WO2023020533A1 - 封装壳、电池及用电设备 - Google Patents

封装壳、电池及用电设备 Download PDF

Info

Publication number
WO2023020533A1
WO2023020533A1 PCT/CN2022/112999 CN2022112999W WO2023020533A1 WO 2023020533 A1 WO2023020533 A1 WO 2023020533A1 CN 2022112999 W CN2022112999 W CN 2022112999W WO 2023020533 A1 WO2023020533 A1 WO 2023020533A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
sealing
polymer layer
packaging case
tab
Prior art date
Application number
PCT/CN2022/112999
Other languages
English (en)
French (fr)
Inventor
袁秀兰
Original Assignee
宁德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 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 JP2022569630A priority Critical patent/JP2023541747A/ja
Priority to EP22857844.9A priority patent/EP4207447A1/en
Priority to CN202280013783.XA priority patent/CN117223156A/zh
Publication of WO2023020533A1 publication Critical patent/WO2023020533A1/zh
Priority to US18/128,593 priority patent/US20230238668A1/en

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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • H01M50/186—Sealing members characterised by the disposition of the 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
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • 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
    • H01M50/19—Sealing members characterised by the material
    • H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/121—Organic material
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • 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 technical field of batteries, and in particular to a packaging case, a battery and electrical equipment.
  • a battery generally includes a battery cell and a packaging case for containing the battery cell.
  • the existing packaging case is generally a metal structure, and the packaging case is usually charged during the packaging process. Among them, some package shell bodies have one polarity, and the other polarity is drawn out through poles. There are also two upper and lower shells with different polarities, which are isolated by insulating sheets during the period. In order to improve the safety of the battery composed of the packaging case and the battery cell, it is necessary to insulate the packaging case additionally, and it is also necessary to timely release the gas in the packaging case by etching a weak area on the packaging case as a pressure relief valve. higher cost.
  • Embodiments of the present application provide a packaging case for packaging electric cores.
  • the battery core includes an electrode assembly and tabs electrically connected to the electrode assembly
  • the packaging case includes a casing, a cover, and a polymer layer.
  • the housing is provided with a housing part for housing the electrode assembly.
  • the tab extends from the housing part to the outside of the housing.
  • the housing is also provided with a first sealing part extending from the edge of the opening of the housing part along a first direction to the outside of the housing.
  • the cover body is provided with a second sealing portion extending along the first direction.
  • the cover body covers the opening of the accommodating part, and the first sealing part and the second sealing part are oppositely arranged.
  • the polymer layer is disposed between the first sealing part and the second sealing part. The polymer layer is used to seal the gap between the first sealing part and the second sealing part, and when the pressure of the gas generated by the electric core in the packaging case exceeds a threshold value, the polymer layer is also used to release the
  • the technical effect included in the embodiments of the present application is that the sealing performance of the packaging case is improved through the relative arrangement of the first sealing part and the second sealing part, and the arrangement of the polymer layer between the first sealing part and the second sealing part. And when the pressure of the gas generated by the cell in the packaging case exceeds the threshold value, the polymer layer is also used to release the gas in the packaging case, which can timely release the pressure of the packaging case and improve the safety during use.
  • the packaging case of the embodiment of the present application can reduce production costs while improving safety.
  • the tabs protrude from the polymer layer to the outside of the casing, so as to improve the sealing performance between the tabs and the packaging case.
  • the edge of the opening of the accommodating portion includes a first edge and a second edge connected end to end, the first sealing portion is extended from the first edge along the first direction, and the housing is further provided with a first connection area, The first connection area is arranged on the second edge, and the surface of the cover facing the accommodating part is provided with a second connection area overlapping with the first connection area, and the first connection area and the second connection area form a welding connection layer by welding to improve the The stability of the connection and seal between the cover and the housing. And by setting the first connection area on the second edge, the edge of the opening is fully utilized to face the surface of the cover plate. Compared with the way of folding, the occupied space of the package case is reduced, and the energy density of the battery is improved.
  • the second edge of the opening of the accommodating portion is folded outward to form a folded portion
  • the first connection area is disposed on a surface of the folded portion facing the cover.
  • the contact area between the housing and the cover is increased by the folded portion, thereby increasing the contact area between the first connection area and the second connection area, and further improving the stability of connection and sealing between the cover and the housing.
  • the housing is further provided with a first dispensing area.
  • the first glue dispensing area is set at the intersection area of the first edge and the second edge.
  • a second glue dispensing area overlapping with the first glue dispensing area is provided on the surface of the cover body facing the accommodating portion.
  • the first dispensing area and the second dispensing area form a dispensing connection layer by dispensing to improve the stability of the connection and sealing between the cover and the shell in the corresponding transfer area, thereby improving the connection between the welding connection layer and the melting layer. Stability of junction connections and seals.
  • the packaging case further includes a tab glue layer, the tab glue layer is disposed between the polymer layers, and the tab passes through the tab glue layer to the outside of the housing.
  • the tab glue layer is used to improve the sealing performance between the tab and the polymer layer.
  • the first sealing part includes a first surface and a second surface.
  • the first surface faces the second sealing part, and the second surface is connected to a side of the first surface away from the accommodating part.
  • the first surface and the second surface are sunken to form a first stepped surface.
  • the first stepped surface is hermetically connected to the polymer layer, and when the pressure of the gas generated by the cell in the packaging case exceeds a threshold value, the polymer layer is punched through the opening on the second surface of the first stepped surface to release the packaging case
  • the gas in the battery improves the safety of the battery during use.
  • the second sealing part includes a third surface and a fourth surface.
  • the third surface faces the first surface, and the fourth surface is connected to a side of the third surface corresponding to the second surface.
  • the third surface and the fourth surface are sunken to form a second stepped surface.
  • the second stepped surface is hermetically connected to the polymer layer, and when the pressure of the gas generated by the cell in the packaging case exceeds a threshold value, the polymer layer is punched through the opening on the fourth surface of the second stepped surface to release the packaging case
  • the gas in the battery improves the safety of the battery during use.
  • Embodiments of the present application also provide a battery, including a battery cell and any packaging case in the above embodiments.
  • Embodiments of the present application also provide an electrical device, including any battery in the foregoing embodiments.
  • the first sealing part and the second sealing part are arranged oppositely, and the polymer layer is arranged on the first sealing part and the second sealing part Between, improve the sealing performance of the package. And when the pressure of the gas generated by the cell in the packaging case exceeds the threshold value, the polymer layer is also used to release the gas in the packaging case, which can timely release the pressure of the packaging case and improve the safety during use.
  • the packaging case of the embodiment of the present application can reduce production costs while improving safety.
