Battery, energy storage device and electric equipment

Abstract

The invention discloses a battery, an energy storage device and electric equipment. The battery comprises a battery cell; a first box body; the second box body is connected with the first box body so as to jointly define a closed space for accommodating the battery monomers; wherein the first box body comprises a first side wall and a bottom wall, the first side wall is connected with the second box body, and the first side wall is of a non-closed structure in the circumferential direction of the bottom wall. According to the technical scheme, the energy density of the battery can be improved.

Description

Batteries, energy storage devices and electrical equipment Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery, an energy storage device, and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] In the development of battery technology, how to improve the energy density of batteries is a technical problem that needs to be solved urgently.

[0004] Summary of the Invention

[0005] The present application provides a battery, an energy storage device, and an electrical device. The technical solution provided in the present application can improve the energy density of the battery.

[0006] This application is achieved through the following technical solutions:

[0007] In a first aspect, the present application provides a battery comprising a battery cell; a first box body; and a second box body, wherein the second box body and the first box body are connected to jointly form a closed space for accommodating the battery cell; wherein the first box body comprises a first side wall and a bottom wall, the first side wall is connected to the second box body, and along the circumference of the bottom wall, the first side wall is a non-closed structure.

[0008] At present, the side wall of the first box body is a closed structure, and the first box body has a draft angle, which causes the side wall to interfere with the battery cell, making the part of the enclosed space corresponding to the draft angle unable to be utilized. For this reason, in the above scheme, by setting the first side wall to a non-closed structure (that is, canceling part of the side wall of the first box body), the part of the side wall of the second box body (corresponding to the part of the first box body not provided with the first side wall) is directly connected to the bottom wall of the first box body, which can reduce the interference of this part of the side wall of the first box body with the battery cell in the enclosed space, and correspondingly increase the volume of the enclosed space, thereby accommodating more battery cells or electronic components, thereby increasing the volume energy density of the battery.

[0009] According to some embodiments of the present application, the second box is connected to an edge of the bottom wall where the first side wall is not provided.

[0010] In the above solution, the second box body is connected to the edge of the bottom wall where the first side wall is not provided, which can increase the volume of the enclosed space as much as possible, so that the battery has a higher volume energy density.

[0011] According to some embodiments of the present application, the bottom wall includes a first area and a second area, the first area and the second area are arranged side by side along a first direction, the first side wall is arranged at the edge of the first area, the edge of the second area is not provided with the first side wall, and the first direction is perpendicular to the thickness direction of the bottom wall.

[0012] In the above scheme, along the first direction, the edges of the second area arranged side by side with the first area are not provided with a first side wall, and the part of the second box corresponding to the first area is directly connected to the bottom wall, which will increase the space above the part of the second area without a side wall, improve the utilization rate of the enclosed space, and thus maximize the volume energy density of the battery.

[0013] According to some embodiments of the present application, the battery further includes electronic components, which are accommodated in the enclosed space and at least partially disposed in the second area, and the battery cells are disposed in the first area.

[0014] In the above solution, by eliminating the side walls at the edge of the second area, the space above the second area is increased. Along the thickness direction of the bottom wall, the electronic components are smaller than the battery cells. Therefore, the smaller electronic components are arranged in the second area, and the battery cells are arranged in the first area. This can reduce the encroachment of the electronic components on the first area, so that more battery cells can be placed in the first area, thereby improving the volume energy density of the battery.

[0015] According to some embodiments of the present application, the first area includes a first edge and two second edges, the two second edges are arranged opposite to each other along a second direction, the first edge connects the two second edges, the first side wall is arranged at the first edge and the two second edges, and the second direction is perpendicular to the thickness direction of the bottom wall.

[0016] In the above solution, by arranging the first side wall at the first edge and the two second edges, the structural strength of the first box body and the structural strength of the battery can be ensured, so that the battery cell has higher safety.

[0017] According to some embodiments of the present application, both of the second edges extend along the first direction, and the first direction, the second direction, and the thickness direction of the bottom wall are perpendicular to each other.

[0018] In the above solution, since the first direction, the second direction and the thickness direction of the bottom wall are perpendicular to each other, the first box is a square box. Compared with non-square boxes, the square box can be manufactured more efficiently, thereby improving the manufacturing efficiency of the battery.

[0019] According to some embodiments of the present application, the length of the second edge is greater than the length of the first edge.

[0020] In the above solution, along the first direction, the edge of the bottom wall opposite to the first edge is an edge without the first side wall, so the edge with the shorter length of the bottom wall is not provided with the first side wall, which can improve the structural strength of the first box.

[0021] According to some embodiments of the present application, the first box body further includes a first flange, the first flange extending outward from an end of the first side wall away from the bottom wall, and the first side wall is connected to the second box body through the first flange.

[0022] In the above solution, by providing the first flange, the first side wall and the second box body can be conveniently and effectively connected, so that the first side wall and the second box body have a stable and sealed connection relationship, ensuring the safety of the battery cells in the enclosed space.

[0023] According to some embodiments of the present application, along the second direction, the second area exceeds the two second edges; the first box body also includes a transition portion, and the end of the first flange and the portion of the second area exceeding the second edge are connected by the transition portion.

[0024] In the above solution, along the second direction, by setting the second area beyond the second edge and providing a transition portion, the first flange and the second area are connected, ensuring that the first box has a flat outer contour, which is convenient for connection with the second box.

[0025] According to some embodiments of the present application, the transition portion is arranged obliquely relative to the bottom wall.

[0026] In the above solution, by arranging the transition portion at an angle, the sealing between the first flange and the second box body can be improved, thereby ensuring the safety of the battery.

[0027] According to some embodiments of the present application, an inclination angle of the transition portion relative to the bottom wall is α, satisfying 0°<α≤60°.

[0028] In the above solution, the inclination angle of the transition portion relative to the bottom wall is set to no more than 60°, so as to reduce the risk of sealing failure between the second box body and the first flange, thereby ensuring the sealing of the first box body and the second box body.

[0029] According to some embodiments of the present application, the second box body includes a top wall, a second side wall and a second flange, the second side wall is arranged at the edge of the top wall, and the second flange extends outward from one end of the second side wall away from the top wall; the second flange includes a first part, a second part and a third part, the first part is connected to the edge of the bottom wall where the first side wall is not set, the second part is arranged corresponding to the transition part, and the third part is connected to the first flange.

[0030] In the above solution, the second housing is connected to the edge of the bottom wall not provided with the first sidewall, the transition portion, and the first flange via the second flange, ensuring the seal between the first and second housings. Furthermore, the second sidewall is arranged around the edge of the top wall to form a chamber, thereby increasing the volume of the enclosed space and accommodating more battery cells, resulting in a higher volumetric energy density.

[0031] According to some embodiments of the present application, the second box body includes a top wall, a second side wall and a second flange, the second side wall is arranged on a partial edge of the top wall, and the second flange extends outward from an end of the second side wall away from the top wall; the second flange includes a first part and a second part, the first part is connected to the edge of the bottom wall where the first side wall is not set, the second part is arranged corresponding to the transition part, and the edge of the top wall where the second side wall is not set is connected to the first flange.

[0032] In the above solution, the main body of the second housing is plate-shaped, with a second sidewall disposed along a portion of its edge to correspond to the portion of the first housing not provided with the first sidewall. This provides the advantages of a simple structure and low material costs. Furthermore, the second housing connects the edge of the bottom wall not provided with the first sidewall and the transition portion via a second flange, and the edge of the plate-shaped top wall connects to the first flange. This ensures a tight seal between the first and second housings, thereby ensuring battery safety.

[0033] According to some embodiments of the present application, the second portion is tilted relative to the first portion.

[0034] In the above solution, the second part is arranged corresponding to the transition part. When the transition part is arranged at an angle, by arranging the second part at an angle, the connection stability and sealing between the second part and the transition part can be improved, thereby ensuring the safety of the battery.

[0035] According to some embodiments of the present application, the second portion and the transition portion are parallel to each other.

[0036] In the above solution, the second part is parallel to the transition part to ensure that the second part can be effectively and tightly connected to the transition part, ensuring the connection stability and sealing of the first box and the second box, thereby ensuring the safety of the battery.

[0037] According to some embodiments of the present application, the bottom wall, the first side wall, and the first flange are integrally formed.

[0038] In the above solution, by integrally forming the first side wall and the first flange on the bottom wall, the structural strength of the first box body can be improved, ensuring that the battery cells are safely located in the closed space.

[0039] According to some embodiments of the present application, the first box body is formed by stamping, die casting or bending.

[0040] In the above solution, the first housing is manufactured by stamping, die-casting or bending, which can make the first housing have a higher manufacturing efficiency, so that the battery has a higher manufacturing efficiency.

[0041] According to some embodiments of the present application, the battery includes a flow channel for accommodating a heat exchange medium to regulate the temperature of the battery cell; the battery also includes an inlet pipe and an outlet pipe, both of which are connected to the flow channel, and both of which are located outside the enclosed space.

[0042] In this solution, flow channels are provided to regulate the temperature of the battery cells, reducing the risk of thermal runaway and improving battery safety. Furthermore, the inlet and outlet pipes are located outside the enclosed space, making it easy to connect external pipes to the inlet and outlet pipes to achieve circulation of the heat exchange medium.

[0043] According to some embodiments of the present application, the inlet pipe and the outlet pipe are both located on a side of the bottom wall facing the second box body.

[0044] In the above scheme, the inlet pipe and the outlet pipe are both arranged toward the side of the bottom wall facing the second box body, so as to rationally utilize the height space of the battery and realize the plugging and unplugging of the external pipes and the inlet pipe and the outlet pipe. Compared with the scheme in which the inlet pipe and the outlet pipe are arranged horizontally, the lateral dimension of the battery that is additionally set due to the plugging and unplugging of the external pipes can be reduced, thereby streamlining the volume of the entire battery and achieving the purpose of improving the volume energy density of the battery.

[0045] According to some embodiments of the present application, along the direction of the bottom wall pointing to the second box, the inlet pipe and the outlet pipe do not extend beyond the second box.

[0046] In the above solution, the inlet pipe and the outlet pipe are arranged not to exceed the second box body, so as to ensure that the plugging and unplugging positions of the inlet pipe and the outlet pipe and the external pipeline are within the height range of the battery.

[0047] According to some embodiments of the present application, the inlet pipe and the outlet pipe are both arranged obliquely or vertically relative to the bottom wall.

[0048] In the above solution, the inlet pipe and the outlet pipe are arranged obliquely or perpendicularly to the bottom wall in the direction of plugging and unplugging of the external pipeline, so that the height space of the battery can be reasonably utilized for plugging and unplugging without taking up additional space, thereby ensuring the volume energy density of the battery.

[0049] According to some embodiments of the present application, the second box body includes a top wall, a second side wall and a second flange, the second side wall is arranged at the edge of the top wall, and the second flange extends outward from one end of the second side wall away from the top wall; the second flange is provided with a first avoidance portion and a second avoidance portion, and the inlet pipe and the outlet pipe pass through the first avoidance portion and the second avoidance portion respectively.

[0050] In the above scheme, the sealing of the first box body and the second box body can be improved by providing the second flange, thereby ensuring the sealing of the battery; in order to avoid adjusting the second flange toward the closed space to avoid the inlet pipe and the outlet pipe, which leads to a reduction in the volume of the closed space, the first avoidance portion and the second avoidance portion are provided to avoid the inlet pipe and the outlet pipe respectively, thereby ensuring that the volume of the closed space is not affected, so that the battery has a higher energy density.

[0051] According to some embodiments of the present application, the first avoidance portion and the second avoidance portion are notches provided on the edge of the second flange.

[0052] In the above solution, the first avoidance portion and the second avoidance portion are notches formed on the edge of the second flange, and their formation is simple and convenient.

[0053] According to some embodiments of the present application, the flow channel is formed inside the bottom wall, and the inlet pipe and the outlet pipe are both arranged at an edge of the bottom wall where the first side wall is not arranged.

[0054] In the above solution, the flow channel is arranged inside the bottom wall. By arranging the inlet pipe and the outlet pipe at the edge of the bottom wall where the first side wall is not provided, the first side wall can be reasonably avoided, thereby preventing the inlet pipe and the outlet pipe from interfering with the first side wall, reducing the difficulty of battery assembly, and improving the manufacturing efficiency of the battery.

[0055] According to some embodiments of the present application, a connection point between the inlet pipe and the bottom wall, and a connection point between the outlet pipe and the bottom wall are both located outside the closed space.

