WO2023097463A1 - 电池及用电设备 - Google Patents

电池及用电设备 Download PDF

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Publication number
WO2023097463A1
WO2023097463A1 PCT/CN2021/134468 CN2021134468W WO2023097463A1 WO 2023097463 A1 WO2023097463 A1 WO 2023097463A1 CN 2021134468 W CN2021134468 W CN 2021134468W WO 2023097463 A1 WO2023097463 A1 WO 2023097463A1
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WIPO (PCT)
Prior art keywords
region
battery
along
distance
folded
Prior art date
Application number
PCT/CN2021/134468
Other languages
English (en)
French (fr)
Inventor
李晓峰
郭培培
林森
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 CN202180028922.1A priority Critical patent/CN115552700A/zh
Priority to PCT/CN2021/134468 priority patent/WO2023097463A1/zh
Publication of WO2023097463A1 publication Critical patent/WO2023097463A1/zh

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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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • 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
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • 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
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • 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 technology, and in particular to a battery and electrical equipment.
  • the packaged curved battery has two curved surfaces in the thickness direction and an edge seal between the two curved surfaces.
  • the edge is folded toward one of the curved sides, the compression of the fold creates wrinkles that affect the appearance and size of the battery.
  • An embodiment of the present application provides a battery, including an electrode assembly, a first conductive part plate connected to the electrode assembly, and a case covering at least a part of the first conductive part plate.
  • the casing includes a first casing part and a second casing part, the first casing part includes a first surface curved along a first direction, and the second casing part includes a first surface which is spaced apart from the first surface in a second direction Two sides.
  • the second direction is perpendicular to the first direction.
  • the second surface is bent along the first direction and clamps the electrode assembly together with the first surface.
  • the housing also includes a first portion, the projection of the first portion at least partially overlaps with the projection of the electrode assembly along the third direction.
  • the third direction is perpendicular to both the first direction and the second direction.
  • the first housing part is connected to the second housing part.
  • the first portion includes a first folded portion, a second folded portion and a first end.
  • the first turning part is connected to the junction of the first shell part and the second shell part, the first end part is away from the first shell part, and the second turning part is located between the first turning part and the first end part .
  • the battery further includes a first side portion connected to the first surface and the first portion, and a second side portion connected to the second surface and the first portion, and the first portion also includes a A first region between the two folded portions and facing the first side portion in the third direction, and a second region located between the second folded portion and the first end portion and facing the second side portion in the third direction.
  • Folding the first part and the second turning part along the second direction forms the hem area, and the shape of the hem area is controllable by controlling the overlapping relationship between the first area and the second area in the third direction.
  • the first folded portion is bent from the first connecting portion toward the first surface along the second direction, so as to reduce the risk of the first folded portion being bent in different directions to overlap and generate wrinkles, thereby reducing the impact of wrinkles on the first surface. battery impact.
  • the first folded portion can also reduce the risk that the side edge of the first folded portion away from the joint of the first shell part and the second shell will be pulled by the joint due to bending, thereby reducing the impact on the first part when the first part is folded back.
  • the tension generated at the junction of the casing part and the second casing part reduces the risk of leakage of the electrolyte caused by the rupture of the junction, and further improves the safety of the battery.
  • the first portion along the second direction, includes a first side extending along the first direction that is folded back toward the side of the first surface, and is formed by folding back toward the side of the second surface in the first region.
  • a second side extending along the first direction, and a third side opposite the second side in the second region and extending along the first direction.
  • the first edge extends along the packaging line of the junction of the first casing part and the second casing part, so as to improve the packaging reliability of the junction of the first casing part and the second casing part.
  • the first side is arranged tangent to the second side.
  • the second folded portion is bent back toward the second surface along two directions at the point of tangency, so as to reduce the risk of wrinkles at the point of tangency.
  • the part of the first part on the side of the first side facing the first surface forms a double hem structure
  • the part of the first part on the side of the first side facing the second surface forms a single hem structure.
  • the first side is curved in the first direction.
  • the first edge bends and extends along the packaging line at the junction of the first housing part and the second housing part to fit with the packaging line at the junction of the first housing part and the second housing part, thereby improving the first Encapsulation reliability at the junction of the housing part and the second housing part.
  • the first portion viewed along the third direction, has a third region located between the first surface and the second surface in the first direction, and a third region located between the first surface and the second surface in the first direction.
  • the fourth area outside the surface.
  • the first portion has a third area overlapping the first face in the third direction, and a fourth area separated from the first face in the third direction.
  • the third area is used to connect with the first side portion and the second side portion, so as to improve packaging reliability at the junction of the first side portion and the second side portion.
  • the fourth area is used to connect with the edge sealing portions at both ends of the battery along the first direction, so as to improve the overall packaging reliability of the casing.
  • the first area and the second area at least partially overlap, so that the first part forms a hem area, and the hem area is formed by controlling the overlapping relationship between the first area and the second area.
  • the shape of the battery can be controlled to reduce the risk of wrinkles in the first part, thereby reducing the impact of wrinkles on the battery.
  • the first part is provided with a first layer, and the first region and the second region are connected through the first layer.
  • the first region and the second region are connected through the first layer to improve the stability of the first part of the structure, reduce the space occupied by the battery in the third direction, and increase the energy density of the battery.
  • the first surface is curved in such a way that it protrudes from the side opposite to the second surface, so as to increase the space for the housing to accommodate the electrode assembly and increase the energy density of the battery.
  • the second surface is curved in such a way that it protrudes from one side of the first surface, so that the battery has the same bending tendency in the first direction, so that the battery can be adapted to electronic devices
  • the preset curved battery compartment meets the individual needs of electronic equipment.
  • the first distance between the two ends of the first region includes a part longer than the second distance between the two ends of the second region, and this part is
  • the third portion of the first folded portion not covered by the second folded portion is used to connect with the edge sealing portions at both ends of the battery along the first direction, so as to improve the overall packaging reliability of the casing.
  • the first distance between the two ends of the first region includes a part shorter than the second distance between the two ends of the second region, and this part is The fourth part where the first folded portion and the second folded portion overlap, the fourth portion forms a hem area, and the shape of the hem area can be controlled by controlling the overlapping relationship between the first area and the second area, so as to lower the first portion The risk of wrinkling, thereby reducing the impact of wrinkling on the battery.
  • the first distance between the two ends of the first region is shorter than the second distance between the two ends of the second region.
  • this part is the fourth part where the first folded part overlaps with the second folded part, the fourth part forms the hem area, and the shape of the hem area is made by controlling the overlapping relationship between the first area and the second area in the third direction Controllable to reduce the risk of wrinkles in the first part, thereby reducing the impact of wrinkles on the battery.
  • the first distance between the two ends of the first region is longer than the second distance between the two ends of the second region.
  • This part is the third part where the first folded part is not covered by the second folded part, and the third part is used to connect with the edge sealing parts at both ends of the battery along the first direction, so as to improve the packaging reliability of the whole casing.
  • An embodiment of the present application also provides an electric device, including the above-mentioned battery.
  • the first part is folded back in the second direction by the first folded part and the second folded part to form a hemming area, and by controlling the first area and the second area in the third direction
  • the overlapping relationship makes the shape of the hem area controllable.
  • the first folded portion is bent from the first connecting portion toward the first surface along the second direction, so as to reduce the risk of the first folded portion being bent in different directions to overlap and generate wrinkles, thereby reducing the impact of wrinkles on the first surface. battery impact.
  • the first folded portion can also reduce the risk that the side edge of the first folded portion away from the joint of the first shell part and the second shell will be pulled by the joint due to bending, thereby reducing the impact on the first part when the first part is folded back.
  • the tension generated at the junction of the casing part and the second casing part reduces the risk of leakage of the electrolyte caused by the rupture of the junction, and further improves the safety of the battery.
