WO2018049561A1 - 电池 - Google Patents

电池 Download PDF

Info

Publication number
WO2018049561A1
WO2018049561A1 PCT/CN2016/098850 CN2016098850W WO2018049561A1 WO 2018049561 A1 WO2018049561 A1 WO 2018049561A1 CN 2016098850 W CN2016098850 W CN 2016098850W WO 2018049561 A1 WO2018049561 A1 WO 2018049561A1
Authority
WO
WIPO (PCT)
Prior art keywords
colloid
battery according
packaging film
battery
main
Prior art date
Application number
PCT/CN2016/098850
Other languages
English (en)
French (fr)
Inventor
郭培培
何平
张亚杰
殷科
彭业军
程文强
Original Assignee
东莞新能源科技有限公司
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 东莞新能源科技有限公司 filed Critical 东莞新能源科技有限公司
Priority to PCT/CN2016/098850 priority Critical patent/WO2018049561A1/zh
Publication of WO2018049561A1 publication Critical patent/WO2018049561A1/zh

Links

Images

Classifications

    • 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
    • H01M50/183—Sealing members
    • 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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • 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 application relates to the field of battery technologies, and in particular, to a battery.
  • the battery includes a bare cell, an upper packaging film, and an underlying packaging film.
  • the upper packaging film and the lower packaging film are joined at the peripheral edges to form a package chamber at the intermediate portion and an extended edge at the peripheral edge.
  • the extending edge is cut to form a cut surface. Since the upper packaging film and the lower packaging film are provided with a metal interlayer, the cut surface may expose a metal layer, and the exposed metal layer may cause a short circuit of the battery. Therefore, the cut surface needs to be sealed during the manufacturing process of the bare cell to prevent the metal layer from being exposed.
  • the first solution is to cover the cut surface with an insulating adhesive tape, block the exposed metal layer, and then fix the extended edge on the upper packaging film or the lower packaging film by using an adhesive tape;
  • the second solution is to double-extend the extended edge, hide the cut surface in the double-folded edge, and then flip the extended edge and fix it with the upper packaging film or the lower packaging film.
  • the embodiment of the present application provides a battery that can solve the above defects.
  • a battery comprising a bare cell, a first packaging film, and a second packaging film, the edges of the first packaging film and the second packaging film are bonded to each other to form a package chamber and are oriented by the package chamber An extended extension edge, the bare cell is encapsulated in the package cavity
  • the extended edge has a cut surface
  • the battery further includes a main colloid covering the cut surface, and the thickness value h 1 of the main colloid covering the cut surface ranges from 5 ⁇ m or more and less than or equal to the thickness h of the battery. 1/2.
  • the extending edge has a contact with the cutting surface and is relatively distributed along a thickness direction of the extending edge
  • the primary colloid extends toward the side and covers the side.
  • the side surface has a recess
  • the main colloid extends toward the side surface and is filled in the recess.
  • the extending edge is provided with at least one through hole penetrating through the two sides, and the main colloid extends toward the side surface and enters the through hole.
  • the main colloid extends to the two sides, and the main colloids on the two sides are in contact via the through holes.
  • the number of the through holes is plural, a plurality of the through holes are arranged along an extending direction of the cutting face, and the main colloid enters into each of the through holes.
  • the extending edge is bent to one side such that at least a portion of the one of the sides faces the one side surface of the first packaging film, the surface extending along the thickness direction of the bare cell a surface, and the portion of the region is a portion of the side away from the packaging chamber.
  • At least a portion of the area on the side is parallel to the surface.
  • the extending edge is bent to one side such that a portion of the side surface of the one side is in contact with another partial area of the side surface, the partial area being a portion of the side away from the packaging chamber .
  • a portion of the extended side that is connected to the package chamber is located at a side edge of a surface extending in a thickness direction of the bare cell.
  • a fixing colloid is further included, and the extending edge is fixed on the first packaging film by the fixing colloid.
  • the fixing colloid is a glue layer or an injection glue layer.
  • At least a portion of the area on the side is secured to the first packaging film by the fixing gel.
  • a length h 2 of the main colloid covering the side surface extending from a side of the cutting plane close to the packaging chamber is greater than and equal to the main colloid thickness h 1 covering the cutting plane 1/5.
  • the thickness value h 3 of the main colloid covering the side surface has a value value of 5 ⁇ m or more.
  • one of the surfaces of the first packaging film is used as a projection surface, and the extended edge corresponding to the projection surface and the main colloid are projected on the projection surface in a direction perpendicular to the projection surface.
  • the resulting extended edge and the projection of the primary colloid are located within the range of the projection surface.
  • the outer contour of the cross section of the main colloid is any one of the following three:
  • the main colloid is a glue layer or an injection glue layer.
  • the technical solution provided by the present application can achieve the following beneficial effects:
  • the battery provided by the present application includes a main colloid, and the main colloid covers the cut surface, which solves the problem of exposure of the metal layer and reduces the occurrence of a short circuit.
  • the main colloid can be coated on the cut surface by the gluing device. Therefore, the setting of the main colloid is not limited by the shape of the battery, and it is not only suitable for the battery with a regular shape, but also can be more suitably applied to the irregular shape.
  • the thickness value h 1 of the main colloid covering the cut surface is 5 ⁇ m or more and less than or equal to 1/2 of the thickness h of the battery, so that the metal layer of the cut surface is reliably covered and the space is occupied as much as possible, thereby ensuring the battery. Security performance.
  • Figure 1 is a schematic view of a battery provided by an embodiment of the present application.
  • FIG. 2 is a schematic view II of a battery provided by an embodiment of the present application.
  • Figure 3 is an A-A view of Figure 2;
  • Figure 4 is a schematic view III of the battery provided by the embodiment of the present application.
  • Figure 5 is a B-B view of Figure 4.
  • Figure 6 is a cross-sectional view I of the battery provided by the embodiment of the present application.
  • Figure 7 is a cross-sectional view II of a battery provided by an embodiment of the present application.
  • the embodiment of the present application provides a battery including a first packaging film 1, a second packaging film 2, and a bare cell 3.
  • the first packaging film 1 and the second packaging film 2 are bonded to each other at the peripheral edges to form a package chamber and an extended side 4 extending outward from the package chamber, and the bare cell 3 is packaged in the package chamber.
  • the positive and negative poles on the bare cell 3 protrude from the package chamber, and the output of the bare cell 3 can be realized.
  • the first packaging film 1 and the second packaging film 2 may be of a split structure.
  • a groove may be formed on the first packaging film 1, and then the first packaging film 1 and the second packaging film 2 are stacked, and both are edged by, for example, a heat sealing process Engage at the place.
  • a package chamber accommodating the bare cell 3 is formed at a groove between the first packaging film 1 and the second packaging film 2, and an extended side 4 is formed at the edge portion.
  • the first packaging film 1 and the second packaging film 2 may also have a one-piece structure.
  • the extending edge 4 formed by the first packaging film 1 and the second packaging film 2 is subjected to cutting so that the length of the extending edge 4 extending from the packaging chamber is moderate, and if the length of the extending edge 4 is too large, it will follow
