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Back to Basics in today’s Challenging Marketplace The switch to electric drive systems and the increasing variety of sensors and
electronics imply completely new challenges for the automotive sector. Besides the field of electric powertrain, the battery is one of the most critical parts of the EV or PHEV. A perfect temperature control is crucial and therefore, the selection and integration of thermal interface materials is mandatory. Of course, there are many different types of battery cells, modules, manufacturers and requirements on the market, which vary widely. That in turn leads to a lot of different thermal management solutions that can be applicated. A common solution can be, to transfer the heat of the cells to the bottom of the module and to connect these cells with a Gap Pad, which is compensating any kind of mechanical tolerances. The heat transfer from the cells to the bottom can be realized by a thermal tape, that combines a good thermal conductive with high electrical isolation. Furthermore, a thermal connection to the side of the module by a Gap Pad can be useful, to ensure a perfect cooling of the whole module. In view of these requirements, Kerafol offers a wide range of different Thermal Interface Materials. For the Gap Pads, the focus is on thermal performance, softness and mechanical stability. It is important to know, that the thermal performance of the whole application is not only depending on the thermal conductivity of the pads, it is about the total thermal resistance of the construction. Besides the thermal resistance of the pad, there is always a thermal resistance between pad and heat source and heat sink. So it depends on the ability of the material, to get a smooth levelling and perfect contact to the surface. Of course the selection of the right pad depends on the application, but a very common solution can be the 86/225 or the 86/325, both based on silicone for the highest level of flexibility.
Piezoceramic materials are commonly used in actuation and sensing applications across a variety of markets and are key to some of the leading-edge
technologies now used in the medical sector. From laboratory diagnostics and microdosing to ultrasonics and even tartar removal from teeth, medical technologies require components that are fast, reliable and energy saving.
Piezoceramics combine these characteristics, giving much higher accuracy and precision – and requiring less power – compared to traditional mechanical actuators and sensors, and are friction free, so are less susceptible to wear and tear, keeping costs down to a minimum. They do not create and are not affected by magnetic fields, and work reliably under extreme conditions, for example under cryogenic temperatures and in vacuums, making them easily adaptable to different environments for such diverse functions as non-destructive testing, therapy and imaging.
For the thermal tape between the cells, the 86/60 can be a very good match, as this material combines a high thermal conductivity of 4,5 W/mK with an electrical isolation of 5 kV by a thickness of 0,25 mm.
The long-term behaviour of all components in that kind of application, that applies also for of the thermal interface materials, is crucial. Tests like maximum temperature, temperature cycles, humidity in combination with temperature or of course vibration tests can give a first indication to the behaviour and quality of the material. Therefore, Kerafol can look back on more than 20 years experience of R&D, testing and producing of thermal interface materials. Whether battery, or electric powertrain - The German technology TIMs of KERAFOL are already an approved solution for a wide range of automotive applications. This is enhanced with rapid turnaround and development support from UK based Thermal Issues, supplying TIM’s, electrical isolation, RFI and IP rated gasket options.
Many of the medical applications for piezoceramics deal with controlled flow of liquids in micropipetting applications, taking advantage of the incredible speed and accuracy that they offer down to the micrometre level. Devices are getting more compact as we try to cram more capabilities into the same lab spaces, while the density of sampling is getting higher, creating a need for very small and fast drives for the pipetting process. At the same time, these mechanisms must produce enough force to move the pipettes vertically, but with the accuracy to aspirate or dispense the right amounts. Piezomotors are perfect for this application, as they operate with a tiny footprint as a direct linear drive and can generate high forces. A ceramic that oscillates at ultrasonic frequencies generates a controllable forward motion with uniform speed and unparalleled accuracy. Similarly, piezo
elements in micropumps control and monitor extremely small liquid or gas volumes reliably and precisely in the range of a few hundred millilitres to a few nanolitres. Different types of pumps, such as
membrane or peristaltic hose pumps, are actuated by different drive principles. The piezo elements can be adapted perfectly to each specific application environment, for example miniaturised lab-on-a-chip solutions for mobile analytical
instruments, or microdiaphragm pumps that require compact drives to create continuous and variable flow rates to even the picolitre range. Essentially, any application that needs reliable metering of minute amounts of liquids and gases – from medical uses and biotechnology to chemical analytics and process engineering – can benefit from powerful and versatile piezo technology, and the more it is applied to this sector, the more device manufacturers will realise its potential.
Telephone: 01858 431133 Email:
enquiries@tiltd.eu Web:
www.tiltd.eu
www.cieonline.co.uk www.cieonline.co.uk To find out more, go to
http://bit.ly/PIC-Med-Tech
To help win new business in today’s very challenging, re-emerging marketplace, BEC Distribution has announced the availability of new ranges of basic circuit components which combine cost-effectiveness with high quality and short lead times.
The initial product ranges include RJ45 Ethernet connectors, PCB blocks and 1000Base-T magnetics. More ranges will follow. Sourced from many established manufacturers around the globe, the components offer high-quality, very cost-effective alternatives to market- leading brands, often at less than half the price. Quality has not been sacrificed. Quite the reverse in fact - for example,
error-reduction designs have been utilised in the components. Many products feature gold-plated contacts and robust, rugged designs, ensuring long life. The products cover RJ45 Ethernet connector terminal blocks, 2-4 ports; PCB terminal blocks, sockets and plugs; and 1000Base-T Magnetics Modules supporting 1:1 Turns Ratio Transceivers, IEEE802.3 Compliant. From a commercial perspective, short delivery times of 2-3 weeks are offered, with many products ex-stock. Low MOQs of just 10 pcs are also offered on many products. The policy of sourcing from many different countries around the world ensures continuity of supply without compromising quality.
BEC is also a franchised distributor of resistors, inductors, coils, chokes, power supplies, LAN Magnetics and Transforms.
www.bec.co.uk Tel: +44(0)1844 275824
IPS TFTs in stock at Plus Opto Ansmann UK LTD
Great Image Quality and Wide Viewing Angle in Industrial displays Plus Opto offers the full range of IPS displays from Winstar Display Co Ltd. In Plane Switching offers improved colour depth and wider view angle as well as better contrast and better visibility under direct sunlight or bright lights compared to traditional STN displays. Sizes range from 0.96” to 12.3”
offering superior performance for hand-held and static applications. Wide temperature range (-20+70°C) is standard, with some modules operating from -30 to up to +85°C.
A range of interface options includes MIPI DSI, LVDS and RGB. Higher brightness (up to 1100 cd/m2) is available on some modules for outdoor viewing. Resistive or capacitive touchscreen (PCAP) is an option for some models, and there is a possibility to customise with a custom cover lens.
For more information and to view the full Winstar range visit
www.plusopto.co.uk, email
sales@plusopto.co.uk or follow us on twitter.
ANSMANN manufacture all types of rechargeable and primary cell battery packs (NiMH, Lithium and Alkaline) both in hard and soft cases, designed and produced according to customer specifications. ANSMANN also offer a wide range of standard battery chargers and power supplies or bespoke designs to suit your application; with sales and technical support, quality control and warehousing in the UK. ANSMANN UK LTD 0870 609 2299
www.ansmann.co.uk
Components in Electronics Components in Electronics December/January 2021 45 May 2021 43
Piezoceramics provide precision and reliability to medical technologies
Back to Basics in today’s Challenging Marketplace
Advertorials
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