WO2021003680A1 - 极片、电池单元及电池组 - Google Patents

极片、电池单元及电池组 Download PDF

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Publication number
WO2021003680A1
WO2021003680A1 PCT/CN2019/095324 CN2019095324W WO2021003680A1 WO 2021003680 A1 WO2021003680 A1 WO 2021003680A1 CN 2019095324 W CN2019095324 W CN 2019095324W WO 2021003680 A1 WO2021003680 A1 WO 2021003680A1
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Prior art keywords
battery
pole piece
unit
coating
battery unit
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Application number
PCT/CN2019/095324
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English (en)
French (fr)
Inventor
董佳丽
Original Assignee
宁德新能源科技有限公司
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Publication date
Application filed by 宁德新能源科技有限公司 filed Critical 宁德新能源科技有限公司
Priority to PCT/CN2019/095324 priority Critical patent/WO2021003680A1/zh
Priority to CN201980097213.1A priority patent/CN114097105A/zh
Publication of WO2021003680A1 publication Critical patent/WO2021003680A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material

Definitions

  • This application relates to the field of batteries, and in particular to a pole piece, a battery unit using the pole piece, and a battery pack using the battery unit.
  • Lithium ion has been widely used in portable battery products for its advantages of high energy density, high working voltage, long cycle life, environmental protection and safety. With the continuous development of the battery industry, there are more and more types of portable consumer electronic products with different sizes and shapes, so there are differences in the shape requirements of the batteries in electronic products.
  • a pole piece comprising a pole piece main body, the pole piece main body including a coating unit, and the coating unit includes at least one of a regular hexagonal coating unit and a trapezoidal coating unit;
  • the trapezoidal coating unit includes a first oblique side, a first parallel side, a second oblique side, and a second parallel side that are connected in sequence.
  • the midpoint of the second parallel side is to the four sides of the trapezoidal coating unit
  • the distances of the vertices are equal, and the side lengths of the first hypotenuse, the first parallel side, and the second hypotenuse are equal.
  • the pole piece further includes a pole piece connected to the pole piece body; the pole piece is arranged on any side of the regular hexagon or the trapezoid.
  • the coating unit includes a current collector in a regular hexagon and/or trapezoid shape, and an active material layer arranged on the surface of the current collector.
  • the pole piece includes a plurality of the coating units and uncoated units, and the plurality of coating units are arranged at intervals and are spaced apart by the uncoated units.
  • the side length of the coating unit in a regular hexagon is equal to the side length of the first oblique side.
  • the closest sides are arranged in parallel and have the same side length.
  • the pole piece includes a plurality of the coating units in a regular hexagon and a plurality of the coating units in a trapezoid;
  • the pole piece also includes a first direction and a second direction perpendicular to the first direction, and the coating units in a regular hexagon are arranged vertically along the first direction and extend along the second direction Arranged to form a coating array; the plurality of trapezoidal coating units are respectively arranged in the gap area of the coating array, and are spaced apart from the regular hexagonal coating units.
  • a battery cell comprising a first pole piece, a second pole piece, and an isolation film arranged between the first pole piece and the second pole piece, the first pole piece being the pole piece as described above .
  • a battery pack includes a first battery unit and a second battery unit connected to the first battery unit, wherein the first battery unit and the second battery unit are the battery units described above.
  • first battery unit and the second battery unit are respectively regular hexagonal battery units or trapezoidal battery units;
  • the first battery unit and the second battery unit are arranged adjacent to each other, and the closest sides of the first battery unit and the second battery unit are arranged in parallel and have the same length.
  • the battery pack includes a plurality of the first battery cells and a plurality of the second battery cells; wherein the first battery cell is a regular hexagonal battery cell, and the second battery cell is a trapezoidal battery unit;
  • the battery pack also includes a third direction and a fourth direction perpendicular to the third direction.
  • the regular hexagonal battery cells are arranged vertically along the third direction and are arranged in an extended arrangement along the fourth direction to form a battery A cell array; the plurality of trapezoidal battery cells are respectively arranged in the gap area of the battery cell array, and are arranged at intervals from the regular hexagonal battery cells;
  • the pole piece prepared by the coating unit in a regular hexagon and/or trapezoid shape is advantageous for bending and deformation, the battery unit and the battery pack prepared from the above pole piece can be processed in multiple angles and multiple directions. The bending greatly improves the deformability of the battery pack.
  • FIG. 1 is a schematic diagram of the structure of a pole piece according to an embodiment of the application.
  • Fig. 2 is an exploded schematic diagram of a pole piece body according to an embodiment of the application.
  • FIG. 3 is a schematic diagram of the structure of a current collector according to an embodiment of the application.
  • FIG. 4 is a schematic diagram of the structure of a pole piece according to another embodiment of the application.
