How to choose copper busbar for electric vehicle power batteries?
Release time:
2023-05-25 17:59
Busbars, also known as busbars, are the main electrical connection solution between batteries and modules. According to the different materials, copper bars and aluminum bars are more common. Busbars are the connecting link between all high-voltage systems and socket connectors.
There are many factors to be considered in the design and manufacture of busbar, mainly including cross-sectional area, creepage distance and electrical clearance, contact resistance, Galvanic isolation, Thermal runaway, etc. The busbar installed on the power battery may move, and factors such as vibration and shock input, thermal expansion, electromagnetic force, etc. may cause the busbar to move around.
Power batteries are important components of electric vehicles, which rely on powerful motor drives, large capacity battery packs, power inverters, and charging sources to distribute power to the battery and the entire vehicle. The power battery modules need to be connected in series or in parallel with copper bars to improve the reliability of the power supply system.
1. Traditional battery connections cannot cope with vehicle vibrations, which requires the use of copper busbar connections to overcome these problems. The middle of the laminated soft copper busbar is a soft connection, which can counteract the vibration and impact generated during vehicle driving and ensure more reliable driving.
2. In terms of electrical performance, the connection between devices can withstand the high current and high voltage of the power battery, especially under the demand of fast charging. The power of the power battery will continue to increase in the future, which also means that the electrical gap and creepage distance of the electrical insulation of the power battery have a significant impact.
3. Good mechanical performance is also important. The busbar used for connecting battery modules in electric vehicles is durable and can withstand high levels of vibration. At the same time, it is necessary to ensure that the busbar has good rigidity, the battery module is complete, and has good flexibility to cope with elasticity, heat, etc.
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