Lithium battery protection module and packaging method thereof, lithium battery charging and discharging power supply system

Abstract

The present invention provides a lithium battery protection module and its packaging method, and a lithium battery charging and discharging power supply system, wherein the lithium battery protection module at least includes: a packaging frame, the packaging frame at least includes a packaging frame base and a The package frame pins on both sides of the base; the field effect tube located on the package frame base; wherein, the field effect tube is wire-bonded with the package frame pins, and the area of ​​the field effect tube is the same as that of the package The area of ​​the frame base is adapted; the insulating material layer located on the field effect tube; and the lithium battery protection chip located on the insulating material layer; wherein, the lithium battery protection chip and the field effect tube, the The package frame pins are wire bonded. The lithium battery protection module of the present invention adopts a multi-chip laminated packaging form, and the lithium battery protection chip is stacked on the field effect transistor, and is electrically isolated through an insulating material layer, and realizes the overtemperature protection function of the field effect transistor.

Description

technical field [0001] The invention relates to the technical field of lithium battery charging and discharging, in particular to a lithium battery protection module, a packaging method thereof, and a lithium battery charging and discharging power supply system. Background technique [0002] In the current lithium battery charging and discharging power supply system, the lithium battery voltage overvoltage, undervoltage or overcurrent may occur during the charging and discharging process of the lithium battery. Effect tube, so as to protect the lithium battery charge and discharge power supply system. Among them, such as figure 1 Shown is a schematic diagram of a lithium battery protection module in the prior art, which mainly includes a lithium battery protection IC (Li-ion battery protection IC) and two field effect transistors M1 and M2. [0003] In the lithium battery protection module in the prior art, the lithium battery protection chip and the field effect transisto...

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Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the object of the present invention is to provide a lithium battery protection module and its packaging method, and a lithium battery charging and discharging power supply system, which are used to solve the problem that the field effect transistor cannot be effectively realized in the prior art. temperature detection, and the conduction resistance of the FET is large, which is not conducive to the battery life, and there is no space in the battery pack to place other smart chips, the space utilization of the battery pack is low, and the battery capacity is low.

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