Currently, energy shortages have become the driving force behind the global industrialization of electric vehicles. With the vigorous development of the electric vehicle industry, the battery management system, as one of the key components of electric vehicles, is also facing higher demands. Pure electric buses, as an important part of public transportation, have their battery management system design and optimization directly related to the vehicle's safety, reliability, and range.The Medium-Voltage MOSFET, as an advanced power electronic component, plays an indispensable role in the battery management system of electric buses. The Battery Management System (BMS) on pure electric buses is a complex and sophisticated system that successfully achieves real-time monitoring of the on-board power battery status, ensuring the safe operation of electric buses. The BMS not only has functions such as single-cell voltage measurement, temperature control, online fault analysis, fault localization, but also accurately estimates the state of charge of the battery, providing services such as display, fault output, data dumping, and remote monitoring. The realization of these functions depends on the high-precision control and efficient operation of the Medium-Voltage MOSFET.

In the BMS, the Medium-Voltage MOSFET can achieve high-precision adjustment of the battery current to ensure the safe charging and discharging of the battery. During the charging process, the device can adjust the charging current and voltage according to the real-time status of the battery to prevent overcharging. During the discharging process, it can ensure a stable power output from the battery while avoiding damage caused by over-discharge. Furthermore, through real-time monitoring of parameters such as battery voltage, current, and temperature, the Medium-Voltage MOSFET can promptly detect abnormal conditions of the battery, such as short circuits, overcurrent, overheating, and take corresponding protective measures, such as cutting off power or limiting current, to ensure the safe operation of the battery.In addition, Slkor (www.slkoric.com) has introduced a large number of semiconductor products with superior performance, such as high, medium, and low-voltage MOSFETs, thyristors, bridge stacks, power management chips like LDO, AC-DC, ADC chip series, etc.

Slkor Semiconductor silicon carbide field-effect transistor

In the Battery Management System (BMS), the Medium-Voltage MOSFET is primarily used to control the charging and discharging operations of the battery. When the battery voltage exceeds the set upper limit, the BMS will control the Medium-Voltage MOSFET to conduct, releasing current from the battery; when the battery voltage falls below the set lower limit, the BMS will control the Medium-Voltage MOSFET to cut off, stopping the battery discharge. In this way, the BMS can protect the battery, preventing overcharging or overdischarging, thereby extending the battery's lifespan. The device can also detect overcharging, overdischarging, excessive current during charging and discharging, and excessive current during a short circuit, providing significant protection for lithium battery packs.

In the battery management system, the switching characteristics of the Medium-Voltage MOSFET are also used to control the cutting off and closing of the main circuit for supplying power externally from the battery, ensuring that in scenarios with uninterrupted power supply, the conduction state of the BMS remains unchanged during microcontroller restarts or upgrades.

Slkor Medium Voltage MOSFET SL20N10 product photo

The SL20N10 is an N-channel MOSFET with a 100V drain-source voltage and 20A continuous drain current, renowned for its low on-state resistance (70Ω at 10V) and low threshold voltage (1.5V at 250uA). These characteristics make the SL20N10 an ideal switch and signal processing component in the battery management system of pure electric buses, especially in applications that require high efficiency and high-precision control.

Slkor Medium Voltage MOSFET SL20N10

First and foremost, the Medium-Voltage MOSFET SL20N10 boasts exceptional on-state resistance, thanks to its ultra-high design and suitability for extremely low RDS(ON). When conducting, it can generate minimal resistance, thereby reducing energy losses and enhancing overall efficiency. This is crucial for applications that require high efficiency and low power consumption, such as electric vehicles, power management, and battery protection. Additionally, the ultra-high design ensures that the MOSFET can maintain stable performance even under extreme conditions of high voltage and current, further enhancing its reliability and applicability.

Furthermore, another key feature of the SL20N10 is its maximum DC current capability. In practical terms, this means the MOSFET can safely handle up to 20A of direct current without overheating or damage. This feature makes the MOSFET suitable for various circuits and applications that require handling substantial currents, such as motor drives, lighting control, and industrial automation. In these scenarios, the SL20N10 can effectively control and manage currents, ensuring stable operation and high performance of the circuits.

Parameters of Slkor Medium Voltage MOSFET SL20N10

With the continuous advancement of electric vehicle technology, the demand for Battery Management Systems (BMS) is also increasing. In the future, the application of Medium-Voltage MOSFETs in BMS will become more extensive and profound. On one hand, with the emergence of new materials and processes, the performance of Medium-Voltage MOSFETs will be further enhanced, with faster switching speeds, lower power consumption, and higher reliability, better meeting the requirements of BMS for high-precision control and efficient operation. On the other hand, as intelligent and networked technologies continue to develop, BMS will achieve more intelligent fault prediction and health management functions. Medium-Voltage MOSFETs, as key components, will play a more critical role in realizing these functions.

In conclusion, as a crucial representative of power electronic components, Medium-Voltage MOSFETs play a vital role in the Battery Management Systems of electric buses. By continuously optimizing and improving the performance and application level of Medium-Voltage MOSFETs, we can drive the continuous development of electric bus technology, bringing more innovation and transformation to people's modes of transportation. Slkor (www.slkoric.com), as a company focusing on the power semiconductor field, will continue to play an important role with its products including power devices, transistors, connectors, supporting not only the rapid development of contactless technology but also contributing to the construction of a more intelligent, convenient, and secure future life.

Slkor Honors and Achievements

About Slkor：

Slkor (www.slkoric.com) offers a range of high-end products including silicon carbide (SiC) diodes, SiC MOSFETs, IGBTs, fifth-generation ultra-fast recovery power diodes, and more, catering to industries such as new energy vehicles, high-end equipment, communication power devices, solar photovoltaics, medical equipment, and industrial automation. Their general-purpose products include Schottky diodes, ESD protection diodes, TVS transient suppression diodes, general-purpose diodes, and transistors. They also provide power devices such as high, medium, and low-voltage MOSFETs, silicon-controlled rectifiers, bridge stacks, as well as power management chips like LDOs, AC-DC converters, ADC chips, along with complementary products like Hall sensors, high-speed optocouplers, crystal oscillators, and more. These products find wide applications in smartphones, laptops, robots, smart homes, IoT, LED lighting, consumer electronics, wearable devices, and various other smart interconnected products!

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