Battery and electrical apparatus

Abstract

A battery (1) and an electrical apparatus. The battery (1) comprises a cooling structure (12) and battery cells (13), wherein there are at least two battery cells (13), and the battery cells (13) are sequentially arranged. Each battery cell (13) comprises a housing (131) and an electrode assembly, the housing (131) forming a first accommodation cavity, and the first accommodation cavity being used for accommodating the electrode assembly; the housing (131) is provided with a first surface (1311), the first surface (1311) corresponding to the at least one battery cell (13) being recessed towards the first accommodation cavity to form a cooling clearance area (13111), and a cooling structure (12) being provided in each cooling clearance area (13111).

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure is based on and claims the priority of Chinese patent application with application number 202410270995.7, application date March 8, 2024, and invention name “Battery and Electrical Device”. The entire content of this Chinese patent application is hereby incorporated into this disclosure as a reference. Technical Field

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

[0004] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in energy storage fields.

[0005] In new energy vehicles equipped with batteries, the battery cells can be used to provide all or part of the power. During use, a cooling structure is located on the first surface of the battery cell housing, filled with coolant, to cool the battery cells. However, the presence of the cooling structure on the outside of the housing reduces the space available for the battery cells, thereby reducing the battery's volume utilization.

[0006] Summary of the Invention

[0007] To solve the above technical problems, the embodiments of the present disclosure provide a battery and an electrical device. In the battery, the shell of the battery cell provides a cooling avoidance area for the cooling structure, thereby increasing the space available for the battery cell and improving the volume utilization of the battery.

[0008] The present disclosure is achieved through the following technical solutions.

[0009] In a first aspect, the present disclosure provides a battery, which includes a cooling structure and battery cells, wherein there are at least two battery cells arranged in sequence, and the battery cells include a shell and an electrode assembly, wherein a first accommodating cavity is formed in the shell, and the first accommodating cavity is used to accommodate the electrode assembly, and the shell has a first surface, and the first surface corresponding to at least one battery cell is recessed toward the first accommodating cavity to form a cooling avoidance area, and a cooling structure is provided in each cooling avoidance area.

[0010] The battery provided by the present disclosure has a shell having a first surface, and the first surface corresponding to at least one battery cell is recessed toward the first accommodating cavity to form a cooling avoidance area. A cooling structure is provided in each cooling avoidance area, and the cooling structure cools the corresponding battery cell. At the same time, the cooling structure is provided in the cooling avoidance area, which is equivalent to the shell itself providing at least a portion of space for the cooling structure. In other words, the shell provides a portion of space for the cooling structure, and the cooling structure occupies another portion of space outside the shell. Alternatively, the shell provides all of the space for the cooling structure, and the cooling structure does not need to be entirely located outside the shell, thereby increasing the space available for the battery cell and improving the volume utilization of the battery.

[0011] In one implementation provided by the present disclosure, along the direction of the first surface toward the first accommodating cavity, the depth dimension of the cooling avoidance area is greater than or equal to the dimension of the cooling structure, and the surface of the cooling structure away from the cooling avoidance area is lower than or flush with the surface of the non-recessed area of ​​the first surface.

[0012] The battery provided by the present disclosure has a surface of the cooling structure away from the cooling avoidance area that is lower than or flush with the surface of the non-recessed area of ​​the first surface. In other words, the shell provides all the space for the cooling structure, and the cooling structure does not need to occupy space outside the shell. In this way, the volume utilization of the battery can be further improved.

[0013] In an implementation provided by the present disclosure, along the extension direction of the first surface, the size of the cooling avoidance area is larger than the size of the cooling structure, and an avoidance gap exists between the cooling structure and the cooling avoidance area.

[0014] In the battery provided by the present disclosure, since the cooling structure and the cooling avoidance area have an avoidance gap, when the cooling structure is disposed in the cooling avoidance area, the position of the cooling structure in the cooling avoidance area can be conveniently adjusted through the avoidance gap.

[0015] In an implementation provided by the present disclosure, a portion of the cooling avoidance area adjacent to the non-recessed area of ​​the first surface forms a guide surface, and the guide surface extends toward a middle portion of the cooling avoidance area.

[0016] The battery provided by the present disclosure forms a guide surface between the cooling avoidance area and the portion adjacent to the non-recessed area of ​​the first surface. The cooling structure can enter the cooling avoidance area through the guide surface. The guide surface provides an installation guide for the cooling structure, thereby saving time for the cooling structure to enter the cooling avoidance area.

[0017] In an implementation provided by the present disclosure, the surface of the cooling structure facing the cooling avoidance area is a smooth plane, the surface of the cooling avoidance area facing the cooling structure is a smooth plane, and the cooling structure is in abutment contact with the cooling avoidance area.

[0018] The battery provided by the present disclosure has a smooth surface on the surface of the cooling structure facing the cooling avoidance area, and a smooth surface on the surface of the cooling avoidance area facing the cooling structure. The cooling structure and the cooling avoidance area are in abutment with each other. At this time, the cooling structure and the cooling avoidance area can be completely fitted together, so that the contact area between the cooling structure and the cooling avoidance area is reduced, thereby enhancing the cooling effect of the cooling structure.

[0019] In an implementation provided by the present disclosure, the battery cell further includes a tab connected to the electrode assembly, the shell has a second surface, the tab is arranged on the second surface, and the second surface is in non-surface contact with the cooling structure.

[0020] The battery provided by the present disclosure has a second surface as the shell has a second surface, and the second surface is not in surface contact with the cooling structure. In other words, the first surface and the second surface are not on the same plane. When the tab is arranged on the second surface, the tab will not occupy the space of the first surface. In this way, it will not affect the position of the first surface that is recessed toward the first accommodating cavity.

[0021] In one possible implementation provided by the present disclosure, along the arrangement direction of at least two battery cells, the cooling avoidance area on each battery cell passes through its first surface, multiple cooling avoidance areas are connected to form a combined cooling avoidance area, there is one cooling structure, and the cooling structure is arranged in the combined cooling avoidance area.

[0022] The battery provided by the present disclosure has a cooling avoidance area on each battery cell that passes through its first surface along the arrangement direction of at least two battery cells, and multiple cooling avoidance areas are connected to form a combined cooling avoidance area, and the cooling structure is one. In this way, the cooling effect of the cooling structure can be enhanced. At the same time, setting the cooling structure as one also facilitates subsequent maintenance.

