Lithium iron phosphate polymer lithium battery capable of realizing large current charging and discharging

Abstract

The invention discloses a lithium iron phosphate polymer lithium battery capable of realizing large current charging and discharging and is to provide the lithium iron phosphate polymer lithium battery capable of realizing large current charging and discharging and having good discharge capacity, good safety, good durability and high temperature resistance. The lithium iron phosphate polymer lithium battery comprises a battery core body, a battery housing wrapping the battery core body and an electrolyte filled inside the battery housing. The battery core body adopts a laminated structure, andcomprises a plurality of anode sheets and cathode sheets, which are stacked up. Each cathode sheet is located between two adjacent anode sheets; a diaphragm is arranged between the adjacent anode andcathode sheets; each anode sheet is formed by coating anode paste on an anode current collector; and each cathode sheet is formed by coating cathode paste on a cathode current collector. The invention is applied to the technical field of a lithium battery.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium iron phosphate lithium polymer battery that can be charged and discharged with a large current. Background technique [0002] With the development of science and technology and the progress of electrochemical materials and process technology, people continue to research and develop new battery materials and new batteries. Following nickel-cadmium and nickel-metal hydride rechargeable batteries, rechargeable lithium-ion batteries were developed in 1991, and polymer lithium batteries with better performance were introduced in 1995. [0003] The existing high-rate high-current charging and discharging lithium batteries use lithium cobalt oxide, ternary, and lithium manganese oxide as the positive electrode, and graphite as the negative electrode. The problems of the existing technology are: 1. Insufficient high-current discharge capacity; 2. Poor safety , In par...

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Problems solved by technology

[0003] The existing high-rate high-current charging and discharging lithium batteries use lithium cobalt oxide, ternary, and lithium manganese oxide as the positive electrode, and graphite as the negative electrode. The problems of the existing technology are: 1. Insufficient high-current discharge capacity; 2. Poor safety , especially large-capacity lithium batteries have flatulence, are easy to catch fire, and cannot pass safety tests such as heavy impact and acupuncture; 3. When overcharging, they are prone to flatulence and fail; 4. Poor high temperature resistance

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