What is a lithium battery management chip?

Therefore, the battery management chip will detect the voltage and current of the battery to ensure that they are normal. The lithium battery management chip and switches are important components of battery application system. Reference [ 13, 14] is a typical application circuit of lithium battery management chip, as shown in Fig. 4.

Can a single lithium battery management chip be integrated?

In this study, the current sampling method and the highly integrated switch proposed are successfully integrated into a prototype single lithium battery management chip, which was designed by the authors and fabricated with 0.18 μm 5 V technology. Fig. 13 demonstrates the die microphotograph of the chip. The proposed switch occupies 0.2829 mm 2.

How much power does a lithium battery management chip consume?

The battery management chip consumes 0.838 μA of quiescent current, and its power down current is less than 10 nA. The two current detection circuits and bandgap circuits consume almost more than half of the power. This is the overhead of a single lithium battery management chip at a power supply of 3.6 V. Fig. 13. Chip microphotograph. Fig. 14.

What is a lithium battery string management chip?

A three lithium battery string management chip was fabricated with 180-nm 45 V Bipolar-CMOS-DMOS (BCD) technology, which also integrates the improved voltage transfer circuit. Figure 7 presents a microphotograph of this chip, which has a silicon area of 1.38 mm 2. The improved voltage transfer circuit itself occupies just 0.18165 mm 2.

What happens if a lithium battery management chip or switch fails?

If the lithium battery management chip or switch fails, it leads to battery safety problems. In the worst scenario, it may cause fire outbreaks and other disasters. Consequently, the robustness of the switch directly determines the security performance of the lithium battery management system.

How to reduce the size of lithium battery management system?

To decrease the size caused by the traditional battery management system and minimize the cost effectively, a new switch and current detection circuits were designed and integrated into the lithium battery management chip. Moreover, the measurements indicate that the proposed circuit is cost-effective and more competitive.