POWER STORAGE STATE ADJUSTMENT DEVICE, BATTERY PACK, LOAD SYSTEM, AND POWER STORAGE STATE ADJUSTMENT METHOD

• Main Author: TAKAI MASAMI
• Format: Patent
• Language: English; Japanese
• Published: 19.03.2020
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

To provide a power storage state adjustment device capable of improving charge/discharge efficiency.SOLUTION: A power storage state adjustment device is configured to adjust a power storage state of a battery pack 100 in which a plurality (e.g., four) of storage batteries BAT1-BAT4 are connected in series. The power storage state adjustment device comprises: a primary-side coil that is connected in series with the plurality of storage batteries; a plurality of secondary-side coils which are connected respectively in parallel with the plurality of storage batteries and to which energy stored in the primary-side coil is transferred; and a cell balance control system for setting a target value (balance time target value) of balance time that is time from charge start or discharge start of the battery pack 100 to balancing voltage of the plurality of storage batteries when not charging or discharging the battery pack, and adjusting the quantity of total energy to be stored in the primary-side coil on the basis of the target value.SELECTED DRAWING: Figure 3 【課題】 充放電効率を向上できる蓄電状態調整装置を提供できる。【解決手段】 蓄電状態調整装置は、複数（例えば４つ）の蓄電池ＢＡＴ１〜ＢＡＴ４が直列に接続された組電池１００の蓄電状態を調整する蓄電状態調整装置であって、複数の蓄電池と直列に接続された一次側コイルと、複数の蓄電池それぞれと並列に接続され、一次側コイルに蓄えられたエネルギが伝達される複数の二次側コイルと、組電池１００の充電開始又は放電開始から複数の蓄電池の電圧がバランスするまでの時間であるバランス時間の目標値（バランス時間目標値）を組電池の充放電時以外のときに設定し、該目標値に基づいて、一次側コイルに蓄積される総エネルギ量を調整するセルバランス制御系と、を備えている。【選択図】図３