WO2022082707A1 - 电池及电子装置 - Google Patents

电池及电子装置 Download PDF

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Publication number
WO2022082707A1
WO2022082707A1 PCT/CN2020/123141 CN2020123141W WO2022082707A1 WO 2022082707 A1 WO2022082707 A1 WO 2022082707A1 CN 2020123141 W CN2020123141 W CN 2020123141W WO 2022082707 A1 WO2022082707 A1 WO 2022082707A1
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WO
WIPO (PCT)
Prior art keywords
protective layer
battery
layer
cell
thickness
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PCT/CN2020/123141
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English (en)
French (fr)
Inventor
程文强
丁宇
严坤
梁迎春
Original Assignee
宁德新能源科技有限公司
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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 CN202080033722.0A priority Critical patent/CN113841275A/zh
Priority to PCT/CN2020/123141 priority patent/WO2022082707A1/zh
Publication of WO2022082707A1 publication Critical patent/WO2022082707A1/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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present application relates to the technical field of battery manufacturing, and in particular, to a battery and an electronic device.
  • the surface of the cell is provided with a film for encapsulation, which is common in the prior art.
  • a film for encapsulation which is common in the prior art.
  • a battery provided by the present application includes a battery cell, a first protective layer and a second protective layer, wherein the first protective layer covers the battery core and is used to prevent electrolyte from flowing out of the battery core; the second protective layer covers the battery core.
  • the protective layer fully covers the first protective layer, and is used for preventing water vapor from entering the battery core from the first protective layer.
  • the battery further includes a tab, and the tab extends from the cell covered with the first protective layer and the second protective layer.
  • the first protective layer covers part of the tabs.
  • the distance from the surface of the first protective layer away from the surface of the battery core to the surface close to the battery core is the thickness of the first protective layer, and the thickness of the first protective layer ranges from 20 ⁇ m to 100 ⁇ m.
  • the first protective layer is made of a polymer material.
  • the polymer material includes at least one of polypropylene, polyethylene, and polyvinyl chloride.
  • the distance from the surface of the second protective layer away from the surface of the first protective layer to the surface close to the first protective layer is the thickness of the second protective layer.
  • the thickness ranges from 10 nm to 150 ⁇ m.
  • the second protective layer is a metal layer or a metal oxide layer.
  • the metal layer is at least one of an aluminum metal layer, a titanium metal layer, a zinc metal layer, and a chromium metal layer; the metal oxide layer is at least one of aluminum oxide, titanium dioxide, and zinc oxide. A sort of.
  • An electronic device includes a casing and a battery accommodated in the casing, wherein the battery is any one of the batteries described above.
  • a first protective layer is arranged on the battery core, and the first protective layer is used to isolate the electrolyte from flowing out of the battery core, and a second protective layer is arranged on the surface of the first protective layer.
  • the second protective layer is used to prevent water vapor from entering the cell. Therefore, water vapor cannot enter the inside of the battery cell, the battery core is protected, and the safety of the battery is improved.
  • FIG. 1 is a three-dimensional schematic diagram of a battery in an application example.
  • FIG. 2 is a cross-sectional view of the battery shown in FIG. 1 along the direction A-A.
  • FIG. 3 is a three-dimensional schematic view of a cell with a first protective layer.
  • FIG. 4 is a schematic perspective view of a second protective layer provided on the basis of FIG. 3 .
  • FIG. 5 is a schematic perspective view of an electronic device.
  • a component when a component is considered to be “connected” to another component, it can be directly connected to another component or there may be an intervening component at the same time. When a component is considered to be “set on” another component, it may be located directly on the other component or may co-exist with an intervening component.
  • the terms “top,” “bottom,” “top,” “bottom,” “left,” “right,” “front,” “back,” and similar expressions are used herein for illustrative purposes only.
  • the present application provides a battery, comprising a battery cell, a first protective layer and a second protective layer, the first protective layer wraps the battery core and is used to prevent electrolyte from flowing out of the battery core; the second protection layer The layer fully covers the first protective layer, and is used to prevent water vapor from entering the battery core from the first protective layer.
