Box structure, battery and electric device

Abstract

The utility model relates to a box structure, a battery and an electric device. The box structure comprises a box body, the box body comprises a side wall part and a flanging part, the flanging part is arranged at the top end of the side wall part and folded outwards or inwards relative to the side wall part, and the flanging part is arranged in the circumferential direction of the side wall part; the box cover is located on the top side of the box body and comprises a main body part and an edge part arranged in the circumferential direction of the main body part, the edge part is arranged on the flanging part in a stacked mode, and any one of the main body part and the flanging part is sunken in the direction opposite to the other one to form a groove; at least part of the sealing piece is contained in the groove, and the sealing piece is connected between the main body part and the flanging part in a sealing mode; and the multiple fasteners are arranged in the circumferential direction of the edge part and used for connecting and fixing the edge part and the flanging part. According to the box structure, the battery and the power utilization device, the size in the height direction can be reduced.

Description

Technical Field

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

[0002] As the core component of energy storage and conversion, batteries have been widely used in new energy vehicles, energy storage power stations and other fields.

[0003] The battery generally includes a box structure, which is used to form a storage space for accommodating battery cells to isolate the battery cells from the external environment. The traditional box structure has a large size in its height direction, resulting in reduced space utilization and volume energy density of the battery. Utility Model Content

[0004] Based on this, it is necessary to provide a box structure, a battery and an electrical device that can reduce the size in the height direction in order to address the above problems.

[0005] A box structure, comprising:

[0006] The box body comprises a side wall portion and a flange portion, wherein the flange portion is arranged at the top end of the side wall portion and is folded outward or inward relative to the side wall portion, and the flange portion is arranged around the circumference of the side wall portion;

[0007] A box cover is located on the top side of the box body and includes a main body and an edge portion arranged circumferentially around the main body, wherein the edge portion is stacked on the flange portion, and either the main body or the flange portion is recessed in a direction away from the other to form a groove;

[0008] A sealing member, at least partially received in the groove, and the sealing member is sealingly connected between the main body and the flange portion;

[0009] A plurality of fasteners are arranged along the circumference of the edge portion, and the fasteners are used to connect and fix the edge portion and the flange portion.

[0010] In some embodiments, the main body portion is recessed in a direction away from the flange portion to form the groove.

[0011] In some embodiments, the seal is completely received in the groove.

[0012] In some embodiments, a folding angle between the side wall portion and the flange portion is 90°.

[0013] In some embodiments, the box structure also includes a reinforcing strip, which is arranged on the top side of the box cover facing away from the box body, and includes a connected mounting portion and a reinforcing portion, the mounting portion is pressed between the edge portion and each of the fasteners, the reinforcing portion extends to the main body portion, and the orthographic projection of the reinforcing portion on the flange portion covers at least part of the orthographic projection of the seal on the flange portion.

[0014] In some embodiments, the orthographic projection of the reinforcing portion on the flange portion covers the entire orthographic projection of the sealing member on the flange portion.

[0015] In some embodiments, the fastener is a threaded component and includes a screw and a screw sleeve, the screw is sequentially inserted into the edge portion and the flange portion, the screw sleeve is located on the bottom side of the flange portion facing away from the edge portion, and is threadedly engaged with the screw.

[0016] In some embodiments, the sealing member extends along the circumference of the main body and forms a closed loop structure.

[0017] A battery, comprising:

[0018] Battery cells, and;

[0019] The box structure as described in any one of the above embodiments is used to accommodate the battery cells.

[0020] An electrical device comprises the battery as described in the above embodiment.

[0021] In the above-mentioned box structure, battery and electrical device, the seal is at least partially accommodated in the groove. Therefore, the seal and the box cover can share the space in the height direction of the box structure, which is beneficial to reduce the size of the box structure in its height direction, thereby reducing the volume of the box structure, and further beneficial to improving the space utilization and volume energy density of the box structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 An exploded view of the box structure when the flange portion of the box structure is folded outward in one embodiment of the present application;

[0023] Figure 2 for Figure 1 A partial cross-sectional view of the box structure after assembly shown;

[0024] Figure 3 for Figure 2 An enlarged schematic diagram of a local structure A of the box structure shown;

[0025] Figure 4 An exploded view of the box structure when the flange portion of the box structure is folded inwards in another embodiment of the present application;

[0026] Figure 5 for Figure 4 A partial cross-sectional view of the box structure after assembly shown;

[0027] Figure 6 for Figure 5 An enlarged schematic diagram of a local structure B of the box structure shown;

[0028] Figure 7 This is a partial cross-sectional view of a box structure when the box structure has a reinforcing layer in another embodiment of the present application;

[0029] Figure 8 for Figure 7 An enlarged schematic diagram of a local structure C of the box structure is shown.

