WO2024017367A1 - 集流体、电池及电池包 - Google Patents

集流体、电池及电池包 Download PDF

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Publication number
WO2024017367A1
WO2024017367A1 PCT/CN2023/108579 CN2023108579W WO2024017367A1 WO 2024017367 A1 WO2024017367 A1 WO 2024017367A1 CN 2023108579 W CN2023108579 W CN 2023108579W WO 2024017367 A1 WO2024017367 A1 WO 2024017367A1
Authority
WO
WIPO (PCT)
Prior art keywords
folding
current collector
bent
bending
sub
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2023/108579
Other languages
English (en)
French (fr)
Inventor
徐卫东
何波
张男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Hithium Energy Storage Technology Co Ltd
Original Assignee
Xiamen Hithium Energy Storage Technology Co Ltd
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 Xiamen Hithium Energy Storage Technology Co Ltd filed Critical Xiamen Hithium Energy Storage Technology Co Ltd
Publication of WO2024017367A1 publication Critical patent/WO2024017367A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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 more specifically, to a current collector, a battery and a battery pack.
  • Lithium-ion batteries have become the first choice for green energy due to their high energy density, high voltage, low discharge rate, and long cycle life. Therefore, they are widely used in portable devices such as Bluetooth headsets, mobile phones, digital computers, and tablet computers, as well as in electric vehicles and storage. Energy power stations and other large equipment.
  • the current collector In comparison, when assembling the cover assembly of a cylindrical battery, the current collector needs to be folded. However, the folded part of the current collector is prone to breakage during vibration, especially vibration fatigue.
  • Embodiments of the present application provide a current collector, a battery and a battery pack.
  • the current collector in the embodiment of the present application includes a body and a folding component. At least part of the folding component can be bent relative to the body, the folding component includes at least two stacked folding parts, and at least one recess is provided on the folding part,
  • the folding component includes a bending part and a connecting part, the bending part is connected to the body through the connecting part, and the bending part can be bent relative to the connecting part.
  • At least part of the connecting portion is fixedly connected to one side of the body.
  • the orthogonal projected area of the bent portion on the body is greater than the orthogonal projected area of the connecting portion on the body.
  • the orthogonal projection area of the bent portion on the body is larger, ensuring the flow capacity of the current collector.
  • the area of the orthogonal projection of the connection part on the body is relatively small, so that the area occupied by the body when welded to the body is smaller, thereby ensuring that the body has sufficient space reserved for welding the tabs, thereby ensuring the overflow of the current collector. ability.
  • the orthographic projection of the bent portion on the body covers at least part of the connecting portion.
  • the main part of the bent portion is located directly above the main body, which is beneficial to preventing eccentricity problems when the current collector is inserted into the shell.
  • the thickness of the connecting portion is greater than the thickness of the body.
  • the thickness of the connecting part is greater than the thickness of the body, which can ensure the structural strength of the connection between the connecting part and the body.
  • the recess includes a first recess
  • the connection includes at least portions of at least two stacked folds
  • the first recess includes at least one first sub-recess
  • at least one of the The folding piece has the first sub-recess, which is located on an end side of the folding piece.
  • the connection part includes a first crease part connected to the first recessed part, and the bending part can be bent relative to the connection part along the first crease part.
  • the first fold includes at least portions of at least two stacked folds, the first fold includes two or more first sub-folds, and at least one of the folds has the A first sub-fold portion, the two or more first sub-fold portions are stacked.
  • the first recessed portion When the first recessed portion is used as a current collector for bending, such an arrangement makes the current collector folding more stable, makes the current collector less likely to be dislocated during bending, and increases the accuracy of the current collector bending.
  • the recessed portion includes a second recessed portion
  • the bent portion has at least one second recessed portion
  • the at least one second recessed portion is located on an end side of the bent portion.
  • the bending part includes at least part of at least two stacked folding parts
  • the second recess includes at least one second sub-recess
  • at least one of the folding parts has at least one second sub-recess
  • the second sub-recess is located on the end side of the folding element.
  • the bending portion can be bent along the second concave portion, which is beneficial to the folding of the folding member, that is, the folding of the current collector.
  • it can also ensure that the current collector is folded in the specified direction, and when it is subsequently assembled into a battery, it is helpful to prevent eccentricity problems when the current collector is inserted into the case. question.
  • the second concave portion can also be used as a limiting portion. The current collector can cooperate with the limiting member of other components (such as the lower plastic) through the second concave portion to limit the position of the current collector.
  • the second recessed portion When the second recessed portion is used as a current collector for bending, this arrangement makes the folding of the current collector better, and makes the bent current collector less likely to wrinkle, which is beneficial to current collector flow diversion.
  • the second concave portion When the second concave portion is used as a limiting portion, the second concave portion provided in this way can easily perform limiting fit with other components.
  • the second recesses are spaced apart on the same side of the bending part, and the shape of the two second recesses spaced along the same side of the bending part and / Or the sizes are the same or different, or the bending part includes a connected first end side and a second end side, the first end side has at least one second recess, and the second end side has at least one said second recess.
  • the second recess can also be provided in different shapes or sizes and located at different ends according to the specific functions of the second recess.
  • the second recess on the side can play different functional roles to avoid mutual interference.
  • the bending part includes a first bending part, a second bending part and a second folding part, and the second folding part is located between the first bending part and the third folding part. Between the two bending parts, the second folding part is connected to the second recessed part, and the first bending part can be bent relative to the second bending part along the second folding part. When the first bending part and the second bending part are in a flattened state, the second folding part is concave relative to the first bending part, and the second folding part is concave relative to the first bending part.
  • the second folded portion is concave, the second folded portion is composed of portions of the at least two folded pieces arranged in a stack, and the first bending portion includes the at least two folded pieces arranged in a stack.
  • the second bending portion includes portions of the at least two folded pieces arranged in a stack.
  • the number of the second recessed parts is two, and the two second recessed parts are respectively located at both ends of the second folded part, and the second folded part connects the two second recessed parts.
  • the second fold portion includes two or more second sub-fold portions, at least one of the folding pieces has the second sub-fold portion, and the two or more second sub-fold portions are stacked set up.
  • the second fold portion is connected to the second concave portion, and when the first bend portion is bent relative to the second bend portion along the second fold portion, the stability of the folding of the current collector can be improved, and the current collector can also be bent. It’s not easy to dislocate.
  • This is beneficial to the first bending part being bent relative to the second bending part along the second folding part, and is also beneficial to the first bending part being bent relative to the second bending part along the second folding part.
  • the folded portion connects two second recessed portions, that is, both ends of the second folded portion have second recessed portions. In this way, compared with only one end of the second folded portion having the second recessed portion, the first bent portion is along the second recessed portion.
  • At least one folding part has a second sub-folding part, and the second sub-folding parts on different folding parts are stacked, so that the first bending part is bent relative to the second bending part along the second folding part.
  • folding it can improve the stability of the current collector folding, and also prevent the current collector from being misaligned when bending, making the current collector more accurate when bending.
  • a buffer space can be reserved for the folded part after bending, thereby avoiding the problem of breakage of the current collector during vibration, especially vibration fatigue, thereby extending the service life of the current collector.
  • the length of at least one of the folds is greater than the distance between any two points of the body.
  • orthographic projections of two adjacent folded parts on the body at least partially overlap.
  • the body has at least one through hole extending therethrough.
  • the at least one through hole includes at least one first through hole or at least one second through hole.
  • the folding component is formed on the body.
  • the orthographic projection covers at least part of the first through hole. The area of the second through hole covered by the orthographic projection of the folding component on the body is zero.
  • opening at least one through hole on the body is beneficial to the circulation of electrolyte and/or is beneficial to reducing the local thickness of the body.
  • the electrolyte in the battery can flow through the first through hole, which is beneficial to evenly distributing the electrolyte in the battery. Since the body is provided with a second through hole, this is beneficial to reducing the local thickness of the body, thereby reducing the quality of the current collector.
  • the at least one second through hole is located on the same side of the bent folding component.
  • the body is provided with a second through hole, this is beneficial to reducing the local thickness of the body, thereby reducing the quality of the current collector.
  • the number of the second through holes is two or more, at least two of the second through holes are spaced apart, and the distance between the two second through holes that are spaced apart is less than The width of the folded piece.
  • any two second through holes are arranged at intervals.
  • the connection line between the shortest distance of any two adjacent second through holes is located at the end of the bent folding component on the body. Outside the orthographic projection.
  • at least part of the connection line between the shortest distances of any two adjacent second through holes is covered by the orthographic projection of the bent folding component on the body.
  • the body is provided with a second through hole, this is beneficial to reducing the local thickness of the body, thereby reducing the quality of the current collector.
  • the bent portion includes a first end and a second end, the first end is an end of the bent portion away from the connecting portion, and the second end is relative to the third end.
  • One end is close to the connecting part, and the first end has a channel or two channels spaced apart from each other in the middle of the first end.
  • the channel is configured to connect a pole, and at least part of the pole is located in the channel.
  • the bent portion includes at least part of at least two stacked folding pieces, each of the folding pieces is provided with a third through hole, and at least two of the third through holes are stacked to form the channel. .
  • the channel is provided in the middle of the bending part.
  • the stability of the connection between the pole and the bending part can be effectively increased.
  • each folding piece is provided with a third through hole, the pole passes through the entire folding assembly, thereby enhancing the stability of the connection between the current collector and the pole.
  • the current collector can be connected to two poles at the same time, thereby making the connection between the current collector and the battery more stable. Due to the provision of two channels, the current collector can be connected to two poles at the same time, thereby making the connection between the current collector and the battery more stable.
  • the width of the first end is greater than the width of the second end.
  • the width of the first end is greater than the width of the second end, the normal flow capacity of the current collector can be ensured.
  • the distance between the edges of two channels is less than the width of the second end.
  • edges of both channels include part of the current collector structure, ensuring the stability of the connection between the current collector and the pole.
  • the recessed portion includes a third recessed portion
  • the bent portion has at least one third recessed portion
  • at least one third recessed portion is located at an end side of the bent portion, or the third recessed portion
  • the recess is located between the first end and the second end, and the bending part can be bent along the third recess.
  • the at least two folds have different thicknesses.
  • the folding components Due to the different thickness settings of the folding components, it is possible to ensure the overall structural strength of the folding component, facilitate the bending of the folding component, and at the same time ensure the overcurrent capability of the folding component as a conductive component. Moreover, this can be matched according to the design of other components of the battery (such as the lower plastic or the form of the tabs or the structure of the poles) to increase the space available for installing the current collector.
  • the thickness of each said fold is in the range [0.05mm, 0.3mm].
  • each folded piece is within the range of [0.05mm, 0.3mm], which not only solves the problem of the current collector being easily broken during vibration fatigue, but also does not affect the normal folding of the current collector.
  • the side of the body away from the folding assembly has an escape notch, and the escape notch penetrates part of the edge of the body.
  • the escape notch can be used to avoid the explosion-proof valve.
  • the battery in the embodiment of the present application includes a bare cell, a casing and an end cover assembly. At least part of the bare cell is accommodated in the casing.
  • the end cover assembly is connected to the bare cell.
  • the end cover assembly includes The cover plate and the current collector according to any one of the above embodiments, the cover plate is connected to the current collector.
  • the foldable folding components in the current collector into a multi-layer structure, it is beneficial to increase the rigidity of the folding components and reduce the possibility of fracture of the folding components, thereby solving the problem that the current collector is prone to vibration fatigue. breakage problem to extend battery life.
  • the shell is in the shape of a cylinder, and a direction parallel to the center line of the cylinder is defined as the first direction, and the orthographic projection of the bent folding component in the first direction At least part of falls on the body of the current collector or the bare cell.
  • the battery pack in the embodiment of the present application includes a battery box and the battery described in any of the above embodiments. At least part of the battery is contained in the battery box.
  • the foldable folding components in the current collector of the battery into a multi-layer structure, it is beneficial to increase the Increase the rigidity of the folding components and reduce the possibility of breakage of the folding components, thus solving the problem that the current collector is prone to breakage during vibration fatigue and extending the service life of the battery.
  • Figure 1 is a schematic three-dimensional structural diagram of a current collector in certain embodiments of the present application.
  • Figure 2 is a three-dimensional exploded schematic diagram of a current collector in certain embodiments of the present application.
  • Figure 3 is a schematic three-dimensional structural diagram of the current collector after bending in certain embodiments of the present application.
  • Figure 4 is a schematic diagram of the orthographic projection of the bent portion and the connecting portion on the body after the current collector is bent in some embodiments of the present application;
  • Figure 5 is a schematic three-dimensional structural diagram of the folding member in the current collector in some embodiments of the present application.
  • Figure 6 is a three-dimensional exploded schematic view of the folding member in the current collector in some embodiments of the present application.
  • Figure 7 is a schematic three-dimensional structural diagram of the folding member in the current collector in some embodiments of the present application.
  • Figure 8 is a three-dimensional exploded schematic view of the folding member in the current collector in some embodiments of the present application.
  • Figures 9 and 10 are schematic three-dimensional structural diagrams of current collectors in certain embodiments of the present application.
  • Figure 11 is a three-dimensional exploded schematic diagram of a current collector in certain embodiments of the present application.
  • Figure 12 is a schematic three-dimensional structural diagram of the current collector and pole in certain embodiments of the present application.
  • Figure 13 is a schematic structural diagram of a battery in certain embodiments of the present application.
  • Figure 14 is a schematic three-dimensional structural diagram of a battery in certain embodiments of the present application.
  • Figure 15 is a schematic structural diagram of a battery pack in certain embodiments of the present application.
  • Folding assembly 20 folding piece 21, bending part 22, sub-bending part 221, first bending part 223, first sub-bending part 2231, second bending part 222, second sub-bending part 2221, One end side 2201, second end side 2202, first end 2203, second end 2204, connection part 23, sub-connection part 231, recessed part 40, first recessed part 25, first sub-recessed part 251, first crease part 26 , the first sub-fold part 261, the second recessed part 27, the second sub-recessed part 271, the second folded part 28, the second sub-folded part 281, the third recessed part 29, the channel 30, the third through hole 3;
  • End cover assembly 1000 cover plate 300;
  • a first feature "on” or “under” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. touch.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • "Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
  • An embodiment of the present application provides a current collector 100 .
  • the current collector 100 includes a body 10 and a folding component 20 . At least part of the folding assembly 20 can be bent relative to the body 10 .
