TWI398027B - Lithium battery and method for making the same - Google Patents

Lithium battery and method for making the same Download PDF

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Publication number
TWI398027B
TWI398027B TW99111534A TW99111534A TWI398027B TW I398027 B TWI398027 B TW I398027B TW 99111534 A TW99111534 A TW 99111534A TW 99111534 A TW99111534 A TW 99111534A TW I398027 B TWI398027 B TW I398027B
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TW
Taiwan
Prior art keywords
negative electrode
hole
positive
ion battery
holes
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Application number
TW99111534A
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Chinese (zh)
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TW201136002A (en
Inventor
xiang-ming He
Jian-Jun Li
Jian Gao
wei-hua Pu
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Hon Hai Prec Ind Co Ltd
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Priority to TW99111534A priority Critical patent/TWI398027B/en
Publication of TW201136002A publication Critical patent/TW201136002A/en
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Publication of TWI398027B publication Critical patent/TWI398027B/en

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    • Y02E60/12

Description

Method for preparing lithium ion battery and lithium ion battery

The invention relates to a lithium ion battery and a preparation method of the lithium ion battery.

The conventional lithium ion battery can be classified into a wound type and a laminated type, and includes an outer casing, a positive electrode sheet encapsulated in the outer casing, a negative electrode sheet, a separator, and an electrolyte. The separator is disposed between the positive electrode tab and the negative electrode tab. The electrolyte sufficiently wets the positive electrode sheet, the negative electrode sheet, and the separator. The positive electrode sheet includes a positive electrode current collector and a positive electrode material layer formed on the surface of the positive electrode current collector. The negative electrode sheet includes a negative electrode current collector and a negative electrode material layer formed on a surface of the negative electrode current collector.

The stacked lithium ion battery may include positive and negative sheets that are stacked in a plurality of layers and spaced through the separator. In order to reduce the thickness of the lithium ion battery, the press-fitting between the positive and negative electrode sheets is relatively tight, which makes it difficult to inject the electrolyte between the positive and negative electrode sheets. The larger the area of the positive and negative electrode sheets, the more the number of layers is stacked, and the electrolyte solution is more difficult to inject. Therefore, in order to make the electrolyte permeable and fully wet to the middle of the positive and negative electrode sheets, it is usually necessary to leave the lithium ion battery after the electrolyte injection for a long time in the manufacturing process. This shortcoming is particularly evident in the manufacturing process of large power batteries. The power of the large battery after injection of the electrolyte often needs to be placed for more than ten hours or even longer, which greatly affects the production efficiency of the lithium ion battery. In addition, the tightly pressed positive and negative electrode sheets make it difficult for the gas generated inside the lithium ion battery to be discharged outward during charging and discharging, which affects the cycle performance of the lithium ion battery.

In view of this, it is indeed necessary to provide a method for preparing a lithium ion battery and a lithium ion battery which are easy to inject an electrolyte and which are easy to discharge during use.

A lithium ion battery comprising a stacked and spaced positive electrode sheet and a negative electrode sheet, the positive electrode sheet having at least one first through hole, the negative electrode sheet having at least one second through hole, the second through hole and the first through hole The hole position corresponds.

A lithium ion battery comprising a plurality of positive electrode sheets and a plurality of negative electrode sheets, the plurality of positive electrode sheets and the plurality of negative electrode sheets being alternately stacked and spaced apart, wherein each of the positive electrode sheets has a plurality of first through holes, each of The negative electrode sheets have a plurality of second through holes, each of the second through holes corresponding to one of the first through holes.

A method for preparing a lithium ion battery, comprising: providing a positive current collector and a negative current collector; respectively uniformly coating a positive electrode material layer and a negative electrode material layer on the positive current collector and the negative current collector surface to form a positive electrode sheet and a negative electrode sheet; Forming a corresponding through hole on the positive electrode sheet and the negative electrode sheet; and packaging the positive electrode sheet and the negative electrode sheet into an external package structure.

Compared with the prior art, the positive and negative electrodes of the lithium ion battery each have a through hole, so that the electrolyte easily enters from the through hole and penetrates into the middle of the positive and negative electrode sheets, and during the charging and discharging process, the lithium ion battery The internally generated gas is easily discharged from the through hole.