  • the battery plays the role of encapsulating the battery cell through the first protective layer, and the use of the second protective layer can prevent water vapor from entering the battery core from the first protective layer, The problem of massive gas production caused by the penetration of water vapor into the battery core can be effectively avoided, and the safety performance of the battery can be effectively improved.
  • a battery 100 includes a battery cell 10, a first protective layer 40 and a second protective layer 50.
  • the first protective layer 40 covers the battery core 10 and is used to isolate the electrolyte 20 flows out of the battery core 10 , and can also isolate external particles from entering the battery core 10 .
  • the second protective layer 50 completely covers the first protective layer 40 for preventing water vapor from permeating the first protective layer 40 and entering the cell 10 .
  • the cell 10 is a bare cell. That is, the cell 10 includes a pole piece 11 and a separator 12 , and the pole piece 11 and the separator 12 are stacked or rolled to form the bare cell 10 . Further, the pole piece 11 includes a first pole piece 111 and a second pole piece 112 , and the diaphragm 12 is located between the first pole piece 111 and the second pole piece 112 . Further, the first pole piece 111 is a positive pole piece, and the second pole piece 112 is a negative pole piece.
  • first pole piece 111 can be replaced with a negative electrode piece
  • second pole piece 112 can be replaced with a positive electrode piece
  • the battery 100 further includes a tab 30 extending from the battery cell 10 .
  • the tabs 30 are fixed to the pole pieces 11 by welding or bonding with conductive glue. It can be understood that, in other embodiments, the connection manner of the tab 30 and the pole piece 11 is not limited to this.
  • the first protective layer 40 covers the surface of the cell 10 .
  • the first protective layer 40 is made of a polymer material, and the polymer material includes at least one of polypropylene (PP), polyethylene (PE), and polyphenylene ether (PPE).
  • PP polypropylene
  • PE polyethylene
  • PPE polyphenylene ether
  • the first protective layer 40 is made of polypropylene.
  • the battery core 10 is covered with polypropylene, which not only has the function of encapsulating the battery core 10 but also has the effect of anti-corrosion.
  • the first protective layer 40 may be made of polyethylene or polyphenylene ether, and may also be made of a mixed material of polypropylene and polyethylene.
  • the specific material can be selected according to needs, and is not limited to the content described in this embodiment.
  • the first protective layer 40 can also be replaced with other materials with the same function or function.
  • the distance from the surface of the first protective layer 40 away from the surface of the cell 10 to the surface close to the cell 10 is the thickness of the first protective layer 40 . That is, referring to FIG. 2 , the stacking direction of the battery cells 10 is the thickness direction of the first protective layer 40 .
  • the thickness of the first protective layer 40 ranges from 20 ⁇ m to 100 ⁇ m.
  • the thickness of the first protective layer 40 may be 25 ⁇ m, 30 ⁇ m, 35 ⁇ m, 40 ⁇ m, 45 ⁇ m, 50 ⁇ m, 55 ⁇ m, 60 ⁇ m, 65 ⁇ m, 70 ⁇ m, 75 ⁇ m, 80 ⁇ m, 85 ⁇ m, 90 ⁇ m, and 95 ⁇ m.
  • the thickness of the first protective layer 40 between 20 ⁇ m and 100 ⁇ m can ensure the energy density of the battery 100 and avoid the decrease in the energy density of the battery 100 due to the excessive thickness of the first protective layer 40 .
  • the thickness of the first protective layer 40 when the thickness of the first protective layer 40 is set between 20 ⁇ m and 100 ⁇ m, when the first protective layer 40 is folded, it is easier to bend at a corner or a chamfered position. If the first protective layer 40 is too thin, cracks are likely to occur when the first protective layer 40 is bent. However, if the first protective layer 40 is too thick, it is inconvenient for it to be bent.
  • the first protective layer 40 is to encapsulate the cell 10 and the tabs 30 disposed on the cell 10 by using a packaging process.
