STORAGE BATTERY MANAGING APPARATUS AND VEHICLE CONTROLLING APPARATUS PROVIDING THE SAME
First Claim
1. A storage battery managing apparatus comprising:
- a storage battery having a plurality of chargeable-dischargeable unit cells connected therein;
cell voltage detection means for detecting the voltage of each unit cell;
storage battery voltage detection means for detecting the storage battery voltage; and
current detection means for detecting a current flowing under no-load conditions or charge-discharge conditions of said storage battery;
wherein the storage battery managing apparatus includes processing means for obtaining a degree of SOC imbalance by use of the cell voltage of each unit cell detected by said cell voltage detection means when said storage battery is being neither charged nor discharged; and
for calculating highest and lowest SOCs from the average SOC obtained from the storage battery voltage detected by said storage battery voltage detection means and the degree of SOC imbalance when said storage battery is being charged or discharged, thereby managing charge-discharge current and charge-discharge power.
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Accused Products
Abstract
An object of the present invention is to provide a storage battery managing apparatus that can ensure charge-discharge control of a storage battery in consideration of state variation of each unit cell even if the battery pack includes a number of component unit cells, and a vehicle controlling apparatus providing the same. A storage battery 110 includes a plurality of chargeable-dischargeable unit cells connected. Battery management ICs 122 detect the cell voltage of each unit cell. A voltage sensor 150 detects a storage battery voltage. A current sensor 140 detects currents to be charged and discharged in the storage battery. Processing means 132 obtains a degree of SOC imbalance by use of the cell voltage of each unit cell detected by the battery management ICs 122 when the storage battery is being neither charged nor discharged. The processing means 132 calculates highest and lowest SOCs from the average SOC obtained from the storage battery voltage detected by the voltage sensor 150 and the degree of SOC imbalance when the storage battery is being charged or discharged.
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Citations
6 Claims
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1. A storage battery managing apparatus comprising:
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a storage battery having a plurality of chargeable-dischargeable unit cells connected therein; cell voltage detection means for detecting the voltage of each unit cell; storage battery voltage detection means for detecting the storage battery voltage; and current detection means for detecting a current flowing under no-load conditions or charge-discharge conditions of said storage battery; wherein the storage battery managing apparatus includes processing means for obtaining a degree of SOC imbalance by use of the cell voltage of each unit cell detected by said cell voltage detection means when said storage battery is being neither charged nor discharged; and
for calculating highest and lowest SOCs from the average SOC obtained from the storage battery voltage detected by said storage battery voltage detection means and the degree of SOC imbalance when said storage battery is being charged or discharged, thereby managing charge-discharge current and charge-discharge power. - View Dependent Claims (2, 3, 4, 5)
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6. A vehicle controlling apparatus comprising:
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a storage battery managing apparatus including;
a storage battery having a plurality of chargeable-dischargeable unit cells connected therein;
cell voltage detection means for detecting the voltage of each unit cell;
storage battery voltage detection means for detecting the storage battery voltage; and
current detection means for detecting a current flowing under no-load conditions or charge-discharge conditions of the storage battery; anda vehicle controlling apparatus including vehicle control means for converting the power supplied from the storage battery to AC power by use of an inverter, supplying the AC power to a vehicle drive motor, converting the power outputted when the motor operates as a dynamo by use of the inverter, storing the power in the storage battery, and controlling the inverter;
thereby controlling the drive of the motor;wherein said storage battery managing apparatus includes processing means for obtaining a degree of SOC imbalance by use of the cell voltage of each unit cell detected by the cell voltage detection means when the storage battery is being neither charged nor discharged; wherein said storage battery managing apparatus includes processing means for calculating highest and lowest SOCs from the average SOC obtained from the storage battery voltage detected by the storage battery voltage detection means and the degree of SOC imbalance when the storage battery is being charged or discharged, thereby managing charge-discharge current and charge-discharge power; and wherein said vehicle control means controls the inverter such that the storage battery is operated within ranges of the permissible charge currents or the permissible charge power and the permissible discharge currents or the permissible discharge power determined by said storage battery managing apparatus.
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Specification