  • Fig. 5 is an exploded schematic diagram of a pole piece body according to another embodiment of the application.
  • FIG. 6 is a schematic structural diagram of a current collector according to another embodiment of the application.
  • FIG. 7 is a schematic structural diagram of a pole piece according to another embodiment of the application.
  • FIG. 8 is a schematic structural diagram of a battery unit according to an embodiment of the application.
  • FIG. 9 is a schematic structural diagram of a battery unit according to another embodiment of the application.
  • FIG. 10 is a schematic structural diagram of a battery unit according to another embodiment of the application.
  • FIG. 11 is a schematic structural diagram of a battery unit according to another embodiment of the application.
  • FIG. 12 is a schematic diagram of the structure of a similar circular battery pack according to an embodiment of the application.
  • FIG. 13 is a schematic diagram of the structure of an annular battery pack according to an embodiment of the application.
  • FIG. 14 is a schematic structural diagram of a straight battery pack according to an embodiment of the application.
  • FIG. 15 is a schematic structural diagram of an arc-shaped battery pack according to an embodiment of the application.
  • FIG. 16 is a schematic structural diagram of a battery pack according to another embodiment of the application.
  • FIG. 17 is a schematic structural diagram of a battery pack according to another embodiment of the application.
  • FIG. 18 is a schematic structural diagram of a battery pack according to another embodiment of the application.
  • FIG. 19 is a schematic diagram of the structure of the battery pack according to the next embodiment of the application.
  • FIG. 20 is a schematic structural diagram of a battery pack according to another embodiment of the application.
  • FIG. 21 is a schematic structural diagram of a battery pack according to another embodiment of the application.
  • Pole piece 10 Pole piece body 11 Lug 13 Current collector 1132 Active material layer 1131 Coating unit 113 Uncoated unit 111 First direction X Second direction Y Strengthening layer 15 First side 11a Second side 11b Third side 11c Fourth side 11d Battery unit 100 First pole piece 10a Second pole piece 10b Isolation film 30 Battery 200 First battery unit 100a Second battery unit 100b Third direction X’
  • the pole piece 10 includes a pole piece body 11, and the pole piece body 11 includes a coating unit 113.
  • the coating unit 113 may include a coating unit having a regular hexagon.
  • the pole piece body 11 may be a regular hexagon (please refer to FIG. 1).
  • the pole piece 10 further includes a pole lug 13 which is arranged on the pole piece body 11 and protrudes from any side of the pole piece body 11 of a regular hexagon.
  • the tab 13 may include a plurality of tab units; and the tab 13 can also be arranged on any two regular hexagonal sides of the pole piece body 11. Intersections to better meet space utilization needs.
  • the coating unit 113 includes a current collector 1132 and an active material layer 1131 disposed on the surface of the current collector 1132.
  • the shape of the current collector 1132 corresponds to the shape of the pole piece body 11 and is a regular hexagon.
  • the pole piece body 11 includes at least one coating unit 113, and the active material layer 1131 covers the entire current collector 1132 of the coating unit 113.
  • the pole piece body 11 includes a coating unit 113.
  • the pole piece body 11 may further include an uncoated unit 111.
  • the uncoated unit 111 may be a current collector without an active material layer.
  • the uncoated unit 111 may be arranged around the coating unit 113.
  • the pole piece body 11 includes a plurality of the coating units 113 and the uncoated units 111.
  • the plurality of coating units 113 are arranged at intervals and are spaced apart by the uncoated units 111.
  • the coating unit 113 may have a trapezoidal shape.
  • the trapezoidal coating unit includes a first oblique side, a first parallel side, a second oblique side, and a second parallel side that are sequentially connected, and the midpoint of the second parallel side is to the trapezoidal coating
  • the four vertices of the unit have the same distance, and the side lengths of the first hypotenuse, the first parallel side, and the second hypotenuse are equal.
  • the pole piece body 11 may be trapezoidal.
  • the trapezoid includes a first side 11a, a second side 11b, a third side 11c, and a fourth side 11d connected in sequence, wherein the second side 11b is parallel to the fourth side 11d, and the fourth side
  • the distances from the midpoint of 11d to the four vertices of the trapezoid are equal, and the side lengths of the first side 11a, the second side 11b, and the third side 11c are equal.
  • the tab 13 protrudes from any side of the trapezoid.
  • the trapezoidal coating unit 113 includes a current collector 1132 and an active material layer 1131 disposed on the surface of the current collector 1132.
  • the shape of the current collector 1132 may correspond to the shape of the pole piece body 11, and is trapezoidal.
  • the pole piece body 11 includes at least one trapezoidal coating unit 113, and the active material layer 1131 covers the entire current collector 1132 of the coating unit 113.
  • the pole piece body 11 includes a trapezoidal coating unit 113.