  • the assembly space occupies a large assembly space, which is not conducive to increasing the energy density of the battery.
  • the main colloid 5 can be applied to the cut surface 41 by hand or a gluing device and bonded to the cut surface 41 by curing.
  • the primary colloid 5 prevents exposure of the metal layer and reduces the risk of shorting the battery.
  • the main colloid 5 is preferably coated on the cut surface 41 by a coating process, the setting of which is not affected by the shape of the battery, and the solution is not only suitable for use in a battery having a regular shape, but also can be better applied to a shaped battery, so that the cut surface
  • the metal layer of 41 is reliably covered and minimizes space occupation, which is beneficial to ensure the safety performance of the battery.
  • the main colloid 5 is not limited to the adhesive layer provided on the cut surface 41 by coating.
  • the main colloid 5 may also be an injection molding layer provided on the cut surface 41 by injection molding or the like.
  • the range of the thickness value h 1 of the main colloid 5 covering the cut surface 41 is set to be 5 ⁇ m or more and less than or equal to 1/2 of the battery thickness h, where "thickness value h 1 " refers to either the main colloid 5 on the cut surface 41
  • the thickness value of the main colloid 5 can completely avoid the bare metal layer on the cut surface 41, and the battery has sufficient effective package size to ensure the reliability of the battery package without affecting the energy density of the battery. Sex.
  • the inventors conducted a number of tests, and the following table is related test data.
  • the range of the thickness value h 1 of the main colloid 5 covering the cut surface 41 in the present invention can be set to be between 5 ⁇ m and less than (1/2) h, and further preferred embodiment. It is 10 ⁇ m to (2/5) h.
  • the main colloid 5 can be a hot melt adhesive, a UV curable adhesive or a photosensitive adhesive, or an acrylate adhesive, a polyurethane hot melt structural adhesive, and a hot melt structural adhesive of ethylene and a copolymer thereof.
  • the extended side 4 has two side faces 42 which are in contact with the cut surface 41.
  • the two side faces 42 are relatively distributed in the thickness direction of the extended side 4, in order to reduce the risk of the main colloid 5 falling off the cut surface 41, Main colloid 5 Part or all of the cover is on at least one side 42.
  • the primary colloid 5 may extend over only one side 42 and not on the other side 42. According to another embodiment, the primary colloid 5 may cover only a portion of one of the sides 42 instead of covering the entire side 42. In other embodiments, the primary colloid 5 may also extend over the two sides 42 and completely over the two sides 42. In the above embodiments, the connection area of the main colloid 5 and the extended side 4 can be increased, and the connection strength is increased, thereby increasing the connection strength between the main colloid 5 and the cut surface 41.
  • the main colloids 5 extend toward the two side faces 42, respectively, and cover a portion of the area on the two side faces 42, the extension of the main colloid 5 on the two side faces 42 being symmetrical. structure.
  • the thickness value h 3 of the main colloid 5 covering the side surface 42 is set to be greater than and equal to 5 ⁇ m, where "thickness value h 2 " refers to the thickness value of the main colloid 5 at any position on the side surface 42, Within this range, the bonding strength of the main colloid 5 can be effectively improved and the glue line on the side surface 42 can be continuously flattened and the appearance is good.
  • the thickness value h 3 of the main colloid 5 covering the side surface 42 the inventors conducted a number of tests, and the following table is related test data.
  • the length h 2 of the main colloid 5 covering the side surface 42 was set to be 50 ⁇ m.
  • the thickness value h 3 of the main colloid 5 covering the side surface 42 in the present invention may be set to be 5 ⁇ m or more, and further preferably 10 ⁇ m or more.
  • the length h 2 of the main colloid 5 covering the side surface 42 extending from the cut surface 41 toward the side close to the package chamber is preferably greater than and equal to 1/5 of the thickness h 1 of the main colloid 5 covering the cut surface 41. Within this range, the bonding strength of the main colloid 5 can be effectively improved, and the glue line on the side surface 42 is continuously flat and the appearance is good.
  • the length value h 2 on the side 42 of the main colloid 5 the inventors conducted a number of tests, and the following table is related test data. Here, h 1 was set to 100 ⁇ m, and h 3 was 10 ⁇ m.
  • the main colloid 5 is from the cut surface 41 toward the package chamber on the premise that the thickness value h 1 of the main colloid 5 covering the cut surface 41 is 100 ⁇ m and the thickness h 3 is 10 ⁇ m.
  • the bonding strength is remarkably improved and the appearance of the glue line is continuously flat without appearance defects.
  • the length h 2 of the main colloid 5 in the present invention extending from the cut surface 41 toward the side close to the package chamber can be set to be larger than and equal to the main colloid 5 covering the cut surface 41.
  • 1/5 of the thickness h 1 a further embodiment preferably greater than the thickness h 1 is equal to 2/5.
  • the through hole 43 is disposed on the side surface 42 and penetrates the two side surfaces 42, respectively.
  • the main colloid 5 extends toward one of the side faces 42 and enters the through hole 43.
  • the through hole 43 and the main colloid 5 form a structure similar to the pin hole and the pin, so that the risk of the main colloid 5 falling off the cut surface 41 is further reduced.
  • the through hole 43 can be provided as a circular hole or a polygonal hole, which is not limited in this application.
  • the primary colloids 5 extend toward the two sides 42, respectively, and on the two sides 42
  • the main colloid 5 is connected via the through hole 43.
  • the main colloid 5 passing through the through hole 43 has a connecting bridge, and the main colloids 5 covering the two side faces 42 are connected together, and the connection reliability is achieved. Further improve.
  • the cut surface 41 is an extended surface that extends along the circumferential direction of the package chamber. Therefore, a further preferred embodiment can be obtained. As shown in FIG. 4, a plurality of through holes 43 can be disposed on the extended side 4, and the through holes are provided. 43 is arranged along the extending direction of the cut surface 41, and the main colloid 5 enters each of the through holes 43. Thus, the main colloid 5 can maintain a firm adhesive force with the cut surface 41 over the entire length of the cut surface 41.
  • the through hole 43 when the through hole 43 penetrates the side surface 42, a new metal layer is exposed, and in order to avoid unnecessary defects, the main colloid 5 passing through the through hole 43 is preferably covered.
  • the entire inner wall of the hole 43 is used to reliably wrap all of the exposed metal layers.
  • Embodiments for reducing the risk of the primary colloid 5 falling off the extended edge 4 are not limited to the solution illustrated in Figures 3-5.
  • a recess may also be provided on the side 42 and the primary colloid 5 may be along the side. 42 extends and fills the recess.
  • more of the main colloid 5 is collected in the recess, and the main colloid 5 adjacent to the recess is attracted by the main colloid 5 collected in the recess due to the characteristics of colloidal gathering, which makes the main cover over the cut surface 41.
  • the colloid 5 is subjected to a force which facilitates the adhesion between it and the cut surface 41.
  • the present application does not limit the shape of the main colloid 5, and the outer contour of the cross section of the main colloid 5 may include any one of three, that is, a part of a circular outline, a part of an elliptical outline, and a square outline.
  • a part of the line, the shape of the outer contour line of the cross section of the main colloid 5 is related to the shape of the glue outlet, and the shape of the outer contour line can make the structure of the glue outlet simple.
  • the outer contour of the cross section of the primary colloid 5 can be set to other irregular shapes.
  • the extended edge 4 extends outwardly from the package chamber in a linear direction.