  • FIG. 1 is a schematic diagram of a first structure of a battery in an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an exploded structure of a battery in an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a casing structure of a battery in an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a first side structure of a battery in an embodiment of the present application.
  • FIG. 5 is a schematic diagram showing the third part of the battery along the second direction in an embodiment of the present application.
  • FIG. 6 is an enlarged schematic diagram of a first part in part III of FIG. 4 .
  • FIG. 7 is a second partially enlarged schematic view of part IV of FIG. 4 .
  • FIG. 8 is a third partial enlarged schematic view of the V portion in FIG. 4 .
  • FIG. 9 is a schematic diagram of a second side structure of a battery in an embodiment of the present application.
  • FIG. 10 is a first partially enlarged schematic diagram of FIG. 9 .
  • FIG. 11 is a schematic diagram of the first cross-sectional structure of A-A of the battery in an embodiment of the present application.
  • FIG. 12 is a schematic diagram of the B-B second cross-sectional structure of the battery in an embodiment of the present application.
  • FIG. 13 is a schematic diagram of the third cross-sectional structure of the battery C-C in an embodiment of the present application.
  • FIG. 14 is a schematic diagram of a D-D fourth cross-sectional structure of a battery in an embodiment of the present application.
  • FIG. 15 is a schematic diagram of a fifth cross-sectional structure of the E-E battery in an embodiment of the present application.
  • FIG. 16 is a schematic diagram of a second structure of a battery in an embodiment of the present application.
  • FIG. 17 is a schematic diagram of the F-F sixth cross-sectional structure of the battery in an embodiment of the present application.
  • FIG. 18 is a schematic diagram of a third structure of a battery in an embodiment of the present application.
  • FIG. 19 is a schematic diagram of the H-H seventh cross-sectional structure of the battery in an embodiment of the present application.
  • FIG. 20 is a schematic structural diagram of electrical equipment in an embodiment of the present application.
  • the first side 211 is a first side 211 .
  • An embodiment of the present application provides a battery, including an electrode assembly, a first conductive part plate connected to the electrode assembly, and a case covering at least a part of the first conductive part plate.
  • the casing includes a first casing part and a second casing part, the first casing part includes a first surface curved along a first direction, and the second casing part includes a first surface which is spaced apart from the first surface in a second direction Two sides.
  • the second direction is perpendicular to the first direction.
  • the second surface is bent along the first direction and clamps the electrode assembly together with the first surface.
  • the housing also includes a first portion, the projection of the first portion at least partially overlaps with the projection of the electrode assembly along the third direction.
  • the third direction is perpendicular to both the first direction and the second direction.
  • the first housing part is connected to the second housing part.
  • the first portion includes a first folded portion, a second folded portion and a first end.
  • the first turning part is connected to the junction of the first shell part and the second shell part, the first end part is away from the first shell part, and the second turning part is located between the first turning part and the first end part .
  • the battery further includes a first side portion connected to the first surface and the first portion, and a second side portion connected to the second surface and the first portion, and the first portion also includes a A first region between the two folded portions and facing the first side portion in the third direction, and a second region located between the second folded portion and the first end portion and facing the second side portion in the third direction.
  • An embodiment of the present application provides an electric device, including the above-mentioned battery.
  • the first part is folded back in the second direction by the first folded part and the second folded part to form a hemming area, and by controlling the first area and the second area in the third direction
  • the overlapping relationship makes the shape of the hem area controllable.
  • the first folded portion is bent from the first connecting portion toward the first surface along the second direction, so as to reduce the risk of the first folded portion being bent in different directions to overlap and generate wrinkles, thereby reducing the impact of wrinkles on the first surface. battery impact.
  • the first folded portion can also reduce the risk that the side edge of the first folded portion away from the joint of the first shell part and the second shell will be pulled by the joint due to bending, thereby reducing the impact on the first part when the first part is folded back.
  • the tension generated at the junction of the casing part and the second casing part reduces the risk of leakage of the electrolyte caused by the rupture of the junction, and further improves the safety of the battery.
  • the present application provides a battery 100, including an electrode assembly 10, a first conductive plate 11 connected to the electrode assembly 10, and a casing covering at least a part of the first conductive plate 11. 20.
  • the housing 20 includes a first housing part 21 and a second housing part 22 .
  • the first housing part 21 and the second housing part 22 are disposed opposite to each other along the second direction Z.
  • the first direction X is perpendicular to the second direction Z
  • the first housing part 21 includes a first surface 211 curved along the first direction X.
  • the second housing part 22 includes a second surface 221 spaced apart from the first surface 211 in the second direction Z. Wherein, the second surface 221 is bent along the first direction X and clamps the electrode assembly 10 together with the first surface 211 .
  • the electrode assembly 10 is an arc structure bent along the first direction X.
  • the electrode assembly 10 is a wound structure or a stacked structure.
  • the first conductive part plate 11 protrudes from the casing 20 along the first direction X. It can be understood that, in some embodiments, the battery 100 further includes a second conductive part plate 12 protruding from the casing 20 along the first direction X, and the second conductive part plate 12 is connected to the first conductive part plate 12 .
  • the conductive part plates 11 are arranged at intervals and have different polarities.
  • the first conductive part plate 11 is a positive pole tab
  • the second conductive part plate 12 is a negative pole tab.
  • the battery 100 further includes a first side portion 31 connected to the first surface 211 and the first portion 23 , and a second side portion connected to the second surface 221 and the first portion 23 41.
  • the first folded portion 231 is connected to the first side portion 31, and the second folded portion 232 is at least partially connected to the second side portion 41, so as to further reduce the space occupied by the battery 100 in the third direction Y and improve the battery life. 100 energy density.
  • the battery 100 further includes a third side 32 , a fifth side 33 and a seventh side 34 .
  • the first side portion 31 , the third side portion 32 , the fifth side portion 33 and the seventh side portion 34 extend from the first surface 211 along the second direction Z. As shown in FIG. And the first side part 31 , the third side part 32 , the fifth side part 33 and the seventh side part 34 form a cavity for accommodating the electrode assembly 10 .
  • the battery 100 further includes a fourth side 42 , a sixth side 43 and an eighth side 44 .
  • the second side portion 41 , the fourth side portion 42 , the sixth side portion 43 and the eighth side portion 44 extend from the second surface 221 along the second direction Z toward the first surface 211 .
  • the second side part 41 , the fourth side part 42 , the sixth side part 43 and the eighth side part 44 form a cavity for accommodating the electrode assembly 10 .
  • the side of the second side portion 41 away from the second surface 221 is connected to the side of the first side portion 31 away from the first surface 211 to form an encapsulation line at the junction of the first housing part 21 and the second housing part 22 , the first part 23 is used to seal the packaging line, so as to improve the packaging reliability of the junction of the first casing part 21 and the second casing part 22 .
  • the housing 20 also includes a first portion 23 .
  • the projection of the first portion 23 at least partially overlaps with the projection of the electrode assembly 10 .
  • the third direction Y is perpendicular to both the first direction X and the second direction Z.
  • the first casing part 21 is connected to the second casing part 22 for clamping the electrode assembly 10 in the second direction Z.
  • the first portion 23 includes a first folded portion 231 , a second folded portion 232 and a first end portion 233 .
  • the first folded portion 231 is connected to the junction of the first housing member 21 and the second housing member 22, the first end portion 233 is separated from the first housing member 21, and the second folded portion 232 is located at the first folded portion. 231 and the first end 233. At least part of the second folded portion 232 is in contact with the first housing part 21 and/or the second housing part 22 .
  • the projection of the first turning portion 231 at least partially overlaps the projection of the electrode assembly 10
  • the projection of the second turning portion 232 at least partially overlaps the projection of the electrode assembly 10 .
