CN106356588A - Preparation method of thermally conductive silica gel composite phase change material for battery thermal management system - Google Patents

Preparation method of thermally conductive silica gel composite phase change material for battery thermal management system Download PDF

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Publication number
CN106356588A
CN106356588A CN201510414903.9A CN201510414903A CN106356588A CN 106356588 A CN106356588 A CN 106356588A CN 201510414903 A CN201510414903 A CN 201510414903A CN 106356588 A CN106356588 A CN 106356588A
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change material
silica gel
composite phase
conductive silica
preparation
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CN106356588B (en
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阳楚雄
张国庆
高冠勇
王少辉
王子缘
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Guangdong Wan Jin Science And Technology Co Ltd
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Guangdong Wan Jin Science And Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02Materials undergoing a change of physical state when used
    • C09K5/06Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
    • C09K5/063Materials absorbing or liberating heat during crystallisation; Heat storage materials
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/08Materials not undergoing a change of physical state when used
    • C09K5/14Solid materials, e.g. powdery or granular

Abstract

The invention discloses a preparation method of a thermally conductive silica gel composite phase change material for a battery thermal management system. The thermally conductive silica gel composite phase change material is characterized by being a composite material of thermally conductive silica gel and a composite phase change material; the mass fraction of the thermally conductive silica gel is 50%-80%; the mass fraction of the composite phase change material is 20%-50%; the phase change temperature of the composite phase change material is 35-55 DEG C. After the composite material provided by the invention is applied to a battery pack developed by the battery thermal management system, the advantages of simple structure, firm connection, waterproof, dustproof and shockproof performance and the like as well as heat-dissipating and temperature-equalizing functions of batteries are achieved, effective thermal management is performed on heat generation of the batteries and connecting sheets, and thus the batteries are controlled to work in the optimal working temperature range.