  • the pole piece body 11 may further include an uncoated unit 111.
  • the uncoated unit 111 may be arranged around the coating unit 113.
  • the pole piece body 11 may also include a plurality of trapezoidal coated units 113 and uncoated units 111.
  • the plurality of trapezoidal coating units 113 are arranged at intervals and are spaced apart by the uncoated units 111.
  • the pole piece 10 may further include a strengthening layer 15 (see FIGS. 2 and 5), and the strengthening layer 15 is provided corresponding to the coating unit 113 but not corresponding to the uncoated unit 111 It is arranged to enhance the rigidity of the coating unit 113, so that when the pole piece 10 is subjected to an external force, the stress is concentrated on the uncoated unit 111, thereby reducing the risk of the active material layer 1131 falling off.
  • a strengthening layer 15 see FIGS. 2 and 5
  • the strengthening layer 15 is provided corresponding to the coating unit 113 but not corresponding to the uncoated unit 111 It is arranged to enhance the rigidity of the coating unit 113, so that when the pole piece 10 is subjected to an external force, the stress is concentrated on the uncoated unit 111, thereby reducing the risk of the active material layer 1131 falling off.
  • the pole piece body 11 may also be a parallelogram (including a rectangle) or other shapes.
  • the pole piece body 11 when the pole piece body 11 may be rectangular, the pole piece body 11 also includes a plurality of coating units 113 and uncoated units 111, and the plurality of coating units 113 are arranged at intervals ,
  • the uncoated unit 111 is connected to a plurality of coating units 113.
  • the coating unit 113 may be at least one of a regular hexagonal coating unit and a trapezoidal coating unit.
  • the coating unit 113 includes both a regular hexagonal coating unit and a trapezoidal coating unit.
  • the side length of the coating unit in a regular hexagon is equal to the side length of the first oblique side of the coating unit in the trapezoid shape.
  • the closest sides are arranged in parallel and have the same side length.
  • the pole piece 10 further includes a first direction X and a second direction Y perpendicular to the first direction X.
  • the coating units in a regular hexagonal shape can be arranged at vertical intervals along the first direction X, and The coating arrays are arranged at intervals extending along the second direction Y.
  • the trapezoidal coating unit can be respectively arranged in the gap area of the coating array and spaced apart from the regular hexagonal coating unit.
  • the uncoated unit 111 may include a plurality of uncoated units 111, and each uncoated unit 111 is disposed on two adjacent sides of two adjacent coating units 111 to connect the adjacent The two coating units 111.
  • the above-mentioned pole piece 10 is applied to the battery unit 100.
  • the battery cell 100 includes a first pole piece 10a, a second pole piece 10b, and an isolation film 30 between the first pole piece 10a and the second pole piece 10b.
  • the first pole piece 10a is the pole piece 10 provided by this application.
  • first pole piece 10a and the second pole piece 10b are both pole pieces 10 provided by the present application.
  • the shape of the pole piece body 11 of the first pole piece 10a is the same as the shape of the pole piece body 11 of the second pole piece 10b and is arranged correspondingly , So that the shape of the battery cell 100 is the same as the shape of the first pole piece 10a. More preferably, the battery cell 100, like the pole piece 10, has a regular hexagonal shape or the above-mentioned trapezoid shape, that is, a regular hexagonal battery cell or a trapezoidal battery cell.
  • the battery unit 100 may also have a rectangular shape, a parallelogram shape other than a rectangular shape, or other shapes like the pole piece 10.
  • the battery pack 200 includes a first battery unit 100a and a second battery unit 100b.
  • the first battery cell 100a and the second battery cell 100b are the battery cells 100 provided in this application.
  • the first battery unit 100a and the second battery unit 100b are adjacently arranged and spaced apart, and the closest side of the first battery unit 100a and the second battery unit 100b is arranged in parallel and has the same side length.
  • the first battery cell 100a is electrically connected to the second battery cell 100b.
  • the first battery cell 100a is the above-mentioned regular hexagon battery cell or the above-mentioned trapezoidal battery cell
  • the second battery cell 100b is the above-mentioned regular hexagon battery cell or the above-mentioned trapezoidal battery cell. Trapezoidal battery unit.
  • the first battery cell 100a and the second battery cell 100b are both the above-mentioned regular hexagonal battery cells, and a plurality of first battery cells
  • the battery cells 100a and the second battery cells 100b can be arranged at intervals in a substantially circular arrangement, a ring arrangement, a straight strip arrangement or an arbitrary arc arrangement, so that the battery pack 200 is a round-like battery pack, a ring-shaped battery pack, a straight Strip battery pack or curved battery pack.
  • the battery cells (100a, 100b) in the battery pack 200 may be arranged in series or in parallel, and may also be arranged in series and in parallel at the same time.