  • the first turning portion 231 includes a first edge 231a
  • the second turning portion 232 includes a second edge 232a connected to the first edge 231a
  • the first edge 231a and the second edge 232a are far away from the first housing part 21 .
  • the first part 23 is used to improve the packaging reliability of the junction of the first casing part 21 and the second casing part 22 , thereby improving the safety of the battery 100 .
  • the first turning portion 231 is connected to the junction of the first housing part 21 and the second housing part 22 to seal the junction of the first housing part 21 and the second housing part 22 place.
  • the first part 231 is used to reduce the pulling force on the joint between the first shell part 21 and the second shell part 22 when the first part 23 is folded back, so as to reduce the risk of electrolyte leakage due to rupture of the joint.
  • the first portion 23 also includes a first region 23 a between the first folded portion 231 and the second folded portion 232 , and a second region 23 a located between the second folded portion 232 and the first end portion 233 . Area 23b.
  • the first portion 23 also includes a first connection portion 23e and a second connection portion 23f.
  • One side of the first connecting portion 23 e is connected to the first folded portion 231 , and the other side is connected to the junction of the first housing part 21 and the second housing part 22 .
  • One side of the second connecting portion 23 f is connected to a portion of the first turning portion 231 away from the first connecting portion 23 e , and the other side is connected to the second turning portion 232 .
  • the first connecting portion 23e and the second connecting portion 23f are bent in opposite directions, so that the first region 23a and the second region 23b are folded back in the second direction Z along the second direction.
  • the first region 23a is bent toward the first side portion 31 in the third direction Y so that the first folded portion 231 is bent from the first connecting portion 23e toward the first surface 211 along the second direction Z.
  • the second region 23b is turned toward the second side portion 41 in the third direction Y so that the second folded portion 232 is bent toward the second surface 221 along the second direction Z.
  • the first folded portion 231 and the second folded portion 232 are folded back in the second direction Z so that the first portion 23 forms a hem area, and by controlling the overlapping relationship between the first region 23a and the second region 23b in the third direction Y, the folded The shape of the border area is controllable.
  • the first folded portion 231 is bent from the first connecting portion 23e to the first surface 211 along the second direction Z, so as to reduce the risk of the first folded portion 231 being bent in different directions to overlap and generate wrinkles, and further The influence of wrinkles on the battery 100 is reduced.
  • first folded portion 231 can also reduce the risk that the side edge of the first folded portion 231 away from the junction of the first shell member 21 and the second shell member 22 will pull the joint due to bending, thereby reducing the risk of the first portion 23
  • the pulling force generated on the junction of the first casing part 21 and the second casing part 22 during the folding back reduces the risk of electrolyte leakage due to rupture of the junction and further improves the safety of the battery.
  • the first portion 23 includes a first side 234 extending along the first direction X that is folded toward the side of the first surface 211 .
  • the first side 234 extends along the packaging line of the junction of the first housing part 21 and the second housing part 22, so as to improve the packaging reliability of the junction of the first housing part 21 and the second housing part 22 .
  • the first part 23 also includes a second edge 235 extending along the first direction X that is formed by turning back toward the second surface 221 in the connecting portion of the first region 23a and the second region 23b, and located in the second region 23b.
  • the second side 235 is along the opposite side of the second direction Z and the third side 236 extends along the first direction X.
  • the overlapping relationship between the first area 23a and the second area 23b in the third direction Y is controlled, thereby making the shape of the hemming area controllable.
  • the second side 235 is located between the first side 234 and the first surface 211 , so that the first folded portion 231 is located between the first side 234 and the first surface 211 .
  • the third side 236 is located between the first surface 211 and the second surface 221 , so that the second folded portion 232 is located between the first surface 211 and the second surface 221 .
  • the first side 234 is curved in the first direction X.
  • the packaging line at the junction of the first housing part 21 and the second housing part 22 is bent along the first direction X.
  • the first side 234 bends and extends along the sealing line of the junction of the first housing part 21 and the second housing part 22, so as to be in line with the packaging line of the junction of the first housing part 21 and the second housing part 22.
  • Adaptation improves the packaging reliability of the junction of the first housing part 21 and the second housing part 22 .
  • the first side 234 and the second side 235 are arranged tangent to each other.
  • the two directions Z are bent back toward the second surface 221 to reduce the risk of wrinkles at the tangent point 60 .
  • the part of the first part 23 located on the side of the first side 234 facing the first surface 211 forms a double-folded hemming structure
  • the part of the first part 23 located on the side of the first side 234 facing the second surface 221 forms a single-folded structure. edge structure.
  • the first side 234 is curved in the first direction X, and the first side 234 and the second side 235 are tangent to the midpoint of the first side 234 in the first direction X.
  • the midpoint position allows for a tolerance range of 0 to ⁇ 5%.
  • the first region 23a and the second region 23b at least partially overlap, so that the first part 23 forms a hemming region, and by controlling the first region 23a
  • the overlapping relationship with the second area 23b makes the shape of the hem area controllable.
  • the first folded portion 231 is bent from the first connecting portion 23e to the first surface 211 along the second direction Z, so as to reduce the risk of the first folded portion 231 being bent in different directions to overlap and generate wrinkles, and further The influence of wrinkles on the battery 100 is reduced.
  • the first region 23a can also reduce the risk that the side edge of the first folded portion 231 away from the junction of the first housing part 21 and the second housing part 22 will be pulled by the junction due to bending, thereby reducing the first part 23 to be folded back.
  • the pulling force generated at the junction of the first case part 21 and the second case part 22 reduces the risk of leakage of the electrolyte due to the rupture of the junction and further improves the safety of the battery.
  • the first distance L1 between the two ends of the first region 23a is the distance between the first side 234 and the second side 235 in the second direction Z.
  • Distance; the second distance L2 between the two ends of the second region 23 b is the distance between the second side 235 and the third side 236 in the second direction Z.
  • the first distance L1 between the two ends of the first region 23a includes a part longer than the second distance L2 between the two ends of the second region 23b, and this part is the first inflection
  • the portion 231 is away from the third portion 51 of the second folded portion 232 .
  • the third portion 51 is located at both ends of the first region 23 a along the first direction X, so as to facilitate connection with the edge seals at both ends of the battery 100 along the first direction X, and improve the packaging reliability of the casing 20 as a whole.
  • the first distance L1 between the two ends of the first region 23a includes a portion shorter than the second distance L2 between the two ends of the second region 23b, defining the first distance in this portion L1 is the third distance L3, which is the fourth portion 52 where the first folded portion 231 and the second folded portion 232 overlap.
  • the fourth portion 52 forms a hemming area. The overlapping relationship makes the shape of the hemming region controllable, so as to reduce the risk of creases in the first part 23 , thereby reducing the impact of the creases on the battery 100 .
  • the first distance L1 between the two ends of the first region 23a includes a distance L1 between the two ends of the second region 23b
  • This part is the fourth part 52 where the first folded part 231 and the second folded part 232 overlap, the fourth part 52 forms a hemming area, by controlling the first area 23a and the second area
  • the overlapping relationship between 23 b makes the shape of the hemming region controllable, so as to reduce the risk of wrinkles in the first part 23 , thereby reducing the impact of the wrinkles on the battery 100 .
  • the relationship between the first distance L1 between the two ends of the first region 23a and the second distance L2 between the two ends of the second region 23b is: Along the first direction X, the first distance L1 is first greater than the second distance L2; then the distance difference between the first distance L1 and the second distance L2 gradually decreases until equal; then the second distance L2 is greater than the first distance L1, and The distance difference between the first distance L1 and the second distance L2 increases gradually until the first distance L1 is at a minimum value (for example, when the first side 234 is tangent to the second side 235, the first distance L1 is equal to zero); then the first distance The distance difference between L1 and the second distance L2 gradually decreases until equal; finally the first distance L1 is greater than the second distance L2, and the distance difference between the first distance L1 and the second distance L2 gradually increases.
