The operating or storage temperature affects the battery's performance [15], [16], [17]. Typically LiBs operate in a temperature range between 15 °C and 35 °C to perform optimally and secure a long cycle life [18], [19], [20], [21], [22]. However, during operation, a considerable amount of heat, especially at high rates, can be generated from the cell. This can significantly speed up the temperature elevation [22], [23] and accentuate the temperature non-uniformity when batteries are stacked in modules or packs [24], [25] or cooled inefficiently [26]. If the heat is not successfully evacuated or if the temperature is not optimally controlled via a battery thermal management system (BTMS) [27], [28], [29], this can lead to the battery’s temperature exceeding the safety temperature range, above which the cell’s components decompose and result in exothermic reactions, ultimately leading to safety accidents involving thermal runaway (TR), smoke and even fire [30], [31].
TR occurs when a LiB is in an internal failure state caused by uncontrolled electrochemical reactions [32]. These exothermic electrochemical reactions are influenced by two main factors: temperature and voltage [33], [34]. They can be triggered when a cell is used outside its normal operating range and is exposed to extreme abuse conditions. These conditions can be classified into three categories: electrical [35], [36], thermal [37], [38] and mechanical abuse
Safety issues
Generally, when a LiB operates a considerable amount of heat is generated from three main sources: the polarization heat, the reversible heat and the joule heat [61]. The higher charging or discharging rate, the more heat the battery generates [85] which leads to an increase in the internal temperature of the cell. This can be detrimental since fast charging has become a very important factor to be considered for battery development and safety
Do not fit this battery to a boat application i would class this as insanity. lithium battery in any boat, its critical regardless of the chemistry that the BMS is robust and preferably it be a fully managed type although the self managed battery of reputable brand would be ok and lithium iron phosphate is best Chemistry, in saying that it still vulnerable under incorrect charging.Being I have very little current draw but want lots of capacity why not an old Tesla battery?
Tesla Model S X 100kWh 6.4kWh Battery Module Cell 24V 287Ah 1086755-00-D
First I look at safety. If it is cheap but unsafe I would not go anywhere near it.First I look at the purse. What does it cost?
That's certainly what everyone thinks, but there is zero evidence to say it's true, and none of the investigations came to that conclusion.“I personally wouldn't want anything other than LFP on my boat for anything larger than a power drill battery.”
Well said. Unfortunately it was likely nothing more than a cell phone which took out the Conception and 3 dozen divers/guests.
It's not that they're unstable when permanently mounted. The concern is that failures, while rare, can be truly catastrophic. And failure can come from mechanical stress, corrosion or water infiltration as well as poor management.A couple of years ago Tesla batteries were the go to solution for people building their own solar storage. Don't remember anyone mentioning the batteries being unstable. Management is the biggest problem cited by beginners.
Several EV manufacturers have switched over to LFP. It's got a big price advantage over LI now.Luckily, it turns out that LFP batteries are just like laptops, TVs and any other electronic - they keep dropping in price, and with increasing usage/supply, they keep dropping in price even more.
Not sure, but i guess the other advantages outweigh the weight penalty in lots of mass market applications. IIRC Tesla uses LFP now for their Asian built cars.That’s interesting, @Jeff F, do you have an indication of what the difference in energy density is?
becouse NCA battery is danger,special on boat.Being I have very little current draw but want lots of capacity why not an old Tesla battery?
Tesla Model S X 100kWh 6.4kWh Battery Module Cell 24V 287Ah 1086755-00-D
I get that!!First I look at the purse. What does it cost?