WO2024001058A1 - 电池单体、电池及用电设备 - Google Patents

电池单体、电池及用电设备 Download PDF

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Publication number
WO2024001058A1
WO2024001058A1 PCT/CN2022/138044 CN2022138044W WO2024001058A1 WO 2024001058 A1 WO2024001058 A1 WO 2024001058A1 CN 2022138044 W CN2022138044 W CN 2022138044W WO 2024001058 A1 WO2024001058 A1 WO 2024001058A1
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WO
WIPO (PCT)
Prior art keywords
wall
battery cell
electrode lead
battery
electrode
Prior art date
Application number
PCT/CN2022/138044
Other languages
English (en)
French (fr)
Inventor
李玲玉
林蹬华
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to CN202280054245.5A priority Critical patent/CN117751491A/zh
Publication of WO2024001058A1 publication Critical patent/WO2024001058A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, and in particular to a battery cell, a battery and electrical equipment.
  • Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection.
  • battery technology is an important factor related to their development.
  • the purpose of this application is to provide a battery cell, battery and electrical equipment.
  • the battery composed of the battery cells has high assembly efficiency.
  • the present application provides a battery cell, including: a casing having a first wall; an electrode assembly disposed in the casing; and an electrode lead-out member installed on the first wall for connecting the Electric energy extraction from the electrode assembly; wherein, the electrode extraction member includes a first surface, a plane on which the first surface is located intersects the first wall, and the first surface is used to connect with a bus component.
  • the plane where the first surface is located intersects the first wall to facilitate the welding of the bus component and the electrode lead-out member, thereby improving the assembly efficiency of the battery composed of the battery cell.
  • the electrode lead-out member further includes a second surface, the plane on which the second surface is located intersects the first surface, the area of the second surface is D1, and the first surface The area of is D2, satisfying 0.1 ⁇ D2/D1 ⁇ 10.
  • the ratio of the area D2 of the first surface to the area D1 of the second surface satisfies the above relationship, which can take into account the energy density and flow area of the battery.
  • D2/D1 ⁇ 0.1 D2 is too small, and the welding area between the bus part and the electrode lead-out is too small, affecting the overcurrent capability; or, D1 is too large, and the electrode lead-out is in the direction perpendicular to the thickness direction of the first wall
  • the occupied area is too large, occupying the space of the electrode assembly and affecting the energy density.
  • D2 When 10 ⁇ D2/D1, D2 is too large, and the electrode lead-out part occupies too much space in the thickness direction of the first wall, affecting the energy density; or, D1 is too small, and the electrical connection between the tab and the electrode lead-out part The connection area between components (such as electrode terminals) and electrode lead-out parts is too small, affecting the overcurrent capability.
  • the welding area of the electrode lead-out piece and the busing part, and the welding area between the electrode lead-out piece and the electrode terminal can be further ensured, the over-current capacity is better, and the electrode lead-out piece occupies a smaller area, and the energy density of the battery is greater.
  • the size of the first surface is W1, satisfying 1mm ⁇ W1 ⁇ 10mm, preferably, 2mm ⁇ W1 ⁇ 5mm.
  • the size W1 of the first surface satisfies the above relationship, so that the first surface and the bus component can have a larger connection area to facilitate the connection between the first surface and the bus component.
  • the electrode lead-out member further includes a second surface, a plane on which the second surface is located intersects the first surface, and the electrode lead-out member is disposed on a side away from the first wall.
  • the electrode lead-out member On one side inside the battery cell, the electrode lead-out member includes a first part and a second part, the first part is electrically connected to the tab of the electrode assembly, and the second part is used to connect the bus component, The second surface is a surface of the first portion away from the first wall, and the first surface is a surface of the second portion.
  • the electrode lead-out piece is arranged on the side of the first wall facing away from the interior of the battery cell, so as to facilitate the connection between the electrode lead-out piece and the bus component; the first part and the second part are respectively used to realize the connection with the tab and the bus component.
  • the connection is conducive to increasing the connection area between the electrode lead-out piece and the electrode terminal and the connection area between the electrode lead-out piece and the bus component.
  • the battery cell further includes: an electrode terminal, the first wall is provided with an electrode lead-out hole, one end of the electrode terminal is connected to the first part, and the other end passes through the electrode lead-out hole. It is electrically connected to the tab of the electrode assembly.
  • the first part and the tab of the electrode assembly are electrically connected through the electrode terminal, so as to guide the electric energy of the electrode assembly to the electrode lead-out part, so that the electrode lead-out part can lead out the electric energy of the electrode assembly.
  • At least part of the second portion extends beyond the first portion along a thickness direction of the first wall.
  • At least part of the second part exceeds the first part to increase the area of the first surface, facilitate the connection between the second part and the bus component, and increase the connection area.
  • the first part and the second part are arranged along a first direction, and the first surface is a surface of the second part facing away from the first part along the first direction, so The first direction is perpendicular to the thickness direction of the first wall.
  • the first part and the second part are arranged along the first direction, and the first surface is the surface of the second part away from the first part along the first direction, which facilitates the assembly of the electrode lead-out part and the bus component.
  • the first portion is parallel to the first wall.
  • the first part is parallel to the first wall to facilitate assembly of the first part.
  • At least part of the second portion extends in a direction away from the first wall and beyond the second surface.
  • At least part of the second part exceeds the second surface, so that at least part of the second part is located on a side of the second surface away from the first wall, so as to reduce interference with the first wall when the second part is connected to the bus component.
  • the electrode lead-out member further includes a third part, and the third part connects the first part and the second part.
  • the third part connects the first part and the second part, so that there can be a certain distance between the first part and the second part to facilitate the connection of the electrode lead-out part and the bus part.
  • the third part includes a first section and a second section, the first section extends from the first section in a direction away from the first wall, and the second section connects A gap is formed between the first section and the second section, and between the first section and the second section.
  • a gap is formed between the first section and the second section so that the electrode lead-out member can be deformed to absorb the expansion stress generated when the battery cell expands.
  • the second part extends from the second section in a direction close to the first wall, and the first section, the second section and the second part form a U shape structure.
  • the first section, the second section and the second part form a U-shaped structure, which is simple in structure and easy to form.
  • the battery cell further includes a support member inserted in the gap.
  • the support member is inserted into the gap, and the support member can support the second part when the bus component is connected to the second part, thereby facilitating the connection between the second part and the bus component.
  • two opposite sides of the support member are in contact with the first section and the second part respectively.
  • the support member is in contact with the first segment and the second part, and the support member can play a position-limiting role, restricting the positional movement of the second part, so as to facilitate a stable connection between the second part and the bus component.
  • the support member is made of insulating material.
  • the support member extends beyond both ends of the third part.
  • the second direction is perpendicular to the thickness direction of the first wall. and parallel to the first surface.
  • the support member is made of insulating material, and the support member extends beyond both ends of the third part, thus having a better insulation effect.
  • the battery cell further includes: a first insulating member, at least partially disposed between the first wall and the first portion to insulate and isolate the first wall and the third portion. part.
  • At least part of the first insulating member is disposed between the first wall and the first part to separate the first wall and the first part, thereby improving the safety of the battery cell.
  • the support member is connected to the first insulating member.
  • the support member is connected to the first insulating member, so that the connection between the support member and the first insulating member is stable, so that the support member supports the second part.
  • the first insulating member extends beyond both ends of the first part along a second direction, and the second direction is perpendicular to the thickness direction of the first wall and parallel to the first wall. surface.
  • the first insulating member extends beyond both ends of the first part, so that the first part and the first wall have a better insulation effect.
  • the battery cell further includes: a second insulating member, at least partially disposed between the second part and the first wall, to insulate and isolate the second part from the first wall.
  • the first wall is a second insulating member, at least partially disposed between the second part and the first wall, to insulate and isolate the second part from the first wall. The first wall.
  • the second insulating member is disposed between the second part and the first wall to insulate and separate the second part from the first wall, thereby improving the safety of the battery cells.
  • the second insulating component is connected to the first insulating component.
  • the second insulating member is connected to the first insulating member, the connection between the second insulating member and the first insulating member is stable, and the two can be integrally formed to facilitate assembly and positioning.
  • one end of the second part away from the second section is in contact with the second insulating member.
  • one end of the second part away from the second section is in contact with the second insulating member, which can restrict the movement of the second insulating member along the thickness direction of the first wall.
  • the second insulating member extends beyond both ends of the second part along a second direction, the second direction is perpendicular to the thickness direction of the first wall and parallel to the first wall. A surface.
  • the second insulating member extends beyond both ends of the second part along the second direction, so that the second part and the first wall have a better insulation effect.
  • the thickness of the first part is greater than the thickness of the third part, and/or the thickness of the second part is greater than the thickness of the third part.
  • the strength of the first part can be enhanced and the welding of the electrical connection components (such as electrode terminals) between the first part and the tabs and the electrode lead-out parts can be reduced.
  • the risk of welding through the first part when welding is sufficient to meet the welding requirements; in an embodiment in which the thickness of the second part is greater than the thickness of the third part, the risk of welding through the second part when the second part is welded to the bus component can be reduced to meet the welding requirements. .
  • both the first part and the second part have a thicker thickness, which can meet the welding requirements and reduce the thickness of the first part and the third part. Risk of the second part being welded through.
  • the first part, the third part and the second part are arranged in sequence along the first direction, and the size of the third part along the second direction is larger than that of the first part along the second direction.
  • the size in the second direction, the size of the third part along the second direction is greater than the size of the second part along the second direction, the first direction, the second direction and the first
  • the thickness direction of the walls is perpendicular to each other.
  • the size of the third part is the largest compared with the first part and the second part, so that the third part can have a larger flow area, so as to Meet overcurrent requirements.
  • the flow cross-sectional area of the first part is S1
  • the flow cross-sectional area of the third part is S2
  • the flow cross-sectional area of the second part is S3; where, 0.2 ⁇ S1/S2 ⁇ 5, 0.2 ⁇ S2/S3 ⁇ 5, 0.2 ⁇ S1/S3 ⁇ 5; preferably, 0.5 ⁇ S1/S2 ⁇ 2, 0.5 ⁇ S2/S3 ⁇ 2, 0.5 ⁇ S1/S3 ⁇ 2.
  • the flow area S1 of the first part, the flow area S2 of the second part, and the flow area S3 of the third part satisfy the above relationship, so that the electrode lead-out member as a whole has better flow capacity.
  • the thickness of the first part is H1, satisfying 0.2mm ⁇ H1 ⁇ 5mm, preferably, 0.5mm ⁇ H1 ⁇ 4mm; or the thickness of the third part is H2, satisfying 0.2mm ⁇ H2 ⁇ 2mm, preferably, 0.3mm ⁇ H2 ⁇ 1.2mm; or the thickness of the second part is H3, satisfying 0.2mm ⁇ H3 ⁇ 5mm, preferably, 0.5mm ⁇ H3 ⁇ 4mm.
  • the thickness H1 of the first part satisfies the above relationship.
  • the first part has better overcurrent capability, the first part is not easy to be welded through; the thickness H2 of the third part satisfies the above relationship, so that the third part If it has a larger flow area, it is easier to bend the third part; the thickness H3 of the second part satisfies the above relationship. If the second part has better flow capacity, the second part is not easy to be welded through. .
  • the battery cell further includes: an electrode terminal, the first wall is provided with an electrode lead-out hole, the electrode terminal is inserted through the electrode lead-out hole, and one end of the electrode terminal is connected to The other end of the electrode lead-out member is electrically connected to the tab of the electrode assembly.
  • the electrode terminal is inserted through the electrode lead-out hole to realize the positioning of the electrode terminal and facilitate the connection between the electrode terminal, the electrode lead-out piece and the tab.
  • the number of the electrode terminals and the number of the electrode lead-out holes are multiple, the electrode terminals correspond to the electrode lead-out holes one-to-one, and the electrode lead-out member is provided with a first Groove, the first groove is located between two adjacent electrode terminals.
  • the number of electrode terminals and the number of electrode lead-out holes are both multiple, which has better overcurrent capability.
  • the first groove can reduce the weight of the electrode lead-out without affecting overcurrent.
  • the first groove extends to an edge of the electrode lead-out piece.
  • the first groove extends to the edge of the electrode lead-out piece, so that the edge of the electrode lead-out piece can be processed with the first groove, thereby reducing processing difficulty.
  • the battery cell further includes: a first insulating member, at least partially disposed between the first wall and the electrode lead-out member to insulate and isolate the first wall and the electrode lead-out member.
  • the first insulating member includes a first protrusion, and the first protrusion is inserted into the first groove.
  • the first wall and the electrode lead-out part are insulated and isolated by the first insulator, so that the first wall and the electrode lead-out part are separated; the first protrusion is inserted into the first groove to facilitate the conduction of the electrode lead-out part. position.
  • the first wall includes a third surface facing away from the interior of the battery cell, the third surface is formed with a second protrusion, and the first insulating member includes a second groove, The second protrusion is inserted into the second groove.
  • the second protrusion cooperates with the second groove to realize the positioning of the first insulating member, thereby facilitating the assembly of the first insulating member and the first wall.
  • the electrode lead-out piece extends beyond an edge of the first wall, and the first surface is located at a portion of the electrode lead-out piece beyond the first wall.
  • the electrode lead-out part extends beyond the edge of the first wall, and when viewed in a direction perpendicular to the bottom wall, the projection of the first surface does not overlap with the first wall, so as to facilitate the electrical connection between the electrode lead-out part and the bus component.
  • the electrode lead-out member includes a first part and a second part, the first part is electrically connected to the tab of the electrode assembly, and the second part is used to connect the bus component, so The second portion extends beyond the edge of the first wall, the second portion extends along the thickness direction of the first wall and protrudes from the first portion, and the first surface is the second portion facing away from the first wall. Describe the surface of the first part.
  • the second part since the second part is used to connect the bus component, the second part exceeds the edge of the first wall, and the first surface is the surface of the second part away from the first part. Therefore, when the bus component is connected to the first surface, The bus part can have a certain distance from the first wall, thereby reducing the risk of interference between the bus part and the first wall, and reducing the risk of short circuit between the bus part and the housing, so as to facilitate the assembly of the bus part and the electrode lead-out piece.
  • a plane on which the first surface is located is perpendicular to the first wall.
  • the plane where the first surface is located is perpendicular to the first wall, which facilitates the electrical connection between the electrode lead-out part and the bus part.
  • the housing includes the first wall and the second wall oppositely arranged along the thickness direction of the first wall, the third wall and the fourth wall oppositely arranged along the first direction, and
  • the fifth wall and the sixth wall are oppositely arranged along the second direction, the area of the third wall and the area of the fourth wall are both smaller than the area of the first wall, and the area of the third wall and the area of the fourth wall are smaller than the area of the first wall.
  • the area of the fourth wall is smaller than the area of the second wall, the area of the fifth wall and the area of the sixth wall are smaller than the area of the first wall, and the area of the fifth wall and the area of the sixth wall are smaller than the area of the first wall.
  • the area of the sixth wall is smaller than the area of the second wall, and the thickness direction of the first wall, the first direction and the second direction are perpendicular to each other.
  • the housing includes a housing and an end cover, the housing has an opening, the end cover closes the opening, and the first wall is the end cover.
  • the first wall is an end cover to facilitate the assembly of the electrode lead-out parts.
  • this application provides a battery, including: a box; a busbar contained in the box; a plurality of battery cells as provided in the above embodiments, accommodated in the box, a plurality of The battery cells are stacked along the thickness direction of the first wall, and the electrode lead-out parts of a plurality of the battery cells are electrically connected through the bus part.
  • the use of the above-mentioned battery cell can improve the assembly efficiency of the electrode lead-out part and the bus part of the battery cell, thereby improving the assembly efficiency of the battery.
  • the projection of the end of the bus part at least partially overlaps the first wall.
  • the projection of the end of the bus component at least partially overlaps the first wall, so as to save assembly space, make the structure of the internal components of the battery compact, and improve the energy density of the battery.
  • the electrode lead-out member is welded to the bus component and forms a soldering area.
  • the size of the first surface is W1
  • the soldering area is W2, which satisfies 0.01 ⁇ W2/W1 ⁇ 0.5, preferably, 0.1 ⁇ W2/W1 ⁇ 0.3.
  • the ratio of the size W2 of the soldering area to the size W1 of the first surface satisfies the above relationship, so that the welding part has better overcurrent capability, higher connection strength, and better safety of the battery cells. If the ratio of the size W2 of the soldering area to the size W1 of the first surface is too small, the overcurrent capacity of the welding part will be poor and the connection strength will be insufficient. When the bus part and the electrode lead-out are laser welded, if the size of the soldering area If the ratio of W2 to the size W1 of the first surface is too large, the local welding position may exceed the second part, causing the local insulation structure to be melted and the safety of the battery cell to be reduced.
  • the size of the first surface is F1
  • the size of the soldering area is F2, satisfying 0.01 ⁇ F2/F1 ⁇ 0.5, preferably, 0.1 ⁇ F2/F1 ⁇ 0.3
  • the second direction is perpendicular to the thickness direction of the first wall and parallel to the first surface.
  • the ratio of the size F2 of the soldering area in the second direction to the size F1 of the first surface in the second direction satisfies the above relationship, so that the welding part has better overcurrent capability, higher connection strength, and better battery cell performance. Body safety is better.
  • the area of the first surface is M1, and the area of the soldering area is M2, satisfying 0.01 ⁇ M1/M2 ⁇ 0.5, preferably, 0.1 ⁇ M1/M2 ⁇ 0.3.
  • the ratio of the area M1 of the first surface to the area M2 of the soldering area satisfies the above relationship.
  • the soldering area has better overcurrent capability, higher connection strength, and better safety of the battery cells.
  • the bus part includes a bottom wall, two side walls and two flanging parts.
  • the two side walls are arranged oppositely along the thickness direction of the first wall, and the bottom wall is connected to Of the two side walls, each flange portion extends from an end of the corresponding side wall away from the bottom wall in a direction away from the other side wall, and the two flange portions are respectively connected with The electrode lead-out parts of the two battery cells are connected.
  • the structure of the bus component facilitates the connection between the bus component and the first surface of the electrode lead-out parts of the two battery cells.
  • the housing further has a second wall disposed opposite to the first wall, and a first area of an edge of the second wall is recessed to form a recess, and the recess is used to accommodate the At least part of the electrode lead-out piece of the battery cell adjacent to the second wall.
  • the recess is arranged to accommodate at least the electrode lead-out parts of the battery cells adjacent to the second wall, making reasonable use of the assembly space, so that the battery has a higher energy density.
  • the electrode lead-out piece extends beyond the edge of the first wall, the first surface is located at a portion of the electrode lead-out piece beyond the first wall, and the bus part is a flat plate structure.
  • the electrode lead-out part exceeds the edge of the first wall, and when viewed in a direction perpendicular to the bottom wall, the projection of the first surface does not overlap with the first wall, so as to facilitate the electrical connection between the electrode lead-out part and the bus component.
  • the bus component structure It is simple, easy to process and manufacture, and has low manufacturing cost.
  • the electrode lead-out piece is at least partially received in the recess of the battery cell adjacent to the first wall, and the electrode lead-out piece includes a first part and a second part,
  • the first part is electrically connected to the tab of the electrode assembly, the second part is used to connect the bus component, the second part exceeds the edge of the first wall, and the second part is along the edge of the first wall.
  • a wall extends in a thickness direction and protrudes from the first part, and the first surface is a surface of the second part facing away from the first part, pointing in the direction of the electrode lead-out member along the first wall, so The second portion extends beyond the recess of the battery cell adjacent to the first wall; and/or the housing includes a housing and an end cap, the housing having an opening, and the end cap closing The opening, the first wall is the end cap, and the projection of the second portion partially overlaps the projection of the housing in a direction perpendicular to the first surface.
  • the electrode lead-out member is at least partially accommodated in the recess of the battery cell adjacent to the first wall, and the second part exceeds the recess of the adjacent battery cell. Therefore, the first surface is within the thickness of the first wall. It can have a larger size in the direction, so that the electrode lead-out part and the first surface have a larger connection area, so that the electrode lead-out part and the bus part are firmly connected.
  • the projection of the second part partially overlaps the projection of the housing, so that the second part has a larger size in the arrangement direction of the end cover and the housing, so that the first surface is
  • the end cover and the housing have a larger area in the arrangement direction, so that the bus part and the electrode lead-out part have a larger connection area, thereby making the bus part and the electrode lead-out part firmly connected.
  • the battery further includes an isolation layer, the isolation layer is disposed on a surface of the electrode lead-out member facing the housing, and the isolation layer is used to insulate and isolate the electrode lead-out member from the housing.
  • the shell is used to insulate and isolate the electrode lead-out member from the housing.
  • the isolation layer is provided to insulate the electrode lead-out member from the shell of the adjacent battery cell or the shell of the battery cell with the electrode lead-out member, thereby improving the safety of the battery.
  • two adjacent electrode lead-out parts of two adjacent battery cells have two ends that are away from each other, and the busbar Two ends of the component are respectively flush with the two end portions; and/or, along the second direction, two opposite ends of the bus component are flush with two opposite ends of the electrode lead-out member, and the The second direction, the thickness direction of the first wall, and the thickness direction of the bus part are two perpendicular to each other.
  • the two ends of the bus part in the thickness direction of the first wall are flush with the two opposite ends of the two adjacent electrode lead-out parts of the two adjacent battery cells, so as to facilitate the
  • the thickness direction of the first wall positions the bus part and the corresponding electrode lead-out piece to facilitate the connection between the bus part and the electrode lead-out part;
  • the opposite ends of the bus part along the second direction are respectively connected with the ends of the electrode lead-out part along the second direction.
  • the two opposite ends are flush, so as to facilitate positioning of the bus component and the corresponding electrode lead-out piece in the second direction, and to facilitate the connection between the bus component and the electrode lead-out piece.
  • the present application provides an electrical device, including the battery cell provided in any of the above embodiments, where the battery cell is used to provide electrical energy.
  • Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • Figure 2 is an exploded view of a battery provided by some embodiments of the present application.
  • Figure 3 is an exploded view of a battery cell provided by some embodiments of the present application.
  • Figure 4 is a perspective view of an electrode lead-out member provided by some embodiments of the present application.
  • Figure 5 is a schematic diagram of the assembly of the electrode lead-out member and the first wall provided by some embodiments of the present application;
  • FIG. 6 is a schematic structural diagram of an electrode lead-out member provided by some embodiments of the present application.
