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The Li-Ion rechargeable battery is managed so that it will not occur over-charged or over-discharged status. On the battery management system, there is a primary protection circuit and also the secondary protection circuit that would back up when the primary protection circuit fails. By the double protection circuit, BMS has redundancy and secures safety.
In recent years, many rechargeable battery products have the double protection circuit in order to meet the requirements of the safety standards.
Uchihashi - Three Terminal Fuse
１．Fuse off the power path physically in overvoltage status
２．Large current and high voltage rating, no required parallel use of the fuse
３．High Reliability and Durability in the battery management systems
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From December 20, 2020, manufacturers and suppliers must ensure that their audio/video (AV) devices and information and communication technology components comply with the new EN 62368-1 standard. This new, revised standard contains safety-related regulations and replaces the standards IEC/EN 60065 and IEC/EN 60950-1
This applies both to units in the devices, such as power supply modules, and to external power packs that are simply included with the devices.
In order to ensure protection against electric shock, different methods and techniques are described in the new standard. The IEC 62368-1 defines certain high-voltage tests (HiPot tests) depending on the mains voltage used for the device. That is, for example, 1.5kV for 120VAC or 2.5kV for 230VAC. These values are decisive when dimensioning the gas discharge tube between PE and L/N.
Likewise, the devices or subsystems to be certified may only have certain residual voltages after being subjected to voltage pulses (surge, eg 1.2/50-8/20μs 6kV) in order to ensure protection against overvoltage. This generally requires gas arresters with ignition voltages triggered by the HiPot test. For these reasons, the arrester is separated from PE during the HiPot test, which means an increased, mostly manual effort.
To avoid this, the BXD series gas arrester was specially developed. The HiPot test can be carried out after assembly without any additional effort. At the same time, the requirements for overvoltage protection are met.
Key Features
- Breakdown voltage (100V/s): 2,400-4,800V
- Surge discharge current: 3,000A
- Ignition voltage (1kV/µs): ≤ 2,500V
- For HiPot test ≥1,500V AC or ≥2,000V AC
- Size design: 9,0 *5,5 *7,0mm or 8,8 *6,2 *8,7mm
- High current endling capability 3kA @8/20 µs
Applications:
- Computer and network components
- Consumer electronics, audio/video
- Telecommunications and network infrastructure
- Led luminaries
- Power supply units
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E2 Series
・It has superior thermal sensitivity that suitable for the overheat protection of the parts.
・Extremely thin body as 1.1 mm thickness ensures reliability.
・It is a non-resettable thermal link that uses a fusible alloy for its thermal element.
・It is compliant with RoHS2.
Application: thin heater for auto and auto mobile
ETR
・It has superior thermal sensitivity that suitable for the overheat protection of the parts.
・Extremely thin body as 1 .1 mm thickness ensures reliability as well as reduces deterioration with age.
・It is thermal links with tab terminals can be used for spot welding.
・It is a non-resettable thermal link that uses a fusible alloy for its thermal element.
・It is compliant with RoHS2.
Application: battery cell and battery pack
Micro fuse
・It realizes fast acting and high voltage rating of 450V DC being micro size type that each side of body is 10mm or less.
・It can be mounted to printed circuit board by flow-soldering.
・It is compliant with RoHS2 and lead(Pb) free.
Application: DC motor, DC-DC converter and battery pack
Current fuse with resistor
FV
・It interrupts a circuit by signal current being applied from the signal terminal to heater resistor.
・It is also possible to protect a circuit against overcurrent and overheat.
・It is compliant with RoHS2 and Halogen free.
Application: Li-Ion battery pack (small energy storage, AGV, e-motor cycle,small EV and e-bike)
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Speaking instead of active antennas, these are available in different characteristics (GPS, GLONASS, BEIDOU, GALILEO) in which compared to the passive antenna, in addition to the antenna element, there is also an LNA amplification circuit and a power supply circuit. Thanks to this combination, the satellite signal is received, amplified and filtered from background noise, offering high gain, low noise factor and low power consumption.
Mounting to the target surface can be either adhesive or magnet.
Appearance:
| Specifications | |
|---|---|
| Frequency range | GPS: L1; 4G |
| DC voltage | 3.0-5.0V |
| Gain | 28 ± 3 |
| V.S.W.R. | 2.0:1 |
| Noise Figure | 1.5dB |
| DC Current | 11mA a 3.3V |
| Impedence | 50 ohm |
| RF cable lengthen | L=3m/5m or others |
| RF connector | SMA/FAKRA/GT5 or others |
| Mounting | Magnetic/adhesive mounting |
| Center frequency (MHz) | Working voltage (V) | Amplifier Gain (dB) | Size (mm) |
|---|---|---|---|
| BD:B1B2B3, GPS:L1L2L5, GLONASS:G1G2 | 3.0-16.0 | 38±3 | Φ148x60 |
| BD:B1, GPS:L1, GLONASS:G1 | 3.0-5.0 | 38±3 | Φ110x105 |
| BD:B1, GPS:L1, | 3.0-5.0 | 38±3 | Φ96x126 |
| BD:B1, GPS:L1, | 3.0-5.0 | 28±3 | Φ80x103 |
| BD:B1, GPS:L1, GLONASS:G1 | 3.0-5.0 | 28±3 | 55.4x43.9x16.7 |
| GPS:L1, MIMO 4G | 3.0-5.0 | 28±3 | 124x52.5x24 |
| BD:B1, GPS:L1, GLONASS:G1 | 3.0-16 | 28±3 | φ25x51 |
| GPS:G4 | 3.0-5.0 | 28±3 | 79x29x11 |
| GPS:3G | 3.0-5.0 | 28±3 | φ52x15 |
| GPS/GLONASS: 3G | 3.0-5.0 | 28±3 | φ75x14.2 |
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