As the energy center of power plant and substation, DC system provides reliable DC power for control circuit, signal circuit, emergency lighting circuit, relay protection device, automatic device and inverter power supply, which plays an important role in ensuring the safe operation of all primary and secondary equipment in substation. The battery is one of the core components of the DC system. When there is a big accident in the power grid, the DC system will be powered by the battery discharge. Therefore, the reliable operation of the battery will be the last protection line in the whole DC system.
The traditional battery has many shortcomings: too many batteries in series charging, it is easy to appear the problem of uneven charge and discharge of each battery; the battery in series operation, the consistency of the battery monomer is very high; the battery in series can not carry out online capacity checking and online replacement maintenance. In order to solve the above problems, a scheme of DC system using battery parallel power supply is proposed. The parallel battery scheme makes the battery life longer, the operation and maintenance cost lower, and the reliability higher.
Wide input voltage and high degree of automation;
Module with short circuit protection, automatic recovery; primary isolation, high isolation strength, stable and reliable; overvoltage protection, protection of battery and system electrical equipment.
The terminal connection mode is convenient for installation and use, and the maintenance is simple. After power transmission, there is no need for manual intervention;
High power output (3.5 times of rated power can be output for a long time when the mains and battery are powered at the same time, and 2.5 times of rated power can be output for a long time when the single battery is powered), with strong load carrying capacity, suitable for impact load or inductive load;
Over temperature protection to avoid long-term overheating operation and improve the service life of the device;
External battery, flexible configuration; automatic three-stage charging, regular activation of the battery, greatly improving battery life;
The end user can directly replace the DC screen to help customers reduce the cost;
Intelligent high frequency power supply technology, self monitoring, self diagnosis, local display, alarm, network communication, realize unattended automatic remote management;
High efficiency, charger efficiency is more than 90%;
High power factor, greater than 0.99, low total harmonic distortion of input current;
Digital current sharing technology is adopted, and the non-uniform current degree of parallel operation is less than ± 5%;
The charging module is equipped with battery anti reverse function, which will alarm automatically when the battery is connected reversely, and the module will not work;
The LCD is used to display the module output voltage, output current, battery voltage, battery current (distinguish the current direction by ± 1), battery capacity, battery temperature, battery floating charge status, etc. It has the function of 0.1C on-line automatic capacity checking and automatic full capacity checking.
Company Introdction
Tonhe is a high technology enterprise specialized in innovation of technology, product and management in the power electronics industry, and R & D, manufacturing ,sales, operation and service of EV charger module&rapid charger point and related products , providing customers with system solution for the energy sector. Tonhe was established in 1998 and got listed in 2015 with stock code 300491.
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