Precision current sensor to assist battery SOC precision estimation

A battery management system (BMS) is absolutely necessary to protect the battery from damage, extend battery life, and keep the battery fit to perform the function of the specified application. In addition, BMS supports the vehicle's safety and performance requirements,

This means that high-precision current sensors are an important part of BMS systems. The shunt module will be the most suitable current detection mode, it plugs into the current path and is easy to install and screw.

At present, there are many current sensor related products on the market in China, but there are generally various problems, among which the most typical is the problem of measurement range and measurement accuracy. First, traditional current sensors, due to their limited measurement range,

As a result, it also has certain limitations in the application scenarios of realizing energy storage systems, and can only issue correct and effective operation instructions within a limited measurement range. Moreover, traditional current sensors protect the outlet from a short circuit,

It may occur that the current reaches saturation on one side, and it is difficult to achieve protection of the circuit over a large dynamic range.

Specifically, the dynamic fluctuation measurement ability of traditional current sensors is weak, and when the current fluctuations are large when the battery is working, there will be a charging current of milliampere level and a discharge current of several hundred amps level at the same time.

It is necessary to solve the problem of large current changes, the problem of zero imbalance of very small current and the problem of small current measurement accuracy, and also consider the use and maintenance of the circuit.

JVT current sensor

With the development of new energy electric vehicles and industrial energy storage, current sensors based on shunt have been recognized by more and more Oems, battery factories and energy storage integrators, among which, the high-precision current sensor series products developed and designed by our company have been affirmed by the industry. High-precision current sensors also play a key role in the accurate estimation of electric energy of new energy vehicle BMS, energy storage power stations and DC charging piles.

【Product introduction】

Our current sensor is a current detection module based on the shunt, the user can be conveniently installed in the need to measure the current position and connected to the data processing end, through the NTC thermistor and connector on the PCBA real-time acquisition of the temperature and voltage drop of the shunt, the temperature compensation of the shunt resistance, calculate the accurate current. Therefore, our current sensor has the advantages of low cost, convenient application and high precision

Product advantages:

High accuracy (0.1%)

No initial offset

Automatic temperature drift compensation with good linearity (consistent accuracy across the entire range) will be the perfect solution for use in BMS systems.

【Application field】

Specific specifications and application solutions can pay attention to us, consult relevant information.