  • the first protective layer 40 needs to be punched to form a dent suitable for the battery cell 10 , and the battery core 10 is put into it for packaging.
  • the encapsulation process it is necessary to inject the electrolyte 20 into the cells 10 located in the first protective layer 40 , and use the first protective layer 40 for encapsulation, and the first protective layer 40 is in contact with the electrolyte 20 . , has good corrosion resistance.
  • This packaging process is relatively common in the prior art, and the specific packaging process thereof will not be repeated here.
  • first protective layer 40 is coated on the surface of the battery core 10, and at the end where the tab 30 is connected to the battery core 10, the outer surface of the tab 30 is provided with the first protective layer 40 is made of an adhesive (not shown in the figure) with substantially the same material, the first protective layer 40 covers the adhesive, and the first protective layer 40 and the tab are tightly sealed by the adhesive. 30 connection position to prevent the electrolyte 20 from flowing out.
  • the second protective layer 50 completely covers the surface of the first protective layer 40 , and further, in FIG. 4 , the first protective layer 40 is covered with fine dots. area on the surface of the cell 10 .
  • the second protective layer 50 uses slanted lines to indicate the area covered on the surface of the first protective layer 40 .
  • the positions on the surface of the battery cell 10 where the first protective layer 40 is provided are covered by the second protective layer 50 , so that the second protective layer 50 fully covers the first protective layer 40 .
  • the surface of the cell 10 is provided with the first protective layer 40 and the second protective layer 50 .
  • the finished product shown is shown in FIG. 1 , and the first protective layer 40 is represented by thin dots.
  • the oblique lines are used to indicate the second protective layer 50 only to show more clearly that the second protective layer 50 fully covers the first protective layer 40 .
  • the second protective layer 50 is a metal layer or a metal oxide layer
  • the metal layer can be at least one of an aluminum metal layer, a titanium metal layer, a zinc metal layer, and a chromium metal layer
  • the metal oxide layer can be aluminum oxide, titanium dioxide, at least one of zinc oxide.
  • the second protective layer 50 is an aluminum metal layer, and the second protective layer 50 is deposited on the surface of the first protective layer 40 by physical vapor deposition. Specifically, it can be performed by vacuum evaporation, sputtering or ion plating. By depositing the second protective layer 50 on the surface of the first protective layer 40 , water vapor is isolated and water vapor is prevented from entering the cell 10 through the first protective layer 40 , especially at the position of the tab 30 It plays a better role in isolating water vapor.
  • the second protective layer 50 is deposited on the surface of the first protective layer 40 by physical vapor deposition after the first protective layer 40 encapsulates the battery cell 10 . The first protective layer 40 is completely covered to prevent the first protective layer 40 from being exposed.
  • the second protective layer 50 may be a titanium metal layer or other metal layers having the same function or function, and may also be aluminum oxide or titanium dioxide.
  • the second protective layer 50 is also a mixture of an aluminum metal layer and a titanium metal layer or other metal layers, or a mixture of aluminum oxide and titanium dioxide or other metal oxide layers. Even more, the second protective layer 50 can also be a mixture of a metal layer and a metal oxide layer.
  • the distance from the second protective layer 50 away from the surface of the first protective layer 40 to the surface close to the first protective layer 40 is the thickness of the second protective layer 50 . That is, referring to FIG. 2 , the stacking direction of the battery cells 10 is the thickness direction of the second protective layer 50 .
  • the thickness of the second protective layer 50 ranges from 10 nm to 150 ⁇ m.
  • the thickness of the second protective layer 50 may be 50 nm, 100 nm, 500 nm, 800 nm, 1000 nm, 8 ⁇ m, 15 ⁇ m, 20 ⁇ m, 30 ⁇ m, 40 ⁇ m, 50 ⁇ m, 60 ⁇ m, 70 ⁇ m, 80 ⁇ m, 90 ⁇ m, 100 ⁇ m, 110 ⁇ m , 120 ⁇ m, 130 ⁇ m, 140 ⁇ m.