  • FIG. 1 is a schematic diagram of a first structure of an encapsulation case according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a first cross-sectional structure of a packaging case according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a first structure of a casing in a package according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a first structure of a cover in a packaging case according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a second cross-sectional structure of the packaging case according to an embodiment of the present application.
  • FIG. 6 is a schematic cross-sectional structure diagram of a housing and a cover in a packaging case according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a second structure of an encapsulation case according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a third structure of an encapsulation case according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a second structure of a case in a package according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of the second structure of the cover in the packaging case according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a fourth structure of an encapsulation case according to an embodiment of the present application.
  • the first dispensing area 15 The first dispensing area 15
  • Embodiments of the present application provide a packaging case for packaging electric cores.
  • the battery core includes an electrode assembly and tabs electrically connected to the electrode assembly
  • the packaging case includes a casing, a cover, and a polymer layer.
  • the housing is provided with a housing part for housing the electrode assembly.
  • the tab extends from the housing part to the outside of the housing.
  • the housing is also provided with a first sealing part extending from the edge of the opening of the housing part along a first direction to the outside of the housing.
  • the cover body is provided with a second sealing portion extending along the first direction.
  • the cover body covers the opening of the accommodating part, and the first sealing part and the second sealing part are oppositely arranged.
  • the polymer layer is disposed between the first sealing part and the second sealing part. The polymer layer is used to seal the gap between the first sealing part and the second sealing part, and when the pressure of the gas generated by the electric core in the packaging case exceeds a threshold value, the polymer layer is also used to release the
  • the first sealing part and the second sealing part are arranged oppositely, and the polymer layer is arranged on the first sealing part and the second sealing part Between, improve the sealing performance of the package. And when the pressure of the gas generated by the cell in the packaging case exceeds the threshold value, the polymer layer is also used to release the gas in the packaging case, which can timely release the pressure of the packaging case and improve the safety during use.
  • the packaging case of the embodiment of the present application can reduce production costs while improving safety.
  • the embodiment of the present application provides a packaging case 100 for packaging a battery cell 90 .
  • the battery cell 90 includes an electrode assembly 91 and a tab 92 electrically connected to the electrode assembly 91 .
  • the electrode assembly 91 can be formed by winding or stacking positive electrode sheets, separators and negative electrode sheets arranged in sequence.
  • the packaging case 100 includes a housing 10 , a cover 20 and a polymer layer 30 .
  • the housing 10 is provided with a housing portion 11 for housing the electrode assembly 91 .
  • the accommodating portion 11 is a recess provided on the housing 10 , and the electrode assembly 91 is put into the housing 10 from the opening 12 of the accommodating portion 11 (ie, the opening of the recess).
  • the tab 92 extends from the receiving portion 11 to the outside of the housing 10 .
  • the casing 10 is further provided with a first sealing portion 13 extending from the edge of the opening 12 of the receiving portion 11 along the first direction A to the outside of the casing 10 .
  • the cover body 20 is provided with a second sealing portion 21 extending along the first direction A. As shown in FIG. The cover body 20 covers the opening 12 of the containing portion 11 for protecting the electrode assembly 91 in the containing portion 11 .
  • the first sealing portion 13 and the second sealing portion 21 are oppositely disposed.
  • the polymer layer 30 is disposed between the first sealing portion 13 and the second sealing portion 21, the polymer layer 30 is used to seal the gap between the first sealing portion 13 and the second sealing portion 21, and when the electric core 90 is packaged
  • the polymer layer 30 is also used to release the gas in the encapsulation case 100 when the pressure of the gas generated in the case 100 exceeds a threshold value.
  • the threshold value is the pressure value of the gas generated in the packaging case 100 when the battery cell 90 is thermally out of control.
  • the melting point of the polymer layer 30 is not higher than the temperature generated when the electric core 90 is thermally runaway.
  • the thermal runaway of the electric core 90 increases the air pressure in the packaging case 100, the polymer layer 30 is heated and melted so that the first sealing part 13 and If the seal between the second sealing parts 21 fails, the pressure of the packaging case 100 can be released in time to improve the safety during use.
  • the melting point of the polymer layer 30 is between 130°C and 150°C, specifically one of 130°C, 135°C, 140°C, 145°C, 150°C and the like.
  • the sealing performance of the package case 100 is improved by the first sealing portion 13 and the second sealing portion 21 being disposed opposite to each other, and the polymer layer 30 being disposed between the first sealing portion 13 and the second sealing portion 21 .
  • the polymer layer 30 is also used to release the gas in the packaging case 100 , which can timely release the pressure of the packaging case 100 and improve the safety during use.
  • the packaging case 100 of the embodiment of the present application can reduce production costs while improving safety.
  • the tab 92 is led out from between the first sealing portion 13 and the second sealing portion 21, and passes through the polymer layer 30 to the outside of the housing 10, so as to improve the tab 92.
  • the tab 92 protrudes from the polymer layer 30 along the first direction A. As shown in FIG.
  • the polymer layer 30 is provided with insulation, so that the tab 92 is kept insulated from the housing 10 and the cover 20, reducing the risk of electrical connection between the tab 92 and the housing 10 and the cover 20, and making the package 100 is not charged. In this way, the production cost of insulating the packaging shell is reduced, and the production efficiency can also be improved.
  • the polymer layer 30 includes a first melting layer 31 and a second melting layer 32 .
  • the first melting layer 31 is disposed on the surface of the first sealing portion 13 facing the second sealing portion 21 .
  • the second melting layer 32 is disposed on the surface of the second sealing portion 21 facing the first sealing portion 13 .
  • the first melting layer 31 and the second melting layer 32 are used to heat and melt to form the polymer layer 30 , and then seal the tab 92 and the gap between the first sealing portion 13 and the second sealing portion 21 .
  • the first melting layer 31 and the second melting layer 32 are heated and melted by heat pressing the first sealing part 13 and the second sealing part 21 .
  • the edge of the opening 12 of the receiving portion 11 includes a first edge 121 and a second edge 122 connected end to end.
  • the first sealing portion 13 extends along the first direction A from the first edge 121 .
  • the casing 10 also has a first connection area 14 disposed on the second edge 122 .
  • a second connection area 22 overlapping with the first connection area 14 is provided on the surface of the cover body 20 facing the accommodating portion 11 .
  • the first connection area 14 and the second connection area 22 form a welding connection layer by welding, so as to improve the stability of connection and sealing between the cover body 20 and the casing 10 .
  • the first connection area 14 is disposed on the second edge 122, and the surface of the edge of the opening 12 facing the cover 20 is fully utilized. Compared with the folding method, the occupied space of the packaging case 100 is reduced, and the energy density of the battery is improved.
  • the edge of the opening 12 is rectangular, the first edge 121 is one side of the rectangle, and the second edge is the other three sides of the rectangle.
  • the second edge 122 of the opening 12 of the receiving portion 11 is folded outward to form a folded portion (not shown), and the first connecting area 14 is disposed at the folded portion facing the cover 20 s surface.
  • the area of contact between the housing 10 and the cover 20 is increased by the folded portion, thereby increasing the area of contact between the first connection area 14 and the second connection area 22, and further improving the stability of the connection and seal between the cover 20 and the housing 10 sex.
