Northern Light® Miners Cap Lamps
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EWS & Co. AS offers the complete line of NL Technologies®
charging systems as well as several custom made chargers to
suit every customer's needs. Chargers come in sizes from an
ultra-portable clip-style charger to a wall mounted rack of
40 cap lamp chargers.
Cap lamp batteries are available in 10 hour time and 12 hour time. Each duration needs its own specific charger, 10 hour batteries are charged with the S type (standard) charger 12 hour batteried are charged with the E type (extended) charger. The GIIIR radio cap lamp batteries have been specially modified to fit a Motorola radio and need their own specific charger, the RE type (Radio Extended). Shown below are the tags for each charger type.  Radio cap lamp chargers are available as stand alone units or they can be interspersed with other charger types in a rack type charger. Rack style chargers come in two sizes regular and narrow width. The regular size charging rack has space for up to 40 charging stations in panels of 10 each, while the narrow rack has space for up to 20 charging stations in panels of 5 each. Each style of rack charger can come with one to four panels depending on customer need at the time of purchase. Add-on panels can be ordered seperately up to the full capacity of the rack. Portable chargers are available in single, dual and 5-unit versions. Single unit chargers come in 3 styles. The clip charger (regular duration batteries only), the 12V (car adapter style) charger (regular duration batteries only) and the table-top single unit charger. |
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Northern Light® chargers use a 4-Stage advanced circuitry charging
system. Each charger works individually, any variation in charging time
is taken care of at the unit level, and any failure in either battery
pack or charging unit does not affect the system as a whole.
The Charging Circuitry is designed to give the battery an optimal charge. A 4-stage cycle guarantees that the battery is recharged to its maximum level by conforming to the battery's ability to take a charge. The 4 Stages are: STAGE 1: High Rate Charging A constant current is supplied to the battery pack until pack temperature rises. This rapid increase in temperature indicates the pack's reduced ability to accept charge. STAGE 2: Cool Down The curent is then shut off and the charger LED will come on. The battery is then allowed to cool down. STAGE 3: Top-Up After cooling, this stage employs a pulse width modulated charging until the pack temperature rises again. This charges the battery the last 5-10% which most other chargers neglect. STAGE 4: Trickle Charge After the Top-Up stage, the charger switches to Trickle mode. A small trickle current is supplied to keep it 100% charged. Note: the pack may remain indefinitely in the charger with no adverse effects on the pack. |
