BATTERY CONTROL METHOD AND BATTERY CONTROL DEVICE

• Main Authors: YAMAGISHI TAKUMA, OGAWA HIROSHI, YOSHIOKA SADAAKI
• Format: Patent
• Language: English; Japanese
• Published: 22.03.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY

To provide a battery control method and device capable of suppressing a change speed of SOC in a state where the temperatures of cells are low.SOLUTION: A control command is displayed on a display for detecting voltages of a plurality of cells 1, detecting temperatures of the plurality of cells 1, calculating an SOC of a battery 3 using an SOC arithmetic expression including a predetermined coefficient based on the detected voltages, and displaying the calculated SOC on the display. In arithmetic processing (an arithmetic flow) of the SOC using the SOC arithmetic expression, in a case where a lowest temperature (TL) is lower than a predetermined temperature threshold (Tth) and a temperature difference (ΔT) is equal to or more than a predetermined temperature difference threshold (ΔTth), the SOC is calculated using the SOC arithmetic expression in which the coefficient is a first coefficient (K1). In a case where the lowest temperature (TL) is lower than the predetermined temperature threshold (Tth) and the temperature difference (ΔT) is less than the predetermined temperature difference threshold (ΔTth), the SOC is calculated using the SOC arithmetic expression in which the coefficient is a second coefficient (K2).SELECTED DRAWING: Figure 5 【課題】セルの温度が低い状態でＳＯＣの変化速度を抑制できるバッテリ制御方法及び装置を提供する。【解決手段】複数のセル１の電圧を検出し、複数のセル１の温度を検出し、検出された電圧に基づき、所定の係数を含んだＳＯＣ演算式を用いて、バッテリ３のＳＯＣを演算し、演算されたＳＯＣをディスプレイに表示させる制御指令を、ディスプレイに表示する。そして、ＳＯＣ演算式を用いたＳＯＣの演算処理（演算フロー）では、最低温度（ＴＬ）が所定の温度閾値（Ｔｔｈ）未満であり、かつ、温度差（ΔＴ）が所定の温度差閾値（ΔＴｔｈ）以上である場合には、係数を第１係数（Ｋ１）としたＳＯＣ演算式を用いて、ＳＯＣを演算し、最低温度（ＴＬ）が所定の温度閾値未満（Ｔｔｈ）であり、かつ、温度差（ΔＴ）が所定の温度差閾値（ΔＴｔｈ）未満である場合には、係数を第２係数（Ｋ２）としたＳＯＣ演算式を用いて、ＳＯＣを演算する。【選択図】図５