User's Manual
Table Of Contents
- Foreword
- Important Safety Information
- Contents
- About this Document
- Related Publications
- Product Description
- Features
- Specifications
- Air Interface
- Product Functionality
- Contents
- Integration Goal and Objectives
- Customer Problem Isolation
- Wireline and Wireless Communications
- Design Tips for Serviceability
- Environmental Issues
- Regulatory Requirements
- Contents
- Power Supply
- Host Interface
- Power Management
- Antenna Systems
- Hardware Recommendations
- Battery Selection Criteria
- Contents
- Hardware Integration
- Application Software
- Final Assembly
- Installation
- Troubleshooting
- End User Problem Resolution
- Service Depot Repair
- Contents
- Accessories and Options
- Abbreviations and Acronyms
- Desense Overview
- Desense Measurement Techniques
- Preparing the Device Under Test
- Performance Goals
- Methods of Controlling Emissions
- Antenna
- Summary
- FLEX Application Protocol Licensing
- Licensing
4-26 July 23, 2002
Hardware Integration CreataLink2 XT Hardware Integrator’s Guide
Battery Selection Criteria
• Exhibits the memory effect in a manner similar to NiCd technology, but at a
less pronounced level
• Internal impedance of 35–49 mΩ for each 1.2V cell
• Typical cell voltages are 1.2V, with multiple cells used to obtain higher
operating voltages.
• Earlier NiMH battery chemistry was damaged by high current discharge
pulses. This problem has been eliminated in recent battery chemistry. When
purchasing batteries of this type, determine if high current pulse discharging
is a concern.
• Typical charge method is dT/dt, where T is temperature. As the battery
reaches full charge, any further energy dissipates as heat. A temperature
threshold terminates the charge cycle in conjunction with voltage monitoring.
NiMH is more sensitive to overcharging that NiCD and exhibits decreased
capacity if repeatedly overcharged.
• Raw battery cells or battery packs can be purchased from suppliers.
• Typical operating temperature range is –10° C to +50° C.
Lithium-Ion
Li-ion characteristics are as follows:
• Less mature technology
• Higher energy density than either NiCd or NiMH
• Most suppliers do not sell cells, but force customers into particular solutions
through their battery pack designs. Due to cell lead times, purchasing cells to
design a battery pack could be a problem.
• Li-ion does not exhibit the memory effect and is not affected by partial dis-
charging charging cycles.
• Internal impedance of 100–150 mΩ for each 3.6V cell. Li-ion batteries are sus-
ceptible to damage due to over-discharge and high current pulses.
Manufacturers recommend adding a protection circuit to battery pack designs.
The resultant internal impedance of a battery pack with protection circuitry
can reach the 500 mΩ level.
• Typical cell voltages are 3.6V with multiple cells used to obtain higher
operating voltages.
• Li-ion batteries are very sensitive to over discharge and represent a hazard if
not properly designed with protection circuitry.
• Typical charge method is constant voltage, constant current.
• Typical operating temperature range is –10° C to +50° C
Lead-Acid
Lead-Acid characteristics are as follows:
• Very mature technology
• Low energy density
• Standard cells are available, but not in flashlight sizes
• No memory effect
• Internal impedance of 10-20 mΩ per 2V cell
• Typical cell voltages are 2.0 Vdc with multiple cells used to obtain higher
operating voltages.
• Typical charge method is to use a C/100 current source continuously on.
• Raw battery cells or packs are available.
• Typical operating temperature range is –30° C to +60° C.