To estimate the capacity of a power storage element after a measurement unit has stopped.SOLUTION: Provided is a power storage device 50 comprising external terminals 51, 52, a power storage element 60, a switch 53 located in a current path 55P from the power storage element 60 to the external terminal 51, a measurement unit 150 for measuring the current and voltage of the power storage element 60, and a management unit 130. The measurement unit 150 and the management unit 130 receive electric power supply from the power storage element 60, the lowest operating voltage V1 of the management unit 130 being lower than the lowest operating voltage V2 of the measurement unit 150. When the voltage of the power storage element 60 drops below a threshold voltage V0 higher than or equal to the lowest operating voltage V2 of the measurement unit 150, the management unit 130 blocks an electricity discharge to the outside through the external terminal 52 by control of the switch 53, and estimates the capacity of the power storage element 60 on and after a discretionary time t1 on the basis of an elapsed time from the discretionary time t1 in a first period in which the voltage of the power storage element 60 drops from the threshold voltage V0 down to the lowest operating voltage V2 of the measurement unit 150.SELECTED DRAWING: Figure 9
【課題】計測部の停止後、蓄電素子の容量を推定する。【解決手段】蓄電装置50であって、外部端子51、52と、蓄電素子60と、前記蓄電素子60から外部端子51への電流経路55Pに位置するスイッチ53と、前記蓄電素子60の電流及び電圧を計測する計測部150と、管理部130と、を備え、前記計測部150と前記管理部130は、前記蓄電素子60から電力の供給を受け、前記管理部130の最低動作電圧V1は、前記計測部150の最低動作電圧V2より低く、前記管理部130は、前記蓄電素子60の電圧が前記計測部150の最低動作電圧V2以上の閾値電圧V0を下回った場合、前記スイッチ53の制御により前記外部端子52を通じた外部への放電を遮断し、前記蓄電素子60の電圧が前記閾値電圧V0から前記計測部150の最低動作電圧V2まで低下する第1期間の任意時点t1から経過時間に基づいて、前記蓄電素子60の前記任意時点t1以降の容量を推定する。【選択図】図9
POWER STORAGE DEVICE AND CAPACITY ESTIMATION METHOD FOR POWER STORAGE ELEMENT
蓄電装置、蓄電素子の容量推定方法
2020-10-01
Patent
Elektronische Ressource
Japanisch
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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