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 which comprises a bottom plate and a first side plate, and the first side plate is arranged in the circumferential direction of the bottom plate; the box cover comprises a top plate and a second side plate, the second side plate is at least arranged inside or outside the first side plate in a sleeving mode and extends towards the bottom plate, the second side plate comprises a main body part and an edge part which are sequentially arranged in the extending direction of the second side plate, and the main body part is connected between the top plate and the edge part; any one of the main body part and the first side plate is sunken towards the direction opposite to the other one to form a groove, and the edge part is laminated with the first side plate and / or the bottom plate; 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 first side plate in a sealed mode; and the fasteners are arranged in the circumferential direction of the edge part and used for connecting and fixing the edge part and the first side plate or the edge part and the bottom plate. 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] A box body, comprising a bottom plate and a first side plate, wherein the first side plate is arranged around the circumference of the bottom plate; and

[0007] A box cover, comprising a top plate and a second side plate, wherein the second side plate is at least sleeved inside or outside the first side plate and extends toward the bottom plate, and the second side plate comprises a main body portion and an edge portion sequentially arranged along its extension direction, the main body portion is connected between the top plate and the edge portion, and any one of the main body portion and the first side plate is recessed in a direction away from the other to form a groove, and the edge portion is stacked with the first side plate and / or the bottom plate;

[0008] a sealing member, at least partially received in the groove, and the sealing member is sealingly connected between the main body and the first side plate;

[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 first side plate, or the edge portion and the bottom plate.

[0010] In some embodiments, the second side plate is sleeved outside the first side plate and the bottom plate.

[0011] In some embodiments, the main body is recessed in a direction away from the first side plate to form the groove.

[0012] In some embodiments, the seal is completely received in the groove.

[0013] In some embodiments, the second side plate is sleeved outside the first side plate and the bottom plate;

[0014] The box structure also includes a reinforcing strip, which is arranged on the outer side of the second side panel facing away from the first side panel, 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 first side panel covers at least part of the orthographic projection of the seal on the first side panel.

[0015] In some embodiments, the orthographic projection of the reinforcing portion on the first side panel covers the entire orthographic projection of the sealing member on the first side panel.

[0016] In some embodiments, the fastener is a screw-connector, which is sequentially passed through the edge portion and the bottom plate and screwed with the edge portion and the bottom plate.

[0017] In some embodiments, the sealing member extends along the circumference of the main body and forms a closed loop structure.

[0018] A battery, comprising:

[0019] Battery cells, and;

[0020] The box structure as described in any one of the above items is used to accommodate the battery cells.

[0021] An electrical device comprises the battery as described in the above embodiment.

[0022] The above-mentioned box structure, battery and electrical device, since the groove is arranged on the first side plate or the second side plate, that is, the groove is located on one side of the box structure, therefore, when the seal is at least partially accommodated in the groove, the seal can share the height space and horizontal space with the box body and / or the box cover, and can reduce the size of the box structure in its height direction and horizontal direction. As a result, the volume of the box structure is reduced, thereby ultimately achieving the purpose of improving the space utilization and volume energy density of the box structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 An exploded view of a box structure in one embodiment of the present application;

[0024] Figure 2 for Figure 1 A partial cross-sectional view of the box structure after assembly shown;

[0025] Figure 3 for Figure 2 An enlarged schematic diagram of a local structure A of the box structure is shown.

[0026] Figure Number:

[0027] 1. Box structure;

[0028] 10. Box body; 20. Box cover; 30. Sealing member; 40. Fastener; 50. Reinforcement strip;

[0029] 11. bottom plate; 12. first side plate; 13. accommodation space;

[0030] 21. top plate; 22. second side plate; 221. main body; 222. edge portion; 223. groove;

[0031] 51. mounting portion; 52. reinforcement portion;

[0032] Z, height direction. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Please refer again Figure 1 , and also see Figure 2 and Figure 3 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 13 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.

[0044] Specifically, the box body 10 includes a bottom plate 11 and a first side plate 12, and the first side plate 12 is arranged around the circumference of the bottom plate 11. The bottom plate 11 and the first side plate 12 can be integrally formed, or the bottom plate 11 and the first side plate 12 can also be assembled to form the box body 10.

[0045] The box cover 20 includes a top plate 21 and a second side plate 22. The second side plate 22 is at least sleeved inside or outside the first side plate 12 and extends toward the bottom plate 11. The second side plate 22 includes a main body 221 and an edge portion 222 arranged in sequence along its extension direction. The main body 221 is connected between the top plate 21 and the edge portion 222. Either the main body 221 or the first side plate 12 is recessed in a direction away from the other to form a groove 223. The edge portion 222 is stacked with the first side plate 12 and / or the bottom plate 11.

