WO2025035797A1 - 电池及用电设备 - Google Patents

电池及用电设备 Download PDF

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Publication number
WO2025035797A1
WO2025035797A1 PCT/CN2024/086662 CN2024086662W WO2025035797A1 WO 2025035797 A1 WO2025035797 A1 WO 2025035797A1 CN 2024086662 W CN2024086662 W CN 2024086662W WO 2025035797 A1 WO2025035797 A1 WO 2025035797A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing surface
side wall
box body
battery
sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/086662
Other languages
English (en)
French (fr)
Inventor
吴凯
施思
王亚雷
林柏青
张文辉
产利兵
蒋于伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to KR1020267002469A priority Critical patent/KR20260029450A/ko
Priority to EP24853213.7A priority patent/EP4726887A1/en
Publication of WO2025035797A1 publication Critical patent/WO2025035797A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/102Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/183Sealing members
    • H01M50/184Sealing members characterised by their shape or structure
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/183Sealing members
    • H01M50/186Sealing members characterised by the disposition of the sealing members
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204Racks, modules or packs for multiple batteries or multiple cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, and in particular to a battery and an electrical device.
  • Batteries are widely used in electronic devices, transportation, power tools, drones, energy storage devices, etc. As the application environment and conditions become more and more complex, higher requirements are placed on the energy density of batteries.
  • the embodiments of the present application provide a battery and an electrical device to improve the energy density of the battery.
  • an embodiment of the present application provides a battery, comprising a battery cell, a first box body and a second box body; the first box body comprises a first sealing surface; the second box body comprises a first surface and a second sealing surface, the first surface being used to support the battery cell; the first box body and the second box body together enclose a closed space for accommodating the battery cell, the first sealing surface cooperates with the second sealing surface to seal the closed space; the first sealing surface intersects with the first surface, and the second sealing surface intersects with the first surface.
  • both the first sealing surface and the second sealing surface intersect with the first surface, that is, the first sealing surface is not parallel to the first surface, and the second sealing surface is not parallel to the first surface.
  • the first sealing surface and the second sealing surface both intersect with the first surface, which can reduce the space occupied by the first sealing surface and the second sealing surface in the direction parallel to the first surface and intersecting with the first sealing surface and the second seal, thereby improving the space utilization of the battery in the direction parallel to the first surface and intersecting with the first sealing surface and the second seal, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volume energy density of the battery.
  • At least one of the first sealing surface and the second sealing surface is perpendicular to the first surface.
  • At least one of the first sealing surface and the second sealing surface is perpendicular to the first surface, which can reduce the space occupied by the one of the first sealing surface and the second sealing surface perpendicular to the first surface in the direction parallel to the first surface and intersecting the first sealing surface and the second sealing surface, so that the one of the first sealing surface and the second sealing surface perpendicular to the first surface makes full use of the space in the direction perpendicular to the first surface, which is beneficial to improving the volume energy density of the battery.
  • one of the first sealing surface and the second sealing surface is perpendicular to the first surface, and the other of the first sealing surface and the second sealing surface is non-perpendicular to and intersects with the first surface.
  • one of the first sealing surface and the second sealing surface is perpendicular to the first surface, and the other is non-perpendicular to and intersects with the first surface.
  • This can not only reduce the space occupied by the first sealing surface and the second sealing surface in the direction parallel to the first surface and intersecting with the first sealing surface and the second sealing surface, thereby improving the space utilization of the battery in the direction parallel to the first surface and intersecting with the first sealing surface and the second sealing surface, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volume energy density of the battery, but also make full use of the space in the direction perpendicular to the first surface, thereby further improving the volume energy density of the battery.
  • one of the first sealing surface and the second sealing surface, which is perpendicular to the first surface, is located on a side of the other away from the closed space.
  • the one of the first sealing surface and the second sealing surface that is perpendicular to the first surface is located on the side of the other away from the closed space, and the one of the first sealing surface and the second sealing surface that is not perpendicular to the first surface is arranged close to the closed space, which can make full use of the internal space of the box formed by the first box body and the second box body, reduce the external dimensions of the battery, and is conducive to improving the volume energy density of the battery.
  • the second sealing surface is perpendicular to the first surface, and the second sealing surface is located on a side of the first sealing surface away from the closed space.
  • the second sealing surface is perpendicular to the first surface and is located on the side of the first sealing surface away from the closed space, which not only enables the second sealing surface to utilize the space in the direction perpendicular to the first surface, but also facilitates the assembly of the first box body and the second box body.
  • the first box body includes a first end wall and a first side wall connected to each other, and the first sealing surface is arranged on the first side wall;
  • the second box body includes a second end wall and a second side wall connected to each other, the second end wall has the first surface and is arranged opposite to the first end wall along a first direction, the first direction is perpendicular to the first surface, and the second sealing surface is arranged on the second side wall.
  • the first box body includes a first end wall and a first side wall connected to each other, and the second box body includes a second end wall and a second side wall connected to each other.
  • the first box body and the second box body can be conveniently enclosed to form a closed space for accommodating a battery cell.
  • the first sealing surface is arranged on the first side wall
  • the second sealing surface is arranged on the second side wall, so that the area of the first sealing surface and the second sealing surface can be larger, so as to form a good connection relationship and good sealing performance with the second sealing surface, so that the battery has higher reliability
  • the structure of the first box body and the second box body is simple. Easy to manufacture.
  • the first sealing surface is non-perpendicular to and intersects with the first surface, and the first side wall and the first end wall are connected at an obtuse angle; or, the second sealing surface is non-perpendicular to and intersects with the first surface, and the second side wall and the second end wall are connected at an obtuse angle.
  • the first side wall and the first end wall are connected at an obtuse angle, so that the first sealing surface and the first surface do not intersect perpendicularly, which facilitates the filling of sealant or the setting of a sealing gasket in the space between the first sealing surface and the second sealing surface, and is conducive to forming a reliable sealing relationship between the first box body and the second box body.
  • the second side wall and the second end wall are connected at an obtuse angle, so that the second sealing surface and the first surface do not intersect perpendicularly, which facilitates the filling of sealant or the setting of a sealing gasket in the space between the first sealing surface and the second sealing surface, and is conducive to forming a reliable sealing relationship between the first box body and the second box body.
  • the first sealing surface and the second sealing surface jointly form a sealant containing space for containing sealant.
  • the first sealing surface and the second sealing surface jointly form a glue holding space for accommodating sealant.
  • sealant By arranging sealant in the glue holding space, not only the sealing performance of the closed space can be improved, but also the first sealing surface and the second sealing surface can be bonded by the sealant to improve the connection stability of the first box body and the second box body. If the sealant bonds the first sealing surface and the second sealing surface, there is no need to set other connecting parts to connect the first box body and the second box body, thereby reducing the steps of battery assembly and saving costs.
  • a projection of the adhesive holding space at least partially overlaps with a projection of the battery cell.
  • the projection of the glue holding space when projected along the first direction, the projection of the glue holding space at least partially overlaps with the projection of the battery cell, so that the glue holding space can occupy as little space as possible in the direction parallel to the first surface, and make full use of the space in the direction perpendicular to the first surface. While occupying as little space as possible in the direction parallel to the first surface, the glue holding space has a larger sealing area to improve the sealing between the first sealing surface and the second sealing surface, so that the battery has higher reliability.
  • the battery further includes a glue blocking structure, and the glue blocking structure is arranged at the junction of the closed space and the glue containing space.
  • a glue blocking structure is provided at the junction of the closed space and the glue containing space.
  • the glue blocking structure can limit the sealant arranged in the glue containing space from overflowing into the closed space or overflowing out of the closed space, thereby reducing the waste of sealant and enabling the battery to have better sealing performance, which is beneficial to improving the sealing reliability of the battery.
  • the glue blocking structure is disposed on the second side wall.
  • the glue blocking structure is arranged on the second side wall, so as to reduce the risk of interference between the glue blocking structure and the battery cell.
  • the glue blocking structure is a first protrusion convexly provided on the inner surface of the second side wall, and the first box body is supported on the first protrusion.
  • the glue blocking structure is a first protrusion protruding from the inner surface of the second side wall, which can not only prevent the sealant in the glue containing space from overflowing into the closed space, but also support the first box body and limit the movement of the first box body in the direction close to the second box body, so that the closed space can maintain a larger size.
  • the glue blocking structure is a groove arranged on the inner surface of the second side wall, and a portion of the first box body is located in the groove.
  • the glue blocking structure is a groove arranged on the inner surface of the second side wall, which can not only prevent the sealant in the glue containing space from overflowing into the closed space, but also reduce the weight of the second box body. Such a glue blocking structure will not interfere with the structure in the closed space.
  • the second side wall is bent from the end of the second end wall along the first direction toward the side away from the battery cell to form a recess, and the first side wall is inserted into the recess; or, the first side wall is bent from the end of the first end wall along the first direction toward the side away from the battery cell to form a recess, and the second side wall is inserted into the recess; the recess is used to accommodate sealant.
  • the second side wall is bent along the first direction from the end of the second end wall toward the side away from the battery cell to form a recess.
  • the recess can be formed without reducing the strength of the second side wall.
  • the first side wall is inserted into the recess, which can limit the first side wall and improve the stability of the cooperation between the first box body and the second box body.
  • a projection of the recess at least partially overlaps with a projection of the battery cell.
  • the projection of the concave portion and the projection of the battery cell at least partially overlap along the first direction, so the battery cell can make full use of the enclosed space to improve the energy density of the battery cell.
  • the battery cell can also prevent the sealant in the concave portion from overflowing into the enclosed space.
  • both the first sealing surface and the second sealing surface are perpendicular to the first surface.
  • the first sealing surface and the second sealing surface are both perpendicular to the first surface.
  • the first sealing surface and the second sealing surface are both perpendicular to the first surface so that the first sealing surface and the second sealing surface are parallel to the first surface and perpendicular to the first surface.
  • the space occupied in the direction where a sealing surface and a second sealing surface intersect each other is the least, so that the first sealing surface and the second sealing surface fully utilize the space in the direction perpendicular to the first surface, thereby improving the space utilization of the battery in the direction parallel to the first surface and intersecting with the first sealing surface and the second sealing surface, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volume energy density of the battery.
  • the first box body includes a first end wall and a first side wall connected to each other, and the first sealing surface is arranged on the first side wall;
  • the second box body includes a second end wall and a second side wall connected to each other, the second end wall has the first surface and is arranged opposite to the first end wall along a first direction, the first direction is perpendicular to the first surface, and the second sealing surface is arranged on the second side wall.
  • the first box body includes a first end wall and a first side wall connected to each other, and the second box body includes a second end wall and a second side wall connected to each other.
  • the first box body and the second box body can be conveniently enclosed to form a closed space for accommodating battery cells.
  • the first sealing surface is arranged on the first side wall, and the second sealing surface is arranged on the second side wall.
  • the area of the first sealing surface and the second sealing surface can be larger, so as to form a good connection relationship and good sealing between the second sealing surface, so that the battery has higher reliability, and the structure of the first box body and the second box body is simple and easy to manufacture.
  • a sealant is filled between the first sealing surface and the second sealing surface.
  • sealant is filled between the first sealing surface and the second sealing surface, which can not only improve the sealing performance of the closed space, but also improve the connection stability of the first box body and the second box body by bonding the first sealing surface and the second sealing surface with the sealant.
  • sealant bonds the first sealing surface and the second sealing surface there is no need to set other connecting parts to connect the first box body and the second box, thereby reducing the steps of battery assembly and saving costs.
  • a projection of the sealant at least partially overlaps with a projection of the battery cell, and the second direction is parallel to the first surface and intersects with the first side wall.
  • the projection of the sealant and the projection of the battery cell at least partially overlap along the second direction, which can reduce the space occupied by the sealant in other directions intersecting with the second direction.
  • the sealant can make full use of the space of the battery in the second direction, which is beneficial to improving the energy density of the battery.
  • the battery further includes a glue blocking structure, and the glue blocking structure is arranged in the closed space near the first sealing surface and the second sealing surface.
  • a glue blocking structure is arranged in the closed space near the first sealing surface and the second sealing surface.
  • the glue blocking structure can limit the sealant arranged in the glue holding space from overflowing into the closed space, thereby reducing the waste of sealant and enabling the battery to have better sealing performance, which is beneficial to improving the sealing reliability of the battery.
  • the glue blocking structure is disposed on the first surface.
  • the glue blocking structure is arranged on the first surface, which facilitates the arrangement of the glue blocking structure.
  • the glue blocking structure is a second protrusion convexly provided on the first surface, and a portion of the first box body is located between the second side wall and the second protrusion.
  • the glue blocking structure is a second protrusion protruding from the first surface, and part of the first box body is located between the second side wall and the second protrusion.
  • the second protrusion can not only prevent the sealant between the first sealing surface and the second sealing surface from overflowing into the closed space, but the second protrusion can also limit the deformation of the first box body in the direction away from the second side wall, so that the closed space maintains a larger size and reduces the risk of interference with the structure in the closed space due to deformation of the first box body in the direction away from the second side wall.
  • the first box body includes a first end wall and a first side wall connected to each other, the first sealing surface is arranged on the first side wall, the second box body includes a second end wall, the first end wall and the second end wall are arranged relative to each other in a first direction, and the first direction is perpendicular to the first surface; the second end wall is provided with a receiving groove, the second sealing surface is provided on the groove wall of the receiving groove, the first side wall is inserted into the receiving groove, and the receiving groove is filled with sealant.
  • the first side wall is inserted into the accommodating groove, which can not only limit the first side wall, but also limit the deformation of the first side wall in the direction toward the closed space or away from the closed space.
  • the accommodating groove is filled with sealant, which can not only improve the sealing performance, but the sealant can also connect the first box body and the second box body in the accommodating groove. Therefore, there is no need to set other connecting parts to connect the first box body and the second box body, thereby reducing the steps of battery assembly and saving costs.
  • a projection of the receiving groove at least partially overlaps with a projection of the battery cell.
  • the projection of the receiving groove and the projection of the battery cell at least partially overlap along the first direction, so the battery cell can make full use of the closed space to improve the energy density of the battery cell.
  • the battery cell can also prevent the sealant in the receiving groove from overflowing into the closed space.
  • an embodiment of the present application provides an electrical device, comprising a battery provided in any of the above embodiments.
  • the electrical device adopts the battery with higher energy density provided above, so it has longer battery life and can meet more electricity needs.
  • FIG1 is a schematic diagram of a vehicle provided in some embodiments of the present application.
  • FIG2 is an exploded view of a battery provided in some embodiments of the present application.
  • FIG3 is a schematic diagram of a first box body and a second box body covered together according to some embodiments of the present application;
  • FIG4 is a schematic diagram of a sealant filled between the first sealing surface and the second sealing surface in FIG3 ;
  • FIG5 is a schematic diagram of a first box body and a second box body covered together according to some other embodiments of the present application.
  • FIG6 is a schematic diagram of a sealant filled between the first sealing surface and the second sealing surface in FIG5 ;
  • FIG7 is a schematic diagram of a first box body and a second box body covered together according to some other embodiments of the present application.
  • FIG8 is a schematic diagram of a sealant filled between the first sealing surface and the second sealing surface in FIG7 ;
  • FIG9 is a cross-sectional view of a battery provided in some embodiments of the present application.
  • FIG10 is a cross-sectional view of a battery provided in some other embodiments of the present application.
  • FIG11 is a schematic diagram of a first box body and a second box body covered together according to some other embodiments of the present application.
  • FIG12 is a cross-sectional view of a battery provided in yet other embodiments of the present application.
  • FIG13 is an enlarged view of point D1 in FIG11 ;
  • FIG14 is a cross-sectional view of a battery provided in some other embodiments of the present application.
  • FIG15 is an enlarged view of point D2 in FIG14 ;
  • FIG16 is a schematic diagram of a first box body and a second box body covered together in some other embodiments of the present application.
  • FIG17 is a schematic diagram of a sealant filled between the first sealing surface and the second sealing surface in FIG16;
  • FIG18 is a schematic diagram of a first box body and a second box body covered together according to some other embodiments.
  • FIG19 is a schematic diagram of a sealant filled between the first sealing surface and the second sealing surface in FIG18;
  • FIG20 is a schematic diagram of a first box body and a second box body covered together provided in yet other embodiments;
  • FIG21 is a schematic diagram of a sealant filled between the first sealing surface and the second sealing surface in FIG20;
  • FIG22 is a cross-sectional view of a battery provided in some other embodiments of the present application.
  • FIG23 is a schematic diagram of a first box body and a second box body covered together in some other embodiments.
  • FIG. 24 is a schematic diagram of the first box body and the second box body after being covered together, provided in yet other embodiments.
  • Icons 1000-vehicle; 100-battery; 10-battery cell; 20-first box; 21-first sealing surface; 22-first end wall; 23-first side wall; 24-third side wall; 30-second box; 31-first surface; 32-second sealing surface; 33-second end wall; 34-second side wall; 35-fourth side wall; 40-sealant; 50-glue retaining structure; 51-first protrusion; 511-first abutting surface; 52-groove; 53-second protrusion; 54-accommodating groove; 200-controller; 300-motor; X-first direction; Y-second direction; Z-third direction; A-enclosed space; B-glue containing space; C-recess.
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.
  • the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in the present application may include a battery module or a battery pack.
  • the battery generally includes a box for encapsulating one or more battery cells. The box can reduce the risk of liquid or other foreign matter affecting the charging or discharging of the battery cells.
  • the battery cell may be a secondary battery.
  • a secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.
  • the battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.
  • a battery cell may include an electrode assembly.
  • the electrode assembly may include a positive electrode, a negative electrode, and a separator.
  • active ions such as lithium ions
  • the separator is arranged between the positive electrode and the negative electrode, which can reduce the risk of short circuit between the positive and negative electrodes, while allowing active ions to pass through.
  • the battery cell may further include an electrolyte, which acts as a conductor of ions between the positive and negative electrodes.
  • the electrolyte may be liquid, gel or solid.
  • the liquid electrolyte may include an electrolyte salt and a solvent.
  • the solid electrolyte may include a polymer solid electrolyte, an inorganic solid electrolyte, and a composite solid electrolyte.
  • the electrode assembly may be a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.
  • the electrode assembly may be cylindrical in shape.
  • the electrode assembly is provided with tabs, which can lead current out of the electrode assembly.
  • the tabs include a positive tab and a negative tab.
  • the battery cell may include a housing.
  • the housing is used to encapsulate components such as the electrode assembly and the electrolyte.
  • the housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.
  • the battery cells may be cylindrical battery cells, prismatic battery cells, pouch battery cells, or battery cells of other shapes.
  • the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery may be a battery module.
  • the multiple battery cells are arranged and fixed to form a battery module.
  • the battery may be a battery pack, which includes a box and a battery cell, wherein the battery cell or battery module is contained in the box.
  • the box may include a first box and a second box, wherein the first box and the second box are connected to form a closed space.
  • the second box has a first surface, and the first surface is used to carry the battery cell.
  • the battery cell is disposed in the closed space to reduce the risk of liquid or other foreign matter affecting the charging or discharging of the battery cell.
  • the box body can be used as a part of the chassis structure of the vehicle.
  • part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.
  • the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.
  • the battery case includes a first case and a second case, the first case and the second case are buckled together to form a closed space for accommodating battery cells, and the first case and the second case are connected by a seal to seal the closed space.
