Overview of multi-string battery protection chip manufacturers

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Overview of multi-string battery protection chip manufacturers [Copy link]

A battery pack with 4 to 6 strings can achieve fast charging with a buck-boost or buck-boost circuit. In addition, the introduction of USB PD3.1 supports 48V output voltage and 240W output power. With a suitable buck-boost chip, outdoor power supplies can achieve higher-power PD fast charging.

Lithium battery protection chips are used in multi-string battery packs. They need to detect the voltage of each battery in the battery pack independently to provide overcharge and over-discharge protection for the battery. When the voltage of a single battery cell and the total voltage of the battery pack are abnormal, or the temperature is abnormal, the connection between the battery and the circuit needs to be cut off in time to protect the safety of the battery pack and electrical equipment.

Currently, six manufacturers including Silergy, Jewatt, Chuangxinwei, Ingenic, Yutai and Saiwei have launched 30 lithium battery protection chips, covering the application of 3-18 battery strings, and all are suitable for lithium-ion battery packs and lithium iron phosphate battery packs. Among them, 4-string lithium battery protection chips are suitable for 300-600W outdoor power products, and more than 4 strings of lithium battery protection chips can be used for outdoor power supplies with a power of more than 1000W.

According to data from research institutions, the market size of the portable energy storage power supply industry has reached 19.5 billion yuan in 2020, and is expected to exceed 28 billion yuan by 2025. In addition, according to industry insiders, global outdoor power supply sales have exceeded 10 million units in 2021, and major leading companies in the outdoor power supply industry have made a lot of money. At the same time, many domestic battery industry giants have successively entered the outdoor power supply product market and become heavyweight players in the outdoor power supply industry.

Fred_1977

Yes, these are all domestically produced chips, and domestically produced chips have gradually occupied a relatively large market share in China.

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Silergy has launched three multi-string lithium battery protection chips with built-in balancing function, namely SY68920 supporting 3-6 strings of batteries, SY68930 supporting 6-12 strings of batteries, and SY68940 supporting 9-18 strings of batteries, which can meet the needs of system applications such as power tools, electric bicycles, and lithium battery energy storage.

Silergy's series battery monitoring solution supports lithium battery pack discharge overcurrent, discharge short circuit, battery pack single/total voltage undervoltage and overvoltage protection functions, and also supports the connection of secondary protection chips. In the event of a fault, the protection chip can output alarm signals in analog and digital modes. The built-in I2C interface of the protection chip supports access to the single cell voltage, total voltage, charge and discharge current and temperature parameters of the battery pack, and its functions are very comprehensive.

Silergy SY68920 is a protection chip suitable for 3-6 series lithium battery applications. The chip has a built-in ADC to measure battery voltage, battery pack or protection chip temperature. The chip has a built-in independent ADC to detect battery pack current. Using 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 protection and battery overvoltage protection.

The chip integrates battery balancing control function and battery balancing MOS, supports alarm interrupt output, and has an I2C interface for outputting battery status information. It adopts QFN5*5-32 package.

Silergy SY68930 is suitable for 6-12 series lithium battery applications and uses QFN6*6-40 package. The chip integrates ADC to accurately measure battery voltage, battery pack or chip temperature, and is equipped with an independent internal ADC to measure battery pack current. The chip has multiple protection functions such as discharge overcurrent protection (OCD), discharge short circuit protection (SCD), overvoltage protection (OV), undervoltage protection (UV), etc.

Silergy SY68940 is suitable for 9-18 battery pack applications and uses QFN8*8-40 package. The chip has built-in ADC to measure battery voltage, battery pack or protection chip temperature. The chip has built-in independent ADC to detect battery pack current. Using 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 protection and battery overvoltage protection.

For multi-string battery applications, JWwatt has launched a series of multi-string lithium battery protection chips, including the JW3312 protection chip that supports 3-5 strings of batteries, the JW3313 battery protection chip that supports 3 strings of batteries, the JW3317 battery protection chip that supports 5-7 strings, the JW3370 battery protection chip with a digital interface that supports 4-10 strings of batteries monitoring, and the JW3410 secondary battery protection chip that supports 2-5 strings.

JW3312 is a protection chip that supports 3-5 lithium battery strings. It integrates a high-precision voltage detection circuit and supports overcharge, over-discharge, overcurrent, overheating and battery disconnection protection. JW3312 supports lithium batteries and lithium iron phosphate batteries, has 25mV overcharge voltage detection accuracy, 50mV over-discharge detection accuracy, built-in battery balancing function, and 3μA standby power consumption. JW3312 is available in TSSOP20 package, suitable for rechargeable lithium battery packs, power tools and UPS backup battery packs.

JW3313 is a protection chip that supports 3-series lithium batteries. The chip supports battery overcharge, over-discharge, over-current, battery temperature and open circuit detection. JW3313 supports lithium iron phosphate and lithium battery applications, has 25mV overcharge detection accuracy and 80mV over-discharge detection accuracy, has three-stage over-current protection, built-in high-precision battery temperature detection, supports battery overheating and over-cooling protection, and has 1.5μA standby power consumption. JW3313 uses MSOP10 package and supports rechargeable lithium battery packs, power tools and other applications.

