Polymer li-ion battery User’s Guide

1   General Handling and Precautions

A.  In case of contacting the materials from a damaged or ruptured cell or battery:

 Eye contact: Washing immediately with plenty of water and soap for at least 15 minutes.  Or 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.

B.  Keep away batteries from children.

C.  The cells/ batteries are requested to be stored within a proper temperature range specified in the respective specifications.

D.  Do not store batteries in a manner that allows terminals to short circuit.

E.  Do not place batteries near heating sources, nor exposed to direct sunlight for long periods. Elevated temperatures can result in reduced battery service life.

F.  Charging Battery

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 “CC/CV” or constant current /constant voltage method.

Do not charge the battery with a current or voltage higher than the specified maximum value in the respective specifications. The absolute maximum charging voltage is 4.25V per cell.

Prohibit reverse charging of the battery. The battery must be connected correctly. 

G.  Discharging Battery

Discharge battery at the max current specified in the respective specification. If you plan to discharge battery at a higher current than the max current, please consult Sunshine U.

Normally, avoid discharge the battery below 2.75V for each cell.

Do not over-discharge the battery. Over-discharging can damage the performance of the battery.

H.  Operation Temperature

The battery shall be operated (stored, charged and discharged) in the temperature specified in the respective specifications.

I.  Cell/Battery Protection Circuit Module (PCM)

If the voltage of each cell exceeds 4.5 volts during charging, gas will generate due to the decomposition of electrolyte. It may cause pressure inside go up or cause leakage. If the voltage of the cell drops below 1.0 volt, the copper collector of the negative electrode will be dissolved into the electrolyte, which will deteriorate the performance of the cell. That is why the cell must be used as a battery pack with PCM to avoid overcharging, over-discharging and over-current.

J.  Battery Short Circuit

Do not short-circuit a battery. 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.

Prohibit reversing cell polarity within a battery assembly. 

K.  The cell edge of the heat seal zone is electrically conductive. Avoid the edge cross battery terminals, PCB, or conductive surfaces

L.  Do not bend, fold or fall the battery or part of the battery. It may cause the battery be damaged and result in the battery swelling, leaking, explosion or ignition

M.  Do not open or manipulate the folded cell edge.

N.  Do not bend or fold the sealing edge. And do not tear off the sealing film.

O.  Battery Pack Design

The battery housing should have sufficient mechanical strength.

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.

Avoid designing airtight battery housing.

P.  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 350°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

Q.  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.

R.  Do not use different types of batteries together. It might damage the batteries.

S.  Other Warnings

If the PCM fails to work, do not charge the cell in large current or with high voltage, otherwise it may lead to abnormal chemical reaction in the cell.

Please charge the cell with specified charger. Do not connect the cell with other electric power source. Excessive voltage may destroy the cell.

Do not store the cell over a month after it has been fully discharged. If you want to store the cell over a month, please charge the cell to 50~70% of its full capacity beforehand.

If the cell can’t be charged to its full capacity within specified charging time, please replace with a new one.

Aluminum tab is the Positive Tab while nickel tab is the Negative Tab. Please follow the direction on the cell.

Do not parallel or put the batteries into serial without prior technical consultations. For detailed information, please contact us.

Do not heat or dispose the battery into fire, water or other liquids.

Do not put the battery into microwave, washing machine or drying machine.

Do not put the battery onto oven.

Do not use a damaged battery.