  • the edges of the first case and the second case are both provided with flange structures protruding toward the outside of the battery (usually protruding in a direction parallel to the surface of the case carrying the battery cells), the flange structure of the first case forms a sealing surface, and the flange structure of the second case forms a sealing surface, both sealing surfaces are parallel to the direction parallel to the surface of the case carrying the battery cells, and the sealing interface formed by the sealing surface of the flange structure of the first case and the sealing surface of the flange structure of the second case is also parallel to the direction parallel to the surface of the case carrying the battery cells, however, the protruding flange structure will occupy the space in the direction parallel to the first surface, resulting in low battery space utilization and affecting the volume energy density of the battery
  • the embodiment of the present application provides a battery, the battery includes a battery cell, a first box body and a second box body; the first box body includes a first sealing surface; the second box body includes a first surface and a second sealing surface, the first surface is used to support the battery cell; the first box body and the second box body together enclose a closed space for accommodating the battery cell, and the first sealing surface cooperates with the second sealing surface to seal the closed space; the first sealing surface intersects with the first surface, and the second sealing surface intersects with the first surface.
  • Both the first sealing surface and the second sealing surface intersect with the first surface, that is, the first sealing surface is not parallel to the first surface, and the second sealing surface is not parallel to the first surface.
  • the first sealing surface and the second sealing surface both intersect with the first surface, which can reduce the space occupied by the first sealing surface and the second sealing surface in the direction parallel to the first surface and intersecting with the first sealing surface and the second sealing surface, thereby improving the space utilization of the battery in the direction parallel to the first surface and intersecting with the first sealing surface and the second sealing surface, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volume energy density of the battery.
  • the battery disclosed in the embodiment of the present application can be used in, but not limited to, a battery cabinet, a container-type energy storage device, etc.
  • the energy storage device may include multiple batteries disclosed in the present application.
  • the battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical equipment such as vehicles, ships or aircraft.
  • the battery disclosed in the present application can be used to form a power supply system of the electrical equipment.
  • the embodiment of the present application provides an electric device using a battery as a power source
  • the electric device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, a heavy truck, a bus, a spacecraft, etc.
  • the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc.
  • the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.
  • FIG. 1 is a schematic diagram of a vehicle 1000 provided in some embodiments of the present application.
  • 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 type of the vehicle 1000 may be a sedan, an off-road vehicle, a heavy truck or a bus, etc.
  • a battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, the head or the 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, for the circuit system of the vehicle 1000, such as for the working power requirements during the startup, navigation and operation of the vehicle 1000.
  • the vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .
  • the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.
  • some embodiments of the present application provide a battery 100, which includes a battery cell 10, a first box body 20 and a second box body 30; the first box body 20 includes a first sealing surface 21; the second box body 30 includes a first surface 31 and a second sealing surface 32, and the first surface 31 is used to support the battery cell 10; the first box body 20 and the second box body 30 are jointly enclosed to form a closed space A for accommodating the battery cell 10, and the first sealing surface 21 and the second sealing surface 32 cooperate to seal the closed space A; the first sealing surface 21 intersects with the first surface 31, and the second sealing surface 32 intersects with the first surface 31.
  • the first box body 20 and the second box body 30 together form a box body of the battery 100.
  • the battery cell 10 is contained in a closed space A defined by the first box body 20 and the second box body 30.
  • the battery 100 may include one or more battery cells 10.
  • the plurality of battery cells 10 may be connected in series, in parallel, or in mixed connection, wherein the mixed connection means that the plurality of battery cells 10 are connected in series and in parallel.
  • the second box 30 has a first surface 31 for carrying the battery cell 10.
  • the first surface 31 for carrying the battery cell 10 can be understood as the first surface 31 is the surface of the second box 30 for placing the battery cell 10 or the first surface 31 is the surface of the second box 30 for bearing the main gravity of the battery cell 10.
  • the second box 30 can be regarded as the main part for carrying the battery cell 10.
  • the second box 30 can be used as the lower box of the battery 100, and the surface of the bottom wall of the lower box facing the battery cell 10 can be the first surface 31.
  • the first box 20 can be regarded as the upper box of the battery 100.
  • the first box 20 and the second box 30 cover each other in the first direction X to define a closed space A.
  • the materials of the first box body 20 and the second box body 30 can be respectively aluminum, aluminum alloy, stainless steel or plastic, etc.
  • the materials of the first box body 20 and the second box body 30 can be the same or different.
  • the second box body 30 serves as the main component for supporting the battery cell 10.
  • the second box body 30 can be made of a material with strong structural strength, such as aluminum alloy, steel or other materials with high structural strength.
  • the first box body 20 can be made of a material with low density, such as plastic, so that the mass of the first box body 20 has as little impact on the mass energy density of the battery 100 as possible, which is also beneficial to reducing the weight of the battery 100.
  • the first box body 20 and the second box body 30 are used to provide a closed space A for the battery cell 10.
  • the first box body 20 and the second box body 30 cover each other to define a closed space A for accommodating the battery cell 10.
  • a seal (not shown), which can be a sealing ring, a sealing gasket, a sealant 40, etc.
  • the first box body 20 and the second box body 30 can be in various shapes, such as a cuboid, a cylinder, etc.
  • the first box body 20 can be a hollow structure with an opening on one side to form a receiving cavity for accommodating the battery cell 10
  • the second box body 30 can also be a hollow structure with an opening on one side to form a receiving cavity for accommodating the battery cell 10.
  • the opening side of the first box body 20 covers the opening side of the second box body 30, thereby forming a box body with a closed space A.
  • the first box body 20 can also be a hollow structure with an opening on one side to form a receiving cavity for accommodating the battery cell 10
  • the second box body 30 is a plate-shaped structure, and the second box body 30 covers the opening side of the first box body 20, thereby forming a box body with a closed space A.
  • the second box body 30 can also be a hollow structure with an opening on one side to form a receiving cavity for accommodating the battery cell 10
  • the first box body 20 is a plate-shaped structure
  • the first box body 20 covers the opening side of the second box body 30, thereby forming a box body with a closed space A.
  • the first sealing surface 21 is a surface of the first box body 20 for sealing connection with the second box body 30.
  • the second sealing surface 32 is a surface of the second box body 30 for forming a sealing interface with the first sealing surface 21 of the first box body 20 to seal the closed space A.
  • the first sealing surface 21 and the second sealing surface 32 cooperate to seal the closed space A to reduce the risk of interference of the external environment on the battery cell 10 in the closed space A, so that the battery 100 can work normally and improve the reliability of the battery 100.
  • first box body 20 and the second box body 30 are welded and connected at the first sealing surface 21 and the second sealing surface 32 to achieve a sealed connection; for another example, a sealing gasket is clamped between the first sealing surface 21 and the second sealing surface 32, and the first box body 20 and the second box body 30 are locked by a connecting piece so that the sealing gasket is stably clamped between the first sealing surface 21 and the second sealing surface 32 to achieve sealing; for another example, a sealant 40 is filled between the first sealing surface 21 and the second sealing surface 32, and the sealant 40 bonds the first sealing surface 21 and the second sealing surface 32 to achieve sealing.
  • the first sealing surface 21 and the first surface 31 intersect does not only mean that the first sealing surface 21 and the first surface 31 intersect directly, but also that the extended surface of the first sealing surface 21 intersects with the extended surface of the first surface 31, or the plane where the first sealing surface 21 is located intersects with the plane where the first surface 31 is located.
  • the first sealing surface 21 and the first surface 31 may intersect perpendicularly or non-perpendicularly.
  • the non-perpendicular intersection of the first sealing surface 21 and the first surface 31 means that the first sealing surface 21 and the first surface 31 may intersect at an obtuse angle or an acute angle.
  • the second sealing surface 32 and the first surface 31 intersect does not only mean that the second sealing surface 32 and the first surface 31 intersect directly, but also that the extended surface of the second sealing surface 32 intersects with the extended surface of the first surface 31, or that the plane where the second sealing surface 32 is located intersects with the plane where the first surface 31 is located.
  • the second sealing surface 32 and the first surface 31 can intersect perpendicularly or non-perpendicularly.
  • the non-perpendicular intersection of the second sealing surface 32 and the first surface 31 means that the second sealing surface 32 and the first surface 31 can intersect at an obtuse angle or an acute angle.
  • Both the first sealing surface 21 and the second sealing surface intersect with the first surface 31, that is, the first sealing surface 21 is not parallel to the first surface 31, and the second sealing surface 32 is not parallel to the first surface 31.
  • the first sealing surface 21 and the second sealing surface intersect with the first surface 31, which can reduce the space occupied by the first sealing surface 21 and the second sealing surface 32 in the direction parallel to the first surface 31 and intersecting with the first sealing surface 21 and the second sealing surface 32, thereby improving the space utilization of the battery 100 in the direction parallel to the first surface 31 and intersecting with the first sealing surface 21 and the second sealing surface, so as to accommodate more battery cells 10 or reduce the volume of the battery 100, thereby improving the volume energy density of the battery 100.
  • At least one of the first sealing surface 21 and the second sealing surface 32 is perpendicular to the first surface 31 .
  • first sealing surface 21 and the second sealing surface 32 may intersect the first surface 31 perpendicularly, and the other may intersect the first surface 31 non-perpendicularly.
  • the first sealing surface 21 may intersect the first surface 31 perpendicularly, and the second sealing surface 32 may intersect the first sealing surface 21 non-perpendicularly.
  • the first sealing surface 21 may intersect the first surface 31 non-perpendicularly, and the second sealing surface 32 may intersect the first surface 31 perpendicularly.
  • the first sealing surface 21 and the second sealing surface 32 may both perpendicularly intersect the first surface 31 .
  • At least one of the first sealing surface 21 and the second sealing surface 32 is perpendicular to the first surface 31, which can reduce the space occupied by the one of the first sealing surface 21 and the second sealing surface 32 that is perpendicular to the first surface 31 in a direction parallel to the first surface 31 and intersecting the first sealing surface 21 and the second sealing surface 32, so that the one of the first sealing surface 21 and the second sealing surface 32 that is perpendicular to the first surface 31 fully utilizes the space in the direction perpendicular to the first surface 31, which is beneficial to improving the volume energy density of the battery 100.
  • one of the first sealing surface 21 and the second sealing surface 32 is perpendicular to the first surface 31
  • the other of the first sealing surface 21 and the second sealing surface 32 is non-perpendicular to and intersects the first surface 31 .
  • first sealing surface 21 and the first surface 31 may intersect perpendicularly, and the second sealing surface 32 and the first surface 31 may intersect non-perpendicularly.
  • the second sealing surface 32 and the first surface 31 may intersect perpendicularly, and the first sealing surface 21 and the first surface 31 may not intersect perpendicularly.
  • first sealing surface 21 and the second sealing surface 32 is perpendicular to the first surface 31, and the other is non-perpendicular to and intersects with the first surface 31.
  • This can not only reduce the space occupied by the first sealing surface 21 and the second sealing surface 32 in the direction parallel to the first surface 31 and intersecting with the first sealing surface 21 and the second sealing surface 32, thereby improving the space utilization of the battery 100 in the direction parallel to the first surface 31 and intersecting with the first sealing surface 21 and the second sealing surface, so as to accommodate more battery cells 10 or reduce the volume of the battery 100, thereby improving the volume energy density of the battery 100, but also make full use of the space in the direction perpendicular to the first surface 31, thereby further improving the volume energy density of the battery 100.
  • the one of the first sealing surface 21 and the second sealing surface 32 intersects the first surface 31 perpendicularly and the other intersects the first surface 31 non-perpendicularly, as shown in Figures 3-6, the one of the first sealing surface 21 and the second sealing surface 32 that is perpendicular to the first surface 31 is located on a side of the other away from the enclosed space A.
  • first sealing surface 21 intersects the first surface 31 perpendicularly, and the second sealing surface 32 intersects the first surface 31 non-perpendicularly, the first sealing surface 21 is farther away from the closed space A than the second sealing surface 32 .
  • first sealing surface 21 may be located outside the second sealing surface 32 .
  • the second sealing surface 32 may be located outside the first sealing surface 21 .
  • the one of the first sealing surface 21 and the second sealing surface 32 that is perpendicular to the first surface 31 is located on the side of the other away from the closed space A, and the one of the first sealing surface 21 and the second sealing surface 32 that is not perpendicular to the first surface 31 is arranged close to the closed space A, which can make full use of the internal space of the box formed by the first box body 20 and the second box body 30, reduce the external dimensions of the battery 100, and help to improve the volume energy density of the battery 100.
  • the second sealing surface 32 is perpendicular to the first surface 31 , and the second sealing surface 32 is located on a side of the first sealing surface 21 away from the closed space A.
  • the second sealing surface 32 intersects the first surface 31 perpendicularly, and the second sealing surface 32 is not perpendicular to the first surface 31 .
  • the second sealing surface 32 is perpendicular to the first surface 31 and is located on the side of the first sealing surface 21 away from the closed space A. This not only enables the second sealing surface 32 to utilize the space in the direction perpendicular to the first surface 31 , but also facilitates the assembly of the first box body 20 and the second box body 30 .
  • the arrangement positions of the first sealing surface 21 and the second sealing surface are also different.
  • the first box body 20 includes a first end wall 22 and a first side wall 23 connected to each other, and the first sealing surface 21 is arranged on the first side wall 23;
  • the second box body 30 includes a second end wall 33 and a second side wall 34 connected to each other, the second end wall 33 has a first surface 31 and is arranged opposite to the first end wall 22 along a first direction X, the first direction X is perpendicular to the first surface 31, and the second sealing surface 32 is arranged on the second side wall 34.
  • the first side wall 23 is connected to an end of the first end wall 22 along the second direction Y.
  • the first side wall 23 extends from the first end wall 22 toward a direction close to the second box body 30 .
  • the second direction Y is a direction parallel to the first surface 31, the first direction X is perpendicular to the second direction Y, and the first sealing surface 21 and the second sealing surface 32 may both intersect with the second direction Y.
  • the second direction Y may be the width direction of the battery 100, and the first sealing surface 21 and the second sealing surface 32 both intersect with the first surface 31, then the first sealing surface 21 and the second sealing surface 32 both intersect with the second direction Y, or it can be said that the first sealing surface 21 and the second sealing surface 32 both intersect with the width direction of the battery 100.
  • the first sealing surface 21 and the second sealing surface 32 both intersect with the first surface 31, which can reduce the space occupied by the first sealing surface 21 and the second sealing surface 32 in the second direction Y, thereby improving the space utilization of the battery 100 in the second direction Y, so as to accommodate more battery cells 10 or reduce the volume of the battery 100, thereby improving the volume energy density of the battery 100.
  • the battery 100 has a smaller size in the width direction, which can also help reduce the size of the electrical equipment powered by the battery 100 in the width direction of the battery 100.
  • the heavy truck is powered by the battery 100 provided in the embodiment of the present application, and the size of the heavy truck in the width direction of the battery 100 can be made smaller.
  • the width direction of the battery 100 is substantially the same as the width direction of the heavy truck, that is, the size of the heavy truck in its width direction can be smaller.
  • the first box 20 and the second box 30 can be regarded as covering each other in the height direction of the battery 100 to define a closed space A.
  • the height direction of the battery 100 is substantially consistent with the first direction X.
  • the height direction of the battery 100 can be substantially consistent with the height direction of the heavy truck.
  • the first end wall 22 and the first side wall 23 may be integrally formed.
  • the first end wall 22 and the first side wall 23 may be separately provided and then connected to form the first box body 20.
  • the connection method of the first end wall 22 and the first side wall 23 includes but is not limited to welding connection, adhesive connection, screw connection, etc.
  • the first sealing surface 21 may be at least a portion of a surface of the first side wall 23 facing the closed space A in the second direction Y or at least a portion of a surface away from the closed space A.
  • the second side wall 34 is connected to an end portion of the second end wall 33 along the second direction Y corresponding to the first side wall 23 , and the second side wall 34 extends from the second end wall 33 toward a direction close to the first box body 20 .
  • the second end wall 33 and the second side wall 34 may be integrally formed.
  • the second end wall 33 and the second side wall 34 may be separately provided and then connected to form the second box body 30.
  • the connection method of the second end wall 33 and the second side wall 34 includes but is not limited to welding connection, adhesive connection, screw connection, etc.
  • the surface of the second end wall 33 facing the first end wall 22 in the first direction X is the first surface 31.
  • the second sealing surface 32 may be at least a portion of the surface of the second side wall 34 facing the closed space A in the second direction Y or at least a portion of the surface away from the closed space A.
  • the first box body 20 includes a first end wall 22 and a first side wall 23 connected to each other, and the second box body 30 includes a second end wall 33 and a second side wall 34 connected to each other.
  • the first box body 20 and the second box body 30 can conveniently enclose a closed space A for accommodating the battery cell 10.
  • the first sealing surface 21 is arranged on the first side wall 23, and the second sealing surface 32 is arranged on the second side wall 34.
  • the area of the first sealing surface 21 and the second sealing surface 32 can be larger, so as to form a good connection relationship and good sealing between the second sealing surface 32, so that the battery 100 has higher reliability, and the structure of the first box body 20 and the second box body 30 is simple and easy to manufacture.
  • the first box body 20 includes two first side walls 23, and the two first side walls 23 are respectively connected to the two ends of the first end wall 22 along the second direction Y.
  • the second box body 30 includes two second side walls 34, and the two second side walls 34 are respectively connected to the two ends of the second end wall 33 along the second direction Y.
  • Each first side wall 23 is provided with a first sealing surface 21, and each second side wall 34 is provided with a second sealing surface 32.
  • the first side walls 23 and the second side walls 34 are arranged in a one-to-one correspondence, and the first sealing surfaces 21 and the second sealing surfaces 32 are arranged in a one-to-one correspondence.
  • the first sealing surface 21 of each first side wall 23 cooperates with the second sealing surface 32 of the corresponding second side wall 34 to seal the closed space A in the second direction Y.
  • the first sealing surface 21 is non-perpendicular to the first surface 31 and intersects with it, and the first side wall 23 and the first end wall 22 are connected at an obtuse angle; or, as shown in Figures 7 and 8, the second sealing surface 32 is non-perpendicular to the first surface 31 and intersects with it, and the second side wall 34 and the second end wall 33 are connected at an obtuse angle.
  • the first side wall 23 and the first end wall 22 are connected at an obtuse angle, and the first sealing surface 21 intersects the first surface 31 at an acute angle.
  • the first box body 20 includes two first side walls 23, the two first side walls 23 are connected to the first end wall 22 at an obtuse angle, and the two first side walls 23 are arranged in an eight-shaped pattern.
  • the second side wall 34 and the second end wall 33 are connected at an obtuse angle, and the second sealing surface 32 intersects the first surface 31 at an obtuse angle.
  • the second box body 30 includes two second side walls 34
  • the two second side walls 34 are connected to the second end wall 33 at an obtuse angle
  • the two second side walls 34 are arranged in an inverted eight-shaped pattern.
  • the first side wall 23 and the first end wall 22 are connected at an obtuse angle, so that the first sealing surface 21 and the first surface 31 do not intersect perpendicularly, which facilitates the filling of the sealant 40 or the setting of the sealing gasket in the space between the first sealing surface 21 and the second sealing surface 32, and is conducive to forming a reliable sealing relationship between the first box body 20 and the second box body 30.
