Lithium-iron battery positive tab and lithium-iron battery

Abstract

The invention provides a lithium-iron battery positive tab and a lithium-iron battery, which relate to the technical field of batteries. The positive tab is in the shape of a long sheet, including a first tab, a second tab and a Three tabs, the material of the first tab is aluminum, the material of the second tab is aluminum-nickel composite material, and the material of the third tab is nickel or copper-nickel composite material. The material of the positive tab is relatively hard, with high internal resistance and high heat generation. Under the action of external forces such as extrusion, acupuncture and impact, it is easy to cause the battery to burn or explode, leading to technical problems of safety accidents. The material of the positive tab of the lithium-iron battery provided by the invention is relatively soft, and the internal resistance is small, which not only improves the discharge performance of the lithium-iron battery, but also does not pierce the diaphragm under the action of external forces such as extrusion, impact and acupuncture. , has improved the safety performance of lithium-iron batteries.

Description

Technical field [0001] The present invention relates to the field of battery technology, in particular, to a lithium iron battery positive electrode ear and a lithium iron battery. Background technique [0002] With the continuous advancement of electronic information technology, consumer electronics continue to develop, miniaturize, high-power trend, and the performance requirements of the battery are also rapidly improved, requiring battery energy density, high power density, price Suitably, easy to use, low self-discharge rate, long storage service, especially the energy density and power density of the battery, and is increasingly demanding. [0003] The secondary battery is rapidly developed due to repeated use of charging, but due to its low capacity, high self-discharge rate, short storage time, poor safety performance, and after use, the model is not standardized and universal, and the model is unable to replace the battery. The primary battery has been rapidly developed ...

AI Technical Summary

Problems solved by technology

[0003] Secondary batteries have been rapidly developed because they can be recharged and reused, but they cannot replace primary batteries due to their low primary capacity, high self-discharge rate, short storage time, poor safety performance, need to be charged after use, unstandardized models, and poor versatility. The primary battery has developed rapidly in recent years due to its advantages of high primary capacity, slow discharge level, standardized model and good versatility.

[0004] The positive tabs in the existing lithium-iron batteries are generally nickel-plated steel strips, which are used to fix the positive plate and the cap. Under the action of external forces such as acupuncture and impact, it is easy to pierce the diaphragm, cause a short circuit, cause the battery to burn or explode, and cause a safety accident

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