[0023] In an implementation method provided by the present disclosure, the cooling structure includes a cooling plate and an extension portion, the extension portion is arranged on at least one side of the cooling plate along the extension direction of the cooling plate, the extension portion is connected to the cooling plate, an opening is provided on the extension portion, the cooling plate is arranged in the combined cooling avoidance area, and the extension portion is staggered with the combined cooling avoidance area.

[0024] In the battery provided by the present disclosure, the extension portion is misaligned with the combined cooling avoidance area to avoid the extension portion occupying the space of the combined cooling avoidance area, thereby ensuring that the space of the combined cooling avoidance area is used to set up the cooling structure, thereby increasing the cooling effect of the cooling structure.

[0025] In one implementation provided by the present disclosure, the axial direction of the opening is perpendicular to the extension direction of the cooling plate.

[0026] The battery provided by the present invention has an axial direction of the opening perpendicular to the extension direction of the cooling plate. In this way, the operator can provide liquid to or discharge liquid from the extension part in a direction perpendicular to the extension direction of the cooling plate. The direction perpendicular to the extension direction of the cooling plate is parallel to the direction in which the first surface is recessed toward the first accommodating cavity and the direction in which the first accommodating cavity is toward the first surface. In this way, the operator can operate conveniently.

[0027] In one possible implementation provided by the present disclosure, in the direction in which the cooling avoidance area extends, in a direction perpendicular to the arrangement direction, the cooling avoidance area of ​​each battery cell does not penetrate its first surface, and limit platforms are formed on both sides of the cooling avoidance area to limit the cooling structure.

[0028] In the battery provided by the present disclosure, since the cooling avoidance area of ​​each battery cell does not penetrate the first surface thereof, limiting platforms are formed on both sides of the cooling avoidance area to limit the cooling structure, thereby reducing the possibility of the cooling structure falling off from the cooling avoidance area.

[0029] In one possible implementation provided by the present disclosure, in the direction in which the cooling avoidance area extends and in a direction perpendicular to the arrangement direction, the sizes of the limit platforms formed on both sides are the same.

[0030] In the battery provided by the present disclosure, the limit platforms formed on both sides have the same size and strength, thereby avoiding a situation where the size difference between the limit platforms on one side and the limit platforms on the other side is too large, resulting in a too large difference in strength between the limit platforms on the two sides, making it impossible for the limit platform on one side to limit the cooling structure.

[0031] In one implementation provided by the present disclosure, the battery includes a box body, the box body forms a second accommodating cavity, the cooling structure and the battery cell are both accommodated in the second accommodating cavity, a first fixing structure is provided between the cooling structure and the box body, and the cooling structure is fixed to the box body through the first fixing structure.

[0032] In the battery provided by the present disclosure, a first fixing structure is provided between the cooling structure and the housing, and the cooling structure is fixed to the housing via the first fixing structure. This can increase the overall structural strength of the battery and improve the main vibration frequency.

[0033] In an implementation method provided by the present disclosure, the first fixing structure includes a first threaded hole set on the box body, a second threaded hole set on the cooling structure, and a threaded fastener, and the threaded fastener passes through the first threaded hole and the second threaded hole in sequence to threadably fix the cooling structure and the box body.

[0034] The battery provided by the present disclosure has a cooling structure and a housing that are fixed together by screw threads. On the one hand, the cooling structure and the housing are fixed more securely. On the other hand, the screw thread fixing method is detachable, which facilitates later disassembly for maintenance of the cooling structure and the housing.

[0035] In one possible implementation provided by the present disclosure, an adhesive layer is provided between the cooling structure and the cooling avoidance area, and the cooling structure is bonded to the cooling avoidance area through the adhesive layer.

[0036] In the battery provided by the present disclosure, an adhesive layer is provided between the cooling structure and the cooling avoidance area, and the cooling structure is bonded to the cooling avoidance area through the adhesive layer, thereby reducing the shaking of the cooling structure in the cooling avoidance area.

[0037] In a second aspect, the present disclosure provides an electrical device, comprising the battery provided in any one of the first aspects for providing electrical energy.

[0038] The electrical device provided by the present disclosure, since it includes the battery for providing electrical energy provided by any one of the first aspects, has the same technical effect, that is, in the battery, the shell of the battery cell provides a cooling avoidance area for the cooling structure, thereby improving the volume utilization of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference numerals are used throughout the accompanying drawings to represent the same components.

[0040] FIG1 is a schematic structural diagram of a battery provided in an embodiment of the present disclosure;

[0041] FIG2 is a schematic structural diagram of a battery provided by an embodiment of the present disclosure, in which a cooling structure is placed in a cooling avoidance area of ​​a battery cell from a first perspective;

[0042] FIG3 is a schematic structural diagram of a second perspective of a cooling structure in a battery provided by an embodiment of the present disclosure, in which the cooling structure is placed in a cooling avoidance area of ​​a battery cell;

[0043] FIG4 is a schematic structural diagram of a cooling structure in a battery provided by an embodiment of the present disclosure, in which the cooling structure is placed in a cooling avoidance area of ​​a battery cell from a third perspective;

[0044] FIG5 is a schematic structural diagram of a cooling structure in a battery provided by an embodiment of the present disclosure;

[0045] FIG6 is a schematic structural diagram of an arrangement of at least two battery cells in a battery provided by an embodiment of the present disclosure;

[0046] FIG7 is a schematic structural diagram of a battery cell from a first perspective according to an embodiment of the present disclosure;

[0047] FIG8 is a structural schematic diagram of a battery cell provided by an embodiment of the present disclosure from a second viewing angle.

[0048] Description of Reference Numerals

[0049] 1-battery; 11-housing; 111-second accommodating chamber; 12-cooling structure; 121-cooling plate; 122-extension portion; 1221-opening; 13-battery cell; 131-housing; 1311-first surface; 13111-cooling avoidance area; 13112-non-recessed area; 1312-second surface; 13121-right surface; 13122-left surface; 132-positive electrode ear; 133-negative electrode ear; 134-guide surface; A-height direction; B-length direction; C-thickness direction. DETAILED DESCRIPTION

[0050] The following embodiments of the technical solution of the present disclosure are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present disclosure and are therefore only examples and are not intended to limit the scope of protection of the present disclosure.