  • the folding assembly 20 includes at least two stacked folding pieces 21 provided with at least one recess 40 . During the vibration process, especially when vibration fatigue occurs, the bent portion of the current collector 100 is prone to breakage. However, in the current collector 100 of the present application, the folding assembly 20 includes at least two folds stacked together.
  • the component 21 is conducive to increasing the rigidity of the folding component 20 and reducing the possibility of breakage of the folding component 20, thus solving the problem that the current collector 100 is easily broken during vibration fatigue and extending the service life of the current collector 100.
  • the folding assembly 20 includes a plurality of stacked folding pieces 21 . Wherein, multiple folding pieces 21 can be bonded together through adhesive to form the folding assembly 20 . As shown in FIG. 2 , the folding assembly 20 includes five folding pieces 21 . Five folding pieces 21 are stacked together to form the folding assembly 20 .
  • the length of at least one folding member 21 is greater than the distance between any two points of the body 10 .
  • the folding member 21 can be bent to a greater extent, and the vibration-absorbing function of the current collector 100 can be enhanced.
  • the folding assembly 20 includes five folding pieces 21 , and the lengths of the five folding pieces 21 are the same and greater than the distance between any two points of the body 10 .
  • the width of at least one folding piece 21 is smaller than the width of the body 10 between two sides of the folding piece 21 .
  • the folding assembly 20 includes five folding pieces 21 , the widths of the five folding pieces 21 are the same and smaller than the width of the body 10 between two sides of the folding pieces 21 .
  • the folding component 20 includes a bending portion 22 and a connecting portion 23.
  • the bending portion 22 is connected to the body 10 through the connecting portion 23.
  • the bending portion 22 can be bent relative to the connecting portion 23.
  • each folding part 21 includes a sub-bending part 221 and a sub-connecting part 231.
  • the multiple sub-bending parts 221 are stacked to form the bending part 22.
  • the sub-connection parts 231 are stacked to form the connection part 23 .
  • the bending part 22 is connected to the main body 10 through the connecting part 23 , and the bending part 22 can be bent relative to the connecting part 23 , so that the bending part 22 can be bent relative to the main body 10 .
  • the connecting portion 23 can be welded to the main body 10 as a whole, so that the multi-layer folding component 20 and the main body 10 can be tightly connected to ensure the reliability of the connection between the multi-layer folding component 20 and the main body 10 .
  • the thickness of the connecting portion 23 is greater than the thickness of the body 10 , so as to ensure the structural strength of the connection between the connecting portion 23 and the body 10 .
  • the body 10 may adopt a single-layer hard disk-shaped structure, which can reduce the manufacturing cost of the current collector 100 and facilitate manufacturing.
  • the body 10 may also have a multi-layer structure, which is not limited here.
  • the embodiments of the present application are all described taking the body 10 as a single-layer hard disc-shaped structure as an example.
  • At least part of the connecting portion 23 is fixedly connected to one side of the body 10 . At least part of the connecting portion 23 can be welded to the body 10 as a whole. In this way, the multi-layer folding component 20 and the main body 10 can be tightly connected, ensuring the reliability of the connection between the multi-layer folding component 20 and the main body 10 .
  • the folding component 20 includes a folding part a1 , a folding part a2 , a folding part a3 , a folding part a4 and a folding part a5 .
  • the folding piece a2 is stacked on the folding piece a1
  • the folding piece a3 is stacked on the folding piece a2
  • the folding piece a4 is stacked on the folding piece a3
  • the folding piece a5 is stacked on the folding piece a4
  • the folding piece a1 sub-connection portion 231 One end away from the sub-bending portion 221 is connected to the body 10 .
  • at least part of the connecting portion 23 can be fixedly connected to one side of the body 10 .
  • the folding part a1 can be connected to the body 10 first, and then the folding part a2 can be stacked on the folding part a1, and the folding part a3 can be stacked on the folding part a2.
  • the folded piece a4 is laminated on the folded piece a3 and the folded piece a5 is laminated on the folded piece a4 to form the current collector 100 .
  • the five folding parts 21 can also be assembled into the folding assembly 20 first and then connected to the main body 10 , which is not limited here.
  • FIG. 3 shows the state of the folding component 20 after being bent relative to the body 10 .
  • the orthographic projection of the bent portion 22 on the body 10 covers at least part of the connecting portion 23 .
  • the orthogonal projected area of the bent portion 22 on the body 10 is larger than the orthogonal projected area of the connecting portion 23 on the body 10 .
  • FIG. 4 is a schematic diagram of the projection of the bending part 22 and the connecting part 23 on the body 10 after the bending part 22 is bent.
  • S1 in Figure 4 represents the orthographic projection of the bent portion 22 on the body 10
  • S2 in Figure 4 represents the orthographic projection of the connecting portion 23 on the body 10. It can be seen that the bent portion
  • the area of the orthographic projection S1 of 22 on the body 10 is larger than the area of the orthographic projection S2 of the connecting portion 23 on the body 10 .
  • the current collector 100 can have a larger heat dissipation area, which is conducive to heat dissipation; on the other hand, because the connecting portion The area of 23 is relatively small, so that when it is welded to the body 10, it occupies a smaller area of the body 10 to ensure that the body 10 has sufficient space reserved for welding the tabs, thereby ensuring the current flow capacity of the current collector 100.
  • At least part of the orthographic projection of the bent portion 22 on the body 10 overlaps with the orthographic projection of the connecting portion 23 on the body 10 . That is, the main part of the bent portion 22 is located directly above the body 10 , which is helpful to prevent the current collector 100 from eccentricity during the process of being inserted into the shell.
  • the orthographic projections of two adjacent bent folding parts 21 on the body 10 at least partially overlap.
  • the orthographic projections of two adjacent bent folding members 21 on the body 10 completely overlap, which is helpful to prevent eccentricity problems of the current collector 100 during the process of inserting the current collector 100 into the housing.
  • the recessed portion 40 includes a first recessed portion 25.
  • the connection between the connecting portion 23 and the bending portion 22 has at least one first recessed portion 25.
  • the at least one first recessed portion 25 is located on the end side of the connection. .
  • the connection includes two opposite end sides, and at least one of the two end sides is provided with the first recess 25 . Since there is at least one first recess 25 at the connection between the connecting part 23 and the bending part 22, the bending part 22 can be bent along the first recess 25 relative to the connecting part 23, which is beneficial to the folding of the folding assembly 20, that is, there is Facilitating folding of the current collector 100 . In addition, it can also ensure that the current collector 100 is folded in a specified direction, and when it is subsequently assembled into the battery 2000, it is helpful to prevent eccentricity problems of the current collector 100 during the process of being inserted into the case.
  • the first concave portion 25 can also be used as a limiting portion.
  • the current collector 100 can cooperate with the first recess 25 and the limiting member of other components (such as lower plastic) to limit the position of the current collector 100 . This can reduce the complexity of assembling the battery 2000.
  • the number of the first recessed portions 25 is two, and the two first recessed portions 25 are respectively located at both ends of the connection between the bending portion 22 and the connecting portion 23 .
  • the bent portion 22 can be located along the bending portion 22 and the connecting portion 23.
  • the two first recesses 25 at both ends of the connecting portion 23 are bent relative to the connecting portion 23 , which facilitates the bending of the folding assembly 20 , thereby improving the folding stability of the current collector 100 .
  • the first recessed portion 25 is used as a limiting portion, since the two first recessed portions 25 are respectively located at both ends of the connection, it can provide a better stable positioning effect on the entire current collector 100 .
  • connection includes at least part of at least two stacked folding parts 21
  • the first recess 25 includes at least one first sub-recess 251
  • at least one folding part 21 has the first sub-recess 251 .
  • the sub-recess 251 is located on the end side of the folding piece 21 .
  • the first recess 25 When the first recess 25 is bent and used as the current collector 100, since the connection includes at least part of at least two stacked folding parts 21, the first recess 25 includes at least one first sub-recess 251, and the at least one folding part 21
  • the end side has a first sub-recess 251, which can make the folding of the current collector 100 more stable, and can also make the bent current collector 100 less likely to wrinkle, which is beneficial to the current collector 100 for flow guidance.
  • the first recess 25 when used as a limiting part, since the connection includes at least part of at least two stacked folding parts 21 , the first recess 25 includes at least one first sub-recess 251 , and the end side of at least one folding part 21 The first sub-recessed portion 251 is provided, thereby reducing the difficulty of limited fit between the first recessed portion 25 and other components.
  • At least two folding parts 21 include a first folding part 21 and a second folding part 21 , the first folding part 21 and the second folding part 21 are stacked, and the first folding part 21 has a first sub-folding part 21 .
  • the second folding part 21 has a first sub-recess 251, and the first sub-recess 251 of the first folding part 21 and the first sub-recess 251 of the second folding part 21 are stacked.
  • the first sub-recess 251 of the first folding part 21 and the first sub-recess 251 of the second folding part 21 are stacked, so that in the first recess 25
  • the folding stability of the current collector 100 can be improved and the current collector 100 can be ensured to have a better flow guiding effect;
  • the first recessed portion 25 is used as a limiting portion, the stacked third recess 25 can be used as a limiting portion.
  • a sub-recessed part 251 can improve the stability of the first recessed part 25 and the limiting parts of other components (such as lower plastic) when they are limited and matched.
  • the number of folding parts 21 is multiple.
  • Each folding part 21 has a first sub-recess 251 , and the plurality of first sub-recesses 251 located on the same side of the connection are stacked. set up.
  • multiple first sub-recesses 251 located on the same side of different folding members 21 are stacked. In this way, when the first recess 25 is bent and used as the current collector 100, the current collector 100 can be bent.
  • the folding stability is better, and the current collector 100 can be ensured to have a better flow guiding effect; when the first concave portion 25 is used as a limiting portion, it can reduce the difficulty of the first concave portion 25 and other components in limiting the fit. Furthermore, the structural stability of the first recess 25 and other components is improved.
  • FIG. 6 is an exploded schematic view of the folding assembly 20
  • FIG. 5 is a schematic view of a plurality of folding parts 21 stacked.
  • the folding assembly 20 includes a folding piece a1, a folding piece a2, a folding piece a3, a folding piece a4 and a folding piece a5.
  • the folding parts a1, a2, a3, a4 and a5 all include a sub-bending part 221 and a sub-connecting part 231, and the sub-bending part 221 and the sub-connecting part 231 of each folding part 21 are Both ends of the connection point have a first sub-recessed part b1 and a second sub-recessed part b2 respectively.
  • the folding piece a1, the folding piece a2, the folding piece a3, the folding piece a4 and the folding piece a5 are stacked, the folding piece a1, the folding piece a2, the folding piece a5
  • the first sub-recessed portion b1 on one side of the connection between the sub-bending portion 221 and the sub-connecting portion 231 of the piece a3, the folding piece a4 and the folding piece a5 is stacked to form the first recess B1; located in the folding piece a1, the folding piece a2
  • the first sub-recessed part b2 on the other side of the connection between the sub-bending part 221 and the sub-connecting part 231 of the folding part a3, the folding part a4 and the folding part a5 is stacked to form the first recessed part B2.
  • the first recessed portion B1 and the first recessed portion B2 are located at both ends of the connection.
  • the first sub-recess 251 may be an arc-shaped groove. In this way, when the first recessed portion 25 is bent and used as the current collector 100, the folding stability of the current collector 100 can be improved, and the current collector 100 can be prevented from interfering with itself or other components when folded; in the first recessed portion When 25 is used as a limiting portion, it can reduce the difficulty of the first recessed portion 25 and other components for limiting the fit, and can also improve the structural stability of the first recessed portion 25 and other components.
  • connection includes a first fold portion 26, the first fold portion 26 is connected to the first recess 25, and the bending portion 22 can be relative to the connection portion 23 along the first fold portion 26. Bend. Since the first fold portion 26 is connected to the first recessed portion 25 , when the bending portion 22 is bent along the first fold portion 26 relative to the connecting portion 23 , the folding stability of the current collector 100 can be improved, and the current collector 100 can also be folded. Not easy to dislocate when bending.
  • the number of the first recessed parts 25 is two.
  • the two first recessed parts 25 are located at both ends of the connection.
  • the first folded part 26 connects the two first recessed parts 25 and the first folded part 26 is located at both ends. between the first recesses 25 . Since the first folded portion 26 is located between the two first recessed portions 25 , that is, both ends of the first folded portion 26 have the first recessed portions 25 , so compared with only one end of the first folded portion 26 having the first recessed portion 25 .
  • a recessed portion 25, when the bent portion 22 is bent relative to the connecting portion 23 along the first crease portion 26, can further improve the folding stability of the current collector 100, and also prevent the current collector 100 from being easily dislocated when bent.
  • the first fold portion 26 includes at least part of at least two stacked folding pieces 21, and the first fold portion 26 includes two or more first sub-folds. portion 261, at least one folding member 21 has a first sub-fold portion 261, and two or more first sub-fold portions 261 are stacked. Since at least one folding part 21 has the first sub-folding part 261 and the first sub-folding parts 261 on different folding parts 21 are stacked, the bending part 22 is connected relative to the first folding part 26 along the first folding part 26 . When the portion 23 is bent, the folding stability of the current collector 100 can be improved, and the current collector 100 can also be less easily dislocated when bent, so that the current collector 100 can be bent with higher accuracy.
  • FIG. 6 is an exploded schematic view of the folding assembly 20
  • FIG. 5 is a schematic view of a plurality of folding parts 21 stacked.
  • the folding assembly 20 includes a folding piece a1, a folding piece a2, a folding piece a3, a folding piece a4 and a folding piece a5.
  • the folding parts a1, a2, a3, a4 and a5 all include a sub-bending part 221 and a sub-connecting part 231, and the connection between the sub-bending part 221 and the sub-connecting part 231 of each folding part 21
  • There are first sub-recessed portions 251 at both ends of the folding piece 21 and each folding piece 21 has a first sub-fold portion 261 connecting the two first sub-recessed portions 251 .
  • the first sub-fold portion located at the folded parts a1, a2, a3, a4 and a5 261 are stacked to form the first crease portion 26 .
  • the recessed portion 40 includes a second recessed portion 27
  • the bent portion 22 has at least one second recessed portion 27
  • the at least one second recessed portion 27 is located at an end side of the bent portion 22 .
  • the bending portion 22 can be bent along the second concave portion 27 , which facilitates the folding of the folding assembly 20 , that is, the folding of the current collector 100 .
  • it can also ensure that the current collector 100 is folded in a specified direction, and when it is subsequently assembled into the battery 2000, it is helpful to prevent eccentricity problems of the current collector 100 during the process of being inserted into the case.
