Lithium battery protection circuit and protection method therefor

A technology for protecting circuits and lithium batteries. It is applied in the direction of emergency protection circuit devices and electrical components. It can solve the problems of reducing the number of rechargeable times, difficulty in ensuring battery safety, and deterioration of battery characteristics and durability. It can reduce the number of rechargeable times, Prevent spontaneous combustion or rupture, and prevent deterioration of battery characteristics and durability

Pending Publication Date: 2018-04-10
YUNNAN JUCHENG TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a lithium battery protection circuit and its protection method, which solves the difficulty of ensuring the safety of the battery, the risk of spontaneous combustion or rupture, resulting in deterioration of battery characteristics and durability, thereby reducing rechargeable Question of number of times

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  • Lithium battery protection circuit and protection method therefor

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] Embodiments of the present invention provide a lithium battery protection circuit and a protection method thereof, such as figure 1 As shown, it includes control IC1, the digital switch output terminal of control IC1 is connected to the first metal oxide semiconductor field effect transistor 2 circuit, and the control IC1 is respectively connected to the first capacitor 3 and the first resistor 4 circuit, and the digital switch of control IC1 The quanti...

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Abstract

The invention discloses a lithium battery protection circuit and a protection method thereof, and relates to the technical field of lithium battery protection. The battery protection circuit and the protection method thereof include a control IC, the digital switch output terminal of the control IC is connected with the first metal-oxide-semiconductor field effect transistor circuit, and the control IC is respectively connected with the first capacitor and the first resistance circuit, The digital switch output terminal of the control IC is connected to the second MOSFET circuit, and the control IC is connected to the second capacitor circuit, and the power supply voltage terminal of the control IC is respectively connected to the third capacitor and the second resistor circuit. connect. The lithium battery protection circuit and its protection method solve the situation that it is difficult to ensure the safety of the battery, greatly avoid the risk of spontaneous combustion or rupture, prevent the deterioration of battery characteristics and durability, and reduce the number of rechargeable times. The function of battery protection improves the service life of the battery.

Description

technical field [0001] The invention relates to the technical field of lithium battery protection, in particular to a lithium battery protection circuit and a protection method thereof. Background technique [0002] In recent years, more and more products such as PDAs, digital cameras, mobile phones, portable audio devices and Bluetooth devices use lithium batteries as the main power source; lithium batteries have small size, high energy density, no memory effect, high cycle life, and high voltage. The advantages of battery and low self-discharge rate are not the same as nickel-cadmium and nickel-metal hydride batteries. Lithium batteries must consider the safety of charging and discharging to prevent deterioration of characteristics; for lithium batteries, overcharge, overdischarge, overcurrent and Short circuit protection is very important, so a protection circuit is usually designed in the battery pack to protect the lithium battery. [0003] Due to the high energy densi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/18
CPCH02H7/18
Inventor 金瑞雪付承艳李承金
Owner YUNNAN JUCHENG TECH
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