Timeline for answer to What protection circuits do laptop batteries come with? by Bill Dubuque
Current License: CC BY-SA 3.0
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| May 8, 2016 at 17:58 | comment | added | Bill Dubuque | @Kim-YannickJürs Yes, the BMS will protect against shorts. As I mentioned here there is an extensive amount of failure analysis done on the design of laptop battery power systems, including even consideration of cases such as "pet urinates on PC". | |
| May 8, 2016 at 15:55 | comment | added | Transistor | That was not an intelligent thing to do. | |
| May 8, 2016 at 15:44 | comment | added | user104413 | At least it has a short-circuit protection, because nothing happened as the 2 pins, which I made out of aluminium foil and tape, were connected together for like 10 seconds. | |
| May 8, 2016 at 15:41 | comment | added | Bill Dubuque | @Kim-YannickJürs Almost surely so, but one can never be too safe when dealing with Li-ion cells. | |
| May 8, 2016 at 15:33 | comment | added | user104413 | The battery has more than just 2 pins, doesn't that already mean it has some sort of battery management system in there? | |
| May 8, 2016 at 15:23 | comment | added | Bill Dubuque | @Kim-YannickJürs Almost certainly so but you should check to be be sure. It is easy enough to test. For example, drain it till your laptop shuts down, then see if it sill works in your other device. If so, check that the discharge protection kicks in fairly quickly. If not, give it a very slight charge in the laptop, then do the protection test in the other device. There may be a slight difference where it shuts off in each device due to varying loads from the devices (which causes varying voltage drops due to internal resistance in the cells). | |
| May 8, 2016 at 15:15 | comment | added | user104413 | The laptop is a very old one with a Pentium 4. Are even that old laptops protected against underdischarge? | |
| May 8, 2016 at 15:11 | history | edited | Bill Dubuque | CC BY-SA 3.0 |
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| May 8, 2016 at 15:06 | comment | added | user104413 | Thanks for this info. I would vote up if I had enough reputation to do this. | |
| May 8, 2016 at 15:06 | history | edited | Bill Dubuque | CC BY-SA 3.0 |
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| May 8, 2016 at 15:05 | vote | accept | CommunityBot | ||
| May 8, 2016 at 15:00 | history | answered | Bill Dubuque | CC BY-SA 3.0 |