Winding battery

A battery and electrode technology, applied in secondary batteries, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve the problems of high productivity, unavailability, and difficulty in practical application, and achieve high productivity and shorten the effect of pre-doping time.

A battery and electrode technology, applied in secondary batteries, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve the problems of high productivity, unavailability, and difficulty in practical application, and achieve high productivity and shorten the effect of pre-doping time.

CN102301439AActive Publication Date: 2011-12-28MUSASHI ENERGY SOLUTIONS CO LTD
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0140] figure 1 It is an explanatory sectional view schematically showing the configuration of the wound LIC according to the first embodiment of the present invention. figure 2 is schematically shown figure 1 A cross-sectional view for explaining a state of a cross-section of an electrode laminate in a wound state of the wound electrode unit of the wound-type LIC.

[0141] The winding type LIC of this example has a cylindrical electrode winding unit 10, and the cylindrical electrode winding unit 10 is configured as follows: a strip-shaped positive electrode 11 having a positive electrode gap portion 11S and a strip-shaped positive electrode 11 having a negative electrode gap portion 12S. The negative electrode 12 is laminated with the separator interposed therebetween, specifically, the negative electrode 12, the separator 13A, and the positive electrode 11 are sequentially laminated on the separator 13B to form an electrode laminate 10A, and the electrode laminate 10A is w...

no. 2 approach

[0253] Such as Figure 16 and Figure 17 As shown, in the wound-type LIC of the second embodiment, the electrode winding unit 50 is a cylindrical member, and is configured as follows: a strip-shaped positive electrode 51 having a positive electrode gap 51S and a strip-shaped negative electrode 52 having a negative electrode gap 52S. The electrode laminate 50A is formed by laminating, specifically, the negative electrode 52 , the separator 53A, and the positive electrode 51 are sequentially laminated on the separator 53B, and the electrode laminate 50A is wound from one end thereof to form a wound electrode. The unit 50 has the same structure as that of the first embodiment except for this. In addition, in Figure 16 and Figure 17 In , the same reference numerals as those of the first embodiment denote the same components.

[0254] In wound electrode unit 50 in which positive electrode 51 , negative electrode 52 , and lithium ion supply sources 16A to 16C are laminated and w...

no. 3 approach

[0266] Figure 20 It is an explanatory cross-sectional view schematically showing the structure of a wound-type LIC according to a third embodiment of the present invention.

[0267] In this wound type LIC, an electrode wound unit 10 is provided in a packaging container 20 . Such as Figure 21 As shown, the electrode winding unit 10 sequentially stacks the negative electrode 12, the second separator 14B, and the positive electrode 11 on one side of the first separator 14A to form an electrode laminate 10A, and the electrode laminate 10A is wound in a cylindrical shape from one end thereof. The electrode winding unit 10 is formed by winding around the mandrel 19 . Here, electrode layers of the positive electrode 11 and the negative electrode 12 , which will be described later, are arranged to face each other with the second separator 14B interposed therebetween. In the illustrated example, the electrode laminate 10A is wound with the first separator 14A on the inside, whereb...

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Abstract

A wound-type accumulator which is simplified in the layout of lithium ion sources and shortened in time spent on injecting a nonprotonic organic solvent electrolytic solution and on predoping, so as to allow quick completion of assembly and obtain high productivity. The wound-type accumulator is provided with: a cylindrical wound electrode unit which has cathode and anode strips and is configured by winding from one end an electrode stack comprised of a stack of the cathode and anode with a separator disposed therebetween; and an electrolytic solution. In this wound-type accumulator, the cathode and / or anode is doped with lithium ions and / or anions by means of electrochemical contact of the cathode and / or anode with a lithium ion source. At the cathode, a cathode gap section is formed, and at least one lithium ion source is arranged at the cathode gap section or at a position opposing the cathode gap section at the anode, in a state not contacting the cathode.

Description

technical field [0001] The present invention relates to a wound storage battery having a wound electrode unit configured by stacking and winding a positive electrode and a negative electrode with a separator interposed therebetween. Background technique [0002] In recent years, negative electrodes made of carbon materials such as graphite and LiCoO 2 A battery with a positive electrode composed of a lithium metal oxide. This battery is a so-called rocking chair battery, and when the battery is charged after assembly, lithium ions are supplied from the lithium-containing metal oxide constituting the positive electrode to the negative electrode, and lithium ions are returned from the negative electrode to the positive electrode during discharge. Metal lithium is used and only lithium ions participate in charging and discharging, so it is called a lithium-ion secondary battery, which is different from a lithium battery using lithium metal. This lithium ion secondary battery ...

Claims

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Application Information

Patent Timeline
28 Dec 2011
Publication
CN102301439A
IPC
H01G9/058; H01G9/016; H01G9/155; H01M4/70; H01M10/0525; H01M10/0569; H01M10/0587
CPC
H01G9/155; H01M4/133; H01M4/13; H01G9/058; Y02E60/122; H01M10/0587; H01M2/1673; Y02E60/13
Inventors
田口真; 渡边裕