Sheet metal battery box and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a sheet metal battery box and a battery, the sheet metal battery box comprises an outer box body; the built-in box body is used for accommodating the battery pack, the built-in box body is arranged in the outer box body, a deformation space is formed between the built-in box body and the outer box body, the built-in box body comprises a plurality of mutually spliced side plates, and side edges are arranged at the splicing positions of the side plates; the top cover is arranged in the outer box body, a sealing structure is arranged between the top cover and the built-in box body, and the battery pack is sealed in the built-in box body through the top cover and the sealing structure; the battery comprises a metal plate battery box, a battery pack is arranged in a built-in box body, and a charging socket and a discharging socket are arranged on a top cover. The metal plate battery box has the technical effect of improving the use safety of the metal plate battery box.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a sheet metal battery box and a battery. Background Technology

[0002] Lithium-ion batteries, with their advantages of high energy density, long lifespan, no memory effect, and low self-discharge rate, can be used as energy storage devices in various electronic devices or electric vehicles, such as electric bicycles. Lithium-ion batteries typically use a battery case to protect the battery pack, which is assembled inside the case and serves to support and seal the battery pack.

[0003] In related technologies, the battery box includes a sheet metal box body and a top cover. The sheet metal box body is formed by bending sheet metal, and the battery pack is placed inside the sheet metal box body. The top cover is sealed to the sheet metal box body. The battery box can reduce mechanical damage to the battery pack to a certain extent.

[0004] However, because the sheet metal casing is made of metal, when the lithium battery is subjected to severe external impact, the sheet metal casing is prone to inward deformation and compression of the internal battery pack, which can lead to safety accidents such as short circuits in the battery pack. Utility Model Content

[0005] To address the shortcomings of the prior art, this utility model provides a sheet metal battery box and battery. The outer casing deforms inward into the deformation space, which can reduce the impact on the inner casing. The inner casing is reinforced with side edges to enhance structural strength, which helps protect the internal battery pack, reduces the possibility of safety accidents caused by external impacts to the sheet metal battery box, and improves the safety of use.

[0006] The technical effects to be achieved by this utility model are realized through the following technical aspects:

[0007] In a first aspect, this utility model provides a sheet metal battery box, including an outer casing; an inner casing for accommodating a battery pack, the inner casing being disposed inside the outer casing and forming a deformable space between them; the inner casing including a plurality of interlocking side panels, the side panels having side edges at the joints; and a top cover disposed inside the outer casing, a sealing structure being provided between the top cover and the inner casing, the battery pack being sealed inside the inner casing via the top cover and the sealing structure.

[0008] In some implementations, the side edge is formed by bending the side plate into the deformation space.

[0009] In some implementations, a reinforcing rib is provided on the side of the side plate near the deformation space, and the outer wall of the reinforcing rib is attached to the inner wall of the outer casing.

[0010] In some implementations, the edge of the top cover is bent toward the inner box to form a recessed portion, the side panel includes a folded portion, and the folded portion and the recessed portion seal the inner box through the sealing structure.

[0011] In some implementations, the sealing structure includes a connector that passes sequentially through the sunken portion and the folded portion; and a structural adhesive layer disposed between the sunken portion and the folded portion.

[0012] In some implementations, the connector includes a rivet that passes sequentially through the recessed portion, the structural adhesive layer, and the folded portion, and the recessed portion is provided with an outer sealing adhesive layer.

[0013] In some implementations, a through hole is provided on the recessed portion, and the outer sealing layer fills the through hole.

[0014] In some implementations, the thickness of the outer sealing layer is 1 to 6 mm.

[0015] In some implementations, a corner is formed between the side edge and the folded portion, and the side plate is provided with a corner brace at the corner for supporting and reinforcing the side edge and the folded portion.

[0016] Secondly, this utility model provides a battery, including the sheet metal battery box described above, wherein a battery pack is disposed inside the inner box, and a charging socket and a discharging socket are disposed on the top cover.

[0017] In summary, this utility model has at least the following advantages:

[0018] The sheet metal battery box and battery provided by this utility model have the battery pack sealed within the inner casing by a top cover and a sealing structure. The sealing structure ensures the airtightness of the inner casing, reducing the amount of moisture entering the inner casing. When the sheet metal battery box is impacted, the outer casing is dented due to the impact force, and the deformation space provides a buffer for the inward deformation of the outer casing, thus providing safety protection for the inner casing and battery pack. Simultaneously, the side edges are located at the joints of adjacent side panels, enhancing the structural strength of the inner casing at these joints, reducing the impact of external forces on the inner casing when the outer casing is impacted, and improving the sheet metal battery box's resistance to mechanical impact. Attached Figure Description

[0019] Figure 1 This is an exploded view of a sheet metal battery box according to a specific embodiment of the present utility model.

