WO2025035797A1 - 电池及用电设备 - Google Patents
电池及用电设备 Download PDFInfo
- 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
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- 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
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; 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
- H01M50/24—Mountings; 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present application relates to the field of battery technology, and in particular to a battery and 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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Abstract
Description
Claims (25)
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
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| CN216389596U (zh) * | 2021-10-25 | 2022-04-26 | 宁德时代新能源科技股份有限公司 | 一种电池包箱体、电池、用电装置及储电柜 |
| CN216850135U (zh) * | 2021-10-29 | 2022-06-28 | 宁德时代新能源科技股份有限公司 | 电池箱、电池及用电装置 |
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| CN219203382U (zh) * | 2022-12-30 | 2023-06-16 | 宁德时代新能源科技股份有限公司 | 电池和用电装置 |
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| KR20220126931A (ko) * | 2021-03-10 | 2022-09-19 | 에스케이온 주식회사 | 배터리 셀 |
| CN216389596U (zh) * | 2021-10-25 | 2022-04-26 | 宁德时代新能源科技股份有限公司 | 一种电池包箱体、电池、用电装置及储电柜 |
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