Battery box body, battery and power utilization device

Abstract

The utility model discloses a battery box body, a battery and a power utilization device, and relates to the technical field of batteries. According to the battery box body, the corrosion risk of the battery box body can be reduced, and the service life of the battery box body can be prolonged. The battery box body comprises a frame, a bottom plate assembly and a first sealing piece, wherein the frame comprises a containing space defined by a plurality of frame bodies, and a first opening is formed in one end of the frame; the bottom plate assembly covers the first opening; the first sealing piece is arranged on the edge of the bottom plate assembly and the frame body and used for sealing the edge of the bottom plate assembly and sealing the position between the bottom plate assembly and the frame body. The battery box body provided by the utility model is used for accommodating and bearing the battery monomers.

Description

Technical Field

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

[0002] 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.

[0003] In the related art, multiple battery cells are installed on electrical devices such as vehicles by using a battery case. In the process of manufacturing the battery case, the sheet metal for manufacturing the battery case needs to be cut according to the size and shape of the battery case. The cut edges of the sheet metal after cutting, as well as the connection positions between the sheet metal and other structural parts in the battery case, are prone to corrosion, which will affect the service life of the battery case. Utility Model Content

[0004] The present application provides a battery box, a battery and an electrical device, which can reduce the risk of corrosion of the battery box and help to increase the service life of the battery box.

[0005] The first aspect of the present application provides a battery case, which includes: a frame, a bottom plate assembly and a first seal; wherein the frame includes a accommodating space formed by a plurality of frame bodies, and one end of the frame has a first opening; the bottom plate assembly covers the first opening; the first seal is arranged on the edge of the bottom plate assembly and the frame, and is used to seal the edge of the bottom plate assembly and between the bottom plate assembly and the frame.

[0006] The battery box provided by the present application, due to the provision of a frame, can be enclosed by the frame in the frame to form a storage space for accommodating the battery monomer, and the frame can be used to support the entire battery box, so that the battery box has a stable shape. In addition, a bottom plate assembly is provided on the first opening of the frame, and the first opening can be blocked and covered by the bottom plate assembly, so that the battery box can be formed into a semi-enclosed shape to better accommodate and protect the battery monomer. At the same time, a first seal is provided on the edge of the bottom plate assembly and the frame, and the first seal can not only seal the edge of the bottom plate assembly, so as to isolate the edge of the bottom plate assembly from the air, which is conducive to reducing the contact between the edge of the bottom plate assembly and items such as air and water, thereby reducing the risk of corrosion of the edge of the bottom plate assembly; and the gap between the bottom plate assembly and the frame can be blocked and sealed by the first seal, which is conducive to improving the sealing performance of the battery box. Therefore, the battery box provided by the present application can reduce the risk of corrosion of the battery box, which is conducive to improving the service life of the battery box.

[0007] In a possible implementation of the present application, in the axial direction along the frame, the orthographic projections of the side walls of the base plate assembly on the frame are all located on the frame body, and in the radial direction along the frame, the side walls of the base plate assembly are closer to the accommodating space than the outer side of the frame body; wherein the side walls of the base plate assembly are the wall surfaces on the base plate assembly in the radial direction, and the outer side of the frame body is the side of the frame body away from the accommodating space.

[0008] In the technical solution of the present application, since the bottom plate assembly is arranged so that the orthographic projections of the side walls of the bottom plate assembly on the frame are all located on the frame, and the side walls of the bottom plate assembly are closer to the accommodating space than the outer side of the frame, a portion of the frame adjacent to the side walls of the bottom plate assembly can be not covered by the bottom plate assembly, thereby increasing the contact area between the first seal and the frame in the radial direction along the frame, which is beneficial to improving the connection strength between the first seal and the frame.

[0009] In a possible implementation of the present application, the bottom plate assembly includes a bottom guard plate, and the bottom guard plate covers the first opening.

[0010] In the technical solution of the present application, since a bottom guard plate is provided in the bottom plate assembly, the bottom guard plate can not only seal and cover the first opening of the frame, but also provide protection for the battery box to reduce the risk of damage to the battery cells in the battery box due to impact by hard objects.

[0011] In a possible implementation of the present application, the base plate assembly also includes a heat dissipation assembly, which is arranged between the first opening and the bottom guard plate; wherein, in the radial direction along the frame, the side wall of the bottom guard plate is closer to the accommodating space than the side wall of the heat dissipation assembly.

[0012] In the technical solution of the present application, since a heat dissipation assembly is provided in the bottom plate assembly, the heat dissipation assembly can be used to dissipate heat and cool down the battery cells contained in the battery box, so that the temperature of the battery cells in the battery box can be maintained within a suitable range. At the same time, the bottom guard plate is arranged so that the side wall of the bottom guard plate is closer to the accommodation space than the side wall of the heat dissipation assembly, so that a part of the edge of the heat dissipation assembly is not covered by the bottom guard plate, thereby increasing the connection area between the first seal and the heat dissipation assembly, and further improving the connection strength between the first seal and the heat dissipation assembly.

[0013] In a possible implementation of the present application, the heat dissipation assembly includes a first heat dissipation element and a second heat dissipation element that are at least partially attached to each other, a heat dissipation channel is provided between the first heat dissipation element and the second heat dissipation element, the first heat dissipation element abuts against the frame, and the bottom guard plate abuts against the second heat dissipation element; wherein, in the radial direction along the frame, the side wall of the second heat dissipation element is closer to the accommodation space than the side wall of the first heat dissipation element, and the side wall of the bottom guard plate is closer to the accommodation space than the side wall of the second heat dissipation element.

[0014] In the technical solution of the present application, since the heat dissipation assembly is configured to include a first heat dissipation element and a second heat dissipation element, a heat dissipation channel can be formed between the first heat dissipation element and the second heat dissipation element, so that a coolant can be arranged in the heat dissipation channel, which is beneficial to improving the heat dissipation efficiency of the heat dissipation assembly. At the same time, the first heat dissipation element, the second heat dissipation element and the bottom guard plate are configured such that the side wall of the second heat dissipation element is closer to the accommodation space than the side wall of the first heat dissipation element, and the side wall of the bottom guard plate is closer to the accommodation space than the side wall of the heat dissipation assembly, so that a part of the edge of the first heat dissipation element and the second heat dissipation element is not covered, thereby increasing the connection area between the first seal and the first heat dissipation element and the second heat dissipation element, and further improving the connection strength between the first seal and the first heat dissipation element and the second heat dissipation element, thereby providing a more reliable seal for the edge of the first heat dissipation element and the second heat dissipation element.

