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Abstract In order to cut the costs and overcome the leakage current of batteries caused in traditional method, this study introduces an improved voltage transfer method for lithium battery string management chip. This proposed circuit based on the improved voltage transfer method is fabricated in 180‐nm Bipolar‐CMOS‐DMOS is correct technology, and...
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Citations
... However, in the lithium battery management system, the lithium battery management chip is responsible for determining the safety status of the battery and then achieving the safety of the lithium battery by controlling the external switches located outside the chip. Therefore, the switch is an indispensable part of a multi-cell battery management system or a one-cell lithium battery management system [10][11][12][13][14][15]. If the lithium battery management chip or switch fails, it leads to battery safety problems. ...
In this study, a new battery management chip is presented. By integrating discrete charging and discharging field effect transistors (FETs) into the battery management chip, there are adjusted to a single switch by switching the substrate of this internal switch. A new current detection method is designed to replace the external resistance sensor, which reduces the space overhead and cost of the battery management system. Compared with the conventional battery management chip, the proposed chip significantly improves the application density. Based on the 0.18 μm 5 V process, the circuit and switch were integrated into a one-cell battery management chip. Furthermore, the fabricated chip module demonstrates the effectiveness of the introduced architecture in reducing space for wearable applications.
... In the first category, as shown in Fig. 2(a), battery management systems have the switches at the Pack- [8][9][10]. In the second category, as shown in Fig. 2(b), battery management systems have the switches at the Pack+ [11,12]. ...
Herein is presented a battery management chip without external charging and discharging MOSFETs that promotes the miniaturization of wearable devices and reducing the size of battery management system on printed circuit boards (PCBs). The battery management chip is designed to integrate the discrete charging and discharging MOSFETs into the chip, even removing current sense resistor significantly. Using the proposed adaptive substrate selecting (ASS) technology, the same protection function of the traditional battery management chip is realized, which greatly saves the area cost of the chip. Based on the 0.18 μm 5 V process, the circuit and the switch have been integrated into a single lithium battery management chip. The measurements show that the chip can reliably protect the battery from overvoltage, under voltage and overcurrent with low power consumption.
