CHARGING STATE ADJUSTING DEVICE FOR BATTERY PACK

• Main Author: ARAI TAKUICHI
• Format: Patent
• Language: English; Japanese
• Published: 28.05.2015
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

PROBLEM TO BE SOLVED: To provide a charging state adjusting device for battery pack that can adjust a plurality of electric cells constituting a battery pack into uniform SOCs even when the electric cells differ in temperature individually.SOLUTION: In a charging state adjusting device 100, a specifying part 43 specifies a reference cell such that a voltage stored in a discharging voltage storage part 41 and a voltage stored in a charging voltage storage part 42 are both minimum among a plurality of electric cells B constituting a battery pack 10. A shor-circuit processing part 44 shorts an electric cell B which meets both a condition 1 and a condition 2 among the electric cells B. Here, the condition 1 is that the voltage stored in the discharging voltage storage part 41 is larger than a predetermined value on the basis of the voltage in discharging of the reference cell, and the condition 2 is that the voltage stored in the charging voltage storage part 42 is larger than a predetermined value on the basis of the voltage in charging of the reference cell. 【課題】組電池を構成する複数の単電池の個々で温度が異なった場合であっても、単電池のＳＯＣを揃える方向に調整することが可能な組電池の充電状態調整装置を提供する。【解決手段】充電状態調整装置１００において、特定部４３は、組電池１０を構成する複数の単電池Ｂのうち、放電電圧記憶部４１によって記憶された電圧と、充電電圧記憶部４２によって記憶された電圧とが共に最小である基準電池を特定する。短絡処理部４４は、複数の単電池Ｂのうち、下記条件１および下記条件２を共に満たす単電池Ｂを、短絡回路Ｄを通じて短絡させる。ここで、条件１：基準電池における放電時の電圧を基準として、放電電圧記憶部４１によって記憶された電圧が予め定められた値よりも大きい；条件２：基準電池における充電時の電圧を基準として、充電電圧記憶部４２によって記憶された電圧が予め定められた値よりも大きい；【選択図】図１