100‧‧‧Lithium-ion battery

102‧‧‧ positive film

104‧‧‧Negative film

106‧‧‧Separator

108‧‧‧External package structure

112‧‧‧ positive current collector

122‧‧‧positive material layer

114‧‧‧Negative current collector

124‧‧‧Negative material layer

130‧‧‧ Ears

132‧‧‧First through hole

134‧‧‧second through hole

1 is a schematic view showing the external structure of a lithium ion battery according to an embodiment of the present invention.

2 is a schematic view showing the internal structure of a lithium ion battery according to an embodiment of the present invention.

Figure 3 is a cross-sectional view taken along line III-III of Figure 2;

4 is a schematic view showing the cooperation of the through hole of the positive electrode tab and the through hole of the negative electrode tab.

The lithium ion battery and the method of manufacturing the same according to the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to FIG. 1 and FIG. 2 , an embodiment of the present invention provides a lithium ion battery 100 including a positive electrode sheet. 102. A negative electrode sheet 104, a separator 106, a non-aqueous electrolyte solution, and an outer package structure 108. The outer package structure 108 encloses the positive electrode sheet 102, the negative electrode sheet 104, the separator 106, and the non-aqueous electrolyte solution therebetween. The positive electrode sheet 102 and the negative electrode sheet 104 are stacked and separated from each other by the separator 106. The laminated positive electrode sheet 102, negative electrode sheet 104, and separator 106 are bonded to each other. It can be understood that although FIG. 1 only shows a structure in which a positive electrode sheet 102 and two negative electrode sheets 104 overlap, the lithium ion battery 100 may include a plurality of positive electrode sheets 102 and a plurality of negative electrode sheets 104 alternately stacked, each two adjacent There is a separator between the positive electrode sheet and the negative electrode sheet. The number of the positive and negative electrode sheets 102, 104 is not limited, and the positive and negative electrode sheets 102, 104 may be 1 to 100 layers or more, preferably 20 to 50 layers, respectively.

Referring to FIG. 3 , the positive electrode sheet 102 includes a sheet-shaped positive electrode current collector 112 and a positive electrode material layer 122 formed on a surface of the positive electrode current collector 112 opposite to the negative electrode current collector 114 . The negative electrode sheet 104 includes a sheet-shaped negative electrode current collector 114 and a negative electrode material layer 124 formed on a surface of the negative electrode current collector 114 opposite to the positive electrode current collector 112. Preferably, the positive electrode sheet 102 has two positive electrode material layers 122 respectively formed on two opposite surfaces of the positive electrode current collector 112, and the negative electrode sheet 104 has two negative electrode material layers 124 formed on the opposite surfaces of the negative electrode current collector 114, respectively. . After the positive electrode sheet 102 and the negative electrode sheet 104 are stacked, the positive electrode material layer 122 and the negative electrode material layer 124 are spaced apart from each other by the separator 106 and are placed in contact with the separator 106. The positive current collector 112 and the negative current collector 114 may also have a tab 130 extending outside the positive electrode material layer 122 and the negative electrode material layer 124, respectively. The tab 130 is for electrical connection to circuitry external to the lithium ion battery. When a plurality of positive electrode sheets 102 and a plurality of negative electrode sheets 104 are alternately stacked, the tabs of the plurality of positive electrode current collectors 112 overlap each other, the tabs of the plurality of negative electrode current collectors 114 overlap each other, and the positive electrode current collector 112 The tabs are disposed separately from the tabs of the negative current collector 114.

The positive electrode sheet 102 has at least one first through hole 132 having at least one second through hole 134 corresponding to the first through hole 132. The first through hole 132 and the second through hole 134 provide a flow passage for the electrolyte, so that the electrolyte on the surfaces of the positive and negative electrode sheets 102, 104 can flow into the positive and negative electricity. Between the pole pieces 102, 104. Preferably, the positive electrode sheet 102 and the negative electrode sheet 104 each have a plurality of first and second through holes 132, 134 which are substantially uniformly distributed on the positive and negative electrode sheets 102, 104. The first through holes 132 formed on the positive electrode tab 102 communicate the two opposite surfaces of the positive electrode tab 102, and the second through holes 134 formed in the negative electrode tab 104 allow the opposite surfaces of the negative electrode tab 104 to communicate. It can be understood that the number of the first and second through holes 132, 134 is related to the area of the positive and negative electrode sheets 102, 104. When the lithium ion battery is small, such as the side length of the positive and negative electrode sheets 102, 104 is less than or equal to 10 cm, A first through hole 132 is formed in the center of the positive electrode sheet 102, and a second through hole 134 corresponding to the position of the first through hole 132 is formed in the center of the negative electrode sheet 104.

