Wevo Silicones Mitigate Thermal Runaway Propagation and Offer More Safety for Lithium-ion Batteries
One of the most important requirements for batteries in electric vehicles is the ability to mitigate thermal runaways. This is defined as protection against overheating through a self-reinforcing, exothermic process and cushioning the effects should this happen nevertheless. Apart from mechanical stability through good vehicle design and cooling management, the thermal stability of the battery is key.
Among the advantages of Wevo silicones are their very high heat and flame resistance
However, the materials used to achieve this should not only prevent the spread of overheating but must simultaneously take account design freedom, weight, and fitness for production processes. To mitigate thermal runaway propagation, WEVO-CHEMIE GmbH has developed a portfolio of silicone-based materials for battery modules and packs that serve as strong thermal, mechanical, and electrical barriers. In addition to very high heat and flame resistance, the tailor-made formulation offers further advantages, for example, the reduced total weight compared with mineral or metal-filled compounds and the avoidance of outgassing in the production process compared with foams.
Although thermal runaway of individual battery cells is rare, once it is set in motion it poses enormous threats, especially in vehicles and storage technologies for private households. This is because the typical failure mode involves violent exothermic decomposition reactions that generate so much heat that it can no longer be dissipated by the thermal management solution of the battery module containing the defective cell. If this effect propagates to other cells, the result could be a fire or even an explosion at the level of the module or pack. Since the thermal runaway of individual cells cannot be completely avoided, the goal here is to create unfavorable conditions for its occurrence, mitigate the ensuing hazards, and contain the effects.
For this purpose, various safety measures must be considered when designing battery modules and packs. These include controlled venting of the individual cells and hence the contained release of the gases produced, as well as the installation of fuse-like mechanisms. In order to prevent the reaction from one defective cell from propagating to neighboring cells and in doing so mitigate the effects of thermal runaway, Wevo has developed special silicone-based materials.
Wevo Solutions Support The Mitigation Of Thermal Runaway
WEVOSIL 27001 FL has been proven in field tests by Wevo customers to be a highly efficient mechanical and thermal barrier that can be applied both above and between cells, depending on the cell type. The material achieves very high heat and flame resistance without any mineral or metallic fillers having to be incorporated. This has helped to keep its specific gravity low, thus also contributing to a lightweight battery design. Its excellent electrical insulation properties play a crucial role in preventing a short circuit in the module’s cell contacting system when applied to critical locations and circuits.
From a mechanical point of view, WEVOSIL 27001 FL is much more flexible than mineral solutions and a lot stronger than foamed materials. In addition, it has a very low volatile content because only state-of-the-art polymers that have been thoroughly degassed during a separate step of their manufacturing process are used in its formulation. This is a clear answer to the outgassing concerns of the automotive industry, raised by older generations of silicone materials. Also, different flow requirements can be met with the lower viscosity WEVOSIL 22027 FL variant, which complements the slightly thixotropic WEVOSIL 27001 FL for coating solutions. Both materials are equally suitable for the production of prefabricated rubber pads and for manual or automated in-situ dispensing.
Silicones From Wevo Enable Efficient Thermal Management Of Batteries
The battery management system can also be employed to mitigate the propagation of thermal runaway, as can a carefully considered design of the thermal management solution for the battery module and pack. The thermally conductive gap fillers in the WEVOSIL 260XX FL series – specially developed for this purpose – also include grades of extra-low density and weight, all of them certified according to the UL 94 V-0 flammability rating. At the same time, high dimensional stability is ensured and there are no curing by-products, due to the use of additional curing chemistry. By default, this enables room temperature curing at the desired speed, meaning that heat curing is not necessary, although heat can greatly accelerate the process if required.
If these tailor-made Wevo solutions are implemented in an early development phase, the overall safety of battery modules can be significantly improved by optimizing thermal management for specific applications and customizing the configuration of thermal, mechanical, and electrical barriers.
