Under the guidance of the policy of "carbon peaking and carbon neutrality", the installed capacity of wind power and photovoltaic power generation has grown rapidly. Energy storage system is a key link to realize the popularization and application of renewable energy such as solar energy and wind energy. It can solve the difference between power generation and electricity consumption and the impact of intermittent renewable energy generation directly connected to the grid, and regulate the quality of electric energy.

Energy storage technology can improve the reliability and flexibility of the power system, reduce the cost of the power system and reduce the dependence on traditional fuel units, so as to realize the development of sustainable energy. With the further development and application of the technology, energy storage technology will become an indispensable part of the clean energy system in the future.

The energy storage inverter can provide the two-way conversion between the electric energy of the grid and the electric energy of the battery. That is, the alternating current can be converted into direct current and stored in the battery. When the power failure occurs, the inverter will convert the direct current in the battery into alternating current.

Energy dissipation occurs when energy is input or output in an energy storage system. The energy dissipation is usually converted into heat. High temperature not only affects device efficiency, but may even damage device components or cause accidents such as fire.

How to solve the thermal management problem in optical storage system

How to dissipate heat is the most important problem in optical storage system. At present, most electronic products fail, 55% of the reason is due to poor heat dissipation. The working reliability of electronic devices is very sensitive to temperature. When the device temperature increases by 1 degree above 70-80 degrees, the reliability will decrease by 5%. If the temperature is too high, the reliability of electronic products will be reduced.

Thermal management of energy storage inverter

The main heating devices in the inverter are chip, switching tube (IGBT, MOSFET), magnetic core components (inductor, transformer), especially the core components of the inverter - IGBT in the process of operation generates a lot of heat.

The inverter will use forced air cooling for the heat dissipation of the whole machine, in addition to the power device will be added with a radiator to expand the heat dissipation area, accelerate the heat diffusion. Thermal conductive interface materials (thermal conductive gaskets and insulating sheets) are required between power devices and heat sinks to fill the gap and speed up the conduction of heat from the heat source to the heat sink.

Thermal gasket

Heat conduction gasket material itself has a certain degree of flexibility, good fit between the power device and the cooling aluminum sheet or machine shell, so as to achieve the best heat conduction and heat dissipation purposes.

Thermal insulating sheet

It has excellent voltage breakdown resistance, high thermal conductivity and high voltage insulation performance. It is mainly used between thermal semiconductor devices and heat dissipation substrate, and plays the role of thermal conductivity and insulation.

Thermal management of energy storage batteries

At present, there is not a mainstream fixed design for battery thermal design, although the design is different, but usually requires the use of thermal interface materials. For example, on the battery pack bottom plate, the gap between the battery core and the battery core, the commonly used thermal interface materials are thermal conductivity gaskets, thermal conductivity gel, thermal conductivity potage glue, etc. In some designs, heat-resistant insulation materials, such as silicone foam, are used to prevent thermal failure from spreading between cells.

Thermal gel

One component thermal gel is a kind of precured and highly adaptive thermal gel. The material has excellent resistance and is ideal for large gap tolerance applications. Thermal gel can be painted manually or by automatic dispensing equipment.

Two-component thermal gel is a curable paste at room temperature. After curing, it presents a soft elastic body. It is suitable for vibration applications or heat sources in motion. The same as a single component, also suitable for automatic dispensing operations.

Heat-conducting potting adhesive

Excellent insulation performance, with good waterproof, moisture-proof and anti-aging properties. For the heating element heat dissipation at the same time play a buffer role, protect the element from environmental damage.

Silicone foam

Silicone foam, energy storage battery insulation is the first choice, with heat insulation and noise reduction, shock buffer, filling gap role. In the energy storage battery, the silicone foam can effectively isolate the contact between the electrolyte and the battery shell, reduce the heat transfer inside the battery, and improve the efficiency of the battery. At the same time, the silicone foam can also reduce the noise interference of the energy storage battery in the work project, and ensure the stable operation of the battery.