  • FIG. 7 is a schematic structural diagram of an electrode lead-out member provided by some embodiments of the present application.
  • FIG. 8 is a schematic structural diagram of an electrode lead-out member provided by other embodiments of the present application.
  • FIG. 9 is a schematic structural diagram of an electrode lead-out member provided by some embodiments of the present application.
  • FIG. 10 is a schematic structural diagram of an electrode lead-out member provided by some embodiments of the present application.
  • Figure 11 is a schematic structural diagram of a support member, a first insulating member and a second insulating member provided by some embodiments of the present application;
  • Figure 12 is a cross-sectional view of a partial structure of a battery cell provided by some embodiments of the present application.
  • Figure 13 is a side view of an electrode lead-out provided by other embodiments of the present application.
  • Figure 14 is a top view of Figure 13;
  • Figure 15 is a schematic diagram of the first part of the flow cross section provided by some embodiments of the present application.
  • Figure 16 is a schematic diagram of the flow cross section of the third part provided by some embodiments of the present application.
  • Figure 17 is a schematic diagram of the flow cross section of the second part provided by some embodiments of the present application.
  • Figure 18 is a cross-sectional view of a battery cell provided by some embodiments of the present application.
  • Figure 19 is a partial enlarged view of A in Figure 18;
  • Figure 20 is a partial enlarged view of B in Figure 2;
  • Figure 21 is a schematic structural diagram of the return component provided by some embodiments of the present application.
  • Figure 22 is a partial structural schematic diagram of a battery provided by some embodiments of the present application.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • the term “plurality” refers to two or more (including two).
  • the orientation or positional relationship indicated by the technical terms “length”, “width”, “thickness”, “inner”, “outer”, “circumferential”, etc. are based on the orientation or positional relationship shown in the drawings, and only It is intended to facilitate the description of the embodiments of the present application and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly consists of a positive electrode plate, a negative electrode plate and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector.
  • the current collector without the positive electrode active material layer is used as a positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the current collector without the negative electrode active material layer is used as a negative electrode tab.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon. In order to ensure that large currents can pass through without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.
  • the material of the isolation film can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.
  • the battery cell also includes a shell, an electrode terminal and an electrode lead-out piece;
  • the shell includes a shell and an end cover, the shell has an opening, the end cover closes the opening, and the electrode assembly is arranged in the shell; the electrode terminal is passed through the end cover, and the electrode assembly
  • the pole lug is connected to one end of the electrode terminal, and the electrode lead-out member is connected to the other end of the electrode terminal.
  • the electrode lead-out piece is used to lead out the electric energy of the battery cells.
  • the electrode lead-out piece is provided with a through hole through which the power supply terminal passes. The electrode terminal is inserted into the through hole and is riveted with the electrode lead-out piece.
  • the assembly efficiency of batteries is low, which affects the mass production of batteries.
  • the inventor in order to solve the problem of low assembly efficiency of the battery caused by the low assembly efficiency of the bus part and the electrode lead-out part, the inventor has designed a battery cell after in-depth research.
  • the surface where the electrode lead-out part and the bus part are connected is located The plane intersects the first wall to facilitate welding of the bus part and the electrode lead-out part, thereby improving the assembly efficiency of the battery composed of the battery cells.
  • the battery cells disclosed in the embodiments of the present application can be used in, but are not limited to, vehicles, ships, aircraft, and other electrical equipment.
  • the power supply system of the electrical equipment can be composed of battery cells, batteries, etc. disclosed in this application.
  • Embodiments of the present application provide an electrical device that uses a battery as a power source.
  • the electrical device can be, but is not limited to, a mobile phone, a tablet computer, a laptop, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, Spacecraft and more.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • an electrical device is a vehicle 1000 as an example.
  • the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • the battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .
  • the battery 100 can be used to power the vehicle 1000 .
  • the battery 100 can be used as an operating power source for the vehicle 1000 and for the circuit system of the vehicle 1000 , such as for the starting, navigation and operating power requirements of the vehicle 1000 .
  • the vehicle 1000 may also include a controller 200 and a motor 300 .
  • the controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • the battery 100 includes a case 10 and battery cells 20 , and the battery cells 20 are accommodated in the case 10 .
  • the box 10 is used to provide an accommodation space for the battery cells 20, and the box 10 can adopt a variety of structures.
  • the box 10 may include a first sub-box 11 and a second sub-box 12.
  • the first sub-box 11 and the second sub-box 12 cover each other.
  • the first sub-box 11 and the second sub-box 12 are The two sub-boxes 12 jointly define an accommodation space for accommodating the battery cells 20 .
  • the second sub-box 12 can be a hollow structure with one end open, and the first sub-box 11 can be a plate-like structure.
  • the first sub-box 11 is covered with the open side of the second sub-box 12 so that the first sub-box 11 can have a plate-like structure.
  • the box 11 and the second sub-box 12 jointly define an accommodation space; the first sub-box 11 and the second sub-box 12 can also be hollow structures with one side open, and the open side of the first sub-box 11 It is closed on the open side of the second sub-box 12 .
  • the battery 100 there may be a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the plurality of battery cells 20 are connected in series and in parallel.
  • the plurality of battery cells 20 can be directly connected in series or in parallel or mixed together, and then the whole composed of the plurality of battery cells 20 can be accommodated in the box 10 ; of course, the battery 100 can also be a plurality of battery cells 20 First, the battery modules are connected in series, parallel, or mixed to form a battery module, and then multiple battery modules are connected in series, parallel, or mixed to form a whole, and are accommodated in the box 10 .
  • the battery 100 may also include other structures.
  • the battery 100 may further include a bus component 30 for realizing electrical connections between multiple battery cells 20 .
  • the battery cell 20 may be a secondary battery or a primary battery; the battery cell 20 may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • the battery cell 20 includes a casing 21 , an electrode assembly 22 , an electrode lead-out member 23 and an electrode terminal 25 .
  • the housing 21 includes a housing 211 and an end cover 212.
  • the housing 211 has an opening, and the end cover 212 closes the opening to isolate the internal environment of the battery cell 20 from the external environment.
  • the housing 211 is a component used to cooperate with the end cover 212 to form an internal environment of the battery cell 20 , wherein the formed internal environment can be used to accommodate the electrode assembly 22 , electrolyte, and other components. Housing 211 and end cap 212 may be separate components. Housing 211 can be of many shapes and sizes. Specifically, the shape of the housing 211 can be determined according to the specific shape and size of the electrode assembly 22 . The housing 211 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application. The embodiment of this application is introduced by taking the housing 211 as a rectangular parallelepiped as an example.
  • the end cap 212 refers to a component that covers the opening of the housing 211 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap 212 may be adapted to the shape of the housing 211 to fit the housing 211 .
  • the end cap 212 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 212 is less likely to deform when subjected to extrusion and collision, so that the battery cell 20 can have higher durability. Structural strength and safety performance can also be improved.
  • Functional components such as electrode terminals 25 may be provided on the end cap 212 .
  • the electrode terminal 25 may be used to electrically connect with the electrode assembly 22 for outputting or inputting electrical energy of the battery cell 20 .
  • the end cap 212 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • an insulating structure may be provided inside the end cover 212 , and the insulating structure may be used to isolate the electrical connection components in the housing 211 from the end cover 212 to reduce the risk of short circuit.
  • the insulating structure may be plastic, rubber, etc.
  • the electrode assembly 22 is a component in the battery cell 20 where electrochemical reactions occur.
  • One or more electrode assemblies 22 may be contained within the housing 211 .
  • the electrode assembly 22 is mainly formed by winding or stacking a positive electrode piece and a negative electrode piece, and is usually provided with an isolation film between the positive electrode piece and the negative electrode piece. The isolation film is used to separate the positive electrode piece and the negative electrode piece. Avoid internal short circuit between positive and negative electrode pieces.
  • the portions of the positive electrode piece and the negative electrode piece that contain active material constitute the main body of the battery assembly, and the portions of the positive electrode piece and the negative electrode piece that do not contain active material constitute the tabs 221 respectively.
  • the positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively located at both ends of the main body. During the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs 221 are connected to the electrode terminals 25 to form a current loop.
  • the electrode lead-out member 23 is a component for extracting electric energy from the battery cell 20.
  • the electrode lead-out member 23 is connected to the electrode terminal 25, and the busing member 30 (see FIG. 2) is connected to the electrode lead-out member 23.
  • An insulation structure is provided between the electrode lead-out member 23 and the end cover 212 for insulating and isolating the electrode lead-out member 23 and the end cover 212 .
  • FIG. 4 is a perspective view of an electrode lead-out part provided by some embodiments of the present application
  • Figure 5 is a schematic diagram of the assembly of the electrode lead-out part and the first wall provided by some embodiments of the present application.
  • the present application provides a battery cell 20 .
  • the battery cell 20 includes a housing 21 , an electrode assembly 22 and an electrode lead-out member 23 .
  • the housing 21 has a first wall 213, the electrode assembly 22 is disposed in the housing 21, and the electrode lead-out part 23 is installed on the first wall 213; the electrode lead-out part 23 is used to lead out the electric energy of the electrode assembly 22.
  • the electrode lead-out member 23 includes a first surface 23b. The plane where the first surface 23b is located intersects the first wall 213. The first surface 23b is used to connect with the bus component 30 (see FIG. 2).
  • the first wall 213 is a wall of the housing 21 .
  • the first wall 213 and other walls form an accommodating space of the housing 21 , and the electrode assembly 22 is disposed in the accommodating space.
  • the direction indicated by letter Z is the thickness direction of the first wall 213 .
  • the first surface 23 b is a surface of the electrode lead-out member 23 for connection with the bus part 30 .
  • the plane where the first surface 23b is located intersects the first wall 213.
  • the plane where the first surface 23b is located may be parallel to the thickness direction Z of the first wall 213, or the plane where the first surface 23b is located may be parallel to the first wall 213.
  • the thickness direction Z is set obliquely.
  • the angle ⁇ between the plane where the first surface 23b is located and the first wall 213 is 60°-120°; preferably, the angle ⁇ between the plane where the first surface 23b is located and the first wall 213 is 85°.
  • the plane where the first surface 23b is located can be perpendicular to the first wall 213, that is, the plane where the first surface 23b is located can be parallel to the thickness direction Z of the first wall 213, so that the first surface 23b Connected to bus part 30.
  • the first surface 23 b is the surface of the electrode lead-out member 23 closest to the edge of the first wall 213 in the length direction of the battery cell 20 .
  • the electrode lead-out member 23 may have a block structure, and the first surface 23 b of the electrode lead-out member 23 is used to connect with the bus component 30 .
  • the plane where the first surface 23b is located intersects the first wall 213, so as to facilitate the welding of the bus part 30 and the electrode lead-out part 23, and improve the assembly of the bus part 30 and the electrode lead-out part 23. Convenience, thereby improving the assembly efficiency of the battery 100 composed of the battery cells 20.
  • the bus part 30 and the electrode lead-out part 23 can be welded in a direction parallel to the first wall 213, thereby improving assembly convenience.
  • the plane where the first surface 23b is located is perpendicular to the first wall 213 .
  • the perpendicularity of the plane where the first surface 23b is located to the first wall 213 means that the angle ⁇ between the plane where the first surface 23b is located and the first wall 213 is approximately equal to 90°.
  • the angle ⁇ may be 85°. ° ⁇ 95°.
  • the angle ⁇ may be 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94° or 95°.
  • the electrode lead-out member 23 also includes a second surface 23a.
  • the plane where the second surface 23a is located intersects the first surface 23b.
  • the area of the second surface 23a is D1.
  • the area of the first surface 23b is D2, and satisfies 0.1 ⁇ D2/D1 ⁇ 10.
  • the area of the second surface 23a is the area of the second surface 23a excluding the grooves, through holes or step holes.
  • the first surface 23b is a plane, and the area of the first surface 23b is the area of the plane.
  • the first surface 23b is the surface of the electrode lead-out member 23 used to fit with the bus component.
  • the ratio of the area D2 of the first surface 23b to the area D1 of the second surface 23a satisfies the above relationship, and can take into account the energy density and flow area of the battery 100.
  • D2/D1 ⁇ 0.1 D2 is too small, and the welding area between the bus part 30 and the electrode lead-out part 23 is too small, affecting the overcurrent capability; or, D1 is too large, and the electrode lead-out part 23 is at a thickness perpendicular to the first wall 213
  • the area occupied in the direction Z is too large, occupying the space of the electrode assembly 22 and affecting the energy density.
  • the second surface 23 a is a surface of the electrode lead-out member 23 located outside the housing 21 , and the second surface 23 a protrudes from the first wall 213 along the thickness direction Z of the first wall 213 .
  • the electrode is drawn out
  • the welding area between the member 23 and the busing member 30 and the welding area between the electrode lead-out member 23 and the electrode terminal can be further ensured, the overcurrent capability is better, and the area occupied by the electrode lead-out member 23 is smaller, and the energy density of the battery 100 is greater.
  • the size of the first surface 23b is W1, satisfying 1mm ⁇ W1 ⁇ 10mm, preferably, 2mm ⁇ W1 ⁇ 5mm.
  • the size W1 of the first surface 23b satisfies the above relationship, so that the first surface 23b and the bus part 30 can have a larger connection area, so that the first surface 23b and the bus part 30 can have a larger connection area.
  • the busbar 30 is connected.
  • the electrode lead-out member 23 also includes a second surface 23a.
  • the plane where the second surface 23a is located intersects the first surface 23b.
  • the electrode lead-out member 23 is disposed on the first surface.
  • the electrode lead-out member 23 On the side of the wall 213 facing away from the inside of the battery cell 20 (see FIG. 3 ), the electrode lead-out member 23 includes a first part 231 and a second part 232 .
  • the first part 231 is electrically connected to the tab 221 of the electrode assembly 22
  • the second part 232 is used to connect the bus part 30 (see FIG. 2 )
  • the second surface 23a is the surface of the first part 231 away from the first wall 213
  • the first surface 23b is the surface of the second part 232 .
  • the first part 231 and the second part 232 are two components of the electrode lead-out part 23 .
  • the first part 231 and the second part 232 realize the electrical connection between the electrode lead-out part 23 , the tab 221 and the bus component 30 .
  • the electrode lead-out part 23 is disposed on the side of the first wall 213 away from the inside of the battery cell 20 to facilitate the connection between the electrode lead-out part 23 and the bus part 30; the first part 231 and the second part 232 are respectively used to achieve The first part 231 and the tab 221 can be connected through the electrode terminal 25 (see FIG. 3 ), which is beneficial to increasing the connection area between the electrode lead-out part 23 and the electrode terminal 25 and the electrode lead-out part 23 The connection area with the bus part 30.
  • the battery cell 20 also includes an electrode terminal 25.
  • the first wall 213 is provided with an electrode lead-out hole 2131.
  • One end of the electrode terminal 25 is connected to the first part 231.
  • the electrode terminal The other end of 25 is electrically connected to the tab 221 of the electrode assembly 22 through the electrode lead-out hole 2131.
  • the other end of the electrode terminal 25 can be electrically connected to the tab 221 of the electrode assembly 22 through the electrode lead-out hole 2131.
  • the electrode terminal 25 can be inserted through the electrode lead-out hole 2131, and the end of the electrode terminal 25 close to the inside of the housing 21 is connected to the electrode.
  • the tabs 221 of the assembly 22 are electrically connected; alternatively, the adapter 26 is inserted through the electrode lead-out hole 2131 , and the electrode terminal 25 is electrically connected to the tab 221 of the electrode assembly 22 through the adapter that is inserted through the electrode lead-out hole 2131 .
  • the first part 231 and the tabs 221 of the electrode assembly 22 are electrically connected through the electrode terminals 25 to guide the electric energy of the electrode assembly 22 to the electrode lead-out part 23 so that the electrode lead-out part 23 can lead out the electric energy of the electrode assembly 22 .
  • At least part of the second part 232 extends beyond the first part 231 along the thickness direction Z of the first wall 213 .
  • At least a part of the second part 232 exceeds the first part 231 . It may be that a part of the second part 232 exceeds the first part 231 , or the entire second part 232 may exceed the first part 231 .
  • the first part 231 may be perpendicular to the second part 232, that is, the angle between the first part 231 and the second part 232 may be 90°; or the first part 231 and the second part 232 may also be arranged at an angle, and the first part 231
  • the angle with the second portion 232 may also be an acute angle or an obtuse angle.
  • the second part 232 can be implemented in a variety of ways beyond the first part 231 .
  • the second part 232 is formed by extending from the first part 231 in a direction away from the first wall 213 .
  • the electrode lead-out member 23 is generally in the shape of " ⁇ " shape; the horizontal segment of " ⁇ ” is the first part 231, and the vertical segment of " ⁇ " is the second part 232.
  • the second part 232 may also be formed by extending from the first part 231 in a direction close to the first wall 213 .
  • the electrode lead-out member 23 is generally in the shape of “ ⁇ ”; the horizontal section of the “ ⁇ ” is the first part 231 , the vertical segment of “ ⁇ ” is the second part 232.
  • the first portion 231 extends beyond the first wall 213 in a direction in which the first portion 231 approaches the second portion 232
  • the second portion 232 extends from a portion of the first portion 231 beyond the first wall 213 in a direction approaching the first wall 213 .
  • the second part 232 is outside the housing 21, and the connection with the busbar is more convenient.
  • the projection of the second part 232 partially overlaps with the projection of the housing 211, that is, the housing 21 includes the housing 211 and the end cover 212, the first The wall 213 is the end cover 212.
  • the second part 232 partially overlaps the housing 211.
  • the above solution can increase the size of the second part 232, thereby increasing the area of the first surface 23b, which is convenient. Welding of the busbar 30.
  • the bus part 30 is a flat plate structure.
  • the second part 232 may also extend from the first part 231 in a direction close to the first wall 213 and in a direction away from the first wall 213 .
  • the electrode lead-out member 23 is generally in the shape of “ ⁇ ”.
  • the horizontal segment of “ ⁇ ” is the first part 231
  • the vertical segment of “ ⁇ ” is the second part 232.
  • the second part 232 extends outside the housing 21, making the connection with the bus part more convenient and the first surface 23b having a larger weldable area.
  • the projection of the second part 232 partially overlaps the projection of the housing 211 , and points in the direction of the electrode lead-out 23 along the first wall 213 , and the second part 232 partially overlaps with the projection of the housing 211 .
  • the portion 232 exceeds the recess 2141 of the battery cell 20 adjacent to the first wall 213.
  • the above solution can increase the size of the second portion 232, thereby increasing the area of the first surface 23b and facilitating the welding of the bus 30.
  • the bus part 30 is a flat plate structure.
  • the second part 232 is formed by extending from the middle part of the first part 231 in a direction away from the first wall 213.
  • the electrode lead-out member 23 is generally in the shape of a " ⁇ ", and the horizontal section of the " ⁇ ” is the first part 231.
  • the vertical segment of “ ⁇ ” is the second part 232.
  • At least part of the second part 232 extends beyond the first part 231 along the thickness direction Z of the first wall 213 to increase the area of the first surface 23b to facilitate and increase the connection between the second part 232 and the bus part 30 area.
  • the electrode lead-out member 23 exceeds the edge of the first wall 213 , and the first surface 23 b is located at a portion of the electrode lead-out member 23 that exceeds the first wall 213 .
  • a portion of the electrode lead-out member 23 extends beyond the edge of the first wall 213 .
  • a portion of the projection of the electrode lead-out member 23 is located outside the first wall 213 .
  • the first surface The projection of 23b does not overlap with the first wall 213, so as to facilitate the electrical connection between the electrode lead-out part 23 and the bus part 30.
  • the manifold component 30 can be a flat plate structure, and the structure of the manifold component 30 is simple to facilitate processing and manufacturing.
  • the electrode lead-out member 23 includes a first part 231 and a second part 232.
  • the first part 231 is electrically connected to the tab 221 of the electrode assembly 22, and the second part 232 is used to connect the bus component 30.
  • 232 extends beyond the edge of the first wall 213
  • the second portion 232 extends along the thickness direction Z of the first wall 213 and protrudes from the first portion 231
  • the first surface 23b is the surface of the second portion 232 facing away from the first portion 231 .
  • the second part 232 and the first part 231 are arranged in a direction parallel to the first wall 213, along the thickness direction Z of the first wall 213, and the projection of the second part 232 does not overlap with the first wall 213.
  • the first surface 23b is the surface of the second part 232 away from the first part 231. Therefore, when the bus part 30 and the first surface When connecting 23b, the bus component 30 can be at a certain distance from the first wall 213, thereby reducing the risk of interference between the bus component 30 and the first wall 213, and reducing the risk of short circuit between the bus component 30 and the housing 21, so as to facilitate the connection between the bus component 30 and the first wall 213. Assembly of the electrode lead-out piece 23.
  • the first part 231 and the second part 232 are arranged along the first direction X, and the first surface 23b is the second part 232 facing away from the first part 231 along the first direction X. surface, the first direction X is perpendicular to the thickness direction Z of the first wall 213 .
  • the direction indicated by the letter X is the first direction, and the first direction X may be the length direction of the battery cell 20 .
  • the first direction X is perpendicular to the first surface 23b.
  • the first surface 23b is the surface of the electrode lead-out member 23 closest to the edge of the first wall 213 in the first direction X.
  • the second part 232 may be closer to the edge of the first wall 213 relative to the first part 231 to facilitate the connection between the bus part 30 and the electrode lead-out part 23 .
  • the first part 231 and the second part 232 are arranged along the first direction X, and the first surface 23b is the surface of the second part 232 away from the first part 231 along the first direction assembly.
  • the first portion 231 is parallel to the first wall 213 .
  • the first part 231 is parallel to the first wall 213 , that is, the thickness direction of the first part 231 is parallel to the thickness direction Z of the first wall 213 .
  • the first portion 231 is parallel to the flatter portion of the first wall 213 with a larger area.
  • the first part 231 being parallel to the first wall 213 also means that the first part 231 is opposite to the first wall 213 , or that the largest surface of the first part 231 is opposite to the first wall 213 , which does not mean that the first part 231 is arranged along the first wall 213 . Both surfaces disposed in the thickness direction Z of the wall 213 should be parallel to the first wall 213 .
