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discharge lithium battery discharge board(CIRCUIT DESIGN) Self-protection circuit and the characteristics of lithium batteries as follows: Lithium-ion battery protection circuit includes over-charge protection, over current / short circuit protection and over-discharge protection, small size lithium batteries, high energy density, is the best power storage, but also has its shortcomings that require special attention. In recent years, more and more to carry goods, most use lithium batteries as main power. Li-ion battery with no memory effect, high cycle life, high-voltage battery and low self-discharge, etc., and nickel-cadmium, nickel metal hydride batteries are not the same, lithium batteries must consider the charge, discharge of security features to prevent deterioration. A process not pay attention to, lithium batteries will experience a qualitative change of the damage. Lithium-ion battery protection circuit is to ensure that the following conditions can be monitored: Overcharge protection Over-charging protection circuit principle: When an external charger for lithium batteries, in order to prevent the voltage input exceeds the rated capacity, resulting in changes in battery materials. Protection circuit needs to be cut off the action, to prevent the continued input voltage battery charger This voltage threshold value, need sophisticated battery specifications. Charging too long protection Charging too long to protect the principle is: When the characteristics of the battery can only charge to a certain voltage, if the constant sink current of the battery, a battery deterioration concerns, the need to consider charging the whole time, and sophisticated battery specifications. Over-discharge protection In the case of excessive discharge, caused by decomposition of the electrolyte cell characteristics due to deterioration, reduced number of charge cycles and cause. Battery discharge protection circuit to avoid using excessive discharge phenomenon, to achieve cell protection. In order to prevent excessive battery discharge status, assuming that the lithium battery connected to the load when the battery voltage is lower than the over-discharge voltage test point (assumed to be 2.3V) will start over-discharge protection, cut off the output power. When the lithium battery charger connected again, and this time the basis of voltage lithium battery voltage is present, the normal discharge to the battery charger. Over current and short circuit current For unknown reasons (positive and negative discharge or by metal objects inadvertently) caused by over-current or short circuit, to ensure safety, the protection circuit must immediately cease its discharge. |
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Dian-Deng/ACEUP
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service@dian-deng.comPROFESSIONAL DEVELOPMENT OF ELECTRONIC CIRCUITS LAYOUT DESIGN - PROFESSIONAL SOFTWARE FIRMWARE DEVELOPMENT - PROFESSIONAL SOFTWARE LOGICAL LAYOUT - PROFESSIONAL SINGLE CHIP / MCU / MICROPROCESSOR DEVELOPMENT - PROFESSIONAL PROOFING DESIGN - PROFESSIONAL-VOLUME PRODUCT DEVELOPMENT - PRODUCTION ADVICE AND ASSISTANCE TEST THE SYSTEM WITH THE PRODUCTION - LIFE APPLICATION ELECTRONIC - VOLTAGE / CURRENT / CHARGE / DISCHARGE INTEGRATION OF THE LAYOUT - DESIGN COSTS REASONABLE - CONSULTATION SEEKING LONG-TERM PARTNERS - TO REDUCE DEVELOPMENT COSTS