  • the battery is usually mounted as an electronic device, such as a mobile phone, a laptop, or the like, inside the electronic device, and the assembly space for accommodating the battery is limited.
  • the extended edge 4 may be bent to one side to reduce the space occupied by the extended edge 4.
  • the one side surface 42 of the extending edge 4 can be away from a part of the packaging chamber toward the first packaging film 1.
  • One side of the surface For another example, when the extended side 4 is bent to one side, one of the side faces 42 of the extended side 4 may be directed toward one side surface of the first wrapping film 1.
  • a portion of the side surface 42 away from the package chamber may be attached to another partial area of the side surface 42, that is, the extended side 4
  • the end portions are folded 180° and the like, and the above embodiments can reduce the space occupied by the extended side 4 to reduce the volume of the battery.
  • the relative position of the side surface 42 to one side surface of the first wrapping film 1 may be inclined or parallel.
  • the space occupied by the extended side 4 can be further reduced compared to the inclined manner.
  • FIG. 6 shows a preferred embodiment when the extended side 4 is bent to one side, and one of the side faces 42 of the extended side 4 faces the first packaging film 1 in the thickness direction of the bare cell 3 (FIG. 6).
  • the surface 11 extending in the middle X direction).
  • the extended side 4 is bent to one side such that the entire side 42 faces the surface 11 of the first wrapping film 1.
  • the extended side 4 does not occupy the space in the depth direction of the battery receiving groove, avoids interference during assembly, and is better suited to the design requirements of the receiving groove.
  • the side surface 42 and the surface 11 are parallel to each other. In this embodiment, the space occupied by the extended side 4 is further reduced.
  • one of the side faces 42 of the extended side 4 may also face in the thickness direction of the bare cell 3.
  • the other two surfaces 12 are relatively distributed.
  • the extended side 4 is also preferable to provide a portion of the extended side 4 that is connected to the package chamber at a side edge of the surface 11 extending in the thickness direction of the bare cell 3, since the extended edge 4 has a size at the time of cutting. Deviation, after such setting, when the extended edge 4 is bent toward one side of the surface 11, even if the dimension of the cut edge 4 extending from the package chamber is positively biased, by setting the extended edge 4 With the above position, the risk that the extended side 4 exceeds the thickness of the bare cell 3 can be reduced.
  • the surface 11 on the first packaging film 1 is used as a projection surface, and the extended side 4 corresponding to the projection surface and the main colloid 5 are projected on the projection surface in a direction perpendicular to the projection surface, and the obtained extension is obtained.
  • the projection of the edge 4 and the main colloid 5 is located within the range of the projection surface.
  • the above arrangement can also be adopted to ensure that the extended edge 4 and the main colloid 5 do not cause an increase in the thickness direction of the bare cell 3, avoiding Interference caused by the assembly of electronic equipment.
  • the battery may further include a fixed colloid 6 and a fixed colloid.
  • 6 is used to fix the extended edge 4, and when the extended side 4 is bent toward the side of the first wrapping film 1, the extended side 4 is fixed to the first wrapping film 1 by the fixing glue 6.
  • the extension edge 4 is fixed on the first packaging film 1 to reduce the occupied space of the extended side 4, increase the compactness of the battery structure, and improve the energy density of the battery.
  • the fixing colloid 6 is preferably applied to the side surface 42 or the coating layer on the first packaging film 1 in a coating manner.
  • the fixing colloid 6 may be an insulating glue such as a hot melt adhesive or a photosensitive adhesive. Further, an acrylate-based rubber, a polyurethane hot-melt structural adhesive, and a hot-melt structural adhesive of ethylene and a copolymer thereof may also be preferable. Furthermore, the fixing glue 6 can also be provided on the side 42 or the injection molding layer on the first packaging film 1 by injection molding.
  • the fixing colloid 6 can be provided with a fixing colloid 6 on a part of the side surface 42 and fixed to the first packaging film 1 by the fixing colloid 6.
  • the fixing colloid 6 may be disposed on the entire side surface 42 and the side surface 42 is fixed to the first packaging film 1 by the fixing colloid 6.
  • the embodiment of the first embodiment is shown in FIG.
  • the fixing colloid 6 in Fig. 7 has a thickness dimension h 4 between the side surface 42 and the first wrapping film 1, and the fixing colloid 6 has a length dimension h 5 extending on the side surface 42.
  • the fixing colloid 6 is connected to the main colloid 5, and the fixing colloid 6 is integrally joined with the main colloid 5, so that the fixing of the extended side 4 and the first packaging film 1 is more reliable, and the extending edge 4 is reduced due to bonding. The risk of opening from the first packaging film 1 is not secure.
  • test samples 1# to 3# of the battery are fabricated according to the improved technical solution, and the test sample 4# of the battery is prepared according to the prior art.
  • the number of test samples 1# to 4# was 100 each, and a comparison test was performed.
  • a battery was prepared by a lamination process.
  • a groove is punched on the first wrap film 1 having a thickness of 60 ⁇ m, and the bare cell 3 is placed in the groove, and then the second wrap film 2 is stacked on the first wrap film 1 Close the groove and close the edges.
  • the groove is formed as a package chamber, and the peripheral edge is formed as an extended edge 4.
  • the extended side 4 is encapsulated by a heat sealing head, and then the packaged battery is obtained through a series of processes such as drying, liquid injection, standing, chemical formation, and liquid heat sealing.
  • the extended edge 4 is cut to remove the excess portion of the extended edge 4. After cutting, the length of the extended edge 4 extending outward from the package chamber is 2.8 mm.
  • the main colloid 5 (modified acrylate glue) is covered on the cut surface 41 of the extended side 4, followed by light curing, and the cured rubber layer h 1 is 0.20 mm, h 2 is 0.6 mm, and h 3 is 0.05 mm. .
  • a fixing colloid 6 (polyurethane hot-melt structural adhesive) is disposed, and the fixing colloid 6 is disposed on the extended side 4 at a position of 1.2 mm from the cut surface 41, and then the extended side 4 is folded over the first packaging film 1 and pressed through the fixed colloid. 6 is fixed on the first packaging film 1, h 4 is 0.1 mm, and h 5 is 1 mm.
  • a through hole 43 having a diameter of 0.3 mm and a pitch of 10 mm is formed on the extended side 4, and the through hole 43 penetrates the side surface 42, and the main colloid 5 extends and enters the through hole 43.
  • h 1 was set to 0.20 mm
  • h 2 was 1.5 mm
  • h 3 was 0.1 mm.
  • the fixing colloid 6 (modified acrylate adhesive) is disposed on the extended side 4 at a position of 1.2 mm from the cut surface 41, and then the extended side 4 is folded over the first packaging film 1 and fixed by the fixing colloid 6 at the first position.
  • h 4 was 0.1 mm
  • h 5 was 1 mm.
  • the cut surface 41 of the shaped core is wrapped by a plurality of U-shaped insulating glues, and then the extended side 4 is folded, and the extended side 4 is bonded to the packaging film by the double-sided tape of the insulating adhesive paper.
  • the above test piece was subjected to a high temperature and high humidity storage test, and the increase value of the battery in the extending direction of the extended side 4 was measured, and the cut surface 41 of the extended side 4 was observed for the presence or absence of the metal layer exposure.
  • the following table is related experimental data.
  • test samples 1# to 3# did not show metal layer exposure, and the pass rate was 100%.
  • the increase in the direction of extension of the battery in the direction of extension 4 is less than 0.05 mm.
  • Test sample 4# showed a metal layer exposure, and the failure rate was 100%. Therefore, in contrast, the solution provided by the embodiments of the present application achieves significant technological progress and good technical effects.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