  • the first part 231 is parallel to the first wall 213, which facilitates the assembly of the first part 231.
  • At least part of the second portion 232 extends in a direction away from the first wall 213 and beyond the second surface 23a.
  • At least part of the second part 232 may exceed the second surface 23a.
  • a part of the second part 232 may exceed the second surface 23a, or the entire second part 232 may exceed the second surface 23a.
  • the second part 232 may be perpendicular to the plane where the second surface 23a is located, that is, the angle between the second part 232 and the second surface 23a may be 90°; or, the second part 232 and the plane where the second surface 23a is located It can also be arranged at an angle, and the angle between the second portion 232 and the plane where the second surface 23a is located can also be an acute angle or an obtuse angle.
  • At least part of the second part 232 extends beyond the second surface 23a along the thickness direction Z of the first wall 213, so that at least part of the second part 232 is located on a side of the second surface 23a away from the first wall 213 to reduce The second part 232 interferes with the first wall 213 when connected to the bus part 30 .
  • the electrode lead-out member 23 further includes a third part 233 , and the third part 233 connects the first part 231 and the second part 232 .
  • the third part 233 is also an integral part of the electrode lead-out part 23 .
  • the third part 233 connects the first part 231 and the second part 232.
  • the third part 233 may be integrally formed with the first part 231 and the second part 232, or the third part 233 may be fixed to the first part 231 and the second part.
  • 232 for example, the third part 233 is welded to the first part 231 and the second part 232.
  • the first part 231 , the third part 233 and the second part 232 are integrally formed, for example, the first part 231 , the third part 233 and the second part 232 are stamped or bent.
  • the third part 233 connects the first part 231 and the second part 232 so that there can be a certain distance between the first part 231 and the second part 232 to facilitate the connection of the electrode lead-out part 23 and the bus part 30 .
  • the third portion 233 includes a first section 2331 and a second section 2332 , the first section 2331 moving from the first section 231 toward away from the first wall 213 (see Extending in the direction of Figure 3), the second section 2332 connects the first section 2331 and the second part 232, and a gap is formed between the first section 2331 and the second part 232.
  • the first section 2331 and the second section 2332 are two components of the third part 233.
  • the first section 2331 extends from the first part 231 toward the direction of the first wall 213 , that is, the first section 2331 is located on the side of the first part 231 away from the first wall 213 .
  • the second section 2332 connects the first section 2331 and the second part 232, and a gap is formed between the first section 2331 and the second part 232. That is, at least part of the second section 2332 is located between the first section 2331 and the second part 232. between.
  • a gap is formed between the first section 2331 and the second section 232 so that the electrode lead-out member 23 can be deformed to absorb the expansion stress generated when the battery cell 20 expands.
  • the second portion 232 extends from the second section 2332 in a direction close to the first wall 213 (see Figure 3). Segment 2332 and second portion 232 form a U-shaped structure.
  • the second part 232 extends from the second section 2332 in a direction close to the first wall 213.
  • the second part 232 may be parallel to the first section 2331, or the second part 232 may be arranged obliquely to the first section 2331.
  • the second section 232 is parallel to the first section 2331.
  • the first section 2331, the second section 2332 and the second part 232 form a U-shaped structure, which is simple in structure and easy to form.
  • Figure 11 is a schematic structural diagram of a support member, a first insulating member and a second insulating member provided by some embodiments of the present application.
  • Figure 12 is a schematic diagram of a support member provided by some embodiments of the present application. Cross-sectional view of part of the structure of a battery cell.
  • the battery cell 20 further includes a support member 241 inserted in the gap.
  • the support member 241 is inserted into the gap, and the support member 241 can support the second part 232 when the manifold component 30 is connected to the second part 232 to facilitate the connection between the second part 232 and the manifold component 30 .
  • the support member 241 When the support member 241 is inserted into the gap, the support member 241 may be in contact with the surface of the first section 2331 that encloses the gap, or the support member 241 may be in contact with the surface of the second portion 232 that encloses the gap, or the support Piece 241 may be in contact with a gap-enclosing surface of first section 2331 and in contact with a gap-enclosing surface of second portion 232 .
  • two opposite sides of the support member 241 are in contact with the first section 2331 and the second section 232 respectively.
  • two opposite surfaces of the support member 241 located in the gap are respectively in contact with the surface of the first section 2331 that encloses the gap and the surface of the second section 232 that encloses the gap.
  • the support member 241 is in contact with the first section 2331 and the second part 232 .
  • the support member 241 can play a position-limiting role and limit the positional movement of the second part 232 so as to facilitate a stable connection between the second part 232 and the bus 30 .
  • the support member 241 is made of insulating material.
  • the support member 241 extends beyond both ends of the third part 233 along the second direction Y.
  • the second direction Y is perpendicular to the thickness direction Z of the first wall 213 and parallel to First surface 23b.
  • the direction indicated by the letter Y is the second direction, and the second direction Y may be the width direction of the battery cell 20 .
  • the support member 241 can be plastic, rubber, etc.
  • the support member 241 is made of insulating material, and the support member 241 extends beyond both ends of the third part 233 along the second direction Y, thus having a better insulation effect.
  • the battery cell 20 further includes a first insulating member 242 , at least part of the first insulating member 242 is disposed between the first wall 213 and the first part 231 The first wall 213 and the first part 231 are separated by insulation.
  • the material of the first insulating member 242 may be plastic, rubber, etc.
  • At least part of the first insulating member 242 is disposed between the first wall 213 and the first part 231. It may be that a part of the first insulating member 242 is disposed between the first wall 213 and the first part 231, or it may also be the first insulating member 242.
  • the member 242 is integrally disposed between the first wall 213 and the first portion 231 .
  • At least part of the first insulating member 242 is disposed between the first wall 213 and the first part 231 to separate the first wall 213 and the first part 231, thereby improving the safety of the battery cell 20.
  • the support member 241 is connected to the first insulating member 242 .
  • the support member 241 is connected to the first insulating member 242.
  • the support member 241 and the first insulating member 242 may be integrally formed.
  • the support member 241 and the first insulating member 242 may be thermoplastically formed.
  • the support member 241 and the first insulating member 242 may be formed by thermoplastic molding.
  • the insulating member 242 is snap-fitted, bonded, etc.
  • the supporting member 241 is connected to the first insulating member 242 so that the connection between the supporting member 241 and the first insulating member 242 is stable, so that the supporting member 241 supports the second part 232 .
  • the first insulating member 242 extends beyond both ends of the first part 231 along the second direction Y, which is perpendicular to the thickness direction Z of the first wall 213 and parallel to the first surface 23b.
  • the first insulating member 242 extends beyond both ends of the first part 231 along the second direction Y, so that the first part 231 and the first wall 213 have a better insulation effect.
  • the battery cell 20 further includes a second insulating member 243 , at least part of the second insulating member 243 is disposed between the second part 232 and the first wall 213 Thereby, the second part 232 and the first wall 213 are separated by insulation.
  • the material of the second insulating member 243 may be plastic, rubber, etc.
  • At least part of the second insulating member 243 is disposed between the second part 232 and the first wall 213. It may be that a part of the second insulating member 243 is disposed between the second part 232 and the first wall 213, or it may be a third insulating member 243.
  • the two insulating members 243 are integrally disposed between the second part 232 and the first wall 213 .
  • the second insulating member 243 is disposed between the second part 232 and the first wall 213 to insulate and separate the second part 232 and the first wall 213, thereby improving the safety of the battery cell 20.
  • the second insulating part 243 is connected to the first insulating part 242 .
  • the second insulating member 243 is connected to the first insulating member 242.
  • the second insulating member 243 and the first insulating member 242 may be integrally formed.
  • the second insulating member 243 and the first insulating member 242 may be thermoplastically formed, or they may be The second insulating member 243 and the first insulating member 242 are clipped, bonded, or the like.
  • the second insulating member 243 is connected to the first insulating member 242.
  • the connection between the second insulating member 243 and the first insulating member 242 is stable, and the two can be integrally formed to facilitate assembly and positioning.
  • one end of the second part 232 away from the second section 2332 is in contact with the second insulating member 243 .
  • One end of the second part 232 away from the second section 2332 is in contact with the second insulating member 243 and can restrict the movement of the second insulating member 243 along the thickness direction Z of the first wall 213 .
  • the second insulating member 243 extends beyond both ends of the second portion 232 along the second direction Y, which is perpendicular to the thickness direction Z of the first wall 213 and parallel to the first surface 23b.
  • the second insulating member 243 extends beyond both ends of the second part 232 along the second direction Y, so that the second part 232 and the first wall 213 have a better insulation effect.
  • FIG. 13 is a schematic structural diagram of an electrode lead-out member provided by other embodiments of the present application.
  • the thickness of the first part 231 is greater than the thickness of the third part 233
  • the thickness of the second part 232 is greater than the thickness of the third part 233 .
  • the size indicated by letter H1 is the thickness of the first part 231
  • the size indicated by letter H2 is the thickness of the third part 233
  • the size indicated by letter H3 is the thickness of the second part 232.
  • the thickness direction of the first part 231, the thickness direction of the second part 232, and the thickness direction of the third part 233 are all parallel to the thickness direction Z of the first wall 213; after the electrode lead-out part 23 is bent, , the structure formed by the second part and the third part 233 is U-shaped, so the thickness direction of the third part 233 changes accordingly.
  • the thickness of the first part 231 mentioned here refers to the thickness of the position where the first part 231 is not provided with structures such as grooves, through holes or step holes.
  • the thickness of the first part 231 is greater than the thickness of the third part 233 , the thickness of the first part 231 is larger, which can enhance the strength of the first part 231 and reduce the friction between the first part 231 and the tab 221 and the electrode lead-out 23 .
  • the risk of welding through the first part 231 during welding of electrical connection components (such as electrode terminals 25) meets the welding requirements.
  • the thickness of the second part 232 is greater than the thickness of the third part 233, the thickness of the second part 232 is larger, which can reduce the risk of welding through the second part 232 when the second part 232 is welded to the bus component 30, and satisfies Welding needs.
  • both the first part 231 and the second part 232 have a thicker thickness, which can meet the needs of welding. requirements to reduce the risk of the first part 231 and the second part 232 being welded through.
  • Figure 13 Please refer to Figure 13, and further refer to Figure 14, which is a top view of Figure 13.
  • the first part 231, the third part 233 and the second part 232 are arranged in sequence along the first direction X, and the size of the third part 233 along the second direction Y is larger than the size of the first part 231 along the second direction Y.
  • Size, the size of the third part 233 along the second direction Y is larger than the size of the second part 232 along the second direction Y
  • the first direction X, the second direction Y and the thickness direction Z of the first wall 213 are two perpendicular to each other.
  • the first direction X is the arrangement direction of the first part 231, the third part 233 and the second part 232.
  • the size indicated by the letter L1 is the size of the first part 231 along the second direction Y
  • the size indicated by the letter L3 is the size of the third part 233 along the second direction Y
  • the size indicated by the letter L2 is the size of the second part.
  • the third part 233 has the largest size, which enables the third part 233 to have a larger flow area to meet the flow requirements.
  • Figure 15 is a schematic diagram of the first part of the flow cross section provided by some embodiments of the present application
  • Figure 16 is a third part of the flow section provided by some embodiments of the present application.
  • Figure 17 is a schematic diagram of the second part of the flow cross section provided by some embodiments of the present application.
  • the flow cross-sectional area of the first part 231 is S1
  • the flow cross-sectional area of the third part 233 is S2
  • the flow cross-sectional area of the second part 232 is S3; where, 0.2 ⁇ S1/S2 ⁇ 5, 0.2 ⁇ S2/S3 ⁇ 5, 0.2 ⁇ S1/S3 ⁇ 5; preferably, 0.5 ⁇ S1/S2 ⁇ 2, 0.5 ⁇ S2/S3 ⁇ 2, 0.5 ⁇ S1/S3 ⁇ 2.
  • the ratio S1/S2 of the flow cross-sectional area S1 of the first part 231 to the flow cross-sectional area S2 of the third part 233 may be 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 ,5 etc.
  • the ratio S2/S3 of the flow cross-sectional area S2 of the third part 233 to the flow cross-sectional area S3 of the second part 232 may be 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, etc.
  • the ratio S1/S3 of the flow cross-sectional area S1 of the first part 231 to the flow cross-sectional area S3 of the second part 232 may be 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 ,5 etc.
  • H4 is the size of the second part 232 in the thickness direction Z parallel to the first wall 213 .
  • the flow area S1 of the first part 231, the flow area S2 of the second part 232, and the flow area S3 of the third part 233 satisfy 0.2 ⁇ S1/S2 ⁇ 5, 0.2 ⁇ S2/S3 ⁇ 5, 0.2 ⁇ S1/S3 ⁇ 5, so that the electrode lead-out member 23 as a whole has better overcurrent capability.
  • the thickness of the first part 231 is H1, satisfying 0.2mm ⁇ H1 ⁇ 5mm, preferably, 0.5mm ⁇ H1 ⁇ 4mm; or the thickness of the third part 233 is H2, satisfying 0.2mm ⁇ H2 ⁇ 2mm, preferably, 0.3mm ⁇ H2 ⁇ 1.2mm; or the thickness of the second part 232 is H3, satisfying 0.2mm ⁇ H3 ⁇ 5mm, preferably, 0.5mm ⁇ H3 ⁇ 4mm.
  • the thickness H1 of the first part 231 may be 0.2mm, 0.25mm, 0.5mm, 0.75mm, 1mm, 1.25mm, 1.5mm, 1.75mm, 2mm, 2.25mm, 2.5mm, 2.75mm, 3mm, 3.25mm , 3.5mm, 3.75mm, 4mm, 4.25mm, 4.5mm, 4.75mm, 5mm, etc.
  • the thickness H2 of the third part 233 may be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm , 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc.
  • the thickness H3 of the second part 232 may be 0.2mm, 0.25mm, 0.5mm, 0.75mm, 1mm, 1.25mm, 1.5mm, 1.75mm, 2mm, 2.25mm, 2.5mm, 2.75mm, 3mm, 3.25 mm, 3.5mm, 3.75mm, 4mm, 4.25mm, 4.5mm, 4.75mm, 5mm, etc.
  • the thickness H1 of the first part 231 satisfies the above relationship.
  • the first part 231 has better overcurrent capability, the first part 231 is not easily welded through, which improves the assembly safety of the battery 100;
  • the thickness H2 of the third part 233 satisfies the above relationship.
  • the relationship allows the third part 233 to have a larger flow area, which facilitates the bending of the third part 233;
  • the thickness H3 of the second part 232 satisfies the above relationship, and the second part 232 has better flow capacity.
  • the second part 232 is not easily welded through, which improves the assembly safety of the battery 100 .
  • the thickness H1 of the first part 231 is not easy to be welded through, and the battery 100 has higher safety when assembled; compared with 4mm ⁇ H1 ⁇ 5mm , when 0.5mm ⁇ H1 ⁇ 4mm, the first part 231 occupies a smaller space in the thickness direction Z of the first wall 213, so that the battery 100 has a higher energy density.
  • the thickness H2 of the third part 233 is thicker and is not easy to break; compared with 1.2mm ⁇ H2 ⁇ 2mm, when 0.3mm ⁇ H2 ⁇ When 1.2 mm, the thickness H2 of the third part 233 is thin and easy to bend, which facilitates the bending of the third part 233.
  • the thickness H3 of the second part 232 is not easy to be welded through, and the battery 100 has higher safety when assembled; compared with 4mm ⁇ H3 ⁇ 5mm, when 0.5mm ⁇ H3 ⁇ 4mm, the second part 232 occupies less space in the direction perpendicular to the first surface 23b, reducing costs.
  • the battery cell 20 further includes an electrode terminal 25.
  • the first wall 213 is provided with an electrode lead-out hole 2131.
  • the electrode terminal 25 is inserted through the electrode lead-out hole 2131.
  • the electrode terminal One end of the electrode terminal 25 is connected to the electrode lead-out member 23 , and the other end of the electrode terminal 25 is electrically connected to the tab 221 of the electrode assembly 22 .
  • the electrode terminal 25 is a conductive component, and the electrode terminal 25 can be a cylinder to facilitate processing and manufacturing. Alternatively, the electrode lead-out hole 2131 may be a circular hole.
  • the electrode terminal 25 is disposed through the electrode lead-out hole 2131 to facilitate the connection between the electrode terminal 25 and the electrode lead-out part 23 .
  • the number of electrode terminals 25 and the number of electrode lead-out holes 2131 are multiple.
  • the electrode terminals 25 correspond to the electrode lead-out holes 2131 one-to-one, and the electrode lead-out parts 23
  • a first groove 234 is provided, and the first groove 234 is located between two adjacent electrode terminals 25 .
  • the number of electrode terminals 25 and the number of electrode lead-out holes 2131 are both two.
  • the first groove 234 is a recessed portion of the electrode lead-out member 23 , which can reduce the weight of the electrode lead-out member 23 .
  • the number of electrode terminals 25 and the number of electrode lead-out holes 2131 are multiple, which has better overcurrent capability.
  • the first groove 234 can reduce the weight of the electrode lead-out member 23 without affecting overcurrent.
  • the first groove 234 extends to the edge of the electrode lead-out 23 .
  • the electrode lead-out member 23 includes a second surface 23a, a fifth surface 23c facing the first insulating member 242, and a side surface 23d.
  • the second surface 23a is disposed away from the first wall 213.
  • the second surface 23a and the fifth surface 23c are the electrode lead-out member 23.
  • Two surfaces that are oppositely arranged along the thickness direction Z of the first wall 213, and the side surface 23d of the electrode lead-out member 23 connects the second surface 23a and the fifth surface 23c.
  • the first groove 234 is formed by the fifth surface 23c being recessed toward the second surface 23a.
  • the extension of the first groove 234 to the edge of the electrode lead-out member 23 means that the first groove 234 extends to the side surface 23d of the electrode lead-out member 23 .
  • the first groove 234 extends to the edge of the electrode lead-out part 23, so that the edge of the electrode lead-out part 23 can be processed with the first groove 234, thereby reducing the difficulty of processing.
  • the first groove 234 penetrates the electrode lead-out member 23 along the thickness direction of the electrode lead-out member 23 to reduce the weight of the electrode lead-out member 23 .
  • Figure 18 is a cross-sectional view of a battery cell provided by some embodiments of the present application
  • Figure 19 is a partial enlarged view of A in Figure 18.
  • the battery cell 20 further includes a first insulating member 242, and at least part of the first insulating member 242 is disposed between the first wall 213 and the electrode lead-out member 23 to insulate and isolate the first wall 213 and the electrode.
  • the lead-out member 23 and the first insulating member 242 include a first protrusion 2421, and the first protrusion 2421 is inserted into the first groove 234.
  • the first insulating member 242 includes a sixth surface 242a facing away from the first wall 213 and a seventh surface 242b facing the first wall 213.
  • the first protrusion 2421 protrudes from the sixth surface 242a.
  • the first wall 213 and the electrode lead-out part 23 are insulated and isolated by the first insulator 242, so that the first wall 213 is separated from the electrode lead-out part 23; the first protrusion 2421 is inserted in the first groove 234, In order to facilitate the positioning of the electrode lead-out member 23.
  • the first wall 213 includes a third surface 213a facing away from the interior of the battery cell 20, and the third surface 213a is formed with a second protrusion 2132 to strengthen the first wall 213. strength.
  • the first insulating member 242 includes a second groove 2422, and the second protrusion 2132 is inserted in the second groove 2422.
  • the first wall 213 also includes a fourth surface (not shown in the figure) facing the inside of the battery cell 20 .
  • the third surface 213 a and the fourth surface are two opposite surfaces in the thickness direction Z of the first wall 213 .
  • the protrusion 2132 protrudes from the third surface 213a.
  • the second groove 2422 is provided on the seventh surface 242b.
  • the second protrusion 2132 cooperates with the second groove 2422 to realize the positioning of the first insulating member 242 and facilitate the assembly of the first insulating member 242 and the first wall 213 .
  • the second groove 2422 may be a through hole.
  • the second groove 2422 and the first protrusion 2421 are provided correspondingly in the thickness direction Z of the first wall 213 to rationally utilize the space of the first insulating member 242 .
  • the battery cell 20 further includes an adapter 26 , and the electrode lead-out part 23 can be electrically connected to the tab 221 through the electrode terminal 25 and the adapter 26 .
  • the tab 221 is connected to the adapter 26
  • the adapter 26 is connected to the electrode terminal 25
  • the electrode terminal 25 is connected to the electrode lead 23 , thereby realizing the electrical connection between the tab 221 and the electrode lead 23 . connect.
  • the battery cell 20 further includes a third insulating member 27 .
  • the third insulating member 27 is disposed on the side of the first wall 213 facing the inside of the battery cell 20 .
  • the third insulating member 27 is disposed on the first wall 213 . 213 and the adapter 26 are used to insulate the first wall 213 and the electrode terminal 25 .
  • the battery cell 20 may not include the adapter 26 , in which case the tabs are connected to the electrode terminals.
  • the housing 21 includes a first wall 213 and a second wall 214 that are oppositely arranged along the thickness direction Z of the first wall 213, and a third wall and a fourth wall that are oppositely arranged along the first direction X, And the fifth wall and the sixth wall are arranged oppositely along the second direction Y, the area of the third wall and the area of the fourth wall are both smaller than the area of the first wall 213, and the area of the third wall and the area of the fourth wall are both smaller than The areas of the second wall, the fifth wall and the sixth wall are all smaller than the area of the first wall 213. The areas of the fifth wall and the sixth wall are all smaller than the area of the second wall 214.
  • the first direction, The second direction is perpendicular to the thickness direction of the first wall.
  • the first wall 213 is the wall with the largest area among all the walls of the housing 21 .
  • the battery cell 20 may be in the shape of a rectangular parallelepiped, and the first wall 213 may be the wall with the largest area among all the walls of the battery cell 20 . In other words, the large surface of the battery cell 20 is set as the first wall 213 .
  • the thickness direction Z of the first wall 213 may be the thickness direction of the battery cell 20 .
  • the area of the wall is, and when viewed in a direction perpendicular to the wall, the projected area of the wall is the area of the wall.
  • the housing 21 includes a housing 211 and an end cover 212.
  • the housing 211 has an opening
  • the end cover 212 closes the opening
  • the first wall 213 is the end cover 212.
