Battery and electric device

Abstract

Provided in the present application are a battery and an electric device. The battery comprises battery cells, a first box and a second box, wherein the first box comprises a first sealing surface; the second box comprises a first surface and a second sealing surface, the first surface being used for bearing the battery cells; the first box and the second box jointly define a sealed space for accommodating the battery cells, the first sealing surface being fitted with the second sealing surface in order to seal the sealed space; and the first sealing surface intersects the first surface, and the second sealing surface intersects the first surface. Thus, in a direction which is parallel to the first surface and intersects the first sealing surface and the second sealing surface, the space occupied by the first sealing surface and the second sealing surface can be reduced, leading to an increase in the space utilization rate of the battery in the direction that is parallel to the first surface and intersects both the first sealing surface and the second sealing surface, enabling more battery cells to be accommodated or the volume of the battery to be reduced, thereby improving the volume energy density of the battery.

Description

Batteries and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311027215.8, filed on August 15, 2023, entitled “Batteries and Electrical Equipment,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0004] Batteries are widely used in electronic devices, vehicles, power tools, drones, energy storage devices, and other fields. As application environments and conditions become increasingly complex, higher requirements are placed on the energy density of batteries.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a battery and an electrical device to improve the energy density of the battery.

[0007] In a first aspect, 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 and the second sealing surface cooperating to seal the closed space; the first sealing surface intersects with the first surface, and the second sealing surface intersects with the first surface.

[0008] In the above technical solution, the first sealing surface and the second sealing surface both 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. Under the same sealing width, relative to the case where the first sealing surface and the second sealing surface are 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.

[0009] In some embodiments of the first aspect of the present application, at least one of the first sealing surface and the second sealing surface is perpendicular to the first surface.

[0010] In the above technical solution, 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 that is perpendicular to the first surface in a direction parallel to the first surface and intersecting with the first sealing surface and the second sealing surface, so that the one of the first sealing surface and the second sealing surface that is perpendicular to the first surface fully utilizes the space in the direction perpendicular to the first surface, which is beneficial to improving the volume energy density of the battery.

[0011] In some embodiments of the first aspect of the present application, 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 the first surface.

[0012] In the above technical solution, 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 not only reduces 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 makes full use of the space in the direction perpendicular to the first surface, further improving the volume energy density of the battery.

[0013] In some embodiments of the first aspect of the present application, 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.

[0014] In the above technical solution, 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 enclosed 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 enclosed 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 size of the battery, and help to improve the volume energy density of the battery.

[0015] In some embodiments of the first aspect of the present application, 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.

[0016] In the above technical solution, the second sealing surface is perpendicular to the first surface and is located on the side of the first sealing surface away from the enclosed space. This 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.

[0017] In some embodiments of the first aspect of the present application, 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.

[0018] In the above technical solution, 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. On the one hand, it is convenient to enable the first box body and the second box body to enclose a closed space for accommodating battery cells. On the other hand, the first sealing surface is arranged on the first side wall, and the second sealing surface is arranged on the second side wall, which can make the area of ​​the first sealing surface and the second sealing surface larger, so as to form a good connection relationship and good sealing with the second sealing surface, so that the battery has higher reliability, and also makes the structure of the first box body and the second box body simple and easy to manufacture.

[0019] In some embodiments of the first aspect of the present application, 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.

[0020] In the above technical solution, 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 filling the space between the first sealing surface and the second sealing surface with sealant or setting a sealing gasket, thereby facilitating a reliable sealing relationship between the first and second boxes. 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 filling the space between the first sealing surface and the second sealing surface with sealant or setting a sealing gasket, thereby facilitating a reliable sealing relationship between the first and second boxes.

[0021] In some embodiments of the first aspect of the present application, the first sealing surface and the second sealing surface jointly form a sealant containing space for accommodating sealant.

[0022] In the above technical solution, the first sealing surface and the second sealing surface jointly form a glue-containing space for accommodating sealant. By arranging sealant in the glue-containing 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.

[0023] In some embodiments of the first aspect of the present application, projected along the first direction, a projection of the adhesive holding space at least partially overlaps with a projection of the battery cell.

[0024] In the above technical solution, when projected along the first direction, the projection of the glue holding space and the projection of the battery cell at least partially overlap, so 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.

[0025] In some embodiments of the first aspect of the present application, 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.

[0026] In the above technical solution, 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 provided 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 making the battery have better sealing performance, which is beneficial to improving the sealing reliability of the battery.

[0027] In some embodiments of the first aspect of the present application, the glue blocking structure is provided on the second side wall.

[0028] In the above technical solution, the glue blocking structure is arranged on the second side wall, thereby reducing the risk of interference between the glue blocking structure and the battery cell.

[0029] In some embodiments of the first aspect of the present application, the glue blocking structure is a first protrusion protruding from the inner surface of the second side wall, and the first box body is supported by the first protrusion.

[0030] In the above technical solution, 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 toward the second box body, so that the closed space can maintain a larger size.

[0031] In some embodiments of the first aspect of the present application, the glue-blocking structure is a groove provided on the inner surface of the second side wall, and a portion of the first box body is located in the groove.

[0032] In the above technical solution, 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.

[0033] In some embodiments of the first aspect of the present application, 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.

[0034] In the above technical solution, 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. 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.

[0035] In some embodiments of the first aspect of the present application, projected along the first direction, a projection of the recess at least partially overlaps with a projection of the battery cell.

[0036] In the above technical solution, the projection of the recess at least partially overlaps with the projection of the battery cell when projected along the first direction. This allows the battery cell to fully utilize the enclosed space, thereby increasing the energy density of the battery cell. The battery cell also prevents the sealant in the recess from overflowing into the enclosed space.

[0037] In some embodiments of the first aspect of the present application, both the first sealing surface and the second sealing surface are perpendicular to the first surface.

[0038] In the above technical solution, the first sealing surface and the second sealing surface are both perpendicular to the first surface. Compared with the situation where the first sealing surface and the second sealing surface are parallel to the first surface, the first sealing surface and the second sealing surface are both perpendicular to the first surface, which can make the first sealing surface and the second sealing surface occupy the least space in the direction parallel to the first surface and intersecting with the first sealing surface and the second sealing surface, 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.

[0039] In some embodiments of the first aspect of the present application, 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.

[0040] In the above technical solution, 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. On the one hand, it is convenient to enable the first box body and the second box body to form a closed space for accommodating battery cells. On the other hand, the first sealing surface is arranged on the first side wall, and the second sealing surface is arranged on the second side wall, which can make the area of ​​the first sealing surface and the second sealing surface 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 also makes the structure of the first box body and the second box body simple and easy to manufacture.