[0056] In the above solution, the connection between the inlet pipe and the bottom wall, and the connection between the outlet pipe and the bottom wall are arranged outside the closed space, which can avoid opening holes in the first box body or the second box body to lead the inlet pipe and the outlet pipe to the outside of the closed space. Therefore, the sealing process of the openings can be reduced, thereby ensuring the sealing of the battery and reducing the difficulty of assembling the battery.

[0057] According to some embodiments of the present application, the inlet pipe and the outlet pipe are respectively arranged at two corners of the bottom wall.

[0058] In the above solution, the inlet pipe and the outlet pipe are arranged at the corners of the bottom wall, which can avoid the inlet pipe and the outlet pipe from encroaching on the closed space and ensure that the battery has a higher energy density.

[0059] According to some embodiments of the present application, the bottom wall includes a first substrate and a second substrate stacked together, the second substrate is arranged on a side of the first substrate facing away from the second box body, and the flow channel is formed between the second substrate and the first substrate.

[0060] In the above solution, the first substrate and the second substrate are stacked to form the flow channel, so that the bottom wall structure is simple and easy to manufacture.

[0061] According to some embodiments of the present application, the first sidewall is connected to the first substrate.

[0062] In the above solution, the first substrate is closer to the second box than the second substrate, so the first side wall is arranged on the first substrate, which can conveniently connect the first box and the second box, reducing the difficulty of battery assembly.

[0063] According to some embodiments of the present application, a groove is formed on the surface of the second substrate facing the first substrate, and the surface of the first substrate facing the first substrate and the groove together form the flow channel.

[0064] In the above solution, grooves are formed on the surface of the second substrate by a simple process (such as stamping) to form a flow channel together with the first substrate, so that the heat exchange medium can effectively regulate the temperature of the battery cell and improve the safety of the battery.

[0065] According to some embodiments of the present application, the battery further includes a thermal management component, the flow channel is arranged in the thermal management component, the thermal management component is arranged in the enclosed space, and the inlet pipe and the outlet pipe are both arranged in the thermal management component.

[0066] In the above solution, a thermal management component is provided to adjust the temperature of the battery cell, so that the battery has higher safety.

[0067] According to some embodiments of the present application, the battery further includes a frame, which is disposed on a side of the first box body facing away from the second box body, and the frame is used to support the first box body.

[0068] In the above solution, a frame is provided to support the first box body, thereby ensuring that the battery has a high structural strength and the safety of the battery is guaranteed.

[0069] According to some embodiments of the present application, the first box body also includes a first flange, which extends outward from an end of the first side wall away from the bottom wall, and the first side wall is connected to the second box body through the first flange; the frame includes a side beam, which is arranged along the first flange, and the first flange is overlapped with the side beam.

[0070] In the above solution, the edge is arranged along the flange of the first box body and supports the first flange to rationally utilize the height space existing due to the first flange and the first side wall of the first box body, ensuring that the battery has a lower center of gravity and making the battery have higher stability.

[0071] According to some embodiments of the present application, a first cavity is formed between the first side wall and the side beam.

[0072] In the above solution, the first cavity formed by the first side wall and the side beam can collapse and absorb energy after the battery is impacted, thereby improving the impact resistance of the battery and making the battery safer.

[0073] According to some embodiments of the present application, the side beam includes a first supporting surface and a second supporting surface. Along the thickness direction of the bottom wall, the first supporting surface protrudes from the second supporting surface, the first flange overlaps the first supporting surface, and the bottom wall overlaps the second supporting surface.

[0074] In the above solution, the first flange is supported by the first supporting surface, and the bottom wall is supported by the second supporting surface, so as to ensure that the side beam supports the first box body and ensure that the battery has a high structural strength.

[0075] According to some embodiments of the present application, a second cavity is formed inside the side beam.

[0076] In the above solution, the second cavity formed inside the side beam can collapse and absorb energy after the battery is impacted, thereby improving the battery's impact resistance and making the battery safer.

[0077] According to some embodiments of the present application, the side beam is formed by bending a plate-like component.

[0078] In the above solution, the side beams are formed by bending plate-like components, which can improve the manufacturing efficiency of the side beams and ensure the manufacturing efficiency of the battery.

[0079] According to some embodiments of the present application, a second cavity is formed inside the side beam; the side beam includes a first connecting wall bent relative to the first support surface and a second connecting wall bent relative to the second support surface, and the first connecting wall and the second connecting wall are stacked and welded.

[0080] In the above solution, by stacking and welding the first connecting wall bent on the first supporting surface and the second connecting wall bent on the second supporting surface, the structural strength of the side beam can be improved and the supporting effect on the first box body can be ensured.

[0081] According to some embodiments of the present application, the end of at least one of the first connecting wall and the second connecting wall includes an extension section, which extends into the second cavity and abuts against the bottom edge of the side beam, and the bottom edge is arranged opposite to the first support surface and the second support surface.

[0082] In the above solution, by providing the extension section, the extension section and the bottom edge of the side beam are in contact with each other, thereby improving the structural strength of the side beam and ensuring the supporting effect for the first box body.

[0083] According to some embodiments of the present application, the extension section abuts against a middle area of ​​the bottom edge.

[0084] In the above solution, the extension section abuts against the middle area of ​​the bottom edge, so that the bottom edge is evenly stressed, ensuring that the side beam has a stable structure to effectively support the first box body.

[0085] According to some embodiments of the present application, the extension section is welded to the bottom edge.

[0086] In the above solution, the extension section is connected to the bottom edge by welding, so that the side beam structure is stable to effectively support the first box body.

[0087] According to some embodiments of the present application, the cross-section of the side beam is L-shaped.

[0088] According to some embodiments of the present application, the side beam includes a first side beam and two second side beams, the two second side beams are arranged opposite to each other along a second direction, the first side beam connects the two second side beams, and the second direction is perpendicular to the thickness direction of the bottom wall.

[0089] In the above solution, the first side beam and the second side beam are respectively arranged to correspond to the first edge and the second edge of the first box body, so as to ensure that the side beams support the first box body and ensure that the battery has high safety.

[0090] According to some embodiments of the present application, the frame further includes a first bracket connecting the two second side beams.

[0091] In the above solution, by providing a first bracket to connect the two second side beams, the structural strength of the frame can be improved and the first box can be effectively supported.

[0092] According to some embodiments of the present application, the first bracket and the first side beam are spaced apart along a first direction, and the first direction, the second direction and the thickness direction of the bottom wall are perpendicular to each other.

[0093] In the above solution, along the first direction, the first bracket and the second side beam are spaced apart and both are connected to the second side beam, which can effectively improve the structural strength of the frame and ensure that the battery has higher safety.

[0094] According to some embodiments of the present application, the first bracket is connected to ends of the two second side beams away from the first side beam.

[0095] In the above solution, the first bracket is connected to the ends of the two second side beams away from the first side beam, which can effectively improve the structural strength of the frame and ensure that the first side beam and the second side beam can effectively support the first box.

[0096] According to some embodiments of the present application, the battery further includes a crossbeam, which is disposed on the bottom wall and divides the enclosed space into a plurality of accommodation spaces.

[0097] In the above solution, the enclosed space is divided into multiple accommodation spaces by providing cross beams, so as to rationally arrange the battery cells and electronic components and ensure the safety of the battery cells.

[0098] According to some embodiments of the present application, a through hole is formed on the bottom wall, and the first bracket is connected to the crossbeam via a fastener passing through the through hole.

[0099] In the above solution, the first bracket is connected to the crossbeam via a fastener, which can improve the connection stability between the frame and the first box, and ensure that the battery has a stable structure and has higher safety.

[0100] According to some embodiments of the present application, the frame further includes a second bracket connecting the first side beam and the second side beam.

[0101] In the above solution, the second bracket connects the first side beam and the second side beam to ensure the connection stability of the first side beam and the second side beam, so that the frame has a stable structure and effectively supports the first box body.

[0102] According to some embodiments of the present application, the frame is made of steel, and the first box is made of aluminum alloy.

[0103] In the above solution, the material of the first box is aluminum alloy, which ensures that the battery has a light weight to improve the weight energy density of the battery. On the other hand, to ensure the structural strength of the battery, the frame can be made of strong steel.

[0104] In a second aspect, the present application further provides an energy storage device comprising the battery described in any one of the first aspects.

[0105] In a third aspect, the present application further provides an electrical device comprising the battery described in any one of the first aspects, wherein the battery is used to provide electrical energy.

[0106] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0107] 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.

[0108] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0109] FIG2 is a perspective view of a battery in some embodiments of the present application;

[0110] FIG3 is a perspective exploded view of a battery in some embodiments of the present application;

[0111] FIG4 is a perspective view of a first box in some embodiments of the present application;

[0112] Figure 5 is an enlarged view of point A in Figure 4;

[0113] FIG6 is a top view of the first box in some embodiments of the present application;

[0114] FIG7 is a partial schematic diagram of the first box in some embodiments of the present application;

[0115] FIG8 is an enlarged view of point B in FIG3 ;

[0116] FIG9 is a schematic diagram of a second box in some other embodiments of the present application;

[0117] FIG10 is an enlarged view of point C in FIG9 ;

[0118] FIG11 is an enlarged view of point D in FIG3 ;

[0119] FIG12 is a partial cross-sectional view of the first box in some embodiments of the present application;

[0120] FIG13 is a schematic diagram of a second substrate in some embodiments of the present application;

[0121] FIG14 is a schematic diagram of a first box and a frame in some embodiments of the present application;

[0122] FIG15 is a perspective exploded view of the first box and the frame in some embodiments of the present application;

[0123] FIG16 is a partial cross-sectional view of a side beam and a first box body in some embodiments of the present application;

[0124] FIG17 is a partial cross-sectional view of a frame in some embodiments of the present application;

[0125] FIG18 is a schematic diagram of a side beam in some embodiments of the present application.

[0126] Icons: 100 - battery; 100a - battery cell; 100b - electronic component; 10 - first housing; 11 - first side wall; 12 - bottom wall; 12a - first region; 120 - first edge; 121 - second edge; 12b - second region; 13 - first flange; 14 - transition portion; 15 - first substrate; 16 - second substrate; 160 - groove; 20 - second housing; 21 - top wall; 22 - second side wall; 23 - second flange; 230 - first portion; 231 - second portion; 232 - third portion; 233 - first avoidance portion; 234 - second avoidance portion; 30 - flow channel; 31 - inlet pipe; 32 - outlet pipe; 40-frame; 41-side beam; 41a-first cavity; 41b-second cavity; 410-first supporting surface; 411-second supporting surface; 412-first connecting wall; 413-second connecting wall; 414-bottom edge; 415-first connecting side edge; 416-second connecting side edge; 417-extension section; 41c-first side beam; 41d-second side beam; 42-first bracket; 42a-convex hull; 42b-first supporting edge; 42c-second supporting edge; 43-second bracket; 50-cross beam; 60-seal; x-first direction; y-second direction; z-thickness direction; 1000-vehicle; 200-controller; 300-motor. DETAILED DESCRIPTION

[0127] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0128] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0129] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0130] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0131] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0132] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0133] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "length", "width", "thickness", "up", and "down" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present application.

[0134] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0135] 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 one or more battery cells. The battery also includes a first housing and a second housing, which are connected to form an enclosed space. The battery cells are arranged in the enclosed space to prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0136] In the development of battery technology, how to improve the energy density of batteries is a technical problem that needs to be solved urgently.

[0137] Currently, the first box body includes a bottom wall and a first side wall. The inventors found that in order to improve the structural strength of the battery, the first side wall is arranged around the edge of the bottom wall and is a closed structure. However, the inventors further studied and found that in order to facilitate manufacturing and demolding, the first box body has a draft angle (the draft angle refers to the mutual inclination between the bottom wall and the first side wall of the first box body). The existence of the draft angle will cause the first side wall to interfere with the vertical battery cell, making the part of the enclosed space corresponding to the draft angle unusable, resulting in space waste, and thus leading to low energy density of the battery.

[0138] In view of this, in order to solve the problem of low battery energy density caused by low space utilization due to too small draft angle, the inventor conducted in-depth research and designed a battery, eliminating part of the first side wall of the first box in the battery, so that the first side wall set on the bottom wall is a non-closed structure.

[0139] In the above scheme, on the one hand, a first side wall is provided on the bottom wall, which can ensure that the structural strength of the first box body meets the requirements; on the other hand, the first side wall is set to a non-closed structure, that is, the first side wall is not provided on part of the edge of the bottom wall, and there is no draft angle on the part of the first box body corresponding to the part without the first side wall, so that the space corresponding to the part is increased, thereby overcoming the problem of low utilization of the enclosed space due to the draft angle, so that the battery has a higher volume energy density.