  • the first wall 213 is an end cap 212 to facilitate the assembly of the electrode lead-out part 23 .
  • Figure 20 is a partial enlarged view of B in Figure 2
  • Figure 21 is a schematic structural diagram of the reflow component provided by some embodiments of the present application.
  • the present application provides a battery 100.
  • the battery 100 includes a box 10, a bus component 30 and a plurality of battery cells 20 as provided in the above embodiments.
  • the bus component 30 is accommodated in the box 10; a plurality of battery cells 20 is accommodated in the box 10, and the plurality of battery cells 20 are stacked along the thickness direction Z of the first wall 213, and the electrodes of the multiple battery cells 20 are drawn out.
  • the parts 23 are electrically connected through bus parts 30 .
  • using the above-mentioned battery cell 20 can improve the assembly efficiency of the electrode lead-out part 23 and the bus part 30 of the battery cell 20, thereby improving the assembly efficiency of the battery 100.
  • the projection of the end of the bus part 30 at least partially overlaps the first wall 213.
  • the projection of the end of the bus part 30 at least partially overlaps the first wall 213 to save assembly space, make the internal components of the battery 100 compact, and improve the energy density of the battery 100 .
  • the electrode lead-out member 23 is welded and connected to the bus component 30 to form a soldering area P, along the thickness direction Z of the first wall 213, the first surface 23b (see Figure 4 ) is W1, the size of the soldering area P is W2, and satisfies 0.01 ⁇ W2/W1 ⁇ 0.5, preferably, 0.1 ⁇ W2/W1 ⁇ 0.3.
  • the ratio W2/W1 of the size W2 of the soldering area P and the size W1 of the first surface 23b may be 0.01, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, etc.
  • the soldering mark area P is an area showing solder marks formed at the welding position of the electrode lead-out member 23 and the bus member 30 after the electrode lead-out member 23 and the bus member 30 are welded together.
  • the ratio of the size W2 of the soldering area P to the size W1 of the first surface 23b satisfies the above relationship, so that the welding part has better overcurrent capability, higher connection strength, and better safety of the battery cell 20 . If the ratio of the size W2 of the soldering area P to the size W1 of the first surface 23b is too small, it will lead to poor overcurrent capability of the welding part and insufficient connection strength; If the ratio of W1 is too large, the local welding position may exceed the second part, causing the local insulation structure to be melted, affecting the assembly safety of the battery 100 .
  • the welding part has better overcurrent capacity and higher connection strength; compared with 0.3 ⁇ W2/W1 ⁇ 0.5, when 0.1 ⁇ When W2/W1 ⁇ 0.3, the welding part and the position where the electrode lead-out 23 and the tab 221 are connected have a larger overlapping area, so that the battery 100 has higher welding safety during the assembly process.
  • the size of the first surface 23b (see Figure 4) is F1
  • the size of the soldering area P is F2, satisfying 0.01 ⁇ F2/F1 ⁇ 0.5, preferably, 0.1 ⁇ F2/F1 ⁇ 0.3
  • the second direction Y is perpendicular to the thickness direction Z of the first wall 213 and parallel to the first surface 23b.
  • the ratio F2/F1 of the size F2 of the soldering area P in the second direction Y to the size F1 of the first surface 23b in the second direction Y can be 0.01, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, etc.
  • the ratio of the size F2 of the soldering area P in the second direction Y to the size F1 of the first surface 23b in the second direction Y satisfies the above relationship, so that the welding part has better overcurrent capability, higher connection strength, and better battery cell performance.
  • the security of 20 is better.
  • the ratio of the size F2 of the welding print area P in the second direction Y to the size F1 of the first surface 23b in the second direction Y is too small, it will lead to poor overcurrent capability of the welding part and insufficient connection strength; if the welding print If the ratio of the size F2 of the area P in the second direction Y to the size F1 of the first surface 23b in the second direction Y is too large, it may cause the local welding part to exceed the second part, causing the local insulation structure to be melted, affecting Assembly safety of battery 100 .
  • the welding part has better overcurrent capability and higher connection strength; compared with 0.3 ⁇ F2/F1 ⁇ 0.5, when 0.1 ⁇ When F2/F1 ⁇ 0.3, the welding part and the position where the electrode lead-out 23 and the tab 221 are connected have a larger overlapping area, so that the battery 100 has higher welding safety during the assembly process.
  • the area of the first surface 23b is M1
  • the area of the soldering area P is M2, satisfying 0.01 ⁇ M1/M2 ⁇ 0.5, preferably, 0.1 ⁇ M1/M2 ⁇ 0.3.
  • M1 W1*F1
  • M2 W2*F2.
  • the ratio M1/M2 of the area M1 of the first surface 23b and the area M2 of the soldering area P may be 0.01, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, etc.
  • the ratio of the area M1 of the first surface 23b to the area M2 of the soldering area P satisfies the above relationship.
  • the soldering area has better overcurrent capability, higher connection strength, and better safety of the battery cell 20 .
  • the welding part will have poor overcurrent capability and insufficient connection strength; when the bus part 30 and the electrode lead-out part 23 are laser welded, if the welding If the ratio of the area M2 of the printing area P to the area M1 of the first surface 23b is too large, the local welding position will exceed the connection position between the electrode lead-out 23 and the tab 221, causing the local insulation structure to melt and leak laser light, affecting the battery 100. assembly safety.
  • the welding part has better overcurrent capacity and higher connection strength; compared with 0.3 ⁇ M2/M1 ⁇ 0.5, when 0.2 ⁇ When M2/M1 ⁇ 0.3, the welding part and the position where the electrode lead-out 23 and the tab 221 are connected have a larger overlapping area, so that the battery 100 has higher welding safety during the assembly process.
  • the bus part 30 includes a bottom wall 31 , two side walls 32 and two flange parts 33 .
  • the two side walls 32 are opposite along the thickness direction Z of the first wall 213 . It is provided that the bottom wall 31 connects two side walls 32, and each flange portion 33 extends from an end of the corresponding side wall 32 away from the bottom wall 31 in a direction away from the other side wall 32.
  • the two flange portions 33 are respectively connected with The electrode leads 23 of the two battery cells 20 are connected.
  • the two ends of the bottom wall 31 along the thickness direction Z of the first wall 213 are connected to the two side walls 32 respectively, and the two flange portions 33 are provided correspondingly to the two side walls 32 .
  • the converging component 30 has a bent structure, that is, the bottom wall 31 , two side walls 32 and two flange portions 33 are integrally formed.
  • the side wall 32 is bent relative to the bottom wall 31
  • the flange portion 33 is bent relative to the side wall 32 . bend.
  • the plurality of battery cells 20 include adjacent first battery cells and second battery cells, and the bus part 30 is used to connect the electrode lead-out part 23 of the first battery cell and the electrode lead-out part 23 of the second battery cell,
  • the bus part 30 bypasses the side wall of the first battery cell parallel to the thickness direction Z of the first wall 213, so that one flange part 33 of the bus part 30 is connected to the electrode lead-out part 23 of the first battery cell, and the bus part The other flange portion 33 of 30 is connected to the electrode lead-out member 23 of the second battery cell.
  • the structure of the bus component 30 facilitates the connection between the bus component 30 and the first surfaces 23b of the electrode leads 23 of the two battery cells 20, so that the structure of the internal components of the battery 100 is compact.
  • the housing 21 also has a second wall 214 that is opposite to the first wall 213 .
  • the first area of the edge of the second wall 214 is indented to form a recess 2141 .
  • the recess 2141 is used to accommodate at least part of the electrode lead-out members 23 of the battery cells 20 adjacent to the second wall 214 .
  • the second wall 214 and the first wall 213 are two walls of the housing 21 that are oppositely arranged along the thickness direction Z of the first wall 213 .
  • the first area is an area on the edge of the second wall 214 , along the thickness direction Z of the first wall 213 , and corresponds to the area of the first wall 213 where the electrode lead-out 23 is installed.
  • the first region is recessed toward the first wall 213 along the thickness direction Z of the first wall 213 to form a recess 2141 .
  • the electrode leads 23 of the battery cells 20 adjacent to the second wall 214 may be partially located in the recess 2141 , or the electrode leads 23 of the battery cells 20 adjacent to the second wall 214 may be entirely located in the recess 2141 .
  • the depth of the recess 2141 is greater than the height of the electrode lead-out member 23 protruding from the first wall 213 . It can be understood that only part of the electrode lead-out member 23 of the battery unit 20 adjacent to the second wall 214 may be accommodated in the recess 2141 .
  • the surface of the second wall 214 may be provided with an insulating layer, so that when multiple battery cells 20 are stacked, the second wall 214 is insulated from the electrode leads 23 of adjacent battery cells 20 .
  • the insulating layer can also be provided on the surface of the electrode lead-out member 23 away from the first wall, so that when multiple battery cells 20 are stacked, the electrode lead-out member 23 can be adjacent to the first wall 213 and the second wall 214 of the battery cell. Insulation isolation.
  • the recess 2141 is arranged to accommodate the electrode lead-out parts 23 of the battery cells 20 adjacent to the second wall 214, making reasonable use of the assembly space, so that the battery 100 has a relatively high performance. High energy density.
  • the bus component 30 is a flat plate structure.
  • the bus part 30 may be a flat plate structure, and the bus part 30 has a simple structure. It is easy to process and manufacture and has low manufacturing cost.
  • the electrode lead-out member 23 is at least partially accommodated in the recess 2141 of the battery cell 20 adjacent to the first wall 213 .
  • the electrode lead-out member 23 includes a first part 231 and a second part 232 , the first part 231 is electrically connected to the tab 221 of the electrode assembly 22, the second part 232 is used to connect the bus component 30, the second part 232 exceeds the edge of the first wall 213, and the second part 232 is along the thickness direction of the first wall 213 Z extends and protrudes from the first part 231.
  • the first surface 23b is the surface of the second part 232 facing away from the first part 231 and points in the direction of the electrode lead-out part 23 along the first wall 213.
  • the second part 232 extends beyond the first wall 213. the recess 2141 of the adjacent battery cell 20 .
  • the projection of the first surface 23b in the direction perpendicular to the first surface 23b is located outside the recess 2141, so that the bus part 30 is connected to the first surface 23b.
  • the second part 232 exceeds the recess 2141 of the adjacent battery unit 20 , which means that when viewed in a direction perpendicular to the first surface 23 b , a part of the second part 232 is projected into the recess 2141 , and the other part of the second part 232 is projected to be located in the recess 2141 .
  • the projection of the portion outside the recess 2141 along the thickness direction Z of the first wall 213 is located on the side of the recess 2141 away from the first wall 213 of the battery cell 20 opposite to the recess 2141 .
  • the battery cell 20 may have a third wall 215 and a fourth wall disposed oppositely along the first direction The projection falls into the recess 2141 and the other part of the second portion 232 is projected to overlap the third wall 215 .
  • the housing 21 includes a housing 211 and an end cover 212.
  • the housing 211 has an opening, and the end cover 212 closes the opening.
  • the first wall is the end cover 212, which is perpendicular to the third wall. In the direction of a surface 23b, the projection of the second part 232 partially overlaps the projection of the housing 211.
  • the projection of the second part 232 partially overlaps with the housing 211, so that the second part 232 has a larger size in the arrangement direction of the end cover 212 and the housing 211, so that the second part 232 has a larger size.
  • a surface 23b has a larger area in the arrangement direction of the end cover 212 and the housing 211, so that the bus part 30 and the electrode lead-out part 23 have a larger connection area, thereby making the bus part 30 and the electrode lead-out part 23 firmly connected. .
  • the first surface 23b is located outside the recess 2141 and exceeds the recess 2141 of the adjacent battery cell 20.
  • the first surface 23b has a larger thickness in the thickness direction Z of the first wall 213. The size is such that the electrode lead-out part 23 and the first surface 23b have a larger connection area, so that the electrode lead-out part 23 and the bus part 30 are firmly connected.
  • the battery 100 further includes an isolation layer 40.
  • the isolation layer 40 is disposed on the surface of the electrode lead-out member 23 facing the housing 21.
  • the isolation layer 40 is used to insulate the electrode lead-out member 23 and the housing. twenty one.
  • the isolation layer 40 is an insulating member.
  • the isolation layer 40 can be pasted on the surface of the electrode lead-out member 23 facing the housing 21 of the adjacent battery cell 20 .
  • the isolation layer 40 can be pasted on the surface of the electrode lead-out member 23 facing the electrode lead-out.
  • the material of the isolation layer 40 can be plastic or plastic.
  • the isolation layer 40 may be disposed on one surface or multiple surfaces of the electrode lead-out member 23 .
  • the isolation layer 40 may be arranged in an L shape, and the isolation layer 40 may be arranged on two adjacent surfaces of the electrode lead-out member 23 .
  • the isolation layer 40 is provided to insulate the electrode lead-out part 23 from the casing 21 of the adjacent battery cell 20 or the casing 21 of the battery cell 20 on which the electrode lead-out part 23 is provided, thereby improving the safety of the battery 100 sex.
  • two adjacent electrode lead-out parts 23 of two adjacent battery cells 20 have two ends that are away from each other, and the bus part 30 The two ends are flush with each other.
  • One end of the bus part 30 is flush with the end of the electrode lead-out member 23 of one of the two adjacent battery cells 20 close to the first wall 213 , and the other end of the bus part 30 is flush with the other end of the two adjacent battery cells 20 .
  • One end of the electrode lead-out member 23 facing away from the first wall 213 is flush;
  • the opposite ends of the bus part 30 are flush with the opposite ends of the electrode lead-out part 23 respectively.
  • the second direction Y, the thickness direction Z of the first wall 213, the bus part 30 are flush with each other.
  • the thickness direction of 30 is perpendicular to each other.
  • the thickness direction of the bus part 30 may be perpendicular to the first surface 23b.
  • one end of the bus part 30 is flush with an end of the electrode lead-out member 23 of a battery cell 20 close to the first wall 213 of the battery cell 20, and the other end of the bus part 30 is flush with the first wall 213 of the battery cell 20.
  • One end is flush with the end of the electrode lead-out member 23 of an adjacent battery cell 20 that is away from the first wall 213 of the battery cell 20 .
  • the two ends of the bus part 30 are respectively flush with the opposite ends of the two electrode leads 23 of the two battery cells 20 .
  • the two ends of the bus part 30 in the thickness direction Z of the first wall 213 are respectively flush with the two opposite ends of the electrode lead-out parts 23 of the two adjacent battery cells 20, so as to facilitate
  • the bus part 30 and the corresponding electrode lead-out part 23 are positioned in the thickness direction Z of the first wall 213 to facilitate the connection between the bus part 30 and the electrode lead-out part 23;
  • the opposite ends of the bus part 30 along the second direction Y are respectively connected with
  • the opposite ends of the electrode lead-out part 23 along the second direction Y are flush, so as to facilitate the positioning of the bus part 30 and the corresponding electrode lead-out part 23 in the second direction Y, and to facilitate the connection between the bus part 30 and the electrode lead-out part 23 .
  • the present application also provides an electrical device.
  • the electrical device includes the battery cell 20 provided in any of the above embodiments.
  • the battery cell 20 is used to provide electric energy.
  • the electrical equipment may be any of the aforementioned devices or systems using the battery cells 20 .
  • the present application provides a battery cell 20 , which is in the shape of a flat rectangular parallelepiped.
  • the battery cell 20 includes a casing 21 , an electrode assembly 22 , an electrode lead-out member 23 , an electrode terminal 25 , a support member 241 , a first insulating member 242 , and a second insulating member 243 .
  • the housing 21 includes a housing 211 and an end cover.
  • the housing 211 has an opening.
  • the end cover closes the opening.
  • the electrode assembly 22 is disposed in the housing 211.
  • the end cover is the first wall 213.
  • the tabs 221 of the electrode assembly 22 extend from both ends of the battery cell 20 in the length direction.
  • the electrode lead-out member 23 is disposed on a side of the first wall 213 facing away from the interior of the battery cell 20 .
  • the first wall 213 is provided with an electrode lead-out hole 2131.
  • the electrode terminal 25 is inserted through the electrode lead-out hole 2131.
  • One end of the electrode terminal 25 is electrically connected to the tab 221 through an adapter 26.
  • the electrode lead-out member 23 includes a first part 231, a second part 232 and a third part 233.
  • the first part 231, the third part 233 and the second part 232 are arranged in sequence along the first direction X.
  • the third part 233 includes a first section 2331 and The second section 2332, the first section 2331 extends from the first section 231 in a direction away from the first wall 213, the second section 2332 connects the first section 2331 and the second section 232, the second section 232 extends from the second section 2332 towards Extending in a direction close to the first wall 213, the second part 232 is parallel to the first part 231.
  • a gap is formed between the first section 2331 and the second part 232.
  • the first section 2331, the second section 2332 and the second section 232 form a U. shape structure.
  • the first part 231 has a second surface 23a away from the bottom wall 31, and the second part 232 has a first surface 23b away from the first part 231 along the first direction X.
  • the first part 231 is parallel to the first wall 213, and along the In the thickness direction Z, at least part of the second portion 232 extends beyond the second surface 23a.
  • the support member 241 is inserted in the gap.
  • At least part of the first insulating member 242 is disposed between the first wall 213 and the first part 231 of the electrode lead-out member 23 .
  • At least part of the second insulating member 243 is disposed between the second part 232 and the first wall 213.
  • the second insulating member 243, the supporting member 241 and the first insulating member 242 are integrally formed.
  • One end of the second part 232 away from the second section 2332 is in contact with the second insulating member 243 .
  • the first insulating member 242 is provided with a second through hole 2423 for mating with the electrode terminal 25 .
  • the electrode lead-out member 23 is provided with a first through hole 235 for mating with the electrode terminal 25.
  • the first through hole 235 extends from the fifth surface 23c to the second surface 23a along the thickness direction Z of the first wall 213.
  • the other side of the electrode terminal 25 One end passes through the second through hole 2423 and is inserted into the first through hole 235 , and the electrode terminal 25 and the electrode lead-out member 23 are riveted.
  • the first surface 23b is parallel to the thickness direction Z of the first wall 213, and is used for welding with the bus part 30.