[0015] In a possible implementation of the present application, in the radial direction along the frame, the width of the portion where the first seal is connected to the frame body is greater than or equal to two-fifths of the width of the first seal; and / or the width of at least one portion of the two portions where the first seal is respectively connected to the first heat sink and the second heat sink is greater than or equal to one-fifth of the width of the first seal.

[0016] In the technical solution of the present application, since the width of the connection between the first seal and the frame is limited to two-fifths of the width of the first seal, and the width of the connection between the first seal and the first heat sink, the second heat sink and the bottom guard plate are respectively limited to one-fifth of the width of the first seal, the first seal can have sufficient connection areas with the frame, the first heat sink, the second heat sink and the bottom guard plate, thereby improving the connection strength between the first seal and the frame, the first heat sink, the second heat sink and the bottom guard plate, and further providing more reliable sealing for the side walls of the first heat sink, the second heat sink and the bottom guard plate.

[0017] In a possible implementation of the present application, in the radial direction along the frame, the width of the portion where the first seal is connected to the frame body is greater than or equal to 5 mm; and / or the width of the portions where the first seal is connected to the first heat sink and the second heat sink, respectively, are both greater than or equal to 2 mm.

[0018] In the technical solution of the present application, since the width of the portion where the first seal is connected to the frame is set to 5 mm, and the width of the portions where the first seal is connected to the first heat sink and the second heat sink respectively is set to 2 mm, the first seal can have sufficient connection strength with the frame, the first heat sink and the second heat sink respectively, while the amount of the first seal can be reduced.

[0019] In a possible implementation of the present application, an adhesive seal is provided between the first heat dissipation element and the frame, and the adhesive seal is used to adhesively connect the first heat dissipation element to the frame.

[0020] In the technical solution of the present application, since an adhesive seal is provided between the first heat sink and the frame, the first heat sink and the frame can be reliably bonded to each other through the adhesive seal so as to bond and fix the two together; at the same time, the gap between the frame and the first heat sink can also be sealed through the adhesive seal to improve the sealing performance of the battery box.

[0021] In a possible implementation of the present application, a first filling seal is further provided between the frame and the first heat sink, and the first filling seal is used to fill and seal a gap between the frame and the first heat sink near the accommodating space.

[0022] In the technical solution of the present application, since a first filling seal is provided between the frame and the first heat sink, the first filling seal can be used to isolate and seal the accommodating space and the joint between the first heat sink and the frame, thereby better sealing the battery box.

[0023] In a possible implementation of the present application, a second filling seal is provided between the second heat dissipation element and the bottom guard plate, and the second filling seal is used to fill and seal the gap between the second heat dissipation element and the bottom guard plate.

[0024] In the technical solution of the present application, since a second filling seal is provided between the second heat sink and the bottom guard plate, the second filling seal can provide additional sealing between the second heat sink and the bottom guard plate, thereby improving the reliability of the sealing between the second heat sink and the bottom guard plate.

[0025] In a possible implementation of the present application, the bottom plate assembly further includes a protective layer, which covers the surface of the bottom guard plate away from the frame, and the protective layer is used to isolate the bottom guard plate from the air.

[0026] In the technical solution of the present application, since a protective layer is provided on the surface of the bottom guard plate away from the frame, the protective layer can be used to prevent corrosion of the surface of the bottom guard plate away from the frame, and the protective layer has a certain elasticity, which can reduce the risk of damage to the bottom guard plate caused by impact from other objects.

[0027] In a possible implementation of the present application, a first connecting portion is provided on a portion of the frame corresponding to the base plate assembly, and a first fastener adapted to the first connecting portion passes through the base plate assembly and is connected to the first connecting portion to fix the base plate assembly to the frame.

[0028] In the technical solution of the present application, since a first connecting portion is provided on the frame, a first fastener adapted to the first connecting portion can be used to fix the base plate assembly to the frame, thereby allowing the base plate assembly to be connected to the frame as a whole, which is beneficial to improving the reliability of the connection between the base plate assembly and the frame.

[0029] In a possible implementation of the present application, the battery box also includes a cover body, the end of the frame away from the first opening has a second opening, and the cover body covers the second opening; a third filling seal is arranged between the cover body and the frame body, and the third filling seal is used to fill and seal the gap between the cover body and the frame body.

[0030] In the technical solution of the present application, since a cover is provided on the second opening of the frame, a battery box with a closed accommodation space can be formed by enclosing the cover, the frame and the bottom plate assembly. A third filling seal is provided between the cover and the frame to seal the gap between the cover and the frame, so that the accommodation space in the battery box can be a sealed space, and further the battery monomers in the accommodated battery box can be isolated from the outside.

[0031] In a possible implementation of the present application, a second connecting portion is provided on a portion of the frame corresponding to the cover, and a second fastener adapted to the second connecting portion passes through the cover and is connected to the second connecting portion to fix the cover and the frame.

[0032] In the technical solution of the present application, since a second connecting portion is provided on the frame, a second fastener adapted to the second connecting portion can be used to fix the cover body and the frame body, so that the cover body and the frame body can be connected as a whole, which is beneficial to improving the reliability of the connection between the cover body and the frame body.

[0033] In a possible implementation of the present application, the frame is formed by bending and enclosing plates, and the cross-section of the frame is a closed annular structure.

[0034] In the technical solution of the present application, since the frame is formed into a structure with a ring-shaped cross section by bending and enclosing the plate parts, compared with the aluminum profile box used in the related art, the frame has higher strength, smaller size and lower manufacturing cost; and compared with the stamped box in the related art, the frame is not only stronger, but also can shorten the design time and reduce the design cost.

[0035] In a possible implementation of the present application, a reinforcement portion is provided in the frame, and the reinforcement portion is integrally formed with the frame.

[0036] In the technical solution of the present application, since a reinforcement part is provided in the frame, the overall rigidity and torsional strength of the frame can be improved through the reinforcement part, thereby improving the load-bearing capacity and strength of the battery box.

[0037] In a second aspect, the present application provides a battery, comprising: a battery cell and a battery case provided by any one of the first aspects, wherein the battery cell is accommodated in a accommodating space of the battery case.