  • the battery pack 200 includes a plurality of the first battery cells 100a and a plurality of the second battery cells 100b, wherein the first battery cells 100a are hexagonal
  • the second battery unit 100b is a trapezoidal battery unit, and the first side 11a of the trapezoidal battery unit is equal to the side length of the regular hexagonal battery unit.
  • the battery pack 200 also includes a third direction X'and a fourth direction Y'perpendicular to the third direction X'.
  • the regular hexagonal battery cells are arranged at vertical intervals along the third direction X', and are arranged at intervals along the fourth direction Y'to form a battery cell array.
  • the trapezoidal battery cells are arranged in the gap area of the battery cell array, and are arranged at intervals from the regular hexagonal battery cells.
  • the battery cells (100a, 100b) in the battery pack 200 can be arranged in series or in parallel. In this embodiment, the battery cells (100a, 100b) are arranged in series.
  • the difference from FIG. 16 is that the battery cells (100a, 100b) arranged vertically spaced along the third direction X'in the battery pack 200 are connected in series to form a sub-battery pack , The sub-batteries arranged in parallel along the fourth direction Y'are arranged in parallel.
  • the regular hexagonal battery cells and the trapezoidal battery cells can also be arranged in any other shape at intervals.
  • the first battery cell 100a and the second battery cell 100b may be parallelogram battery cells, such as ordinary parallelogram battery cells or rectangular batteries. unit.
  • the first battery cell 100a and the second battery cell 100b may both be common parallelogram battery cells.
  • a plurality of the parallelogram battery cells respectively extend and arrange at intervals along two directions where the two intersecting sides are located to form a battery pack 200, and the battery cells (100a, 100b) in the battery pack 200 are arranged in series.
  • the first battery cell 100a and the second battery cell 100b are both rectangular battery cells.
  • each first battery unit 100a and a second battery unit 100b are substantially L-shaped connected to form a sub-battery pack.
  • the first battery unit 100a and the second battery unit 100b have An angle.
  • a plurality of L-shaped sub-battery packs are arranged adjacently and spaced apart in turn.
  • one sub-battery pack is located at an angle of the other sub-battery pack, and two first battery cells 100a are arranged in parallel, and two The second battery cells 100b are arranged in parallel.
  • the first battery cell 100a or the second battery cell 100b in each sub-battery group is connected to the first battery cell 100a or the second battery cell 100b of the adjacent sub-battery group.
  • a plurality of rectangular battery cells are arranged at intervals along the third direction X'and connected in series to form a sub-battery group, and the plurality of sub-battery groups are arranged along the fourth direction Y 'It is arranged at intervals and arranged in parallel through a conductive structure (not shown in the figure).
  • the rectangular battery cells in two adjacent sub-battery groups can be side by side or staggered. As shown in FIG.
  • a plurality of rectangular battery cells are arranged at intervals along the third direction X'to form a battery cell group, and two battery cell groups are along the fourth direction Y' They are arranged at intervals, and the battery cells in the two battery cell groups are staggered.
  • each rectangular battery cell is connected in series with the rectangular battery cells in the adjacent battery cell group.
  • Any two battery units can be bent and connected to the flexible connecting member (such as the tab 13) between the two battery units to make the battery pack 200 flexible.
  • the pole piece 10 of the present application includes a coating unit in a regular hexagon or trapezoid shape, the pole piece 10 is easy to bend or deform at multiple angles.
  • the battery pack 200 of the present application due to the shape design of the pole pieces 10 and the design of the battery cells 100 (100a, 100b), makes the battery pack 200 not only flexible, but also diversified in bending methods and bending paths.
