battery charger UEC formula
On June 13, 2016, DOE released the final version of the Federal Energy Conservation Code for Battery Chargers (BC) and required it to be enforced on June 13, 2018. At that time, all battery charger products (BC) sold in the United States will be required to comply with DOE regulations and be registered on the DOE Certification Management System (CCMS) system. The regulation applies to all products covered, whether DC or AC (115V at 60Hz) battery chargers manufactured in the United States or imported into the United States market.
According to the definition of the United States Federal Regulation (CFR), the Battery charger refers to a product that can charge the batteries of consumer products, including a battery charger built into consumer products.
According to this definition, the scope basically covers all consumer electronics products that can charge two batteries.
Mobile phone
Flat
Wireless headset
Wireless sound box
IT class products
AV class products
According to the capacity and voltage of rechargeable batteries, DOE energy efficiency regulations classify battery chargers into seven different categories, and formulate the corresponding battery charger unit energy consumption limits, that is, the annual energy consumption of battery chargers. The unit energy consumption of a battery charger is a function of the battery energy (Ebatt), which reflects the useless energy consumed by the battery charger in all operating modes (that is, the energy consumed during charging but not transmitted to the battery).
According to DOE test regulation 10 CFR 430, Subpart B and Appendix Y, the 24-hour energy consumption of battery charger, standby mode, maintenance mode and closing mode of battery charger and battery discharge energy Ebatt were measured respectively. Then the unit energy consumption UEC of battery charger was calculated according to corresponding formula. The unit energy consumption UEC can not exceed the corresponding limit.
UEC formula
(I) UEC = 365 (n (E24 - 5Pm - Ebatt) 24/tcd + (Pm (ta&m - (TCD - 5) n)) + (+) (+)
(II) UEC = 365 (n (E24 - 5Pm - Ebatt) 24/ (TCD - 5) + (Psbtsb) + (Pofftoff))
Among them: E24 = 24 hours of energy consumption, Ebatt = measured battery energy, Pm = maintenance mode power, Psb = standby mode power, Poff = off mode power, TCD = charge test duration; ta&m, n, TSB and toff are constants used according to the product category of the device.
The UEC is calculated by formula (i) or (i i) according to the charge test time (minus 5 hours) of the battery charger and the standard corresponding charge time threshold.
Battery charger classification and corresponding UEC requirements
MORLAB Energy Efficiency Laboratory has been approved by DOE of the US Department of Energy and CEC of California Energy Commission. It can test and register the energy efficiency of battery charger products, issue test reports and complete online registration. It can provide you with efficient and reliable energy efficiency testing certification services of DOE and CEC, and assist the general public. Customer products enter the US market smoothly and quickly.