JP3220109U - Conductive current collector for battery - Google Patents

Abstract

The present invention provides a conductive collector for a battery that increases the structural strength of the electrode itself, prevents electrode breakage when the electrode is bent, and relatively improves the life of the electrode. An outer edge portion having a plurality of outer edge sheets 111 and 112 connected to each other to form an annular sheet 113, and formed on the outer edge portion, each being positioned inside the annular sheet and obliquely with respect to the outer edge sheet A plurality of reinforcing sheets 121 having a plurality of reinforcing sheets 121a, a plurality of mesh portions 13 formed between the outer edge portion and the reinforcing portion, each of which is a first region 131 positioned on the periphery of the mesh portion; And a second region 132 located on one side of the first region, and the first region has a plurality of first through holes 133 arranged at intervals of the first distance S1. A plurality of meshes that are distributed and a plurality of second through-holes 134 are distributed in the second region at intervals of a second distance S2 that is shorter than the first distance. A section. [Selection] Figure 3

Description

  The present invention relates to a conductive electrode as a battery electrode, and more particularly to a conductive collector for a battery capable of improving the structural strength. Further, when the electrode material is applied to the battery conductive current collector and bent, the battery conductive current collector can be prevented from being broken or damaged.

  A battery is a device that can convert the chemical energy stored in itself into electrical energy, and further provides the electrical energy to facilities that require electrical energy to operate the facility in response to the electrical energy. It can be made to. With the remarkable progress of science and technology, battery products have evolved from early lead-acid batteries, nickel cadmium batteries and nickel metal hydride batteries to current lithium batteries.

  Especially, the present general lithium battery has a hollow case and a roll-shaped structure located inside the hollow case. Especially, a roll-shaped structure has a positive electrode, a negative electrode, a separator, and electrolyte solution. The positive electrode and the negative electrode are all bent to form a roll. The positive electrode and the negative electrode are respectively positioned on opposite sides of the separator, so that the separator is positioned between the positive electrode and the negative electrode, and both outer surfaces thereof are in contact with the electrolyte. Thus, the positive electrode and the negative electrode can generate an electric energy by performing an oxidation-reduction reaction.

In order to improve the electric energy generation efficiency of a lithium battery, a manufacturer conventionally forms a plurality of through holes in the positive electrode current collector and the negative electrode current collector of the positive electrode, and uses the positive electrode current collector and the negative electrode as electrode materials. It applied to the electrical power collector and each of the said through-hole was satisfy | filled with a part of said electrode material. The positive electrode current collector and the negative electrode current collector have an increased area in contact with the electrode material, and the adhesiveness of the electrode material bonded to the positive electrode current collector and the negative electrode current collector can be relatively improved. The charge / discharge capacity between the positive electrode current collector or the negative electrode current collector and the electrode material is improved.
However, since the plurality of through holes are provided in either the positive electrode current collector or the negative electrode current collector, the structural strength of the two is relatively reduced. Furthermore, when the positive electrode and the negative electrode are bent to change the shape, the positive electrode and the negative electrode may be easily cut off, so that the life of the lithium battery is shortened.

  The main purpose of the present invention is to improve the structure of the electrode itself, to increase the structural strength of the electrode itself, to prevent the electrode from being broken when the electrode is bent, and to relatively improve the life of the electrode. .

  The present invention for realizing the above object relates to a conductive current collector for a battery including an outer edge portion, a reinforcing portion, and a plurality of mesh portions. The outer edge portion has a plurality of outer edge sheets. The plurality of outer edge sheets are connected to each other to form an annular sheet. The reinforcing portion includes a plurality of reinforcing sheets formed on the outer edge portion and positioned inside the annular sheet. Each of the reinforcing sheets is inclined with respect to the outer edge sheet. Further, the plurality of mesh portions are formed between the outer edge portion and the reinforcing portion, and each of the first region is located on the periphery of the mesh portion, and the first region is located on one side of the first region. A plurality of first through holes arranged at intervals in the first region and the second region, and a plurality of second through holes arranged at intervals. And the first distance is formed by the pitch between the two first through holes, and the length is longer than the first distance by the pitch between the two second through holes. A short second distance is formed.

  In one preferred embodiment, all the reinforcing sheets are inclined in the same direction with respect to the outer edge sheet, the plurality of reinforcing sheets are arranged at intervals, and the first region and the first region Each of the two regions is located on opposite sides of the mesh portion, one of the first region and the second region is adjacent to the outer edge portion, and the other is adjacent to the reinforcing portion.