  • the battery pack 200 in this application including at least one of regular hexagonal battery cells made of regular hexagonal pole pieces or trapezoidal battery cells made of trapezoidal pole pieces can be bent in multiple angles and multiple directions, which is extremely The deformability of the battery pack 200 is improved.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

一种极片（10），其包括极片主体（11），所述极片主体（11）包括涂布单元（113），所述涂布单元（113）包括呈正六边形的涂布单元（113）及呈梯形的涂布单元（113）中的至少一种；所述呈梯形的涂布单元（113）包括依次连接的第一斜边、第一平行边、第二斜边及第二平行边，所述第二平行边的中点到所述呈梯形的涂布单元（113）的四个顶点的距离相等，且所述第一斜边、第一平行边及第二斜边的边长相等。一种应用上述极片（10）的电池单元（100）及应用该电池单元（100）的电池组（200），所述极片（10）提高了所述电池组（200）的变形能力。

Description

极片、电池单元及电池组 技术领域
本申请涉及电池领域，尤其涉及一种极片、应用所述极片的电池单元及应用所述电池单元的电池组。
背景技术
锂离子以其高能量密度，高工作电压、长循环寿命及环保安全等优点，一直以来在便携式电池产品中得到大量应用。随着电池工业不断发展，便携式消费类电子产品种类越来越多，大小及形状各异，因而对电子产品中的电池的形状要求也存在差异。
发明内容
鉴于上述情况，有必要提供一种有利于弯折的极片。
另外，还有需要提供一种应用上述极片的电池单元及应用上述电池单元的电池组。
一种极片，其包括极片主体，所述极片主体包括涂布单元，所述涂布单元包括呈正六边形的涂布单元及呈梯形的涂布单元中的至少一种；所述呈梯形的涂布单元包括依次连接的第一斜边、第一平行边、第二斜边及第二平行边，所述第二平行边的中点到所述呈梯形的涂布单元的四个顶点的距离相等，且所述第一斜边、第一平行边及第二斜边的边长相等。
进一步地，所述极片还包括连接于所述极片主体的极耳；所述极耳设置于所述正六边形或所述梯形的任意一条边。
进一步地，所述涂布单元包括呈正六边形和/或梯形的集流体，及设置于所述集流体表面的活性材料层。
进一步地，所述极片包括复数个所述涂布单元以及未涂布单元，所述复数个涂布单元之间间隔排布，并通过所述未涂布单元间隔开。
进一步地，；
所述呈正六边形的涂布单元的边长与所述第一斜边的边长相等。
进一步地，相邻的两个所述涂布单元中，最接近的边平行设置且边长相等。
进一步地，所述极片包括复数个所述呈正六边形的涂布单元及复数个所述呈梯形的涂布单元；
所述极片还包括第一方向及与所述第一方向垂直的第二方向，所述呈正六边形的涂布单元沿所述第一方向竖直排列，并沿所述第二方向延伸排列形成涂布阵列；所述复数个呈梯形的涂布单元分别设置于所述涂布阵列的空隙区，并与所述呈正六边形的涂布单元间隔设置。
一种电池单元，包括第一极片、第二极片及设置于所述第一极片与所述第二极片之间的隔离膜，所述第一极片为如上所述的极片。
一种电池组，包括第一电池单元和与所述第一电池单元连接的第二电池单元，其中，所述第一电池单元及所述第二电池单元为如上所述的所述电池单元。
进一步地，所述第一电池单元及所述第二电池单元分别为正六边形电池单元或梯形电池单元；
所述第一电池单元和所述第二电池单元相邻设置，且所述第一电池单元和所述第二电池单元的最接近的边平行设置且边长相等。
进一步地，所述电池组包括复数个所述第一电池单元和复数个所述第二电池单元；其中，所述第一电池单元为正六边形电池单元，所述第二电池单元为梯形电池单元；
所述电池组还包括第三方向及与所述第三方向垂直的第四方向，所述正六边形电池单元沿所述第三方向竖直排列，并沿所述第四方向延伸排列形成电池单元阵列；所述复数个梯形电池单元分别设置于所述电池单元阵列的空隙区，并与所述正六边形电池单元间隔设置；
复数个所述第一电池单元之间、复数个所述第一电池单元与所述复数个 所述第二电池单元之间、或者复数个所述第二电池单元之间连接。
本申请的电池组，由于包括呈正六边形及/或梯形的涂布单元制备的极片有利于弯折及变形，使得及由上述极片制备的电池单元及电池组能够多角度多方向进行弯折，极大的提高了所述电池组的变形能力。
附图说明
图1为本申请一实施例的极片的结构示意图。
图2为本申请一实施例的极片主体的分解示意图。
图3为本申请一实施例的集流体的结构示意图。
图4为本申请另一实施例的极片的结构示意图。