  • the second side wall 34 and the second end wall 33 are connected at an obtuse angle, so that the second sealing surface 32 and the first surface 31 do not intersect perpendicularly, which facilitates the filling of the sealant 40 or the setting of the sealing gasket in the space between the first sealing surface 21 and the second sealing surface 32, and is conducive to forming a reliable sealing relationship between the first box body 20 and the second box body 30.
  • the second end wall 33 and the second side wall 34 may be arranged vertically.
  • the second side wall 34 is located on the outer side of the first side wall 23, that is, the second side wall 34 is located on the side of the first side wall 23 that faces away from the enclosed space A. At least a portion of the surface of the first side wall 23 facing the second side wall 34 forms the first sealing surface 21.
  • the surface of the first side wall 23 facing the second side wall 34 is also the surface of the first side wall 23 that faces away from the enclosed space A. At least a portion of the surface of the second side wall 34 facing the first side wall 23 forms the second sealing surface 32.
  • the surface of the second side wall 34 facing the first side wall 23 is also the surface of the second side wall 34 facing the enclosed space A.
  • the first sealing surface 21 and the second sealing surface 32 together form a sealant containing space B for containing the sealant 40 .
  • the cross-section of the glue holding space B formed by the first sealing surface 21 and the second sealing surface 32 can be a triangular structure to form a larger opening at the end of the glue holding space B away from the second end wall 33 to facilitate the filling of the glue holding space B into the glue holding space B.
  • the adhesive space B may be filled with a sealant 40.
  • the sealant 40 may be a sealing material with a certain degree of adhesion, and may also play the role of preventing leakage, waterproofing, vibration prevention, and heat insulation in the adhesive space B.
  • the sealant 40 may be a silicone sealant 40, a polyurethane sealant 40, a polysulfide sealant 40, an acrylic sealant 40, an anaerobic sealant 40, a butyl sealant 40, a chloroprene sealant 40, a PVC sealant 40, an asphalt sealant 40, and the like.
  • the first sealing surface 21 and the second sealing surface 32 together form a glue holding space B for accommodating the sealant 40.
  • the sealant 40 bonds the first sealing surface 21 and the second sealing surface 32, so there is no need to arrange other connecting parts to connect the first box body 20 and the second box body 30, thereby reducing the steps of assembling the battery 100 and saving costs.
  • the space formed between the first sealing surface 21 and the second sealing surface 32 can also be used to accommodate sealing members such as sealing pads and sealing rings (not shown in the figure).
  • the sealing member is clamped between the first sealing surface 21 and the second sealing surface 32.
  • the sealing member and the first sealing surface 21 can be abutted or bonded, and the sealing member and the second sealing surface 32 can be abutted or bonded.
  • the projection of the adhesive holding space B when projected along the first direction X, at least partially overlaps with the projection of the battery cell 10 .
  • At least a portion of the adhesive space B can extend to the side of the battery cell 10 that is away from the first surface 31, and when projected along the first direction X, the projection of the portion of the adhesive space B extending to the side of the battery cell 10 that is away from the first surface 31 at least partially overlaps with the projection of the battery cell 10.
  • the adhesive storage space B may partially extend to the side of the battery cell 10 away from the first surface 31 , or the adhesive storage space B may be entirely located on the side of the battery cell 10 away from the first surface 31 .
  • the projection of the glue holding space B at least partially overlaps with the projection of the battery cell 10, so the glue holding space B can occupy as little space as possible in the direction parallel to the first surface 31, and make full use of the space in the direction perpendicular to the first surface 31.
  • the glue holding space B has a larger sealing area while occupying as little space as possible in the direction parallel to the first surface 31, so as to improve the sealing between the first sealing surface 21 and the second sealing surface 32, so that the battery 100 has higher reliability.
  • the battery 100 further includes a glue blocking structure 50 , and the glue blocking structure 50 is disposed at the junction of the closed space A and the glue containing space B.
  • the sealant blocking structure 50 is used to block the sealant 40 filled in the sealant containing space B, so as to reduce the risk of the sealant 40 in the sealant containing space B overflowing into the closed space A.
  • the glue blocking structure 50 is disposed at the junction of the closed space A and the glue containing space B. It can also be understood that the glue blocking structure 50 is disposed at the junction of the closed space A and the glue containing space B.
  • a glue blocking structure 50 is provided at the junction of the closed space A and the glue storage space B.
  • the glue blocking structure 50 can limit the sealant 40 disposed in the glue storage space B from overflowing into the closed space A, thereby reducing the waste of the sealant 40 and making the battery 100 have better sealing performance, which is beneficial to improving the safety of the battery 100. Sealing reliability.
  • the glue blocking structure 50 is disposed on the second side wall 34 .
  • the rubber blocking structure 50 disposed on the second side wall 34 can support the first box body 20 along the gravity direction and limit the first box body 20 from moving in the direction close to the second end wall 33 so that the first box body 20 and the second box body 30 form a closed space A of a certain size.
  • the glue blocking structure 50 can support the first box body 20 by supporting one end of the first side wall 23 away from the first end wall 22 .
  • the glue blocking structure 50 is a first protrusion 51 protruding from the inner surface of the second side wall 34 , and the first box body 20 is supported by the first protrusion 51 .
  • the inner surface of the second side wall 34 is the surface of the second side wall 34 facing the closed space A.
  • the glue blocking structure 50 is a first protrusion 51 disposed on the inner surface of the second side wall 34. The first protrusion 51 protrudes from the first inner surface along the second direction Y and extends into the closed space A.
  • the first protrusion 51 and the second side wall 34 can be integrally formed to facilitate the manufacturing of the second box body 30.
  • the first protrusion 51 and the second side wall 34 can be separately provided, and then the first protrusion 51 is connected to the second side wall 34.
  • the first protrusion 51 has a first abutting surface 511 located on the side away from the second end wall 33. One end of the first side wall 23 away from the first end wall 22 abuts against the first abutting surface 511.
  • the first inner surfaces of the two second side walls 34 are both provided with first protrusions 51, and one end of the two first side walls 23 of the first box body 20 away from the first end wall 22 abuts against the first abutting surfaces 511 of the two first protrusions 51, respectively.
  • the first abutting surfaces 511 of the two first protrusions 51 can be located in the same plane, so that the ends of the two first side walls 23 of the first box body 20 away from the first end wall 22 can be at the same height in the first direction X.
  • the first protrusion 51 can not only prevent the sealant 40 in the sealant space B from entering the closed space A, but also limit the first box body 20 from moving toward the second end wall 33 so that the closed space A maintains a certain size for accommodating the battery cell 10.
  • the glue blocking structure 50 is a first protrusion 51 protruding from the inner surface of the second side wall 34, which can not only prevent the sealant 40 in the glue containing space B from overflowing into the closed space A, but also support the first box body 20 and limit the movement of the first box body 20 toward the second box body 30, so that the closed space A can maintain a larger size.
  • the distance between the first abutting surface 511 and the end of the second side wall 34 away from the second end wall 33 is smaller than the distance between the first abutting surface 511 and the first surface 31, so that the first box body 20 can be closer to the end of the second side wall 34 away from the second end wall 33, so as to facilitate the assembly of the first box body 20 and the second box body 30.
  • the second side wall 34 of the second box body 30 has a higher dimension along the first direction X, and the second box body 30 can be a high box wall structure, which can also be called a high vertical wall structure.
  • the dimension of the first side wall 23 of the first box body 20 can be set smaller, so as to facilitate the assembly of the first box body 20 and the second box body 30.
  • the end of the first protrusion 51 facing the second end wall 33 can form a gap with the second end wall 33, thereby reducing the occupation of the enclosed space A by the first protrusion 51 and reducing the risk of interference between the first protrusion 51 and the internal structure of the enclosed space A.
  • the end of the first protrusion 51 facing the second end wall 33 can extend to the second end wall 33, and the second end wall 33 can support the first protrusion 51. Then, the first end wall 22 and the first protrusion 51 can jointly support the first box body 20, reducing the risk of the first protrusion 51 being detached from the second side wall 34 due to the weight of the first box body 20.
  • the glue blocking structure 50 is a groove 52 disposed on the inner surface of the second side wall 34 , and a portion of the first box body 20 is located in the groove 52 .
  • the glue blocking structure 50 may be a groove 52 disposed on the first inner surface. At least a portion of the first box body 20 is inserted into the groove 52 . The groove wall surface of the groove 52 supports the first box body 20 .
  • the first side wall 23 may be inserted into the groove 52 , and the groove wall surface of the groove 52 abuts against an end of the first side wall 23 away from the first end wall 22 .
  • the groove 52 can extend to the end surface of the second side wall 34 away from the second end wall 33, so that an L-shaped groove 52 can be formed on the second side wall 34, and the groove side wall and groove bottom surface of the groove 52 can abut against the end of the first side wall 23 away from the first end wall 22.
  • the surface of the groove 52 facing the second sealing surface can abut against the first side wall 23 and form the second sealing surface 32.
  • the groove side surface of the groove 52 can be the groove wall surface of the groove 52 parallel to the first direction X
  • the groove bottom surface of the groove 52 can be the groove wall surface of the groove 52 intersecting with the first direction X.
  • the first inner surfaces of the two second side walls 34 are both provided with grooves 52, and the ends of the two first side walls 23 of the first box body 20 away from the first end wall 22 are respectively in contact with the groove wall surfaces of the two grooves 52.
  • the groove bottom surfaces of the two grooves 52 can be located in the same plane, so that the ends of the two first side walls 23 of the first box body 20 away from the first end wall 22 can be at the same height in the first direction X.
  • the groove 52 can not only prevent the sealant 40 in the glue storage space B from entering the closed space A, but the bottom surface of the groove 52 can also limit the movement of the first box body 20 toward the second end wall 33, so that the closed space A maintains a certain size to accommodate the battery cell 10.
  • the glue blocking structure 50 is a groove 52 disposed on the inner surface of the second side wall 34, which can not only prevent the sealant 40 in the glue containing space B from overflowing into the sealing In the closed space A, the weight of the second box body 30 can also be reduced, and such a rubber blocking structure 50 will not interfere with the structure in the closed space A.
  • the distance between the bottom surface of the groove 52 and the end of the second side wall 34 away from the second end wall 33 is smaller than the distance between the bottom surface of the groove 52 and the first surface 31, so that the first box body 20 can be closer to the opening side of the second box body 30 to facilitate the assembly of the first box body 20 and the second box body 30.
  • the second side wall 34 of the second box body 30 has a higher dimension along the first direction X, the second box body 30 can be a high box wall structure, and the second box body 30 can also be called a high vertical wall box body, and the dimension of the first side wall 23 of the first box body 20 can be set to be smaller, which is convenient for the assembly of the first box body 20 and the second box body 30.
  • the adhesive blocking structure 50 is disposed on the second side wall 34 to reduce the risk of interference between the adhesive blocking structure 50 and the battery cell 10 .
  • the second side wall 34 is bent from the end of the second end wall 33 along the first direction X toward the side away from the battery cell 10 to form a recess C, and the first side wall 23 is inserted into the recess C; or, the first side wall 23 is bent from the end of the first end wall 22 along the first direction X toward the side away from the battery cell 10 to form a recess C, and the second side wall 34 is inserted into the recess C; the recess C is used to accommodate the sealant 40.
  • the second side wall 34 is bent from one end of the second end wall 33 to form a recess C with an opening along the first direction X toward the first end wall 22.
  • a portion of the inner side surface of the second side wall 34 forms the wall surface of the recess C, and a portion of the inner side surface of the second side wall 34 can form the second sealing surface 32.
  • the inner side surface of the second side wall 34 refers to the surface of the second side wall 34 facing the battery cell 10 in the second direction Y before bending.
  • the surface of the bottom wall of the recess C in the first direction X away from the enclosed space A can protrude from the surface of the second end wall 33 away from the enclosed space A.
  • the formation of the recess C by bending has little effect on the strength of the second box body 30.
  • the first side wall 23 is inserted into the recess C, and at least a portion of the surface of the first side wall 23 facing away from the closed space A in the second direction Y forms a first sealing surface 21.
  • the first sealing surface 21 and the second sealing surface 32 can fit together, and the sealant 40 is contained in the recess C and is located on the side of the first side wall 23 facing the closed space A.
  • the sealant 40 can connect the surface of the first side wall 23 facing the closed space A and the wall surface of the recess C opposite to the surface of the first side wall 23 facing the closed space A, so that the first sealing surface 21, the second sealing surface 32 and the sealant 40 can seal the closed space A together.
  • a space for accommodating the sealant 40 may also be formed between the first sealing surface 21 and the second sealing surface 32.
  • the sealant 40 may be accommodated in the recess C and completely located between the first sealing surface 21 and the second sealing surface 32.
  • the sealant 40 may also be accommodated in the recess C and partially located between the first sealing surface 21 and the second sealing surface 32.
  • the sealant 40 can connect the first sealing surface 21 and the second sealing surface 32, and the other part is located on the side of the first side wall 23 facing the closed space A.
  • the sealant 40 can connect the surface of the first side wall 23 facing the closed space A and the wall of the recess C opposite to the surface of the first side wall 23 facing the closed space A, which can not only improve the sealing performance but also improve the stability of the first side wall 23 in the recess C.
  • a space for accommodating the sealant 40 may also be formed between the first sealing surface 21 and the second sealing surface 32.
  • the sealant 40 is accommodated in the recess C and is entirely located between the first sealing surface 21 and the second sealing surface 32, the surface of the first side wall 23 facing the closed space A and the surface of the recess C and the surface of the first side wall 23 facing the closed space A may fit together or form a gap.
  • the two second side walls 34 can be bent to form a recessed portion C, and the recessed portions C of the two second side walls 34 are respectively located at two ends of the second end wall 33 along the second direction Y.
  • the two first side walls 23 can be respectively inserted into the recessed portions C formed by bending the two second side walls 34.
  • the first side wall 23 is bent from one end of the first end wall 22 to form a recess C with an opening along the first direction X toward the second end wall 33.
  • a portion of the inner side surface of the first side wall 23 forms the wall surface of the recess C, and a portion of the inner side surface of the first side wall 23 can form the first sealing surface 21.
  • the inner side surface of the first side wall 23 refers to the surface of the first side wall 23 facing the battery cell 10 in the second direction Y before bending.
  • the concave portion C is formed by bending, which has little influence on the strength of the first housing 20 .
  • the second side wall 34 is inserted into the recess C, and at least a portion of the surface of the second side wall 34 facing away from the closed space A in the second direction Y forms a second sealing surface 32.
  • the first sealing surface 21 and the second sealing surface 32 can be fitted, and the sealant 40 is contained in the recess C and is located on the side of the second side wall 34 facing the closed space A.
  • the sealant 40 can connect the surface of the second side wall 34 facing the closed space A and the wall surface of the recess C opposite to the surface of the second side wall 34 facing the closed space A, so that the first sealing surface 21, the second sealing surface 32 and the sealant 40 can seal the closed space A together.
  • a space for accommodating the sealant 40 may also be formed between the first sealing surface 21 and the second sealing surface 32.
  • the sealant 40 may be accommodated in the recess C and completely located between the first sealing surface 21 and the second sealing surface 32.
  • the sealant 40 may also be accommodated in the recess C and partially located between the first sealing surface 21 and the second sealing surface 32.
  • the sealant 40 can connect the first sealing surface 21 and the second sealing surface 32, and the other part is located on the side of the second side wall 34 facing the closed space A.
  • the sealant 40 can connect the surface of the second side wall 34 facing the closed space A and the wall of the recess C opposite to the surface of the second side wall 34 facing the closed space A, which can not only improve the sealing performance but also improve the stability of the first side wall 23 in the recess C.
  • a space for accommodating the sealant 40 may also be formed between the first sealing surface 21 and the second sealing surface 32.
  • the surface of the second side wall 34 facing the closed space A and the surface of the recess C and the surface of the second side wall 34 facing the closed space A may fit together or form a gap.
  • the two first side walls 23 can be bent to form a recess C, and the recesses C of the two first side walls 23 are respectively located at two ends of the first end wall 22 along the second direction Y.
  • the two second side walls 34 can be respectively inserted into the recesses C formed by bending the two first side walls 23 .
  • the second side wall 34 is bent from the end of the second end wall 33 along the first direction X toward the side away from the battery cell 10 to form a concave portion.
  • a recess is formed on the basis of the strength of the second side wall 34 , and the first side wall 23 is inserted into the recess, which can limit the first side wall 23 and improve the stability of the cooperation between the first box body 20 and the second box body 30 .
  • the projection of the recess C when projected along the first direction X, the projection of the recess C at least partially overlaps with the projection of the battery cell 10 .
  • the battery cell 10 extends to the opening of the recess C.
  • the battery cell 10 extends along the second direction Y to the opening of the recess C, and a portion of the projection of the battery cell 10 in the first direction X is located in the recess C.
  • the projection of the recess C When projected along the first direction X, the projection of the recess C at least partially overlaps with the projection of the battery cell 10, so the battery cell 10 can fully utilize the enclosed space A to increase the energy density of the battery cell 10.
  • the battery cell 10 can also prevent the sealant 40 in the recess C from overflowing into the enclosed space A.
  • the first sealing surface 21 and the second sealing surface 32 are both perpendicular to the first surface 31 .
  • the first sealing surface 21 and the second sealing surface 32 are arranged opposite to and in parallel in a direction parallel to the first surface 31 .
  • the first sealing surface 21 and the second sealing surface 32 are both perpendicular to the first surface 31.
  • the first sealing surface 21 and the second sealing surface 32 are both perpendicular to the first surface 31, which can make the first sealing surface 21 and the second sealing surface 32 occupy the least space in the direction parallel to the first surface 31 and intersecting with the first sealing surface 21 and the second sealing surface 32, so that the first sealing surface 21 and the second sealing surface 32 fully utilize the space in the direction perpendicular to the first surface 31, thereby improving the space utilization of the battery 100 in the direction parallel to the first surface 31 and intersecting with the first sealing surface 21 and the second sealing surface, so as to accommodate more battery cells 10 or reduce the volume of the battery 100, thereby improving the volume energy density of the battery 100.
  • the first box body 20 includes a first end wall 22 and a first side wall 23 connected to each other, and the first sealing surface 21 is arranged on the first side wall 23;
  • the second box body 30 includes a second end wall 33 and a second side wall 34 connected to each other, the second end wall 33 has a first surface 31 and is arranged opposite to the first end wall 22 along a first direction X, the first direction X is perpendicular to the first surface 31, and the second sealing surface 32 is arranged on the second side wall 34.
  • the first side wall 23 is connected to an end of the first end wall 22 along the second direction Y.
  • the first side wall 23 extends from the first end wall 22 along the first direction X toward the second box body 30 .
  • the second direction Y is a direction parallel to the first surface 31, and the first direction X is perpendicular to the second direction Y.
  • the second direction Y may be the width direction of the battery 100, and the first sealing surface 21 and the second sealing surface 32 are both perpendicular to the first surface 31, then the first sealing surface 21 and the second sealing surface 32 are both perpendicular to the second direction Y, or the first sealing surface 21 and the second sealing surface 32 are both perpendicular to the width direction of the battery 100.
  • the first sealing surface 21 and the second sealing surface 32 are both perpendicular to the first surface 31, which can reduce the space occupied by the first sealing surface 21 and the second sealing surface 32 in the second direction Y, thereby improving the space utilization of the battery 100 in the second direction Y, so as to accommodate more battery cells 10 or reduce the volume of the battery 100, thereby improving the volume energy density of the battery 100.
