Battery Management System(BMS)
■ Circuit block
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Battery temperature measurement
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- Temperature measurements
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NTC thermistor (chip type)RecommendedERTJ-M series 1005 sizeHigh heat resistance High reliability＜Feature＞
- ❶ A thermistor is small, highly resistant to heat, and is formed by an original technique that offers high reliability, thus contributing to highly precise temperature compensation in the circuit.
Cell balance adjustment circuit
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- Suppressing gate-driving noise by the switching element
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Chip resistor (high-precision chip resistor / small and high-power chip resistor)＜Feature＞
- ❶ Contributes to mechanical and electrical integration of in-vehicle units in harsh thermal environments and improved set reliability with excellent heat resistance and thermal shock resistance.
- ❷ With its original resistance pattern, electrode structure, etc., the chip resistor is small in size and yet handles high-power operations, thus contributing to a reduction in the size of the circuit.
Voltage measurement
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- Voltage measurement on the battery module and BMS unit
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Chip resistor (high-precision chip resistor)RecommendedERA*A ERA*V/K/P /ERJPBHigh precision＜Feature＞
- ❶ A chip resistor with a thin-film structure offers a small resistance tolerance and a low TCR, contributing to high-precision control of the output characteristics of the circuit.
DC/DC converter
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- Noise reduction, switching, and smoothing
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Conductive polymer hybrid aluminum electrolytic capacitor＜Feature＞
- ❶ Its high capacitance, low ESR, and high ripple performance contribute to circuit miniaturization and higher power features (low voltage and high current).
- ❷ Improved capacitance characteristics at high frequencies contribute to the elimination of noise, including high frequency components generated by high frequency switching of circuits over a wide band of frequencies.
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- Voltage conversion
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Automotive power inductorRecommendedLP seriesLarge Current Low DCR＜Feature＞
- ❶ Contributes to circuit miniaturization and higher power features (low voltage and high current) due to the low loss and high current performance of metallic magnetic materials.
- ❷ Improved loss characteristics (low ACR) at higher frequencies contribute to the suppression of losses in high frequency switching circuits.
Transceiver I/F
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- Static electricity measures
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Chip varistorRecommendedEZJP series 1005 sizeSmall size high performance＜Feature＞
- ❶ Contributes to the suppression of electrostatic (ESD) noise while maintaining circuit communication quality with a lineup of products having a wide range of capacitance characteristics.
- ❷ Chip varistors support low to high communication speeds with capacitance characteristics ranging from 8 to 250 pF.
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