PROBLEM TO BE SOLVED: To provide a vehicle and charge state detection system thereof that can accurately detect a state of charge of an on-board lead battery on the basis of a battery parameter such as open circuit voltage OCV or internal resistance R, or the like of the lead battery.SOLUTION: A standard relation between an OCV of a lead battery and SOC thereof is preliminarily registered in a corresponding relation storage unit 101. An SOH calculation unit 103 is configured to calculate SOH of the lead battery. A new battery discrimination unit 104 is configured to discriminate whether the on-board lead battery is interchanged with a new lead battery. An OVC measurement unit 105 is configured to calculate an average value OCVave0 of a plurality of OCVs. A correction coefficient calculation unit 106 is configured to calculate a correction coefficient Kocv on the basis of open circuit voltages OCVmap and OCVave0 in a state of full charge to be obtained from the standard corresponding relation. An OCV calibration unit 107 is configured to calibrate a current open circuit voltage OCV0 on the basis of the correction coefficient Kocv. An SOC calculation unit 108 is configured to apply a calibrated OCV'0 to the corresponding relation to calculate the state of charge SOC of the lead battery.SELECTED DRAWING: Figure 2
【課題】車載鉛電池の充電状態を、その開回路電圧OCVや内部抵抗Rなどの電池パラメータに基づいて精度よく検知できる車両およびその充電状態検知システムを提供する。【解決手段】対応関係記憶部101には鉛電池のOCVとSOCとの標準的な対応関係が予め登録されている。SOH計算部103は鉛電池のSOHを計算する。新品電池判別部104は、車載の鉛電池が新品と交換されたか否かを判別する。OVC計測部105は複数のOCVの平均値OCVave0を算出する。補正係数計算部106は、標準的な対応関係から求まる満充電状態における開回路電圧OCVmapおよびOCVave0に基づいて補正係数Kocvを計算する。OCV較正部107は、補正係数Kocvに基づいて現在の開回路電圧OCV0を較正する。SOC計算部108は、較正済OCV'0を対応関係に適用して鉛電池の充電状態SOCを計算する。【選択図】図2
VEHICLE AND BATTERY STATE DETECTION SYSTEM THEREOF
車両およびその電池状態検知システム
2017-12-14
Patent
Electronic Resource
Japanese
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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