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.
Papers published on a yearly basis
Papers
More filters
Patent•
14 Oct 1988TL;DR: In this article, a vehicle storage battery is monitored to determine battery capacity, state of charge and certain fault conditions, and the low temperature starting limit is determined by comparing the battery's power output capability with starting power requirements of the vehicle.
Abstract: A vehicle storage battery is monitored to determine battery capacity, state of charge and certain fault conditions. The ambient temperature, battery voltage alternator/regulator output voltage and current to and from the battery are continuously measured. Current voltage (I-V) data is analyzed to determine the internal resistance and polarization of the battery. A determination is made regarding state of charge and fault conditions produced by corroded terminals and low electrolyte level. The low temperature starting limit is determined by comparing the battery's power output capability with starting power requirements of the vehicle. Data produced by the comparison are indicated on the dashboard of the vehicle.
206 citations
Patent•
28 Mar 1990
TL;DR: In this paper, an intelligent battery system senses current flowing in the direction of charge current through positive and negative terminals and battery cells of a battery pack and transmits battery parameter data to a separate output port of the battery pack.
Abstract: An intelligent battery system senses current flowing in the direction of charge current through positive and negative terminals and battery cells of a battery pack. In response, a processor within the battery pack transmits battery parameter data to a separate output port of the battery pack. The battery parameter data includes the state of charge of the battery cells, temperature data and the type of battery pack. The processor also responds to specific data requests transmitted into the battery terminals by transmitting the requested battery parameter data. The battery pack is also designed to minimize power dissipation of the processor. When the battery pack is not subjected to either charge or discharge for a predetermined period, the processor is rendered into a "light-sleep" mode in which power dissipation is substantially reduced. The processor is awakened from the light-sleep either by a timer or by charge or discharge activity to monitor the amount of charge or discharge and other battery parameters.
204 citations
TL;DR: A data-driven method based on Gaussian process regression (GPR) is proposed to provide a feasible solution to SOC estimation of battery packs, and its superiority includes the ability to approximate nonlinearity accurately, nonparametric modeling, and probabilistic predictions.
204 citations
TL;DR: In this paper, a data-driven based adaptive SoC estimator is established with an adaptive extended Kalman filter, which has the potential to overcome the estimation error against battery degradation and varied operating environments.
202 citations
Patent•
10 Nov 1997TL;DR: A battery management system (100) comprises input means (102) for receiving input signals, such as current or voltage, which represent a physical quantity of a battery as mentioned in this paper, and output means (104) for outputting an output signal which is derived from a state of the electrochemical storage reaction.
Abstract: A battery management system (100) comprises input means (102) for receiving input signals, such as current or voltage, which represent a physical quantity of a battery. In operation, processing means (105) of the battery management system (100) calculate a physical quantity of the battery, such as the State of Charge, based on the input signals by using an electrochemical/physical model of the battery. The model includes a representation of a main electrochemical storage reaction, whose behaviour is calculated in dependence on a battery temperature. The processing means (105) calculates the battery temperature based on a temperature model of a temperature development in the battery. The battery management system (100) comprises output means (104) for outputting an output signal which is derived from a state of the electrochemical storage reaction. The battery management system (100) is, advantageously, used in a smart battery (10) or a battery charger/discharger (200). The model is, advantageously, also used in a battery simulator.
202 citations