The Road To New Energy Security: Minyuan Sensor Temperature Chip Helps Charging Piles To Realize Intelligent Temperature Monitoring

Overview

With the rapid expansion of the new energy vehicle market, the construction of charging piles has flourished nationwide.The state and governments have also introduced a series of encouraging policies to promote the construction of charging infrastructure to meet increasingly growing vehicle charging needs.The popularity of charging piles not only makes new energy vehicles more convenient, but also has made positive contributions to the advancement of environmental protection.

However, in recent years, the frequent accidents such as the explosion of fire in charging piles and spontaneous combustion during vehicle charging have caused concentrated attention from fire safety such as new energy vehicles, lithium batteries and their charging equipment.Under the vigorous development of new energy vehicles, charging piles, as one of its important infrastructure, their reliability and safety are the top priority.Improper temperature control during the charging process may cause the battery to overheat, which in turn causes fire or explosion, which has a serious threat to people's life and property security.

The frequency of the safety of charging pile has attracted widespread attention, especially temperature control,CircuitShort -circuit and voltage fluctuations may lead to the monitoring and treatment of serious consequences.Therefore, a reliable monitoring solution is urgently needed to discover the temperature abnormal temperature in time to ensure the safety and stability of the charging process.

In order to ensure the safety of electricity consumption, we need to monitor the temperature of the charging piles in real time. When the temperature is found abnormal, it is quickly taken to take measures, such as cutting off the power supply circuit, a warning, and reporting to the cloud in time.In response to the needs of the temperature detection of charging piles, Minyuan sensing development and optimization of temperature sensing chips（In order to meet the requirements of different users, Minyuan temperature chips have a variety of optional packaging. For details, please refer to the post -selected tables to facilitate the selection of the user.）It is used to realize the real -time temperature monitoring of charging piles, charging gun interfaces, and tram batteries.This technology can not only detect abnormal temperature in time, but also have functions such as ultra -high temperature alarm and integrated rapid power off -power off, which effectively prevents the risk of spontaneous combustion of vehicle equipment.

Through the sensing of MinyuanM1601BIn the application of temperature sensing chips, we can achieve comprehensive monitoring of the temperature of charging piles and charging guns, and timely discover and cope with the temperature abnormal conditions, thereby ensuring the safety and stability of the charging process.At the same time, the efficient application of this technology has also provided reliable guarantee for the development of new energy vehicles and promoted the sustainable development of the new energy vehicle industry.

Temperature sensor installation location

The Minyuan temperature sensor chip can be installed in the key positions inside the charging pile and charging gun, such as charging power, charging lines, and battery connectors to monitor the temperature of these components in real time.Each sensor is equipped with a unique encoding, which can distinguish different sensors by reading encoding, and then obtain temperature data in various regions.

1.The temperature detection of the IGBT module in the charging pile

2.Temperature detection of charging pile wiring seat

3.Temperature detection of charging gun wiring terminal

4.Temperature detection of charging gun wiring port

Minyuan temperature sensor characteristics

The temperature sensing principle of Minyuan digital temperature sensor is based on CMOSsemiconductorThe characteristic relationship between the temperature of the PN section and the gap voltage, after a small signal amplification, modulus conversion, and digital calibration compensation, through the digital bus output.The sensor has the advantages of high accuracy, low power consumption, good consistency, fast temperature measurement speed, flexible programming configuration, and long life.In addition, the sensor also has the ability to fight 8KV contact discharge and 15kV non -contact discharge, and has excellent stability and durability.

The main advantages are as follows:

1. High accuracy: The digital temperature sensor chip has high measurement accuracy and stability, and the accuracy can reach ± 0.5 ° C, which can provide accurate temperature measurement results.
2. Gaspit temperature measurement range: It can cover a wide range of temperature measurement, from -70 ° C to+150 ° C to meet the needs of a variety of application scenarios.
3. High reliability: Minyuan temperature sensor adopts solid -state sensor technology, without active components, is not easy to damage or fails, and passes the ESD and aging tests to ensure its reliability.*
4. Low power consumption: Digital temperature sensor chips usually have low power consumption, suitable for occasions with restrictions on power consumption, such as portable devices, wireless sensing networks, etc.
5. Quick response: It can achieve rapid response temperature changes and improve the real -time and accuracy of temperature monitoring.
6. High linearity: The temperature is linearly, and has the characteristics of good consistency.
7. Support user space: Built -in EEPROM, which can easily store user data and provide flexibility and convenience.
8. Support -level joint network: Single bus supports a bus multi -point network network to facilitate the expansion and management of the system.