  • the housing 10 is further provided with a first dispensing area 15 .
  • the first glue dispensing area 15 is disposed at the junction area 123 of the first edge 121 and the second edge 122 .
  • a second glue dispensing area 23 overlapping with the first glue dispensing area 15 is provided on the surface of the cover body 20 facing the receiving portion 11 .
  • the first dispensing area 15 and the second dispensing area 23 form a dispensing connection layer by dispensing, so as to improve the stability of connection and sealing between the cover body 20 and the housing 10 corresponding to the transfer area 123, and then improve the welding connection layer.
  • the package case 100 further includes a tab glue layer 50 .
  • the tab glue layer 50 is disposed between the polymer layers 30 , and the tab 92 passes through the tab glue layer 50 to the outside of the casing 10 .
  • the tab glue layer 50 is used to improve the sealing performance between the tab 92 and the polymer layer 30 .
  • the tab 92 passes through the tab glue layer 50 .
  • the first melting layer 31 , the second melting layer 32 and the tab glue layer 50 are used for thermal melting to seal the tab 92 and the gap between the first sealing portion 13 and the second sealing portion 21 .
  • the sealing performance between the tab 92 and the polymer layer 30 is improved, thereby further improving the sealing performance of the packaging case 100 .
  • the tab glue layer 50 has insulation properties, so that the tab 92 is kept insulated from the casing 10 and the cover 20, further reducing the risk of electrical connection between the tab 92 and the casing 10 and the cover 20, so that The package case 100 is not charged.
  • the first sealing portion 13 includes a first surface 131 and a second surface 132 .
  • the first surface 131 faces the second sealing portion 21 , and the second surface 132 is connected to a side of the first surface 131 away from the accommodating portion 11 .
  • the first surface 131 and the second surface 132 are sunken to form a first stepped surface 133 .
  • the first stepped surface 133 is sealed and connected to the polymer layer 30.
  • the first melting layer 31 is disposed on the first stepped surface 133 .
  • the first melting layer 31 is laid on the first step surface 133 and is flush with the first surface 131, so as to reduce the influence of the thickness of the first melting layer 31 on the flatness of the welding between the first connection area 14 and the second connection area 22 , the tab improves the stability of the connection and sealing between the cover body 20 and the housing 10 .
  • the second sealing portion 21 includes a third surface 211 and a fourth surface 212 .
  • the third surface 211 faces the first surface 131
  • the fourth surface 212 is connected to a side of the third surface 211 corresponding to the second surface 132 .
  • the third surface 211 and the fourth surface 212 are sunken to form a second stepped surface 213 .
  • the second stepped surface 213 is in sealing connection with the polymer layer 30 , and when the pressure of the gas generated by the electric core 90 in the package case 100 exceeds a threshold value, the polymer layer 30 rushes through the opening of the second stepped surface 213 on the fourth surface 212 . open, used to release the gas in the packaging case 100, and improve the safety of the battery during use.
  • the second melting layer 32 is disposed on the second stepped surface 213 .
  • the second molten layer 32 is laid on the second step surface 213 and is flush with the third surface 211, so as to reduce the influence of the thickness of the second molten layer 32 on the flatness of welding between the first connection area 14 and the second connection area 22 , the tab improves the stability of the connection and sealing between the cover body 20 and the housing 10 .
  • the first sealing portion 13 extends from the first edge 121 along the first direction A
  • the tab 92 extends from the second edge 122 to the outside of the casing 10 . That is, the tabs 92 protrude from the solder connection layer to the outside of the housing 10 .
  • the welding connection layer is used to improve the sealing performance between the tab 92 and the package case 100
  • the polymer layer 30 is used to seal the gap between the first sealing part 13 and the second sealing part 21, and when the electric core 90 is in the package case
  • the polymer layer 30 is also used to release the gas in the encapsulation case 100 when the pressure of the gas generated in the package 100 exceeds a threshold.
  • the tab 92 passes through the solder connection layer along the direction opposite to the first direction A. As shown in FIG.
  • both the first sealing part 13 and the second sealing part 21 are of split structure.
  • the first sealing portion 13 includes a first split body portion 13 a and a second split body portion 13 b arranged at intervals along the first direction A.
  • the second sealing part 21 includes a third split body part 21a and a fourth split body part 21b, and the third split body part 21a and the fourth split body part 21b are respectively arranged opposite to the first split body part 13a and the second split body part 13b .
  • a polymer layer 30 is disposed between the first split part 13 a and the third split part 21 a and a tab 92 passes through the polymer layer 30 .
  • a polymer layer 30 is provided between the second split part 13b and the fourth split part 21b and another tab 92 passes through, so as to reduce the occupied space of the first sealing part 13 and the second sealing part 21, and improve the performance of the battery. Energy Density.
  • the exposed first edge 121 between the first split part 13a and the second split part 13b is sealed and connected to the corresponding area of the cover body 20 by welding and/or glue dispensing.
  • the surface of the first sealing portion 13 facing the second sealing portion 21 is provided with a first region 13c and a second region 13d.
  • the surface of the second sealing portion 21 facing the first sealing portion 13 is provided with a third area 21c and a fourth area 21d, which are respectively disposed opposite to the first area 13c and the second area 13d.
  • the polymer layer 30 is disposed between the first sealing portion 13 and the third region 21 c and allows the tab 92 to pass through.
  • the sealing connection between the second area 13d and the fourth area 21d is through welding and/or glue dispensing.
  • the first sealing portion 13 includes a first portion 13e and a second portion 13f, the first portion 13e extends along a first direction A, and the second portion 13f extends along a second direction B, wherein the second The direction B is the thickness direction of the electric core 90 , and the second direction B is perpendicular to the first direction A.
  • the second sealing part 21 includes a third part 21e and a fourth part 21f, which are disposed opposite to the first part 13e and the second part 13f, respectively.
  • the polymer layer 30 is disposed between the first sealing part 13 and the second sealing part 21 .
  • the tab 92 includes a fifth portion 92a and a sixth portion 92b, the fifth portion 92a extends along the first direction A, and the sixth portion 92b extends along the second direction B.
  • the fifth portion 92a passes through the polymer layer 30 between the first portion 13e and the third portion 21e, and the sixth portion 92b passes through the polymer layer 30 between the second portion 13f and the fourth portion 21f.
  • the extension lengths of the sixth portion 92 b , the second portion 13 f and the fourth portion 21 f along the second direction B are less than or equal to the thickness along the second direction B when the cover 20 is closed on the housing 10 .
  • the embodiment of the present application also provides a battery (not shown), including a battery cell 90 and a package case 100 .
  • the package case 100 is used to package the electric core 90, and the package case 100 may be any package case in the above-mentioned embodiments.
  • the battery further includes a circuit protection board (not shown), and the circuit protection board is used to monitor the voltage, current, insulation state and state of charge in the battery cell 90, and to safely manage the charging and discharging process of the battery. , carry out alarm and emergency protection processing for possible faults, and carry out safe and optimal control of battery operation.
  • An embodiment of the present application also provides an electric device (not shown), including any battery in the foregoing embodiments.
  • the first sealing part 13 and the second sealing part 21 are arranged oppositely, and the polymer layer 30 is arranged between the first sealing part 13 and the second sealing part 21, so as to improve the sealing of the packaging case 100 performance.
  • the polymer layer 30 is also used to release the gas in the packaging case 100 , which can timely release the pressure of the packaging case 100 and improve the safety during use.
  • the packaging case 100 of the embodiment of the present application can reduce production costs while improving safety.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