[0041] In some embodiments of the first aspect of the present application, a sealant is filled between the first sealing surface and the second sealing surface.

[0042] In the above technical solution, sealant is filled between the first sealing surface and the second sealing surface, which not only improves the sealing performance of the enclosed space, but also improves 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. The sealing surface and the second sealing surface are bonded by the sealant, so 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.

[0043] In some embodiments of the first aspect of the present application, projected along a second direction, 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 sidewall.

[0044] In the above technical solution, when projected along the second direction, the projection of the sealant and the projection of the battery cell at least partially overlap, 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.

[0045] In some embodiments of the first aspect of the present application, 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.

[0046] In the above technical solution, a glue blocking structure is set in the closed space near the first sealing surface and the second sealing surface. The glue blocking structure can limit the sealant set in the glue holding space from overflowing into the closed space, reducing the waste of sealant, and also making the battery have better sealing performance, which is beneficial to improving the sealing reliability of the battery.

[0047] In some embodiments of the first aspect of the present application, the glue blocking structure is disposed on the first surface.

[0048] In the above technical solution, the glue blocking structure is arranged on the first surface, which facilitates the arrangement of the glue blocking structure.

[0049] In some embodiments of the first aspect of the present application, the glue blocking structure is a second protrusion protruding from the first surface, and a portion of the first box body is located between the second side wall and the second protrusion.

[0050] In the above technical solution, 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, reducing 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.

[0051] In some embodiments of the first aspect of the application, 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.

[0052] In the above technical solution, the first side wall is inserted into the accommodating groove, which not only limits the first side wall, but also limits the deformation of the first side wall toward the enclosed space or away from the enclosed space. The accommodating groove is filled with sealant, which not only improves 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.

[0053] In some embodiments of the first aspect of the present application, projected along the first direction, a projection of the accommodating groove at least partially overlaps with a projection of the battery cell.

[0054] In the above technical solution, the projection of the receiving groove and the projection of the battery cell, when projected along the first direction, at least partially overlap, so that the battery cell can fully utilize the enclosed space, thereby improving the energy density of the battery cell. The battery cell also serves to prevent the sealant in the receiving groove from overflowing into the enclosed space.

[0055] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery provided in any of the above embodiments.

[0056] In the above technical solution, the electrical device adopts the battery with higher energy density provided above, so it has longer endurance and can meet more electricity needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0058] FIG1 is a schematic diagram of a vehicle provided in some embodiments of the present application;

[0059] FIG2 is an exploded view of a battery provided in some embodiments of the present application;

[0060] 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;

[0061] FIG4 is a schematic diagram of a sealant filled between the first sealing surface and the second sealing surface in FIG3 ;

[0062] 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;

[0063] FIG6 is a schematic diagram of the sealant filled between the first sealing surface and the second sealing surface in FIG5 ;

[0064] 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;

[0065] FIG8 is a schematic diagram of the sealant filled between the first sealing surface and the second sealing surface in FIG7 ;

[0066] FIG9 is a cross-sectional view of a battery provided in some embodiments of the present application;

[0067] FIG10 is a cross-sectional view of batteries provided in some other embodiments of the present application;

[0068] 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;

[0069] FIG12 is a cross-sectional view of batteries provided in yet other embodiments of the present application;

[0070] FIG13 is an enlarged view of point D1 in FIG11 ;

[0071] FIG14 is a cross-sectional view of batteries provided in some other embodiments of the present application;

[0072] FIG15 is an enlarged view of point D2 in FIG14 ;

[0073] FIG16 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;

[0074] FIG17 is a schematic diagram of a sealant filled between the first sealing surface and the second sealing surface in FIG16;

[0075] FIG18 is a schematic diagram of the first box and the second box after being covered, provided in still other embodiments;

[0076] FIG19 is a schematic diagram of a sealant filled between the first sealing surface and the second sealing surface in FIG18;

[0077] FIG20 is a schematic diagram of the first box and the second box after being covered, provided in yet other embodiments;

[0078] FIG21 is a schematic diagram of a sealant filled between the first sealing surface and the second sealing surface in FIG20;

[0079] FIG22 is a cross-sectional view of a battery provided in some further embodiments of the present application;

[0080] FIG23 is a schematic diagram of the first box and the second box after being covered, provided in still other embodiments;

[0081] FIG24 is a schematic diagram of the first box body and the second box body after being covered, provided in yet other embodiments.

[0082] Icon: 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. DETAILED DESCRIPTION

[0083] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0084] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0085] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0086] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0087] In the description of the embodiments of the present application, it should be noted that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are merely for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present application. In addition, the terms "first," "second," "third," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0088] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0089] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a casing for enclosing one or more battery cells. The casing can reduce the risk of liquids or other foreign matter affecting the charging or discharging of the battery cells.

[0090] The term "plurality" used in this application refers to two or more (including two).

[0091] In the embodiment of the present application, 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.

[0092] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0093] A battery cell may include an electrode assembly. The electrode assembly may include a positive electrode, a negative electrode, and a separator. During the charge and discharge process of a battery cell, active ions (e.g., lithium ions) are intercalated and released between the positive and negative electrodes. A separator, positioned between the positive and negative electrodes, reduces the risk of a short circuit between the positive and negative electrodes while allowing the active ions to pass through.

[0094] In some embodiments, 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. Liquid electrolytes may include an electrolyte salt and a solvent. Solid electrolytes may include polymer solid electrolytes, inorganic solid electrolytes, or composite solid electrolytes.

[0095] In some embodiments, the electrode assembly may be a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0096] In some embodiments, the electrode assembly may be cylindrical in shape.

[0097] In some embodiments, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0098] In some embodiments, a 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 (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0099] As an example, the battery cells may be cylindrical battery cells, prismatic battery cells, pouch battery cells, or battery cells of other shapes.

[0100] 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.

[0101] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0102] In some embodiments, the battery may be a battery pack, which includes a housing and battery cells, with the battery cells or battery modules housed within the housing. The housing may include a first housing and a second housing, which are connected to form a closed space. The second housing has a first surface for supporting the battery cells, which are disposed within the closed space to reduce the risk of liquids or other foreign matter affecting the charging or discharging of the battery cells.

[0103] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, 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.

[0104] In some embodiments, the battery may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0105] The battery case includes a first case and a second case, which are interlocked to form a closed space for accommodating battery cells. The first case and the second case are connected by a seal to seal the closed space. In the related art, the edges of the first case and the second case are both provided with a flange structure 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. 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.

