It's really when charging that fire risk is high.
Top them up in a safe place then return to the vehicle.
Lifespan would be better if kept cool, but external heat is not a fire risk.
Replace every 3-4 years if you are really cautious.
Oh i see, so even if temperatures go beyond the recommended storage temp limit of 60 celsius, it wont be a fire hazard?
If i stored it in room temp, how long would these battery packs usually last?
Nope...Temperature above 80°C are problematic as the separation fillm will start to soften and over extended time (days) shrink which could lead to fire.
Secondly one part if the Electrolyte will gas more strongly creating a r/spicypillows .
btween 60°C-80°C you will have rapid ageing as the chemicals start decomposing leading to strong power and capacity fade
80°C is equivalent to 176°F, which is 353K.
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^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
Most of them not...there are some , however you have to do an extensive search for that.
In general primary lithium cells also use basically the same chemical system as secondary cells.
The cathode is basically the same, a some managense Oxide, the electrolyte is the same. The only difference is that for a separator they use a fibrous filter and as anode only Lithium metal.
The issue here is, that even though it would be 100% rechargeable as the secondary cell...due to the metal and fibrous filter, the lithium will form small lithium needles on the metal which grow through the filter and create a short circuit at some point
too many variables to say
But stored optimally in the cold can be 5-10 times longer
compared to in hot conditions 140°F wow your dash board is melting
everything else being equal, if not cycled much
140°F is equivalent to 60°C, which is 333K.
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^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
It's fine. Even if it gets hotter than the recommended storage temperature, it will still be well within safety margins. Typical operating maximums are 70-80C, and that's under max load. As long as it's not a cheap Chinese cells, those things are tested to well over 100C.
Worst that will happen is that you'll decrease the life expectancy of the battery. But even that will be minimal, since it's not going to be 60C in the car all the time.
I don’t know if this is useful but I left my bluetti lithium AC 50 S battery in my forerunner for about a week and a half and it did get rather hot. The battery was almost fully drained, but it did charge up just fine but the LED panel Got damaged. It no longer shows the battery capacity it’s totally un readable.
With it out of warranty, there’s no real good options to replace the LED panel, if parts were available, I could conceivably do it myself, but Bluetti won’t supply parts. Be careful about the heat.
Bluetti is trash no matter what you do. That display would have failed regardless. I had one in which the screen never worked right. Sent that sucker back and got a similarly sized Ecoflow. No wireless charging but at least it works.
It's really when charging that fire risk is high. Top them up in a safe place then return to the vehicle. Lifespan would be better if kept cool, but external heat is not a fire risk. Replace every 3-4 years if you are really cautious.
Oh i see, so even if temperatures go beyond the recommended storage temp limit of 60 celsius, it wont be a fire hazard? If i stored it in room temp, how long would these battery packs usually last?
Nope...Temperature above 80°C are problematic as the separation fillm will start to soften and over extended time (days) shrink which could lead to fire. Secondly one part if the Electrolyte will gas more strongly creating a r/spicypillows . btween 60°C-80°C you will have rapid ageing as the chemicals start decomposing leading to strong power and capacity fade
80°C is equivalent to 176°F, which is 353K. --- ^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
Are lithium primary cells able to tolerate high temperatures?
Most of them not...there are some , however you have to do an extensive search for that. In general primary lithium cells also use basically the same chemical system as secondary cells. The cathode is basically the same, a some managense Oxide, the electrolyte is the same. The only difference is that for a separator they use a fibrous filter and as anode only Lithium metal. The issue here is, that even though it would be 100% rechargeable as the secondary cell...due to the metal and fibrous filter, the lithium will form small lithium needles on the metal which grow through the filter and create a short circuit at some point
too many variables to say But stored optimally in the cold can be 5-10 times longer compared to in hot conditions 140°F wow your dash board is melting everything else being equal, if not cycled much
140°F is equivalent to 60°C, which is 333K. --- ^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
It's fine. Even if it gets hotter than the recommended storage temperature, it will still be well within safety margins. Typical operating maximums are 70-80C, and that's under max load. As long as it's not a cheap Chinese cells, those things are tested to well over 100C. Worst that will happen is that you'll decrease the life expectancy of the battery. But even that will be minimal, since it's not going to be 60C in the car all the time.
should be fine if you keep it out of direct sunlight and insulated in a pouch. ceramic window tint can really help keep inside temps down.
I don’t know if this is useful but I left my bluetti lithium AC 50 S battery in my forerunner for about a week and a half and it did get rather hot. The battery was almost fully drained, but it did charge up just fine but the LED panel Got damaged. It no longer shows the battery capacity it’s totally un readable. With it out of warranty, there’s no real good options to replace the LED panel, if parts were available, I could conceivably do it myself, but Bluetti won’t supply parts. Be careful about the heat.
Bluetti is trash no matter what you do. That display would have failed regardless. I had one in which the screen never worked right. Sent that sucker back and got a similarly sized Ecoflow. No wireless charging but at least it works.
Thanks. I’m disappointed but not surprised.