Backup Power Supply Modules with Electric Double Layer Capacitors

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Backup Power Supply Modules with Electric Double Layer Capacitors
Achieving an optimized solution by integrating the EDLC design and the module design technologies for automotive-use
Equipped with a self-diagnosis function (deterioration/failure detection, cell over-voltage protection, etc.) and ASIL compatible
Supports anti-vibration, water-proof specifications

Topics

  • 2021-08-05 Backup Power Supply Modules with Electric Double Layer Capacitors has been commercialized.

Backup Power Supply Modules with Electric Double Layer Capacitors is:

A backup power supply loading the in-house designed and high-performance EDLC for automotive use

The module uses automotive EDLC (Electrical Double Layer Capacitor) as a power storage element instead of batteries, capable of performing EDLC cell balance control, charge/discharge control, self-diagnosis function, communication functions, etc.
After confirming vehicle ignition ON condition, it starts charging of EDLC. In addition, with the module starting up, it performs self-diagnosis of EDLC condition and circuit condition. When a drop of vehicle battery voltage is detected, it moves to backup mode and starts supplying power to the system.

Structural model diagram

Structural model diagram

Circuit block diagram

Circuit block diagram

Advantage of adopting EDLC

*Comparison with the case of a battery loaded as a backup power source

  • Long operating life

    Easy maintenance-free design (expected life 15 years) by adopting a highly reliable cell of the own technology

  • High reliability

    Continuously diagnosing cell deterioration with the self-diagnosis function for preventing operation defect
    and function failure

  • Compact and high power

    Maximum discharge current per volume is around 4 to 50 times of a battery (EDLC cell)

  • Superior low-temperature performance

    Maintaining static capacitance at -30℃ almost comparable to that at normal temperature.

  • Flexibility of the mounting posision

    Possible to load in a crushable zone (trunk room, etc.)

Applications

  • Adopted case - Backup power supply of a brake system -

As a backup power supply when the main power is lost, it can maintain the brake performance same as
in normal time, thereby contributing to the construction of a safety-keeping system.

Adopted case - Backup power supply of a brake system -~

  • Application

As a backup power supply when the main power is lost,
it can contribute to the construction of a safety-keeping system

Product specifications

Product specifications (Typical part number: EUDCB07)

Appearance Appearance
Dimensions (mm) 142.0×115.5×31.0
Weight (g) 400
EDLC cell specifications ø18mm, L70mm 5S1P
Operating temperature
range (˚C )
-30 to 70
(Cabin or Trunk room)
Storage temperature
range (˚C )
-40 to 85
Operating voltage range (V) 9 to 16
Threshold value of input voltage (V)
(During backup)
11.0 to 11.7
Threshold value of input voltage (V)
(Normal time)
11.9 to 12.5
Charge current (A)
(When starting charging)
1.8, 3.6 (two step)
Charge current (mA)
(Stable time)
250 or less
(Input voltage =13V, Ta=25˚C)

*Customization is possible according to each customer request.

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