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本文由玄子转载自Wevo News，原文标题为:More safety for lithium-ion batteries – with silicones from Wevo，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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定制的硅胶解决方案
Wevo公司提供定制化的硅酮解决方案，包括硅酮、聚氨酯和环氧树脂等，广泛应用于电气和电子领域。这些产品具有高弹性、耐高温、阻燃和良好的电气性能，适用于机械要求高的应用。Wevo的产品包括凝胶、粘合剂、封装材料和热导填料等，满足不同应用的需求。公司提供从产品设计到系列生产的全程支持，并确保产品质量符合国际标准。
WEVO - 硅酮,ENCAPSULANTS,SILICONE,EPOXIES,灌封材料,封装材料,聚氨酯,环氧树脂,GENERAL-PURPOSE ENCAPSULANTS,定制的硅树脂,通用密封剂,黏合剂,导热填隙料,THERMALLY CONDUCTIVE GAP FILLERS,THERMALLY CONDUCTIVE ENCAPSULANTS,TAILORMADE GELS,阻燃的,特制凝胶,TAILOR-MADE SILICONES,GELS,导热密封剂,POTTING MATERIALS,热界面材料,THERMAL INTERFACE MATERIALS,POLYURETHANES,ADHESIVES,透明灌封化合物,凝胶,FLAME RETARDANT,TRANSPARENT POTTING COMPOUNDS,WEVOSIL 28002,WEVOSIL 20201/60,WEVOSIL 20202/60,WEVOSIL 28001,WEVOSIL 26010 FL,WEVOSIL 22007 FL,WEVOSIL 26001 FL,WEVOSIL 22006 FL,WEVOSIL 22005 FL,WEVOSIL 27001 FL,WEVOSIL 22002 FL,WEVOSIL 26020 FL,WEVOSIL 20405,WEVOSIL 22008 FL,20405 FL,WEVOSIL 22102 FL,WEVOSIL 20001,WEVOSIL 22004,WEVOSIL 20200,WEVOSIL 20002,WEVOSIL 27015 FL,光学透明,医学,工业电池,汽车,器具,RESIDENTIAL BATTERIES,MOBILITY,照明,AUTOMOTIVE,FIXTURES,INDUSTRY,住宅电池,CONSUMER,电动汽车电池,高压电池,SECONDARY OPTICS,基础设施,HOMES,ELECTRIC MOTORS,太阳能逆变器,ELECTRIC VEHICLE BATTERIES,LUMINAIRES,保健,LENSES,电气部件,能源,流动性,电子应用,电子元件,BATTERY CELL,INDUSTRIAL BATTERIES,家,MEDICAL,电气应用,ELECTRONIC COMPONENTS,二次光学,电动机,APPLIANCES,AUTOMOTIVE BATTERIES,汽车动力系统,SOLAR POWER INVERTERS,AUTOMOTIVE POWER TRAINS,镜头,LEDS,HEALTHCARE,ENERGY,LIGHTING,INFRASTRUCTURE,消费者,AGRICULTURE,SAFETY,ELECTRICAL COMPONENTS,固定装置,HOME,工业,HEALTH,灯具,ELECTRONIC APPLICATIONS,ELECTRICAL APPLICATIONS,汽车电池,电池单元,发光二极管,安全,农业,HIGH VOLTAGE BATTERIES,健康,家园,OPTICALLY CLEAR
热界面材料电动车用有机硅材料溶液
本文主要介绍了SILCO**THERM**®系列热导材料在电动汽车领域的应用。这些材料旨在提高电子组件的热效散性，延长其使用寿命，并保护其免受环境污染和振动的影响。文章详细阐述了SILCO**THERM**®系列产品的特性，包括粘合剂密封剂、间隙填充剂、封装和灌封化合物、散热膏/化合物等，以及它们在汽车、航空航天和电子行业的应用。此外，还介绍了CHT公司作为硅酮化合物制造商的背景、研发设施和定制服务。
ACC SILICONES
Wevo（威孚）WEVOPUR聚氨酯（PU）产品选型指南
WEVO - 聚氨酯浇铸树脂,POLYURETHANE,POLYURETHANE CASTING RESINS,聚氨酯,300 RE,300 M,9251 FL,390,801 G,PD 52,895,139,PD 445,923 M,552 FL,512 FL,PD 4,3050,385,300,500 MT/40,403 FL/33,600,403,930 M,801,900,507,7210 FL
电子商城
服务
使用FloTHERM和Smart CFD软件，提供前期热仿真模拟、结构设计调整建议、中期样品测试和后期生产供应的一站式服务，热仿真技术团队专业指导。
实验室地址： 深圳 提交需求>
授权代理品牌：集成电路
授权代理品牌：分立元件
授权代理品牌：接插件及结构件
授权代理品牌：部件、组件及配件
授权代理品牌：电源及模块
授权代理品牌：电子材料
授权代理品牌：仪器仪表及测试配组件
授权代理品牌：电工工具及材料
授权代理品牌：机械电子元件
授权代理品牌：加工与定制
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