source:Industry News
release time:2023-03-24
Hits:0
Popular:
Although in different charging states, compared to other positive materials, the thermal stability of LifePO4 is the best, but over -charging will also cause the unsafe hidden dangers of the LifePO4 power battery during use. In the state of overcharging, solvents in the electrolytes are more prone to oxidation and decomposition. Will ethylene carbonate (EC) in common organic solvents give priority to oxidation and decomposition on the positive surface. Due to the low lithium -mochemical (lithium battery level) of the lithium lithium, there is a great possibility of lithium in the precipitation of the lithium litter. One of the main reasons for the failure of the battery under the condition of over -charged is the internal short circuit caused by lithium crystal branches. The failure mechanism of lithium -plating lithium plating caused by over -charged the surface of the lithium plating on the surface of the lithium plating shows that the overall structure of graphite's negative electrode has not changed, but there are lithium crystal branches and the emergence of the surface mask, and the reaction of lithium and electrolytes will increase. More active lithium also makes the lithium spread to the negative electrode of the stone tools more difficult. In turn, it will further promote the deposition of the lithium on the negative surface, resulting in further reduction of capacity and Kulun efficiency. In addition, metal impurities (especially Fe) are usually considered one of the main reasons for battery failure. Lithium phosphate iron batteries have theoretical possibilities in theory when the oxidation and reduction of FE is theoretically possibly when charging/discharge cycle, and a reaction mechanism is given: when it is overcharged, the FE first oxidize to Fe2 ﹢, FE2 ﹢ further oxidize to Fe3 ﹢, and then FE2 f and Fe3 ﹢ spread from the side of the positive pole to the side of the negative electrode. FE3 ﹢ was finally restored into Fe2 ﹢, FE2 ﹢ further restores to form Fe; when the charging/discharge cycle, the FE crystal branch will be formed at the same time and the negative electrode at the same time, and will stab The formation of the FE bridge through the septum causes the micro -short circuit of the battery. The obvious phenomenon of the micro -short circuit of the battery is that the temperature continues to rise after the overload. At the time of discharge, the negative electrode potential will rise rapidly, and the increase in the potential will cause damage to the SEL membrane on the negative surface (the part -rich part of the inorganic compound in the SEL membrane is easier to oxidize), which will cause additional decomposition of the electrolyte , Resulting in capacity loss. More importantly, the oxidation of the negative episodes of the fluid CU box will occur. The oxidation product CUO in the negative SEI film will cause an increased battery resistance and cause the battery capacity loss. HE and other four studied the over -discharge process of the LIFEPO4 power battery in detail. The research results show that the negative episodes can be oxidized into CUR when discharge. CU ﹢ is further oxidized to CU*. Restore reaction CU c → Cu →
Read recommendations:
lithium batteries for boats price
12V Rechargeable Lithium Ion 18650 Battery Pack 2000mAh
Last article:Battery customization.lithium marine batteries company
Next article:What are the advantages and disadvantages of lithium titanate batteries?lithium trolling motor battery manufacture
related suggestion
solar battery storage system manufacturer
2023-04-07lithium ion golf cart batteries wholesaler
2023-03-22deep cycle marine battery Processor
2023-03-20lithium deep cycle marine battery Factory
2023-03-22lithium ion golf cart batteries price
2023-03-22lifepo4 solar battery direct sales
2023-04-0736 volt golf cart batteries
2023-05-08best solar powered generator
2023-05-08solar generator price
2023-05-08power station solar
2023-05-08dual purpose marine battery
2023-05-0812v 100ah battery
2023-05-08High Voltage 20kwh 30kwh 40kwh 100kwh Lithium Ion Battery 192V 380V For Solar Energy Storage System
2023-02-09Wall Mount Rack Home Energy Battery Pack 16S2P 51.2V 100Ah Cylindrical Cell
2022-10-19Golf Cart 51.2V 150Ah LiFePo4 Battery Pack
2022-09-29Explosion Proof Rechargeable Lithium Special Battery Cell 26650 32700
2023-02-14High Discharge 18650 21700 26650 Lithium Ion Battery Cell
2022-10-14What are the technical requirements for the main parameters of soft pack lithium batteries?solar generator for home
2023-08-25What are the main characteristics of lithium-ion batteries?lithium ion golf cart batteries
2023-06-21Development trend of 3C lithium battery in the future
2022-12-12What are some ways to extend the life of your home battery?
2022-10-28Balanced principle of battery pack
2023-02-15What is the structure of lithium ion battery?
2023-02-14Reasons for self discharge of 3C lithium battery
2022-12-10For a long time for high Lithium batteries, be sure to pay attention to the following four points.12v deep cycle marine battery
2023-06-17Zinc silver battery.portable solar power generator
2023-08-14Recommended car model battery recommendation.lithium trolling motor battery Processor
2023-04-24