Topic
State of charge
About: State of charge is a research topic. Over the lifetime, 12013 publications have been published within this topic receiving 201419 citations. The topic is also known as: SoC & SOC.
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TL;DR: In this article, the authors investigated the environmental pressure effect on thermal runaway and fire behaviors in the 18650 lithium-ion battery with various cathodes and states of charge (SOC).
69 citations
Patent•
17 Nov 2009TL;DR: In this paper, a vehicle is equipped with a battery configured to be rechargeable, a motor generator configured to generate the driving force of the vehicle by use of electric power stored in the battery, and a switch configured so as to switch between generation of a command for extending the use period of the battery and stop of generation of the command.
Abstract: A vehicle is equipped with a battery configured so as to be rechargeable, a motor generator configured so as to generate the driving force of the vehicle by use of electric power stored in the battery, a switch configured so as to switch between generation of a command for extending the use period of the battery and stop of generation of the command, and an ECU for controlling the state of charge of the battery. The ECU sets the control range of SOC of the battery. When the switch stops generation of the command, the ECU sets the control range to a first range. Meanwhile, when a command is generated by the switch, the ECU sets the control range to a second range narrower than the first range.
69 citations
TL;DR: In this paper, an improved adaptive unscented Kalman filter (AUKF) approach is developed for measurement noise variance online update based on the idea of orthogonality between residual and innovation during the estimation.
69 citations
Patent•
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21 Sep 1972
TL;DR: In this article, a hybrid power train for a self-propelled vehicle is designed to reduce the emission of atmospheric pollutants, where the chemically fueled prime mover and the secondary-battery powered electric dynamotor are joined together and joined to the output shaft by fixed ratio rotating linkage.
Abstract: The disclosed hybrid power train for a self-propelled vehicle is designed to reduce the emission of atmospheric pollutants. The chemically fueled prime mover and the secondary-battery powered electric dynamotor are joined together and joined to the output shaft by fixed ratio rotating linkage. The prime mover is operated as a quasi-constant -torque device, with its torque able to be varied in response to the state of charge of the battery or to operator torque demands in excess of certain predetermined amounts. The instantaneous torque output of the combined combustion engine/electric motor power train is controlled by a mechanical accelerator control which causes the dynamotor to either add to or subtract from the torque produced by the prime mover. When added torque is required by the vehicle, the dynamotor takes energy from the storage battery. When less torque is required, the extra energy produced by the prime mover is fed by the dynamotor into the storage battery. The low pollution qualities of this power train are realized, in part, by the uncoupling of the prime mover throttle from the rapid variations of the accelerator control typical of urban driving.
69 citations
TL;DR: In this paper, the problem of non-destructive determination of the state of charge of nickel-cadmium batteries has been examined experimentally and theoretically from the viewpoint of internal impedance, and it is shown that the modulus of the impedance is mainly controlled by diffusion at all states of charge.
Abstract: The problem of nondestructive determination of the state-of-charge of nickel-cadmium batteries has been examined experimentally as well as theoretically from the viewpoint of internal impedance. It is shown that the modulus of the impedance is mainly controlled by diffusion at all states of charge. Even so, a prediction of the state of charge is possible if the equivalent series/parallel capacitance or the alternating current phase shift is measured at a sufficiently low a.c. test frequency (5–30 Hz) which also avoids inductive effects. These results are explained on the basis of a uniform transmission-line analog equivalent circuit for the battery electrodes.
69 citations