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

Claim 8:
9. A battery relay diagnostic method for diagnosing a battery system including a plurality battery packs, a charge and discharge controller connected between the battery packs connected in parallel, and a load part, the charge and discharge controller configured to control charge and discharge of battery cell modules included in the battery packs, the battery packs including the battery cell module including a plurality of battery cells and a switching unit, and the switching unit including a first switch provided between a positive ((+)) terminal of the battery cell module and the load part and a second switch provided between a negative ((−)) terminal of the battery cell module and the load part, the diagnostic method comprising:
performing 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 performing diagnosis on the first switch and the second switch includes:
performing 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
performing 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.