  In another preferred embodiment, a part of the reinforcing sheets is inclined along the first direction as the first reinforcing sheet, and the other part of the reinforcing sheets has a direction different from the first direction. The second reinforcing sheet is inclined along the direction 2. In this embodiment, an end portion of each of the first reinforcing sheets is connected to one of the second reinforcing sheets, so that the first reinforcing sheet and the second reinforcing sheet are interposed. An angle is formed. Furthermore, the single first reinforcing sheet and the single second reinforcing sheet together form a V-shaped appearance, and the first reinforcing sheet is one of the second reinforcing sheets. By intersecting with each other, the single first reinforcing sheet and the single second reinforcing sheet together form an X-shaped appearance.

  The first region surrounds the outer edge of the second region, so that the second region is located inside the first region, and the first region alone serves as the reinforcing portion. It can be adjacent or simultaneously adjacent to the outer edge and the reinforcement.

  In the two embodiments, the battery conductive current collector is rectangular in appearance, two long sides arranged at intervals on the outer peripheral edge, and two short sides perpendicular to the long side. A side is provided, and the length of the reinforcing sheet is between the long side and the short side. In particular, a through-hole surface is formed by combining end surfaces of the plurality of first through-holes and end surfaces of the plurality of second through-holes, and the through-hole surface is a surface of the battery current collector. 40% or more.

  Furthermore, the mesh part further includes a third region located on one side of the first region. A plurality of third through holes arranged at intervals are distributed in the third region, and the length is longer than the first distance at the pitch between the two third through holes. A third distance is formed.

  In the present invention, all of the reinforcing sheets of the reinforcing portion are inclined with respect to the outer edge sheet of the outer edge portion, and each of the reinforcing sheets is neither perpendicular nor parallel to the outer edge sheet. As a result, the number of through holes located at the periphery of the mesh portion is further reduced, the distance between the through holes and the through holes is relatively increased, and the battery current collector itself according to the present invention By further strengthening the structural strength, it is possible to prevent electrode breakage when the battery current collector is bent, and the life of the battery current collector can be relatively improved.

It is a schematic diagram by which the electrically conductive collector for batteries which concerns on this invention is used for a battery. It is a schematic diagram in the 1st preferable embodiment of the electrically conductive collector for batteries which concerns on this invention. It is a schematic diagram in which each of a 1st area | region and a 2nd area | region is located in the both sides which a mesh part opposes. It is a schematic diagram by which the electrically conductive collector for batteries which concerns on this invention is bend | folded. It is a schematic diagram in the 2nd preferable embodiment of the electrically conductive collector for batteries which concerns on this invention. It is a schematic diagram in the 3rd preferable embodiment of the electrically conductive collector for batteries which concerns on this invention. It is a schematic diagram in the 4th preferable embodiment of the electrically conductive collector for batteries which concerns on this invention.

  In order that the structure, application, and features of the present invention will be more clearly and reliably understood, preferred embodiments will be described in detail below with reference to the drawings.

Please refer to FIG. 1 and FIG. A battery current collector 1 according to the present invention is mainly used for a battery structure 2. The battery structure 2 has a hollow case 20 having a columnar appearance, and has a positive electrode 21, a negative electrode 22, a separator 23, and an electrolyte solution 24 inside the hollow case 20.
As shown in FIG. 1, the positive electrode 21 is positioned outside the separator 23, and the negative electrode 22 is positioned inside the separator 23, so that the positive electrode 21 and the negative electrode 22 are positioned on opposite sides of the separator 23. . As shown in the drawing, the positive electrode 21 and the negative electrode 22 are all curled. Especially, when the electrolyte solution 24 contacts the three outer surfaces of the positive electrode 21, the negative electrode 22, and the separator 23, the positive electrode 21 and the negative electrode 22 can perform an oxidation-reduction reaction and generate electric energy. In this embodiment, the battery structure 2 may be a lithium battery, a fuel cell, or a commercially available normal battery type.
The positive electrode 21 has a positive electrode current collector (not shown) and a positive electrode material (not shown) applied to the positive electrode current collector, and the negative electrode 22 has a negative electrode current collector (not shown). A negative electrode material (not shown) applied to the negative electrode current collector, and the battery conductive current collector 1 according to the present invention is a positive electrode current collector of the positive electrode 21 or a negative electrode current collector of the negative electrode 22. Also good.

