search.noResults

search.searching

dataCollection.invalidEmail
note.createNoteMessage

search.noResults

search.searching

orderForm.title

orderForm.productCode
orderForm.description
orderForm.quantity
orderForm.itemPrice
orderForm.price
orderForm.totalPrice
orderForm.deliveryDetails.billingAddress
orderForm.deliveryDetails.deliveryAddress
orderForm.noItems
Advertorials


Next-gen thermal management Thermal Interface Material for Batteries in the field of electric cars


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.


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.


Telephone: 01858 431133 Email: enquiries@tiltd.eu Web: www.tiltd.eu


www.cieonline.co.uk


Components in Electronics


July/August 2020 49


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58