[0038] The battery provided in the present application includes the battery case provided in the first aspect above, and therefore can reduce the risk of corrosion of the battery case, which is beneficial to increasing the service life of the battery case, and further increasing the service life of the battery.

[0039] In a third aspect, the present application provides an electrical device, the electrical device comprising the battery provided in the second aspect of the present application for providing electrical energy.

[0040] The electrical device provided in the present application includes the battery provided in the second aspect, and therefore can reduce the risk of corrosion of the battery case, which is beneficial to increasing the service life of the battery, and further increasing the service life of the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0042] Figure 1 A schematic diagram of the structure of the battery box provided for this application;

[0043] Figure 2 A schematic diagram of the structure of the frame of the battery box provided in this application;

[0044] Figure 3 A partial cross-sectional view of the battery box provided in this application Figure 1 ;

[0045] Figure 4 Provided for this application Figure 3 A magnified schematic diagram of part A;

[0046] Figure 5 A partial cross-sectional view of the battery box provided in this application Figure 2 ;

[0047] Figure 6 A partial cross-sectional view of the battery box provided in this application Figure 3 ;

[0048] Figure 7 A partial schematic diagram of the frame of the battery box provided in this application.

[0049] Description of reference numerals:

[0050] 1-frame; 11-frame; 111-plate; 112-reinforcement part; 12-accommodating space; 13-first opening; 14-second opening; 2-bottom plate assembly; 21-bottom guard plate; 22-heat dissipation assembly; 221-first heat dissipation element; 222-second heat dissipation element; 23-protective layer; 3-first seal; 41-adhesive seal; 42-first filling seal; 43-second filling seal; 44-third filling seal; 51-first connecting part; 52-first fastener; 6-cover; 71-second connecting part; 72-second fastener; B-radial direction; C-axial direction; D-width of the first seal; E-width of the first seal connected to the frame; F-width of the first seal connected to the first heat dissipation element; G-width of the first seal connected to the second heat dissipation element; H-width of the first seal connected to the bottom guard plate. DETAILED DESCRIPTION

[0051] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field 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" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0053] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0054] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y may represent: X exists alone, X and Y exist at the same time, and Y exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0056] In the description of the embodiments of the present application, the orientation or position relationship 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 orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0057] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0058] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0059] Below, this application is described in detail.

[0060] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0061] In many application scenarios, a battery case is provided for the battery cells in the battery, and the battery case accommodates and seals the battery cells to provide load-bearing support and protection for the battery cells. However, the battery is usually in an environment that is polluted by dust, water, splashing, or even immersed in water for a long time. The connection parts of the various structural parts in the battery case, as well as the cut edges of the various structural parts, will corrode due to the harsh use environment, and the seals between the various structural parts in the battery case may fail due to the corrosion of the structural parts. This will affect the quality of the battery case and shorten the service life of the battery case. Therefore, there is a need for a battery case that can improve the anti-corrosion and sealing properties to extend the service life.

[0062] The present application embodiment provides a battery box, referring to Figure 1 , Figure 2 and Figure 3 , Figure 1 A schematic diagram of the structure of the battery box provided in this application, Figure 2 This is a schematic diagram of the structure of the frame of the battery box provided in this application. Figure 3 A partial cross-sectional view of the battery box provided in this application Figure 1 The battery box provided in the embodiment of the present application includes: a frame 1, a bottom plate assembly 2 and a first seal 3; wherein the frame 1 includes a receiving space 12 formed by a plurality of frames 11, and one end of the frame 1 has a first opening 13; the bottom plate assembly 2 covers the first opening 13; the first seal 3 is arranged on the edge of the bottom plate assembly 2 and the frame 11, and is used to seal the edge of the bottom plate assembly 2 and between the bottom plate assembly 2 and the frame 11.

[0063] In the embodiment of the present application, the frame 1 is used to form a storage space 12 for accommodating a battery cell, and the frame 1 can be formed by enclosing a plurality of frames 11. For example, a plurality of frames 11 made of metal materials are used, and the plurality of frames 11 are sequentially connected to form an annular frame 1, such as an annular frame 1 with a shape similar to a rectangle, and a storage space 12 for accommodating a battery cell is formed in the center of the annular frame 1 by enclosing a plurality of frames 11. In this way, Figure 2 As shown, along the axial direction C of the frame 1 , a first opening 13 and a second opening 14 are respectively provided at two ends of the frame 1 .

[0064] In the embodiment of the present application, the bottom plate assembly 2 is used to block and seal the first opening 13 of the frame 1. The bottom plate assembly 2 can be covered on the first opening 13 of the frame 1, and the bottom plate assembly 2 is fixedly connected to the frame 11, that is, the edge of the bottom plate assembly 2 is abutted and fixedly connected to the frame 11. For example, the bottom plate assembly 2 can be a sheet metal part that blocks the first opening 13; or it can be a heat dissipation device that blocks the first opening 13 and dissipates heat and cools the battery cells installed in the accommodating space 12 of the frame 1.

[0065] In the present application, refer to Figure 4 , Figure 4 Provided for this application Figure 3 The enlarged schematic diagram of part A in FIG. Figure 3 and Figure 4 As shown, after the bottom plate assembly 2 is covered on the first opening 13 of the frame 1, the bottom plate assembly 2 is in contact with one side of the frame 11 in the axial direction C along the frame 1; and the side wall of the bottom plate assembly 2 away from the center is exposed in the radial direction B along the frame 1. A first sealing member 3 can be provided, and the first sealing member 3 is provided at the position where the edge of the bottom plate assembly 2 and the frame 11 are connected, and the first sealing member 3 covers the edge of the bottom plate assembly 2 and a part of the frame 11 at the same time. For example, the first sealing member 3 can be made of polyvinyl chloride (PVC) sealant, and the PVC sealant is applied to the edge of the bottom plate assembly 2 and the area of ​​the frame 11 adjacent to the edge of the bottom plate assembly 2, so as to seal the edge of the bottom plate assembly 2 and the gap between the bottom plate assembly 2 and the frame 11.

