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Battery Charging
Temperature range for charge:0°C-+45°C.
Use only approved chargers and procedures. Improperly charging a cell or battery may cause the cell or battery to flame or damage.
Charge the battery using the “CCCV” or constant current /constant voltage method.
Do not charge the battery with a current or voltage higher than the specified maximum value in the specification.
Stop charging at once if batteries generate heat, become swelled or deformed, or appear abnormal in any way.
Prohibit reverse charging of the battery. The battery must be connected correctly.
Never charge primary/unrechargeable batteries.
Battery Discharging
Temperature range for discharge:-20°C-+55°C.
Discharge battery at the max current specified in the specification. If you plan to discharge battery at a higher current than the max current, please consult us.
Avoid discharge the battery below the cutoff voltage for each cell.
Do not over-discharge the battery. Over-discharge can damage the performance of the battery.
The discharge performance will be depressed a certain extent at low temperature.
It should be noted that the battery would be at an over-discharged state by its self-discharge characteristics in case the battery is not used for long time. In order to prevent over-discharge, the battery shall be charged periodically to maintain the voltage between 3.7V and 4.1V.
Battery Short Circuit
Do not short-circuit a battery. A short circuit can result in over-heating of the terminals and provide an ignition source. More than a momentary short circuit will generally reduce the cell or battery service life and can lead to ignition of surrounding materials or materials within the cell or battery if the seal integrity is damaged. Extended short-circuiting creates high temperature in the cell and at the terminals. Physical contact to high temperatures can cause skin burns. In addition, extended short circuit may cause the cell or battery to flame.
Battery Protection
The safety of lithium ion battery power supply equipment is the most concerned problem, so its protection is very important. The basic protections of lithium ion battery mainly include overcharge protection, over discharge protection, overcurrent and short circuit protection.
When the charger overcharges the lithium ion battery, it is necessary to terminate the charging state in order to prevent the rise of internal pressure caused by temperature rise. Therefore, the protection device needs to monitor the battery voltage. When it reaches the battery overcharge voltage, it will activate the overcharge protection function and stop charging. In order to prevent the over discharge state of lithium ion battery, when the voltage of lithium ion battery is lower than its over discharge voltage detection point, activate the over discharge protection, stop the discharge, and keep the battery in the standby mode of low quiescent current. When the discharge current of lithium ion battery is too large or short circuit occurs, the protection device will activate the overcurrent protection function. The temperature control of charge and discharge and the temperature control of charge and discharge process also need to be considered. Charging and discharging lithium ion batteries at high temperature may cause explosion. Charging and discharging at low temperature will cause damage to the cell.
Battery Storage
The batteries are requested to be stored within a proper temperature range specified in the specification. The best storage temp. is 25±5°C. The best humidity is 60±15%. They should be stored in a cool, dry and well-ventilated area and in a 50% charged state (3.85V). In order to avoid over-discharge, we suggest charge and discharge the batteries every three months, then store them in a 50% charged state (3.85V).
Do not store batteries in a manner that allows terminals to short circuit.
Do not place batteries near heating sources, nor exposed to direct sunlight for long periods.
Elevated temperatures can result in reduced battery service life.
Battery Transportation
The battery should be transported with 10%-60% charge.
The battery should be packed with insulation and shockproof material to avoid the damage from jolting and collision on the way.
The battery should be handled with care when loading and unloading during transport. Do not throw batteries and prevent from collision.
Do not transport batteries together with the flammable, explosive objects, or sharp metal goods.
Battery Pack Design
The battery housing should have sufficient mechanical strength to protect its internal cells from mechanical shock.
No sharp edge components shall be inside the battery housing. The sharp edge may destroy the cell packaging.
No cell movement is allowed in the battery housing.
The ultrasonic head shall not directly/or indirectly pressed the cell if you need to enclose the battery housing by ultrasonic method. Please consult us for designing the ultrasonic head. Avoid designing airtight battery housing.
The battery must be equipped with a protection circuit module(PCM) that protects the cell/battery from overcharging, over-discharging, over-current and short circuit.
Battery Assembly
We recommend ultrasonic welding or spot welding to connect battery with PCM or other parts. If you employ manual solder method to connect tab with PCM, please pay attention to the followings:
Use a solder with temperature controlled and ESD.
Soldering temperature should not exceed 300°C.
Soldering time should not be longer than 3s.
Soldering times should not exceed 5 times.
Keep battery tab cold down before next time soldering.
Do not directly heat cell body. It may cause the battery be damaged by heat above 90°C.
Battery Disassembly
Never disassemble a battery.
Should a battery unintentionally be crushed, thus releasing its contents, rubber gloves must be used to handle all battery components. Avoid inhalation of any vapors that may be emitted.
In case of contacting the materials from a damaged or ruptured cell or battery
Eye contact: Washing immediately with plenty of water and soap or for at least 15 minutes. Get medical attention.
Skin Contact: Washing immediately with water and soap.
Inhalation of Vented Gas: Remove to fresh air. Get medical attention.
Ingestion: Get medical attention immediately.
Keep away batteries from children.
