scholarly journals Establishment of transition point in operating mode for Constant Current Constant Voltage (CC-CV) charging of Li-ion batteries

2021 ◽  
Vol 3 (1) ◽  
pp. 072-083
Author(s):  
Amit Kumar De ◽  
Shobhana Dey
Keyword(s):  
Transition Point ◽  
Operating Mode ◽  
Constant Current ◽  
Li Ion Batteries ◽  
Constant Voltage ◽  
Long Run ◽  
Charging Mode ◽  
Li Ion ◽  
Constant Current Charging ◽  
Safety Considerations

The present-day Li-ion batteries when operated, needs precise monitoring of the charging voltage. Several charging techniques have been tested so far with varying degrees of success. One of the most widely used charging techniques is the CC-CV (constant current constant voltage) charging. When performing this, the safety considerations must be maintained with respect to over voltage charging which is a very common problem during constant current charging. In order to prevent over voltage charging, the charging mode must be then shifted from CC to CV mode. So, this transition point of the charging mode from CC to CV is very crucial for the safe operation and health of the battery in the long run. The problem is that, this transition point doesn’t remain the same for the battery. So, in this paper the factors on which it depends are discussed and a Li-ion battery was charged in a few different charging rates using the CC-CV technique to demonstrate the process.

HOMOGENITAS PRODUKSI BATERAI ION LITIUM BERDASARKAN VARIANS KAPASITAS PENGISIAN, KAPASITAS PELEPASAN DAN EFISIENSI PENGISIAN-PELEPASAN

2016 ◽  
Vol 6 (1) ◽  
pp. 35
Author(s):  
Daniel Fajar Puspita ◽  
Susanto Sigit Rahardi
Keyword(s):  
Constant Current ◽  
Constant Voltage ◽  
Constant Current Charging

Penelitian  mengenai  stabilisasi  produksi  baterai  ion  litium  berdasarkan  parameter  kapasitas  pengisian, kapasitas pelepasan  dan  efisiensi  pengisian-pelepasan  telah  dilakukan. Tujuan  dari penelitian  ini adalah  untuk mengetahui apakah prosedur pembuatan baterai ion litium ini dapat menghasilkan produk yang homogen. Pada penelitian material selanjutnya hal ini berguna untuk meyakinkan bahwa perubahan kualitas   dari produk baterai yang dihasilkan merupakan pengaruh dari material, bukan karena variabel proses perakitan. Pada penelitian ini dipakai lembaran elektroda siap pakai untuk meniadakan pengaruh variasi bahan baku terhadap kualitas sel baterai yang dihasilkan. Sel baterai dibuat di laboratorium riset baterai B4T. Baterai dibuat sebanyak 3 batch dengan jumlah baterai 8 buah setiap batch. Baterai yang dihasilkan diuji dengan alat battery analyzer merek Berkeley buatan USA dengan arus 0,5 C pada saat constant-current charging dan voltase 4,2 V sewaktu constant-voltage charging selama 10 siklus pada saat uji kinerja  dan arus 0,1 C pada saat pengisian  awal.  Hasil yang didapat adalah  batch C menghasilkan sel-sel baterai yang lebih homogen yang ditandai dengan nilai varians dan simpangan baku yang paling kecil dibandingkan batch lainnya.  Selain itu pada saat uji pengisian-pelepasan  10 siklus, batch C juga memperlihatkan kinerja yang lebih tinggi. Hal ini menunjukkan bahwa proses yang dipakai pada batch C dapat menghasilkan sel baterai ion litium berkinerja baik dan homogen.Kata kunci: stabilisasi produksi, ion litium, kapasitas, efisiensi

scholarly journals PSO-based optimization for constant-current charging pattern for li-ion battery

2019 ◽  
Vol 5 (2) ◽  
pp. 72-78 ◽  
Author(s):  
Yixiao Wang ◽  
Yong Li ◽  
Li Jiang ◽  
Yuduo Huang ◽  
Yijia Cao
Keyword(s):  
Constant Current ◽  
Li Ion Battery ◽  
Li Ion ◽  
Constant Current Charging