  • the first portion 23 has a third region 23c located between the first surface 211 and the second surface 221 in the first direction X, and The fourth region 23d located outside the first surface 211 and the second surface 221 in a direction X.
  • the third region 23 c is used to be in contact with the first side portion 31 and the second side portion 41 , so as to improve packaging reliability at the junction of the first side portion 31 and the second side portion 41 .
  • the fourth region 23d is used to connect with the edge seals at both ends of the battery 100 along the first direction X, so as to improve the packaging reliability of the casing 20 as a whole.
  • the first distance L1 between the two ends of the first region 23a is greater than the second distance between the two ends of the second region 23b.
  • the shorter part of L2 is the fourth part 52 where the first folded part 231 and the second folded part 232 overlap.
  • the overlapping relationship makes the shape of the hemming region controllable, so as to reduce the risk of creases in the first part 23 , thereby reducing the impact of the creases on the battery 100 .
  • the first distance L1 between the two ends of the first region 23a is greater than the second distance between the two ends of the second region 23b.
  • the longer portion of L2 is the third portion 51 where the first folded portion 231 is not covered by the second folded portion 232 .
  • the third part 51 is convenient to be connected with the sealing edge of one end of the battery 100 along the first direction X, so as to improve the packaging reliability of the casing 20 as a whole.
  • the first portion 23 is provided with a first layer 237 .
  • the first portion 23 is provided with a first layer 237 and a second layer 237 disposed opposite to each other along the second direction Z. layer 238 , the first layer 237 faces the second face 221 , and the second layer 238 faces the first face 211 .
  • the first layer 237 when the first folded portion 231 and the second folded portion 232 of the first portion 23 are folded back, along the third direction Y, the first layer 237 includes a first portion 237 a and a second portion 237 b.
  • the first portion 237a is located between the first folded portion 231 and the second folded portion 232, and the first folded portion 231 and the second folded portion 232 are connected and fixed by the first portion 237a, so as to improve the height of the first folded portion 231 and the second folded portion.
  • the second portion 237b is located between the second folded portion 232 and the second side portion 41, and the second folded portion 232 and the second side portion 41 are connected and fixed through the second portion 237b to improve the height of the second folded portion 232 and the second folded portion.
  • the second layer 238 is located between the first folded portion 231 and the first side portion 31, and the first folded portion 231 and the first side portion 31 are connected and fixed by the second layer 238 to improve the first folded portion 231 and the first side. The stability of the structure between the parts 31.
  • the first layer 237 is made of materials such as polyurethane or polyolefin; the second layer 238 is made of materials such as polyurethane or polyolefin.
  • the battery 100 further includes a second part 24, the side of the sixth side 43 away from the second surface 221 is connected to the side of the fifth side 33 away from the first surface 211 to form a first case
  • the packaging line at the junction of the body part 21 and the second housing part 22, the second part 24 is used to seal the packaging line, so as to improve the packaging at the junction of the first housing part 21 and the second housing part 22 reliability.
  • the structure of the second part 24 is the same as that of the first part 23, and the second part 24 is arranged symmetrically with the first part 23, and details are not repeated here.
  • the second surface 221 is curved in a manner protruding from one side of the first surface 211, so that the battery 100 has The same bending tendency facilitates the battery 100 to be adapted to the preset curved battery compartment in the electronic device to meet the individual requirements of the electronic device.
  • the first surface 211 is curved in a manner protruding from the side opposite to the second surface 221, so as to increase the space for the housing 20 to accommodate the electrode assembly 10, The energy density of the battery 100 is increased.
  • the first side 234 is arranged tangent to the second side 235, the first side 234 is tangent to the second side 235 at a point 60, and the second folded portion 232 is at a tangent point 60. Bending back toward the second surface 221 along the second direction Z to reduce the risk of wrinkles at the tangent point 60 .
  • the part of the first part 23 located on the side of the first side 234 facing the first surface 211 forms a double-folded hemming structure
  • the part of the first part 23 located on the side of the first side 234 facing the second surface 221 forms a single-folded structure. edge structure.
  • the first side 234 and the second side 235 are spaced apart in the second direction Z, viewed along the third direction Y, the second side 235 is located between the first side 234 and the second side. Between one side 211, the part of the first part 23 located on the side of the first side 234 facing the first side 211 forms a double hem structure, and the part of the first part 23 located on the side of the first side 234 facing the second side 221 forms a single hem structure.
  • the area of the double-folded structure is increased, thereby reducing the space occupied by the second folded portion 232 in the second direction Z, and improving the energy density of the battery 100 .
  • the embodiment of the present application also provides an electric device 200 , including any battery 100 in the above embodiments, and the battery 100 is used to supply power to the electric device 200 .
  • the first portion 23 is folded back in the second direction Z by the first folded portion 231 and the second folded portion 232 to form a folded area, and by controlling the first region 23a and the second region 23b
  • the overlapping relationship in the third direction Y makes the shape of the hem area controllable.
  • the first folded portion 231 is bent from the first connecting portion 23e to the first surface 211 along the second direction Z, so as to reduce the risk of the first folded portion 231 being bent in different directions to overlap and generate wrinkles, and further The influence of wrinkles on the battery 100 is reduced.
  • first folded portion 231 can also reduce the risk that the side edge of the first folded portion 231 away from the junction of the first shell member 21 and the second shell member 22 will pull the joint due to bending, thereby reducing the risk of the first portion 23
  • the pulling force generated on the junction of the first casing part 21 and the second casing part 22 during the folding back reduces the risk of electrolyte leakage due to rupture of the junction and further improves the safety of the battery.