[0106] Based on the above considerations, in order to improve the problem that the flange structure occupies additional space due to sealing achieved by forming a flange structure on the edges of the first box body and the second box body, resulting in low battery space utilization and affecting the battery energy density, an embodiment of the present application provides a battery, the battery including 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 and the second sealing surface cooperate to seal the closed space; the first sealing surface intersects with the first surface, and the second sealing surface intersects with the first surface.

[0107] 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. Under the same sealing width, relative to the case where the first sealing surface and the second sealing surface are 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.

[0108] The battery disclosed in the embodiments of the present application can be used in, but is not limited to, a battery cabinet, a container-type energy storage device, etc. The energy storage device can include multiple batteries disclosed in the present application.

[0109] The battery disclosed in the embodiments of the present application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. The battery disclosed in the present application can be used to form a power supply system for the electrical equipment.

[0110] The embodiments of the present application provide an electrical device using a battery as a power source. The electrical 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, such as 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.

[0111] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0112] Please refer to Figure 1, which is a schematic diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The type of the vehicle 1000 can 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 1000 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, 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.

[0113] The vehicle 1000 may further include a controller 200 and a motor 300 . 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 the vehicle 1000 during startup, navigation, and driving.

[0114] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also 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.

[0115] As shown in Figures 2, 3, and 4, 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.

[0116] The first housing 20 and the second housing 30 together form the housing of the battery 100. The battery cells 10 are housed within the enclosed space A defined by the first housing 20 and the second housing 30. The battery 100 may include one or more battery cells 10. In embodiments where the battery 100 includes multiple battery cells 10, the multiple battery cells 10 may be connected in series, in parallel, or in a hybrid configuration. Hybrid configuration refers to the configuration of multiple battery cells 10 being connected both in series and in parallel.

[0117] The second case 30 has a first surface 31 for supporting the battery cells 10. The first surface 31 for supporting the battery cells 10 can be understood as the first surface 31 being the surface of the second case 30 for placing the battery cells 10 or the first surface 31 being the surface of the second case 30 for bearing the main weight of the battery cells 10. The second case 30 can be considered the main part for supporting the battery cells 10. For example, the second case 30 can serve as the lower case of the battery 100, and the surface of the bottom wall of the lower case facing the battery cells 10 can be the first surface 31. The first case 20 can be considered the upper case of the battery 100. The first case 20 and the second case 30 overlap each other in the first direction X to define an enclosed space A.

[0118] In some embodiments, 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.

[0119] In some embodiments, 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 lower density, such as plastic, so that the mass of the first box body 20 does not affect the mass energy density of the battery 100 as much as possible, which is also beneficial to reducing the weight of the battery 100.

[0120] The first housing 20 and the second housing 30 are used to provide an enclosed space A for the battery cells 10. In some embodiments, the first housing 20 and the second housing 30 cover each other to define the enclosed space A for accommodating the battery cells 10. Of course, the connection between the first housing 20 and the second housing 30 can be sealed by a sealing member (not shown), which can be a sealing ring, a sealing gasket, a sealant 40, etc.

[0121] The first housing 20 and the second housing 30 can have various shapes, such as a rectangular parallelepiped, a cylinder, etc. The first housing 20 can be a hollow structure with an opening on one side forming a cavity for accommodating the battery cells 10. The second housing 30 can also be a hollow structure with an opening on one side forming a cavity for accommodating the battery cells 10. The open side of the first housing 20 covers the open side of the second housing 30, thereby forming a housing with an enclosed space A. Of course, the first housing 20 can also be a hollow structure with an opening on one side forming a cavity for accommodating the battery cells 10, and the second housing 30 can be a plate-shaped structure. The second housing 30 covers the open side of the first housing 20, thereby forming a housing with an enclosed space A. Of course, the second housing 30 can also be a hollow structure with an opening on one side forming a cavity for accommodating the battery cells 10, and the first housing 20 can be a plate-shaped structure. The first housing 20 covers the open side of the second housing 30, thereby forming a housing with an enclosed space A.

[0122] The first sealing surface 21 is the surface of the first housing 20 used for sealing connection with the second housing 30. The second sealing surface 32 is the surface of the second housing 30 used to form a sealing interface with the first sealing surface 21 of the first housing 20 to seal the enclosed space A. The first sealing surface 21 and the second sealing surface 32 cooperate to seal the enclosed space A, thereby reducing the risk of external interference with the battery cells 10 within the enclosed space A, enabling the battery 100 to function normally and improving the reliability of the battery 100.

[0123] There are many ways to form a sealed connection between the first sealing surface 21 and the second sealing surface 32. For example, the 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, thereby achieving sealing; for another example, the first sealing surface 21 and the second sealing surface 32 are filled with sealant 40, and the sealant 40 bonds the first sealing surface 21 and the second sealing surface 32 to achieve sealing.

[0124] The phrase "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 directly intersect. It may also mean that an extension of the first sealing surface 21 intersects an extension of the first surface 31, or that the plane on which the first sealing surface 21 is located intersects the plane on which the first surface 31 is located. The first sealing surface 21 and the first surface 31 intersect. In other words, the first sealing surface 21 and the first surface 31 are not parallel. 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.

[0125] The phrase "the second sealing surface 32 intersects the first surface 31" does not simply mean that the second sealing surface 32 and the first surface 31 directly intersect. It can also mean that an extension of the second sealing surface 32 intersects an extension of the first surface 31, or that the plane on which the second sealing surface 32 lies intersects the plane on which the first surface 31 lies. The second sealing surface 32 and the first surface 31 intersect; in other words, the second sealing surface 32 and the first surface 31 are not parallel. The second sealing surface 32 and the first surface 31 can intersect perpendicularly or non-perpendicularly. Non-perpendicularly intersecting 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.

[0126] 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. Under the same sealing width, relative to the case where the first sealing surface 21 and the second sealing surface 32 are 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.

[0127] In some embodiments, at least one of the first sealing surface 21 and the second sealing surface 32 is perpendicular to the first surface 31 .

[0128] As shown in Figures 3-6, only one of the first sealing surface 21 and the second sealing surface 32 may intersect the first surface 31 perpendicularly, while the other may not intersect the first surface 31 perpendicularly. Alternatively, the first sealing surface 21 may intersect the first surface 31 perpendicularly, while the second sealing surface 32 may not intersect the first sealing surface 21 perpendicularly. Alternatively, the first sealing surface 21 may not intersect the first surface 31 perpendicularly, while the second sealing surface 32 may intersect the first surface 31 perpendicularly.

[0129] The first sealing surface 21 and the second sealing surface 32 may both perpendicularly intersect the first surface 31 .

[0130] 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.

[0131] As shown in FIG. 3-6 , in some embodiments, one of the first sealing surface 21 and the second sealing surface 32 is perpendicular to the first surface 31 , and the other of the first sealing surface 21 and the second sealing surface 32 is non-perpendicular to and intersects the first surface 31 .