[0066] The battery box provided in the embodiment of the present application is provided with a frame 1, and the frame 11 in the frame 1 can enclose a storage space 12 for accommodating battery cells, and the frame 1 can support the entire battery box so that the battery box has a stable shape. In addition, a bottom plate assembly 2 is provided on the first opening 13 of the frame 1, and the first opening 13 can be blocked and covered by the bottom plate assembly 2, so that the battery box can be formed into a closed shape to better accommodate and protect the battery cells. At the same time, a first seal 3 is provided on the edge of the bottom plate assembly 2 and the frame 11, and the first seal 3 can not only seal the edge of the bottom plate assembly 2, so as to isolate the edge of the bottom plate assembly 2 from the air, which is conducive to reducing the contact between the edge of the bottom plate assembly 2 and items such as air and water, thereby reducing the risk of corrosion of the edge of the bottom plate assembly 2; and the first seal 3 can be used to block and seal the gap between the bottom plate assembly 2 and the frame 11, which is conducive to improving the sealing performance of the battery box. Therefore, the battery box provided in the embodiment of the present application can reduce the risk of corrosion of the battery box, which is conducive to improving the service life of the battery box.

[0067] In some embodiments of the present application, in the axial direction C along the frame 1, the orthographic projections of the side walls of the base plate assembly 2 on the frame 1 are all located on the frame body 11, and in the radial direction B along the frame 1, the side walls of the base plate assembly 2 are closer to the accommodating space 12 than the outer side of the frame body 11; the side walls of the base plate assembly 2 are the wall surfaces of the base plate assembly 2 along the radial direction B of the frame 1, and the outer side of the frame body 11 is the side of the frame body 11 away from the accommodating space 12.

[0068] In the present application embodiment, Figure 3 and Figure 4 As shown, when setting the bottom plate assembly 2, the bottom plate assembly 2 can be set to be smaller than the frame 1, so that the bottom plate assembly 2 can not only cover the first opening 13 of the frame 1, but also the edge portion of the bottom plate assembly 2 will not exceed the edge of the frame 11.

[0069] Illustratively, in the axial direction C along the frame 1, the bottom plate assembly 2 completely covers the first opening 13 of the frame 1, and the edge portion of the bottom plate assembly 2 abuts against the frame body 11, and the portion where the bottom plate assembly 2 abuts against the frame body 11 surrounds the frame 1.

[0070] In another example, along the radial direction B of the frame 1, the edge of the bottom plate assembly 2 can be made to fit and abut against the frame 11, and the contour of the bottom plate assembly 2 is smaller than the contour of the frame 11. In this way, along the radial direction B of the frame 1, a part of the frame 11 away from the accommodating space 12 cannot be covered by the bottom plate assembly 2, so that a step structure can be formed on the bottom plate assembly 2 and the frame 11, and the first sealing member 3 is covered on the step structure.

[0071] In the above embodiment, since the bottom plate assembly 2 is configured such that the positive projections of the side walls of the bottom plate assembly 2 on the frame 1 are all located on the frame 11, and the side walls of the bottom plate assembly 2 are closer to the accommodating space 12 than the outer side of the frame 11, a portion of the frame 11 adjacent to the side walls of the bottom plate assembly 2 can be not covered by the bottom plate assembly 2, thereby increasing the contact area between the first seal 3 and the frame 11 in the radial direction B along the frame 1, which is beneficial to improving the connection strength between the first seal 3 and the frame 11.

[0072] In some embodiments of the present application, the bottom plate assembly 2 includes a bottom guard plate 21 , and the bottom guard plate 21 covers the first opening 13 .

[0073] In the present application embodiment, Figure 3 and Figure 4As shown, a bottom guard plate 21 can be provided in the bottom plate assembly 2, and according to the contour shape of the frame 11 in the radial direction B along the frame 1, the bottom guard plate 21 can be cut into a shape that matches the contour of the frame 1. For example, the bottom guard plate 21 can be made of galvanized aluminum plate.

[0074] For example, convex ribs or grooves may be provided on the bottom guard plate 21 to form a surface of the bottom guard plate 21 with an uneven structure, thereby improving the strength of the bottom guard plate 21. The bottom guard plate 21 is covered on the first opening 13, and the edge of the bottom guard plate 21 is fixedly connected to the corresponding portion of the frame 11 and the frame 11, so as to fix the bottom guard plate 21 to the frame 1.

[0075] In the above embodiment, since a bottom guard plate 21 is provided in the bottom plate assembly 2, the bottom guard plate 21 can not only seal and cover the first opening 13 of the frame 1, but also provide protection for the battery box to reduce the risk of damage to the battery cells in the battery box due to impact by hard objects.

[0076] In some embodiments of the present application, the base plate assembly 2 also includes a heat dissipation assembly 22, which is disposed between the first opening 13 and the bottom guard plate 21; wherein, in the radial direction B along the frame 1, the side wall of the bottom guard plate 21 is closer to the accommodating space 12 than the side wall of the heat dissipation assembly 22.

[0077] In the present application embodiment, Figure 3 and Figure 4 As shown, a heat dissipation component 22 may be provided in the bottom plate component 2, and the heat dissipation component 22 may be connected to the frame 1 in a close fit, and the bottom guard plate 21 may be provided on a side of the heat dissipation component 22 away from the frame 1. For example, the heat dissipation component 22 may adopt a heat dissipation device in a water-cooled, oil-cooled, air-cooled or other structural forms.

[0078] Exemplarily, when the heat dissipation assembly 22 and the bottom guard plate 21 are arranged, in the radial direction B along the frame 1, the side wall of the heat dissipation assembly 22 is arranged to be closer to the accommodation space 12 than the outer side of the frame 11, and at the same time, the side wall of the bottom guard plate 21 is arranged to be closer to the accommodation space 12 than the side wall of the heat dissipation assembly 22; that is, the contour of the heat dissipation assembly 22 is smaller than the outer contour of the frame 11, and the contour of the bottom guard plate 21 is smaller than the contour of the heat dissipation assembly 22. In this way, the edges of the frame 11, the heat dissipation assembly 22 and the bottom guard plate 21 form a two-step step structure, and the first sealing member 3 covers the two-step step structure.

[0079] In the above embodiment, since the heat dissipation assembly 22 is provided in the bottom plate assembly 2, the heat dissipation assembly 22 can be used to dissipate heat and cool down the battery cells contained in the battery box, so that the temperature of the battery cells in the battery box can be maintained within a suitable range. At the same time, the bottom guard plate 21 is arranged so that the side wall of the bottom guard plate 21 is closer to the accommodation space 12 than the side wall of the heat dissipation assembly 22, so that a part of the edge of the heat dissipation assembly 22 is not covered by the bottom guard plate 21, thereby increasing the connection area between the first seal 3 and the heat dissipation assembly 22, and further improving the connection strength between the first seal 3 and the heat dissipation assembly 22.