* Remark:

JEDEC JESD22-A113i -2020 "Pre-processing (PC) before reliability test (PC)"

Jedec Jesd22-A110E-2015 "High Acceleration temperature and humidity stress test (HAST)"

JESD22-A108F -2017 "Temperature, Bias and Work Shoushore" high-temperature work life test (HLOT)

Si/ESDA/JEDEC JS001-2017 "Static Discharge Sensitivity Test-Human Model (HBM)-Component Class"

ANSI/ESDA/JEDEC JS001-2017 "For Electrostatic Discharge Sense Testing Human Body Model (HBM) Component Level human model Static discharge sensitivity test--Componentgrade"

JESD78E 《IC Latch-Up Test》 （integrated circuit闩 Lock test)

ESDA/JEDEC JS-002-2014《Orion CDM(N-CDM)》

andNTC sensor technology comparison

NTC heat sensitivityresistanceMetal oxides are usually made of metal oxides. The main ingredients include manganese, cobalt, nickel and copper and other metals.These metal oxides are manufactured by ceramic technology.Similar to semiconductor materials such as 锗 and silicon, these metal oxides show consistency in conductive methods.When the temperature is low, the number of loads (electrons and caves) of these oxide materials is small, so its resistance is higher; when the temperature rises, the number of loads of oxide materials increasesreduce.

1. Nonlinear characteristics: The resistance value of NTC thermistor is not linear with temperature changes, which means that within a certain temperature range, the resistance of the resistance corresponding to the temperature change is not linear.This non -linear characteristics may make more complex calibration and compensation in some application scenarios.
2. Temperature response time is long: Because the thermal resistance itself has a large thermal capacity, its temperature response time is relatively long.This means that when temperature changes, the resistance of the resistance value of thermal resistance requires a certain time to reach a stable state, so the real -time nature of temperature monitoring may not be high.
3. Analog output: NTC thermal resistance usually has analog output, which means that it needs to be usedAnalog circuitTo convert the output signal into digital signals for processing.Compared with the sensor of digital output, this increases the complexity of data collection and processing, and may require additional simulation电路设计And debug.
4. The collection circuit is complicated: Due to the non -linear characteristics of NTC thermistor, its output signals need to be transformed and calibrated to ensure accurate temperature measurement.Therefore, the circuit for designing and processing these signals may be more complicated, and more device and technical support requires.
5. Limited temperature: Although the NTC thermistor can provide high accuracy and sensitivity within a certain range, its reliable working range is limited.Under extreme temperature conditions, such as ultra -low temperature or ultra -high temperature environment, thermistor may lose accuracy and stability.
6. Temperature drift: The resistance value of the NTC thermistor is drifting over time and conditions of use.This temperature drift may be caused by factors such as aging materials, circuit aging, and changes in environmental conditions, resulting in the decreased accuracy and stability of temperature measurement.
7. External environmental impact: NTC thermistor is more sensitive to the impact of the external environment.For example, affected by factors such as humidity, chemical gases, and mechanical vibrations, the performance of thermal resistance may change, which will affect the accuracy and stability of the temperature measurement.
8. Do not support more interconnection: Since NTC thermistor is usually a single sensor, not a multi -point measurement system, it does not support multi -point interconnection.This means that in applications that need to monitor multiple or multiple temperatures at the same time, multiple individual sensors may be used to increase the complexity and cost of the system.
9. high cost: Although the NTC thermistor has high cost performance in some applications, its overall cost may be relatively high due to the required complex collection circuit, long response time, and other restrictions.Especially in applications that require high precision, high reliability and large -scale temperature measurement, more expensive device and system design may be needed to further increase costs.
10. High -level functions such as user space, multi -point interconnection and other high -level functions: Because NTC thermistor resistance singlePassive components, It cannot support advanced functions.

Hardware reference design

MinyuanM1601BThe temperature sensing chip supports the parasitic power supply mode, that is, the sensor receives the command and power signal from the main controller through a single data cable, and uses these energy to measure the temperature.The picture below shows typical circuits.

In the parasitic power supply mode,M1601BThe two -line application mode is used to communicate with the host through the two lines of DQ and GND.Among them, R2 is a pull -up resistor to supply the chip, while C2 is an energy storage capacitor to store energy.In addition, R1, R3, and C1 constitute a filter circuit for filtering the noise in the signal.

In order to improve the stability and reliability of the system, the circuit also includes a set of Schottky diode D2 and D5, which is symmetrically placed, and the TVS tube D1 and D3, which constitutes a protective circuit, which effectively prevent static electricity and waves on the cables from static and waves on the cable.The surge phenomenon damage the system.In addition, D6 is placed near the temperature sensor chip as a protective device to prevent abnormal voltage fluctuations on the earth from damaging the sensor chip.

The following are the specifications of the relevant devices of the peripherals.

Note: In practical applications, the specific parameters of the resistance and capacitors of the filter circuit are affected by the cable and plug -in, and may need to be adjusted according to the actual situation.

Minyuan temperature sensor chip selection model

From cost considerations, you can select temperature chips with accuracy of ± 0.5 ° C.