  • the thickness of the second protective layer 50 is set between 10 nm and 150 ⁇ m, so that the deposited aluminum metal layer is relatively thin, which can meet the requirements of the battery 100 being lightweight and has a lower cost.
  • the second protective layer 50 is deposited on the surface of the first protective layer 40 by means of physical vapor deposition, and the thickness of the second protective layer 50 deposited on the first protective layer 40 is relatively uniform, thereby The overall effect of preventing water vapor penetration of the battery 100 is improved. Further, the thickness of the second protective layer 50 is relatively uniform, which can improve the safety performance of the entire battery 100 such as anti-drop needle punch.
  • the present application further relates to an electronic device 200 , the electronic device 200 includes a casing 60 and a battery 100 accommodated in the casing 60 , and the battery 100 is the battery 100 in the above embodiment, Therefore, it has all the beneficial effects of the battery 100 in the above-mentioned embodiments, which will not be repeated here.
  • the electronic device 200 can be one of a mobile phone, a tablet computer, and a notebook. It can be understood that the electronic device 200 is not limited to this.
  • the battery 100 is provided in the embodiment of the present application, and the first protective layer 40 made of a polymer material is coated on the surface of the battery core 10 , so that the battery core 10 is packaged and The first protective layer 40 has better corrosion resistance. Then, a second protective layer 50 which is a metal layer or a metal oxide layer is deposited on the surface of the first protective layer 40. The second protective layer 50 can effectively prevent water vapor from permeating the first protective layer 40 and entering the In the battery cell 10 , the safety of the battery 100 is improved. In addition, the thickness of the second protective layer 50 is relatively thin, which reduces the overall weight of the battery 100 .