[0080] In some embodiments of the present application, the heat dissipation assembly 22 includes a first heat dissipation member 221 and a second heat dissipation member 222 that are at least partially attached to each other, a heat dissipation channel is provided between the first heat dissipation member 221 and the second heat dissipation member 222, the first heat dissipation member 221 is abutted against the frame body 11, and the bottom guard plate 21 is abutted against the second heat dissipation member 222; wherein, in the radial direction B along the frame 1, the side wall of the second heat dissipation member 222 is closer to the accommodating space 12 than the side wall of the first heat dissipation member 221, and the side wall of the bottom guard plate 21 is closer to the accommodating space 12 than the side wall of the second heat dissipation member 222.

[0081] In the present application embodiment, Figure 3 and Figure 4 As shown, the heat dissipation assembly 22 can be set to a structural form including a first heat dissipation member 221 and a second heat dissipation member 222, wherein a portion of the first heat dissipation member 221 and the second heat dissipation member 222 are bonded together, and a cavity is formed in the unbonded area between the first heat dissipation member 221 and the second heat dissipation member 222, and the cavity is used as a heat dissipation channel, and a coolant can be set in the heat dissipation channel. For example, the first heat dissipation member 221 and the second heat dissipation member 222 can both be made of aluminum plates, and the coolant can be water, so the heat dissipation assembly 22 can be a water-cooled assembly.

[0082] Exemplarily, the first heat sink 221 can be set to be in a flat plate shape, and the first heat sink 221 is closely connected to the frame 11, and the bottom guard plate 21 is set on the side of the second heat sink 222 away from the frame 11. In addition, in the radial direction B along the frame 1, the side wall of the first heat sink 221 is indented toward the accommodation space 12 by a certain width than the outer side of the frame 11, the side wall of the second heat sink 222 is also indented toward the accommodation space 12 by a certain width than the side wall of the first heat sink 221, and the side wall of the bottom guard plate 21 is also indented toward the accommodation space 12 by a certain width than the side wall of the second heat sink 222; that is, the contour of the first heat sink 221 is smaller than the outer contour of the frame 11, the contour of the second heat sink 222 is smaller than the contour of the first heat sink 221, and the contour of the bottom guard plate 21 is smaller than the contour of the second heat sink 222. In this way, the edges of the frame 11 , the first heat sink 221 , the second heat sink 222 and the bottom guard plate 21 form a three-step step structure, and the first sealing member 3 covers the three-step step structure.

[0083] In the above embodiment, since the heat dissipation assembly 22 is configured to include a first heat dissipation element 221 and a second heat dissipation element 222, a heat dissipation channel can be formed between the first heat dissipation element 221 and the second heat dissipation element 222, so that a coolant can be arranged in the heat dissipation channel, which is beneficial to improving the heat dissipation efficiency of the heat dissipation assembly 22. At the same time, the first heat dissipation element 221, the second heat dissipation element 222 and the bottom guard plate 21 are configured such that: the side wall of the second heat dissipation element 222 is closer to the accommodation space 12 than the side wall of the first heat dissipation element 221, and the side wall of the bottom guard plate 21 is closer to the accommodation space 12 than the side wall of the heat dissipation assembly 22, so that a part of the edge of the first heat dissipation element 221 and the second heat dissipation element 222 is not covered, so that the connection area between the first sealing element 3 and the first heat dissipation element 221 and the second heat dissipation element 222 can be increased, and then the connection strength between the first sealing element 3 and the first heat dissipation element 221 and the second heat dissipation element 222 can be improved, so that a more reliable seal can be provided for the edge of the first heat dissipation element 221 and the second heat dissipation element 222.

[0084] In some embodiments of the present application, in the radial direction B along the frame 1, the width of the portion where the first seal 3 is connected to the frame body 11 is greater than or equal to two-fifths of the width D of the first seal; and / or the width of at least one portion of the two portions where the first seal 3 is respectively connected to the first heat sink 221 and the second heat sink 222 is greater than or equal to one-fifth of the width D of the first seal.

[0085] In the present application embodiment, Figure 4As shown, in order to make the connection between the first seal 3 and the base plate assembly 2 and the frame 11 closer, the width D of the first seal is generally 10 mm to 20 mm in the radial direction B along the frame 1. Setting the first seal 3 to such a wide edge can not only effectively ensure the connection strength between the first seal 3 and other structural members, but also provide close blocking and sealing for the joints between the various structural members.

[0086] For example, along the width direction of the frame 1, the distance that the first heat sink 221 is retracted toward the accommodation space 12 compared with the frame 11 can be greater than or equal to two-fifths of the width D of the first seal; the distance that the second heat sink 222 is retracted toward the accommodation space 12 compared with the first heat sink 221 can be greater than or equal to one-fifth of the width D of the first seal; and the distance that the bottom guard plate 21 is retracted toward the accommodation space 12 compared with the second heat sink 222 can be greater than or equal to one-fifth of the width D of the first seal. In this way, along the radial direction B of the frame 1, the width E of the connection between the first seal 3 and the frame 11 can be greater than or equal to two-fifths of the width D of the first seal; the width F of the connection between the first seal 3 and the first heat sink 221 can be greater than or equal to one-fifth of the width D of the first seal; the width G of the connection between the first seal 3 and the second heat sink 222 can be greater than or equal to one-fifth of the width D of the first seal; and the width H of the connection between the first seal 3 and the bottom guard plate 21 can also be greater than or equal to one-fifth of the width D of the first seal.

[0087] In the above embodiment, since the width of the connection between the first seal 3 and the frame 11 is limited to two-fifths of the width D of the first seal, and the widths of the connection between the first seal 3 and the first heat sink 221, the second heat sink 222 and the bottom guard plate 21 are respectively limited to one-fifth of the width D of the first seal, the first seal 3 can have sufficient connection areas with the frame 11, the first heat sink 221, the second heat sink 222 and the bottom guard plate 21, thereby improving the connection strength between the first seal 3 and the frame 11, the first heat sink 221, the second heat sink 222 and the bottom guard plate 21, and further providing more reliable sealing for the side walls of the first heat sink 221, the second heat sink 222 and the bottom guard plate 21.