[0046] The top plate 21 , the main body 221 , and the edge portion 222 may be integrally formed, or the top plate 21 , the main body 221 , and the edge portion 222 may be assembled to form the box cover 20 .

[0047] Specifically, the second side panel 22 is at least mounted inside or outside the first side panel 12. It can be understood that the second side panel 22 can be mounted only outside the first side panel 12, or can be mounted outside the first side panel 12 and the bottom panel 11 at the same time, or the first side panel 12 can be mounted outside the second side panel 22. Taking the example of the second side panel 22 being sleeved outside the first side panel 12 and the bottom panel 11, on the one hand, the second side panel 22 can better wrap the first side panel 12 and the bottom panel 11 to protect the first side panel 12 and the bottom panel 11 and improve the service life of the box body 10; on the other hand, the second side panel 22 has more overlapping areas with the first side panel 12 and the bottom panel 11. It can be understood that the overlapping areas of the second side panel 22 and the first side panel 12 and the overlapping areas of the second side panel 22 and the bottom panel 11 have better mechanical strength and better anti-deformation ability. Therefore, when the second side panel 22 is sleeved outside the first side panel 12 and the bottom panel 11, the overlapping areas of the second side panel 22 and the first side panel 12 and the bottom panel 11 are increased, which is beneficial to reduce the risk of deformation of the box structure 1 due to external impact.

[0048] As an example, the surfaces of the main body 221 and the edge 222 on the same side are both flush, that is, the inner surfaces of the main body 221 and the edge 222 are flush, and the outer surfaces of the main body 221 and the edge 222 are flush, at this time, the first side plate 12 is recessed in the direction away from the main body 221 to form the groove 223. Alternatively, as an example, a step can also be defined between the main body 221 and the edge 222, at this time, the main body 221 is recessed in the direction away from the first side plate 12 to form the groove 223, and this method of forming the groove 223 is simple and easy to operate.

[0049] 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.

[0050] The seal 30 is sealed between the main body 221 and the first side plate 12 . The seal 30 can reduce the amount of external water vapor that enters the battery through the gap between the main body 221 and the first side plate 12 , thereby achieving a sealing effect.

[0051] For example, the seal 30 includes a plurality of intermittently arranged seal portions, and all the seal portions are arranged at intervals along the circumference of the main body 221. Alternatively, the seal 30 may also extend along the circumference of the main body 221 and form a closed loop structure, so that the seal 30 can seal the gap between the main body 221 and the first side plate 12 along the circumference of the main body 221, and the sealing effect is good.

[0052] Further, the seal 30 is at least partially accommodated in the groove 223, such as the seal 30 is completely accommodated in the groove 223. In the prior art, the box body 10 and the box cover 20 are arranged at intervals along the height direction Z of the box structure 1, and the seal 30 is arranged in the gap between the box body 10 and the box cover 20, and is sealed and connected with the box body 10 and the box cover 20. Since the seal 30 occupies a certain height dimension of the box structure 1, the height dimension of the box structure 1 is too large. In the present application, since the groove 223 is arranged on the first side plate 12 or the second side plate 22, that is, the groove 223 is located on one side of the box structure 1, therefore, when the seal 30 is at least partially accommodated in the groove 223, the seal 30 can share the height space and horizontal space with the box body 10 and / or the box cover 20, and can reduce the size of the box structure 1 in its height direction Z and horizontal direction, and then, the volume of the box structure 1 is reduced, so that the purpose of improving the space utilization rate and volume energy density of the box structure 1 can be finally achieved.

[0053] A plurality of fasteners 40 are arranged along the circumference of the edge portion 222, and the fasteners 40 are used to connect and fix the edge portion 222 and the first side plate 12, or the edge portion 222 and the bottom plate 11, so as to realize the assembly of the box cover 20 and the box body 10. For example, the fastener 40 is a screw-connecting member, which is sequentially arranged on the edge portion 222 and the bottom plate 11, and is screwed with the edge portion 222 and the bottom plate 11. By setting the fastener 40 as a screw-connecting 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.

