Current Sensing Solutions in EVHEV Batteries

 

Current Sensing Solutions in EVHEV Batteries

The electric car marketplace is selecting up quite hastily across the globe. Estimates show that the number of electrical automobiles on the street around the world will hit one hundred twenty five million by using 2030.Global market for Electric Vehicles (EV) and Hybrid. To manipulate electricity drift and optimize performance in HEV/EV powertrain subsystems including Traction Inverters, On-Board Chargers (OBC), DC-DC converters, and Battery Management Systems (BMS), particular and correct present day dimension is important. These high-voltage subsystems need to degree massive currents at high not unusual-mode voltages. For technical and regulatory reasons, the modern measurements require isolation in addition to very excessive performance in harsh automotive environments.

The standard configurations of electric automobiles in India are as under:

i) 2-wheeler

Battery % voltage = 48V , 72V

1kW , 2kW  Motor

ii) three-wheeler

Battery % voltage = 48V , 72V

2kW , 4kW Motor

iii) 4-wheeler and bus

Battery p.C. Voltage = 72V , 400V , 600V

20kW to 300kW

One of the important thing capabilities to make an electric vehicle safe is to accumulate facts and take quick remarks movements domestically based on this records. One such information factor which could be very essential and key to protection is the contemporary flowing across numerous sub-systems of an electric powered car.

We can break up the contemporary sensing in an Electric Vehicle widely into 3 classes as proven below:

1. Real time Overcurrent protection

Traction drives :

Battery protection circuitry :

2. Current and energy monitoring for System optimization

Battery gauging

System strength consumption

Power steerage

three. Current measurement for closed loop circuits

Motor drive application :

DC/DC converters

Below is a high degree overview of the extraordinary solutions from TI for cutting-edge sensing applications. The Y axis is the not unusual mode voltage of the rail thru which present day is being sensed and the X axis is the actual amplitude of the current being measured.

As proven in above parent modern may be sensed through a voltage throughout a small shunt resistance or may be measured through measuring the magnetic discipline produced by way of the contemporary at the same time as flowing thru the conductor. At Ti we provide answers for measuring current the use of each the strategies stated above.

A listing of answers to be had from TI for present day sensing application can be seen under:

Please be aware that the output of the current sensing amplifier can be both analog or digital. Based at the use case the engineer designing can determine at the mode of output for use.

Lets take a look at every of the use cases of modern sensor in a little greater intensity and take a look at some suitable solutions to be had from TI for the equal.

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