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Button lithium ion capacitor and fabrication method thereof

A lithium-ion and capacitor technology, applied in the field of lithium-ion capacitors, can solve the problems of limited capacity of one-time button-type lithium batteries, unable to meet normal work, slow development of button batteries, etc., to achieve low cost, low leakage and self-discharge, Small size effect

Inactive Publication Date: 2018-02-16
ANHUI TONGFENG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These emerging electrical appliances have higher and higher requirements for matching batteries. Due to the limited capacity of disposable button lithium batteries, especially after the development of miniaturization and thinning, the frequent replacement of batteries makes it unable to meet the needs, so There is an increasing demand for small, rechargeable button-type batteries
However, the development of small rechargeable button batteries is very slow. On the one hand, the charge and discharge life of button batteries has not been solved. When discharged, the life is shorter
[0008] Under certain extreme high temperature or low temperature environment conditions, since the operating temperature of ordinary lithium-manganese batteries is -20~60°C, it cannot meet the normal operation of the equipment in extreme high temperature environments (70°C) or extremely low temperature environments (-40°C)

Method used

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  • Button lithium ion capacitor and fabrication method thereof
  • Button lithium ion capacitor and fabrication method thereof
  • Button lithium ion capacitor and fabrication method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Positive electrode: Dissolve supercapacitor activated carbon: Ketjen black: PVDF into N-methylpyrrolidone with a mass ratio of 90:5:5, with a solid content of 30%, and then transfer the mixture into a planetary mixer at a speed of 3000R / It was stirred for 4 hours to form a slurry emulsion and then filtered and aged for 8 hours. Filter the aged positive electrode slurry and transfer it to the hopper of the die-slit coating machine, and continuously coat it on both sides of the porous aluminum foil with a thickness of 25um and a porosity of 60%, and transfer it after coating Carry out preliminary blast drying in the blast oven of the coating machine, the blast temperature is 60-100°C, and the transfer speed is 6m / min. After coating and drying, transfer the wound positive pole piece to a roller press for rolling. The pressure between the two rollers is 1T, and the rolling speed is 6m / min. After the rolling is completed, it is rolled. The parameter of the pole piece after...

Embodiment 2

[0036] Manufacture LIC according to the method of Example 1, the difference is that: the positive electrode raw material is supercapacitor activated carbon: acetylene black: PVDF dissolved in N-methylpyrrolidone with a mass ratio of 91:4.5:4.5, and the solid content is 31%. Others are all the same as in Example 1.

Embodiment 3

[0038] Manufacture LIC according to the method of Example 1, the difference is that: the positive electrode raw material is supercapacitor activated carbon: acetylene black: ternary lithium NCA: PVDF is dissolved in N-methylpyrrolidone with a mass ratio of 80:6:8:6 , the solid content was 32%, and then the mixture was transferred to a planetary mixer, stirred at a speed of 2500 R / min for 3 hours to form a slurry emulsion, and then filtered and aged for 6 hours. After filtering the aged positive electrode slurry, transfer it to the hopper of the die-slit coating machine, and continuously coat it on both sides of the porous through-through aluminum foil with a thickness of 20um and a porosity of 50%, and transfer it after coating Carry out preliminary blast drying in the blast oven of the coating machine, the blast temperature is 60-100°C, and the transfer speed is 8m / min. After coating and drying, transfer the wound positive pole piece to a roller press for rolling. The pressur...

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Abstract

A button lithium ion capacitor comprises a positive shell (1), a positive pole plate, a negative pole plate, a separator (7), an electrolyte, a built-in lithium pole, a negative shell (2), a rubber ring (5) and a cushion ring (6), wherein the positive pole plate comprises a positive current collector and a positive electrode material (3), the positive electrode material comprises a positive activesubstance, a conductive agent and a binding agent, the negative pole plate comprises a negative current collector and a negative electrode material, and the negative electrode material comprises a negative active substance, a conductive agent and a binding agent. The button lithium ion capacitor has the advantages of small size, high energy density and power density, low electric shock and self discharging, long lifetime more than or equal to 0.8 million times, deep charging, deep discharging, high voltage, wide working temperature being (-40)-70 DEG C and maintenance free, the voltage of thesingle capacitor is 3.8V, the voltage of the two capacitors connected in series is 7.6V, and rapid discharging by 100 C can be achieved; and the fabrication method of the button capacitor, provided by the invention, is simple and is high in efficiency and low in cost, and industrial production and application are facilitated.

Description

technical field [0001] The present invention relates to lithium ion capacitor, particularly button type lithium ion capacitor and its [0002] Preparation. Background technique [0003] With the development of modern science and technology, the optimized design of electrical appliances, more and more pocket-sized, portable, memorized, and intelligent electrical appliances and equipment, such as smart meters, smart gas meters, smart water meters, Bluetooth headsets, hearing aids, routers, driving Recorders, cameras, smart home appliances, computer motherboards and PLC system boards, etc. These emerging electrical appliances have higher and higher requirements for matching batteries. Due to the limited capacity of disposable button lithium batteries, especially after the development of miniaturization and thinning, the frequent replacement of batteries makes it unable to meet the needs, so There is an increasing demand for small, rechargeable button-type batteries. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/50H01G11/86
CPCY02E60/13H01G11/50H01G11/86
Inventor 何诚龙方夕刚章晓红孙煜尚晓慧唐忠民唐兵王晓云
Owner ANHUI TONGFENG ELECTRONICS