Study on the influence of magnetic field on the performance of lithium-ion batteries

As the power source of new energy vehicles, the impact of battery performance should be considered. The magnetic field is generated by the change of the moving charge or the electric field. The magnetic field could magnetize the battery, and many small magnetic dipoles appear. Therefore, an experimental method of charge and discharge performance test and internal resistance test imposing magnetic field effect was conducted. Then the effect of the magnetic field effect on the charge–discharge performance and internal resistance of widely used 18650 lithium-ion battery was studied. The results showed that the trends of terminal voltage during charge and discharge process with and without magnetic field are basically the same. And the charge–discharge performance with imposing the magnetic field is much better. The discharge capacity, charge capacity, discharge energy and charge energy increase obviously while the magnetic induction intensity increases. This study can effectively help to solve the problem of short range of new energy vehicles.