[0051] 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 the present disclosure belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the terms "including" and "having" and any variations thereof in the specification and claims of the present disclosure and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0052] In the description of the embodiments of the present disclosure, technical terms such as "first," "second," and "third" are used solely to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present disclosure, "plurality" means more than two, unless otherwise specifically defined.

[0053] 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 disclosure. 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.

[0054] In the description of the embodiments of the present disclosure, 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 three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0055] In the description of the embodiments of the present disclosure, the orientations or positional relationships indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present disclosure.

[0056] In the description of the embodiments of the present disclosure, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," 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 can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure based on specific circumstances.

[0057] In the description of the embodiments of the present disclosure, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0058] Hereinafter, the present disclosure will be described in detail.

[0059] Currently, new energy batteries are increasingly being used in everyday life and industry. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and other fields. As the application areas of power batteries continue to expand, market demand is also growing.

[0060] In new energy vehicles equipped with batteries, battery modules or battery cells can be used to provide all or part of the power. The battery cells within a battery can also be used to provide all or part of the power. During use, the battery cells are equipped with cooling structures filled with coolant to cool the cells. However, the cooling structures reduce the space available for the battery cells, reducing the volume utilization of the battery cells within the battery. Therefore, improving the volume utilization of batteries is a challenge that the industry needs to address.

[0061] To this end, an embodiment of the present disclosure provides a battery, which includes a cooling structure and battery cells. There are at least two battery cells arranged in sequence. The battery cells include a shell and an electrode assembly. A first accommodating cavity is formed in the shell, and the first accommodating cavity is used to accommodate the electrode assembly. The shell has a first surface, and the first surface corresponding to at least one battery cell is recessed toward the first accommodating cavity to form a cooling avoidance area. A cooling structure is provided in each cooling avoidance area. The cooling avoidance area is formed by recessing the first surface of the shell toward the first accommodating cavity of the shell. The cooling structure is provided in the cooling avoidance area. In this way, the shell can provide at least a portion of space for the cooling structure, so that the space that can be occupied by the battery cell is increased, thereby improving the volume utilization of the battery.

[0062] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0063] 1 , 2 , 3 , 4 , 7 and 8 , an embodiment of the present disclosure provides a battery 1, which includes a cooling structure 12 and battery cells 13. There are at least two battery cells 13 arranged in sequence. The battery cells 13 include a shell 131 and an electrode assembly. A first accommodating cavity is formed in the shell 131, and the first accommodating cavity is used to accommodate the electrode assembly. The shell 131 has a first surface 1311. The first surface 1311 corresponding to at least one battery cell 13 is recessed toward the first accommodating cavity to form a cooling avoidance area 13111. A cooling structure 12 is provided in each cooling avoidance area 13111.

[0064] In the embodiment of the present disclosure, the battery 1 may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0065] In the embodiment of the present disclosure, the battery 1 can be used in, but is not limited to, energy storage power supply systems, vehicles, ships, aircraft, and other electrical devices.

[0066] In the embodiment of the present disclosure, the battery 1 may be a battery module, including at least two battery cells 13 , and the at least two battery cells 13 may be connected in series, in parallel, or in hybrid connection via a busbar component.

[0067] In the disclosed embodiment, the battery 1 may be a battery pack, which includes a case 11 , at least two battery cells 13 and a cooling structure 12 . The at least two battery cells 13 and the cooling structure 12 may be accommodated in a second accommodating cavity 111 formed in the case 11 .

[0068] In the embodiment of the present disclosure, the battery cell 13 may be a secondary battery. A secondary battery refers to a battery cell 13 that can be continuously used by activating active materials by charging after the battery cell 13 is discharged.

[0069] In the embodiment of the present disclosure, the battery cell 13 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a sodium metal battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-chromium battery, a lead-acid battery, etc., and the embodiment of the present disclosure does not limit this.

[0070] In the embodiment of the present disclosure, the battery cell 13 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square battery cell, a blade-shaped battery cell, and a polygonal battery. The embodiment of the present disclosure does not limit the shape of the battery cell 13.

[0071] In the embodiment of the present disclosure, if the battery cell 13 is a square battery, the length dimension of the square battery is greater than the height dimension, that is, the square battery is a long battery, which can improve the volume utilization of the battery cell 13 and the energy density of the battery cell 13. Here, it should be explained that the volume utilization of the battery cell 1 refers to the ratio of the effective capacity of the battery cell 13 to the total volume, and the energy density of the battery cell 13 refers to the energy released by the battery cell 13 per unit mass or unit volume, that is, the volume specific energy or mass specific energy. In one implementation method provided in the embodiment of the present disclosure, the ratio of the length and height of the square battery is greater than 5 and less than 10.

[0072] In the embodiment of the present disclosure, there are at least two battery cells 13 arranged in sequence. The arrangement direction of the at least two battery cells 13 can be the length direction B of the battery cell 13, the thickness direction C of the battery cell 13, or the height direction A of the battery cell 13. This is not limited in the embodiment of the present disclosure. In one implementation provided in the embodiment of the present disclosure, the arrangement direction of the at least two battery cells 13 is the thickness direction C of the battery cell 13.

[0073] In the disclosed embodiment, the electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell 13, active ions, such as lithium ions, are intercalated and released between the positive and negative electrodes. The separator is disposed between the positive and negative electrodes to prevent a short circuit between the positive and negative electrodes while allowing the passage of spark ions. In some practical applications, the positive electrode can be a positive electrode sheet, and the negative electrode can be a negative electrode sheet.

[0074] In the embodiment of the present disclosure, the electrode assembly can be a wound structure, with the positive electrode sheet and the negative electrode sheet forming a wound structure. Of course, the electrode assembly can also be a stacked structure. The embodiment of the present disclosure does not limit the specific structure of the electrode assembly.

[0075] In the embodiment of the present disclosure, the shell 131 is used to accommodate components such as electrode assemblies and electrolytes. The shell 131 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film.

[0076] In the embodiment of the present disclosure, a first accommodating cavity is formed in the shell 131, and the electrode assembly is arranged in the first accommodating cavity. The inner contour of the first accommodating cavity can be a regular shape, such as a cube, a rectangular parallelepiped, a cylinder, etc.; it can also be an irregular shape, which is not limited by the embodiment of the present disclosure.

