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In this paper, a dynamic (time varying) model of charging with constant current has been developed for lead acid batteries. This model provides a means to compute analytically the open circuit voltage (OCV) at a given time and the corresponding state of charge (SOC).
A number of studies on fast-charging techniques for batteries have been reported in the literature and they can be divided into two main categories: static and dynamic current profiles. Firstly, a static fast-charging current profile is a current profile that uses one stage of current in one direction, such as a constant current (CC) profile.
To determine accurately the total charge as the integral of the current value, absolute accuracy in mA is required in the current sensor. Furthermore, this measurement must be performed in the automotive temperature range of − 40 to 85 °C. (a) Battery current sensor usage in the EV.
The results revealed that the dynamic fast-charging profile has a significant impact on reducing the capacity fade of the lithium-ion battery cells compared with to the static fast-charging profile. Indeed after 1700 cycles, the cell aged with static fast-charging profile (CC-CV) recording the highest capacity loss approximately 24%.
For example, besides SOC, current, voltage, and temperature used in this work, the dynamics of more physics-informed battery parameters, such as capacity and internal resistance, could be estimated 34 or embedded in our model for battery safety with real-world data.
Current from the battery module with stacked cells passes through the busbar in the junction box and is measured by the current sensor.
Compared with conventional diagnosis methods that rely on cell temperature and voltage measurements, the dynamic impedance spectrum (DIS) provides novel insights …
The voltage and surface temperature are measured at 1 Hz for each cell and current is measured for the entire module during locomotive operations. The current is positive during discharging …
The analysis and detection method of charge and discharge characteristics of lithium battery based on multi-sensor fusion was studied to provide a basis for effectively …
an inherently wide dynamic range and high sensitivity for measuring the battery current. The design uses the dierential detection of two sensors to eliminate in‑vehicle common‑mode...
A dynamic charge current scaling (DCCS) technique, which dynamically adjusts the charging current and the termination charging voltage in constant-current (CC) charge …
Md. Navid Akbar et al. 2015 • A dynamic model of constant current charging has been developed for lead acid batteries • Helpful in determining SOC of battery without testing it in an ...
Similar to dynamic voltage and frequency scaling (DVFS) technology in power management ICs (PMICs), this paper proposes a dynamic charge current scaling (DCCS) technique, which …
However, the influence of fast-charging current profiles should be investigated to identify their impact on battery functionality over time. In this article, static and dynamic fast …
ICs (PMICs), this paper proposes a dynamic charge current scaling (DCCS) technique, which dynamically adjusts the charging current and the termination charging voltage in constant …
In this paper, a lithium plating (LP) detection method for lithium-ion batteries is presented that can be applied during a constant-current-constant-voltage (CCCV) charging process and along …
Battery designs play an important role in the design of electric vehicles, and a wide variety of battery types are available in the market. A distinguishing feature of these …
Voltage and current variations during the charging of different batteries: (a) The voltage variation; and (b) The current variation. ROC curves for different comparison models. …
Scientific Reports - High-precision robust monitoring of charge/discharge current over a wide dynamic range for electric vehicle batteries using diamond quantum sensors
The battery module current was measured up to 130 A covering WLTC driving pattern, and the accuracy of the current sensor to estimate battery state of charge was …
Specifically, a sinusoidal current is superimposed on the charging current, and the battery impedance is analyzed in the frequency domain without interrupting the charging …
The non-destructive LP detection methods that are based on the measurements of the current and voltage can be categorized as follows: a) Current interruption impedance …
We test our detection algorithm on released datasets comprising over 690,000 LiB charging snippets from 347 EVs. Our model overcomes the limitations of state-of-the-art …
The data includes average cell voltage, charging current, temperature, battery capacity, estimated SOC during charging, and anomaly labels manually labeled afterward. ...
However, the influence of fast-charging current profiles should be investigated to identify their impact on battery functionality over time. In this article, static and dynamic fast …
Md. Navid Akbar et al. 2015 • A dynamic model of constant current charging has been developed for lead acid batteries • Helpful in determining SOC of battery without testing …