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Old 02-17-2012, 09:09 AM   #78
_cy_ OP
Beastly Adventurer
Joined: Sep 2011
Location: Tulsa, Oklahoma
Oddometer: 6,437
Originally Posted by Anorak View Post
Lithium polymer is called that because the electrolyte is a polymer not because the container is a polymer. The form of the container doesn't matter. If the cell casing is wood, is that a lithium wood?
thanks for the clarification... posting from memory and we all know how infallible that can be
hey no one knows it all and glad for anyone to catch and inaccuracies.

edit: found it... on the Battery University site, which is one of the premier sources of battery information on the WWW.

"To make the modern Li-polymer battery conductive at room temperature, gelled electrolyte is added. All Li-ion polymer cells today incorporate a micro porous separator with moisture. The correct term is “Lithium-ion polymer” (Li-ion polymer or Li-polymer for short). Li-polymer can be built on many systems, such as Li-cobalt, NMC, Li-phosphate and Li-manganese. For this reason, Li-polymer is not considered a unique battery chemistry. Most Li-polymer packs for the consumer market are based on Li-cobalt.

With gelled electrolyte added, what then is the difference between a normal Li‑ion and Li‑ion polymer? As far as the user is concerned, the lithium polymer is essentially the same as the lithium-ion battery. Both use identical cathode and anode material and contain a similar amount of electrolyte. Although the characteristics and performance of the two systems are alike, the Li‑polymer is unique in that a micro porous electrolyte replaces the traditional porous separator. The gelled electrolyte becomes the catalyst that enhances the electrical conductivity. Li-polymer offers slightly higher specific energy and can be made thinner than conventional Li-ion, but the manufacturing cost increases by 10–30 percent. Despite the cost disadvantage, the market share of Li-polymer is growing.

Li-polymer cells also come in a flexible foil-type case (polymer laminate or pouch cell) that resembles a food package"

on to the next tests

10:15am Tulsa.. it's now 54f degree outside. Shorai LFX21 AH (pb eq) has recovered to 13.29v after sitting since earlier tests. going from 13.31v to 13.29 indicates very little capacity was used on the first tests.

flip the lights and heated grips on for 10 seconds... press the starter ... draws 105amps... motor spin over strong. choke is off, not ready for motor to start yet.... repeat for 4 more cycles.... 125amp draw.

starter is yet engaged again for another 4 sets ... now starter is drawing 145amps ... finally I turn the choke on... motor is spinning plenty strong. motor tries runs for a few seconds, but will not start. starter motor is energized for yet another 4-5 cycles. Battery is finally starting to slow down after these brutal series of starts.

time out for 2-3 minutes while battery recovers to 13.14v..... OOPSS... forgot to turn the fuel on.
press the button, starter cranks strong..... R80G/S roars to life.

what an impressive performance from this little battery!!!
before we uncork the champagne ... we've not see how Shorai performs when it's cold yet.

resting voltage 13.29v @ 54f degree, before continuing tests from earlier this morning.

13.08v and raising after 8+ cycles at 54f degrees, 145+amp draws

Shorai recovers to 13.14v after all the pounding... then cranks over motor strong again

_cy_ screwed with this post 03-24-2012 at 05:20 PM
_cy_ is offline   Reply With Quote