  • the battery 100 has a smaller size in the width direction, which can also help reduce the size of the electrical equipment powered by the battery 100 in the width direction of the battery 100.
  • the heavy truck is powered by the battery 100 provided in the embodiment of the present application, and the size of the heavy truck in the width direction of the battery 100 can be made smaller.
  • the width direction of the battery 100 is substantially the same as the width direction of the heavy truck, that is, the size of the heavy truck in its width direction can be smaller.
  • the first end wall 22 and the first side wall 23 are arranged vertically so that the first sealing surface 21 is perpendicular to the first surface 31.
  • the second end wall 33 and the second side wall 34 are arranged vertically so that the second sealing surface 32 is perpendicular to the first surface 31.
  • the first side wall 23 and the second side wall 34 are arranged oppositely and parallel to each other along the second direction Y.
  • At least a portion of the surface of the first side wall 23 facing or away from the closed space A along the second direction Y forms a first sealing surface 21.
  • At least a portion of the surface of the second side wall 34 facing or away from the closed space A along the second direction Y forms a second sealing surface 32.
  • the first box body 20 may include two first side walls 23, the two first side walls 23 are respectively connected to the two ends of the first end wall 22 along the second direction Y, and the two first side walls 23 are perpendicular to the first end wall 22.
  • the second box body 30 may include two second side walls 34, the two second side walls 34 are respectively connected to the two ends of the second end wall 33 along the second direction Y, and the two second side walls 34 are perpendicular to the second end wall 33.
  • the second side wall 34 is located on the side of the first side wall 23 away from the enclosed space A, at least a portion of the surface of the first side wall 23 away from the enclosed space A forms a first sealing surface 21, and at least a portion of the surface of the second side wall 34 close to the enclosed space A forms a second sealing surface 32.
  • the first box body 20 includes a first end wall 22 and a first side wall 23 connected to each other, and the second box body 30 includes a second end wall 33 and a second side wall 34 connected to each other.
  • the first box body 20 and the second box body 30 can conveniently enclose a closed space A for accommodating the battery cell 10.
  • the first sealing surface 21 is arranged on the first side wall 23, and the second sealing surface 32 is arranged on the second side wall 34.
  • the area of the first sealing surface 21 and the second sealing surface 32 can be larger, so as to form a good connection relationship and good sealing between the second sealing surface 32, so that the battery 100 has higher reliability, and the structure of the first box body 20 and the second box body 30 is simple and easy to manufacture.
  • a sealant 40 is filled between the first sealing surface 21 and the second sealing surface 32 .
  • the first sealing surface 21 and the second sealing surface 32 are arranged in a relative spacing in the second direction Y, and a Glue-containing space B.
  • the glue-containing space B between the first sealing surface 21 and the second sealing surface 32 may be an equidistant space; the glue-containing space B between the first sealing surface 21 and the second sealing surface 32 may also be a variable-spacing space where the spacing gradually increases or decreases along the third direction Z.
  • the sealant 40 is filled between the first sealing surface 21 and the second sealing surface 32, which can not only improve the sealing performance of the closed space A, but also can bond the first sealing surface 21 and the second sealing surface 32 through the sealant 40, thereby improving the connection stability of the first box body 20 and the second box body 30.
  • the sealant 40 bonds the first sealing surface 21 and the second sealing surface 32, so there is no need to set other connecting parts to connect the first box body 20 and the second box body 30, thereby reducing the steps of assembling the battery 100 and saving costs.
  • first sealing surface 21 and the second sealing surface 32 are both perpendicular to the first surface 31, the space formed between the first sealing surface 21 and the second sealing surface 32 can also be used to accommodate sealing components such as sealing pads and sealing rings.
  • the sealing component is clamped between the first sealing surface 21 and the second sealing surface 32.
  • the sealing component and the first sealing surface 21 can be abutted or bonded, and the sealing component and the second sealing surface 32 can be abutted or bonded.
  • the projection of the sealant 40 when projected along the second direction Y, the projection of the sealant 40 at least partially overlaps with the projection of the battery cell 10 .
  • the second direction Y is parallel to the first surface 31 and intersects the first side wall 23 .
  • At least a portion of the sealant 40 between the first sealing surface 21 and the second sealing surface 32 can extend to one side of the battery cell 10 along the second direction Y, and projected along the second direction Y, the projection of the portion of the sealant 40 extending to one side of the battery cell 10 in the second direction Y at least partially overlaps with the projection of the battery cell 10.
  • a portion of the sealant 40 may extend to one side of the battery cell 10 in the second direction Y, or the sealant 40 may be entirely located on one side of the battery cell 10 in the second direction Y.
  • the projection of the sealant 40 When projected along the second direction Y, the projection of the sealant 40 at least partially overlaps with the projection of the battery cell 10, which can reduce the space occupied by the sealant 40 in other directions intersecting the second direction Y.
  • the sealant 40 can make full use of the space of the battery 100 in the second direction Y, thereby facilitating the improvement of the energy density of the battery 100.
  • Other directions intersecting the second direction Y can be any directions intersecting the second direction Y, such as a first direction X perpendicular to the second direction Y, and a third direction Z perpendicular to both the first direction X and the second direction Y.
  • the battery 100 further includes a glue blocking structure 50 , which is disposed in the closed space A near the first sealing surface 21 and the second sealing surface 32 .
  • the sealant blocking structure 50 is used to block the sealant 40 filled in the sealant containing space B defined by the first sealing surface 21 and the second sealing surface 32 , so as to reduce the risk of the sealant 40 in the sealant containing space B overflowing into the closed space A.
  • the glue blocking structure 50 is arranged in the closed space A near the first sealing surface 21 and the second sealing surface 32. It can be understood that the glue blocking structure 50 is arranged at the junction of the closed space A and the glue containing space B, or it can be understood that the glue blocking structure 50 is arranged at the junction of the closed space A and the glue containing space B.
  • a glue blocking structure 50 is provided in the closed space A near the first sealing surface 21 and the second sealing surface 32.
  • the glue blocking structure 50 can limit the sealant 40 provided in the glue containing space B from overflowing into the closed space A, thereby reducing the waste of the sealant 40 and enabling the battery 100 to have better sealing performance, which is beneficial to improving the sealing reliability of the battery 100.
  • the adhesive blocking structure 50 may be disposed on the first surface 31 .
  • the adhesive blocking structure 50 is disposed on the first surface 31 , which facilitates the arrangement of the adhesive blocking structure 50 .
  • the glue blocking structure 50 disposed on the first surface 31 can have various forms. As shown in FIGS. 16 and 17 , the glue blocking structure 50 is a second protrusion 53 protruding from the first surface 31 , and part of the first box body 20 is located between the second side wall 34 and the second protrusion 53 .
  • the glue blocking structure 50 may be a second protrusion 53 protruding from the first surface 31 . Along the first direction X, at least a portion of the first box body 20 is located between the second side wall 34 and the second protrusion 53 .
  • first box body 20 includes the first end wall 22 and the first side wall 23
  • the end of the first side wall 23 away from the first end wall 22 is located between the second side wall 34 and the second protrusion 53.
  • the second protrusion 53 is located on the side of the first side wall 23 away from the second side wall 34.
  • the first protrusion 51 can not only limit the sealant 40 between the first sealing surface 21 and the second sealing surface 32 from overflowing into the closed space A, but also limit the first side wall 23 from deforming in the direction away from the first side wall 23, so that the closed space A keeps the initially set size basically unchanged, reducing the risk of the first side wall 23 deforming in the direction away from the second side wall 34 and squeezing the battery cell 10, and also reducing the risk of the sealant 40 between the first sealing surface 21 and the second sealing surface 32 failing to seal due to the gradual increase of the glue space B between the first sealing surface 21 and the second sealing surface 32 caused by the deformation of the first side wall 23 in the direction away from the second side wall 34.
  • first box body 20 includes two first side walls 23 and the second box body 30 includes two second box bodies 30
  • two first protrusions 51 can be set on the first surface 31, and the two first protrusions 51 are respectively set close to the two second side walls 34, and the two first side walls 23 are respectively inserted between the two first protrusions 51 and the two first side walls 23.
  • the first box body 20 includes a first end wall 22 and a first side wall 23 connected to each other, the first sealing surface 21 is arranged on the first side wall 23, the second box body 30 includes a second end wall 33, the second end wall 33 is provided with a receiving groove 54, the second sealing surface 32 is arranged on the groove wall of the receiving groove 54, the first side wall 23 is inserted into the receiving groove 54, and the receiving groove 54 is filled with sealant 40.
  • the first surface 31 of the second end wall 33 is formed with a receiving groove 54.
  • the receiving groove 54 can be recessed from the first surface 31 in a direction away from the first end wall 22.
  • the receiving groove 54 extends to the second side wall 34. At least a portion of the surface of the second side wall 34 facing the closed space A serves as both the second sealing surface 32 and the second sealing surface 32.
  • a groove wall surface of the accommodating groove 54 , a groove wall surface of the accommodating groove 54 arranged opposite to the second side wall 34 forms a glue blocking structure 50 , and the accommodating groove 54 can also be regarded as a glue blocking space.
  • Part of the first box body 20 is inserted into the receiving groove 54.
  • the first box body 20 includes the first end wall 22 and the first side wall 23, one end of the first side wall 23 away from the first end wall 22 is inserted into the receiving groove 54.
  • the sealant 40 between the first sealing surface 21 and the second sealing surface 32 is at least partially located in the receiving groove 54.
  • the thickness of the second end wall 33 at the position corresponding to the receiving groove 54 is less than the thickness of the second end wall 33 at other positions.
  • Such receiving groove 54 can be formed by thinning a part of the second end wall 33, or by integral molding such as casting or injection molding.
  • the receiving groove 54 is recessed from the first surface 31 in a direction away from the first end wall 22, and the surface of the second end wall 33 away from the first surface 31 is convex in a direction away from the first end wall 22 at a position corresponding to the receiving groove 54, so that the thickness of the second end wall 33 at the position corresponding to the receiving groove 54 can be consistent with the thickness of other positions of the second end wall 33, so that the second end wall 33 has a good structural strength.
  • a receiving groove 54 can be formed by stamping, bending, etc.
  • the first side wall 23 is inserted into the receiving groove 54, which can not only limit the first side wall 23, but also limit the deformation of the first side wall 23 toward the closed space A or away from the closed space A.
  • the receiving groove 54 is filled with sealant 40, which can not only improve the sealing performance, but the sealant 40 can also connect the first box body 20 and the second box body 30 in the receiving groove 54. Therefore, there is no need to set other connecting parts to connect the first box body 20 and the second box body 30, thereby reducing the steps of assembling the battery 100 and saving costs.
  • the second side wall 34 of the second box body 30 can be set as a low side wall structure, that is, the second side wall 34 of the second box body 30 is smaller in size in the first direction X, which can reduce the space occupied by the second side wall 34 in the first direction X.
  • the projection of the receiving groove 54 when projected along the first direction X, the projection of the receiving groove 54 at least partially overlaps with the projection of the battery cell 10 .
  • At least a portion of the battery cell 10 extends to the notch of the receiving groove 54 along the second direction Y.
  • the battery cell 10 extends to the notch of the receiving groove 54 along the second direction Y, and a portion of the projection of the battery cell 10 in the first direction X is located in the receiving groove 54.
  • the projection of the receiving groove 54 When projected along the first direction X, the projection of the receiving groove 54 at least partially overlaps with the projection of the battery cell 10, so the battery cell 10 can fully utilize the enclosed space A to increase the energy density of the battery cell 10.
  • the battery cell 10 can also prevent the sealant 40 in the receiving groove 54 from overflowing into the enclosed space A.
  • the first box body 20 also includes two third side walls 24, and the two third side walls 24 are respectively connected to the two ends of the first end wall 22 along the third direction Z.
  • the two first side walls 23 and the two third side walls 24 together form the box side walls of the first box body 20, so that the first box body 20 is a hollow structure with an opening on one side to form a accommodating cavity for accommodating the battery cell 10.
  • the second box body 30 also includes two fourth side walls 35, and the two fourth side walls 35 are respectively connected to the two ends of the second end wall 33 along the third direction Z.
  • the two fourth side walls 35 and the two second side walls 34 together form the box side walls of the second box body 30, so that the second box body 30 is a hollow structure with an opening on one side to form a accommodating cavity for accommodating the battery cell 10.
  • the third direction Z, the second direction Y and the first direction X are perpendicular to each other.
  • the third direction Z may be the length direction of the battery 100 .
  • the third direction Z may be substantially consistent with the length direction of the heavy truck.
  • the third side wall 24 and the second side wall 34 are disposed in a one-to-one correspondence, and the third side wall 24 is located on the inner side of the fourth side wall 35 .
  • the third side wall 24 is provided with a third sealing surface (not shown in the figure), and the fourth side wall 35 is provided with a fourth sealing surface (not shown in the figure).
  • the third sealing surface and the fourth sealing surface cooperate to seal the closed space A.
  • the third sealing surface can intersect with the first surface 31, and the fourth sealing surface can intersect with the first surface 31, so as to reduce the occupation of the third sealing surface and the fourth sealing surface in the third direction Z space.
  • a sealed space for accommodating the sealant 40 can also be formed between the third sealing surface and the fourth sealing surface.
  • the sealant 40 can adhere to the third sealing surface and the fourth sealing surface, so as to realize the connection between the first box body 20 and the second box body 30. It is not necessary to set other connectors at the corresponding positions of the third sealing surface and the fourth sealing surface to connect the first box body 20 and the second box body 30, which is conducive to simplifying the assembly steps of the battery 100 and saving costs.
  • the third sealing surface and the fourth sealing surface may also be parallel to the first surface 31 .
  • the first box body 20 may be a plate-like structure, and the second box body 30 may be a hollow structure with one side open to form a receiving cavity for receiving the battery cell 10.
  • the first box body 20 forms first sealing surfaces 21 with two end surfaces opposite to the two second side walls 34 along the second direction Y.
  • a glue-containing space B for setting the sealant 40 may be formed between the first sealing surface 21 and the second sealing surface 32.
  • the surface of the first box body 20 facing away from the first surface 31 and the end surface of the second side wall 34 facing away from the second end wall 33 may be coplanar.
  • the second box body 30 may be a plate-like structure, and the first box body 20 may be a hollow structure with one side open to form a housing cavity for accommodating the battery cell 10.
  • the second box body 30 forms second sealing surfaces 32 with two end surfaces opposite to the two first side walls 23 along the second direction Y.
  • a sealant space B for setting the sealant 40 may be formed between the first sealing surface 21 and the second sealing surface 32.
  • the surface of the second box body 30 facing away from the first surface 31 may be coplanar with the end surface of the first side wall 23 facing away from the first end wall 22.
  • An embodiment of the present application further provides an electrical device, and the electrical device includes the battery 100 provided in any of the above embodiments.
  • the electrical device uses the battery 100 with a higher energy density provided above, so it has a longer battery life and can meet more power demands.
  • the embodiment of the present application provides a battery 100, which includes a battery cell 10, a first box body 20 and a second box body 30.
  • the battery cell 10 is contained in a closed space A defined by the first box body 20 and the second box body 30.
  • the first box body 20 includes a first end wall 22 and a first side wall 23, both ends of the first end wall 22 along the second direction Y are connected to the first side wall 23, the two first side walls 23 are arranged at an obtuse angle to the first end wall 22, and the two first side walls 23 are arranged in an eight-shaped shape.
  • the second box body 30 includes a second end wall 33 and a second side wall 34, the second end wall 33 and the first end wall 22 are arranged opposite to each other along the first direction X, the second end wall 33 is connected to the second side wall 34 at both ends along the second direction Y, and the two second side walls 34 are arranged perpendicular to the second end wall 33.
  • the size of the two second side walls 34 along the first direction X is greater than the size of the first side wall 23 along the first direction X, and the second box body 30 is a high side wall structure.
  • the first side wall 23 is located on the side of the second side wall 34 close to the closed space A.
  • a portion of the surface of the first side wall 23 away from the closed space A forms a first sealing surface 21, and a portion of the surface of the second side wall 34 close to the closed space A forms a second sealing surface 32.
  • a storage space containing the sealant 40 is formed between the first sealing surface 21 and the second sealing surface 32.
  • the surface of the second end wall 33 facing the closed space A is the first surface 31, and the first surface 31 carries the battery cell 10.
  • the first inner surfaces of the two second side walls 34 are both convexly provided with a first protrusion 51, and the ends of the two first side walls 23 of the first box body 20 away from the first end wall 22 are respectively supported on the first abutment surfaces 511 of the two first protrusions 51 away from the second end wall 33.
  • first inner surfaces of the two second side walls 34 are both provided with a groove 52, and the groove 52 extends to the end of the second side wall 34 away from the second end wall 33.
  • the ends of the two first side walls 23 of the first box body 20 away from the first end wall 22 are respectively inserted into the two grooves 52 and abut against the groove wall surface of the groove 52.
  • the embodiment of the present application provides a battery 100, which includes a battery cell 10, a first box body 20 and a second box body 30.
  • the battery cell 10 is accommodated in a closed space A defined by the first box body 20 and the second box body 30.
  • the first box body 20 includes a first end wall 22 and a first side wall 23, and both ends of the first end wall 22 along the second direction Y are connected to the first side wall 23, and the two first side walls 23 are arranged perpendicular to the first end wall 22.
  • the second box body 30 includes a second end wall 33 and a second side wall 34, and the second end wall 33 and the first end wall 22 are arranged opposite to each other along the first direction X, and both ends of the second end wall 33 along the second direction Y are connected to the second side wall 34, and the two second side walls 34 are arranged perpendicular to the second end wall 33.
  • the size of the two second side walls 34 along the first direction X is smaller than the size of the first side wall 23 along the first direction X, and the second box body 30 is a low side wall structure.
  • the first side wall 23 is located on the side of the second side wall 34 close to the closed space A.
  • a portion of the surface of the first side wall 23 away from the closed space A forms a first sealing surface 21, and a portion of the surface of the second side wall 34 close to the closed space A forms a second sealing surface 32.
  • a storage space containing the sealant 40 is formed between the first sealing surface 21 and the second sealing surface 32.
  • the surface of the second end wall 33 facing the closed space A is the first surface 31, and the first surface 31 carries the battery cell 10.
  • Two second protrusions 53 are convexly provided on the first surface 31, and the two second protrusions 53 are arranged at intervals along the second direction Y, and the second protrusions 53 are the sealant blocking structure 50.
