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DFT-6108 Battery Analyzer
Instruction Manual
17
Appendix 6: Battery status judgment method with resistance list
6.1 Battery status judgment method
The quality of lead-acid battery batteries is closely related to their internal resistance. The relationship is as follows:
Internal resistance of Measure battery:
测
R
Internal resistance of standard batteries
：
标
R
Internal resistance ratio:
比
R
＝
The voltage of the measured battery:
测
V
Voltage of a standard battery
：
标
V
Voltage ratio:
比
V
＝
Battery status judgment method:
比
R
<1.15 the battery shows as excellent;
1.15

比
R
<1.5, the battery shows as good;
1.5

比
R
<2.0, the battery shows as medium
2.0

比
R
, the battery shows as replaced;
比
V
< 0.9 or
测
V
> 1.2*
标
V
, the battery appears as abnormal;
6.2 Capacity estimation method
When the battery status is displayed as abnormal, the capacity C = 0;
比
R
<1.2 :capacity
C＝
100
;
比
R
<2.0
：
Capacity
C＝
100
－
(
比
R
－
1.2)/0.8*20.0;
2.0

比
R
<5.0
：
Capacity
C＝
80
－
(
比
R
－
2.0)/3.0*50.0;
5.0

比
R
<10.0
：
Capacity
容量 C＝
30
－
(
比
R
－
5.0)/10.0*30.0;
10.0

比
R
：
Capacity
C＝
0;
标
测
R
R
标
测
V
V