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Stacking nonaqueous electrolytes battery and manufacturing method thereof and stacking equipment

A technology of non-aqueous electrolyte and stacking equipment, which is applied in the field of stacking non-aqueous electrolyte batteries and their manufacturing and stacking equipment, and can solve problems such as battery short circuit, short circuit, abnormal heating, etc.

Active Publication Date: 2008-08-27
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the anode 1 is larger than the separator 3 and thus relative to the cathode 2, as shown in FIG. , causing problems such as short circuit and abnormal heat generation in the battery
Furthermore, as shown in FIG. 1C, when the anode 1 is larger than not only the separator 3 but also the cathode 2, lithium 4 is accumulated on the edge portion of the cathode 2, and dendrites are formed, thereby causing a short circuit

Method used

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  • Stacking nonaqueous electrolytes battery and manufacturing method thereof and stacking equipment
  • Stacking nonaqueous electrolytes battery and manufacturing method thereof and stacking equipment
  • Stacking nonaqueous electrolytes battery and manufacturing method thereof and stacking equipment

Examples

Experimental program
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Effect test

example 1

[0103] Manufacturing anodes

[0104] By uniformly mixing 92wt% lithium cobalt oxide (LiCoO 2), 3 wt% of powdered polyvinylidene fluoride and 5 wt% of powdered graphite to prepare an anode mixture, and the mixture was dispersed into N-methyl-2-pyrrolidone (NMP) to make an anode mixture slurry. This anode mixture slurry is uniformly coated on both surfaces of an aluminum (Al) foil that will become an anode current collector, vacuum-dried at 100°C for 24 hours, and thereafter compression-molded by a rolling device, thereby forming Anode active material layer.

[0105] manufacture cathode

[0106] A cathode mixture was prepared by uniformly mixing 91 wt% of artificial graphite and 9 wt% of powdery polyvinylidene fluoride, and the mixture was distributed into N-methyl-2-pyrrolidone (NMP) to manufacture a cathode mixture slurry. The cathode mixture slurry was uniformly coated on both surfaces of a copper (Cu) foil that will become a cathode current collector, and vacuum-dried at ...

example 2

[0112] After stacking the anode, cathode, and separator and fixing the stacked product, the stacked product was shaken by hand five times each in the lying position and the upright position, as shown in FIGS. 14A and 14B . A battery element was produced similarly to the case of Example 1 except that vibration was applied after stacking.

example 3

[0114] After stacking the first to thirteenth cathodes, the stacking device is held in the hand, and is raised and lowered during the stacking of the thirteenth to sixteenth cathodes. A battery element was produced similarly to the case of Example 1 except for the above operations. It should be noted that "during stacking" means the period during which the suction device picks up the electrodes and the separator and descends to their stacked position.

[0115] X-ray CT (computed tomography) was used to image each example of the battery element thus produced, the plane section indicated by P intersects the X axis along the side of one battery element, and the plane section indicated by Q along the The bottom of a cell element intersects the Z axis, as shown in Figure 15. It should be noted that, in each of the sides and the bottom, planar sections were taken at a position 15 mm from one of the corners of the bottom, and these planar sections were to be observed.

[0116] In t...

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Abstract

The invention provides a pile non-aqueous electrolyte battery, method for producing the battery and pile equipment of the battery. The pile non-aqueous electrolyte battery comprises multiple alternate pile electrode body, each of which comprises an anode and cathode overlapped through a partition. The partition has an edge part upraising along the edge part of one of the anode and cathode. The upraising edge parts of multiple partitions are overlapped with each other.

Description

technical field [0001] The present invention relates to a stacked non-aqueous electrolyte battery, a manufacturing method thereof, and a stacking device. In particular, the present invention relates to a stacked nonaqueous electrolyte battery whose battery quality and performance are improved by preventing the electrodes from shifting from their proper positions when stacking the electrodes, a method of manufacturing the same, and a stacking device therefor. Background technique [0002] As electronic devices, such as mobile phones and notebook personal computers, are further inclined toward cordless and portable development in recent years, portable electronic devices with reduced thickness, size and weight have been successively developed. Furthermore, their power consumption is increasing due to diversification of types and functions, and this requires batteries with higher capacity and lighter weight as their energy sources. Therefore, in order to meet this requirement,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M2/14H01M10/38H01M2/18H01M10/05H01M10/0585H01M10/0587
CPCH01M6/005H01M6/188H01M10/0404H01M10/0525H01M10/058H01M50/46Y02E60/10Y02P70/50Y10T29/49108
Inventor 古宫隆
Owner MURATA MFG CO LTD
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