WO2023221006A1 - Battery cell, battery, and terminal device - Google Patents

Battery cell, battery, and terminal device Download PDF

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Publication number
WO2023221006A1
WO2023221006A1 PCT/CN2022/093700 CN2022093700W WO2023221006A1 WO 2023221006 A1 WO2023221006 A1 WO 2023221006A1 CN 2022093700 W CN2022093700 W CN 2022093700W WO 2023221006 A1 WO2023221006 A1 WO 2023221006A1
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WO
WIPO (PCT)
Prior art keywords
pole
pole pieces
pole piece
piece
battery core
Prior art date
Application number
PCT/CN2022/093700
Other languages
French (fr)
Chinese (zh)
Inventor
王硕
Original Assignee
北京小米移动软件有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to PCT/CN2022/093700 priority Critical patent/WO2023221006A1/en
Priority to CN202280004849.9A priority patent/CN117859224A/en
Publication of WO2023221006A1 publication Critical patent/WO2023221006A1/en

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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/103—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present disclosure relates to the field of battery technology, and in particular to a battery core, a battery and terminal equipment having the battery core.
  • the surfaces in the thickness direction of the battery core are all flat surfaces, and there is installation interference between the relevant components and the battery core in the area where the terminal equipment is used to place the battery core.
  • the overall thickness of the battery is usually reduced by reducing the number of pole pieces to avoid interference between the battery core and related components.
  • reducing the number of pole pieces will reduce the battery capacity, and the terminal equipment has space utilization of the accommodation cavity. low question.
  • the present disclosure aims to solve one of the technical problems in the related art, at least to a certain extent.
  • embodiments of the present disclosure provide a battery core. This battery cell has the advantages of high battery capacity and space utilization.
  • Embodiments of the present disclosure also provide a battery.
  • An embodiment of the present disclosure also provides a terminal device.
  • the battery core of the embodiment of the present disclosure includes a plurality of pole pieces.
  • the plurality of pole pieces are stacked along a preset direction.
  • the plurality of pole pieces include a positive pole piece and a negative pole piece.
  • the positive pole piece and the negative pole piece are in Alternately arranged in the preset direction, the battery cores have first surfaces and second surfaces oppositely arranged in the preset direction, and at least one of the first surface and the second surface has an avoidance department.
  • the battery core according to the embodiment of the present disclosure by arranging an escape portion on the surface of the battery core in a predetermined direction, it is possible to reduce the number of pole pieces and avoid interference with related components. Therefore, the battery core according to the embodiment of the present disclosure has the advantage of high capacity. In addition, because the number of pole pieces is not reduced, the battery core can occupy as much space as possible to accommodate the battery core, which has the advantage of improving the space utilization of the accommodation cavity. To a certain extent, the battery core can be prevented from shaking in the accommodation cavity. Improved battery cell stability.
  • the terminal device has the advantages of good structural stability of the battery core, high space utilization and high battery capacity.
  • At least some of the pole pieces among the plurality of pole pieces are provided with notches, and the notches of at least some of the pole pieces are opposite and connected to form the avoidance portion.
  • each of the positive electrode sheets and the negative electrode sheets has multiple, and the total area of the plurality of positive electrode sheets with notches is greater than the total area of the plurality of negative electrode sheets with notches.
  • the notch is provided in a central region of the pole piece.
  • the plurality of pole pieces includes an outermost pole piece, the outermost pole piece is a positive pole piece, and the notch is provided at least on the outermost pole piece.
  • the plurality of pole pieces includes an outermost pole piece located on the outermost side in the preset direction, the outermost pole piece is a negative pole piece, and the notch is provided at least on the outermost pole piece. On the pole piece and the pole piece adjacent to the outermost pole piece.
  • the notch includes a positive electrode notch and a negative electrode notch
  • the positive electrode notch is provided on at least one of the positive electrode pieces
  • the negative electrode notch is provided on at least one of the negative electrode pieces
  • the positive electrode on the at least one positive electrode piece The total cross-sectional area of the notches is greater than the total cross-sectional area of the negative electrode notches on the at least one negative electrode piece.
  • the avoidance portion is provided at the edge of the battery core, and the plurality of pole pieces includes a first group of pole pieces and a second group of pole pieces, and the width of the first group of pole pieces is smaller than that of the second group of pole pieces.
  • the width of the pole pieces, and/or the length of the first group of pole pieces is smaller than the length of the second group of pole pieces, and the avoidance portion is formed between the first group of pole pieces and the second group of pole pieces. between.
  • one end of the first set of pole pieces in the width direction and one end of the second set of pole pieces in the width direction are aligned in the preset direction.
  • the first set of pole pieces has a first pole piece adjacent to the second set of pole pieces, and the second set of pole pieces has a third pole piece adjacent to the first set of pole pieces.
  • Two pole pieces, each of the first pole piece and the second pole piece is a single-sided positive pole piece; or the first pole piece is a double-sided positive pole piece, and the second pole piece is a double-sided positive pole piece. Negative plate.
  • the second electrode sheet is the double-sided negative electrode sheet
  • the double-sided negative electrode sheet includes a foil layer and a first active layer and a second active layer disposed on both sides of the foil layer, and the first The active layer is connected to the positive electrode piece of the first group of pole pieces, and the area of the first active layer is equal to the area of the first pole piece.
  • the battery according to the embodiment of the present disclosure includes the battery cell described in any of the above embodiments.
  • a terminal device includes the battery of the above embodiment.
  • Figure 1 is a perspective view of a battery core according to an embodiment of the present disclosure.
  • Figure 2 is an exploded view of Figure 1.
  • FIG. 3 is another exploded view of FIG. 1 .
  • Figure 4 is a perspective view of a battery core according to another embodiment of the present disclosure.
  • Figure 5 is a perspective view of a battery core according to yet another embodiment of the present disclosure.
  • Figure 6 is a cross-sectional view of two positive electrode sheets of the present disclosure.
  • Figure 7 is a cross-sectional view of a double-sided negative electrode sheet of the present disclosure.
  • Figure 8 is a cross-sectional view of another double-sided negative electrode sheet of the present disclosure.
  • the following describes the battery core 100 of the embodiment of the present disclosure, the battery and terminal equipment having the battery core 100 with reference to FIGS. 1 to 8 .
  • the terminal device includes an accommodation cavity, a battery core 100 and a battery chip.
  • the battery core 100 and the battery chip are both arranged in the accommodation cavity.
  • the battery core 100 includes a plurality of pole pieces, and the plurality of pole pieces are stacked along a preset direction (for example, the up and down direction shown in Figures 1 and 2).
  • Each pole piece includes a plurality of positive pole pieces 1 and a plurality of negative pole pieces 2.
  • the positive pole pieces 1 and the negative pole pieces 2 are alternately arranged in a preset direction.
  • the battery core 100 has a first surface 11 and a second surface that are oppositely arranged in the preset direction. 12. At least one of the first surface 11 and the second surface 12 has an escape portion 3 .
  • the escape portion 3 can be provided on the first surface 11
  • the escape portion 3 can be provided on the second surface 12
  • the escape portion 3 can also be provided on the first surface 11 and the second surface 12 .
  • the battery chip and the escape part 3 are adapted to the battery chip in terms of space and size.
