Lithium battery multipath voltage balance control device and system

The invention discloses a lithium battery multipath voltage balance control device and system. The device comprises a plurality of lithium battery packs which are connected in parallel; the lithium battery pack comprises a plurality of lithium battery monomers which are connected in series; each single lithium battery is electrically connected with a switch, a diode and a charging receiving coil in sequence to form a loop; the lithium battery monomers are connected in parallel with a voltage detection device, a charging transmitting device is installed corresponding to the charging receiving coil, and the charging transmitting device is electrically connected with a charging bus; and the voltage detection device is in communication connection with a BMS system, and the BMS system is in communication connection with the switch. According to the invention, the voltage of the lithium battery string is balanced, the overcharge phenomenon during the charging of the battery is effectively overcome, the service life