Lithium batteries have the outstanding advantages of high voltage platform, large energy density and long life, and are widely used by mobile phones, laptops and other portable devices once they are born. Multi-string lithium battery packs can output more power, which is used for mobile power and energy storage purposes, light and compact, and meets the application needs of different occasions.
The use of lithium batteries is inseparable from the protective plate on the battery pack. The protection board is composed of a protection chip and a MOS tube, real-time detection of battery terminal voltage and current, in the event of battery overvoltage, undervoltage or overcurrent, the protection chip controls the MOS tube, timely disconnection of the battery and the circuit connection, to prevent the battery in abnormal circumstances of danger.
For multi-string battery applications, Jett has launched a series of multi-string lithium battery protection chips, namely JW3312 protection chips that support 3-5 strings of batteries, JW3313 battery protection chips that support 3 strings of batteries, JW3317 battery protection chips that support 5-7 strings, JW3370 battery protection chips with digital interfaces, JW3370 battery protection chips that support 4-10 string battery monitoring, and secondary side battery protection chips that support 2-5 strings JW3410.
The first to be introduced is the JW3312.
JW3312 is a protection chip that supports 3, 4, 5 strings of lithium batteries, and integrates high-precision voltage detection circuits to support overcharge, overdischarge, overcurrent, overheating and battery disconnection protection. JW3312 supports lithium batteries and lithium iron phosphate batteries, with 25mV overcharge voltage detection accuracy, 50mV overdischarge detection accuracy, built-in battery balancing function, with 3μA standby power consumption. The JW3312 is available in a TSSOP20 package for rechargeable lithium battery packs, power tools, and UPS backup battery packs.
JW3313 is a protection chip that supports 3 strings of lithium batteries, the chip supports battery overcharge, overdischarge, overcurrent, battery temperature and open circuit detection. JW3313 supports lithium iron phosphate and lithium battery applications, with 25mV overcharge detection accuracy and 80mV overdischarge detection accuracy, with three-stage overcurrent protection, built-in high-precision battery temperature detection, support battery overheating and overcooling protection, with 1.5μA standby power consumption. The JW3313 is available in an MSOP10 package to support rechargeable lithium battery packs, power tools, and other applications.
JW3317 is a protection chip that supports 5, 6, and 7 strings of lithium batteries, supports cascaded applications, and meets the protection function of 14 strings of batteries. The chip has built-in perfect battery protection function, with 20mV battery overcharge detection accuracy and 80mV battery overdischarge protection accuracy, supports the choice of four-stop charging overcurrent detection, supports three-level over-discharge current delay, and has a high-precision battery temperature detection function to prevent the battery from charging at high and low temperatures, and to prevent battery discharge from overheating.
The JW3317 is available in a TSSOP-24 package and supports rechargeable lithium battery pack applications, electric bicycle applications, and backup battery system applications. Cascading multiple strings can be used to meet hybrid vehicle applications.
The JW3370 is a protection chip that supports 4-10 strings of lithium batteries, with a built-in 14-bit ADC for battery voltage and temperature acquisition, and a 16-bit ADC for battery charge and discharge current acquisition. The JW3370 supports battery balancing to extend the life of the battery pack. The JW3370 supports communication with an external microcontroller via the SPI bus to detect battery voltages in a series battery pack.
JW3370 supports battery overcharge, overdischarge, high and low temperature, overcurrent and monomer open circuit protection, JW3370 supports sleep mode and transport mode to reduce the battery pack in inventory and transportation of power loss. With 15μA sleep current and 3μA transport current, the JW3370 is available in a TSSOP38 package to support e-bike, backup battery applications, and hybrid vehicle applications.
JW3410 is a secondary protection chip that supports 2 to 5 strings of lithium batteries, and integrates a high-precision voltage detection circuit for lithium battery overcharge protection. The built-in high-precision voltage detection circuit has an accuracy of 20mV, supports lithium iron phosphate and lithium battery overvoltage protection, supports high-voltage lithium battery applications, and has different release thresholds and action delays.
JW3410 has independent pins for overvoltage signal output, the chip automatically monitors the battery voltage, when there is an overcharge or disconnection, after a delayed output control signal, can be used to control the MOS tube or three-terminal fuse, cut off the circuit connection, to ensure battery safety. The JW3410 has 3μA power consumption in an MSOP8 package and is suitable for voltage monitoring of rechargeable lithium battery packs, power tools and notebook computers.
Charging head net summary
With the development of new energy technology, lithium batteries, as an excellent energy carrier, have been widely used in a variety of applications. As a partner for lithium battery safety applications, the lithium battery protection board has evolved from the traditional overcharge and over-discharge protection to support higher accuracy and support the battery balancing function, providing a comprehensive protection function for the battery.
The protection chip introduced by Jiehuate for outdoor power supply and lithium battery energy storage applications has a high-precision overcharge protection function and supports cascade operation to meet higher voltage applications. JW3370 supports digital interface communication, which can output battery voltage information to meet the needs of reading the monomer voltage in a multi-string battery pack and fully understand the battery status.