LiOn battery draw tester
- Thread starter canadmin
- Start date
6zfshdb
Well-Known Member
- Region
- USA
- City
- Northeast Pennsylvania
The only one I'm familiar with is a product from Grin Tech in Vancouver. It's called a "Grinspector" but unfortunately, it was discontinued in 2022:
ebikes.ca
There was an EBR member selling one in the classified section last year. You might try to PM him to see if he sold it:
forums.electricbikereview.com
If you're a DIY'er, you can make a crude tester using old incandescent light bulbs and a multimeter:
The load can be adjusted by adding or removing bulbs from the string. I can get a 20A load using some old 300 W bulbs. By measuring the voltage drop as you add load, you can get a fairly good idea of the battery condition.
Capacity loss can be checked by timing how long it takes to discharge using a known load. Care should be taken so as not to over discharge.
I added a timer so the rig can be used to discharge batteries to the proper voltage for storage:
One of the tricky parts in making such a rig is tapping the battery discharge connectors. My batteries all use the flat spade type. It was simple to cut the plug in half on an old extension cord. The prongs on the plug fit the battery perfectly.
Battery Grinspector
Battery discharge and cycling station based around a Cycle Analyst*Please allow 3-6 days manufacturing time. Full Product Information Page
ebikes.ca
There was an EBR member selling one in the classified section last year. You might try to PM him to see if he sold it:
Grinspector Battery Tester & Dummy Load
For sale, a brand new, never used Grin (ebikes dot ca) electric bike battery tester (based on their famous Cycle Analyst). You can hook this up to a PC to show battery performance. Never used... that is why the load bank doesn't have any colour change. Retails for $350 Canadian. Selling for...
forums.electricbikereview.com
If you're a DIY'er, you can make a crude tester using old incandescent light bulbs and a multimeter:
The load can be adjusted by adding or removing bulbs from the string. I can get a 20A load using some old 300 W bulbs. By measuring the voltage drop as you add load, you can get a fairly good idea of the battery condition.
Capacity loss can be checked by timing how long it takes to discharge using a known load. Care should be taken so as not to over discharge.
I added a timer so the rig can be used to discharge batteries to the proper voltage for storage:
One of the tricky parts in making such a rig is tapping the battery discharge connectors. My batteries all use the flat spade type. It was simple to cut the plug in half on an old extension cord. The prongs on the plug fit the battery perfectly.
Last edited:
il Munduato
Active Member
- Region
- USA
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