[0077] In the embodiment of the present disclosure, the housing 131 has a first surface 1311. If the battery cell 13 is a square battery, the first surface 1311 can be the top surface of the square battery; the first surface 1311 can be the bottom surface of the square battery; the first surface 1311 can be the left surface 13122 of the square battery; the first surface 1311 can be the right surface 13121 of the square battery; the first surface 1311 can be the front surface of the square battery; the first surface 1311 can be the rear surface of the square battery; the first surface 1311 can also be the surface with the largest area in the square battery. The specific position of the first surface 1311 on the housing 131 is not limited in the embodiment of the present disclosure. In one implementation provided by the embodiment of the present disclosure, the battery cell 13 is a square battery, the first surface 1311 is the top surface of the square battery, and the top surface is the largest surface of the square battery. In other words, the top surface is the surface with the largest area in the square battery.

[0078] In the embodiment of the present disclosure, the first surface 1311 corresponding to at least one battery cell 13 is recessed toward the first accommodating cavity to form a cooling escape area 13111. Here, the direction in which the first surface 1311 is recessed toward the first accommodating cavity can be the height direction A of the battery cell 13; the length direction B of the battery cell 13; or the thickness direction C of the battery cell 13, which is not limited in the embodiment of the present disclosure. In one implementation provided by the embodiment of the present disclosure, the arrangement direction of at least two battery cells 13 is the thickness direction C of the battery cells 13, and the direction in which the first surface 1311 is recessed toward the first accommodating cavity is the height direction A of the battery cell 13.

[0079] In the embodiment of the present disclosure, the first surface 1311 corresponding to at least one battery cell 13 is recessed toward the first accommodating cavity to form a cooling avoidance area 13111. Here, the cooling avoidance area 13111 can be formed by the edge portion of the first surface 1311 being recessed toward the first accommodating cavity; the cooling avoidance area 13111 can also be formed by the non-edge portion of the first surface 1311 being recessed toward the first accommodating cavity. The embodiment of the present disclosure does not impose any restrictions on this.

[0080] In the embodiment of the present disclosure, the cooling avoidance area 13111 is used to set the cooling structure 12. Here, the inner contour shape of the cooling avoidance area 13111 can be exactly the same as the outer contour shape of the cooling structure 12, or can be completely different. This embodiment of the present disclosure is also not limited to this.

[0081] In the embodiment of the present disclosure, the cooling structure 12 is used to cool the battery cell 13. The cooling structure 12 may include a cooling plate 121. A cooling cavity is formed in the cooling plate 121. The cooling cavity is used to set a coolant. The coolant may be a liquid that achieves a cooling effect. The coolant may be a molten metal liquid. The coolant may be an ethylene glycol aqueous solution. The embodiment of the present disclosure does not limit the type of the coolant.

[0082] The battery 1 provided by the embodiment of the present disclosure has a shell 131 having a first surface 1311. The first surface 1311 corresponding to at least one battery cell 13 is recessed toward the first accommodating cavity to form a cooling avoidance area 13111. A cooling structure 12 is provided in each cooling avoidance area 13111. The cooling structure 12 cools the corresponding battery cell 13. At the same time, the cooling structure 12 is provided in the cooling avoidance area 13111, which is equivalent to the shell 131 itself providing at least a portion of space for the cooling structure 12. In other words, the shell 131 provides a portion of space for the cooling structure 12, and the cooling structure 12 occupies another portion of space outside the shell 131. Alternatively, the shell 131 provides all of the space for the cooling structure 12, and the cooling structure 12 does not need to be entirely located outside the shell 131, so that the space that can be occupied by the battery cell 13 is increased, thereby improving the volume utilization rate of the battery 1.

[0083] 1 , 3 , 4 and 5 , an embodiment of the present disclosure provides a battery 1 , wherein a depth dimension of a cooling avoidance area 13111 along a direction from the first surface 1311 toward the first accommodating cavity is greater than or equal to a dimension of the cooling structure 12 , and a surface of the cooling structure 12 away from the cooling avoidance area 13111 is lower than or flush with a surface of a non-recessed area 13112 of the first surface 1311 .

[0084] In the embodiment of the present disclosure, the first surface 1311 includes a cooling avoidance area 13111 and a non-recessed area 13112. In other words, the first surface 1311 except the cooling avoidance area 13111 belongs to the non-recessed area 13112. Specifically, please refer to Figure 2. If the first surface 1311 of the shell 131 is the upper surface, the part of the upper surface that is recessed toward the first accommodating cavity is the cooling avoidance area 13111, and the part of the upper surface that is not recessed toward the first accommodating cavity can be called the non-recessed area 13112.

[0085] In the embodiment of the present disclosure, along the direction of the first surface 1311 toward the first accommodating cavity, if the depth dimension of the cooling avoidance area 13111 is greater than the size of the cooling structure 12, the surface of the cooling structure 12 away from the cooling avoidance area 13111 is lower than the surface of the non-recessed area 13112 of the first surface 1311; if the depth dimension of the cooling avoidance area 13111 is smaller than the size of the cooling structure 12, the surface of the cooling structure 12 away from the cooling avoidance area 13111 is flush with the surface of the non-recessed area 13112 of the first surface 1311.

[0086] In the embodiment of the present disclosure, along the first surface 1311 toward the first accommodating cavity, the depth dimension of the cooling avoidance area 13111 is equal to the dimension of the cooling structure 12, and the surface of the cooling structure 12 away from the cooling avoidance area 13111 is flush with the surface of the non-recessed area 13112 of the first surface 1311. Here, if the surface of the non-recessed area 13112 of the first surface 1311 is convex, the surface of the cooling structure 12 away from the cooling avoidance area 13111 is flush with the highest point of the non-recessed area 13112 of the first surface 1311; if the surface of the non-recessed area 13112 of the first surface 1311 is concave, the surface of the cooling structure 12 away from the cooling avoidance area 13111 is flush with the lowest point of the non-recessed area 13112 of the first surface 1311. Of course, the surface of the non-recessed area 13112 of the first surface 1311 can also be a smooth plane.

[0087] In the battery 1 provided by the embodiment of the present disclosure, the surface of the cooling structure 12 away from the cooling avoidance area 13111 is lower than or flush with the surface of the non-recessed area 13112 of the first surface 1311. In other words, the shell 131 provides all the space for the cooling structure 12, and the cooling structure 12 does not need to occupy the space outside the shell 131. In this way, the volume utilization of the battery 1 can be further improved.