  • the surface of the battery core 100 in the thickness direction is all flat, and there is installation interference between the relevant components (battery chips) and the battery core 100 in the area where the terminal equipment is used to place the battery core 100 .
  • the overall thickness of the battery is usually reduced by reducing the number of pole pieces to avoid interference between the battery core 100 and related components.
  • reducing the number of pole pieces has the disadvantages of low battery capacity and low space utilization of the corresponding terminal equipment. question.
  • the terminal equipment of the embodiment of the present disclosure by arranging the escape portion 3 on the surface of the battery core 100 in the preset direction, the number of pole pieces can be reduced and interference with related components can be avoided. Therefore, the terminal device of the embodiment of the present disclosure has the advantage of high capacity. In addition, because the number of pole pieces is not reduced, the battery core can occupy as much space as possible to accommodate the battery core, which has the advantage of improving the space utilization of the accommodation cavity. And to a certain extent, the battery core 100 can be prevented from shaking in the accommodation cavity, thereby improving the stability of the battery core 100 .
  • the terminal device has the advantages of improving space utilization, battery capacity, and stability of the battery cell 100 .
  • At least some of the pole pieces among the plurality of pole pieces are provided with notches, and the notches of at least some of the pole pieces are opposite and connected to form an escape portion 3 .
  • one pole piece located at the end may have a notch, or two or more pole pieces may have notches.
  • the depth of the escape portion 3 in a preset direction is determined according to the number of pole pieces with notches.
  • the shape of the notch can be rectangular or square.
  • the shape of the notch can also be set according to the peripheral contour of the components that need to be avoided.
  • each of the positive electrode sheets 1 and the negative electrode sheets 2 has a plurality of gaps, and the total area of the plurality of positive electrode sheets 1 with notches is greater than the total area of the plurality of negative electrode sheets 2 with gaps.
  • the ions transferred by the positive electrode sheet 1 can be further improved to provide sufficient carrying space.
  • the notch is provided in the middle area of the pole piece so that the battery core 100 has a recessed portion 31 .
  • the escape part 3 is provided in the middle area of the battery core 100 .
  • the notch is essentially a hollow hole 4 formed on the corresponding pole piece, and the relief portion 3 is a recessed portion 31 formed by inwardly recessing the middle area of the surface of the battery core 100 .
  • corresponding notches are provided on some pole pieces, and the notches are opposite and connected to form an escape part 3.
  • the depth and size of the escape part 3 in the preset direction can be set according to the position of the relevant components, and according to The space occupied by the relevant components (battery chips) in the preset direction sets the number of pole pieces with notches, which has the advantages of high flexibility, convenient production and simple structure.
  • the plurality of pole pieces include an outermost pole piece, and the outermost pole piece is a positive pole piece 1, and the gap is at least provided on the outermost pole piece.
  • the number of positive electrode sheets 1 with notches is greater than or equal to the number of negative electrode sheets 2 with notches.
  • the escape portion 3 is provided on the first surface 11 or the second surface 12 of the battery core 100 , and the escape portion 3 moves from the first surface 11 of the battery core 100 toward the second surface of the battery core 100 along a preset direction. 12 extends, the electrode piece at one end of the battery core 100 having the first surface 11 is the positive electrode piece 1 , and the escape portion 3 at least penetrates the positive electrode piece 1 .
  • the positive electrode sheet 1 with the notch, the negative electrode sheet 2 with the notch, the positive electrode sheet 1 with the notch, and the negative electrode sheet 2 with the notch are alternated in sequence until the size of the formed escape portion 3 in the preset direction is consistent with the corresponding element.
  • the device has no installation interference.
  • the number of positive electrode pieces and negative electrode pieces with notches can be the same, or the numbers of positive electrode pieces and negative electrode pieces with notches can be different. It can be arbitrarily stacked according to the size of the accommodation cavity in the preset direction, which has the advantage of flexible stacking.
  • the battery core 100 includes seven electrode pieces, which are, from top to bottom, a first positive electrode piece, a first negative electrode piece, a second positive electrode piece, a second negative electrode piece, a third positive electrode piece, and a third negative electrode. film, the fourth positive electrode film. Only the first positive electrode piece may have a notch, or both the first positive electrode piece and the first negative electrode piece may have notches.
  • the plurality of pole pieces include the outermost pole piece located on the outermost side in the preset direction.
  • the outermost pole piece is a negative pole piece 2, and the gap is at least set between the outermost pole piece and the outermost pole piece.
  • the number of positive electrode sheets 1 with notches is equal to the number of negative electrode sheets 2 with notches.
  • the notch includes a positive electrode notch and a negative electrode notch.
  • the positive electrode notch is provided on at least one positive electrode piece 1
  • the negative electrode notch is provided on at least one negative electrode piece 2.
  • the total number of positive electrode notches on at least one positive electrode piece 1 is The cross-section is larger than the total cross-sectional area of the negative electrode notch on at least one negative electrode sheet 2 . It can be understood that the multiple positive electrode notches and negative electrode notches form the escape portion 3 .
  • the total cross-sectional area of the positive electrode notch on at least one positive electrode piece 1 is larger than the total cross-sectional area of the negative electrode notch on at least one negative electrode piece 2 . It can further improve the ions transferred by the positive electrode sheet 1 to provide sufficient carrying space.
  • a terminal device includes a housing cell 100 and a curved screen.
  • the casing has an accommodating cavity, the battery core 100 is arranged in the accommodating cavity, and the curved screen covers the portion of the casing that has the accommodating cavity.
  • the first set of pole pieces is stacked on the upper end of the second set of pole pieces.
  • the width of the first set of pole pieces is less than the width of the second set of pole pieces, or the length of the first set of pole pieces is less than the length of the second set of pole pieces, or the width and length of the first set of pole pieces is shorter than the second set of pole pieces.
  • Piece width for example, the front-to-back direction as shown in Figure 4
  • length for example, the left-to-right direction as shown in Figure 4
  • the escape portion 3 is formed between the first group of pole pieces and the second group of pole pieces, and a part of the curved screen extends into the escape portion 3 .
  • the first set of pole pieces and the second set of pole pieces are stacked along a preset direction, a step portion 32 is formed between the first set of pole pieces and the second set of pole pieces, and a part of the curved screen extends into the accommodation cavity. , and abuts on the step portion 32 .
  • Steps may be formed on all sides between the first set of pole pieces and the second set of pole pieces, or a step may be formed on one side between the first set of pole pieces and the second set of pole pieces.
  • the terminal equipment of the embodiment of the present disclosure by arranging the escape portion 3 on the surface of the battery core 100 in the preset direction, the number of pole pieces can be reduced and interference with related components can be avoided. Therefore, the terminal device of the embodiment of the present disclosure has the advantage of high capacity. In addition, because the number of pole pieces is not reduced, the space utilization of the accommodation cavity is improved, which can prevent the battery core 100 from shaking in the accommodation cavity to a certain extent, and improves the stability of the battery core 100 .
  • the terminal device has the advantages of improving space utilization, battery capacity, and stability of the battery cell 100 .
  • one end of the first set of pole pieces in the width direction is aligned with one end of the second set of pole pieces in the width direction in a preset direction.
