Lithium ion battery quick charging method

The invention discloses a quick charging method for a lithium ion battery, belongs to the technical field of lithium batteries, and solves the problems that the battery capacity of the lithium batteryis easy to reduce and the service life of the lithium battery is shortened when the lithium battery is charged by adopting the existing method, and the quick charging method is technically characterized by comprising the following steps: verifying the polarization voltage maximum value of the to-be-charged lithium ion battery; the method comprises the following steps: taking a lithium ion battery, then charging the lithium ion battery by adopting a constant current I, then charging the lithium ion battery to a set value UA, and repeatedly charging the lithium ion battery for 515 times after the electric quantity in the lithium ion battery is exhausted; measuring the voltage of the lithium ion battery every two minutes by using a voltmeter, and recording a real-time voltage value UB; according to the embodiment of