[0140] 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.

[0141] 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.

[0142] The embodiments of the present application provide an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, a 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.

[0143] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0144] Please refer to Figure 1, which is a schematic diagram of the structure of the vehicle provided in some embodiments of the present application. 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. A battery 100 is provided inside the vehicle 1000, and the battery 100 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.

[0145] 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.

[0146] 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.

[0147] Please refer to Figures 2 to 5. Figure 2 is a stereoscopic diagram of a battery in some embodiments of the present application, Figure 3 is a stereoscopic exploded diagram of a battery 100 in some embodiments of the present application, Figure 4 is a stereoscopic diagram of a first box body 10 in some embodiments of the present application, and Figure 5 is an enlarged view of point A in Figure 4. According to some embodiments of the present application, the present application provides a battery 100, which includes a battery cell 100a, a first box body 10 and a second box body 20. The first box body 10 and the second box body 20 are connected to jointly form a closed space for accommodating the battery cell 100a. The first box body 10 includes a first side wall 11 and a bottom wall 12. The first side wall 11 is connected to the second box body 20. Along the circumference of the bottom wall 12, the first side wall 11 is a non-closed structure.

[0148] The first housing 10 and the second housing 20 are connected to each other to define an enclosed space for accommodating the battery cells 100a. The first housing 10 and the second housing 20 can be made of materials such as aluminum, an aluminum alloy, or stainless steel. The first housing 10 and the second housing 20 can be made of the same material to reduce the difficulty of connecting the first housing 10 and the second housing 20. For example, the first housing 10 and the second housing 20 can be made of an aluminum alloy. The first housing 10 and the second housing 20 can be connected by welding, bonding, or fasteners.

[0149] In the battery 100, the number of battery cells 100a can be one or more. Multiple battery cells 100a can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells 100a are connected in series and in parallel. Multiple battery cells 100a can be directly connected in series, in parallel, or in mixed connection, and then the whole composed of multiple battery cells 100a is accommodated in a closed space. The battery 100 may also include other structures. For example, the battery 100 may also include a busbar component for achieving electrical connection between multiple battery cells 100a. The battery cell 100a may be a secondary battery or a primary battery; the battery cell 100a may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto.

[0150] The bottom wall 12 is the main body of the first housing 10 and is disposed opposite the second housing 20. The thickness direction z of the bottom wall 12 can be the height direction of the battery 100. The first side wall 11 is a component disposed at the edge of the bottom wall 12 and protrudes from the bottom wall 12. The end of the first side wall 11 away from the bottom wall 12 can be connected to the second housing 20.

[0151] “The first side wall 11 is a non-closed structure” may mean that the first side wall 11 is not provided on a portion of the edge of the bottom wall 12 , so that the first side wall 11 is not closed at both ends, or in other words, the first side wall 11 is only provided on a portion of the edge of the bottom wall 12 .

[0152] In the above scheme, compared with the first side wall 11 being a closed structure, by setting the first side wall 11 as a non-closed structure, part of the side wall of the second box body 20 (corresponding to the part of the first box body 10 where the first side wall 11 is not provided) is directly connected to the bottom wall 12, so that the upper space of the part of the first box body 10 where the side wall is not provided is increased, and the interference of this part of the side wall of the first box body 10 on the battery cell in the enclosed space is reduced, that is, the interference of the draft angle on the battery cell 100a is overcome, and the utilization rate of the enclosed space is improved, so that more battery cells 100a can be accommodated, thereby improving the volume energy density of the battery 100.

[0153] According to some embodiments of the present application, the second box body 20 is connected to an edge of the bottom wall 12 where the first side wall 11 is not provided.

[0154] In some embodiments, the connection portion between the first box body 10 and the second box body 20 includes the first side wall 11 and the edge of the bottom wall 12 where the first side wall 11 is not provided. When the second box body 20 is connected to the edge of the first bottom wall 12 where the first side wall 11 is not provided, the area of ​​the bottom wall 12 can be effectively utilized to ensure that the volume of the enclosed space is larger.

[0155] In the above solution, the second box body 20 is connected to the edge of the bottom wall 12 where the first side wall 11 is not provided, which can increase the volume of the enclosed space as much as possible, so that the battery 100 has a higher volume energy density.

[0156] In some other embodiments, the second box body 20 may be connected to the non-edge position of the bottom wall 12 and the first side wall 11 , and may also form a closed space with the first box body 10 .

[0157] According to some embodiments of the present application, the bottom wall 12 includes a first area 12a and a second area 12b, the first area 12a and the second area 12b are arranged side by side along a first direction x, the first side wall 11 is arranged at the edge of the first area 12a, and the edge of the second area 12b is not provided with the first side wall 11, and the first direction x is perpendicular to the thickness direction z of the bottom wall 12.

[0158] Referring to Figure 4 , the first housing 10 is a square housing. The first direction x may be the length of the first housing 10. The first region 12a and the second region 12b are two regions disposed side by side along the length of the first housing 10. The first region 12a and the second region 12b may both be square. The edges of the first region 12a and the edges of the second region 12b together constitute the edges of the bottom wall 12. The edges of the first region 12a are all provided with the first sidewall 11, while the edges of the second region 12b are not provided with the first sidewall 11.

[0159] In the above scheme, along the first direction x, the edges of the second area 12b arranged side by side with the first area 12a are not provided with the first side wall 11, and the portion of the second box body 20 corresponding to the first area 12a is directly connected to the bottom wall 12, so that the space above the portion of the second area 12b without the side wall is increased, thereby improving the utilization rate of the enclosed space and thereby increasing the volume energy density of the battery 100 as much as possible.

[0160] In other embodiments, the first box body 10 may be circular or irregular in shape.

[0161] In other embodiments, the second area 12b may not be provided. When the first area 12a is square, the first sidewall 11 is not provided on one edge of the first area 12a, and the first sidewall 11 is provided on the remaining edges.

[0162] According to some embodiments of the present application, referring to FIG. 3 and FIG. 4 , the battery 100 further includes an electronic component 100 b , which is accommodated in a closed space and at least partially disposed in the second area 12 b , and the battery cell 100 a is disposed in the first area 12 a .

[0163] The electronic component 100b may be a component capable of monitoring the state of the battery 100 or regulating the state of the battery cell 100a. In some embodiments, the electronic component 100b includes but is not limited to a BMS (Battery Management System), a high-voltage box, or an inverter.

[0164] In some embodiments, the size of the electronic component 100b is smaller than that of the battery cell 100a. Therefore, part or all of the electronic component 100b can be placed in the portion of the enclosed space corresponding to the second area 12b to reasonably utilize the enclosed space.

[0165] In the above solution, by eliminating the side walls of the edge of the second area 12b, the space above the second area is increased. Therefore, smaller electronic components 100b are arranged in the second area 12b, which can reduce the encroachment of the electronic components 100b on the first area. In this way, more battery cells 100a can be placed in the first area 12a, thereby improving the volume energy density of the battery 100.

[0166] According to some embodiments of the present application, please refer to Figure 6, which is a top view of the first housing 10 in some embodiments of the present application. The first region 12a includes a first edge 120 and two second edges 121. The two second edges 121 are arranged opposite each other along a second direction y. The first edge 120 connects the two second edges 121. The first sidewall 11 is arranged between the first edge 120 and the two second edges 121. The second direction y is perpendicular to the thickness direction z of the bottom wall 12.

[0167] The second direction y is perpendicular to the thickness direction z of the bottom wall 12. In some embodiments, the second direction y can be the width direction of the first box body 10. Along the second direction y, the two second edges 121 are arranged opposite to each other, and the first edge 120 is located between the two second edges 121 and connects the two first edges 120, forming a U-shape. In some embodiments, the end of the second edge 121 away from the first edge 120 is connected to the edge of the second area 12b. "The first side wall 11 is provided at the first edge 120 and the two second edges 121" may refer to the first side wall 11 being provided at the three edges (the first edge 120 and the two second edges 121) of the first area 12a to form a U-shaped non-closed structure.

[0168] In the above solution, by arranging the first side wall 11 at the first edge 120 and the two second edges 121 , the structural strength of the first box 10 and the battery 100 can be ensured, so that the battery cell 100a has higher safety.

[0169] According to some embodiments of the present application, as shown in FIG. 4 , the two second edges 121 extend along the first direction x, and the first direction x, the second direction y, and the thickness direction z of the bottom wall 12 are perpendicular to each other.

[0170] In some embodiments, the first direction x can be the length direction of the first box body 10, the second direction y can be the width direction of the first box body 10, and the first direction x, the second direction y and the thickness direction z of the bottom wall 12 are perpendicular to each other to define the first box body 10 as a rectangular shape, that is, the first edge 120 corresponds to the short side of the first box body 10, and the second edge 121 corresponds to the long side of the first box body 10, or the second edge 121 is part of the long side.

[0171] In some embodiments, along the first direction x, the size of the first area 12a may be larger than the size of the second area 12b. By setting the first side wall 11 at the first edge 120 and the second edge 121, the first side wall 11 is set on most of the edges of the bottom wall 12 to effectively improve the structural strength of the first box body 10.

[0172] In the above solution, since the first direction x, the second direction y, and the thickness direction z of the bottom wall 12 are perpendicular to each other, the first box body 10 is a square box body (for example, the first box body 10 is a rectangular box body or a square box body). Compared with non-square boxes, the square box body can be manufactured more efficiently, thereby improving the manufacturing efficiency of the battery 100.

[0173] In other embodiments, the first direction x may not be perpendicular to the second direction y, and the first box 10 may be trapezoidal or have other shapes.

[0174] According to some embodiments of the present application, the length of the second edge 121 is greater than the length of the first edge 120 .

[0175] Please refer to FIG. 6 , in which L1 is used to show the length of the first edge 120 , and L2 is used to show the length of the second edge 121 , satisfying L2 > L1 .

[0176] The length of the second edge 121 may refer to the dimension of the second edge 121 in the first direction x, or the dimension of the second edge 121 in the direction in which it extends. The length of the first edge 120 may refer to the dimension of the first edge 120 in the second direction y, or the dimension of the first edge 120 in the direction in which it extends.

[0177] In the above solution, along the first direction x, the edge of the bottom wall 12 opposite to the first edge 120 is an edge without the first side wall 11 , so the edge with a smaller length of the bottom wall 12 is not provided with the first side wall 11 , which can improve the structural strength of the first box body 10 .

[0178] In some other embodiments, the length of the second edge 121 may also be less than or equal to the length of the first edge 120 .

[0179] According to some embodiments of the present application, referring to FIG. 5 , the first box body 10 further includes a first flange 13 , which extends outward from one end of the first side wall 11 away from the bottom wall 12 , and the first side wall 11 is connected to the second box body 20 via the first flange 13 .

[0180] “Extending outward” may mean that the first flange 13 extends toward the outside of the first box body 10 .

[0181] The first flange 13 may refer to a portion extending outward from an end of the first side wall 11 away from the bottom wall 12 and being horizontal or nearly horizontal so as to provide a larger contact surface for the second box body 20 .

[0182] In the above solution, by providing the first flange 13, the first side wall 11 and the second box body 20 can be conveniently and effectively connected, so that the first side wall 11 and the second box body 20 have a stable and sealed connection relationship, ensuring the safety of the battery cell 100a in the enclosed space.

[0183] According to some embodiments of the present application, please refer to Figures 4 and 5. Along the second direction y, the second area 12b exceeds the two second edges 121; the first box body 10 also includes a transition portion 14, and the end of the first flange 13 and the part of the second area 12b exceeding the second edge 121 are connected by the transition portion 14.

[0184] In the second direction y, the second region 12b protrudes beyond the two second edges 121 of the first region 12a, and the portion of the second region 12b protruding beyond the first region 12a is connected to the first flange 13 via the transition portion 14. That is, the end of the first flange 13 is connected to the portion of the second region 12b protruding beyond the first region 12a via the transition portion 14.

[0185] In some embodiments, the first flange 13 can be formed on the first side wall 11 by rolling, and the transition portion 14 can also be formed by rolling.

[0186] In the above scheme, along the second direction y, by setting the second area 12b to extend beyond the second edge 121 and setting the transition portion 14, the connection between the first flange 13 and the second area 12b is achieved, ensuring that the first box body 10 has a flat outer contour, which is convenient for connection with the second box body 20.

[0187] According to some embodiments of the present application, referring to FIG5 and FIG7 , FIG7 is a partial schematic diagram of the first box body 10 in some embodiments of the present application, the transition portion 14 is arranged obliquely relative to the bottom wall 12 .

