3.7V 3.8Ah Intelligent Battery Design Solution of Tablet

Foreword: (keyword: lithium polymer battery) tablet helps the innovation of computer technology in the world. Because of its light weight, small thickness and multiple functions, the computer has more severe requirement of backup power supply. Compared with pillar lithium ion battery, lithium polymer battery has high utility rate of space, random size, ultra-thin thickness, good security, nice reliability, etc. and become the first choice of consumer electronics.

Intelligent battery design requirements of tablet:

Based on customer’s requirements and specifications, design intelligent battery pack of tablet to equip with host machine, integrate intelligent voltmeter with communication protocol (SBS communication protocol) and security of battery into the customer’s solution so as to share information between battery pack and host machine and realize reasonable, efficient and safe battery management scheme. The design scheme requires the battery has functions of ultra-thin thickness, high capacity, long cycle life, good security and nice consistency.

Intelligent battery design parameters of tablet:

Battery model: adopt advanced brand lithium polymer battery (PL5159115-2S1P/3.8Ah/3 .7V)

Appearance requirements: adopt PET synthetic paper for package, which is exquisite.

Electric circuit design: accurate capacity management circuit + secondary overvoltage protective circuit; adopt SBS intelligent battery management system design scheme, which can control the remaining capacity efficiently.

Intelligent battery scheme of tablet:

Connector terminal of 9PIN output: MIN connector terminal meets the current requirement of customer. Output definition are 3/P+、NTC、SMBC、SMBD、3/P, etc.

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Guard plate of intelligent voltmeter (PCM): adopt SBS intelligent battery management system, make use of advanced voltmeter calculating principle for battery capacity, report capacity information to host machine by SMBUS, and have protective function for rechargeable intelligent battery pack (tend to be lithium ion battery). Because of the chemical characteristics of lithium ion battery, it needs protective functions of overcharging, over-discharging, short circuit, overcurrent, over temperature, etc. so as to avoid combustion, explosion, etc.

Temperature protection (one-time): the temperature protection of secondary overvoltage in electric circuit mainly tests battery voltage. When the voltage of single battery is over 4.45V, peripheral circuit turns on temperature protective device to break the circuit and prevent overvoltage.

Overcurrent protection plate (BREAKER restorable): have functions of over current and temperature detection. When the current is 12A or temperature up to 75℃, the overcurrent protection plate is on. When the temperature is down, the overcurrent protection plate is back for normal operation.

PL5159115/3.8Ah/7.4V lithium polymer battery (ATL): large capacity, ultrathin, good security, nice consistency

Schematic diagram of the design:

Product pictures of intelligent battery for tablet: