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| Marco:
--- Quote from: jonpaul on January 20, 2024, 05:48:26 pm ---Less efficiency. less capacity by 1/2 for a 10 deg C or F decrease in T. --- End quote --- Nope, reaction speed and reaction efficiency are not related in that way, you're just making it up. Also the theoretical limit for thermal resistance of insulation is infinity, well short of infinity would be good enough. |
| jonpaul:
Arrhenius plots for Li-ion battery ageing as a function of temperature ... Nov 30, 2022Abstract (NCA + LNO) cathode and Si/graphite anode (∼3% Si) and 0.1 Ah lab-made pouch cells with LiNi Mn Co O (NMC111) cathode and a graphite anode. The results of the Arrhenius plots are analysed in the context of C-rate, cell ageing, and electrode properties. https://www.sciencedirect.com › science › article › pii › S0378775323013241 Temperature-driven path dependence in Li-ion battery cyclic aging The 7 % capacity loss during this 35 °C aging is sufficient to shift the onset of Li plating below 20 °C, therefore dramatically increasing the battery life. 4. Conclusions. A total of 36 temperature aging paths in the range of 0 °C-45 °C were investigated by cyclic aging of commercial Li-ion pouch cells. https://www.sciencedirect.com › science › article › pii › S1002007118307536 Temperature effect and thermal impact in lithium-ion batteries: A ... The acceptable temperature region for LIBs normally is −20 °C ~ 60 °C. Both low temperature and high temperature that are outside of this region will lead to degradation of performance and irreversible damages, such as lithium plating and thermal runaway. https://pubs.acs.org › doi › 10.1021 › acsenergylett.9b00663 Temperature Considerations for Charging Li-Ion Batteries: Inductive ... The Arrhenius equation ... Effect of Temperature on the Aging rate of Li Ion Battery Operating above Room Temperature. Leng, Feng; Tan, Cher Ming; Pecht, Michael ... Monte Carlo assisted sensitivity analysis of a Li-ion battery with a phase change material. Journal of Energy Storage 2021, 35 , 102269. https://iopscience.iop.org › article › 10.1149 › 1945-7111 › ab6c56 Understanding Adverse Effects of Temperature Shifts on Li-Ion Batteries ... Understanding Adverse Effects of Temperature Shifts on Li-Ion Batteries: An Operando Acoustic Study. Wesley Chang 7,8,1,2,3, ... To carefully demonstrate the Arrhenius relation of these ... Tan C. M. and Pecht M. 2015 Effect of temperature on the aging rate of li ion battery operating above room temperature Sci. Rep. 5 12967. Go to reference in ... https://www.researchgate.net › publication › 363866213_Arrhenius_plots_for_Li-ion_battery_ageing_as_a_function_of_temperature_C-rate_and_ageing_state_-_An_experimental_study Arrhenius plots for Li-ion battery ageing as a function of temperature ... Nov 1, 2022Arrhenius plots for Li-ion battery ageing as a function of temperature, C-rate, and ageing state - An experimental study November 2022 DOI: 10.1016/j.jpowsour.2022.232129 CC BY 4.0 Authors:... https://iopscience.iop.org › article › 10.1149 › MA2022-023352mtgabs Ageing Rate of Li-Ion Battery Cells As a Function of Temperature, C ... Oct 9, 2022Ageing Rate of Li-Ion Battery Cells As a Function of Temperature, C-Rate, and State of Health ... of the two Arrhenius slopes denotes a transition between the dominating ageing mechanism and also denotes the optimum temperature at which the battery cell has the highest service life. ... Arrhenius plots based on ageing rate for (a-e) commercial ... https://www.mdpi.com › 2076-3417 › 8 › 10 › 1786 Evaluation of Present Accelerated Temperature Testing and Modeling of ... Battery manufacturers and device companies often test batteries at high temperature to accelerate the degradation process. The data collected from these accelerated tests are then used to determine battery performance and reliability over specified nominal operating temperatures. In many cases, companies assume an Arrhenius model, or prescribe a decade rule to conduct the data analysis. https://ui.adsabs.harvard.edu › abs › 2022JPS...54932129K › abstract Arrhenius plots for Li-ion battery ageing as a function of temperature ... The V-shape of the Arrhenius plots signifies the crossover between the two dominating ageing mechanisms - solid electrolyte interphase (SEI) growth in the high temperature range and lithium deposition in the low temperature range. https://www.semanticscholar.org › paper › Arrhenius-plots-for-Li-ion-battery-ageing-as-a-of-–-Kučinskis-Bozorgchenani › 64e37bc2d9384180744d9b83ff7f0ea588662b62 Arrhenius plots for Li-ion battery ageing as a function of temperature ... Nov 1, 20222024 Estimation of the representative temperatures of a typical electrochemical battery cell when cooling under natural convection conditions G.V. Kuznetsov E. V. Kravchenko Engineering, Physics Journal of Energy Storage 2023 |
| coppercone2:
lion battery likes around 50-60c |
| Marco:
So many links, so much quoting ... ctrl-f for efficiency, zero results. |
| coppercone2:
someone told me its lowest esr at like 60c. I think I notice it before too it feels like sometimes when the drill batteries get hot some power tools have a really heavy torque . Like when you run a small drill on overload with a big hole saw. jam jam jam but if you finally get it hot you get a hole same thing with my cutoff wheel tool, when its cold you can easily get a jammed blade. But keep trying and when the battery feels hot you can get through a plate thats buckling a little and pressing on the blade and being a PITA. It seems the hot batteries provide enough juice to keep the wheel spinning and grind away the slight deflection that crushes it. I think I notice it the most with a M12 power drill and the M12 cutoff wheel and the variable speed 20v dewalt deburring tool. Angle grinders running flap disks too but usually if you have skill you won't stall those or benefit from the lower ESR if you got the light touch with the grinder. But for hole saws and linear abrasive cutting the extra current makes or breaks the tool. You can't really use skill to overcome a problem like slight pressure from the deflection or just bulk friction from hole saws. That is usually a question of impossible fixturing or just plain luck. |
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