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Auxiliary power unit

A technology of auxiliary power supply and charger, which is applied in the direction of circuit devices, battery circuit devices, circuits, etc., can solve problems such as capacity degradation and safety issues of auxiliary power supply devices, and achieve the effects of suppressing capacity degradation and fully miniaturizing

Inactive Publication Date: 2007-02-14
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, in the above-mentioned auxiliary power supply device, metal lithium is easily precipitated on the negative electrode during charging, and if it is used repeatedly, not only the capacity of the auxiliary power supply device will be significantly deteriorated, but also problems will arise in terms of safety.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] Firstly, the positive electrode active material layer was fabricated according to the following steps. First, prepare the LiMn used as the cathode active material 0.33 Ni 0.33 co 0.34 o 2 (the numeral of subscript is atomic ratio), as the carbon black of conduction aid, as the polyvinylidene fluoride (PVDF) of binding agent, make their weight ratio be positive electrode active material: conduction aid: binding agent= After mixing and dispersing with a planetary mixer at a ratio of 90:6:4, an appropriate amount of N-methylpyrrolidone (NMP) was mixed therein as a solvent to adjust the viscosity to prepare a slurry-like coating liquid (slurry) for a positive electrode active material layer.

[0103] Next, an aluminum foil (thickness: 20 μm) was prepared, and the coating liquid for the positive electrode active material layer was applied on the aluminum foil by a doctor blade method and dried to form a positive electrode active material layer. Then, the coated positive ...

Embodiment 2

[0112] Example 2 is the same as Example 1 except that an auxiliary lithium ion secondary battery in which the thickness of the positive electrode active material layer and the negative electrode active material layer are each 30 μm is used.

Embodiment 3

[0114] Example 3 is the same as Example 1 except that an auxiliary lithium ion secondary battery in which the thicknesses of the positive electrode active material layer and the negative electrode active material layer are each 40 μm is used.

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PUM

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Abstract

An auxiliary power unit of the present invention has an auxiliary lithium-ion secondary battery, a charge connector connected to the auxiliary lithium-ion secondary battery and adapted to receive power from an external charger, and a supply connector connected to the auxiliary lithium-ion secondary battery and adapted to supply power of the auxiliary lithium-ion secondary battery to an external portable device, and the auxiliary lithium-ion secondary battery is constructed so that each of thicknesses of cathode active material and anode active material layers is in the range of 10 to 40 mum.

Description

technical field [0001] The invention relates to an auxiliary power supply device. Background technique [0002] The demand for various portable devices such as mobile phones, PDAs, and notebook PCs driven by lithium-ion secondary batteries has been increasing due to the high-performance of lithium-ion secondary batteries in recent years. In order to charge the main lithium ion secondary battery of such a portable device, it is generally necessary to connect a charger dedicated to the main lithium ion secondary battery of each portable device to the portable device, and to drive the charger with an AC power source. However, such charging while out and about is often difficult. Therefore, there is a demand for an auxiliary power supply device that can easily supply electric power to a portable device when going out. [0003] In this way, for example, as disclosed in Japanese Patent Application Laid-Open No. 2004-111227, an auxiliary lithium secondary battery is known to incl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/02H01M2/10H01M4/13H01M4/131H01M4/133H01M4/134H01M10/05H01M10/052H01M10/058
CPCH01M10/46Y02E60/122H01M10/425H02J7/0054H01M10/0525H01M10/0585H01M2/1061H02J7/0042H01M2004/021H02J7/342Y02E60/10Y02P70/50
Inventor 饭岛刚小川和也
Owner TDK CORPARATION
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