一种电池，该电池包括裸电芯（3）、第一包装膜（1）以及第二包装膜（2），所述第一包装膜（1）以及所述第二包装膜（2）的边缘处相互贴合形成封装腔室以及由所述封装腔室向外延伸的延伸边（4），所述裸电芯（3）被封装在所述封装腔室内，所述延伸边（4）具有切面（41），电池还包括主胶体（5），所述主胶体（5）覆盖在所述切面（41）上，所述主胶体（5）覆盖在所述切面（41）上的厚度值h 1的范围为大于等于5μm且小于等于电池厚度h的1/2。该方案有效解决了切面（41）上金属层暴露的问题，避免了短路的发生，并同时适用于形状规则的电池以及异形电池，提高了电池的安全性。

Description

电池 技术领域
本申请涉及电池技术领域，尤其涉及一种电池。
背景技术
电池包括裸电芯、上层包装膜以及下层包装膜，上层包装膜以及下层包装膜在四周边缘处结合，在中间部位形成封装腔室，在四周边缘处形成延伸边。延伸边经裁切处理后形成切面，由于上层包装膜以及下层包装膜中设置有金属夹层，裁切后的切面上会暴露出金属层，暴露的金属层可能导致电池短路的风险。因此，在裸电芯制造过程中需要对该切面进行密封，以防止金属层外露。
相关技术中，存在解决上述问题的方案，第一种方案是利用绝缘胶纸包裹切面，遮挡暴露在外的金属层，然后再利用绝缘胶纸将延伸边固定在上层包装膜或下层包装膜上；第二种方案是将延伸边进行双层折边，将切面隐藏在双层折边内，然后再将延伸边翻转并与上层包装膜或下层包装膜固定。
上述两种方案通常应用在形状规则的电池中，而对于形状不规则的异形电池来说，采用绝缘胶纸或者采用双层折边密封切面的方式均有较大的实现难度。并且，绝缘胶纸以及双折边的方式均难以完全包裹暴露在外的金属层，例如，在切面的两端，仍然存在金属层暴露的风险。
因此，需要提出一种技术方案解决上述缺陷。
发明内容
本申请实施例提供了一种电池，可解决上述缺陷。
一种电池，包括裸电芯、第一包装膜以及第二包装膜，所述第一包装膜以及所述第二包装膜的边缘处相互贴合形成封装腔室以及由所述封装腔室向外延伸的延伸边，所述裸电芯被封装在所述封装腔室内，
所述延伸边具有切面，
所述电池还包括主胶体，所述主胶体覆盖在所述切面上，所述主胶体覆盖在所述切面上的厚度值h1的范围为大于等于5μm且小于等于所述电池的厚度h的1/2。
优选地，所述延伸边具有与所述切面均相接且沿所述延伸边的厚度方向相对分布的 两个侧面，所述主胶体向所述侧面延伸并覆盖所述侧面。
优选地，所述侧面具有凹部，所述主胶体向所述侧面延伸并填充于所述凹部内。
优选地，所述延伸边上开设有至少一个通孔，所述通孔贯穿两个所述侧面，所述主胶体向所述侧面延伸并进入所述通孔中。
优选地，所述主胶体分别向两个所述侧面延伸，两个所述侧面上的所述主胶体经由所述通孔相接。
优选地，所述通孔的数量为多个，多个所述通孔沿所述切面的延伸方向排布，且所述主胶体进入每个所述通孔中。
优选地，所述延伸边向一侧弯折，使其中一个所述侧面上的至少一部分区域朝向所述第一包装膜的其中一侧表面，该表面为沿所述裸电芯厚度方向延伸的表面，且所述一部分区域为所述侧面远离所述封装腔室的一部分区域。
优选地，所述侧面上的至少一部分区域与所述表面平行。
优选地，所述延伸边向一侧弯折，使其中一个所述侧面上的一部分区域与该侧面的另一部分区域贴合，所述一部分区域为所述侧面远离所述封装腔室的一部分区域。
优选地，所述延伸边与所述封装腔室相连接的部位位于沿所述裸电芯厚度方向延伸的表面的一侧边缘。
优选地，还包括固定胶体，所述延伸边通过所述固定胶体固定在所述第一包装膜上。
优选地，所述固定胶体为涂胶层或注塑胶层。
优选地，所述侧面上的至少一部分区域通过所述固定胶体固定在所述第一包装膜上。
优选地，覆盖在所述侧面上的所述主胶体从所述切面向靠近所述封装腔室的一侧延伸的长度h2大于并等于覆盖在所述切面上的所述主胶体厚度h1的1/5。
优选地，覆盖在所述侧面上的所述主胶体的厚度值h3的范围值为大于等于5μm。
优选地，将所述第一包装膜的其中一个表面作为投影面，且将与该投影面相对应的所述延伸边以及所述主胶体沿垂直于该投影面的方向在该投影面上投影，所得到的所述延伸边以及所述主胶体的投影位于该投影面的范围内。
优选地，所述主胶体的横截面的外轮廓线为如下三者中的任意一者：
圆形轮廓线的一部分；
椭圆形轮廓线的一部分；
方形轮廓线的一部分。
优选地，所述主胶体为涂胶层或注塑胶层。本申请提供的技术方案可以达到以下有益效果：
本申请提供的电池，包括主胶体，主胶体覆盖在切面上，解决了金属层的外露问题，减少了短路的发生。同时，主胶体可以通过涂胶装置涂覆在切面上，因此，主胶体的设置不会受到电池形状的限制，其不仅适用于形状规则的电池中，还可以更好的适用形状不规则的异形电池中。主胶体覆盖在切面上的厚度值h1的范围为大于等于5μm且小于等于电池厚度h的1/2，使得切面的金属层被可靠的包覆并尽可能减小空间占用，有利于保证电池的安全性能。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本申请。
附图说明
图1为本申请实施例所提供的电池的示意图I；
图2为本申请实施例所提供的电池的示意图II；
图3为图2中的A-A视图；
图4为本申请实施例所提供的电池的示意图III；
图5为图4中的B-B视图；
图6为本申请实施例所提供的电池的剖视图I；
图7为本申请实施例所提供的电池的剖视图II。
附图标记：
1-第一包装膜；
  11-表面；
  12-表面；
2-第二包装膜；
3-裸电芯；
4-延伸边；
  41-切面；
  42-侧面；
  43-通孔；
5-主胶体；
6-固定胶体。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
下面通过具体的实施例并结合附图对本申请做进一步的详细描述。文中所述“前”、“后”、“左”、“右”、“上”、“下”均以附图中的电池放置状态为参照。
如图1-3所示，本申请实施例提供了一种电池，该电池包括第一包装膜1、第二包装膜2以及裸电芯3。第一包装膜1以及第二包装膜2在四周边缘处相互贴合形成封装腔室以及由封装腔室向外延伸的延伸边4，裸电芯3被封装在封装腔室内。裸电芯3上的正极极耳和负极极耳从封装腔室内伸出，可以实现裸电芯3电能的输出。
第一包装膜1以及第二包装膜2可以是分体结构。在形成封装腔室和延伸边4时，可以在第一包装膜1上加工出凹槽，然后将第一包装膜1与第二包装膜2叠置，通过例如热封工艺将两者在边缘处接合。这样，在第一包装膜1与第二包装膜2之间的凹槽处形成容纳裸电芯3的封装腔室，在边缘部位形成延伸边4。此外，第一包装膜1和第二包装膜2还可以采用一体式结构。
由第一包装膜1以及第二包装膜2形成的延伸边4要经过裁切，以使得延伸边4从封装腔室延伸出来的长度适中，如果延伸边4的长度过大，就会在后续的装配中占用较大的装配空间，不利于提高电池的能量密度。
