Insufficient voltage activating device for lithium battery

Abstract

The invention discloses an insufficient voltage activating device for a lithium battery and relates to the technical field of lithium battery charging equipment. The insufficient voltage activating device comprises a lithium battery charging management IC (integrated circuit) and an activating circuit, wherein the activating circuit comprises an MCU (micro control unit) and a current-limiting float charging circuit, wherein a control output pin I / O of the MCU is connected with the enabled pin EN of the lithium battery charging management IC, and a third analog quantity input pin AD3 of the MCU is connected with the lithium battery and used for detecting the voltage of the lithium battery; one end of the current-limiting float charging circuit is connected with a power Vin, the other end of the current-limiting float charging circuit is connected with the lithium battery, and a current control end used for controlling the magnitude of current outputted by the current-limiting float charging circuit is connected with an analog quantity output pin DA of the MCU. The insufficient voltage activating device solves the technical problem in the prior art that a lithium battery is inconvenient to activate in the insufficient voltage state. The insufficient voltage activating device can activate the lithium battery in the insufficient voltage state, has high safety and reliability, facilitates prolonging the service life of the lithium battery, and is low in price.

Description

technical field [0001] The invention relates to the technical field of lithium battery charging equipment, in particular to a lithium battery power loss activation device. Background technique [0002] Lithium batteries include lithium metal batteries and lithium ion batteries, among which lithium ion batteries are a kind of rechargeable batteries, which mainly rely on lithium ions to move between positive and negative electrodes to work. When the products using lithium-ion batteries are idle for a long time, the phenomenon that the batteries cannot be charged will occur. ion battery. There are two situations for a lithium battery that has lost power: one is that the battery cell is damaged and can no longer be used; the other is that the battery cell is not damaged and can continue to be used after activation. [0003] At present, most lithium battery charging management ICs (charging management chips) on the market do not have the function of lithium battery power loss a...

AI Technical Summary

Problems solved by technology

[0003] At present, most lithium battery charging management ICs (charging management chips) on the market do not have the function of lithium battery power loss activation; a small number of lithium battery charging management ICs have 0V charging function (that is, battery power loss activation function), Charge management ICs are expensive and not suitable for the purchasing power of most consumers; there are also a few pure hardware circuit devices that directly float charge to activate lithium batteries, and such pure hardware circuit devices cannot control the charging current and charging time , there is a serious safety hazard, and it will also shorten the service life of the lithium battery

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