The ETC (Electronic Toll Collection) non-stop toll collection system is currently the world’s advanced road and bridge toll collection method. By using microwave dedicated short-range communication between the on-board electronic tag installed on the vehicle windshield and the microwave antenna on the ETC lane of the toll station, and utilizing computer networking technology to perform background settlement processing with the bank, the goal of allowing vehicles to pay road and bridge tolls without stopping at the toll station can be achieved.
OBU (abbreviation for OnboardUnit), literally translated as vehicle mounted unit, is a microwave device that uses DSRC technology to communicate with RSU. Due to the demanding nature of in car application environments, the performance requirements for in car devices are higher than those for general electronic devices. Therefore, when designing intelligent transportation systems, considering the application environment is particularly important. According to the usage characteristics of OBU power supply in ETC, it not only needs to meet the discharge requirements of extreme outdoor weather such as winter in Northeast China (-40 ℃), summer in Southwest China (+85 ℃), and high humidity in Southeast coastal areas (85% RH); Simultaneously, it must meet the requirements of long lifespan, high reliability, safety, and environmental protection.
GPS in car positioning refers to the application of GPS (Global Positioning System) technology to car management; Since its inception, GPS has attracted numerous users with its high precision, all-weather, global coverage, convenience, and flexibility. Most GPS products will randomly provide a car power supply, so there is no need to worry about a power outage halfway through. But if there is a problem with the cigarette lighter interface or if you need to connect other products, the built-in lithium battery will come in handy. How long the battery has endurance, that is, how long the navigation device can continue to use after disconnecting the charger, is also a criterion for evaluating the quality of the navigation device. The battery life reflects the energy efficiency and overall performance of the machine. Consumers prefer navigation devices with built-in lithium batteries with a capacity of over 1000mAh when purchasing GPS, which usually provide 7-8 hours of standby time.
The company has independently developed a lithium-ion power system that can effectively meet the technical performance requirements of the battery in the application environment. The power system design includes a Battery Management System (BMS), which has functions such as monitoring, balancing, protection and alarm, SOC estimation, health management, display, intelligent communication, and data storage, ensuring the safety and reliability of battery pack use.