  • the second concave portion 27 can also be used as a limiting portion.
  • the current collector 100 can cooperate with the second recess 27 and the limiting member of other components (such as the lower plastic) to limit the position of the current collector 100 . This can reduce the complexity of assembling the battery 2000.
  • the number of the second recessed portions 27 is two, and the two second recessed portions 27 are respectively located on the end sides of the bending portion 22 .
  • the bent portion 22 can follow the two second recessed portions 27 located at both ends of the bent portion 22 .
  • the bending facilitates the bending of the folding component 20 , thereby improving the folding stability of the current collector 100 .
  • the second recessed portion 27 is used as a limiting portion, the two second recessed portions 27 located at both ends of the bent portion 22 can provide a better stable positioning effect on the entire current collector 100 .
  • the bent portion 22 may have both a second recessed portion 27 used for bending the current collector 100 and a second recessed portion 27 used as a limiting portion. That is, the bending portion 22 includes at least two second concave portions 27 , and a part of the second concave portion 27 is used as the second concave portion 27 for bending the current collector 100 , and the bending portion 22 can be bent along this part of the second concave portion 27 .
  • the other part of the second concave part 27 is used as a limiting part, and this part of the second concave part 27 can cooperate with the limiting parts of other components to limit the position of the current collector 100 .
  • the specific functions of the second recessed portions 27 provided on the same side of the bent portion 22 may be different.
  • at least two second recesses 27 are spaced apart on the same side of the bending portion 22 .
  • one or two or more second recesses 27 can be used as bending parts of the current collector 100 , and the remaining one or two or more second recesses 27 can be used as limiting parts. It is used to define the position of the bent current collector 100 by cooperating with the second recess 27 and the limiting members of other components.
  • the bent portion 22 includes three second recessed portions 27 , which are respectively the second recessed portion C1 , the second recessed portion C2 and the second recessed portion C3 .
  • the second recessed portion C1 and the second recessed portion C2 are spaced apart on one side of the bent portion 22
  • the second recessed portion C3 is provided on the other side of the bent portion 22
  • the second recessed portion C2 corresponds to the second recessed portion C3 .
  • the second concave portion C1 is used as a limiting portion, and the position of the bent current collector 100 is limited by the second concave portion C1 cooperating with the limiting members of other components.
  • the second concave portion C2 and the second concave portion C3 are used for bending the current collector 100.
  • the bending portion 22 can be bent along the second concave portion C2 and the second concave portion C3, which is beneficial to the bending of the folding assembly 20, so that the current collector 100 can be bent. Better folding stability.
  • the two second recesses 27 spaced apart along the same side of the bending portion 22 have different shapes and/or sizes. Since the two second recesses 27 spaced apart on the same side have different shapes and/or sizes, even if the two second recesses 27 with different functions are provided on the same side of the bending portion 22, the second recesses 27 can be easily adjusted according to the shape and/or size of the second recesses 27. The shape and/or size of the second recess 27 differentiates the two second recesses 27 with different specific functions.
  • the size of the second concave portion 27 can be set relatively small; when the corresponding second concave portion 27 is used as the current collector 100 in a bent manner, the size of the second concave portion 27 can be set relatively small.
  • the size can be set relatively large.
  • the second concave portions 27 with different specific functions can also be provided on different sides of the bending portion 22 .
  • the bent portion 22 includes a connected first end side 2201 and a second end side 2202.
  • the first end side 2201 has at least one second recess 27, and the second end side 2201 has at least one second recess 27.
  • 2202 has at least one second recess 27 .
  • the second recesses 27 located on different end sides can play different functions to avoid mutual interference.
  • the bending portion 22 includes two second concave portions 27 , which are the second concave portion C1 and the second concave portion C2 respectively.
  • the second recessed portion C1 is located at the first end side 2201 of the bent portion 22 and is used for bending the current collector 100;
  • the second recessed portion C2 is located at the second end side 2202 of the bent portion 22 and is used as a limiting portion. That is, the bending portion 22 can be bent along the second concave portion C1, and the position of the bent current collector 100 is limited by the second concave portion C2 and the limiting member of other components.
  • the bending portion 22 includes at least parts of at least two stacked folding parts 21
  • the second recess 27 includes at least one second sub-recess 271
  • the at least one folding part 21 has At least one second sub-recess 271 is located on the end side of the folding part 21 .
  • the stability of the current collector 100 is better, and the bent current collector 100 is not easy to wrinkle, which is conducive to the flow conduction of the current collector 100.
  • the second recessed portion 27 is used as a limiting portion, since the second recessed portion 27 includes at least one second sub-recessed portion 271 and at least one folding member 21 has at least one second sub-recessed portion 271, the second recessed portion 27 and other recessed portions can be reduced. Difficulty of limited fit of components.
  • the at least two folding parts 21 include a third folding part 21 and a fourth folding part 21 , the third folding part 21 and the fourth folding part 21 are stacked, and the third folding part 21 has a second sub-recess 271 , the fourth folding part 21 has a second sub-recess 271, and the second sub-recess 271 of the third folding part 21 and the second sub-recess 271 of the fourth folding part 21 are stacked.
  • the second sub-recess 271 of the third folding part 21 and the second sub-recess 271 of the fourth folding part 21 are stacked, in this way, in the second recess 27
  • the folding stability of the current collector 100 can be better, and the current collector 100 can be ensured to have a better flow guiding effect;
  • the stacking can improve the stability of the second recessed portion 27 and the limiting member of other components (such as the lower plastic) when engaging in limiting engagement.
  • the number of folding parts 21 is multiple.
  • Each folding part 21 has a second sub-recess 271 , and the plurality of second sub-recesses are located on the same side of the bending part 22 . 271 cascade settings.
  • multiple folding members 21 are stacked, multiple second sub-recesses 271 located on the same side of different folding members 21 are stacked. In this way, when the second recess 27 is bent and used as the current collector 100, the current collector 100 can be bent.
  • the folding stability is better and can ensure that the current collector 100 has a better flow guiding effect; when the second concave portion 27 is used as a limiting portion, it can reduce the difficulty of the second concave portion 27 and other components in limiting the fit. Furthermore, the structural stability of the second recessed portion 27 and other components is improved.
  • FIG. 8 is an exploded schematic view of the folding assembly 20
  • FIG. 5 is a schematic view of a plurality of folding parts 21 stacked.
  • the folding assembly 20 includes a folding piece a1, a folding piece a2, a folding piece a3, a folding piece a4 and a folding piece a5.
  • the folding parts a1, a2, a3, a4 and a5 all include a sub-bending part 221 and a sub-connecting part 231, and the sub-bending part 221 of each folding part 21 includes a second sub-recessed part. c1, the second sub-recessed part c2 and the second sub-recessed part c3.
  • p For each folded piece 21, p.
  • the second sub-recessed part c1 and the second sub-recessed part c2 are provided on the same side of the folding part 21, the second recessed part C3 is located on the other side of the folding part 21, and the second recessed part C3 corresponds to the second sub-recessed part c2.
  • the folding parts a1 , a2 , a3 , a4 and a5 are stacked, the sub-bending parts 221 of the plurality of folding parts 21 are stacked to form the bending part 22 .
  • the second sub-recesses c1 of the folding parts a1, a2, a3, a4 and a5 are stacked to form the second recess C1; the folding parts a1, a2, a3, a4 and The second sub-recessed portions 271 of the folding piece a5 are stacked d2 to form the second recessed portion C2; the second sub-recessed portions 271 of the folding piece a1, the folding piece a2, the folding piece a3, the folding piece a4 and the folding piece a5 are stacked d3 to form the second recessed portion C2. 2. Concave C3.
  • the bent portion 22 can be bent along the second recessed portion C2 and the second recessed portion C3, and the second recessed portion C1 is used as a limiting portion.
  • the position of the bent current collector 100 is limited by cooperating with the second concave portion C1 and the limiting member of other components.
  • At least one folding member 21 has a second sub-recess 271 at both ends, and the two second sub-recesses 271 of the folding member 21 are symmetrically arranged. In this way, when the second recess 27 is used as the current collector 100 for bending, it is helpful for the folding assembly 20 to bend, thereby making the folding stability of the current collector 100 better.
  • the second sub-recess 271 may be an arc-shaped groove.
  • the folding stability of the current collector 100 can be improved, and the current collector 100 can be prevented from interfering with itself or other components when folded; in the second recessed portion
  • 27 when 27 is used as a limiting portion, it can reduce the difficulty of the limiting fit between the second concave portion 27 and other components, and can also improve the structural stability of the fit between the second concave portion 27 and other components.
  • the bending part 22 includes a first bending part 223 , a second bending part 222 and a second folding part 28 .
  • the second folding part 28 is located on the first bending part 223 Between the second folding portion 222 and the second folding portion 28, the second recessed portion 27 is connected.
  • the first bending portion 223 can be bent along the second folding portion 28 relative to the second bending portion 222. Since the second fold portion 28 is connected to the second recessed portion 27, when the first bend portion 223 is bent along the second fold portion 28 relative to the second bend portion 222, the folding stability of the current collector 100 can be improved, and the folding stability of the current collector 100 can be improved. This can prevent the current collector 100 from being easily dislocated when it is bent.
  • the number of the second recessed portions 27 is two.
  • the two second recessed portions 27 are respectively located at both ends of the second folded portion 28 .
  • the second folded portion 28 connects the two second recessed portions 27 . Since the second folded portion 28 connects the two second recessed portions 27 , that is, both ends of the second folded portion 28 have the second recessed portion 27 , so compared with only one end of the second folded portion 28 having the second recessed portion 27 , when the first bending portion 223 is bent relative to the second bending portion 222 along the second fold portion 28, the stability of the folding of the current collector 100 can be further improved, and the current collector 100 can also be less likely to be dislocated when bent. .
  • the second fold portion 28 is composed of at least two folded parts 21 arranged in a stack
  • the first bending part 223 includes at least two folded parts 21 arranged in a stack
  • the second bending portion 222 includes portions of at least two folding pieces 21 arranged in a stack. This facilitates the first bending portion 223 to be bent relative to the second bending portion 222 along the second fold portion 28 .
  • the second fold portion 28 includes at least portions of at least two stacked folding pieces 21 , the second fold portion 28 includes two or more second sub-fold portions 281 , and at least one The folding piece 21 has a second sub-fold portion 281, and two or more second sub-fold portions 281 are stacked. Since at least one folding part 21 has a second sub-folding part 281 and the second sub-folding parts 281 on different folding parts 21 are stacked, the first bending part 223 faces each other along the second folding part 28 When the second bending portion 222 is bent, the folding stability of the current collector 100 can be improved, and the current collector 100 can also be less likely to be dislocated when bent, so that the current collector 100 can be bent with higher accuracy.
  • FIG. 8 is an exploded schematic view of the folding assembly 20
  • FIG. 5 is a schematic view of a plurality of folding parts 21 stacked.
  • the folding assembly 20 includes five folding parts 21.
  • Each folding part 21 includes a first sub-bending part 2231, a second sub-bending part 2221 and a second sub-folding part 281, wherein the second sub-folding part 281 is located at the third sub-folding part 2231.
  • the first sub-bending portion 2231 can be bent relative to the second sub-bending portion 2221 along the second sub-folding portion 281 .
  • the second sub-fold portion 281 of each folding piece 21 is stacked to form the second folding portion 28 .
  • the second folding part 28 when the first bending part 223 and the second bending part 222 are in a flattened state, the second folding part 28 is concave relative to the first bending part 223 .
  • the second crease portion 28 is concave relative to the second bending portion 222 . This facilitates the first bending portion 223 to be bent relative to the second bending portion 222 along the second fold portion 28 .
  • the first bending portion 223 after being bent along the second folding portion 28 has a gap. Since the first bending portion 223 after being bent along the second folding portion 28 has a gap, a buffer space can be reserved for the bent folding member 21 , thereby avoiding vibration fatigue of the current collector 100 during the vibration process. , the problem of breakage occurs, thereby prolonging the service life of the current collector 100 .
  • the folding assembly 20 when the folding assembly 20 is bent, there may also be a gap between at least two adjacent folding parts 21 . This can also reserve a buffer space for the folded member 21 after bending, thereby preventing the current collector 100 from vibrating, especially When vibration fatigue occurs, the problem of fracture occurs, thereby extending the service life of the current collector 100 .
  • the body 10 has at least one through hole 11 penetrating the body 10 . Since at least one through hole 11 is opened in the body 10, it is beneficial to the circulation of the electrolyte and/or to reduce the local thickness of the body 10.
  • At least one through hole 11 includes at least one first through hole 111 .
  • the orthographic projection of the folding component 20 on the body 10 covers at least part of the first through hole 111 .
  • the electrolyte in the battery 2000 can flow through the first through hole 111 , which is beneficial to evenly distributing the electrolyte in the battery 2000 .
  • the above "under the condition that at least part of the folding component 20 is bent relative to the body 10" can be understood in conjunction with FIG. 3 .
  • the orthographic projection of the bent folding assembly 20 on the body 10 covers at least the first through hole 111. part. That is, the above-mentioned “under the condition that at least part of the folding assembly 20 is bent relative to the body 10" can be understood as the structural condition of the current collector 100 when it is installed in the battery 2000 and used as a conductive member.
  • At least one through hole 11 may also include at least one second through hole 112 .
  • the folding component 20 Under the condition that at least part of the folding component 20 is bent relative to the body 10 , the folding component 20 The area covered by the orthographic projection of the second through hole 112 on the body 10 is zero. That is, under the condition that at least part of the folding component 20 is bent relative to the body 10 , the orthographic projection of the folding component 20 on the body 10 cannot cover the second through hole 112 .
  • the above "under the condition that at least part of the folding component 20 is bent relative to the body 10" can be understood in conjunction with FIG. 3 .
  • the orthographic projection of the bent folding assembly 20 on the body 10 covers the area of the second through hole 112. is zero. That is, the above-mentioned “under the condition that at least part of the folding assembly 20 is bent relative to the body 10" can be understood as the state after the current collector 100 is installed in the battery 2000.
  • bent folding assembly 20 can be understood as features that the current collector 100 can have after being installed in the battery 2000 . Therefore, no further details will be given on this.
  • the body 10 is provided with the second through hole 112 , this is beneficial to reducing the local thickness of the body 10 , thereby reducing the quality of the current collector 100 ; on the other hand, since at least part of the folding assembly 20 is bent relative to the body 10 Under the folded condition, the area of the second through hole 112 covered by the orthographic projection of the folded component 20 on the body 10 is zero, and the electrolyte in the battery 2000 cannot flow through the second through hole 112, thereby avoiding affecting the normal operation of the battery 2000.
