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L05G TUBE
  • Product Name: Custom Li-ion Battery Packs
  • Subtitle:
  • As a premier Li-ion battery pack manufacturer / assembler, E&J recognizes Lithium Ion battery packs as the preferred power solution for today’s portable equipment. The cell in a Li-ion battery pack provides a higher energy density per unit volume and unit weight than Ni- based batteries. In addition, their higher voltage and lighter weight contribute significantly to the downsizing, weight reduction, and simplified operation of electronic devices.

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OUR ADVANTAGES

(1) Utilization of top quality cells
(2) Custom designed, molded plastic enclosures
(3) Standard pack design or SMBus solutions
(4) High volume or low quantity production capabilities

(5) Testing and cycling services



CUSTOM LI-ION BATTERY PACKS

Lithium ion (Li-ion) battery packs are an advanced chemistry that provides increased performance over nickel or lead based chemistries at a price premium. Li-ion and lithium polymer batteries can have as much as twice the energy density of NiCd (nickel cadmium), have relatively low self-discharge rates, and are capable of high discharge currents.


The lithium ion chemistry is available in several variations. Lithium cobalt oxide provides the greatest energy density; lithium manganese offers greater safety with lower energy density than lithium cobalt oxide; lithium iron phosphate provides high discharge rate capabilities, as well as long cycle and calendar life. Mixed cathodes can be used to optimize lithium rechargeable cells’ specific performance characteristics.


Cell voltage: 3.7V (nominal)
Capacity: 500mAh to 5000mAh
Energy by volume: 270 Wh/L to 324 Wh/L
Energy by weight: 105 Wh/kg to 130 Wh/kg
Cycle life: 300 – 1000 cycles
Self discharge rate: approx. 10% per month
Operating temperature range: -20°C to 60°C
Preferred charge method: constant voltage/constant current
Size: variable



APPLICATION

1) Telecommunications: cellular phone, interphone, cordless phone

2) Portable equipment: digital camera, portable DVD, portable television
3) Portable Devices: GPS, PDA, PMP, PSP, portable medical device, insrument and apparatus etc
4) Illuminate Devices: miner lamp, searchlight, lighting devies, emergency light
5) Others: toys, rc models, power





 See some of E&J Li-ion battery packs:















 

 

Battery Chemistries to Consider:

 

Lithium Ion (Li-Ion) & Lithium Polymer: May have twice the energy density of NiCd, can be capable of high discharge currents, and relatively low self-discharge. Often used for medical, military, industrial, consumer electronics.

Lithium Iron Phosphate (LiFePO4): superior thermal and chemical stability, c an handle higher temperatures without significant damage, higher rate discharge, longer cycle life, but lower voltage and energy density than other Li-ion chemistries. Often used for electronic vehicles, power tools, medical and military applications.

Nickel Cadmium (NiCd): fast charge, can take a charge at lower temperature, capable of thousands of cycles, competitively priced, limited size since they have been banned in some regions due to environmental concerns. Often used in medical and industrial equipment, test and measurement instruments, and other applications.

Nickel Metal Hydride (NiMH): No recycling issues, more capacity and less memory effect than NiCd, competitively priced, but can lose charge faster than NiCd. They are often used for small, lightweight, portable, and handheld battery packs.

Sealed Lead Acid (SLA):  Low initial cost, easy maintenance, low energy density, good charge retention, predictable discharge. Often used for medical devices, uninterruptable power supplies, and emergency lighting.

Lithium Primary: Non–Rechargeable: Highest energy unit per weight, mostly limited for low drain applications, can operate in a wide temperature range. Often used for photographic and electronic applications, security transmitters, smoke alarms, communications equipment, utility meters, scientific instruments, and other applications.

Alkaline: Non–Rechargeable: Better performance at low temperatures than Carbon Zinc/Zinc Chloride, low cost, longer shelf life and leakage resistance than carbon zinc. Often used for toys, flashlights and radios.

Carbon Zinc/Zinc Chloride: Non–Rechargeable: Low cost, limited shelf life, susceptible to leakage. Often used in radios, toys, and flashlights.

Silver Oxide: Non–Rechargeable: Small size, stable discharge voltage, good shelf life, able to operate over a wide temperature range. Often used for calculators and watches.

Zinc-Air: Non–Rechargeable: Small size, large capacity, quick start-up, stable voltage, light weight. Often used for pagers, hearing aids, and other small medical equipment.