本申请公开了一种封装壳，用于封装电芯。电芯包括电极组件和与电极组件电连接的极耳，封装壳包括壳体、盖体和聚合物层。壳体设有容纳部，容纳部用于容纳电极组件，极耳从容纳部延伸至壳体外，壳体还设有自容纳部开口的边缘沿第一方向向壳体外延伸的第一密封部。盖体设有沿第一方向延伸的第二密封部。盖体盖设于容纳部开口，第一密封部和第二密封部相对设置。聚合物层设置于第一密封部与第二密封部之间。聚合物层用于密封第一密封部和第二密封部之间的间隙，且当电芯在封装壳内产生的气体的压力超过阈值时，聚合物层还用于释放封装壳内的气体。本申请还公开了采用上述封装壳的电池和用电设备，上述封装壳在提高密封性的同时还能降低生产成本。

Description

封装壳、电池及用电设备 技术领域
本申请涉及电池技术领域，尤其涉及一种封装壳、电池及用电设备。
背景技术
电池一般包括电芯和容纳电芯的封装壳，现有的封装壳一般为金属结构，在封装过程中封装壳通常带电。其中，有的封装壳本体是一个极性，另外一个极性通过极柱引出。也有的上下两个壳带不同的极性，期间通过绝缘片隔离。为了提高封装壳与电芯组成的电池的安全性，需要额外对封装壳做绝缘处理，并且还需要通过在封装壳上刻蚀薄弱区域作为泄压阀来及时泄掉封装壳内的气体，生产成本较高。
发明内容
有鉴于此，有必要提供一种能降低生产成本的封装壳，以及采用该封装壳的电池及用电设备。
本申请的实施例提供了一种封装壳，用于封装电芯。电芯包括电极组件和与电极组件电连接的极耳，封装壳包括壳体、盖体和聚合物层。壳体设有容纳部，容纳部用于容纳电极组件，极耳从容纳部延伸至壳体外，壳体还设有自容纳部开口的边缘沿第一方向向壳体外延伸的第一密封部。盖体设有沿第一方向延伸的第二密封部。盖体盖设于容纳部开口，第一密封部和第二密封部相对设置。聚合物层设置于第一密封部与第二密封部之间。聚合物层用于密封第一密封部和第二密封部之间的间隙，且当电芯在封装壳内产生的气体的压力超过阈值时，聚合物层还用于释放封装壳内的气体。
本申请的实施例包括的技术效果：通过第一密封部和第二密封部相对设置，以及聚合物层设置于第一密封部与第二密封部之间，提高封装壳的密封性能。且当电芯在封装壳内产生的气体的压力超过阈值时，聚合物层还用于释放封装壳内的气体，能够及时对封装壳泄压，提高使用时的安全性。与现有的通过在封装壳上设置泄压阀的方式相比，本申请实施例的封装壳在提高安全性的同时，能够降低生产成本。
本申请的一些实施例中，极耳从聚合物层穿出至壳体外，以提高极耳与封装壳之间的密封性能。
本申请的一些实施例中，容纳部开口的边缘包括首尾相连的第一边缘和第二边缘，第一密封部自第一边缘沿第一方向延伸设置，壳体还设有第一连接区，第一连接区设置于第二边缘上，盖体朝向容纳部的表面设有与第一连接区重叠的第二连接区，第一连接区和第二连接区通过焊接形成焊接连接层，以提高盖体与壳体之间连接和密封的稳定性。并且通过第一连接区设置于第 二边缘上，充分利用开口的边缘朝向盖板的表面，与折边的方式相比，减少封装壳的占用空间，提高电池能量密度。
本申请的一些实施例中，容纳部开口的第二边缘向外翻折形成翻折部，第一连接区设置于翻折部朝向盖体的表面。通过翻折部提高壳体与盖体接触的面积，进而可提高第一连接区和第二连接区接触的面积，进一步提高盖体与壳体之间连接和密封的稳定性。
本申请的一些实施例中，壳体还设有第一点胶区。第一点胶区设置于第一边缘和第二边缘的交接区域。盖体朝向容纳部的表面设有与第一点胶区重叠的第二点胶区。第一点胶区和第二点胶区通过点胶形成点胶连接层，以提高对应交接区域的盖体与壳体之间连接和密封的稳定性，进而提高焊接连接层和熔融层之间交接处连接和密封的稳定性。
本申请的一些实施例中，封装壳还包括极耳胶层，极耳胶层设置于聚合物层之间，极耳从极耳胶层穿出至壳体外。极耳胶层用于提高极耳与聚合物层之间的密封性能。
本申请的一些实施例中，第一密封部包括第一表面和第二表面。第一表面朝向第二密封部，第二表面连接于第一表面远离容纳部的一侧。第一表面和第二表面下沉形成第一台阶面。第一台阶面与聚合物层密封连接，当电芯在封装壳内产生的气体的压力超过阈值时，聚合物层通过第一台阶面位于第二表面上的开口冲开，用于释放封装壳内的气体，提高电池使用时的安全性。
本申请的一些实施例中，第二密封部包括第三表面和第四表面。第三表面朝向第一表面，第四表面连接于第三表面对应第二表面的一侧。第三表面和第四表面下沉形成第二台阶面。第二台阶面与聚合物层密封连接，当电芯在封装壳内产生的气体的压力超过阈值时，聚合物层通过第二台阶面位于第四表面上的开口冲开，用于释放封装壳内的气体，提高电池使用时的安全性。
本申请的实施例还提供了一种电池，包括电芯和上述实施例中任意一种的封装壳。
本申请的实施例还提供了一种用电设备，包括上述实施例中的任意一种电池。
本申请实施例提供的封装壳，及采用该封装壳的电池及用电设备中，通过第一密封部和第二密封部相对设置，以及聚合物层设置于第一密封部与第二密封部之间，提高封装壳的密封性能。且当电芯在封装壳内产生的气体的压力超过阈值时，聚合物层还用于释放封装壳内的气体，能够及时对封装壳泄压，提高使用时的安全性。与现有的通过在封装壳上设置泄压阀的方式相比，本申请实施例的封装壳在提高安全性的同时，能够降低生产成本。
附图说明
图1为本申请一实施例的封装壳的第一结构示意图。
图2为本申请一实施例的封装壳的第一剖视结构示意图。
图3为本申请一实施例的封装壳中壳体的第一结构示意图。
图4为本申请一实施例的封装壳中盖体的第一结构示意图。
图5为本申请一实施例的封装壳的第二剖视结构示意图。
图6为本申请一实施例的封装壳中的壳体和盖体的剖视结构示意图。
图7为本申请一实施例的封装壳的第二结构示意图。
图8为本申请一实施例的封装壳的第三结构示意图。
图9为本申请一实施例的封装壳中壳体第二结构示意图。
图10为本申请一实施例的封装壳中盖体第二结构示意图。
图11为本申请一实施例的封装壳的第四结构示意图。
主要元件符号说明
封装壳                       100
壳体                         10
容纳部                       11
开口                         12
第一边缘                     121
第二边缘                     122
交接区域                     123
第一密封部                   13
第一表面                     131