图5为本申请另一实施例的极片主体的分解示意图。
图6为本申请另一实施例的集流体的结构示意图。
图7为本申请又一实施例的极片的结构示意图。
图8为本申请一实施例的电池单元的结构示意图。
图9为本申请另一实施例的电池单元的结构示意图。
图10为本申请再一实施例的电池单元的结构示意图。
图11为本申请又一实施例的电池单元的结构示意图。
图12为本申请一实施例的类圆形电池组的结构示意图。
图13为本申请一实施例的环形电池组的结构示意图。
图14为本申请一实施例的直条状电池组的结构示意图。
图15为本申请一实施例的弧形电池组的结构示意图。
图16为本申请另一实施例的电池组的结构示意图。
图17为本申请再一实施例的电池组的结构示意图。
图18为本申请又一实施例的电池组的结构示意图。
图19为本申请下一实施例的电池组的结构示意图。
图20为本申请另一实施例的电池组的结构示意图。
图21为本申请再一实施例的电池组的结构示意图。
主要元件符号说明
极片 10
极片主体 11
极耳 13
集流体 1132
活性材料层 1131
涂布单元 113
未涂布单元 111
第一方向 X
第二方向 Y
强化层 15
第一边 11a
第二边 11b
第三边 11c
第四边 11d
电池单元 100
第一极片 10a
第二极片 10b
隔离膜 30
电池组 200
第一电池单元 100a
第二电池单元 100b
第三方向 X’
第四方向 Y’
如下具体实施方式将结合上述附图进一步说明本申请。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。
下面结合附图，对本申请的一些实施方式作详细说明。在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。
请参阅图1，根据本申请的一个实施例，极片10包括极片主体11，所述极片主体11包括涂布单元113。所述涂布单元113可包括呈正六边形的涂布单元。
在一些实施例中，所述极片主体11可呈正六边形(请参阅图1)。所述极片10还包括极耳13，所述极耳13设置于所述极片主体11，并从正六边形的所述极片主体11的任意一条边突出。本领域技术人员可以理解，根据本申请的另一实施例，极耳13可以包括多个极耳单元；且极耳13也可以设置于所述极片主体11的任意两条正六边形边的相交处，以更好地满足空间利用需求。
请参阅图2，所述涂布单元113包括集流体1132及设置于所述集流体1132表面的活性材料层1131。其中，所述集流体1132的形状与所述极片主体11的形状对应，呈正六边形。所述极片主体11包括至少一涂布单元113，所述活性材料层1131覆盖整个所述涂布单元113的集流体1132。
在一些实施例中，所述极片主体11包括一个涂布单元113。根据本申请 的一个实施例，所述极片主体11还可包括未涂布单元111。所述未涂布单元111可为未设有活性材料层的集流体。在本实施例中，所述未涂布单元111可环绕所述涂布单元113设置。
在一些实施例中，请参阅图3，所述极片主体11包括复数个所述涂布单元113以及未涂布单元111。所述复数个涂布单元113之间间隔排布，并通过所述未涂布单元111相间隔。
在一些实施例中，请参阅图4，所述涂布单元113可呈梯形。其中，呈梯形的所述涂布单元包括依次连接的第一斜边、第一平行边、第二斜边及第二平行边，所述第二平行边的中点到所述梯形涂布的单元的四个顶点的距离相等，且所述第一斜边、所述第一平行边及第二斜边的边长相等。
在一些实施例中，请参阅图4，所述极片主体11可为梯形。所述梯形包括依次连接的第一边11a、第二边11b、第三边11c及第四边11d，其中，所述第二边11b与所述第四边11d平行，且所述第四边11d的中点到所述梯形的四个顶点的距离相等，所述第一边11a、所述第二边11b及所述第三边11c的边长相等。所述极耳13从所述梯形的任意一条边突出。
呈梯形的所述涂布单元113包括集流体1132及设置于所述集流体1132表面的活性材料层1131。其中，所述集流体1132的形状可以与所述极片主体11的形状对应，呈梯形。请参阅图5，所述极片主体11包括至少一呈梯形的涂布单元113，所述活性材料层1131覆盖整个所述涂布单元113的集流体1132。
在一些实施例中，所述极片主体11包括一个呈梯形的涂布单元113。所述极片主体11还可包括未涂布单元111。在本实施例中，所述未涂布单元111可环绕所述涂布单元113设置。
在一些实施例中，请参阅图6，所述极片主体11同样可包括复数个呈梯形的涂布单元113以及未涂布单元111。所述复数个呈梯形的涂布单元113之间间隔排布，并通过所述未涂布单元111相间隔。
在一些实施例中，所述极片10还可包括强化层15(请参见图2及图5)， 所述强化层15对应所述涂布单元113设置但不对应所述未涂布单元111设置，从而增强所述涂布单元113的刚性，使得所述极片10受外力作用时，应力集中于所述未涂布单元111，进而减少活性材料层1131脱落的风险。