  • the ends of the two first side walls 23 of the first box body 20 away from the first end wall 22 are respectively inserted between the two second protrusions 53 and the two second side walls 34.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请提供了一种电池及用电设备,电池包括电池单体、第一箱体和第二箱体;第一箱体包括第一密封面;第二箱体包括第一表面和第二密封面,第一表面用于承载电池单体;第一箱体与第二箱体共同围合形成容纳电池单体的封闭空间,第一密封面与第二密封面配合以用于密封封闭空间;第一密封面与所述第一表面相交,第二密封面与所述第一表面相交,能够减少第一密封面和第二密封面在平行第一表面且与第一密封面和第二密封相交的方向上的空间占用,从而提高了电池在该平行第一表面且与第一密封面和第二密封均相交的方向上的空间利用率,以容纳更多的电池单体或者减小电池的体积,进而提高电池的体积能量密度。

Description

电池及用电设备
相关申请的交叉引用
本申请要求享有于2023年08月15日提交的名称为“电池及用电设备”的中国专利申请202311027215.8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
本申请本申请涉及电池技术领域,具体而言,涉及一种电池及用电设备。
背景技术
电池广泛应用于电子设备、交通工具、电动工具、无人机、储能设备等领域。随着应用环境及条件越来越复杂,对电池的能量密度提出了更高的要求。
发明内容
本申请实施例提供一种电池及用电设备,以提高电池的能量密度。
第一方面,本申请实施例提供一种电池,所述电池包括电池单体、第一箱体和第二箱体;所述第一箱体包括第一密封面;所述第二箱体包括第一表面和第二密封面,所述第一表面用于承载所述电池单体;所述第一箱体与所述第二箱体共同围合形成容纳所述电池单体的封闭空间,所述第一密封面与所述第二密封面配合以用于密封所述封闭空间;所述第一密封面与所述第一表面相交,所述第二密封面与所述第一表面相交。
上述技术方案中,第一密封面和第二密封均与第一表面相交,也即第一密封面与第一表面不平行,第二密封面与第一表面不平行,在同样的密封宽度情况下,相对于第一密封面和第二密封面平行第一表面的情况,第一密封面和第二密封面均与第一表面相交能够减少第一密封面和第二密封面在平行第一表面且与第一密封面和第二密封相交的方向上的空间占用,从而提高了电池在该平行第一表面且与第一密封面和第二密封均相交的方向上的空间利用率,以容纳更多的电池单体或者减小电池的体积,进而提高电池的体积能量密度。
在本申请第一方面的一些实施例中,所述第一密封面和所述第二密封面中的至少一者与所述第一表面垂直。
上述技术方案中,第一密封面和第二密封面中的至少一者与第一表面垂直,能够减少第一密封面和第二密封面中与第一表面垂直的一者在平行第一表面且与第一密封面和第二密封面相交的方向上的空间占用,使得第一密封面和第二密封面中与第一表面垂直的一者充分利用了垂直第一表面的方向上的空间,有利于提高电池的体积能量密度。
在本申请第一方面的一些实施例中,所述第一密封面和所述第二密封面中的一者与所述第一表面垂直,所述第一密封面和所述第二密封面中的另一者与所述第一表面非垂直且相交。
上述技术方案中,第一密封面和第二密封面中的一者与第一表面垂直,另一者与第一表面非垂直且相交,不仅能够减少第一密封面和第二密封面在平行第一表面且与第一密封面和第二密封面相交的方向上的空间占用,从而提高了电池在该平行第一表面且与第一密封面和第二密封均相交的方向上的空间利用率,以容纳更多的电池单体或者减小电池的体积,进而提高电池的体积能量密度,还能充分利用垂直第一表面的方向上的空间,进一步提高电池的体积能量密度。
在本申请第一方面的一些实施例中,所述第一密封面和所述第二密封面中与所述第一表面相互垂直的一者位于另一者远离所述封闭空间的一侧。
上述技术方案中,第一密封面和第二密封面中与第一表面相互垂直的一者位于另一者远离封闭空间的一侧,则第一密封面和第二密封面中与第一表面非垂直相交的一者靠近封闭空间设置,能够充分利用第一箱体和第二箱体形成的箱体的内部空间,减小电池的外部尺寸,有利于提高电池的体积能量密度。
在本申请第一方面的一些实施例中,所述第二密封面垂直所述第一表面,所述第二密封面位于所述第一密封面远离所述封闭空间的一侧。
上述技术方案中,第二密封面垂直第一表面,第二密封面位于第一密封面远离封闭空间的一侧,不仅使得第二密封面能够利用垂直第一表面的方向上的空间,还方便第一箱体和第二箱体组装。
在本申请第一方面的一些实施例中,所述第一箱体包括相互连接的第一端壁和第一侧壁,所述第一密封面设置于所述第一侧壁;所述第二箱体包括相互连接的第二端壁和第二侧壁,所述第二端壁具有所述第一表面且与所述第一端壁沿第一方向相对设置,所述第一方向垂直于所述第一表面,所述第二密封面设置于所述第二侧壁。
上述技术方案中,第一箱体包括相互连接的第一端壁和第一侧壁,第二箱体包括相互连接的第二端壁和第二侧壁,一方面方便能够使得第一箱体和第二箱体围合成用于容纳电池单体的封闭空间,另一方面,第一密封面设置于第一侧壁,第二密封面设置于第二侧壁,能够使得第一密封面和第二密封面的面积较大,以与第二密封面之间形成良好的连接关系以及良好的密封性,使得电池具有较高的可靠性,还使得第一箱体和第二箱体的结构简单, 便于制造。
在本申请第一方面的一些实施例中,所述第一密封面与所述第一表面非垂直且相交,所述第一侧壁和所述第一端壁呈钝角连接;或者,所述第二密封面与所述第一表面非垂直且相交,所述第二侧壁和所述第二端壁呈钝角连接。
上述技术方案中,第一侧壁和第一端壁呈钝角连接,使得第一密封面和第一表面非垂直相交,方便第一密封面和第二密封面之间的空间填充密封胶或设置密封垫,有利于第一箱体和第二箱体之间形成可靠的密封关系。第二侧壁和第二端壁呈钝角连接,使得第二密封面和第一表面非垂直相交,方便第一密封面和第二密封面之间的空间填充密封胶或设置密封垫,有利于第一箱体和第二箱体之间形成可靠的密封关系。
在本申请第一方面的一些实施例中,所述第一密封面和所述第二密封面共同形成用于容纳密封胶的容胶空间。
上述技术方案中,第一密封面和第二密封面共同形成用于容纳密封胶的容胶空间,可以通过在容胶空间内设置密封胶,不仅能够提高对封闭空间的密封性能,还能通过密封胶粘接第一密封面和第二密封面,提高第一箱体和第二箱体连接稳定性,密封胶粘接第一密封面和第二密封面,则可以不需要设置其他连接件连接第一箱体和第二箱体,减少电池组装的步骤和节约成本。
在本申请第一方面的一些实施例中,沿所述第一方向投影,所述容胶空间的投影与所述电池单体的投影至少部分重合。
上述技术方案中,沿第一方向投影,容胶空间的投影与电池单体的投影至少部分重合,则容胶空间可以尽可能地少占用平行第一表面的方向上的空间,充分利用了垂直第一表面的方向上的空间,容胶空间在尽可能地少占用平行第一表面的方向上的空间的条件下,具有较大的密封面积,以提高第一密封面和第二密封面之间的密封性,使得电池具有较高的可靠性。
在本申请第一方面的一些实施例中,所述电池还包括挡胶结构,所述挡胶结构设置于所述封闭空间与所述容胶空间的相接处。
上述技术方案中,封闭空间与容胶空间的相接处设置有挡胶结构,挡胶结构可以限制设置在容胶空间内的密封胶溢流至封闭空间内或者溢流至封闭空间外,减少密封胶浪费,还能使电池具有较好的密封性能,有利于提高电池的密封可靠性。
在本申请第一方面的一些实施例中,所述挡胶结构设置于所述第二侧壁。
上述技术方案中,挡胶结构设置于第二侧壁,降低挡胶结构和电池单体的干涉的风险。
在本申请第一方面的一些实施例中,所述挡胶结构为凸设于所述第二侧壁的内表面的第一凸起,所述第一箱体支撑于所述第一凸起。
上述技术方案中,挡胶结构为凸设于第二侧壁的内表面的第一凸起,不仅能够阻挡容胶空间内的密封胶溢进封闭空间内,还能支撑第一箱体,限制第一箱体向靠近第二箱体的方向移动,以使封闭空间保持较大的尺寸。
在本申请第一方面的一些实施例中,所述挡胶结构为设置于所述第二侧壁的内表面的凹槽,所述第一箱体的部分位于所述凹槽内。
上述技术方案中,挡胶结构为设置于第二侧壁的内表面的凹槽,不仅能够阻挡容胶空间内的密封胶溢进封闭空间内,还能减轻第二箱体的重量,这样的挡胶结构也不会与封闭空间内的结构干涉。
在本申请第一方面的一些实施例中,所述第二侧壁自所述第二端壁的端部沿所述第一方向朝远离所述电池单体的一侧弯折形成凹部,所述第一侧壁插入所述凹部中;或者,所述第一侧壁自所述第一端壁的端部沿所述第一方向朝远离所述电池单体的一侧弯折形成凹部,所述第二侧壁插入所述凹部中;所述凹部用于容纳密封胶。
上述技术方案中,第二侧壁自第二端壁的端部沿第一方向朝远离电池单体的一侧弯折形成凹部,可以在不降低第二侧壁的强度的基础上形成凹部,第一侧壁插入凹部中,能够对第一侧壁起到限位作用,提高第一箱体和第二箱体配合的稳定性。
在本申请第一方面的一些实施例中,沿所述第一方向投影,所述凹部的投影与所述电池单体的投影至少部分重合。
上述技术方案中,沿第一方向投影,凹部的投影与电池单体的投影至少部分重合,则电池单体可以充分利用封闭空间,以使提高电池单体的能量密度。电池单体还能够起到阻挡凹部内的密封胶溢进封闭空间的作用。
在本申请第一方面的一些实施例中,所述第一密封面和所述第二密封面均与所述第一表面垂直。
上述技术方案中,第一密封面和第二密封面均与第一表面垂直,相对于第一密封面和第二密封面平行第一表面的情况,第一密封面和第二密封均与第一表面垂直能够使得第一密封面和第二密封面在平行第一表面且与第 一密封面和第二密封面相交的方向上占用的空间最少,使得第一密封面和第二密封面充分利用了垂直第一表面的方向上的空间,从而提高了电池在该平行第一表面且与第一密封面和第二密封均相交的方向上的空间利用率,以容纳更多的电池单体或者减小电池的体积,进而提高电池的体积能量密度。
在本申请第一方面的一些实施例中,所述第一箱体包括相互连接的第一端壁和第一侧壁,所述第一密封面设置于所述第一侧壁;所述第二箱体包括相互连接的第二端壁和第二侧壁,所述第二端壁具有所述第一表面且与所述第一端壁沿第一方向相对设置,所述第一方向垂直于所述第一表面,所述第二密封面设置于所述第二侧壁。
上述技术方案中,第一箱体包括相互连接的第一端壁和第一侧壁,第二箱体包括相互连接的第二端壁和第二侧壁,一方面方便能够使得第一箱体和第二箱体围合成用于容纳电池单体的封闭空间,另一方面,第一密封面设置于第一侧壁,第二密封面设置于第二侧壁,能够使得第一密封面和第二密封面的面积较大,以与第二密封面之间形成良好的连接关系以及良好的密封性,使得电池具有较高的可靠性,还使得第一箱体和第二箱体的结构简单,便于制造。
在本申请第一方面的一些实施例中,所述第一密封面和所述第二密封面之间填充有密封胶。
上述技术方案中,第一密封面和第二密封面之间填充有密封胶,不仅能够提高对封闭空间的密封性能,还能通过密封胶粘接第一密封面和第二密封面,提高第一箱体和第二箱体连接稳定性,密封胶粘接第一密封面和第二密封面则可以不需要设置其他连接件连接第一箱体和第二箱体,减少电池组装的步骤和节约成本。
在本申请第一方面的一些实施例中,沿第二方向投影,所述密封胶的投影与所述电池单体的投影至少部分重合,所述第二方向平行于所述第一表面且与所述第一侧壁相交。
上述技术方案中,沿第二方向投影,密封胶的投影与电池单体的投影至少部分重合,能够减少密封胶占用与第二方向相交的其他方向上的空间,密封胶能够充分利用电池在第二方向上的空间,从而有利于提高电池的能量密度。
在本申请第一方面的一些实施例中,所述电池还包括挡胶结构,所述挡胶结构设置于所述封闭空间靠近所述第一密封面和所述第二密封面的位置。
上述技术方案中,在封闭空间靠近第一密封面和第二密封面的位置设置挡胶结构,挡胶结构可以限制设置在容胶空间内的密封胶溢流至封闭空间内,减少密封胶浪费,还能使电池具有较好的密封性能,有利于提高电池的密封可靠性。
在本申请第一方面的一些实施例中,所述挡胶结构设置于所述第一表面。
上述技术方案中,挡胶结构设置于第一表面,方便挡胶结构的设置。
在本申请第一方面的一些实施例中,所述挡胶结构为凸设于所述第一表面的第二凸起,所述第一箱体的部分位于所述第二侧壁和所述第二凸起之间。
上述技术方案中,挡胶结构为凸设于第一表面的第二凸起,第一箱体的部分位于第二侧壁和第二凸起之间,第二凸起不仅能够阻挡第一密封面和第二密封面之间的密封胶溢进封闭空间内,第二凸起还能限制第一箱体沿背离第二侧壁的方向形变,以使封闭空间保持较大的尺寸,降低因第一箱体沿背离第二侧壁的方向形变而与封闭空间内的结构干涉的风险。
在申请第一方面的一些实施例中,所述第一箱体包括相互连接的第一端壁和第一侧壁,所述第一密封面设置于所述第一侧壁,所述第二箱体包括第二端壁,所述第一端壁和所述第二端壁在第一方向上相对布置,所述第一方向垂直所述第一表面;所述第二端壁设置有容纳槽,所述第二密封面设置于所述容纳槽的槽壁上,所述第一侧壁插入所述容纳槽,并且,所述容纳槽内填充有密封胶。
上述技术方案中,第一侧壁插设于容纳槽内,不仅能够对第一侧壁起到限位作用,还能限制第一侧壁向朝向封闭空间变形方向或者向背离封闭空间的方向变形,容纳槽内填充有密封胶,不仅能够提高密封性能,密封胶还能在容纳槽内连接第一箱体和第二箱体,则可以不需要设置其他连接件连接第一箱体和第二箱体,减少电池组装的步骤和节约成本。
在本申请第一方面的一些实施例中,沿所述第一方向投影,所述容纳槽的投影与所述电池单体的投影至少部分重合。
上述技术方案中,沿第一方向投影,容纳槽的投影与电池单体的投影至少部分重合,则电池单体可以充分利用封闭空间,以使提高电池单体的能量密度。电池单体还能够起到阻挡容纳槽内的密封胶溢进封闭空间的作用。
第二方面,本申请实施例提供了一种用电设备,包括上述任意实施例提供的电池。
上述技术方案中,用电装置采用上述提供的具有较高能量密度的电池,故具有较长的续航能力,满足更多的用电需求。
附图说明
为了更清楚地说明本申请实施例的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,应当理解,以下附图仅示出了本申请的某些实施例,因此不应被看作是对范围的限定,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,还可以根据这些附图获得其他相关的附图。
图1为本申请一些实施例提供的车辆的示意图;
图2为本申请一些实施例提供的电池的分解图;
图3为本申请一些实施例提供的第一箱体和第二箱体盖合后的示意图;
图4为图3中的第一密封面和第二密封面之间填充有密封胶的示意图;
图5为本申请另一些实施例提供的第一箱体和第二箱体盖合后的示意图;
图6为图5中的第一密封面和第二密封面之间填充有密封胶的示意图;
图7为本申请再一些实施例提供的第一箱体和第二箱体盖合后的示意图;
图8为图7中的第一密封面和第二密封面之间填充有密封胶的示意图;
图9为本申请一些实施例提供的电池的剖视图;
图10为本申请另一些实施例提供的电池的剖视图;
图11为本申请又一些实施例提供的第一箱体和第二箱体盖合后的示意图;
图12为本申请再另一些实施例提供的电池的剖视图;
图13为图11中D1处的放大图;
图14为本申请另再一些实施例提供的电池的剖视图;
图15为图14中D2处的放大图;
图16为本申请再另一些实施例提供的第一箱体和第二箱体盖合后的示意图;
图17为图16中的第一密封面和第二密封面之间填充有密封胶的示意图;
图18为再又一些实施例提供的第一箱体和第二箱体盖合后的示意图;
图19为图18中的第一密封面和第二密封面之间填充有密封胶的示意图;
图20为又另一些实施例提供的第一箱体和第二箱体盖合后的示意图;
图21为图20中的第一密封面和第二密封面之间填充有密封胶的示意图;
图22为本申请再一些实施例提供的电池的剖视图;
图23为又再一些实施例提供的第一箱体和第二箱体盖合后的示意图;
图24为又另一些实施例提供的第一箱体和第二箱体盖合后的示意图。
图标:1000-车辆;100-电池;10-电池单体;20-第一箱体;21-第一密封面;22-第一端壁;23-第一侧壁;24-第三侧壁;30-第二箱体;31-第一表面;32-第二密封面;33-第二端壁;34-第二侧壁;35-第四侧壁;40-密封胶;50-挡胶结构;51-第一凸起;511-第一抵靠面;52-凹槽;53-第二凸起;54-容纳槽;200-控制器;300-马达;X-第一方向;Y-第二方向;Z-第三方向;A-封闭空间;B-容胶空间;C-凹部。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚,下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。
因此,以下对在附图中提供的本申请的实施例的详细描述并非旨在限制要求保护的本申请的范围,而是仅仅表示本申请的选定实施例。基于本申请中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。
应注意到:相似的标号和字母在下面的附图中表示类似项,因此,一旦某一项在一个附图中被定义,则在随后的附图中不需要对其进行进一步定义和解释。
在本申请实施例的描述中,需要说明的是,指示方位或位置关系为基于附图所示的方位或位置关系,或 者是该申请产品使用时惯常摆放的方位或位置关系,或者是本领域技术人员惯常理解的方位或位置关系,仅是为了便于描述本申请和简化描述,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的限制。此外,术语“第一”、“第二”、“第三”等仅用于区分描述,而不能理解为指示或暗示相对重要性。
目前,从市场形势的发展来看,动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统,而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具,以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大,其市场的需求量也在不断地扩增。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如,本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以降低液体或其他异物影响电池单体的充电或放电的风险。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请实施例中,电池单体可以为二次电池,二次电池是指在电池单体放电后可通过充电的方式使活性材料激活而继续使用的电池单体。