第二表面                     132
第一台阶面                   133
第一分体部                   13a
第二分体部                   13b
第一区域                     13c
第二区域                     13d
第一部分                     13e
第二部分                     13f
第一连接区                   14
第一点胶区                   15
盖体                         20
第二密封部                   21
第三表面                     211
第四表面                     212
第二台阶面                   213
第三分体部                   21a
第四分体部                   21b
第三区域                     21c
第四区域                     21d
第三部分                     21e
第四部分                      21f
第二连接区                    22
第二点胶区                    23
聚合物层                      30
第一熔融层                    31
第二熔融层                    32
极耳胶层                      50
电芯                          90
电极组件                      91
极耳                          92
第五部分                      92a
第六部分                      92b
第一方向                      A
第二方向                      B
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，当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中设置的元件。当一个元件被认为是“设置”在另一个元件，它可以是直接设置在另一个元件上或者可能同时存在居中设置的元件。
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。
可以理解，当两元件平行/垂直设置时，两元件之间的允许存在0-±10％的角度公差，即平行时存在±18°的角度公差，垂直时存在±9°的角度公差。某数值大于、等于或小于某一端点值，应该理为允许存在端点值的0-±10％的公差。
本申请的实施例提供了一种封装壳，用于封装电芯。电芯包括电极组件和与电极组件电连接的极耳，封装壳包括壳体、盖体和聚合物层。壳体设有容纳部，容纳部用于容纳电极组件，极耳从容纳部延伸至壳体外，壳体还设有自容纳部开口的边缘沿第一方向向壳体外延伸的第一密封部。盖体设有沿第一方向延伸的第二密封部。盖体盖设于容纳部开口，第一密封部和第二密封部相对设置。聚合物层设置于第一密封部与第二密封部之间。聚合物层用于密封第一密封部和第二密封部之间的间隙，且当电芯在封装壳内产生的气体的压力超过阈值时，聚合物层还用于释放封装壳内的气体。
本申请实施例提供的封装壳，及采用该封装壳的电池及用电设备中，通 过第一密封部和第二密封部相对设置，以及聚合物层设置于第一密封部与第二密封部之间，提高封装壳的密封性能。且当电芯在封装壳内产生的气体的压力超过阈值时，聚合物层还用于释放封装壳内的气体，能够及时对封装壳泄压，提高使用时的安全性。与现有的通过在封装壳上设置泄压阀的方式相比，本申请实施例的封装壳在提高安全性的同时，能够降低生产成本。
下面将结合附图对一些实施方式作详细说明。在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。
请一并参阅图1和图2，本申请实施例提供一种封装壳100，用于封装电芯90。电芯90包括电极组件91和与电极组件91电连接的极耳92。电极组件91可以通过依序设置的正极片、隔膜和负极片卷绕或堆叠而成。
封装壳100包括壳体10、盖体20和聚合物层30。壳体10设有容纳部11，容纳部11用于容纳电极组件91。在一些实施例中，容纳部11为设于壳体10上的凹部，电极组件91自容纳部11的开口12(即该凹部的开口)放入壳体10中。极耳92从容纳部11延伸至壳体10外。
壳体10还设有自容纳部11的开口12的边缘沿第一方向A向壳体10外延伸的第一密封部13。盖体20设有沿第一方向A延伸的第二密封部21。盖体20盖设于容纳部11的开口12，用于保护容纳部11中的电极组件91。第一密封部13和第二密封部21相对设置。
聚合物层30设置于第一密封部13与第二密封部21之间，聚合物层30用于密封第一密封部13和第二密封部21之间的间隙，且当电芯90在封装壳100内产生的气体的压力超过阈值时，聚合物层30还用于释放封装壳100内的气体。
在一些实施例中，阈值为电芯90热失控时在封装壳100内产生的气体的压力值。聚合物层30的熔点不高于电芯90热失控时产生的温度，当电芯90热失控使封装壳100内的气压增大时，聚合物层30受热熔融以使第一密封部13和第二密封部21之间的密封失效，能够及时对封装壳100泄压，提高使用时的安全性。
在一些实施例中，聚合物层30的熔点在130℃至150℃之间，具体可以为130℃、135℃、140℃、145℃、150℃等中的一种。
上述封装壳100中，通过第一密封部13和第二密封部21相对设置，以及聚合物层30设置于第一密封部13与第二密封部21之间，提高封装壳100的密封性能。且当电芯90在封装壳100内产生的气体的压力超过阈值时，聚合物层30还用于释放封装壳100内的气体，能够及时对封装壳100泄压，提高使用时的安全性。与现有的通过在封装壳上设置泄压阀的方式相比，本申请实施例的封装壳100在提高安全性的同时，能够降低生产成本。