[0088] In some embodiments of the present application, in the radial direction B along the frame 1, the width of the portion where the first seal 3 is connected to the frame body 11 is greater than or equal to 5 mm; and / or the width of the portions where the first seal 3 is connected to the first heat sink 221 and the second heat sink 222, respectively, are both greater than or equal to 2 mm.

[0089] In the present application embodiment, Figure 4As shown, in the radial direction B along the frame 1, the width D of the first sealing member can be set to 10 mm, or greater than 10 mm, wherein the width D of the first sealing member can be measured using a measuring tool such as a vernier caliper.

[0090] For example, the portion where the first seal 3 is connected to the frame 11 can be set to be greater than two-fifths of the width D of the first seal, that is, the portion where the first seal 3 is connected to the frame 11 is set to be greater than or equal to 5 mm. The width of the portion where the first seal 3 is connected to the first heat sink 221 and the second heat sink 222 is set to be greater than or equal to one-fifth of the width D of the first seal, that is, the width of the portion where the first seal 3 is connected to the first heat sink 221 and the second heat sink 222 is set to be greater than or equal to 2 mm.

[0091] In the above embodiment, since the width of the portion where the first seal 3 is connected to the frame 11 is set to 5 mm, and the width of the portions where the first seal 3 is connected to the first heat sink 221 and the second heat sink 222 respectively is set to 2 mm, the first seal 3 can have sufficient connection strength with the frame 11, the first heat sink 221 and the second heat sink 222 respectively, and the amount of the first seal 3 can be reduced.

[0092] In some embodiments of the present application, an adhesive seal 41 is disposed between the first heat dissipation member 221 and the frame body 11 , and the adhesive seal 41 is used to adhesively connect the first heat dissipation member 221 to the frame body 11 .

[0093] In the present application embodiment, Figure 3 and Figure 4 As shown, an adhesive seal 41 may be provided between the abutting surfaces of the first heat sink 221 and the frame 11, so that the first heat sink 221 and the frame 11 facing each other are bonded by the adhesive seal 41, and the gap between the first heat sink 221 and the frame 11 may also be sealed. For example, the adhesive seal 41 may be made of butyl rubber adhesive.

[0094] In the above embodiment, since an adhesive seal 41 is provided between the first heat sink 221 and the frame 11, the first heat sink 221 and the frame 11 can be reliably bonded by the adhesive seal 41 to bond and fix the two together; at the same time, the gap between the frame 11 and the first heat sink 221 can also be sealed by the adhesive seal 41 to improve the sealing performance of the battery case.

[0095] In some embodiments of the present application, a first filling seal 42 is further provided between the frame 11 and the first heat sink 221 , and the first filling seal 42 is used to fill and seal the gap between the frame 11 and the first heat sink 221 near the accommodating space 12 .

[0096] In the present application embodiment, Figure 3 As shown, a first filling seal 42 may be provided at one end of the connection surface between the frame 11 and the first heat sink 221 close to the accommodation space 12, and a portion of the first filling seal 42 is connected to the accommodation space 12. For example, the first filling seal 42 may be made of foamed silica gel.

[0097] Illustratively, a recessed portion can be provided on the frame 11 corresponding to the first heat sink 221 and close to the accommodating space 12, so that the distance between the frame 11 and the first heat sink 221 corresponding to the first heat sink 221 and close to the accommodating space 12 and the first heat sink 221 can be increased, so that sufficient first filling seal 42 can be filled between the larger gaps, which is beneficial to improving the reliability of filling the first filling seal 42.

[0098] In the above embodiment, since a first filling sealant 42 is provided between the frame 11 and the first heat dissipation member 221, the first filling sealant 42 can be used to isolate and seal the accommodating space 12 and the joint between the first heat dissipation member 221 and the frame 11, thereby better sealing the battery box.

[0099] In some embodiments of the present application, a second filling seal 43 is provided between the second heat dissipation element 222 and the bottom guard plate 21 , and the second filling seal 43 is used to fill and seal the gap between the second heat dissipation element 222 and the bottom guard plate 21 .

[0100] In the present application embodiment, Figure 3 As shown, a second filling sealant 43 may be filled in the gap between the second heat sink 222 and the bottom guard plate 21 close to the edge of the bottom guard plate 21 . For example, the second filling sealant 43 may be made of foamed silicone.

[0101] Exemplarily, in the circumferential direction along the frame 1 , the second filling seal 43 can be made to surround the frame 1 for one circle, so that an annular sealing belt can be formed between the second heat sink 222 and the bottom guard plate 21 through the second filling seal 43 .

[0102] In the above embodiment, since a second filling seal 43 is provided between the second heat sink 222 and the bottom guard plate 21, the second filling seal 43 can provide additional sealing between the second heat sink 222 and the bottom guard plate 21, thereby improving the reliability of the sealing between the second heat sink 222 and the bottom guard plate 21.

[0103] In some embodiments of the present application, the bottom plate assembly 2 further includes a protective layer 23 , which covers the surface of the bottom guard plate 21 away from the frame 1 , and the protective layer 23 is used to isolate the bottom guard plate 21 from the air.

[0104] In the present application embodiment, Figure 3 and Figure 4 As shown, a protective layer 23 can be provided in the bottom plate assembly 2, and the protective layer 23 can be provided on the surface of the bottom guard plate 21 away from the frame 1. For example, the protective layer 23 can be made of PVC sealant, and the PVC sealant can be evenly sprayed on the surface of the bottom guard plate 21, and the surface of the bottom guard plate 21 away from the frame 1 can be isolated from the air by the PVC sealant.

[0105] In the above embodiment, since a protective layer 23 is provided on the surface of the bottom guard plate 21 away from the frame 1, the surface of the bottom guard plate 21 away from the frame 1 can be anti-corroded by the protective layer 23, and the protective layer 23 has a certain elasticity, which can reduce the risk of the bottom guard plate 21 being damaged by being hit by other objects.

[0106] In some embodiments of the present application, reference Figure 5 , Figure 5 A partial cross-sectional view of the battery box provided in this application Figure 2 A first connection portion 51 is provided on the frame 11 at a portion corresponding to the bottom plate assembly 2 , and a first fastener 52 adapted to the first connection portion 51 passes through the bottom plate assembly 2 and is connected to the first connection portion 51 , so as to fix the bottom plate assembly 2 to the frame 11 .

