Ultra fast charging system on lithium ion battery

Leong, C.K.; Gan, Yong; Gan, G.D; Phuan, Z.Y; Yoong, M.K; Cheah, B.K; Chew, Kuew Wai

doi:10.1109/student.2010.5686987

Cited by 13 publications

(8 citation statements)

References 1 publication

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“…Compared to the traditional CC-CV method, pulse charging has many advantages, including high efficiency, high charging rate, and a long battery life cycle [11]. The charge speed of the VFPCS and the charge efficiency of the DVVPCS are good enough to be used in the recharging applications for multiple cells, but neither considers both frequency and duty cycle factors simultaneously.…”

Section: Pulse-based Charging Algorithmmentioning

confidence: 99%

Pulse-Based Fast Battery IoT Charger Using Dynamic Frequency and Duty Control Techniques Based on Multi-Sensing of Polarization Curve

2016

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Abstract:The pulse-based charging method for battery cells has been recognized as a fast and efficient way to overcome the shortcoming of a slow charging time in distributed battery cells, which is regarded as a connection of cells such as the Internet of Things (IoT). The pulse frequency for controlling the battery charge duration is dynamically controlled within a certain range in order to inject the maximum charge current into the battery cells. The optimal frequency is determined in order to minimize battery impedance. The adaptation of the proposed pulse duty and frequency decreases the concentration of the polarization by sensing the runtime characteristics of battery cells so that it guarantees a certain level of safety in charging the distributed battery cells within the operating temperature range of 5-45 • C. The sensed terminal voltage and temperature of battery cells are dynamically monitored while the battery is charging so as to adjust the frequency and duty of the proposed charging pulse method, thereby preventing battery degradation. The evaluation results show that a newly designed charging algorithm for the implemented charger system is about 18.6% faster than the conventional constant-current (CC) charging method with the temperature rise within a reasonable range. The implemented charger system, which is based on the proposed dynamic frequency and duty control by considering the cell polarization, charges to about 80% of its maximum capacity in less than 56 min and involves a 13 • C maximum temperature rise without damaging the battery.

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Section: Pulse-based Charging Algorithmmentioning

confidence: 99%

Pulse-Based Fast Battery IoT Charger Using Dynamic Frequency and Duty Control Techniques Based on Multi-Sensing of Polarization Curve

2016

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“…Kirchhoff's voltage law is used to define the C-E voltage as follows (21) where the I c can be linearly adjusted based on the rising voltage V cb . Kirchhoff's voltage law is used to define the C-E voltage as follows (21) where the I c can be linearly adjusted based on the rising voltage V cb .…”

Section: Design Of Bi-phase Charging Controllermentioning

confidence: 99%

“…Without considering the charging temperatures, this charging method can be adopted to achieve fast charging of the Li-ion batteries. Therefore, this charging process has been mentioned in [19][20][21] to explain the applicable situations for the rechargeable batteries. However, the Li-ion battery is charged or discharged at the low temperatures, it has a slow rate of the electrochemical reaction with a poor ionic conductivity of the electrolyte.…”

Section: Constant Current and Constant Voltage Controlmentioning

confidence: 99%

“…650 < V cb < 900 mV: The BJT is operated in the active mode. Kirchhoff's voltage law is used to define the C-E voltage as follows (21) where the I c can be linearly adjusted based on the rising voltage V cb . For this reason, a equivalent dynamic resistance (DR) is proportional to the rate of the (V CE /I c ) in the C-E terminal as…”

Section: Design Of Bi-phase Charging Controllermentioning

confidence: 99%

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Implementation and design of high‐power fast charger for lithium‐ion battery pack

Pai

Chien

Hsieh

et al. 2013

Circuit Theory & Apps

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The high-power fast charger (HPFC) incorporating a power stage with a controlling loop is presented in this paper. A power stage is composed of an inter-leaved boost power factor correction and a DC-DC full-bridge phase-shifted (FBPS) converter, and that the HPFC can supply a constant-voltage (CV) or a constant-current (CC) power to charge a secondary lithium-ion battery pack. In addition, the ripple current can be reduced due to the DC-DC FBPS converter combines with the current-doubler rectifier at HPFC's output side. Also, the controlling loop is equipped with a voltage compensator and a current compensator, and this design is for the sake of HPFC, which can either operate in CV or CC output mode. Moreover, the shut-down situation will be prevented by proposed bi-phase charging controller, when the charging current is adjusted from the fist CC level to the second CC level. Analysis and design considerations of the proposed circuits are presented in details. Experimental results agree well with the theoretical predictions and confirm the validity of the proposed approach. Figure 18. A photo of the proposed HPFC for Li-ion battery pack.Figure 17. Efficiency at different output power.Figure 16. Waveforms of the BPC 2 for HPFC; (V a2 : 10 V/div, V cb : 1 V/div, I o : 20 A/div, Time: 10 ms/div). IMPLEMENTATION AND DESIGN OF HIGH-POWER FAST CHARGER FOR LITHIUM ION

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“…Liion battery is one of the most promising solutions for these storage systems because of its outstanding electrochemical performance and high capacity. Lithium iron phosphate (LiFePO 4 or LFP), one of the very popular commercial cathode materials for Li battery, exhibits several advantageous features such as low cost, good environmental compatibility, relatively large capacity, and intrinsic stability [2].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Separator Thickness and Porosity on the Performance of Lithium-Ion Batteries

Kannan

Terala

Moss

et al. 2018

International Journal of Electrochemistry

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In this paper, investigation on the effect of separator thickness and porosity on the performance of Lithium Iron Phosphate batteries are analyzed. In recent years there have been intensive efforts to improve the performance of the lithium-ion batteries. Separators are important component of lithium-ion batteries since they isolate the electrodes and prevent electrical short-circuits. Separators are also used as an electrolyte reservoir which is used as a medium for ions transfer during charge and discharge. Electrochemical performance of the batteries is highly dependent on the material, structure, and separators used. This paper compares the effects of material properties and the porosity of the separator on the performance of lithium-ion batteries. Four different separators, polypropylene (PP) monolayer and polypropylene/polyethylene/polypropylene (PP/PE/PP) trilayer, with the thickness of 20 μm and 25 μm and porosities of 41%, 45%, 48%, and 50% were used for testing. It was found that PP separator with porosity of 41% and PP/PE/PP separator of 45% porosity perform better compared to other separators.

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Ultra fast charging system on lithium ion battery

Cited by 13 publications

References 1 publication

Pulse-Based Fast Battery IoT Charger Using Dynamic Frequency and Duty Control Techniques Based on Multi-Sensing of Polarization Curve

Pulse-Based Fast Battery IoT Charger Using Dynamic Frequency and Duty Control Techniques Based on Multi-Sensing of Polarization Curve

Implementation and design of high‐power fast charger for lithium‐ion battery pack

Analysis of the Separator Thickness and Porosity on the Performance of Lithium-Ion Batteries

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