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本申请提供一种电池，包括电芯、第一保护层和第二保护层，所述第一保护层包覆所述电芯，用于隔绝电解液流出所述电芯；所述第二保护层全包覆所述第一保护层，用于隔绝水汽从所述第一保护层进入所述电芯内。本申请还涉及一种电子装置，通过采用该电池，能够更好的隔绝外部的水汽，避免出现电芯内部因进水汽而引发产气的问题。

Description

电池及电子装置 技术领域
本申请涉及电池制造技术领域，尤其涉及一种电池及电子装置。
背景技术
电芯的表面设有膜来进行封装，在现有技术中较为常见。而对电芯的防水性能一般有较高的要求，电芯表面的膜若无法很好的隔绝水汽的话，使得水汽进入电芯内，可能会引发电芯内部产生大量的气体，从而造成电芯的损坏。
发明内容
有鉴于此，有必要提供一种电池及电子装置，旨在能够有效的隔绝水汽进入电芯内部。
本申请提供的一种电池，包括电芯、第一保护层和第二保护层，所述第一保护层包覆所述电芯，用于隔绝电解液流出所述电芯；所述第二保护层全包覆所述第一保护层，用于隔绝水汽从所述第一保护层进入所述电芯内。
一种可能实现的方式中，所述电池还包括极耳，所述极耳从包覆有所述第一保护层和所述第二保护层的电芯上延伸出。
一种可能实现的方式中，所述第一保护层包覆部分所述极耳。
一种可能实现的方式中，所述第一保护层远离所述电芯的表面至靠近所述电芯表面的距离为所述第一保护层的厚度，所述第一保护层的厚度范围为20μm至100μm。
一种可能实现的方式中，所述第一保护层由高分子材料制成。
一种可能实现的方式中，所述高分子材料包括聚丙烯、聚乙烯、 聚氯乙烯中的至少一种。
一种可能实现的方式中，所述第二保护层远离所述第一保护层的表面至靠近所述第一保护层表面的距离为所述第二保护层的厚度，所述第二保护层的厚度范围为10nm至150μm。
一种可能实现的方式中，所述第二保护层为金属层或金属氧化层。
一种可能实现的方式中，所述金属层为铝金属层、钛金属层、锌金属层、铬金属层中的至少一种；所述金属氧化层为氧化铝、二氧化钛、氧化锌中的至少一种。
一种电子装置，包括壳体和收容于所述壳体内的电池，所述电池为上述中任一所述的电池。
本申请提供的电池及电子装置，该电池通过在所述电芯上设置第一保护层，所述第一保护层用于隔绝电解液流出电芯，再在所述第一保护层表面设置第二保护层，所述第二保护层用于隔绝水汽进入电芯内。从而使得水汽无法进入电芯内部，所述电芯得到保护，提升了电池的安全性。
附图说明
图1为一申请实施例中电池的立体示意图。
图2为图1所示的电池沿A-A方向的剖视图。
图3为电芯上设有第一保护层的立体示意图。
图4为在图3的基础上设有第二保护层的立体示意图。
图5为电子装置的立体示意图。
主要元件符号说明
电池                      100
电芯                      10
极片                      11
第一极片                  111
第二极片                  112
隔膜                      12
电解液                    20
极耳                      30
第一保护层                40
第二保护层                50
电子装置                  200
壳体                      60
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。
需要说明的是，当一个组件被认为是“连接”另一个组件，它可以是直接连接到另一个组件或者可能同时存在居中组件。当一个组件被认为是“设于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在居中组件。本文所使用的术语“顶”、“底”、“上”、“下”、“左”、“右”、“前”、“后”、以及类似的表述只是为了说明的目的。
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。
本申请提供一种电池，包括电芯、第一保护层和第二保护层，所述第一保护层包覆所述电芯，用于隔绝电解液流出所述电芯；所 述第二保护层全包覆所述第一保护层，用于隔绝水汽从所述第一保护层进入所述电芯内。
通过采用上述的电池，该电池通过所述第一保护层起到了封装所述电芯的作用，采用所述第二保护层，能够隔绝水汽从所述第一保护层进入所述电芯内，可有效避免水汽渗透至所述电芯内部后而引发的大量产气的问题，有效提升了电池的安全性能。
