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Buying advise for a 2 quadrant benchtop Power supply

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badbus28:
Hi,
my company wants me to look into a benchtop power supply unit which simulates behaviour of battery under load or being charged.
The product we have uses 4 -18650 Lithium ion batteries total of 12000mAh capacity, 44Wh
I did some research and found that there are 2 quadrant and 4 quadrant power supply (4 quad being more expensive).
I found "Rohde & Schwarz" and "GW Instek" in value segment. NGL200 and NGM200 series looks quite attractive.

If anyone have more experience in this field and recommend me some value segment that would be really helpful

Thank you.

thm_w:
Budget? Max load current?
If 120W is enough, NGL200 seems like it would do what you want. Some more info here: https://www.eevblog.com/forum/testgear/rs-ngl200-current-overshoot/

You wouldn't need 4 quadrant, as the polarity does not need reversing.

GW instek: https://www.gwinstek.com/en-global/products/detail/GPP-Series
Might work, but probably require a lot of scripting. https://uei-vienna.com/fileadmin/user_upload/GPP_DC_Load_function.pdf

mawyatt:
If you don't need both functions within the same chassis, a separate Power Supply and Electronic Load might satisfy your requirements and be less expensive.

Best,

rcjoy:

The Keysight E36731A Battery Emulator seems to be what you want, depending on what you mean by "value".

https://www.keysight.com/us/en/product/E36731A/battery-emulator-and-profiler.html

jmw:
If your product has a SoC or MCU and you want to characterize its power usage against the software state, on top of battery simulation, you might consider https://www.qoitech.com/

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