Please refer to FIG. In the first preferred embodiment, the battery current collector 1 has a conductive thin plate 10 made of a conductive material (copper, aluminum, silver, zinc). The conductive thin plate 10 mainly includes an outer edge portion 11, a reinforcing portion 12, and a plurality of mesh portions 13.
The outer edge portion 11 has two first outer edge sheets 111 having an outer appearance and two second outer edge sheets 112 having an outer appearance. The first outer edge sheet 111 is longer in length than the second outer edge sheet 112, is perpendicular to the second outer edge sheet 112, and opposite ends of each first outer edge sheet 111 have a one-to-one relationship. The second outer edge sheet 112 is integrally molded. As a result, the two first outer edge sheets 111 and the two second outer edge sheets are connected to each other to form an annular sheet 113 having a rectangular appearance, and the annular sheet 113 serves as the reinforcing portion 12. And each mesh part 13 is surrounded. As shown in the drawing, since the outer appearance of the annular sheet 113 has a rectangular shape, the outer appearance of the entire conductive thin plate 10 also has a rectangular shape. There are two long sides 101 arranged at intervals and two short sides 102 arranged at intervals, and the two long sides 101 are all perpendicular to each of the short sides 102.

  The reinforcing portion 12 is integrally formed with the outer edge portion 11 and has a plurality of reinforcing sheets 121. Each of the reinforcing sheets 121 is located inside the annular sheet 113 and both ends thereof are connected to the annular sheet 113. Each of the reinforcing sheets 121 is slanted with respect to the first outer edge sheet 111 and the second outer edge sheet 112, so that each of the reinforcing sheets 121 may be perpendicular or parallel to the first outer edge sheet 111 and the second outer edge sheet 112. Absent. In this embodiment, a plurality of reinforcing sheets 121 are arranged with a space therebetween, and each of the reinforcing sheets 121 is oblique with respect to the first outer edge sheet 111 and the second outer edge sheet 112 in the first direction D1. Thus, the first reinforcing sheet 121a is obtained. In this embodiment, the length of the first reinforcing sheet 121 a is between the long side 101 of the conductive thin plate 10 and the short side 102 of the conductive thin plate 10.

  As shown in the figure, each mesh portion 13 is formed between the outer edge portion 11 and the reinforcing portion 12, and a first region 131 located at the periphery of the mesh portion 13 is formed in a partial region of each mesh portion 13, A second region 132 located on one side of the first region 131 is formed in the remaining region. In this embodiment, the first region 131 of each mesh portion 13 surrounds the outer edge of the second region 132, so that the second regions 132 of each mesh portion 13 are all located inside the first region 131. In addition, the first region 131 of each mesh portion 13 is simultaneously adjacent to the outer edge portion 11 and the reinforcing portion 12, and the second region 132 is arranged at an interval from the outer edge portion 11 and the reinforcing portion 12.

The configuration in which all the first regions 131 of the mesh part 13 surround the second region 132 of the mesh part 13 is merely for convenience of explanation. As shown in FIG. 3, one mesh portion 13 is divided into two parts to form a first region 131 and a second region 132, so that the first region 131 and the second region 132 are formed. Are located on opposite sides of the mesh portion 13, and the first region 131 alone is adjacent to the reinforcing portion 12, and the second region 132 is alone adjacent to the outer edge portion 11.
Further, the reason why the first region 131 and the second region 132 are adjacent to the reinforcing portion 12 and the outer edge portion 11 is merely because it is easy to explain in the form depicted in FIG. That is, the first region 131 and the second region 132 are arranged so that the first region 131 can be made adjacent to the outer edge portion 11 alone, and the second region 132 can be made adjacent to the reinforcing portion 12 alone. The arrangement method may be changed.

As shown in FIG. 2, a plurality of first through holes 133 are distributed in the first region 131 of each mesh portion 13, and a plurality of second holes 132 are disposed in the second region 132 of each mesh portion 13. The through holes 134 are distributed and installed. As shown in the drawing, the plurality of first through holes 133 are arranged with a space between each other, so that the first first through hole 133 and the other first through hole 133 have a first pitch. Distance S1 is formed. It should be noted that the plurality of second through holes 134 are arranged at intervals so that the distance between one second through hole 134 and the other second through hole 134 can be increased. A second distance S2 that is smaller than the first distance S1 is formed.
In this embodiment, the plurality of first through holes 133 and the plurality of second through holes 134 are all crossed and arranged at intervals, so that the outer peripheral side of each mesh portion 13 is all conductive thin plate. 10 long sides 101 and the short sides 102 of the conductive thin plate 10 are inclined, and the end surfaces of the plurality of first through holes 133 and the end surfaces of the plurality of second through holes 134 are combined to form a through hole surface 135. The through-hole surface 135 occupies 40% or more of the surface of the conductive thin plate 10. However, the through hole surface 135 occupies 40% or more of the surface of the conductive thin plate 10 is only for convenience of explanation. That is, the through-hole surface 135 may occupy 50% or 60% or more of the surface of the conductive thin plate 10.

