一种无线传输的蓄电池健康状态实时监测系统
By combining passive sensing nodes and centralized gateways with piezoelectric materials and thermoelectric generators, the power supply and safety issues of the subway battery monitoring system have been solved, achieving efficient and reliable real-time monitoring of battery health status and improving the safety and reliability of subway operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN FENGRI ELECTRIC GROUP
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-17
AI Technical Summary
The existing subway battery monitoring system suffers from unreliable power supply, cumbersome wiring and maintenance, slow fault clearing, and lacks deep integration with the train safety bus, posing safety hazards.
It employs passive sensor nodes, a centralized gateway, and a safety redundancy circuit. It utilizes piezoelectric materials and thermoelectric generators to power the system by combining subway vibration and temperature difference energy. It integrates analog front-end circuitry and internal resistance measurement to achieve wireless transmission and safety redundancy design.
This enables long-term stable power supply to passive sensing nodes, improves signal processing accuracy and fault response speed, ensures high system reliability and safety, and reduces maintenance costs.
Smart Images
Figure CN224518931U_ABST
Abstract
Claims
1. A wireless transmitted battery state of health real-time monitoring system, characterized in that, include: A passive sensing node (1) includes a sensor (11), an analog front-end circuit (12), and a wireless transmission module (13). The output terminal of the sensor (11) is connected to the input terminal of the analog front-end circuit (12), and the output terminal of the analog front-end circuit (12) is connected to the input terminal of the wireless transmission module (13). The energy harvesting circuit (2) includes a piezoelectric material, a rectifier and an energy storage unit. The output end of the piezoelectric material is connected to the input end of the rectifier. The output end of the rectifier is connected to the input end of the energy storage unit. The output end of the energy storage unit is connected to the input end of the power supply of the passive sensing node (1). The centralized gateway (3) includes a receiver chip and a processor. The output of the receiver chip is connected to the input of the processor. The receiver chip is wirelessly connected to the wireless transmission module (13). Safety redundancy circuit (4), whose input is connected to the output of the processor and whose output is connected to the vehicle safety bus.
2. The wireless transmitted battery state of health real-time monitoring system of claim 1, wherein: The sensor (11) includes: A voltage sensor (11) is connected to the input terminal of the analog front-end circuit (12) via a wire to collect the voltage data of the storage battery. The current sensor (11) has its output terminal connected to the input terminal of the analog front-end circuit (12) via a wire, and is used to collect the current data of the storage battery. A temperature sensor (11) is connected to the input of the analog front-end circuit (12) via a wire to collect the temperature data of the battery.
3. The wireless transmitted battery state of health real-time monitoring system of claim 1, wherein: The analog front-end circuit (12) includes an amplifier, a filter, and a comparator; The input terminal of the amplifier is connected to the output terminal of the sensor (11), and the output terminal of the amplifier is connected to the input terminal of the filter; The output of the filter is connected to the input of the comparator, and the output of the comparator is connected to the input of the wireless transmission module (13).
4. The real-time monitoring system for battery health status via wireless transmission according to claim 1, characterized in that: The piezoelectric material in the energy harvesting circuit (2) has a sheet structure, and its output end is connected to the input end of the rectifier. The output end of the rectifier is connected to the input end of the energy storage unit. The energy harvesting circuit (2) also includes a thermoelectric generator and a power management module; the hot end of the thermoelectric generator is attached to the battery casing through a thermally conductive material, the cold end is connected to a heat sink, and the output end is connected to the input end of the rectifier; the energy storage unit is a capacitor, and its output end is connected to the input end of the power management module, and the output end of the power management module is connected to the input end of the passive sensing node (1).
5. The wireless transmitted battery state of health real-time monitoring system of claim 1, wherein: The wireless transmission module (13) includes a transistor and an antenna; The transistor control pin is connected to the output of the analog front-end circuit (12), the power supply pin is connected to the output of the energy storage unit, and the output pin is connected to the input of the antenna. The antenna has a serpentine structure and is wirelessly connected to the receiving chip of the centralized gateway (3).
6. The wireless transmitted battery state of health real-time monitoring system of claim 1, wherein: The centralized gateway (3) also includes an internal resistance measurement unit; The internal resistance measurement unit includes a shunt and an amplifier. The shunt is connected in series in the battery circuit, and its two ends are connected to the input terminal of the amplifier. The output terminal of the amplifier is connected to the input terminal of the processor.
7. The wireless transmitted battery state of health real-time monitoring system of claim 1, wherein: The safety redundancy circuit (4) includes a comparator and a relay; The input of the comparator is connected to the output of the processor, and the output is connected to the coil pin of the relay. The normally open contact of the relay is connected in series in the vehicle safety bus.