Patent ID: 8847553

Claim:
A mobile power system, comprising: a first battery module comprising a case with an interior chamber to store N blocks of batteries arranged in series with one another, wherein the case includes a battery charging/discharging port through which the N blocks of batteries are charged and discharged and wherein a block of batteries includes M rechargeable cells arranged in parallel along the block, wherein N and M are integers greater than one, and wherein the case of the first battery module is configured to be fastened to at least one additional case of at least one additional battery module; a first battery module current limiter configured to monitor current flowing between the N blocks of batteries and the battery charging/discharging port in the case; and further configured to selectively limit the current flowing to a non-zero current that is less than a predetermined current threshold, wherein the selectively limiting is based on whether the monitored current is approaching the predetermined current threshold.