulations；
The most proportionally adding mass fraction is the sodium stearate of 2%, opens stirring 5 minutes, opens dispersion, and rotating speed is 3000 revs/min, disperses 15 minutes；
4. adding the copper powder (200 mesh) that mass fraction is 13%, stir, disperse 30 minutes, measuring viscosity is 6000～10000Pa s, insulation；
5. being injected by the mixture of above-mentioned heat rushes in the flexible membrane die cavity that casing forming is good, cooling；
6., by flexible die along broken line 3 doubling, with heat sealing machine, the first of flexible die the outer edgewise 4 and the second outer edgewise 5 are encapsulated；
7. with vacuum pumping sealing port machine, the 3rd outer edgewise 6 vacuum-pumping and sealing is sealed, make and meet heat-absorbing material；
Above-mentioned use heat sealing machine, vacuum pumping sealing port machine parameter is: heat-sealing head temperature is 180 DEG C～200 DEG C, compressed air 0.3MPa～0.6MPa, and vacuum is-0.09MPa～0.1MPa, and packaging time is 3～5 seconds.
Preferably, the first to the 3rd outer edgewise 4-6 is sheared to 3～5mm, after being turned up along die cavity thickness direction by the first to the 3rd outer edgewise 4-6, is bonded at die cavity lateral wall with the Kapton Tape of 3～5mm.
Embodiment two
1. cut out flexible membrane according to product design shape, with film forming machine by flexible die punch forming such as Fig. 2 shape, standby, the size of die cavity and rush the shell degree of depth and can rush deep adjusting performance according to the overall dimensions of lithium battery and flexible membrane；
2. it is that 70% paraffin (54 DEG C of phase change paraffins) adds and has in the stirred tank of divergent function by mass fraction, is heated to 60 DEG C of insulations；
The most proportionally adding mass fraction is the sodium stearate of 2%, opens stirring 5 minutes, opens dispersion, and rotating speed is 3000 revs/min, disperses 15 minutes；
4. add mass fraction be 28% graphite powder (100 mesh), stir, disperse 30 minutes, measure viscosity be 6000～10000Pa s, can adjust the temperature to viscosity qualified till, be incubated；
5. being injected by the mixture of above-mentioned heat rushes in the flexible membrane die cavity that casing forming is good, cooling；
6., by flexible die along broken line 3 doubling, with heat sealing machine, the first of flexible die the outer edgewise 4 and the second outer edgewise 5 are encapsulated；
7. with vacuum pumping sealing port machine, the 3rd outer edgewise 6 vacuum-pumping and sealing is sealed, make and meet heat-absorbing material；
Above-mentioned use heat sealing machine, vacuum pumping sealing port machine parameter is: heat-sealing head temperature is 180 DEG C～200 DEG C, compressed air 0.3MPa～0.6MPa, and vacuum is-0.09MPa～0.1MPa, and packaging time is 3～5 seconds.
Preferably, the first to the 3rd outer edgewise 4-6 is sheared to 3～5mm, after being turned up along die cavity thickness direction by the first to the 3rd outer edgewise 4-6, is bonded at die cavity lateral wall with the Kapton Tape of 3～5mm.
Embodiment three
1. cut out flexible membrane according to product design shape, with film forming machine by flexible die punch forming such as Fig. 2 shape, standby, the size of die cavity and rush the shell degree of depth and can rush deep adjusting performance according to the overall dimensions of lithium battery and flexible membrane；
2. it is 90%PUPCM(polyurethane block copolymer by mass fraction) (70 DEG C of phase transformations) add in the stirred tank with divergent function, is heated to 80 DEG C of insulations；
The most proportionally adding mass fraction is the magnesium stearate of 1%, opens stirring 5 minutes, opens dispersion, and rotating speed is 3000 revs/min, disperses 15 minutes；
4. add mass fraction be 9% aluminium powder (200 mesh), stir, disperse 30 minutes, measure viscosity be 6000 ~ 10000Pa s, can adjust the temperature to viscosity qualified till, be incubated；
5. being injected by the mixture of above-mentioned heat rushes in the flexible membrane die cavity that casing forming is good, cooling；
6., by flexible die along broken line 3 doubling, with heat sealing machine, the first of flexible die the outer edgewise 4 and the second outer edgewise 5 are encapsulated；
7. with vacuum pumping sealing port machine, the 3rd outer edgewise 6 vacuum-pumping and sealing is sealed, make and meet heat-absorbing material；
Above-mentioned use heat sealing machine, vacuum pumping sealing port machine parameter is: heat-sealing head temperature is 180 DEG C～200 DEG C, compressed air 0.3MPa～0.6MPa, and vacuum is-0.09MPa～0.1MPa, and packaging time is 3～5 seconds.
Preferably, the first to the 3rd outer edgewise 4-6 is sheared to 3～5mm, after being turned up along die cavity thickness direction by the first to the 3rd outer edgewise 4-6, is bonded at die cavity lateral wall with the Kapton Tape of 3～5mm.