Landscapes

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

Abstract

本申请公开了一种电池，包括电极组件和连接于电极组件的第一导电部板，以及壳体。壳体包括第一壳体件和第二壳体件，第一壳体件包括沿第一方向弯曲的第一面，第二壳体件包括在第二方向上与第一面间隔设置的第二面。第二面沿第一方向弯曲并与第一面共同夹持电极组件。壳体还包括第一部分，沿第三方向，第一部分的投影与电极组件的投影至少部分重叠。第一壳体件与第二壳体件相接。第一部分包括第一回折部、第二回折部以及第一端部。第一回折部连接于第一壳体件和第二壳体件的相接处，第一端部与第一壳体相离，第二回折部位于第一回折部和第一端部之间。本申请还公开了一种用电设备，包括上述的电池。上述电池能降低褶皱对电池影响。

Description

电池及用电设备 技术领域
本申请涉及电池技术领域，尤其涉及一种电池及用电设备。
背景技术
在弧形电池的生产过程中，封装后的弧形电池在厚度方向上具有两个弧形面和位于两个弧形面之间的封边。当封边朝向其中一弧形面翻折时，折边压缩会产生褶皱，从而影响电池外观与尺寸。
发明内容
有鉴于此，有必要提供一种能降低褶皱对电池影响的电池及用电设备。
本申请的实施例提供一种电池，包括电极组件和连接于电极组件的第一导电部板，以及覆盖第一导电部板至少一部分的壳体。壳体包括第一壳体件和第二壳体件，第一壳体件包括沿第一方向弯曲的第一面，第二壳体件包括在第二方向上与第一面间隔设置的第二面。第二方向垂直于第一方向。第二面沿第一方向弯曲并与第一面共同夹持电极组件。壳体还包括第一部分，沿第三方向，第一部分的投影与电极组件的投影至少部分重叠。第三方向与第一方向和第二方向均垂直。第一壳体件与第二壳体件相接。第一部分包括第一回折部、第二回折部以及第一端部。第一回折部连接于第一壳体件和第二壳体件的相接处，第一端部与第一壳体相离，第二回折部位于第一回折部和第一端部之间。沿第二方向，电池还包括与第一面和第一部分相接的第一侧部，以及与第二面和第一部分相接的第二侧部，第一部分还包括位于第一回折部与第二回折部之间且在第三方向上朝向第一侧部的第一区域，以及位于第二回折部与第一端部之间且在第三方向上朝向第二侧部的第二区域。
通过第一回折部和第二回折部沿第二方向回折使第一部分形成折边区，并且通过控制第一区域和第二区域在第三方向上的重叠关系使该折边区的形状可控。具体地，第一区域使第一回折部自第一连接部沿第二方向向第一面回折弯曲，用以降低第一回折部沿不同的方向弯曲从而重叠产生褶皱的风险，进而降低褶皱对电池的影响。并且第一回折部还能降低第一回折部远离第一壳体件和第二壳体件的相接处的侧边由于弯曲拉扯该相接处的风险，进而降低第一部分回折时对第一壳体件和第二壳体件的相接处产生的拉力，降低该相接处破裂导致电解液泄露的风险，进一步提高电池的安全性。
本申请的一些实施例中，沿第二方向，第一部分包括朝向第一面一侧回折而成的沿第一方向延伸的第一边、在第一区域中朝向第二面一侧回折而成的沿第一方向延伸的第二边，以及在第二区域中位于第二边对侧且沿第一方向延伸的第三边。第一边沿第一壳体件和第二壳体件的相接处的封装线延伸，以提高第一壳体件与第二壳体件的相接处的封装可靠性。通过控制第二边和 第三边在第二方向上的位置，控制第一区域和第二区域在第三方向上的重叠关系，进而使该折边区的形状可控。
本申请的一些实施例中，第一边与第二边相切设置。在第一边与第二边相切点处，第二回折部在相切点处沿二方向向第二面回折弯曲，以降低相切点处产生褶皱的风险。沿第三方向观察，第一部分位于第一边朝向第一面一侧的部分形成双折边结构第一部分位于第一边朝向第二面一侧的部分形成单折边结构。
本申请的一些实施例中，第一边在第一方向上弯曲设置。第一边沿第一壳体件和第二壳体件的相接处的封装线弯曲延伸，以与第一壳体件和第二壳体件的相接处的封装线适配，提高第一壳体件与第二壳体件的相接处的封装可靠性。
本申请的一些实施例中，沿第三方向观察，第一部分在第一方向上具有位于第一面和第二面之间的第三区域，以及在第一方向上位于第一面和第二面之外的第四区域。沿第二方向观察，第一部分在第三方向上具有与第一面重叠的第三区域，以及在第三方向上与第一面相离的第四区域。第三区域用于与第一侧部和第二侧部相接，提高第一侧部和第二侧部的相接处的封装可靠性。第四区域用于与电池沿第一方向两端的封边部连接，提高壳体整体的封装可靠性。
本申请的一些实施例中，沿第三方向，第一区域和第二区域至少部分重叠，使第一部分形成折边区，并且通过控制第一区域和第二区域之间的重叠关系使该折边区的形状可控，用以降低第一部分产生褶皱的风险，进而降低褶皱对电池的影响。
本申请的一些实施例中，第一部分设有第一层，第一区域与第二区域通过第一层相接。第一区域与第二区域通过第一层相接，以提高第一部分结构的稳定性，并能降低电池在第三方向上占用的空间，提高电池的能量密度。
本申请的一些实施例中，沿第三方向观察，第一面以从与第二面相反的一侧突出的方式弯曲，以提高壳体容纳电极组件的空间，提高电池的能量密度。
本申请的一些实施例中，沿第三方向观察，第二面以从第一面一侧突出的方式弯曲，以使电池在第一方向上具有相同的弯曲趋势，便于电池适配于电子设备中预设的弯曲电池仓，满足电子设备个性化的需求。
本申请的一些实施例中，沿第二方向，第一区域的两端部之间的第一距离包含比第二区域的两端部之间的第二距离更长的部分，该部分即为第一回折部未被第二回折部覆盖的第三部分，第三部分用于与电池沿第一方向两端的封边部连接，提高壳体整体的封装可靠性。
本申请的一些实施例中，沿第二方向，第一区域的两端部之间的第一距离包含比第二区域的两端部之间的第二距离更短的部分，该部分即为第一回折部与第二回折部重叠的第四部分，第四部分形成折边区，通过控制第一区域和第二区域之间的重叠关系使该折边区的形状可控，用以降低第一部分产 生褶皱的风险，进而降低褶皱对电池的影响。
本申请的一些实施例中，在第三区域中，沿第二方向，第一区域的两端部之间的第一距离包含比第二区域的两端部之间的第二距离更短的部分，该部分即为第一回折部与第二回折部重叠的第四部分，第四部分形成折边区，通过控制第一区域和第二区域在第三方向上的重叠关系使该折边区的形状可控，用以降低第一部分产生褶皱的风险，进而降低褶皱对电池的影响。
本申请的一些实施例中，在第四区域中，沿第二方向，第一区域的两端部之间的第一距离包含比第二区域的两端部之间的第二距离更长的部分，该部分即为第一回折部未被第二回折部覆盖的第三部分，第三部分用于与电池沿第一方向两端的封边部连接，提高壳体整体的封装可靠性。
本申请的实施例还提供一种用电设备，包括上述的电池。
本申请的实施例提供的电池和用电设备中，通过第一回折部和第二回折部沿第二方向回折使第一部分形成折边区，并且通过控制第一区域和第二区域在第三方向上的重叠关系使该折边区的形状可控。具体地，第一区域使第一回折部自第一连接部沿第二方向向第一面回折弯曲，用以降低第一回折部沿不同的方向弯曲从而重叠产生褶皱的风险，进而降低褶皱对电池的影响。并且第一回折部还能降低第一回折部远离第一壳体件和第二壳体件的相接处的侧边由于弯曲拉扯该相接处的风险，进而降低第一部分回折时对第一壳体件和第二壳体件的相接处产生的拉力，降低该相接处破裂导致电解液泄露的风险，进一步提高电池的安全性。
附图说明
图1为本申请一实施例中电池的第一结构示意图。
图2为本申请一实施例中电池的爆炸结构示意图。
图3为本申请一实施例中电池的壳体结构示意图。
图4为本申请一实施例中电池的第一侧面结构示意图。
图5为本申请一实施例中电池的第三部分沿第二方向的展开示意图。
图6为图4的III部中的第一局部放大示意图。
图7为图4的IV部中的第二局部放大示意图。
图8为图4的V部中的第三局部放大示意图。
图9为本申请一实施例中电池的第二侧面结构示意图。
图10为图9的第一局部放大示意图。
图11为本申请一实施例中电池的A-A第一剖面结构示意图。
图12为本申请一实施例中电池的B-B第二剖面结构示意图。
图13为本申请一实施例中电池的C-C第三剖面结构示意图。
图14为本申请一实施例中电池的D-D第四剖面结构示意图。
图15为本申请一实施例中电池的E-E第五剖面结构示意图。
图16为本申请一实施例中电池的第二结构示意图。
图17为本申请一实施例中电池的F-F第六剖面结构示意图。
图18为本申请一实施例中电池的第三结构示意图。
图19为本申请一实施例中电池的H-H第七剖面结构示意图。
