With the outdoor power supply entering people's field of vision, the application of lithium battery high power is gradually popularized. Outdoor power supply, as a pioneer in the application of lithium batteries with high power, is also gradually becoming well known. As a pioneer in the application of lithium battery safety, the protection chip can cut off the connection between the battery and the outside world in time when the battery is overcharged, over-discharged, overcurrent and other abnormal conditions, so as to avoid abnormal conditions affecting battery safety and ensure the safe application of lithium batteries.
For multi-string lithium battery applications, the cell balancing function is equally important. The equalization function can reduce the charging current of the battery with too high voltage for the single unit with too high voltage in the multi-string battery pack when charging, so that the battery with the loss of power gets the full charging current, so that the voltage of the battery reaches the same, so that each battery in the series battery pack can be fully charged. Balanced charging with perfect monomer voltage detection makes multi-string lithium battery charging safer.
Moreover, the equalization function can not only eliminate the voltage imbalance in the series battery pack, but also improve the discharge capacity of the battery pack in the discharge. It avoids charging unsaturated batteries in discharge, triggers the monomer undervoltage protection, stops the output prematurely, and makes the discharge of the battery pack more complete.
Seizing the market opportunity, Silicon Jie has launched three multi-string lithium battery protection chips with built-in equalization functions, namely SY68920 that supports 3-6 strings of batteries, SY68930 that supports 6-12 strings of batteries, and SY68940 that supports 9-18 strings of batteries, to meet system applications from power tools, electric bicycles, lithium batteries and other energy storage.
Silicon Jie series battery monitoring solution supports lithium battery pack discharge overcurrent, discharge short circuit, battery pack single / total voltage undervoltage protection function, but also supports the connection of secondary protection chip, in the event of failure time, the protection chip can be analog and digital mode alarm signal output. The built-in I2C interface of the protection chip supports access to the cell voltage, total voltage, charge and discharge current and temperature parameters of the battery pack, and the functions are very comprehensive.
Silicon Jay SY68920 is a protection chip suitable for 3-6 series lithium battery applications, the chip has a built-in ADC for measuring battery voltage, battery pack or protection chip temperature. The chip contains a separate ADC to detect battery pack current, and the use of NMOS on the low side can reduce costs and improve protection board performance. The chip supports discharge overcurrent protection, discharge short circuit protection, battery undervoltage and battery overvoltage protection.
Chip internal integrated battery balancing control function, integrated battery balancing MOS, support alarm interrupt output, the chip has I2C interface, can output battery status information to the outside, using QFN5 * 5-32 package.
Silicon SY68930 is suitable for 6-12 series lithium battery applications in QFN6*6-40 package.
Silicon Jay SY68940 is suitable for 9-18 string battery pack applications in QFN8*8-40 package.
Charging head net summary
Outdoor power supply is becoming a carrier of new energy, storing electrical energy, no noise and no pollution characteristics, making the traditional fuel generator dwarfed. Outdoor power supply uses lithium battery energy storage, the choice of protection chip with equalization function, can provide perfect protection for the battery at the same time, fully release the battery capacity, improve the battery life of the product.
Silicon Lijie launched the lithium battery protection chip in the premise of supporting perfect functions, but also support the I2C interface output battery pack all the information, through the screen display, compared to the traditional solution, convenient for users to view, can fully understand the battery pack status, preventive maintenance, effectively improve the use experience.
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