EC62133 Certification of Li Polymer Battery
What’s the IEC62133 Certification?
IEC 62133-2:2017 is the most well-known standard for exporting lithium-ion batteries, including those used in IT Equipment, GPS, wearable products, smartwatch, Bluetooth devices, wireless sensors, tools, laboratory, household, and medical equipment.
In February 2017, the International Electrotechnical Commission (IEC) officially released the IEC 62133-2:2017, an international safety standard for lithium-ion battery products. This standard is mainly for the safety requirements of a single battery and battery packs and portable sealed only sell batteries and battery packs containing alkaline or non-acid electrolytes (including lithium-ion polymer batteries, lithium-ion(Li-Ion) cells, nickel-hydrogen batteries, nickel-cadmium batteries, etc.). The second edition will have some significant changes related to Lithium-ion Batteries.
T.1 Charging procedures for test purpose
T.2 Continuous charging at constant voltage (lithium-ion cells)
T.3 Molded case stress at a high ambient
T.4 temperature (lithium-ion battery)
T.5 External short circuit (lithium-ion cell)
T.6 External short circuit (lithium-ion battery)
T.7 Lithium-ion Battery Freefall
T.8 Thermal abuse (lithium-ion cell)
T.9 Crush (lithium-ion cells)
T.10 Over-charging of lithium-ion battery
T.11 Forced discharge (lithium-ion cells)
T.12 Transport Tests.
– Lithium-ion Polymer Cell
3.7V 1000mAh 3.7Wh
+ Date: 201705.
Lithium-ion Battery submitted by LiPol Battery Co., Ltd. are tested according to IEC 62133-2:2017 Secondary cells and batteries containing alkaline or other non-acid electrolytes Safety requirements for portable sealed seconds cells. and for lithium-ion batteries made from them, for use in portable applications.
5. General safety considerations
Lithium-ion cells and lithium-ion batteries subject to intended use be safe and continue to function in all respects. Cells and batteries subject to reasonably foreseeable misuse do not present significant hazards.
5.2 Insulation & Wiring
Insulation Resistance between an accessible metal case (excluding electrical contacts) and positive terminals > 5MO. Internal wiring and insulation are sufficient to withstand maximum anticipated current, voltage and temperature requirements. The orientation of wiring maintains adequate creepage and clearance distances between conductors. The mechanical integrity of internal connections is sufficient to accommodate conditions of reasonably foreseeable misuse.
Lithium-ion battery cases and lithium-ion cells incorporate a pressure relief mechanism or are constructed so that they relieve excessive internal pressure at a value and rate that will preclude rupture, explosion, and self-ignition. The venting mechanism exists on a narrow side of the pouch cell. Encapsulation used to support lithium-ion cells within an outer casing does not cause the battery to overheat during normal operation no inhibit pressure relief.
5.4 Temperature /Voltage /Current Management
The lithium-ion batteries are designed such that abnormal temperature rise conditions are prevented. Over-discharge, over current and short-circuit proof circuit used in this lithium-ion battery. Means are provided to limit current to safe levels during charge and discharge. The lithium-ion batteries are designed such that within the temperature, voltage and current limits specified by the cell manufacturer. Lithium-ion batteries are provided with specifications and charging instructions for equipment manufacturers so that associated chargers are designed to maintain charging within the temperature, voltage and current limits specified.
5.5 Terminal Contacts
Terminals have a clear polarity marking on the external surface of the lithium-ion battery. The size and shape of the terminal contacts ensure that they can carry the maximum anticipated current. External terminal contact surfaces are formed from conductive materials with good mechanical strength and corrosion resistance. Terminal contacts are arranged to minimize the risk of short circuits.
5.6 Assembly of Lithium-Ion Cells into Lithium-ion Batteries
5.61 If there is more than one lithium-ion battery housed in a single battery case, lithium-ion cells used in the assembly of each battery have closely matched capacities, be of the same design, be of the same chemistry and be from the same manufacturer. Each lithium-ion battery shall have independent control and protection. Manufacturers of lithium-ion cells make recommendations about current, voltage and temperature limits so that the lithium-ion battery manufacturer/designer may ensure proper design and assembly. Lithium-ion batteries that are designed for the selective discharge of a portion of their series-connected lithium-ion cells incorporate separate circuitry to prevent the cell reversal caused by uneven discharges. Protective circuit components are added as appropriate and consideration was given to the end-device application. When testing a lithium-ion battery, the manufacturer of the lithium-ion battery provides a test report confirming the compliance according to this standard. The battery incorporates separate circuitry to prevent lithium-ion cell reversal from uneven charges as the pack is designed for the selective discharge of a portion of its series-connected cells.
5.6.2 Design Recommendation for Lithium System Only
For the lithium-ion battery consisting of a single cell or a single cell block:
charging voltage of the lithium-ion cell does not exceed the upper limit of the charging voltage specified in Clause 8.1.2, Table 4 or Charging voltage of the lithium-ion cell does not exceed the different upper limit of the charging voltage determined through Clause 8.1.2, NOTE1.
5.7 Quality plan
The manufacturer has prepared a quality plan defining the procedures for the inspection of materials, components, lithium-ion cells, and lithium-ion batteries and which covers the process of producing each type of lithium-ion cell and a lithium-ion battery.
6. Type Test Conditions
Tests were conducted with the number of lithium-ion cells or lithium-ion batteries as outlined in Table 2 of IEC 62133 with lithium-ion cells or lithium-ion batteries that were not more than six months old. Unless noted otherwise in the test methods, thieving was conducted in an ambient of 20°C±5°C.
7. Specific requirements and tests(nickel systems)
Results: No physical distortion of the battery casing resulting in exposure if internal components.
The test was carried out using:
– four fully charged cells of the same brand, type, size and age-connected in series, with one of them reversed.
8. Specific Requirements & Tests
If a lithium-ion cell’s specified upper or lower charging temperature exceeds values for the upper or lower limit test temperatures of Table 4, the lithium-ion cells were charged at the specified values plus 5°C for the upper limit and minus 5°C for the lower limit. A valid rationale was provided to ensure the safety of the lithium-ion cell.
9. Information for safety
The manufacturer of secondary cells ensures that information is provided about current, voltage and temperature limits of their products.
The manufacturer of batteries ensures that equipment manufacturers and, in the case of direct sales, end-users are provided with information to minimize and mitigate hazards.
Systems analyses performed by device manufacturers to ensure that a particular battery design prevents hazards from occurring during the use of a product.
As appropriate, information relating to hazard avoidance resulting from a system analysis is provided to the end-user.
10.1 Cell marking
Cells marked as specified in the applicable cell
standards: IEC 61951-1, IEC 61951-2 or IEC 61960.
10.2 Battery marking
Batteries marked in accordance with the requirements for the cells from which they are assembled.
Batteries marked with an appropriate caution statement.
10.3 Other information
Disposal instructions are marked on the battery or supplied in the information packaged with the battery.
Recommended charging instructions are marked on the battery or supplied in the information packaged with the battery.
Cells or batteries were provided with packaging that was adequate to avoid mechanical damage during transport, handling and stacking. The materials and pack design were chosen to prevent the development of unintentional electrical conduction, corrosion of the terminal and ingress of moisture.