[0088] 1 , 3 , 4 and 5 , an embodiment of the present disclosure provides a battery 1 , wherein along the extension direction of the first surface 1311 , the size of the cooling avoidance area 13111 is larger than the size of the cooling structure 12 , and an avoidance gap is provided between the cooling structure 12 and the cooling avoidance area 13111 .

[0089] In the embodiment of the present disclosure, the direction of extension of the first surface 1311 can be the length direction B of the battery cell 13, or the thickness direction C of the battery cell 13, which is not limited in the embodiment of the present disclosure. In one implementation provided by the embodiment of the present disclosure, the arrangement direction of at least two battery cells 13 is the thickness direction C of the battery cell 13, and the direction in which the first surface 1311 is recessed toward the first accommodating cavity is the height direction A of the battery cell 13. Here, the direction of extension of the first surface 1311 is the length direction B of the battery cell 13.

[0090] In the embodiment of the present disclosure, along the extension direction of the first surface 1311, the size of the cooling avoidance area 13111 is larger than the size of the cooling structure 12, and the cooling structure 12 and the cooling avoidance area 13111 have an avoidance gap. Here, along the extension direction of the first surface 1311, the cooling structure 12 can be provided with an avoidance gap on one side of the cooling avoidance area 13111; the cooling structure 12 can also be provided with avoidance gaps on both sides opposite to the cooling avoidance area 13111; the cooling structure 12 can also be provided with avoidance gaps on the surrounding sides of the cooling avoidance area 13111.

[0091] The battery 1 provided in the embodiment of the present disclosure has an avoidance gap between the cooling structure 12 and the cooling avoidance area 13111. Therefore, when the cooling structure 12 is disposed in the cooling avoidance area 13111, the position of the cooling structure 12 in the cooling avoidance area 13111 can be conveniently adjusted through the avoidance gap.

[0092] 1 , 3 , 4 , 5 and 6 , an embodiment of the present disclosure provides a battery 1 , wherein a portion of the cooling avoidance area 13111 adjacent to the non-recessed area 13112 of the first surface 1311 forms a guide surface 134 , which extends toward the middle of the cooling avoidance area 13111 .

[0093] In the embodiment of the present disclosure, the portion of the cooling avoidance region 13111 adjacent to the non-recessed region 13112 of the first surface 1311 forms a guide surface 134, which extends toward the center of the cooling avoidance region 13111. Here, if the cooling avoidance region 13111 is a cube, the center of the cooling avoidance region 13111 is the center of the cube; if the cooling avoidance region 13111 is a rectangular parallelepiped, the center of the cooling avoidance region 13111 is the center of the rectangular parallelepiped; if the cooling avoidance region 13111 is an irregular structure, the center of the cooling avoidance region 13111 is the center of gravity of the irregular structure. On this basis, since the structure of the cooling avoidance region 13111 can be diverse, and correspondingly, the position of the center of the cooling avoidance region 13111 is also multi-positioned, the extension direction of the guide surface 134 toward the center of the cooling avoidance region 13111 can also be diverse.

[0094] In the battery 1 provided by the embodiment of the present disclosure, since the portion adjacent to the cooling avoidance area 13111 and the non-recessed area 13112 of the first surface 1311 forms a guide surface 134, the cooling structure 12 can enter the cooling avoidance area 13111 through the guide surface 134. The guide surface 134 provides an installation guide for the cooling structure 12, thereby saving the time for the cooling structure 12 to enter the cooling avoidance area 13111.

[0095] 4 , 5 and 6 , in a battery 1 provided by an embodiment of the present disclosure, the surface of the cooling structure 12 facing the cooling avoidance area 13111 is a smooth plane, the surface of the cooling avoidance area 13111 facing the cooling structure 12 is a smooth plane, and the cooling structure 12 is in contact with the cooling avoidance area 13111.

[0096] In the embodiment of the present disclosure, the surface of the cooling structure 12 facing the cooling avoidance area 13111 is a smooth plane, and the surface of the cooling avoidance area 13111 facing the cooling structure 12 is a smooth surface. In other words, the surfaces where the cooling avoidance area 13111 and the cooling structure 12 contact each other are both smooth surfaces.

[0097] In the embodiment of the present disclosure, the surface of the cooling structure 12 that is not facing the cooling avoidance area 13111 can be a non-smooth plane or a smooth plane; accordingly, the surface of the cooling avoidance area 13111 that is not facing the cooling structure 12 can be a non-smooth plane or a smooth plane, and the embodiment of the present disclosure does not limit this. In one implementation method provided by the embodiment of the present disclosure, the surface of the cooling structure 12 that is not facing the cooling avoidance area 13111 is a smooth plane, and the surface of the cooling avoidance area 13111 that is not facing the cooling structure 12 is also a smooth surface. In this way, the operator can reduce the risk of injury when placing the cooling structure 12 in the cooling avoidance area 13111.

[0098] In the battery 1 provided by the embodiment of the present disclosure, since the surface of the cooling structure 12 facing the cooling avoidance area 13111 is a smooth plane, and the surface of the cooling avoidance area 13111 facing the cooling structure 12 is a smooth plane, the cooling structure 12 and the cooling avoidance area 13111 are in abutment with each other. At this time, the cooling structure 12 and the cooling avoidance area 13111 can be completely fitted together, so that the contact area between the cooling structure 12 and the cooling avoidance area 13111 is increased, thereby enhancing the cooling effect of the cooling structure 12.

[0099] 4 , 7 and 8 , an embodiment of the present disclosure provides a battery 1 , wherein the battery cell 13 further includes a tab connected to the electrode assembly, the shell 131 has a second surface 1312 , the tab is disposed on the second surface 1312 , and the second surface 1312 is in non-surface contact with the cooling structure 12 .

[0100] In the embodiment of the present disclosure, the tabs can conduct current from the electrode assembly, and the tabs include a positive tab 132 and a negative tab 133 .