[0188] The transition portion 14 is arranged obliquely relative to the bottom wall 12 , which may mean that the transition portion 14 is neither parallel to the bottom wall 12 nor perpendicular to the bottom wall 12 .

[0189] In the above solution, by arranging the transition portion 14 at an angle, the sealing between the first flange 13 and the second box body 20 can be improved, thereby ensuring the safety of the battery 100 .

[0190] In some embodiments, when a seal 60 is provided between the first box body 10 and the second box body 20 , the seal 60 has a portion corresponding to the transition portion 14 , which is located between the transition portion 14 and the second box body 20 , ensuring the sealing of the first box body 10 and the second box body 20 .

[0191] According to some embodiments of the present application, as shown in FIG7 , the inclination angle of the transition portion 14 relative to the bottom wall 12 is α, satisfying 0°<α≤60°.

[0192] In some embodiments, the value of α can be 1°, 2°, 3°, 4°, 5°…54°, 55°, 56°, 57°, 58°, 59° or 60°.

[0193] In the above solution, by setting the inclination angle of the transition portion 14 relative to the bottom wall 12 to no more than 60°, the risk of sealing failure between the second box body 20 and the first flange 13 is reduced, thereby ensuring the sealing of the first box body 10 and the second box body 20.

[0194] In some embodiments, the transition portion 14 has an inclination angle α relative to the bottom wall 12, satisfying 20°≤α≤40°. For example, the value of α can be 20°, 21°, 22°, 23°, 24°…34°, 35°, 36°, 37°, 38°, 39°, or 40°.

[0195] In some embodiments, the inclination angle α of the transition portion 14 relative to the bottom wall 12 is 25°.

[0196] In some embodiments, to ensure that the first flange 13 transitions smoothly to the second area 12 b and to ensure the sealing of the first box body 10 and the second box body 20 , the inclination angle α of the transition portion 14 relative to the bottom wall 12 may be 60°.

[0197] In other embodiments, the value of α may be or exceed 60°, such as 61°, 62°, or 63°.

[0198] According to some embodiments of the present application, referring to FIG. 3 in conjunction with FIG. 8 , which is an enlarged view of point B in FIG. 3 , the second housing 20 includes a top wall 21, a second side wall 22, and a second flange 23. The second side wall 22 is disposed at an edge of the top wall 21, and the second flange 23 extends outward from an end of the second side wall 22 away from the top wall 21. The second flange 23 includes a first portion 230, a second portion 231, and a third portion 232. The first portion 230 is connected to the edge of the bottom wall 12 where the first side wall 11 is not disposed, the second portion 231 is disposed corresponding to the transition portion 14, and the third portion 232 is connected to the first flange 13.

[0199] The top wall 21 may be the main body of the second box body 20 , and may be disposed opposite to the bottom wall 12 . The direction from the top wall 21 to the bottom wall 12 may be the height direction of the battery 100 .

[0200] The second side wall 22 can be arranged around the edge of the top wall 21 to form a closed structure, that is, the second side wall 22 is arranged around the edge of the top wall 21. Since the second side wall 22 is arranged around the edge of the top wall 21, a cavity is formed inside the second housing 20. When the second housing 20 and the first housing 10 are connected to each other, the cavity is part of the closed space.

[0201] When a portion of the second side wall 22 is connected to the edge of the bottom wall 12 where the first side wall 11 is not provided through the second flange 23, the draft angle of the second side wall 22 corresponding to the top wall 21 at this position is larger (larger than the draft angle of the portion of the second side wall 22 corresponding to the first side wall 11), and this position corresponds to the first area of ​​the bottom wall 12, so the space above the first area 12a is larger, and shorter components such as electronic components can be placed to rationally utilize the enclosed space and improve space utilization.

[0202] The second flange 23 may refer to a portion extending outward from an end of the second side wall 22 away from the top wall 21 and being horizontal or nearly horizontal so as to provide a larger contact surface for the first box body 10 .

[0203] 8 , the second flange 23 includes a first portion 230, a second portion 231, and a third portion 232. The first portion 230 is closer to the first housing 10 than the third portion 232, i.e., the first portion 230 protrudes toward the first housing 10 relative to the third portion 232, so as to be connected to the edge of the bottom wall 12 where the first side wall 11 is not provided. The third portion 232 is connected to the first flange 13. The second portion 231 is located between the first portion 230 and the third portion 232 and connects the first portion 230 and the third portion 232. The second portion 231 is provided corresponding to the transition portion 14 so as to be directly or indirectly connected to the transition portion 14. “Directly or indirectly connected to the transition portion 14” may mean that the second portion 231 can be directly bonded, welded, or connected to the transition portion 14 by fasteners, or it may mean that the second portion 231 is connected to the transition portion 14 via an intermediate component (such as a gasket).

[0204] In the above solution, the second housing 20 is connected to the edge of the bottom wall 12 not provided with the first side wall 11, the transition portion 14, and the first flange 13 via the second flange 23, ensuring the sealing between the first housing 10 and the second housing 20. Furthermore, the second side wall 22 is provided around the edge of the top wall 21 to form a chamber, thereby increasing the volume of the enclosed space and accommodating more battery cells 100a, resulting in a higher volumetric energy density for the battery 100.

[0205] In some embodiments, a through hole is provided on the first flange 13, a through hole is provided on the second flange 23, a through hole is provided on the transition portion 14, and a through hole is also provided at the position where the bottom wall 12 is connected to the second flange 23. When connecting the first box body 10 and the second box body 20, the first box body 10 and the second box body 20 can be fastened by passing fasteners (such as bolts) through the through holes.

[0206] In some embodiments, the cross section of the transition portion 14 may be arc-shaped to achieve a smooth transition between the first flange 13 and the bottom wall 12 and ensure molding quality.

[0207] In some embodiments, referring to FIG3 , when the first housing 10 is provided with a first flange 13 and the second housing 20 is provided with a second flange 23, a seal 60 may be provided between the first housing 10 and the second housing 20. The seal 60 is annular and is provided around the edge of the enclosed space to ensure sealing between the first flange 13 and the second housing 20, and to ensure sealing between the second flange 23 and the first housing 10. The seal 60 may be a rubber ring.

[0208] According to other embodiments of the present application, please refer to Figures 9 and 10. Figure 9 is a schematic diagram of the second box body 20 in other embodiments of the present application, and Figure 10 is an enlarged view of point C in Figure 9. The second box body 20 includes a top wall 21, a second side wall 22, and a second flange 23. The second side wall 22 is provided at a portion of the edge of the top wall 21, and the second flange 23 extends outward from an end of the second side wall 22 away from the top wall 21. The second flange 23 includes a first portion 230 and a second portion 231. The first portion 230 is connected to the edge of the bottom wall 12 where the first side wall 11 is not provided, and the second portion 231 is provided corresponding to the transition portion 14. The edge of the top wall 21 where the second side wall 22 is not provided is connected to the first flange 13.

[0209] The top wall 21 may be the main body of the second box body 20 , and may be disposed opposite to the bottom wall 12 . The direction from the top wall 21 to the bottom wall 12 may be the height direction of the battery 100 .

[0210] The second side wall 22 may be disposed around a portion of the edge of the top wall 21 and may be a non-closed structure. The second side wall 22 corresponds to the portion of the bottom wall 12 where the first side wall 11 is not disposed. The second flange 23 may be a portion extending outward from the end of the second side wall 22 away from the top wall 21 and being horizontal or nearly horizontal to provide a larger contact surface for the first housing 10.

[0211] The second flange 23 includes a first portion 230 and a second portion 231. The first portion 230 is connected to the edge of the bottom wall 12 where the first side wall 11 is not provided, and the second portion 231 is connected relative to the transition portion 14. The first flange 13 on the bottom wall 12 is directly connected to the plate-shaped top wall 21.

[0212] In the above embodiment, the main portion of the second housing 20 is plate-shaped, with a second sidewall 22 provided along a portion of its edge to correspond to the portion of the first housing 10 not provided with the first sidewall 11. This provides the advantages of a simple structure and low material costs. Furthermore, the second housing 20 connects the edge of the bottom wall 12 not provided with the first sidewall 11 to the transition portion 14 via a second flange 23, and the edge of the plate-shaped top wall 21 connects to the first flange 13. This ensures a tight seal between the first and second housings 10, 20, and thus the safety of the battery 100.

[0213] According to some embodiments of the present application, referring to FIG. 8 , the second portion 231 is tilted relative to the first portion 230 .

[0214] The second portion 231 is inclined relative to the first portion 230 , that is, the second portion 231 is inclined relative to the bottom wall 12 to correspond to the inclined transition portion 14 .

[0215] In the above solution, the second part 231 is arranged corresponding to the transition part 14. When the transition part 14 is arranged tilted, the connection stability and sealing between the second part 231 and the transition part 14 can be improved by tilting the second part 231, thereby ensuring the safety of the battery 100.

[0216] According to some embodiments of the present application, the second portion 231 and the transition portion 14 are parallel to each other.

[0217] “The second portion 231 and the transition portion 14 are parallel to each other” may mean that the second portion 231 and the transition portion 14 have the same inclination angle relative to the bottom wall 12 , or may mean that when the first box body 10 and the second box body 20 are connected, the second portion 231 is attached to the transition portion 14 .

[0218] In the above solution, the second portion 231 is parallel to the transition portion 14 to ensure that the second portion 231 can be effectively and tightly connected to the transition portion 14, ensuring the connection stability and sealing of the first box body 10 and the second box body 20, thereby ensuring the safety of the battery 100.

[0219] In other embodiments, the inclination angles of the second portion 231 and the transition portion 14 may be different. When the first box body 10 and the second box body 20 are connected, the second portion 231 may be connected to the transition portion 14 via an intermediate component such as a gasket.

[0220] According to some embodiments of the present application, the bottom wall 12 , the first side wall 11 , and the first flange 13 are integrally formed.

[0221] Integrally formed may mean that the first box body 10 is formed into the bottom wall 12 , the first side wall 11 and the first flange 13 through an integrally formed process using one structural member.

[0222] In the above solution, by integrally forming the first side wall 11 and the first flange 13 on the bottom wall 12 , the structural strength of the first box body 10 can be improved, ensuring that the battery cell 100 a is safely located in the enclosed space.

[0223] In some other embodiments, the bottom wall 12 , the first side wall 11 , and the first flange 13 may be connected to each other by welding or bonding.

[0224] According to some embodiments of the present application, the first box body 10 is formed by stamping, die-casting or bending.

[0225] The first side wall 11 and the first flange 13 can be formed on the bottom wall 12 by stamping, die-casting or bending.

[0226] In the above solution, the first housing 10 is manufactured by stamping, die-casting or bending, which can make the first housing 10 have a higher manufacturing efficiency, and thus make the battery 100 have a higher manufacturing efficiency.

[0227] According to some embodiments of the present application, referring to Figures 3 and 5 , the battery 100 includes a flow channel 30 (see Figure 12 ) for accommodating a heat exchange medium to regulate the temperature of the battery cell 100a. The battery 100 also includes an inlet pipe 31 and an outlet pipe 32 , both of which are connected to the flow channel 30 and are located outside the enclosed space (see Figure 2 ).

[0228] The flow channel 30 refers to a portion that can accommodate and enable the flow of heat exchange medium.

[0229] The heat exchange medium can be a fluid (liquid) or a gas. Temperature regulation involves exchanging heat with the battery cell 100a, absorbing heat from the battery cell 100a to cool it, or providing heat to the battery cell 100a to heat it. Alternatively, the fluid can be water, a mixture of water and ethylene glycol, or air.

[0230] The inlet pipe 31 and the outlet pipe 32 are components that connect to the flow channel 30. The inlet pipe 31 and the outlet pipe 32 can be connected to external pipes, respectively, so that the heat exchange medium enters the flow channel 30 through the inlet pipe 31 and is discharged from the flow channel 30 through the outlet pipe 32. In some embodiments, after the battery 100 is assembled in the electrical equipment, the external pipes can be connected to the inlet pipe 31 and the outlet pipe 32 by plugging and unplugging.

[0231] In the above solution, the flow channel 30 is provided to regulate the temperature of the battery cell 100a, thereby reducing the risk of thermal runaway of the battery 100 and improving the safety of the battery 100. Furthermore, the inlet pipe 31 and the outlet pipe 32 are arranged outside the enclosed space, making it easy to connect external pipes to the inlet pipe 31 and the outlet pipe 32 to achieve circulation of the heat exchange medium.

[0232] According to some embodiments of the present application, the inlet pipe 31 and the outlet pipe 32 are both located on a side of the bottom wall 12 facing the second box body 20 .

