Electrode rupture protection circuit for series battery pack based on discrete components

Abstract

The invention discloses a series battery pack electrode rupture protection circuit based on discrete components, including: a protection circuit connected to each single battery in the series battery pack; wherein: the protection circuit includes: MOS tubes and parasitic diodes; wherein : The drain of the MOS tube is connected to the positive pole of the single battery, and the source of the MOS tube is connected to the negative pole of the single battery. The invention uses parasitic diodes to play the role of clamping diodes when the electrodes of the series battery pack are broken, thereby avoiding the huge negative voltage caused by the breakage of the electrodes of the series battery pack. Through the MOS tube connected to each single battery, When the electrode of the series battery pack is broken, it can play the role of continuous flow, so as to prevent the large current from flowing to the signal current or the low power circuit when the electrode of the series battery pack breaks.

Description

technical field [0001] The invention relates to the technical field of protection of series battery packs, more specifically, to a protection circuit for electrode rupture of series battery packs based on discrete components. Background technique [0002] During the discharge process of the series battery, if an electrode is disconnected, the original discharge circuit will be forcibly interrupted. Due to the load, the voltage at the disconnected electrode will deviate far from the rated value, and the connection to this electrode will be burnt. Electronic circuits, such as analog front ends, etc. For example, assuming that there are N batteries connected in series, and the voltage of a single battery is V, then the voltage at the positive terminal of the M battery is originally M*V. *R-L*di / dt-(N-M)*V, where R is the load resistance, it can be seen that the sampling voltage at this time may be a fairly large negative voltage, and the voltage range of the positive and negat...

AI Technical Summary

Problems solved by technology

[0003] If the series battery pack is in a state of high current discharge, the discharge circuit is suddenly disconnected, due to the effect of lead inductance, a peak voltage will be generated at the disconnection, which will burn out the circuit connected to it, or a large current will pass through the circuit connected to it. The electronic circuit of the electronic circuit forms a freewheeling circuit. Since the battery pack takes a large current, the battery detection circuit connected to it is a signal current, or a small power circuit for equalization, which is not at the same level as the main circuit. , none of these circuits can withstand the high current of the main circuit, so it will burn out the circuit

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