[0101] In the embodiment of the present disclosure, the shell 131 has a second surface 1312, and the second surface 1312 is not in surface contact with the cooling structure 12. Here, it should be supplemented that the first surface 1311 is recessed toward the first accommodating cavity to form a cooling avoidance area 13111, and the cooling structure 12 is arranged in the cooling avoidance area 13111. It can be seen that the recessed portion of the first surface 1311 is in surface contact with the cooling structure 12. If the second surface 1312 is not in surface contact with the cooling structure 12, it means that the first surface 1311 and the second surface 1312 are not on the same plane. For example, if the battery cell 13 is a square battery, and the first surface 1311 is the upper surface, the second surface 1312 may be the right surface 13121, which does not contact the cooling structure 12; the second surface 1312 may be the left surface 13122, which also does not contact the cooling structure 12; the second surface 1312 may be the lower surface, which also does not contact the cooling structure 12; the second surface 1312 may be the front surface, which is in line contact with the cooling structure 12; the second surface 1312 may also be the rear surface, which also is in line contact with the cooling structure 12. In one implementation provided by the present disclosure, if the tabs include a positive tab 132 and a negative tab 133, the positive tab 132 may be disposed on the right surface 13121 of the second surface 1312, and the negative tab 133 may be disposed on the left surface 13122 of the second surface 1312.

[0102] The battery 1 provided in the embodiment of the present disclosure has a shell 131 having a second surface 1312, and the second surface 1312 is not in surface contact with the cooling structure 12. In other words, the first surface 1311 and the second surface 1312 are not on the same plane. When the tab is arranged on the second surface 1312, the tab will not occupy the space of the first surface 1311, so as not to affect the position of the first surface 1311 recessed toward the first accommodating cavity.

[0103] 5 , 6 , 7 and 8 , an embodiment of the present disclosure provides a battery 1 , wherein along the arrangement direction of at least two battery cells 13 , a cooling avoidance area 13111 on each battery cell 13 passes through its first surface 1311 , multiple cooling avoidance areas 13111 are connected to form a combined cooling avoidance area, there is one cooling structure 12 , and the cooling structure 12 is arranged in the combined cooling avoidance area.

[0104] In the embodiment of the present disclosure, if the arrangement direction of at least two battery cells 13 is the thickness direction C of the battery cells 13 , then along the arrangement direction of at least two battery cells 13 , the cooling avoidance area 13111 of each battery cell 13 passes through the first surface 1311 , then it should be along the thickness direction C of the battery cell 13 , the cooling avoidance area 13111 of each battery cell 13 passes through the first surface 1311 .

[0105] The battery 1 provided in the embodiment of the present disclosure has a cooling avoidance area 13111 on each battery cell 13 that passes through its first surface 1311 along the arrangement direction of at least two battery cells 13, and multiple cooling avoidance areas 13111 are connected to form a combined cooling avoidance area, and the cooling structure 12 is one. In this way, the cooling effect of the cooling structure 12 can be enhanced. At the same time, setting the cooling structure 12 as one also facilitates later maintenance.

[0106] 2 , 3 and 5 , an embodiment of the present disclosure provides a battery 1, wherein a cooling structure 12 includes a cooling plate 121 and an extension portion 122 . The extension portion 122 is arranged on at least one side of the cooling plate 121 along an extension direction of the cooling plate 121 . The extension portion 122 is communicated with the cooling plate 121 . An opening 1221 is provided on the extension portion 122 . The cooling plate 121 is arranged in a combined cooling avoidance area, and the extension portion 122 is staggered with the combined cooling avoidance area.

[0107] In the embodiment of the present disclosure, a cooling cavity is provided in the cooling plate 121, and a coolant is provided in the cooling cavity. The coolant can be a liquid that achieves a cooling effect, the coolant can be a molten metal liquid, or the coolant can be an ethylene glycol aqueous solution. The embodiment of the present disclosure does not limit the type of the coolant.

[0108] In the embodiment of the present disclosure, an opening 1221 is provided on the extension piece, and the opening 1221 is a location for supplying liquid to the cooling plate 121 and / or draining liquid.

[0109] In the embodiment of the present disclosure, the extension portion 122 is offset from the combined cooling avoidance area. In other words, the extension portion 122 does not occupy the space of the combined cooling avoidance area, that is, the combined cooling avoidance area is only used to set the cooling plate 121.

[0110] In the embodiment of the present disclosure, the extension portion 122 can be integrated with the upper shell 131 in the shell 131; the extension portion 122 can be integrated with the lower shell 131 in the shell 131; if the battery 1 includes a case 11, the case 11 forms a second accommodating cavity 111, and the second accommodating cavity 111 can accommodate the cooling structure 12 and the battery cell 13, then the extension portion 122 can also be integrated with the surrounding components of the case 11 of the battery 1 facing the second accommodating cavity 111, and the embodiment of the present disclosure does not limit this.

[0111] In the battery 1 provided in the embodiment of the present disclosure, the extension portion 122 is misaligned with the combined cooling avoidance area to avoid the extension portion 122 occupying the space of the combined cooling avoidance area, thereby ensuring that the space of the combined cooling avoidance area is used to set up the cooling structure 12, thereby increasing the cooling effect of the cooling structure 12.

[0112] 2 , 3 and 5 , an embodiment of the present disclosure provides a battery 1 , in which the axial direction of the opening 1221 is perpendicular to the extending direction of the cooling plate 121 .

[0113] The battery 1 provided in the embodiment of the present disclosure has an axial direction of the opening 1221 that is perpendicular to the extension direction of the cooling plate 121. In this way, the operator can provide liquid to or discharge liquid from the extension portion 122 in a direction perpendicular to the extension direction of the cooling plate 121. The direction perpendicular to the extension direction of the cooling plate 121 is parallel to the direction in which the first surface 1311 is recessed toward the first accommodating cavity and the direction in which the first accommodating cavity is toward the first surface 1311. This facilitates operation for the operator.

[0114] 2 , 4 , 7 and 8 , an embodiment of the present disclosure provides a battery 1 , in which the cooling avoidance area 13111 of each battery cell 13 does not penetrate the first surface 1311 thereof in a direction perpendicular to the arrangement direction in the direction in which the cooling avoidance area 13111 extends, and limit platforms are formed on both sides of the cooling avoidance area 13111 to limit the cooling structure 12 .