  • At least one second through hole 112 is located on the same side of the bent folding component 20 . Since the body 10 is provided with the second through hole 112 , this is beneficial to reducing the local thickness of the body 10 , thereby reducing the quality of the current collector 100 .
  • the number of second through holes 112 is two or more, and any two second through holes 112 are spaced apart. Since the body 10 is provided with the second through hole 112 , this is beneficial to reducing the local thickness of the body 10 , thereby reducing the quality of the current collector 100 .
  • the number of the second through holes 112 is two or more, and the distance between at least two spaced apart second through holes 112 is smaller than the width of the folding member 21 .
  • the number of the second through holes 112 is two or more, and the connecting line between the shortest distance of any two adjacent second through holes 112 is located on the bent folding assembly. 20 is outside the orthographic projection on the body 10.
  • the number of the second through holes 112 is two or more, and at least part of the connection line between the shortest distance of any two adjacent second through holes 112 is formed by bending the folded Orthographic overlay of component 20 on body 10 .
  • the second through hole 112 is circular, which is convenient for processing.
  • the second through hole 112 can also be in other shapes, such as triangle, rectangle, rhombus, hexagon, etc., which are not limited here.
  • one end of the bent portion 22 away from the connecting portion 23 has a channel 30.
  • the channel 30 is configured to connect the pole 200 (as shown in Figure 12). At least part of the pole 200 is located In the channel 30 , the channel 30 is located in the middle of the end of the bent portion 22 away from the connecting portion 23 . Since the channel 30 is disposed in the middle of the bent portion 22 , when the bent portion 22 is connected to the pole 200 through the channel 30 , the stability of the connection between the pole 200 and the bent portion 22 can be effectively increased.
  • the bending portion 22 includes at least part of at least two stacked folding parts 21, each folding part 21 is provided with a third through hole 31, and at least two The third through holes 31 are stacked to form the channel 30 . Since each folding member 21 is provided with a third through hole 31 , the pole 200 passes through the entire folding assembly 20 , thereby enhancing the stability of the connection between the current collector 100 and the pole 200 .
  • FIG. 11 is an exploded schematic view of the folding assembly 20
  • FIG. 10 is a schematic view of multiple folding parts 21 stacked. picture.
  • the folding assembly 20 includes five folding parts 21.
  • Each folding part 21 includes a sub-bending part 221 and a sub-connecting part 231, and the end of the sub-bending part 221 of each folding part 21 away from the sub-connecting part 231 is provided with a third Tee hole 31.
  • a plurality of sub-bending portions 221 are stacked to form the bending portion 22
  • a plurality of third through holes 31 are stacked to form the channel 30 .
  • one end of the bent portion 22 away from the connecting portion 23 has two channels 30.
  • the channels 30 are configured to connect the poles 200. At least part of the poles 200 is located in the channels 30. Two channels 30 are provided. Channel 30 interval setting. In this way, the current collector 100 can be connected to the two poles 200 at the same time, thereby making the connection between the current collector 100 and the battery 2000 more stable.
  • the bent portion 22 includes a first end 2203 and a second end 2204.
  • the first end 2203 is the end of the bent portion 22 away from the connecting portion 23, and the second end 2204 is relative to the first end 2203.
  • the width of the first end 2203 is greater than the width of the second end 2204
  • the first end 2203 has two channels 30 .
  • the width of the first end 2203 is greater than the width of the second end 2204, this can ensure the normal flow capacity of the current collector 100; on the other hand, because the two channels 30 are provided, the current collector 100 can be connected to two channels at the same time.
  • the poles 200 are connected, thereby making the connection between the current collector 100 and the battery 2000 more stable.
  • the distance between the edges of the two channels 30 is less than the width of the second end 2204 .
  • the edges of the two channels 30 both include part of the structure of the current collector 100 , ensuring the stability of the connection between the current collector 100 and the pole 200 .
  • the recessed portion 40 includes a third recessed portion 29
  • the bent portion 22 has at least one third recessed portion 29
  • the at least one third recessed portion 29 is located at an end side of the bent portion 22
  • the third recessed portion 29 Located between the first end 2203 and the second end 2204 , the bending portion 22 can be bent along the third recess 29 .
  • This can facilitate the folding of the folding component 20 , that is, the folding of the current collector 100 .
  • it can also ensure that the current collector 100 is folded in a specified direction, and when it is subsequently assembled into the battery 2000, it is helpful to prevent eccentricity problems of the current collector 100 during the process of being inserted into the case.
  • the thicknesses of the plurality of folding pieces 21 in the folding assembly 20 may not be exactly the same.
  • the at least two folding parts 21 include a fifth folding part 21 and a sixth folding part 21 , and the thickness of the fifth folding part 21 is smaller than the thickness of the sixth folding part 21 . Due to the different thickness settings of the folding component 21, the overall structural strength of the folding component 20 can be ensured, the bending of the folding component 20 can be facilitated, and the overcurrent capability of the folding component 20 as a conductive component can be ensured. Moreover, this can be matched according to the design of other components of the battery 2000 (such as the lower plastic or the form of the tabs or the structure of the pole), so as to increase the installation space of the current collector 100.
  • the number of fifth folding parts 21 is at least two, and at least two fifth folding parts 21 are arranged in a stack. In this way, the overall structural strength of the folding assembly 20 can be ensured, and the folding member 21 of the folding assembly 20 can be prevented from breaking during the vibration process, especially when vibration fatigue occurs, and the bending of the folding assembly 20 can be facilitated while ensuring that the folding assembly 20 20 as the overcurrent capacity of conductive parts. Moreover, it should be noted that in technical verification tests, it was found that even if one or both of the fifth folded parts 21 break, the current collector 100 as a conductive adapter can still achieve normal overcurrent.
  • the sixth folding part 21 is located on the at least two stacked parts. Five folds 21 on one side. Since the thicker sixth folding member 21 is provided on one side of at least two fifth folding members 21 , the overall structural strength of the folding assembly 20 can be ensured.
  • the thickness of the fifth folding part 21 is 5% to 95% of the thickness of the sixth folding part 21 .
  • the thickness of the fifth folding part 21 and the sixth folding part 21 can be set according to the specific application environment. Moreover, this can be matched according to the design of other components of the battery 2000 (such as the lower plastic or the form of the tabs or the structure of the pole), so as to increase the installation space of the current collector 100.
  • the thickness of the fifth folding part 21 is 8% to 50% of the thickness of the sixth folding part 21 .
  • the overall structural strength of the folding assembly 20 can be ensured, and the folding member 21 of the folding assembly 20 can be prevented from breaking during vibration, especially vibration fatigue, and it can also facilitate the bending of the folding assembly 20 while ensuring that The folded component 20 serves as a conductive component for overcurrent capability.
  • the thickness of the sixth folding member 21 is relatively thick, the number of layers of the folding members 21 installed in the folding assembly 20 can be relatively small, thereby reducing the installation space occupied by the current collector 100 in the battery 2000 and reducing the current collector 100 manufacturing costs.
  • the folding component 20 is less likely to wrinkle when bent.
  • the thickness of the fifth folding part 21 is 45% to 95% of the thickness of the sixth folding part 21 .
  • the overall structural strength of the folding assembly 20 can be ensured, and the folding member 21 of the folding assembly 20 can be prevented from breaking during the vibration process, especially during vibration fatigue, and it can also facilitate the bending of the folding assembly 20 and ensure the folding at the same time.
  • Component 20 serves as a conductive component for overcurrent capability.
  • the thickness of the fifth folding member 21 and the sixth folding member 21 is similar, the overall structure of the folding assembly 20 is more consistent, and the flow is more balanced.
  • each folding member 21 can be configured to be thinner, with better overall flexibility and better overall bending effect.
  • the thickness of each fold 21 is in the range [0.05mm, 0.3mm].
  • the thickness of the folding member 21 may be 0.05mm, 0.06mm, 0.08mm, 0.12mm, 0.16mm, 0.18mm, 0.23mm, 0.25mm, 0.28mm, 0.30mm, etc.
  • the thickness of the folding part 21 is less than 0.05 mm, then the folding assembly 20 formed by stacking a certain number of folding parts 21 together will suffer from vibration during vibration, especially vibration fatigue.
  • the thickness of the folding part 21 is too thick, for example, the thickness of the folding part 21 is greater than 0.3mm, it will not be easy to fold the folding part 21, and it will also increase the overall thickness of the current collector 100, which is not conducive to reducing the battery 2000. Volume and mass. Therefore, in this embodiment, since the thickness of each folded member 21 is within the range of [0.05mm, 0.3mm], this not only solves the problem that the current collector 100 is easily broken during vibration fatigue, but also does not affect the strength of the current collector 100 Fold normally.
  • the body 10 has an escape notch 12 on the side away from the current collector 100 , and the escape notch 12 penetrates part of the edge of the body 10 . Since the avoidance notch 12 is provided on the edge of the body 10, the avoidance notch 12 can be used to avoid the explosion-proof valve.
  • embodiments of the present application also provide an end cap assembly 1000 for the battery 2000 .
  • the end cap assembly 1000 includes a cover plate 300 and the current collector 100 described in any of the above embodiments.
  • the current collector 100 is connected to the cover plate 300 .
  • the foldable folding assembly 20 in the current collector 100 by configuring the foldable folding assembly 20 in the current collector 100 into a multi-layer structure, it is beneficial to increase the rigidity of the folding assembly 20 and reduce the possibility of the folding assembly 20 breaking, thus solving the problem.
  • the current collector 100 is easily broken due to vibration fatigue, so as to extend the service life of the end cap assembly 1000 .
  • the embodiment of the present application further provides a battery 2000.
  • the battery 2000 includes a bare cell 400, a casing 500, and the end cover assembly 1000 described in any of the above embodiments. At least part of the bare cell 400 is accommodated in the casing 500, and the end cover assembly 1000 is connected to the bare cell 400.
  • the foldable folding component 20 in the current collector 100 by configuring the foldable folding component 20 in the current collector 100 into a multi-layer structure, it is beneficial to increase the rigidity of the folding component 20 and reduce the possibility of breakage of the folding component 20, thus solving the current collector problem. 100 is prone to breakage during vibration fatigue in order to extend the service life of the battery 2000.
  • the housing 500 is in the shape of a cylinder.
  • the direction parallel to the center line of the cylinder is defined as the first direction D1 .
  • the bent folding component 20 is in the first direction D1 At least part of the orthographic projection falls on the body 10 . Since at least part of the orthographic projection of the bent folding component 20 in the first direction D1 falls on the body 10 , this is helpful in preventing eccentricity problems.
  • At least part of the orthographic projection of the folded component 20 in the first direction D1 falls on the bare cell 400 . Since at least part of the orthographic projection of the bent folding component 20 in the first direction D1 falls on the bare battery core 400 , this is beneficial to the cooperation between the current collector 100 and the bare battery core 400 .
  • the bare battery core 400 includes tabs 401 , the tabs 401 are configured to be connected to the body 10 , and at least part of the orthographic projection of the bent folding component 20 in the first direction D1 falls on the tabs 401 superior. Since at least part of the orthographic projection of the bent folding component 20 in the first direction D1 falls on the tab 401 , this is beneficial to the cooperation between the current collector 100 and the bare battery core 400 .
  • the embodiment of the present application also provides a battery pack 4000.
  • the battery pack 4000 includes a battery box 3000 and the battery 2000 described in any of the above embodiments. At least part of the battery 2000 contains in the battery box 3000.
  • the foldable folding component 20 of the current collector 100 in the battery 2000 into a multi-layer structure, it is beneficial to increase the rigidity of the folding component 20 and reduce the possibility of breakage of the folding component 20. This solves the problem that the current collector 100 is easily broken during vibration fatigue, thereby extending the service life of the battery 2000.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features.
  • features defined as “first” and “second” may explicitly or implicitly include at least one of the described features.
  • “plurality” means at least two, such as two or three, unless otherwise expressly and specifically limited.