Since the positive and negative electrode sheets 102, 104 have the first and second through holes 132, 134 as a whole, the positive electrode material layer 122, the positive electrode current collector 112, the negative electrode material layer 124, and the negative electrode current collector 114 also have through holes, and the positive electrode material layer 122 The via is aligned with the via edge of the positive current collector 112, and the via of the negative material layer 124 is aligned with the via edge of the negative current collector 114. The second through holes 134 on each of the negative electrode sheets 104 correspond to the first through holes 132 on one of the positive electrode sheets 102. That is, the number of the first through holes 132 on the positive electrode sheet 102 may be greater than the number of the second through holes 134 of the negative electrode sheet 104. Preferably, the first through hole 132 and the second through hole 134 are equal in number. When the positive and negative electrode sheets 102, 104 are stacked, the axes of the mutually corresponding first and second through holes 132, 134 of the positive and negative electrode sheets 102, 104 are substantially aligned. However, the positive and negative electrode sheets 102, 104 are first formed with the first and second through holes 132, 134, respectively, and then assembled with the diaphragm 106. Therefore, the diaphragm 106 disposed between the positive and negative electrode sheets 102, 104 is a The complete structure does not have first and second through holes 132, 134 similar to the positive and negative tabs 102, 104, thereby preventing short circuits between the positive and negative tabs 102, 104.

The first and second through holes 132, 134 of the positive and negative electrode sheets 102, 104 are not limited in shape, and may be circular holes, square spaces, rhombic holes, triangular holes, polygonal holes or a combination thereof. The first and second through holes 132, 134 corresponding to the positive and negative electrode sheets 102, 104 may have a uniform shape, for example, when the positive electrode sheet When the first through hole 132 on the 102 is a circular hole, the second through hole 134 of the negative electrode tab 104 corresponding to the first through hole 132 is also a circular hole. Each of the first and second through holes 132, 134 has an area of about 0.001 square millimeter to 13 square millimeters, and each of the first and second through holes 132, 134 has a side length or diameter of about 50 micrometers to 4 millimeters. Preferably, the first and second through holes 132, 134 are circular holes having a diameter of 1 mm to 2 mm. The spacing between the axes of the two adjacent first and second through holes 132, 134 on the same positive and negative electrode sheets 102, 104 is from 1 cm to 50 cm, preferably 5 cm. The plurality of first and second through holes 132, 134 may be arranged in an array in rows and columns, or may be arranged in a divergent manner centered on the centers of the positive and negative electrodes 102, 104. The opening ratio of the positive and negative electrode sheets 102, 104 is preferably 10% or less, more preferably less than 2%, such as 1% to 1%. The smaller opening ratio ensures that the surfaces of the positive and negative current collectors 112, 114 can carry more active substances to avoid affecting the battery capacity; on the other hand, the positive and negative electrode current collectors 112, 114 can be ensured to have sufficient strength without being squeezed. Press and break.

Referring to FIG. 4 , the first through hole 132 of the positive electrode tab 102 may have a size greater than or equal to the size of the second through hole 134 of the negative electrode tab 104 . When the through holes 132, 134 are circular holes, the diameter of the first through holes 132 is greater than or equal to the diameter of the second through holes 134. When the through holes 132, 134 are rectangular holes, the side length of the first through holes 132 is greater than or equal to the side length of the second through holes 134. Preferably, the size of the through hole 132 of the positive electrode sheet 102 is larger than the second through hole 134 of the negative electrode sheet 104, thereby leaving a margin for the position of the second through hole 134 of the negative electrode sheet 104, which is easy to assemble. When the positions of the first and second through holes 132, 134 of the positive and negative electrode sheets 102, 104 are slightly offset rather than precisely aligned, the first through hole 132 of the positive electrode sheet 102 is surrounded in a direction perpendicular to the positive and negative electrode sheets 102, 104. The second through hole 134 of the negative electrode tab 104 is such that the second through hole 134 of the negative electrode tab 104 is located within the range of the first through hole 132 of the positive electrode tab 102, so that the positive electrode material layer 122 of the entire positive electrode tab 102 corresponds to the negative electrode. The negative material layer 124 of the sheet 104. Since the positive electrode material layer 122 contains lithium, this arrangement is such that from the positive electrode sheet 102 to the negative electrode sheet 104, since the negative electrode material layer 124 always corresponds to the positive electrode material layer 122, lithium ions are prevented from being directly precipitated as metallic lithium. To improve the safety of the battery. Preferably, the side length or diameter of the first through hole 132 of the positive electrode sheet 102 is the side length of the second through hole 134 of the negative electrode sheet 104 or 1.5 to 2 times the diameter. In this embodiment, the side length or diameter of the first through hole 132 of the positive electrode sheet 102 is 2 mm, and the side length or diameter of the second through hole 134 of the negative electrode sheet 104 is 1 mm. When the lithium ion battery 100 includes a plurality of positive electrode sheets 102 and a plurality of negative electrode sheets 104 overlapping each other, the axes of the first and second through holes 132, 134 of the plurality of positive and negative electrode sheets 102, 104 are substantially aligned with each other, or At least the second through hole 134 of the negative electrode tab 104 can be located within the range of the first through hole 132 of the positive electrode tab 102.