[0107] In the present application embodiment, Figure 5 As shown, a first connecting portion 51 can be provided on the portion of the frame 11 that abuts against the base plate assembly 2. At the same time, a through hole can be provided on the base plate assembly 2 at a position corresponding to the first connecting portion 51. A first fastener 52 adapted to the first connecting portion 51 can be used, and the first fastener 52 can be passed through the through hole on the base plate assembly 2 and connected to the first connecting portion 51. In this way, the base plate assembly 2 and the frame 11 can be fixedly connected through the first connecting portion 51 and the first fastener 52.

[0108] For example, the first connection portion 51 may be a rivet nut provided on the frame 11, and the first fastener 52 may be a bolt adapted to the rivet nut. The first connection portion 51 may also be a riveted through hole provided on the frame 11, and the first fastener 52 may be a rivet adapted to the riveted through hole.

[0109] In the above embodiment, since the first connecting portion 51 is provided on the frame 11, the first fastener 52 adapted to the first connecting portion 51 can be used to fix the bottom plate assembly 2 and the frame 11, so that the bottom plate assembly 2 and the frame 11 can be connected as a whole, which is beneficial to improving the reliability of the connection between the bottom plate assembly 2 and the frame 11.

[0110] In some embodiments of the present application, reference Figure 6 , Figure 6A partial cross-sectional view of the battery box provided in this application Figure 3 The battery box also includes a cover 6, and the end of the frame 1 away from the first opening 13 has a second opening 14, and the cover 6 covers the second opening 14; a third filling seal 44 is provided between the cover 6 and the frame 11, and the third filling seal 44 is used to fill and seal the gap between the cover 6 and the frame 11.

[0111] In the present application embodiment, Figure 3 and Figure 6 As shown, a cover body 6 can be provided at one end of the frame 1 away from the bottom plate assembly 2 to cover and seal the second opening 14 of the frame 1 through the cover body 6, so that the battery box can be formed into a structure with a closed accommodating space 12.

[0112] For example, Figure 1 and Figure 6 As shown, a flange can be provided on the edge of the cover body 6, and after the cover body 6 is covered on the frame 1, the flange can limit the movement of the cover body 6 relative to the frame 1 in the radial direction B along the frame 1. The cover body 6 can also be provided with ribs and grooves so that the surface of the cover body 6 is formed into an uneven structure, which can increase the strength of the cover body 6.

[0113] Another example, such as Figure 3 and Figure 6 As shown, a third filling seal 44 can be set between the surfaces where the cover body 6 and the frame body 11 abut. For example, the third filling seal 44 can be made of foamed silicone. The foamed silicone is filled between the surfaces where the cover body 6 and the frame body 11 abut. The flange formed on the cover body 6 can reduce the overflow of the foamed silicone from the gap between the cover body 6 and the frame body 11.

[0114] In the above embodiment, since the cover body 6 is disposed on the second opening 14 of the frame 1, a battery box having a closed accommodation space 12 can be formed by enclosing the cover body 6, the frame 1 and the bottom plate assembly 2. A third filling seal 44 is disposed between the cover body 6 and the frame 1 to seal the gap between the cover body 6 and the frame 1, so that the accommodation space 12 in the battery box can be a sealed space, and further the battery monomers in the accommodated battery box can be isolated from the outside.

[0115] In some embodiments of the present application, a second connecting portion 71 is provided on the portion of the frame 11 corresponding to the cover 6, and a second fastener 72 adapted to the second connecting portion 71 passes through the cover 6 and is connected to the second connecting portion 71 to fix the cover 6 and the frame 11 together.

[0116] In the present application embodiment, Figure 6As shown, a second connecting portion 71 can be provided on the portion of the frame 11 that abuts against the cover body 6. At the same time, a through hole can be provided on the cover body 6 at a position corresponding to the second connecting portion 71. A second fastener 72 adapted to the second connecting portion 71 can be used, and the second fastener 72 can be passed through the through hole on the cover body 6 and connected to the second connecting portion 71. In this way, the cover body 6 and the frame 11 can be fixedly connected through the second connecting portion 71 and the second fastener 72.

[0117] For example, the second connection portion 71 may be a rivet nut provided on the frame 11, and the second fastener 72 may be a bolt adapted to the rivet nut. The second connection portion 71 may also be a riveted through hole provided on the frame 11, and the second fastener 72 may be a rivet adapted to the riveted through hole.

[0118] In the above embodiment, since the second connecting portion 71 is provided on the frame 11, the cover 6 and the frame 11 can be fixedly connected by a second fastener 72 adapted to the second connecting portion 71, so that the cover 6 and the frame 11 can be connected as a whole, which is beneficial to improving the reliability of the connection between the cover 6 and the frame 11.

[0119] In some embodiments of the present application, reference Figure 7 , Figure 7 This is a partial schematic diagram of the frame 1 in the battery box provided in the present application. The frame 11 is formed by bending and enclosing a plate 111, and the cross section of the frame 11 is a closed annular structure.

[0120] In the present application embodiment, Figure 3 and Figure 7 As shown, the frame 11 can be made of sheet metal. For example, a galvanized aluminum sheet is used, and the galvanized aluminum sheet is roll-formed and bent to form the galvanized aluminum sheet into a ring structure with a cross-sectional shape that is approximately rectangular. In the process of rolling the galvanized aluminum sheet, the abutting parts of the frame 11 can be welded by laser welding, so that the frame 11 is formed into a ring structure with a closed cross-section.

[0121] In the above embodiment, since the frame 11 is formed into a structure with a ring-shaped cross section by bending and enclosing the plate 111, compared with the aluminum profile box used in the related art, the frame 11 has higher strength, a smaller volume and a lower manufacturing cost; and compared with the stamped box in the related art, the frame 11 is not only stronger, but also can shorten the design time and reduce the design cost.

[0122] In some embodiments of the present application, a reinforcing portion 112 is provided in the frame 11 , and the reinforcing portion 112 is integrally formed with the frame 11 .

[0123] In the present application embodiment, Figure 3As shown, during the process of roller bending the frame 11 , a portion of the galvanized aluminum sheet can be placed inside the annular frame 11 , and the portion of the galvanized aluminum sheet located inside the annular frame 11 serves as a reinforcing portion 112 in the frame 11 .

[0124] Exemplarily, two reinforcing parts 112 may be provided inside the frame 11, both extending along the radial direction B of the frame 1 and abutting against the inner wall of the frame 11. Meanwhile, the edges of the two reinforcing parts 112 are respectively welded and fixed to the inner wall of the frame 11.

