Diamond Heat Sink - A New Tool for Thermal Management of Electric Vehicle Batteries

From the large-scale promotion of electric vehicles to the rapid progress of intelligent driving technology, every leap in automotive technology cannot be separated from the promotion of advanced materials. Among many materials, diamond heat sink, as a kind of highly efficient thermal conductive material, is gradually occupying an important position in the automotive industry. Its wide application not only plays a key role in enhancing the performance of vehicles, but also effectively extends the service life of components and significantly enhances the safety of the entire vehicle.

The design of power semiconductors is mainly driven by two factors: thermal conductivity (cooling paths) and electrical conductivity (paths carrying large currents). In the electronic systems of new energy vehicles, the efficiency of power conversion and battery technology is directly related to the performance and range of the vehicle. As new energy vehicles gradually move towards high range targets, the heat generated by power batteries increases, making efficient thermal management particularly important.

Although electrical paths have been researched for many years and some results have been achieved, thermal paths are still a major challenge. Diamond is an ideal material for heat dissipation due to its extremely high thermal conductivity and thermal stability. Its thermal conductivity can reach 2000 W/m-K, which is five times that of copper and ten times that of aluminum. This means that diamond heat sinks are able to dissipate heat efficiently and protect the battery and other critical components from high temperatures, thus enhancing the overall performance and range of the vehicle.

Diamond materials are a new tool for battery management in electric vehicles. Electric vehicle battery packs generate a lot of heat during the charging and discharging process. If the heat is not dissipated in a timely and effective manner, the high temperature will lead to a decline in battery performance, shorten its life, and even lead to potential safety hazards. Diamond heat sinks have become an ideal heat dissipation solution for battery management systems due to their extremely high thermal conductivity and excellent thermal stability.

In electric vehicle battery management systems, diamond heat sinks can quickly transfer the heat generated by the battery to a cooling system, such as a radiator or liquid cooling system, to keep the battery temperature within a safe range. Compared to traditional copper or aluminum materials, diamond heat sinks are able to export heat faster and more efficiently, reducing the risk of localized overheating and ensuring that the battery remains stable under high power and extended operation.

In addition, diamond material not only has excellent thermal conductivity, but also has excellent thermal stability and corrosion resistance, which enables it to maintain its efficient heat dissipation ability in long-term use, reducing problems caused by material aging or thermal failure. Electric vehicle batteries are often required to operate under harsh operating conditions. By optimizing thermal management, Diamond Heat Sink not only improves the safety and reliability of the battery, but also effectively extends the service life of the battery pack.

2023 A French company has announced a new miniaturized design for EV inverters that improves EV efficiency by combining diamond wafers with proven silicon carbide chips.

CSMH uses the MPCVD method to prepare large-sized and high-quality diamonds, and currently has mature products such as diamond heat sinks, diamond wafers, diamond windows, diamond hetero junction integrated composite substrates, etc. Among them, the thermal conductivity of diamond heat sinks is 1000-2200W/(m.k), and the surface roughness of diamond wafer Ra<1nm. lt has been applied in aerospace, high-power semiconductor lasers, optical communication, chip heat dissipation, nuclear fusion and other fields.