The positive and negative current collectors 112, 114 are metal foils, the positive current collector 112 may be aluminum foil or titanium foil, and the negative current collector 114 may be copper foil or nickel foil. The positive and negative current collectors 112, 114 have a thickness of from 1 micrometer to 200 micrometers. The positive electrode material layer 122 includes a positively-active positive electrode active material, a conductive agent, and a binder. The negative electrode material layer 124 includes a negatively mixed negative electrode active material, a conductive agent, and a binder. The positive electrode active material may be lithium manganate, lithium cobaltate, lithium nickelate or lithium iron phosphate, etc., and the negative electrode active material may be natural graphite, organic cracked carbon or mesocarbon microbeads (MCMB), etc., the conductive agent may The acetylene black or carbon fiber or the like may be polyvinylidene fluoride (PVDF) or polytetrafluoroethylene (PTFE). It is to be understood that the positive electrode active material, the negative electrode active material, the conductive agent, and the binder may be other commonly used materials. The positive electrode sheet 102 has an overall thickness of from about 100 micrometers to about 300 micrometers, preferably 200 micrometers. The negative electrode sheet 104 has an overall thickness of from about 50 micrometers to about 200 micrometers, preferably 100 micrometers.

The separator 106 may be a polypropylene microporous membrane, and the electrolyte salt in the electrolyte may be lithium hexafluorophosphate, lithium tetrafluoroborate or lithium bis(oxalate)borate, and the organic solvent in the electrolyte may be ethylene carbonate. Diethyl carbonate or dimethyl carbonate, and the like. It will be appreciated that other common materials may be employed for the membrane 106 and electrolyte. In addition, the electrolyte may be replaced by a solid electrolyte membrane or an ionic liquid. When the lithium ion battery has a solid electrolyte membrane, the solid electrolyte membrane further replaces the separator 106 and is disposed on the cathode material layer 122 and the anode material layer. Between 124.

The outer package structure 108 can be a hard battery case or a soft package bag. The 130 is exposed to the The outer package structure 108 is external to the electrical connection to the external circuit.

The preparation method of the lithium ion battery of the embodiment of the invention mainly comprises the following steps: step one, providing a positive current collector 112 and a negative current collector 114; and step two, uniformly coating the surface of the positive current collector 112 and the negative current collector 114 respectively. The positive electrode material layer 122 and the negative electrode material layer 124 form the positive electrode sheet 102 and the negative electrode sheet 104; in step 3, the first and second through holes 132, 134 corresponding to the positions are formed on the positive electrode sheet 102 and the negative electrode sheet 104; and the fourth step is performed on the positive electrode sheet and the negative electrode sheet 104. The wafer 102 and the negative electrode 104 are packaged into an external package structure 108.

In the above step two, the positive and negative current collectors 112, 114 may be coated by a film coater. Specifically, the positive electrode active material and the negative electrode active material are respectively mixed with a conductive agent and a binder solution to form a positive electrode slurry and a negative electrode slurry, and the positive and negative electrode pastes are respectively applied to the positive and negative electrode sets by a coater. The surfaces of the fluids 112, 114 are dried and form layers 122, 124 of positive and negative materials. Further, the coated positive and negative material layers 122, 124 can be compacted by a laminator.

