Battery charge and discharge circuit with multifunctional protection plate

Abstract

The invention discloses a battery charge and discharge circuit with a multifunctional protection plate. The battery charge and discharge circuit with the multifunctional protection plate comprises a protection circuit, a charge circuit and a discharge circuit. The protection circuit comprises two switches S2, a main switch S1, a battery, a chip U1, a Q1 and a Q2, wherein the two switches S2, the main switch S1, the battery and the chip U1 are sequentially connected, and the Q1 and the Q2 are connected with the chip U1. The Q1 and the Q2 are MOSDET-Ns, and the two switches S2 are respectively connected with the charge circuit or the discharge circuit. According to the battery charge and discharge circuit with the multifunctional protection plate, the three effects of over-current prevention, over-voltage prevention and over-temperature prevention can be achieved, and it is ensured that the battery or a battery pack is in a safety state all the time in the charge and discharge process.

Description

Technical field [0001] The invention relates to the technical field of battery management, in particular to a battery charging and discharging circuit with a multifunctional protection board. Background technique [0002] Energy shortage and environmental pollution are the two major challenges facing the development of the energy industry in the world today. Therefore, it is urgent to develop new power batteries. Power batteries have been widely used in human life and work, and were used in old-fashioned key mobile phones in the early days. With the development of social economy and technology, there are many kinds of electronic products on the market today, such as touch screen mobile phones, tablet computers and so on. While this type of industry is widely used, there is also a qualitative leap in battery power requirements. Due to the multi-functions of touch-screen mobile phones and tablet computers, the current capacity of lithium-ion batteries on the market can only suppo...

AI Technical Summary

Problems solved by technology

However, under the conditions of overcharge, overdischarge, overtemperature or external circuit short circuit, etc., the pressure and heat of the lithium-ion battery will increase greatly, which will easily cause electric sparks, combustion and even explosion. Therefore, there is no doubt that the lithium-ion battery needs an additional protect the circuit

At present, the protection board functions of most power supply products are not perfect, and cannot simultaneously achieve several major functions such as overcharge, overdischarge, overtemperature, and anti-backflow.

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