thanks for your reply. we are sorry to hear that you have problem in our battery, our battery defective rate is low. we have to tell you that, we are very concerned about the safety problem, we have protection circuit board in order to protect the battery from high heat and over charging. If the the charging over 5A, the fuse will burn. If the temperature reach 80℃ or more, the machine will stop to run. For the balance circuit , we use LG or Samsung cells, their voltage are the same, and have stable voltage, due to limited space, so we have not use the balance circuit. it dose not burn. For our battery for Irobot, the running time in the machine is similar in original irobot battery. thanks for your time to let us explain the details. we find that, you have some researches on the battery, we also willing to discuss the technology issue further about the battery with you if you have any question.
a1robotrepair wrote:Here is a picture with the guts removed...
a1robotrepair wrote:The "good" cells are used ICR18650s... from day 303 of 2010... eventually the cells will become unbalanced
a1robotrepair wrote:Next time I build a li battery I'll take pictures and draw some prints.
robocleaner wrote: but the wiring suggests that at best only groups of 18650 cells are being controlled/balanced rather than individual cells
Atlantis wrote:How big are the clusters? If you have cells in parallel you don't monitor individual cells - there is no point because they have the same voltage etc - you treat the whole block like it is one big cell.
What you need to monitor is every "stage" in series. 36V=10blocks=10monitoring wires to the BMS
Users browsing this forum: TechGuy and 207 guests