电池单体可以为锂离子电池、钠离子电池、钠锂离子电池、锂金属电池、钠金属电池、锂硫电池、镁离子电池、镍氢电池、镍镉电池、铅蓄电池等,本申请实施例对此并不限定。
电池单体可以包括电极组件。电极组件可以包括正极、负极以及隔离件。在电池单体充放电过程中,活性离子(例如锂离子)在正极和负极之间往返嵌入和脱出。隔离件设置在正极和负极之间,可以起到降低正负极短路的风险的作用,同时可以使活性离子通过。
在一些实施方式中,电池单体还可以包括电解质,电解质在正、负极之间起到传导离子的作用。电解质可以是液态的、凝胶态的或固态的。其中,液态电解质可以包括电解质盐和溶剂。固态电解质可以包括聚合物固态电解质、无机固态电解质、复合固态电解质。
在一些实施方式中,电极组件可以为卷绕结构。正极片、负极片卷绕成卷绕结构。
在一些实施方式中,电极组件的形状可以为圆柱状。
在一些实施方式中,电极组件设有极耳,极耳可以将电流从电极组件导出。极耳包括正极耳和负极耳。
在一些实施方式中,电池单体可以包括外壳。外壳用于封装电极组件及电解质等部件。外壳可以为钢壳、铝壳、塑料壳(如聚丙烯)、复合金属壳(如铜铝复合外壳)或铝塑膜等。
作为示例,电池单体可以为圆柱形电池单体、棱柱电池单体、软包电池单体或其它形状的电池单体。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。
在一些实施例中,电池可以为电池模块,电池单体有多个时,多个电池单体排列并固定形成一个电池模块。
在一些实施例中,电池可以为电池包,电池包包括箱体和电池单体,电池单体或电池模块容纳于箱体中。箱体可以包括第一箱体和第二箱体,第一箱体和第二箱体连接,以共同围成封闭空间。第二箱体具有第一表面,第一表面用于承载电池单体,电池单体设置于封闭空间内以降低液体或其他异物影响电池单体的充电或放电的风险。
在一些实施例中,箱体可以作为车辆的底盘结构的一部分。例如,箱体的部分可以成为车辆的地板的至少一部分,或者,箱体的部分可以成为车辆的横梁和纵梁的至少一部分。
在一些实施例中,电池可以为储能装置。储能装置包括储能集装箱、储能电柜等。
电池的箱体包括第一箱体和第二箱体,第一箱体和第二箱体相互扣合以形成容纳电池单体的封闭空间,第一箱体和第二箱体之间通过密封连接以密封封闭空间。相关技术中,第一箱体和第二箱体的边缘均设置有向电池外侧凸出的法兰结构(通常沿平行于箱体承载电池单体的表面的方向凸出),第一箱体的法兰结构形成一个密封面,第二箱体的法兰结构形成一个密封面,两个密封面均与平行箱体承载电池单体的表面的方向平行,第一箱体的法兰结构的密封面和第二箱体的法兰结构的密封面形成的密封界面也与平行箱体承载电池单体的表面的方向平行,然而,凸出的法兰结构会占用平行于第一表面的方向的空间,导致电池空间利用率低,影响电池的体积能量密度。
基于上述考虑,为了改善因通过在第一箱体和第二箱体的边缘形成法兰结构实现密封而使法兰结构占用额外的空间,导致电池空间利用率低,影响电池能量密度的问题,本申请实施例提供了一种电池,电池包括电池单体、第一箱体和第二箱体;第一箱体包括第一密封面;第二箱体包括第一表面和第二密封面,第一表面用于承载电池单体;第一箱体与第二箱体共同围合形成容纳电池单体的封闭空间,第一密封面与第二密封面配合以用于密封封闭空间;第一密封面与第一表面相交,第二密封面与第一表面相交。
第一密封面和第二密封均与第一表面相交,也即第一密封面与第一表面不平行,第二密封面与第一表面不平行,在同样的密封宽度情况下,相对于第一密封面和第二密封面平行第一表面的情况,第一密封面和第二密封均与第一表面相交能够减少第一密封面和第二密封面在平行第一表面且与第一密封面和第二密封面相交的方向上的空间占用,从而提高了电池在该平行第一表面且与第一密封面和第二密封均相交的方向上的空间利用率,以容纳更多的电池单体或者减小电池的体积,进而提高电池的体积能量密度。
本申请实施例公开的电池可以但不限用于电池柜、集装箱式储能装置等。储能装置可以包括多个本申请公开的电池。
本申请实施例公开的电池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装置,用电装置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、重卡、大巴、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装置为车辆为例进行说明。
请参照图1,图1为本申请一些实施例提供的车辆1000的示意图。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。该车辆1000的类型可以为轿车、越野车、重卡或大巴等。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。
如图2、图3、图4所示,本申请一些实施例提供一种电池100,电池100包括电池单体10、第一箱体20和第二箱体30;第一箱体20包括第一密封面21;第二箱体30包括第一表面31和第二密封面32,第一表面31用于承载电池单体10;第一箱体20与第二箱体30共同围合形成容纳电池单体10的封闭空间A,第一密封面21与第二密封面32配合以用于密封封闭空间A;第一密封面21与第一表面31相交,第二密封面32与第一表面31相交。
第一箱体20和第二箱体30共同形成电池100的箱体。电池单体10容纳于由第一箱体20和第二箱体30限定出的封闭空间A内。电池100可以包括一个或者多个电池单体10。在电池100包括多个电池单体10的实施例中,多个电池单体10之间可以串联、并联或者混联,混联是指多个电池单体10支架既有串联又有并联。
第二箱体30具有用于承载电池单体10的第一表面31,第一表面31用于承载电池单体10可以理解为第一表面31是第二箱体30用于放置电池单体10的表面或者第一表面31是第二箱体30用于承受电池单体10的主要重力的表面。第二箱体30可以视作承载电池单体10的主要部位。例如,第二箱体30可以作为电池100的下箱体,下箱体的底壁面向电池单体10的表面可以为第一表面31。第一箱体20可以视作电池100的上箱体。第一箱体20和第二箱体30在第一方向X上相互盖合,以限定出封闭空间A。
在一些实施例中,第一箱体20和第二箱体30的材料可以分别为铝、铝合金、不锈钢或者塑料等。第一箱体20和第二箱体30的材料可以相同,也可以不相同。
在一些实施例中,第二箱体30作为主要承载电池单体10的部件,第二箱体30可以选用结构强度较强的材料制得,例如采用铝合金、钢或者其他具有较高结构强度的材料制造,第一箱体20可以采用密度较低的材料制得,例如塑料制得,以使得第一箱体20的质量尽可能地不对电池100的质量能量密度造成影响,还有利于减轻电池100的重量。
第一箱体20和第二箱体30用于为电池单体10提供封闭空间A。在一些实施例中,第一箱体20与第二箱体30相互盖合,以限定出用于容纳电池单体10的封闭空间A。当然,第一箱体20与第二箱体30的连接处可通过密封件(图未示出)来实现密封,密封件可以是密封圈、密封垫、密封胶40等。
第一箱体20和第二箱体30可以是多种形状,比如,长方体、圆柱体等。第一箱体20可以是一侧开口形成有容纳电池单体10的容纳腔的空心结构,第二箱体30也可以是一侧开口形成有容纳电池单体10的容纳腔的空心结构,第一箱体20的开口侧盖合于第二箱体30的开口侧,则形成具有封闭空间A的箱体。当然,也可以是第一箱体20为一侧开口形成有容纳电池单体10的容纳腔的空心结构,第二箱体30为板状结构,第二箱体30盖合于第一箱体20的开口侧,则形成具有封闭空间A的箱体。当然,也可以是第二箱体30为一侧开口形成有容纳电池单体10的容纳腔的空心结构,第一箱体20为板状结构,第一箱体20盖合于第二箱体30的开口侧,则形成具有封闭空间A的箱体。
第一密封面21是第一箱体20用于与第二箱体30密封连接的表面。第二密封面32是第二箱体30用于与第一箱体20的第一密封面21共同形成密封封闭空间A的密封界面的表面。第一密封面21和第二密封面32配合实现对封闭空间A的密封,以降低外部环境对封闭空间A内的电池单体10的干扰的风险,以使电池100能够正常工作,提高电池100的可靠性。
第一密封面21和第二密封面32之间形成密封连接的方式有多种,比如第一箱体20和第二箱体30在第一密封面21和第二密封面32处焊接连接,从而实现密封连接;再比如,第一密封面21和第二密封面32之间夹持有密封垫,通过连接件将第一箱体20和第二箱体30锁紧,以使密封垫稳定夹持在第一密封面21和第二密封面32之间,从而实现密封;再比如,第一密封面21和第二密封面32之间填充有密封胶40,密封胶40粘接第一密封面21和第二密封面32,从而实现密封。
“第一密封面21和第一表面31相交”并非仅指第一密封面21和第一表面31直接相交,也可以是第一密封面21的延伸面和第一表面31的延伸面相交,或者第一密封面21所在平面和第一表面31所在平面相交。第一密封面21和第一表面31相交,换句话说,第一密封面21和第一表面31不平行。第一密封面21和第一表面31可以垂直相交也可以是非垂直相交。第一密封面21和第一表面31非垂直相交是指第一密封面21和第一表面31可以呈钝角或者锐角相交。
“第二密封面32和第一表面31相交”并非仅指第二密封面32和第一表面31直接相交,也可以是第二密封面32的延伸面和第一表面31的延伸面相交,或者是第二密封面32所在平面和第一表面31所在平面相交。第二密封面32和第一表面31相交,换句话说,第二密封面32和第一表面31不平行。第二密封面32和第一表面31可以垂直相交也可以是非垂直相交。第二密封面32和第一表面31非垂直相交是指第二密封面32和第一表面31可以呈钝角或者锐角相交。
第一密封面21和第二密封均与第一表面31相交,也即第一密封面21与第一表面31不平行,第二密封面32与第一表面31不平行,在同样的密封宽度情况下,相对于第一密封面21和第二密封面32平行第一表面31的情况,第一密封面21和第二密封均与第一表面31相交能够减少第一密封面21和第二密封面32在平行第一表面31且与第一密封面21和第二密封面32相交的方向上的空间占用,从而提高了电池100在该平行第一表面31且与第一密封面21和第二密封均相交的方向上的空间利用率,以容纳更多的电池单体10或者减小电池100的体积,进而提高电池100的体积能量密度。
在一些实施例中,第一密封面21和第二密封面32中的至少一者与第一表面31垂直。
如图3-图6所示,第一密封面21和第二密封面32中可以仅一者与第一表面31垂直相交,另一者与第一表面31非垂直相交。可以是第一密封面21与第一表面31垂直相交,第二密封面32与第一密封面21非垂直相交。也可以是第一密封面21与第一表面31非垂直相交,第二密封面32与第一表面31垂直相交。
第一密封面21和第二密封面32可以均与第一表面31垂直相交。
第一密封面21和第二密封面32中的至少一者与第一表面31垂直,能够减少第一密封面21和第二密封面32中与第一表面31垂直的一者在平行第一表面31且与第一密封面21和第二密封面32相交的方向上的空间占用,使得第一密封面21和第二密封面32中与第一表面31垂直的一者充分利用了垂直第一表面31的方向上的空间,有利于提高电池100的体积能量密度。
如图3-图6所示,在一些实施例中,第一密封面21和第二密封面32中的一者与第一表面31垂直,第一密封面21和第二密封面32中的另一者与第一表面31非垂直且相交。
在一些实施例中,可以是第一密封面21和第一表面31垂直相交,第二密封面32与第一表面31与第一表面31非垂直且相交。
在另一些实施例中,可以是第二密封面32和第一表面31垂直相交,第一密封面21和第一表面31非垂直相交。
第一密封面21和第二密封面32中的一者与第一表面31垂直,另一者与第一表面31非垂直且相交,不仅能够减少第一密封面21和第二密封面32在平行第一表面31且与第一密封面21和第二密封面32相交的方向上的空间占用,从而提高了电池100在该平行第一表面31且与第一密封面21和第二密封均相交的方向上的空间利用率,以容纳更多的电池单体10或者减小电池100的体积,进而提高电池100的体积能量密度,还能充分利用垂直第一表面31的方向上的空间,进一步提高电池100的体积能量密度。
在第一密封面21和第二密封面32中的一者与第一表面31垂直相交,另一者与第一表面31非垂直相交的实施例中,如图3-图6所示,第一密封面21和第二密封面32中与第一表面31相互垂直的一者位于另一者远离封闭空间A的一侧。
若第一密封面21与第一表面31垂直相交,第二密封面32与第一表面31非垂直相交,第一密封面21相对第二密封面32更远离封闭空间A,也可以是第一密封面21位于第二密封面32的外侧。
若第二密封面32与第一表面31垂直相交,第一密封面21与第一表面31非垂直相交,第二密封面32相 对第一密封面21更远离封闭空间A,也可以是第二密封面32位于第一密封面21的外侧。
第一密封面21和第二密封面32中与第一表面31相互垂直的一者位于另一者远离封闭空间A的一侧,则第一密封面21和第二密封面32中与第一表面31非垂直相交的一者靠近封闭空间A设置,能够充分利用第一箱体20和第二箱体30形成的箱体的内部空间,减小电池100的外部尺寸,有利于提高电池100的体积能量密度。
在一些实施例中,第二密封面32垂直第一表面31,第二密封面32位于第一密封面21远离封闭空间A的一侧。
第二密封面32与第一表面31垂直相交,第二密封面32与第一表面31非垂直。
第二密封面32垂直第一表面31,第二密封面32位于第一密封面21远离封闭空间A的一侧,不仅使得第二密封面32能够利用垂直第一表面31的方向上的空间,还方便第一箱体20和第二箱体30组装。
根据第一箱体20和第二箱体30的结构不同的,第一密封面21和第二密封的设置位置也有所不同。
如图3-图6所示,在一些实施例中,第一箱体20包括相互连接的第一端壁22和第一侧壁23,第一密封面21设置于第一侧壁23;第二箱体30包括相互连接的第二端壁33和第二侧壁34,第二端壁33具有第一表面31且与第一端壁22沿第一方向X相对设置,第一方向X垂直于第一表面31,第二密封面32设置于第二侧壁34。
第一侧壁23连接于第一端壁22沿第二方向Y的端部,第一侧壁23从第一端壁22向靠近第二箱体30的方向延伸。
第二方向Y是平行第一表面31的方向,第一方向X垂直第二方向Y,第一密封面21和第二密封面32可以均与第二方向Y相交。在一些实施例中,第二方向Y可以电池100的宽度方向,第一密封面21和第二密封面32均与第一表面31相交,则第一密封面21和第二密封面32均与第二方向Y相交,也可以说第一密封面21和第二密封面32均与电池100的宽度方向相交,在同样的密封宽度情况下,相对于第一密封面21和第二密封面32平行第一表面31(第一密封面21和第二密封面32平行第二方向Y)的情况,第一密封面21和第二密封面32均与第一表面31相交能够减少第一密封面21和第二密封面32在第二方向Y上的空间占用,从而提高了电池100在第二方向Y上的空间利用率,以容纳更多的电池单体10或者减小电池100的体积,进而提高电池100的体积能量密度。电池100在宽度方向尺寸较小,还能有利于减小使用该电池100供电的用电设备的在电池100的宽度方向的尺寸,比如,用电设备为重卡,重卡通过本申请实施例提供的电池100供电,重卡在电池100的宽度方向的尺寸可以做得较小。一般电池100的宽度方向和重卡的宽度方向基本一致,即重卡可以在其宽度方向的尺寸较小。
第一箱体20和第二箱体30可以看作是在电池100的高度方向上相互盖合,以限定出封闭空间A。电池100的高度方向与第一方向X基本一致。在一些实施例中,电池100的高度方向可以与重卡的高度方向基本一致。
第一端壁22和第一侧壁23可以是一体成型。第一端壁22和第一侧壁23可以是分体设置,再连接形成第一箱体20,第一端壁22和第一侧壁23的连接方式包括但不限于焊接连接、粘接连接、螺钉连接等。
第一密封面21可以是第一侧壁23在第二方向Y上面向封闭空间A的表面的至少一部分或者是背离封闭空间A的表面的至少一部分。
第二侧壁34连接于第二端壁33沿第二方向Y的与第一侧壁23相对应的端部,第二侧壁34从第二端壁33向靠近第一箱体20的方向延伸。
第二端壁33和第二侧壁34可以是一体成型。第二端壁33和第二侧壁34可以是分体设置,再连接形成第二箱体30,第二端壁33和第二侧壁34的连接方式包括但不限于焊接连接、粘接连接、螺钉连接等。
第二端壁33在第一方向X上面向第一端壁22的表面为第一表面31。第二密封面32可以是第二侧壁34在第二方向Y上面向封闭空间A的表面的至少一部分或者是背离封闭空间A的表面的至少一部分。
第一箱体20包括相互连接的第一端壁22和第一侧壁23,第二箱体30包括相互连接的第二端壁33和第二侧壁34,一方面方便能够使得第一箱体20和第二箱体30围合成用于容纳电池单体10的封闭空间A,另一方面,第一密封面21设置于第一侧壁23,第二密封面32设置于第二侧壁34,能够使得第一密封面21和第二密封面32的面积较大,以与第二密封面32之间形成良好的连接关系以及良好的密封性,使得电池100具有较高的可靠性,还使得第一箱体20和第二箱体30的结构简单,便于制造。
如图3-图6所示,在一些实施例中,第一箱体20包括两个第一侧壁23,两个第一侧壁23分别连接于第一端壁22沿第二方向Y的两端。第二箱体30包括两个第二侧壁34,两个第二侧壁34分别连接于第二端壁33沿第二方向Y的两端。每个第一侧壁23设置有第一密封面21,每个第二侧壁34设置有第二密封面32。第一侧壁23和第二侧壁34一一对应设置,第一密封面21和第二密封面32一一对应设置。每个第一侧壁23的第一密封面21与与之对应的第二侧壁34的第二密封面32配合在第二方向Y上密封封闭空间A。
如图3-图6所示,在一些实施例中,第一密封面21与第一表面31非垂直且相交,第一侧壁23和第一端壁22呈钝角连接;或者,如图7、图8所示,第二密封面32与第一表面31非垂直且相交,第二侧壁34和第二端壁33呈钝角连接。
如图3-图6所示,第一侧壁23和第一端壁22呈钝角连接,第一密封面21与第一表面31呈锐角相交。在第一箱体20包括两个第一侧壁23的实施例中,两个第一侧壁23均与第一端壁22呈钝角连接,两个第一侧壁23呈八字布置。
如图7、图8所示,第二侧壁34和第二端壁33呈钝角连接,第二密封面32与第一表面31呈钝角相交。在第二箱体30包括两个第二侧壁34的实施例中,两个第二侧壁34均与第二端壁33呈钝角连接,两个第二侧壁34呈倒八字布置。