[0233] “The inlet pipe 31 and the outlet pipe 32 are both located on the side of the bottom wall 12 facing the second box body 20 ” may mean that along the height direction of the battery 100 , the inlet pipe 31 and the outlet pipe 32 are arranged toward the second box body 20 .

[0234] In the above scheme, the inlet pipe 31 and the outlet pipe 32 are both arranged toward the side of the bottom wall 12 facing the second box body 20, so as to rationally utilize the height space of the battery 100 and realize the plugging and unplugging of the external pipes and the inlet pipe 31 and the outlet pipe 32. Compared with the scheme in which the inlet pipe 31 and the outlet pipe 32 are arranged horizontally, the lateral dimension of the battery 100 that is additionally set due to the plugging and unplugging of the external pipes can be reduced, thereby streamlining the volume of the entire battery 100 and achieving the purpose of improving the energy density of the battery 100.

[0235] In some other embodiments, the inlet pipe 31 and the outlet pipe 32 may also be located on a side of the bottom wall 12 away from the second box body 20 .

[0236] According to some embodiments of the present application, along the direction of the bottom wall 12 pointing to the second box body 20 , the inlet pipe 31 and the outlet pipe 32 do not extend beyond the second box body 20 .

[0237] The direction along the bottom wall 12 pointing to the second box body 20 may be the height direction of the battery 100. In the height direction of the battery 100, the inlet pipe 31 and the outlet pipe 32 do not exceed the second box body 20.

[0238] In the above solution, the inlet pipe 31 and the outlet pipe 32 are arranged not to exceed the second box body 20 to ensure that the insertion and removal positions of the inlet pipe 31 and the outlet pipe 32 and the external pipeline are within the height range of the battery 100.

[0239] According to some embodiments of the present application, referring to FIG. 5 , the inlet pipe 31 and the outlet pipe 32 are both arranged obliquely or vertically relative to the bottom wall 12 .

[0240] Both the inlet pipe 31 and the outlet pipe 32 are arranged at an angle or perpendicularly relative to the bottom wall 12, which may mean that the axes of the inlet pipe 31 and the outlet pipe 32 are arranged at an angle or perpendicularly relative to the bottom wall 12. When plugging and unplugging the external pipe, at least part of the direction of the plugging and unplugging force is along the height direction of the battery 100.

[0241] In the above scheme, the inlet pipe 31 and the outlet pipe 32 are arranged at an angle or perpendicular to the bottom wall 12 in the direction of plugging and unplugging of the external pipeline, so that the height space of the battery 100 can be reasonably utilized to achieve plugging and unplugging without occupying additional space, thereby ensuring that the battery 100 has a higher volume energy density.

[0242] According to some embodiments of the present application, please refer to Figure 11, which is an enlarged view of point D in Figure 3. The second housing 20 includes a top wall 21, a second side wall 22, and a second flange 23. The second side wall 22 is disposed at the edge of the top wall 21, and the second flange 23 extends outward from the end of the second side wall 22 away from the top wall 21. The second flange 23 is provided with a first avoidance portion 233 and a second avoidance portion 234 (see Figure 8). The inlet pipe 31 and the outlet pipe 32 pass through the first avoidance portion 233 and the second avoidance portion 234, respectively.

[0243] The first escape portion 233 is provided on the second flange 23 to allow for the passage of the inlet pipe 31. When the first housing 10 and the second housing 20 are connected, the inlet pipe 31 can pass through the first escape portion 233 without compromising the seal between the second flange 23 and the first housing 10. The second escape portion 234 is provided on the second flange 23 to allow for the passage of the outlet pipe 32. When the first housing 10 and the second housing 20 are connected, the outlet pipe 32 can pass through the second escape portion 234 without compromising the seal between the second flange 23 and the first housing 10.

[0244] In some embodiments, a seal 60 is provided between the first flange 13 and the second flange 23 . Since the second flange 23 is provided with a first avoidance portion 233 and a second avoidance portion 234 , the seal 60 may be provided with a corresponding avoidance structure.

[0245] In the above solution, the provision of the second flange 23 improves the sealing between the first and second housings 10 and 20, ensuring the tightness of the battery 100. To avoid the situation where the second flange 23 is adjusted toward the enclosed space to accommodate the inlet and outlet pipes 31 and 32, resulting in a reduction in the volume of the enclosed space, a first and second relief portions 233 and 234 are provided to respectively accommodate the inlet and outlet pipes 31 and 32, thereby ensuring that the volume of the enclosed space is not affected and enabling the battery 100 to have a higher energy density.

[0246] According to some embodiments of the present application, the first avoidance portion 233 and the second avoidance portion 234 are notches provided on the edge of the second flange 23 .

[0247] Referring to FIG. 11 , FIG. 11 shows a first avoidance portion 233 . The first avoidance portion 233 is recessed inward from the edge of the second flange 23 to form a gap that allows the inlet pipe 31 to pass through.

[0248] In the above solution, the first avoidance portion 233 and the second avoidance portion 234 are notches formed on the edge of the second flange 23 , and their formation is simple and convenient.

[0249] In some other embodiments, the first avoidance portion 233 and the second avoidance portion 234 may be through holes provided on the edge of the second flange 23 .

[0250] According to some embodiments of the present application, referring to Figures 5 and 12, Figure 12 is a partial cross-sectional view of the first housing 10 in some embodiments of the present application, a flow channel 30 is formed inside the bottom wall 12, and an inlet pipe 31 and an outlet pipe 32 are both disposed at the edge of the bottom wall 12 where the first side wall 11 is not disposed.

[0251] A flow channel 30 is formed inside the bottom wall 12 , which may mean that the bottom wall 12 is integrated with the flow channel 30 . The bottom wall 12 may not only serve as a component for supporting the battery cell 100 a , but also serve as a component for accommodating a heat exchange medium to adjust the temperature of the battery cell 100 a .

[0252] The inlet pipe 31 and the outlet pipe 32 are both provided with the bottom wall 12 to communicate with the flow channel 30 inside the bottom wall 12 .

[0253] 5 , the inlet pipe 31 and the outlet pipe 32 may be disposed in the second region 12b. In some embodiments, the inlet pipe 31 and the outlet pipe 32 may be disposed at an edge of the second region 12b.

[0254] In the above solution, the flow channel 30 is arranged inside the bottom wall 12. By arranging the inlet pipe 31 and the outlet pipe 32 at the edge of the bottom wall 12 where the first side wall 11 is not provided, the first side wall 11 can be reasonably avoided, thereby preventing the inlet pipe 31 and the outlet pipe 32 from interfering with the first side wall 11, reducing the difficulty of assembling the battery 100, and improving the manufacturing efficiency of the battery 100.

[0255] According to some embodiments of the present application, the connection between the inlet pipe 31 and the bottom wall 12 and the connection between the outlet pipe 32 and the bottom wall 12 are both located outside the closed space.

[0256] 4 and 5 , the inlet pipe 31 and the outlet pipe 32 are both straight pipes.

[0257] “The connection between the inlet pipe 31 and the bottom wall 12 and the connection between the outlet pipe 32 and the bottom wall 12 are both located outside the closed space” means that the inlet pipe 31 and the outlet pipe 32 are not in the closed space.

[0258] In the above solution, the connection between the inlet pipe 31 and the bottom wall 12, and the connection between the outlet pipe 32 and the bottom wall 12 are arranged outside the closed space, which can avoid opening holes in the first box body 10 or the second box body 20 to lead the inlet pipe 31 and the outlet pipe 32 to the outside of the closed space. Therefore, the sealing process of the openings can be reduced, thereby ensuring the sealing of the battery 100 and reducing the difficulty of assembling the battery 100.

[0259] In some other embodiments, the inlet pipe 31 and the outlet pipe 32 can be curved pipes, and the connection between the inlet pipe 31 and the bottom wall 12 and the connection between the outlet pipe 32 and the bottom wall 12 are both located in the closed space. The open ends of the inlet pipe 31 and the outlet pipe 32 can pass through the first box body 10 or the second box body 20 to be exposed outside the closed space to achieve plugging and unplugging with external pipes.

[0260] According to some embodiments of the present application, as shown in FIG. 4 , the inlet pipe 31 and the outlet pipe 32 are respectively disposed at two corners of the bottom wall 12 .

[0261] The corner of the bottom wall 12 may refer to the corner position of two adjacent sides of the bottom wall 12 .

[0262] In the above solution, the inlet pipe 31 and the outlet pipe 32 are arranged at the corners of the bottom wall 12, which can avoid the inlet pipe and the outlet pipe from encroaching on the closed space and ensure that the battery has a higher energy density.

[0263] In some embodiments, referring to FIG. 4 , the inlet pipe 31 and the outlet pipe 32 are disposed at two corners of the bottom wall 12 , and the first and second relief portions 233 , 234 corresponding to the inlet and outlet pipes 31 and 32 are disposed at the corners of the second flange 23 . Corresponding relief structures for the inlet and outlet pipes 31 and 32 are also disposed at the corners of the sealing member 60 .

[0264] The second flange 23 is larger at its corners than at its non-corner locations. To address this, notches or through-holes are provided at the corners to form first and second relief portions 233 and 234, reducing the impact of these notches or through-holes on the seal. Similarly, the seal 60 is larger at its corners than at its non-corner locations. To address this, notches or through-holes are provided at the corners to form relief structures, reducing the impact of these notches or through-holes on the seal.

[0265] In the above solution, the inlet pipe 31 and the outlet pipe 32 are respectively disposed at the two corners of the bottom wall 12, so that the first avoidance portion 233 and the second avoidance portion 234 are formed at the corners of the second flange 23. Because the area of ​​the corner portion of the second flange 23 is larger than that of other portions, the impact of the formation of the first avoidance portion 233 and the second avoidance portion 234 on the second flange 23 is reduced, thereby ensuring the stability and sealing of the connection between the second flange 23 and the first housing 10.

[0266] According to some embodiments of the present application, see Figures 12 and 13 . Figure 13 is a schematic diagram of the second substrate 16 in some embodiments of the present application. The bottom wall 12 includes a first substrate 15 and a second substrate 16 stacked together. The second substrate 16 is disposed on a side of the first substrate 15 facing away from the second housing 20. A flow channel 30 is formed between the second substrate 16 and the first substrate 15.

[0267] Along the thickness direction z of the bottom wall 12, the first base plate 15 and the second base plate 16 are stacked, forming a flow channel 30 for accommodating the heat exchange medium therebetween. The first base plate 15 is closer to the second housing 20 than the second base plate 16. The inlet pipe 31 and the outlet pipe 32 can be disposed on the surface of the first base plate 15 facing away from the second base plate 16 and communicate with the flow channel 30.

[0268] The first substrate 15 and the second substrate 16 may be connected to each other by bonding or welding.

[0269] In the above solution, the first substrate 15 and the second substrate 16 are stacked to form the flow channel 30 , so that the bottom wall 12 has a simple structure and is easy to manufacture.

[0270] According to some embodiments of the present application, referring to FIG. 12 , the first sidewall 11 is connected to the first substrate 15 .

[0271] In some embodiments, the first sidewall 11 may be integrally formed with the first substrate 15 .

[0272] In some embodiments, the first substrate 15 is plate-shaped, and the first side wall 11 is formed on the first substrate 15 by rolling, stamping, or bending, so that the first substrate 15 has strong structural strength and can be easily connected to the second box 20. In some embodiments, the first side wall 11 can be connected to the first substrate 15 by bonding or welding.

[0273] In the above solution, the first substrate 15 is closer to the second box 20 than the second substrate 16 , so disposing the first side wall 11 on the first substrate 15 can facilitate connecting the first box 10 and the second box 20 , reducing the difficulty of assembling the battery 100 .

[0274] In some other embodiments, the first sidewall 11 may be connected to the second substrate 16 .

[0275] According to some embodiments of the present application, a groove 160 is formed on a surface of the second substrate 16 facing the first substrate 15 , and a surface of the first substrate 15 facing the first substrate 15 and the groove 160 together form a flow channel 30 .

[0276] The surface of the second substrate 16 facing the first substrate 15 can be the inner wall surface of the bottom wall 12. A groove 160 is provided on the inner wall surface to form a flow channel 30 for the heat exchange medium to flow, thereby achieving temperature regulation of the battery cell 100a. In some embodiments, the surface of the first substrate 15 facing the second substrate 16 can be a flat surface. In other embodiments, the surface of the first substrate 15 facing the second substrate 16 can also be provided with a groove 160, which is arranged opposite the groove 160 on the second substrate 16. To ensure that the first substrate 15 can stably support the battery cell 100a, the surface of the first substrate 15 facing away from the second substrate 16 can be a flat surface.