请继续参阅图2，在一些实施例中，极耳92自第一密封部13和第二密封部21之间引出，并从聚合物层30穿出至壳体10外，以提高极耳92与封装壳100之间的密封性能。在一些实施例中，极耳92沿第一方向A从聚合物层30穿出。
在一些实施例中，聚合物层30具备绝缘性，以使极耳92与壳体10和盖体20保持绝缘，降低极耳92与壳体10和盖体20电连接的风险，使封装壳100不带电。由此降低对封装壳做绝缘处理的生产成本，还能够提高生产效率。
请继续参阅图2，在一些实施例中，聚合物层30包括第一熔融层31和第二熔融层32。第一熔融层31设置于第一密封部13朝向第二密封部21的表面。第二熔融层32设置于第二密封部21朝向第一密封部13的表面。第一熔融层31和第二熔融层32用于受热熔融形成聚合物层30，进而密封极耳92、以及第一密封部13和第二密封部21之间的间隙。在一些实施例中，通过热压第一密封部13和第二密封部21使第一熔融层31和第二熔融层32受热熔融。
请一并参阅图3和图4，在一些实施例中，容纳部11的开口12的边缘包括首尾相连的第一边缘121和第二边缘122。第一密封部13自第一边缘121沿第一方向A延伸设置。壳体10还设有第一连接区14，第一连接区14设置于第二边缘122上。盖体20朝向容纳部11的表面设有与第一连接区14重叠的第二连接区22。
第一连接区14和第二连接区22通过焊接形成焊接连接层，以提高盖体20与壳体10之间连接和密封的稳定性。并且通过第一连接区14设置于第二边缘122上，充分利用开口12的边缘朝向盖体20的表面，与折边的方式相比，减少封装壳100的占用空间，提高电池能量密度。
在一些实施例中，开口12的边缘呈矩形，第一边缘121为该矩形的一条边，第二边缘即为该矩形的另外三条边。
可以理解的是，在其他实施例中，容纳部11的开口12的第二边缘122向外翻折形成翻折部(未示出)，第一连接区14设置于翻折部朝向盖体20的表面。通过翻折部提高壳体10与盖体20接触的面积，进而可提高第一连接区14和第二连接区22接触的面积，进一步提高盖体20与壳体10之间连接和密封的稳定性。
在一些实施例中，壳体10还设有第一点胶区15。第一点胶区15设置于第一边缘121和第二边缘122的交接区域123。盖体20朝向容纳部11的表面设有与第一点胶区15重叠的第二点胶区23。
第一点胶区15和第二点胶区23通过点胶形成点胶连接层，以提高对应交接区域123的盖体20与壳体10之间连接和密封的稳定性，进而提高焊接连接层和聚合物层30之间交接处连接和密封的稳定性。
请参阅图5，在一些实施例中，封装壳100还包括极耳胶层50。极耳胶层50设置于聚合物层30之间，极耳92从极耳胶层50穿出至壳体10外。极耳胶层50用于提高极耳92与聚合物层30之间的密封性能。
具体在一些实施例中，极耳胶层50第一熔融层31和第二熔融层32之间，极耳92从极耳胶层50穿出。第一熔融层31、第二熔融层32和极耳胶层50用于受热熔融以密封极耳92、以及第一密封部13和第二密封部21之 间的间隙。通过第一熔融层31、第二熔融层32和极耳胶层50同步熔融，提高极耳92与聚合物层30之间的密封性能，进而进一步提高封装壳100的密封性能。
在一些实施例中，极耳胶层50具备绝缘性，以使极耳92与壳体10和盖体20保持绝缘，进一步降低极耳92与壳体10和盖体20电连接的风险，使封装壳100不带电。
请参阅图6，在一些实施例中，第一密封部13包括第一表面131和第二表面132。第一表面131朝向第二密封部21，第二表面132连接于第一表面131远离容纳部11的一侧。第一表面131和第二表面132下沉形成第一台阶面133。第一台阶面133与聚合物层30密封连接，当电芯90在封装壳100内产生的气体的压力超过阈值时，聚合物层30通过第一台阶面133位于第二表面132上的开口冲开，用于释放封装壳100内的气体，提高电池使用时的安全性。
在一些实施例中，第一熔融层31设置于第一台阶面133。第一熔融层31铺设于第一台阶面133并与第一表面131平齐，以降低第一熔融层31的厚度对第一连接区14和第二连接区22之间焊接平整度的的影响，极耳提高盖体20与壳体10之间连接和密封的稳定性。
请继续参阅图6，在一些实施例中，第二密封部21包括第三表面211和第四表面212。第三表面211朝向第一表面131，第四表面212连接于第三表面211对应第二表面132的一侧。第三表面211和第四表面212下沉形成第二台阶面213。第二台阶面213与聚合物层30密封连接，当电芯90在封装壳100内产生的气体的压力超过阈值时，聚合物层30通过第二台阶面213位于第四表面212上的开口冲开，用于释放封装壳100内的气体，提高电池使用时的安全性。
在一些实施例中，第二熔融层32设置于第二台阶面213。第二熔融层32铺设于第二台阶面213并与第三表面211平齐，以降低第二熔融层32的厚度对第一连接区14和第二连接区22之间焊接平整度的的影响，极耳提高盖体20与壳体10之间连接和密封的稳定性。
请参阅图7，在一些实施例中，第一密封部13自第一边缘121沿第一方向A延伸设置，极耳92自第二边缘122延伸至壳体10外。即极耳92从焊接连接层中穿出至壳体10外。焊接连接层用于提高极耳92与封装壳100之间的密封性能，聚合物层30用于密封第一密封部13和第二密封部21之间的间隙，且当电芯90在封装壳100内产生的气体的压力超过阈值时，聚合物层30还用于释放封装壳100内的气体。
在一些实施例中，极耳92沿第一方向A的反方向从焊接连接层穿出。
请参阅图8，在一些实施例中，第一密封部13和第二密封部21均为分体结构。第一密封部13包括沿第一方向A间隔设置的第一分体部13a和第二分体部13b。第二密封部21包括第三分体部21a和第四分体部21b，第三分体部21a和第四分体部21b分别与第一分体部13a和第二分体部13b相对 设置。
第一分体部13a和第三分体部21a之间设有聚合物层30并供一个极耳92从聚合物层30穿过。第二分体部13b和第四分体部21b之间设有聚合物层30并供另一个极耳92穿过，以减少第一密封部13和第二密封部21的占用空间，提高电池能量密度。
在一些实施例中，第一分体部13a和第二分体部13b之间裸露的第一边缘121与盖体20对应的区域通过焊接和/或点胶的方式密封连接。
请一并参阅图9和图10，在一些实施例中，第一密封部13朝向第二密封部21的表面设有第一区域13c和第二区域13d。第二密封部21朝向第一密封部13的表面设有第三区域21c和第四区域21d，第三区域21c和第四区域21d分别与第一区域13c和第二区域13d相对设置。第一密封部13和第三区域21c之间设有聚合物层30并供极耳92穿过。第二区域13d和第四区域21d之间通过焊接和/或点胶的方式密封连接。