Description

A kind of battery thermal management system preparation method of heat conductive silica gel composite phase-change material
Technical field
The present invention relates to a kind of battery thermal management system preparation method of heat conductive silica gel composite phase-change material, especially a kind of heat conductive silica gel composite phase-change material is applied to battery thermal management system, belongs to battery thermal management technical field.
Background technology
With electrokinetic cell the industries such as electric automobile, communication system, robot fast development, the performance such as the safety of electrokinetic cell, reliability, life-span is more and more aobvious in product development with application to be paid attention to.Heat production characteristic due to battery, power battery at high temperature and temperature discordance can be caused, the high temperature of wherein battery, often affect the generation of internal cell material irreversible reaction, cause battery performance sharp-decay, it is in particular up to the high temperature of certain limit, burning, blast of battery etc. can be caused to endanger;Wherein battery temperature discordance, easily causing the long-term too early inefficacy of high-temperature battery in set of cells, thus affecting the decline of set of cells whole volume or voltage, leading to the premature failure of set of cells.
Along with the development of electrokinetic cell, battery thermal management system derives on the basis of battery management system, and battery thermal management system lays particular emphasis on passive heat radiation to each battery of set of cells, heating and supervisory function bit.Advanced battery thermal management system becomes electric automobile, the main marketing methods of electrokinetic cell and profit point.
Traditional battery thermal management system includes air cooling system, liquid-cooling system, semiconductor refrigeration system, and wherein air cooling system effect is poor, and set of cells can not meet the test of ip67 water proof and dust proof;Liquid-cooling system systematic comparison is complicated, there is the danger of liquid leakage;Semiconductor refrigeration system needs extra energy supplying system.
In sum, based on power battery pack opposite heat tube reason system and dust-proof demand of paddling, the present invention proposes the integral heat sink based on set of cells, a kind of preparation method of heat conductive silica gel composite phase-change material that totally enclosed type designs and develops, it is applied to the set of cells of battery thermal management system exploitation using the composite of the present invention, not only there is structure simple, stable connection, water proof and dust proof, shockproof the advantages of, also there is the radiating of battery and equal temperature function simultaneously, fully the heat production to battery and connection sheet carries out effective heat management, battery is controlled to work in optimal operating temperature range.
Content of the invention
It is an object of the invention to power battery pack opposite heat tube reason system and dust-proof demand of paddling, a kind of preparation method of battery thermal management system heat conductive silica gel composite phase-change material is proposed.
Battery thermal management system heat conductive silica gel composite phase-change material is it is characterised in that be the composite of heat conductive silica gel and composite phase-change material.Wherein, described heat conductive silica gel mass fraction accounts for 50% ~ 80%;Described composite phase-change material mass fraction accounts for 20% ~ 50%;The phase transition temperature of described composite phase-change material is 35 DEG C ~ 55 DEG C.Preparation process is as follows.
The preparation of step (1) heat conductive silica gel.
Using market common bi-component organic silicon potting adhesive, component a, component b are added a certain amount of micro-nano thermal conducting agent, stabilizer, delayed-action activator respectively, after mix homogeneously, be prepared into component a1, component b1 respectively.When being used alone, component a1, component b1 are mixed according to 1:1 ratio, add a small amount of catalyst, mix homogeneously, vacuumizing and exhausting steeps, curing molding.
The preparation of step (2) composite phase-change material.
Phase-change material is combined by a certain percentage with thermal conducting agent, fire retardant, and carries out micro-nanoization process, prepare micro-nano composite phase-change material.
The preparation of step (3) heat conductive silica gel composite phase-change material.
Component a1 prepared step (1) first, component b1 are according to 1:1 ratio mix homogeneously;Then the micro-nano composite phase-change material of preparation in a certain amount of step (2), mix homogeneously are added;Finally add a small amount of catalyst, mix homogeneously, vacuumizing and exhausting steeps, curing molding.
Thermal conducting agent described in step (1) is aluminium oxide, magnesium oxide is it is impossible to be metal dust or metal nitride.
Micro-nano composite phase-change material described in step (2), wherein phase-change material mass fraction accounts for 60% ~ 100%;Thermal conducting agent mass fraction accounts for 0 ~ 20%;Fire retardant mass fraction accounts for 0% ~ 20%.
Phase-change material described in step (2) is paraffin, and phase transition temperature is 35 DEG C ~ 55 DEG C;Thermal conducting agent is expanded graphite;Fire retardant is antimony oxide, magnesium hydroxide, in aluminium hydroxide one or more it is impossible to be containing n, s, p based flame retardant.
Catalyst described in step (1) and (3) is platinum catalyst.
It is applied to the set of cells of battery thermal management system exploitation using the composite of the present invention, including battery case, heat conduction silicone, heat conductive silica gel composite phase-change material layer, battery, connection sheet.
The feature that set of cells possesses: two-layer heat conduction silicone and heat conductive silica gel composite phase-change material layer sandwich structure consisting;The connection sheet of heat conduction silicone sealed cell, bonding with the top and bottom of battery case, there is radiating, heat transmission function;Heat conductive silica gel composite phase-change material layer is laminboard layer, and sealed cell is bonding with the four sides of battery case, has heat accumulation, radiating, heat transmission function.
The function that set of cells possesses: have that structure is simple, stable connection;Water proof and dust proof, shockproof the advantages of;There is the radiating of battery and equal temperature function.
Brief description
Fig. 1 adopts the set of cells overall diagram of present invention design.
Fig. 2 adopts the set of cells exploded view of present invention design.
In figure label: 1- battery case, 2- heat conduction silicone, 3- heat conductive silica gel composite phase-change material layer, 4- battery, 5- connection sheet.
Specific embodiment
Below in conjunction with the accompanying drawings embodiments of the present invention are specifically described.
It is applied to the set of cells of battery thermal management system exploitation using the composite of the present invention, including battery case 1, heat conduction silicone 2, heat conductive silica gel composite phase-change material layer 3, battery 4, connection sheet 5.Wherein heat conduction silicone 2 has upper and lower two-layer, fully seals the connection sheet 5 of battery, bonding with the top and bottom of battery case 1 respectively, and thickness is 0.2cm ~ 1cm, the carrying out of connection sheet heat production is radiated, heat transfer effect;Heat conductive silica gel composite phase-change material layer 3 is laminboard layer, fully seals battery 4, bonding with the peripheric surface of battery case 1, and thickness is 4cm ~ 6cm, carries out heat accumulation, radiating, heat transfer effect to battery heat production;Heat conduction silicone and heat conductive silica gel composite phase-change material layer sandwich structure consisting.
In the present embodiment, first battery 4 is welded using connection sheet 5, is placed in battery case 1;Then modulate heat-conducting organic silica gel, vacuumizing and exhausting steeps, it is ensured that heat-conducting organic silica gel covers the link plate 5 of battery bottom, curing molding in injection Battery case;Subsequently configuration heat conductive silica gel composite phase-change material liquid, vacuumizing and exhausting steeps, it is ensured that heat conductive silica gel composite phase-change material liquid covers battery 4, curing molding in injection Battery case;Finally, it is ensured that heat-conducting organic silica gel covers the link plate 5 on battery top, curing molding, by the upper cover seal of battery case 1 for injection organic silica gel.
In the present embodiment, heat conduction silicone, by using market common bi-component organic silica gel, adds a certain amount of micro-nano thermal conducting agent, stabilizer, delayed-action activator in component a, component b respectively, is prepared into component a1, component b1 after mix homogeneously respectively.During use, component a1, component b1 are mixed according to 1:1 ratio, add a small amount of platinum catalyst, mix homogeneously, vacuumizing and exhausting steeps, prepared by curing molding.
In above-mentioned heat conduction silicone, thermal conducting agent used is aluminium oxide, magnesium oxide.
In the present embodiment, heat conductive silica gel composite phase-change material layer is by component a1 in above-mentioned heat conductive silica gel preparation process, component b1 according to 1:1 ratio mix homogeneously;Then a certain amount of micro-nano composite phase-change material, mix homogeneously are added;Finally add a small amount of catalyst, mix homogeneously, vacuumizing and exhausting steeps, prepared by curing molding.
Above-mentioned heat conductive silica gel composite phase-change material layer, wherein heat conductive silica gel mass fraction account for 50% ~ 80%, and composite phase-change material mass fraction accounts for 20% ~ 50%, and the phase transition temperature of composite phase-change material is 35 DEG C ~ 55 DEG C.
Above-mentioned composite phase-change material is combined with thermal conducting agent, fire retardant by a certain percentage by phase-change material, and carries out micro-nanoization process and prepare.
Above-mentioned composite phase-change material, wherein phase-change material mass fraction accounts for 60% ~ 100%;Thermal conducting agent mass fraction accounts for 0% ~ 20%;Fire retardant mass fraction accounts for 0% ~ 20%.
Above-mentioned phase-change material is paraffin, and phase transition temperature is 35 DEG C ~ 55 DEG C;Thermal conducting agent is expanded graphite;Fire retardant is antimony oxide, magnesium hydroxide, in aluminium hydroxide one or more it is impossible to be containing n, s, p based flame retardant.
Above-described embodiment is the present invention preferably embodiment; but embodiments of the present invention are simultaneously not restricted to the described embodiments; as adjusted the formula proportion of material; change wherein shape of the position of part, quantity or change housing etc.; other any spirit without departing from the present invention and the change made under principle, modification, replacement, combine, simplify; all should be equivalent substitute mode and technical scheme, be included within protection scope of the present invention.