[0132] In some embodiments, the 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.

[0133] In other embodiments, 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.

[0134] One of the 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 not only reduces 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 fully utilizes the space in the direction perpendicular to the first surface 31, further improving the volume energy density of the battery 100.

[0135] In an embodiment where one of the first sealing surface 21 and the second sealing surface 32 intersects the first surface 31 perpendicularly and the other does not intersect the first surface 31 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 the side of the other away from the enclosed space A.

[0136] If the first sealing surface 21 intersects the first surface 31 perpendicularly, and the second sealing surface 32 does not intersect the first surface 31 perpendicularly, the first sealing surface 21 is farther away from the closed space A than the second sealing surface 32 . Alternatively, the first sealing surface 21 may be located outside the second sealing surface 32 .

[0137] If the second sealing surface 32 intersects the first surface 31 perpendicularly, and the first sealing surface 21 does not intersect the first surface 31 perpendicularly, the second sealing surface 32 is further away from the closed space A than the first sealing surface 21 . Alternatively, the second sealing surface 32 may be located outside the first sealing surface 21 .

[0138] 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 fully utilize 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 improve the volume energy density of the battery 100.

[0139] In some embodiments, 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.

[0140] The second sealing surface 32 intersects the first surface 31 perpendicularly, and the second sealing surface 32 is non-perpendicular to the first surface 31 .

[0141] 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.

[0142] According to the different structures 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.

[0143] As shown in Figures 3 to 6, in some embodiments, 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.

[0144] The first side wall 23 is connected to an end portion of the first end wall 22 along the second direction Y. The first side wall 23 extends from the first end wall 22 toward the second box body 30 .

[0145] The second direction Y is 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. In some embodiments, the second direction Y may be the width direction of the battery 100. If 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. Alternatively, the first sealing surface 21 and the second sealing surface 32 both intersect with the width direction of the battery 100. Under the same sealing width, compared to the case where the first sealing surface 21 and the second sealing surface 32 are parallel to the first surface 31 (the first sealing surface 21 and the second sealing surface 32 are parallel to the second direction Y), the first sealing surface 21 and the second sealing surface 32 both intersect with the first surface 31. This 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, thereby accommodating more battery cells 10 or reducing the volume of the battery 100, thereby improving the volumetric energy density of the battery 100. The battery 100 has a smaller width, which can also help reduce the width of the electrical equipment powered by the battery 100. For example, if the electrical equipment is a heavy truck, the heavy truck can be made smaller in the width direction of the battery 100 when powered by the battery 100 provided in the embodiment of the application. Generally, the width of the battery 100 is substantially the same as that of the heavy truck, that is, the heavy truck can have a smaller width.

[0146] The first box 20 and the second box 30 can be considered to cover 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. In some embodiments, the height direction of the battery 100 can be substantially consistent with the height direction of the heavy truck.

[0147] The first end wall 22 and the first side wall 23 can be integrally formed. The first end wall 22 and the first side wall 23 can be provided separately 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.

[0148] 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.

[0149] 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 . The second side wall 34 extends from the second end wall 33 toward the first box body 20 .

[0150] The second end wall 33 and the second side wall 34 can be integrally formed. The second end wall 33 and the second side wall 34 can 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.

[0151] 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.

[0152] 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. On the one hand, it is convenient to enable the first box body 20 and the second box body 30 to enclose a closed space A for accommodating the battery cell 10. On the other hand, the first sealing surface 21 is provided on the first side wall 23, and the second sealing surface 32 is provided on the second side wall 34. The area of ​​the first sealing surface 21 and the second sealing surface 32 can be made 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.

[0153] As shown in Figures 3 to 6, in some embodiments, 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.

[0154] As shown in Figures 3 to 6, in some embodiments, 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.

[0155] As shown in Figures 3-6, 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. In the embodiment where the first housing 20 includes two first side walls 23, both 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" shape.

[0156] As shown in Figures 7 and 8, 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. In the embodiment where the second housing 30 includes two second side walls 34, both second side walls 34 are connected to the second end wall 33 at an obtuse angle, and the two second side walls 34 are arranged in an inverted "eight" shape.

[0157] 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. This facilitates filling the space between the first sealing surface 21 and the second sealing surface 32 with sealant 40 or installing a sealing gasket, thereby facilitating a reliable seal between the first and second housings 20 and 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. This facilitates filling the space between the first and second sealing surfaces 21 and 32 with sealant 40 or installing a sealing gasket, thereby facilitating a reliable seal between the first and second housings 20 and 30.

[0158] As shown in Figures 3 to 6, in an embodiment in which the first end wall 22 and the first side wall 23 are arranged at an obtuse angle, the second end wall 33 and the second side wall 34 can be arranged perpendicularly. The second side wall 34 is located on the outside of the first side wall 23, that is, the second side wall 34 is located on the side of the first side wall 23 facing 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 facing 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.

[0159] As shown in FIG. 3 to FIG. 8 , in some embodiments, the first sealing surface 21 and the second sealing surface 32 together form a sealant space B for accommodating the sealant 40 .

[0160] In an embodiment where the first side wall 23 and the first end wall 22 are arranged at an obtuse angle and the second side wall 34 and the second end wall 33 are arranged vertically, the cross-section of the glue-containing 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-containing space B away from the second end wall 33, so as to facilitate the filling of the glue-containing space B into the glue-containing space B.

[0161] 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 provide leakage prevention, waterproofing, vibration prevention, and heat insulation within 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 neoprene sealant 40, a PVC sealant 40, an asphalt sealant 40, or the like.

[0162] The first sealing surface 21 and the second sealing surface 32 together form a glue-containing space B for accommodating the sealant 40. By arranging the sealant 40 in the glue-containing space B, not only the sealing performance of the closed space A can be improved, but also the first sealing surface 21 and the second sealing surface 32 can be bonded by the sealant 40, thereby improving the connection stability of the first box body 20 and the second box body 30. Since the sealant 40 is bonded to the first sealing surface 21 and the second sealing surface 32, 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.

[0163] In other embodiments, the space formed between the first sealing surface 21 and the second sealing surface 32 can also be used to accommodate a sealing member such as a gasket or a sealing ring (not shown). 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 in contact or bonded contact, and the sealing member and the second sealing surface 32 can be in contact or bonded contact.

[0164] As shown in FIG. 9 and FIG. 10 , in some embodiments, when projected along the first direction X, the projection of the adhesive holding space B at least partially overlaps with the projection of the battery cell 10 .