  • the other end of the first set of pole pieces in the width direction and the other end of the second set of pole pieces in the width direction form a step portion 32 in a predetermined direction.
  • the terminal equipment of the embodiment of the present disclosure has the advantage of facilitating the stacking of pole pieces by aligning one end of the first set of pole pieces in the width direction with one end of the second set of pole pieces in the width direction in a preset direction.
  • the installation convenience of terminal equipment equipped with the battery core 100 can be improved.
  • the first set of pole pieces has a first pole piece adjacent to the second set of pole pieces
  • the second set of pole pieces has a second pole piece adjacent to the first set of pole pieces
  • Each of the and the second pole piece is a single-sided positive pole piece.
  • the first pole piece of the first set of pole pieces is connected to the second pole piece of the second set of pole pieces.
  • the double-sided negative electrode sheet includes a layer of isolation film and negative electrode active layers coated on both sides of the isolation film
  • the double-sided positive electrode sheet includes a layer of isolation film and positive electrodes coated on both sides of the isolation film. active layer.
  • the terminal equipment of the embodiments of the present disclosure is not limited to this.
  • the first group of pole pieces has first pole pieces adjacent to the second group of pole pieces
  • the second group of pole pieces has adjacent pole pieces to the first group of pole pieces.
  • the second pole piece is adjacent to the pole piece.
  • the first pole piece is a double-sided positive pole piece, for example, as shown in Figures 7 and 8, and the second pole piece is a double-sided negative pole piece.
  • the first pole piece is a double-sided positive pole piece
  • the second pole piece is a double-sided negative pole piece
  • a single-sided positive pole piece is provided relative to both the first pole piece and the second pole piece.
  • the thickness of the two-layer single-sided positive electrode sheet is equal to the thickness of the two layers of isolation film plus the thickness of the two layers of active layers.
  • the two-layer single-sided positive electrode sheet H1 is equal to the thickness H2 of the two two-layer active layers plus the two isolation films H3, that is, H1 is equal to 2H2+2H3, and the thickness of the double-sided positive electrode sheet is equal to one layer.
  • the terminal device of the embodiment of the present disclosure has the advantage of further saving space. Therefore, when the accommodation cavity space is certain, the terminal device of the embodiment of the present disclosure has the advantage of large capacity of the battery core 100 .
  • the second pole piece is a double-sided negative pole piece 2.
  • the double-sided negative pole piece 2 includes a foil layer and a first active layer and a second active layer disposed on both sides of the foil layer.
  • the first active layer Connected to the positive electrode piece 1 of the first group of electrode pieces, the area of the first active layer is equal to the area of the first electrode piece.
  • the first pole piece is a double-sided positive pole piece
  • the second pole piece is a double-sided negative pole piece.
  • the double-sided negative pole piece includes a foil layer and a first active layer and a third active layer disposed on both sides of the foil layer.
  • the second active layer is equivalent to an empty foil layer in the part where the steps are set, which has the advantage of saving space in the accommodation cavity.
  • the battery core 100 in the embodiment of the present disclosure is based on the above technical features of the battery core.
  • the battery cell 100 may be a sodium ion battery cell or a lithium ion battery cell.
  • the battery according to the embodiment of the present disclosure includes the above-mentioned battery cell 100 .
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.
  • connection In this disclosure, unless otherwise explicitly stated and limited, the terms “installation”, “connection”, “connection”, “fixing” and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be mechanically connected, electrically connected or communicable with each other; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements, Unless otherwise expressly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.
  • a first feature being “on” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features may be in indirect contact through an intermediary. touch.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • "Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
  • the terms “one embodiment,” “some embodiments,” “example,” “specific examples,” or “some examples” or the like mean that a particular feature, structure, material, or other feature is described in connection with the embodiment or example.
  • Features are included in at least one embodiment or example of the disclosure.
  • the schematic expressions of the above terms are not necessarily directed to the same embodiment or example.
  • the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
  • those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

Abstract

A battery cell, and a battery and a terminal device having the battery cell. The battery cell (100) comprises a plurality of electrode plates, the plurality of electrode plates are stacked in a preset direction, the battery cell (100) has a first surface (11) and a second surface (12) which are oppositely provided in the preset direction, and at least one of the first surface (11) and the second surface (12) is provided with a relief portion (3), so that the space utilization rate of the terminal device, the capacity of the battery, and the stability of the battery cell are improved.

Description

电芯、电池和终端设备Cells, batteries and terminal equipment 技术领域Technical field
本公开涉及电池技术领域，具体涉及一种电芯和具有该电芯的电池及终端设备。The present disclosure relates to the field of battery technology, and in particular to a battery core, a battery and terminal equipment having the battery core.
背景技术Background technique
相关技术中，电芯厚度方向的表面均是均为平整面，终端设备用于放置电芯的部位具有相关的元器件与电芯之间存在安装干涉。通常通过缩减极片的数量的方式来降低电池的整体厚度以避免电芯与相关元器件之间的干涉，但是减少极片的数量会降低电池容量，而终端设备存在容置腔的空间利用率低的问题。In the related art, the surfaces in the thickness direction of the battery core are all flat surfaces, and there is installation interference between the relevant components and the battery core in the area where the terminal equipment is used to place the battery core. The overall thickness of the battery is usually reduced by reducing the number of pole pieces to avoid interference between the battery core and related components. However, reducing the number of pole pieces will reduce the battery capacity, and the terminal equipment has space utilization of the accommodation cavity. low question.
发明内容Contents of the invention
本公开旨在至少在一定程度上解决相关技术中的技术问题之一。为此，本公开的实施例提供一种电芯。该电芯具有电池容量及空间利用率高的优点。The present disclosure aims to solve one of the technical problems in the related art, at least to a certain extent. To this end, embodiments of the present disclosure provide a battery core. This battery cell has the advantages of high battery capacity and space utilization.
本公开的实施例还提供一种电池。Embodiments of the present disclosure also provide a battery.
本公开的实施例还提供一种终端设备。An embodiment of the present disclosure also provides a terminal device.
本公开实施例的电芯，包括多个极片，多个所述极片沿预设方向层叠设置，多个所述极片包括正极片和负极片，所述正极片和所述负极片在所述预设方向上交替布置，所述电芯具有在所述预设方向上相对设置的第一表面和第二表面，所述第一表面和所述第二表面中的至少一者具有避让部。The battery core of the embodiment of the present disclosure includes a plurality of pole pieces. The plurality of pole pieces are stacked along a preset direction. The plurality of pole pieces include a positive pole piece and a negative pole piece. The positive pole piece and the negative pole piece are in Alternately arranged in the preset direction, the battery cores have first surfaces and second surfaces oppositely arranged in the preset direction, and at least one of the first surface and the second surface has an avoidance department.
本公开实施例的电芯，通过在电芯的预设方向的表面设置避让部，可以缩减极片数量的基础上避免与相关的元器件之间的干涉。因此，本公开实施例的电芯具有容量高的优点。此外，因没有减少极片数量，电芯可以尽可能的占用容纳电芯的空间，具有提升容置腔的空间利用率的优点，在一定程度上可以避免电芯在容置腔内出现晃动，提升了电芯的稳定性。In the battery core according to the embodiment of the present disclosure, by arranging an escape portion on the surface of the battery core in a predetermined direction, it is possible to reduce the number of pole pieces and avoid interference with related components. Therefore, the battery core according to the embodiment of the present disclosure has the advantage of high capacity. In addition, because the number of pole pieces is not reduced, the battery core can occupy as much space as possible to accommodate the battery core, which has the advantage of improving the space utilization of the accommodation cavity. To a certain extent, the battery core can be prevented from shaking in the accommodation cavity. Improved battery cell stability.