[0277] 13 , the grooves 160 on the second substrate 16 can be arranged in a circuitous manner on the second substrate 16 according to design requirements, so as to enable the heat exchange medium to fully exchange heat with the battery cell 100 a .

[0278] In the above solution, the groove 160 is formed on the surface of the second substrate 16 to enclose the flow channel 30 together with the first substrate 15 , so that the heat exchange medium can effectively regulate the temperature of the battery cell 100 a and improve the safety of the battery 100 .

[0279] According to other embodiments of the present application, the battery 100 further includes a thermal management component, the flow channel 30 is disposed in the thermal management component, the thermal management component is disposed in a closed space, and the inlet pipe 31 and the outlet pipe 32 are both disposed in the thermal management component.

[0280] A flow channel 30 is formed inside the thermal management component. The flow channel 30 contains a heat exchange medium to regulate the temperature of the battery cell 100a, so that the battery 100 is within a suitable temperature range, ensuring that the battery 100 has a high safety. For example, when cooling or reducing the temperature of the battery cell 100a, the thermal management component is used to contain a cooling fluid to reduce the temperature of multiple battery cells 100a. In this case, the thermal management component can also be referred to as a cooling component, cooling system, or cooling plate, and the fluid it contains can also be referred to as a cooling medium or cooling fluid, more specifically, it can be referred to as a coolant or cooling gas. When the fluid contained in the thermal management component is cooling water, the thermal management component can also be referred to as a water-cooled plate. The water-cooled plate contacts the battery cell 100a and can be used to reduce the temperature of the battery cell 100a to prevent thermal runaway of the battery cell 100a. In some cases, the heat exchange medium can be heated to achieve heating of the battery cell 100a so that the battery 100 is within a suitable temperature range.

[0281] In the above solution, a thermal management component is provided to adjust the temperature of the battery cell 100 a , so that the battery 100 has higher safety.

[0282] When the flow channel 30 in the battery 100 is set in the thermal management component, the main body of the thermal management component can be located in the enclosed space, and a portion of the thermal management component can pass through the first box body 10 or the second box body 20 to achieve the inlet pipe 31 and the outlet pipe 32 being located outside the enclosed space, or the thermal management component is located in the enclosed space, and the inlet pipe 31 and the outlet pipe 32 pass through the first box body 10 or the second box body 20 to be located outside the enclosed space.

[0283] According to some embodiments of the present application, please refer to Figures 14 and 15. Figure 14 is a schematic diagram of the first box body 10 and the frame 40 in some embodiments of the present application, and Figure 15 is a three-dimensional exploded diagram of the first box body 10 and the frame 40 in some embodiments of the present application.

[0284] The battery 100 further includes a frame 40 . The frame 40 is disposed on a side of the first box body 10 facing away from the second box body 20 . The frame 40 is used to support the first box body 10 .

[0285] The frame 40 is a component disposed on the side of the first housing 10 facing away from the second housing 20. The frame 40 supports the first housing 10 to bear the weight of the first housing 10, the battery cells 100a, and the second housing 20. In some embodiments, the structural strength of the frame 40 is no less than that of the first housing 10 to ensure that it can effectively support the first housing 10, the battery cells 100a, and the second housing 20.

[0286] In the above solution, the frame 40 is provided to support the first box body 10 , thereby ensuring that the battery 100 has a high structural strength and the safety of the battery 100 is ensured.

[0287] According to some embodiments of the present application, please refer to Figures 16 and 17. Figure 16 is a partial cross-sectional view of the side beam 41 and the first box body 10 in some embodiments of the present application, and Figure 17 is a partial cross-sectional view of the frame 40 in some embodiments of the present application. The first box body 10 also includes a first flange 13, which extends outward from an end of the first side wall 11 away from the bottom wall 12. The first side wall 11 is connected to the second box body 20 via the first flange 13. The frame 40 includes a side beam 41, which is arranged along the first flange 13 and overlaps the side beam 41.

[0288] Please refer to Figure 12. Setting the first side wall 11 on the bottom wall 12 will make the first box body 10 have a certain height. The plane where the first flange 13 is located can be regarded as the highest position of the first box body 10. Since the first flange 13 extends to the outside of the first box body 10, the first flange 13, the first side wall 11 and the bottom wall 12 will jointly define a space with a certain height. For this purpose, the space can be reasonably utilized, that is, at least part of the side beam 41 can be set in the space and support the first flange 13 to prevent the overall height of the battery 100 from being too large due to the setting of the frame 40, resulting in the center of gravity of the battery 100 being too high.

[0289] In the above solution, the edge is arranged along the flange of the first box body 10, and the first flange 13 is supported to rationally utilize the height space existing due to the arrangement of the first flange 13 and the first side wall 11 of the first box body 10, thereby ensuring that the battery 100 has a lower center of gravity and making the battery 100 have higher stability.

[0290] According to some embodiments of the present application, referring to FIG. 16 , a first cavity 41 a is formed between the first side wall 11 and the side beam 41 .

[0291] The first flange 13 overlaps the side beam 41, and a gap is formed between the first side wall 11 and the side beam 41 to define a first cavity 41a. When the side of the battery 100 is impacted, the impact force causes the side beam 41 to deform toward the first cavity 41a, thereby absorbing the impact energy and preventing damage to the battery cells 100a within the battery 100.

[0292] In the above solution, the first cavity 41 a formed by the first side wall 11 and the side beam 41 can collapse and absorb energy after the battery 100 is impacted, thereby improving the impact resistance of the battery 100 and making the battery 100 safer.

[0293] In other embodiments, the first cavity 41 a may not exist between the first side wall 11 and the side beam 41 , and the first side wall 11 may be in surface contact with the side beam 41 to ensure the compactness of the battery 100 .

[0294] According to some embodiments of the present application, with reference to Figures 16 and 17 , the edge beam 41 includes a first support surface 410 and a second support surface 411 . Along the thickness direction z of the bottom wall 12 , the first support surface 410 protrudes from the second support surface 411 . The first flange 13 overlaps the first support surface 410 , and the bottom wall 12 overlaps the second support surface 411 .

[0295] Taking the battery 100 as a reference, the first support surface 410 and the second support surface 411 are arranged side by side in the direction from the outside of the battery 100 to the inside of the battery 100. The first support surface 410 supports the first flange 13, and the second support surface 411 supports the bottom wall 12. The first support surface 410 can be connected to the first flange 13 via fasteners, and the second support surface 411 can be connected to the bottom wall 12 via fasteners.

[0296] In the height direction of the battery 100 , the bottom wall 12 is below the first flange 13 . To ensure that the side beam 41 supports the first box body 10 , the first support surface 410 is higher than the second support surface 411 , that is, the first support surface 410 protrudes from the second support surface 411 .

[0297] Referring to FIG. 17 , in some embodiments, the transverse dimension of the second support surface 411 is D, satisfying D ≥ 10 mm, such as D is 10 mm, 11 mm, 12 mm, or 13 mm. The transverse dimension of the second support surface 411 refers to the dimension along the width direction of the side beam 41 (the width direction of the side beam 41 can be understood as the direction from the outside of the battery 100 to the inside of the battery 100), that is, the support dimension of the second support surface 411 on the bottom wall 12 in the direction from the outside of the battery 100 to the inside of the battery 100. By limiting D ≥ 10 mm, effective support for the first box body 10 can be guaranteed, and the side beam 41 and the first box body 10 can be prevented from being locally subjected to excessive force, thereby preventing damage to the side beam 41 and the first box body 10.

[0298] In the above solution, the first flange 13 is supported by the first supporting surface 410 , and the bottom wall 12 is supported by the second supporting surface 411 , so as to ensure that the side beam 41 supports the first box body 10 and ensure that the battery 100 has a high structural strength.

[0299] According to some embodiments of the present application, as shown in FIG17 , a second cavity 41 b is formed inside the side beam 41 .

[0300] The second cavity 41b formed within the side beam 41 indicates that the side beam 41 is a hollow structure. Its interior is hollow, and it has the function of collapsing and absorbing energy after an impact. In some embodiments, the number of second cavities 41b within the side beam 41 may not be one, but may be multiple, such as two, three, or four second cavities 41b spaced apart.

[0301] In the above solution, the second cavity 41b formed inside the side beam 41 can collapse and absorb energy after the battery 100 is impacted, thereby improving the impact resistance of the battery 100 and making the battery 100 safer.

[0302] In other embodiments, the side beam 41 may be a solid structure without a cavity inside.

[0303] According to some embodiments of the present application, the side beam 41 is formed by bending a plate-shaped component.

[0304] In some embodiments, the side beam 41 can be formed by bending a plate-shaped component, such as a steel plate, using a bending machine.

[0305] In the above solution, the side beam 41 is formed by bending a plate-like component, which can improve the manufacturing efficiency of the side beam 41 and ensure the manufacturing efficiency of the battery 100; at the same time, since the side beam 41 is bent and formed in one piece, it does not require welding and assembly, thereby ensuring the structural stability of the side beam 41.

[0306] In some other embodiments of the present application, the side beam 41 may be integrally formed by a rolling process, such as a steel plate being formed into the side beam 41 by a rolling press.

[0307] In other embodiments of the present application, the side beam 41 may be formed by welding or bonding a plurality of plate-like members or rod-like members to each other.

[0308] According to some embodiments of the present application, referring to FIG. 17 , a second cavity 41 b is formed inside the side beam 41. The side beam 41 includes a first connecting wall 412 bent relative to the first support surface 410 and a second connecting wall 413 bent relative to the second support surface 411. The first connecting wall 412 and the second connecting wall 413 are stacked and welded together.

[0309] As shown in Figure 17, the side beam 41 includes a first support surface 410, a second support surface 411, a first connecting wall 412, a second connecting wall 413, a bottom edge 414, a first connecting side edge 415, and a second connecting side edge 416. The bottom edge 414 is disposed opposite the first support surface 410 and the second support surface 411 along the height direction of the battery 100. The first connecting side edge 415 is bent at the bottom edge 414 and connected to the first support surface 410, while the second connecting side edge 416 is bent at the bottom edge 414 and connected to the second support surface 411.

[0310] In some embodiments, the first connecting wall 412 is bent toward the bottom edge 414 on the first support surface 410, and the second connecting wall 413 is bent toward the first support surface 410 away from the bottom edge 414. In other embodiments, the first connecting wall 412 is bent toward the first support surface 410 away from the bottom edge 414, and the second connecting wall 413 is bent toward the first support surface 410 toward the bottom edge 414. In other embodiments, both first connecting walls 412 are bent toward the same direction, such as toward the bottom edge 414 or away from the bottom edge 414.

[0311] The first connecting wall 412 and the second connecting wall 413 are stacked and welded together, so that the side beam 41 has a closed structure with a second cavity 41 b inside, and the side beam 41 has good structural stability.

[0312] In the above solution, by stacking and welding the first connecting wall 412 bent on the first supporting surface 410 and the second connecting wall 413 bent on the second supporting surface 411, the structural strength of the side beam 41 can be improved to ensure the supporting effect on the first box body 10.

[0313] According to some embodiments of the present application, as shown in Figure 17, the end of at least one of the first connecting wall 412 and the second connecting wall 413 includes an extension section 417, which extends into the second cavity 41b and abuts against the bottom edge 414 of the side beam 41, and the bottom edge 414 is arranged opposite to the first support surface 410 and the second support surface 411.

[0314] The extension section 417 refers to a structure formed on the first connecting wall 412 and / or the second connecting wall 413 . The extension section 417 is located in the second cavity 41 b and can form surface contact with the bottom edge 414 and abut against the bottom edge 414 .

[0315] In some embodiments of the present application, in the height direction of the battery 100, the first connecting wall 412 is larger than the second connecting wall 413. The first connecting wall 412 is bent toward the bottom edge 414, while the second connecting wall 413 is bent away from the bottom edge 414. The second connecting wall 413 abuts and is welded to the surface of the first connecting wall 412. An extension section 417 is provided at the end of the second connecting wall 413. The extension section 417 is parallel to the bottom edge 414 and fits and abuts the bottom edge 414. Referring to FIG. 17 , the first connecting wall 412 and the extension section 417 divide the second cavity 41b into two sub-cavities.

[0316] According to some embodiments of the present application, the extension section 417 abuts against the middle area of ​​the bottom edge 414 .

[0317] In the above solution, the extension section 417 abuts against the middle area of ​​the bottom edge 414 so that the bottom edge 414 is evenly stressed, ensuring that the side beam 41 has a stable structure to effectively support the first box body 10 .

[0318] According to some embodiments of the present application, the extension section 417 is welded to the bottom edge 414 .