  As shown in the drawing, the shape and size of each first through-hole 133 are all the same and form a circular hole, and the shape and size of each second through-hole 134 are all the first through-hole. By being the same as 133, the diameters of the first through hole 133 and the second through hole 134 are all the same. In this embodiment, the hole diameter of the first through hole 133 and the second through hole 134 is 39.86 um. However, the diameters of the first through hole 133 and the second through hole 134 are all the same for the convenience of explanation. That is, the diameter of the first through hole 133 or the second through hole 134 is large so that the hole diameter of the first through hole 133 can be larger or smaller than the hole diameter of the second through hole 134. May be changed.

  Please refer to FIG. The conductive thin plate 10 is bent to form a curl shape. In the process in which the conductive thin plate is bent, the separation distance between each of the reinforcing sheets 121 of the reinforcing portion 12 and the two first through holes 133 can effectively prevent the conductive thin plate 10 from being cut. The life of the conductive thin plate 10 can be relatively improved.

  Please refer to FIG. In the second preferred embodiment, the difference between the battery current collector 1 and the first preferred embodiment is the reinforcing portion 12. Since the structural forms of the outer edge portion 11 and the mesh portion 13 are all the same as those in the first preferred embodiment, redundant description is omitted in this embodiment.

As shown in the drawing, some of the reinforcing sheets 121 are inclined along the first direction D1 to be the first reinforcing sheet 121a, and the remaining reinforcing sheets 121 are in the second direction in which the direction is different from the first direction D1. By forming the second reinforcing sheet 121b obliquely along D2, an angle A is formed at the connection between each first reinforcing sheet 121a and each second reinforcing sheet 121b, and a single first One reinforcing sheet 121a and a single second reinforcing sheet 121b jointly constitute a V-shaped appearance.
In this embodiment, the plurality of first reinforcing sheets 121a are arranged at intervals, and the plurality of second reinforcing sheets 121b are also arranged at intervals. Among these, one second reinforcing sheet 121b is provided between the two first reinforcing sheets 121a. Both opposing ends of one reinforcing sheet 121 are connected to the annular sheet 113 and the second reinforcing sheet 121b, respectively, and both opposing ends of one second reinforcing sheet 121b are respectively the annular sheet 113 and the first reinforcing sheet. The opposite ends of the remaining second reinforcing sheet 121b connected to the sheet 121a are connected to different first reinforcing sheets 121a, respectively.

  Please refer to FIG. In the third preferred embodiment, the difference between the battery current collector 1 and the second preferred embodiment is that the difference between the plurality of first reinforcing sheets 121a and the plurality of second reinforcing sheets 121b. This is the arrangement method. About the structure form of the outer edge part 11 and the mesh part 13, since it is the same as that of a 2nd preferable aspect, the overlapping description is abbreviate | omitted in this aspect.

  As shown in the figure, the central segment of each first reinforcing sheet 121a intersects one second reinforcing sheet 121b, thereby connecting the first reinforcing sheet 121a and the second reinforcing sheet 121b. The single first reinforcing sheet 121a and one second reinforcing sheet 121b together form an X-shaped appearance. In this embodiment, the end of each first reinforcing sheet 121a is connected to a second reinforcing sheet 121b that intersects the other first reinforcing sheet 121a, and similarly, each second reinforcing sheet 121b The end portion is connected to the first reinforcing sheet 121a that intersects the other second reinforcing sheet 121b.

  Please refer to FIG. In the fourth preferred embodiment, the difference between the battery current collector 1 and the first preferred embodiment is the mesh portion 13. Since the structural forms of the outer edge portion 11 and the reinforcing portion 12 are all the same as in the first preferred embodiment, redundant description is omitted in this embodiment.

