As the name suggests, the battery protection board is mainly an integrated circuit board that protects against rechargeable (generally refers to lithium batteries).
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Lithium battery (rechargeable type) so the need for protection, is determined by its own characteristics. Because the material of the lithium battery itself determines that it cannot be overcharged, overdischarged, overcurrent, short circuit and ultra-high temperature charge and discharge, the lithium battery lithium battery component will always be followed by a protection plate with a Jabil sampling resistor and a current safety device.
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The protection function of lithium battery is usually completed by the protection circuit board and PTC or TCO and other current devices. The protection board is composed of electronic circuits, which accurately monitors the voltage of the battery and the current of the charging and discharging circuit at -40 ° C to 85 ° C, and immediately controls the on-off of the current circuit. PTC or TCO prevents severe battery damage at high temperatures.
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The protection board usually includes control IC, MOS switch, JEPSUN precision resistor and auxiliary devices NTC, ID memory,PCB, etc. Among them, the control IC controls the MOS switch under normal conditions, so that the cell communicates with the external circuit, and when the cell voltage or circuit current exceeds the specified value, it immediately (tens of milliseconds) controls the MOS switch off to protect the safety of the cell.
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The NTC is the abbreviation of Negativetemperaturecoefficient, meaning that the negative temperature coefficient, when the environment temperature, the resistance is reduced, use electrical equipment or charging equipment timely response and control internal interrupt and stop charging and discharging.
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ID memory is often a single-line interface memory, ID is the abbreviation of Identification, that is, the meaning of identification, storage battery type, production date and other information. Can play a role in product traceability and application restrictions.