Aluminium heat radiator for PM
Showa Denko K.K. (SDK; TSE:4004) decided to double Oyama Plant's capacity to produce aluminium heat radiators for power
modules (PMs)[1] to be installed in electrified vehicles (xEVs) including battery electric vehicles, hybrid vehicles and
plug-in hybrid vehicles, in order to respond to an increase in demand for aluminium heat radiators for PMs. SDK has
started installation of the additional production line whose start-up of operation is scheduled to be at the beginning
of 2022.
PMs are important parts of xEVs and contribute to the improvement in the performance of xEVs. For example, PMs
contribute to extension of cruising range and improvement in fuel economy of cars. PMs are usually installed into
limited spaces of xEVs. Therefore, heat radiators for PMs must be small, be designed to allow various installation
methods, and have high energy efficiency and large heat dissipation capacity.
Aluminium heat radiators for PMs produced by SDK adopt direct vacuum brazing[2] between insulated substrates and other
parts including aluminium fins produced by SDK. Therefore, SDK's aluminium heat radiators for PMs are small, have large
heat dissipation capacity, and allow free design of coolant pipes, thereby having a multiplicity of uses. SDK started to
produce aluminium heat radiators for PMs in 2019. SDK's aluminium heat radiators are put into PMs by a large PM
manufacturer in Japan, and those PMs are installed in xEVs assembled by various car manufacturers operating in Japan and
other Asian countries.
Backed by the global movement toward realization of carbon neutral society, the automobile industry is accelerating its
shift toward xEVs. Therefore, the market for aluminium heat radiators for PMs is expected to expand further. SDK will
develop and produce smaller high-performance aluminium heat radiators for PMs on the basis of its long-time fostered
aluminium-alloy design technology, aluminium processing technology and power-module evaluation technology, and provide
customers with solutions for their problems, thereby expanding its aluminium specialty components business.
[1] Power module (PM) is a part of electronic device. It consists of several power semiconductor chips, and supplies
electronic power to an electronic device. PM with good efficiency improves xEVs' performance.
[2] Vacuum brazing joints parts without melting basic materials. Vacuum brazing is suitable for jointing of precision
parts because inside of the furnace is vacuum and fine control of inside temperature is possible.