High-power pulse battery capacitor and preparation method thereof

Abstract

The invention discloses a high-power pulse battery capacitor. The high-power pulse battery capacitor comprises an anode, a cathode, an isolating membrane and electrolyte lithium salt, wherein the anode comprises, by weight, 40-80 parts of multi-component composite lithium oxide, 10-40 parts of activated carbon, 1-20 parts of polyvinylidene fluoride adhesive and 1-20 parts of sodium carboxymethyl cellulose; the cathode comprises, by weight, 50-90 parts of graphite, 1-20 parts of activated carbon, 1-20 parts of styrene butadiene rubber and 1-20 parts of sodium carboxymethyl cellulose; the electrolyte lithium salt comprises lithium hexafluorophosphate and lithium tetrafluoroborate. The high-power pulse battery capacitor overcomes the defect that a traditional capacitor is large in self-discharge. The invention further discloses a preparation method of the high-power pulse battery capacitor.

Description

Technical field [0001] The invention relates to the field of battery capacitors, more specifically it is a high-power pulse battery capacitor. The invention also relates to a method for preparing a high-power pulse battery capacitor. Background technique [0002] With the development of communication and smart meter technology, higher requirements are put forward for the current output capability, operating temperature, and service life of the power supply; such as automatic meter reading, smart water meter and communication applications without mains supply; current Most of the solutions use power-type lithium sub-batteries, but lithium sub-batteries have unstable power output and lag problems. [0003] The parallel combination of lithium sub-energy battery and capacitor: the superior high-power pulse performance of the capacitor shares most of the high load, thereby improving the high power output capacity of the combined battery; after the two are used in parallel, the lithium ...

AI Technical Summary

Problems solved by technology

[0006] The existing patent number is CN201510004218.9, and the patent name is "A New Type of Battery Capacitor Based on Composite Positive and Negative Electrode Materials". The main positive electrode material is lithium manganese oxide. The material itself is unstable and easy to decompose to generate gas. The cycle life of the product The attenuation is fast, the service life is relatively short, the main material of the negative electrode is lithium titanate, the specific capacity of lithium titanate is low, and the tap density is relatively low, that is, the capacity per unit volume is small, which will lead to low energy density of the product, poor material conductivity, and large current discharge. The performance is not good, and there is a problem of gas production;

[0007] The existing patent number is CN201510589365.7, and the patent name is "Battery Capacitor Based on Composite Nickel-Cobalt-Aluminum / Lithium Titanate System and Its Preparation Method". Lithium titanate, lithium titanate has low specific capacity and relatively low tap density, that is, small capacity per unit volume, which will lead to low energy density of the product; the material has poor conductivity, poor high-current discharge performance, and there is a problem of gas production

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