[0125] In the above embodiment, since the reinforcing portion 112 is provided in the frame 11 , the reinforcing portion 112 can improve the overall rigidity and torsional strength of the frame 11 , thereby improving the load-bearing capacity and strength of the battery box.

[0126] In addition, an embodiment of the present application further provides a battery, which includes: a battery cell and a battery box provided by any one of the above embodiments, and the battery cell is accommodated in the accommodating space 12.

[0127] In the embodiments of the present application, the battery cell may be a secondary battery, which refers to a battery cell that can be continuously used by activating the active material by charging after the battery cell is discharged. The battery cell may be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., and the embodiments of the present application are not limited thereto.

[0128] For example, when there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component. The battery cells can be installed in the receiving space 12 of the battery box to obtain a battery.

[0129] The battery provided in the embodiment of the present application includes the battery case provided in any one of the above embodiments, and therefore can reduce the risk of corrosion of the battery case, which is beneficial to increasing the service life of the battery case, and further increasing the service life of the battery.

[0130] At the same time, an embodiment of the present application also provides an electrical device, which includes the battery provided by the above embodiment for providing electrical energy.

[0131] In the embodiments of the present application, the battery can be used in, but is not limited to, energy storage power supply systems, vehicles, ships, aircraft and other electrical devices.

[0132] For example, when the electric device is a vehicle, the battery box can be used as part of the chassis structure of the vehicle. For example, part of the battery box can become at least a part of the floor of the vehicle, or part of the battery box can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0133] The electrical device provided in the embodiment of the present application includes the battery provided in the above embodiment, and therefore can reduce the risk of corrosion of the battery case, which is beneficial to increasing the service life of the battery, and further can increase the service life of the electrical device.

[0134] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the specification of the present application. 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.

Claims

1. A battery box, characterized in that: include: A frame, the frame comprising a receiving space formed by a plurality of frame bodies, and one end of the frame having a first opening; A bottom plate assembly, the bottom plate assembly covers the first opening; A first sealing member is disposed on the edge of the bottom plate assembly and the frame body, and is used for sealing the edge of the bottom plate assembly and between the bottom plate assembly and the frame body.

2. The battery box according to claim 1, characterized in that: In the axial direction along the frame, the orthographic projections of the side walls of the base plate assembly on the frame are all located on the frame body, and in the radial direction along the frame, the side walls of the base plate assembly are closer to the accommodating space than the outer side of the frame body; wherein the side walls of the base plate assembly are the wall surfaces on the base plate assembly along the radial direction, and the outer side of the frame body is the side of the frame body away from the accommodating space.

3. The battery box according to claim 2, characterized in that: The bottom plate assembly includes a bottom guard plate, and the bottom guard plate covers the first opening.

4. The battery box according to claim 3, characterized in that: The bottom plate assembly also includes a heat dissipation assembly, which is disposed between the first opening and the bottom guard plate; wherein, in a radial direction along the frame, a side wall of the bottom guard plate is closer to the accommodating space than a side wall of the heat dissipation assembly.

5. The battery box according to claim 4, characterized in that: The heat dissipation assembly includes a first heat dissipation element and a second heat dissipation element that are at least partially attached, a heat dissipation channel is provided between the first heat dissipation element and the second heat dissipation element, the first heat dissipation element abuts against the frame, and the bottom guard plate abuts against the second heat dissipation element; wherein, in the radial direction along the frame, the side wall of the second heat dissipation element is closer to the accommodating space than the side wall of the first heat dissipation element, and the side wall of the bottom guard plate is closer to the accommodating space than the side wall of the second heat dissipation element.

6. The battery box according to claim 5, characterized in that: In the radial direction of the frame, the width of the portion where the first sealing member is connected to the frame body is greater than or equal to two fifths of the width of the first sealing member; And / or, a width of at least one part of two parts of the first seal that are respectively connected to the first heat sink and the second heat sink is greater than or equal to one fifth of a width of the first seal.

7. The battery box according to claim 5, characterized in that: In the radial direction of the frame, the width of the portion where the first sealing member is connected to the frame body is greater than or equal to 5 mm; And / or, widths of portions where the first seal is connected to the first heat sink and the second heat sink, respectively, are both greater than or equal to 2 mm.

8. The battery box according to claim 5, characterized in that: An adhesive seal is provided between the first heat sink and the frame, and the adhesive seal is used to adhesively connect the first heat sink and the frame.

9. The battery case according to claim 5, characterized in that: A first filling sealant is further provided between the frame and the first heat sink, and the first filling sealant is used to fill and seal a gap between the frame and the first heat sink near the accommodating space.

10. The battery case according to claim 5, characterized in that: A second filling seal is provided between the second heat dissipation member and the bottom guard plate, and the second filling seal is used to fill and seal the gap between the second heat dissipation member and the bottom guard plate.

11. The battery case according to any one of claims 3 to 10, characterized in that: The bottom plate assembly also includes a protective layer, which covers the surface of the bottom guard plate away from the frame, and is used to isolate the bottom guard plate from the air.

12. The battery case according to any one of claims 1 to 10, characterized in that: A first connecting portion is provided on the frame at a portion corresponding to the base plate assembly, and a first fastener adapted to the first connecting portion passes through the base plate assembly and is connected to the first connecting portion to fix the base plate assembly to the frame.

13. The battery case according to any one of claims 1 to 10, characterized in that: It also includes a cover body, and the end of the frame away from the first opening has a second opening, and the cover body covers the second opening; a third filling seal is arranged between the cover body and the frame body, and the third filling seal is used to fill and seal the gap between the cover body and the frame body.

14. The battery case according to claim 13, characterized in that: A second connecting portion is provided on the frame body at a portion corresponding to the cover body, and a second fastener adapted to the second connecting portion passes through the cover body and is connected to the second connecting portion to fix the cover body and the frame body.

15. The battery case according to any one of claims 1 to 10, characterized in that: The frame is formed by bending and enclosing plates, and the cross section of the frame is a closed annular structure.

16. The battery case according to claim 15, characterized in that: A reinforcement portion is provided in the frame, and the reinforcement portion is integrally formed with the frame.

17. A battery, characterized in that: include: Battery cells; The battery case according to any one of claims 1 to 16, wherein the battery cell is accommodated in the accommodating space.

18. An electrical device, characterized in that: The electrical device comprises the battery according to claim 17 for providing electrical energy.

Images