Over-charge and over-heat alarm protecting structure of soft-shell lithium battery

Abstract

The invention relates to an over-charge and over-heat alarm protecting structure of a soft-shell lithium battery, which comprises an accommodating box and a soft-shell battery cell, wherein a plate is arranged on the soft-shell battery cell, the top end in the accommodating box is provided with a protection and balance circuit board used for protecting and managing the-soft shell battery cell and connected with an external charge power supply, the protection and balance circuit board is connected with the soft-shell battery cell; the external charge power supply is electrically connected with the soft-shell battery cell through the protection and balance circuit board; a push switch is arranged on the side wall in the accommodating box, which corresponds to the plate, the push switch is connected with a switch mechanism on the protection and balance circuit board; and when the external charge power supply is used for over-charging the soft-shell battery cell, the soft-shell battery cell expands towards the direction of the push switch to trigger the push switch through the plate so that the push switch outputs a switching signal to the switch mechanism, and the switch mechanism switches off the connection of the soft-shell battery cell and the external charge power supply. The invention has the advantages of simple structure, convenience for use and installation, high reliability, prolonging of service life and reduction of use cost.

Description

technical field [0001] The invention relates to an alarm protection structure, in particular to an overcharge and overheat alarm protection structure for a soft-shell lithium battery, belonging to the technical field of soft-shell lithium battery protection. Background technique [0002] With the popularity of high-end mobile vehicles and mobile electronic devices, there is an increasing demand for soft-shell lithium batteries that are thinner, lighter and have higher energy density. However, if the above-mentioned lithium secondary battery is overcharged to form an overcharged state, unstable high oxides will be formed at the positive electrode, and the organic solvent in the electrolyte will also decompose and generate a large amount of flammable gas, and the battery core will bulge accordingly. and abnormal fever. If you continue to charge when the protection is lost at this time, it will cause safety problems. [0003] In the current battery protection technology, ther...

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned various overcharge protection devices have their own protective functions, some components and circuits may be worn out after long-term use, which affects reliability.

In addition, there are generally certain requirements for the strength of the electrode handle, so there is also the possibility that the protection device of the cutter type and the pressure relief valve may not be completely separated and cut off, and the protection device of the pressure relief valve of the hard-shell cylindrical lithium battery is also Not suitable for soft case lithium batteries

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