[0165] In an embodiment where the first side wall 23 and the first end wall 22 are arranged at an obtuse angle and the second side wall 34 and the second end wall 33 are perpendicular, at least a portion of the adhesive space B can extend to the side of the battery cell 10 facing 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 facing away from the first surface 31 at least partially overlaps with the projection of the battery cell 10.

[0166] The adhesive space B may partially extend to the side of the battery cell 10 away from the first surface 31 , or the adhesive space B may be entirely located on the side of the battery cell 10 away from the first surface 31 .

[0167] Projected along the first direction X, 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. While occupying as little space as possible in the direction parallel to the first surface 31, the glue holding space B has a larger sealing area to improve the sealing between the first sealing surface 21 and the second sealing surface 32, so that the battery 100 has higher reliability.

[0168] As shown in FIG. 3 to FIG. 6 , in some embodiments, the battery 100 further includes a glue blocking structure 50 , which is disposed at the junction of the closed space A and the glue containing space B.

[0169] 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.

[0170] 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.

[0171] A glue blocking structure 50 is provided at the junction of the closed space A and the glue holding space B. The glue blocking structure 50 can limit the sealant 40 set in the glue holding space B from overflowing into the closed space A, reducing the waste of the sealant 40, and also making the battery 100 have better sealing performance, which is beneficial to improving the sealing reliability of the battery 100.

[0172] As shown in FIG. 3 to FIG. 6 , in an embodiment where the first end wall 22 and the first side wall 23 are arranged at an obtuse angle and the second end wall 33 and the second side wall 34 are perpendicular, the glue blocking structure 50 is disposed on the second side wall 34 .

[0173] The rubber blocking structure 50 provided on the second side wall 34 can support the first box body 20 along the direction of gravity and limit the movement of the first box body 20 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.

[0174] 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 .

[0175] As shown in FIG. 3 and FIG. 4 , 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 .

[0176] The inner surface of the second sidewall 34 is the surface of the second sidewall 34 facing the enclosed space A. The glue blocking structure 50 is a first protrusion 51 provided on the inner surface of the second sidewall 34. The first protrusion 51 protrudes from the first inner surface along the second direction Y and extends into the enclosed space A.

[0177] 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 provided separately, and then the first protrusion 51 is connected to the second side wall 34. There are many ways to connect the first protrusion 51 and the second side wall 34, such as welding, adhesive connection, screw connection, etc.

[0178] Along the first direction X, the first protrusion 51 has a first abutting surface 511 located on a side facing away from the second end wall 33. The end of the first side wall 23 facing away from the first end wall 22 abuts against the first abutting surface 511. In the embodiment where the second housing 30 includes two second side walls 34, the first inner surfaces of both second side walls 34 are each provided with a first protrusion 51, and the ends of the two first side walls 23 of the first housing 20 facing away from the first end wall 22 abut 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 housing 20 facing away from the first end wall 22 can be at the same height in the first direction X.

[0179] The first protrusion 51 not only blocks the sealant 40 in the sealant space B from entering the closed space A, but also limits 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 .

[0180] Therefore, 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.

[0181] In some embodiments, along the first direction X, the distance between the first abutting surface 511 and the end of the second side wall 34 facing away from the second end wall 33 is less than the distance between the first abutting surface 511 and the first surface 31. In this way, the first box body 20 can be closer to the end of the second side wall 34 facing away from the second end wall 33, thereby facilitating the assembly of the first box body 20 and the second box body 30. In this way, the second side wall 34 of the second box body 30 is relatively high along the first direction X, and the second box body 30 can be a high-wall structure, which can also be called a high-standing wall structure. The size of the first side wall 23 of the first box body 20 can be set to be smaller, thereby facilitating the assembly of the first box body 20 and the second box body 30.

[0182] As shown in Figures 3 and 4, in some embodiments, a gap can be formed between the end of the first protrusion 51 facing the second end wall 33 and 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.

[0183] As shown in Figure 11, in other embodiments, 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 separated from the second side wall 34 due to the weight of the first box body 20.

[0184] As shown in FIG. 5 and FIG. 6 , in other embodiments, the glue-blocking structure 50 is a groove 52 provided 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 .

[0185] The glue-blocking structure 50 may be a groove 52 provided on the first inner surface. At least a portion of the first box body 20 is inserted into the groove 52 , and the groove wall surface of the groove 52 supports the first box body 20 .

[0186] In the embodiment where the first box body 20 includes the first end wall 22 and the first side wall 23 , the first side wall 23 can be inserted into the groove 52 , and the groove wall surface of the groove 52 abuts against the end of the first side wall 23 away from the first end wall 22 .

[0187] In some embodiments, the groove 52 can extend along the first direction X to the end surface of the second sidewall 34 away from the second end wall 33, thereby forming an L-shaped groove 52 on the second sidewall 34. The groove sidewalls and groove bottom surface of the groove 52 can both abut against the end of the first sidewall 23 away from the first end wall 22. The surface of the groove 52 facing the second sealing surface can both abut against the first sidewall 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, and the groove bottom surface of the groove 52 can be the groove wall surface of the groove 52 intersecting the first direction X.

[0188] In the embodiment where the second housing 30 includes two second side walls 34, a groove 52 is provided on the first inner surface of each of the two second side walls 34. The ends of the two first side walls 23 of the first housing 20, which are away from the first end wall 22, respectively abut against the groove walls of the two grooves 52. The 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 housing 20, which are away from the first end wall 22, can be at the same height in the first direction X.

[0189] The groove 52 not only blocks the sealant 40 in the glue-containing 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.

[0190] The glue blocking structure 50 is a groove 52 set on the inner surface of the second side wall 34. It can not only prevent the sealant 40 in the glue containing space B from overflowing into the closed space A, but also reduce the weight of the second box body 30. Such a glue blocking structure 50 will not interfere with the structure in the closed space A.

[0191] In some embodiments, along the first direction X, the distance between the bottom surface of the groove 52 and the end of the second side wall 34 facing 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. In this way, the first box body 20 can be closer to the open side of the second box body 30, thereby facilitating the assembly of the first box body 20 and the second box body 30. In this way, the second side wall 34 of the second box body 30 is relatively high along the first direction X, and the second box body 30 can be a high-walled box structure, which can also be called a high-walled box body. The size of the first side wall 23 of the first box body 20 can be set to be smaller, thereby facilitating the assembly of the first box body 20 and the second box body 30.

[0192] 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 .

[0193] As shown in Figures 12 to 15, in some embodiments, 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.

