Evaluate Battery Charge Level, Basic Function - GF54.10-S-1000A
Model All (Light transporter)
Overview
This document contains information on:
- General
- Function
- 12 V on-board electrical system battery.
- 48 V battery (vehicles with 48 V technology).
- High-voltage battery (electric vehicles).
General
The energy management continuously evaluates the battery state of charge. It uses this as a basis to actuate various functions in order to guarantee vehicle mobility and stable supply to all electrical consumers.
Function
The state of charge of the battery is the ratio of the current charge to the maximum storable charge.
The energy management calculates the state of charge of the battery based on the following values:
- Battery voltage
- Current flow from and to the battery
- Battery temperature
- Internal resistance of battery
- Battery capacity
If the state of charge is too low, the battery must be charged.
12 V on-board electrical system battery
In vehicles with a conventional AGM battery, the parameters that describe the state of charge of the 12 V on-board electrical system battery are recorded by the battery sensor at the negative terminal of the 12 V on-board electrical system battery.
On vehicles equipped with a lithium-ion battery, an electronic system is integrated into the 12 V on-board electrical system battery.
48 V battery (vehicles with 48 V technology)
An electronics system is integrated into the 48 V battery that continually records information about the battery's state of health and sends it to the 48 V on-board electrical system's energy management system.
The 48 V battery is heated at low temperatures via the low-temperature circuit and cooled at high temperatures. This ensures a long service life and an optimum storage capacity for the 48 V battery.
High-voltage battery (electric vehicles)
The state of charge of the high-voltage battery is monitored by the battery management system.
The high-voltage battery is heated at low temperatures at cooled at high temperatures. This extends the service life and ensures an optimum storage capacity of the high-voltage battery.
| Function schemas | |||
| Evaluate state of charge of high-voltage battery, function schema | Model 420 Electric vehicles | PE47.70-S-2500-97VRA | |
| Model 447 with code M7E (Electric motor 150 kW/battery 60 kWh (usable)) with code M8E (Electric motor 85 kW/battery 60 kWh (usable)) with code ME4 (Electric motor 145 kW) with code XM7 (MOPF II) | PE47.70-S-2500-97A | ||
| Evaluate state of charge of 12 V battery, function schema | Model 420 | PE54.10-S-2516-97VRA | |
| Additional basic functions | |||
| High-voltage battery, basic function | GF47.70-S-2000A | ||
| Battery management system control unit basic function | Model all (Light transporter) with code M7E (Electric motor 150 kW/battery 60 kWh (usable)) Model all (Light transporter) with code M8E (Electric motor 85 kW/battery 60 kWh (usable)) Model all (Light transporter) with code ME0 (Electric motor 85 kW) Model all (Light transporter) with code ME4 (Electric motor 145 kW) |
GF47.70-S-9895A | |
| Battery sensor, basic function | GF54.10-S-2009A | ||
| On-board electrical system battery, basic function | GF54.10-S-2011A | ||
| Secondary 12 V on-board electrical system DC/DC converter control unit, basic function | GF54.10-S-2019A | ||
| 48 V battery, basic function | Model all (Light transporter) with code M56 (48V technology) | GF54.10-S-2022A | |
| Electric vehicle high-voltage on-board electrical system DC/DC converter control unit basic function | Model all (Light transporter) Electric vehicles | GF54.10-S-9895A | |
| 48 V on-board electrical system DC/DC converter control unit basic function | Model all (Light transporter) with code M56 (48V technology) | GF54.10-S-9898A | |
| Basic function of signal acquisition and actuation module | GF54.21-S-9895A | ||
| Electronic ignition lock control unit, basic function | GF80.57-S-9890A |