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A battery simulator is an electronic device designed to test
Once the simulated battery voltage is set, the user connects the charger to be tested to the input of the simulator. The charger will detect that a battery has been connected and the charging process will begin. The simulator keeps the voltage constant at the set value, while the analogue ammeter indicates the charging current. If the battery simulator has a current limit feature and if the current exceeds the maximum set value, the simulator automatically increases the voltage to limit the current
The advantage of using a battery simulator is its ability to freely set the emulated battery voltage to any value in order to test the charger. For example, a real charger profile curved is obtained by sweeping the simulator voltage while recording its voltage and current. The figure to the right shows a typical Lithium ion charging profile curve obtained by using a battery simulator. The profile curve of the charger is obtained in a few minutes.
battery charger
A battery charger, recharger, or simply charger, is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage and current, for how long and what to do when charging is complete� ...
s by simulating the behavior of a battery
Battery or batterie most often refers to:
* Electric battery, a device that provides electrical power
* Battery (crime), a crime involving unlawful physical contact
Battery may also refer to:
Energy source
* Battery indicator, a device whic ...
during the charging process.
Characteristics
Highlights in the battery simulator are theIGBT
An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily forming an electronic switch. It was developed to combine high efficiency with fast switching. It consists of four alternating layers (NPNP) that ...
or MOSFET
upright=1.3, Two power MOSFETs in amperes">A in the ''on'' state, dissipating up to about 100 watt">W and controlling a load of over 2000 W. A matchstick is pictured for scale.
In electronics, the metal–oxide–semiconductor field- ...
high frequency regulator (which allows the equipment to work with constant current
A constant current (steady current, time-independent current, stationary current) is a type of direct current (DC) that does not change its intensity with time. The syntagma stationary current is a contradiction in terms, however in use.
Sources ...
and voltage), the programmable digital panel.
A battery simulator may have the following features:
* An IGBT
An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily forming an electronic switch. It was developed to combine high efficiency with fast switching. It consists of four alternating layers (NPNP) that ...
or MOSFET
upright=1.3, Two power MOSFETs in amperes">A in the ''on'' state, dissipating up to about 100 watt">W and controlling a load of over 2000 W. A matchstick is pictured for scale.
In electronics, the metal–oxide–semiconductor field- ...
high frequency regulator
* Digital voltmeter
* Analogue ammeter
* Test voltage selector
* Potentiometer
A potentiometer is a three- terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat.
The measuring instrum ...
fine tension adjustment.
* Potentiometer current selection (0-200 A)
* self-test
* Automatic stop in case of failure
* Thermal protection
A thermal cutoff is an electrical safety device (either a thermal fuse or thermal switch) that interrupts electric current when heated to a specific temperature. These devices may be for one-time use (a thermal fuse), or may be reset manually or ...
in case of overtemperature
Functioning
Battery simulator mimics a battery's electrical characteristic of outputting a voltage and is able to source as well as sink current. This type ofpower supply
A power supply is an electrical device that supplies electric power to an electrical load. The main purpose of a power supply is to convert electric current from a source to the correct voltage, electric current, current, and frequency to power ...
is called two-quadrant power supply. In contrast, a conventional power supply can only source current when the voltage is positive.
A battery simulator may be able to set the simulated battery voltage either remotely via PC or manually. Often battery simulators have built-in voltage and current display and monitoring. For example, the user selects the voltage of the battery to be simulated, using the potentiometer knob for adjusting the voltage, while the current value is displayed on the digital screen. An independent potentiometer is available to select the maximum current that the equipment can source or sink.
Battery charger testing
The basic use of battery simulator is replacing a real battery with a simulator. This enables the testing of the charger both during development and during production testing.
Once the simulated battery voltage is set, the user connects the charger to be tested to the input of the simulator. The charger will detect that a battery has been connected and the charging process will begin. The simulator keeps the voltage constant at the set value, while the analogue ammeter indicates the charging current. If the battery simulator has a current limit feature and if the current exceeds the maximum set value, the simulator automatically increases the voltage to limit the current
The advantage of using a battery simulator is its ability to freely set the emulated battery voltage to any value in order to test the charger. For example, a real charger profile curved is obtained by sweeping the simulator voltage while recording its voltage and current. The figure to the right shows a typical Lithium ion charging profile curve obtained by using a battery simulator. The profile curve of the charger is obtained in a few minutes.
References
{{reflist Test equipment Electric battery