因此，本公开实施例的终端设备具有电芯的结构的稳定性好、空间利用率和电池的容量高的优点。Therefore, the terminal device according to the embodiment of the present disclosure has the advantages of good structural stability of the battery core, high space utilization and high battery capacity.
在一些实施例中，多个极片中的至少部分极片设有缺口，所述至少部分极片的所述缺口相对且连通以形成所述避让部。In some embodiments, at least some of the pole pieces among the plurality of pole pieces are provided with notches, and the notches of at least some of the pole pieces are opposite and connected to form the avoidance portion.
在一些实施例中，所述正极片和所述负极片中的每一者均具有多个，多个所述正极片具有缺口的总面积大于多个所述负极片具有缺口的总面积。In some embodiments, each of the positive electrode sheets and the negative electrode sheets has multiple, and the total area of the plurality of positive electrode sheets with notches is greater than the total area of the plurality of negative electrode sheets with notches.
在一些实施例中，所述缺口设在所述极片的中部区域。In some embodiments, the notch is provided in a central region of the pole piece.
在一些实施例中，多个所述极片包括最外侧极片，所述最外侧极片为一个正极片，所 述缺口至少设在所述最外侧极片上。In some embodiments, the plurality of pole pieces includes an outermost pole piece, the outermost pole piece is a positive pole piece, and the notch is provided at least on the outermost pole piece.
在一些实施例中，多个所述极片包括在所述预设方向上位于最外侧的最外侧极片，所述最外侧极片为一个负极片，所述缺口至少设在所述最外侧极片和与所述最外侧极片相邻的极片上。In some embodiments, the plurality of pole pieces includes an outermost pole piece located on the outermost side in the preset direction, the outermost pole piece is a negative pole piece, and the notch is provided at least on the outermost pole piece. On the pole piece and the pole piece adjacent to the outermost pole piece.
在一些实施例中，所述缺口包括正极缺口和负极缺口，所述正极缺口设在至少一个所述正极片上，所述负极缺口设在至少一个所述负极片上，所述至少一个正极片上的正极缺口的总横截面大于所述至少一个负极片上的负极缺口的总横截面积。In some embodiments, the notch includes a positive electrode notch and a negative electrode notch, the positive electrode notch is provided on at least one of the positive electrode pieces, the negative electrode notch is provided on at least one of the negative electrode pieces, and the positive electrode on the at least one positive electrode piece The total cross-sectional area of the notches is greater than the total cross-sectional area of the negative electrode notches on the at least one negative electrode piece.
在一些实施例中，所述避让部设置在电芯边缘，多个所述极片包括第一组极片和第二组极片，所述第一组极片的宽度小于所述第二组极片的宽度，和/或，所述第一组极片的长度小于所述第二组极片的长度，所述避让部形成在所述第一组极片和所述第二组极片之间。In some embodiments, the avoidance portion is provided at the edge of the battery core, and the plurality of pole pieces includes a first group of pole pieces and a second group of pole pieces, and the width of the first group of pole pieces is smaller than that of the second group of pole pieces. The width of the pole pieces, and/or the length of the first group of pole pieces is smaller than the length of the second group of pole pieces, and the avoidance portion is formed between the first group of pole pieces and the second group of pole pieces. between.
在一些实施例中，所述第一组极片在其宽度方向上的一端与所述第二组极片在其宽度方向上的一端在所述预设方向上对齐。In some embodiments, one end of the first set of pole pieces in the width direction and one end of the second set of pole pieces in the width direction are aligned in the preset direction.
在一些实施例中，所述第一组极片具有与所述第二组极片相邻的第一极片，所述第二组极片具有与所述第一组极片相邻的第二极片，所述第一极片和所述第二极片中的每一者为单面正极片；或者，所述第一极片为双面正极片，所述第二极片为双面负极片。In some embodiments, the first set of pole pieces has a first pole piece adjacent to the second set of pole pieces, and the second set of pole pieces has a third pole piece adjacent to the first set of pole pieces. Two pole pieces, each of the first pole piece and the second pole piece is a single-sided positive pole piece; or the first pole piece is a double-sided positive pole piece, and the second pole piece is a double-sided positive pole piece. Negative plate.
在一些实施例中，第二极片为所述双面负极片，所述双面负极片包括箔层和设置所述箔层两侧的第一活性层和第二活性层，所述第一活性层与所述第一组极片的正极片相连，所述第一活性层的面积等于所述第一极片的面积。In some embodiments, the second electrode sheet is the double-sided negative electrode sheet, and the double-sided negative electrode sheet includes a foil layer and a first active layer and a second active layer disposed on both sides of the foil layer, and the first The active layer is connected to the positive electrode piece of the first group of pole pieces, and the area of the first active layer is equal to the area of the first pole piece.
本公开实施例的电池，包括上述中任一实施例所述的电芯。The battery according to the embodiment of the present disclosure includes the battery cell described in any of the above embodiments.
本公开实施例终端设备，包括上述实施例的电池。A terminal device according to an embodiment of the present disclosure includes the battery of the above embodiment.
附图说明Description of the drawings
图1是本公开一个实施例的电芯的立体图。Figure 1 is a perspective view of a battery core according to an embodiment of the present disclosure.
图2是图1的***图。Figure 2 is an exploded view of Figure 1.
图3是图1的另一***图。FIG. 3 is another exploded view of FIG. 1 .
图4是本公开另一个实施例的电芯的立体图。Figure 4 is a perspective view of a battery core according to another embodiment of the present disclosure.
图5是本公开再一个实施例的电芯的立体图。Figure 5 is a perspective view of a battery core according to yet another embodiment of the present disclosure.
图6是本公开两个正极片的剖视图。Figure 6 is a cross-sectional view of two positive electrode sheets of the present disclosure.
图7是本公开一个双面负极片的剖视图。Figure 7 is a cross-sectional view of a double-sided negative electrode sheet of the present disclosure.
图8是本公开另一个双面负极片的剖视图。Figure 8 is a cross-sectional view of another double-sided negative electrode sheet of the present disclosure.
附图标记：Reference signs:
电芯100； Batteries 100;
正极片1；负极片2；避让部3；凹陷部31；台阶部32；镂空孔4；Positive electrode piece 1; negative electrode piece 2; avoidance part 3; recessed part 31; step part 32; hollow hole 4;
第一表面11；第二表面12。 First surface 11; second surface 12.
具体实施方式Detailed ways
下面详细描述本公开的实施例，所述实施例的示例在附图中示出。下面通过参考附图描述的实施例是示例性的，旨在用于解释本公开，而不能理解为对本公开的限制。The embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present disclosure and are not to be construed as limitations of the present disclosure.