Claims (5)

1. a kind of battery thermal management system with the preparation method of heat conductive silica gel composite phase-change material it is characterised in that the composite of heat conductive silica gel and composite phase-change material;Wherein, described heat conductive silica gel mass fraction accounts for 50% ~ 80%;Described composite phase-change material mass fraction accounts for 20% ~ 50%;The phase transition temperature of described composite phase-change material is 35 DEG C ~ 55 DEG C;Preparation process is as follows:
(1) preparation of heat conductive silica gel
Using market common bi-component organic silicon potting adhesive, component a, component b are added a certain amount of micro-nano thermal conducting agent, stabilizer, delayed-action activator respectively, after mix homogeneously, be prepared into component a1, component b1 respectively;
When being used alone, component a1, component b1 are mixed according to 1:1 ratio, add a small amount of catalyst, mix homogeneously, vacuumizing and exhausting steeps, curing molding;
(2) preparation of composite phase-change material
Phase-change material is combined by a certain percentage with thermal conducting agent, fire retardant, and carries out micro-nanoization process, prepare micro-nano composite phase-change material;
(3) preparation of heat conductive silica gel composite phase-change material
Component a1 prepared step (1) first, component b1 are according to 1:1 ratio mix homogeneously;Then the micro-nano composite phase-change material of preparation in a certain amount of step (2), mix homogeneously are added;Finally add a small amount of catalyst, mix homogeneously, vacuumizing and exhausting steeps, curing molding.
2. according to claim 1 a kind of preparation method of battery thermal management system heat conductive silica gel composite phase-change material it is characterised in that the thermal conducting agent described in step (1) be aluminium oxide, magnesium oxide.
3. according to claim 1 a kind of battery thermal management system with the preparation method of heat conductive silica gel composite phase-change material it is characterised in that the micro-nano composite phase-change material described in step (2), wherein phase-change material mass fraction accounts for 60% ~ 100%;Thermal conducting agent mass fraction accounts for 0% ~ 20%;Fire retardant mass fraction accounts for 0% ~ 20%.
4. according to claim 1 or 3 a kind of preparation method of battery thermal management system heat conductive silica gel composite phase-change material it is characterised in that described phase-change material is paraffin, phase transition temperature be 35 DEG C ~ 55 DEG C;Thermal conducting agent is expanded graphite;Fire retardant is antimony oxide, magnesium hydroxide, in aluminium hydroxide one or more.
5. according to claim 1 a kind of preparation method of battery thermal management system heat conductive silica gel composite phase-change material it is characterised in that catalyst described in step (1) and (3) be platinum catalyst.
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Cited By (9)