[0020] Figure 2 This is a partial cross-sectional view of a sheet metal battery box according to a specific embodiment of the present utility model.

[0021] Figure 3 This is a schematic diagram of the internal housing and top cover of a specific embodiment of the present utility model.

[0022] Figure 4 This is a schematic diagram of the structure of a sheet metal battery box when sealed by a sealing structure, according to a specific embodiment of the present utility model.

[0023] Figure 5 for Figure 3 A structural diagram from another angle.

[0024] Figure 6 This is a schematic diagram of the top cover of a specific embodiment of the present utility model.

[0025] Marked in the image:

[0026] 1. Outer casing; 11. Side handle;

[0027] 2. Internal enclosure; 21. Deformation space; 22. Side panel; 221. Side edge; 222. Reinforcing rib; 223. Folding section; 23. Corner; 24. Base plate;

[0028] 3. Top cover; 31. Sealing structure; 311. Connector; 312. Structural adhesive layer; 313. Outer sealing adhesive layer; 32. Recessed part; 321. Through hole; 33. Charging socket; 34. Discharging socket; 35. Terminal block. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] Example 1:

[0032] Please see the appendix Figure 1 and Figure 2 The sheet metal battery box of this utility model can be used as a housing and protection structure in lithium batteries, providing good resistance to mechanical impact and thus improving the safety of lithium battery use.

[0033] This utility model discloses a sheet metal battery box, including an outer casing 1. Specifically, the outer casing 1 can be formed by bending and welding sheet metal. The outer casing 1 has a simple structure and low manufacturing cost. An inner casing 2 for accommodating the battery pack is provided inside the outer casing 1. A deformation space 21 is formed between the inner casing 2 and the outer casing 1. When the outer casing 1 is deformed by an external impact, the deformation space 21 provides a buffer space for the indentation of the outer casing 1, thereby cushioning the inner casing 2. The outer casing 1 and the inner casing 2 form a double layer of protection on the outside of the battery pack.

[0034] The internal housing 2 includes multiple interlocking side panels 22. Specifically, the internal housing 2 can be a rectangular housing formed by the side panels 22. It should be understood that this is not a specific limitation on the shape of the internal housing 2, and the splicing method of the side panels 22 can be adjusted according to the specifications of the battery pack. Among them, the side panels 22 are provided with side edges 221 at the splicing points. The side edges 221 can reinforce the splicing points of adjacent side panels 22, thereby strengthening the structural strength of the side panels 22 at the splicing points and enhancing the overall resistance of the internal housing 2 to external impacts.

[0035] A top cover 3 is provided on one side of the inner casing 2. Specifically, the top cover 3 can be embedded inside the outer casing 1, which helps to ensure the airtightness of the outer casing 1. A sealing structure 31 is provided between the top cover 3 and the inner casing 2, and the battery pack is sealed inside the inner casing 2 through the top cover 3 and the sealing structure 31. During battery assembly, the battery pack is first placed into the inner casing 2, and then the inner casing 2 and the battery pack are placed into the outer casing 1. The top cover 3 is sealed to the inner casing 2 through the sealing structure 31, which can provide good waterproof performance in rainy or humid environments and ensure the safety of the battery pack.

[0036] When the sheet metal battery box is impacted, the outer casing 1 and the deformation space 21 work together to buffer the impact of the external force on the inner casing 2 and the battery pack. At the same time, the inner casing 2 has high structural strength, providing safe protection for the battery pack. Compared with traditional single-layer sheet metal battery boxes, this design improves the safety and reliability of sheet metal battery boxes, which are prone to short circuits and other safety accidents after impact.

[0037] Example 2:

[0038] The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the built-in housing 2 of this utility model. Please refer to [link / reference]. Figures 3-5 .

[0039] Please see Figure 3In this embodiment, the side plate 22 is provided with a reinforcing rib 222. The reinforcing rib 222 is located on the side of the side plate 22 near the deformation space 21. Specifically, the reinforcing rib 222 can be formed by bending sheet metal. When the inner box 2 is assembled in the outer box 1, the outer wall of the reinforcing rib 222 fits against the inner wall of the outer box 1. The reinforcing rib 222 can be supported between the outer box 1 and the inner box 2 to enhance the structural strength.