[0194] As shown in Figures 12 and 13, the second side wall 34 is bent from one end of the second end wall 33 to form a recess C that opens toward the first end wall 22 along the first direction X. After the second side wall 34 is bent, a portion of the inner surface of the second side wall 34 forms the wall surface of the recess C, and a portion of the inner surface of the second side wall 34 can form the second sealing surface 32. In this embodiment, the inner 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 being bent. After the second side wall 34 is bent to form the recess C, the surface of the bottom wall of the recess C in the first direction X that faces away from the enclosed space A can protrude beyond the surface of the second end wall 33 that faces away from the enclosed space A. Forming the recess C by bending minimizes the impact on the strength of the second casing 30.

[0195] The first side wall 23 is inserted into the recess C. At least a portion of the surface of the first side wall 23 facing away from the enclosed 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 be in contact with each other. A sealant 40 is contained within the recess C and is located on the side of the first side wall 23 facing the enclosed space A. The sealant 40 can connect the surface of the first side wall 23 facing the enclosed space A and the wall surface of the recess C opposite the surface of the first side wall 23 facing the enclosed space A, so that the first sealing surface 21, the second sealing surface 32, and the sealant 40 jointly seal the enclosed space A.

[0196] Of course, in other embodiments, 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 entirely 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. In which, a space for accommodating the sealant 40 can also be formed between the first sealing surface 21 and the second sealing surface 32. In an embodiment where 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 enclosed space A and the surface of the recess C and the surface of the first side wall 23 facing the enclosed space A can be fitted together or a gap can be formed.

[0197] In an embodiment where the second housing 30 includes two second side walls 34 , the two second side walls 34 can be bent to form a recess C, with the recesses C of the two second side walls 34 respectively located at both ends of the second end wall 33 along the second direction Y. The two first side walls 23 can be respectively inserted into the recesses C formed by the bending of the two second side walls 34 .

[0198] As shown in Figures 14 and 15, the first side wall 23 bends from one end of the first end wall 22 to form a recessed portion C that opens toward the second end wall 33 along the first direction X. After the first side wall 23 is bent, a portion of the inner side surface of the first side wall 23 forms the wall surface of the recessed portion C, and a portion of the inner side surface of the first side wall 23 can form the first sealing surface 21. In this embodiment, 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 being bent. After the first side wall 23 is bent to form the recessed portion C, the bottom surface of the recessed portion C in the first direction X, which faces away from the enclosed space A, can protrude beyond the surface of the first end wall 22 facing away from the enclosed space A.

[0199] The concave portion C is formed by bending, which has little effect on the strength of the first housing 20 .

[0200] The second side wall 34 is inserted into the recess C. At least a portion of the surface of the second side wall 34 facing away from the enclosed 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 in contact with each other. The sealant 40 is contained within the recess C and is located on the side of the second side wall 34 facing the enclosed space A. The sealant 40 can connect the surface of the second side wall 34 facing the enclosed space A and the wall surface of the recess C opposite the surface of the second side wall 34 facing the enclosed space A, so that the first sealing surface 21, the second sealing surface 32, and the sealant 40 jointly seal the enclosed space A.

[0201] Of course, in other embodiments, 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 entirely 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. In which, a space for accommodating the sealant 40 can also be formed between the first sealing surface 21 and the second sealing surface 32. In the embodiment where 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 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 can be fitted together or a gap can be formed.

[0202] In an embodiment where the first housing 20 includes two first side walls 23 , the two first side walls 23 may be bent to form a recessed portion C, with the recessed portions C of the two first side walls 23 respectively located at both ends of the first end wall 22 along the second direction Y. The two second side walls 34 may be respectively inserted into the recessed portions C formed by the bending of the two first side walls 23 .

[0203] 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. The recess can be formed without reducing the strength of the second side wall 34. The first side wall 23 is inserted into the recess to limit the first side wall 23 and improve the stability of the fit between the first box body 20 and the second box body 30.

[0204] In some embodiments, 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 .

[0205] Along the second direction Y, at least a portion of the battery cell 10 extends to the opening of the recess C. In the embodiment where the recess C is provided at opposite ends of the second end wall 33 along the second direction Y, the battery cell 10 extends along the second direction Y to the opening of the recess C. When projected in the first direction X, a portion of the projection of the battery cell 10 is located within the recess C.

[0206] 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. Thus, the battery cell 10 can fully utilize the enclosed space A, thereby increasing 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.

[0207] As shown in FIG. 16 to FIG. 24 , in some embodiments, the first sealing surface 21 and the second sealing surface 32 are both perpendicular to the first surface 31 .

[0208] The first sealing surface 21 and the second sealing surface 32 are arranged opposite to and in parallel with the first surface 31 .

[0209] The first sealing surface 21 and the second sealing surface 32 are both perpendicular to the first surface 31. Compared with the situation where the first sealing surface 21 and the second sealing surface 32 are 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, which can ensure that 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.

[0210] As shown in Figures 16 to 22, in an embodiment where the first sealing surface 21 and the second sealing surface 32 are both perpendicular to the first surface 31, 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.

[0211] The first side wall 23 is connected to an end portion 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 .

[0212] The second direction Y is 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. If 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. Alternatively, the first sealing surface 21 and the second sealing surface 32 are both perpendicular to the width direction of the battery 100. Under the same sealing width, compared to the case where the first sealing surface 21 and the second sealing surface 32 are parallel to the first surface 31 (the first sealing surface 21 and the second sealing surface 32 are both parallel to the second direction Y), the case where the first sealing surface 21 and the second sealing surface 32 are both perpendicular to the first surface 31 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, thereby accommodating more battery cells 10 or reducing the volume of the battery 100, thereby improving the volumetric energy density of the battery 100. The battery 100 has a smaller width, which can also help reduce the width of the electrical equipment powered by the battery 100. For example, if the electrical equipment is a heavy truck, the heavy truck can be made smaller in the width direction of the battery 100 when powered by the battery 100 provided in the embodiment of the application. Generally, the width of the battery 100 is substantially the same as that of the heavy truck, that is, the heavy truck can have a smaller width.

[0213] The first end wall 22 and the first side wall 23 are arranged perpendicularly 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 perpendicularly 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 opposite and parallel to each other along the second direction Y.

[0214] 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 .

[0215] 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.

[0216] In some embodiments, in the second direction Y, 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.

[0217] 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. On the one hand, it is convenient to enable the first box body 20 and the second box body 30 to enclose a closed space A for accommodating the battery cell 10. On the other hand, the first sealing surface 21 is provided on the first side wall 23, and the second sealing surface 32 is provided on the second side wall 34. The area of ​​the first sealing surface 21 and the second sealing surface 32 can be made 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.

[0218] As shown in FIG. 16 and FIG. 17 , in some embodiments, a sealant 40 is filled between the first sealing surface 21 and the second sealing surface 32 .

