Focus on Engineering Solutions for Heat Dissipation Materials for Electric Vehicles

Focus on engineering solutions for heat dissipation materials for electric vehicles

AOK established in 2004, started from thermal interface materials (TIMs). With the vigorous development of 5G, IoT and electric vehicles, in order to meet customers strong demand for more overall heat dissipation demand, and then launched a heat dissipation module that can flexibly meet various customized needs, and then further launched a one-stop heat dissipation countermeasure service that combines thermal simulation product consulting services, advanced materials and application engineering, through more comprehensive technologies consultation, specification discussion and product design, and then provide customers with the most suitable thermal engineering solutions.

Over the years, AOK has been designated by more than 4,000 world-renowned customers, including BYD motors, Land Rover motors, Zhonghua motors, Xiaopeng motors, and Great Wall motors. The industry spans server centers, 5G mobile phones, communications, and automotive applications. Electronics, lithium batteries, panels, power supplies, medical and military technology and other fields. In recent years, the vigorous development of electric vehicles has attracted particular attention. Under the leadership of Tesla, traditional automobile manufacturers have also made every effort to develop electric vehicles. It's estimated that between 2025 and 2026, the sales of electric vehicles will exceed that of fuel oil. The "golden cross" of cars. Starting from 2022, the electric vehicle cooling market will grow at a rate of two or three times each year. While major manufacturers are committed to developing more advanced smart electric vehicle systems, heat dissipation has become a top priority in current electric vehicle design. Since the electric vehicle is full of battery packs, on-board smart systems, and various electronic control components that need to be connected to electricity, it will form a phenomenon of electric heat generation, and it's extremely necessary to carry out heat removal engineering, otherwise once the temperature is too high, it will damage the vehicle battery. Groups, electronic components and various intelligent systems have an impact on operation and life.

An EV heat dissipation engineer said that unlike traditional fuel vehicles, the power source of electric vehicles comes from the battery module which is huge and takes up almost half of the space of the entire body and chassis. The battery generates a lot of heat when charging and discharging. Compared with traditional fuel vehicles, which take about 5 to 10 minutes to slowly heat up, electric vehicles only need 1 ~ 3 minutes to generate more than a few hundred watts of heat energy, so how to quickly and effectively manage heat to avoid battery life and the impact of charging and discharging efficiency becomes the key. At present, the key point of the heat dissipation design for electric vehicle battery modules is to transfer the waste heat to the battery module casing through conduction for heat exchange. In practice, the gap between the battery and the battery will be filled with a single-component thermal conductive glue or a double-component thermal conductive sealant, and a low thermal conductivity (about 2.0 ~ 3.0 W/m.k) will be used on the top or bottom of the battery a soft thermal pad guides heat to the case. Because the battery is prone to expand under long-term high temperature, and it will be squeezed to other vehicle components or mechanisms, which will cause the risk of high-speed driving of the car.

In addition to battery modules, electric vehicles also have other heat-dissipating points worthy of attention, including ADAS advanced driver assistance systems/center consoles, automotive multimedia audio-visual navigation systems, driving recorders, voltage converters, and motors. Not only that, the driving computer, car-following radar, cockpit screen in electric vehicles, and even the lidar/camera lens on self-driving cars are all heat sources, and they are also links that need attention in heat dissipation engineering design. Nowadays, the built-in functions of the ADAS central control system are more and more diverse, so a lot of waste heat will be generated during operation, among which the heat dissipation of the electronic control unit (ECU) is the most important. At present, the mainstream heat dissipation solution is to use small-sized thermal pads of different thicknesses (thermal conductivity is about 4.0 to 6.0 W/mk) that can cope with the heat dissipation of many small-sized chips on the substrate, and then conduct the waste heat to the large-area aluminum extrusion on the heat sink. As for the heat treatment of the car multimedia audio-visual navigation system, the focus is on the image processing chip, which requires the use of high thermal conductivity thermal pads to transfer the waste heat to the heat sink. In order to avoid excessive concentration of waste heat, heat pipes can also be used to disperse the waste heat. At present, for driving recorders with limited space, in addition to using low-volatility or non-silicon thermal pads for the camera lens, ceramic heat sinks with thermally conductive double-sided tape, opening holes in the shell, or installing small fans are common.

AOK, which started out as a thermal interface material, has been committed to product design, development and mass production that can meet the customized needs of customers for many years. For now the main products are thermally conductive pad, thermally conductive gel, thermal grease, phase change thermal grease, phase change thermal interface materials, thermally conductive tape, foam silicone sheet, thermal silicone adhesive, thermal insulation materials. The company has a high-performance thermal interface material with an industry-leading thermal conductivity of 12 W/m.k, which enables AOK to be on a par with other thermal conductive material suppliers in the market.

In the past, individual heat dissipation components and mechanisms could only deal with a single point of waste heat. In the face of electric vehicles with multiple hot spots, it's necessary to conduct an overall heat dissipation assessment and analysis in advance to achieve systematic heat dissipation. In response to such demands, AOK specially introduces heat flow simulation software, electronic heat dissipation analysis software and unique grid technology that are suitable for thermal management simulation analysis and planning in all product development, and then creates the most comprehensive system that can assist customers from the initial stage of product development. One-stop heat dissipation countermeasure service for heat dissipation design. Combining the research and development strength of thermal interface materials of the advanced materials department, the most unparalleled flexible heat dissipation module of the application engineering department, the one-stop heat dissipation countermeasure service backed by the heat flow simulation software, and the advantages of 18 years of accumulated industrial experience, AOK can thus provide each customer provides the most suitable and mass-producible thermal engineering solution at the moment, and then joins hands with customers and partners to create a "green living space" that is smart, high-quality, efficient, and zero-carbon.

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Updated on:2023-07-10 10:14:36