Thermal management for rechargeable Li-ion batteries
Thermal management for rechargeable Li-ion batteries
The rapid growth of the market for electric vehicles (such as electric cars, electric buses and electric trucks) leads to ever higher demands on the efficiency and service life of lithium-ion battery systems.
Acceptance will only increase significantly if the range of the vehicles increases significantly.
The performance of lithium-ion batteries depends heavily on maintaining the correct cell temperature. Therefore, an effective thermal management system is critical to achieve maximum performance when operating under a wide range of environmental conditions.
Primary influencing factors for battery thermal management systems
Four primary influencing factors are at the center of suitable battery thermal management:
- Cooling
- Heating
- insulation
- ventilation
These four key factors, when properly combined, maximize battery safety, life expectancy, available power and capacity.
Cooling of the rechargeable Li-ion batteries
Due to the inherent inefficiencies of lithium-ion battery systems, the cells of the batteries generate heat as they release energy. For safety and performance reasons, this heat must be removed from the system to avoid overheating that can damage the cells.
the dr Dietrich Müller GmbH provides various ready-made solutions that are described in the article 8 ready-made thermal management solutions be explained. gap filler , thermally conductive foils and gap pads are preferred solutions here.
Heating of the rechargeable Li-ion batteries
On the other hand, if the cell temperature falls below the desired temperature limit, performance will also be affected and the cells will need an additional heat source.
the dr Dietrich Müller GmbH supplies 4 different heating systems with which the desired and required heating capacity can be achieved.
The four heating systems for the rechargeable Li-ion batteries are as follows:
1. Wire Heaters - Wire heaters
2. PTC Heaters - PTC heater
3. Polyimide film based Heaters
4. High-performance paper based heaters
Insulation of the rechargeable Li-ion batteries
Using appropriate insulating materials will help reduce temperature fluctuations within the battery pack when exposed to extreme weather conditions.
It also reduces the energy required to maintain a constant and desirable internal temperature needed for optimal battery performance.
Battery thermal insulation materials can perform the following functions:
- Thermal insulation of the rechargeable Li-ion batteries
- UL94 V0 - Fire Protection
- electrical insulation
- compressibility
- Technical cleanliness
- burst protection
Ventilation of the rechargeable Li-ion batteries
A well thought-out ventilation system serves two functions, the extraction of dangerous gases within the battery system and the support of the cooling system. However, a ventilation system can also undermine battery heating and insulation if not properly designed.
With the materials of the Dr. Dietrich Müller GmbH To ventilate the rechargeable Li-ion batteries, permeable membrane materials are used, which are brought into different contours.
We also manufacture membranes that include a built-in frame. The membranes are often made of PTFE foil.
