Battery

Abstract

The present invention relates to the technical field of energy storage devices, particularly to a battery, which comprises a battery core and protection plates, wherein the battery core comprises a first electrode sheet, a second electrode sheet, first electrode lugs and second electrode lugs, the polarity of the first electrode sheet is opposite to the polarity of the second electrode sheet, thefirst electrode lugs are arranged on the first electrode sheet, the second electrode lugs are arranged on the second electrode sheet, at least two first electrode lugs and at least two second electrode lugs are arranged, the multiple protection plates are arranged, and each protection plate is connected to the first electrode lugs and the second electrode lugs. According to the present invention,by increasing the numbers of the first electrode lugs, the second electrode lugs and the protection plates, the current shunt can be achieved with the added first electrode lug, the added second electrode lug and the added protection plate, such that the current applied on the single protection plate and the single electrode lug can be reduced so as to reduce the heat generated at the protection plate and the electrode lug, improve the safety of the battery, prolong the service life of the battery, and improve the user experience.

Description

technical field [0001] The present application relates to the technical field of energy storage devices, in particular to a battery. Background technique [0002] Batteries have been used more and more widely due to their advantages of high energy density and high environmental protection. With the continuous development of battery production technology, people's performance requirements for batteries are also gradually increasing, and battery safety is one of the more important indicators among many performance indicators of batteries. [0003] A traditional battery includes a bare cell and a protective plate. The bare cell mainly includes a cathode sheet, an anode sheet, a cathode tab on the cathode sheet, and an anode tab on the anode sheet. Only one cathode electrode is provided on each cathode sheet There is only one anode lug on each anode sheet, and the protective plate is connected with the cathode lug and the anode lug. After adopting this structure, when the batt...

AI Technical Summary

Problems solved by technology

After adopting this structure, when the battery is charging and discharging, the cathode tab, the anode tab and the protective plate connected to the cathode tab and the anode tab need to withstand a large current, according to the heat production Q=I 2 It can be seen from RT that the heat generated is proportional to the square of the current I, and the increase of the current I will cause the heating of the cathode tab, the anode tab and the protection plate to increase exponentially, resulting in poor safety of the battery, short service life, and user poor experience

Moreover, these problems are particularly significant when the battery is charged and discharged at a high rate

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