Using Solenoids to Enhance HEV Safety
Customer Problem
HEVs (hybrid electric vehicles) have lithium-ion batteries with voltages as high as 300 to 400 V. When an HEV is involved in an accident, the high-voltage wiring can suffer damage, possibly conducting that voltage through the vehicle’s body. This exposes both passengers and emergency personnel to the risk of electrocution. To mitigate this risk, an OEM needed a solution that would automatically disconnect the lithium-ion battery in the event of a crash.
The TLX Solution
TLX Technologies designed a residual magnetism latching solenoid to actuate the battery-disconnect mechanism. The solenoid’s rest position was de-latched. During an accident, a short voltage pulse energized the solenoid, and the resulting magnetic field drew the plunger to the latched position, disconnecting the battery. The solenoid’s core retained the magnetic field induced by the current pulse and held the armature in the latched position.
Residual Magnetism Latching Solenoid
- Stroke
- 2.5 mm
- Latching force
- 40 N
- Response time
- < 10 ms
- Release current
- 1 A
- Release response time
- 3 ms
- Release voltage
- 12 Vdc
- Durability
- > 500K cycles
All TLX components are customized to fit system requirements, meaning technical specifications are unique to each customer and design. Examples given on our website are for illustration purposes only.
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