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Thermal Interface Material
Thermal Interface Materials (TIM) remove the excess heat from battery pack cells to improve the functionality of the battery and prolong battery life. Created with application adaptation and the ability to customize, our thermally conductive gap fillers work as a heat sink providing a thermal path for heat to flow away from the battery. With the ability to tailor hardness, surface tack and liner, we have the product range and know-how to create the ideal TIM for your EV battery module.
Thermal pads have different sizes, thicknesses, and qualities. Choose the thermal pad that offers high-quality support and one that will last for years. Higher-priced thermal pads will give you better accuracy and increased speed. Besides, you'll be able to enjoy luxury features and a lovely view. Read customer reviews to get an idea of the product's quality. This way, you'll be able to make the best decision about whether or not a thermal pad is right for your needs.
Another advantage of thermal pads is that they are much easier to install. Thermal paste is a lot more difficult to apply and can result in mistakes and complications. However, thermal paste is much better at conductive heat transfer than thermal pads, so it's a more practical choice for most applications. Thermal paste can dry, however, and is not as mechanically robust as thermal pads. If you're inexperienced or don't want to deal with heat, thermal pads are a better choice.
One of the main advantages of pads is their ease of use. They are easy to install and can be cut or trimmed to fit the specific size and shape of the heat sink or heat source. They also come in a range of thicknesses and hardnesses to suit the application. While thermal pads are very good at transferring heat from the surface of the IC to the heat sink, their solid nature means they cannot spread to fill all the air gaps as thermal paste would do. As a result, we do not recommend thermal pads on critically hot components such as CPUs, GPUs, or Power MOSFETS
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BSP develops and supplies thermal interface materials of various products suitable for customers' needs and wishes. This is largely divided into its form and use, such as Thermal Pad, Thermal Grease and paste, Thermal Putty, Thermal PCM, Thermal Tape and Thermal Film.
Specially Featured Material
for Thermal Propagation
In the unlikely event of EV battery cells igniting, there is a risk that they will burn through the battery cover. For example, the latest safety regulations in China specify that a passenger must have at least five minutes to leave the vehicle in case of a fire emergency. One approach is to cover the battery lid with a layer of a liquid applied fire-resistant material. These are often two-component materials.
Challenges
The material layer must have a defined thickness on the entire surface of the cover. Gaps and overlaps must be within tight tolerance ranges to avoid issues in downstream production processes. Typical spray applications of materials like epoxy have many disadvantages. Material particles in the air are a health risk. Spray applications also require masking, resulting in waste and factory contamination. It needs high investments to protect workers and equipment. The alternative is a flat stream application. The development of safe cells is of utmost importance for a breakthrough in the electrification of transport and stationary storage, because an uncontrollable increase in temperature of the entire system (so-called ‘thermal runaway’) can cause an ignition or even explosion of the battery with simultaneous release of toxic gases. If a single-cell thermal runaway occurs, the next step is to prevent the propagation of the thermal runaway from one cell to the neighbouring cells – known as thermal propagation – or at least extend the time until thermal propagation to five to 10 minutes. This should give the passengers in an electric vehicle enough time to escape or to be rescued by emergency services.
Solutions
Various solutions can be offered to address these challenges. BSP has developed a variety of solutions to provide the right solution for the customer. These solutions can be divided into two main categories. One was the solution between Cell and Cell, and the other was the development of a solution suitable for the substructure of the battery system.
These solutions must meet the following conditions.
Cushion Role for Battery cell expansion Absorption during charging and discharging in Lithum Ion battery
Certain level of Hardness of the surface
Minimization of heat conduction
Minimization of thermal transfer
Minimize temperature transitions from surface to rear side
Maximize temperature difference between surface and rear side