Powersolve GMB Series - Manual (Page 6)

Powersolve Electronics Ltd. 8A Arnhem Road, Newbury, RG14 5RU. England
Tel: 01635 521858 Fax: 01635 523771 Email: [email protected]
Lithium Polymer
Rechargeable Batteries
High & Low Temperature Tests
Test Test Conditions and Method Results
High Temperature
A charged battery is placed in an oven for 2 hours at 55ºC±2ºC,
then discharged at a 0.5C current to the termination voltage Discharge 90% of the original Capacity
Low Temperature
A charged battery is placed in a thermal chamber for 2 hours at
-10ºC±2ºC, then discharged a 0.1C to the termination voltage
Discharge more than 85% of the
original capacity
Charge Maintenance
Test Test Conditions and Method Results
Charge Maintanence A charged battery sits for 28 days at an ambient temperature of
25ºC±1C, then discharged at 0.2C current to termination voltage
Discharge >85% of the original Capacity
Handling Precaution & Guidelines
Charging Current The charging current must be less than the maximum charge current specified in the electrical
specification
Charging Voltage The charging voltage must be less than the maximum nominal voltage 4.2V and the charging
voltage upper limit is 4.3V per single cell
Charging Temperature The cell must be charged within the range specified in the electrical specification
Reverse Polarity Since charging is done with a constant current or a constant voltage, reverse charging is prohibited. If
the cell is connected in reverse polarity it cannot be charged. Reverse polarity can damage the cell and
lead to degradation of cell performance, impair cell safety and cause heat generation or leakage
Discharging Current The cell shall be discharged at less than the maximum discharge current specified in the electrical
specification. A high discharge current may reduce discharge capacity significantly and cause
overheating
Discharge Temperature The operating temperature when discharging the battery should always be within the range specified in
the electrical specification
Over Discharge Over discharging will cause cell degradation and functional losses. The cell can degrade into an over
discharge state through self discharging. In order to prevent this the cell should be charged periodically
to retain between 3.6V and 3.9V
Protective Circuit Module
(PCM)
Cells should be used with a PCM that can protect against over charging, over discharging and over
current
Long Term Storage
If cells are to be stored for 3 months or longer they should be held in a dry cool environment. Voltage
during storage needs to be maintained between 3.6 and 3.9V. If stored for long periods keep in a half
charged state
Handling of Cells • Don’t charge the cells and keep them in a charged state for long periods
• Avoid any short circuit, it will cause the leads to get hot and lose electronic functions
• Packaging is easily damaged by sharp objects. Avoid touching with sharp objects during handling
• Next to leads is sealed edge, Don’t bend or fold sealed edges it is sensitive to movement
• Don’t open the folded edge on the side of the cells
• Don’t bend the tabs as these are sensitive and could be damaged
• Avoid mechanical shock to the cells
• Do not place cells in an oven, washing machine or high voltage container
• Use only recommended charger
• You should immediately stop charging if cell overheats, emits odour, changes shape or colour etc.
• Adults should supervise the use of batteries by children
• Before using batteries carefully read and understand handling guidelines.
• Avoid electro static discharge when using, charging and storing cells.
• Avoid accidentally putting battery in contact with metal conductors, which may cause a short.
• Don’t short circuit battery output terminals during assembly
• Never incinerate or dispose of the cells in a fire
6
For any further details or information please do not hesitate to contact our sales office
either by phone or email where we are able to offer our expert technical advise