A maintainable lithium battery

Abstract

The present invention provides a maintainable lithium battery, including a packaging structure and a positive electrode of the battery, a diaphragm, a negative electrode of the battery, and an electrolyte; a pressure control valve is added to the top of the packaging structure, and the pressure control valve is sequentially arranged from outside to inside It includes a jacket, a sealing sleeve and a cylindrical shaft, and a round stainless steel foil is fixedly connected to the bottom of the jacket; a round hole is provided at the center of the cylindrical shaft, and one end of the round hole extends to the bottom of the cylindrical shaft to pass through The other end of the stainless steel foil communicates with the lateral outlet hole provided on the upper part of the cylindrical shaft; the lower part of the cylindrical shaft is sleeved with a crimping spring, and the top of the crimping spring is in contact with the bottom of the sealing sleeve. The beneficial effects of the present invention are as follows: it has the function of adjusting the internal pressure; it has the function of replacing the electrolyte of the lithium battery, can regenerate the function and performance of the lithium battery, and prolong the cycle life of the lithium battery.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a maintainable lithium battery which can adjust the internal gas pressure of the lithium battery at any time and can replace the electrolyte in the lithium battery at any time. Background technique [0002] At present, the packages of lithium batteries that can be seen on the market are fully enclosed lithium batteries that cannot be maintained internally, because the electrolyte of lithium batteries is highly volatile at room temperature and the crystals of metal lithium will burn violently in the air. , so the lithium battery structure requires that the internal materials of the battery be completely isolated from the external air. The one-time closed battery structure is the easiest structure to realize, and it became the most common structure in the early stage of the development of the lithium battery industry. [0003] In the prior art, the closed she...

AI Technical Summary

Problems solved by technology

Therefore, the primary sealing structure of the lithium battery cannot be maintained, and can only be used for one time and scrapped for one time.

[0004] When a lithium battery is used in a vehicle energy storage device, if it is used in a charge-discharge cycle per day, a set of lithium batteries can only be used for 1.5-5.5 years; compared with the 14-year service life of the vehicle, it needs to be replaced many times. The price of lithium batteries on the market is very high, accounting for more than 50% of the total cost of pure electric vehicles; therefore, it is necessary to develop a lithium battery with a long cycle life that is long enough to meet the 14-year service life of the vehicle, and has become an important part of the lithium battery industry. and key technologies to be broken through

[0005] Also existing lithium battery itself does not have internal pressure detection function

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