Battery charging and discharging control apparatus for hybrid powered vehicle
First Claim
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1. A battery control apparatus for a hybrid powered vehicle mounted with an engine and a motor, comprising:
- a battery set for supplying electricity to said motor, having a plurality of battery blocks connected in series, each of said battery blocks containing a predetermined number of battery cells;
a generator which is driven by said engine and supplies electricity to said battery set;
an SOC detection device for detecting SOC of the battery set;
a control device for controlling, in accordance with an SOC detected in said SOC detection device, the supply of electricity to the motor from said battery set and the generation of electricity in the generator; and
an overdischarge detection device for detecting an overdischarge in at least one of the battery cells;
whereinsaid control device controls the supply of electricity to the motor and the generation of electricity in the generator when an overdischarged cell is detected by said overdischarge detection device such that charging of said battery set is effectuated.
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Abstract
A voltage detector (12) detects the voltage levels of the battery blocks of the battery set (10). A presence of an overdischarged cell is detected when a voltage difference between each of the battery blocks reaches or exceeds a predetermined value (for example, 1V). At this point, a battery ECU (14) sets the SOC value of the battery set (10) at the lower control limit value (for example, 20%). This triggers an HV ECU (16) to control the load (18) such that charging is effectuated in the battery set (10). If further discharge occurs, the battery set (10) is disconnected from the load (18) by a relay (20).
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Citations
6 Claims
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1. A battery control apparatus for a hybrid powered vehicle mounted with an engine and a motor, comprising:
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a battery set for supplying electricity to said motor, having a plurality of battery blocks connected in series, each of said battery blocks containing a predetermined number of battery cells; a generator which is driven by said engine and supplies electricity to said battery set; an SOC detection device for detecting SOC of the battery set; a control device for controlling, in accordance with an SOC detected in said SOC detection device, the supply of electricity to the motor from said battery set and the generation of electricity in the generator; and an overdischarge detection device for detecting an overdischarge in at least one of the battery cells;
whereinsaid control device controls the supply of electricity to the motor and the generation of electricity in the generator when an overdischarged cell is detected by said overdischarge detection device such that charging of said battery set is effectuated. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification