Driving circuit for driving NMOS (N-channel metal oxide semiconductor) tube connected with positive electrode of battery pack
A technology of driving connection and driving circuit, applied in the field of driving circuit of NMOS transistor, can solve the problems of expensive special chip and high cost of battery management system, and achieve the effect of reducing cost
Pending Publication Date: 2022-08-05
HUIZHOU SUNWAY ELECTRONICS CO LTD
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Problems solved by technology
However, dedicated chips are expensive, leading to high cost of battery management systems
Method used
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[0026] In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. The preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.
[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for the purpose of illustration only ...
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The invention discloses a driving circuit for driving an NMOS (N-channel metal oxide semiconductor) tube connected with a positive electrode of a battery pack. The driving circuit comprises a single chip microcomputer, a driving module, an energy storage module, an NMOS tube power supply module, a trigger module, an optocoupler driving module and a positive electrode NMOS tube Q2. A PWM signal output by the single chip microcomputer is driven by the driving module and then is input to an input control end of the energy storage module; the energy storage module charges the NMOS tube power supply module; the output control end of the NMOS tube power supply module is connected with the input end of the trigger module, and the output end of the trigger module is connected with a trigger pin Det of the single-chip microcomputer. The NMOS tube power supply module supplies power to the optocoupler driving module; the single-chip microcomputer drives the positive NMOS transistor Q2 through the optocoupler driving module after receiving a trigger signal of the trigger module. According to the driving circuit for driving the NMOS transistor connected with the positive electrode of the battery pack, discrete components are adopted to form the driving circuit for the NMOS transistor connected with the positive electrode of the battery pack, and the implementation cost is low.
Description
technical field [0001] The invention relates to the technical field of battery management systems, in particular to a driving circuit for driving an NMOS tube connected to a positive electrode of a battery pack. Background technique [0002] In the battery management system, the NMOS tube is usually placed at the negative end of the battery pack to control the output of the negative pole of the battery pack. In the prior art, a PMOS tube can also be used to connect the disputes of the battery pack to control the positive output of the battery pack. However, the internal resistance of the PMOS tube is large, and it is not suitable for the application of high current occasions. [0003] Therefore, in order to take into account high current applications, it is still necessary to select an NMOS transistor to be connected to the positive electrode of the battery pack. In the prior art, the NMOS transistor connected to the positive electrode of the battery pack needs to be drive...
Claims
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Login to View More IPC IPC(8): H03K17/687H03K7/08
CPCH03K17/6871H03K7/08Y02E60/10
Inventor 林少青张争张伟欧思翊
Owner HUIZHOU SUNWAY ELECTRONICS CO LTD