Lingte launches new 18-cell battery pack monitor LTC6813

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Lingte launches new 18-cell battery pack monitor LTC6813 [Copy link]

The LTC6811 chip launched by Lingte before can only monitor 12 single-cell lithium batteries, but the current LTC6813 can finally monitor 18. In order to design BMS faster and with better quality, we have been paying attention to the new products of Lingte. Let's take a look at the characteristics of the new chip LTC6813. LTC6813 Introduction:

• Measures the voltage of up to 18 batteries in series
• 2.2mV maximum total measurement error
• Stackable architecture can support hundreds of batteries
• Built-in isoSPITM interface: 1Mb isolated serial communication uses a single twisted pair, up to 100 meters low EMI sensitivity and radiation bidirectional operation to provide wire break protection
• Measures all batteries in the system within 290μs
• Synchronized voltage and current measurement
• 16-bit delta-sigma (ΔΣ) ADC with programmable third-order noise filter
• Designed specifically for ISO 26262 compliant systems
• Passive cell balancing with programmable pulse width modulation up to 200mA (max)
• 9 general purpose digital I/O or analog inputs:
• Temperature or other sensor inputs
• Configurable as an I2C or SPI master
• 6μA Sleep Mode Supply Current
• 64-Lead eLQFP Package
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• Description
  The LTC6813-1 is a multicell battery stack monitor that measures the voltage of up to 18 series connected cells with a total measurement error of less than 2.2mV. The 0V to 5V battery measurement range makes the LTC6813-1 suitable for most battery chemistries. All 18 cells can be measured in less than 290μs, and lower data acquisition rates can be selected for high noise rejection.
  Multiple LTC6813-1 devices can be connected in series, enabling simultaneous monitoring of cells in long, high voltage battery strings. Each LTC6813-1 has an isoSPI interface for high-speed, RF-resistant, remote communications. Multiple devices are daisy-chained, and all devices are wired to a host processor. The daisy chain can operate bidirectionally, ensuring the integrity of communications, even in the event of a fault along the communication path.
  The LTC6813-1 can be powered directly from the battery pack or an isolated power supply. The LTC6813-1 has passive charge balancing for each cell and individual PWM duty cycle control for each cell. Other features include a built-in 5V regulator, 9 general-purpose I/O lines, and a sleep mode in which current consumption is reduced to 6μA.
  Applications
  • Electric and hybrid electric vehicles
  • Backup battery systems
  • Grid energy storage
  • High-power portable devices

After reading the basic introduction given by the official above, let's take a look at the reference schematic given by the official. It feels that the layout is not very complicated. It seems that the performance is better than that of LTC6811. Currently, Lingte has not provided specific design reference code support in terms of software code support. Some people have left messages on Lingte’s official website, hoping to download the source program package mentioned in the LTC6813 manual. The release of the reference routine should be soon.

littleshrimp

Good chip

alan000345

It looks good from the introduction, but the price is also very expensive. They develop new products very quickly, and it is difficult to keep up with the progress. I still think LTC6803 is more mature.