Thursday, February 28, 2013

Renault Zoé - 4 New Videos !

TechnologicVehicles has psoted 4 new videos on the Renault ZOE

2013 series Renault Zoé - dynamic

2013 series Renault Zoé - charging

2013 series Renault Zoé - static exterior shots

2013 series Renault Zoé - interior

Flooded i-Miev: A Close Look at a BMS Board

Look how complex this 3 cells BMS is on the i-MiEV ...

- Is this really necessary ? (See Jack Rickard's thoughts on this)
- How much cheaper would electric cars be without this kind of electronics ?

"We take a close look at a battery management board from a four-pack of lithium cells pulled from a Mitsubishi i-Miev electric car flooded in Super-Storm Sandy."

Autolib : 99€ l’abonnement 1 an jusqu’à 23h59 !

Today Autolib yearly plan is cheaper at 99 EUR instead of 144
Le 28 février 2013,
offre exceptionnelle !
99euros l'abonnement autolib' 1an
à la place de
valable uniquement aujourd'hui
j' en profite !
avec le code

Wednesday, February 27, 2013

LiFePO4 DIY ESS - Full Automatic Mode is now functional

The Automatic Mode of my DIY ESS is now fully Functional !

- If my solar system(*) generates more power than my usage, the ESS will switch from GTI Mode to Charger Mode and start switching ON chargers one by one to reach a Net usage close to 0W

- If the used power is greater than the solar array generated power, or if it is cloudy/dark, the ESS will switch to GTI Mode and start switching ON Grid Tie Inverters (GTI) one by one to reach a Net usage close to 0W

* (simulated for now using a small 900W heater on the generation line , since I am still waiting for my contractor to install the solar inverter)

Automatic Mode

Forced Charge Mode

Monday, February 25, 2013

LiFePO4 ESS - Forced Charge Mode

This week end I added this Forced Charge Mode fonction to my LiFePO4 ESS to manualy force the charge at low rate hours - at night - and re-use this energy during the day when energy is more expensive ...

To enter FCM, depress at least 2 seconds the pushbutton, and to quit this mode, same thing, and the ESS will go back to fully automatic mode ...

Update: After connecting the 4 chargers leads, it is now actually charging the battery pack; check this out

LiFePO4 DIY ESS - CALB Battery Pack First Charge after Bottom Balancing

Friday night, after checking that all the cells were at 2.75V (same as the morning), I started the charge process, screwing the leads of my 300W 24V LiFePO4 charger directly onto the battery pack terminals.

Here are some pictures of the charge steps at different hours: Note the voltage changes and the time on the clock in the back 

I cheked the cells voltages every once in a while and they remained perfectly together all the way 

I stopped the charging during the night for security reasons, and restarted it int he morning

Then I decided to test one of the three small low cost chargers I received this week, clamping the leads onto the battery pack terminals

and AC power, it just starts, with a red led and the small fan cranks up slowly, but remains pretty quiet

and it pushes roughly 100W into the pack

I then tried the two other chargers 

got rid of the US AC plugs and leads connectors

clamped them on the pack terminals in parallel with the 300W charger leads

and hook together the AC side wires and plugged them in using a French AC plug (no earth/ground on these chargers because they are all plastic) 

286W are used when all 3 small chargers are switched on

Now I switched the 300W back on, we are at 605W used and pushed intot the battery pack

Volatge is going up 0.1V

And the target pack voltage is reached at 28V, equals 3.5V per cell, as Jack Rickard recommands in his charging advices and I do not want to stress the new CALB cells for this first charge

Here, the chargers have been switched off, and I started the Grid Tie Mode, and the voltage immediatly drops ... 

This is the amount of energy used to almost fully charged the 8 CALB CA180FI cells

Control Board with all GTI relays closed/on

And this is the generation graph for this first fully charged day

Focus/Zoom on the generation part of the graph

Please Share this Post if you Liked it !

Please Share this Post if you Liked it ! Thanks !
Related Posts Plugin for WordPress, Blogger...