[0030] Figure Number:

[0031] 1. Box structure;

[0032] 10. Box body; 20. Box cover; 30. Sealing member; 40. Fastener; 50. Reinforcement strip;

[0033] 11. side wall; 12. flange portion; 13. bottom; 14. accommodation space;

[0034] 21. main body; 211. groove; 22. edge;

[0035] 41. Screw; 42. Screw sleeve;

[0036] 51. mounting portion; 52. reinforcement portion;

[0037] Z, height direction. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In this application, unless otherwise clearly specified and limited, the terms "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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0044] As a power source, the battery can provide electrical energy to electrical devices. The electrical devices may be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. The electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. The spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0045] See also Figure 1 The battery includes a battery cell and a box structure 1, and the box structure 1 is used to store the battery cell.

[0046] In the battery, there can be multiple battery cells, and the multiple battery cells can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells are both connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells is accommodated in the box structure 1; of course, the battery can also be a battery module formed by connecting multiple battery cells in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box structure 1. Among them, each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but it is not limited thereto. The battery cell can be cylindrical, flat, rectangular, or in other shapes.

[0047] The box structure 1 can be in various shapes, such as a cylinder, a cuboid, etc., and the specific structure of the box structure 1 can adopt various structural modes.

[0048] Please refer again Figure 1 , and also see Figures 2 to 8 The box structure 1 includes a box body 10, a box cover 20, a seal 30, a plurality of fasteners 40 and a reinforcing strip 50. The box body 10 and the box cover 20 together enclose a storage space 14 for accommodating battery cells. The seal 30 is used to seal the gap between the box body 10 and the box cover 20. The fastener 40 is used to connect and fix the box body 10 and the box cover 20. The reinforcing strip 50 is arranged on the box cover 20 and is used to enhance the ability of the box cover 20 to resist deformation.

[0049] Combination Figures 1 to 6Specifically, the box body 10 includes a bottom 13, a side wall portion 11 and a flange portion 12. The flange portion 12 is arranged at the top end of the side wall portion 11 and is folded outward or inward relative to the side wall portion 11, and the flange portion 12 is arranged around the circumference of the side wall portion 11, and the bottom 13 is arranged at the bottom end of the side wall portion 11.

[0050] The side wall portion 11 is a hollow structure with openings at both ends, the bottom portion 13 is arranged at the bottom end of the side wall portion 11 and is used to close the bottom end opening of the side wall portion 11, and the flange portion 12 is arranged at the top end of the side wall portion 11 and is used to assemble the box cover 20. The bottom portion 13, the side wall portion 11 and the flange portion 12 can be integrally formed, or the bottom portion 13, the side wall portion 11 and the flange portion 12 can also be assembled to form the box body 10.

[0051] When the flange portion 12 is folded outward relative to the side wall portion 11, the flange portion 12 and the box cover 20 can be conveniently connected by the fastener 40. When the flange portion 12 is folded inward, the dimensions of the box body 10 along its length and width directions can be reduced, so that the volume of the box structure 1 is smaller, which is conducive to achieving the purpose of improving the space utilization and volume energy density of the box structure 1.

[0052] The folding angle between the side wall portion 11 and the flange portion 12 (eg Figure 3 The middle angle D) can be 30°, 60°, 90°, 120°, etc., taking the folding angle between the side wall portion 11 and the flange portion 12 as 90° as an example. At this time, the side wall portion 11 extends along the height direction Z of the box structure 1, and the flange portion 12 extends horizontally. In this way, the box body 10 has a smaller size in the height direction Z of the box structure 1, which can reduce the volume of the box structure 1, thereby facilitating improving the space utilization and volume energy density of the battery.

[0053] Combination Figure 1 , Figure 3 , Figure 4 and Figure 6 The box cover 20 is located on the top side of the box body 10 and covers the opening at the top end of the side wall portion 11 to form an accommodating space 14 for accommodating the battery cells in conjunction with the box body 10 .