请参阅图11，在一些实施例中，第一密封部13包括第一部分13e和第二部分13f，第一部分13e沿第一方向A延伸，第二部分13f沿第二方向B延伸，其中第二方向B为电芯90的厚度方向，第二方向B垂直于第一方向A。第二密封部21包括第三部分21e和第四部分21f，第三部分21e和第四部分21f分别与第一部分13e和第二部分13f相对设置。聚合物层30设置于第一密封部13与第二密封部21之间。
极耳92包括第五部分92a和第六部分92b，第五部分92a沿第一方向A延伸，第六部分92b沿第二方向B延伸。第五部分92a穿过第一部分13e和第三部分21e之间的聚合物层30，第六部分92b穿过第二部分13f和第四部分21f之间的聚合物层30。
在一些实施例中，第六部分92b、第二部分13f和第四部分21f沿第二方向B的延伸长度小于或等于盖体20盖合于壳体10时沿第二方向B的厚度。
通过第一密封部13、第二密封部21和极耳92弯折设置，减少第一密封部13、第二密封部21和极耳92在第一方向A上占用的空间，进而提高电池的能量密度。
本申请实施例还提供了一种电池(未示出)，包括电芯90和封装壳100。封装壳100用于封装电芯90，封装壳100可以为上述实施例中的任意一种封装壳。
在一些实施方式中，电池还包括电路保护板(未示出)，电路保护板用于监测电芯90中的电压、电流、绝缘状态及荷电状态等，对电池充电及放电过程进行安全管理，对可能出现的故障进行报警和应急保护处理，对电池的运行进行安全和优化控制。
本申请实施例还提供了一种用电设备(未示出)，包括上述实施例中的任意一种电池。
上述电池和用电设备中，通过第一密封部13和第二密封部21相对设置，以及聚合物层30设置于第一密封部13与第二密封部21之间，提高封装壳 100的密封性能。且当电芯90在封装壳100内产生的气体的压力超过阈值时，聚合物层30还用于释放封装壳100内的气体，能够及时对封装壳100泄压，提高使用时的安全性。与现有的通过在封装壳上设置泄压阀的方式相比，本申请实施例的封装壳100在提高安全性的同时，能够降低生产成本。
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. 一种封装壳，用于封装电芯，所述电芯包括电极组件和与所述电极组件电连接的极耳，其特征在于：所述封装壳包括：
    壳体，设有容纳部，所述容纳部用于容纳所述电极组件，所述极耳从所述容纳部延伸至所述壳体外，所述壳体还设有自所述容纳部开口的边缘沿第一方向向所述壳体外延伸的第一密封部；
    盖体，设有沿所述第一方向延伸的第二密封部，所述盖体盖设于所述容纳部开口，所述第一密封部和所述第二密封部相对设置；以及
    聚合物层，设置于所述第一密封部与所述第二密封部之间，
    所述聚合物层用于密封所述第一密封部和所述第二密封部之间的间隙，且当所述电芯在所述封装壳内产生的气体的压力超过阈值时，所述聚合物层还用于释放所述封装壳内的气体。
  2. 如权利要求1所述的封装壳，其特征在于：所述极耳从所述聚合物层穿出至所述壳体外。
  3. 如权利要求1所述的封装壳，其特征在于：所述容纳部开口的边缘包括首尾相连的第一边缘和第二边缘，所述第一密封部自所述第一边缘沿所述第一方向延伸设置，所述壳体还设有第一连接区，所述第一连接区设置于所述第二边缘上，所述盖体朝向所述容纳部的表面设有与第一连接区重叠的第二连接区，所述第一连接区和所述第二连接区通过焊接形成焊接连接层。
  4. 如权利要求3所述的封装壳，其特征在于：所述容纳部开口的第二边缘向外翻折形成翻折部，所述第一连接区设置于所述翻折部朝向所述盖体的表面。
  5. 如权利要求3所述的封装壳，其特征在于：所述壳体还设有第一点胶区，所述第一点胶区设置于所述第一边缘和第二边缘的交接区域，所述盖体朝向所述容纳部的表面设有与第一点胶区重叠的第二点胶区，所述第一点胶区和所述第二点胶区通过点胶形成点胶连接层。
  6. 如权利要求1所述的封装壳，其特征在于：所述封装壳还包括极耳胶层，所述极耳胶层设置于所述聚合物层之间，所述极耳从所述极耳胶层穿出至所述壳体外。
  7. 如权利要求1所述的封装壳，其特征在于：所述第一密封部包括第一表面和第二表面，所述第一表面朝向所述第二密封部，所述第二表面连接于所述第一表面远离所述容纳部的一侧，所述第一表面和所述第二表面下沉形成第一台阶面，所述第一台阶面与所述聚合物层密封连接。
  8. 如权利要求7所述的封装壳，其特征在于：所述第二密封部包括第三表面和第四表面，所述第三表面朝向所述第一表面，所述第四表面连接于所述第三表面对应所述第二表面的一侧，所述第三表面和所述第四表面下沉形成第二台阶面，所述第二台阶面与所述聚合物层密封连接。
  9. 一种电池，包括电芯，其特征在于：所述电池还包括如权利要求1至 8中任一项所述的封装壳。
  10. 一种用电设备，其特征在于：包括权利要求9所述的电池。
PCT/CN2022/112999 2021-08-17 2022-08-17 封装壳、电池及用电设备 WO2023020533A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2022569630A JP2023541747A (ja) 2021-08-17 2022-08-17 パッケージケース、電池及び電気機器
EP22857844.9A EP4207447A1 (en) 2021-08-17 2022-08-17 Encapsulation casing, battery, and electrical device
CN202280013783.XA CN117223156A (zh) 2021-08-17 2022-08-17 封装壳、电池及用电设备
US18/128,593 US20230238668A1 (en) 2021-08-17 2023-03-30 Packaging housing, battery, and electric device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202121929405.5U CN215896547U (zh) 2021-08-17 2021-08-17 封装壳、电池及用电设备
CN202121929405.5 2021-08-17