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Abstract

一种集流体(100)、端盖组件(1000)、电池(2000)及电池包(4000)。集流体(100)包括本体(10)及折叠组件(20)，折叠组件(20)的至少部分能够相对于本体(10)弯折，折叠组件(20)包括至少两个层叠的折叠件(21)，折叠件(21)上设置有至少一个凹部(40)。

Description

集流体、电池及电池包
优先权信息
本申请请求2022年07月21日向中国国家知识产权局提交的、专利申请号为202221913795.1的专利申请的优先权和权益，并且通过参照将其全文并入此处。
技术领域
本申请涉及电池技术领域，更具体而言，涉及一种集流体、电池及电池包。
背景技术
随着社会的发展，环境污染的加剧和传统能源的日益枯竭，人们对环保的意识越来越强。锂离子电池以其高能量密度、高电压、低放电率、和长循环寿命等优点成为绿色能源的首选，因而广泛用于蓝牙耳机、手机、数码、平板电脑等便携设备，以及电动汽车、储能电站等大型设备。
相比较下，圆柱电池的盖板组件装配时，需要对集流体进行折叠。然而，集流体在振动过程中尤其是振动疲劳时，折叠部分很容易出现断裂的问题。
发明内容
本申请实施方式提供一种集流体、电池及电池包。
本申请实施方式中的集流体包括本体及折叠组件。所述折叠组件的至少部分能够相对于所述本体弯折，所述折叠组件包括至少两个层叠的折叠件，所述折叠件上设置至少一个凹部，
所述折叠组件包括弯折部和连接部，所述弯折部通过所述连接部连接所述本体，所述弯折部能够相对于所述连接部弯折。
所述连接部的至少部分固定连接于所述本体的一侧。
在某些实施方式中，弯折后的所述弯折部在所述本体上的正投影面积大于所述连接部在所述本体上的正投影面积。
如此，弯折后的弯折部在本体上的正投影的面积更大，保证集流体的过流能力。另外，连接部在本体上的正投影的面积相对小，这样和本体焊接时占用本体的面积较小，继而可以保证本体预留有充足的设置空间去焊接极耳，继而保证集流体的过流能力。
在某些实施方式中，弯折后的所述弯折部在所述本体上的正投影覆盖所述连接部的至少部分。
如此，弯折后的弯折部的主体部分位于本体的正上方，有利于防止集流体在入壳的过程中出现偏心问题。
在某些实施方式中，所述连接部的厚度大于所述本体的厚度。
如此，连接部的厚度大于本体的厚度，如此内容能够个保证连接部和本体连接的结构强度。
在某些实施方式中，所述凹部包括第一凹部，所述连接处包括至少两个层叠的所述折叠件的至少部分，所述第一凹部包括至少一个第一子凹部，至少一个所述折叠件具有所述第一子凹部，所述第一子凹部位于所述折叠件的端侧。所述连接处包括第一折痕部，所述第一折痕部连接所述第一凹部，所述弯折部能够沿所述第一折痕部相对于所述连接部弯折。所述第一折痕部包括至少两个层叠的所述折叠件的至少部分，所述第一折痕部包括两个或多个第一子折痕部，至少一个所述折叠件具有所述第一子折痕部，所述两个或多个第一子折痕部层叠设置。
在第一凹部作为集流体弯折使用时，这样设置使集流体折叠的稳定性更佳，并使集流体弯折时不容易错位，使集流体弯折时的准确度更高。
在某些实施方式中，所述凹部包括第二凹部，所述弯折部具有至少一个第二凹部，至少一个所述第二凹部位于所述弯折部的端侧。所述弯折部包括至少两个层叠的所述折叠件的至少部分，所述第二凹部包括至少一个第二子凹部，至少一个所述折叠件具有至少一个所述第二子凹部，所述第二子凹部位于所述折叠件的端侧。
如此，弯折部能够沿第二凹部弯折，有利于折叠件折叠，也即有利于集流体折叠。此外，还能够保证集流体按照指定方向折叠，并且在后续组装成电池时，有利于防止集流体在入壳的过程中出现偏心问 题。另外，第二凹部也可作为限位部使用。集流体可以通过第二凹部和其他部件(例如下塑胶)的限位件进行配合，以限定集流体的位置。在第二凹部作为集流体弯折使用时，这样设置使集流体折叠的稳定性更佳，并且使得弯折的集流体也不容易起皱褶，利于集流体导流。在第二凹部作为限位部使用时，这样设置的第二凹部和其他部件容易进行限位配合。
在某些实施方式中，至少两个所述第二凹部间隔设置于所述弯折部的同一侧，并且沿所述弯折部的同一侧间隔设置的两个所述第二凹部的形状和/或尺寸相同或不同，或者，所述弯折部包括连接的第一端侧和第二端侧，所述第一端侧具有至少一个所述第二凹部，所述第二端侧具有至少一个所述第二凹部。
如此，在第二凹部作为集流体弯折使用时，这样设置使集流体折叠的稳定性较佳，也可以根据第二凹部的具体作用将第二凹部设置成不同形状或不同尺寸，位于不同端侧的第二凹部可以起到不用的功能作用，以避免相互干涉。
在某些实施方式中，所述弯折部包括第一弯折部、第二弯折部和第二折痕部，所述第二折痕部位于所述第一弯折部和所述第二弯折部之间，所述第二折痕部连接所述第二凹部，所述第一弯折部能够沿所述第二折痕部相对于所述第二弯折部弯折，在所述第一弯折部和所述第二弯折部处于展平状态的条件下，所述第二折痕部相对于所述第一弯折部下凹，所述第二折痕部相对于所述第二弯折部下凹，所述第二折痕部由层叠设置的所述至少两个折叠件的部分构成，所述第一弯折部包括所述层叠设置的所述至少两个折叠件的部分，所述第二弯折部包括所述层叠设置的所述至少两个折叠件的部分。所述第二凹部的数目为两个，两个所述第二凹部分别位于所述第二折痕部的两端，所述第二折痕部连接两个所述第二凹部。所述第二折痕部包括两个或多个第二子折痕部，至少一个所述折叠件具有所述第二子折痕部，所述两个或多个第二子折痕部层叠设置。
如此第二折痕部连接第二凹部，在第一弯折部沿第二折痕部相对于第二弯折部弯折时，能够提升集流体折叠的稳定性，还能够使集流体弯折时不容易错位。如此有利于第一弯折部沿第二折痕部相对于第二弯折部弯折，也有利于第一弯折部沿第二折痕部相对于第二弯折部弯折，第二折痕部连接两个第二凹部，即第二折痕部的两端均具有第二凹部，如此相较于仅第二折痕部的一端具有第二凹部，第一弯折部沿第二折痕部相对于第二弯折部弯折时，能够进一步地提升集流体折叠的稳定性，还能够使集流体弯折时不容易错位。至少一个折叠件上具有第二子折痕部，且位于不同折叠件上的第二子折痕部层叠设置，如此在第一弯折部沿第二折痕部相对于第二弯折部弯折时，能够提升集流体折叠的稳定性，还能够使集流体弯折时不容易错位，使集流体弯折时的准确度更高。
在某些实施方式中，在所述折叠组件弯折的条件下，至少两个相邻的折叠件之间具有间隙。
如此能够给弯折后的折叠件预留缓冲空间，从而能够避免集流体在振动的过程中尤其是振动疲劳时，出现断裂的问题，从而延长集流体的使用寿命。
在某些实施方式中，至少一个所述折叠件的长度大于所述本体的任意两点之间的距离。
如此能够进行较大程度的弯折，集流体缓冲振动的作用能够得到加强。
在某些实施方式中，相邻的两个弯折后的所述折叠件在所述本体上的正投影至少部分重叠。
如此有利于防止集流体在入壳过程中出现偏心问题。
在某些实施方式中，所述本体具有贯穿所述本体的至少一个通孔。所述至少一个通孔包括至少一个第一通孔或者至少一个第二通孔，在所述折叠组件的至少部分相对于所述本体弯折的条件下，所述折叠组件在所述本体上的正投影覆盖所述第一通孔的至少部分。所述折叠组件在所述本体上的正投影覆盖所述第二通孔的面积为零。
如此，在本体上开设至少一个通孔，有利于电解液流通和/或有利于降低本体局部厚度。电池中的电解液能够通过第一通孔流通，从而有利于使电解液能够在电池内均匀分布。由于本体开设有第二通孔，如此有利于减小本体的局部厚度，从而降低集流体的质量。
在某些实施方式中，在所述折叠组件的至少部分相对于所述本体弯折的条件下，所述至少一个第二通孔位于弯折后的所述折叠组件的同一侧。
由于本体开设有第二通孔，如此有利于减小本体的局部厚度，从而降低集流体的质量。
在某些实施方式中，所述第二通孔的数目为两个及以上，至少两个所述第二通孔间隔设置，间隔设置的两个所述第二通孔之间的间距小于所述折叠件的宽度。或者，任意两个所述第二通孔间隔设置。或者，任意相邻的两个所述第二通孔的最短距离之间的连接线位于弯折后的所述折叠组件在所述本体上的 正投影外。或者，任意相邻的两个所述第二通孔的最短距离之间的连接线的至少部分由弯折后的所述折叠组件在所述本体上的正投影覆盖。
由于本体开设有第二通孔，如此有利于减小本体的局部厚度，从而降低集流体的质量。
在某些实施方式中，所述弯折部包括第一端和第二端，所述第一端为所述弯折部远离所述连接部的一端，所述第二端相对于所述第一端靠近所述连接部，所述第一端具有位于第一端的中部的一个通道或间隔设置的两个通道，所述通道被配置为连接极柱，极柱的至少部分位于所述通道内，所述弯折部包括至少两个层叠的所述折叠件的至少部分，每个所述折叠件开设有第三通孔，至少两个所述第三通孔层叠设置以形成所述通道。
如此，通道设置在弯折部的中部，当弯折部通过通道连接极柱时，可有效增加极柱与弯折部之间连接的稳定性。由于每个折叠件均开设有第三通孔，使得极柱穿设整个折叠组件，加强集流体与极柱之间连接的稳定性。如此能够使集流体同时与两个极柱连接，从而能够使得集流体与电池之间的连接的稳定性更佳。由于设置两个通道，能够使集流体同时与两个极柱连接，从而能够使得集流体与电池之间的连接稳定性更佳。
在某些实施方式中，所述第一端的宽度大于所述第二端的宽度。
由于第一端的宽度大于第二端的宽度，如此能够保证集流体的正常过流能力。
在某些实施方式中，两个所述通道的边缘之间的距离小于所述第二端的宽度。
如此，使得两个通道的边缘均包括部分集流体的结构，保证集流体与极柱之间的连接的稳定性。
在某些实施方式中，所述凹部包括第三凹部，所述弯折部具有至少一个第三凹部，至少一个所述第三凹部位于所述弯折部的端侧，或者，所述第三凹部位于所述第一端和所述第二端之间，所述弯折部能够沿所述第三凹部弯折。
如此能够有利于折叠组件折叠，也即有利于集流体折叠。此外，还能够保证集流体按照指定方向折叠，并且在后续组装成电池时，有利于防止集流体在入壳的过程中出现偏心问题。
在某些实施方式中，所述至少两个折叠件的厚度不同。
由于折叠件的厚度设置的不同，既可以保证折叠组件整体的结构强度，也便于折叠组件的弯折，同时保证折叠组件作为导电件的过流能力。并且，这样可以根据电池其他部件(例如下塑胶或极耳的形式或极柱的结构)的设计情况进行对应匹配，以提高集流体的可设置空间。
在某些实施方式中，每个所述折叠件的厚度在[0.05mm，0.3mm]范围内。
每个折叠件的厚度在[0.05mm，0.3mm]范围内，如此不仅能够解决集流体在振动疲劳时易断裂的问题，还不影响集流体的正常折叠。
在某些实施方式中，所述本体远离所述折叠组件的一侧具有避让缺口，所述避让缺口贯通所述本体的部分边缘。
由于本体边缘设有避让缺口，避让缺口能够用于避让防爆阀。
本申请实施方式中的电池包括裸电芯、外壳及端盖组件，所述裸电芯的至少部分容纳于所述外壳内，所述端盖组件与所述裸电芯连接，端盖组件包括盖板及上述任意一实施方式所述的集流体，所述盖板与所述集流体连接。
在本申请的电池中，通过将集流体中的可折叠的折叠组件设置为多层结构，如此有利于增加折叠组件的刚性，降低折叠组件断裂的可能性，从而解决集流体在振动疲劳时易断裂的问题，以延长电池的使用寿命。
在某些实施方式中，所述外壳呈圆柱体状，定义平行于所述圆柱体的中心线的方向为第一方向，弯折后的所述折叠组件在所述第一方向上的正投影的至少部分落在所述集流体的所述本体或所述裸电芯上。
由于弯折后的折叠组件在第一方向上的正投影的至少部分落在本体上，如此有利于防止出现偏心问题。由于弯折后的折叠组件在第一方向上的正投影的至少部分落在裸电芯上，如此有利于集流体与裸电芯的配合。
本申请实施方式中的电池包包括电池箱及上述任意一项实施方式中所述的电池。电池的至少部分收容于电池箱内。
在本申请的电池包中，通过将电池的集流体中的可折叠的折叠组件设置为多层结构，如此有利于增 加折叠组件的刚性，降低折叠组件断裂的可能性，从而解决集流体在振动疲劳时易断裂的问题，以延长电池的使用寿命。
本申请的实施方式的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实施方式的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1是本申请某些实施方式中集流体的立体结构示意图；
图2是本申请某些实施方式中集流体的立体分解示意图；
图3是本申请某些实施方式中集流体弯折后的立体结构示意图；
图4是本申请某些实施方式中集流体弯折后弯折部及连接部在本体上的正投影的示意图；
图5本申请某些实施方式中集流体中折叠件的立体结构示意图；
图6本申请某些实施方式中集流体中折叠件的立体分解示意图；
图7本申请某些实施方式中集流体中折叠件的立体结构示意图；
图8本申请某些实施方式中集流体中折叠件的立体分解示意图；
图9及图10是本申请某些实施方式中集流体的立体结构示意图；
图11是本申请某些实施方式中集流体的立体分解示意图；
图12是本申请某些实施方式中集流体及极柱的立体结构示意图；
图13是本申请某些实施方式中电池的结构示意图；
图14是本申请某些实施方式中电池的立体结构示意图；
图15是本申请某些实施方式中电池包的结构示意图。
主要元件符号说明：
集流体100
本体10、通孔11、第一通孔111、第二通孔112、避让缺口12；
折叠组件20、折叠件21、弯折部22、子弯折部221、第一弯折部223、第一子弯折部2231、第二弯折部222、第二子弯折部2221、第一端侧2201、第二端侧2202、第一端2203、第二端2204、连接部23、子连接部231、凹部40、第一凹部25、第一子凹部251、第一折痕部26、第一子折痕部261、第二凹部27、第二子凹部271、第二折痕部28、第二子折痕部281、第三凹部29、通道30、第三通孔3；
端盖组件1000、盖板300；
电池2000、极柱200、裸电芯400、极耳401、外壳500。
具体实施方式
以下结合附图对本申请的实施方式作进一步说明。附图中相同或类似的标号自始至终表示相同或类似的元件或具有相同或类似功能的元件。
另外，下面结合附图描述的本申请的实施方式是示例性的，仅用于解释本申请的实施方式，而不能理解为对本申请的限制。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
请参阅图1及图2，本申请实施方式提供一种集流体100，集流体100包括本体10及折叠组件20。折叠组件20的至少部分能够相对于本体10弯折。折叠组件20包括至少两个层叠的折叠件21，所述折叠件设置至少一个凹部40。集流体100在振动过程中尤其是振动疲劳时，弯折部分很容易出现断裂的问题。然而由于在本申请的集流体100中，折叠组件20包括至少两个层叠在一起的折叠 件21，如此有利于增加折叠组件20的刚性，降低折叠组件20断裂的可能性，从而解决集流体100在振动疲劳时易断裂的问题，以延长集流体100的使用寿命。
