Resettable Fuse offers Smart Activation functionality.
March 12, 2012 -
Combining bimetal protector in parallel with polymeric positive temperature coefficient device, MHP-SA50-400-M5 provides overcharge protection in multi-cell lithium battery applications. Resettable Metal Hybrid PPTC device has 50 A/400 Vdc max rating and 50 A hold current on main line. With Smart Activation feature, device can be activated electronically with as little as 3 A via signal line. Applications include cordless power tools, light electric vehicles, and energy storage systems.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
TE Connectivity Ltd.
1050 Westlakes Dr.
Berwyn, PA, 19312
USA
TE Circuit Protection's MHP Technology Now Offers Smart Activation Feature
New MHP-SA device offers a more robust, space- and cost-saving approach for protecting high-power, multi-cell lithium battery applications
MENLO PARK, Calif. - TE Circuit Protection, a business unit of TE Connectivity, today announced a new Metal Hybrid PPTC (MHP) device offering Smart Activation (SA) functionality. The MHP-SA device provides a resettable, cost-effective and space-saving alternative to typical methods of protecting high-power lithium battery and module applications. These include cordless power tools, e-scooters and light electric vehicles (LEVs) and standby power and energy storage systems (ESSs).
The new MHP-SA device helps provide overcharge protection in large multi-cell battery packs and modules in which circuit protection devices interface with electronics as part of a sophisticated battery management system. The MHP-SA device's Smart Activation design feature accomplishes this via a third terminal signal line that enables external activation.
In a typical scenario, an IC monitors the battery system's temperature, current and voltage and, if an abnormality is detected, it switches on a FET and activates the heater element (PPTC) of the MHP-SA device to heat the bimetal. The bimetal contacts then open and cut contact to the main line. The first in a series of planned devices, the new MHP-SA50-400-M5 device has a 50A/400VDC maximum rating and its hold current is 50A on the main line. The device can be activated electronically with as little as 3A via the signal line.
MHP Technology utilizes a hybrid circuit protection approach, combining a bimetal protector in parallel with a polymeric positive temperature coefficient (PPTC) device. Resettable MHP technology offers excellent arc suppression characteristics and also offers a smaller size and thinner form factor compared to larger DC fuses or other protection devices.
The MHP-SA device helps save design costs due to its ability to employ a low-power switch to open the main line, enabling lower-cost FETs to be installed. And because the MHP-SA device is resettable there is no need to overrate for inrush currents. In some cases, designers can replace larger, higher-cost DC fuses with an MHP-SA device.
"Few protection solutions address high-rate-discharge battery applications, and traditional circuit protection techniques tend to be large, complex and/or expensive," said Ty Bowman, TE Circuit Protection Global Battery Market Manager. "The MHP-SA device offers design benefits in multi-cell battery packs that conventional circuit protection approaches are unable to deliver. The MHP-SA device provides a rugged, resettable overcharge protection solution that offers battery pack designers and manufacturers a way to optimize space, reduce cost, enhance safety and help meet future battery safety requirements."
For further information or technical assistance, call (800) 227-7040, or visit www.circuitprotection.com. To find a sales representative in your area, please go to: www.circuitprotection.com/contactus.asp.
Model: MHP-SA50-400-M5 (50A, 400VDC); additional ratings planned
Price: Available upon request
Availability: Samples available now
Delivery: 12 weeks ARO
ABOUT TE Connectivity
TE Connectivity is a global, $14 billion company that designs and manufactures nearly 500,000 products that connect and protect the flow of power and data inside the products that touch every aspect of our lives. Our nearly 100,000 employees partner with customers in virtually every industry-from consumer electronics, energy and healthcare, to automotive, aerospace and communication networks-enabling smarter, faster, better technologies to connect products to possibilities.
All trademarks are the property of their respective owners without referring to any trademarks specifically.
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User comments about this story
MHP-SA50-400-M5
Would this part work with an AC source given that the trip device can handle AC?
Thanks,
Mike
By Mike Hermel on Jun 4, 2012 17:42
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