下面将通过具体实施例对本申请进行说明。
请参阅图1和图2，一种电池100，包括电芯10、第一保护层40和第二保护层50，所述第一保护层40包覆所述电芯10，用于隔绝电解液20流出所述电芯10，并且也可隔绝外部的颗粒物进入所述电芯10内。所述第二保护层50全包覆所述第一保护层40，用于隔绝水汽渗透所述第一保护层40而进入所述电芯10内。
请参阅图2，在一实施例中，所述电芯10为裸电芯。即所述电芯10包括极片11和隔膜12，所述极片11和所述隔膜12通过堆叠或者卷绕而形成裸电芯10。进一步的，所述极片11包括第一极片111和第二极片112，所述隔膜12位于所述第一极片111和所述第二极片112之间。进一步的，所述第一极片111为正极片，所述第二极片112为负极片。
可以理解的是，在其他实施方式中，所述第一极片111可替换为负极片，所述第二极片112可替换为正极片。
请再参阅图1，所述电池100还包括极耳30，所述极耳30从所述电芯10上延伸出。进一步的，所述极耳30采用焊接的方式或导电胶粘接的方式与所述极片11固定。可以理解的是，在其他实施例中，所述极耳30和所述极片11的连接方式不限于此。
请参阅图2和图3，所述第一保护层40包覆所述电芯10的表面。所述第一保护层40由高分子材料制成，所述高分子材料包括聚丙烯(PP)、聚乙烯(PE)、聚苯醚(PPE)中的至少一种。
在一实施例中，所述第一保护层40由聚丙烯制成。采用聚丙烯包覆所述电芯10，在对所述电芯10起到封装作用的同时，还具有抗腐蚀的作用。
可以理解的是，在其他实施例中，所述第一保护层40可由聚乙烯或聚苯醚制成，还可为聚丙烯和聚乙烯的混合材料制成。具体的材料可根据需要进行选择，不限于本实施例所述的内容，所述第一保护层40也可替换为其他具有同等功效或作用的材料。
所述第一保护层40远离所述电芯10的表面至靠近所述电芯10表面的距离为所述第一保护层40的厚度。即结合图2，沿所述电芯10的堆叠方向为所述第一保护层40的厚度方向。所述第一保护层40的厚度范围为20μm至100μm。
在一实施例中，所述第一保护层40的厚度可为25um、30μm、35μm、40μm、45μm、50μm、55μm、60μm、65μm、70μm、75μm、80μm、85μm、90μm、95μm。
将所述第一保护层40的厚度设于20μm至100μm之间，可保证所述电池100的能量密度，避免因所述第一保护层40过厚，导致所述电池100的能量密度下降。并且，将所述第一保护层40的厚度设于20μm至100μm之间，在将所述第一保护层40进行折叠时，其在拐弯或倒角位置处更加容易进行弯折。若所述第一保护层40过薄，在弯折所述第一保护层40时，其容易产生裂纹。而若所述第一保护层40过厚，则不便于其进行弯折。
在一实施例中，所述第一保护层40是对所述电芯10和设于所述电芯10上的极耳30采用封装工艺进行包覆封装。该过程中，需要将所述第一保护层40通过冲压的方式形成与所述电芯10相适配的凹坑，将所述电芯10放入其中进行封装。在封装的过程中，需要对位于所述第一保护层40内的电芯10注充电解液20，采用所述第一保护层40进行封装，所述第一保护层40与电解液20接触时，具 有良好的抗腐蚀能力。该封装工艺在现有技术中较为常见，在此，不再对其具体的封装过程进行赘述。
进一步的，所述第一保护层40包覆在所述电芯10的表面，在所述极耳30和所述电芯10连接的一端，所述极耳30的外表面设有与所述第一保护层40材料大致相同的粘胶(图未示)，所述第一保护层40包覆该粘胶，通过所述粘胶粘紧密封所述第一保护层40与所述极耳30的连接位置，以避免所述电解液20流出。
请参阅图2和图4，所述第二保护层50全包覆在所述第一保护层40的表面，进一步的，在图4中，所述第一保护层40采用细点表示其包覆在所述电芯10表面的面积。而在图4中，所述第二保护层50采用斜线的表示其包覆在所述第一保护层40表面的面积。所述电芯10的表面设有第一保护层40的位置处均被所述第二保护层50所覆盖，从而实现所述第二保护层50全包覆所述第一保护层40。在实际情况中，所述电芯10的表面设有所述第一保护层40和所述第二保护层50所展示的成品如图1中所示，采用细点表示所述第一保护层40及采用斜线表示所述第二保护层50仅是为了更清楚的显示第二保护层50全包覆所述第一保护层40。
所述第二保护层50为金属层或者金属氧化层，金属层可为铝金属层、钛金属层、锌金属层、铬金属层中的至少一种，金属氧化层可为氧化铝、二氧化钛、氧化锌中的至少一种。
