DIY ESS Kit blog reaches 6,000 visits

Merci de vos visites !

Thanks for visiting !

LiFePO4 ESS - Testing, testing, & testing ...

Still testing a lot my LiFePO4 DIY ESS and here are some graphs and videos from yesterday: the ESS power generation "sticks" to my home power usage, and I like that :-)

Wattson Power graphs: Evening

Morning

May 3rd and 4th

Go Motorboard 2000X - Charging at home

Here are some pics of my Go Motorboard 2000X charging at home before going for a ride outside on this sunny sunday afternoon

The electric scooter folded with its NiMH charger plugged in

3-prong connector for the charge port

Strong built : the scooter hinge and lever made of thick aluminum

Underneath, the body / structure is also aluminum and very stiff, supporting up to 120 kg rider

Is Nissan looking into Bottom Balancing ?

Looking at the real-time visitors monitor on my blog, I just saw this interesting visit from a Japanese from Yokohama who arrived loooking for "how to bottom balance a battery pack" on the Bing search engine

Nissan's headquaters being in the same city, I thought: Maybe Nissan's engineers are looking into a new strategy for their BMS for the LEAF, e-NV200 or ESFLOW ... Who knows ?

Anyways, this person ended up reading about my bottom balancing tool and probably the whole Bottom Balancong simple strategy behind it

EVTV Friday Show - May 18, 2012

New episode of EVTV released yesterday:

- DC Motor brushes: testing split brush again old regular brush on a Netgain Warp 9
- A123 Battery pack- 7th version

Jack test his 7th A123 LiFePO4 pouch cells module configuation: 8 cells in parallel clamped with 2 of his home made clamping device, and 5 modules will go in the aluminum box

Bottom balancing  and Testing with a programmable automatic charge & discharge device mentionned in previous videos

Testing different brushes on the same motor and with the same battery pack to compare temperature on the commutator, RPM, watt/hour ,etc

The finding is incredible: A 13% gain with new Helwig H60 Red Top brushes compared to the original ones shipped with the motor !