A battery charging and discharging circuit with a multifunctional protection board
A charge-discharge circuit and protection circuit technology, applied in battery circuit devices, emergency protection circuit devices, circuit devices, etc., can solve the problem of not being able to achieve overcharge, over-discharge, over-temperature backflow prevention at the same time, insufficient protection board function, pressure and heat increase, to achieve the effect of simple structure, reasonable design and prevention of over-discharge
Active Publication Date: 2016-11-16
SOUTH CHINA NORMAL UNIVERSITY
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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.
Method used
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[0022] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0023] like figure 1 , 2 , 3, 4, a battery charging and discharging circuit with a multi-functional protection board, including a protection circuit, a charging circuit and a discharging circuit, in the present embodiment, the battery selects four series parallel battery packs, wherein, as figure 2 , the protection circuit includes two-way switch S2, the main switch S1, the battery, the chip U1 connected in sequence, and Q1, Q2 connected to the chip U1 respectively, Q1, Q2 are MOSFET-N, and the two-way switch S2 is respectively connected to the charging Circuit or discharge circuit connection, the chip U1 includes pin VDD, pin VSS, pin VM, pin DO, pin CO, wherein the pin VDD is connected to the positive pole of the battery after being connected in series with the resis...
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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 two major challenges facing the development of the energy industry in the world today, so it is urgent to develop new energy sources for power batteries. Power batteries have been widely used in human life and work, and were used in old-fashioned push-button 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. At the same time as the wide application of this type of industry, the requirements for battery power have also made a qualitative leap. Due to the multi-functions of touch-screen mobile phones and tablet computers, the capacity of lithium-i...
Claims
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IPC IPC(8): H02J7/00H02H7/18
Inventor 李小平胡佳娜郑耀贤林海斌张远明黄伟昭邱显焕李伟善
Owner SOUTH CHINA NORMAL UNIVERSITY