The functions of PCM (protection circuit module) for lithium batteries
Published Date: 2017-09-13 09:14
Category: Product knowledge
Because of the chemical activity, structure and other reasons, lithium batteries need to have a protective system, if there is no protection system, lithium battery life will be greatl ed in every aspect, including product R&D, supplier management, material control, product process control, finished Shipping and after-sales service.
PCM of lithium battery usually includes control IC, MOS tube, resistor, capacitor and auxiliary 333px;">We adhere to the customer-oriented requirements, to provide customers with satisfactory products with pragmatic and rigorous attitude, to provide customers with products beyond the expectations with innovative technology and craftsmen spiri
components FUSE, PTC, NTC, ID, memory unit etc. Among them, control IC is the core of the protection chip, MOS tube in the protection board circuit play the role of switch. IC control the MOS tube switch in all normal circumstances, to ensure that the bat h| "`| T" T" 0'f| ( ( 'f| l" pl" Y" T" S" j" j" -steries and external circuit conduction, and when the battery voltage or loop current exceeds the specified value, it immediately control the MOS switch off, to protect the safety of lithium batteries.
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The function of PCM is to protect the rechargeable batteries, maintain the safety and stability of the battery charge and discerred to as the delay time and the lowe #`| ( ( Xe| j" j" Y" T" S" T" T" g| j" j" harge process, play an important role of the entire battery circuit system, the functions are as follows:
le life of lithium battery.
1. Over-charge protection
When charging the battery, the voltage reaches the maximum voltage of lithium batteries (4.2V), PCM will control the overcharge of the MOS tube into the off state, stop charging, thus preventing the battery overcharge.
2. Ove>
Researchers use their researched folded battery to charge the smart phone, the results show that this battery can be built into the elastic strap, and the bendable, extensible shape do not affect battery perforh charr-discharge protection
When the battery is end of discharge coming sootch and bend any state that you need, unlike the hand-folded technique, rotation at the cutting allows the battery to stretch and fold without affecting its thickness.
n, the voltage reaches the minimum value (usually 3V, there are some differences in different manufacturers), the PCM will control the over-discharge of the MOS tube into the off state, to prohibit its discharge, so as to prevent its over-discharge.
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In fact, as an emerging industry, graphene industry should avoid other industries through the detours, such as at the beginning of the industrial development, creating a favorable environment of industrial development, avoid the false propaganda, myth, publicity, and public opinion, in the face to the manufacturers the battery's own protection circuit to operate over a long period of time.
3. Do not wait the power runs out and then charge for it
3. Over-current protection
Over-current protection function is in the consumption of high current to stop the discharge of the load, the purpose of this function is to protect the battery and MOS tube to ensure that the battery in the working state of the security. After over-current detection, the battery will return to normal after disengaging from the load, and can be recharged or discharged.
4. Short-circuit protection.
When the lithium battery accidentally short circuit, the PCM will automatically shut down in a few milliseconds, will not electrify, then the positive and negative encounter is also nothing, the formation of a short circuit protection will not cause the explosion occurred.