[0115] In the embodiment of the present disclosure, if the direction in which the first surface 1311 is recessed toward the first accommodating cavity is the height direction A of the battery cell 13, and the arrangement direction of at least two battery cells 13 is the thickness direction C of the battery cell 13, then in the direction in which the cooling avoidance area 13111 extends, the direction perpendicular to the arrangement square is the length direction B of the battery cell 13.

[0116] In the disclosed embodiment, limiting platforms are formed on both sides of the cooling avoidance area 13111. These limiting platforms can limit the cooling structure 12. Here, the outer contour of the limiting platforms can be a regular structure such as a cube or a cuboid, which facilitates processing and manufacturing. Of course, the outer contour of the limiting platforms can also be an irregular structure, which is not limited by the disclosed embodiment. Of course, the outer contours of the limiting platforms on both sides can have the same structure or different structures.

[0117] In the embodiment of the present disclosure, in the direction in which the cooling avoidance area 13111 extends, in the direction perpendicular to the arranged squares, the sizes of the limit platforms formed on both sides may be the same or different, and the embodiment of the present disclosure also does not impose any limitation on this.

[0118] In the battery 1 provided by the embodiment of the present disclosure, since the cooling avoidance area 13111 of each battery cell 13 does not penetrate its first surface 1311, limit platforms are formed on both sides of the cooling avoidance area 13111 to limit the cooling structure 12, thereby reducing the possibility of the cooling structure 12 falling off from the cooling avoidance area 13111.

[0119] 2 , 4 , 7 and 8 , an embodiment of the present disclosure provides a battery 1 , wherein in the direction in which the cooling avoidance area 13111 extends and in a direction perpendicular to the arrangement direction, the limiting platforms formed on both sides have the same size.

[0120] In the battery 1 provided in the embodiment of the present disclosure, the limit platforms formed on both sides have the same size and strength, thereby avoiding a situation where the size difference between the limit platforms on one side and the other side is too large, resulting in an excessive difference in strength between the limit platforms on both sides, making it impossible for the limit platform on one side to limit the cooling structure 12.

[0121] 1 and 2 , an embodiment of the present disclosure provides a battery 1, which includes a housing 11. The housing 11 forms a second accommodating cavity 111. A cooling structure 12 and a battery cell 13 are both accommodated in the second accommodating cavity 111. A first fixing structure is provided between the cooling structure 12 and the housing 11, and the cooling structure 12 is fixed to the housing 11 via the first fixing structure.

[0122] In the embodiment of the present disclosure, the box body 11 may include a lower box body and an upper cover. The lower box body 11 is provided with an opening 1221 , and the upper cover is provided on the lower box body 11 to close it, so as to form a second accommodating cavity 111 .

[0123] In the disclosed embodiment, the box body 11 can serve as a part of the chassis structure of the vehicle. For example, part of the box body 11 can become at least a part of the floor of the vehicle, or part of the box body 11 can become at least a part of the crossbeam and longitudinal beam.

[0124] In the embodiment of the present disclosure, the inner contour of the second accommodating cavity 111 can be a regular shape, such as a cube, a cuboid, a cylinder, etc. The inner contour of the second accommodating cavity 111 can also be an irregular shape. Here, it should be supplemented that the embodiment of the present disclosure does not limit the inner contour shape of the second accommodating cavity 111.

[0125] In the embodiment of the present disclosure, a first fixing structure is provided between the cooling structure 12 and the box body 11, and the cooling structure 12 is fixed to the box body 11 through the first fixing structure. Since the adhesive fixing method has the advantages of convenient operation and low cost, specifically, the first fixing structure can be an adhesive layer, and the adhesive layer is provided between the cooling structure 12 and the box body 11, and the cooling structure 12 is adhesively fixed to the box body 11 through the adhesive layer.

[0126] In the embodiment of the present disclosure, a first fixing structure is provided between the cooling structure 12 and the box body 11, and the cooling structure 12 is fixed to the box body 11 through the first fixing structure. Compared with the adhesive fixation, the clamping fixation method is a detachable method, which can facilitate the operator to replace or repair the cooling structure 12 and the box body 11. Specifically, the first fixing structure can be a clamping protrusion provided on the box body 11 and a clamping groove provided on the cooling structure 12. The clamping protrusion is adapted to the clamping groove to clamp and fix the cooling structure 12 to the box body 11.

[0127] In the embodiment of the present disclosure, a first fixing structure is provided between the cooling structure 12 and the housing 11. The cooling structure 12 is fixed to the housing 11 via the first fixing structure. Compared to a clamping connection, a threaded fixing method is more secure. Specifically, the first fixing structure includes a first threaded hole provided on the housing 11, a second threaded hole provided on the cooling structure 12, and a threaded fastener. The threaded fastener is sequentially passed through the first threaded hole and the second threaded hole to threadably fix the cooling structure 12 to the housing 11. It should be noted that the embodiment of the present disclosure does not limit the fixing method of the cooling structure 12 to the housing 11.

[0128] In the embodiment of the present disclosure, in order to protect the internal components of the box body 11, absorb part of the impact and vibration, reduce the impact on the internal components of the box body 11, ensure the safety and stability of the battery 1, and at the same time, increase the height of the battery 1, an expansion beam is also provided on the side of the box body 11 close to the second accommodating cavity 111, and a first fixing structure is provided between the expansion beam and the cooling structure 12 to fix the cooling structure 12 on the expansion beam.

[0129] In the battery 1 provided in the embodiment of the present disclosure, a first fixing structure is provided between the cooling structure 12 and the housing 11 , and the cooling structure 12 is fixed to the housing 11 via the first fixing structure. This can increase the overall structural strength of the battery 1 and improve the main vibration frequency.

[0130] 1 and 2 , an embodiment of the present disclosure provides a battery 1, wherein a first fixing structure includes a first threaded hole provided on a case 11, a second threaded hole provided on a cooling structure 12, and a threaded fastener, wherein the threaded fastener passes through the first threaded hole and the second threaded hole in sequence to threadably fix the cooling structure 12 and the case 11.

[0131] The battery 1 provided in the embodiment of the present disclosure has a cooling structure 12 and a housing 11 fixed thereto by screw threads. On the one hand, the cooling structure 12 and the housing 11 are fixed more securely. On the other hand, the screw thread fixing is detachable, which facilitates later disassembly for maintenance of the cooling structure 12 and the housing 11.