[0319] In the above solution, the extension section 417 is connected to the bottom edge 414 by welding, so that the side beam 41 has a stable structure and effectively supports the first box body 10 .

[0320] In other embodiments, the extension section 417 may be bonded or connected to the bottom edge 414 via fasteners.

[0321] According to some embodiments of the present application, the cross section of the side beam 41 is L-shaped.

[0322] The side beam 41 has an L-shaped cross section, meaning that the side beam 41 has a surface that supports the first flange 13 and a surface that supports the bottom wall 12. Since the first flange 13 is higher than the bottom wall 12, the side beam 41 with an L-shaped cross section can effectively support the first box body 10.

[0323] According to some embodiments of the present application, please refer to Figure 18, which is a schematic diagram of the side beam 41 in some embodiments of the present application.

[0324] The side beam 41 includes a first side beam 41 c and two second side beams 41 d . The two second side beams 41 d are arranged opposite to each other along a second direction y. The first side beam 41 c connects the two second side beams 41 d . The second direction y is perpendicular to the thickness direction z of the bottom wall 12 .

[0325] As shown in Figure 18 , the side beam 41 is U-shaped. Referring to Figure 4 , the first side beam 41c corresponds to the first edge 120, and the two second side beams 41d correspond to the two second edges 121. The second direction y may be the width of the first housing 10. The first support surface 410 of the first side beam 41c can support the first flange 13 corresponding to the first edge 120, while the first support surface 410 of the second side beam 41d can support the first flange 13 corresponding to the second edge 121.

[0326] In some embodiments, the first side beam 41c and the second side beam 41d can be manufactured separately and then connected together by welding or bonding. For example, the first side beam 41c and the second side beam 41d can be manufactured by rolling and then connected together by welding.

[0327] In the above solution, the first side beam 41c and the second side beam 41d are respectively arranged to correspond to the first edge 120 and the second edge 121 of the first box body 10 to ensure that the side beam 41 supports the first box body 10 and ensures that the battery 100 has high safety.

[0328] According to some embodiments of the present application, referring to FIG. 15 , the frame 40 further includes a first bracket 42 , and the first bracket 42 connects the two second side beams 41 d .

[0329] The first bracket 42 is a component that connects the two second side beams 41d to improve the structural strength of the side beam 41. The first bracket 42 and the side beam 41 can be made of the same material. The first bracket 42 can be connected to the two second side beams 41d by welding, bonding, or fasteners.

[0330] In some embodiments, a plurality of through holes are formed on the surface of the first bracket 42, and a plurality of through holes are correspondingly formed on the second side beam 41d. The first bracket 42 is connected to the second side beam 41d by a plurality of fasteners passing through the through holes to ensure the connection stability between the first bracket 42 and the second side beam 41d.

[0331] In the above solution, by providing the first bracket 42 to connect the two second side beams 41 d , the structural strength of the frame 40 can be improved, and the first box body 10 can be effectively supported.

[0332] According to some embodiments of the present application, the first bracket 42 and the first side beam 41 c are spaced apart along the first direction x, and the first direction x, the second direction y and the thickness direction z of the bottom wall 12 are perpendicular to each other.

[0333] 15 , the first bracket 42 and the first side beam 41 c can both extend along the second direction y and be spaced apart along the first direction x. The first direction x and the second direction y are perpendicular to each other. The first direction x can be the length direction of the first box body 10, and the second direction y can be the width direction of the second box body 20.

[0334] In the above solution, along the first direction x, the first bracket 42 and the second side beam 41d are spaced apart and both are connected to the second side beam 41d, which can effectively improve the structural strength of the frame 40 and ensure that the battery 100 has higher safety.

[0335] According to some embodiments of the present application, the first bracket 42 is connected to ends of the two second side beams 41 d away from the first side beam 41 c .

[0336] 15 , the first bracket 42 fixes the end of the second side beam 41 d away from the first side beam 41 c , constraining the end of the second side beam 41 d to ensure the structural stability of the frame 40 .

[0337] In the above solution, the first bracket 42 is connected to the ends of the two second side beams 41d away from the first side beam 41c, which can effectively improve the structural strength of the frame 40 and ensure that the first side beam 41c and the second side beam 41d can effectively support the first box body 10.

[0338] In some embodiments, as shown in FIG15 , there are two first brackets 42 , and the two first brackets 42 are spaced apart along the first direction x, wherein one first bracket 42 is connected to the ends of the two second side beams 41 d away from the first side beam 41 c , and the other first bracket 42 is connected to the middle of the two second side beams 41 d .

[0339] In some embodiments, as shown in FIG14 , the dimensions of the first bracket 42 at both ends in the second direction y are larger than the dimensions of the middle portion of the first bracket 42. That is, protrusions 42a are formed at both ends of the first bracket 42. The protrusions 42a are larger in the first direction x and protrude from the middle portion of the first bracket 42. The portion of the protrusions 42a protruding from the middle portion may correspond to the first region 12a. The protrusions 42a may protrude toward the first region 12a to support the bottom surface of the bottom wall 12 corresponding to the first region 12a.

[0340] In some embodiments, as shown in FIG16 , the first bracket 42 has a first supporting edge 42b and a second supporting edge 42c, wherein the first supporting edge 42b protrudes from the second supporting edge 42c, the first supporting edge 42b corresponds to the bottom wall 12, and the second supporting edge 42c is supported by the bottom edge 414 of the side beam 41. The first supporting edge 42b corresponding to the bottom wall 12 may mean that the first supporting edge 42b is in contact with the bottom wall 12, or that there is a gap between the first supporting edge 42b and the bottom wall 12.

[0341] According to some embodiments of the present application, referring to FIG. 14 and FIG. 15 , the battery 100 further includes a crossbeam 50 . The crossbeam 50 is disposed on the bottom wall 12 and divides the enclosed space into a plurality of accommodation spaces.

[0342] 15 , a crossbeam 50 is provided on the bottom wall 12 , extending along the second direction y and dividing the enclosed space into a plurality of accommodation spaces along the first direction x. The crossbeam 50 can also enhance the structural strength of the first box body 10 .

[0343] In conjunction with Figure 14, the number of beams 50 is three, and the three beams 50 are arranged at intervals along the first direction x. One beam 50 at the edge is arranged corresponding to the first edge 120, and the other beam 50 at the edge is arranged corresponding to the junction of the first area 12a and the second area 12b. The beam 50 in the middle divides the second area 12b into two sub-areas. The battery cell 100a can be arranged in the two sub-areas, and the electronic components 100b of the battery 100 can be arranged in the first area 12a.

[0344] The crossbeam 50 can also be used as a mounting beam, that is, the battery cell 100 a can be fixed in the closed space by the crossbeam 50 .

[0345] In the above solution, the enclosed space is divided into a plurality of accommodating spaces by providing the crossbeams 50 , so as to reasonably arrange the battery cells 100 a and the electronic components 100 b and ensure the safety of the battery cells 100 a .

[0346] According to some embodiments of the present application, referring to FIG. 15 , a through hole is formed in the bottom wall 12 , and the first bracket 42 is connected to the crossbeam 50 via a fastener passing through the through hole.

[0347] The through-holes are holes extending along the thickness direction z of the bottom wall 12, extending through two opposing surfaces of the bottom wall 12. In some embodiments, when a flow channel 30 is formed within the bottom wall 12, the through-holes can be positioned away from the flow channel 30 to prevent leakage of the heat exchange medium within the flow channel 30. The fasteners can be sealed rivet nuts to ensure a seal between the crossbeam 50, the bottom wall 12, and the first bracket 42.

[0348] In some embodiments, each crossbeam 50 may correspond to a plurality of through holes, and the plurality of through holes are arranged at intervals corresponding to the extension direction of the crossbeam 50 .

[0349] In the above solution, the first bracket 42 is connected to the crossbeam 50 by fasteners, which can improve the connection stability between the frame 40 and the first box body 10 and ensure that the battery 100 has a stable structure and has higher safety.

[0350] According to some embodiments of the present application, the frame 40 further includes a second bracket 43 , which connects the first side beam 41 c and the second side beam 41 d .

[0351] In some embodiments, the second bracket 43 may be triangular in shape and located at the corner where the first side beam 41c and the second side beam 41d are connected, thereby connecting the first side beam 41c and the second side beam 41d to tighten the first side beam 41c and the second side beam 41d. In other embodiments, the second bracket 43 may also be long and narrow, as long as it can connect the first side beam 41c and the second side beam 41d.

[0352] In some embodiments, the second bracket 43 can be connected to the first side beam 41c and the second side beam 41d by welding, bonding or fastener connection. In some embodiments, the second bracket 43 and the side beam 41 can be made of the same material.

[0353] In the above solution, the second bracket 43 connects the first side beam 41c and the second side beam 41d to ensure the connection stability of the first side beam 41c and the second side beam 41d, so that the frame 40 has a stable structure and effectively supports the first box body 10.

[0354] According to some embodiments of the present application, the frame 40 is made of steel, and the first box body 10 is made of aluminum alloy.

[0355] In some embodiments, to reduce the weight of the battery 100 and increase the energy density of the battery 100, the first housing 10 can be made of a lighter aluminum or aluminum alloy. To facilitate connection between the first housing 10 and the second housing 20, the first housing 10 and the second housing 20 can be made of the same material.

[0356] When the first box body 10 is made of relatively light aluminum or aluminum alloy material, in order to ensure that the structural strength of the battery 100 meets the requirements, the frame 40 can be made of relatively strong steel.

[0357] In the above solution, the first box body 10 is made of aluminum alloy, which ensures that the battery 100 is light and improves the weight energy density of the battery 100. On the other hand, to ensure the structural strength of the battery 100, the frame 40 can be made of strong steel.

[0358] In other embodiments, there is no limitation on the materials of the first box body 10 and the frame 40. The first box body 10 and the frame 40 can be made of the same material, for example, aluminum, aluminum alloy, or steel.

[0359] According to some embodiments of the present application, the present application further provides an energy storage device including the battery 100 described above. In some embodiments, the energy storage device may be an energy storage cabinet, which includes a cabinet body and multiple batteries 100. The multiple batteries 100 are arranged in the cabinet body and can collectively provide power to electrical equipment.

[0360] According to some embodiments of the present application, the present application further provides an electrical device, including the battery 100 described above, and the battery 100 is used to provide electrical energy.

[0361] According to some embodiments provided in the present application, the present application also provides a battery 100, please refer to Figures 3 to 18. The battery 100 includes a battery cell 100a, a first box body 10, a second box body 20, a seal 60 and a frame 40. The first box body 10 and the second box body 20 are made of aluminum alloy, and the frame 40 is made of steel. The first box body 10 is the lower box body, and the second box body 20 is the upper box body. The first box body 10 and the second box body 20 are connected to each other, and the seal 60 is arranged between the first box body 10 and the second box body 20. The first box body 10 and the second box body 20 together form a closed space, and the battery 100 is accommodated in the closed space. The frame 40 is located on the side of the first box body 10 facing away from the second box body 20 and supports the first box body 10.

[0362] The first housing 10 includes a bottom wall 12, a first side wall 11, and a first flange 13. The first side wall 11 is disposed at a portion of the edge of the bottom wall 12, giving the first housing 10 a dustpan-like shape. As shown in Figure 4, along the length of the first housing 10, the bottom wall 12 includes a first region 12a and a second region 12b arranged side by side. Along the width of the first housing 10, the second region 12b extends beyond the first region 12a. The first side wall 11 is disposed at the edge of the first region 12a, while the first side wall 11 is not disposed at the edge of the second region 12b. The first flange 13 extends outward from the end of the first side wall 11 away from the bottom wall 12. The end of the first flange 13 and the portion of the second region 12b that extends beyond the first region 12a are connected by a transition portion 14. The transition portion 14 is inclined relative to the bottom wall 12, and the inclination angle between the transition portion 14 and the bottom wall 12 is 60°. The number of battery cells 100a can be multiple, and multiple battery cells 100a are disposed in the first region 12a. The electronic components 100 b of the battery 100 are arranged in the second area 12 b .

[0363] The second box body 20 includes a top wall 21, a second side wall 22 and a second flange 23. The second side wall 22 is arranged around the edge of the top wall 21. The size of the portion of the second side wall 22 corresponding to the edge of the first area 12a of the bottom wall 12 is larger than the size of the portion of the second side wall 22 corresponding to the edge on the second area 12b of the bottom wall 12. The second flange 23 extends outward from one end of the second side wall 22 away from the top wall 21. The second flange 23 is fitted and connected to the edge of the bottom wall 12 where the first side wall 11 is not provided (the edge of the first area 12a), the first flange 13 and the transition portion 14. The sealing member 60 is provided corresponding to the first flange 13 and the second flange 23 to ensure the sealing between the first box body 10 and the second box body 20.