In the above step three, the method of forming the first and second through holes 132, 134 may be by a stamping method or a laser etching method. The first and second through holes 132, 134 having a smaller size can be formed by a laser etching method. The first and second through holes 132, 134 are formed after forming the positive and negative material layers 122, 124, thereby avoiding leakage or sticking of the slurry generated when the positive and negative current collectors 112, 114 are separately opened and then coated. The first and second through holes 132, 134 are blocked. The first and second through holes 132, 134 are formed at positions corresponding to the positive and negative electrode sheets 102, 104. Specifically, the positive and negative electrode sheets 102, 104 of equal size can be fixed by the positioning device and punched at the same position.

When the lithium ion battery uses an electrolyte or an ionic liquid, the above step 4 may further include: (1) Providing a separator 106, the positive electrode sheet 102 and the negative electrode sheet 104 are respectively disposed on both sides of the separator 106 and pressed; and (2) passing through the first and second through holes 132, 134 toward the positive electrode sheet 102 and the negative electrode sheet The electrolyte is injected into the 104, and the positive electrode sheet 102, the negative electrode sheet 104, the separator 106, and the electrolyte are encapsulated in the outer package structure 108.

In the above step (1), the separator 106 may be first laid on the surface of the positive electrode sheet 102, and then the negative electrode sheet 104 may be overlaid on the separator 106. During the assembly process, the positive electrode sheet 102 should be passed through the positioning device. The upper first through hole 132 is aligned with the second through hole 134 on the negative electrode tab 104 as much as possible. When the lithium ion battery includes a plurality of positive electrode sheets 102 and a plurality of negative electrode sheets 104, the positive electrode sheets 102, the separators 106, and the negative electrode sheets 104 may be sequentially laminated a plurality of times to form a multilayer structure. The laminated positive and negative electrode sheets 102, 104 and the separator 106 can be pressed against each other by a laminator.

In the above step (2), the electrolyte is injected between the positive and negative electrode sheets 102, 104 through the through holes. Since the positive and negative electrode sheets 102, 104 have first and second through holes 132, 134, the electrolyte can quickly flow between the positive and negative electrode sheets 102, 104 through the first and second through holes 132, 134, and rapidly infiltrate the entire positive electrode sheet 102. The negative electrode sheet 104 and the separator 106 improve the production efficiency of the lithium ion battery. The larger the area of the positive and negative electrode sheets 102, 104, especially in a large power battery, the more effective the effect of injecting the electrolyte from the through holes. Preferably, the positive and negative electrode sheets 102, 104 may have an area greater than 400 square centimeters. When the positive and negative electrode sheets 102, 104 are rectangular, the side lengths of the positive and negative electrode sheets 102, 104 may be greater than 20 cm, preferably 50 cm to 100 cm.

When the lithium ion battery 100 employs a solid electrolyte, a solid electrolyte membrane may be directly disposed between the positive and negative electrode sheets 102, 104 instead of the separator 106.

When the lithium ion battery is in use, since the positive and negative electrode sheets 102, 104 have first and second through holes 132, 134, the electrolyte or other substances between the positive and negative electrode sheets 102, 104 are decomposed. The gas can be easily discharged.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧Lithium-ion battery

130‧‧‧ Ears

132‧‧‧First through hole

134‧‧‧second through hole

Claims (19)

