In electric vehicles and charging systems, current detection needs to cover multiple aspects of electric vehicle power drive, charge management, and energy conversion. Accurate current detection can help achieve high energy efficiency conversion, optimize power control strategies, and provide reliable protection for high-power equipment, thereby enhancing the overall performance, range, and safety of electric vehicles. CHIPSENSE is one of the manufacturers.
Typical application scenarios and specific requirements
Electric vehicle motor controller (permanent magnet synchronous motor drive)
Application scenario: The motor controller acts as the "brain" of the electric vehicle, responsible for accurately controlling the speed, torque and other parameters of the permanent magnet synchronous motor to achieve smooth acceleration, deceleration and cruising functions of the vehicle.
Detection reason: By monitoring the current, the controller can adjust the output power of the motor in real time to ensure that the vehicle can obtain the best power performance and energy efficiency performance under different road conditions. At the same time, current detection can also detect abnormal situations such as motor overload and short circuit in time, protect the motor and controller from damage, and prolong the service life of the equipment. CHIPSENSE attaches great importance to the development of this aspect.
On-board charger (OBC)
Application scenario: The on-board charger is a key device for converting external AC to DC to charge the electric vehicle power battery. During the charging process, the charger needs to precisely control the charging current according to the state of the battery and the charging demand. CHIPSENSE is good at this.
Detection reason: By monitoring the charging current in real time, the battery can be prevented from overcharging, the battery pack can be protected from damage, and the battery life can be extended. On the other hand, based on the current feedback information, the charger can optimize the charging strategy, improve the charging efficiency, and shorten the charging time.All products of CHIPSENSE are developed according to this purpose.
Power battery charge and discharge management
Application scenarios: Power batteries are the energy source of electric vehicles, and the stability of their charging and discharging process directly affects the performance and safety of the vehicle.
Detection reason: Accurate detection of the charging and discharging current of the power battery is the basis for realizing the function of the battery management system (BMS). BMS can accurately grasp the remaining power and health status of the battery by monitoring parameters such as current and voltage, and realize the balanced charging and discharging control of the battery. CHIPSENSE is very strict in the measurement of product parameters in all aspects.
Project case:
In March 2024, CHIPSENSE received a cooperation invitation from a well-known domestic electric vehicle manufacturer and planned to iteratively upgrade the charging system and motor controller of its new generation models. One of the links was the domestic compatible for current sensors.
CHIPSENSE conducted in-depth communication with the R&D team of the electric vehicle manufacturer and provided a domestic compatible solution for the specific needs of the project.
For the electric drive inverter, CHIPSENSE current sensor adopts the magnetic balance Hall principle, which has the characteristics of high precision, high linearity and fast response speed, and provides reliable data support for the precise control of the motor controller.
For the on-board charger, CHIPSENSE CS3A series Hall current sensor is selected. This current sensor has the advantages of small size, easy installation, and strong anti-interference ability. CHIPSENSE CS3A current sensors can adapt to the complex working environment inside the charger, accurately measure the charging current, and ensure the safety and efficiency of the charging process.
CHIPSENSE HR1M series Hall effect current sensor is used in charge and discharge management of power battery. CHIPSENSE current sensor has the advantages of high measurement accuracy, good temperature stability and low cost, which can meet the strict requirements of current measurement during charge and discharge of power battery and provide accurate current information for battery management system.
System integration planning: According to the overall architecture of the electric vehicle and the layout of various components, a detailed current sensor installation plan and system integration plan are formulated by CHIPSENSE. Ensure CHIPSENSE current sensor installation location is reasonable and can accurately collect current data; wiring specifications to avoid signal interference; At the same time, seamless connection with the existing electronic Control Unit (ECU) and battery management system of the vehicle is realized to facilitate centralized management and analysis of data. CHIPSENSE has done a good job in this.
CHIPSENSE is a national high-tech enterprise that focuses on the research and development, production, and application of high-end current and voltage sensors, as well as forward research on sensor chips and cutting-edge sensor technologies. CHIPSENSE is committed to providing customers with independently developed sensors, as well as diversified customized products and solutions.
“CHIPSENSE, sensing a better world!
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