[0364] In the first housing 10, the bottom wall 12 includes a first base plate 15 and a second base plate 16 stacked together. A groove 160 is formed on the surface of the second base plate 16 facing the first base plate 15. The surface of the first base plate 15 facing the first base plate 15 and the groove 160 together form the flow channel 30. The first side wall 11 and the first flange 13 are integrally formed on the first base plate 15.

[0365] An inlet pipe 31 and an outlet pipe 32 are provided at the two corners of the first region 12a. The inlet pipe 31 and the outlet pipe 32 are connected to the flow channel 30 and are connected to external pipes to input or discharge heat exchange medium into or out of the flow channel 30. The first housing 10 can regulate the temperature of the battery cell 100a through the heat exchange medium. Referring to Figure 5, the openings of the inlet pipe 31 and the outlet pipe 32 are oriented in the height direction of the battery cell 100a, and the existing height space of the battery 100 can be used to plug and unplug the external pipes. At the same time, because the inlet pipe 31 and the outlet pipe 32 are directly connected to the flow channel 30 and their openings are oriented upward, the flow resistance of the heat exchange medium at the inlet pipe 31 and the outlet pipe 32 is relatively small, which can ensure the circulation of the heat exchange medium. As shown in Figure 11, to prevent the inlet pipe 31 and the outlet pipe 32 from affecting the sealing of the first housing 10 and the second housing 20, the second flange 23 is provided with a notch corresponding to the position of the inlet pipe 31 and the outlet pipe 32 to avoid the inlet pipe 31 and the outlet pipe 32.

[0366] The frame 40 includes a side beam 41, a first bracket 42, and a second bracket 43. The shape of the side beam 41 is consistent with that of the first housing 10. The side beam 41 is U-shaped and is positioned corresponding to the first flange 13 of the first housing 10. The side beam 41 uses the space below the first flange 13 to support the first flange, thereby reducing the impact of the upward shift of the center of gravity of the battery 100 caused by the installation of the frame 40. As shown in Figure 17, the cross-section of the side beam 41 is L-shaped and includes a first support surface 410 and a second support surface 411. The first support surface 410 supports the first flange 13, and the second support surface 411 supports the bottom wall 12. This ensures support for the first housing 10, increases the joint area between the frame 40 and the first housing 10, and reduces stress. The first support surface 410 can be connected to the first flange 13 via fasteners, and the second support surface 411 can be connected to the bottom wall 12 via fasteners. The width of the second support surface 411 can be greater than or equal to 10 mm to ensure effective support for the first housing 10. In some embodiments, the second flange 23 of the second box body 20, the first flange 13 and the bottom wall 12 of the first box body 10, and the side beam 41 may be connected together by fasteners.

[0367] As shown in Figure 16, a first cavity 41a is formed between the first side wall 11 and the side beam 41. The first cavity 41a can collapse and absorb energy when the battery 100 is impacted, thereby ensuring the safety of the battery 100. A second cavity 41b is formed inside the side beam 41. The second cavity 41b can collapse and absorb energy when the battery 100 is impacted, thereby ensuring the safety of the battery 100.

[0368] The first bracket 42 and the second bracket 43 are respectively connected to the side beam 41, enhancing the structural strength of the side beam 41. A crossbeam 50 is provided in the first housing 10 and connected to the bottom wall 12. This crossbeam 50 serves to enhance the strength of the first housing 10 and is used to mount and secure the battery 100 within the first housing 10. The bottom wall 12 is provided with a through hole, through which the crossbeam 50 is connected to the first bracket 42 via a rivet nut.

[0369] 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, wherein: include: Battery cells; a first box; a second box body, the second box body being connected to the first box body to jointly enclose a closed space for accommodating the battery cell; The first box body includes a first side wall and a bottom wall. The first side wall is connected to the second box body. Along the circumference of the bottom wall, the first side wall is a non-closed structure.

2. The battery according to claim 1, wherein The second box body is connected to an edge of the bottom wall where the first side wall is not provided.

3. The battery according to claim 1 or 2, wherein The bottom wall includes a first area and a second area, the first area and the second area are arranged side by side along a first direction, the first side wall is arranged at the edge of the first area, the edge of the second area is not provided with the first side wall, and the first direction is perpendicular to the thickness direction of the bottom wall.

4. The battery according to claim 3, wherein The battery further includes electronic components, which are accommodated in the enclosed space and at least partially disposed in the second area, and the battery cells are disposed in the first area.

5. The battery according to claim 3 or 4, wherein The first area includes a first edge and two second edges, the two second edges are arranged opposite to each other along a second direction, the first edge connects the two second edges, the first side wall is arranged at the first edge and the two second edges, and the second direction is perpendicular to the thickness direction of the bottom wall.

6. The battery according to claim 5, wherein The two second edges both extend along the first direction, and the first direction, the second direction, and the thickness direction of the bottom wall are perpendicular to each other.

7. The battery according to claim 5 or 6, wherein The length of the second edge is greater than the length of the first edge.

8. The battery according to any one of claims 5 to 7, wherein: The first box body further includes a first flange extending outward from an end of the first side wall away from the bottom wall, and the first side wall is connected to the second box body via the first flange.

9. The battery according to claim 8, wherein Along the second direction, the second area exceeds the two second edges; The first box body further includes a transition portion, through which an end portion of the first flange and a portion of the second region extending beyond the second edge are connected.

10. The battery according to claim 9, wherein The transition portion is arranged obliquely relative to the bottom wall.

11. The battery according to claim 10, wherein The inclination angle of the transition portion relative to the bottom wall is α, which satisfies 0°<α≤60°.

12. The battery according to any one of claims 9 to 11, wherein: The second box body includes a top wall, a second side wall and a second flange, the second side wall is arranged at an edge of the top wall, and the second flange extends outward from an end of the second side wall away from the top wall; The second flange includes a first part, a second part and a third part. The first part is connected to the edge of the bottom wall where the first side wall is not provided. The second part is provided corresponding to the transition portion. The third part is connected to the first flange.

13. The battery according to any one of claims 9 to 11, wherein: The second box body includes a top wall, a second side wall and a second flange, the second side wall is arranged at a portion of the edge of the top wall, and the second flange extends outward from an end of the second side wall away from the top wall; The second flange includes a first part and a second part, the first part is connected to the edge of the bottom wall where the first side wall is not provided, the second part is arranged corresponding to the transition portion, and the edge of the top wall where the second side wall is not provided is connected to the first flange.

14. The battery according to claim 12 or 13, wherein The second portion is arranged obliquely relative to the first portion.

15. The battery according to any one of claims 12 to 14, wherein: The second portion and the transition portion are parallel to each other.

16. The battery according to any one of claims 8 to 15, wherein: The bottom wall, the first side wall and the first flange are integrally formed.

17. The battery according to claim 16, wherein The first box body is formed by stamping, die-casting or bending.

18. The battery according to any one of claims 1 to 17, wherein The battery includes a flow channel for accommodating a heat exchange medium to regulate the temperature of the battery cell; the battery also includes an inlet pipe and an outlet pipe, both of which are connected to the flow channel and are located outside the enclosed space.

19. The battery according to claim 18, wherein The inlet pipe and the outlet pipe are both located on a side of the bottom wall facing the second box body.

20. The battery according to claim 19, wherein Along the direction of the bottom wall pointing to the second box body, the inlet pipe and the outlet pipe do not exceed the second box body.

21. The battery according to any one of claims 18 to 20, wherein The inlet pipe and the outlet pipe are both arranged obliquely or vertically relative to the bottom wall.

22. The battery according to any one of claims 19 to 21, wherein The second box body includes a top wall, a second side wall and a second flange, the second side wall is arranged at an edge of the top wall, and the second flange extends outward from an end of the second side wall away from the top wall; The second flange is provided with a first avoidance portion and a second avoidance portion, and the inlet pipe and the outlet pipe pass through the first avoidance portion and the second avoidance portion respectively.

23. The battery according to claim 22, wherein The first avoidance portion and the second avoidance portion are notches arranged on the edge of the second flange.

24. The battery according to any one of claims 18 to 23, wherein The flow channel is formed inside the bottom wall, and the inlet pipe and the outlet pipe are both arranged at an edge of the bottom wall where the first side wall is not arranged.

25. The battery according to claim 24, wherein A connection point between the inlet pipe and the bottom wall, and a connection point between the outlet pipe and the bottom wall are both located outside the closed space.

26. The battery according to claim 24 or 25, wherein The inlet pipe and the outlet pipe are respectively arranged at two corners of the bottom wall.

27. The battery according to any one of claims 24 to 26, wherein: The bottom wall includes a first substrate and a second substrate stacked together. The second substrate is disposed on a side of the first substrate facing away from the second box body. The flow channel is formed between the second substrate and the first substrate.

28. The battery according to claim 27, wherein The first sidewall is connected to the first substrate.

29. The battery according to claim 27 or 28, wherein A groove is formed on a surface of the second substrate facing the first substrate, and a surface of the first substrate facing the first substrate and the groove together form the flow channel.

30. The battery according to any one of claims 18 to 23, wherein The battery further includes a heat management component, the flow channel is arranged in the heat management component, the heat management component is arranged in the closed space, and the inlet pipe and the outlet pipe are both arranged in the heat management component.

31. The battery according to any one of claims 1 to 30, wherein The battery further includes a frame, which is disposed on a side of the first box body facing away from the second box body, and is used to support the first box body.

32. The battery according to claim 31, wherein The first box body further includes a first flange, the first flange extending outward from an end of the first side wall away from the bottom wall, and the first side wall is connected to the second box body through the first flange; The frame includes side beams, the side beams are arranged along the first flanges, and the first flanges are overlapped with the side beams.

33. The battery according to claim 32, wherein A first cavity is formed between the first side wall and the side beam.

34. The battery according to claim 32 or 33, wherein The side beam includes a first supporting surface and a second supporting surface. Along the thickness direction of the bottom wall, the first supporting surface protrudes from the second supporting surface. The first flange is overlapped with the first supporting surface, and the bottom wall is overlapped with the second supporting surface.

35. The battery according to any one of claims 32 to 34, wherein A second cavity is formed inside the side beam.

36. The battery according to any one of claims 32 to 35, wherein The side beam is formed by bending a plate-shaped component.

37. The battery according to any one of claims 34 to 36, wherein A second cavity is formed inside the side beam; The side beam includes a first connecting wall bent relative to the first supporting surface and a second connecting wall bent relative to the second supporting surface. The first connecting wall and the second connecting wall are stacked and welded.

38. The battery according to claim 37, wherein An end portion of at least one of the first connecting wall and the second connecting wall includes an extension section, which extends into the second cavity and abuts against a bottom edge of the side beam, and the bottom edge is arranged opposite to the first supporting surface and the second supporting surface.

39. The battery according to claim 38, wherein The extension section abuts against the middle area of ​​the bottom edge.

40. The battery according to claim 38 or 39, wherein The extension section is welded to the bottom edge.

41. The battery according to any one of claims 32 to 39, wherein The cross section of the side beam is L-shaped.

42. The battery according to any one of claims 32 to 41, wherein The side beam includes a first side beam and two second side beams, the two second side beams are arranged opposite to each other along a second direction, the first side beam connects the two second side beams, and the second direction is perpendicular to the thickness direction of the bottom wall.

43. The battery according to claim 42, wherein The frame further includes a first bracket, and the first bracket connects the two second side beams.

44. The battery according to claim 43, wherein The first bracket and the first side beam are spaced apart along a first direction, and the first direction, the second direction and the thickness direction of the bottom wall are perpendicular to each other.

45. The battery according to claim 43 or 44, wherein The first bracket is connected to ends of the two second side beams away from the first side beam.

46. ​​The battery according to any one of claims 43 to 45, wherein The battery further includes a crossbeam disposed on the bottom wall and dividing the enclosed space into a plurality of accommodation spaces.

47. The battery according to claim 46, wherein The bottom wall is formed with a through hole, and the first bracket is connected to the crossbeam via a fastener passing through the through hole.

48. The battery according to any one of claims 42 to 47, wherein The frame further includes a second bracket connecting the first side beam and the second side beam.

49. The battery according to any one of claims 31 to 48, wherein The frame is made of steel, and the first box is made of aluminum alloy.

50. An energy storage device, wherein: Comprising a battery according to any one of claims 1-49.

51. An electrical device, wherein: The battery according to any one of claims 1 to 49 is used to provide electrical energy.

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