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Lithium battery protection board mechanism

by:dcfpower     2020-11-29

lithium batteries ( Rechargeable type) Is necessary protective measures, is determined by its use value characteristics. Mainly because lithium batteries used to determine the value of material it can't be excessive charging, overcharge, over current, short circuit faults and charge and discharge of high temperature and high pressure, so the lithium battery lithium electricity parts will always be accompanied by a delicate protection board and a whole piece of current fuse. protection function in general by protection circuit board and PTC collaboration, protective plate is composed of electronic circuits, in - 40 ℃ to + eighty-five ℃ under the environment of every moment of the accurate monitoring of batteries voltage and charge control circuit of current, timeliness of on-off control current control circuit; PTC in sustained high temperature environment relatively severe destruction of batteries can be avoided. Ok then we see see study the lithium battery protection board function and principle.

what is lithium battery protection board

lithium battery protection circuit, lithium battery lithium battery protection board ( Rechargeable type) Is necessary protective measures, is determined by its use value characteristics. Mainly because of lithium battery protection board used to determine the value of material it can't be excessive charging, overcharge, over current, short circuit fault and the charge and discharge of high temperature and high pressure, so the lithium battery lithium battery protection board lithium electricity parts will always be accompanied by a delicate protection board and a whole piece of current fuse.

lithium battery protection function

lithium battery protection function in general by the current protection circuit board and PTC devices collaboration, protective plate is composed of electronic circuits, in - 40 ℃ to + eighty-five ℃ under the environment of every moment of the accurate monitoring of batteries voltage and charge control circuit of current, timeliness of on-off control current control circuit; PTC in sustained high temperature environment relatively severe destruction of batteries can be avoided.

ordinary lithium battery protection board generally including control IC, MOS switch, resistor, capacitor and auxiliary device FUSE, PTC, NTC, ID, memory, etc. In the control of IC, in determining the right under the condition of MOS switch control, make batteries with the external circuit conduction, and when the batteries voltage or current control loop over specified value, it immediately control MOS switch is closed, safeguard the safety of the batteries.

in the case of normal protection board, for high level Vdd and Vss, VM as low level, the DO, CO for high level, when the Vdd and Vss, VM any parameter transformation, the level will change on the DO or CO.

principle of lithium battery protection board

lithium battery ( Rechargeable type) Is necessary protective measures, is determined by its use value characteristics. Mainly because lithium batteries used to determine the value of material it can't be excessive charging, overcharge, over current, short circuit faults and charge and discharge of high temperature and high pressure, so the lithium battery lithium electricity parts will always be accompanied by a delicate protection board and a whole piece of current fuse.

lithium battery protection function in general by the current protection circuit board and PTC devices collaboration, protective plate is composed of electronic circuits, in - 40 ℃ to + eighty-five ℃ under the environment of every moment of the accurate monitoring of batteries voltage and charge control circuit of current, timeliness of on-off control current control circuit; PTC in sustained high temperature environment relatively severe destruction of batteries can be avoided.

ordinary lithium battery pack protection board generally including control IC, MOS switch, resistor, capacitor and auxiliary device FUSE, PTC, NTC, ID, memory, etc. In the control of IC, in determining the right under the condition of MOS switch control, make batteries with the external circuit conduction, and when the batteries voltage or current control loop over specified value, it immediately control MOS switch is closed, safeguard the safety of the batteries.

lithium battery pack protection board role

1. For lithium battery charging protection

lithium battery protection board in the charging process, if out of control, lithium battery protection board charger circuit can make the battery voltage is more than 4. After 2 v constant current charging again, at this moment the battery voltage will rise again, when the battery voltage charged to more than 4. 3 v, the battery's chemical side effects will be rising, will cause the battery damage or security problems.

2。 Over discharge protection

the battery in the process of external load discharge, the voltage will step down as the discharge process, when the lithium battery protection board battery voltage drop to 2. 5 v, flashing its capacity has been completely, at this moment, if allow the battery to discharge the load again will cause permanent damage to batteries. In the process of battery discharge, when the control IC detected the battery voltage is lower than 2. 3V( The value is determined by control IC, different IC have different values) When the & other; DO” Feet turn from high voltage zero voltage, make the T2 by conduction to shut down, then cut off the discharge control circuit, the li-ion battery protective plate battery can no longer to discharge the load, over discharge protection measures. But at the moment is mainly due to the existence of T2 own body diode VD2, the charger can also according to the diode for rechargeable batteries.


The , essentially perfected by custom battery pack manufacturers, is one of the first home appliance to be widely distributed.
During Shenzhen Chuangneng Ruiyuan Electronics CO.,LTD.’s existence in a market we didn’t receive any negative feedback from our customers.
A quality monitoring group created for ensuring that Shenzhen Chuangneng Ruiyuan Electronics CO.,LTD. manufactures custom lithium ion battery accoording the strictest standard.
While manufacturing custom lithium ion battery, we always pay attention to the technology and quality of the product.
Equipping custom lithium ion battery with innovative technology and updated processes will simplify daily compliance duties so that they can focus on attracting, retaining, and developing the most engaged workforce possible.

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