Lithium battery protection board circuit based on zero-ohm resistance element

Abstract

The invention discloses a lithium battery protection board circuit based on a zero-ohm resistance element. The lithium battery protection board circuit based on the zero-ohm resistance element comprises a first control switch, a second control switch, a PTC overcurrent temperature protector, a first microcontroller, a second microcontroller, an interface circuit, resistors from a first one to a fourteenth one, capacitors from a first one to a thirteenth one, a first diode and a second diode, wherein the twelfth resistor is in single point grounding, the thirteenth resistor is a jump-joint, and both the twelfth resistor and the thirteenth resistor are zero-ohm resistors. According to the lithium battery protection board circuit based on the zero-ohm resistance element, direct SMT can be achieved when the zero-ohm resistors play the role of the jump-point, traditional manual welding jump-points are simplified, and therefore machining time in the production and manufacturing process is shortened; when the zero-ohm resistors are all in jump-point single point grounding, in the process of a PCB design, a ground line is divided into two networks, errors are not prone to occur in the process of processing like large-area copper pouring, and in addition, the ground line can be used as a fuse; when the zero-ohm resistors play a role in crossover, in the process of the PCB design, the number of layers of PCBs can be reduced, and therefore machining cost of the PCBs is saved, and the PCBs are relatively attractive and convenient to install.

Description

technical field [0001] The invention relates to a lithium battery protection board circuit, in particular to a lithium battery protection board circuit based on a 0 ohm resistance element. Background technique [0002] Usually: 1. As long as it is ground, it must be connected together in the end. The PCB board drawing process of the battery is to bundle the analog ground and the digital ground separately, and then connect the two together through a line. 2. Design the jump point to provide convenience for the repair process. 3. When the wiring on the same surface of the PCB is blocked, additional layers will be added to route the wiring. [0003] At present, the market is basically designed according to this scheme. If a 0 ohm resistor is used, the price is good and the quality is cheap. 1. Use a 0 ohm resistor to connect the analog ground and the digital ground instead of directly connecting them together. The advantage of this is that the ground wire is divided into tw...

AI Technical Summary

Problems solved by technology

Due to the large fusing current of the traces on the PCB, if a fault such as short circuit and overcurrent occurs, it is difficult to fuse, which may cause a greater accident

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