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CN107994297A (en) * 2017-12-13 2018-05-04 深圳市海梁科技有限公司 A kind of intelligent heat dissipation material, battery radiating explosion-proof device and preparation method thereof
DE102017206560A1 (en) * 2017-04-19 2018-10-25 Robert Bosch Gmbh Battery module and use of a propagation protection element
CN108822414A (en) * 2018-05-29 2018-11-16 宁波聚特普新材料有限公司 A kind of lithium ion battery heat conductive rubber material and preparation method
CN109722215A (en) * 2017-10-27 2019-05-07 宁德时代新能源科技股份有限公司 A kind of heat absorption casting glue and its battery
CN109786613A (en) * 2019-02-28 2019-05-21 中国电力科学研究院有限公司 A kind of battery case preventing thermal runaway
CN110317578A (en) * 2019-07-03 2019-10-11 张立强 Phase-change thermal storage silica gel, preparation method and applications
CN111286307A (en) * 2020-03-06 2020-06-16 平湖阿莱德实业有限公司 Curable two-component heat-conducting heat-storing silicone gel
CN111725443A (en) * 2020-07-01 2020-09-29 广东工业大学 Preparation method of silica gel composite material and battery thermal management system
CN112078833A (en) * 2020-07-27 2020-12-15 上海空间电源研究所 Method for controlling temperature rise of high-power lithium battery for carrier rocket

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CN103374333A (en) * 2012-04-13 2013-10-30 南京德朔实业有限公司 Composite phase change material
CN103756327A (en) * 2013-11-07 2014-04-30 杭州硅畅科技有限公司 Heat-conducting silicone rubber electronic casting glue and preparation method and application thereof
CN104059611A (en) * 2013-03-19 2014-09-24 张曹 Phase-change material packaging process and phase change heat storage product

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CN103374333A (en) * 2012-04-13 2013-10-30 南京德朔实业有限公司 Composite phase change material
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Cited By (13)

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DE102017206560A1 (en) * 2017-04-19 2018-10-25 Robert Bosch Gmbh Battery module and use of a propagation protection element
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CN109722215A (en) * 2017-10-27 2019-05-07 宁德时代新能源科技股份有限公司 A kind of heat absorption casting glue and its battery
CN107994297A (en) * 2017-12-13 2018-05-04 深圳市海梁科技有限公司 A kind of intelligent heat dissipation material, battery radiating explosion-proof device and preparation method thereof
CN107994297B (en) * 2017-12-13 2020-07-31 深圳市海梁科技有限公司 Intelligent heat dissipation material, battery heat dissipation explosion-proof device and manufacturing method thereof
CN108822414A (en) * 2018-05-29 2018-11-16 宁波聚特普新材料有限公司 A kind of lithium ion battery heat conductive rubber material and preparation method
CN108822414B (en) * 2018-05-29 2021-01-15 零维(宁波)科技发展有限公司 Heat-conducting rubber material for lithium ion battery and preparation method thereof
CN109786613A (en) * 2019-02-28 2019-05-21 中国电力科学研究院有限公司 A kind of battery case preventing thermal runaway
WO2021000439A1 (en) * 2019-07-03 2021-01-07 张立强 Phase-change heat storage silica gel, preparation method therefor, and application thereof
CN110317578A (en) * 2019-07-03 2019-10-11 张立强 Phase-change thermal storage silica gel, preparation method and applications
CN111286307A (en) * 2020-03-06 2020-06-16 平湖阿莱德实业有限公司 Curable two-component heat-conducting heat-storing silicone gel
CN111725443A (en) * 2020-07-01 2020-09-29 广东工业大学 Preparation method of silica gel composite material and battery thermal management system
CN112078833A (en) * 2020-07-27 2020-12-15 上海空间电源研究所 Method for controlling temperature rise of high-power lithium battery for carrier rocket

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