Maintainable lithium battery

Abstract

The invention provides a maintainable lithium battery. The maintainable lithium battery comprises a packaging structure as well as a battery positive pole, a diaphragm, a battery negative pole and an electrolyte in the packaging structure , wherein a pressure control valve is added at the top of the packaging structure, the pressure control valve sequentially comprises an outer sleeve, a sealing sleeve and a cylinder shaft from outside to inside, and a circular stainless steel foil is fixedly connected to the bottom of the outer sleeve; a circular hole is formed in the axis of the cylinder shaft, one end of the circular hole extends to the bottom of the cylinder shaft and penetrates through the stainless steel foil, and the other end of the circular hole is communicated with a transversal lateral lead-out hole formed in the upper part of the cylinder shaft; a crimping spring sleeves the lower part of the cylinder shaft, and the top of the crimping spring contacts the bottom of the sealing sleeve. The maintainable lithium battery provided by the invention has the beneficial effects of a function of realizing interior pressure adjustment, a function of realizing replacement of the electrolyte of the lithium battery, and a function and a performance of realizing regeneration of the lithium battery, and the cycle life of the lithium battery is prolonged.

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

Images