具体地，折叠组件20包括多个层叠的折叠件21。其中，多个折叠件21可以通过粘胶贴合在一起，以组成折叠组件20。如图2所示，折叠组件20包括五个折叠件21。五个折叠件21层叠在一起以组成折叠组件20。
在一些实施例中，至少一个折叠件21的长度大于本体10的任意两点之间的距离。如此，折叠件21能够进行较大程度的弯折，集流体100缓冲振动的作用能够得到加强。示例地，如图2所示，折叠组件20包括五个折叠件21，五个折叠件21的长度相同且大于本体10的任意两点之间的距离。
请参阅图1，在一些实施例中，至少一个折叠件21的宽度小于本体10的位于折叠件21的两侧之间的宽度。如此，既能够保证集流体100的正常的过流能力，也能够避免折叠件21过宽而在安装时产生干涉作用。如图2所示，折叠组件20包括五个折叠件21，五个折叠件21的宽度相同且小于本体10的位于折叠件21的两侧之间的宽度。
请参阅图1及图2，在一些实施例中，折叠组件20包括弯折部22和连接部23，弯折部22通过连接部23连接本体10，弯折部22能够相对连接部23弯折。具体地，每个折叠件21均包括子弯折部221及子连接部231，在多个折叠件21层叠设置形成折叠组件20时，多个子弯折部221层叠设置形成弯折部22，多个子连接部231层叠设置形成连接部23。弯折部22通过连接部23与本体10连接，且弯折部22能够相对于连接部23弯折，以实现弯折部22相对本体10弯折。其中，连接部23可以与本体10焊接为一体，如此能够使多层的折叠组件20和本体10紧固连接，保证多层的折叠组件20和本体10连接的可靠性。
进一步地，在一些实施例中，连接部23的厚度大于本体10的厚度，如此能够保证连接部23与本体10连接的结构强度。
需要说明的是，在一些实施例中，在一些实施例中，本体10可采用单层硬质盘状结构，如此可以降低集流体100的制造成本，同时易于生产制造。当然，在一些实施例中，本体10也可以是多层结构，在此不作限制。为了方便说明，本申请实施例均以本体10为单层硬质盘状结构为例进行说明。
在一些实施例中，连接部23的至少部分固定连接于本体10的一侧。其中，连接部23的至少部分可以和本体10焊接为一体。如此能够使多层的折叠组件20和本体10紧固连接，保证多层的折叠组件20和本体10连接的可靠性。
示例地，请参阅图1及图2，在一些实施例中，折叠组件20包括折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5。其中，折叠件a2层叠在折叠件a1上，折叠件a3层叠在折叠件a2上、折叠件a4层叠在折叠件a3上、折叠件a5层叠在折叠件a4上，且折叠件a1子连接部231远离子弯折部221的一端与本体10连接。如此便能够实现连接部23的至少部分与本体10的一侧固定连接。
需要说明的是，在如图2所示的实施例中，可以先将折叠件a1与本体10连接后，再将折叠件a2层叠在折叠件a1上，折叠件a3层叠在折叠件a2上、折叠件a4层叠在折叠件a3上、折叠件a5层叠在折叠件a4上，以形成集流体100。当然，也可以先将五个折叠件21组成折叠组件20后再与本体10连接，在此不做限制。
请参阅图3，图3即为折叠组件20相对于本体10弯折后的状态。在一些实施例中，弯折后的弯折部22在本体10上的正投影覆盖连接部23的至少部分。
请再次参阅图3及图4，在一些实施例中，弯折后的弯折部22在本体10上的正投影面积大于连接部23在本体10上的正投影面积。图4为弯折部22被弯折后，弯折部22及连接部23在本体10上的投影的示意图。其中，图4中S1表示弯折后的弯折部22在本体10上的正投影，图4中S2表示连接部23在本体10上的正投影，可以看到，弯折后的弯折部22在本体10上的正投影S1的面积大于连接部23在本体10上的正投影S2的面积。一方面，由于弯折后的弯折部22的面积更大，能够保证集流体100的过流能力，并且能够使集流体100具有较大的散热面积，利于散热；另一方面，由于连接部23的面积相对小，如此和本体10焊接时占用本体10的面积较小，以保证本体10预留有充足的设置空间去焊接极耳，继而保证集流体100的过流能力。
进一步地，在一些实施例中，弯折后的弯折部22在本体10上的正投影的至少部分和连接部23在本体10上的正投影重叠。也即，弯折后的弯折部22的主体部分位于本体10的正上方，如此有利于防止集流体100在入壳过程中出现偏心问题。
此外，在一些实施例中，相邻的两个弯折后的折叠件21在本体10上的正投影至少部分重叠。特别地，在一些实施例中，相邻的两个弯折后的折叠件21在本体10上的正投影完全重叠，如此有利于防止集流体100在入壳过程中出现偏心问题。
请参阅图5，在一些实施例中，凹部40包括第一凹部25，连接部23和弯折部22的连接处具有至少一个第一凹部25，至少一个第一凹部25位于连接处的端侧。示例地，连接处包括相对的两个端侧，两个端侧中至少一个端侧设有第一凹部25。由于在连接部23和弯折部22的连接处具有至少一个第一凹部25，如此弯折部22能够沿第一凹部25相对于连接部23弯折，有利于折叠组件20折叠，也即有利于集流体100折叠。此外，还能够保证集流体100按照指定方向折叠，并且在后续组装成电池2000时，有利于防止集流体100在入壳的过程中出现偏心问题。
在一些实施例中，第一凹部25也可以作为限位部使用。示例地，在一个例子中，集流体100可以通过第一凹部25和其他部件(例如下塑胶)的限位件进行配合，以限定集流体100的位置。如此能够降低电池2000装配的复杂程度。
进一步地，请参阅图5，在一些实施例中，第一凹部25的数目为两个，两个第一凹部25分别位于弯折部22与连接部23的连接处的两端。在第一凹部25作为集流体100弯折使用时，由于两个第一凹部25分别位于弯折部22与连接部23的连接处的两端，弯折部22能够沿位于弯折部22与连接部23的连接处两端的两个第一凹部25相对于连接部23弯折，有利于折叠组件20弯折，从而能够使集流体100折叠的稳定性更佳。在第一凹部25作为限位部使用时，由于两个第一凹部25分别位于连接处的两端，能够对集流体100整体起到较佳的稳定定位作用。
请参阅图5及图6，连接处包括至少两个层叠的折叠件21的至少部分，第一凹部25包括至少一个第一子凹部251，至少一个折叠件21具有第一子凹部251，第一子凹部251位于折叠件21的端侧。在第一凹部25作为集流体100弯折使用时，由于连接处包括至少两个层叠的折叠件21的至少部分，第一凹部25包括至少一个第一子凹部251，且至少一个折叠件21的端侧具有第一子凹部251，如此能够使集流体100折叠的稳定性更加，并且还能够使弯折的集流体100不易起褶皱，有利于集流体100导流。在第一凹部25作为限位部使用时，由于连接处包括至少两个层叠的折叠件21的至少部分，第一凹部25包括至少一个第一子凹部251，且至少一个折叠件21的端侧具有第一子凹部251，如此降低第一凹部25和其他部件进行限位配合的难度。
例如，在一些实施例中，至少两个折叠件21包括第一折叠件21和第二折叠件21，第一折叠件21和第二折叠件21层叠设置，第一折叠件21具有第一子凹部251，第二折叠件21具有第一子凹部251，第一折叠件21的第一子凹部251和第二折叠件21的第一子凹部251层叠设置。由于在第一折叠件21和第二折叠件21层叠设置时，第一折叠件21的第一子凹部251和第二折叠件21的第一子凹部251层叠设置，如此，在第一凹部25作为集流体100弯折使用时，能够提升集流体100折叠的稳定性，并能够保证集流体100具有较好的导流作用；在将第一凹部25作为限位部使用时，层叠设置的第一子凹部251能够提高第一凹部25和其他部件(例如下塑胶)的限位件进行限位配合时的稳定性。
再例如，请参阅图6，在一些实施例中，折叠件21的数目为多个，每个折叠件21具有第一子凹部251，位于连接处的同一侧的多个第一子凹部251层叠设置。由于在多个折叠件21层叠设置时，位于不同折叠件21同一侧的多个第一子凹部251层叠设置，如此，在第一凹部25作为集流体100弯折使用时，能够使集流体100折叠的稳定性更佳，并能够保证集流体100具有较好的导流作用；在第一凹部25在作为限位部使用时，能够降低第一凹部25和其他部件进行限位配合的难度，并且提高第一凹部25和其他部件配合的结构稳定性。
具体地，如图5及图6所示，其中，图6为折叠组件20的分解示意图，图5为多个折叠件21层叠的示意图。折叠组件20包括折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5。折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5均包括子弯折部221及子连接部231，且每个折叠件21的子弯折部221与子连接部231的连接处的两端分别具有第一子凹部b1及第二子凹部b2。在折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5层叠时，位于折叠件a1、折叠件a2、折叠 件a3、折叠件a4及折叠件a5的子弯折部221及子连接部231的连接处其中一侧的第一子凹部b1层叠，以形成第一凹部B1；位于折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5的子弯折部221及子连接部231的连接处另一侧的第一子凹部b2层叠，以形成第一凹部B2。第一凹部B1及第一凹部B2位于连接处的两端。
其中，在一些实施例中，第一子凹部251可以为弧形槽。如此，在第一凹部25在作为集流体100弯折使用时，能够使集流体100折叠的稳定性更佳，并能够防止集流体100折叠时对自身或其他部件产生干涉作用；在第一凹部25在作为限位部使用时，能够降低第一凹部25和其他部件进行限位配合的难度，并且还能够提升第一凹部25和其他部件配合的结构稳定性。
请参阅图5，在一些实施例中，连接处包括第一折痕部26，第一折痕部26连接第一凹部25，弯折部22能够沿第一折痕部26相对于连接部23弯折。由于第一折痕部26连接第一凹部25，在弯折部22沿第一折痕部26相对于连接部23弯折时，能够提升集流体100折叠的稳定性，还能够使集流体100弯折时不容易错位。
具体地，第一凹部25的数目为两个，两个第一凹部25分别位于连接处的两端，第一折痕部26连接两个第一凹部25，第一折痕部26位于两个第一凹部25之间。由于第一折痕部26位于两个第一凹部25之间，也即第一折痕部26的两端均具有第一凹部25，如此相较于仅第一折痕部26的一端具有第一凹部25，弯折部22沿第一折痕部26相对于连接部23弯折时，能够进一步地提升集流体100折叠的稳定性，还能够使集流体100弯折时不容易错位。
请参阅图5及图6，在一些实施例中，第一折痕部26包括至少两个层叠的折叠件21的至少部分，第一折痕部26包括两个或多个第一子折痕部261，至少一个折叠件21具有第一子折痕部261，两个或多个第一子折痕部261层叠设置。由于至少一个折叠件21上具有第一子折痕部261，且位于不同折叠件21上的第一子折痕部261层叠设置，如此在弯折部22沿第一折痕部26相对于连接部23弯折时，能够提升集流体100折叠的稳定性，还能够使集流体100弯折时不容易错位，使集流体100弯折时的准确度更高。
示例地，如图5及图6所示，其中，图6为折叠组件20的分解示意图，图5为多个折叠件21层叠的示意图。折叠组件20包括折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5。折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5均包括子弯折部221及子连接部231，每个折叠件21的子弯折部221与子连接部231的连接处的两端均具有第一子凹部251，且每个折叠件21都具有连接两个第一子凹部251的第一子折痕部261。在折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5层叠时，位于折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5的第一子折痕部261层叠设置，以形成第一折痕部26。
请参阅图5，在一些实施例中，凹部40包括第二凹部27，弯折部22具有至少一个第二凹部27，至少一个第二凹部27位于弯折部22的端侧。其中，在一些实施例中，弯折部22能够沿第二凹部27弯折，有利于折叠组件20折叠，也即有利于集流体100折叠。此外，还能够保证集流体100按照指定方向折叠，并且在后续组装成电池2000时，有利于防止集流体100在入壳的过程中出现偏心问题。
在一些实施例中，第二凹部27也可作为限位部使用。示例地，在一个例子中，集流体100可以通过第二凹部27和其他部件(例如下塑胶)的限位件进行配合，以限定集流体100的位置。如此能够降低电池2000装配的复杂程度。
具体地，请参阅图5，在一些实施例中，第二凹部27的数目为两个，两个第二凹部27分别位于弯折部22的端侧。在第二凹部27作为集流体100弯折使用时，由于两个第二凹部27分别位于弯折部22的端侧，弯折部22能够沿位于弯折部22两端的两个第二凹部27进行弯折，有利于折叠组件20弯折，从而能够使集流体100折叠的稳定性更佳。在第二凹部27作为限位部使用时，位于弯折部22两端的两个第二凹部27能够对集流体100整体起到较佳的稳定定位作用。
需要说明的是，在一些实施例中，弯折部22可以同时具有作为集流体100弯折使用的第二凹部27，及作为限位部使用的第二凹部27。也即，弯折部22包括至少两个第二凹部27，且其中一部分的第二凹部27作为集流体100弯折使用的第二凹部27，弯折部22能够沿这部分第二凹部27弯折；另一部分的第二凹部27作为限位部使用，可以通过这部分第二凹部27和其他部件的限位件进行配合，以限定集流体100的位置。
其中，在一些实施例中，设于弯折部22的同一侧的第二凹部27的具体作用可以不同。示例地，请 参阅图5，在一些实施例中，至少两个第二凹部27间隔设置于弯折部22的同一侧。具体地，在一些例子中，其中的一个或两个或多个第二凹部27可以作为集流体100弯折用，剩余中的一个或两个或多个第二凹部27可以用作限位部使用，以通过第二凹部27和其他部件的限位件配合，以限定弯折后的集流体100的位置。
例如，如图5所示，弯折部22包括三个第二凹部27，分别为第二凹部C1、第二凹部C2及第二凹部C3。其中，第二凹部C1及第二凹部C2间隔设于弯折部22的其中一侧，第二凹部C3设于弯折部22的另一侧，且第二凹部C2与第二凹部C3对应。第二凹部C1用作限位部使用，以通过第二凹部C1和其他部件的限位件配合，以限定弯折后的集流体100的位置。第二凹部C2及第二凹部C3作为集流体100弯折用，弯折部22能够沿第二凹部C2及第二凹部C3进行弯折，有利于折叠组件20弯折，从而能够使集流体100折叠的稳定性更佳。