下面参考图1-图8描述本公开实施例的电芯100和具有该电芯100的电池及终端设备。The following describes the battery core 100 of the embodiment of the present disclosure, the battery and terminal equipment having the battery core 100 with reference to FIGS. 1 to 8 .
本公开实施例的终端设备，包括容置腔、电芯100和电池芯片。The terminal device according to the embodiment of the present disclosure includes an accommodation cavity, a battery core 100 and a battery chip.
电芯100和电池芯片均设置在容置腔内，电芯100包括多个极片，多个极片沿预设方向(例如，图1和图2中所示的上下方向)层叠设置，多个极片包括多个正极片1和多个负极片2，正极片1和负极片2预设方向上交替布置，电芯100具有在预设方向上相对设置的第一表面11和第二表面12，第一表面11和第二表面12中的至少一者具有避让部3。换言之，避让部3可以设置在第一表面11上，避让部3可以设置在第二表面12上，避让部3还可以设置在第一表面11和第二表面12上。电池芯片与避让部3在空间和尺寸上与电池芯片相适配。The battery core 100 and the battery chip are both arranged in the accommodation cavity. The battery core 100 includes a plurality of pole pieces, and the plurality of pole pieces are stacked along a preset direction (for example, the up and down direction shown in Figures 1 and 2). Each pole piece includes a plurality of positive pole pieces 1 and a plurality of negative pole pieces 2. The positive pole pieces 1 and the negative pole pieces 2 are alternately arranged in a preset direction. The battery core 100 has a first surface 11 and a second surface that are oppositely arranged in the preset direction. 12. At least one of the first surface 11 and the second surface 12 has an escape portion 3 . In other words, the escape portion 3 can be provided on the first surface 11 , the escape portion 3 can be provided on the second surface 12 , and the escape portion 3 can also be provided on the first surface 11 and the second surface 12 . The battery chip and the escape part 3 are adapted to the battery chip in terms of space and size.
相关技术中，电芯100厚度方向的表面均是均为平整面，终端设备用于放置电芯100的部位具有相关的元器件(电池芯片)与电芯100之间存在安装干涉。通常通过缩减极片的数量的方式来降低电池的整体厚度，以避免电芯100与相关元器件之间的干涉，但减少极片的数量存在电池容量低和相应的终端设备空间利用率低的问题。In the related art, the surface of the battery core 100 in the thickness direction is all flat, and there is installation interference between the relevant components (battery chips) and the battery core 100 in the area where the terminal equipment is used to place the battery core 100 . The overall thickness of the battery is usually reduced by reducing the number of pole pieces to avoid interference between the battery core 100 and related components. However, reducing the number of pole pieces has the disadvantages of low battery capacity and low space utilization of the corresponding terminal equipment. question.
本公开实施例的终端设备，通过在电芯100的预设方向的表面设置避让部3，可以缩减极片数量的基础上避免与相关的元器件之间的干涉。因此，本公开实施例的终端设备具有容量高的优点。此外，因并未减少极片数量，电芯可以尽可能的占用容纳电芯的空间，具有提升容置腔的空间利用率的优点。且在一定程度上可以避免电芯100在容置腔内出现晃动，提升了电芯100的稳定性。In the terminal equipment of the embodiment of the present disclosure, by arranging the escape portion 3 on the surface of the battery core 100 in the preset direction, the number of pole pieces can be reduced and interference with related components can be avoided. Therefore, the terminal device of the embodiment of the present disclosure has the advantage of high capacity. In addition, because the number of pole pieces is not reduced, the battery core can occupy as much space as possible to accommodate the battery core, which has the advantage of improving the space utilization of the accommodation cavity. And to a certain extent, the battery core 100 can be prevented from shaking in the accommodation cavity, thereby improving the stability of the battery core 100 .
因此，本公开实施例的终端设备具有提升空间利用率、电池的容量及电芯100的稳定性的优点。Therefore, the terminal device according to the embodiment of the present disclosure has the advantages of improving space utilization, battery capacity, and stability of the battery cell 100 .
如图1和图4所示，多个极片中的至少部分极片设有缺口，至少部分极片的缺口相对且连通以形成避让部3。换言之，可以是一个位于端部的极片上具有缺口，也可以是二个或者以上的极片上具有缺口。避让部3在预设方向的深度(例如，图1中所示的上下方向)是根据具有缺口的极片的数量决定的。As shown in FIGS. 1 and 4 , at least some of the pole pieces among the plurality of pole pieces are provided with notches, and the notches of at least some of the pole pieces are opposite and connected to form an escape portion 3 . In other words, one pole piece located at the end may have a notch, or two or more pole pieces may have notches. The depth of the escape portion 3 in a preset direction (for example, the up and down direction shown in FIG. 1 ) is determined according to the number of pole pieces with notches.
可选地，该缺口形状可以为长方形或者正方形。缺口的形状还可以根据需要避让的元器件的外周轮廓进行设置。Optionally, the shape of the notch can be rectangular or square. The shape of the notch can also be set according to the peripheral contour of the components that need to be avoided.
如图1和图4所示，正极片1和负极片2中的每一者均具有多个，多个正极片1具有缺口的总面积大于多个负极片2具有缺口的总面积。由此，可以进一步提升正极片1转移的离子提供充足的承载空间。As shown in FIGS. 1 and 4 , each of the positive electrode sheets 1 and the negative electrode sheets 2 has a plurality of gaps, and the total area of the plurality of positive electrode sheets 1 with notches is greater than the total area of the plurality of negative electrode sheets 2 with gaps. As a result, the ions transferred by the positive electrode sheet 1 can be further improved to provide sufficient carrying space.
具体地，如图1和图2所示，缺口设在极片的中部区域以使电芯100具有凹陷部31。 换言之，避让部3设置在电芯100的中部区域。缺口实质上是形成在对应极片上的镂空孔4，该避让部3为电芯100的表面的中部的区域向内凹陷形成该凹陷部31。Specifically, as shown in FIGS. 1 and 2 , the notch is provided in the middle area of the pole piece so that the battery core 100 has a recessed portion 31 . In other words, the escape part 3 is provided in the middle area of the battery core 100 . The notch is essentially a hollow hole 4 formed on the corresponding pole piece, and the relief portion 3 is a recessed portion 31 formed by inwardly recessing the middle area of the surface of the battery core 100 .
本公开实施例的终端设备，通过在部分极片设有相应的缺口，缺口相对且连通以形成避让部3，避让部3在预设方向的深度和大小可以根据相关元器件位置开设，并根据相关元器件(电池芯片)在预设方向所占用的空间设定开设缺口的极片个数，具有灵活程度高、制作方便和结构简单的优点。In the terminal equipment of the embodiment of the present disclosure, corresponding notches are provided on some pole pieces, and the notches are opposite and connected to form an escape part 3. The depth and size of the escape part 3 in the preset direction can be set according to the position of the relevant components, and according to The space occupied by the relevant components (battery chips) in the preset direction sets the number of pole pieces with notches, which has the advantages of high flexibility, convenient production and simple structure.