延伸边4裁切后形成切面41，切面41上覆盖有主胶体5。主胶体5可以通过手工或涂胶设备涂覆在切面41上，并经过固化粘接在切面41上。主胶体5防止了金属层的暴露，降低了电池短路的风险。并且，主胶体5优选通过涂覆工艺涂覆在切面41上，其设置不受电池形状的影响，该方案不仅适用于形状规则的电池中，还可以更好的适用于异形电池中，使得切面41的金属层被可靠的包覆并尽可能减小空间占用，有利于保证电池的安全性能。另外，主胶体5不仅限于通过涂覆的方式设置在切面41上的涂胶层，例如，主胶体5还可以是通过注塑等方式设置在切面41上的注塑胶层。
主胶体5覆盖在切面41上的厚度值h1的范围设置在大于等于5μm且小于等于电池厚度h的1/2，此处“厚度值h1”指的是主胶体5在切面41上任一处的厚度值，在此范围内，主胶体5能够彻底避免切面41上金属层的裸露，并在不影响电池的能量密度 的前提下，使电池有足够的有效封装尺寸，确保电池封装的可靠性。
关于主胶体5覆盖在切面41上的厚度值h1，发明人进行多次试验，下表是相关试验数据。
表1
Figure PCTCN2016098850-appb-000001
根据表1中所示试验数据，可知：在保证电池能量密度的前提下，当主胶体5覆盖在切面41上的厚度值h1小于5μm时，切面41上的金属层存在暴露的风险。当主胶体5覆盖在切面41上的厚度值h1大于(1/2)h时，电池存在漏液风险，封装可靠性降低。
根据表1所示的试验数据可知，本发明中的主胶体5覆盖在切面41上的厚度值h1的范围可以设置在大于等于5μm且小于(1/2)h之间，进一步的优选方案是10μm～(2/5)h。
主胶体5可以热熔胶、紫外光固化胶或光敏胶等，也可以选用丙烯酸酯类胶、聚氨酯热熔结构胶以及乙烯及其共聚物类热熔结构胶。
如图3所示，延伸边4具有与切面41均相接的两个侧面42，两个侧面42在延伸边4的厚度方向上相对分布，为了降低主胶体5从切面41上脱落的风险，主胶体5可 以部分或全部的覆盖在至少一个侧面42上。
根据一个实施例，主胶体5可以仅在一个侧面42上延伸，而在另一侧面42上不延伸。根据另一个实施例，主胶体5可以仅覆盖其中的一个侧面42的一部分，而不是覆盖整个侧面42。在其它一些实施例中，主胶体5也可以分别在两个侧面42上延伸并完全覆盖在两个侧面42上。上述的实施例，都可以使得主胶体5与延伸边4的连接面积增大，连接强度增加，从而增加主胶体5与切面41的连接强度。
在图3所示出的实施例中，主胶体5分别向两个侧面42延伸，并且覆盖在两个侧面42上的一部分区域上，在两个侧面42上的主胶体5的延伸部分为对称结构。
且优选地，设置主胶体5覆盖在侧面42上的厚度值h3的范围为大于并等于5μm，此处“厚度值h2”指的是主胶体5在侧面42上任一处的厚度值，在此范围内，可有效提升主胶体5的粘接强度并保证在侧面42上的胶线连续平整，外观良好。关于主胶体5覆盖在侧面42上的厚度值h3，发明人进行多次试验，下表是相关试验数据。设定主胶体5覆盖在侧面42上的长度h2为50μm。
表2
Figure PCTCN2016098850-appb-000002
根据表2中所示试验数据，可知：在设定主胶体5覆盖在侧面42上的长度h2均为50μm的前提下，当主胶体5覆盖侧面42上的厚度值h3大于并等于5μm时，粘接强度有明显提升，且胶线外观连续平整，无外观坏品。
根据表2所示的试验数据可知，本发明中的主胶体5覆盖侧面42上的厚度值h3的范围可以设置在大于等于5μm，进一步的优选方案是大于等于10μm。
另外，覆盖在侧面42上的主胶体5从切面41向靠近封装腔室的一侧延伸的长度h2优选大于并等于覆盖在切面41上的主胶体5的厚度h1的1/5，在此范围内，可有效提升主胶体5的粘接强度，并保证在侧面42上的胶线连续平整，外观良好。关于主胶体5侧面42上的长度值h2，发明人进行多次试验，下表是相关试验数据。其中，设定h1为100μm，h3为10μm。
表3
Figure PCTCN2016098850-appb-000003
根据表3中所示试验数据，可知：在设定主胶体5覆盖在切面41上的厚度值h1为100μm且厚度h3为10μm的前提下，当主胶体5从切面41向靠近封装腔室的一侧延伸的长度h2≥20μm(即大于等于h1的1/5)时，粘接强度有明显提升且胶线外观连续平整无外观坏品。
根据表3所示的试验数据可知，本发明中的主胶体5从切面41向靠近封装腔室的一侧延伸的长度h2的范围可设置在大于并等于覆盖在切面41上的主胶体5的厚度h1的1/5，进一步的优选方案是大于等于厚度h1的2/5。
还可以通过在延伸边4上开设通孔43的方式增加主胶体5与切面41的粘接牢固度，根据一个实施例，将通孔43设置在侧面42上，并分别贯穿两个侧面42，主胶体5向其中一个侧面42延伸并进入通孔43。在这一方案中，通孔43以及主胶体5形成类似销孔与销钉的结构，使得主胶体5从切面41上脱落的风险进一步降低。通孔43可以设置为圆孔，也可以设置为多边形孔，本申请对此不作限定。
在图4-5所示的实施例中，主胶体5分别向两个侧面42延伸，并且两个侧面42上 的主胶体5经由通孔43相接，如此设置后，穿过通孔43的主胶体5具有连接桥的作用，将覆盖在两个侧面42上的主胶体5连接在一起，其连接可靠性进一步提高。
切面41为延伸面，其沿着封装腔室的周向延伸，因此，可得到进一步的优选方案，如图4所示，可在延伸边4上设置多个通孔43，并将这些通孔43沿切面41的延伸方向排布，且主胶体5进入每一个通孔43中。这样，在切面41全部的延伸长度上，主胶体5均能够与切面41保持牢固的粘接力。
在图4-5所示的实施例中，当通孔43贯穿侧面42时，会有新的金属层暴露出来，为了避免不必要的缺陷，穿过通孔43的主胶体5优选覆盖在通孔43的整个内壁上，以可靠地将暴露出来的金属层全部包裹起来。
减少主胶体5从延伸边4上脱落的风险的实施方式不仅限于图3-5中所示出的方案，在其它一些实施例中，还可以在侧面42上设置凹部，主胶体5可以沿侧面42延伸并填充在凹部内。这样，凹部内就会聚集较多的主胶体5，由于胶体聚拢的特性，邻近凹部的主胶体5受到聚集在凹部内的主胶体5的吸引力，该吸引力使得覆盖在切面41上的主胶体5受到有利于其与切面41之间粘接牢固度的作用力。
本申请对主胶体5的形状不作限定，主胶体5的横截面的外轮廓线可以包括如下三者中的任意一者，即，圆形轮廓线的一部分、椭圆形轮廓线的一部分以及方形轮廓线的一部分，主胶体5的横截面的外轮廓线线的形状与出胶口的形状相关，上述外轮廓线的形状可以使得出胶口的结构简单。当然，主胶体5的横截面的外轮廓线可以设置为其它不规则的形状。
在图1-5所示的实施例中，延伸边4从封装腔室向外沿直线方向延伸。但大多数情况下，电池通常作为电子设备，例如移动电话、手提电脑等的电源被装配在电子设备的内部，用于容纳电池的装配空间受到很多局限。为了满足装配空间的设计需求，可以设置延伸边4向一侧弯折，以减小延伸边4占用的空间。
