Regarding the sealing of the battery module, we can see in Fig. 1~3 that the material we chose for the sealing of the battery casing in electric vehicles is silicon foam. Our silicon foam products have leading advantages over traditional foam: low density, sound insulation, vibration damping, thermal insulation and other properties, with high flame retardancy, aging resistance, super waterproof, super dustproof, lightweight, insulation, high and low temperature resistance, etc., the service life of the traditional foam material is 3-5 times, in terms of comfort, foam density and environmental protection is also significantly better than the traditional foam material.
Next look at Figure 4, Which is the Pouch Cell Battery Packs cooling fins. For soft pack batteries, cooling pads are needed between the individual cells. The first option is to use mica sheet (mica paper, mica tape); the second option is to use silicone foam gasket; the third and the most primitive option is to use PU+PET. each of these three options has its own advantages: the first option is to use the mica sheet, which has excellent anti-high-pressure and high-temperature resistance.
The first option is to use the mica sheet, which has excellent anti-high-pressure and high-temperature resistance. For example, mica sheets as thin as 0.3mm can endure temperatures up to 1300°C for 20 minutes without burning through, while 0.5mm-thick sheets can maintain their integrity for half an hour. This exceptional heat resistance provides crucial time for passengers to evacuate during fire incidents or accidents, ensuring their safety.
The second option is to use silicon foam, his performance in flame retardant and insulation is no less than the above-mentioned mica sheet, and he has the inherent advantages: vibration damping, anti-high voltage, and can maximize the protection of the independent space of each battery.
The last program is the most traditional PU + PET, he has the fire insulation effect are not as good as the previous two programs, now this program has slowly begun to fade out of the public's choice. The good thing is that his biggest advantage is cheap, but as the most critical battery part of new energy vehicles, we recommend using a higher performance program to ensure optimal safety and battery life.
Next you will see Figure 5, which is The Prismatic Cell Battery Packs cooling fins.As you know, most of the new energy vehicles in China now have battery solutions that are chosen to Prismatic Battery Pack.It can be said that our prismatic battery packaging solution is far ahead in the world.
FuQiang (FQ) has four new solutions for prismatic battery packs: MPP (Microcellular Polypropylene foam), Silicone Rubber,Ceramic Silicone Rubber and Aerogel pad.
MPP:The high temperature resistance of MPP foam exceeds that of other foams, ensuring stability and performance under harsh thermal conditions. The micron-sized cell gives it excellent insulating properties, which effectively reduces heat transfer and improves the overall performance of the battery. During the charging and discharging process, the batteries of new energy vehicles will rapidly exothermize and contract and expand, and MPP is able to isolate the temperature conduction between the battery components. At the same time, MPP has sufficient pressure resistance and shock absorption buffer performance, which can maximize the prevention of battery deformation and expansion and bulging, and improve the service life and safety of the battery.
Silicone Rubber:Silicone rubber sheeting is a type of elastomer, or synthetic rubber, that has a unique molecular structure that gives it superior mechanical and thermal properties. Some of the key properties of silicone rubber sheeting are as follow.insulation: Silicone rubber sheeting has a low thermal conductivity, which means it can prevent heat transfer between different parts of the battery. retardancy: Silicone rubber sheeting has a high ignition temperature and low flammability, which means it can resist combustion and self-extinguish in case of fire.resistance: Silicone rubber sheeting has a high resistance to various chemicals, such as acids, bases, solvents, oils, and electrolytes, that can be present in the battery environment. durability: Silicone rubber sheeting has a high tensile strength and a high elongation at break.sustainability: Silicone rubber sheeting is a recyclable and biodegradable material that can reduce the environmental impact of EV batteries. Silicone rubber sheeting can be easily separated from other materials and reused or disposed of in an eco-friendly way.
Ceramic Silicone Rubber:It contains all the excellent characteristics of the silicone rubber mentioned above, and his biggest feature is that in the case of flame burning, he himself will be ceramic, into a ceramic can ensure that at high temperatures need to spend more time before it is possible to burn through the layer of ceramics, which can maximize the time for passengers to escape to the rescue time for the car to save time.
Aerogel pad: Aerogel felt is a type of thermal barrier that can prevent or delay thermal runaway propagation in EV battery packs. It is made of silica aerogel particles that are bonded together by ceramic fibers to form a flexible and porous blanket. Aerogel felt has several advantages over conventional materials, such as: Low thermal conductivity: Aerogel felt has extremely low thermal conductivity, which means it can effectively block heat transfer and prevent thermal runaway propagation. Aerogel felt can also withstand high temperatures without losing its insulation performance. Ultra-thin forms: Aerogel felt can be manufactured into thin and lightweight products that can fit into tight spaces and reduce the overall weight of the battery pack. Aerogel felt can also accommodate different cell shapes and sizes, such as pouch or prismatic cells. Compression response: Aerogel felt can provide both thermal protection and mechanical support to the cells. Aerogel felt can also adapt to cell breathing and swelling during the battery lifecycle without compromising its thermal resistance.
Next you will see Figure 6: Prismatic Cell Venting Seal.Our choice is silicone rubber.Prismatic cell venting seal sheet is also important in thermal protection of new energy batteries. This place requires materials that are extremely stable, not easily deformed by heat, and can play a supporting and protective role. Silicone rubber can be used and is fully qualified for this position.
The last part Figure 7: Battery base cooling plate.New energy vehicle water-cooled plate components are used in load-bearing and corrosion-resistant environments and conditions. Therefore, it is necessary to develop high-strength and high-corrosion-resistant composite materials to meet the design and application requirements of different water-cooled plates. PU, RPU, and FPU are all composite material development achievements that can meet the application requirements of battery water-cooling plates for new energy vehicles.
If you are interested in our products or need our assistance in any aspect, please contact us. We will cooperate with you with the fastest speed and the most professional reply. FuQiang (FQ) will do a better job in thermal insulation protection and sealing of new energy vehicle batteries. We look forward to cooperating with you!
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