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/128,593 Continuation US20230238668A1 (en) 2021-08-17 2023-03-30 Packaging housing, battery, and electric device

Publications (1)

Publication Number Publication Date
WO2023020533A1 true WO2023020533A1 (zh) 2023-02-23

Family

ID=80563605

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/112999 WO2023020533A1 (zh) 2021-08-17 2022-08-17 封装壳、电池及用电设备

Country Status (5)

Country Link
US (1) US20230238668A1 (zh)
EP (1) EP4207447A1 (zh)
JP (1) JP2023541747A (zh)
CN (2) CN215896547U (zh)
WO (1) WO2023020533A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN215896547U (zh) * 2021-08-17 2022-02-22 宁德新能源科技有限公司 封装壳、电池及用电设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110151292A1 (en) * 2009-12-23 2011-06-23 Samsung Sdi Co., Ltd. Secondary battery and manufacturing method thereof
CN103187177A (zh) * 2004-08-11 2013-07-03 日本电气株式会社 膜封装电气装置
WO2021033939A1 (ko) * 2019-08-19 2021-02-25 삼성에스디아이 주식회사 이차 전지
CN215896547U (zh) * 2021-08-17 2022-02-22 宁德新能源科技有限公司 封装壳、电池及用电设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103187177A (zh) * 2004-08-11 2013-07-03 日本电气株式会社 膜封装电气装置
US20110151292A1 (en) * 2009-12-23 2011-06-23 Samsung Sdi Co., Ltd. Secondary battery and manufacturing method thereof
WO2021033939A1 (ko) * 2019-08-19 2021-02-25 삼성에스디아이 주식회사 이차 전지
CN215896547U (zh) * 2021-08-17 2022-02-22 宁德新能源科技有限公司 封装壳、电池及用电设备

Also Published As

Publication number Publication date
US20230238668A1 (en) 2023-07-27
CN215896547U (zh) 2022-02-22
CN117223156A (zh) 2023-12-12
EP4207447A1 (en) 2023-07-05
JP2023541747A (ja) 2023-10-04

Similar Documents

Publication Publication Date Title
KR101155889B1 (ko) 이차 전지
KR100496305B1 (ko) 파우치형 리튬 이차 전지와 이의 제조 방법
US20100053835A1 (en) Protection circuit board, secondary battery and battery pack
WO2016178540A1 (ko) 전류 제한 기능의 전극리드를 포함하는 파우치형 이차전지
KR100938896B1 (ko) 배터리 팩
WO2023005408A1 (zh) 电池单体、电池以及用电装置
JP2008177084A (ja) ヒューズ付き蓄電デバイス用リード端子及び非水電解質蓄電デバイス
KR101734703B1 (ko) 배터리 셀
JP2006313743A (ja) 二次電池
JP2006313741A (ja) 二次電池
TW201304950A (zh) 邊緣絕緣之電池袋用片狀物
KR100515833B1 (ko) 젤리-롤형의 전극조립체와 이를 채용한 이차전지
KR20130135063A (ko) 이차 전지 팩
WO2014038891A1 (ko) 이차전지
CN212676424U (zh) 电池和使用电池的装置
US20120231307A1 (en) Secondary battery
WO2023020533A1 (zh) 封装壳、电池及用电设备
WO2021217649A1 (zh) 端盖组件、二次电池、电池组以及用电装置
KR20140094205A (ko) 이차 전지
JP2015153694A (ja) 電気化学セル
KR20180091324A (ko) 배터리 셀 및 이를 포함하는 배터리 모듈
US20120003506A1 (en) Electrode assembly, method of fabricating electrode assembly, and secondary battery including electrode assembly
WO2023039706A1 (zh) 电芯、电池及用电设备
KR100686839B1 (ko) 이차전지
US20200373549A1 (en) Pouch type lithium secondary battery preventing internal short circuit

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2022569630

Country of ref document: JP

Kind code of ref document: A

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

Ref document number: 22857844

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2022857844

Country of ref document: EP

Effective date: 20230330

WWE Wipo information: entry into national phase

Ref document number: 202280013783.X

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE