The vibration encountered by batteries during transportation, as well as electric vehicle batteries, modules, and battery packs, is typically generated by demanding road conditions and the internal structure of the vehicle.
Abstract - The structural design of the electric vehicle battery bracket significantly affects the noise, vibration, and harshness (NVH) characteristics of the electric vehicle. This paper takes the battery bracket as its object of study, examining its vibration characteristics through frequency response analysis and modal analysis.
A mechanical vibration model is proposed for a plastic-cased battery. Battery state changes are characterized with the model parameters. A battery mechanical vibration measurement system is constructed. The battery mechanical model has a simple structure and high accuracy.
The impedance of the vibrating battery at each stage after cycling is notably higher than that of the fresh battery subjected to direct cycling. This observation suggests that the vibration process has a substantial impact on the internal structure of the battery.
In order to verify the model, the battery vibration experimental system is built. The vibration response data of the battery during charging and discharging are measured by a laser Doppler vibrometer. The frequency domain conversion method is used to convert the experimental data to the frequency domain amplitude of the system transfer function.
The transfer function of the battery mechanical vibration model is deduced. In order to verify the model, the battery vibration experimental system is built. The vibration response data of the battery during charging and discharging are measured by a laser Doppler vibrometer.