第一侧壁23和第一端壁22呈钝角连接,使得第一密封面21和第一表面31非垂直相交,方便第一密封面21和第二密封面32之间的空间填充密封胶40或设置密封垫,有利于第一箱体20和第二箱体30之间形成可靠的密封关系。第二侧壁34和第二端壁33呈钝角连接,使得第二密封面32和第一表面31非垂直相交,方便第一密封面21和第二密封面32之间的空间填充密封胶40或设置密封垫,有利于第一箱体20和第二箱体30之间形成可靠的密封关系。
如图3-图6所示,在第一端壁22和第一侧壁23呈钝角布置的实施例中,第二端壁33和第二侧壁34可以呈垂直布置。第二侧壁34位于第一侧壁23的外侧,即第二侧壁34位于第一侧壁23背离封闭空间A的一侧。第一侧壁23面向第二侧壁34的表面的至少一部分形成第一密封面21。第一侧壁23面向第二侧壁34的表面也是第一侧壁23背离封闭空间A的表面。第二侧壁34面向第一侧壁23的表面的至少一部分形成第二密封面32。第二侧壁34面向第一侧壁23的表面也是第二侧壁34面向封闭空间A的表面。
如图3-图8所示,在一些实施例中,第一密封面21和第二密封面32共同形成用于容纳密封胶40的容胶空间B。
在第一侧壁23和第一端壁22呈钝角布置,第二侧壁34和第二端壁33垂直布置的实施例中,第一密封面21和第二密封面32形成的容胶空间B的横截面可以呈三角形结构,以在容胶空间B背离第二端壁33的一端形成较大的开口,以方便向容胶空间B内填充容胶空间B。
容胶空间B内可以填充密封胶40。密封胶40可以是有一定粘接性的密封材料,还能在容胶空间B内起到防泄漏、防水、防振动、隔热等作用。密封胶40可以是硅酮密封胶40、聚氨酯密封胶40、聚硫密封胶40、丙烯酸密封胶40、厌氧密封胶40、丁基密封胶40、氯丁密封胶40、PVC密封胶40、沥青密封胶40等。
第一密封面21和第二密封面32共同形成用于容纳密封胶40的容胶空间B,可以通过在容胶空间B内设置密封胶40,不仅能够提高对封闭空间A的密封性能,还能通过密封胶40粘接第一密封面21和第二密封面32,提高第一箱体20和第二箱体30连接稳定性,密封胶40粘接第一密封面21和第二密封面32,则可以不需要设置其他连接件连接第一箱体20和第二箱体30,减少电池100组装的步骤和节约成本。
在另一些实施例中,第一密封面21和第二密封面32之间形成的空间还可以用于容纳密封垫、密封圈等密封件(图中未示出)。密封件被夹持在第一密封面21和第二密封面32之间。密封件和第一密封面21可以是抵接或者粘接,密封件和第二密封面32可以是抵接或者粘接。
如图9-图10所示,在一些实施例中,沿第一方向X投影,容胶空间B的投影与电池单体10的投影至少部分重合。
在第一侧壁23和第一端壁22呈钝角布置,第二侧壁34和第二端壁33垂直的实施例中,容胶空间B的至少部分可以延伸至电池单体10背离第一表面31的一侧,沿第一方向X投影,容胶空间B延伸至电池单体10背离第一表面31的一侧的部分的投影与电池单体10的投影至少部分重叠。
容胶空间B的可以是一部分延伸至电池单体10背离第一表面31的一侧,容胶空间B也可以是全部位于电池单体10背离第一表面31的一侧。
沿第一方向X投影,容胶空间B的投影与电池单体10的投影至少部分重合,则容胶空间B可以尽可能地少占用平行第一表面31的方向上的空间,充分利用了垂直第一表面31的方向上的空间,容胶空间B在尽可能地少占用平行第一表面31的方向上的空间的条件下,具有较大的密封面积,以提高第一密封面21和第二密封面32之间的密封性,使得电池100具有较高的可靠性。
如图3-图6所示,在一些实施例中,电池100还包括挡胶结构50,挡胶结构50设置于封闭空间A与容胶空间B的相接处。
挡胶结构50用于阻挡填充于容胶空间B内的密封胶40,以降低容胶空间B内的密封胶40溢进封闭空间A的风险。
挡胶结构50设置于封闭空间A与容胶空间B的相接处,也可以理解为挡胶结构50设置于封闭空间A与容胶空间B的交界处。
封闭空间A与容胶空间B的相接处设置有挡胶结构50,挡胶结构50可以限制设置在容胶空间B内的密封胶40溢流至封闭空间A内,减少密封胶40浪费,还能使电池100具有较好的密封性能,有利于提高电池100的 密封可靠性。
如图3-图6所示,在第一端壁22和第一侧壁23呈钝角布置,第二端壁33和第二侧壁34垂直的实施例中,挡胶结构50设置于第二侧壁34。
挡胶结构50设置于第二侧壁34可以沿重力方向支撑第一箱体20,能够限制第一箱体20沿靠近第二端壁33的方向移动,以使第一箱体20和第二箱体30形成的一定尺寸的封闭空间A。
挡胶结构50可以通过支撑第一侧壁23背离第一端壁22的一端,从而支撑第一箱体20。
如图3、图4所示,挡胶结构50为凸设于第二侧壁34的内表面的第一凸起51,第一箱体20支撑于第一凸起51。
第二侧壁34的内表面是第二侧壁34面向封闭空间A的表面。挡胶结构50为设置于第二侧壁34的内表面的第一凸起51。第一凸起51沿第二方向Y凸出第一内表面延伸至封闭空间A内。
第一凸起51和第二侧壁34可以是一体成型,以方便第二箱体30的制造成型。第一凸起51和第二侧壁34可以分体设置,再将第一凸起51连接于第二侧壁34,第一凸起51和第二侧壁34的连接方式有多种,比如焊接连接、粘接连接、螺钉连接等。
沿第一方向X,第一凸起51具有位于背离第二端壁33的一侧第一抵靠面511。第一侧壁23远离第一端壁22的一端抵靠于第一抵靠面511。在第二箱体30包括两个第二侧壁34的实施例中,两个第二侧壁34的第一内表面均设置有第一凸起51,第一箱体20的两个第一侧壁23远离第一端壁22的一端分别与两个第一凸起51的第一抵靠面511抵靠。两个第一凸起51的第一抵靠面511可以位于同一平面内,以第一箱体20的两个第一侧壁23的背离第一端壁22的一端在第一方向X上可以等高。
第一凸起51不仅能够起到阻挡容胶空间B内的密封胶40进入封闭空间A的作用,还能限制第一箱体20向靠近第二端壁33的方向移动,以使封闭空间A保持一定容纳电池单体10的尺寸。
因此,挡胶结构50为凸设于第二侧壁34的内表面的第一凸起51,不仅能够阻挡容胶空间B内的密封胶40溢进封闭空间A内,还能支撑第一箱体20,限制第一箱体20向靠近第二箱体30的方向移动,以使封闭空间A保持较大的尺寸。
在一些实施例中,沿第一方向X,第一抵靠面511与第二侧壁34背离第二端壁33的一端的距离小于第一抵靠面511和第一表面31之间的距离,这样第一箱体20可以较为靠近第二侧壁34背离第二端壁33的一端,以方便第一箱体20和第二箱体30的组装。这样的第二箱体30的第二侧壁34沿第一方向X的尺寸较高,第二箱体30可以为高箱壁结构,第二箱体30也可以称之为高立壁结构。第一箱体20的第一侧壁23的尺寸则可以设置得较小,方便第一箱体20和第二箱体30组装。
如图3、图4所示,在一些实施例中,第一凸起51面向第二端壁33的一端可以与第二端壁33之间形成间隙,减少第一凸起51对封闭空间A的占用和降低第一凸起51与封闭空间A内部结构干涉的风险。
如图11所示,在另一些实施例中,第一凸起51面向第二端壁33的一端可以延伸至第二端壁33,第二端壁33能够对第一凸起51起到支撑作用,则第一端壁22和第一凸起51可以共同支撑第一箱体20,降低第一凸起51因承受第一箱体20的重量而与第二侧壁34脱离的风险。
如图5、图6所示,在另一些实施例中,挡胶结构50为设置于第二侧壁34的内表面的凹槽52,第一箱体20的部分位于凹槽52内。
挡胶结构50可以为设置于第一内表面的凹槽52,第一箱体20的至少部分插设于凹槽52,凹槽52的槽壁面支撑第一箱体20。
在第一箱体20包括第一端壁22和第一侧壁23的实施例中,第一侧壁23可以插设于凹槽52内,凹槽52的槽壁面与第一侧壁23远离第一端壁22的一端抵靠。
在一些实施例中,沿第一方向X,凹槽52可以延伸至第二侧壁34远离第二端壁33的端面,这样可以在第二侧壁34形成有L形的凹槽52,凹槽52的槽侧壁和槽底面均可以与第一侧壁23远离第一端壁22的一端抵靠。凹槽52面向第密封面的表面既可以抵靠第一侧壁23,也可以形成第二密封面32。其中,凹槽52的槽侧面可以是凹槽52的与第一方向X平行的槽壁面,凹槽52的槽底面可以是凹槽52的与第一方向X相交的槽壁面。
在第二箱体30包括两个第二侧壁34的实施例中,两个第二侧壁34的第一内表面均设置有凹槽52,第一箱体20的两个第一侧壁23远离第一端壁22的一端分别与两个凹槽52的槽壁面抵靠。两个凹槽52的槽底面可以位于同一平面内,以第一箱体20的两个第一侧壁23的背离第一端壁22的一端在第一方向X上可以等高。
凹槽52不仅能够起到阻挡容胶空间B内的密封胶40进入封闭空间A的作用,凹槽52的槽底面还能限制第一箱体20向靠近第二端壁33的方向移动,以使封闭空间A保持一定容纳电池单体10的尺寸。
挡胶结构50为设置于第二侧壁34的内表面的凹槽52,不仅能够阻挡容胶空间B内的密封胶40溢进封 闭空间A内,还能减轻第二箱体30的重量,这样的挡胶结构50也不会与封闭空间A内的结构干涉。
在一些实施例中,沿第一方向X,凹槽52的槽底面与第二侧壁34背离第二端壁33的一端的距离小于凹槽52的槽底面和第一表面31之间的距离,这样第一箱体20可以较为靠近第二箱体30的开口侧,以方便第一箱体20和第二箱体30的组装。这样的第二箱体30的第二侧壁34沿第一方向X的尺寸较高,第二箱体30可以为高箱壁结构,第二箱体30也可以称之为高立壁箱体,第一箱体20的第一侧壁23的尺寸则可以设置得较小,方便第一箱体20和第二箱体30组装。
挡胶结构50设置于第二侧壁34,降低挡胶结构50和电池单体10的干涉的风险。
如图12-图15所示,在一些实施例中,第二侧壁34自第二端壁33的端部沿第一方向X朝远离电池单体10的一侧弯折形成凹部C,第一侧壁23插入凹部C中;或者,第一侧壁23自第一端壁22的端部沿第一方向X朝远离电池单体10的一侧弯折形成凹部C,第二侧壁34插入凹部C中;凹部C用于容纳密封胶40。
如图12、图13所示,第二侧壁34从第二端壁33的一端弯折,形成开口沿第一方向X朝向第一端壁22的凹部C,第二侧壁34经过弯折后,第二侧壁34的内侧面的一部分形成凹部C的壁面,第二侧壁34的内侧面的一部分可以形成第二密封面32。在这种实施例中,第二侧壁34的内侧面是指在弯折前,第二侧壁34在第二方向Y向面向电池单体10的表面。第二侧壁34弯折形成凹部C后,凹部C在第一方向X上的底壁背离封闭空间A的表面可以凸出于第二端壁33背离封闭空间A的表面。通过弯折形成凹部C,对第二箱体30的强度影响较小。
第一侧壁23插设于凹部C中,第一侧壁23在第二方向Y上背离封闭空间A的表面的至少部分形成第一密封面21。第一密封面21和第二密封面32可以贴合,密封胶40容纳于凹部C内并位于第一侧壁23面向封闭空间A一侧,密封胶40能够连接第一侧壁23面向封闭空间A的表面和凹部C的与第一侧壁23面向封闭空间A的表面相对的壁面,以使第一密封面21、第二密封面32和密封胶40共同密封封闭空间A。
当然,在另一些实施例中,第一密封面21和第二密封面32之间也可以形成容纳密封胶40的空间,密封胶40可以容纳在凹部C内并全部位于第一密封面21和第二密封面32之间,密封胶40也可以容纳在凹部C内并部分位于第一密封面21和第二密封面32之间,密封胶40能够连接第一密封面21和第二密封面32,另一部分位于第一侧壁23面向封闭空间A一侧,密封胶40能够连接第一侧壁23面向封闭空间A的表面和凹部C的与第一侧壁23面向封闭空间A的表面相对的壁面,不仅能够提高密封性能,还能提高第一侧壁23在凹部C内的稳定性。其中,在第一密封面21和第二密封面32之间也可以形成容纳密封胶40的空间,密封胶40容纳在凹部C内并全部位于第一密封面21和第二密封面32之间的实施例中,第一侧壁23面向封闭空间A的表面和凹部C的与第一侧壁23面向封闭空间A的表面可以贴合,也可以形成间隙。
在第二箱体30包括两个第二侧壁34的实施例中,两个第二侧壁34可以均弯折形成凹部C,两个第二侧壁34的凹部C分别位于第二端壁33沿第二方向Y的两端。两个第一侧壁23可以分别对应插设于两个第二侧壁34弯折形成的凹部C内。
如图14、图15所示,第一侧壁23从第一端壁22的一端弯折,形成开口沿第一方向X朝向第二端壁33的凹部C,第一侧壁23经过弯折后,第一侧壁23的内侧面的一部分形成凹部C的壁面,第一侧壁23的内侧面的一部分可以形成第一密封面21。在这种实施例中,第一侧壁23的内侧面是指在弯折前,第一侧壁23在第二方向Y向面向电池单体10的表面。第一侧壁23弯折形成凹部C后,凹部C在第一方向X上的底壁背离封闭空间A的表面可以凸出于第一端壁22背离封闭空间A的表面。
通过弯折形成凹部C,对第一箱体20的强度影响较小。
第二侧壁34插设于凹部C中,第二侧壁34在第二方向Y上背离封闭空间A的表面的至少部分形成第二密封面32。第一密封面21和第二密封面32可以贴合,密封胶40容纳于凹部C内并位于第二侧壁34面向封闭空间A一侧,密封胶40能够连接第二侧壁34面向封闭空间A的表面和凹部C的与第二侧壁34面向封闭空间A的表面相对的壁面,以使第一密封面21、第二密封面32和密封胶40共同密封封闭空间A。
当然,在另一些实施例中,第一密封面21和第二密封面32之间也可以形成容纳密封胶40的空间,密封胶40可以容纳在凹部C内并全部位于第一密封面21和第二密封面32之间,密封胶40也可以容纳在凹部C内并部分位于第一密封面21和第二密封面32之间,密封胶40能够连接第一密封面21和第二密封面32,另一部分位于第二侧壁34面向封闭空间A一侧,密封胶40能够连接第二侧壁34面向封闭空间A的表面和凹部C的与第二侧壁34面向封闭空间A的表面相对的壁面,不仅能够提高密封性能,还能提高第一侧壁23在凹部C内的稳定性。其中,在第一密封面21和第二密封面32之间也可以形成容纳密封胶40的空间,密封胶40容纳在凹部C内并全部位于第一密封面21和第二密封面32之间的实施例中,第二侧壁34面向封闭空间A的表面和凹部C的与第二侧壁34面向封闭空间A的表面可以贴合,也可以形成间隙。
在第一箱体20包括两个第一侧壁23的实施例中,两个第一侧壁23可以均弯折形成凹部C,两个第一侧壁23的凹部C分别位于第一端壁22沿第二方向Y的两端。两个第二侧壁34可以分别对应插设于两个第一侧壁23弯折形成的凹部C内。
第二侧壁34自第二端壁33的端部沿第一方向X朝远离电池单体10的一侧弯折形成凹部,可以在不降低 第二侧壁34的强度的基础上形成凹部,第一侧壁23插入凹部中,能够对第一侧壁23起到限位作用,提高第一箱体20和第二箱体30配合的稳定性。
在一些实施例中,沿第一方向X投影,凹部C的投影与电池单体10的投影至少部分重合。
沿第二方向Y,电池单体10的至少部分延伸至凹部C的开口处。在凹部C设置于第二端壁33沿第二方向Y相对布置的两端的实施例中,电池单体10沿第二方向Y延伸至凹部C的靠口,第一方向X投影,电池单体10的投影的一部分位于凹部C内。
沿第一方向X投影,凹部C的投影与电池单体10的投影至少部分重合,则电池单体10可以充分利用封闭空间A,以使提高电池单体10的能量密度。电池单体10还能够起到阻挡凹部C内的密封胶40溢进封闭空间A的作用。
如图16-图24所示,在一些实施例中,第一密封面21和第二密封面32均与第一表面31垂直。
第一密封面21和第二密封面32在平行第一表面31的方向上相对且平行布置。
第一密封面21和第二密封面32均与第一表面31垂直,相对于第一密封面21和第二密封面32平行第一表面31的情况,第一密封面21和第二密封均与第一表面31垂直能够使得第一密封面21和第二密封面32在平行第一表面31且与第一密封面21和第二密封面32相交的方向上占用的空间最少,使得第一密封面21和第二密封面32充分利用了垂直第一表面31的方向上的空间,从而提高了电池100在该平行第一表面31且与第一密封面21和第二密封均相交的方向上的空间利用率,以容纳更多的电池单体10或者减小电池100的体积,进而提高电池100的体积能量密度。
如图16-图22所示,在第一密封面21和第二密封面32均与第一表面31垂直的实施例中,第一箱体20包括相互连接的第一端壁22和第一侧壁23,第一密封面21设置于第一侧壁23;第二箱体30包括相互连接的第二端壁33和第二侧壁34,第二端壁33具有第一表面31且与第一端壁22沿第一方向X相对设置,第一方向X垂直于第一表面31,第二密封面32设置于第二侧壁34。
第一侧壁23连接于第一端壁22沿第二方向Y的端部,第一侧壁23从第一端壁22沿第一方向X向靠近第二箱体30的方向延伸。
第二方向Y是平行第一表面31的方向,第一方向X垂直第二方向Y。第二方向Y可以电池100的宽度方向,第一密封面21和第二密封面32均与第一表面31垂直,则第一密封面21和第二密封面32均与第二方向Y垂直,也可以说第一密封面21和第二密封面32均与电池100的宽度方向垂直,在同样的密封宽度情况下,相对于第一密封面21和第二密封面32平行第一表面31(第一密封面21和第二密封面32均平行第二方向Y)的情况,第一密封面21和第二密封面32均与第一表面31垂直能够减少第一密封面21和第二密封面32在第二方向Y上的空间占用,从而提高了电池100在第二方向Y上的空间利用率,以容纳更多的电池单体10或者减小电池100的体积,进而提高电池100的体积能量密度。电池100在宽度方向尺寸较小,还能有利于减小使用该电池100供电的用电设备的在电池100的宽度方向的尺寸,比如,用电设备为重卡,重卡通过本申请实施例提供的电池100供电,重卡在电池100的宽度方向的尺寸可以做得较小。一般电池100的宽度方向和重卡的宽度方向基本一致,即重卡可以在其宽度方向的尺寸较小。
第一端壁22和第一侧壁23垂直布置,以使第一密封面21垂直第一表面31。第二端壁33和第二侧壁34垂直布置,以使第二密封面32垂直第一表面31。第一侧壁23和第二侧壁34沿第二方向Y相对且平行布置。
第一侧壁23沿第二方向Y面向或者背离封闭空间A的表面的至少一部分形成第一密封面21。第二侧壁34沿第二方向Y面向或者背离封闭空间A的表面的至少一部分形成第二密封面32。
第一箱体20可以包括两个第一侧壁23,两个第一侧壁23分别连接于第一端壁22沿第二方向Y的两端,两个第一侧壁23均与第一端壁22垂直。第二箱体30可以包括两个第二侧壁34,两个第二侧壁34分别连接于第二端壁33沿第二方向Y的两端,两个第二侧壁34均与第二端壁33垂直。
在一些实施例中,在第二方向Y上,第二侧壁34位于第一侧壁23远离封闭空间A的一侧,第一侧壁23远离封闭空间A的表面的至少一部分形成第一密封面21,第二侧壁34靠近封闭空间A的表面的至少一部分形成第二密封面32。
