HIGH-PRECISION SYNCHRONIZED CURRENT ACQUISITION AND TESTING APPARATUS FOR SINGLE BATTERIES OF PARALLEL LITHIUM BATTERY PACK

摘要

The present invention relates to the technical field of lithium battery examination and testing, and discloses a high-precision synchronized current acquisition and testing apparatus for single batteries of a parallel lithium battery pack. The apparatus comprises a parallel lithium battery pack, a synchronized current acquisition unit, a microprocessor control unit, and a host computer data analysis and storage unit. The present invention has the advantageous effect of high-precision synchronized current acquisition for each single lithium battery (1) in a parallel lithium battery pack, wherein a battery connector realizes an extremely low impedance connection to single lithium batteries (1), ensuring an inherent internal resistance characteristic of each single lithium battery (1) in a parallel lithium battery pack and increasing the precision of current acquisition for single lithium batteries (1). After monitoring the current acquisition of each single lithium battery (1), constantan wires of different lengths and radiuses are connected by means of an adjustable internal resistance interface and an adjustable connection internal resistance interface, so as to equally adjust the equivalent inner resistance of each single lithium battery (1) and the connection resistance of single lithium batteries (1) connected in parallel.