Humidity sensor and wet rugs in the Fiat 500e. Many people that come to our Electric Cars Service have problems with moisture in the interior of the Fiat 500e. Some have even wet passenger or driver rugs. Sometimes there is a musty smell inside the Fiat 500e.
Why is moisture control inside the Fiat 500e so important?
The reason is very simple and certain. Electric Fiat 500, like any electronic device, simply does not like water. Condensing moisture can literally flood the PCB with hundreds of drops of water. As you know, water is a great electrical conductor. It also promotes corrosion of connections on PCBs. In my opinion, moisture is the beginning of the problems with the CTM module, responsible for the Fiat 500eBlue&Me. But the most important reason is the flap hidden just under the rear seat, leading directly to the inside of the Fiat 500e HV Battery
Cause of dead humidity sensor and wet rugs in the Fiat 500e?
Cause of dead humidity sensor it may seem ridiculous, but it is moisture itself. Wet rugs in the Fiat 500e? Most often they have their cause on the windshield. Irrationally again. Well, no, a badly designed drain from the windshield glass causes most of the problems described above. It is not enough that the water from the glass goes straight to the air conditioning tube leading to the cabin exchanger. Additionally, the water drain, clogged with leaves or needles, causes the water to slowly seep for hours after the rain.
Humidity sensor and wet rugs in the Fiat 500eHumidity sensor and wet rugs in the Fiat 500eHumidity sensor and wet rugs in the Fiat 500eHumidity sensor and wet rugs in the Fiat 500eHumidity sensor and wet rugs in the Fiat 500e
Convert 500e Radio to European settings means changing the frequency hop of the Fiat 500e Radio. Thus excluding support for geostationary satellites over the States called Sirius
Convert 500e Radio to European settings Instructions:
To perform this operation You’ll need High Quality OBD tool like OBDlink MX+ WiFi and Full registered version of MuliEcuScan 4.6 and up.
Lithium Battery bests practices by Peter Wolf. How to prevent Li-Ion battery for loosing SOH and ageing? How to not visitHV Battery service. Sorry for the mistakes, I will work on it
I have started my adventure with lithium batteries about 20 years ago, as a RC modeler. Lithium batteries that we used in flying models, unlike laptop batteries, were designed for maximum current, delivered in a very short time. Thanks to this I gained experience with the most well-fed Lithium batteries in the world. Batteries that I use for acrobatic or racing models are able to temporarily spend up to 100 times more current than the nominal capacity. What does it mean? For example, use a small battery used in 250 class acrobatic drones with a capacity of 1300mAh on 14.8V what means 4 cells per 3.7V nominal.
Next to the capacity, a thick 75C inscription appears, marked with a black background. This means that, we can temporarily pull the current ,75 times larger than its capacity. That is 75 * 1300mA = 97 500 mA. Almost 98Amps on 15V what gives 1470W from a battery not much bigger than a matchbox.
Lithium Battery bests practices
100% SOC is actually 100% capacity of our battery and 0% is 0%
In your mobile phone for 99,99% it is. that’s why a mobile phone battery lasts only for two years. 100% for 4.2V(or even higher to 4.35V) and 0% for 3V.
Lithium Battery bests practices
In most EV vehicles, the original cell capacity is degreed for longer battery life. And for example Fiat 500e’s 100% SOC is equal to ~4110mV/cell and 0% is around ~ 3300mV/cell
Lithium Battery bests practices important notice: Lithium battery haven’t ‘memory effect’. There is no sense to discharge them to 0% and then full charge.
Charge Voltage Limit and Discharge cycles
Charge Voltage Limit is also very important. Every reduction of 0.1V in max cell/voltage double the battery cycles. Every 0.07V (70mV) drops the usable capacity by ~10%
Charge level V/cell
Discharge cycles
Stored Energy
4.25
200 – 350
105-110%
4.20
300 – 500
100%
4.15
400 – 700
90% to 95%
4.10
600 – 1000
85% to 90%
4.05
850 – 1500
80% to 85%
4.00
1200 – 2000
70% to 75%
3.90
2,400 – 4000
65%
3.80
4000 >
55%
Deeper discharge, shorter life.
Deeper discharge (100% DoD equals to full cycle) = shorter battery life – less battery cycles. Operating the battery in mid-state-of-charge would have beast results.
DoD (Depth of discharge)
Baterry cycles NiCd
Battery cycles LiPO
100% DoD
~300
~600
80% DoD
~400
~900
60% DoD
~600
~1500
40% DoD
~1000
~3000
20% DoD
~2000
~9000
10% DoD
~6000
~15000
Lithium battery charging and balancing
No Lithium battery archive ‘capacity memory effect’ therefore it is not necessary to always discharge to zero and charge to 100%. and it will definitely be better if we don’t charge like that. If you do not use 100% daily, consider setting a charging schedule so as not to recharge the battery every day to 100%. For Lithium Battery bests practices try to keep the limits from 20 to 80% State-of-Charge. You don’t have to worry about the battery being unbalanced. Discharging to zero and charging to 100% has nothing to do with balancing the battery. Fiat 500e balances the HV package whenever it is needed, even during sleep cycle
Fiat 500e HV battery balance data.
Lithium batteries storage
Lithium batteries differ from each other, the additives used, which every manufacturer keeps secret… Lithum Polimer batteries, achieve their incredible performance at the expense of stability and explosive nature. These batteries, whose purpose is to discharge from 100% to zero in 3-4 minutes are extremely sensitive to too low charge or high charge. The only way to store these batteries, as well as all other Lithium batteries, is to charge them to the “magic” STORAGE level of 3.75V – 3.82V per cell (about 50%SOC)
Proper prepared to store Lithium batteries can be stored up to 5 years, almost without degrading the battery SOH (State-of-Health) Remember, or notice the next time, how much charge your new mobile phone has taken straight out of the box?
For any Lithium Battery bests practices, remember, no lithium batteries like to be 0% or 100% too long. And the closer to the center (SOC: 45-50%) the better. Depending on the additives used for the chemical composition and battery pack build. Lithium batteries can only be more or less resistant to too high or too low SOC.
Putting battery in to Storage State requires a special charging mode. it is mainly used for batteries used from time to time such as drones/RC batteris, which we charge to 4.2V / cell just before use.