可以理解的，所述极片主体11还可为平行四边形(包括矩形)或其他形状。请参阅图7，当所述极片主体11可以呈矩形，所述极片主体11同样包括复数个涂布单元113以及未涂布单元111，所述复数个涂布单元113之间间隔排布，所述未涂布单元111连接复数个涂布单元113。本实施例中，所述涂布单元113可为呈正六边形的涂布单元及呈梯形的涂布单元中的至少一种。
在一实施例中，所述涂布单元113同时包括呈正六边形的涂布单元及呈梯形涂布的单元。其中，所述呈正六边形的涂布单元的边长与所述呈梯形的涂布单元的第一斜边的边长相等。
优选的，相邻的两个所述涂布单元113中，最接近的边平行设置且边长相等。
所述极片10还包括第一方向X及与所述第一方向X垂直的第二方向Y，所述呈正六边形的涂布单元可沿所述第一方向X竖直间隔排列，并沿所述第二方向Y延伸间隔排列形成涂布阵列。所述呈梯形的涂布单元可分别设置于所述涂布阵列的空隙区，并与所述呈正六边形的涂布单元间隔设置。
在一些实施例中，所述未涂布单元111可包括复数个，且每一未涂布单元111设置于相邻的两个涂布单元111的相邻的两条边以连接所述相邻的两个涂布单元111。
请参阅图8至图10，将上述极片10应用于电池单元100中。其中，电池单元100包括第一极片10a、第二极片10b及位于所述第一极片10a与所述第二极片10b之间的隔离膜30。所述第一极片10a为本申请所提供的极片10。
在本实施例中，所述第一极片10a及所述第二极片10b均为本申请所提供的极片10。
在一些实施例中，优选的，请参阅图8及图9，所述第一极片10a的极片主体11的形状与所述第二极片10b的极片主体11的形状相同且对应设置，使得所述电池单元100的形状与所述第一极片10a的形状相同。更优选的，所述电池单元100与所述极片10一样，呈正六边形或上述梯形，即为正六边形电池单元或梯形电池单元。
可以理解的，请参阅图10及图11，所述电池单元100也可与所述极片10一样，呈矩形、除矩形外的平行四边形或其他形状。
请参阅图12至图21，将应用上述极片10的电池单元100应用于电池组200中。其中，所述电池组200包括第一电池单元100a及第二电池单元100b。所述第一电池单元100a及所述第二电池单元100b为为本申请所提供的电池单元100。所述第一电池单元100a与所述第二电池单元100b相邻并间隔设置，且所述第一电池单元100a与所述第二电池单元100b中最接近的边平行设置且边长相等。所述第一电池单元100a与所述第二电池单元100b电连接。
在一些实施例中，请参阅图12至图17，所述第一电池单元100a为上述正六边形电池单元或者上述梯形电池单元，所述第二电池单元100b为上述正六边形电池单元或者上述梯形电池单元。
请参阅图12至图15，在一些实施例中，所述电池组200中，所述第一电池单元100a及所述第二电池单元100b均为上述正六边形电池单元，且复数个第一电池单元100a及第二电池单元100b间隔设置可大致呈圆形排列、环状排列、直条状排列或者任意弧形排列，使得所述电池组200呈类圆形电池组、环形电池组、直条状电池组或者弧形电池组。所述电池组200中的电池单元(100a、100b)之间可进行串联设置或者并联设置，也可同时存在串联设置及并联设置。
请参阅图16，在另一实施例中，所述电池组200包括复数个所述第一电池单元100a及复数个所述第二电池单元100b，其中，所述第一电池单元100a为正六边形电池单元，所述第二电池单元100b为梯形电池单元，且所述梯形电池单元中的第一边11a与所述正六边形电池单元的边长相等。所述电池 组200还包括第三方向X’及与所述第三方向X’垂直的第四方向Y’。所述正六边形电池单元沿第三方向X’竖直间隔排列，并沿所述第四方向Y’延伸间隔排列形成电池单元阵列。所述梯形电池单元设置于所述电池单元阵列的空隙区，并与所述正六边形电池单元间隔设置。所述电池组200中的电池单元(100a、100b)之间可进行串联设置或者并联设置。本实施例中，所述电池单元(100a、100b)之间进行串联设置。
请参阅图17，在一实施例中，不同于图16之处在于，所述电池组200中沿所述第三方向X’竖直间隔排列的电池单元(100a、100b)串联形成子电池组，沿所述第四方向Y’延伸排列的子电池组之间并联设置。
在其他一些实施例中，所述正六边形电池单元及所述梯形电池单元还可间隔排列成其他任意形状。
