Energy Storage Systems (ESS)

Battery storage power station accompanied by solar and wind turbine power plants

The use of energy storage systems (ESS) is on the rise—increasing the availability and reliability of alternative energy sources. ESSs are used in a variety of industries and deployment environments, many that include harsh conditions. This requires ESS design to be rugged. SiTime MEMS timing products provide excellent temperature stability and resilience to environmental stressors, making them an ideal solution for ESS.

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SiTime MEMS Timing Benefits

A leader in industrial timing

Better quality and reliability

Custom configured solutions

Small form factor

Accurate and robust

Excellent stability over temperature

Better shock/vibration resistance

EMI resilience

Easy to use, built to last

No quartz reliability issues

>2 billion hour MTBF

Lifetime warranty

Energy storage systems sometimes also referred to as battery energy storage systems (BESS), are devices that enable energy from renewables, like solar and wind, to be stored and then released on demand. A typical ESS consists of a battery pack, an inverter, a power optimizer, plus a battery management system (BMS) to monitor the health of the cells.

ESS systems can be configured in four ways depending on whether they operate off grid or with a grid tie-in. The four general configurations are:

Off-Grid: AC coupled
Grid Tie-In: AC coupled
Off-Grid: DC coupled
Grid Tie-In: DC coupled

These systems need to withstand the elements as they are subjected to temperature variations, which can be extreme depending on where they are deployed. SiTime timing solutions, with temperature stability and extended temp capability, are an ideal solution whether you’re designing a BMS, an inverter, or power optimizer as shown below.

Energy Storge Systems (ESS) Block Diagrams

MEMS Timing for Energy Storage Systems (ESS)

Devices	Key Features	Key Values
Single-ended Oscillator SiT8021 1 to 26 MHz	-40°C to +85°C ±20 ppm stability 1.5 x 0.8 mm package	High reliability Extended temperature range Small footprint
Single-ended Oscillator SiT9025 1 to 150 MHz	Up to -55°C to +125°C Spread spectrum Configurable rise / fall times 2016, 2520, 3225 packages	High reliability Extended temperature range EMI Reduction
Differential Oscillators SiT9376 1 to 220 MHz SiT9377 220 to 920 MHz	Low jitter: < 150 fs RMS ^[1] ±30, ±50 ppm stability over -40 to +125°C LVPECL, LVDS, HCSL, Low-power HCSL, FlexSwing™ 2016, 2520, 3225 packages	High reliability Low jitter
Super-TCXO SiT5356 1 to 60 MHz SiT5357 60 to 220 MHz	±0.1, ±0.2, ±0.25 ppm stability ±1 ppb/°C frequency slope -40°C to 105°C Low jitter: 0.31 ps RMS ^[1] Optional voltage or digital frequency control	High accuracy Excellent frequency stability even with fast temperature gradients
32.768 kHz Oscillator SiT1811	±20, ±50, ±100 ppm stability 1.14 to 3.63 V supply < 490 nA consumption Up to -40°C to +105°C 1.2 x 1.1 mm < 115 ms startup time	Low power Small footprint Excellent stability Faster startup time than 32.768 kHz tuning-fork crystal enables faster system startup

¹ 12 kHz to 20 MHz integration range

SiTime Advantages

All SiTime devices offer the following advantages over quartz crystals, which are particularly important for Industrial applications:

Factory programmable to any frequency
Higher reliability than quartz
No activity dip or cold start issues
Wide operating temp (-40°C to 105°C)

MEMS Timing Outperforms Quartz

Higher Reliability	Better EMI Reduction
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Ultra-Low Phase Noise, 156.25 MHz	Better Vibration Resistance
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Immune to Vibration	Better Noise Rejection
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Energy Storage Systems (ESS)