  1. A lithium ion battery comprising a positive electrode sheet and a negative electrode sheet laminated and spaced apart, wherein the positive electrode sheet has at least one first through hole, and the negative electrode sheet has at least one second through hole, the at least one second pass The hole corresponds to the position of the at least one first through hole, and the positive electrode sheet and the negative electrode sheet have an opening ratio of 10% or less.
  2. The lithium ion battery according to claim 1, wherein the positive electrode sheet has a plurality of first through holes, and the negative electrode sheet has a plurality of second through holes, each of the second through holes and each of the second through holes The first through holes correspond one by one.
  3. The lithium ion battery of claim 1, wherein the mutually corresponding first through holes are substantially aligned with the axis of the second through holes.
  4. The lithium ion battery of claim 1, wherein the first through hole and the second through hole have the same shape.
  5. The lithium ion battery of claim 1, wherein an area of the first through hole is larger than an area of the second through hole.
  6. The lithium ion battery according to claim 1, wherein the mutually corresponding second through holes are located in a range of the first through holes in a direction perpendicular to the positive and negative plates.
  7. The lithium ion battery according to claim 1, wherein the shape of the first through hole and the second through hole comprises a circular hole, a square hole, a diamond hole, a triangular hole, a polygonal hole or a combination thereof.
  8. The lithium ion battery according to claim 1, wherein each of the first through hole and the second through hole has an area of 0.001 mm 2 to 13 mm 2 .
  9. The lithium ion battery according to claim 2, wherein a distance between axes of the adjacent two first through holes and the adjacent two second through holes is 1 cm to 50 cm.
  10. The lithium ion battery of claim 2, wherein the first through hole is a circle having a diameter of 2 mm The second through hole is a circular hole having a diameter of 1 mm, and the first through hole is aligned with the second through hole.
  11. The lithium ion battery according to claim 10, wherein the spacing between the axes of the adjacent two first through holes and the adjacent two second through holes is 5 cm.
  12. The lithium ion battery of claim 1, wherein the positive electrode sheet comprises a positive current collector and a positive electrode material layer disposed on the surface of the positive current collector, the negative electrode plate includes a negative current collector and is disposed on the negative electrode set A layer of negative electrode material on the surface of the fluid.
  13. The lithium ion battery according to claim 12, wherein the cathode current collector is an aluminum foil or a titanium foil, and the anode current collector is a copper foil or a nickel foil.
  14. The lithium ion battery according to claim 1, further comprising a separator that partitions the positive electrode sheet from the negative electrode sheet.
  15. The lithium ion battery according to claim 14, wherein the electrolyte further comprises an electrolyte and an outer package structure, and the positive electrode sheet, the negative electrode sheet, the electrolyte, and the separator are encapsulated in the outer package structure.
  16. The lithium ion battery according to claim 1, further comprising a solid electrolyte that partitions the positive electrode sheet from the negative electrode sheet.
  17. A lithium ion battery comprising a plurality of positive electrode sheets and a plurality of negative electrode sheets, the plurality of positive electrode sheets and the plurality of negative electrode sheets being alternately stacked and spaced apart, wherein the positive electrode sheets each have a plurality of first through holes, Each of the negative electrode sheets has a plurality of second through holes, each of the second through holes corresponding to a first through hole, and the positive electrode sheet and the negative electrode sheet have an opening ratio of 10% or less.
  18. A method for preparing a lithium ion battery, comprising: providing a positive current collector and a negative current collector; respectively uniformly coating a positive electrode material layer and a negative electrode material layer on the positive current collector and the negative current collector surface to form a positive electrode sheet and a negative electrode sheet; a through hole corresponding to a position on the positive electrode sheet and the negative electrode sheet; The positive and negative electrodes are packaged into an external package structure.
  19. The method for preparing a lithium ion battery according to claim 18, wherein the step of packaging the positive electrode tab and the negative electrode tab into an external package structure further comprises: providing a separator, and disposing the positive electrode tab and the negative electrode tab separately The separator is pressed on both sides; and an electrolyte is injected between the positive electrode tab and the negative electrode tab through the through hole, and the positive electrode tab, the negative electrode tab, the separator, and the electrolyte are encapsulated in the outer package structure.
TW99111534A 2010-04-14 2010-04-14 Lithium battery and method for making the same TWI398027B (en)

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Publication number Priority date Publication date Assignee Title
CN102664241A (en) * 2011-12-27 2012-09-12 东莞新能德科技有限公司 Lithium ion battery and preparation method thereof

Citations (9)

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TW554561B (en) * 1999-01-20 2003-09-21 Lg Chemical Ltd Device for sealing lithium secondary battery electrolyte injecting hole
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TWI241731B (en) * 2001-12-12 2005-10-11 Da-Ching Peng Modularized metal-air battery and method for manufacturing the same
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW554561B (en) * 1999-01-20 2003-09-21 Lg Chemical Ltd Device for sealing lithium secondary battery electrolyte injecting hole
TW517405B (en) * 2000-03-31 2003-01-11 Sanyo Electric Co Nonaqueous electrolyte secondary cell and method of producing the same
TW480764B (en) * 2001-02-15 2002-03-21 Haimecha Kk Manufacturing method of mobile phone lithium battery
TWI241731B (en) * 2001-12-12 2005-10-11 Da-Ching Peng Modularized metal-air battery and method for manufacturing the same
US20040115521A1 (en) * 2002-09-11 2004-06-17 Samsung Sdi Co., Ltd. Secondary battery including improved cap assembly and plug for the secondary battery
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US20060257733A1 (en) * 2005-05-16 2006-11-16 Yong-Sam Kim Rechargeable battery
TWM347691U (en) * 2008-06-20 2008-12-21 Sunyen Co Ltd Pressed type lithium battery

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