Would this battery be good in a powerchair?

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Re: Would this battery be good in a powerchair?

Postby Burgerman » 14 Sep 2017, 00:13

No. Unfortunately. For the same reasons as all the other lead brick replacements.

BLF-2450WS (ABS Sealed) Battery Specifications
Voltage: 24V
Capacity: 50Ah

That means 100 total since we need two.
Thats OK but not great. (The battery is too big physically to actually fit however)

Charge/Discharge Connector: Steel Posts
Maximum Continuous Discharge Current: 50A

Thats 100 max. Since we need two. But our powerchairs need 200 to 220 depending on Power Module. It will chop off power when you need it. So as you climb a ramp onto a train. Or whatever.

Maximum Peak Pulse Current: 100A (2 sec.)
That means 200A for 2 secs! Thats borderline OK for a smaller system, but r-net for eg can require 220A for 10 secs. So it will chop off power. In reality do this often and the BMS will fail anyway. Most are overrated and use tiny components.
Max Power Delivered to Load @ 24V: 1200 Watts (24v x 50A = 1200 Watts)
Two used, so 2400w. Not enough. 120A x 25.6V x 2 is 3072 watts.

Dimensions: 13.9 in. x 6.6 in. x 7 in. (353.1 mm x 167.6 mm x 177.8 mm)
Weight: 26 lbs. (11.7 kg.)

Heres the next somewhat massive problem. Its a GRP 31 battery. Each one is almost 4 inches too long.
Weight? Great! But you actually need to compare the smaller GRP 24 sized battery. And its spec is 25% less for all the above.

Includes built-in PCM (protection circuit module) which provides internal cell balancing and management, protection from overcurrent, undervoltage (overdischarge), overvoltage and short circuiting, and has integrated charging circuitry

All of which we don't want, except balance. And the balance spec will be the same as all these BMS are. Meaning terrible!

Please read: viewtopic.php?f=2&t=1813
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Burgerman
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Re: Would this battery be good in a powerchair?

Postby Burgerman » 14 Sep 2017, 00:23

And even if you used a chair that was mildly programmed that didn't offend it, and if the battery would actually fit, its 1800 dollars or so for two! And only 100Ah.

So not a good plan. There are no plug and play solutions that are much good that I have seen so far. In fact all are almost identical. With different labels...
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Location: United Kingdom


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