进一步地，在一些实施例中，沿弯折部22的同一侧间隔设置的两个第二凹部27的形状和/或尺寸不同。由于位于同一侧间隔设置的两个第二凹部27的形状和/或尺寸不同，即便将作用不同的两个第二凹部27设于弯折部22的同一侧，也能够轻易根据第二凹部27的形状和/或尺寸将具体作用不同的两个第二凹部27区分开。例如，在将对应第二凹部27作为限位部使用时，第二凹部27的尺寸可以设置得相对较小；在将对应第二凹部27作为集流体100弯折使用时，第二凹部27的尺寸可以设置得相对较大。
在一些实施例中，还可以将具体作用不同的第二凹部27设于弯折部22的不同侧。示例地，请参阅图7，在一些实施例中，弯折部22包括连接的第一端侧2201和第二端侧2202，第一端侧2201具有至少一个第二凹部27，第二端侧2202具有至少一个第二凹部27。如此位于不同端侧的第二凹部27可以起到不同的功能作用，以避免相互干涉。
例如，如图7所示，弯折部22包括两个第二凹部27，分别为第二凹部C1及第二凹部C2。其中，第二凹部C1位于弯折部22的第一端侧2201，且作为集流体100弯折用；第二凹部C2位于弯折部22的第二端侧2202，且作为限位部使用。也即，弯折部22能够沿第二凹部C1弯折，并通过第二凹部C2和其他部件的限位件配合以限定弯折后的集流体100的位置。
请参阅图5及图8，在一些实施例中，弯折部22包括至少两个层叠的折叠件21的至少部分，第二凹部27包括至少一个第二子凹部271，至少一个折叠件21具有至少一个第二子凹部271，第二子凹部271位于折叠件21的端侧。在第二凹部27作为集流体100弯折使用时，由于第二凹部27包括至少一个第二子凹部271，且至少一个折叠件21具有至少一个第二子凹部271，如此能够使集流体100折叠的稳定性更佳，并且使得弯折的集流体100也不容易起皱褶，有利于集流体100导流。在第二凹部27作为限位部使用时，由于第二凹部27包括至少一个第二子凹部271，且至少一个折叠件21具有至少一个第二子凹部271，如此能够降低第二凹部27和其他部件进行限位配合的难度。
在一些实施例中，至少两个折叠件21包括第三折叠件21和第四折叠件21，第三折叠件21和第四折叠件21层叠设置，第三折叠件21具有第二子凹部271，第四折叠件21具有第二子凹部271，第三折叠件21的第二子凹部271和第四折叠件21的第二子凹部271层叠设置。由于在第三折叠件21和第四折叠件21层叠设置时，第三折叠件21的第二子凹部271和第四折叠件21的第二子凹部271层叠设置，如此，在第二凹部27在作为集流体100弯折使用时，能够使集流体100折叠的稳定性较佳，并能够保证集流体100具有较好的导流作用；在将第二凹部27作为限位部使用时，层叠设置的第二子凹部271能够提升第二凹部27和其他部件(例如下塑胶)的限位件进行限位配合时的稳定性。
请参阅图5及图8，在一些实施例中，折叠件21的数目为多个，每个折叠件21具有第二子凹部271，位于弯折部22的同一侧的多个第二子凹部271层叠设置。由于在多个折叠件21层叠设置时，位于不同折叠件21同一侧的多个第二子凹部271层叠设置，如此，在第二凹部27作为集流体100弯折使用时，能够使集流体100折叠的稳定性更佳，并能够保证集流体100具有较好的导流作用；在第二凹部27在作为限位部使用时，能够降低第二凹部27和其他部件进行限位配合的难度，并且提高第二凹部27和其他部件配合的结构稳定性。
具体地，如图5及图8所示，其中，图8为折叠组件20的分解示意图，图5为多个折叠件21层叠的示意图。折叠组件20包括折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5。折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5均包括子弯折部221及子连接部231，且每个折叠件21的子弯折部221均包括第二子凹部c1、第二子凹部c2及第二子凹部c3。对于每个折叠件21，第 二子凹部c1及第二子凹部c2设于折叠件21的同一侧，第二凹部C3位于折叠件21的另一侧，且第二凹部C3与第二子凹部c2对应。在折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5层叠时，多个折叠件21的子弯折部221层叠以形成弯折部22。折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5的第二子凹部c1层叠，以形成第二凹部C1；折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5的第二子凹部271层叠d2，以形成第二凹部C2；折叠件a1、折叠件a2、折叠件a3、折叠件a4及折叠件a5的第二子凹部271层叠d3，以形成第二凹部C3。其中，第二凹部C2及第二凹部C3作为集流体100弯折使用时，即弯折部22能够沿第二凹部C2及第二凹部C3弯折，第二凹部C1用作限位部使用，以通过第二凹部C1和其他部件的限位件配合，以限定弯折后的集流体100的位置。
在一些实施例中，至少一个折叠件21的两端分别具有一个第二子凹部271，折叠件21的两个第二子凹部271对称设置。如此在第二凹部27作为集流体100弯折使用时，有利于折叠组件20弯折，从而能够使集流体100折叠的稳定性更佳。
同样地，在一些实施例中，第二子凹部271可以为弧形槽。如此，在第二凹部27在作为集流体100弯折使用时，能够使集流体100折叠的稳定性更佳，并能够防止集流体100折叠时对自身或其他部件产生干涉作用；在第二凹部27在作为限位部使用时，能够降低第二凹部27和其他部件进行限位配合的难度，并且还能够提升第二凹部27和其他部件配合的结构稳定性。
请参阅图5，在一些实施例中，弯折部22包括第一弯折部223、第二弯折部222和第二折痕部28，第二折痕部28位于第一弯折部223和第二弯折部222之间，第二折痕部28连接第二凹部27，第一弯折部223能够沿第二折痕部28相对于第二弯折部222弯折。由于第二折痕部28连接第二凹部27，在第一弯折部223沿第二折痕部28相对于第二弯折部222弯折时，能够提升集流体100折叠的稳定性，还能够使集流体100弯折时不容易错位。
具体地，在一些实施例中，第二凹部27的数目为两个，两个第二凹部27分别位于第二折痕部28的两端，第二折痕部28连接两个第二凹部27。由于第二折痕部28连接两个第二凹部27，即第二折痕部28的两端均具有第二凹部27，如此相较于仅第二折痕部28的一端具有第二凹部27，第一弯折部223沿第二折痕部28相对于第二弯折部222弯折时，能够进一步地提升集流体100折叠的稳定性，还能够使集流体100弯折时不容易错位。
请结合图8，在一些实施例中，第二折痕部28由层叠设置的至少两个折叠件21的部分构成，第一弯折部223包括层叠设置的至少两个折叠件21的部分，第二弯折部222包括层叠设置的至少两个折叠件21的部分。如此有利于第一弯折部223沿第二折痕部28相对于第二弯折部222弯折。
具体地，在一些实施例中，第二折痕部28包括至少两个层叠的折叠件21的至少部分，第二折痕部28包括两个或多个第二子折痕部281，至少一个折叠件21具有第二子折痕部281，两个或多个第二子折痕部281层叠设置。由于至少一个折叠件21上具有第二子折痕部281，且位于不同折叠件21上的第二子折痕部281层叠设置，如此在第一弯折部223沿第二折痕部28相对于第二弯折部222弯折时，能够提升集流体100折叠的稳定性，还能够使集流体100弯折时不容易错位，使集流体100弯折时的准确度更高。
示例地，如图5及图8所示，其中，图8为折叠组件20的分解示意图，图5为多个折叠件21层叠的示意图。折叠组件20包括5个折叠件21，每个折叠件21包括第一子弯折部2231、第二子弯折部2221及第二子折痕部281，其中第二子折痕部281位于第一子弯折部2231及第二子弯折部2221之间，且第一子弯折部2231能够沿第二子折痕部281相对于第二子弯折部2221弯折。在五个折叠件21层叠形成折叠组件20时，每个折叠件21的第二子折痕部281层叠形成第二折痕部28。
请参阅图5，在一些实施例中，在第一弯折部223和第二弯折部222处于展平状态的条件下，第二折痕部28相对于第一弯折部223下凹，第二折痕部28相对于第二弯折部222下凹。如此有利于第一弯折部223沿第二折痕部28相对于第二弯折部222弯折。
需要说明的是，在一些实施例中，沿第二折痕部28弯折后的第一弯折部223具有间隙。由于沿第二折痕部28弯折后的第一弯折部223具有间隙，能够给弯折后的折叠件21预留缓冲空间，从而能够避免集流体100在振动的过程中尤其是振动疲劳时，出现断裂的问题，从而延长集流体100的使用寿命。
此外，在一些实施例中，在折叠组件20弯折的条件下，至少两个相邻的折叠件21之间也可以具有间隙。如此也能够给弯折后的折叠件21预留缓冲空间，从而能够避免集流体100在振动的过程中尤其是 振动疲劳时，出现断裂的问题，从而延长集流体100的使用寿命。
请参阅图1及图9，在一些实施例中，本体10具有贯穿本体10的至少一个通孔11。由于在本体10上开设至少一个通孔11，有利于电解液流通和/或有利于降低本体10局部厚度。
例如，请参阅图1及图9，在一些实施例中，至少一个通孔11包括至少一个第一通孔111，在折叠组件20的至少部分相对于本体10弯折的条件下(请结合图3理解)，折叠组件20在本体10上的正投影覆盖第一通孔111的至少部分。其中，电池2000中的电解液能够通过第一通孔111流通，从而有利于使电解液能够在电池2000内均匀分布。
上述的“在折叠组件20的至少部分相对于本体10弯折的条件下”可以结合图3进行理解。具体地，在一些例子中，在将集流体100安装于电池中2000后，当电池2000处于正常工作时，弯折后的折叠组件20在本体10上的正投影覆盖第一通孔111的至少部分。即，上述的“在折叠组件20的至少部分相对于本体10弯折的条件下”的情况可以理解为集流体100安装于电池2000中作为导电件使用时所具有的构造情况。
再例如，请参阅图9，在一些实施例中，至少一个通孔11还可以包括至少一个第二通孔112，在折叠组件20的至少部分相对于本体10弯折的条件下，折叠组件20在本体10上的正投影覆盖第二通孔112的面积为零。也即，在折叠组件20的至少部分相对于本体10弯折的条件下，折叠组件20在本体10上的正投影不能覆盖第二通孔112。
上述的“在折叠组件20的至少部分相对于本体10弯折的条件下”可以结合图3进行理解。具体地，在一些例子中，在将集流体100安装于电池2000中后，当电池2000处于正常工作时，弯折后的折叠组件20在本体10上的正投影覆盖第二通孔112的面积为零。即，上述的“在折叠组件20的至少部分相对于本体10弯折的条件下”的情况可以理解为集流体100安装于电池2000中后的状态。
需要说明的是，本申请中所描述的弯折后的折叠组件20所具有的特征均可以理解为集流体100安装于电池2000中后能够具有的特征。因此，对于此，后续不再赘述。
一方面，由于本体10开设有第二通孔112，如此有利于减小本体10的局部厚度，从而降低集流体100的质量；另一方面，由于在折叠组件20的至少部分相对于本体10弯折的条件下，折叠组件20在本体10上的正投影覆盖第二通孔112的面积为零，电池2000中的电解液不能通过第二通孔112流通，从而能够避免影响电池2000正常工作。
在一些实施例中，在折叠组件20的至少部分相对于本体10弯折的条件下，至少一个第二通孔112位于弯折后的折叠组件20的同一侧。由于本体10开设有第二通孔112，如此有利于减小本体10的局部厚度，从而降低集流体100的质量。
在一些实施例中，第二通孔112的数目为两个及以上，任意两个第二通孔112间隔设置。由于本体10开设有第二通孔112，如此有利于减小本体10的局部厚度，从而降低集流体100的质量。
例如，在一些实施例中，第二通孔112的数目为两个及以上，且至少两个间隔设置的两个第二通孔112之间的间距小于折叠件21的宽度。再例如，在一些实施例中，所述第二通孔112的数目为两个及以上，任意相邻的两个第二通孔112的最短距离之间的连接线位于弯折后的折叠组件20在本体10上的正投影外。再例如，在一些实施例中，第二通孔112的数目为两个及以上，任意相邻的两个第二通孔112的最短距离之间的连接线的至少部分由弯折后的折叠组件20在本体10上的正投影覆盖。
需要说明的是，在一些实施例中，第二通孔112呈圆形，有利于加工。当然，在一些实施例中，第二通孔112还可以呈其他形状，例如三角形、矩形、菱形、六边形等，在此不作限制。
请参阅图10，在一些实施例中，弯折部22远离连接部23的一端具有一个通道30，通道30被配置为连接极柱200(如图12所示)，极柱200的至少部分位于通道30内，通道30位于弯折部22远离连接部23的一端的中部。由于通道30设置在弯折部22的中部，当弯折部22通过通道30连接极柱200时，可有效增加极柱200与弯折部22之间连接的稳定性。
具体地，请参阅图10及图11，在一些实施例中，弯折部22包括至少两个层叠的折叠件21的至少部分，每个折叠件21开设有第三通孔31，至少两个第三通孔31层叠设置以形成通道30。由于每个折叠件21均开设有第三通孔31，使得极柱200穿设整个折叠组件20，加强集流体100与极柱200之间连接的稳定性。
例如，请参阅图10及图11，图11为折叠组件20的分解示意图，图10为多个折叠件21层叠的示意 图。折叠组件20包括五个折叠件21，每个折叠件21包括子弯折部221及子连接部231，且每个折叠件21的子弯折部221远离子连接部231的一端均开设有第三通孔31。在五个折叠件21层叠以形成折叠组件20时，多个子弯折部221层叠设置以形成弯折部22，多个第三通孔31层叠设置以形成通道30。
请参阅图9，在一些实施例中，弯折部22远离连接部23的一端具有两个通道30，通道30被配置为连接极柱200，极柱200的至少部分位于通道30内，两个通道30间隔设置。如此能够使集流体100同时与两个极柱200连接，从而能够使得集流体100与电池2000之间的连接的稳定性更佳。
具体地，在一些实施例中，弯折部22包括第一端2203和第二端2204，第一端2203为弯折部22远离连接部23的一端，第二端2204相对于第一端2203靠近连接部23，第一端2203的宽度大于第二端2204的宽度，第一端2203具有两个通道30。一方面，由于第一端2203的宽度大于第二端2204的宽度，如此能够保证集流体100的正常过流能力；另一方面，由于设置两个通道30，能够使集流体100同时与两个极柱200连接，从而能够使得集流体100与电池2000之间的连接的稳定性更佳。
其中，在一些实施例中，两个通道30的边缘之间的距离小于第二端2204的宽度。如此，使得两个通道30的边缘均包括部分集流体100的结构，保证集流体100与极柱200之间的连接的稳定性。
