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Questions tagged [fuel-gauge]

used to indicate the level of energy contained in a storage device compared to its maximum level

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Can I power Beagle Bone Black Wireless (BBBW) with 3.7V LiPo?

This helpful question pointed me into the right direction for powering the BBB with a 3.7V LiPo battery. However, as this answer demonstrated, I won't be able to give the WiFi/BT module power in doing ...
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MAX17205 battery pack fuel gauge configuration

I am working on the fuel gauge by MAX17205 for my project. https://www.maximintegrated.com/en/products/power/battery-management/MAX17205.html I am able to communicate with the chip using I2C protocol ...
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4answers
133 views

STM32F103C8T6 - I2C communication with TI FuelGauge BQ78350

I am trying to establish communication between TI BQ78350 FuelGauge and STM32F103C8T6 using I2C/SMBus. The following is the I2C configuration used for the standard HAL I2C library. ...
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Fuel level sensor

I want to continuously monitor the fuel level in this HONDA GX35 tank, as shown below. Can anyone suggest me an appropriate sensor for this ? P.S. : The tank is very small of 0.65L capacity. :(
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1answer
140 views

NiMH Batteries and Fuel Gauge

I'm currently trying to figure out the best way to make use of my gas gauge LTC2943-1 in conjunction with my pack of NiMH batteries. I am aware that voltage alone is not a sufficient measure of the ...
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1answer
72 views

cheap charge management + protection circuit or fuel gauge + protection circuit

I would like to know if it is possible to have in the same package a fuel gauge ic + a protection circuit for lipo battery, or a charge management + protection circuit, in the same package. I have a ...
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1answer
122 views

State of charge estimation

Which is a more accurate estimation of SOC between different versions of Kalman filter vs advanced Fuel gauge ICs such as the ones from Texas Instruments (Impedance Track algorithm) or Maxim ...
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76 views

Passive Cell balancing affecting Gas Gauge Coulomb Count

I am designing a solar 7.4V Li battery charger, and want to include gas gauging, and cell balancing. If I use passive cell balancing, I waste power and cause my coulomb counter to lose count. Is there ...
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369 views

What is difference between Qmax and Design Capacity of battery parameters?

I'm working with the BQ27742-g1 (Texas Instruments) Fuel Gauge. I have some confusion about battery parameters. What is Qmax and Design capacity? Are they the same or different? What is the ...
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2answers
319 views

I2C Communication Signal Issue

hello to all, I'm working on I2C Based Communication Device bq27742-g1(Texas Instrument) Battery fuel gauge which is Slave Device address is 0xAA. I have put in the 10K pull up resistor. In this I'...
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365 views

Read Fuel Tank level voltage and send via Wifi [closed]

In most cars the fuel level is measured by a floater connected to a potentiometer and it's quite likely that the panel is reading an analogue voltage signal coming from the fuel sender unit. What ...
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1answer
418 views

Dual Fuel Senders - Shared Fuel Gauge Circuit Help

Just planning should I ever convert a car to run dual fuel i.e. Petrol and LPG/Autogas and decided I don't much like the way the gauges are done in most installations, so I decided I wanted to find a ...
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1answer
139 views

Battery SoC measurement

I am designing an instrument powered by two series AA NiMH, NiCd, or alkaline batteries, I need to display remaining battery capacity on it, so I was wondering what the best way to do it is. I ...
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1answer
232 views

Mysterious Trace in Battery Fuel Gauge Datasheet

I'm using a lipo battery in a project, and I want to include a sophisticated battery fuel gauge in my design. I have a battery input stage with a TI BQ24072 charge management IC and a linear down-...
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1answer
153 views

What makes this voltage regulator special?

I'm working on digesting the data sheet for the Texas Instruments bq34z100-g1 fuel gauge IC. I'm looking to use this chip with a 2 cell lithium polymer battery pack. If using a multi cell pack the ...