  • the first surface 23b is parallel to the thickness direction Z of the first wall 213, so as to facilitate the welding of the bus part 30 and the electrode lead-out part 23, thereby improving the battery 100 composed of the battery cell 20. assembly efficiency.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请实施例提供一种电池单体、电池及用电设备。电池单体包括：外壳，具有第一壁；电极组件，设置于所述外壳内；电极引出件，安装于所述第一壁，用于将所述电极组件的电能引出；其中，所述电极引出件包括第一表面，所述第一表面所在的平面与所述第一壁相交，所述第一表面用于与汇流部件连接。该电池单体构成的电池，具有较高的装配效率。

Description

电池单体、电池及用电设备
相关申请的交叉引用
本申请要求享有于2022年06月30日提交的名称为“电池单体、电池及用电设备”的国际专利申请PCT/CN2022/103107的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池技术领域，特别是涉及一种电池单体、电池及用电设备。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。
电池的制造过程中，电池的装配效率是一个不可忽视的问题。因此，如何提高电池的装配效率，是电池技术中一个亟需解决的技术问题。
发明内容
本申请的目的在于提供一种电池单体、电池及用电设备。该电池单体构成的电池，具有较高的装配效率。
本申请是通过如下技术方案实现的：
第一方面，本申请提供了一种电池单体，包括：外壳，具有第一壁；电极组件，设置于所述外壳内；电极引出件，安装于所述第一壁，用于将所述电极组件的电能引出；其中，所述电极引出件包括第一表面，所述第一表面所在的平面与所述第一壁相交，所述第一表面用于与汇流部件连接。
根据本申请实施例的电池单体，第一表面所在的平面与第一壁相交，以便于汇流部件与电极引出件的焊接，从而提高由该电池单体构成的电池的装配效率。
根据本申请的一些实施例，所述电极引出件还包括第二表面，所述第二表面所在的平面与所述第一表面相交，所述第二表面的面积为D1，所述第一表面的面积为D2，满足0.1≤D2/D1≤10。
在上述方案中，第一表面的面积D2和第二表面的面积D1的比值满足上述关系，可以兼顾电池的能量密度及过流面积。当D2/D1＜0.1时，D2过小，汇流部件与电极引出件的焊接面积过小，影响过流能力；或，D1过大，电极引出件在垂直于第一壁的厚度方向的方向上占用面积过大，占用电极组件的空间，影响能量密度。当10＜D2/D1时，D2过大，电极引出件在第一壁的厚度方向上占用的空间过大，影响能量密度；或，D1过小，极耳与电极引出件之间的电连接部件(如电极端子)与电极引出件之间的连接面积过小，影响过流能力。
根据本申请的一些实施例，0.5≤D2/D1≤2。
在上述方案中，当第一表面的面积D2与第二表面的面积D1的比值满足0.5≤D2/D1≤2时，相较于0.1≤D2/D1＜0.5和2＜D2/D1≤10时，电极引出件与汇流部件的焊接面积、电极引出件与电极端子的焊接面积能够进一步得到保证，过流能力更优，且电极引出件占用的面积较小，电池的能量密度更大。
根据本申请的一些实施例，沿所述第一壁的厚度方向，所述第一表面的尺寸为W1，满足1mm≤W1≤10mm，优选地，2mm≤W1≤5mm。
在上述方案中，沿第一壁的厚度方向，第一表面的尺寸W1满足上述关系，使得第一表面与汇流部件能够具有较大的连接面积，以便于第一表面与汇流部件连接。
根据本申请的一些实施例，所述电极引出件还包括第二表面，所述第二表面所在的平面与所述第一表面相交，所述电极引出件设置于所述第一壁的背离所述电池单体内部的一侧，所述电极引出件包括第一部分和第二部分，所述第一部分与所述电极组件的极耳电连接，所述第二部分用于连接所述汇流部件，所述第二表面为所述第一部分远离所述第一壁的表面，所述第一表面为所述第二部分的表面。
在上述方案中，电极引出件设置于第一壁的背离电池单体内部的一侧，以便于电极引出件与汇流部件连接；第一部分和第二部分分别用于实现与极耳和汇流部件的连接，有利于提高电极引出件与电极端子的连接面积和电极引出件与汇流部件的连接面积。
根据本申请的一些实施例，所述电池单体还包括：电极端子，所述第一壁设置有电极引出孔，所述电极 端子的一端连接所述第一部分，另一端通过所述电极引出孔与所述电极组件的极耳电连接。
在上述方案中，第一部分和电极组件的极耳通过电极端子电连接，以实现将电极组件的电能引导至电极引出件，以便于电极引出件将电极组件的电能引出。
根据本申请的一些实施例，沿所述第一壁的厚度方向，至少部分所述第二部分超出于所述第一部分。
在上述方案中，至少部分第二部分超出第一部分，以增大第一表面的面积，便于第二部分与汇流部件的连接和增大连接面积。
根据本申请的一些实施例，所述第一部分和所述第二部分沿第一方向排列，所述第一表面为所述第二部分沿所述第一方向背离所述第一部分的表面，所述第一方向垂直于所述第一壁的厚度方向。
在上述方案中，第一部分和第二部分沿第一方向排列，第一表面为第二部分沿第一方向背离第一部分的表面，方便电极引出件与汇流部件的装配。
根据本申请的一些实施例，所述第一部分与所述第一壁平行。
在上述方案中，第一部分与第一壁平行，便于实现第一部分的装配。
根据本申请的一些实施例，至少部分所述第二部分沿背离所述第一壁的方向延伸且超出所述第二表面。
在上述方案中，至少部分第二部分超出第二表面，使得至少部分第二部分位于第二表面的背离第一壁的一侧，以降低第二部分与汇流部件连接时与第一壁的干涉。
根据本申请的一些实施例，所述电极引出件还包括第三部分，所述第三部分连接所述第一部分和所述第二部分。
在上述方案中，第三部分连接第一部分和第二部分，使得第一部分和第二部分之间可以具有一定的距离，以便于电极引出件和汇流部件的连接。
根据本申请的一些实施例，所述第三部分包括第一段和第二段，所述第一段从所述第一部分朝着背离所述第一壁的方向延伸，所述第二段连接所述第一段和所述第二部分，所述第一段和所述第二部分之间形成有间隙。
在上述方案中，第一段和第二部分之间形成间隙，以便于电极引出件能够变形，以吸收电池单体膨胀时产生的膨胀应力。
根据本申请的一些实施例，所述第二部分从所述第二段朝着靠近所述第一壁的方向延伸，所述第一段、所述第二段及所述第二部分形成U形结构。
在上述方案中，第一段、第二段及第二部分形成U形结构，结构简单，便于成型。
根据本申请的一些实施例，所述电池单体还包括：支撑件，插设于所述间隙内。
在上述方案中，支撑件插设于间隙内，支撑件能够在汇流部件连接于第二部分时支撑第二部分，便于第二部分与汇流部件的连接。
根据本申请的一些实施例，所述支撑件的相对的两面分别与所述第一段和所述第二部分接触。
在上述方案中，支撑件与第一段和第二部分接触，支撑件能够起到限位的作用，限制第二部分的位置移动，以便于第二部分与汇流部件连接稳定。
根据本申请的一些实施例，所述支撑件为绝缘材质，沿第二方向，所述支撑件超出所述第三部分的两端，所述第二方向垂直于所述第一壁的厚度方向且平行于所述第一表面。
在上述方案中，支撑件为绝缘材质，并且支撑件超出第三部分的两端，具有较好的绝缘效果。
根据本申请的一些实施例，所述电池单体还包括：第一绝缘件，至少部分设置于所述第一壁与所述第一部分之间，以绝缘隔离所述第一壁与所述第一部分。
在上述方案中，通过至少部分第一绝缘件设置于第一壁与第一部分之间，将第一壁与第一部分分隔，提高了电池单体的安全性。
根据本申请的一些实施例，所述支撑件连接于所述第一绝缘件。
在上述方案中，支撑件连接于第一绝缘件，使得支撑件与第一绝缘件的连接稳定，以便于支撑件支撑第二部分。
根据本申请的一些实施例，沿第二方向，所述第一绝缘件超出所述第一部分的两端，所述第二方向垂直于所述第一壁的厚度方向且平行于所述第一表面。
在上述方案中，第一绝缘件超出第一部分的两端，以使第一部分与第一壁具有较好的绝缘效果。
根据本申请的一些实施例，所述电池单体还包括：第二绝缘件，至少部分设置于所述第二部分与所述第一壁之间，以绝缘隔离所述第二部分与所述第一壁。
在上述方案中，通过第二绝缘件设置于第二部分与第一壁之间，将第二部分与第一壁绝缘分隔，提高了电池单体的安全性。
根据本申请的一些实施例，所述第二绝缘件连接于所述第一绝缘件。
在上述方案中，第二绝缘件连接于第一绝缘件，第二绝缘件与第一绝缘件的连接稳定，两者可以一体成型，以便于装配定位。
根据本申请的一些实施例，所述第二部分的远离所述第二段的一端抵接于所述第二绝缘件。
在上述方案中，第二部分的远离第二段的一端抵接于第二绝缘件，能够限制第二绝缘件沿第一壁的厚度方向移动。
根据本申请的一些实施例，沿第二方向，所述第二绝缘件超出所述第二部分的两端，所述第二方向垂直于所述第一壁的厚度方向且平行于所述第一表面。
在上述方案中，第二绝缘件沿第二方向超出第二部分的两端，以使第二部分与第一壁具有较好的绝缘效果。
根据本申请的一些实施例，所述第一部分的厚度大于所述第三部分的厚度，和/或，所述第二部分的厚度大于所述第三部分的厚度。
在上述方案中，在第一部分的厚度大于第三部分的厚度的实施例中，能够增强第一部分的强度，降低第一部分和极耳与电极引出件之间的电连接部件(如电极端子)焊接时焊穿第一部分的风险，满足焊接需求；在第二部分的厚度大于第三部分的厚度的实施例中，能够降低第二部分与汇流部件焊接时焊穿第二部分的风险，满足焊接需求。在第一部分的厚度大于第三部分的厚度、第二部分的厚度大于第三部分的厚度的实施例中，第一部分和第二部分均具有较厚的厚度，能够满足焊接需求，降低第一部分和第二部分被焊穿的风险。
根据本申请的一些实施例，所述第一部分、所述第三部分和所述第二部分沿第一方向依次排列，所述第三部分沿第二方向的尺寸大于所述第一部分沿所述第二方向的尺寸，所述第三部分沿所述第二方向的尺寸大于所述第二部分沿所述第二方向的尺寸，所述第一方向、所述第二方向和所述第一壁的厚度方向两两垂直。
在上述方案中，由于第三部分的厚度较小，沿第二方向，相较于第一部分和第二部分，第三部分的尺寸最大，能够使得第三部分具有较大的过流面积，以满足过流需求。
根据本申请的一些实施例，所述第一部分的过流截面积为S1，所述第三部分的过流截面积为S2，所述第二部分的过流截面积为S3；其中，0.2≤S1/S2≤5，0.2≤S2/S3≤5，0.2≤S1/S3≤5；优选地，0.5≤S1/S2≤2，0.5≤S2/S3≤2，0.5≤S1/S3≤2。
在上述方案中，第一部分的过流面积S1、第二部分的过流面积S2及第三部分的过流面积S3满足上述关系，使得电极引出件整体具有较佳的过流能力。当0.5≤S1/S2≤2、0.5≤S2/S3≤2、0.5≤S1/S3≤2时，相较于0.2≤S1/S2≤5、0.2≤S2/S3≤5、0.2≤S1/S3≤5，电极引出件整体的过流能力更佳。
根据本申请的一些实施例，所述第一部分的厚度为H1，满足0.2mm≤H1≤5mm，优选地，0.5mm≤H1≤4mm；或所述第三部分的厚度为H2，满足0.2mm≤H2≤2mm，优选地，0.3mm≤H2≤1.2mm；或所述第二部分的厚度为H3，满足0.2mm≤H3≤5mm，优选地，0.5mm≤H3≤4mm。
在上述方案中，第一部分的厚度H1满足上述关系，在第一部分具有较佳的过流能力的情况下，第一部分不易被焊穿；第三部分的厚度H2满足上述关系，在使得第三部分具有较大的过流面积的情况下，便于第三部分折弯；第二部分的厚度H3满足上述关系，在第二部分具有较佳的过流能力的情况下，第二部分不易被焊穿。
根据本申请的一些实施例，所述电池单体还包括：电极端子，所述第一壁设置有电极引出孔，所述电极端子穿设于所述电极引出孔，所述电极端子的一端连接所述电极引出件，另一端与所述电极组件的极耳电连接。
在上述方案中，通过电极端子穿设于电极引出孔，实现对电极端子的定位，便于实现电极端子与电极引出件和极耳的连接。
根据本申请的一些实施例，所述电极端子的数量和所述电极引出孔的数量均为多个，所述电极端子与所述电极引出孔一一对应，所述电极引出件设置有第一凹槽，所述第一凹槽位于相邻两个所述电极端子之间。
在上述方案中，电极端子的数量和电极引出孔的数量均为多个，具有较佳的过流能力。第一凹槽能够在不影响过流的情况下减轻电极引出件的重量。
根据本申请的一些实施例，所述第一凹槽延伸至所述电极引出件的边缘。
在上述方案中，第一凹槽延伸至电极引出件的边缘，以便于电极引出件的边缘加工第一凹槽，降低加工难度。
根据本申请的一些实施例，所述电池单体还包括：第一绝缘件，至少部分设置于所述第一壁与所述电极引出件之间，以绝缘隔离所述第一壁与所述电极引出件，所述第一绝缘件包括第一凸起，所述第一凸起插设于所述第一凹槽内。
在上述方案中，通过第一绝缘件绝缘隔离第一壁与电极引出件，使得第一壁与电极引出件分隔；第一凸起插设于第一凹槽内，以便于对电极引出件进行定位。
根据本申请的一些实施例，所述第一壁包括背离所述电池单体内部的第三表面，所述第三表面形成有第 二凸起，所述第一绝缘件包括第二凹槽，所述第二凸起插设于所述第二凹槽内。
在上述方案中，通过第二凸起与第二凹槽配合，实现对第一绝缘件的定位，便于第一绝缘件与第一壁的装配。
根据本申请的一些实施例，所述电极引出件超出所述第一壁的边缘，所述第一表面位于所述电极引出件的超出所述第一壁的部分。
在上述方案中，电极引出件超出第一壁的边缘，沿垂直于底壁的方向观察，第一表面的投影与第一壁不重叠，以便于电极引出件与汇流部件电连接。
根据本申请的一些实施例，所述电极引出件包括第一部分和第二部分，所述第一部分与所述电极组件的极耳电连接，所述第二部分用于连接所述汇流部件，所述第二部分超出所述第一壁的边缘，所述第二部分沿所述第一壁的厚度方向延伸且凸出于所述第一部分，所述第一表面为所述第二部分背离所述第一部分的表面。
在上述方案中，由于第二部分用于连接汇流部件，第二部分超出第一壁的边缘，第一表面为第二部分远离第一部分的表面，所以，当汇流部件与第一表面连接时，汇流部件可以与第一壁具有一定的距离，降低汇流部件与第一壁干涉的风险，以及降低汇流部件与外壳接触短路的风险，以便于汇流部件与电极引出件的装配。
根据本申请的一些实施例，所述第一表面所在的平面与所述第一壁垂直。
在上述方案中，第一表面所在的平面与第一壁垂直，便于实现电极引出件与汇流部件的电连接。
根据本申请的一些实施例，所述外壳包括沿所述第一壁的厚度方向相对设置的所述第一壁和第二壁、沿第一方向相对设置的第三壁和第四壁、以及沿第二方向相对设置的第五壁和第六壁，所述第三壁的面积和所述第四壁的面积均小于所述第一壁的面积，所述第三壁的面积和所述第四壁的面积均小于所述第二壁的面积，所述第五壁的面积和所述第六壁的面积均小于所述第一壁的面积，所述第五壁的面积和所述第六壁的面积均小于所述第二壁的面积，所述第一壁的厚度方向、所述第一方向和所述第二方向两两垂直。
根据本申请的一些实施例，所述外壳包括壳体和端盖，所述壳体具有开口，所述端盖封闭所述开口，所述第一壁为所述端盖。
在上述方案中，第一壁为端盖，便于电极引出件的装配。
第二方面，本申请提供了一种电池，包括：箱体；汇流部件，容纳于所述箱体内；多个如上述实施例提供的电池单体，容纳于所述箱体内，多个所述电池单体沿所述第一壁的厚度方向堆叠设置，多个所述电池单体的所述电极引出件通过所述汇流部件电连接。
根据本申请实施例的电池，采用上述的电池单体，能够提高电池单体的电极引出件与汇流部件的装配效率，进而提高电池的装配效率。
根据本申请的一些实施例，在所述第一壁的厚度方向上，所述汇流部件的端部的投影与所述第一壁至少部分重叠。
在上述方案中，汇流部件的端部的投影与第一壁至少部分重叠，以便于节省装配空间，使得电池的内部部件的结构紧凑，提高电池的能量密度。
根据本申请的一些实施例，所述电极引出件与所述汇流部件焊接连接并形成焊印区，沿所述第一壁的厚度方向，所述第一表面的尺寸为W1，所述焊印区的尺寸为W2，满足0.01≤W2/W1≤0.5，优选地，0.1≤W2/W1≤0.3。
在上述方案中，焊印区的尺寸W2与第一表面的尺寸W1的比值满足上述关系，使得焊接部位过流能力较佳、连接强度较高、电池单体的安全性较好。如果焊印区的尺寸W2与第一表面的尺寸W1的比值过小，则导致焊接部位过流能力不佳、连接强度不足；当汇流部件与电极引出件激光焊接时，如果焊印区的尺寸W2与第一表面的尺寸W1的比值过大，则可能导致局部焊接位置超出第二部分，使得局部绝缘结构被烧熔，电池单体的安全性降低。
根据本申请的一些实施例，沿第二方向，所述第一表面的尺寸为F1，所述焊印区的尺寸为F2，满足0.01≤F2/F1≤0.5，优选地，0.1≤F2/F1≤0.3，所述第二方向垂直于所述第一壁的厚度方向并平行于所述第一表面。
在上述方案中，焊印区在第二方向上的尺寸F2与第一表面在第二方向上的尺寸F1的比值满足上述关系，使得焊接部位过流能力较佳、连接强度较高、电池单体的安全性较好。
根据本申请的一些实施例，所述第一表面的面积为M1，所述焊印区的面积为M2，满足0.01≤M1/M2≤0.5，优选地，0.1≤M1/M2≤0.3。
在上述方案中，第一表面的面积M1与焊印区的面积M2的比值满足上述关系，焊印部位过流能力较佳、连接强度较高、电池单体的安全性较好。
根据本申请的一些实施例，所述汇流部件包括底壁、两个侧壁和两个翻边部，所述两个侧壁沿所述第一壁的厚度方向相对设置，所述底壁连接所述两个侧壁，每个所述翻边部从对应的所述侧壁的远离所述底壁的一端向背离另一个所述侧壁的方向延伸，所述两个翻边部分别与两个所述电池单体的所述电极引出件连接。
在上述方案中，汇流部件的结构形式，便于实现汇流部件与两个电池单体的电极引出件的第一表面连接。
根据本申请的一些实施例，所述外壳还具有与所述第一壁相对设置的第二壁，所述第二壁的边缘的第一区域内陷形成凹部，所述凹部用于容纳与所述第二壁相邻的所述电池单体的至少部分所述电极引出件。
在上述方案中，在多个电池单体堆叠时，凹部的设置，能够容纳与第二壁相邻电池单体的至少电极引出件，合理利用装配空间，使得电池具有较高的能量密度。
根据本申请的一些实施例，所述电极引出件超出所述第一壁的边缘，所述第一表面位于所述电极引出件的超出所述第一壁的部分，所述汇流部件为平板结构。
在上述方案中，电极引出件超出第一壁的边缘，沿垂直于底壁的方向观察，第一表面的投影与第一壁不重叠，以便于电极引出件与汇流部件电连接，汇流部件结构简单，便于加工制造，制造成本低。
根据本申请的一些实施例，所述电极引出件至少部分容纳于与所述第一壁相邻的所述电池单体的所述凹部，所述电极引出件包括第一部分和第二部分，所述第一部分与所述电极组件的极耳电连接，所述第二部分用于连接所述汇流部件，所述第二部分超出所述第一壁的边缘，所述第二部分沿所述第一壁的厚度方向延伸且凸出于所述第一部分，所述第一表面为所述第二部分背离所述第一部分的表面，沿所述第一壁指向所述电极引出件的方向，所述第二部分超出与所述第一壁相邻的所述电池单体的所述凹部；和/或，所述外壳包括壳体和端盖，所述壳体具有开口，所述端盖封闭所述开口，所述第一壁为所述端盖，在垂直于所述第一表面的方向上，所述第二部分的投影与所述壳体的投影部分重叠。
在上述方案中，电极引出件至少部分容纳于与第一壁相邻的电池单体的凹部，且第二部分超出相邻的电池单体的凹部，因此，第一表面在第一壁的厚度方向上可以具有较大的尺寸，以便于电极引出件与第一表面具有较大的连接面积，从而使得电极引出件与汇流部件连接牢固。在垂直于第一表面的方向上，第二部分的投影与与壳体的投影部分重叠，使得第二部分在端盖与壳体的排列方向上具有较大的尺寸，从而使得第一表面在端盖与壳体的排列方向上具有较大的面积，以使得汇流部件与电极引出件具有较大的连接面积，进而使得汇流部件与电极引出件连接牢固。
根据本申请的一些实施例，所述电池还包括隔离层，所述隔离层设置于所述电极引出件的面向所述外壳的表面，所述隔离层用于绝缘隔离所述电极引出件与所述外壳。
在上述方案中，隔离层的设置，用于绝缘隔离电极引出件与相邻的电池单体的外壳或者设置电极引出件的电池单体的外壳，提高电池的安全性。
根据本申请的一些实施例，沿所述第一壁的厚度方向，相邻两个所述电池单体的相邻的两个所述电极引出件具有相背离的两个端部，所述汇流部件的两端分别与两个所述端部齐平；和/或，沿第二方向，所述汇流部件的相对的两端分别与所述电极引出件的相对的两端齐平，所述第二方向、所述第一壁的厚度方向、所述汇流部件的厚度方向两两垂直。
在上述方案中，汇流部件在第一壁的厚度方向上的两端分别与相邻两个电池单体的相邻的两个电极引出件的相背离的两个端部齐平，以便于在第一壁的厚度方向对汇流部件和对应的电极引出件定位，便于汇流部件与电极引出件的连接；汇流部件的沿第二方向的相对的两端分别与电极引出件的沿第二方向的相对的两端齐平，以便于在第二方向上对汇流部件和对应的电极引出件定位，便于汇流部件与电极引出件的连接。
第三方面，本申请提供了一种用电设备，包括上述任一实施例提供的电池单体，所述电池单体用于提供电能。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
图1为本申请一些实施例提供的车辆的结构示意图；
图2为本申请一些实施例提供的电池的爆炸图；
图3为本申请一些实施例提供的电池单体的爆炸图；
图4为本申请一些实施例提供的电极引出件的立体图；
图5为本申请一些实施例提供的电极引出件与第一壁的装配示意图；
图6为本申请一些实施例提供的电极引出件的结构示意图；
图7为本申请一些实施例提供的电极引出件的结构示意图；
图8为本申请另一些实施例提供的电极引出件的结构示意图；
图9为本申请又一些实施例提供的电极引出件的结构示意图；
图10为本申请又一些实施例提供的电极引出件的结构示意图；
图11为本申请一些实施例提供的支撑件、第一绝缘件和第二绝缘件的结构示意图；
图12为本申请一些实施例提供的电池单体的部分结构的剖视图；
图13为本申请另一些实施例提供的电极引出件的侧视图；
图14为图13的俯视图；
图15为本申请一些实施例提供的第一部分的过流截面的示意图；
图16为本申请一些实施例提供的第三部分的过流截面的示意图；
图17为本申请一些实施例提供的第二部分的过流截面的示意图；
图18为本申请一些实施例提供的电池单体的剖视图；
图19为图18的A处局部放大图；
图20为图2的B处局部放大图；
图21为本申请一些实施例提供的回流部件的结构示意图；
图22为本申请一些实施例提供的电池的部分结构示意图；
在附图中，附图并未按照实际的比例绘制。