[0132] 4 , an embodiment of the present disclosure provides a battery 1 , wherein an adhesive layer is provided between the cooling structure 12 and the cooling avoidance area 13111 , and the cooling structure 12 is bonded to the cooling avoidance area 13111 via the adhesive layer.

[0133] In the embodiment of the present disclosure, an adhesive layer is provided between the cooling structure 12 and the cooling avoidance area 13111. Here, the adhesive layer refers to a layered structure formed by various colloids with adhesive properties during the bonding process. For example, if an adhesive is applied to the cooling avoidance area 13111, and then the cooling structure 12 is placed in the cooling avoidance area 13111 coated with the adhesive, the cooling structure 12 is bonded to the cooling avoidance area 13111 by the adhesive, and a layered structure is formed after the adhesive is cured. It should be noted that the adhesive layer can also conduct heat, so that the heat of the shell can be easily transferred to the cooling structure 12 by the adhesive layer.

[0134] In the battery 1 provided in the embodiment of the present disclosure, an adhesive layer is provided between the cooling structure 12 and the cooling avoidance area 13111, and the cooling structure 12 is adhered to the cooling avoidance area 13111 through the adhesive layer. In this way, the shaking of the cooling structure 12 in the cooling avoidance area 13111 can be reduced.

[0135] An embodiment of the present disclosure provides an electrical device, which includes the battery 1 provided by any embodiment of the first aspect for providing electrical energy.

[0136] In the embodiments of the present disclosure, the electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, 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. The spacecraft may include an airplane, a rocket, a space shuttle, or a spacecraft, etc.

[0137] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present disclosure, and they should all be included in the scope of the claims and specification of the present disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery (1), comprising: Cooling structure (12); A battery cell (13), wherein the battery cells (13) are at least two and arranged in sequence (C), the battery cell (13) comprises a shell (131) and an electrode assembly, a first accommodating cavity is formed in the shell (131), the first accommodating cavity is used to accommodate the electrode assembly, the shell (131) has a first surface (1311), the first surface (1311) corresponding to at least one of the battery cells (13) is recessed (A) toward the first accommodating cavity to form a cooling avoidance area (13111), and the cooling structure (12) is provided in each of the cooling avoidance areas (13111).

2. The battery (1) according to claim 1, wherein Along the direction (A) of the first surface (1311) toward the first accommodating cavity, the depth dimension of the cooling avoidance area (13111) is greater than or equal to the dimension of the cooling structure (12), and the surface of the cooling structure (12) away from the cooling avoidance area (13111) is lower than or flush with the surface of the non-recessed area (13112) of the first surface (1311).

3. The battery (1) according to claim 1 or 2, wherein: Along the extension direction (B) of the first surface, the size of the cooling avoidance area (13111) is larger than the size of the cooling structure (12), and an avoidance gap exists between the cooling structure (12) and the cooling avoidance area (13111).

4. The battery according to claim 2 or 3, wherein The portion of the cooling avoidance area (13111) adjacent to the non-recessed area of ​​the first surface (1311) forms a guide surface (134), and the guide surface (134) extends toward the middle of the cooling avoidance area (13111).

5. The battery (1) according to any one of claims 1 to 4, wherein The surface of the cooling structure (12) facing the cooling avoidance area (13111) is a smooth plane, the surface of the cooling avoidance area (13111) facing the cooling structure (12) is a smooth plane, and the cooling structure (12) is in abutment contact with the cooling avoidance area (13111).

6. The battery (1) according to any one of claims 1 to 5, wherein The battery cell (13) further comprises a tab (132, 133) connected to the electrode assembly, the housing (131) having a second surface (13121, 13122), the tab (132, 133) being arranged on the second surface (13121, 13122), and the second surface (13121, 13122) being in non-surface contact with the cooling structure (12).

7. The battery (1) according to any one of claims 1 to 6, wherein Along the arrangement direction (C) of at least two battery cells, the cooling avoidance area (13111) on each battery cell (13) passes through the first surface (1311) thereof, and a plurality of the cooling avoidance areas (13111) are connected to form a combined cooling avoidance area. There is one cooling structure (12), and the cooling structure (12) is arranged in the combined cooling avoidance area.

8. The battery (1) according to claim 7, wherein The cooling structure (12) comprises a cooling plate (121) and an extension portion (122), wherein the extension portion (122) is arranged on at least one side of the cooling plate (121) along an extension direction (C) of the cooling plate (121), the extension portion (122) is communicated with the cooling plate (121), an opening (1221) is provided on the extension portion (122), the cooling plate (122) is arranged in the combined cooling avoidance area, and the extension portion (122) is offset from the combined cooling avoidance area.

9. The battery (1) according to claim 8, wherein The axial direction of the opening (1221) is perpendicular to the extension direction (C) of the cooling plate (121).

10. The battery (1) according to any one of claims 7 to 9, wherein: In the direction (C) in which the cooling avoidance area (13111) extends, in the direction (B) perpendicular to the arrangement direction, the cooling avoidance area (13111) of each battery cell (13) does not penetrate the first surface (1311) thereof, and limiting platforms are formed on both sides of the cooling avoidance area (13111) to limit the cooling structure.

11. The battery (1) according to claim 10, wherein In the direction (C) in which the cooling avoidance area (13111) extends and in the direction (B) perpendicular to the arrangement direction, the sizes of the limit platforms formed on both sides are the same.

12. The battery (1) according to any one of claims 1 to 11, wherein The battery comprises a box (11), the box (11) forming a second accommodating cavity (111), the cooling structure (12) and the battery cell (13) both being accommodated in the second accommodating cavity (111), a first fixing structure being provided between the cooling structure (12) and the box (11), and the cooling structure (12) being fixed to the box (11) via the first fixing structure.

13. The battery (1) according to claim 12, wherein The first fixing structure comprises a first threaded hole provided on the box body (11), a second threaded hole provided on the cooling structure (12), and a threaded fastener, wherein the threaded fastener passes through the first threaded hole and the second threaded hole in sequence to threadably fix the cooling structure (12) and the box body (11).

14. The battery (1) according to any one of claims 1 to 13, wherein An adhesive layer is provided between the cooling structure (12) and the cooling avoidance area (13111), and the cooling structure (12) is bonded to the cooling avoidance area (13111) via the adhesive layer.

15. An electrical device comprising: The battery (1) according to any one of claims 1 to 14, for providing electrical energy.

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