请参阅图9，在一些实施例中，凹部40包括第三凹部29，弯折部22具有至少一个第三凹部29，至少一个第三凹部29位于弯折部22的端侧，第三凹部29位于第一端2203和第二端2204之间，弯折部22能够沿第三凹部29弯折。如此能够有利于折叠组件20折叠，也即有利于集流体100折叠。此外，还能够保证集流体100按照指定方向折叠，并且在后续组装成电池2000时，有利于防止集流体100在入壳的过程中出现偏心问题。
折叠组件20中的多个折叠件21的厚度可以不完全相同。在一些实施例中，至少两个折叠件21包括第五折叠件21和第六折叠件21，第五折叠件21的厚度小于第六折叠件21的厚度。由于折叠件21的厚度设置的不同，既可以保证折叠组件20整体的结构强度，也便于折叠组件20的弯折，同时保证折叠组件20作为导电件的过流能力。并且，这样可以根据电池2000其他部件(例如下塑胶或极耳的形式或极柱的结构)的设计情况进行对应匹配，以提高集流体100的可设置空间。
在一些实施例中，第五折叠件21的数量至少为两个，至少两个第五折叠件21层叠设置。如此，既可以保证折叠组件20整体的结构强度，避免折叠组件20的折叠件21在振动的过程中尤其是振动疲劳时，出现断裂的问题，也便于折叠组件20的弯折，同时保证折叠组件20作为导电件的过流能力。并且，需要说明的是，在技术验证测试中发现，即使第五折叠件21中的一个或两个第五折叠件21出现断裂，集流体100作为导电转接件也能够实现正常的过流。
需要说明的是，当第五折叠件21的数量至少为两个，且至少两个第五折叠件21层叠设置时，在一些实施例中，第六折叠件21位于层叠设置的至少两个第五折叠件21的一侧。由于厚度较厚的第六折叠件21设于至少两个第五折叠件21的一侧，如此能够保证折叠组件20整体的结构强度。
在一些实施例中，第五折叠件21的厚度为第六折叠件21的厚度的5％～95％。如此，可以根据具体应用环境设置第五折叠件21和第六折叠件21的厚度。并且，这样可以根据电池2000其他部件(例如下塑胶或极耳的形式或极柱的结构)的设计情况进行对应匹配，以提高集流体100的可设置空间。
进一步地，在一些实施例中，第五折叠件21的厚度为第六折叠件21的厚度的8％～50％。如此，这样既可以保证折叠组件20整体的结构强度，避免折叠组件20的折叠件21在振动的过程中尤其是是振动疲劳时，出现断裂的问题，也便于折叠组件20的弯折，同时保证折叠组件20作为导电件的过流能力。另外，由于第六折叠件21的厚度较厚，这样折叠组件20整体设置的折叠件21层数可以相对较少，以减少集流体100在电池2000内占用的设置空间，并可以降低集流体100的制造成本。另外，这样折叠组件20弯折时不容易起皱。
当然，在一些实施例中，第五折叠件21的厚度为第六折叠件21的厚度的45％～95％。如此，既可以保证折叠组件20整体的结构强度，避免折叠组件20的折叠件21在振动的过程中尤其是是振动疲劳时，出现断裂的问题，也便于折叠组件20的弯折，同时保证折叠组件20作为导电件的过流能力。另外，第五折叠件21和第六折叠件21的厚度相近，折叠组件20整体结构的一致性较好，过流较为均衡。并且，各个折叠件21可以设置得较薄，整体柔性较好，弯折效果整体更佳。
在一些实施例中，每个折叠件21的厚度在[0.05mm，0.3mm]范围内。例如，折叠件21的厚度可以为0.05mm、0.06mm、0.08mm、0.12mm、0.16mm、0.18mm、0.23mm、0.25mm、0.28mm、0.30mm等。由 于若折叠件21的厚度过薄，比如折叠件21的厚度小于0.05mm，如此在一定数量下的多个折叠件21层叠在一起形成的折叠组件20，在振动过程中尤其是振动疲劳时，还是很容易出现断裂的问题；若折叠件21的厚度过厚，比如折叠件21的厚度大于0.3mm，如此折叠件21不易折叠，还会增加集流体100的整体厚度，不利于降低电池2000的体积及质量。因此，在本实施例中，由于每个折叠件21的厚度在[0.05mm，0.3mm]范围内，如此不仅能够解决集流体100在振动疲劳时易断裂的问题，还不影响集流体100的正常折叠。
请参阅图1，在一些实施例中，本体10远离集流体100的一侧具有避让缺口12，避让缺口12贯通本体10的部分边缘。由于本体10边缘设有避让缺口12，避让缺口12能够用于避让防爆阀。
请参阅图13，在一些实施例中，本申请实施方式还提供一种用于电池2000的端盖组件1000。端盖组件1000包括盖板300及上述任意一项实施例中所述的集流体100，集流体100与盖板300连接。
在本申请的端盖组件1000中，通过将集流体100中的可折叠的折叠组件20设置为多层结构，如此有利于增加折叠组件20的刚性，降低折叠组件20断裂的可能性，从而解决集流体100在振动疲劳时易断裂的问题，以延长端盖组件1000的使用寿命。
请参阅图13，在一些实施例中，本申请实施方式还提供一种电池2000。电池2000包括裸电芯400、外壳500及上述任意一项实施例中所述的端盖组件1000，裸电芯400的至少部分容纳于外壳500内，端盖组件1000与裸电芯400连接。
在本申请的电池2000中，通过将集流体100中的可折叠的折叠组件20设置为多层结构，如此有利于增加折叠组件20的刚性，降低折叠组件20断裂的可能性，从而解决集流体100在振动疲劳时易断裂的问题，以延长电池2000的使用寿命。
请结合图1及图14，在一些实施例中，外壳500呈圆柱体状，定义平行于圆柱体的中心线的方向为第一方向D1，弯折后的折叠组件20在第一方向D1上的正投影的至少部分落在本体10上。由于弯折后的折叠组件20在第一方向D1上的正投影的至少部分落在本体10上，如此有利于防止出现偏心问题。
在一些实施例中，弯折后的折叠组件20在第一方向D1上的正投影的至少部分落在裸电芯400上。由于弯折后的折叠组件20在第一方向D1上的正投影的至少部分落在裸电芯400上，如此有利于集流体100与裸电芯400的配合。
在一些实施例中，裸电芯400包括极耳401，极耳401被配置为和本体10连接，弯折后的折叠组件20在第一方向D1上的正投影的至少部分落在极耳401上。由于弯折后的折叠组件20在第一方向D1上的正投影的至少部分落在极耳401上，如此有利于集流体100与裸电芯400的配合。
请参阅图15，在一些实施例中，本申请实施方式还提供一种电池包4000，电池包4000包括电池箱3000及上述任意一项实施例中所述的电池2000，电池2000的至少部分收容于电池箱3000内。
在本申请的电池包4000中，通过将电池2000中的集流体100的可折叠的折叠组件20设置为多层结构，如此有利于增加折叠组件20的刚性，降低折叠组件20断裂的可能性，从而解决集流体100在振动疲劳时易断裂的问题，以延长电池2000的使用寿命。
在本说明书的描述中，参考术语“某些实施方式”、“一个实施方式”、“一些实施方式”、“示意性实施方式”、“示例”、“具体示例”、或“一些示例”的描述意指结合所述实施方式或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施方式或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施方式或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施方式或示例中以合适的方式结合。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个所述特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个，除非另有明确具体的限定。
尽管上面已经示出和描述了本申请的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本申请的限制，本领域的普通技术人员在本申请的范围内可以对上述实施例进行变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。

Claims (24)

  1. 一种集流体，包括：
    本体；及
    折叠组件，所述折叠组件的至少部分能够相对于所述本体弯折，所述折叠组件包括至少两个层叠的折叠件，所述折叠件上设置至少一个凹部，
    所述折叠组件包括弯折部和连接部，所述弯折部通过所述连接部连接所述本体，所述弯折部能够相对于所述连接部弯折，所述连接部的至少部分固定连接于所述本体的一侧。
  2. 根据权利要求1所述的集流体，弯折后的所述弯折部在所述本体上的正投影覆盖所述连接部的至少部分。
  3. 根据权利要求1或2所述的集流体，弯折后的所述弯折部在所述本体上的正投影面积大于所述连接部在所述本体上的正投影面积。
  4. 根据权利要求1-3任一项所述的集流体，所述连接部的厚度大于所述本体的厚度。
  5. 根据权利要求1-4任一项所述的集流体，所述凹部包括第一凹部，
    所述连接处包括至少两个层叠的所述折叠件的至少部分，所述第一凹部包括至少一个第一子凹部，至少一个所述折叠件具有所述第一子凹部，所述第一子凹部位于所述折叠件的端侧，
    所述连接处包括第一折痕部，所述第一折痕部连接所述第一凹部，所述弯折部能够沿所述第一折痕部相对于所述连接部弯折，
    所述第一折痕部包括至少两个层叠的所述折叠件的至少部分，所述第一折痕部包括两个或多个第一子折痕部，至少一个所述折叠件具有所述第一子折痕部，所述两个或多个第一子折痕部层叠设置。
  6. 根据权利要求1-5任一项所述的集流体，所述凹部包括第二凹部，所述弯折部具有至少一个所述第二凹部，至少一个所述第二凹部位于所述弯折部的端侧；
    所述弯折部包括至少两个层叠的所述折叠件的至少部分，所述第二凹部包括至少一个第二子凹部，至少一个所述折叠件具有至少一个所述第二子凹部，所述第二子凹部位于所述折叠件的端侧。
  7. 根据权利要求6所述的集流体，其中，
    至少两个所述第二凹部间隔设置于所述弯折部的同一侧，并且沿所述弯折部的同一侧间隔设置的两个所述第二凹部的形状和/或尺寸相同或者不同；或者，
    所述弯折部包括连接的第一端侧和第二端侧，所述第一端侧具有至少一个所述第二凹部，所述第二端侧具有至少一个所述第二凹部。
  8. 根据权利要求6所述的集流体，所述弯折部包括第一弯折部、第二弯折部和第二折痕部，所述第二折痕部位于所述第一弯折部和所述第二弯折部之间，所述第二折痕部连接所述第二凹部，所述第一弯折部能够沿所述第二折痕部相对于所述第二弯折部弯折；
    在所述第一弯折部和所述第二弯折部处于展平状态的条件下，所述第二折痕部相对于所述第一弯折部下凹，所述第二折痕部相对于所述第二弯折部下凹；
    所述第二折痕部由层叠设置的所述至少两个折叠件的部分构成，所述第一弯折部包括所述层叠设置的所述至少两个折叠件的部分，所述第二弯折部包括所述层叠设置的所述至少两个折叠件的部分；
    所述第二凹部的数目为两个，两个所述第二凹部分别位于所述第二折痕部的两端，所述第二折痕部连接两个所述第二凹部；
    所述第二折痕部包括两个或多个第二子折痕部，至少一个所述折叠件具有所述第二子折痕部，所述两个或多个第二子折痕部层叠设置。
  9. 根据权利要求1-8任一项所述的集流体，在所述折叠组件弯折的条件下，至少两个相邻的折叠件之间具有间隙。
  10. 根据权利要求1-9任一项所述的集流体，至少一个所述折叠件的长度大于所述本体的任意两点之间的距离。
  11. 根据权利要求1-10任一项所述的集流体，相邻的两个弯折后的所述折叠件在所述本体上的正投影至少部分重叠。
  12. 根据权利要求1-11任一项所述的集流体，所述本体具有贯穿所述本体的至少一个通孔；
    所述至少一个通孔包括至少一个第一通孔或者至少一个第二通孔，在所述折叠组件的至少部分相对于所述本体弯折的条件下，所述折叠组件在所述本体上的正投影覆盖所述第一通孔的至少部分，
    所述折叠组件在所述本体上的正投影覆盖所述第二通孔的面积为零。
  13. 根据权利要求12所述的集流体，在所述折叠组件的至少部分相对于所述本体弯折的条件下，所述至少一个第二通孔位于弯折后的所述折叠组件的同一侧。
  14. 根据权利要求13所述的集流体，其中，所述第二通孔的数目为两个及以上，
    至少两个所述第二通孔间隔设置，间隔设置的两个所述第二通孔之间的间距小于所述折叠件的宽度；
    或者，任意两个所述第二通孔间隔设置；
    或者，任意相邻的两个所述第二通孔的最短距离之间的连接线位于弯折后的所述折叠组件在所述本体上的正投影外；
    或者，任意相邻的两个所述第二通孔的最短距离之间的连接线的至少部分由弯折后的所述折叠组件在所述本体上的正投影覆盖。
  15. 根据权利要求1所述的集流体，所述弯折部包括第一端和第二端，所述第一端为所述弯折部远离所述连接部的一端，所述第二端相对于所述第一端靠近所述连接部，所述第一端具有位于第一端的中部的一个通道或间隔设置的两个通道，所述通道被配置为连接极柱，极柱的至少部分位于所述通道内，
    所述弯折部包括至少两个层叠的所述折叠件的至少部分，每个所述折叠件开设有第三通孔，至少两个所述第三通孔层叠设置以形成所述通道。
  16. 根据权利要求15所述的集流体，所述第一端的宽度大于所述第二端的宽度。
  17. 根据权利要求15所述的集流体，两个所述通道的边缘之间的距离小于所述第二端的宽度。
  18. 根据权利要求15所述的集流体，所述凹部包括第三凹部，所述弯折部具有至少一个所述第三凹部，
    至少一个所述第三凹部位于所述弯折部的端侧，或者
    所述第三凹部位于所述第一端和所述第二端之间，所述弯折部能够沿所述第三凹部弯折。
  19. 根据权利要求1所述的集流体，所述至少两个折叠件的厚度不同。
  20. 根据权利要求1-19任一项所述的集流体，每个所述折叠件的厚度在[0.05mm，0.3mm]范围内。
  21. 根据权利要求1所述的集流体，所述本体远离所述折叠组件的一侧具有避让缺口，所述避让缺口贯通所述本体的部分边缘。
  22. 一种电池，包括：
    裸电芯；
    外壳，所述裸电芯的至少部分容纳于所述外壳内；及
    端盖组件，所述端盖组件与所述裸电芯连接，所述端盖组件包括：
    盖板；及
    权利要求1-21任一项所述的集流体，所述盖板与所述集流体连接。
  23. 根据权利要求22所述的电池，所述外壳呈圆柱体状，定义平行于所述圆柱体的中心线的方向为第一方向，弯折后的所述折叠组件在所述第一方向上的正投影的至少部分落在所述集流体的所述本体或所述裸电芯上。
  24. 一种电池包，包括：
    电池箱；及
    权利要求22或23所述的电池，所述电池的至少部分收容于所述电池箱内。
PCT/CN2023/108579 2022-07-21 2023-07-21 集流体、电池及电池包 Ceased WO2024017367A1 (zh)

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