延伸边4弯折的设置方案有多种，例如，当延伸边4向一侧弯折时，可以使延伸边4的其中一个侧面42上远离封装腔室的一部分区域朝向第一包装膜1的其中一侧表面。又如，当延伸边4向一侧弯折时，也可以使延伸边4的其中一个侧面42全部朝向第一包装膜1的其中一侧表面。在其它一些实施例中，当延伸边4向一侧弯折时，还可以使其中一个侧面42上远离封装腔室的一部分区域与该侧面42的另一部分区域贴合，即，将延伸边4的端部翻折180°等等，上述各实施例都能够减少延伸边4占用的空间，以减小电池的体积。
此外，当侧面42朝向第一包装膜1的其中一侧表面时，侧面42与第一包装膜1的其中一侧表面的相对位置可以是倾斜的，也可以是平行的。当两者平行设置时，较倾斜的方式相比，可使得延伸边4占用的空间有进一步的减小。
如图6所示，图6示出了延伸边4向一侧弯折时的较佳方案，延伸边4的其中一个侧面42全部朝向第一包装膜1沿裸电芯3厚度方向(图6中X方向)延伸的表面11。这样设置的好处在于，电子厂商为了追求产品的小型化，通常将产品做的很薄，这会限制容纳电池的容纳槽的深度尺寸，且对深度尺寸控制的比较严格，与电池的装配余量也比较小。鉴于此，在图6所示的实施例中，延伸边4向一侧弯折，使得整个侧面42朝向第一包装膜1的表面11。这样，延伸边4就不会占用电池容纳槽的深度方向的空间，避免装配过程中的干涉，且更好的适用容纳槽的设计需求。
更优地，在图6所示的实施例中，还进一步优选侧面42与表面11相互平行，此方案中，延伸边4占用的空间更进一步减小。
当然，延伸边4向一侧弯折的结构不仅限于图6所示出的方案，例如，在其它一些实施例中，延伸边4的其中一个侧面42也可以朝向在裸电芯3厚度方向上相对分布的其它两个表面12。
如图6所示，还可以优选设置延伸边4与封装腔室相连接的部位位于裸电芯3沿厚度方向延伸的表面11的一侧边缘，由于延伸边4在裁切时存在尺寸上的偏差，这样的设置后，当延伸边4向表面11的一侧弯折时，即使裁切后的延伸边4从封装腔室延伸出来的尺寸偏向正差，但是，通过将延伸边4设置在上述的位置，就可以降低延伸边4超出裸电芯3的厚度的风险。反之，如果将延伸边4与封装腔室相连接的部位设置在表面11的中间部位，则延伸边4向表面11的一侧弯折时，延伸边4超出裸电芯3的厚度的风险加大。
并且，将第一包装膜1上的表面11作为投影面，且将与该投影面相对应的延伸边4以及主胶体5沿垂直于该投影面的方向在该投影面上投影，所得到的延伸边4以及主胶体5的投影位于该投影面的范围内。这样，可以确保延伸边4和覆盖在切面41上的主胶体5不会超过裸电芯3的厚度。
同样地，对于图1-5中所示出的延伸边4，也可以采用上述的设置方案，以保证延伸边4以及主胶体5不会造成裸电芯3厚度方向上尺寸的增加，避免与电子设备装配时造成干涉。
如图7所示，在本申请提供的实施例中，电池中还可以包括固定胶体6，固定胶体 6用于固定延伸边4，当延伸边4朝向第一包装膜1的一侧弯折时，延伸边4通过固定胶体6固定在第一包装膜1上。延伸边4被固定在第一包装膜1上可以减小延伸边4的占用空间，增加电池结构的紧凑性，有利于提高电池的能量密度。
固定胶体6优选以涂覆的方式涂覆在侧面42或第一包装膜1上的涂胶层，固定胶体6可以选用绝缘胶，例如，热熔胶或光敏胶等。另外，还可以优选丙烯酸酯类胶、聚氨酯热熔结构胶以及乙烯及其共聚物类热熔结构胶。此外，固定胶体6还可以通过注塑的方式设置在侧面42或第一包装膜1上的注塑胶层。
实施例一，固定胶体6可以将侧面42上的一部分区域上设置固定胶体6，并通过固定胶体6将该部分区域固定在第一包装膜1上。实施例二，还可以在整个侧面42上设置固定胶体6，并通过固定胶体6将该侧面42固定在第一包装膜1上，图7中示出了实施例一的方案。图7中的固定胶体6在侧面42以及第一包装膜1之间的厚度尺寸为h4，固定胶体6在侧面42上延伸的长度尺寸为h5。
较佳地，还可以将固定胶体6与主胶体5相接，固定胶体6与主胶体5接合成一体，使得延伸边4与第一包装膜1的固定更加可靠，减少延伸边4由于粘接不牢从第一包装膜1上张开的风险。
在本申请中，为了进一步验证本申请所提供的技术方案的有益效果，根据改进后的技术方案制作电池的测试样件1#～3#，根据在先技术制作电池的测试样件4#，测试样件1#～4#的数量各为100只，并进行比较测试。
以某型号的电池为例(电池厚度3.3mm，电池宽度99mm，电池长度125mm)采用叠片工艺制备电池。
测试样件1#
根据裸电芯3的尺寸，在厚度为60μm第一包装膜1上冲压出凹槽，并将裸电芯3置放于该凹槽内，随后第二包装膜2叠置在第一包装膜1上并封闭凹槽，四周边缘相贴合。凹槽处形成为封装腔室，四周边缘处形成为延伸边4。采用热封头对延伸边4进行封装，随后经过干燥、注液、静置、化成、抽液热封等一系列工序获得封装好的电池。裁切延伸边4，去除延伸边4上多余的部分，裁切后，延伸边4从封装腔室向外延伸出来的长度为2.8mm。将主胶体5(改性丙烯酸酯胶)覆盖在延伸边4的切面41上，随后进行光照固化，且固化后的涂胶层h1为0.20mm，h2为0.6mm，h3为0.05mm。设置固定胶体6(聚氨酯热熔结构胶)，固定胶体6设置在延伸边4上距离切面41为1.2mm的部位处，然后将延伸边4向第一包装膜1翻折施压并通过固定胶体6固定在第一包 装膜1上，h4为0.1mm，h5为1mm。
测试样件2#
在测试样件1#的基础上，在延伸边4上开设直径为0.3mm且间距为10mm的通孔43，通孔43贯穿侧面42，主胶体5延伸并进入通孔43内。
测试样件3#
在测试样件1#的基础上，设置h1为0.20mm，h2为1.5mm，h3为0.1mm。固定胶体6(改性丙烯酸酯胶)设置在延伸边4上距离切面41为1.2mm的部位处，然后将延伸边4向第一包装膜1翻折施压并通过固定胶体6固定在第一包装膜1上，h4为0.1mm，h5为1mm。
测试样件4#
采用多条U型绝缘胶质包裹异形电芯的切面41，随后将延伸边4翻折，通过绝缘胶纸的双面胶将延伸边4粘接在包装膜上。
对上述测试样件进行高温高湿存储测试，测量电池在延伸边4的延伸方向上的增大值，观察延伸边4的切面41有无金属层外露情况，下表是相关的实验数据。
表4
Figure PCTCN2016098850-appb-000004
根据表4所示的数据可知，测试样件1#～3#未出现金属层暴露情况，合格率100％。电池在延伸边4的延伸方向上的增大值小于0.05mm。
测试样件4#出现了金属层暴露的情况，不合格率100％。因此，相比之下，本申请实施例提供的方案获得了显著的技术进步和良好的技术效果。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技 术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (18)