如图2和图3所示，多个极片包括最外侧极片，最外侧极片为一个正极片1，缺口至少设在最外侧极片上。换言之，具有缺口的正极片1的数量大于等于具有缺口的负极片2的数量。可以理解的是，避让部3设置在电芯100的第一表面11或者第二表面12，避让部3从电芯100的第一表面11沿着预设方向朝着电芯100的第二表面12延伸，电芯100具有第一表面11的一端的极片为正极片1，避让部3至少贯穿该正极片1。As shown in Figures 2 and 3, the plurality of pole pieces include an outermost pole piece, and the outermost pole piece is a positive pole piece 1, and the gap is at least provided on the outermost pole piece. In other words, the number of positive electrode sheets 1 with notches is greater than or equal to the number of negative electrode sheets 2 with notches. It can be understood that the escape portion 3 is provided on the first surface 11 or the second surface 12 of the battery core 100 , and the escape portion 3 moves from the first surface 11 of the battery core 100 toward the second surface of the battery core 100 along a preset direction. 12 extends, the electrode piece at one end of the battery core 100 having the first surface 11 is the positive electrode piece 1 , and the escape portion 3 at least penetrates the positive electrode piece 1 .
具体地，具有缺口的正极片1、具有缺口的负极片2、具有缺口的正极片1、具有缺口的负极片2依次交替，直至使形成的避让部3在预设方向的尺寸与相应的元器件无安装干涉。可以使具有缺口的正极片和负极片的数量相同，也可以具有缺口的正极片和负极片的数量不同。可以根据容置腔在预设方向的大小任意层叠，具有叠放灵活的优点。Specifically, the positive electrode sheet 1 with the notch, the negative electrode sheet 2 with the notch, the positive electrode sheet 1 with the notch, and the negative electrode sheet 2 with the notch are alternated in sequence until the size of the formed escape portion 3 in the preset direction is consistent with the corresponding element. The device has no installation interference. The number of positive electrode pieces and negative electrode pieces with notches can be the same, or the numbers of positive electrode pieces and negative electrode pieces with notches can be different. It can be arbitrarily stacked according to the size of the accommodation cavity in the preset direction, which has the advantage of flexible stacking.
例如，图2中，电芯100包括七个极片，由上而下依次分别为第一正极片、第一负极片、第二正极片、第二负极片、第三正极片、第三负极片、第四正极片。可以仅使第一正极片具有缺口，也可以使第一正极片和第一负极片上均具有缺口。For example, in Figure 2, the battery core 100 includes seven electrode pieces, which are, from top to bottom, a first positive electrode piece, a first negative electrode piece, a second positive electrode piece, a second negative electrode piece, a third positive electrode piece, and a third negative electrode. film, the fourth positive electrode film. Only the first positive electrode piece may have a notch, or both the first positive electrode piece and the first negative electrode piece may have notches.
如图1和图3所示，多个极片包括在预设方向上位于最外侧的最外侧极片，最外侧极片为一个负极片2，缺口至少设在最外侧极片和与最外侧极片相邻的极片上。换言之，具有缺口的正极片1的数量等于具有缺口的负极片2的数量。以满足负极有足够的空间承载正极片1转移的离子，保证电芯100正常的充放电。As shown in Figures 1 and 3, the plurality of pole pieces include the outermost pole piece located on the outermost side in the preset direction. The outermost pole piece is a negative pole piece 2, and the gap is at least set between the outermost pole piece and the outermost pole piece. On the pole piece adjacent to the pole piece. In other words, the number of positive electrode sheets 1 with notches is equal to the number of negative electrode sheets 2 with notches. In order to ensure that the negative electrode has enough space to carry the ions transferred by the positive electrode piece 1, the normal charging and discharging of the battery core 100 is ensured.
如图1和图3所示，缺口包括正极缺口和负极缺口，正极缺口设在至少一个正极片1上，负极缺口设在至少一个负极片2上，至少一个正极片1上的正极缺口的总横截面大于至少一个负极片2上的负极缺口的总横截面积。可以理解的是，多个正极缺口和负极缺口形成避让部3。As shown in Figures 1 and 3, the notch includes a positive electrode notch and a negative electrode notch. The positive electrode notch is provided on at least one positive electrode piece 1, and the negative electrode notch is provided on at least one negative electrode piece 2. The total number of positive electrode notches on at least one positive electrode piece 1 is The cross-section is larger than the total cross-sectional area of the negative electrode notch on at least one negative electrode sheet 2 . It can be understood that the multiple positive electrode notches and negative electrode notches form the escape portion 3 .
本公开实施例的终端设备，通过将至少一个正极片1上的正极缺口的总横截面大于至少一个负极片2上的负极缺口的总横截面积。可以进一步提升正极片1转移的离子提供充足的承载空间。In the terminal equipment of the embodiment of the present disclosure, the total cross-sectional area of the positive electrode notch on at least one positive electrode piece 1 is larger than the total cross-sectional area of the negative electrode notch on at least one negative electrode piece 2 . It can further improve the ions transferred by the positive electrode sheet 1 to provide sufficient carrying space.
在本公开另一实施例的终端设备，包括壳体电芯100和曲面屏。壳体具有容置腔、电芯100设置在容置腔内，曲面屏覆盖在壳体具有容置腔部分。A terminal device according to another embodiment of the present disclosure includes a housing cell 100 and a curved screen. The casing has an accommodating cavity, the battery core 100 is arranged in the accommodating cavity, and the curved screen covers the portion of the casing that has the accommodating cavity.
如图4所示，第一组极片叠放在第二组极片的上端。第一组极片的宽度小于第二组极片宽度，或者，第一组极片的长度小于第二组极片的长度，或者是，第一组极片的宽度及长度小于第二组极片宽度(例如，图4所示的前后方向)和长度(例如，图4所示的左右 方向)。避让部3形成在第一组极片和第二组极片之间，曲面屏的一部分伸入避让部3内。As shown in Figure 4, the first set of pole pieces is stacked on the upper end of the second set of pole pieces. The width of the first set of pole pieces is less than the width of the second set of pole pieces, or the length of the first set of pole pieces is less than the length of the second set of pole pieces, or the width and length of the first set of pole pieces is shorter than the second set of pole pieces. Piece width (for example, the front-to-back direction as shown in Figure 4) and length (for example, the left-to-right direction as shown in Figure 4). The escape portion 3 is formed between the first group of pole pieces and the second group of pole pieces, and a part of the curved screen extends into the escape portion 3 .
换言之，第一组极片和第二组极片沿着预设方向层叠设置，在第一组极片和第二组极片之间形成台阶部32，曲面屏的一部分伸入容置腔内，并抵接在台阶部32上。可以第一组极片和第二组极片之间四周均形成台阶，也可以使第一组极片和第二组极片之间的一侧形成台阶。In other words, the first set of pole pieces and the second set of pole pieces are stacked along a preset direction, a step portion 32 is formed between the first set of pole pieces and the second set of pole pieces, and a part of the curved screen extends into the accommodation cavity. , and abuts on the step portion 32 . Steps may be formed on all sides between the first set of pole pieces and the second set of pole pieces, or a step may be formed on one side between the first set of pole pieces and the second set of pole pieces.