图20为本申请一实施例中用电设备的结构示意图。
主要元件符号说明
电池                         100
用电设备                     200
电极组件                     10
第一导电部板                 11
第二导电部板                 12
壳体                         20
第一壳体件                   21
第一面                       211
第二壳体件                   22
第二面                       221
第一部分                     23
第一区域                     23a
第二区域                     23b
第三区域                     23c
第四区域                     23d
第一连接部                   23e
第二连接部                   23f
第一回折部                   231
第一边缘                     231a
第二回折部                   232
第二边缘                     232a
第一端部                     233
第一边                       234
第二边                       235
第三边                       236
第一层                       237
第一部位                     237a
第二部位                     237b
第二层                       238
第二部分                     24
第一侧部                     31
第三侧部                     32
第五侧部                     33
第七侧部                     34
第二侧部                     41
第四侧部                     42
第六侧部                     43
第八侧部                     44
第三部分                     51
第四部分                     52
相切点                       60
第一方向                     X
第二方向                     Z
第三方向                     Y
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。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。本文所使用的术语“垂直的”、“水平的”、“左”、“右”、“顶”、“底”以及类似的表述只是为了说明的目的，并不用于限制本申请。
可以理解，实际生产或使用的状态中，当两元件平行设置时，两元件之间可存在一定的夹角，两元件之间的夹角允许存在0-±5％的公差，例如当两元件垂直存在公差时，其中一元件向靠近或远离另一元件倾斜，两元件之间的公差范围为0°～4.5°，其中不包括0°。当两元件的投影相同或重叠时，两元件之间允许存在0-±10％的公差，例如其中一个元件与另一元件的投影形状相同，投影面积存在0-±10％的公差。
本申请的实施例提供一种电池，包括电极组件和连接于电极组件的第一导电部板，以及覆盖第一导电部板至少一部分的壳体。壳体包括第一壳体件和第二壳体件，第一壳体件包括沿第一方向弯曲的第一面，第二壳体件包括在第二方向上与第一面间隔设置的第二面。第二方向垂直于第一方向。第二面沿第一方向弯曲并与第一面共同夹持电极组件。壳体还包括第一部分，沿第三方向，第一部分的投影与电极组件的投影至少部分重叠。第三方向与第一方向和第二方向均垂直。第一壳体件与第二壳体件相接。第一部分包括第一回折部、第二回折部以及第一端部。第一回折部连接于第一壳体件和第二 壳体件的相接处，第一端部与第一壳体相离，第二回折部位于第一回折部和第一端部之间。沿第二方向，电池还包括与第一面和第一部分相接的第一侧部，以及与第二面和第一部分相接的第二侧部，第一部分还包括位于第一回折部与第二回折部之间且在第三方向上朝向第一侧部的第一区域，以及位于第二回折部与第一端部之间且在第三方向上朝向第二侧部的第二区域。
本申请的实施例提供一种用电设备，包括上述的电池。
本申请的实施例提供的电池和用电设备中，通过第一回折部和第二回折部沿第二方向回折使第一部分形成折边区，并且通过控制第一区域和第二区域在第三方向上的重叠关系使该折边区的形状可控。具体地，第一区域使第一回折部自第一连接部沿第二方向向第一面回折弯曲，用以降低第一回折部沿不同的方向弯曲从而重叠产生褶皱的风险，进而降低褶皱对电池的影响。并且第一回折部还能降低第一回折部远离第一壳体件和第二壳体件的相接处的侧边由于弯曲拉扯该相接处的风险，进而降低第一部分回折时对第一壳体件和第二壳体件的相接处产生的拉力，降低该相接处破裂导致电解液泄露的风险，进一步提高电池的安全性。
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及图2，本申请提供了一种电池100，包括电极组件10和连接于电极组件10的第一导电部板11，以及覆盖第一导电部板11至少一部分的壳体20。
壳体20包括第一壳体件21和第二壳体件22。第一壳体件21和第二壳体件22沿第二方向Z相对设置。第一方向X垂直于第二方向Z，第一壳体件21包括沿第一方向X弯曲的第一面211。第二壳体件22包括在第二方向Z上与第一面211间隔设置的第二面221。其中，第二面221沿第一方向X弯曲并与第一面211共同夹持电极组件10。
在一些实施例中，电极组件10为沿第一方向X弯曲的弧形结构。
在一些实施例中，电极组件10为卷绕式结构或叠片式结构。
在一些实施例中，第一导电部板11沿第一方向X自壳体20中伸出。可以理解的是，在一些实施例中，电池100还包括第二导电部板12，第二导电部板12沿第一方向X自壳体20中伸出，第二导电部板12与第一导电部板11间隔设置并带有不同的极性。在一些实施例中，第一导电部板11为正极极耳，第二导电部板12为负极极耳。
请参阅图3，在一些实施例中，电池100还包括与第一面211和第一部分23相接的第一侧部31，以及与第二面221和第一部分23相接的第二侧部41。具体地，第一回折部231与第一侧部31相接，第二回折部232至少部分与第二侧部41相接，以进一步降低电池100在第三方向Y上占用的空间，提高电池100的能量密度。
在一些实施例中，电池100还包括第三侧部32、第五侧部33和第七侧部34。第一侧部31、第三侧部32、第五侧部33和第七侧部34从第一面211 沿第二方向Z延伸。且第一侧部31、第三侧部32、第五侧部33和第七侧部34围合成容纳电极组件10的腔体。
在一些实施例中，电池100还包括第四侧部42、第六侧部43和第八侧部44。第二侧部41、第四侧部42、第六侧部43和第八侧部44从第二面221沿第二方向Z向第一面211延伸。且第二侧部41、第四侧部42、第六侧部43和第八侧部44围合成容纳电极组件10的腔体。第二侧部41远离第二面221的侧边与第一侧部31远离第一面211的侧边连接并形成第一壳体件21和第二壳体件22的相接处的封装线，第一部分23用于密封该封装线，以提高第一壳体件21与第二壳体件22的相接处的封装可靠性。
在一些实施例中，壳体20还包括第一部分23。沿第三方向Y，第一部分23的投影与电极组件10的投影至少部分重叠。第三方向Y与第一方向X和第二方向Z均垂直。
请一并参阅图4，第一壳体件21与第二壳体件22相接，用以在第二方向Z上夹持电极组件10。第一部分23包括第一回折部231、第二回折部232以及第一端部233。第一回折部231连接于第一壳体件21和第二壳体件22的相接处，第一端部233与第一壳体件21相离，第二回折部232位于第一回折部231和第一端部233之间。至少部分第二回折部232与第一壳体件21和/或第二壳体件22相接。