  1. 一种电池，包括裸电芯、第一包装膜以及第二包装膜，所述第一包装膜以及所述第二包装膜的边缘处相互贴合形成封装腔室以及由所述封装腔室向外延伸的延伸边，所述裸电芯被封装在所述封装腔室内，
    所述延伸边具有切面，
    其特征在于，
    所述电池还包括主胶体，所述主胶体覆盖在所述切面上，所述主胶体覆盖在所述切面上的厚度值h1的范围为大于等于5μm且小于等于所述电池的厚度h的1/2。
  2. 根据权利要求1所述的电池，其特征在于，所述延伸边具有与所述切面均相接且沿所述延伸边的厚度方向相对分布的两个侧面，所述主胶体向所述侧面延伸并覆盖所述侧面。
  3. 根据权利要求2所述的电池，其特征在于，所述侧面具有凹部，所述主胶体向所述侧面延伸并填充于所述凹部内。
  4. 根据权利要求2所述的电池，其特征在于，所述延伸边上开设有至少一个通孔，所述通孔贯穿两个所述侧面，所述主胶体向所述侧面延伸并进入所述通孔中。
  5. 根据权利要求4所述的电池，其特征在于，所述主胶体分别向两个所述侧面延伸，两个所述侧面上的所述主胶体经由所述通孔相接。
  6. 根据权利要求4所述的电池，其特征在于，所述通孔的数量为多个，多个所述通孔沿所述切面的延伸方向排布，且所述主胶体进入每个所述通孔中。
  7. 根据权利要求2所述的电池，其特征在于，所述延伸边向一侧弯折，使其中一个所述侧面上的至少一部分区域朝向所述第一包装膜的其中一侧表面，该表面为沿所述裸电芯厚度方向延伸的表面，且所述一部分区域为所述侧面远离所述封装腔室的一部分区域。
  8. 根据权利要求7所述的电池，其特征在于，所述侧面上的至少一部分区域与所述表面平行。
  9. 根据权利要求2所述的电池，其特征在于，所述延伸边向一侧弯折，使其中一个所述侧面上的一部分区域与该侧面的另一部分区域贴合，所述一部分区域为所述侧面远离所述封装腔室的一部分区域。
  10. 根据权利要求7所述的电池，其特征在于，所述延伸边与所述封装腔室相连接的部位位于沿所述裸电芯厚度方向延伸的表面的一侧边缘。
  11. 根据权利要求7所述的电池，其特征在于，还包括固定胶体，所述延伸边通过所述固定胶体固定在所述第一包装膜上。
  12. 根据权利要求11所述的电池，其特征在于，所述固定胶体为涂胶层或注塑胶层。
  13. 根据权利要求12所述的电池，其特征在于，所述侧面上的至少一部分区域通过所述固定胶体固定在所述第一包装膜上。
  14. 根据权利要求2所述的电池，其特征在于，覆盖在所述侧面上的所述主胶体从所述切面向靠近所述封装腔室的一侧延伸的长度h2大于并等于覆盖在所述切面上的所述主胶体厚度h1的1/5。
  15. 根据权利要求2所述的电池，其特征在于，覆盖在所述侧面上的所述主胶体的厚度值h3的范围值为大于等于5μm。
  16. 根据权利要求7-15任一项所述的电池，其特征在于，将所述第一包装膜的其中一个表面作为投影面，且将与该投影面相对应的所述延伸边以及所述主胶体沿垂直于该投影面的方向在该投影面上投影，所得到的所述延伸边以及所述主胶体的投影位于该投影面的范围内。
  17. 根据权利要求1所述的电池，其特征在于，所述主胶体的横截面的外轮廓线为如下三者中的任意一者：
    圆形轮廓线的一部分；
    椭圆形轮廓线的一部分；
    方形轮廓线的一部分。
  18. 根据权利要求1所述的电池，其特征在于，所述主胶体为涂胶层或注塑胶层。
PCT/CN2016/098850 2016-09-13 2016-09-13 电池 WO2018049561A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/098850 WO2018049561A1 (zh) 2016-09-13 2016-09-13 电池

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/098850 WO2018049561A1 (zh) 2016-09-13 2016-09-13 电池

Publications (1)

Publication Number Publication Date
WO2018049561A1 true WO2018049561A1 (zh) 2018-03-22

Family

ID=61618630

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/098850 WO2018049561A1 (zh) 2016-09-13 2016-09-13 电池

Country Status (1)

Country Link
WO (1) WO2018049561A1 (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111063938A (zh) * 2019-12-05 2020-04-24 惠州锂威新能源科技有限公司 一种二封工序新折边工艺
CN111952655A (zh) * 2019-05-17 2020-11-17 宁德时代新能源科技股份有限公司 二次电池
CN112448070A (zh) * 2019-08-29 2021-03-05 东莞新能德科技有限公司 电芯结构及具有该电芯结构的电池
CN112567561A (zh) * 2018-09-04 2021-03-26 苹果公司 用于电池单元封装的方法和构型
CN112768779A (zh) * 2021-01-12 2021-05-07 天津市捷威动力工业有限公司 一种新型软包动力电芯封头
CN113097608A (zh) * 2021-03-29 2021-07-09 珠海冠宇电池股份有限公司 一种电池
CN113826275A (zh) * 2020-03-31 2021-12-21 宁德新能源科技有限公司 电池封装结构

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004055467A (ja) * 2002-07-23 2004-02-19 Nissan Motor Co Ltd 積層型電池の密封構造
JP2004087422A (ja) * 2002-08-29 2004-03-18 Matsushita Electric Ind Co Ltd ポリマー電池とその絶縁被覆形成方法及び装置
JP2006310039A (ja) * 2005-04-27 2006-11-09 Dainippon Printing Co Ltd 電池の外装体構造
JP2008041494A (ja) * 2006-08-08 2008-02-21 Densei Lambda Kk 電池セル及び電池パック構造
CN202134624U (zh) * 2011-06-10 2012-02-01 东莞新能源科技有限公司 软包装锂电池封边固定结构
CN102651460A (zh) * 2011-02-24 2012-08-29 三星Sdi株式会社 袋型电池及其制造方法
CN102714285A (zh) * 2010-01-19 2012-10-03 英耐时有限公司 片状二次电池及其制造方法
CN205122651U (zh) * 2015-11-02 2016-03-30 宁德新能源科技有限公司 软包装锂离子电池

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004055467A (ja) * 2002-07-23 2004-02-19 Nissan Motor Co Ltd 積層型電池の密封構造
JP2004087422A (ja) * 2002-08-29 2004-03-18 Matsushita Electric Ind Co Ltd ポリマー電池とその絶縁被覆形成方法及び装置
JP2006310039A (ja) * 2005-04-27 2006-11-09 Dainippon Printing Co Ltd 電池の外装体構造
JP2008041494A (ja) * 2006-08-08 2008-02-21 Densei Lambda Kk 電池セル及び電池パック構造
CN102714285A (zh) * 2010-01-19 2012-10-03 英耐时有限公司 片状二次电池及其制造方法
CN102651460A (zh) * 2011-02-24 2012-08-29 三星Sdi株式会社 袋型电池及其制造方法
CN202134624U (zh) * 2011-06-10 2012-02-01 东莞新能源科技有限公司 软包装锂电池封边固定结构
CN205122651U (zh) * 2015-11-02 2016-03-30 宁德新能源科技有限公司 软包装锂离子电池

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112567561A (zh) * 2018-09-04 2021-03-26 苹果公司 用于电池单元封装的方法和构型
CN111952655A (zh) * 2019-05-17 2020-11-17 宁德时代新能源科技股份有限公司 二次电池
CN111952655B (zh) * 2019-05-17 2024-01-26 宁德时代新能源科技股份有限公司 二次电池
CN112448070A (zh) * 2019-08-29 2021-03-05 东莞新能德科技有限公司 电芯结构及具有该电芯结构的电池
CN111063938A (zh) * 2019-12-05 2020-04-24 惠州锂威新能源科技有限公司 一种二封工序新折边工艺
CN113826275A (zh) * 2020-03-31 2021-12-21 宁德新能源科技有限公司 电池封装结构
CN112768779A (zh) * 2021-01-12 2021-05-07 天津市捷威动力工业有限公司 一种新型软包动力电芯封头
CN113097608A (zh) * 2021-03-29 2021-07-09 珠海冠宇电池股份有限公司 一种电池
WO2022206383A1 (zh) * 2021-03-29 2022-10-06 珠海冠宇电池股份有限公司 一种电池

Similar Documents

Publication Publication Date Title
WO2018049561A1 (zh) 电池
US11081749B2 (en) Battery and manufacturing method for the same
US11362363B2 (en) Battery
CN211295152U (zh) 电池
CN209487589U (zh) 极耳结构及电池
CN112086585B (zh) 电池
WO2024099099A1 (zh) 电池
WO2021189264A1 (zh) 电化学装置和电子装置
JP7482248B2 (ja) 電池セルおよびこれを適用した電気化学装置
KR100731436B1 (ko) 파우치형 리튬 이차 전지
CN217641490U (zh) 一种电池保护板及电池
WO2021109670A1 (zh) 封装结构及应用所述封装结构的电芯
CN113629040B (zh) 显示装置
US20210344073A1 (en) Battery
CN113474937B (zh) 电池及应用所述电池的电子装置
AU2020100217A4 (en) Battery structure
CN219267770U (zh) 一种电池
CN112448070A (zh) 电芯结构及具有该电芯结构的电池
CN217133926U (zh) 一种减小fpc弯折应力的显示模组
CN112397851B (zh) 电芯结构及具有该电芯结构的电池结构
CN217386079U (zh) 一种提升fog绑定位强度的液晶显示模组
CN214672783U (zh) 电池和用电设备
CN219457787U (zh) 一种电池和电子设备
CN209912900U (zh) 封装封头
CN216488201U (zh) 一种电池

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16915947

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16915947

Country of ref document: EP

Kind code of ref document: A1