A new charging mode of Li-ion batteries with LiFePO4/C composites under low temperature

2010 ◽  
Vol 104 (2) ◽  
pp. 561-567 ◽  
Author(s):  
Xiao Wei Zhao ◽  
Guo Yu Zhang ◽  
Lin Yang ◽  
Jia Xi Qiang ◽  
Zi Qiang Chen
Keyword(s):  
Low Temperature ◽  
Li Ion Batteries ◽  
Charging Mode ◽  
Li Ion

Fabrication and Characterization of Nanocrystalline NiO Prepared by Sol-Gel Process

2011 ◽  
Vol 194-196 ◽  
pp. 476-479
Author(s):  
Yu Cai ◽  
Zhao Yang Wu ◽  
Shen Li Zhao ◽  
Ji Ne Zhu
Keyword(s):  
Crystal Structure ◽  
Sol Gel ◽  
Chelating Agent ◽  
Constant Current ◽  
Treatment Technology ◽  
Sol Gel Process ◽  
Stable Performance ◽  
Li Ion ◽  
Constant Current Charging

The nano-NiO powder was prepared by sol-gel method combining heat treatment technology and its structure and morphology were explored. In addition, the NiO powder electrochemical properties were tested by constant current charging and discharging. The results show that the stable performance sol can be composed by nickel acetate as source of nickel and PAA as chelating agent. Nano-NiO powder of crystal structure integrity, particle uniformity can be prepared by the sol. The gel decomposes completely and gradually forms nanocrystal at 430οC. Its grain size is gradually increasing when the annealing temperature rise. The nano-NiO powder sintered at 600°C exhibits uniform particle, integrity crystal structure, low aggregation and superior electrochemistry performance and may be used in Li-ion battery as the anode material.

30A/60V Electric Car Charger Control Circuit Simulation

2014 ◽  
Vol 971-973 ◽  
pp. 950-953
Author(s):  
Ying Chun Liu ◽  
Jian Ming Zhang ◽  
De Long Zhang ◽  
Yan Yu Wang ◽  
Chun Guang Hou ◽  
...  
Keyword(s):  
Operational Amplifier ◽  
Circuit Simulation ◽  
Characteristic Curve ◽  
Rechargeable Batteries ◽  
Current Control ◽  
Control Circuit ◽  
Constant Current ◽  
Constant Voltage ◽  
Op Amp ◽  
Charging Mode

Through analysis and comparison of existing charging method works , adding more links constant current charging and constant voltage charging on the basis of the three-stage charging mode is proposed to receive more in line with rechargeable batteries five-phase characteristic curve charging mode. By scaling the control circuit and the PI regulator circuits use the charging current value and the constant voltage is sampled , a constant voltage corresponding to the error value to be compared and outputs the PWM control chip SG3525, causing the output current of the front end circuit chip , the regulation voltage , the error is gradually reduced until it reaches the steady-state output . 1 key components - integrated operational amplifier selection Integrated operational amplifier control circuit for the main components , essentially the entire op-amp circuits are designed to carry around , so choose the op amp circuit is particularly important . From the foregoing analysis, the current control and voltage control portion of each part requires three op amp ( both as an amplifier , a PI controller is used ) , the entire control circuit requires access to six integrated amplifier . Out of circuit integration considerations, decided to use a quad op amp manifold and a dual op amp with the completion of the manifold . By screening and the corresponding parameters available on the TI (TEXAS INSTRUMENTS TI ) website , and ultimately determine the use of quad op amp LF347 and dual op amp TLC2272.

scholarly journals Pengaruh Beban dan Filter pada Penyearah AC-DC Terkendali untuk Rangkaian Pengisi Li-ion Berbasis Bridge Rectifier dan Buck Converter Menggunakan Metode CC/CV

2021 ◽  
Vol 9 (1) ◽  
pp. 88-98
Author(s):  
Alif Pradana Hakim ◽  
Sena Sukmananda Suprapto ◽  
Mifta Nur Farid
Keyword(s):  
Direct Current ◽  
Duty Cycle ◽  
Alternating Current ◽  
Buck Converter ◽  
Constant Current ◽  
Rectification Ratio ◽  
Constant Voltage ◽  
Bridge Rectifier ◽  
Li Ion

Saat ini, banyak perangkat elektronik yang menggunakan baterai sebagai sumber dayanya seperti handphone dan laptop. Sebuah charger baterai yang bersumber AC (Alternating Current) memiliki sebuah penyearah AC ke DC (Direct Current). Keluaran penyearah AC-DC tidak sesuai untuk pengisian CC/CV (Constant Current/Constant Voltage), sehingga diperlukan buck converter untuk menghasilkan nilai yang diinginkan. Selain itu, penyearahan AC-DC membawa ripple yang dapat merusak baterai dan mempengaruhi rectification ratio (RR), sehingga memerlukan filter untuk mengurangi ripple dan meningkatkan rectification ratio. Percobaan dilakukan pada kondisi arus konstan atau CC 1,5A dan kondisi tegangan konstan atau CV 4,2V menggunakan variasi beban. Pada percobaan CC, diketahui bahwa peningkatan beban akan menyebabkan peningkatan duty cycle yang dibutuhkan. Pada uji coba CV, diperoleh hasil bahwa peningkatan beban menyebabkan pengurangan duty cycle yang dibutuhkan. Penggunaan filter pada kondisi CC dan CV dapat mengurangi ripple dan meningkatkan RR. Pada kondisi CC, ripple matematis, simulasi, dan uji coba secara berturut-turut berkurang 46,45%, 46,43%, dan 45,46%. RR matematis, simulasi, dan uji coba secara berturut-turut meningkat 18,17%, 18,17%, dan 21,59%. Pada kondisi CV, ripple matematis, simulasi, dan uji coba secara berturut-turut berkurang 46,44%, 46,6%, dan 48,78%. RR matematis, simulasi, dan uji coba secara berturut-turut meningkat 18,17%, 18,17%, dan 20,99%. Pengisian Li-ion 3Ah memakan waktu 4 jam 58 detik. Dimana pengisian CC selama 32 menit 10 detik dan pengisian CV selama 3 jam 28 menit 48 detik. Pada pengisian CC duty cycle meningkat saat terjadinya peningkatan tegangan baterai. Sedangkan pada pengisian CV, duty cycle menurun saat berkurangnya arus pengisian.

scholarly journals A new high speed charge and high efficiency Li-Ion battery charger interface using pulse control technique

2022 ◽  
Vol 12 (2) ◽  
pp. 1168
Author(s):  
Mustapha El Alaoui ◽  
Karim El Khadiri ◽  
Rachid El Alami ◽  
Ahmed Tahiri ◽  
Ahmed Lakhssassi ◽  
...  
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Control Technique ◽  
Constant Current ◽  
Li Ion Battery ◽  
Pulse Control ◽  
Battery Charger ◽  
Small Surface ◽  
Charging Mode ◽  
Li Ion

A new Li-Ion battery charger interface (BCI) using pulse control (PC) technique is designed and analyzed in this paper. Thanks to the use of PC technique, the main standards of the Li-Ion battery charger, i.e. fast charge, small surface area and high efficiency, are achieved. The proposed charger achieves full charge in forty-one minutes passing by the constant current (CC) charging mode which also included the start-up and the constant voltage mode (CV) charging mode. It designed, simulated and layouted which occupies a small size area 0.1 mm2 by using Taiwan Semiconductor Manufacturing Company 180 nm complementary metal oxide semi-conductor technology (TSMC 180 nm CMOS) technology in Cadence Virtuoso software. The battery voltage VBAT varies between 2.9 V to 4.35 V and the maximum battery current IBAT is 2.1 A in CC charging mode, according to a maximum input voltage VIN equal 5 V. The maximum charging efficiency reaches 98%.

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