在一些实施例中，沿第三方向Y，第一回折部231的投影与电极组件10的投影至少部分重叠，且第二回折部232的投影与电极组件10的投影至少部分重叠。
在一些实施例中，沿第一方向X，第一回折部231包括第一边缘231a，第二回折部232包括与第一边缘231a相接的第二边缘232a，第一边缘231a和第二边缘232a均远离第一壳体件21。
第一部分23用于提高第一壳体件21与第二壳体件22的相接处的封装可靠性，进而提高电池100的安全性。具体地，在第一部分23中，第一回折部231连接于第一壳体件21和第二壳体件22的相接处以密封第一壳体件21和第二壳体件22的相接处。并且通过第一回折部231降低第一部分23回折时对第一壳体件21和第二壳体件22的相接处产生的拉力，以降低该相接处破裂导致电解液泄露的风险。
请一并参阅图5，第一部分23还包括位于第一回折部231与第二回折部232之间的第一区域23a，以及位于第二回折部232与第一端部233之间的第二区域23b。第一部分23还包括第一连接部23e和第二连接部23f。第一连接部23e一侧连接于第一回折部231，另一侧连接于第一壳体件21与第二壳体件22的相接处。第二连接部23f一侧连接于第一回折部231远离第一连接部23e的部分，另一侧连接于第二回折部232。第一连接部23e和第二连接部23f反向弯曲设置，以使第一区域23a和第二区域23b在第二方向Z上沿第二方向回折。
第一区域23a在第三方向Y上朝向第一侧部31使第一回折部231自第 一连接部23e沿第二方向Z向第一面211回折弯曲。第二区域23b在第三方向Y上朝向第二侧部41使第二回折部232沿第二方向Z向第二面221回折弯曲。
第一回折部231和第二回折部232在第二方向Z上回折使第一部分23形成折边区，并且通过控制第一区域23a和第二区域23b在第三方向Y上的重叠关系使该折边区的形状可控。第一区域23a使第一回折部231自第一连接部23e沿第二方向Z向第一面211回折弯曲，用以降低第一回折部231沿不同的方向弯曲从而重叠产生褶皱的风险，进而降低褶皱对电池100的影响。并且第一回折部231还能降低第一回折部231远离第一壳体件21和第二壳体件22的相接处的侧边由于弯曲拉扯该相接处的风险，进而降低第一部分23回折时对第一壳体件21和第二壳体件22的相接处产生的拉力，降低该相接处破裂导致电解液泄露的风险，进一步提高电池的安全性。
请继续参阅图4和图5，在一些实施例中，沿第二方向Z，第一部分23包括朝向第一面211一侧回折而成的沿第一方向X延伸的第一边234。第一边234沿第一壳体件21和第二壳体件22的相接处的封装线延伸，以提高第一壳体件21与第二壳体件22的相接处的封装可靠性。第一部分23还包括在第一区域23a和第二区域23b的连接部分中朝向第二面221一侧回折而成的沿第一方向X延伸的第二边235，以及在第二区域23b中位于第二边235沿第二方向Z的对侧且沿第一方向X延伸的第三边236。通过控制第二边235和第三边236在第二方向Z上的位置，控制第一区域23a和第二区域23b在第三方向Y上的重叠关系，进而使该折边区的形状可控。
在一些实施例中，沿第三方向Y观察，第二边235位于第一边234和第一面211之间，以使第一回折部231位于第一边234和第一面211之间。第三边236位于第一面211和第二面221之间，以使第二回折部232位于第一面211和第二面221之间。通过该设置降低第一部分23在第二方向Z上凸出第一面211和/或第二面221的风险，以控制电池100在第二方向Z上占用的空间，提高电池100的能量密度。
请继续参阅图4，在一些实施例中，第一边234在第一方向X上弯曲设置。具体地，第一壳体件21和第二壳体件22的相接处的封装线沿第一方向X弯曲设置。第一边234沿第一壳体件21和第二壳体件22的相接处的封装线弯曲延伸，以与第一壳体件21和第二壳体件22的相接处的封装线适配，提高第一壳体件21与第二壳体件22的相接处的封装可靠性。
请参阅图6和图11，在一些实施例中，第一边234与第二边235相切设置，在第一边234与第二边235相切点60处，第二回折部232沿第二方向Z向第二面221回折弯曲，以降低相切点60处产生褶皱的风险。沿第三方向Y观察，第一部分23位于第一边234朝向第一面211一侧的部分形成双折边结构，第一部分23位于第一边234朝向第二面221一侧的部分形成单折边结构。
具体在一些实施中，第一边234在第一方向X上弯曲设置，第一边234 与第二边235相切于第一边234在第一方向X上的中点位置。该中点位置允许存在0至±5％的公差范围。
请一并参阅图7和图8，在一些实施例中，沿第三方向Y，第一区域23a和第二区域23b至少部分重叠，使第一部分23形成折边区，并且通过控制第一区域23a和第二区域23b之间的重叠关系使该折边区的形状可控。第一区域23a使第一回折部231自第一连接部23e沿第二方向Z向第一面211回折弯曲，用以降低第一回折部231沿不同的方向弯曲从而重叠产生褶皱的风险，进而降低褶皱对电池100的影响。并且第一区域23a还能降低第一回折部231远离第一壳体件21和第二壳体件22的相接处的侧边由于弯曲拉扯该相接处的风险，进而降低第一部分23回折时对第一壳体件21和第二壳体件22的相接处产生的拉力，降低该相接处破裂导致电解液泄露的风险，进一步提高电池的安全性。
请参阅图7、图12和图14，在一些实施例中，第一区域23a的两端部之间的第一距离L1即为第一边234和第二边235在第二方向Z上的间距；第二区域23b的两端部之间的第二距离L2即为第二边235和第三边236在第二方向Z上的间距。沿第二方向Z，第一区域23a的两端部之间的第一距离L1包含比第二区域23b的两端部之间的第二距离L2更长的部分，该部分即为第一回折部231远离第二回折部232的第三部分51。在一些实施例中，第三部分51位于第一区域23a沿第一方向X的两端，便于与电池100沿第一方向X两端的封边部连接，提高壳体20整体的封装可靠性。
可以理解的是，第一区域23a的两端部之间的第一距离L1包含比第二区域23b的两端部之间的第二距离L2更短的部分，定义该部分中的第一距离L1为第三距离L3，该部分即为第一回折部231与第二回折部232重叠的第四部分52，第四部分52形成折边区，通过控制第一区域23a和第二区域23b之间的重叠关系使该折边区的形状可控，用以降低第一部分23产生褶皱的风险，进而降低褶皱对电池100的影响。
请参阅图8、图13和图15，在一些实施例中，沿第二方向Z，第一区域23a的两端部之间的第一距离L1包含比第二区域23b的两端部之间的第二距离L2更短的部分，该部分即为第一回折部231与第二回折部232重叠的第四部分52，第四部分52形成折边区，通过控制第一区域23a和第二区域23b之间的重叠关系使该折边区的形状可控，用以降低第一部分23产生褶皱的风险，进而降低褶皱对电池100的影响。
请再次参阅图4，具体在一些实施例中，第一区域23a的两端部之间的第一距离L1与第二区域23b的两端部之间的第二距离L2之间的关系为：沿第一方向X，第一距离L1先大于第二距离L2；然后第一距离L1与第二距离L2之间的距离差逐渐减小直至相等；然后第二距离L2大于第一距离L1，且第一距离L1与第二距离L2之间的距离差逐渐增大直至第一距离L1处于最小值(例如第一边234与第二边235相切时第一距离L1等于零)；然后第一距离L1与第二距离L2之间的距离差逐渐减小直至相等；最后第一距离L1 大于第二距离L2，且第一距离L1与第二距离L2之间的距离差逐渐增大。
请再次参阅图3，在一些实施例中，沿第三方向Y观察，第一部分23在第一方向X上具有位于第一面211和第二面221之间的第三区域23c，以及在第一方向X上位于第一面211和第二面221之外的第四区域23d。第三区域23c用于与第一侧部31和第二侧部41相接，提高第一侧部31和第二侧部41的相接处的封装可靠性。第四区域23d用于与电池100沿第一方向X两端的封边部连接，提高壳体20整体的封装可靠性。
在一些实施例中，在第三区域23c中，沿第二方向Z，第一区域23a的两端部之间的第一距离L1包含比第二区域23b的两端部之间的第二距离L2更短的部分，该部分即为第一回折部231与第二回折部232重叠的第四部分52，第四部分52形成折边区，通过控制第一区域23a和第二区域23b之间的重叠关系使该折边区的形状可控，用以降低第一部分23产生褶皱的风险，进而降低褶皱对电池100的影响。
