Hi Steve,
Have you checked with the battery manufacturer?
In the meantime, the governing specifications for this type of battery are:
1) ANSI C18.1 Part 1
An excerpt from the document scope is:
This standard applies to portable primary cells and batteries with
aqueous electrolyte and a zinc anode (non-lithium). This edition includes the
following electrochemical systems:
a)
Carbon zinc (LeClanche and
zinc chloride types);
b)
Alkaline manganese dioxide;
c)
Silver oxide;
d)
Zinc air;
e)
Nickel oxyhydroxide.
2) IEC 60086-2
An excerpt from the document scope is:
This part of IEC 60086 is applicable to primary batteries based on
standardized electrochemical systems.
It specifies
-
the physical dimensions,
-
the discharge test
conditions and discharge performance requirements.
From here, you may be able to find out what you need.
If not, keep asking.
Good luck!
Gerry
> Date: Wed, 13 May 2015 07:52:29 -0500
> From: [log in to unmask]
> Subject: [TN] Alkaline batteries
> To: [log in to unmask]
>
> I know that this is peripheral to the topic of electronics, so if this is a breach of etiquette I apologize But… we are having some challenges with alkaline batteries and I am wondering if anyone has had a similar experience at some point, and perhaps can give enlighten me.
>
> We are seeing dramatically short battery life, but the failure mode is a little unusual. Normally I see the open circuit voltage (Voc) drop steadily with use, at the same time as the internal resistance gradually rises, until eventually the combination reduces the voltage under operating load and the battery is effectively dead.
>
> Now I am seeing the open circuit voltage basically unaffected (i.e. 1.5V per cell), while the internal resistance is VERY high. So the batteries have no current-generating capacity, and can’t drive the operating load.
>
> Does anyone have any suggestions as to what might cause this behavior? I can think of all kinds of things to do to kill batteries, but they always affect the Voc at least as much as the resistance.
>
> Some specifics:
> - Alkaline D cells
> - Brand name, from a reputable manufacturer, with a good track record in the past
> - There is no problem on the application side (the devices being powered are within specification, consistent with past performance, no current spikes and so on)
> - For reference purposes, we normally see starting Voc at 1.5V and internal resistance maybe 0.2R per cell. At end of life, we would expect Voc around 1.0V and internal resistance around 0.6R.
> - In this case, we are seeing Voc at 1.5V and internal resistance 1.0R to 1.5R, with about 5% of what we would call normal life usage (i.e. 2000-3000 operating cycles out of a normal battery life of maybe 60k cycles)
>
> Any ideas? What would you do to alkaline cells to get them to behave like this? I suppose it could be a problem on the battery manufacturing side. But I would welcome any brainstorms or suggestions.
>
> Thanks,
> Steve Hackney
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