Figure 13, Bts Temperature To Charge Voltage Change - Magnum Energy MM AE Series Owner's Manual

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Table of Contents

Battery Temperature Sensor Operation

perature Sensor (BTS) is used to determine the battery temperature

around the batteries. This information allows the multi-stage battery

charger to automatically adjust the battery charge voltages for opti-

mum charging performance and longer battery life.

When the BTS is installed, if the temperature around the BTS is below

77°F (25°C) the absorb and ﬂ oat charge voltage increases. If the

temperature around the BTS is higher than 77°F (25°C), the absorb

and ﬂ oat charge voltage decreases. See Figure 13 to determine how

much the charge voltage changes (increases or decreases) as the

temperature reading of the BTS changes. For example, the nominal

absorb charge voltage for a ﬂ ooded battery at 77°F (25°C) on a 24-

volt model is 29.2 VDC. If the battery temperature is 95°F (35°C),

the absorb charge voltage would decrease to 28.6 VDC (29.2 VDC

- 0.6 change).

If the temperature sensor is NOT installed, the charge voltages will

not be compensated and the battery will maintain the charge it had

at a temperature of 77°F (25°C). The life of the batteries may be

reduced if they are subjected to large temperature changes when

the BTS is not installed.

Info: When the BTS is connected, the battery charger

uses a value of -5mV/°C/Cell from 0-50°C to change the

charge voltage based on temperature.

T em p eratu re C o m p en satio n u sin g B T S

1 2 V D C u n its

+0.75 V

0.75

+0.6 V

0.6

+0.45 V

0.45

+0.3 V

0.3

+0.15 V

0.15

N o C hange

-0. 15V

-0.15

-0 .3V

-0.3

-0. 45V

-0.45

-0 .6V

-0.6

-0. 75V

-0.75

32F

41F