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Question
0 T( x1 K$ m9 xIn a series of batteries of the same dimensions, chemistry, voltage, from the same manufacturer, but with different capacities, which models shall be selected for testing if the safety compliance of the whole series is to be verified?0 ^; w' ?# `/ ~' P
Example series of Ni-MH batteries :
; A1 P& O- }+ }3 @1 k( R) i& X& O400mAh; 500mAh; 600mAh; 700mAh; 800mAh; 900mAh; 1000mAh; 1100mAh, 1200mAh; 1300mAh; 1400mAh; 1500mAh; 1600mAh; 1700mAh; 1800mAh; 1900mAh; 2000mAh; 2100mAh; 2200mAh; 2300mAh; 2400mAh and 2500mAh.4 D2 F$ N) |9 f) B1 e; k
Decision& o% m! e8 ~1 h; G
In the example above when total difference exceeds 20%
F7 J N0 k. h1 ~; g1 QStarting with the highest capacity, calculate capacity values in 20% increments below that value. Select those models in the series for testing whose capacities are closest to the determined 20% increment values.
3 W1 \2 R# _) r! M/ l; i2500 mAh, 2000 mAh, 1600 mAh, 1300 (1280) mAh, 1100 (1024) mAh, 900 (820) mAh, 700 (656) mAh, 600 (524) mAh, 500 (420) mAh and 400 (336) mAh.
* t! {1 K1 s" \* k8 r9 R" B; u# ^# ?. Y: WIf the total difference in a series of batteries does not exceed 20%% q. t: H( J" g2 f, j
Select for testing the lowest, the highest and one model closest to the middle of the series.9 m/ B* z) j" ]+ ?
A change that might lead to failure of any of the tests shall be considered a new type and shall be subjected to the required tests.
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发表于 2017-1-7 11:08
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