Patent ID: 11946974
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  Y | IPC G  H

Claim 0:
1. A battery relay diagnostic device adapted to diagnose a battery system including a plurality of battery packs connected in parallel and a charge and discharge controller connected between the plurality of battery packs and a load part and controls charge and discharge of the plurality of battery packs, the battery packs including a battery cell module including a plurality of battery cells and a switching unit including a first switch provided between a positive ((+)) terminal of the battery cell module and a load part and a second switch provided between a negative ((−)) terminal of the battery cell module and the load part, the battery relay diagnostic device comprising:
a switching controller configured to control a current applied to the battery cell module by controlling on/off of the switching unit; and
a diagnostic circuit configured to perform diagnosis on the first switch and the second switch based on an on/off state of the first switch and the second switch,
wherein the diagnostic unit is configured to:
perform diagnosis sequentially on at least one switch generating an interference between the plurality of battery packs among the first switch and the second switch for each of the plurality of battery packs, based on the on/off state, and
perform diagnosis simultaneously on at least one switch not generating the interference between the plurality of battery packs among the first switch and the second switch in all of the plurality of the battery packs, based on the on/off state.