标记说明：100-电池；10-箱体；11-第一子箱体；12-第二子箱体；20-电池单体；21-外壳；211-壳体；212-端盖；213-第一壁；213a-第三表面；2131-电极引出孔；2132-第二凸起；214-第二壁；2141-凹部；215-第三壁；22-电极组件；221-极耳；23-电极引出件；23a-第二表面；23b-第一表面；23c-第五表面；23d-侧面；231-第一部分；232-第二部分；233-第三部分；2331-第一段；2332-第二段；234-第一凹槽；235-第一通孔；241-支撑件；242-第一绝缘件；242a-第六表面；242b-第七表面；2421-第一凸起；2422-第二凹槽；2423-第二通孔；243-第二绝缘件；25-电极端子；26-转接件；27-第三绝缘件；30-汇流部件；31-底壁；32-侧壁；33-翻边部；40-隔离层；P-焊印区；200-控制器；300-马达；1000-车辆。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，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、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)。
在本申请实施例的描述中，技术术语“长度”“宽度”“厚度”“内”“外”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
电池单体包括电极组件和电解液，电极组件由正极极片、负极极片和隔离膜组成。电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。正极极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面，未涂敷正极活性物质层的集流体作为正极极耳。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面，未涂敷负极活性物质层的集流体作为负极极耳。负极集流体的材料 可以为铜，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极极耳的数量为多个且层叠在一起，负极极耳的数量为多个且层叠在一起。隔离膜的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。
电池单体还包括外壳、电极端子和电极引出件；外壳包括壳体和端盖，壳体具有开口，端盖封闭开口，电极组件设置于壳体内；电极端子穿设于端盖，电极组件的极耳连接于电极端子的一端，电极引出件连接于电极端子的另一端。电极引出件用于将电池单体的电能引出。电极引出件设置有供电极端子穿设的通孔，电极端子穿设于该通孔内且与电极引出件铆接。
电池技术的发展要同时考虑多方面的设计因素，例如，能量密度、放电容量、充放电倍率等性能参数，另外，还需要考虑电池的装配效率。
现有技术中，电池的装配效率较低，影响电池的批量生产。发明人研究发现，电池的生产过程中，汇流部件通常焊接于电极引出件的背离端盖的端面(即下文所提的第二表面)，由于该端面不便于汇流部件与电极引出件的焊接，多个电池单体之间的装配工艺复杂，使得电池的装配效率较低。
鉴于此，为了解决汇流部件与电极引出件的装配效率较低导致电池的装配效率低的问题，发明人经过深入研究，设计了一种电池单体，电极引出件与汇流部件连接的表面所在的平面与第一壁相交，以便于汇流部件与电极引出件的焊接，从而提高了由该电池单体构成的电池的装配效率。
本申请实施例公开的电池单体可以但不限用于车辆、船舶或飞行器等用电设备中。可以使用具备本申请公开的电池单体、电池等组成该用电设备的电源系统。
本申请实施例提供一种使用电池作为电源的用电设备，用电设备可以为但不限于手机、平板电脑、笔记本电脑、电动玩具、电动工具、电动自行车、电动摩托车、电动汽车、轮船、航天器等等。其中，电动玩具可以包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
以下实施例为了方便说明，以本申请一实施例的一种用电设备为车辆1000为例进行说明。
请参照图1，图1为本申请一些实施例提供的车辆的结构示意图。车辆1000可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1000的内部设置有电池100，电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电，例如，电池100可以作为车辆1000的操作电源，用于车辆1000的电路系统，例如用于车辆1000的启动、导航和运行时的工作用电需求。
车辆1000还可以包括控制器200和马达300，控制器200用来控制电池100为马达300供电，例如，用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池100不仅可以作为车辆1000的操作电源，还可以作为车辆1000的驱动电源，代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
请参照图2，图2为本申请一些实施例提供的电池的爆炸图。电池100包括箱体10和电池单体20，电池单体20容纳于箱体10内。其中，箱体10用于为电池单体20提供容纳空间，箱体10可以采用多种结构。在一些实施例中，箱体10可以包括第一子箱体11和第二子箱体12，第一子箱体11与第二子箱体12相互盖合，第一子箱体11和第二子箱体12共同限定出用于容纳电池单体20的容纳空间。第二子箱体12可以为一端开口的空心结构，第一子箱体11可以为板状结构，第一子箱体11盖合于第二子箱体12的开口侧，以使第一子箱体11与第二子箱体12共同限定出容纳空间；第一子箱体11和第二子箱体12也可以是均为一侧开口的空心结构，第一子箱体11的开口侧盖合于第二子箱体12的开口侧。
在电池100中，电池单体20可以是多个，多个电池单体20之间可串联或并联或混联，混联是指多个电池单体20中既有串联又有并联。多个电池单体20之间可直接串联或并联或混联在一起，再将多个电池单体20构成的整体容纳于箱体10内；当然，电池100也可以是多个电池单体20先串联或并联或混联组成电池模块形式，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体10内。电池100还可以包括其他结构，例如，该电池100还可以包括汇流部件30，用于实现多个电池单体20之间的电连接。
其中，电池单体20可以为二次电池或一次电池；电池单体20还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。
请参照图3，图3为本申请一些实施例提供的电池单体的爆炸图。如图3所示，电池单体20包括外壳21、电极组件22、电极引出件23及电极端子25。外壳21包括壳体211和端盖212，壳体211具有开口，端盖212封闭开口，以将电池单体20的内部环境与外部环境隔绝。
壳体211是用于配合端盖212以形成电池单体20的内部环境的组件，其中，形成的内部环境可以用于容纳电极组件22、电解液以及其他部件。壳体211和端盖212可以是独立的部件。壳体211可以是多种形状和多种尺寸的。具体地，壳体211的形状可以根据电极组件22的具体形状和尺寸大小来确定。壳体211的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。本申请实施例以壳体211为长方体形为例介绍。
端盖212是指盖合于壳体211的开口处以将电池单体20的内部环境隔绝于外部环境的部件。不限地，端盖212的形状可以与壳体211的形状相适应以配合壳体211。可选地，端盖212可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖212在受挤压碰撞时就不易发生形变，使电池单体20能够具备更高的结构强度，安全性能也可以有所提高。端盖212上可以设置有如电极端子25等的功能性部件。电极端子25可以用于与电极组件22电连接，以用于输出或输入电池单体20的电能。端盖212的材质也可以是多种的，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。在一些实施例中，在端盖212的内侧还可以设置有绝缘结构，绝缘结构可以用于隔离壳体211内的电连接部件与端盖212，以降低短路的风险。示例性的，绝缘结构可以是塑料、橡胶等。
电极组件22是电池单体20中发生电化学反应的部件。壳体211内可以包含一个或更多个电极组件22。电极组件22主要由正极极片和负极极片卷绕或层叠放置形成，并且通常在正极极片与负极极片之间设有隔离膜，隔离膜用于分隔正极极片和负极极片，以避免正极极片和负极极片内接短路。正极极片和负极极片具有活性物质的部分构成电芯组件的主体部，正极极片和负极极片不具有活性物质的部分各自构成极耳221。正极极耳和负极极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳221连接电极端子25以形成电流回路。
电极引出件23为用于将电池单体20的电能引出的部件，电极引出件23连接于电极端子25，汇流部件30(请参见图2)连接于电极引出件23。
电极引出件23和端盖212之间设置有绝缘结构，用于绝缘隔离电极引出件23与端盖212。
请参见图3，并进一步参见图4，图4为本申请一些实施例提供的电极引出件的立体图，图5为本申请一些实施例提供的电极引出件与第一壁的装配示意图。根据本申请的一些实施例，本申请提供了一种电池单体20，电池单体20包括外壳21、电极组件22及电极引出件23。外壳21具有第一壁213，电极组件22设置于外壳21内，电极引出件23安装于第一壁213；电极引出件23用于将电极组件22的电能引出。其中，电极引出件23包括第一表面23b，第一表面23b所在的平面与第一壁213相交，第一表面23b用于与汇流部件30(请参见图2)连接。
第一壁213为外壳21的一个壁，第一壁213与其他壁围成外壳21的容纳空间，电极组件22设置于该容纳空间内。
图中，字母Z所指示的方向为第一壁213的厚度方向。
第一表面23b为电极引出件23的用于与汇流部件30连接的表面。第一表面23b所在的平面与第一壁213相交，可以为第一表面23b所在的平面与第一壁213的厚度方向Z平行，或者，可以为第一表面23b所在的平面与第一壁213的厚度方向Z倾斜设置。例如，第一表面23b所在的平面与第一壁213之间的角度θ为60°～120°；较优地，第一表面23b所在的平面与第一壁213之间的角度θ为85°～95°；优选地，第一表面23b所在的平面可以垂直于第一壁213，也即，第一表面23b所在的平面可以与第一壁213的厚度方向Z平行，以便于第一表面23b与汇流部件30连接。第一表面23b为在电池单体20的长度方向上，电极引出件23最靠近第一壁213边缘的面。
请参照图6，电极引出件23可以为块状结构，电极引出件23的第一表面23b用于与汇流部件30连接。
根据本申请实施例的电池单体20，第一表面23b所在的平面与第一壁213相交，以便于汇流部件30与电极引出件23的焊接，提高了汇流部件30与电极引出件23的装配便捷性，从而提高了由该电池单体20构成的电池100的装配效率。例如，当第一表面23b所在的平面垂直于第一壁213时，汇流部件30与电极引出件23能够在平行于第一壁213的方向上进行焊接，提高装配便利性。
根据本申请的一些实施例，第一表面23b所在的平面与第一壁213垂直。
需要指出的是，第一表面23b所在的平面与第一壁213垂直是指，第一表面23b所在的平面与第一壁213之间的角度θ约等于90°，例如，角度θ可以为85°～95°，具体地，角度θ可以为85°、86°、87°、88°、89°、90°、91°、92°、93°、94°或95°。
根据本申请的一些实施例，如图4和图5所示，电极引出件23还包括第二表面23a，第二表面23a所在的平面与第一表面23b相交，第二表面23a的面积为D1，第一表面23b的面积为D2，满足0.1≤D2/D1≤10。
在第二表面23a上有凹槽、通孔或台阶孔时，第二表面23a的面积为去掉凹槽、通孔或台阶孔所占用的第二表面23a的面积。
第一表面23b是一个平面，第一表面23b的面积为该平面的面积，第一表面23b是电极引出件23用于与汇流部件贴合的面。
第一表面23b的面积D2和第二表面23a的面积D1的比值满足上述关系，可以兼顾电池100的能量密度及过流面积。当D2/D1＜0.1时，D2过小，汇流部件30与电极引出件23的焊接面积过小，影响过流能力；或，D1过大，电极引出件23在垂直于第一壁213的厚度方向Z的方向上占用面积过大，占用电极组件22的空间，影响能量密度。当10＜D2/D1时，D2过大，电极引出件23在第一壁213的厚度方向Z上占用的空间过大，影响能量密度；或，D1过小，极耳221与电极引出件23之间的电连接部件(如电极端子)和电极引出件23之间的连接面积过 小，影响过流能力。
第二表面23a为电极引出件23的位于外壳21的外部的表面，第二表面23a沿第一壁213的厚度方向Z凸出于第一壁213。
根据本申请的一些实施例，0.5≤D2/D1≤2。
当第一表面23b的面积D2与第二表面23a的面积D1的比值满足0.5≤D2/D1≤2时，相较于0.1≤D2/D1＜0.5和2＜D2/D1≤10时，电极引出件23与汇流部件30的焊接面积、电极引出件23与电极端子的焊接面积能够进一步得到保证，过流能力更优，且电极引出件23占用的面积较小，电池100的能量密度更大。
根据本申请的一些实施例，如图4和图5所示，沿第一壁213的厚度方向Z，第一表面23b的尺寸为W1，满足1mm≤W1≤10mm，优选地，2mm≤W1≤5mm。
在上述方案中，沿第一壁213的厚度方向Z，第一表面23b的尺寸W1满足上述关系，使得第一表面23b与汇流部件30能够具有较大的连接面积，以便于第一表面23b与汇流部件30连接。
根据本申请的一些实施例，如图4和图5所示，电极引出件23还包括第二表面23a，第二表面23a所在的平面与第一表面23b相交，电极引出件23设置于第一壁213的背离电池单体20(请参见图3)内部的一侧，电极引出件23包括第一部分231和第二部分232，第一部分231与电极组件22的极耳221电连接，第二部分232用于连接汇流部件30(请参见图2)，第二表面23a为第一部分231远离第一壁213的表面，第一表面23b为第二部分232的表面。
第一部分231和第二部分232为电极引出件23的两个组成部分，通过第一部分231和第二部分232实现电极引出件23与极耳221和汇流部件30的电连接。
在上述方案中，电极引出件23设置于第一壁213的背离电池单体20内部的一侧，以便于电极引出件23与汇流部件30连接；第一部分231和第二部分232分别用于实现与极耳221和汇流部件30的连接，第一部分231与极耳221可以通过电极端子25(请参见图3)连接，有利于提高电极引出件23与电极端子25的连接面积和电极引出件23与汇流部件30的连接面积。
如图7和图9所示，根据本申请的一些实施例，电池单体20还包括电极端子25，第一壁213设置有电极引出孔2131，电极端子25的一端连接第一部分231，电极端子25的另一端通过电极引出孔2131与电极组件22的极耳221电连接。
电极端子25的另一端通过电极引出孔2131与电极组件22的极耳221电连接的方式可以为，电极端子25可以穿设于电极引出孔2131，电极端子25的靠近外壳21内部的一端与电极组件22的极耳221电连接；或者，转接件26穿设于电极引出孔2131，电极端子25通过穿设于电极引出孔2131的转接件与电极组件22的极耳221电连接。
第一部分231和电极组件22的极耳221通过电极端子25电连接，以将电极组件22的电能引导至电极引出件23，以便于电极引出件23将电极组件22的电能引出。
根据本申请的一些实施例，如图4和图5所示，沿第一壁213的厚度方向Z，至少部分第二部分232超出于第一部分231。
至少部分第二部分232超出第一部分231，可以为第二部分232的一部分超出第一部分231，也可以为第二部分232整体超出第一部分231。
第一部分231可以垂直于与第二部分232，也即，第一部分231和第二部分232之间的角度可以为90°；或者，第一部分231和第二部分232也可以倾斜设置，第一部分231和第二部分232之间的角度也可以为锐角或钝角。
请参照图7，至少部分第二部分232超出第一部分231可以由多种实现方式，比如第二部分232由第一部分231朝远离第一壁213的方向延伸形成，这时电极引出件23大体呈“└”形；“└”的水平段为第一部分231，“└”的竖直段为第二部分232。
请参照图8，也可以为第二部分232由第一部分231朝靠近第一壁213的方向延伸形成，这时电极引出件23大体呈“┌”形；“┌”的水平段为第一部分231，“┌”的竖直段为第二部分232。第一部分231在第一部分231靠近第二部分232的方向上延伸超出第一壁213，第二部分232由第一部分231超出第一壁213的部分向靠近第一壁213的方向延伸。此时第二部分232在外壳21外侧，与汇流部件的连接更便捷。
示例性的，参照图8，在垂直于第一表面23b的方向上，第二部分232的投影与壳体211的投影部分重叠，也即，外壳21包括壳体211和端盖212，第一壁213为端盖212，在端盖212的厚度方向上，第二部分232与壳体211部分重叠，上述方案可以增大第二部分232的尺寸，从而增大第一表面23b的面积，方便汇流部件30的焊接。
示例性的，汇流部件30为平板结构。
请参照图9，也可以为第二部分232由第一部分231既朝靠近第一壁213的方向延伸，又朝远离第一壁213的方向延伸，这时电极引出件23大体呈“├”，“├”的水平段为第一部分231，“├”的竖直段为第二部分 232。第二部分232在外壳21外侧延伸，与汇流部件的连接更便捷且第一表面23b的可焊接面积更大。
示例性的，参照图9，在垂直于第一表面23b的方向上，第二部分232的投影与壳体211的投影部分重叠，且沿第一壁213指向电极引出件23的方向，第二部分232超过与第一壁213相邻的电池单体20的凹部2141，上述方案可以增大第二部分232的尺寸，从而增大第一表面23b的面积，方便汇流部件30的焊接。示例性的，汇流部件30为平板结构。
请参照图10，比如第二部分232由第一部分231的中部朝远离第一壁213的方向延伸形成，这时电极引出件23大体呈“┴”，“┴”的水平段为第一部分231，“┴”的竖直段为第二部分232。
在上述方案中，至少部分第二部分232沿第一壁213的厚度方向Z超出第一部分231，以增大第一表面23b的面积，便于第二部分232与汇流部件30的连接和增大连接面积。
请参照图7，根据本申请的一些实施例，电极引出件23超出第一壁213的边缘，第一表面23b位于电极引出件23的超出第一壁213的部分。
如图7所示，电极引出件23的一部分超出第一壁213的边缘，沿垂直于第一壁213的方向观察，电极引出件23的投影的一部分位于第一壁213的外部，第一表面23b的投影与第一壁213不重叠，以便于电极引出件23与汇流部件30电连接。
此种方案中，汇流部件30可以为平板结构，汇流部件30的结构简单，以便于加工制造。
根据本申请的一些实施例，电极引出件23包括第一部分231和第二部分232，第一部分231与电极组件22的极耳221电连接，第二部分232用于连接汇流部件30，第二部分232超出第一壁213的边缘，第二部分232沿第一壁213的厚度方向Z延伸且凸出于第一部分231，第一表面23b为第二部分232背离第一部分231的表面。
第二部分232与第一部分231在平行于第一壁213的方向上排布，沿第一壁213的厚度方向Z，第二部分232的投影与第一壁213不重叠。
由于第二部分232用于连接汇流部件30，第二部分232超出第一壁213的边缘，第一表面23b为第二部分232远离第一部分231的表面，所以，当汇流部件30与第一表面23b连接时，汇流部件30可以与第一壁213具有一定的距离，降低汇流部件30与第一壁213干涉的风险，以及降低汇流部件30与外壳21接触短路的风险，以便于汇流部件30与电极引出件23的装配。
根据本申请的一些实施例，如图4和图5所示，第一部分231和第二部分232沿第一方向X排列，第一表面23b为第二部分232沿第一方向X背离第一部分231的表面，第一方向X垂直于第一壁213的厚度方向Z。
图中，字母X所指示的方向为第一方向，第一方向X可以为电池单体20的长度方向。第一表面23b垂直于第一壁213时，第一方向X垂直于第一表面23b。
第一表面23b为在第一方向X上，电极引出件23最靠近第一壁213边缘的面。
第二部分232可以相对于第一部分231靠近第一壁213的边缘，以便于实现汇流部件30与电极引出件23的连接。
在上述方案中，第一部分231和第二部分232沿第一方向X排列，第一表面23b为第二部分232沿第一方向X背离第一部分231的表面，方便电极引出件23与汇流部件30的装配。
根据本申请的一些实施例，第一部分231与第一壁213平行。
第一部分231与第一壁213平行，也即第一部分231的厚度方向与第一壁213的厚度方向Z平行。当第一壁213为有凸包的部件时，第一部分231与第一壁213的较平整、面积较大的部分平行。第一部分231与第一壁213平行也指第一部分231与第一壁213相对设置，或者说，第一部分231最大的面与第一壁213相对设置，并不意味着，第一部分231沿第一壁213的厚度方向Z设置的两个表面均要与第一壁213平行。
在上述方案中，第一部分231与第一壁213平行，便于实现第一部分231的装配。
根据本申请的一些实施例，如图4和图5所示，至少部分第二部分232沿背离第一壁213的方向延伸且超出第二表面23a。
至少部分第二部分232超出第二表面23a，可以为第二部分232的一部分超出第二表面23a，或者，也可以为第二部分232整体超出第二表面23a。
第二部分232可以垂直于第二表面23a所在的平面，也即，第二部分232和第二表面23a之间的角度可以为90°；或者，第二部分232和第二表面23a所在的平面也可以倾斜设置，第二部分232和第二表面23a所在的平面之间的角度也可以为锐角或钝角。
在上述方案中，至少部分第二部分232沿第一壁213的厚度方向Z超出第二表面23a，使得至少部分第二部分232位于第二表面23a的背离第一壁213的一侧，以降低第二部分232与汇流部件30连接时与第一壁213的干涉。
根据本申请的一些实施例，如图4和图5所示，电极引出件23还包括第三部分233，第三部分233连接第一部分231和第二部分232。
第三部分233也是电极引出件23的组成部分。第三部分233连接第一部分231和第二部分232，可以为第三部分233与第一部分231和第二部分232一体成型，或者，也可以为第三部分233固定于第一部分231和第二部分232，例如，第三部分233焊接于第一部分231和第二部分232。可选地，第一部分231、第三部分233和第二部分232一体成型，例如，第一部分231、第三部分233和第二部分232冲压或折弯成型。
在上述方案中，第三部分233连接第一部分231和第二部分232，使得第一部分231和第二部分232之间可以具有一定的距离，以便于电极引出件23和汇流部件30的连接。
根据本申请的一些实施例，如图4和图5所示，第三部分233包括第一段2331和第二段2332，第一段2331从第一部分231朝着背离第一壁213(请参见图3)的方向延伸，第二段2332连接第一段2331和第二部分232，第一段2331和第二部分232之间形成有间隙。