[0040] In a preferred embodiment, the side edge 221 is formed by bending the side plate 22 toward the deformation space 21. Specifically, two adjacent side plates 22 are the first side plate and the second side plate, respectively. The side edges of the first side plate and the second side plate are both bent toward the deformation space 21, and the bending angle can be 90°, so that the side edge of the second side plate is attached to the first side plate and spliced ​​together. The side edge of the first side plate is attached to the inner wall of the outer box 1. The setting of the side edge 221 is conducive to improving the structural strength of the inner box 2 at the splice of the side plate 22, ensuring the firmness of the splice, and thus improving the ability to resist mechanical impact.

[0041] In a preferred embodiment, the edge of the top cover 3 is bent toward the inner box 2 to form a recessed portion 32, and the side panel 22 includes a folded portion 223. The folded portion 223 and the recessed portion 32 are sealed to the inner box 2 by the sealing structure 31. Specifically, the folded portion 223 is bent toward the deformation space 21, and the folded portion 223 and the recessed portion 32 are arranged parallel to each other so that the folded portion 223 and the recessed portion 32 fit together.

[0042] In some specific embodiments, the sealing structure 31 includes a connector 311 that passes through the recessed portion 32 and the folded portion 223 in sequence. Specifically, the connector 311 includes rivets that pass through the recessed portion 32 and the folded portion 223 respectively. Multiple rivets may be provided, and multiple rivets are arranged around the top cover 3. A structural adhesive layer 312 is provided between the recessed portion 32 and the folded portion 223. During assembly, structural adhesive is first applied to the folded portion 223, and the recessed portion 32 is covered on the structural adhesive. The structural adhesive solidifies between the folded portion 223 and the recessed portion 32 to form the structural adhesive layer 312. By having the rivets pass through the recessed portion 32, the structural adhesive layer 312, and the folded portion 223 in sequence, the top cover 3 and the inner box 2 are sealed together. The rivets can compress the structural adhesive layer 312 to ensure sealing. The structural adhesive layer 312 provides waterproofing, corrosion resistance, and shock absorption.

[0043] Please see Figure 4Furthermore, after the top cover 3 and the inner casing 2 are placed inside the outer casing 1, an outer sealing layer 313 is provided on the top surface of the recessed portion 32. Specifically, the outer sealing layer 313 preferably uses a waterproof adhesive layer, such as a single-component or two-component organic outer sealing layer 313. The outer sealing layer 313 covers the recessed portion 32 and fills the gap between the recessed portion 32 and the inner wall of the outer casing 1, achieving a double waterproofing effect. At the same time, the setting of rivets and structural adhesive layer 312 provides strong adhesion between the recessed portion 32 and the folded portion 223, making it difficult for consumers to remove the top cover 3 and the inner casing 2 themselves, and preventing accidental removal of the top cover 3. The structural adhesive layer 312 and the waterproof adhesive layer seal the inner casing 2. Compared with the traditional waterproof structure of the inner casing of a battery box, the sheet metal battery box of this utility model can achieve the weight reduction of lithium batteries, facilitate timely heat dissipation of the battery pack, and reduce the possibility of safety accidents caused by overheating inside the battery pack.

[0044] Please see Figure 3 In a preferred embodiment, the recessed portion 32 is provided with through holes 321. Specifically, multiple through holes 321 can be provided, spaced apart on the recessed portion 32, and the shape of the through holes 321 can be circular, rectangular, or polygonal. When the outer sealing layer 313 is applied, it fills the through holes 321, which can enhance the adhesion and firmness between the outer sealing layer 313 and the recessed portion 32, and improve the waterproof performance. Specifically, the thickness of the structural adhesive layer 312 can be 1-6 mm, in which case the structural adhesive layer 312 can solidify quickly and meet the appropriate bonding strength.

[0045] In some specific embodiments, a corner 23 is formed between the side edge 221 and the folded portion 223. The side plate 22 is provided with a corner brace at the corner 23 to support and reinforce the side edge 221 and the folded portion 223. Specifically, the corner brace can be a triangular block supported at the corner 23, or a sheet metal piece inclined between the side edge 221 and the folded portion 223. The corner brace enhances the structural strength of the side plate 22 at the corners, protecting the safety of the internal battery pack.

