Lithium battery protection device

Abstract

The invention discloses a lithium battery protection device capable of greatly reducing the power consumption of a charging balance manager, which comprises the charging balance manager, wherein one power input end of the charging balance manager is connected with a corresponding electrode of a lithium battery, and the other power input end of the charging balance manager is connected with the other electrode of the lithium battery through a current-limiting resistor; and two ends of the current-limiting resistor are connected in parallel with a normally open switch. The current-limiting resistor is additionally arranged in the lithium battery protection device, and is usually a megohm-grade resistor so as to greatly reduce the power consumption of the charging balance manager; therefore, under the condition that the lithium battery is not charged for 6 to 8 months, the lithium battery still has more than 60 percent of stored energy to ensure the normal use of equipment powered by the lithium battery, such as power sedans and the like.

Description

technical field [0001] The invention relates to a lithium battery, in particular to a protection device for the lithium battery. Background technique [0002] There are two types of lithium-ion batteries and lithium-polymer batteries. It is a device that directly converts the chemical energy of its internal active materials into electrical energy through electrochemical oxidation-reduction reactions. However, due to the characteristics of the lithium battery itself and for the purpose of safe use, all lithium battery packs or single-cell batteries are equipped with a circuit to protect the lithium battery - a charge balance manager. The current charge balance manager is directly connected to the lithium battery. The charge balance manager has been consuming the energy of the lithium battery, and the lithium battery cannot be charged for a long time. For example, it usually takes 6 to 8 months from the factory to the user's first use, or in the actual use of the user, due to ...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of the lithium battery itself and for the purpose of safe use, all lithium battery packs or single-cell batteries are equipped with a circuit to protect the lithium battery - a charge balance manager. The current charge balance manager is directly connected to the lithium battery. The charge balance manager has been consuming the energy of the lithium battery, and the lithium battery cannot be charged for a long time. For example, it usually takes 6 to 8 months from the factory to the user's first use, or in the actual use of the user, due to business trips and other reasons After several months of being idle, the energy stored in the lithium battery is basically exhausted, which affects the normal use of related equipment, such as: a lithium battery-powered car

In addition, since the positive and negative poles of the lithium battery are directly drawn out, no matter whether the charger matches the charge balance manager, the lithium battery can be charged forcibly, which will cause damage to the lithium battery and greatly affect the quality of the lithium battery. The service life of the lithium battery; moreover, this structure that leads directly to the outside is also very prone to short circuit, which will cause damage to the lithium battery and affect the service life of the lithium battery

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