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-   -   Charging protocol. Advice needed (https://www.rctech.net/forum/radio-electronics/1013392-charging-protocol-advice-needed.html)

Krio 03-20-2018 07:55 AM


Originally Posted by Rlmxracer (Post 15187971)
I’m also new to the LiPos. Do you always balance charge or only once a week, month, etc?

Safest practice is to balance charge every time. This makes sure the cells don't go over 4.2 volts (or 4.35 for High Voltage packs), which can cause damage to the cells. You don't have to wait for the charge to completely finish every time if you are in a rush, as balance charging can take longer. Once the current drops below 1 amp for a typical 5000mah pack, you are 98% charged.

Bri 03-20-2018 08:16 AM

It's always best to balance charge every time unless you are in a hurry and need to charge a pack right away to make a race.

Best regards,
Brian

RC*PHREAK 03-20-2018 09:05 AM


Originally Posted by Krio (Post 15187963)
Usually the pack is fully enclosed and you let it heat up like that for close to an hour to make sure the entire pack is the same temp. Tire warmers was a poor example. We used to have a hot box that had a few 60 watt led bulbs in an insulated crate with a temp gauge sticking out the side. We'd keep the box at 110-125 and just open a small door and put the packs in and let them warm up while they charged at 1C.

Same could be said for fast charging them. You see 120 on the outside, but could have pockets of 140+ on the inside that are eating away at the lifespan of the pack.

To take an hour to warm, you have to have multiple packs (unless it’s a large turnout where it takes longer than an hour for each round). Sounds almost like a wash to me (multiple packs needed to cook them for an hour versus replacing sooner due to high charge/discharge rates).

Krio 03-20-2018 10:27 AM


Originally Posted by RC*PHREAK (Post 15188043)
To take an hour to warm, you have to have multiple packs (unless it’s a large turnout where it takes longer than an hour for each round). Sounds almost like a wash to me (multiple packs needed to cook them for an hour versus replacing sooner due to high charge/discharge rates).

An hour would guarantee it was all up to temp from 60 degrees (cold building racing in the winter). In practice, it takes less time than that. We would run the race, hook them up to the charger, and put them right back in the box while they charged. The packs would only be out of the warmer for 7-8 minutes when they were in the car for each race, so there wan't much heat lost in the first place.


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