[0219] The first sealing surface 21 and the second sealing surface 32 are spaced relative to each other in the second direction Y, forming a glue-containing space B between the first sealing surface 21 and the second sealing surface 32. In an embodiment in which the first side wall 23 and the first end wall 22 are arranged perpendicularly, and the second side wall 34 and the second end wall 33 are arranged perpendicularly, the glue-containing space B between the first sealing surface 21 and the second sealing surface 32 can be a space with equal spacing; the glue-containing space B between the first sealing surface 21 and the second sealing surface 32 can also be a space with variable spacing that gradually increases or decreases along the third direction Z.

[0220] The first sealing surface 21 and the second sealing surface 32 are filled with sealant 40, which not only improves 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.

[0221] In the embodiment where both the first sealing surface 21 and the second sealing surface 32 are 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 a sealing member such as a gasket or a sealing ring. 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 in contact or bonded contact, and the sealing member and the second sealing surface 32 can be in contact or bonded contact.

[0222] In some embodiments, 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 sidewall 23 .

[0223] In an embodiment where both the first sealing surface 21 and the second sealing surface are perpendicular to the first surface 31, 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.

[0224] A portion of the sealant 40 may extend to one side of the battery cell 10 in the second direction Y, or the entire sealant 40 may be located on one side of the battery cell 10 in the second direction Y.

[0225] Projected along the second direction Y, the projection of the sealant 40 at least partially overlaps with the projection of the battery cell 10, thereby reducing the space occupied by the sealant 40 in other directions intersecting the second direction Y. The sealant 40 can fully utilize the space of the battery 100 in the second direction Y, thereby facilitating an improvement in the energy density of the battery 100. The other directions intersecting the second direction Y may be any direction intersecting the second direction Y, such as a first direction X perpendicular to the second direction Y, or a third direction Z perpendicular to both the first direction X and the second direction Y.

[0226] In an embodiment where the first sealing surface 21 and the second sealing surface 32 are both perpendicular to the first surface 31 , as shown in FIG. 16 to FIG. 20 , the battery 100 further includes a glue blocking structure 50 , which is disposed in the enclosed space A near the first sealing surface 21 and the second sealing surface 32 .

[0227] The sealant blocking structure 50 is used to block the sealant 40 filled in the sealant 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 space B overflowing into the closed space A.

[0228] 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.

[0229] 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.

[0230] As shown in Figures 16 to 20, in some embodiments, the glue blocking structure 50 can be disposed on the first surface 31. The glue blocking structure 50 is disposed on the first surface 31 to facilitate the disposition of the glue blocking structure 50.

[0231] The glue blocking structure 50 provided on the first surface 31 can have various forms. As shown in Figures 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.

[0232] 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 .

[0233] In an embodiment where the first housing 20 includes a first end wall 22 and a first side wall 23, an 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 facing away from the second side wall 34. The first protrusion 51 not only prevents the sealant 40 between the first sealing surface 21 and the second sealing surface 32 from overflowing into the enclosed space A, but also prevents the first side wall 23 from deforming away from the first side wall 23, thereby maintaining the enclosed space A substantially unchanged from its initial dimensions. This reduces the risk of the first side wall 23 deforming away from the second side wall 34 and squeezing the battery cell 10, and also reduces the risk of the sealant 40 failing to seal between the first sealing surface 21 and the second sealing surface 32 due to the gradual increase in the adhesive space B between the first sealing surface 21 and the second sealing surface 32 caused by the deformation of the first side wall 23 away from the second side wall 34.

[0234] In an embodiment where the 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 provided on the first surface 31, and the two first protrusions 51 are respectively provided 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.

[0235] As shown in Figures 18-21, in some embodiments, 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.

[0236] A receiving groove 54 is formed on the first surface 31 of the second end wall 33. 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 a groove wall surface of the receiving groove 54. The receiving groove 54 and a groove wall surface arranged opposite to the second side wall 34 form a glue blocking structure 50. The receiving groove 54 can also be regarded as a glue blocking space.

[0237] A portion of the first housing 20 is inserted into the receiving groove 54. In the embodiment where the first housing 20 includes a first end wall 22 and a first side wall 23, an 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.

[0238] In some embodiments, as shown in Figures 18 and 19, the thickness of the second end wall 33 at the location corresponding to the receiving groove 54 is less than the thickness at other locations of the second end wall 33. Such receiving groove 54 can be formed by thinning a portion of the second end wall 33, or by integral molding such as casting or injection molding.

[0239] In other embodiments, as shown in Figures 19 and 20, 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 facing 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. In this way, the thickness of the second end wall 33 at the position corresponding to the receiving groove 54 is consistent with the thickness at other positions of the second end wall 33, thereby providing the second end wall 33 with better structural strength. Such receiving grooves 54 can be formed by stamping, bending, etc.

[0240] The first side wall 23 is inserted into the receiving groove 54, which not only limits the first side wall 23, but also limits 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 not only improves 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, 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.

[0241] In an embodiment where the glue blocking structure 50 is arranged on the first surface 31, 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 the first direction X, which can reduce the space occupied by the second side wall 34 in the first direction X.

[0242] As shown in FIG. 22 , in some embodiments, 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 .

[0243] At least a portion of the battery cell 10 extends to the opening of the receiving groove 54 along the second direction Y. In an embodiment in which two receiving grooves 54 are provided at opposite ends of the second end wall 33 along the second direction Y, the battery cell 10 extends to the opening 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 within the receiving groove 54.

[0244] 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. Thus, the battery cell 10 can fully utilize the enclosed space A, thereby increasing 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.

[0245] As shown in Figure 2, in some embodiments, the first box body 20 also includes two third side walls 24, which 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.

[0246] In some embodiments, the second box body 30 also includes two fourth side walls 35, which 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.

[0247] 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. When the battery 100 is used in a heavy truck, the third direction Z may be substantially consistent with the length direction of the heavy truck.

[0248] 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 .

[0249] 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 space occupied by the third sealing surface and the fourth sealing surface in the third direction Z. 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, thereby realizing the connection between the first box body 20 and the second box body 30. In this way, it is not necessary to set other connecting parts 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.

[0250] Of course, the third sealing surface and the fourth sealing surface may also be parallel to the first surface 31 .

[0251] As shown in Figure 23, the first housing 20 can be a plate-like structure, while the second housing 30 is a hollow structure with one side open to form a housing cavity for accommodating the battery cells 10. The first housing 20 forms first sealing surfaces 21 with the two end surfaces facing the two second side walls 34 along the second direction Y. A sealant space B for disposing the sealant 40 can be formed between the first sealing surface 21 and the second sealing surface 32. The surface of the first housing 20 facing away from the first surface 31 can be coplanar with the end surface of the second side wall 34 facing away from the second end wall 33.