[0054] The second side plate 22 is sleeved outside the first side plate 12 and the bottom plate 11; and the box structure 1 further includes a reinforcing strip 50, which is arranged on the outer side of the second side plate 22 facing away from the first side plate 12, and includes a connected mounting portion 51 and a reinforcing portion 52. The mounting portion 51 is pressed between the edge portion 222 and each fastener 40, and the reinforcing portion 52 extends to the main body portion 221, and the orthographic projection of the reinforcing portion 52 on the first side plate 12 covers at least part of the orthographic projection of the sealing member 30 on the first side plate 12, such as, the orthographic projection of the reinforcing portion 52 on the first side plate 12 covers the entire orthographic projection of the sealing member 30 on the first side plate 12.

[0055] 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 .

[0056] As an example, the reinforcing strip 50 can be a closed-loop structure that extends continuously along the circumference of the second side panel 22, or the reinforcing strip 50 can also include a plurality of sub-strips, which are arranged at intervals along the circumference of the second side panel 22, 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 222, or the number of sub-strips can also be the same as the number of side surfaces of the second side panel 22 and corresponds one-to-one. Taking the second side panel 22 as a hollow rectangular structure as an example, the second side panel 22 has four sub-side surfaces that are connected in sequence, and there are also four sub-strips, each of which extends along the width direction of the sub-side panel corresponding to it.

[0057] The mounting portion 51 is pressed between the edge portion 222 and each fastener 40 to achieve the installation of the reinforcing strip 50, and the reinforcing portion 52 extends to the main body portion 221, and the orthographic projection of the reinforcing portion 52 on the first side plate 12 covers at least part of the orthographic projection of the seal 30 on the first side plate 12, thereby strengthening the strength of the area on the main body portion 221 that contacts the seal 30, so as to reduce the risk of deformation of the area in contact with the seal 30.

[0058] The above-mentioned box structure 1, battery and electrical device, since the groove 223 is arranged on the first side plate 12 or the second side plate 22, that is, the groove 223 is located on one side of the box structure 1, therefore, when the seal 30 is at least partially accommodated in the groove 223, the seal 30 can share the height space and horizontal space with the box body 10 and / or the box cover 20, and can reduce the size of the box structure 1 in its height direction Z and horizontal direction. As a result, the volume of the box structure 1 is reduced, thereby ultimately achieving the purpose of improving the space utilization and volume energy density of the box structure 1.

[0059] 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.

[0060] 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: A box body (10) comprises a bottom plate (11) and a first side plate (12), wherein the first side plate (12) is arranged around the circumference of the bottom plate (11); and A box cover (20) comprises a top plate (21) and a second side plate (22), wherein the second side plate (22) is at least sleeved inside or outside the first side plate (12) and extends toward the bottom plate (11), and the second side plate (22) comprises a main body (221) and an edge portion (222) arranged in sequence along its extension direction, the main body (221) is connected between the top plate (21) and the edge portion (222), and either the main body (221) or the first side plate (12) is recessed in a direction away from the other to form a groove (223), and the edge portion (222) is stacked with the first side plate (12) and / or the bottom plate (11); A sealing member (30) is at least partially received in the groove (223), and the sealing member (30) is sealingly connected between the main body (221) and the first side plate (12); A plurality of fasteners (40) are arranged along the circumference of the edge portion (222), and the fasteners (40) are used to connect and fix the edge portion (222) and the first side plate (12), or the edge portion (222) and the bottom plate (11).

2. The box structure according to claim 1, characterized in that: The second side plate (22) is sleeved outside the first side plate (12) and the bottom plate (11).

3. The box structure according to claim 1, characterized in that: The main body (221) is recessed in a direction away from the first side plate (12) to form the groove (223).

4. The box structure according to claim 1, characterized in that: The sealing member (30) is completely received in the groove (223).

5. The box structure according to claim 1, characterized in that: The second side plate (22) is sleeved outside the first side plate (12) and the bottom plate (11); The box structure also includes a reinforcing strip (50), which is arranged on the outer side of the second side panel (22) facing away from the first side panel (12), and includes a connected mounting portion (51) and a reinforcing portion (52), wherein the mounting portion (51) is pressed between the edge portion (222) and each of the fasteners (40), and the reinforcing portion (52) extends to the main body portion (221), and the positive projection of the reinforcing portion (52) on the first side panel (12) covers at least part of the positive projection of the sealing member (30) on the first side panel (12).

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

7. The box structure according to claim 1, characterized in that: The fastener (40) is a screw-connector, which is sequentially passed through the edge portion (222) and the bottom plate (11) and is screwed together with the edge portion (222) and the bottom plate (11).

8. The box structure according to claim 1, characterized in that: The sealing member (30) extends along the circumference of the main body (221) to form 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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