  As shown in the figure, the mesh unit 13 further includes a third region 136 that surrounds the first region 131, so that the mesh unit 13 mainly includes the first region 131, the second region 132, and the third region 136. . In the third region 136, a plurality of third through holes 137 having the same shape as the first through holes 133 are distributed, and the plurality of third through holes 137 are arranged at intervals. The In particular, the distance between the two third through-holes 137 is a third distance S3 that is longer than the first distance S1 so that the pitch between the through-holes is increased within the mesh portion 13. Gradually increases toward the outside of the mesh portion 13. In this embodiment, the through-hole surface 135 is configured by combining the end surfaces of the plurality of first through-holes 133, the end surfaces of the plurality of second through-holes 134, and the plurality of third through-holes 137. It is.

  The embodiments described above are merely for convenience of explanation of the present invention, and do not limit the present invention. Various simple variations and modifications made by a person skilled in the art based on the claims of the present invention and the description of the invention without departing from the spirit of the present invention are intended to be included in the following claims.

DESCRIPTION OF SYMBOLS 1 Conductive collector for batteries 10 Conductive thin plate 101 Long side 102 Short side 11 Outer edge part 111 First outer edge sheet 112 Second outer edge sheet 113 Annular sheet 12 Reinforcement part 121 Reinforcement sheet 121a First reinforcement sheet 121b First Second reinforcing sheet 13 Mesh portion 131 First region 132 Second region 133 First through hole 134 Second through hole 135 Through hole surface 136 Third region 137 Third through hole 2 Battery structure 20 Hollow case 21 Positive electrode 22 Negative electrode 23 Separator 24 Electrolyte A Angle D1 First direction D2 Second direction S1 First distance S2 Second distance S3 Third distance

Claims (10)

An outer edge portion having a plurality of outer edge sheets connected to each other to form an annular sheet;
A reinforcing portion having a plurality of reinforcing sheets formed on the outer edge portion, each of which is inclined with respect to the outer edge sheet positioned inside the annular sheet;
A plurality of mesh portions formed between the outer edge portion and the reinforcing portion, each of which is located on a side of the first region and a first region located on the periphery of the mesh portion. A plurality of first through holes arranged at intervals with a first distance in the first region, and the second region has a length. A plurality of mesh portions in which a plurality of second through holes arranged at intervals with a second distance shorter than the first distance are distributed.
Conductive current collector for batteries.   2. The battery conductive material according to claim 1, wherein all of the reinforcing sheets are inclined with respect to the outer edge sheet in the same direction, and the plurality of reinforcing sheets are arranged at intervals. Sex collector.   Some of the reinforcing sheets are inclined along the first direction as the first reinforcing sheet, and some of the other reinforcing sheets are inclined along the second direction whose direction is different from the first direction. The conductive current collector for a battery according to claim 1, wherein the second reinforcing sheet is used.   An end of each of the first reinforcing sheets is connected to one of the second reinforcing sheets so that an angle is formed between the first reinforcing sheet and the second reinforcing sheet, and 4. The conductive current collector for a battery according to claim 3, wherein the single first reinforcing sheet and the single second reinforcing sheet collectively form a V-shaped external shape. 5. body.   The first reinforcing sheet intersects with one of the second reinforcing sheets, so that the single first reinforcing sheet and the single second reinforcing sheet jointly form an X shape. The conductive current collector for a battery according to claim 3, wherein:   The external appearance of the battery conductive current collector is rectangular, the outer periphery is provided with two long sides arranged at intervals, and two short sides perpendicular to the long side, The conductive collector for a battery according to claim 1, wherein the length of the reinforcing sheet is between the long side and the short side.   Each of the first region and the second region is located on opposite sides of the mesh portion, one of the first region and the second region is adjacent to the outer edge portion, and the other is the reinforcing portion. The conductive current collector for a battery according to claim 1, which is adjacent to each other.   The first region surrounds the outer edge of the second region, so that the second region is positioned inside the first region, and the first region is adjacent to the reinforcing portion alone. The conductive current collector for a battery according to claim 1, wherein the conductive current collector can be adjacent to the outer edge portion and the reinforcing portion at the same time.   A through hole surface is formed by combining the end surfaces of the plurality of first through holes and the end surfaces of the plurality of second through holes, and the through hole surface is 40% of the surface of the battery current collector. The conductive current collector for a battery according to claim 1, which occupies the above. The mesh portion further includes a third region located on one side of the first region, and a plurality of third through holes arranged at intervals are distributed in the third region. 2. The battery conductivity according to claim 1, wherein a third distance that is longer than the first distance is formed at a pitch between the two third through holes. Current collector.

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