JW3410

JW3410 is a secondary protection chip that supports 2 to 5 lithium battery strings. It integrates a high-precision voltage detection circuit for lithium battery overcharge protection. The built-in high-precision voltage detection circuit has a 20mV accuracy, 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 an independent pin for overvoltage signal output. The chip automatically monitors the battery voltage. When overcharge or disconnection occurs, the control signal is output after a delay, which can be used to control the MOS tube or three-terminal fuse to cut off the circuit connection to ensure battery safety. JW3410 has a power consumption of 3μA and uses MSOP8 package. It is suitable for rechargeable lithium battery packs, power tools and laptop battery voltage monitoring.

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ICM

Chuangxinwei has launched a 4-13 series lithium battery protection chip for multi-string battery packs for outdoor power supplies. It is divided into full protection without balancing function and full protection with balancing function. The secondary protection chip has overcharge protection and complete overcharge, over-discharge + temperature protection functions, which can realize dual protection functions and further improve the safety of the battery pack.

Chuangxinwei CM1041

Chuangxinwei CM1041 series is a protection chip dedicated to 4-series lithium/iron batteries. It has built-in high-precision voltage detection circuit and current detection circuit. By detecting the voltage, charge and discharge current and temperature of each battery, it realizes battery overcharge, overdischarge, discharge overcurrent, short circuit, charge overcurrent, overtemperature and other protection functions. The overcharge, overdischarge and overcurrent protection delay can be adjusted through external capacitors.

Chuangxinwei CM1341

Chuangxinwei CM1341 series is a protection chip dedicated to 4-series lithium/iron batteries, with built-in high-precision voltage detection circuit and current detection circuit. By detecting the voltage, charge and discharge current and temperature of each battery, it realizes battery overcharge and overdischarge balance, disconnection, low voltage charging prohibition, discharge overcurrent, short circuit, charge overcurrent and overtemperature protection functions. The discharge overcurrent protection delay is adjustable by external capacitor, and other protection delays are built-in.

Chuangxinwei CM1051

Chuangxinwei CM1051 series is a protection chip dedicated to 5-series lithium batteries or polymer batteries. It has built-in high-precision voltage detection circuit and current detection circuit. By detecting the voltage, charge and discharge current and temperature of each battery, it realizes battery overcharge, over discharge, discharge overcurrent, short circuit, charge overcurrent, overtemperature and other protection functions. The overcharge, over discharge and overcurrent protection delay can be adjusted through external capacitors.

Chuangxinwei CM1361

Chuangxinwei CM1361 series is a protection chip dedicated to 6-series lithium/iron batteries, with built-in high-precision voltage detection circuit and current detection circuit. By detecting the voltage, charge and discharge current and temperature of each battery, it realizes battery overcharge, over-discharge balance, disconnection, low-voltage charging prohibition, discharge overcurrent, short circuit, charge overcurrent and over-temperature protection functions. The discharge overcurrent protection delay is adjustable by external capacitor, and other protection delays are built-in.

Chuangxinwei CM1250

The CM1250 series of products from Chuangxinwei have built-in high-precision voltage detection circuits and delay circuits. It is a secondary protection chip for rechargeable batteries. It provides overcharge protection for the battery pack by detecting the voltage of each cell in the battery pack.

Chuangxinwei CM1270

The CM1270 series of products from Chuangxinwei have built-in high-precision voltage detection circuits and delay circuits. It is a secondary protection chip for rechargeable batteries. It provides overcharge protection for the battery pack by detecting the voltage of each cell in the battery pack.

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INJOINIC

Ingenic has launched five outdoor power lithium battery protection chips that support 2-10 lithium battery applications, can meet the application of polymer lithium batteries and lithium-ion battery packs, and can provide over-current, over-voltage and over-discharge protection for battery packs.

The IP3254 battery protection chip from Ingenic uses a TSSOP16 package and supports lithium iron phosphate and lithium battery applications. There are multiple models to choose from depending on the battery voltage, fully meeting the needs of various battery applications. It can be used not only for built-in battery protection functions in mobile power supplies, but also for low-power outdoor power supplies.

Ingenic IP3254 supports lithium battery overcharge, over-discharge, discharge overcurrent, and charge overcurrent protection. The internal integrated balancing circuit can achieve battery charging balancing without external components, and supports external MOS to increase battery balancing current.

Ingenic IP3255

The IP3255 series from Ingenic has built-in high-precision voltage detection circuit and delay circuit. It is an IC for protecting 3 or 4 lithium-ion/polymer rechargeable batteries in series. By switching the SEL terminal, it can be used to protect 3 or 4 batteries in series. It has built-in NTC high and low temperature protection function for charging and discharging.