第一箱体20包括相互连接的第一端壁22和第一侧壁23,第二箱体30包括相互连接的第二端壁33和第二侧壁34,一方面方便能够使得第一箱体20和第二箱体30围合成用于容纳电池单体10的封闭空间A,另一方面,第一密封面21设置于第一侧壁23,第二密封面32设置于第二侧壁34,能够使得第一密封面21和第二密封面32的面积较大,以与第二密封面32之间形成良好的连接关系以及良好的密封性,使得电池100具有较高的可靠性,还使得第一箱体20和第二箱体30的结构简单,便于制造。
如图16-图17所示,在一些实施例中,第一密封面21和第二密封面32之间填充有密封胶40。
第一密封面21和第二密封面32在第二方向Y相对间隔布置,第一密封面21和第二密封面32之间形成 容胶空间B。在第一侧壁23和第一端壁22垂直布置,第二侧壁34和第二端壁33垂直布置的实施例中,第一密封面21和第二密封面32之间的容胶空间B可以是等间距空间;第一密封面21和第二密封面32之间的容胶空间B也可以是沿第三方向Z上间距逐渐增大或者变小的变间距空间。
第一密封面21和第二密封面32之间填充有密封胶40,不仅能够提高对封闭空间A的密封性能,还能通过密封胶40粘接第一密封面21和第二密封面32,提高第一箱体20和第二箱体30连接稳定性,密封胶40粘接第一密封面21和第二密封面32则可以不需要设置其他连接件连接第一箱体20和第二箱体30,减少电池100组装的步骤和节约成本。
在第一密封面21和第二密封面32均垂直第一表面31的实施例中,第一密封面21和第二密封面32之间形成的空间还可以用于容纳密封垫、密封圈等密封件。密封件被夹持在第一密封面21和第二密封面32之间。密封件和第一密封面21可以是抵接或者粘接,密封件和第二密封面32可以是抵接或者粘接。
在一些实施例中,沿第二方向Y投影,密封胶40的投影与电池单体10的投影至少部分重合,第二方向Y平行于第一表面31且与第一侧壁23相交。
在第一密封面21和第二密封均与第一表面31垂直的实施例中,第一密封面21和第二密封面32之间的密封胶40的至少部分可以延伸至电池单体10沿第二方向Y的一侧,沿第二方向Y投影,密封胶40延伸至电池单体10在第二方向Y上的一侧的部分的投影与电池单体10的投影至少部分重叠。
密封胶40可以是一部分延伸至电池单体10在第二方向Y上的一侧,密封胶40也可以是全部位于电池单体10在第二方向Y上的一侧。
沿第二方向Y投影,密封胶40的投影与电池单体10的投影至少部分重合,能够减少密封胶40占用与第二方向Y相交的其他方向上的空间,密封胶40能够充分利用电池100在第二方向Y上的空间,从而有利于提高电池100的能量密度。与第二方向Y相交的其他方向,可以是与第二方向Y相交的任意方向,比如与第二方向Y垂直的第一方向X,与第一方向X和第二方向Y均垂直的第三方向Z。
在第一密封面21和第二密封面32均垂直第一表面31的实施例中,如图16-图20所示,电池100还包括挡胶结构50,挡胶结构50设置于封闭空间A靠近第一密封面21和第二密封面32的位置。
挡胶结构50用于阻挡填充于第一密封面21和第二密封面32限定出的容胶空间B内的密封胶40,以降低容胶空间B内的密封胶40溢进封闭空间A的风险。
挡胶结构50设置于封闭空间A靠近第一密封面21和第二密封面32的位置,可以理解为,挡胶结构50设置于封闭空间A与容胶空间B的相接处,也可以理解为挡胶结构50设置于封闭空间A与容胶空间B的交界处。
在封闭空间A靠近第一密封面21和第二密封面32的位置设置挡胶结构50,挡胶结构50可以限制设置在容胶空间B内的密封胶40溢流至封闭空间A内,减少密封胶40浪费,还能使电池100具有较好的密封性能,有利于提高电池100的密封可靠性。
如图16-图20所示,在一些实施例中,挡胶结构50可以设置于第一表面31。挡胶结构50设置于第一表面31,方便挡胶结构50的设置。
设置于第一表面31的挡胶结构50可以有多种形式,如图16、图17所示,挡胶结构50为凸设于第一表面31的第二凸起53,第一箱体20的部分位于第二侧壁34和第二凸起53之间。
挡胶结构50可以为凸出于第一表面31的第二凸起53,沿第一方向X,第一箱体20的至少部分位于第二侧壁34和第二凸起53之间。
在第一箱体20包括第一端壁22和第一侧壁23的实施例中,第一侧壁23远离第一端壁22的一端位于第二侧壁34和第二凸起53之间。第二凸起53位于第一侧壁23背离第二侧壁34的一侧,第一凸起51不仅能够限制第一密封面21和第二密封面32之间的密封胶40溢进封闭空间A内,还能够限制第一侧壁23向背离第一侧壁23的方向变形,以使封闭空间A保持最开始设置尺寸基本不变,降低因第一侧壁23沿背离第二侧壁34的方向变形与电池单体10挤压的风险,还能降低因第一侧壁23沿背离第二侧壁34的方向变形导致第一密封面21和第二密封面32之间的容胶空间B逐渐增大而导致密封胶40在第一密封面21和第二密封面32之间密封失效的风险。
在第一箱体20包括两个第一侧壁23、第二箱体30包括两个第二箱体30的实施例中,第一表面31可以设置两个第一凸起51,两个第一凸起51分别靠近两个第二侧壁34设置,两个第一侧壁23分别插设于两个第一凸起51和两个第一侧壁23之间。
如图18-图21所示,在一些实施例中,第一箱体20包括相互连接的第一端壁22和第一侧壁23,第一密封面21设置于所述第一侧壁23,第二箱体30包括第二端壁33,第二端壁33设置有容纳槽54,第二密封面32设置于容纳槽54的槽壁上,第一侧壁23插入容纳槽54,并且,容纳槽54内填充有密封胶40。
第二端壁33的第一表面31形成有容纳槽54,容纳槽54可以从第一表面31向背离第一端壁22的方向凹陷,容纳槽54延伸至第二侧壁34,第二侧壁34面向封闭空间A的表面的至少一部分既作为第二密封面32,又作 为容纳槽54的一个槽壁面,容纳槽54与第二侧壁34相对布置的一个槽壁面形成挡胶结构50,也可以将容纳槽54看作挡胶空间。
第一箱体20的部分插设于容纳槽54内。在第一箱体20包括第一端壁22和第一侧壁23的实施例中,第一侧壁23远离第一端壁22的一端插设于容纳槽54内。第一密封面21和第二密封面32之间密封胶40至少部分位于容纳槽54内。
在一些实施例中,如图18、图19所示,容纳槽54对应位置的第二端壁33的厚度小于第二端壁33在其他位置的厚度。这种容纳槽54可以是通过在第二端壁33上的部分区域进行削薄处理形成,或者通过浇筑、注塑等一体成型方式形成。
在另一些实施例中,如图19、图20所示,容纳槽54从第一表面31向远离第一端壁22的方向凹陷,第二端壁33背离第一表面31的表面在容纳槽54对应位置向远离第一端壁22的方向凸出,这样可以实现第二端壁33在容纳槽54对应位置的厚度和第二端壁33其他位置的厚度一致,以使第二端壁33具有较好的结构强度。这种容纳槽54可以是通过冲压形成、弯折等方式形成。
第一侧壁23插设于容纳槽54内,不仅能够对第一侧壁23起到限位作用,还能限制第一侧壁23向朝向封闭空间A变形方向或者向背离封闭空间A的方向变形,容纳槽54内填充有密封胶40,不仅能够提高密封性能,密封胶40还能在容纳槽54内连接第一箱体20和第二箱体30,则可以不需要设置其他连接件连接第一箱体20和第二箱体30,减少电池100组装的步骤和节约成本。
在挡胶结构50设置于第一表面31的实施例中,第二箱体30的第二侧壁34可以设置为低侧壁结构,即第二箱体30的第二侧壁34在第一方向X上的尺寸较小,能够减小第二侧壁34对第一方向X上的空间的占用。
如图22所示,在一些实施例中,沿第一方向X投影,容纳槽54的投影与电池单体10的投影至少部分重合。
沿第二方向Y,电池单体10的至少部分延伸至容纳槽54的槽口。在两个容纳槽54设置于第二端壁33沿第二方向Y相对布置的两端的实施例中,电池单体10沿第二方向Y延伸至容纳槽54的槽口,第一方向X投影,电池单体10的投影的一部分位于容纳槽54内。
沿第一方向X投影,容纳槽54的投影与电池单体10的投影至少部分重合,则电池单体10可以充分利用封闭空间A,以使提高电池单体10的能量密度。电池单体10还能够起到阻挡容纳槽54内的密封胶40溢进封闭空间A的作用。
如图2所示,在一些实施例中,第一箱体20还包括两个第三侧壁24,两个第三侧壁24分别连接于第一端壁22沿第三方向Z的两端,两个第一侧壁23和两个第三侧壁24共同形成第一箱体20的箱侧壁,从而使得第一箱体20为一侧开口形成有容纳电池单体10的容纳腔的空心结构。
在一些实施例中,第二箱体30还包括两个第四侧壁35,两个第四侧壁35分别连接于第二端壁33沿第三方向Z的两端,两个第四侧壁35和两个第二侧壁34共同形成第二箱体30的箱侧壁,从而使得第二箱体30为一侧开口形成有容纳电池单体10的容纳腔的空心结构。
第三方向Z、第二方向Y和第一方向X两两垂直。第三方向Z可以是电池100的长度方向,当电池100用于重卡时,第三方向Z可以与重卡的长度方向基本一致。
第三侧壁24和第二侧壁34一一对应设置,第三侧壁24位于第四侧壁35的内侧。
第三侧壁24设置有第三密封面(图中未示出),第四侧壁35设置有第四密封面(图中未示出),第三密封面和第四密封面配合密封封闭空间A。第三密封面可以和第一表面31相交,第四密封面可以与第一表面31相交,以使减小第三密封面和第四密封面对第三方向Z空间的占用。第三密封面和第四密封面之间也可以形成容纳密封胶40的密封空间,密封胶40能够粘接第三密封面和第四密封面,从而实现第一箱体20和第二箱体30连接,则可以不需要在第三密封面和第四密封面对应位置设置其他连接件连接第一箱体20和第二箱体30,有利于简化电池100的组装步骤和节约成本。
当然,第三密封面和第四密封面也可以平行第一表面31。
如图23所示,第一箱体20可以是板状结构,第二箱体30为一侧开口以形成容纳电池单体10的容纳腔的空心结构。第一箱体20沿第二方向Y分别与两个第二侧壁34相对两个端面分别形成第一密封面21。第一密封面21和第二密封面32之间可以形成设置密封胶40的容胶空间B。第一箱体20背离第一表面31的表面与第二侧壁34背离第二端壁33的端面可以共面。
如图24所示,第二箱体30可以是板状结构,第一箱体20为一侧开口以形成容纳电池单体10的容纳腔的空心结构。第二箱体30沿第二方向Y分别与两个第一侧壁23相对两个端面分别形成第二密封面32。第一密封面21和第二密封面32之间可以形成设置密封胶40的容胶空间B。第二箱体30背离第一表面31的表面与第一侧壁23背离第一端壁22的端面可以共面。
本申请实施例还提供一种用电设备,用电设备包括上述任意实施例提供的电池100。
用电装置采用上述提供的具有较高能量密度的电池100,故具有较长的续航能力,满足更多的用电需求。
本申请实施例提供了一种电池100,电池100包括电池单体10、第一箱体20和第二箱体30。电池单体10容纳于第一箱体20和第二箱体30限定出的封闭空间A内。第一箱体20包括第一端壁22和第一侧壁23,第一端壁22沿第二方向Y的两端均连接有第一侧壁23,两个第一侧壁23均与第一端壁22呈钝角布置,两个第一侧壁23呈八字布置。第二箱体30包括第二端壁33和第二侧壁34,第二端壁33和第一端壁22沿第一方向X相对布置,第二端壁33沿第二方向Y的两端均连接有第二侧壁34,两个第二侧壁34均与第二端壁33垂直布置。两个第二侧壁34沿第一方向X的尺寸大于第一侧壁23沿第一方向X的尺寸,第二箱体30为高侧壁结构。第一侧壁23位于第二侧壁34靠近封闭空间A的一侧,第一侧壁23远离封闭空间A的表面的一部分形成第一密封面21,第二侧壁34靠近封闭空间A的表面的一部分形成第二密封面32,第一密封面21和第二密封面32之间形成容纳有密封胶40的容纳空间。第二端壁33面向封闭空间A的表面为第一表面31,第一表面31承载电池单体10。两个第二侧壁34的第一内表面均凸设有第一凸起51,第一箱体20的两个第一侧壁23远离第一端壁22的一端分别支撑于两个第一凸起51背离第二端壁33的第一抵靠面511。或者两个第二侧壁34的第一内表面均设有凹槽52,凹槽52延伸至第二侧壁34远离第二端壁33的一端。第一箱体20的两个第一侧壁23远离第一端壁22的一端分别插设于两个凹槽52内并与凹槽52的槽壁面抵靠。
本申请实施例提供了一种电池100,电池100包括电池单体10、第一箱体20和第二箱体30。电池单体10容纳于第一箱体20和第二箱体30限定出的封闭空间A内。第一箱体20包括第一端壁22和第一侧壁23,第一端壁22沿第二方向Y的两端均连接有第一侧壁23,两个第一侧壁23均与第一端壁22垂直布置。第二箱体30包括第二端壁33和第二侧壁34,第二端壁33和第一端壁22沿第一方向X相对布置,第二端壁33沿第二方向Y的两端均连接有第二侧壁34,两个第二侧壁34均与第二端壁33垂直布置。两个第二侧壁34沿第一方向X的尺寸小于第一侧壁23沿第一方向X的尺寸,第二箱体30为低侧壁结构。第一侧壁23位于第二侧壁34靠近封闭空间A的一侧,第一侧壁23远离封闭空间A的表面的一部分形成第一密封面21,第二侧壁34靠近封闭空间A的表面的一部分形成第二密封面32,第一密封面21和第二密封面32之间形成容纳有密封胶40的容纳空间。第二端壁33面向封闭空间A的表面为第一表面31,第一表面31承载电池单体10。第一表面31凸设有两个第二凸起53,两个第二凸起53沿第二方向Y间隔布置,第二凸起53为挡胶结构50。第一箱体20的两个第一侧壁23远离第一端壁22的一端分别插设于两个第二凸起53和两个第二侧壁34之间。
以上仅为本申请的优选实施例而已,并不用于限制本申请,对于本领域的技术人员来说,本申请可以有各种更改和变化。凡在本申请的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。

Claims (25)

  1. 一种电池,包括:
    电池单体;
    第一箱体,包括第一密封面;
    第二箱体,所述第二箱体包括第一表面和第二密封面,所述第一表面用于承载所述电池单体;
    所述第一箱体与所述第二箱体共同围合形成容纳所述电池单体的封闭空间,所述第一密封面与所述第二密封面配合以用于密封所述封闭空间;
    所述第一密封面与所述第一表面相交,所述第二密封面与所述第一表面相交。
  2. 根据权利要求1所述的电池,其中,所述第一密封面和所述第二密封面中的至少一者与所述第一表面垂直。
  3. 根据权利要求1或2所述的电池,其中,所述第一密封面和所述第二密封面中的一者与所述第一表面垂直,所述第一密封面和所述第二密封面中的另一者与所述第一表面非垂直且相交。
  4. 根据权利要求3所述的电池,其中,所述第一密封面和所述第二密封面中与所述第一表面相互垂直的一者位于另一者远离所述封闭空间的一侧。
  5. 根据权利要求4所述的电池,其中,所述第二密封面垂直所述第一表面,所述第二密封面位于所述第一密封面远离所述封闭空间的一侧。
  6. 根据权利要求3-5任一项所述的电池,其中,所述第一箱体包括相互连接的第一端壁和第一侧壁,所述第一密封面设置于所述第一侧壁;
    所述第二箱体包括相互连接的第二端壁和第二侧壁,所述第二端壁具有所述第一表面且与所述第一端壁沿第一方向相对设置,所述第一方向垂直于所述第一表面,所述第二密封面设置于所述第二侧壁。
  7. 根据权利要求6所述的电池,其中,所述第一密封面与所述第一表面非垂直且相交,所述第一侧壁和所述第一端壁呈钝角连接;或者,所述第二密封面与所述第一表面非垂直且相交,所述第二侧壁和所述第二端壁呈钝角连接。
  8. 根据权利要求7所述的电池,其中,所述第一密封面和所述第二密封面共同形成用于容纳密封胶的容胶空间。
  9. 根据权利要求8所述的电池,其中,沿所述第一方向投影,所述容胶空间的投影与所述电池单体的投影至少部分重合。
  10. 根据权利要求8所述的电池,其中,所述电池还包括挡胶结构,所述挡胶结构设置于所述封闭空间与所述容胶空间的相接处。
  11. 根据权利要求10所述的电池,其中,所述挡胶结构设置于所述第二侧壁。
  12. 根据权利要求11所述的电池,其中,所述挡胶结构为凸设于所述第二侧壁的内表面的第一凸起,所述第一箱体支撑于所述第一凸起。
  13. 根据权利要求11所述的电池,其中,所述挡胶结构为设置于所述第二侧壁的内表面的凹槽,所述第一箱体的部分位于所述凹槽内。
  14. 根据权利要求6所述的电池,其中,所述第二侧壁自所述第二端壁的端部沿所述第一方向朝远离所述电池单体的一侧弯折形成凹部,所述第一侧壁插入所述凹部中;或者,所述第一侧壁自所述第一端壁的端部沿所述第一方向朝远离所述电池单体的一侧弯折形成凹部,所述第二侧壁插入所述凹部中;
    所述凹部用于容纳密封胶。
  15. 根据权利要求14所述的电池,其中,沿所述第一方向投影,所述凹部的投影与所述电池单体的投影至少部分重合。
  16. 根据权利要求1或2所述的电池,其中,所述第一密封面和所述第二密封面均与所述第一表面垂直。
  17. 根据权利要求16所述的电池,其中,所述第一箱体包括相互连接的第一端壁和第一侧壁,所述第一密封面设置于所述第一侧壁;
    所述第二箱体包括相互连接的第二端壁和第二侧壁,所述第二端壁具有所述第一表面且与所述第一端壁沿第一方向相对设置,所述第一方向垂直于所述第一表面,所述第二密封面设置于所述第二侧壁。
  18. 根据权利要求17所述的电池,其中,所述第一密封面和所述第二密封面之间填充有密封胶。
  19. 根据权利要求18所述的电池,其中,沿第二方向投影,所述密封胶的投影与所述电池单体的投影至少部分重合,所述第二方向平行于所述第一表面且与所述第一侧壁相交。
  20. 根据权利要求18所述的电池,其中,所述电池还包括挡胶结构,所述挡胶结构设置于所述封闭空间靠近所述第一密封面和所述第二密封面的位置。
  21. 根据权利要求20所述的电池,其中,所述挡胶结构设置于所述第一表面。
  22. 根据权利要求20所述的电池,其中,所述挡胶结构为凸设于所述第一表面的第二凸起,所述第一箱体的部分位于所述第二侧壁和所述第二凸起之间。
  23. 根据权利要求1或2所述的电池,其中,所述第一箱体包括相互连接的第一端壁和第一侧壁,所述第一密封面设置于所述第一侧壁,所述第二箱体包括第二端壁,所述第一端壁和所述第二端壁在第一方向上相对布置,所述第一方向垂直所述第一表面;
    所述第二端壁设置有容纳槽,所述第二密封面设置于所述容纳槽的槽壁上,所述第一侧壁插入所述容纳槽,并且,所述容纳槽内填充有密封胶。
  24. 根据权利要求23所述的电池,其中,沿所述第一方向投影,所述容纳槽的投影与所述电池单体的投影至少部分重合。
  25. 一种用电设备,包括根据权利要求1-24中任一项所述的电池。
PCT/CN2024/086662 2023-08-15 2024-04-08 电池及用电设备 Pending WO2025035797A1 (zh)

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