第一段2331和第二段2332为第三部分233的两个组成部分。第一段2331从第一部分231朝着第一壁213的方向延伸，也即第一段2331位于第一部分231远离第一壁213的一侧。第二段2332连接第一段2331和第二部分232，第一段2331与第二部分232之间形成有间隙，也即，至少部分第二段2332位于第一段2331和第二部分232之间。
在上述方案中，第一段2331和第二部分232之间形成间隙，以便于电极引出件23能够变形，以吸收电池单体20膨胀时产生的膨胀应力。
根据本申请的一些实施例，如图4和图5所示，第二部分232从第二段2332朝着靠近第一壁213(请参见图3)的方向延伸，第一段2331、第二段2332及第二部分232形成U形结构。
第二部分232从第二段2332朝着靠近第一壁213的方向延伸，第二部分232可以与第一段2331平行，或者，第二部分232与第一段2331倾斜设置。可选地，第二部分232与第一段2331平行。
在上述方案中，第一段2331、第二段2332及第二部分232形成U形结构，结构简单，便于成型。
请参见图3，并进一步参见图11和图12，图11为本申请一些实施例提供的支撑件、第一绝缘件和第二绝缘件的结构示意图，图12为本申请一些实施例提供的电池单体的部分结构的剖视图。根据本申请的一些实施例，电池单体20还包括支撑件241，支撑件241插设于间隙内。
支撑件241插设于间隙内，支撑件241能够在汇流部件30连接于第二部分232时支撑第二部分232，便于第二部分232与汇流部件30的连接。
支撑件241插设于间隙内时，支撑件241可以与第一段2331的围成间隙的表面接触，或者，支撑件241可以与第二部分232的围成间隙的表面接触，又或者，支撑件241可以与第一段2331的围成间隙的表面接触且与第二部分232的围成间隙的表面接触。
根据本申请的一些实施例，支撑件241的相对的两面分别与第一段2331和第二部分232接触。
如图12所示，支撑件241的位于间隙的相对的两面分别与第一段2331的围成间隙的表面和第二部分232的围成间隙的表面接触。支撑件241与第一段2331和第二部分232接触，支撑件241能够起到限位的作用，限制第二部分232的位置移动，以便于第二部分232与汇流部件30连接稳定。
根据本申请的一些实施例，支撑件241为绝缘材质，沿第二方向Y，支撑件241超出第三部分233的两端，第二方向Y垂直于第一壁213的厚度方向Z且平行于第一表面23b。
图中，字母Y所指示的方向为第二方向，第二方向Y可以为电池单体20的宽度方向。
支撑件241可以为塑料、橡胶等。
支撑件241为绝缘材质，并且支撑件241沿第二方向Y超出第三部分233的两端，具有较好的绝缘效果。
根据本申请的一些实施例，如图3、图11和图12所示，电池单体20还包括第一绝缘件242，至少部分第一绝缘件242设置于第一壁213与第一部分231之间，以绝缘隔离第一壁213与第一部分231。
第一绝缘件242的材质可以为塑料、橡胶等。
至少部分第一绝缘件242设置于第一壁213与第一部分231之间，可以为第一绝缘件242的一部分设置于第一壁213与第一部分231之间，或者，也可以为第一绝缘件242整体设置于第一壁213与第一部分231之间。
在上述方案中，通过至少部分第一绝缘件242设置于第一壁213与第一部分231之间，将第一壁213与第一部分231分隔，提高了电池单体20的安全性。
根据本申请的一些实施例，支撑件241连接于第一绝缘件242。
支撑件241连接于第一绝缘件242，可以为支撑件241与第一绝缘件242一体成型，例如支撑件241与第一绝缘件242热塑成型，或者，也可以为支撑件241与第一绝缘件242卡接、粘接等。
在上述方案中，支撑件241连接于第一绝缘件242，使得支撑件241与第一绝缘件242的连接稳定，以便于支撑件241支撑第二部分232。
根据本申请的一些实施例，沿第二方向Y，第一绝缘件242超出第一部分231的两端，第二方向Y垂直于第一壁213的厚度方向Z且平行于第一表面23b。
第一绝缘件242沿第二方向Y超出第一部分231的两端，以使第一部分231与第一壁213具有较好的绝缘效果。
根据本申请的一些实施例，如图3、图11和图12所示，电池单体20还包括第二绝缘件243，至少部分第二绝缘件243设置于第二部分232与第一壁213之间，以绝缘隔离第二部分232与第一壁213。
第二绝缘件243的材质可以为塑料、橡胶等。
至少部分第二绝缘件243设置于第二部分232与第一壁213之间，可以为第二绝缘件243的一部分设置于第二部分232与第一壁213之间，或者，也可以为第二绝缘件243整体设置于第二部分232与第一壁213之间。
在上述方案中，通过第二绝缘件243设置于第二部分232与第一壁213之间，将第二部分232与第一壁213绝缘分隔，提高了电池单体20的安全性。
根据本申请的一些实施例，第二绝缘件243连接于第一绝缘件242。
第二绝缘件243连接于第一绝缘件242，可以为第二绝缘件243与第一绝缘件242一体成型，例如第二绝缘件243与第一绝缘件242热塑成型，或者，也可以为第二绝缘件243与第一绝缘件242卡接、粘接等。
在上述方案中，第二绝缘件243连接于第一绝缘件242，第二绝缘件243与第一绝缘件242的连接稳定，两者可以一体成型，以便于装配定位。
根据本申请的一些实施例，第二部分232的远离第二段2332的一端抵接于第二绝缘件243。
第二部分232的远离第二段2332的一端抵接于第二绝缘件243，能够限制第二绝缘件243沿第一壁213的厚度方向Z移动。
根据本申请的一些实施例，沿第二方向Y，第二绝缘件243超出第二部分232的两端，第二方向Y垂直于第一壁213的厚度方向Z且平行于第一表面23b。
第二绝缘件243沿第二方向Y超出第二部分232的两端，以使第二部分232与第一壁213具有较好的绝缘效果。
请参见图13，图13为本申请另一些实施例提供的电极引出件的结构示意图。根据本申请的一些实施例，第一部分231的厚度大于第三部分233的厚度，和/或，第二部分232的厚度大于第三部分233的厚度。
图中，字母H1所指示的尺寸为第一部分231的厚度，字母H2所指示的尺寸为第三部分233的厚度，字母H3所指示的尺寸为第二部分232的厚度。
在电极引出件23展开时，第一部分231的厚度方向、第二部分232的厚度方向以及第三部分233的厚度方向均与第一壁213的厚度方向Z平行；在电极引出件23折弯后，第二部分和第三部分233形成的结构呈U形，故而第三部分233的厚度方向对应改变。
需要指出的是，这里指出的第一部分231的厚度是指，第一部分231未设凹槽、通孔或台阶孔等结构的位置的厚度。
在第一部分231的厚度大于第三部分233的厚度的实施例中，第一部分231的厚度较大，能够增强第一部分231的强度，降低第一部分231和极耳221与电极引出件23之间的电连接部件(如电极端子25)焊接时焊穿第一部分231的风险，满足焊接需求。
在第二部分232的厚度大于第三部分233的厚度的实施例中，第二部分232的厚度较大，能够降低第二部分232与汇流部件30焊接时焊穿第二部分232的风险，满足焊接需求。
在第一部分231的厚度大于第三部分233的厚度、第二部分232的厚度大于第三部分233的厚度的实施例中，第一部分231和第二部分232均具有较厚的厚度，能够满足焊接需求，降低第一部分231和第二部分232被焊穿的风险。
请参见图13，并进一步参见图14，图14为图13的俯视图。根据本申请的一些实施例，第一部分231、第三部分233和第二部分232沿第一方向X依次排列，第三部分233沿第二方向Y的尺寸大于第一部分231沿第二方向Y的尺寸，第三部分233沿第二方向Y的尺寸大于第二部分232沿第二方向Y的尺寸，第一方向X、第二方向Y和第一壁213的厚度方向Z两两垂直。
第一方向X为第一部分231、第三部分233和第二部分232的排列方向。
图中，字母L1所指示的尺寸为第一部分231沿第二方向Y的尺寸，字母L3所指示的尺寸为第三部分233沿第二方向Y的尺寸，字母L2所指示的尺寸为第二部分232沿第二方向Y的尺寸。
在第一部分231的厚度大于第三部分233的厚度，和/或，第二部分232的厚度大于第三部分233的厚度的实施例中，由于第三部分233的厚度较小，沿第二方向Y，相较于第一部分231和第二部分232，第三部分233的尺寸最大，能够使得第三部分233具有较大的过流面积，以满足过流需求。
请参见图13和图14，并进一步参见图15至图17，图15为本申请一些实施例提供的第一部分的过流截面的示意图，图16为本申请一些实施例提供的第三部分的过流截面的示意图，图17为本申请一些实施例提供的第二部分的过流截面的示意图。根据本申请的一些实施例，第一部分231的过流截面积为S1，第三部分233的过流截面积为S2，第二部分232的过流截面积为S3；其中，0.2≤S1/S2≤5，0.2≤S2/S3≤5，0.2≤S1/S3≤5；优选地，0.5≤S1/S2≤2，0.5≤S2/S3≤2，0.5≤S1/S3≤2。
可选地，第一部分231的过流截面积S1与第三部分233的过流截面积S2的比值S1/S2可以为0.2、0.5、1、1.5、2、2.5、3、3.5、4、4.5、5等。
可选地，第三部分233的过流截面积S2与第二部分232的过流截面积S3的比值S2/S3可以为0.2、0.5、1、1.5、2、2.5、3、3.5、4、4.5、5等。
可选地，第一部分231的过流截面积S1与第二部分232的过流截面积S3的比值S1/S3可以为0.2、0.5、1、1.5、2、2.5、3、3.5、4、4.5、5等。
S1＝H1*L1，S2＝H2*L2，S3＝H4*L3。其中，H4为第二部分232在平行于第一壁213的厚度方向Z上的尺寸。
第一部分231的过流面积S1、第二部分232的过流面积S2及第三部分233的过流面积S3满足0.2≤S1/S2≤5、0.2≤S2/S3≤5、0.2≤S1/S3≤5，使得电极引出件23整体具有较佳的过流能力。
当0.5≤S1/S2≤2、0.5≤S2/S3≤2、0.5≤S1/S3≤2时，相较于0.2≤S1/S2≤5、0.2≤S2/S3≤5、0.2≤S1/S3≤5，使得电极引出件23整体的过流能力更佳。
根据本申请的一些实施例，第一部分231的厚度为H1，满足0.2mm≤H1≤5mm，优选地，0.5mm≤H1≤4mm；或第三部分233的厚度为H2，满足0.2mm≤H2≤2mm，优选地，0.3mm≤H2≤1.2mm；或第二部分232的厚度为H3，满足0.2mm≤H3≤5mm，优选地，0.5mm≤H3≤4mm。
可选地，第一部分231的厚度H1可以为0.2mm、0.25mm、0.5mm、0.75mm、1mm、1.25mm、1.5mm、1.75mm、2mm、2.25mm、2.5mm、2.75mm、3mm、3.25mm、3.5mm、3.75mm、4mm、4.25mm、4.5mm、4.75mm、5mm等。
可选地，第三部分233的厚度H2可以为0.2mm、0.3mm、0.4mm、0.5mm、0.6mm、0.7mm、0.8mm、0.9mm、1mm、1.1mm、1.2mm、1.3mm、1.4mm、1.5mm、1.6mm、1.7mm、1.8mm、1.9mm、2mm等。
可选地，第二部分232的厚度H3可以为0.2mm、0.25mm、0.5mm、0.75mm、1mm、1.25mm、1.5mm、1.75mm、2mm、2.25mm、2.5mm、2.75mm、3mm、3.25mm、3.5mm、3.75mm、4mm、4.25mm、4.5mm、4.75mm、5mm等。
第一部分231的厚度H1满足上述关系，在第一部分231具有较佳的过流能力的情况下，第一部分231不易被焊穿，提高电池100的装配安全性；第三部分233的厚度H2满足上述关系，在使得第三部分233具有较大的过流面积的情况下，便于第三部分233折弯；第二部分232的厚度H3满足上述关系，在第二部分232具有较佳的过流能力的情况下，第二部分232不易被焊穿，提高电池100的装配安全性。
相较于0.2mm≤H1＜0.5mm，当0.5mm≤H1≤4mm时，第一部分231的厚度H1不易被焊穿，电池100装配时具有较高的安全性；相较于4mm＜H1≤5mm，当0.5mm≤H1≤4mm时，第一部分231在第一壁213的厚度方向Z上占用较小的空间，使得电池100具有较高的能量密度。
相较于0.2mm≤H2＜0.3mm，当0.3mm≤H2≤1.2mm时，第三部分233的厚度H2较厚，不易折断；相较于1.2mm＜H2≤2mm，当0.3mm≤H2≤1.2mm时，第三部分233的厚度H2较薄，易于折弯，便于第三部分233折弯。
相较于0.2mm≤H3＜0.5mm，当0.5mm≤H3≤4mm时，第二部分232的厚度H3不易被焊穿，电池100装配时具有较高的安全性；相较于4mm＜H3≤5mm，当0.5mm≤H3≤4mm时，第二部分232在垂直于第一表面23b的方向上占用较小的空间，减少成本。
请参见图3和图12，根据本申请的一些实施例，电池单体20还包括电极端子25，第一壁213设置有电极引出孔2131，电极端子25穿设于电极引出孔2131，电极端子25的一端连接电极引出件23，电极端子25的另一端与电极组件22的极耳221电连接。
电极端子25为导电部件，电极端子25可以为圆柱体，以便于加工制造。可选地，电极引出孔2131可以为圆孔。
在电极引出件23设置于第一壁213的背离电池单体20内部一侧的实施例中，电极端子25穿设于电极引出孔2131，便于实现电极端子25与电极引出件23的连接。
根据本申请的一些实施例，如图3和图4所示，电极端子25的数量和电极引出孔2131的数量均为多个，电极端子25与电极引出孔2131一一对应，电极引出件23设置有第一凹槽234，第一凹槽234位于相邻两个电极端子25之间。
可选地，电极端子25的数量和电极引出孔2131的数量均为两个。
第一凹槽234为电极引出件23的凹陷部位，能够减小电极引出件23的重量。
电极端子25的数量和电极引出孔2131的数量均为多个，具有较佳的过流能力。第一凹槽234能够在不影响过流的情况下减轻电极引出件23的重量。
根据本申请的一些实施例，如图4所示，第一凹槽234延伸至电极引出件23的边缘。
电极引出件23包括第二表面23a、面向第一绝缘件242的第五表面23c以及侧面23d，第二表面23a背离第一壁213设置，第二表面23a和第五表面23c为电极引出件23沿第一壁213的厚度方向Z相对设置的两个表面，电极引出件23的侧面23d连接第二表面23a和第五表面23c。第一凹槽234由第五表面23c朝向第二表面23a凹陷形成。
第一凹槽234延伸至电极引出件23的边缘是指，第一凹槽234延伸至电极引出件23的侧面23d。
在上述方案中，第一凹槽234延伸至电极引出件23的边缘，以便于电极引出件23的边缘加工第一凹槽234，降低加工难度。
根据本申请的一些实施例，第一凹槽234沿电极引出件23的厚度方向贯穿电极引出件23，减小电极引出件23的重量。
请参见图3和图12，并进一步参见图18和图19，图18为本申请一些实施例提供的电池单体的剖视图，图19为图18的A处局部放大图。根据本申请的一些实施例，电池单体20还包括第一绝缘件242，至少部分第一绝缘件242设置于第一壁213与电极引出件23之间，以绝缘隔离第一壁213与电极引出件23，第一绝缘件242包括第一凸起2421，第一凸起2421插设于第一凹槽234内。
第一绝缘件242包括背离第一壁213的第六表面242a和面向第一壁213的第七表面242b，第一凸起2421凸出于第六表面242a。
在上述方案中，通过第一绝缘件242绝缘隔离第一壁213与电极引出件23，使得第一壁213与电极引出件23分隔；第一凸起2421插设于第一凹槽234内，以便于对电极引出件23进行定位。
根据本申请的一些实施例，如图19所示，第一壁213包括背离电池单体20内部的第三表面213a，第三表面213a形成有第二凸起2132，以加强第一壁213的强度。
在一些实施例中，第一绝缘件242包括第二凹槽2422，第二凸起2132插设于第二凹槽2422内。
第一壁213还包括面向电池单体20内部的第四表面(图中未示出)，第三表面213a和第四表面为第一壁213的厚度方向Z上相对的两个表面，第二凸起2132凸出于第三表面213a。
第二凹槽2422设置于第七表面242b。
在上述方案中，通过第二凸起2132与第二凹槽2422配合，实现对第一绝缘件242的定位，便于第一绝缘件242与第一壁213的装配。如图16所示，第二凹槽2422可以为通孔。
第二凹槽2422与第一凸起2421在第一壁213的厚度方向Z上对应设置，以合理利用第一绝缘件242的空间。
根据本申请的一些实施例，如图12所示，电池单体20还包括转接件26，电极引出件23可以与极耳221通过电极端子25和转接件26电连接。例如，如图12所示，极耳221连接于转接件26，转接件26连接于电极端子25，电极端子25连接于电极引出件23，从而实现极耳221与电极引出件23的电连接。
如图12所示，电池单体20还包括第三绝缘件27，第三绝缘件27设置于第一壁213的面向电池单体20内部的一侧，第三绝缘件27设置于第一壁213与转接件26之间，用于绝缘隔离第一壁213和电极端子25。
可以理解的，电池单体20也可以不包括转接件26，这时，极耳与电极端子连接。
根据本申请的一些实施例，外壳21包括沿第一壁213的厚度方向Z相对设置的第一壁213和第二壁214，和沿第一方向X相对设置的第三壁和第四壁，以及沿第二方向Y相对设置的第五壁和第六壁，第三壁的面积和第四壁的面积均小于第一壁213的面积，第三壁的面积和第四壁的面积均小于第二壁的面积，第五壁的面积和第六壁的面积均小于第一壁213的面积，第五壁的面积和第六壁的面积均小于第二壁214的面积，第一方向、第二方向和第一壁的厚度方向两两垂直。
在一些实施例中，第一壁213为外壳21的所有壁中面积最大的壁。
电池单体20可以呈长方体形，第一壁213可以为电池单体20的所有壁中面积最大的壁，换句话说，电池单体20的大面设置为第一壁213。第一壁213的厚度方向Z可以为电池单体20的厚度方向。
需要指出的是，在上述壁中，壁的面积为，沿垂直于该壁的方向观察，该壁的投影的面积为该壁的面积。
根据本申请的一些实施例，如图3所示，外壳21包括壳体211和端盖212，壳体211具有开口，端盖212封闭开口，第一壁213为端盖212。
第一壁213为端盖212，便于电极引出件23的装配。
请参见图2，并进一步参见图20和图21，图20为图2的B处局部放大图，图21为本申请一些实施例提供的回流部件的结构示意图。根据本申请的一些实施例，本申请提供了一种电池100，电池100包括箱体10、汇流部件30及多个如上述实施例提供的电池单体20。汇流部件30容纳于箱体10内；多个电池单体20容纳于箱体10内，多个电池单体20沿第一壁213的厚度方向Z堆叠设置，多个电池单体20的电极引出件23通过汇流部件30电连接。
根据本申请实施例的电池100，采用上述的电池单体20，能够提高电池单体20的电极引出件23与汇流部件30的装配效率，进而提高电池100的装配效率。
根据本申请的一些实施例，在第一壁213的厚度方向Z上，汇流部件30的端部的投影与第一壁213至少部分重叠。
汇流部件30的端部的投影与第一壁213至少部分重叠，以便于节省装配空间，使得电池100的内部部件的结构紧凑，提高电池100的能量密度。
根据本申请的一些实施例，如图20所示，电极引出件23与汇流部件30焊接连接并形成焊印区P，沿第一壁213的厚度方向Z，第一表面23b(请参见图4)的尺寸为W1，焊印区P的尺寸为W2，满足0.01≤W2/W1≤0.5，优选地，0.1≤W2/W1≤0.3。
可选地，焊印区P的尺寸W2与第一表面23b的尺寸W1的比值W2/W1可以为0.01、0.05、0.1、0.15、0.2、0.25、0.3、0.35、0.4、0.45、0.5等。
焊印区P为电极引出件23与汇流部件30焊接连接后，在电极引出件23与汇流部件30的焊接位置形成的显示焊印的区域。
焊印区P的尺寸W2与第一表面23b的尺寸W1的比值满足上述关系，使得焊接部位过流能力较佳、连接强度较高、电池单体20的安全性较好。如果焊印区P的尺寸W2与第一表面23b的尺寸W1的比值过小，则导致焊接部位过流能力不佳、连接强度不足；如果焊印区P的尺寸W2与第一表面23b的尺寸W1的比值过大，则可能导致局部焊接位置超出第二部分，使得局部绝缘结构被烧熔，影响电池100的装配安全性。
相较于0.01≤W2/W1＜0.1，当0.1≤W2/W1≤0.3时，焊接部位具有较佳的过流能力、连接强度较高；相较于0.3＜W2/W1≤0.5，当0.1≤W2/W1≤0.3时，使得焊接部位和电极引出件23与极耳221连接的位置具有较大的重叠面积，使得电池100装配过程中具有较高的焊接安全性。
根据本申请的一些实施例，沿第二方向Y，第一表面23b(请参见图4)的尺寸为F1，焊印区P的尺寸为F2，满足0.01≤F2/F1≤0.5，优选地，0.1≤F2/F1≤0.3，第二方向Y垂直于第一壁213的厚度方向Z并平行于第一表面23b。
可选地，焊印区P在第二方向Y上的尺寸F2与第一表面23b在第二方向Y上的尺寸F1的比值F2/F1可以为0.01、0.05、0.1、0.15、0.2、0.25、0.3、0.35、0.4、0.45、0.5等。
焊印区P在第二方向Y上的尺寸F2与第一表面23b在第二方向Y上的尺寸F1的比值满足上述关系，使得焊接部位过流能力较佳、连接强度较高、电池单体20的安全性较好。如果焊印区P在第二方向Y上的尺寸F2与第一表面23b在第二方向Y上的尺寸F1的比值过小，则导致焊接部位过流能力不佳、连接强度不足；如果焊印区P在第二方向Y上的尺寸F2与第一表面23b在第二方向Y上的尺寸F1的比值过大，则可能导致局部焊接部位超出第二部分，使得局部绝缘结构被烧熔，影响电池100的装配安全性。
相较于0.01≤F2/F1＜0.1，当0.1≤F2/F1≤0.3时，焊接部位具有较佳的过流能力、连接强度较高；相较于0.3＜F2/F1≤0.5，当0.1≤F2/F1≤0.3时，使得焊接部位和电极引出件23与极耳221连接的位置具有较大的重叠面积，使得电池100装配过程中具有较高的焊接安全性。
根据本申请的一些实施例，第一表面23b的面积为M1，焊印区P的面积为M2，满足0.01≤M1/M2≤0.5，优选地，0.1≤M1/M2≤0.3。
其中，M1＝W1*F1，M2＝W2*F2。
可选地，第一表面23b的面积M1与焊印区P的面积M2的比值M1/M2可以为0.01、0.05、0.1、0.15、0.2、0.25、0.3、0.35、0.4、0.45、0.5等。
在上述方案中，第一表面23b的面积M1与焊印区P的面积M2的比值满足上述关系，焊印部位过流能力较佳、连接强度较高、电池单体20的安全性较好。如果焊印区P的面积M2与第一表面23b的面积M1的比值过小，则导致焊接部位过流能力不佳、连接强度不足；当汇流部件30与电极引出件23激光焊接时，如果焊印区P的面积M2与第一表面23b的面积M1的比值过大，则导致局部焊接位置超出电极引出件23与极耳221连接的位置，使得局部绝缘结构烧熔和漏激光，影响电池100的装配安全性。