[0054] The box cover 20 includes a main body 21 and an edge 22 circumferentially arranged around the main body 21 . The edge 22 is stacked on the flange 12 , and either the main body 21 or the flange 12 is recessed in a direction away from the other to form a groove 211 .

[0055] The main body 21 and the edge 22 may be formed in one piece, or the main body 21 and the edge 22 may be assembled to form the box cover 20 .

[0056] As an example, the surfaces of the main body 21 and the edge 22 on the same side are arranged flush to form a flat box cover 20, in which case the flange 12 is recessed in a direction away from the main body 21 to form a groove 211. Alternatively, as an example, a step may be defined between the main body 21 and the edge 22 to form a non-flat box cover 20, in which case the main body 21 is recessed in a direction away from the flange 12 to form a groove 211. It is understandable that the surface area of ​​the main body 21 is much larger than the surface area of ​​the flange 12, and the method of recessing the main body 21 to form the groove 211 is simpler and easier to operate.

[0057] Combination Figure 3 and Figure 6 The sealing member 30 may be a sealing pad, a sealing ring or other sealing structures. The sealing member 30 may be made of rubber, silicone or other materials with good sealing performance.

[0058] The sealing member 30 is sealingly connected between the main body 21 and the flange 12 . The sealing member 30 can reduce the amount of external water vapor that enters the battery through the gap between the main body 21 and the flange 12 , thereby achieving a sealing effect.

[0059] For example, the seal 30 includes a plurality of intermittently arranged sealing portions, all of which are arranged at intervals along the circumference of the main body 21, or the seal 30 can also extend along the circumference of the main body 21 and form a closed loop structure. In this way, the seal 30 can seal the gap between the main body 21 and the flange portion 12 along the circumference of the main body 21, and the sealing effect is good.

[0060] Furthermore, the seal 30 is at least partially contained in the groove 211, such as the seal 30 is completely contained in the groove 211. In the related art, the seal 30 is usually disposed between the flange portion 12 and the edge portion 22, resulting in a larger size of the box structure 1 in the height direction Z, resulting in a reduction in the space utilization rate and volume energy density of the battery. In the present application, the seal 30 is designed to be at least partially contained in the groove 211, so that the seal 30 and the box cover 20 can share the space in the height direction Z of the box structure 1, which is conducive to reducing the size of the box structure 1 in the height direction Z, so that the volume of the box structure 1 is reduced, which is conducive to improving the space utilization rate and volume energy density of the box structure 1.

[0061] Combination Figure 3 and Figure 6, a plurality of fasteners 4 are arranged along the circumference of the edge portion 22, and the fastener 40 is used to connect and fix the edge portion 22 and the flange portion 12 to realize the assembly of the box cover 20 and the box body 10. For example, the fastener 40 is a screw-connected member and includes a screw rod 41 and a screw sleeve 42, the screw rod 41 is sequentially penetrated through the edge portion 22 and the flange portion 12, the screw sleeve 42 is located at the bottom side of the flange portion 12 facing away from the edge portion 22, and is screwed with the screw rod 41. By setting the fastener 40 as a screw-connected member, a detachable connection between the box body 10 and the box cover 20 can be realized, so as to facilitate the assembly or disassembly of the box cover 20 and the box body 10. Of course, the specific form of the fastener 40 is not limited to the above one, and in some other embodiments, the fastener 40 can also be a pin, a clip or other fixing components.

[0062] Combination Figure 7 and Figure 8 The reinforcing strip 50 is arranged on the top side of the box cover 20 facing away from the box body 10, and includes a connected mounting portion 51 and a reinforcing portion 52, the mounting portion 51 is pressed between the edge portion 22 and each fastener 40, the reinforcing portion 52 extends to the main body portion 21, and the orthographic projection of the reinforcing portion 52 on the flange portion 12 covers at least part of the orthographic projection of the sealing member 30 on the flange portion 12, such as, the orthographic projection of the reinforcing portion 52 on the flange portion 12 covers the entire orthographic projection of the sealing member 30 on the flange portion 12.

[0063] Specifically, the mounting portion 51 and the reinforcing portion 52 may be formed in one piece, or the mounting portion 51 and the reinforcing portion 52 may be assembled to form the reinforcing strip 50 .

