BATTERY CONTROL DEVICE, AND, BATTERY SYSTEM

• Main Author: HYODO YOSHIYUKI
• Format: Patent
• Language: English; Japanese
• Published: 13.12.2018
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSPORTING; VEHICLES IN GENERAL

To provide a battery control device capable of preventing open-circuit voltages from being varied between batteries constituting a battery pack, and, a battery system.SOLUTION: Based on a reference voltage value that is a magnitude of a voltage for each battery block 21 which is detected when it is discriminated that a battery pack 20 is in a non-electrified state, a battery control device 31 calculates a charge capacity for each battery block 21 and determines a target discharge amount of each battery block 21 in accordance with a difference between a minimum charge capacity among charge capacities of multiple battery blocks 21 and the charge capacity of each battery block 21. The battery control device 31 then defines the target discharge amount as a target and discharges each of the battery blocks 21 through a discharge circuit C1 that is provided for each battery block 21, A period in which discharge processing is performed includes a period in which it is discriminated that the battery pack 20 is in an electrified state.SELECTED DRAWING: Figure 1 【課題】組電池を構成する電池における開放電圧のばらつきを抑えることのできる電池制御装置、および、電池システムを提供する。【解決手段】電池制御装置３１は、組電池２０が無通電状態であると判定されたときに検出された電池ブロック２１ごとの電圧の大きさである基準電圧値に基づいて、電池ブロック２１ごとの充電容量を求め、複数の電池ブロック２１の充電容量のうちの最小の充電容量と各電池ブロック２１の充電容量との差に応じて各電池ブロック２１の目標放電量を決定する。そして、電池制御装置３１は、目標放電量を目標として、電池ブロック２１ごとに設けられた放電回路Ｃ１を通じて、各電池ブロック２１を放電させる。放電処理を行う期間には、組電池２０が通電状態であると判定される期間が含まれる。【選択図】図１