[0046] Please see Figure 5 As shown in some specific embodiments, the built-in box 2 includes a bottom plate 24, which is disposed at the bottom of a plurality of side plates 22 and spliced ​​with the side plates 22. A reinforcing grid is provided on the side of the bottom plate 24 near the outer box 1. The reinforcing grid includes longitudinal ribs and transverse ribs, which are staggered to enhance the load-bearing capacity of the bottom of the built-in box 2.

[0047] Example 3:

[0048] This embodiment provides a battery based on the above embodiments. Please refer to [link / reference]. Figure 6 .

[0049] A battery includes the aforementioned sheet metal battery box, wherein a battery pack is disposed within an inner casing 2, and a first mounting hole and a second mounting hole are respectively provided on a top cover 3. A charging socket 33 is provided at the first mounting hole on the top cover 3, and a discharging socket 34 is provided at the second mounting hole. The electrical connection methods between the charging socket 33 and the discharging socket 34 and the battery pack are known to those skilled in the art and are feasible, and will not be described in detail in this embodiment. A terminal 35 is provided on the top cover 3, and a handle is provided on the terminal 35 to facilitate the electrical connection between the battery pack and external components.

[0050] In a preferred embodiment, the outer casing 1 is provided with a side handle 11 to facilitate the transportation of the battery.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0054] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A sheet metal battery box, characterized by, The utility model relates to a battery box made of sheet metal, comprising An outer box (1); An inner box (2) for accommodating a battery pack, the inner box (2) being arranged inside the outer box (1) and forming a deformation space (21) with the outer box (1), the inner box (2) comprising a plurality of side plates (22) that are spliced with each other, the side plates (22) being provided with side edges (221) at the spliced positions; and A top cover (3) arranged in the outer box (1), the top cover (3) and the inner box (2) being provided with a sealing structure (31) therebetween, the battery pack being sealed in the inner box (2) through the top cover (3) and the sealing structure (31).

2. The sheet metal battery box of claim 1, wherein, The side edges (221) are bent from the side plates (22) towards the deformation space (21).

3. The sheet metal battery box of claim 2, wherein, The side plates (22) are provided with reinforcing ribs (222) on the sides close to the deformation space (21), the outer walls of the reinforcing ribs (222) being in close contact with the inner walls of the outer box (1).

4. The sheet metal battery box of claim 2, wherein, The edges of the top cover (3) are bent to form sunken portions (32) at the inner box (2), the side plates (22) comprising folded portions (223), the folded portions (223) and the sunken portions (32) sealing the inner box (2) through the sealing structure (31).

5. The sheet metal battery box of claim 4, wherein, The sealing structure (31) comprises a connecting piece (311) that penetrates the sunken portions (32) and the folded portions (223) in sequence; and A structural adhesive layer (312) arranged between the sunken portions (32) and the folded portions (223).

6. The sheet metal battery box of claim 5, wherein, The connecting piece (311) comprises a rivet that penetrates the sunken portions (32), the structural adhesive layer (312) and the folded portions (223) in sequence, the sunken portions (32) being provided with an outer sealing adhesive layer (313).

7. The sheet metal battery box of claim 6, wherein, The sunken portions (32) are provided with through holes (321), and the outer sealing adhesive layer (313) fills the through holes (321).

8. The sheet metal battery box of claim 7, wherein, The thickness of the outer sealing adhesive layer (313) is 1-6 mm.

9. The sheet metal battery box of claim 4, wherein, An angle (23) is formed between the side edges (221) and the folded portions (223), and the side plates (22) are provided with angle braces at the angle (23) for supporting and reinforcing the side edges (221) and the folded portions (223).

