LiPo battery peak current burst C rating

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Discussion Overview

The discussion revolves around the peak current burst C rating of LiPo batteries, specifically addressing the implications of drawing higher currents than the rated burst capacity and the associated risks, such as battery failure or explosion. Participants explore the conditions under which higher currents can be drawn and the factors that contribute to battery safety in applications like drones and electric vehicles.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • Some participants note that the burst C rating typically refers to the maximum current allowed for a duration of 10 seconds.
  • There is a question about whether it is permissible to draw higher current for a shorter duration, specifically for 1 second, and the potential heat issues that may arise from this.
  • One participant raises concerns about the safety of LiPo batteries, mentioning that they can explode and inquiring about the causes of such failures.
  • Another participant references a resource aimed at hobbyists that discusses the causes of explosion and fire in LiPo batteries, suggesting it may be useful for understanding the topic better.
  • A participant provides a scenario involving a truck that requires a steady current of 65A and peaks at 150A for the first second, questioning whether a battery with a maximum burst current of 100A would be suitable for this application.

Areas of Agreement / Disagreement

Participants express varying levels of concern regarding the safety of drawing higher currents than the rated burst capacity. There is no consensus on the implications of exceeding the burst rating or the specific conditions under which it may be safe to do so.

Contextual Notes

Participants have not fully explored the assumptions regarding the thermal limits of the batteries or the specific definitions of burst ratings, leaving some aspects of the discussion unresolved.

Who May Find This Useful

This discussion may be of interest to hobbyists, engineers, and anyone involved in the design or use of devices powered by LiPo batteries, particularly in applications requiring high current draws.

EnEE
Messages
16
Reaction score
3
Hi,
as I know the burst C rating usually refers to the max current allowed for 10 seconds.

if I need higher current for 1 second, I can do it?
The heat is the problem here?
 
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EnEE said:
Hi,
as I know the burst C rating usually refers to the max current allowed for 10 seconds.

if I need higher current for 1 second, I can do it?
The heat is the problem here?
Um, why do you ask? Whatcha' makin'?
 
because lipo battery sometimes explodes...
motors require high current for the first seconds, so I want to know what's cause the battery to explode (and why drones usually use lipo)
 
Try this a basic start
https://rogershobbycenter.com/lipoguide/
It is aimed at hobbyists, but based on what you asked you really should consider reading it. It explcitly explains explosion/fire causes.
 
I read this article. This is a good example for my question. If the truck need steady current of 65A and 100A for the first 3-4 seconds,
I know that for the first second it draw about 150A.
Can I use battery with Max burst current of 100A?
 

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