在一些实施例中，在第四区域23d中，沿第二方向Z，第一区域23a的两端部之间的第一距离L1包含比第二区域23b的两端部之间的第二距离L2更长的部分，该部分即为第一回折部231未被第二回折部232覆盖的第三部分51。第三部分51便于与电池100沿第一方向X一端的封边部连接，提高壳体20整体的封装可靠性。
请参阅图9和图10，在一些实施例中，第一部分23设有第一层237。具体地，当第一部分23的第一回折部231和第二回折部232沿第三方向Y展开至同一平面时，第一部分23设有沿第二方向Z相对设置的第一层237和第二层238，第一层237朝向第二面221，第二层238朝向第一面211。
在一些实施例中，当第一部分23的第一回折部231和第二回折部232回折完成时，沿第三方向Y，第一层237包括第一部位237a和第二部位237b。第一部位237a位于第一回折部231和第二回折部232之间，第一回折部231和第二回折部232通过第一部位237a相接固定，以提高第一回折部231和第二回折部232之间结构的稳定性。第二部位237b位于第二回折部232和第二侧部41之间，第二回折部232和第二侧部41通过第二部位237b相接固定，以提高第二回折部232和第二回折部232之间结构的稳定性。第二层238位于第一回折部231和第一侧部31之间，第一回折部231和第一侧部31通过第二层238相接固定，以提高第一回折部231和第一侧部31之间结构的稳定性。
在一些实施例中，第一层237由聚氨酯或聚烯烃等材料制成；第二层238由聚氨酯或聚烯烃等材料制成。
在一些实施例中，电池100还包括第二部分24，第六侧部43远离第二面221的侧边与第五侧部33远离第一面211的侧边连接并形成即为第一壳体件21和第二壳体件22的相接处的封装线，第二部分24用于密封该封装线，以提高第一壳体件21与第二壳体件22的相接处的封装可靠性。第二部分24与第一部分23的结构相同，第二部分24与第一部分23对称设置，在 此不作赘述。
请再次参阅图1和图2，在一些实施例中，沿第三方向Y观察，第二面221以从第一面211一侧突出的方式弯曲，以使电池100在第一方向X上具有相同的弯曲趋势，便于电池100适配于电子设备中预设的弯曲电池仓，满足电子设备个性化的需求。
请参阅图16，在一些实施例中，沿第三方向Y观察，第一面211以从与第二面221相反的一侧突出的方式弯曲，以提高壳体20容纳电极组件10的空间，提高电池100的能量密度。
请参阅图17，在一些实施例中，第一边234与第二边235相切设置，第一边234与第二边235相切点60处，第二回折部232在相切点60处沿第二方向Z向第二面221回折弯曲，以降低该相切点60处产生褶皱的风险。沿第三方向Y观察，第一部分23位于第一边234朝向第一面211一侧的部分形成双折边结构，第一部分23位于第一边234朝向第二面221一侧的部分形成单折边结构。
请参阅图18和图19，在一些实施例中，第一边234与第二边235在第二方向Z上间隔设置，沿第三方向Y观察，第二边235位于第一边234和第一面211之间，第一部分23位于第一边234朝向第一面211一侧的部分形成双折边结构，第一部分23位于第一边234朝向第二面221一侧的部分形成单折边结构。通过第一边234与第二边235在第二方向Z上间隔设置增加双折边结构的面积，进而减小第二回折部232在第二方向Z上占用的空间，提高电池100的能量密度。
请参阅图20，本申请实施例还提供了一种用电设备200，包括上述实施例中的任意一种电池100，电池100用于给用电设备200供电。
上述电池100和用电设备200中，通过第一回折部231和第二回折部232在第二方向Z上沿回折使第一部分23形成折边区，并且通过控制第一区域23a和第二区域23b在第三方向Y上的重叠关系使该折边区的形状可控。第一区域23a使第一回折部231自第一连接部23e沿第二方向Z向第一面211回折弯曲，用以降低第一回折部231沿不同的方向弯曲从而重叠产生褶皱的风险，进而降低褶皱对电池100的影响。并且第一回折部231还能降低第一回折部231远离第一壳体件21和第二壳体件22的相接处的侧边由于弯曲拉扯该相接处的风险，进而降低第一部分23回折时对第一壳体件21和第二壳体件22的相接处产生的拉力，降低该相接处破裂导致电解液泄露的风险，进一步提高电池的安全性。
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 (14)

  1. 一种电池，包括电极组件和连接于所述电极组件的第一导电部板，以及覆盖所述第一导电部板至少一部分的壳体，其特征在于，
    所述壳体包括第一壳体件和第二壳体件，所述第一壳体件包括沿第一方向弯曲的第一面，所述第二壳体件包括在第二方向上与所述第一面间隔设置的第二面，所述第二方向垂直于所述第一方向，所述第二面沿所述第一方向弯曲并与所述第一面共同夹持所述电极组件，
    所述壳体还包括第一部分，沿第三方向，所述第一部分的投影与所述电极组件的投影至少部分重叠，所述第三方向与所述第一方向和所述第二方向均垂直，
    所述第一壳体件与所述第二壳体件相接，
    所述第一部分包括第一回折部、第二回折部以及第一端部，所述第一回折部连接于所述第一壳体件和所述第二壳体件的相接处，所述第一端部与所述第一壳体相离，所述第二回折部位于所述第一回折部和所述第一端部之间，
    沿所述第二方向，所述电池还包括与所述第一面和所述第一部分相接的第一侧部，以及与所述第二面和所述第一部分相接的第二侧部，
    所述第一部分还包括位于所述第一回折部与所述第二回折部之间且在所述第三方向上朝向所述第一侧部的第一区域，以及位于所述第二回折部与所述第一端部之间且在所述第三方向上朝向所述第二侧部的第二区域。
  2. 如权利要求1所述的电池，其特征在于，沿所述第二方向，所述第一部分包括朝向所述第一面一侧回折而成的沿所述第一方向延伸的第一边、在所述第一区域中朝向所述第二面一侧回折而成的沿所述第一方向延伸的第二边，以及在所述第二区域中位于所述第二边对侧且沿所述第一方向延伸的第三边。
  3. 如权利要求2所述的电池，其特征在于，所述第一边与所述第二边相切设置。
  4. 如权利要求2所述的电池，其特征在于，所述第一边在所述第一方向上弯曲设置。
  5. 如权利要求1所述的电池，其特征在于，沿所述第三方向观察，所述第一部分在所述第一方向上具有位于所述第一面和所述第二面之间的第三区域，以及在所述第一方向上位于所述第一面和所述第二面之外的第四区域。
  6. 如权利要求1所述的电池，其特征在于，沿所述第三方向，所述第一区域和所述第二区域至少部分重叠。
  7. 如权利要求1所述的电池，其特征在于，所述第一部分设有第一层，所述第一区域与所述第二区域通过所述第一层相接。
  8. 如权利要求1所述的电池，其特征在于，沿所述第三方向观察，所述第一面以从与所述第二面相反的一侧突出的方式弯曲。
  9. 如权利要求8所述的电池，其特征在于，沿所述第三方向观察，所述 第二面以从第一面一侧突出的方式弯曲。
  10. 如权利要求1所述的电池，其特征在于，沿所述第二方向，所述第一区域的两端部之间的第一距离包含比所述第二区域的两端部之间的第二距离更长的部分。
  11. 如权利要求1所述的电池，其特征在于，沿所述第二方向，所述第一区域的两端部之间的第一距离包含比所述第二区域的两端部之间的第二距离更短的部分。
  12. 如权利要求5所述的电池，其特征在于，在所述第三区域中，沿所述第二方向，所述第一区域的两端部之间的第一距离包含比所述第二区域的两端部之间的第二距离更短的部分。
  13. 如权利要求5所述的电池，其特征在于，在所述第四区域中，沿所述第二方向，所述第一区域的两端部之间的第一距离包含比所述第二区域的两端部之间的第二距离更长的部分。
  14. 一种用电设备，其特征在于，包括如权利要求1至13中任一项所述的电池。
PCT/CN2021/134468 2021-11-30 2021-11-30 电池及用电设备 WO2023097463A1 (zh)

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CN203674276U (zh) * 2014-01-20 2014-06-25 东莞新能源科技有限公司 软包装锂离子电池
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