相较于0.01≤M2/M1＜0.2，当0.2≤M2/M1≤0.3时，焊接部位具有较佳的过流能力、连接强度较高；相较于0.3＜M2/M1≤0.5，当0.2≤M2/M1≤0.3时，使得焊接部位和电极引出件23与极耳221连接的位置具有较大的重叠面积，使得电池100装配过程中具有较高的焊接安全性。
根据本申请的一些实施例，如图21所示，汇流部件30包括底壁31、两个侧壁32和两个翻边部33， 两个侧壁32沿第一壁213的厚度方向Z相对设置，底壁31连接两个侧壁32，每个翻边部33从对应的侧壁32的远离底壁31的一端向背离另一个侧壁32的方向延伸，两个翻边部33分别与两个电池单体20的电极引出件23连接。
底壁31的沿第一壁213的厚度方向Z的两端分别连接两个侧壁32，两个翻边部33与两个侧壁32对应设置。
汇流部件30为折弯结构，也即底壁31、两个侧壁32和两个翻边部33一体成型，侧壁32相对于底壁31折弯，翻边部33相对于侧壁32折弯。
多个电池单体20包括相邻的第一电池单体和第二电池单体，汇流部件30用于连接第一电池单体的电极引出件23和第二电池单体的电极引出件23，汇流部件30绕过第一电池单体的平行于第一壁213的厚度方向Z的侧壁，使得汇流部件30的一个翻边部33连接至第一电池单体的电极引出件23，汇流部件30的另一个翻边部33连接至第二电池单体的电极引出件23。
在上述方案中，汇流部件30的结构形式，便于实现汇流部件30与两个电池单体20的电极引出件23的第一表面23b连接，使得电池100的内部部件的结构紧凑。
根据本申请的一些实施例，如图12所示，外壳21还具有与第一壁213相对设置的第二壁214，第二壁214的边缘的第一区域内陷形成凹部2141，在多个电池单体20堆叠设置时，凹部2141用于容纳与第二壁214相邻的电池单体20的至少部分电极引出件23。
第二壁214和第一壁213为外壳21的沿第一壁213的厚度方向Z相对设置的两个壁。
第一区域为第二壁214的边缘的区域，沿第一壁213的厚度方向Z，第一区域与第一壁213的安装电极引出件23的区域相对应。第一区域沿第一壁213的厚度方向Z朝向第一壁213凹陷形成凹部2141。
与第二壁214相邻的电池单体20的电极引出件23可以部分位于凹部2141内，或者，与第二壁214相邻的电池单体20的电极引出件23可以全部位于凹部2141内。
在一些实施例中，凹部2141的凹陷深度大于电极引出件23凸出第一壁213的高度。可以理解的，与第二壁214相邻的电池单体20的电极引出件23也可以只有部分容纳于凹部2141内。
第二壁214的表面可以设置有绝缘层，以便于在多个电池单体20堆叠设置时，第二壁214与相邻电池单体20的电极引出件23绝缘隔离。绝缘层也可以设置在电极引出件23远离第一壁的表面，以便在多个电池单体20堆叠设置时，电极引出件23可以与第一壁213相邻的电池单体的第二壁214绝缘隔离。
在上述方案中，在多个电池单体20堆叠时，凹部2141的设置，能够容纳与第二壁214相邻的电池单体20的电极引出件23，合理利用装配空间，使得电池100具有较高的能量密度。
请参照图7，根据本申请的一些实施例，汇流部件30为平板结构。
在电极引出件23超出第一壁213的边缘，第一表面23b位于电极引出件23的超出第一壁213的部分的实施例中，汇流部件30可以为平板结构，汇流部件30的结构简单，便于加工制造，制造成本低。
请参照图7，根据本申请的一些实施例，电极引出件23至少部分容纳于与第一壁213相邻的电池单体20的凹部2141，电极引出件23包括第一部分231和第二部分232，第一部分231与电极组件22的极耳221电连接，第二部分232用于连接汇流部件30，第二部分232超出第一壁213的边缘，第二部分232沿第一壁213的厚度方向Z延伸且凸出于第一部分231，第一表面23b为第二部分232背离第一部分231的表面，沿第一壁213指向电极引出件23的方向，第二部分232超出与第一壁213相邻的电池单体20的凹部2141。
第一表面23b在垂直于第一表面23b的方向上的投影位于凹部2141的外部，以便于汇流部件30与第一表面23b连接。
第二部分232超出相邻的电池单体20的凹部2141是指，沿垂直于第一表面23b的方向观察，第二部分232的部分投影落入凹部2141，第二部分232的另一部分投影位于凹部2141的外部，且沿第一壁213的厚度方向Z，该部分投影位于该凹部2141的远离与该凹部2141相对的电池单体20的第一壁213的一侧。例如，电池单体20可以具有沿第一方向X相对设置的第三壁215和第四壁，以第三壁215为例，沿垂直于第一表面23b的方向观察，第二部分232的部分投影落入凹部2141，第二部分232的另一部分投影与第三壁215重叠。
根据本申请的一些实施例，请参照图8、9，外壳21包括壳体211和端盖212，壳体211具有开口，端盖212封闭开口，第一壁为端盖212，在垂直于第一表面23b的方向上，第二部分232的投影与壳体211的投影部分重叠。
沿垂直于第一表面23b的方向观察，第二部分232的投影与壳体211部分重叠，使得第二部分232在端盖212与壳体211的排列方向上具有较大的尺寸，从而使得第一表面23b在端盖212与壳体211的排列方向上具有较大的面积，以使得汇流部件30与电极引出件23具有较大的连接面积，进而使得汇流部件30与电极引出件23连接牢固。
在上述方案中，第一表面23b位于凹部2141的外部，且第一表面23b超出相邻的电池单体20的凹部2141，第一表面23b在第一壁213的厚度方向Z上具有较大的尺寸，以便于电极引出件23与第一表面23b具有较大的连接面积，从而使得电极引出件23与汇流部件30连接牢固。
请参照图22，根据本申请的一些实施例，电池100还包括隔离层40，隔离层40设置于电极引出件23的面向外壳21的表面，隔离层40用于绝缘隔离电极引出件23与外壳21。
隔离层40为绝缘件，隔离层40可以粘贴于电极引出件23的面向相邻的电池单体20的外壳21的表面，或者，隔离层40可以粘贴于电极引出件23的面向设置该电极引出件23的电池单体20的外壳21的表面。隔离层40的材质可以为塑料、塑胶。
隔离层40可以设置于电极引出件23的一个表面或者多个表面。隔离层40可以呈L字形设置，隔离层40可以设置于电极引出件23的相邻的两个表面。
在上述方案中，隔离层40的设置，用于绝缘隔离电极引出件23与相邻的电池单体20的外壳21或者设置电极引出件23的电池单体20的外壳21，提高电池100的安全性。
根据本申请的一些实施例，沿第一壁213的厚度方向Z，相邻的两个电池单体20的相邻的两个电极引出件23具有相背离的两个端部，汇流部件30的两端分别与两个端部齐平。汇流部件30的一端与相邻两个电池单体20中一者的电极引出件23的靠近第一壁213的一端平齐，汇流部件30的另一端与相邻两个电池单体20中另一者的电极引出件23的背离第一壁213的一端齐平；
在一些实施例中，沿第二方向Y，汇流部件30的相对的两端分别与电极引出件23的相对的两端齐平，第二方向Y、第一壁213的厚度方向Z、汇流部件30的厚度方向两两垂直。
汇流部件30的厚度方向可以与第一表面23b垂直。
例如，沿第一壁213的厚度方向Z，汇流部件30的一端与一个电池单体20的电极引出件23的靠近该电池单体20的第一壁213的一端齐平，汇流部件30的另一端与相邻的一个电池单体20的电极引出件23的背离该电池单体20的第一壁213的一端齐平。换句话说，汇流部件30的两端分别与两个电池单体20的两个电极引出件23的相背离的两端齐平。
在上述方案中，汇流部件30在第一壁213的厚度方向Z上的两端分别与相邻的两个电池单体20的电极引出件23的相背离的两个端部齐平，以便于在第一壁213的厚度方向Z对汇流部件30和对应的电极引出件23定位，便于汇流部件30与电极引出件23的连接；汇流部件30的沿第二方向Y的相对的两端分别与电极引出件23的沿第二方向Y的相对的两端齐平，以便于在第二方向Y上对汇流部件30和对应的电极引出件23定位，便于汇流部件30与电极引出件23的连接。
根据本申请的一些实施例，本申请还提供了一种用电设备，用电设备包括上述任一实施例提供的电池单体20，电池单体20用于提供电能。
用电设备可以为前述任一应用电池单体20的装置或系统。
根据本申请的一些实施例，请参见图2至图22，本申请提供了一种电池单体20，该电池单体20呈扁平式长方体。电池单体20包括外壳21、电极组件22、电极引出件23、电极端子25、支撑件241、第一绝缘件242、第二绝缘件243。外壳21包括壳体211和端盖，壳体211具有开口，端盖封闭开口，电极组件22设置于壳体211内，端盖为第一壁213。电极组件22的极耳221从电池单体20的长度方向的两端延伸出。电极引出件23设置于第一壁213的背离电池单体20内部的一侧。第一壁213设置有电极引出孔2131，电极端子25穿设于电极引出孔2131，电极端子25的一端与极耳221通过转接件26电连接。电极引出件23包括第一部分231、第二部分232和第三部分233，第一部分231、第三部分233和第二部分232沿第一方向X依次排列，第三部分233包括第一段2331和第二段2332，第一段2331从第一部分231朝着背离第一壁213的方向延伸，第二段2332连接第一段2331和第二部分232，第二部分232从第二段2332朝着靠近第一壁213的方向延伸，第二部分232与第一部分231平行，第一段2331和第二部分232之间形成有间隙，第一段2331、第二段2332及第二部分232形成U形结构。第一部分231具有远离底壁31的第二表面23a，第二部分232具有沿第一方向X背离第一部分231的第一表面23b，第一部分231与第一壁213平行，沿第一壁213的厚度方向Z，至少部分第二部分232超出第二表面23a。支撑件241插设于间隙内。至少部分第一绝缘件242设置于第一壁213和电极引出件23的第一部分231之间。至少部分第二绝缘件243设置于第二部分232与第一壁213之间，第二绝缘件243、支撑件241和第一绝缘件242一体成型。第二部分232的远离第二段2332的一端抵接于第二绝缘件243。第一绝缘件242设置有用于与电极端子25配合的第二通孔2423。电极引出件23设置有用于与电极端子25配合的第一通孔235，第一通孔235沿第一壁213的厚度方向Z由第五表面23c延伸至第二表面23a，电极端子25的另一端穿过第二通孔2423插设于第一通孔235内，电极端子25与电极引出件23铆接。第一表面23b与第一壁213的厚度方向Z平行，第一表面23b用于与汇流部件30焊接。
根据本申请实施例的电池单体20，第一表面23b与第一壁213的厚度方向Z平行，以便于汇流部件30与电极引出件23焊接，提高了由该电池单体20构成的电池100的装配效率。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (49)

  1. 一种电池单体，包括：
    外壳，具有第一壁；
    电极组件，设置于所述外壳内；
    电极引出件，安装于所述第一壁，用于将所述电极组件的电能引出；
    其中，所述电极引出件包括第一表面，所述第一表面所在平面与所述第一壁相交，所述第一表面用于与汇流部件连接。
  2. 根据权利要求1所述的电池单体，其中，所述电极引出件还包括第二表面，所述第二表面所在的平面与所述第一表面相交，所述第二表面的面积为D1，所述第一表面的面积为D2，满足0.1≤D2/D1≤10。
  3. 根据权利要求2所述的电池单体，其中，0.5≤D2/D1≤2。
  4. 根据权利要求1-3中任一项所述的电池单体，其中，沿所述第一壁的厚度方向，所述第一表面的尺寸为W1，满足1mm≤W1≤10mm，优选地，2mm≤W1≤5mm。
  5. 根据权利要求1-4中任一项所述的电池单体，其中，所述电极引出件还包括第二表面，所述第二表面所在的平面与所述第一表面相交，所述电极引出件设置于所述第一壁的背离所述电池单体内部的一侧，所述电极引出件包括第一部分和第二部分，所述第一部分与所述电极组件的极耳电连接，所述第二部分用于连接所述汇流部件，所述第二表面为所述第一部分远离所述第一壁的表面，所述第一表面为所述第二部分的表面。
  6. 根据权利要求5所述的电池单体，其中，所述电池单体还包括：
    电极端子，所述第一壁设置有电极引出孔，所述电极端子的一端连接所述第一部分，另一端通过所述电极引出孔与所述电极组件的极耳电连接。
  7. 根据权利要求5或6所述的电池单体，其中，沿所述第一壁的厚度方向，至少部分所述第二部分超出于所述第一部分。
  8. 根据权利要求5-7中任一项所述的电池单体，其中，所述第一部分和所述第二部分沿第一方向排列，所述第一表面为所述第二部分沿所述第一方向背离所述第一部分的表面，所述第一方向垂直于所述第一壁的厚度方向。
  9. 根据权利要求5-8中任一项所述的电池单体，其中，所述第一部分与所述第一壁平行。
  10. 根据权利要求5-9中任一项所述的电池单体，其中，至少部分所述第二部分沿背离所述第一壁的方向延伸且超出所述第二表面。
  11. 根据权利要求5-10中任一项所述的电池单体，其中，所述电极引出件还包括第三部分，所述第三部分连接所述第一部分和所述第二部分。
  12. 根据权利要求11所述的电池单体，其中，所述第三部分包括第一段和第二段，所述第一段从所述第一部分朝着背离所述第一壁的方向延伸，所述第二段连接所述第一段和所述第二部分，所述第一段和所述第二部分之间形成有间隙。
  13. 根据权利要求12所述的电池单体，其中，所述第二部分从所述第二段朝着靠近所述第一壁的方向延伸，所述第一段、所述第二段及所述第二部分形成U形结构。
  14. 根据权利要求12或13所述的电池单体，其中，所述电池单体还包括：
    支撑件，插设于所述间隙内。
  15. 根据权利要求14所述的电池单体，其中，所述支撑件的相对的两面分别与所述第一段和所述第二部分接触。
  16. 根据权利要求14所述的电池单体，其中，所述支撑件为绝缘材质，沿第二方向，所述支撑件超出所述第三部分的两端，所述第二方向垂直于所述第一壁的厚度方向且平行于所述第一表面。
  17. 根据权利要求14-16中任一项所述的电池单体，其中，所述电池单体还包括：
    第一绝缘件，至少部分设置于所述第一壁与所述第一部分之间，以绝缘隔离所述第一壁与所述第一部分。
  18. 根据权利要求17所述的电池单体，其中，所述支撑件连接于所述第一绝缘件。
  19. 根据权利要求17或18所述的电池单体，其中，沿第二方向，所述第一绝缘件超出所述第一部分的两端，所述第二方向垂直于所述第一壁的厚度方向且平行于所述第一表面。
  20. 根据权利要求17-19中任一项所述的电池单体，其中，所述电池单体还包括：
    第二绝缘件，至少部分设置于所述第二部分与所述第一壁之间，以绝缘隔离所述第二部分与所述第一壁。
  21. 根据权利要求20所述的电池单体，其中，所述第二绝缘件连接于所述第一绝缘件。
  22. 根据权利要求20或21所述的电池单体，其中，所述第二部分的远离所述第二段的一端抵接于所述第二绝缘件。
  23. 根据权利要求20-22中任一项所述的电池单体，其中，沿第二方向，所述第二绝缘件超出所述第二部分的两端，所述第二方向垂直于所述第一壁的厚度方向且平行于所述第一表面。
  24. 根据权利要求11-23中任一项所述的电池单体，其中，所述第一部分的厚度大于所述第三部分的厚度，和/或，所述第二部分的厚度大于所述第三部分的厚度。
  25. 根据权利要求24所述的电池单体，其中，所述第一部分、所述第三部分和所述第二部分沿第一方向依次排列，所述第三部分沿第二方向的尺寸大于所述第一部分沿所述第二方向的尺寸，所述第三部分沿所述第二方向的尺寸大于所述第二部分沿所述第二方向的尺寸，所述第一方向、所述第二方向和所述第一壁的厚度方向两两垂直。
  26. 根据权利要求24或25所述的电池单体，其中，所述第一部分的过流截面积为S1，所述第三部分的过流截 面积为S2，所述第二部分的过流截面积为S3；
    其中，0.2≤S1/S2≤5，0.2≤S2/S3≤5，0.2≤S1/S3≤5；优选地，0.5≤S1/S2≤2，0.5≤S2/S3≤2，0.5≤S1/S3≤2。
  27. 根据权利要求11-26中任一项所述的电池单体，其中，
    所述第一部分的厚度为H1，满足0.2mm≤H1≤5mm，优选地，0.5mm≤H1≤4mm；或
    所述第三部分的厚度为H2，满足0.2mm≤H2≤2mm，优选地，0.3mm≤H2≤1.2mm；或
    所述第二部分的厚度为H3，满足0.2mm≤H3≤5mm，优选地，0.5mm≤H3≤4mm。
  28. 根据权利要求1-27中任一项所述的电池单体，其中，所述电池单体还包括：
    电极端子，所述第一壁设置有电极引出孔，所述电极端子穿设于所述电极引出孔，所述电极端子的一端连接所述电极引出件，另一端与所述电极组件的极耳电连接。
  29. 根据权利要求28所述的电池单体，其中，所述电极端子的数量和所述电极引出孔的数量均为多个，所述电极端子与所述电极引出孔一一对应，所述电极引出件设置有第一凹槽，所述第一凹槽位于相邻两个所述电极端子之间。
  30. 根据权利要求29所述的电池单体，其中，所述第一凹槽延伸至所述电极引出件的边缘。
  31. 根据权利要求29或30所述的电池单体，其中，所述电池单体还包括：
    第一绝缘件，至少部分设置于所述第一壁与所述电极引出件之间，以绝缘隔离所述第一壁与所述电极引出件，所述第一绝缘件包括第一凸起，所述第一凸起插设于所述第一凹槽内。
  32. 根据权利要求31所述的电池单体，其中，所述第一壁包括背离所述电池单体内部的第三表面，所述第三表面形成有第二凸起，所述第一绝缘件包括第二凹槽，所述第二凸起插设于所述第二凹槽内。
  33. 根据权利要求1-32中任一项所述的电池单体，其中，所述电极引出件超出所述第一壁的边缘，所述第一表面位于所述电极引出件的超出所述第一壁的部分。
  34. 根据权利要求33所述的电池单体，其中，所述电极引出件包括第一部分和第二部分，所述第一部分与所述电极组件的极耳电连接，所述第二部分用于连接所述汇流部件，所述第二部分超出所述第一壁的边缘，所述第二部分沿所述第一壁的厚度方向延伸且凸出于所述第一部分，所述第一表面为所述第二部分背离所述第一部分的表面。
  35. 根据权利要求1-34中任一项所述的电池单体，其中，所述第一表面所在的平面与所述第一壁垂直。
  36. 根据权利要求1-35中任一项所述的电池单体，其中，所述外壳包括沿所述第一壁的厚度方向相对设置的所述第一壁和第二壁、沿第一方向相对设置的第三壁和第四壁、以及沿第二方向相对设置的第五壁和第六壁，所述第三壁的面积和所述第四壁的面积均小于所述第一壁的面积，所述第三壁的面积和所述第四壁的面积均小于所述第二壁的面积，所述第五壁的面积和所述第六壁的面积均小于所述第一壁的面积，所述第五壁的面积和所述第六壁的面积均小于所述第二壁的面积，所述第一壁的厚度方向、所述第一方向和所述第二方向两两垂直。
  37. 根据权利要求1-36中任一项所述的电池单体，其中，所述外壳包括壳体和端盖，所述壳体具有开口，所述端盖封闭所述开口，所述第一壁为所述端盖。
  38. 一种电池，包括：
    箱体；
    汇流部件，容纳于所述箱体内；
    多个如权利要求1-37中任一项所述的电池单体，容纳于所述箱体内，多个所述电池单体沿所述第一壁的厚度方向堆叠设置，多个所述电池单体的所述电极引出件通过所述汇流部件电连接。
  39. 根据权利要求38所述的电池，其中，在所述第一壁的厚度方向上，所述汇流部件的端部的投影与所述第一壁至少部分重叠。
  40. 根据权利要求38或39所述的电池，其中，所述电极引出件与所述汇流部件焊接连接并形成焊印区，沿所述第一壁的厚度方向，所述第一表面的尺寸为W1，所述焊印区的尺寸为W2，满足0.01≤W2/W1≤0.5，优选地，0.1≤W2/W1≤0.3。
  41. 根据权利要求40所述的电池，其中，沿第二方向，所述第一表面的尺寸为F1，所述焊印区的尺寸为F2，满足0.01≤F2/F1≤0.5，优选地，0.1≤F2/F1≤0.3，所述第二方向垂直于所述第一壁的厚度方向并平行于所述第一表面。
  42. 根据权利要求40或41所述的电池，其中，所述第一表面的面积为M1，所述焊印区的面积为M2，满足0.01≤M1/M2≤0.5，优选地，0.1≤M1/M2≤0.3。
  43. 根据权利要求38-42中任一项所述的电池，其中，所述汇流部件包括底壁、两个侧壁和两个翻边部，所述两个侧壁沿所述第一壁的厚度方向相对设置，所述底壁连接所述两个侧壁，每个所述翻边部从对应的所述侧壁的远离所述底壁的一端向背离另一个所述侧壁的方向延伸，所述两个翻边部分别与两个所述电池单体的所述电极引出件连接。
  44. 根据权利要求38所述的电池，其中，所述外壳还具有与所述第一壁相对设置的第二壁，所述第二壁的边缘的第一区域内陷形成凹部，所述凹部用于容纳与所述第二壁相邻的所述电池单体的至少部分所述电极引出件。
  45. 根据权利要求44所述的电池，其中，所述电极引出件超出所述第一壁的边缘，所述第一表面位于所述电极引出件的超出所述第一壁的部分，所述汇流部件为平板结构。
  46. 根据权利要求45所述的电池，其中，所述电极引出件至少部分容纳于与所述第一壁相邻的所述电池单体的所述凹部，所述电极引出件包括第一部分和第二部分，所述第一部分与所述电极组件的极耳电连接，所述第二部分用于连接所述汇流部件，所述第二部分超出所述第一壁的边缘，所述第二部分沿所述第一壁的厚度方向延伸且凸出于所述第一部分，所述第一表面为所述第二部分背离所述第一部分的表面；
    沿所述第一壁指向所述电极引出件的方向，所述第二部分超出与所述第一壁相邻的所述电池单体的所述凹部；和/或
    所述外壳包括壳体和端盖，所述壳体具有开口，所述端盖封闭所述开口，所述第一壁为所述端盖，在垂直于所述第一表面的方向上，所述第二部分的投影与所述壳体的投影部分重叠。
  47. 根据权利要求46所述的电池，其中，所述电池还包括隔离层，所述隔离层设置于所述电极引出件的面向所述外壳的表面，所述隔离层用于绝缘隔离所述电极引出件与所述外壳。
  48. 根据权利要求46或47所述的电池，其中，沿所述第一壁的厚度方向，相邻两个所述电池单体的相邻的两个所述电极引出件具有相背离的两个端部，所述汇流部件的两端分别与两个所述端部齐平；和/或，
    沿第二方向，所述汇流部件的相对的两端分别与所述电极引出件的相对的两端齐平，所述第二方向、所述第一壁的厚度方向、所述汇流部件的厚度方向两两垂直。
  49. 一种用电设备，包括如权利要求1-37中任一项所述的电池单体，所述电池单体用于提供电能。
PCT/CN2022/138044 2022-06-30 2022-12-09 电池单体、电池及用电设备 WO2024001058A1 (zh)

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