本公开实施例的终端设备，通过在电芯100的预设方向的表面设置避让部3，可以缩减极片数量的基础上避免与相关的元器件之间的干涉。因此，本公开实施例的终端设备具有容量高的优点。此外，因为没有缩减极片数量，还提升了容置腔的空间利用率，在一定程度上可以避免电芯100在容置腔内出现晃动，提升了电芯100的稳定性。In the terminal equipment of the embodiment of the present disclosure, by arranging the escape portion 3 on the surface of the battery core 100 in the preset direction, the number of pole pieces can be reduced and interference with related components can be avoided. Therefore, the terminal device of the embodiment of the present disclosure has the advantage of high capacity. In addition, because the number of pole pieces is not reduced, the space utilization of the accommodation cavity is improved, which can prevent the battery core 100 from shaking in the accommodation cavity to a certain extent, and improves the stability of the battery core 100 .
因此，本公开实施例的终端设备具有提升空间利用率、电池的容量及电芯100的稳定性的优点。Therefore, the terminal device according to the embodiment of the present disclosure has the advantages of improving space utilization, battery capacity, and stability of the battery cell 100 .
如图4和图5所示，第一组极片在其宽度方向上的一端与第二组极片在其宽度方向上的一端在预设方向上对齐。换言之，第一组极片在其宽度方向上的另一端与第二组极片在其宽度方向上的另一端在预设方向形成台阶部32。As shown in Figures 4 and 5, one end of the first set of pole pieces in the width direction is aligned with one end of the second set of pole pieces in the width direction in a preset direction. In other words, the other end of the first set of pole pieces in the width direction and the other end of the second set of pole pieces in the width direction form a step portion 32 in a predetermined direction.
本公开实施例的终端设备，通过第一组极片在其宽度方向上的一端与第二组极片在其宽度方向上的一端在预设方向上对齐，具有方便极片的层叠的优点。此外，可以提升具有该电芯100的终端设备安装的便捷性。The terminal equipment of the embodiment of the present disclosure has the advantage of facilitating the stacking of pole pieces by aligning one end of the first set of pole pieces in the width direction with one end of the second set of pole pieces in the width direction in a preset direction. In addition, the installation convenience of terminal equipment equipped with the battery core 100 can be improved.
如图5所示，第一组极片具有与第二组极片相邻的第一极片，第二组极片具有与第一组极片相邻的第二极片，第一极片和第二极片中的每一者为单面正极片。换言之，第一组极片中的第一极片与第二组极片的第二极片相连。需要说明的是，双面负极片包括一层隔离膜和涂在该隔离膜的两侧表面的负极活性层；双面正极片包括一层隔离膜和涂在该隔离膜的两侧表面的正极活性层。As shown in Figure 5, the first set of pole pieces has a first pole piece adjacent to the second set of pole pieces, the second set of pole pieces has a second pole piece adjacent to the first set of pole pieces, and the first pole piece Each of the and the second pole piece is a single-sided positive pole piece. In other words, the first pole piece of the first set of pole pieces is connected to the second pole piece of the second set of pole pieces. It should be noted that the double-sided negative electrode sheet includes a layer of isolation film and negative electrode active layers coated on both sides of the isolation film; the double-sided positive electrode sheet includes a layer of isolation film and positive electrodes coated on both sides of the isolation film. active layer.
本公开实施例的终端设备不限于此，例如，在另一些实施例中，第一组极片具有与第二组极片相邻的第一极片，第二组极片具有与第一组极片相邻的第二极片，第一极片为双面正极片，例如图7和8所示，第二极片为双面负极片。The terminal equipment of the embodiments of the present disclosure is not limited to this. For example, in other embodiments, the first group of pole pieces has first pole pieces adjacent to the second group of pole pieces, and the second group of pole pieces has adjacent pole pieces to the first group of pole pieces. The second pole piece is adjacent to the pole piece. The first pole piece is a double-sided positive pole piece, for example, as shown in Figures 7 and 8, and the second pole piece is a double-sided negative pole piece.
本公开实施例的终端设备，通过第一极片为双面正极片，第二极片为双面负极片，相对于第一极片和第二极片均设置单面正极片方式，实质上相当于一个双面正极片，但是两层的单面正极片的厚度等于两层隔离膜的厚度加上两层活性层的厚度。例如，图6中所示的，两层单面正极片H1等于两个两层活性层的厚度H2加上两个隔离膜H3，即H1等于2H2+2H3，双面正极片的厚度等于一层隔离膜的厚度加上两层活性层的厚度，在电芯100层数相同的情况，本公开实施例的终端设备具有进一步节省空间的优点。因此，在容纳腔空间一定的情况下，本公开实施例的终端设备具有电芯100容量大的优点。In the terminal equipment of the embodiment of the present disclosure, the first pole piece is a double-sided positive pole piece, the second pole piece is a double-sided negative pole piece, and a single-sided positive pole piece is provided relative to both the first pole piece and the second pole piece. In essence, It is equivalent to a double-sided positive electrode sheet, but the thickness of the two-layer single-sided positive electrode sheet is equal to the thickness of the two layers of isolation film plus the thickness of the two layers of active layers. For example, as shown in Figure 6, the two-layer single-sided positive electrode sheet H1 is equal to the thickness H2 of the two two-layer active layers plus the two isolation films H3, that is, H1 is equal to 2H2+2H3, and the thickness of the double-sided positive electrode sheet is equal to one layer. The thickness of the isolation film plus the thickness of the two active layers, when the number of layers of the battery core 100 is the same, the terminal device of the embodiment of the present disclosure has the advantage of further saving space. Therefore, when the accommodation cavity space is certain, the terminal device of the embodiment of the present disclosure has the advantage of large capacity of the battery core 100 .
如图5和图8所示，第二极片为双面负极片2，该双面负极片2包括箔层和设置箔层两 侧的第一活性层和第二活性层，第一活性层与第一组极片的正极片1相连，第一活性层的面积等于第一极片的面积。As shown in Figures 5 and 8, the second pole piece is a double-sided negative pole piece 2. The double-sided negative pole piece 2 includes a foil layer and a first active layer and a second active layer disposed on both sides of the foil layer. The first active layer Connected to the positive electrode piece 1 of the first group of electrode pieces, the area of the first active layer is equal to the area of the first electrode piece.
本公开实施例的终端设备，通过第一极片为双面正极片，第二极片为双面负极片，该双面负极片包括箔层和设置箔层两侧的第一活性层和第二活性层，相当于在设置台阶的部分为空箔层，具有节省容置腔内的空间的优点。In the terminal device of the embodiment of the present disclosure, the first pole piece is a double-sided positive pole piece, and the second pole piece is a double-sided negative pole piece. The double-sided negative pole piece includes a foil layer and a first active layer and a third active layer disposed on both sides of the foil layer. The second active layer is equivalent to an empty foil layer in the part where the steps are set, which has the advantage of saving space in the accommodation cavity.
本公开实施例的电芯100，根据上述的电芯的技术特征。The battery core 100 in the embodiment of the present disclosure is based on the above technical features of the battery core.
可选地，电芯100可以为钠离子电芯或锂离子电芯。Alternatively, the battery cell 100 may be a sodium ion battery cell or a lithium ion battery cell.
本公开实施例的电池，包括上述的电芯100。The battery according to the embodiment of the present disclosure includes the above-mentioned battery cell 100 .
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“纵向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Vertical", " The orientation or positional relationship indicated by "radial direction", "circumferential direction", etc. are based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must be Has a specific orientation, is constructed and operates in a specific orientation and therefore is not to be construed as limiting the disclosure.