在一实施例中，所述第二保护层50为铝金属层，所述第二保护层50通过物理气相沉积的方式沉积于所述第一保护层40表面。具体的，可通过真空蒸镀、溅射镀或者离子镀等方式进行。通过在所述第一保护层40的表面沉积所述第二保护层50，从而隔绝水汽，避免水汽通过所述第一保护层40进入所述电芯10内，尤其在所述极耳30位置处，起到了更好的隔绝水汽的作用。在一实施例中，所述第二保护层50在所述第一保护层40将所述电芯10封装好后，通 过物理气相沉积的方式沉积于所述第一保护层40表面，将所述第一保护层40完全覆盖，防止所述第一保护层40外露出来。
可以理解的是，在其他实施例中，所述第二保护层50可为钛金属层或其他具有同等功效或作用的金属层，也可为氧化铝、二氧化钛。所述第二保护层50也为铝金属层和钛金属层或其他金属层的混合，或者氧化铝和二氧化钛或其他金属氧化层的混合。更甚至，所述第二保护层50还可为金属层和金属氧化层的混合。
所述第二保护层50远离所述第一保护层40的表面至靠近所述第一保护层40表面的距离为所述第二保护层50的厚度。即结合图2，沿所述电芯10的堆叠方向为所述第二保护层50的厚度方向。所述第二保护层50的厚度范围为10nm至150μm。
在一实施例中，所述第二保护层50的厚度可为50nm、100nm、500nm、800nm、1000nm、8μm、15μm、20μm、30μm、40μm、50μm、60μm、70μm、80μm、90μm、100μm、110μm、120μm、130μm、140μm。
将所述第二保护层50的厚度设于10nm至150μm之间，使得沉积的铝金属层较薄，能够满足所述电池100轻量化的需求且成本较低。并且，通过物理气相沉积的方式在所述第一保护层40的表面沉积所述第二保护层50，所述第二保护层50沉积于所述第一保护层40上的厚度较为均匀，从而提升所述电池100整体的防止渗水汽的效果。进一步的，所述第二保护层50的厚度较为均匀，可以提升整个所述电池100的抗跌落针刺等安全性能。
请参阅图5，本申请还涉及一种电子装置200，所述电子装置200包括壳体60和收容于所述壳体60内的电池100，所述电池100为上述实施例中的电池100，因而具有上述实施例中的电池100的一切有益效果，在此，不再进行赘述。
所述电子装置200可为手机、平板电脑、笔记本中的一种。可 以理解的是，所述电子装置200不限于此。
综上所述，本申请实施例中提供电池100，通过在所述电芯10表面包覆一由高分子材料制成的所述第一保护层40，从而对所述电芯10进行封装且所述第一保护层40具有较好的抗腐蚀性能。再在所述第一保护层40的表面沉积一为金属层或金属氧化层的第二保护层50，所述第二保护层50能够有效的防止水汽渗透所述第一保护层40而进入所述电芯10内，提升所述电池100的安全性。并且，所述第二保护层50的厚度较薄，降低了所述电池100的整体的重量。
另外，本技术领域的普通技术人员应当认识到，以上的实施例仅是用来说明本申请，而并非用作为对本申请的限定，只要在本申请的实质精神范围之内，对以上实施例所作的适当改变和变化都落在本申请公开的范围之内。

Claims (10)

  1. 一种电池，包括：
    电芯；
    其特征在于，所述电池还包括：
    第一保护层，所述第一保护层包覆所述电芯，用于隔绝电解液流出所述电芯；及
    第二保护层，所述第二保护层全包覆所述第一保护层，用于隔绝水汽从所述第一保护层进入所述电芯内。
  2. 如权利要求1所述的电池，其特征在于，所述电池还包括极耳，所述极耳从包覆有所述第一保护层和所述第二保护层的电芯上延伸出。
  3. 如权利要求2所述的电池，其特征在于，所述第一保护层包覆部分所述极耳。
  4. 如权利要求1所述的电池，其特征在于，所述第一保护层远离所述电芯的表面至靠近所述电芯表面的距离为所述第一保护层的厚度，所述第一保护层的厚度范围为20μm至100μm。
  5. 如权利要求1所述的电池，其特征在于，所述第一保护层由高分子材料制成。
  6. 如权利要求5所述的电池，其特征在于，所述高分子材料包括聚丙烯、聚乙烯、聚氯乙烯中的至少一种。
  7. 如权利要求1所述的电池，其特征在于，所述第二保护层远离所述第一保护层的表面至靠近所述第一保护层表面的距离为所述第二保护层的厚度，所述第二保护层的厚度范围为10nm至150μm。
  8. 如权利要求1所述的电池，其特征在于，所述第二保护层为金属层或金属氧化层。
  9. 如权利要求8所述的电池，其特征在于，所述金属层为铝金属层、钛金属层、锌金属层、铬金属层中的至少一种；所述金属氧 化层为氧化铝、二氧化钛、氧化锌中的至少一种。
  10. 一种电子装置，包括壳体和收容于所述壳体内的电池，其特征在于，所述电池为权利要求1至9中任一项所述的电池。
PCT/CN2020/123141 2020-10-23 2020-10-23 电池及电子装置 WO2022082707A1 (zh)

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