tag:blogger.com,1999:blog-2065249958925006388.post2021433973711552556..comments2023-03-31T02:29:54.142-07:00Comments on kWsaki: On swelling and battery lifejsantalahttp://www.blogger.com/profile/13711677346363688402noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-2065249958925006388.post-86127305522794701372013-04-11T06:25:27.546-07:002013-04-11T06:25:27.546-07:00Cell count is 21 and I have no idea where I coult ...Cell count is 21 and I have no idea where I coult get 22nd cell as they're some old used prototype things. That's also why I'm really not that interested if they last thousands or hundreds of cycles. Maybe I'll give a thought to that voltage based relay control..Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2065249958925006388.post-79126765088100997542013-04-10T23:15:33.033-07:002013-04-10T23:15:33.033-07:00I have also gathered a couple of old CPU coolers t...I have also gathered a couple of old CPU coolers to see if I could attach them to the bottom of the AXE controllor, with or without fans. I'm not sure, but I think I may have hit a thermal limit last summer. The symptoms were power being cut off and then coming back suddenly. I should probably ask Alltrax whether the AXE thermal throttling works like this.jsantalahttps://www.blogger.com/profile/13711677346363688402noreply@blogger.comtag:blogger.com,1999:blog-2065249958925006388.post-74555334538560120682013-04-10T23:12:39.771-07:002013-04-10T23:12:39.771-07:00There's two ways you can go about this. You ca...There's two ways you can go about this. You can either decide on the cell count and then order a suitable charger or if you have charger you can match the cell count to the charger. For example use 25 cells with a charger meant for 24 or 33 for a charger meant for 32. Of course, if you already have the cells as well then it gets complicated.<br /><br />You could also experiment with adding a separate volt meter with relay control so you could end the charge as soon as the cells hit 3.5 V. You'd lose the CV phase of the charge, but on the other hand you'd gain more life cycles because of the resulting undercharge. At least it's easy to measure how many Ah you'd get into the pack if you did this just by watching a charge and noting the Ah count when the voltage limit is reached.jsantalahttps://www.blogger.com/profile/13711677346363688402noreply@blogger.comtag:blogger.com,1999:blog-2065249958925006388.post-91384114514154982302013-04-10T10:47:32.174-07:002013-04-10T10:47:32.174-07:00For some strange reason, I'm starting to be co...For some strange reason, I'm starting to be convinced that bottom balancing is the way to go. Too bad that the charger I ordered hasn't any calibration abilities. <br /><br />I've also thought about using computer water cooling if my Alltrax will get hot someday. Blocks are not that hard to made, controller has large smooth area for heat to transfer and pumps work with 12 volts. Anonymousnoreply@blogger.com