Battery package power monitoring circuit design.lithium marine batteries Processing

　　This is a frame diagram of the traditional battery packaging electricity monitoring circuit design for single -section battery portable applications. The power monitoring is located on the side of the battery pack. The battery work is continuously monitored and the remaining capacity or operating time information is provided to the host through the I2C or single -line protocol. However, when the battery cycle is terminated, we have to throw away the battery bag even if the power monitoring score is still in a good state. We were forced to buy another battery pack with a power monitoring meter, which increased the cost of the end user. Can we put the power monitoring on the host side to reduce the cost as much as possible?

　　Traditional battery packaging power monitoring technology is such a framework structure. The chip of power monitoring is generally placed in the battery pack. The parts surrounded by the dotted line in this picture are the battery pack. The battery cell, that is, a battery electrical symbol seen here, and the power monitoring meter represented by the red square. This is where the TI device is located. There is also a protector that controls the MOS tube. This protector is to switch MOS to protect the battery core when the battery is overcharged or placed. Generally, a thermistor will be placed in the battery package to monitor the battery pack. Temperature, then except that the left is the system board of the mobile phone or tablet. On this system board, the power management chip and the host processor are mainly related to the electricity meter. HDQ bus to read the electricity information in the electricity consumption meter.

　　When this power information is learned, it is time to decide how much time to go to the battery is complete. When some users need to do some things, they can prompt whether the user is sufficient now. This is a traditional solution, which means that it means The solutions placed in the battery pack in the battery pack. The main devices of TI in this regard are the two main chips of BQ27541 and BQ27545; we have also launched BQ27441, which is a relatively low -cost solution; we also have BQ27741, this, this, this, this, this, this, this, this, this, this, this, this, this, this, this, this, has BQ27741. A solution that makes the electricity meter and the protector together; we also have BQ28Z560, which is also a solution made by the charter meter and the protector.

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