Lithium Battery 3.7V Lithium Polymer Battery 3.2V LifePo4 Battery 1.2V Ni-MH Battery Button Coin Battery
3.7V Battery Pack 7.4V Battery Pack 11.1V Battery Pack 14.8V Battery Pack Other Battery Pack
Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
release time:2022-12-29 Hits: Popular:AG11 battery
1. Aging of battery materials
The materials inside the lithium battery mainly include positive and negative active substances, adhesives, conductive agents, collectors, diaphragms and electrolytes. During the use of lithium batteries, these materials will be accompanied by a certain degree of decay and aging. Tang Zhiyuan and others believed that the capacity attenuation factors of lithium manganate battery include: dissolution of cathode material, phase change of electrode material, decomposition of electrolyte, formation of interface facial mask and collector corrosion.
The change mechanism of the positive pole, negative pole and electrolyte of the battery in the cycle was systematically and deeply analyzed. The author believes that the formation and subsequent growth of the negative electrode SEI film will be accompanied by the irreversible loss of active lithium, and the SEI film does not have a real solid electrolyte function. Except for lithium ions, the diffusion and migration of other substances will lead to gas generation and particle breakage. In addition, the change of material volume and the precipitation of lithium metal during the cycle will also lead to capacity loss.
Aurbach et al. disassembled the positive and negative electrode plates of lithium cobaltate battery after cycling at 25 and 40 ℃. SEM, XRD and FTIR test results showed that both positive and negative active materials were lost. Li Yang et al. analyzed the electrical performance of the lithium iron phosphate power battery with 6000 cycles. The capacity retention rate was 84.87%, the AC internal resistance increased by 18.25%, and the DC internal resistance increased by 66%. The author disassembled the recycled battery and conducted performance test and SEM analysis of button type battery respectively. It was found that the performance of the negative electrode material declined rapidly after the cycle. It was believed that the expansion of the negative electrode volume and the thickening of the SEI film were the main influencing factors.
2 Charging and discharging system
The charging and discharging system mainly includes three aspects: charging and discharging mode, magnification and cut-off conditions. In terms of charging mode, American scientist Mas once proposed the concept of optimal charging curve. He believed that the optimal charging current of the battery gradually decreased with the extension of charging time: I=I0e- α t。 Where: I is the charging current that can be received; I0 is the maximum initial current when t=0; T is the charging time; α Is the attenuation constant.
Read recommendations:
The demand for lithium battery market increases sharply
Measures to Reduce the Self-Discharge Rate of Lithium Batteries
Last article:International lithium battery standard
Next article:Cycle life prediction
Popular recommendation
551235 battery wholesaler
2023-03-22401030 lipo battery company
2023-03-22AA Ni-MH battery Product
2023-03-22522749 polymer battery
2023-03-22902030 battery wholesaler
2023-03-22551235 180mAh 3.7V
2022-07-0118650 2400mAh 3.7V
2022-08-19Coin Cell BR 1225
2022-10-15Lithium-ion battery GN200
2022-07-29Lithium Battery GN72100
2022-08-19903242 2500MAH 3.7V
2023-06-10702535 600MAH 3.7V
2023-06-10Lithium Battery LQ12-100
2022-08-199V card-mounted carbon battery 6F22
2023-06-28Coin Battery LR 521
2022-10-1518650 3.7v battery
2023-06-25battery cell 18650
2023-06-25battery aaa alkaline
2023-06-25401030 battery
2023-06-2518650 battery bulk
2023-06-25Lithium Battery Quality Assessment
2024-11-13What are the characteristics of ternary lithium batteries?CR1632 battery
2023-06-20Hazards of overcharging and discharging lithium batteries
2023-06-01Lithium manganate (LiMn2O4).lifepo9 battery for solar energy storage Factory
2023-04-182023 (17th) International Forum on Power Lithium Battery Technology and Industry Development
2023-11-29Lithium ion battery separator structure.battery 18650 rechargeable
2023-07-20Lithium battery recovery.18650 battery 1800 mah
2023-06-09Influencing factors of cycle life
2022-12-29What standards need to be met for customized special low-temperature lithium batteries
2023-08-0118650 li ion rechargeable battery.18650 lithium-ion battery pack production process
2023-10-13