可以理解的，在一些实施例中，请参阅图18至图21，所述第一电池单元100a与所述第二电池单元100b可为平行四边形电池单元，如普通的平行四边形电池单元或矩形电池单元。如图18所示，在所述实施例中，所述第一电池单元100a与所述第二电池单元100b可均为普通的平行四边形电池单元。复数个所述平行四边形电池单元分别沿相交的两条边所在的两个方向间隔延伸排列形成电池组200，且所述电池组200中各电池单元(100a、100b)之间串联设置。如图19所示，在所述实施例中，所述第一电池单元100a与所述第二电池单元100b均为矩形电池单元。其中，每一第一电池单元100a与一第二电池单元100b大致呈L形连接形成子电池组，所述子电池组中，所述第一电池单元100a与所述第二电池单元100b间具有一夹角。复数个L形的子电池组依次相邻间隔设置，其中，相邻两子电池组中，一子电池组位于另一子电池组的夹角处，且两第一电池单元100a平行设置，两第二电池单元100b平行设置。每一子电池组中的第一电池单元100a或第二电池单元100b与相邻子电池组的第一电池单元100a或第二电池单元100b连接。如图20所示，在另一由矩形电池单元组合形成的电池组200中，复数个矩形电池单元沿第三方向X’间隔排列并串联形成子电池组，多个子电池组沿第四方向 Y’间隔排列并通过一导电结构(图未标)并联设置。其中，相邻两子电池组中的矩形电池单元可并排也可错开。如图21所示，在另一由矩形电池单元组合形成的电池组200中，复数个矩形电池单元沿第三方向X’间隔排列形成电池单元组，两个电池单元组沿第四方向Y’间隔排列，且两个电池单元组中的电池单元错开。其中，每一矩形电池单元与相邻电池单元组中的矩形电池单元串联。
任意两电池单元之间可通过弯折连接于所述两电池单元之间的柔性连接件(如极耳13)的方式使得所述电池组200具有可挠性。
本申请的极片10，由于其包括呈正六边形或梯形的涂布单元，使得所述极片10便于多角度弯折或形变。本申请的电池组200，由于其极片10的形状设计及电池单元100(100a、100b)的设计，使得电池组200不仅具有可挠性，而且弯折的方式及弯折的路径多样化，尤其是本申请中包括由正六边形极片制备的正六边形电池单元或者有梯形极片制备的梯形电池单元中至少一种的电池组200，能够多角度多方向进行弯折，极大的提高了电池组200的变形能力。
另外，对于本领域的普通技术人员来说，可以根据本申请的技术构思做出其它各种相应的改变与变形，而所有这些改变与变形都应属于本申请权利要求的保护范围。

Claims (11)

  1. 一种极片，其包括极片主体，其特征在于，所述极片主体包括涂布单元，所述涂布单元包括呈正六边形的涂布单元及呈梯形的涂布单元中的至少一种；所述呈梯形的涂布单元包括依次连接的第一斜边、第一平行边、第二斜边及第二平行边，所述第二平行边的中点到所述呈梯形的涂布单元的四个顶点的距离相等，且所述第一斜边、第一平行边及第二斜边的边长相等。
  2. 如权利要求1所述的极片，其特征在于，所述极片还包括连接于所述极片主体的极耳；所述极耳设置于所述正六边形或所述梯形的任意一条边。
  3. 如权利要求1所述的极片，其特征在于，所述涂布单元包括呈正六边形和/或梯形的集流体，及设置于所述集流体表面的活性材料层。
  4. 如权利要求3所述的极片，其特征在于，所述极片主体包括复数个所述涂布单元以及未涂布单元，所述复数个涂布单元之间间隔排布，并通过所述未涂布单元间隔开。
  5. 如权利要求1所述的极片，其特征在于，所述呈正六边形的涂布单元的边长与所述第一斜边的边长相等。
  6. 如权利要求5所述的极片，其特征在于，相邻的两个所述涂布单元中，最接近的边平行设置且边长相等。
  7. 如权利要求6所述的极片，其特征在于，所述极片包括复数个所述呈正六边形的涂布单元及复数个所述呈梯形的涂布单元；
    所述极片还包括第一方向及与所述第一方向垂直的第二方向，所述呈正六边形的涂布单元沿所述第一方向竖直排列，并沿所述第二方向延伸排列形成涂布阵列；所述复数个呈梯形的涂布单元分别设置于所述涂布阵列的空隙区，并与所述呈正六边形的涂布单元间隔设置。
  8. 一种电池单元，包括第一极片、第二极片及设置于所述第一极片与所述第二极片之间的隔离膜，其特征在于，所述第一极片为权利要求1-7任意一项所述的极片。
  9. 一种电池组，其特征在于，包括第一电池单元和与所述第一电池单元连接的第二电池单元，其中，所述第一电池单元及所述第二电池单元为权利要求8所述的电池单元。
  10. 如权利要求9所述的电池组，其特征在于，所述第一电池单元及所述第二电池单元分别为正六边形电池单元或梯形电池单元；
    所述第一电池单元和所述第二电池单元相邻设置，且所述第一电池单元和所述第二电池单元的最接近的边平行设置且边长相等。
  11. 如权利要求10所述的电池组，其特征在于，所述电池组包括复数个所述第一电池单元和复数个所述第二电池单元；其中，所述第一电池单元为正六边形电池单元，所述第二电池单元为梯形电池单元；
    所述电池组还包括第三方向及与所述第三方向垂直的第四方向，所述正六边形电池单元沿所述第三方向竖直排列，并沿所述第四方向延伸排列形成电池单元阵列；所述复数个梯形电池单元分别设置于所述电池单元阵列的空隙区，并与所述正六边形电池单元间隔设置；
    复数个所述第一电池单元之间、复数个所述第一电池单元与所述复数个所述第二电池单元之间、或者复数个所述第二电池单元之间连接。
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