[0252] As shown in Figure 24, the second housing 30 can be a plate-like structure, while the first housing 20 is a hollow structure with one side open to form a housing cavity for accommodating the battery cells 10. The second housing 30 forms second sealing surfaces 32 along the second direction Y with the two end surfaces facing the two first side walls 23. A sealant space B for disposing the sealant 40 can be formed between the first sealing surface 21 and the second sealing surface 32. The surface of the second housing 30 facing away from the first surface 31 can be coplanar with the end surface of the first side wall 23 facing away from the first end wall 22.

[0253] An embodiment of the present application further provides an electric device, which includes the battery 100 provided in any of the above embodiments.

[0254] 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.

[0255] The present invention provides a battery 100 in an embodiment. The battery 100 includes a battery cell 10, a first housing 20, and a second housing 30. The battery cell 10 is housed in an enclosed space A defined by the first housing 20 and the second housing 30. The first housing 20 includes a first end wall 22 and a first side wall 23. The first end wall 22 is connected to the first side wall 23 at both ends along the second direction Y. 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" shape. The second housing 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 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. The two second side walls 34 are arranged perpendicular to the second end wall 33. The dimensions of the two second side walls 34 along the first direction X are greater than the dimensions of the first side wall 23 along the first direction X. The second housing 30 has a high side wall structure. The first sidewall 23 is located on the side of the second sidewall 34 that is closest to the enclosed space A. A portion of the surface of the first sidewall 23 facing away from the enclosed space A forms the first sealing surface 21, and a portion of the surface of the second sidewall 34 that is closest to the enclosed space A forms the second sealing surface 32. A space for accommodating 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 that faces the enclosed space A is the first surface 31, which supports the battery cells 10. The first inner surfaces of both second sidewalls 34 are each provided with a first protrusion 51. The ends of the two first sidewalls 23 of the first housing 20 that are distal to the first end wall 22 are supported on the first abutment surfaces 511 of the two first protrusions 51 that face away from the second end wall 33. Alternatively, the first inner surfaces of both second sidewalls 34 are each provided with a groove 52 that extends to the end of the second sidewall 34 that is distal to the second end wall 33. The ends of the two first sidewalls 23 of the first housing 20 that are distal to the first end wall 22 are respectively inserted into the two grooves 52 and abut against the groove walls of the grooves 52.

[0256] The embodiment of the present application provides a battery 100, which includes a battery cell 10, a first housing 20, and a second housing 30. The battery cell 10 is housed in an enclosed space A defined by the first housing 20 and the second housing 30. The first housing 20 includes a first end wall 22 and a first side wall 23. The first end wall 22 is connected to the first side wall 23 at both ends along the second direction Y, and the two first side walls 23 are arranged perpendicular to the first end wall 22. The second housing 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 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 dimensions of the two second side walls 34 along the first direction X are smaller than the dimensions of the first side wall 23 along the first direction X, and the second housing 30 has a low side wall structure. The first side wall 23 is located on the side of the second side wall 34 close to the enclosed space A. A portion of the surface of the first side wall 23 away from the enclosed space A forms a first sealing surface 21, and a portion of the surface of the second side wall 34 close to the enclosed space A forms a second sealing surface 32. A storage space for 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 enclosed space A is the first surface 31, and the first surface 31 supports the battery cell 10. Two second protrusions 53 are protruding from the first surface 31. The two second protrusions 53 are arranged at intervals along the second direction Y. The second protrusions 53 are glue-blocking structures 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.

[0257] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery comprising: Battery cells; A first housing including a first sealing surface; A second box body, the second box body comprising a first surface and a second sealing surface, the first surface being used for supporting 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 the first surface, and the second sealing surface intersects the first surface.

2. The battery according to claim 1, wherein At least one of the first sealing surface and the second sealing surface is perpendicular to the first surface.

3. The battery according to claim 1 or 2, wherein: 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 the first surface.

4. The battery according to claim 3, wherein 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 surface away from the closed space.

5. The battery according to claim 4, wherein The second sealing surface is perpendicular to the first surface, and is located on a side of the first sealing surface away from the closed space.

6. The battery according to any one of claims 3 to 5, wherein: The first box body comprises 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. The second sealing surface is arranged on the second side wall.

7. The battery according to claim 6, wherein 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.

8. The battery according to claim 7, wherein The first sealing surface and the second sealing surface together form a sealant containing space for containing sealant.

9. The battery according to claim 8, wherein Projected along the first direction, the projection of the adhesive holding space at least partially overlaps with the projection of the battery cell.

10. The battery according to claim 8, wherein The battery further comprises a glue blocking structure, and the glue blocking structure is arranged at the junction of the closed space and the glue containing space.

11. The battery according to claim 10, wherein The glue blocking structure is arranged on the second side wall.

12. The battery according to claim 11, wherein The glue blocking structure is a first protrusion convexly arranged on the inner surface of the second side wall, and the first box body is supported by the first protrusion.

13. The battery according to claim 11, wherein 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.

14. The battery according to claim 6, wherein 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 recessed portion, and the first side wall is inserted into the recessed portion; 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 recessed portion, and the second side wall is inserted into the recessed portion; The recess is used to accommodate the sealant.

15. The battery according to claim 14, wherein Projected along the first direction, the projection of the recess at least partially overlaps with the projection of the battery cell.

16. The battery according to claim 1 or 2, wherein: The first sealing surface and the second sealing surface are both perpendicular to the first surface.

17. The battery according to claim 16, wherein: The first box body comprises 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. The second sealing surface is arranged on the second side wall.

18. The battery according to claim 17, wherein The space between the first sealing surface and the second sealing surface is filled with sealant.

19. The battery according to claim 18, wherein Projected along a second direction, 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.

20. The battery according to claim 18, wherein The battery further includes a glue blocking structure, and the glue blocking structure is arranged in the closed space at a position close to the first sealing surface and the second sealing surface.

21. The battery according to claim 20, wherein The glue blocking structure is disposed on the first surface.

22. The battery according to claim 20, wherein The glue blocking structure is a second protrusion convexly arranged on the first surface, and a portion of the first box body is located between the second side wall and the second protrusion.

23. The battery according to claim 1 or 2, wherein: The first box body comprises 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 comprises a second end wall, the first end wall and the second end wall are arranged opposite 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.

24. The battery according to claim 23, wherein Projected along the first direction, the projection of the receiving groove at least partially overlaps with the projection of the battery cell.

25. An electrical device comprising the battery according to any one of claims 1 to 24.

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