[0064] As an example, the reinforcing strip 50 can be a closed-loop structure that extends continuously along the circumference of the box cover 20, or the reinforcing strip 50 can also include a plurality of sub-strips, which are arranged at intervals along the circumference of the box cover 20, and each sub-strip includes a mounting portion 51 and a reinforcing portion 52. For example, the number of sub-strips is the same as the number of fasteners 40 and corresponds one-to-one, and the mounting portion 51 of each sub-strip is pressed between the fastener 40 corresponding to the sub-strip and the edge portion 22, or the number of sub-strips can also be the same as the number of side edges of the box cover 20 and correspond one-to-one. Taking the box cover 20 as a rectangular structure as an example, the box cover 20 has four side edges, and then there are four sub-strips, and each sub-strip extends along the length direction of the side edge corresponding to it.

[0065] The mounting portion 51 is pressed between the edge portion 22 and each fastener 40 to achieve the installation of the reinforcing strip 50, and the reinforcing portion 52 extends to the main body portion 21, and the orthographic projection of the reinforcing portion 52 on the flange portion 12 covers at least part of the orthographic projection of the seal 30 on the flange portion 12, thereby strengthening the strength of the area on the main body 21 that contacts the seal 30, so as to reduce the risk of deformation of the area in contact with the seal 30.

[0066] The box structure 1, battery and electrical device, and the seal 30 are at least partially accommodated in the groove 211. Therefore, the seal 30 and the box cover 20 can share the space in the height direction Z of the box structure 1, which is beneficial to reduce the size of the box structure 1 in its height direction Z, so that the volume of the box structure 1 is reduced, which is beneficial to improve the space utilization and volume energy density of the box structure 1.

[0067] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A box structure, characterized in that: The box structure comprises: The box body (10) comprises a side wall portion (11) and a flange portion (12), wherein the flange portion (12) is arranged at the top end of the side wall portion (11) and is folded outward or inward relative to the side wall portion (11), and the flange portion (12) is arranged around the circumference of the side wall portion (11); A box cover (20) is located on the top side of the box body (10), and comprises a main body (21) and an edge portion (22) arranged circumferentially around the main body (21), wherein the edge portion (22) is stacked on the flange portion (12), and either the main body (21) or the flange portion (12) is recessed in a direction away from the other to form a groove (211); A sealing member (30) is at least partially received in the groove (211), and the sealing member (30) is sealingly connected between the main body (21) and the flange portion (12); A plurality of fasteners (40) are arranged along the circumference of the edge portion (22), and the fasteners (40) are used to connect and fix the edge portion (22) and the flange portion (12).

2. The box structure according to claim 1, characterized in that: The main body portion (21) is recessed in a direction away from the flange portion (12) to form the groove (211).

3. The box structure according to claim 1, characterized in that: The sealing member (30) is completely received in the groove (211).

4. The box structure according to claim 1, characterized in that: The folding angle between the side wall portion (11) and the flange portion (12) is 90°.

5. The box structure according to claim 1, characterized in that: The box structure also includes a reinforcing strip (50), which is arranged on the top side of the box cover (20) facing away from the box body (10), and includes a connected mounting portion (51) and a reinforcing portion (52), wherein the mounting portion (51) is pressed between the edge portion (22) and each of the fasteners (40), and the reinforcing portion (52) extends to the main body portion (21), and the orthographic projection of the reinforcing portion (52) on the flange portion (12) covers at least part of the orthographic projection of the sealing member (30) on the flange portion (12).

6. The box structure according to claim 5, characterized in that: The orthographic projection of the reinforcing portion (52) on the flange portion (12) covers the entire orthographic projection of the sealing member (30) on the flange portion (12).

7. The box structure according to claim 1, characterized in that: The fastener (40) is a threaded connection member and comprises a screw rod (41) and a screw sleeve (42); the screw rod (41) is sequentially inserted into the edge portion (22) and the flange portion (12); the screw sleeve (42) is located on the bottom side of the flange portion (12) facing away from the edge portion (22) and is threadedly engaged with the screw rod (41).

8. The box structure according to claim 1, characterized in that: The sealing member (30) extends along the circumference of the main body (21) and forms a closed loop structure.

9. A battery, characterized in that: The battery comprises: Battery cells, and; The box structure according to any one of claims 1 to 8 is used to accommodate the battery cells.

10. An electrical device, characterized in that: Comprising the battery as claimed in claim 9 above.

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