10. A battery, characterized by The utility model relates to a battery box made of sheet metal, comprising An inner box (2) for accommodating a battery pack, the inner box (2) being arranged inside the outer box (1) and forming a deformation space (21) with the outer box (1), the inner box (2) comprising a plurality of side plates (22) that are spliced with each other, the side plates (22) being provided with side edges (221) at the spliced positions; and A top cover (3) arranged in the outer box (1), the top cover (3) and the inner box (2) being provided with a sealing structure (31) therebetween, the battery pack being sealed in the inner box (2) through the top cover (3) and the sealing structure (31). The side edges (221) are bent from the side plates (22) towards the deformation space (21). The side plates (22) are provided with reinforcing ribs (222) on the sides close to the deformation space (21), the outer walls of the reinforcing ribs (222) being in close contact with the inner walls of the outer box (1). The edges of the top cover (3) are bent to form sunken portions (32) at the inner box (2), the side plates (22) comprising folded portions (223), the folded portions (223) and the sunken portions (32) sealing the inner box (2) through the sealing structure (31). The sealing structure (31) comprises a connecting piece (311) that penetrates the sunken portions (32) and the folded portions (223) in sequence; and A structural adhesive layer (312) arranged between the sunken portions (32) and the folded portions (223). The connecting piece (311) comprises a rivet that penetrates the sunken portions (32), the structural adhesive layer (312) and the folded portions (223) in sequence, the sunken portions (32) being provided with an outer sealing adhesive layer (313). The sunken portions (32) are provided with through holes (321), and the outer sealing adhesive layer (313) fills the through holes (321). The thickness of the outer sealing adhesive layer (313) is 1-6 mm. An angle (23) is formed between the side edges (221) and the folded portions (223), and the side plates (22) are provided with angle braces at the angle (23) for supporting and reinforcing the side edges (221) and the folded portions (223). The utility model relates to a battery box made of sheet metal, comprising An inner box (2) for accommodating a battery pack, the inner box (2) being arranged inside the outer box (1) and forming a deformation space (21) with the outer box (1), the inner box (2) comprising a plurality of side plates (22) that are spliced with each other, the side plates (22) being provided with side edges (221) at the spliced positions; and A top cover (3) arranged in the outer box (1), the top cover (3) and the inner box (2) being provided with a sealing structure (31) therebetween, the battery pack being sealed in the inner box (2) through the top cover (3) and the sealing structure (31). The side edges (221) are bent from the side plates (22) towards the deformation space (21). The side plates (22) are provided with reinforcing ribs (222) on the sides close to the deformation space (21), the outer walls of the reinforcing ribs (222) being in close contact with the inner walls of the outer box (1). The edges of the top cover (3) are bent to form sunken portions (32) at the inner box (2), the side plates (22) comprising folded portions (223), the folded portions (223) and the sunken portions (32) sealing the inner box (2) through the sealing structure (31). The sealing structure (31) comprises a connecting piece (311) that penetrates the sunken portions (32) and the folded portions (223) in sequence; and A structural adhesive layer (312) arranged between the sunken portions (32) and the folded portions (223). The connecting piece (311) comprises a rivet that penetrates the sunken portions (32), the structural adhesive layer (312) and the folded portions (223) in sequence, the sunken portions (32) being provided with an outer sealing adhesive layer (313). The sunken portions (32) are provided with through holes (321), and the outer sealing adhesive layer (313) fills the through holes (321). The thickness of the outer sealing adhesive layer (313) is 1-6 mm. An angle (23) is formed between the side edges (221) and the folded portions (223), and the side plates (22) are provided with angle braces at the angle (23) for supporting and reinforcing the side edges (221) and the folded portions (223). The utility model relates to a battery box made of sheet metal, comprising An inner box (2) for accommodating a battery pack, the inner box (2) being arranged inside the outer box (1) and forming a deformation space (21) with the outer box (1), the inner box (2) comprising a plurality of side plates (22) that are spliced with each other, the side plates (22) being provided with side edges (221) at the spliced positions; and A top cover (3) arranged in the outer box (1), the top cover (3) and the inner box (2) being provided with a sealing structure (31) therebetween, the battery pack being sealed in the inner box (2) through the top cover (3) and the sealing structure (31). The side edges (221) are bent from the side plates (22) towards the deformation space (21). The side plates (22) are provided with reinforcing ribs (222) on the sides close to the deformation space (21), the outer walls of the reinforcing ribs (222) being in close contact with the inner walls of the outer box (1). The edges of the top cover (3) are bent to form sunken portions (32) at the inner box (2), the side plates (22) comprising folded portions (223), the folded portions (223) and the sunken portions (32) sealing the inner box (2) through the sealing structure (31). The sealing structure (31) comprises a connecting piece (311) that penetrates the sunken portions (32) and the folded portions (223) in sequence; and A structural adhesive layer (312) arranged between the sunken portions (32) and the folded portions (223). The connecting piece (311) comprises a rivet that penetrates the sunken portions (32), the structural adhesive layer (312) and the folded portions (223) in sequence, the sunken portions (32) being provided with an outer sealing adhesive layer (313). The sunken portions (32) are provided with through holes (321), and the outer sealing adhesive layer (313) fills the through holes (321). The thickness of the outer sealing adhesive layer (313) is 1-6 mm. An angle (23) is

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