POWER STORAGE SYSTEM

• Main Author: IZUMI JUNTA
• Format: Patent
• Language: English; Japanese
• Published: 08.02.2016
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; 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; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSPORTING; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To suppress deterioration of fuel economy due to an input-output limit associated with the suppression of a temperature rise at an electrified component.SOLUTION: A power storage system has a controller for performing charge-discharge control in accordance with a temperature at an electrified component electrically connected to a power storage device. The controller includes: an evaluation value calculation part for calculating an evaluation value for evaluating a temperature state of the electrified component on the basis of a current value detected when charging-discharging the power storage device; a change part for limiting an upper limit value of discharging or charging power of the power storage device in the case of the evaluation value exceeding a threshold; and an atmospheric temperature state determination part for counting low-temperature continuation time in which the electrified component is in the state of being at a given atmospheric temperature or lower until an ignition switch of a vehicle is turned on. In a case where the low-temperature continuation time is equal to or more than a given period of time before the ignition switch of the vehicle is turned on, the evaluation value calculation part calculates the evaluation value smaller for a certain period of time after the ignition switch of the vehicle has been turned on.SELECTED DRAWING: Figure 7 【課題】通電部品の温度上昇の抑制に伴う入出力制限による燃費の悪化を抑制する。【解決手段】本発明の蓄電システムは、蓄電装置に電気的に接続された通電部品の温度に応じた充放電制御を行うコントローラを有する。コントローラは、蓄電装置の充放電時において検出される電流値に基づいて、通電部品の温度状態を評価するための評価値を算出する評価値算出部と、評価値が閾値を超えた場合に蓄電装置の放電電力又は充電電力の上限値を制限する変更部と、車両のイグニッションスイッチがオンされるまでの間に通電部品が所定の雰囲気温度以下の状態にある低温継続時間をカウントする雰囲気温度状態判定部と、を有する。評価値算出部は、車両のイグニッションスイッチがオンされる前の低温継続時間が所定時間以上である場合に、車両のイグニッションスイッチがオンされた後の一定時間までの間、評価値を小さく算出する。【選択図】図７