Claims (10)
1. the heat sink of a flexible membrane encapsulation, it is characterized in that: include flexible die housing, fill the heat absorption phase transformation mixture being made up of phase transformation material of main part, heat conductive filler and thickening agent being packaged in flexible membrane housing, wherein: phase transformation material of main part 70%～90%(mass), conductive filler material 5%～29%(mass), thickening agent 1%～5%(mass).
The heat sink of flexible membrane the most according to claim 1 encapsulation, it is characterised in that: described phase transformation material of main part is one or more in paraffin, stearic acid-n-butyl alcohol ester, stearic acid-isopropyl alcohol ester, stearic acid-glycerol three ester, polyurethane block copolymer (PUPCM).
The heat sink of flexible membrane the most according to claim 1 encapsulation, it is characterised in that: described conductive filler material is one or more in graphite, aluminium powder, copper powder.
The heat sink of flexible membrane the most according to claim 1 encapsulation, it is characterised in that: described thickening agent is one or more in sodium stearate, magnesium stearate, aluminium distearate.
The heat sink of flexible membrane the most according to claim 1 encapsulation, it is characterised in that: described flexible membrane is polymer encapsulated film, for one or more layers composite membrane.
6. make the method for the heat sink of flexible membrane encapsulation described in claim 1, comprise the following steps:
One) cut out flexible membrane according to product design shape, rush shell on the flexible film with film forming machine and become product design shape, standby；
Two) having in the stirred tank of divergent function by phase transformation material of main part addition band, be heated to uniform temperature according to the phase transition temperature of the phase transformation material of main part selected, proportionally add conductive filler material and thickening agent, dispersed with stirring is uniform；
Three) the finely dispersed mixture being made up of phase transformation material of main part, heat conductive filler and thickening agent is injected while hot rush in the flexible membrane that casing forming is good, cooling；
Four) turnover flexible membrane, seals the part outer edge of the flexible membrane after turnover according to the physical characteristic heat sealing machine of flexible membrane；
Five) with vacuum pumping sealing port machine evacuation and to step 4) in unsealed outer edge seal, prepare flexible membrane encapsulation heat sink.
Flexible membrane the most according to claim 6 encapsulation heat sink manufacture method, it is characterised in that: step 2) described in heating-up temperature be 40 DEG C～80 DEG C.
Flexible membrane the most according to claim 6 encapsulation heat sink manufacture method, it is characterised in that: described step 4) in sealing temperature be 180 DEG C～200 DEG C, sealing pressure be 0.3MPa～0.6MPa, sealing time is 3 seconds～5 seconds.
The heat sink manufacture method of flexible membrane the most according to claim 6 encapsulation, it is characterized in that: described step 5) in sealing temperature be 180 DEG C～200 DEG C, sealing pressure is 0.3MPa～0.6MPa, and sealing time is 3 seconds～5 seconds, and vacuum values is-0.09MPa～-0.1MPa.
The heat sink manufacture method of flexible membrane the most according to claim 6 encapsulation, further comprises the steps of: and flexible membrane seals limit cuts out to 3mm～5mm width, and folded the lateral wall being pasted onto heat-absorbing material housing.
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| CN201510455115.4A CN105895985A (en) | 2015-07-30 | 2015-07-30 | Heat absorption device during package of flexible membrane and fabrication method of heat absorption device |
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| CN201510455115.4A CN105895985A (en) | 2015-07-30 | 2015-07-30 | Heat absorption device during package of flexible membrane and fabrication method of heat absorption device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108598116A (en) * | 2018-04-24 | 2018-09-28 | 昆山国显光电有限公司 | Display panel, display device, display panel motherboard and preparation method thereof |
| CN109659644A (en) * | 2019-01-31 | 2019-04-19 | 广东硅岳能源科技有限公司 | A kind of self radiation type emergency cell group of its composition of phase-change accumulation energy monomer |
| CN113131038A (en) * | 2021-03-30 | 2021-07-16 | 暨南大学 | Battery system and assembly method thereof |
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| CN104716402A (en) * | 2013-12-17 | 2015-06-17 | 北京有色金属研究总院 | Power battery module |
| CN104799612A (en) * | 2015-03-17 | 2015-07-29 | 江苏易舜医疗器械有限公司 | Novel phase-change material mat |
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Patent Citations (5)
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| CN102364747A (en) * | 2011-11-11 | 2012-02-29 | 上海鸣源新能源科技有限公司 | Storage battery temperature management system based on phase change material |
| CN102660231A (en) * | 2012-04-17 | 2012-09-12 | 武汉大学 | Inorganic phase-change material and preparation method thereof |
| CN203721846U (en) * | 2013-12-17 | 2014-07-16 | 北京有色金属研究总院 | Power cell module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108598116A (en) * | 2018-04-24 | 2018-09-28 | 昆山国显光电有限公司 | Display panel, display device, display panel motherboard and preparation method thereof |
| CN109659644A (en) * | 2019-01-31 | 2019-04-19 | 广东硅岳能源科技有限公司 | A kind of self radiation type emergency cell group of its composition of phase-change accumulation energy monomer |
| CN113131038A (en) * | 2021-03-30 | 2021-07-16 | 暨南大学 | Battery system and assembly method thereof |
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Application publication date: 20160824 |