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本公开的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.
在本公开中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接或彼此可通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本公开中的具体含义。In this disclosure, unless otherwise explicitly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be mechanically connected, electrically connected or communicable with each other; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements, Unless otherwise expressly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.
在本公开中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。In this disclosure, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features may be in indirect contact through an intermediary. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
在本公开中，术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的 是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific examples," or "some examples" or the like mean that a particular feature, structure, material, or other feature is described in connection with the embodiment or example. Features are included in at least one embodiment or example of the disclosure. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.
尽管已经示出和描述了上述实施例，可以理解的是，上述实施例是示例性的，不能理解为对本公开的限制，本领域普通技术人员对上述实施例进行的变化、修改、替换和变型均在本公开的保护范围内。Although the above embodiments have been shown and described, it can be understood that the above embodiments are illustrative and should not be construed as limitations of the present disclosure. Changes, modifications, substitutions and modifications of the above embodiments may be made by those of ordinary skill in the art. All are within the protection scope of this disclosure.

Claims (13)

  1. 一种电芯，其特征在于，包括多个极片，多个所述极片沿预设方向层叠设置，多个所述极片包括正极片和负极片，所述正极片和所述负极片在所述预设方向上交替布置，所述电芯具有在所述预设方向上相对设置的第一表面和第二表面，所述第一表面和所述第二表面中的至少一者具有避让部。An electric core, characterized in that it includes a plurality of pole pieces, a plurality of the pole pieces are stacked along a preset direction, the plurality of pole pieces include a positive pole piece and a negative pole piece, the positive pole piece and the negative pole piece Alternately arranged in the preset direction, the battery core has a first surface and a second surface oppositely arranged in the preset direction, and at least one of the first surface and the second surface has a Avoidance department.
  2. 根据权利要求1所述的电芯，其特征在于，多个极片中的至少部分极片设有缺口，所述至少部分极片的所述缺口相对且连通以形成所述避让部。The battery core according to claim 1, wherein at least some of the plurality of pole pieces are provided with notches, and the notches of at least some of the pole pieces are opposite and connected to form the escape portion.
  3. 根据权利要求2所述的电芯，其特征在于，所述正极片和所述负极片中的每一者均具有多个，多个所述正极片具有缺口的总面积大于多个所述负极片具有缺口的总面积。The battery core according to claim 2, wherein each of the positive electrode sheets and the negative electrode sheets has multiple, and the total area of the plurality of positive electrode sheets with gaps is larger than the plurality of negative electrode sheets. The total area of the slice with notches.
  4. 根据权利要求3所述的电芯，其特征在于，所述缺口设在所述极片的中部区域。The battery core according to claim 3, characterized in that the notch is provided in the middle area of the pole piece.
  5. 根据权利要求4所述的电芯，其特征在于，多个所述极片包括最外侧极片，所述最外侧极片为一个正极片，所述缺口至少设在所述最外侧极片上。The battery core according to claim 4, wherein the plurality of pole pieces includes an outermost pole piece, the outermost pole piece is a positive pole piece, and the notch is provided at least on the outermost pole piece.
  6. 根据权利要求4所述的电芯，其特征在于，多个所述极片包括在所述预设方向上位于最外侧的最外侧极片，所述最外侧极片为一个负极片，所述缺口至少设在所述最外侧极片和与所述最外侧极片相邻的极片上。The battery core according to claim 4, wherein the plurality of pole pieces includes an outermost pole piece located at the outermost side in the preset direction, and the outermost pole piece is a negative pole piece, and the The notch is provided on at least the outermost pole piece and the pole piece adjacent to the outermost pole piece.
  7. 根据权利要求6所述的电芯，其特征在于，所述缺口包括正极缺口和负极缺口，所述正极缺口设在至少一个所述正极片上，所述负极缺口设在至少一个所述负极片上，所述至少一个正极片上的正极缺口的总横截面大于所述至少一个负极片上的负极缺口的总横截面积。The battery core according to claim 6, wherein the notch includes a positive electrode notch and a negative electrode notch, the positive electrode notch is provided on at least one of the positive electrode pieces, and the negative electrode notch is provided on at least one of the negative electrode pieces, The total cross-sectional area of the positive electrode notch on the at least one positive electrode piece is greater than the total cross-sectional area of the negative electrode notch on the at least one negative electrode piece.
  8. 根据权利要求3所述的电芯，其特征在于，所述避让部设置在电芯边缘，多个所述极片包括第一组极片和第二组极片，所述第一组极片的宽度小于所述第二组极片的宽度，和/或，所述第一组极片的长度小于所述第二组极片的长度，所述避让部形成在所述第一组极片和所述第二组极片之间。The battery core according to claim 3, characterized in that the avoidance part is provided at the edge of the battery core, and the plurality of pole pieces includes a first group of pole pieces and a second group of pole pieces, and the first group of pole pieces The width is less than the width of the second set of pole pieces, and/or the length of the first set of pole pieces is less than the length of the second set of pole pieces, and the avoidance portion is formed on the first set of pole pieces. and between the second set of pole pieces.
  9. 根据权利要求8所述的电芯，其特征在于，所述第一组极片在其宽度方向上的一端与所述第二组极片在其宽度方向上的一端在所述预设方向上对齐。The battery core according to claim 8, wherein one end of the first set of pole pieces in the width direction and one end of the second set of pole pieces in the width direction are in the preset direction. Alignment.
  10. 根据权利要求8所述的电芯，其特征在于，所述第一组极片具有与所述第二组极片相邻的第一极片，所述第二组极片具有与所述第一组极片相邻的第二极片，所述第一极片和所述第二极片中的每一者为单面正极片；或者，所述第一极片为双面正极片，所述第二极片为双面负极片。The battery core according to claim 8, wherein the first set of pole pieces has a first pole piece adjacent to the second set of pole pieces, and the second set of pole pieces has a first pole piece adjacent to the second set of pole pieces. A set of adjacent second pole pieces, each of the first pole piece and the second pole piece is a single-sided positive pole piece; or the first pole piece is a double-sided positive pole piece, The second pole piece is a double-sided negative pole piece.
  11. 根据权利要求10所述的电芯，其特征在于，第二极片为所述双面负极片，所述双面负极片包括箔层和设置所述箔层两侧的第一活性层和第二活性层，所述第一活 性层与所述第一组极片的所述正极片相连，所述第一活性层的面积等于所述第一极片的面积。The battery core according to claim 10, wherein the second electrode piece is the double-sided negative electrode piece, and the double-sided negative electrode piece includes a foil layer and a first active layer and a third active layer disposed on both sides of the foil layer. Two active layers, the first active layer is connected to the positive electrode piece of the first group of pole pieces, and the area of the first active layer is equal to the area of the first pole piece.
  12. 一种电池，其特征在于，包括根据权利要求1-11中任一项所述的电芯。A battery, characterized by comprising the cell according to any one of claims 1-11.
  13. 一种终端设备，其特征在于，包括根据权利要求12所述的电池。A terminal device, characterized by comprising the battery according to claim 12.
PCT/CN2022/093700 2022-05-18 2022-05-18 Battery cell, battery, and terminal device WO2023221006A1 (en)

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