Ingenic IP3259

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The IP3259 series of Ingenic has built-in high-precision voltage detection circuit and delay circuit, and is an IC for protecting 3/4/5 series lithium-ion and polymer rechargeable batteries. The IP3259 has built-in battery charge balancing function, which effectively reduces the battery voltage mismatch caused by inconsistent battery parameters and aging, and prolongs the battery life. The chip also has built-in charging and discharging NTC high and low temperature protection function. The number of protected battery cells can be increased by chip cascading.

Ingenic IP3267

The IP3267 series of Ingenic has built-in high-precision voltage detection circuits and delay circuits. It is an IC for protecting 5-10 series lithium-ion, polymer and lithium iron phosphate rechargeable batteries. The IP3267 has built-in high-precision detection circuits, supporting overvoltage, undervoltage, three-stage over-discharge current protection, charging overcurrent protection, disconnection detection protection and battery balancing functions. The built-in balancing circuit can achieve battery charge and discharge balancing without any peripheral components, and can also expand the MOS tube to increase the balancing current. The IP3267 has built-in charge and discharge NTC detection circuits to protect the battery from high and low temperatures.

ETA Yutai

Yutai Semiconductor has launched a battery balancing chip for multi-string lithium battery applications.

Yutai ETA3001

Yutai ETA3001 is an inductive battery balancer in DFN2x2 package. Unlike traditional passive balancing technology, the chip uses a control scheme with an inductor to stir the current between the two cells until the cells reach balance. Due to the switching characteristics, the heat and power loss generated by traditional linear balancing technology are greatly reduced; due to the higher balancing current not limited by package heat dissipation, the balancing time is also significantly shortened.

The ETA3001 consumes only 2uA of ultra-low current from the battery in standby mode, extending the storage time of the battery. The final balanced voltage of the two batteries is also very accurate, which improves the performance and life of the series-connected batteries. The ETA3001 can also be used for multiple cell stacks with an even number of cells. The ETA3001 has a protection function similar to pre-conditioning in battery charging, that is, when the voltage of one battery is significantly lower than that of the other, the balancing current is reduced to a safe level until the battery with the lower voltage is charged.

ETA Yutai

Yutai Semiconductor has launched a battery balancing chip for multi-string lithium battery applications.

Yutai ETA3001

Yutai ETA3001 is an inductive battery balancer in DFN2x2 package. Unlike traditional passive balancing technology, the chip uses a control scheme with an inductor to stir the current between the two cells until the cells reach balance. Due to the switching characteristics, the heat and power loss generated by traditional linear balancing technology are greatly reduced; due to the higher balancing current not limited by package heat dissipation, the balancing time is also significantly shortened.

The ETA3001 consumes only 2uA of ultra-low current from the battery in standby mode, extending the storage time of the battery. The final balanced voltage of the two batteries is also very accurate, which improves the performance and life of the series-connected batteries. The ETA3001 can also be used for multiple cell stacks with an even number of cells. The ETA3001 has a protection function similar to pre-conditioning in battery charging, that is, when the voltage of one battery is significantly lower than that of the other, the balancing current is reduced to a safe level until the battery with the lower voltage is charged.

Cellwise

Saiwei Micro Electric has launched 5 lithium battery protection chips to meet the application of 3 to 10 lithium batteries and lithium iron phosphate batteries. The protection chip can provide overcharge, over-discharge, overcurrent protection and balancing functions for the battery, and supports external thermistor to detect battery temperature, providing battery temperature protection function to ensure that the battery is used within a safe temperature range. The chip has a built-in balancing function, which can eliminate battery imbalance caused by battery self-consumption and high-rate charge and discharge, thereby extending the service life and endurance of the lithium battery pack and fully releasing the battery capacity.

Saiwei CW1244

Saiwei CW1244 series products are highly integrated 3~4 series lithium-ion battery or lithium polymer battery protection chips, which can provide overcharge, over-discharge, charge and discharge over-current, disconnection, charge and discharge over-temperature protection and balancing functions for the battery pack.

Detailed specifications of Saiwei CW1244.

Related reading:

1. Disassembly report: Yubo 300W portable energy storage power supply

Saiwei CW1353

Saiwei CW1353 series products are lithium battery protection chips with built-in high-precision detection circuits and delay circuits, suitable for 4-5 series lithium-ion batteries or lithium polymer battery packs. It provides lithium battery packs with overcharge detection, over-discharge detection, over-current detection, balancing, disconnection detection, and high and low temperature protection for charge and discharge.

Saiwei CW1353 has built-in MOSFET driving function and supports external PWM signal to control DO terminal output through DCTRL terminal to realize motor speed regulation and soft start function.

The CW1274 series of products from Saiwei are highly integrated 4~7 series lithium-ion battery or lithium polymer battery protection chips. Saiwei CW1274 provides overcharge, over-discharge, charge and discharge over-current, disconnection, charge and discharge over-temperature protection and balancing functions for the battery pack, and supports chip cascading.