Standard Guide | North American Mobile Power standard ANSI/CAN/UL 2056
On October 22, 2024, ANSI/CAN/UL 2056 Standard for Safety Power Banks was officially released. Compared with the 2020 Outline of Investigation for Safety of Lithium-ion Power Banks, there are some changes in the scope of application, term definition, test requirements and methods, as follows:Scope of application
- Change Application: Change from a mobile power supply applicable only to lithium-ion battery types to a mobile power supply applicable to all battery types.
- Increase the voltage range: the maximum rated voltage of the input and output is increased from 20Vdc to 60Vdc, and the watt-hour rating of the mobile power supply is required to not exceed 100Wh.
- New: Also applicable to integrated photovoltaic cell as a power supply products.
Test requirement
The revision has made major changes to the test items, methods and requirements, among which part of the original test items have been revised, and the power limit, vibration and mechanical shock tests have been deleted, and the following test items have been added.
New test items:
- Electrical test: 55℃ output port short circuit test, abnormal charge test, forced discharge test, BMS verification, power input test and photovoltaic cell flammability test;
- Shell test: steady state uniform force test, bending force test, die stress relief test
- Miscellaneous tests: Label performance tests
Some revised test items:
Short-circuit test
- Added 55℃ test condition; The requirement for short circuit 24h was removed.
- For mobile power supplies containing lithium batteries, additional conditions are added: the initial discharge current of the built-in battery is 1.2 times the maximum continuous discharge current of the built-in battery. There is no need to apply a single fault condition to BMS with built-in batteries. The discharge will continue until the cell or battery explodes, exhausts, or BMS runs, and the internal cell housing temperature reaches steady-state conditions or returns to ambient temperature.
- For mobile power supplies containing lithium cells, the charging voltage is modified from 1.4 times the upper voltage of a single cell to 1.1 times.
MCM summary
Due to the growing demand for mobile power supplies, more and more mobile power supplies of uneven quality have emerged, which has led to more fire and burn incidents. The previous outline of the 2020 version has been unable to meet the current high requirements for the safety of mobile power supplies, and further revision standards are needed. Therefore, the official release of the standard is based on the original outline, and combined with the current United States and Canada on the necessary safety and quality management requirements for mobile power.
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