advanced battery meter for 10s batteries

JMK1000

1 mW
Joined
Mar 1, 2020
Messages
17
Hello,
I am looking for a meter which I could use with the 10s batteries. Ideally the meter which I could plug the plug which goes to BMS and have a possibility to discharge or charge to balance as well as check the health of the battery.
I have seen many meters which do that but only for batteries 1-7s or 1-8s, never 10s.
*And of course I wouldn't like to take a mortgage to buy it :):):)
Any advice would be appreciated. Thanks
 
Another thought:
As I said, I found a few meters in which you can plug 7s or 8s battery and manage it.
Is it possible (using a custom plug adapter) to check 1 to 7 cells from one side of the battery, and than 3 to 10 cells from the other end of the battery - or it's just a 'heresy'?

I am trying to think out of the box, but I am only '1 mW' as classified by the Forum.
 
One more clarification:
I am assembling a new battery using Samsung 25R 18650 2500mAh 20A Batteries. I wanted to use some device to make faster checking the batteries, checking their internal resistance, and making sure that they are balanced before final assembly. I have a BTS unit which is supposed to work well with these batteries.
I found a meter: https://power.tenergy.com/tenergy-5-in-1-intelligent-cell-meter-capacity-checker-battery-balancer-battery-discharger-internal-resistance-tester-esc-servo-ppm-tester/?gclid=EAIaIQobChMI7c-VvLOg6wIVFIiGCh1cNAcTEAQYBCABEgLmM_D_BwE
but I would prefer something which would already work with 10s. Otherwise, I can work, pre-assembly with the meter I mentioned.

Am I on a good track, or completely 'off course'?
 
iCharger has or had multiple models that could do 10s. I have a 12-6s iCharger that I've used for almost 10 years and love it. The only 10s model I see in stock is the 3010B that is over $200. Cheap as I am I'd go the half and half route and do parallel groups 1-5s and 6-10s separately with my 6s iCharger long before I'd spring for the one that will do 10s, especially since some of the 10s models have been taken off the market.

While the iCharger will do everything you want, you might consider buying a pair of much cheaper chargers that will do 5s each, since you have a 10s pack. I have 16s, 20s, 21s, and 31s packs, so I have to do mine piecemeal no matter what.

NOTE- Be very careful in connecting multiple test chargers, because they will need totally separate power supplies. Since your batteries are connected in series those chargers cannot be connected to the same power supply, because they would share a common negative.
 
I've been using a turnigy reaktor for several years now. It's a great machine. Does 10s li-ion. All the usual stuff that an rc charger/discharger does including IR. High powered too.
 
I built a 4 way parallel sensor lead harness that goes between the bms and cells with the 3rd group going to the reaktor. That way if I want, I can discharge through the bms and monitor cell voltages and lvc to make sure the bms is functioning properly.
 
Thank you KDOG and JOHN IN CR:
I checked iCharger 3010B ($189). What kind of power supply is the best? It accepts 4.5-38V DC.
I haven't found a Turnigy Reaktor for 10s.

If I go checking/balancing 1-5s and then 6-10s - how would I charge such pack while testing/assembling - half a voltage (21V?) per half?

Can you do it with the assembled battery (leaving additional leads out)?

I have bought 40 Samsung 25R, Nominal Capacity: 2500mAh, Continuous Discharge Rating: 20A. Nominal 3.6V. 30 of them are all charged to 3.54V, and 10 to 3.57V - it's only 0.03V discrepancy. Can I just assembly it with the BMS nad charge or I should monitor the individual cells while charging as well (before sealing everything).
 
Another question about the usage of the batteries. Does it happen often that the BMS leaves some cells not charged properly? Especially in 4p batteries?
Is that a good idea to check the batteries plugging the balancing leads in a meter to check the cells health?

In such a case: do you leave the whole BMS outside the battery pack (insulated additionally)?
 
When I build a battery I either leave the bms accessible or even better, have a parallel 2nd set of sensor leads easily available for checking cell V.
 
The 1000w version does 10s liion or 12s lifepo
https://hobbyking.com/en_us/turnigy-reaktor-1000w-30a-balance-charger.html?___store=en_us
 
kdog said:
When I build a battery I either leave the bms accessible or even better, have a parallel 2nd set of sensor leads easily available for checking cell V.

I did exactly that. I have just redone the original battery which came with the scooter. I set up the 1-5 and 6-10 leads which connect to two https://power.tenergy.com/tenergy-5-in-1-intelligent-cell-meter-capacity-checker-battery-balancer-battery-discharger-internal-resistance-tester-esc-servo-ppm-tester/?gclid=EAIaIQobChMI7c-VvLOg6wIVFIiGCh1cNAcTEAQYBCABEgLmM_D_BwE
Digital Battery Capacity Checkers. I thought, that I would leave them to be charged as one, and if necessary changed the BMS for better.

So, I have a 10s2p battery with it's own BMS, and the 15, 6-10 leads sticking out. I can check the health of the cells whenever I need to.
If they go 'unbalanced' I can always replace them. I am waiting for the second meter to be delivered, so I won't need to make any calculations. But it's a sweet idea.

I just got 2 BMSs delivered for my new Samsung 25R batteries 10s4p. I will have the leads for the checkers sticking out - independent from the leads going to the balancing BMS.
 
kdog said:
The 1000w version does 10s liion or 12s lifepo
https://hobbyking.com/en_us/turnigy-reaktor-1000w-30a-balance-charger.html?___store=en_us

I may go this way in the future. But I would definitely take double of quad charger (same company). It goes expensive.

So far I am comfortable charging my batteries through the normal chargers knowing that on-board BMS should correct minor discrepancies and being able to check the health of the cels 1-5 and 6-10 simultaneously whenever I feel like. If the cells differ too much, I need to disassembly the battery anyway and replace the stressed cluster.

How much max-to-lowest would you tolerate with 4p. On the old 10s2p which came with the scooter I am getting 0.12V between the highest and the lowest. With the new Samsung 25r just 0.025V is the max.
 
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