Sanyo Tool Reset Bq8030 Datasheet Pdf
I measured each of the cell (pair) voltages, and they were all approximately 3.97V. Battle for middle earth 2 map pack download. According to TI's (Figure 1), this is a normal voltage for a mostly-charged cell. In fact, the Power Manager applet showed a total voltage of 15.86V, which adds up.
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However, it's debatable whether the PM reading should be trusted, since, not knowing exactly how the PM works, there is a possibility that the battery is in fact damaged and the reading is stale data from when it was last healthy. Either way, my multimeter confirmed the cells have a healthy voltage (I don't know enough about Li cells to say for sure that this means the cells are completely healthy). I also haven't tried measuring their voltage under load (a small resistor), since that's fairly dangerous if not done properly and I would prefer to avoid any fires until it becomes absolutely necessary. Hi, we are in same situation here.
I have a Lenovo 3000 N100 laptop with 3-cells battery and in sort, i did test my battery with external load (~300mA) and last for several hours as it should, then i recharged the battery with a multi-voltage wall transformer (LM317 inside). I believe the cells are ok and the problem is at the circuit board but i am stuck there because i cant find information for the ic's that have. I did find any problem with the other components. Have you make any progress with your battery? I have a x61 with the same problem. I know for fact that the cells are still good, but power manager thinks there is something faulty, therefore has basically written a limit on the charge capacity to the controller in the battery pack. The reason I know that the pack is still good is because I monitor my battery's capacity on a weekly basis (hey that's what engineers do ok).
I had roughly 65Wh before I ran the power manager reset. And afterwards, the battery only held about 36Wh. The pack was designed to hold 74Wh, but I've used it for about 11 months so 65Wh makes sense. However, the resulting 36Wh tells me that the power manager has a bug. The cells are connected in series, therefore the cells have to be balanced in order to avoid cell reversals during discharge.
The thing is that, cell balancing actually takes a very long time (sometimes up to days) because once 1 cell reaches the maximum voltage the controller will stop the charging process to avoid overcharge. Then the controller has to balance the cells by first discharging the 1 cell, or by passing the current from the 1 cell to the 2nd cell. Similar to a bubble sort in programming.
As you can imagine, with 8 cells this can take a long time. Now, this is also where the power manager may have a bug with its reset. Once any of the cells reaches the maximum voltage, the charging stops. However, this doesn't mean that all of the cells have been charged.
The power manager then discharges the battery immediately, and obviously the resulting capacity will be much lower since not all of the cells have been fully charged. With the new 'lowered' capacity value, power manager then writes to the board in the battery pack limiting the charge capacity. This is just my theory. I have been playing with LiFEPO4 batteries on electric bicycles for the past few months and this is what I have learned about them. I will be taking apart the battery once Lenovo rejects my request for a replacement. I have lenovo x61 laptop and my battery suddenly decided not to work after 1 month of expired warranty.
I believed lenovo did this for profit. Because before my warranty expired, lenovo customer called me to extend my warranty. They planned a bug in a power management software.
I have dell for years and the battery still good. We should all boycott IBM/lenovo. This philosophy caused GM to go down. I can't believed lenovo customer won't talk to me because I have no warranty.
This practice give me bad taste. I WON'T BUY IBM/LENOVO AGAIN!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1. Well, my problem is a bit different, i gave my battery a can of beer to drink that leaked in my backpack where i carried my battery. It seems there are ppl reading this with engineering experience. I unfortunately am on an exchange in brazil right now and therefore don't have access to proper measuring tools to check the voltage or anything. After the accident it didn't work anymore, although the power manager recognizes it as 100% fully charged (how it was prior to the accident), but as soon as i disconnect from the grid the laptop is dead.